Measuring tape, measuring device and measuring method

Abstract

A measuring tape, a measuring device and a measuring method. The measuring tape comprises a first case (110), a tape (120), an optical positioning assembly (130) and a first controller (150). One end of the tape (120) is mounted in the first case (110), and the other end thereof extends out of the first case (110) and can move in a first measurement direction relative to the first case (110). When in operation, an imaging sensor (132) in the optical positioning assembly (130) can continuously acquire images of the tape (120) during its movement, and perform feature comparison on the images to determine in real time the relative displacement of the tape (120) moving in the first measurement direction; according to the relative displacement, the first controller (150) determines the length of the tape (120) extending out of the first case (110). The measuring tape does not need printed graduations on the tape (120) for reading, can achieve automatic and high-accuracy measurement by means of the imaging sensor (132) and the first controller (150), thus avoiding measurement errors caused by printing errors.

Description

Tape measure, measuring device and measuring method Technical Field

[0001] This specification relates to the field of measurement, and in particular to a measuring tape, a measuring device, and a measuring method. Background Art

[0002] With the advancement of technology, length measurement tools are widely used in work and life, and the demand for measurement accuracy is becoming increasingly higher. Traditional tape measures use printed graduations for visual identification. However, due to differences in vision and reading habits, measurement accuracy is low and data consistency is poor. Existing tape measures, on the other hand, use sensors to read an identification code printed on the tape to read the length. However, because the identification code relies on printing technology, which has low precision, measurement accuracy is low.

[0003] Therefore, there is a need to provide a new measuring tape, a measuring device and a measuring method to improve measurement accuracy.

[0004] The content of the background technology section is merely information known to the inventor personally, and does not mean that the above information has entered the public domain before the application date of this disclosure, nor does it mean that it can become the prior art of the present disclosure.

[0005] Summary of the Invention

[0006] This manual provides a measuring tape, a measuring device, and a measuring method, which can improve measurement accuracy.

[0007] In the first aspect, the present application provides a tape measure, which includes a first shell, a tape, an optical positioning assembly and an imaging sensor; the first shell is provided with a first outlet; the tape is installed in the first shell at one end and extends out of the first shell through the first outlet at the other end, and is capable of moving in a first measuring direction relative to the first shell; the optical positioning assembly is mechanically connected to the first shell, and the optical positioning assembly includes an imaging sensor and a first controller, wherein the imaging sensor is installed in the first shell and is arranged opposite to the surface of the tape. When working, it continuously captures images of the tape during movement and determines the relative displacement of the tape in the first measuring direction in real time by performing feature comparison on the images; the first controller is communicatively connected to the imaging sensor, receives the relative displacement when working, and determines the length of the tape extending out of the first shell in real time based on the relative displacement.

[0008] In a second aspect, the present application provides a measuring device, comprising: a tape measure provided by any one of the implementation methods of the first aspect above; and a laser ranging device connected to the tape measure, the laser ranging device comprising a second shell and a laser measuring part, the laser measuring part being arranged in the second shell, and measuring the distance in a second measurement direction through the second outlet when in operation.

[0009] In a third aspect, the present application provides a measurement method, which is applied to the tape measure provided in the first aspect. The measurement method includes: the imaging sensor continuously captures images of the tape during movement, and determines in real time the relative displacement of the tape in the first measurement direction by performing feature comparison on the images; and the first controller receives the relative displacement and determines in real time the length of the tape extending out of the first shell based on the relative displacement.

[0010] In summary, the tape measure, measuring device, and measuring method provided herein can continuously capture images of the tape as it moves through an imaging sensor. By comparing features of the continuously captured images, the relative displacement of the tape in a first measurement direction can be determined in real time. Furthermore, the first controller can calculate the length of the tape extending beyond the first housing, thereby achieving distance measurement. The imaging sensor in the tape measure provided herein can determine the relative displacement corresponding to adjacent images by comparing identical features in adjacent images. This allows the controller to calculate the distance the tape has moved in real time, eliminating the need for printed readings of the tape, thereby improving measurement accuracy.

[0011] Other features of the tape measure, measuring device, and measuring method provided in this specification are partially outlined in the following description. The following figures and examples will be readily apparent to those skilled in the art based on this description. The inventive aspects of the tape measure, measuring device, and measuring method provided in this specification can be fully demonstrated through practice or use of the methods, devices, and combinations provided in the following detailed examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of this specification, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0013] FIG1 shows a schematic structural diagram of a tape measure according to an embodiment of the present application;

[0014] FIG2 shows a schematic structural diagram of a tape ruler provided according to an embodiment of the present application;

[0015] FIG3 shows a schematic structural diagram of the relative position relationship between the imaging sensor and the tape according to an embodiment of the present application;

[0016] FIG4 shows a schematic diagram of an image captured by an imaging sensor according to an embodiment of the present application;

[0017] FIG5A shows another structural schematic diagram of a tape ruler provided according to an embodiment of the present application;

[0018] FIG5B shows another structural schematic diagram of a tape ruler according to an embodiment of the present application;

[0019] FIG5C shows a schematic structural diagram of a tape ruler according to an embodiment of the present application;

[0020] FIG6 shows a schematic flow chart of a measurement method according to an embodiment of the present application;

[0021] FIG7 shows a schematic flow chart of a method for determining relative displacement using an imaging sensor according to an embodiment of the present application;

[0022] FIG8 shows an interactive schematic diagram of a measurement method provided according to an embodiment of the present application;

[0023] FIG9 shows another interactive schematic diagram of a measurement method provided according to an embodiment of the present application;

[0024] FIG10 shows another interactive schematic diagram of a measurement method provided according to an embodiment of the present application;

[0025] FIG11 shows a schematic structural diagram of a brake assembly according to an embodiment of the present application;

[0026] FIG12A shows a schematic structural diagram of an execution body provided in an embodiment of the present application at one viewing angle;

[0027] FIG12B shows a schematic structural diagram of an execution body provided in accordance with an embodiment of the present application from another perspective;

[0028] FIG13 shows a schematic structural diagram of a connector according to an embodiment of the present application;

[0029] FIG14 shows a schematic structural diagram of an execution component according to an embodiment of the present application;

[0030] FIG15 shows a schematic structural diagram of a first housing according to an embodiment of the present application;

[0031] FIG16A shows a schematic structural diagram of the cooperation between the first housing and the actuator according to an embodiment of the present application;

[0032] FIG16B shows a cross-sectional schematic diagram of the cooperation structure between the first housing and the actuator in FIG16A ;

[0033] FIG17 shows a schematic structural diagram of a rotation limiting portion provided according to another embodiment of the present application;

[0034] FIG18A shows a schematic structural diagram of a sliding connection between an actuator and a connector according to an embodiment of the present application;

[0035] FIG18B shows a schematic cross-sectional view FF of FIG18A ;

[0036] FIG19A shows a schematic structural diagram of a brake component provided in accordance with an embodiment of the present application at one viewing angle;

[0037] FIG19B shows a schematic structural diagram of a brake component provided in accordance with an embodiment of the present application from another perspective;

[0038] FIG20 shows a schematic structural diagram of a tape measure provided according to an embodiment of the present application;

[0039] FIG21 shows a schematic structural diagram of a brake assembly according to another embodiment of the present application;

[0040] FIG22 shows a schematic structural diagram of a measuring device according to an embodiment of the present application;

[0041] FIG23 shows an exploded view of a laser ranging device according to an embodiment of the present application;

[0042] FIG24A is a schematic diagram showing a tape measure provided by an embodiment of the present application and connected to a laser distance measuring device with the measuring directions being opposite;

[0043] FIG24B is a schematic diagram showing a tape measure and a laser distance measuring device provided in an embodiment of the present application when connected in the same measuring direction;

[0044] FIG24C is a schematic diagram showing a tape measure provided by an embodiment of the present application and connected to a laser distance measuring device with the measuring direction being vertical;

[0045] FIG25A shows a schematic structural diagram of the tape measure shown in FIG22 of the present application;

[0046] FIG25B shows an enlarged view of portion A of the tape measure shown in FIG25A according to the present application;

[0047] FIG26A shows a schematic structural diagram of the laser ranging device shown in FIG22 of the present application at a first viewing angle;

[0048] FIG26B shows a schematic structural diagram of the laser ranging module shown in FIG22 of the present application at a second viewing angle;

[0049] FIG26C shows an enlarged view of portion B of the laser ranging module shown in FIG26B according to the present application;

[0050] FIG27 shows a schematic diagram of target points and reference points provided according to an embodiment of the present application;

[0051] FIG28A shows a diagram illustrating the internal working principle of a reticle assembly according to an embodiment of the present application;

[0052] FIG28B shows a schematic diagram of a laser marking line according to an embodiment of the present application;

[0053] FIG29A shows a schematic diagram of a partial structure of a measuring device provided according to an embodiment of the present application;

[0054] FIG29B shows a schematic diagram of the field of view of a laser according to an embodiment of the present application;

[0055] FIG30 shows a schematic structural diagram of a light blocking member according to an embodiment of the present application;

[0056] FIG31A is a schematic diagram showing a light blocking member provided in an embodiment of the present application being located in a first position and rotating to block light;

[0057] FIG31B is a schematic diagram showing a light blocking member 331 provided in an embodiment of the present application being located in a second position and rotating to block light;

[0058] FIG32 is a schematic diagram showing the posture of the marking adjustment assembly in the first position according to an embodiment of the present application;

[0059] FIG33A shows a posture diagram of a reflector provided in accordance with the present application;

[0060] Figure 33B shows a posture diagram of the reflector after rotation provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0061] The following description provides specific application scenarios and requirements for this specification, with the goal of enabling those skilled in the art to make and use the contents of this specification. Various modifications to the disclosed embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but is intended to be accorded the broadest scope consistent with the claims.

[0062] The terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. For example, as used herein, the singular forms "a," "an," and "the" may also include the plural forms unless the context clearly indicates otherwise. When used in this specification, the terms "comprise," "include," and / or "contain" are intended to refer to the presence of the associated integers, steps, operations, elements, and / or components, but do not preclude the presence of one or more other features, integers, steps, operations, elements, components, and / or groups or the addition of other features, integers, steps, operations, elements, components, and / or groups in the system / method.

[0063] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0064] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0065] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0066] In this application, "X includes at least one of A, B, or C" means that X includes at least A, or X includes at least B, or X includes at least C. In other words, X can include only any combination of A, B, and C, or it can include any combination of A, B, and C as well as other possible contents / elements. The arbitrary combination of A, B, and C can be A, B, C, AB, AC, BC, or ABC.

[0067] In this application, unless explicitly stated otherwise, the association relationship between structures can be a direct association relationship or an indirect association relationship. For example, when describing "A is connected to B", unless it is explicitly stated that A is directly connected to B, it should be understood that A can be directly connected to B or indirectly connected to B; for another example, when describing "A is above B", unless it is explicitly stated that A is directly above B (AB are adjacent and A is above B), it should be understood that A can be directly above B or indirectly above B (AB is separated by other elements and A is above B). And so on.

[0068] These and other features of this specification, as well as the operation and function of the associated elements of the structure, and the economical assembly and manufacture of the components, can be significantly improved with consideration of the following description. Reference is made to the accompanying drawings, all of which form a part of this specification. However, it should be expressly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0069] FIG1 shows a schematic structural diagram of a tape measure provided according to an embodiment of the present application. Referring to FIG1 , the tape measure 100 provided in this specification may include: a first housing 110, a tape 120, an optical positioning assembly 130, and a first controller 150. In some embodiments, the tape measure 100 may also include a brake assembly 140. In some embodiments, the tape measure 100 may also include a tape recovery assembly 160. In some embodiments, the tape measure 100 may also include a guide assembly 170. In some embodiments, the tape measure 100 may also include an output assembly (not shown in FIG1 ).

[0070] The tape measure 120 can be installed in the first housing 110 and can be pulled out or retracted relative to the first housing 110 to move in a target direction relative to the first housing 110 to measure the length. The direction indicated by the arrow in Figure 1 is the target direction D. The target direction D can be the measuring direction of the tape measure 100. For ease of distinction, we define the measuring direction of the tape measure 100 as the first measuring direction. The optical positioning assembly 130 can be installed in the first housing 110 and can measure the relative displacement of the tape measure 120 relative to the first housing 110 along the target direction D. The first controller 150 can calculate the length of the tape measure 120 pulled out of the first housing 110 based on the relative displacement.

[0071] 1 , the first housing 110 may be a mounting base for the tape measure 100. Other components of the tape measure 100 (such as the tape 120, the optical positioning assembly 130, the brake assembly 140, the first controller 150, the tape recovery assembly 160, and the output assembly) may be mounted with the first housing 110 as a carrier. The first housing 110 may include a housing cavity 112 so that other components can be mounted in the housing cavity 112. The first housing 110 may be provided with a first outlet 114. The tape 120 may be pulled out of or retracted into the first housing 110 through the first outlet 114. In some embodiments, the first outlet 114 may extend along the target direction D, thereby maintaining the tape 120 from extending and retracting in the target direction D.

[0072] The tape 120 may be the portion of the tape measure 100 used for length measurement. One end of the tape 120 may be mounted within the first housing 110, such as within the accommodating cavity 112. The other end of the tape 120 may extend out of the first housing 110 through the first outlet 114 and may be movable relative to the first housing 110 in a target direction D. In some embodiments, a limit stop 122 may be provided at one end of the tape 120 extending through the first outlet 114. When the tape 120 is retracted into the first housing 110, the limit stop 122 abuts against the first outlet 114 of the first housing 110 to prevent the tape 120 from fully entering the first housing 110. In some embodiments, an accessory structure connected to the tape 120 and moving with the tape 120 may also serve as part of the tape 120.

[0073] In some embodiments, the tape measure 100 may further include a tape recovery assembly 160. The tape recovery assembly 160 may be rotatably mounted within the accommodating cavity 112. The tape recovery assembly 160 is rotatable relative to the first housing 110. One end of the tape 120 mounted within the first housing 110 may be connected to the tape recovery assembly 160 and wound around the tape recovery assembly 160. When the tape 120 is pulled out of the first housing 110, the tape recovery assembly 160 rotates forward to release the tape 120 wound around the tape recovery assembly 160, allowing the tape 120 to be pulled out. When the tape 120 retracts into the first housing 110, the tape recovery assembly 160 rotates backward to wind the tape 120 around the tape recovery assembly 160, thereby recovering the tape 120.

[0074] In some embodiments, the tape measure 100 may further include a guide assembly 170. The guide assembly 170 may be mounted within the accommodating cavity 112. The guide assembly 170 may include a guide slot extending along a target direction D. The end of the tape 120 extending from the first housing 110 may pass through the guide slot and then extend out of the first outlet 114 of the first housing 110, such that the tape 120 moves in the target direction D when being pulled out of or retracted into the first housing 110.

[0075] The optical positioning assembly 130 is mechanically connected to the first housing 110. The optical positioning assembly 130 can be mounted within the accommodating cavity 112. The optical positioning assembly 130 can be used to read the length of the tape 120 extending from the first housing 110. The optical positioning assembly 130 can include an imaging sensor 132. The imaging sensor 132 can be mounted within the first housing 110, such as within the accommodating cavity 112. The imaging sensor 132 can be positioned relative to the surface of the tape 120. During operation, the imaging sensor 132 continuously captures images of the tape 120 as it moves and, by comparing features in the images, determines in real time the relative displacement of the tape 120 in the target direction D. In some embodiments, the imaging sensor 132 can be mounted relative to a position that is aligned with the linear movement of the tape 120 along the target direction D. That is, the movement of the tape 120 within the image capture range of the imaging sensor 132 is linear movement along the target direction D. In this case, the images of the tape 120 captured by the imaging sensor 132 are images of the tape 120 as it moves along the target direction D. Therefore, the imaging sensor 132 compares features between adjacent captured images to determine the different pixel locations corresponding to identical features of the tape 120 in the adjacent images. This allows real-time determination of the relative displacement of the tape 120 as it moves in the target direction D, ensuring the accuracy of the relative displacement calculation. For example, the imaging sensor 132 can be installed at any location between the first outlet 114 and the guide assembly 170. For example, the imaging sensor 132 can be installed at the outlet 114. For example, the imaging sensor 132 can be installed at the guide assembly 170. In other embodiments, the imaging sensor 132 can be installed relative to the non-linear movement of the tape 120. For example, the imaging sensor 132 can be installed relative to the wrapped portion of the tape 120 in Figure 1. That is, the movement of the tape 120 within the image capture range of the imaging sensor 132 is rotational about its axis. In this case, the image of the tape 120 captured by the imaging sensor 132 is an image of the tape 120 during its rotation about its axis.

[0076] In some embodiments, the tape measure 100 may further include a first distance member. The first distance member may be disposed within the accommodating cavity 112. The first distance member is used to adjust the distance between the imaging sensor 132 and the tape 120. When the imaging sensor 132 is operating, the first distance member can maintain the distance between the imaging sensor 132 and the tape 120 within a first operating range. When the distance between the imaging sensor 132 and the tape 120 is within this first operating range, the imaging sensor 132 can function normally.

[0077] The optical positioning assembly 130 may also include a position identification sensor 134. The position identification sensor 134 may be mounted within the first housing 110, such as within the accommodating cavity 112. The position identification sensor 134 may be positioned relative to the surface of the tape 120. During operation, it reads the position markers provided on the tape 120 (described in detail later in FIG. 5 ), and then determines the actual extension length of the tape 120 corresponding to the read position markers, thereby correcting the relative displacement determined by the imaging sensor 132. In some embodiments, the position identification sensor 134 may be mounted relative to a position where the tape 120 is linearly moving along a target direction D. The movement of the tape 120 within the recognition range of the position identification sensor 134 is linear movement along the target direction D. Therefore, the tape 120 moves along the target direction D when passing through the position identification sensor 134. The position identification sensor 134 determines the absolute length of the tape 120 extending from the first housing 110 in the target direction D by identifying the position markers provided on the tape 120. For example, if the position identification sensor 134 identifies the position mark of the ruler tape 120 at 10 centimeters, it can be determined that the absolute length of the ruler tape 120 extending from the first housing 110 in the target direction D is 10 centimeters. The position identification sensor 134 can be installed at any position between the first outlet 114 and the guide assembly 170. The installation position of the position identification sensor 134 can also be set relative to the rotation of the ruler tape 120 around the axis. The movement of the ruler tape 120 within the recognition range of the position identification sensor 134 is a rotation around the axis. Therefore, the ruler tape 120 rotates around the axis when passing the position identification sensor 134. The imaging sensor 132 and the position identification sensor 134 can be set on the same side of the ruler tape 120 or on different sides.

[0078] In some embodiments, the tape measure 100 may further include a second distance member. The second distance member may be installed in the accommodating cavity 112. The second distance member is used to adjust the distance between the position identification sensor 134 and the tape 120. When the position identification sensor 134 is operating, the second distance member can maintain the distance between the position identification sensor 134 and the tape 120 within a second operating range. When the distance between the position identification sensor 134 and the tape 120 is within this second operating range, the position identification sensor 134 can function normally.

[0079] It can be understood that when the position identification sensor 134 and the imaging sensor 132 are arranged on the same side of the scale tape 120, and the spacing requirement between the position identification sensor 134 and the scale tape 120 is the same as or similar to the spacing requirement between the imaging sensor 132 and the scale tape 120, the position identification sensor 134 and the imaging sensor 132 can share a distance member to save space in the first shell 110.

[0080] Referring to Figure 1 , a first controller 150 can be mounted within the housing cavity 112 . The first controller 150 can be communicatively coupled to the optical positioning assembly 130 to exchange data with the optical positioning assembly 130 . For example, the first controller 150 can be communicatively coupled to the imaging sensor 132 and can receive the relative displacement of the tape 120 in the target direction D from the imaging sensor 132 . Based on this relative displacement, the first controller 150 can calculate the length of the tape 120 extending from the first housing 110, thereby achieving digital measurement. This specification does not limit the type of the first controller 150 . The first controller 150 may include: a single-chip microcomputer, a central processing unit (CPU), a graphics processing unit (GPU), a physical processing unit (PPU), a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic device (PLD), a microcontroller, a microprocessor, a reduced instruction set computer (RISC), an advanced RISC machine (ARM), an application specific integrated circuit (ASIC), that is, the first controller 150 is any circuit or processor capable of performing one or more functions, or any combination thereof.

[0081] FIG2 illustrates a schematic structural diagram of a tape ruler 120 provided according to an embodiment of the present application. Referring to FIG2 , the tape ruler 120 may include two surfaces 127 and 128. For ease of description, the surface opposite the imaging sensor 132 is defined as the first surface 127, and the other surface is defined as the second surface 128. As shown in FIG2 , neither the first surface 127 nor the second surface 128 may be provided with any printed markings. It is understood that scale marks 124 may also be printed on the surface of the tape ruler 120 for easier viewing by the user. As previously described, the imaging sensor 132 can determine the different pixel positions corresponding to the same features of the tape ruler 120 in adjacent images by performing feature comparison on the images, thereby determining the relative displacement of the tape ruler 120 in real time as it moves in the target direction D. Therefore, in order for the imaging sensor 132 to capture features on the first surface 127 of the tape ruler 120, the surface roughness of the first surface 127 must be within the recognition range of the imaging sensor 132. The surface roughness of the first surface 127 is within the recognition range of the imaging sensor 132, and the feature formed by the roughness of the surface of the first surface 127 can be within the recognition range of the imaging sensor 132. For example, the surface roughness of the first surface 127 can be controlled during processing of the tape 120 to achieve the above function. For example, the surface of the first surface 127 can be coated with a nylon film to increase its roughness, thereby achieving the above function. Specifically, during the movement of the tape 120, the micro-concave and convex parts of the rough surface of the tape 120 will produce bright areas (i.e., convex peaks) and dark areas (i.e., behind the peaks and valleys), thereby generating a non-uniform two-dimensional brightness distribution. The above-mentioned non-uniform two-dimensional brightness distribution generated by the first surface 127 of the tape 120 is beneficial for the imaging sensor 132 to perform feature comparison, thereby improving the measurement accuracy.

[0082] FIG3 illustrates a schematic diagram of the relative positions of an imaging sensor 132 and tape 120 according to an embodiment of the present application. Referring to FIG3 , the imaging sensor 132 may include an imaging component 132-1 and an image processing circuit 132-3. As shown in FIG3 , in some embodiments, the imaging sensor 132 may also include a receiving lens 132-5. In some embodiments, the imaging sensor 132 may also include a light source 132-7.

[0083] The imaging component 132-1 can be an image capture device that captures images of the tape 120 during movement. The imaging component 132-1 can capture images at a preset frequency to continuously capture images of the tape 120 during movement. The preset frequency can ensure that images captured by the imaging sensor 132 at adjacent time points at least partially overlap, allowing the imaging sensor 132 to calculate the relative displacement of the tape 120 between adjacent images based on the overlapping features. For example, regardless of whether the tape 120 is being extended at a fast or slow speed, if features in adjacent images captured by the imaging component 132-1 at least partially overlap, the imaging sensor 132 can calculate the relative displacement of the tape 120. In some embodiments, the preset frequency at which the imaging component 132-1 captures images can be determined based on the speed range of the tape 120 during extension or retraction. The speed range of the tape 120 during extension or retraction can be determined using a variety of methods, such as empirical, statistical, experimental, machine learning, or any combination thereof. In some embodiments, the preset frequency can be a fixed value, for example, a preset image capture frequency of no less than 2000 FPS (Frames per Second). In some embodiments, the preset frequency can vary within a certain range, for example, adaptively adjusting the preset frequency within the range based on the roughness of the captured image. For example, if the range is [1000 FPS, 5000 FPS], then when the speed of the tape 120 is low, the preset frequency is close to the capture frequency of 1000 FPS. When the speed of the tape 120 is high, the preset frequency is close to the capture frequency of 5000 FPS. In other words, the preset frequency is within the range and is positively correlated with the speed of the tape 120. By adaptively adjusting the capture frequency, measurement efficiency can be improved while ensuring measurement accuracy. Thus, the imaging component 132-1 captures images at the above capture frequency, continuously capturing images of the tape 120 as it moves. The imaging component 132-1 can be any device capable of capturing images, such as a miniature CMOS (Complementary Metal Oxide Semiconductor) camera. The imaging component 132-1 can also be other devices known in the art for rapid photography, which are not limited in this specification.

[0084] The image processing circuit 132-3 can be communicatively connected to the imaging component 132-1 to receive images captured by the imaging component 132-1. Furthermore, the image processing circuit 132-3 can perform feature comparison on the received images to determine, in real time, the relative displacement of the tape 120 in the target direction D. The first controller 150 and / or the image processing circuit 132-3 can control the imaging component 132-1's capture frequency, and start and stop image capture.

[0085] Referring to Figure 3, a receiving lens 132-5 is positioned between the imaging component 132-1 and the tape 120. The imaging component 132-1 can be located in the imaging plane of the receiving lens 132-5 with respect to the tape 120. The receiving lens 132-5 can focus light reflected from the tape 120 onto the imaging component 132-1, thereby improving measurement efficiency. The receiving lens 132-5 projects the non-uniform two-dimensional brightness distribution of the tape 120, which is then captured by the imaging component 132-1. This allows for continuous capture of images of the tape 120 as it moves.

[0086] Referring to Figure 3 , light source 132-7 can be positioned on the side of first surface 127 of tape scale 120 to emit light toward tape scale 120. When light source 132-7 illuminates first surface 127 of tape scale 120 at an angle, it is more conducive to producing a non-uniform two-dimensional brightness distribution. Therefore, the combination of light source 132-7 and imaging component 132-1 improves feature matching accuracy and, ultimately, measurement accuracy.

[0087] The imaging component 132-1 can be directly opposite the first surface 127 of the tape 120. At this time, the imaging component 132-1 has a high field of view uniformity, and at the same time, the imaging sensor 132 can occupy a small volume in the housing of the tape measure 100. The imaging component 132-1 can also be diagonally opposite the first surface 127 of the tape 120, such as the imaging component 132-1' and the receiving lens 132-5'. At this time, the imaging component 132-1' is in the direction of the strongest reflected light and has a high surface adaptability. Compared with the shooting area (diameter d1) of the imaging component 132-1 facing the first surface 127, the shooting area (diameter d2) of the imaging component 132-1' diagonally opposite the first surface 127 is larger, which is conducive to improving measurement efficiency. It can be understood that in actual applications, the imaging sensor 132 can be set according to actual needs, and the embodiments of the present application are not limited to this.

[0088] FIG4 shows a schematic diagram of an image captured by the imaging sensor 132 according to an embodiment of the present application. Referring to FIG4 , image 510 and image 520 are images captured at adjacent time points. The acquisition timestamp of image 510 is greater than the acquisition timestamp of image 520. Image 510 and image 520 respectively contain target feature points 50 of the same characteristics. In other words, image 510 and image 520 overlap at least partially at the target feature points 50. The target feature points can be a group of pixels. For example, image 520 is taken as the current frame image, and image 510 is taken as the previous frame image of the current frame. After the imaging component 132-1 captures image 520, it sends it to the image processing circuit 132-3, and the image processing circuit 132-3 processes image 520 and image 510 through a spatial cross-correlation algorithm. Specifically, image processing circuit 132-3 performs a feature comparison on image 520 and image 510, applying a spatial cross-correlation algorithm to determine the locations of the maximum cross-correlation coefficients (Xi, Yi) in the two image frames. This determines the coordinates of the target feature points 50 of the same characteristic between the two image frames. For example, the first location of (Xi, Yi) in image 510 and the second location of (Xi, Yi) in image 520 are determined. Furthermore, the two-dimensional displacement (ΔXi, ΔYi) between the two image frames is determined. For example, if the direction of movement of tape 120 (i.e., target direction D) is the Y-axis direction, ΔYi can be determined as the relative displacement of image 520 relative to the previous image 510 in target direction D.

[0089] It should be noted that the aforementioned relative displacement is a vector quantity. If the target direction D in which the tape 120 extends from the first housing 110 is positive and the direction in which the tape 120 retracts into the first housing 110 is negative, then when the image 520 corresponds to the tape 120 extending from the first housing 110 relative to the image 510, the aforementioned relative displacement is positive. When the image 520 corresponds to the tape 120 retracting into the first housing 110 relative to the image 510, the aforementioned relative displacement is negative. It will be appreciated that, because the imaging component 132-1 captures images at a high frequency, the image processing circuit 132-3 also determines the aforementioned relative displacement at a high frequency, thereby ensuring real-time determination of the relative displacement.

[0090] After the image processing circuit 132-3 determines the relative displacement corresponding to the current frame image relative to the previous frame image, it sends it to the first controller 150, so that the first controller 150 can determine the length of the tape 120 extending out of the first shell 110 in the target direction D in real time based on the received relative displacement.

[0091] The state in which the stopper 122 of the tape 120 is in contact with the first outlet 114 of the first housing 110 can be referred to as the initial state of the tape measure 100, and the state in which the tape 120 is pulled out (i.e., the state in which the stopper 122 of the tape is not in contact with the first outlet 114) can be referred to as the operating state of the tape measure 100. In response to the tape measure 100 switching from the initial state to the operating state, the first controller 150 controls the imaging sensor 132 to start operating.

[0092] The image processing circuit 132-3 and the first controller 150 can be connected via a serial port, so that the image processing circuit 132-3 transmits the relative displacement calculated in the above embodiment to the first controller 150, allowing the first controller 150 to determine in real time the length of the tape 120 extending from the first housing 110 in the target direction D. In some embodiments, after determining the relative displacement corresponding to each frame of image, the image processing circuit 132-3 may transmit the relative displacement to the first controller 150 sequentially, ensuring that the first controller 150 can determine the extended length of the tape 120 in real time and output the measurement reading in real time. In some embodiments, to reduce the number of information exchanges, the image processing circuit 132-3 may also transmit the relative displacement corresponding to N (an integer greater than 1) consecutive frames of image to the first controller 150, indicating the relative displacement corresponding to the Nth frame. In other words, the relative displacement is reported to the first controller 150 every N-1 frames of image. For example, after the image processing circuit 132-3 continuously determines the relative displacement corresponding to five frames of image, it sends the relative displacement corresponding to the fifth frame of image to the first controller 150, rather than sending the relative displacement corresponding to each frame of image from the first to the fifth frame to the first controller 150 in sequence. In this specification, since the imaging component 132-1 has a high shooting frequency, this embodiment can effectively ensure that the first controller 150 can ensure the real-time determination of the extended length of the tape 120, while also reducing the number of information exchanges and lowering the power consumption of the tape measure 100.

[0093] After receiving the relative displacement corresponding to the current frame image, the first controller 150 adds the relative displacement to the relative length corresponding to the previous frame image to obtain the relative length corresponding to the current frame image. The relative length corresponding to the current frame image is: The displacement of the tape 120 relative to the first outlet 114 in the target direction D calculated by the first controller 150 from the time the first controller 150 controls the imaging sensor 132 to the time the current frame image is captured. For example, if the relative displacement corresponding to image 520 relative to image 510 corresponds to the tape 120 extending out of the first housing 110, the relative displacement corresponding to image 520 is a positive value of 0.110, and the relative length corresponding to image 510 is 50 centimeters, then the relative length corresponding to image 520 is 50.110 centimeters. When the image 520 corresponds to the tape 120 being retracted into the first housing 110 relative to the image 510 , the relative displacement corresponding to the image 520 is a negative value of -0.101, and the relative length corresponding to the image 510 is still 50 cm. Thus, the relative length corresponding to the image 520 is 48.999 cm.

[0094] In some embodiments, the limit platform 122 has a thickness, which may affect measurement accuracy. Here, the thickness of the limit platform 122 is referred to as the "initial length." During the measurement process, the relative length determined by the first controller 150 is superimposed on the thickness of the limit platform 122 (i.e., the initial length) to obtain accurate numerical measurement data.

[0095] In other embodiments, the tape measure 100 may have manufacturing errors. In one case, the first controller 150 controls the imaging sensor 132 to begin measuring only after the tape 120 has moved a certain distance (referred to as the initial length). This means that the stopper 122 of the tape 120 has moved the initial length before reaching the measurement starting point. In this case, the initial length is a negative value, so the relative length determined by the first controller 150 must be added to this negative value to accurately determine the length of the tape 120 extending beyond the first housing 110. Alternatively, if the tape 120 has not moved and has already extended a certain distance (referred to as the initial length), the initial length is a positive value. The relative length determined by the first controller 150 must be added to this positive value to accurately determine the length of the tape 120 extending beyond the first housing 110. In response to the above-mentioned manufacturing error of the tape measure 100, after the first controller 150 calculates the relative length corresponding to the current frame image based on the relative displacement sent by the imaging sensor 132, it adds the pre-stored initial length of the tape 120 extending out of the first shell 110 to the above-mentioned relative length in real time to obtain the length of the tape 120 extending out of the first shell 110 in real time.

[0096] To further enhance measurement accuracy, the present embodiment also provides a tape measure 100 with a calibration function. Referring to the tape measure 120 shown in Figures 5A-5C , the tape measure 100 includes corresponding position markers 126 at multiple preset locations on the surface of the tape 120. Furthermore, a position recognition sensor 134 reads these position markers 126, and the position of the read position marker 126 on the tape 120 is then determined as an absolute length. This absolute length can be used to correct errors in calculating the extended length of the tape 120 based on the relative displacement determined by the imaging sensor 132.

[0097] All position markers 126 are located on the same side of the tape 120, such as the first side 127 or the second side 128. Furthermore, in some embodiments, the position markers 126 and the scale 124 for visual reading may be located on the same side of the tape, as shown in FIG5C . In some embodiments, the position markers 126 and the scale 124 for visual reading may be located on different sides of the tape, as shown in FIG5B . Having the position markers 126 and scale 124 on different sides reduces printing complexity and reduces the rate of defective products.

[0098] Specifically, the position markers 126 at different positions may be different. There is a one-to-one correspondence between each position marker 126 and the actual extension length of the tape 120 , and the position markers 126 are pre-stored in the storage unit of the tape measure 100 .

[0099] In some embodiments, M (M is a positive integer) position markers 126 divide the tape 120 into M+1 segments, and the distance of each segment can be the same. For example, in Figure 5A, L1, L2, etc. are all 5 cm; that is, the end position of the first position marker 126 corresponds to the tape extending 5 cm, the end position of the second position marker 126 corresponds to the tape extending 10 cm, and so on. In some embodiments, the distance of each segment can also be different. For example, the end position of the first position marker 126 corresponds to the tape extending 3 cm, the end position of the second position marker 126 corresponds to the tape extending 7 cm, the end position of the third position marker 126 corresponds to the tape extending 12 cm, and so on. In some embodiments, some of the M+1 segments can have the same distance, while others can have different distances. By providing the above-mentioned position markers 126, the embodiments of this specification can ensure that the error caused by the imaging sensor 132 exists only in the segment between adjacent position markers 126 and does not accumulate to the next segment. For example, the error caused by the imaging sensor 132 within the range of 0-5 cm (L1 segment) only exists in the range of measuring length of 0-5 cm (L1 segment). After reading the position mark 126 at 5 cm, the above error will be cleared and will not accumulate to the range of measuring length of 5-10 cm (L2 segment). In some embodiments, the above position mark 126 can be composed of a bar code that can be detected in both the extension and retraction directions of the tape. The encoding method of the above position mark 126 can adopt an encoding method that is well known in the art and can meet the above requirements, such as an interleaved 25 bar code, or it can be defined as needed. For example, in the embodiment shown in Figures 5A to 5C, the position mark 126 adopts a binary encoding method. Specifically: Referring to Figures 5A to 5C, each position code 126 includes a flag bit P1 and a data bit P2, wherein the data bit P2 adopts a binary encoding method. As the tape 120 is pulled out of the first housing 110, the flag bit P1 and data bit P2 of each position marker 126 are read sequentially. Flag bit P1 serves as the starting bit, and data bit P2 is also read in a forward direction (e.g., if the binary value of data bit P2 is 001, it is read in a forward direction, i.e., "0," "0," "1," and read in a reverse direction, i.e., "1," "0," "0," etc.). Thus, the absolute length of the tape 120 currently extended can be determined based on the binary value corresponding to data bit P2 of each position marker 126. For example, if the binary value of data bit P2 is 001, the absolute length stored associated with it is 5 cm.During the process of the tape 120 retracting into the first shell 110, the data bit P2 and the flag bit P1 of each position marker 126 are read in sequence, the flag bit P1 serves as the end bit and the data bit P2 is also read in reverse, so that the absolute length of the tape currently extended can be determined based on the binary corresponding to the data bit of each position marker 126. If "1", "0", and "0" are read in sequence, it can be determined that the data bit P2 is binary 001, and it can be further determined that the absolute length stored associated with it is 5 cm.

[0100] The position identification sensor 134 is disposed opposite the side of the tape 120 on which the position markers 126 are provided. For example, in the case of the tape 120 shown in Figures 5A and 5B, the position identification sensor 134 is disposed opposite the second side 128 of the tape 120. In the case of the tape 120 shown in Figure 5C, the position identification sensor 134 is disposed opposite the first side 127 of the tape 120. In some embodiments, the position identification sensor 134 may be a photoelectric sensor. The reflectivity of the intervals between the dark stripes in each position marker 126 differs from the reflectivity of the dark stripes. Thus, the photoelectric sensor can identify the flag bit P1 and the data bit P2 based on the different reflectivities at the position markers 126, determine the binary corresponding to the data bit P2, and then generate an absolute position signal corresponding to the current position marker 126 based on the binary. In some embodiments, the position identification sensor 134 may also be a Hall effect sensor. The dark stripes of the position marker 126 have different magnetic properties than the dark stripes of the dark stripes. Thus, the Hall effect sensor can identify the flag bit P1 and data bit P2 based on the magnetic difference at the position marker 126, determine the binary representation corresponding to data bit P2, and then generate an absolute position signal corresponding to the current position marker 126 based on the binary representation. During the movement of the tape 120, the position identification sensor 134 responds to reading the target position marker 126 and generates an absolute position signal corresponding to the target position marker 126 based on the sequence of the flag bit P1 and data bit P2 read and the data bit P2 in the target position marker 126. If the position identification sensor 134 reads the flag bit P1 and data bit P2 of the target position identifier 126 in sequence, it means that the tape 120 is currently in the process of being pulled out of the first shell 110, so the data bit P2 is also read in the forward direction. The specific data bit P2 is "0", "1", and "1" in sequence. Therefore, the position identification sensor 134 can determine the absolute position signal corresponding to the above-mentioned target position identifier 126 based on the data bit P2 and the forward reading identifier. For example, the position identification sensor 134 can directly use the binary of the data bit P2 as the absolute position signal corresponding to the above-mentioned target position identifier 126. If the position identification sensor 134 reads the data bit P2 and the flag bit P1 in sequence, it means that the tape 120 is currently in the process of retracting into the first shell 110, so the data bit P2 is also read in reverse, specifically "1", "1", and "0" are read in sequence, so that the position identification sensor 134 can determine the absolute position signal corresponding to the above-mentioned target position identifier 126 based on the data bit P2 and the reverse reading identifier. For example, the position identification sensor 134 can directly use the binary of the data bit P2 as the absolute position signal corresponding to the above-mentioned target position identifier 126, or can use the reversely read data bit P2 and the forward reading identifier as the above-mentioned absolute position signal, and the first controller 150 decodes the data bit P2 in the above-mentioned target position identifier 126.The forward reading and reverse reading indicators are used to inform the first controller 150 whether the tape 120 is currently extended or retracted into the first housing 110. Specific indicators may be specified in advance and are not limited in this specification.

[0101] The position identification sensor 134 can be communicatively connected to the first controller 150, so that the position identification sensor 134 can transmit the absolute position signal generated when the position marker 126 is identified to the first controller 150. Furthermore, if the first controller 150 does not receive the absolute position signal, it accumulates the received relative displacements to determine the relative length. Upon receiving the absolute position signal, the first controller 150 clears the accumulated relative length. Specifically, suppose that before receiving the absolute position signal, the relative length DL-1 corresponding to 10,000 frames of images has already been determined. In response to receiving the absolute position signal, the first controller 150 clears the determined relative length DL-1. The first controller 150 then redefines the relative length based on the relative displacement received after the reset. This redetermined relative length can be understood as the displacement relative to the preset position corresponding to the target position marker 126 currently identified by the tape 120. If the preset position corresponding to the currently identified target position mark 126 is 15 cm (that is, the absolute length of the extended tape is 15 cm), the manual states that "the first controller 150 will redetermine the relative length based on the relative displacement received after clearing", that is, the first controller 150 will use "15 cm" as the starting point for calculating the relative length.

[0102] In the above embodiment, after receiving the absolute position signal, the first controller 150 also determines the position of the target position marker 126 on the tape 120 corresponding to the absolute position signal. Specifically, based on the absolute position signal, the first controller 150 can determine that the currently read position marker 126 is the target position marker 126 with binary data bits "011." Based on the pre-stored one-to-one correspondence between each position marker 126 and the actual extension length of the tape 120, the first controller 150 can determine that the absolute extension length of the tape 120 is currently 15 centimeters, which is stored in association with the target position marker 126. Furthermore, the first controller 150 re-determines the relative length based on the relative displacement received after the reset, and adds this relative length to the absolute length, such as 15 centimeters, to obtain the relative length corresponding to the current frame image. Furthermore, the first controller 150 adds this relative length to the initial length to determine, in real time, the length of the tape 120 extending from the housing in the target direction D.

[0103] In other embodiments, the imaging sensor 132 can not only determine the relative displacement between two adjacent images, but also accumulate the determined relative displacements. For example, when the above-mentioned image 520 corresponds to the extension of the ruler tape 120 from the first housing 110 relative to the image 510, the relative displacement between the two images is a positive value of 0.110, and the relative displacement corresponding to the image 510 is 50 centimeters, then the relative displacement corresponding to the image 520 is 50.110 centimeters. Therefore, the first controller 150 can determine the relative displacement corresponding to a received frame of image as the relative length corresponding to the frame of image, and further add the relative length to the above-mentioned initial length to determine the extension length of the ruler tape 120 in the target direction D at the time point of the acquisition of the frame of image. In this embodiment, the above-mentioned imaging sensor 132 can clear the accumulated relative displacement when receiving the above-mentioned absolute position signal. The measurement scheme provided by this embodiment can improve measurement accuracy. Specifically, the position identification sensor 134 is communicatively connected to the first controller 150, so that the position identification sensor 134 can send the absolute position signal generated when the position mark 126 is identified to the first controller 150. Furthermore, after the first controller 150 receives the absolute position signal, it needs to inform the imaging sensor 132 to clear the accumulated relative displacement. Specifically, the first controller 150 generates a clear signal in response to receiving the absolute position signal, and sends the clear signal to the imaging sensor 132. In response to receiving the clear signal, the imaging sensor 132 clears the determined relative displacement. After receiving the clear signal, the imaging sensor 132 restarts taking images at the preset frequency, and re-determines and accumulates the relative displacement based on the image that is restarted after clearing. Among them, the relative displacement can actually be understood as the displacement at the preset position corresponding to the target position mark 126 currently identified on the tape. For example, if the preset position corresponding to the currently identified target position marker 126 is 15 centimeters (i.e., the absolute length of the extended tape is 15 centimeters), the phrase "redetermining the relative displacement based on the image captured after resetting to zero" in this specification refers to a displacement relative to "15 centimeters." Furthermore, the specific implementation of how the imaging sensor 132 redetermines the relative displacement based on the image captured after resetting to zero can be found in the embodiments described above and will not be further elaborated here.

[0104] In the above embodiment, after receiving the absolute position signal, the first controller 150 determines the position of the target position marker 126 on the tape 120 corresponding to the absolute position signal. Specifically, based on the absolute position signal, the first controller 150 can determine that the currently read position marker 126 is a target position marker 126 with binary data bits "011." Based on the pre-stored one-to-one correspondence between each position marker 126 and the actual extension length of the tape 120, the first controller 150 can determine that the current absolute extension length of the tape 120 is the length stored in association with the target position marker 126. Furthermore, the first controller 150 receives the relative displacement newly determined and accumulated by the imaging sensor 132 based on the image captured after resetting, and determines the relative length based on this. The controller then adds the determined relative length to the absolute length to obtain the relative length corresponding to the current frame image. Furthermore, the first controller 150 adds the relative length to the initial length to determine, in real time, the length of the tape 120 extending out of the first housing 110 in the target direction D.

[0105] In some embodiments, in addition to determining the relative displacement, the imaging sensor 132 can also be used to identify the position marker 126. Therefore, the imaging sensor 132 needs to be positioned opposite the side of the tape 120 where the position marker 126 is located. Specifically, the first controller 150 determines the absolute length of the tape 120 based on the imaging sensor 132's recognition of the position marker 126. After the imaging sensor 132 recognizes the position marker 126, it clears the determined relative displacement and redetermines the relative displacement. Ultimately, the first controller 150 determines, in real time, the length of the tape 120 extending from the first housing 110 in the target direction D based on the redetermined relative displacement and the absolute length corresponding to the recognized position marker 126.

[0106] Figure 6 shows a flow chart of a measurement method P100 according to an embodiment of the present application. The measuring method P100 provided in this specification is performed by the aforementioned measuring tape 100. Referring to Figure 6, the measuring method P100 provided in this specification may include: S710 and S720.

[0107] In S710 , the imaging sensor 132 continuously captures images of the tape 120 during its movement, and determines the relative displacement of the tape 120 in the target direction D in real time by performing feature comparison on the images.

[0108] In response to the tape measure 100 switching from its initial state to its operating state, the first controller 150 controls the imaging component 132-1 (e.g., a miniature CMOS camera) to begin operation. The imaging component 132-1 captures images during the tape measure 100's movement, continuously capturing images of the tape measure 100 during its movement. The captured images are then transmitted in real time to the image processing circuit 132-3. The initial state and operating state of the tape measure 100 are as previously described and will not be further elaborated upon here.

[0109] For example, the image processing circuit 132-3 compares features based on the images continuously captured by the imaging component 132-1, and determines the distance the tape 120 corresponding to the set of adjacent images has moved in the target direction D based on the distance the same feature has moved between the adjacent images. The image processing circuit 132-3 may sequentially transmit the distance the tape 120 has moved in the target direction D corresponding to each set of adjacent images as the relative displacement described above to the first controller 150. Alternatively, the image processing circuit 132-3 may determine the distance the tape 120 has moved in the target direction D corresponding to multiple sets of adjacent images and then transmit the distance the tape 120 has moved in the target direction D corresponding to the last set of adjacent images to the first controller 150.

[0110] As mentioned above, the above relative displacement is a vector, which will not be described here in detail.

[0111] 6 , in S720 , the first controller 150 determines the length of the tape 120 extending out of the first housing 110 in real time according to the relative displacement.

[0112] In some embodiments, after receiving the relative displacement corresponding to the current frame image, the first controller 150 adds the relative displacement to the relative length corresponding to the previous frame image to obtain the relative length corresponding to the current frame image. The relative length corresponding to the current frame image is the displacement of the tape 120 relative to the first outlet 114 in the target direction D calculated by the first controller 150 from the time the first controller 150 controls the imaging sensor 132 to the time the current frame image is captured.

[0113] It is understood that, as previously described, the limit platform 112 may have a thickness, and the tape measure 100 may have manufacturing errors. In response to the aforementioned situation of the tape measure 100, upon receiving the relative displacement signal from the imaging sensor 132, the first controller 150 adds the pre-stored initial length of the tape 120 extending from the first housing 110 to the aforementioned relative length in real time to obtain the actual length of the tape 120 extending from the first housing 110.

[0114] Fig. 7 shows a flow chart of a method P200 for determining relative displacement by the imaging sensor 132 according to an embodiment of the present application. Referring to Fig. 7 , P200 shown in the figure includes: S712-S718, which can be used as a specific implementation of S710 in P100.

[0115] In S712 , the imaging component 132 - 1 captures images at a preset frequency to continuously capture images of the tape 120 during its movement.

[0116] In S714, the image processing circuit 132-3 performs feature comparison on the current frame image and the adjacent previous frame image to determine the target feature points with the same features in the two frame images; and, in S716, the image processing circuit 132-3 determines the relative displacement of the above-mentioned tape in the current frame image relative to the previous frame image in the target direction D based on the first position of the above-mentioned target feature points in the current frame image and the second position of the above-mentioned target feature points in the previous frame image.

[0117] In some embodiments, referring to Figure 4, the image processing circuit 132-3 may use image 520 as the current frame image and image 510 as the previous frame image of the current frame. The specific processes of steps S712, S714 and S176 are as described above and will not be repeated here.

[0118] In some embodiments, after the imaging sensor 132 determines the relative displacement corresponding to the current frame image through method P200, the image processing circuit 132-3 of the imaging sensor transmits the relative displacement corresponding to the current frame image to the first controller 150, so that the first controller 150 can further determine the total length of the tape 120 extended in the target direction D. As previously described, the frequency or interval at which the image processing circuit 132-3 of the imaging sensor 132 transmits the relative displacement to the first controller 150 is as previously described and will not be further elaborated upon here.

[0119] Since the imaging component 132-1 of the imaging sensor 132 has a high shooting frequency, this specification can effectively ensure that the first controller 150 can ensure the real-time determination of the extended length of the tape 120, while also reducing the number of information interactions and reducing the power consumption of the tape measure 100.

[0120] In an exemplary embodiment, after determining the length of the tape 120 extending from the first housing 110, the first controller 150 can control the output component to output the measurement data in real time. For example, the measurement data can be displayed in real time on the display screen of the tape measure 100 and / or the measurement data can be voice-announced through the speaker of the tape measure 100. Alternatively, the measurement data can be transmitted to an external device via an output interface, so that the measurement data is displayed on the display screen of the external device and / or the measurement data is voice-announced through the speaker of the external device. For example, as the tape 120 is extended out of / into the first housing 110, the number displayed on the display screen continuously changes according to the extension / retraction of the tape 120. When the tape 120 stops moving, the number displayed on the display screen corresponds to the current extension length of the tape 120, thereby automatically providing the user with the measurement result, eliminating the need for the user to visually check the tape measurement reading. This not only facilitates the user's determination of the measurement data, but also avoids errors caused by visual inspection, thereby improving measurement accuracy.

[0121] As mentioned above, in order to further improve the measurement accuracy, the embodiment of this specification also provides a measuring tape 100 with a calibration function.

[0122] FIG8 shows an interactive diagram of a measurement method P300 according to an embodiment of the present application. Referring to FIG8 , the method P300 provides a measurement method performed by the tape measure 100 including the aforementioned position marker 126 and the aforementioned position identification sensor 134. As shown in FIG8 , the method P300 may include:

[0123] S910: The imaging sensor 132 continuously captures images of the tape 120 during its movement and, by comparing features of the images, determines in real time the relative displacement of the tape 120 in the target direction D. The specific implementation of the imaging sensor 132 for determining the relative displacement has been described in detail above and will not be repeated here.

[0124] As shown in FIG8 , method P300 may further include:

[0125] S920: The first controller 150 receives the relative displacement determined by the imaging sensor; and S930: The first controller 150 adds the relative displacement corresponding to the current frame image to the relative length corresponding to the previous frame image to obtain the relative length corresponding to the current frame image. The principle by which the first controller 150 determines the relative length has been described in detail in the previous embodiment and will not be repeated here.

[0126] As shown in FIG8 , method P300 may further include:

[0127] S940: The position identification sensor 134 reads the position marker 126 of the ruler tape 120 as it passes through the position identification sensor 134 during movement; and, S950: The position identification sensor 134 generates a corresponding absolute position signal and sends it to the first controller 150. The principle of the position identification sensor 134 identifying the position marker 126 has been described in detail in the previous embodiment and will not be repeated here. When the position identification sensor 134 identifies the position marker 126, it generates an absolute position signal corresponding to the identified position marker 126. Furthermore, the position identification sensor 134 sends the absolute position signal corresponding to the identified position marker 126 to the first controller 150.

[0128] As shown in FIG8 , method P300 may further include:

[0129] At step S960, the first controller 150 receives the absolute position signal and clears the accumulated relative length based on the absolute position signal. Furthermore, at step S970, the first controller 150 receives the relative displacement from the imaging sensor 132 after the clearing process and begins a new accumulation. In some embodiments, after receiving the absolute position signal, the first controller 150 clears the accumulated relative length to avoid or reduce error accumulation in the relative displacement.

[0130] As shown in FIG8 , method P300 may further include:

[0131] S980: The first controller 150 determines the length of the tape 120 extending out of the first housing 110 in real time according to the relative displacement when the first controller 150 is working.

[0132] For example, in the tape measure 100 having the position marker 126 and the position identification sensor 134 , a specific embodiment of the first controller 150 determining the length of the tape 120 extending out of the first housing 110 includes:

[0133] S982: The first controller 150 identifies an absolute length corresponding to the absolute position signal based on the absolute position signal; and

[0134] S984: The first controller 150 accumulates the absolute length corresponding to the preset position and the relative displacement in real time to obtain the length of the tape 120 extending out of the first housing 110 in real time.

[0135] In some embodiments, after receiving the absolute position signal, the first controller 150 further determines the position of the target position marker 126 corresponding to the absolute position signal on the tape 120, and obtains the absolute length corresponding to the target position marker 126. Specifically, based on the absolute position signal, the first controller 150 can determine that the currently read position marker 126 is a target position marker 126 with binary data bits "011." Based on the pre-stored one-to-one correspondence between each position marker 126 and the actual extended length of the tape 120 (i.e., the absolute length), the first controller 150 can determine that the currently extended absolute length of the tape 120 is the length stored in association with the target position marker 126.

[0136] Furthermore, the first controller 150 determines a relative length by combining the absolute length with the relative displacement received after the reset. For example, the first controller 150 adds the relative length to the initial length to determine the length of the tape 120 extending out of the housing in the target direction D in real time.

[0137] FIG9 shows another interactive schematic diagram of a measurement method P400 provided according to an embodiment of the present application. Referring to FIG9 , the method P400 provides a measurement method performed by a tape measure 100 including the above-mentioned position marker 126 and the above-mentioned position identification sensor 134. The imaging sensor 132 can not only determine the relative displacement between adjacent images, but also accumulate the relative displacement. The imaging sensor 132 can receive a reset signal sent by the first controller 150 and reset the accumulated relative displacement based on the received reset signal. As shown in FIG9 , the method P400 may include:

[0138] S1010: The position identification sensor 134 reads the position marker 126 of the ruler tape 120 passing through the position identification sensor 134 during movement. And, S1020: The position identification sensor 134 generates a corresponding absolute position signal and sends it to the first controller 150. The principle of the position identification sensor 134 identifying the position marker 126 has been described in detail in the previous embodiment and will not be repeated here. When the position identification sensor 134 identifies the position marker 126, it generates an absolute position signal corresponding to the identified position marker 126. Furthermore, the position identification sensor 134 sends the absolute position signal corresponding to the identified position marker 126 to the first controller 150.

[0139] As shown in FIG9 , method P400 may further include:

[0140] S1030 : The first controller 150 receives the absolute position signal and generates a reset signal based on the absolute position signal. And, S1040 : The first controller 150 sends the reset signal to the imaging sensor 132 to reset the relative displacement of the imaging sensor 132 .

[0141] In some embodiments, after receiving the absolute position signal, the first controller 150 may need to instruct the imaging sensor 132 to reset the accumulated relative displacement to zero to prevent error accumulation in the relative displacement. Specifically, in response to receiving the absolute position signal, the first controller 150 may generate a reset signal and send the reset signal to the imaging sensor 132.

[0142] As shown in FIG9 , method P400 may further include:

[0143] S1050: When the imaging sensor 132 is working, it continuously collects images of the tape ruler 120 during its movement, and determines the relative displacement of the tape ruler 120 in the target direction D in real time by performing feature comparison on the images.

[0144] For example, in the tape measure 100 having the position marker 126 and the position identification sensor 134 , a specific implementation of the imaging sensor 132 determining the relative displacement may include:

[0145] S1052: The imaging sensor 132 receives a clear signal;

[0146] S1054: the imaging sensor 132 clears the relative displacement determined by the imaging sensor 132 based on the clear signal; and

[0147] S1056: The imaging sensor 132 determines the relative displacement according to the image after the zeroing. At this time, the relative displacement includes the relative displacement of the tape 120 in the target direction D after the zeroing signal.

[0148] As shown in FIG9 , method P400 may further include:

[0149] S1060 : The imaging sensor 132 sends the relative displacement to the first controller 150 .

[0150] As shown in FIG9 , method P400 may further include:

[0151] S1070: When the first controller 150 is working, it determines the length of the tape 120 extending out of the first housing 110 in real time according to the relative displacement.

[0152] For example, in the tape measure 100 having the position marker 126 and the position identification sensor 134 , a specific embodiment of the first controller 150 determining the length of the tape 120 extending out of the first housing 110 includes:

[0153] S1072: The first controller 150 identifies a preset position corresponding to the absolute position signal based on the absolute position signal; and

[0154] S1074 : The first controller 150 accumulates the absolute length corresponding to the preset position and the relative displacement in real time to obtain the length of the tape 120 extending out of the first housing 110 in real time.

[0155] Specifically, when the first controller 150 does not receive the above-mentioned absolute position signal, it can determine the relative displacement corresponding to the current frame image sent by the imaging sensor 132 as the relative length corresponding to the current frame image. Further, by adding the relative length corresponding to the current frame image to the above-mentioned initial length, it can determine the extended length of the ruler tape 120 in the above-mentioned target direction D at the time of acquisition of the current frame image. When the first controller 150 receives the above-mentioned absolute position signal, it can add the relative displacement corresponding to the current frame image sent by the imaging sensor 132 and the most recently determined absolute length to determine the relative length corresponding to the current frame image. Further, by adding the relative length corresponding to the current frame image to the above-mentioned initial length, it can determine the extended length of the ruler tape 120 in the above-mentioned target direction D at the time of acquisition of the current frame image.

[0156] FIG10 shows another interactive schematic diagram of the measurement method P500 provided in an embodiment of the present application. Referring to FIG10 , in the embodiment provided by the method P500, the position identification sensor 134 as in the embodiment described above is not provided. Instead, the position marker 126 is identified by the imaging sensor 132. It should be noted that in this embodiment, the imaging sensor 132 is disposed opposite the side of the tape 120 on which the position marker 126 is provided. Specifically, the method P500 may include:

[0157] S1110: The imaging sensor 132 reads the position mark 126 of the tape 120 passing through the imaging sensor 132 during the movement, and generates a corresponding absolute position signal;

[0158] S1120: The imaging sensor 132 sends the generated absolute position signal to the first controller 150;

[0159] S1130: The imaging sensor 132 clears the relative displacement determined by the imaging sensor 132 based on the absolute position signal.

[0160] S1140: The imaging sensor 132 determines a relative displacement based on the image after the zeroing process. The relative displacement includes the relative displacement of the tape 120 in the target direction D after the zeroing process.

[0161] S1150: The imaging sensor 132 sends the determined relative displacement to the first controller 150;

[0162] S1160: The first controller 150 identifies a preset position corresponding to the absolute position signal based on the absolute position signal; and

[0163] S1180 : The first controller 150 accumulates the absolute length corresponding to the preset position and the relative displacement in real time to obtain the length of the tape 120 extending out of the first housing 110 in real time.

[0164] As shown in the embodiment shown in FIG10 , the position marker 126 is identified by the imaging sensor 132. Then, on the one hand, the imaging sensor 132 resets its accumulated relative displacement and re-determines the relative displacement based on the image captured after the reset. On the other hand, it generates an absolute position signal and notifies the first controller 150, allowing the first controller 150 to determine the absolute length. Furthermore, the first controller 150 accumulates the determined absolute length with the relative displacement signaled by the imaging sensor 132 after the reset process to determine the length of the tape 120 extending from the first housing 110 in real time.

[0165] In some embodiments, referring to FIG1 , the tape measure 100 may further include a brake assembly 140. FIG11 shows a schematic structural diagram of the brake assembly 140 provided according to an embodiment of the present application. Referring to FIG11 , the brake assembly 140 may be mounted on the first housing 110. The brake assembly 140 may include: an actuator 142 and a brake assembly 144. The brake assembly 144 is mounted in the first housing 110 and is capable of contacting or separating from the tape 120. When the brake assembly 144 and the tape 120 are in contact, braking of the tape 120 can be achieved. When the brake assembly 144 and the tape 120 are in a separated state, the tape 120 can be switched from a braking state to a non-braking state, thereby releasing the tape 120 in the braking state.

[0166] Referring to Figure 11 , the actuator 142 provided herein includes an actuator 142-1 and a connector 142-3. The actuator 142-1 includes two triggering surfaces that can receive triggering forces from different directions, thereby avoiding the measurement inflexibility associated with the single triggering surface of the brake assembly in existing tape measures. The connector 142-3 is movably mounted within the first housing 110 and movably connected to the actuator 142-1. When either of the two triggering surfaces of the actuator 142-1 receives a triggering force in a corresponding direction, the actuator 142-1 can drive the connector 142-3 to move relative to the first housing 110 in a first direction (direction D1 shown in Figure 12A ), thereby driving the brake component 144 into contact with or out of contact with the tape 120, thereby braking or releasing the tape 120. The first direction D1 is perpendicular to the target direction D of movement of the tape 120 and is also perpendicular to the first triggering surface 142-11.

[0167] The tape measure 100 provided in this specification is provided with an actuator 142-1 having two triggering surfaces and a connector 142-3 movably connected to the actuator 142-1. Thus, when either triggering surface receives a triggering force, the actuator 142-1 can drive the connector 142-3 to move in the first direction D1, thereby driving the brake component 144 to switch the brake component 144 and the tape 120 from a separated state to a contact state, or vice versa. Thus, during measurement using the tape measure 100, even if one triggering surface of the actuator 142-1 is in contact with another obstacle, preventing the user from reaching it, the user can still control the tape 120 through the other triggering surface of the actuator 142-1, thereby effectively improving measurement flexibility.

[0168] Figures 12A and 12B respectively illustrate schematic structural diagrams of an actuator 142-1 provided in accordance with an embodiment of the present application at different viewing angles. Referring to Figures 12A and 12B, the actuator 142-1 provided herein may include: a first triggering surface 142-11 and a second triggering surface 142-13. In some embodiments, the actuator 142-1 may further include a rotational connection portion 142-15. In some embodiments, the actuator 142-1 also includes a rotational limit portion (referred to as a "first rotational limit portion," such as 142-17 shown in the figure).

[0169] Referring to Figures 12A and 12B , the first trigger surface 142-11 and the second trigger surface 142-13 are non-parallel. Specifically, the second trigger surface 142-13 is tilted relative to the first trigger surface 142-11 toward the tape 120, and the tilt is at an angle. For example, the tilt angle may be an acute angle as shown in Figure 12A . This allows the two trigger surfaces to receive trigger forces from different directions. When either the first trigger surface 142-11 or the second trigger surface 142-13 is triggered, the actuator 142 drives the brake component 144 to contact or separate from the tape 120. In some embodiments, when the first trigger surface 142-11 is not triggered, the first trigger surface 142-11 is parallel to the first side surface of the first housing 110 and is disposed within an opening in the first side surface. For example, the first trigger surface 142-11 is coplanar or nearly coplanar with the first side surface of the first housing 110. When the second trigger surface 142-13 is not triggered, the second trigger surface 142-13 is parallel to the second side surface of the first housing 110 and is disposed within the opening of the second side surface. For example, the second trigger surface 142-13 is coplanar or nearly coplanar with the second side surface of the first housing 110. Therefore, when the tape measure 100 is used for measurement, the trigger surface does not affect the fit between the tape measure 100 and another object, thereby ensuring measurement accuracy.

[0170] In some embodiments, referring to Figures 12A and 12B , the first trigger surface 142-11 can be roughly rectangular in shape, with the second trigger surface 142-13 disposed on the side of the first pair of sides (the short sides of the rectangle as shown), and the rotational connection portion 142-15 disposed on the side of the second pair of sides (the long sides of the rectangle as shown). For example, holes for axial connection can be disposed on the sides of the second pair of sides, approximately at the midpoints of the long sides, such as hole A in Figure 3A and hole B in Figure 3B . Specifically, the actuator 142-1 can be movably connected to the connector 142-3 via the rotational connection portion 142-15, i.e., a rotational connection. The rotational connection portion 142-15 can be located on the opposite side of the first trigger surface 142-11. Specifically, the rotational center of the rotational connection is disposed opposite the first trigger surface 142-11 and is eccentric with respect to the second trigger surface 142-13.

[0171] In some embodiments, referring to Figures 12A and 12B , the second trigger surface 142-13 is located at one end of the first trigger surface 142-11, and the first rotation limiter 142-17 is located at the end of the first trigger surface 142-11 away from the second trigger surface 142-13. Specifically, as in the above-described embodiment, the first rotation limiter 142-17 is disposed on the side surface where the first opposite edge is located. For example, when the first trigger surface 142-11 is triggered, the actuator 142-1 and the connected member 142-3 it drives move in the first direction D1 without relative rotation therebetween. In this case, no interaction force exists between the first rotation limiter 142-17 and the first housing 110. When the second trigger surface 142-13 is triggered, there is a tendency for relative rotation or relative rotation between the actuator 142-1 and the connected member 142-3 it drives. To ensure that the connected member 142-3 moves along the first direction D1, this relative rotation or tendency needs to be limited. Therefore, in this case, the first rotation limit portion 142-17 cooperates with the first shell 110 to limit the above-mentioned relative rotation or relative rotation trend, thereby ensuring that the connecting member 142-3 moves along the first direction D1, and further ensuring that the execution component 142 can smoothly trigger or separate the tape 120.

[0172] Based on the structural setting of the actuator 142-1 as described above, when the first trigger surface 142-11 is triggered, the actuator 142-1 drives the connecting member 142-3 to move along the first direction through the rotation connection; when the second trigger surface 142-13 is triggered, the first rotation limiter 142-17 cooperates with the first shell 110 to limit the rotation of the actuator 142-1 relative to the connecting member 142-3, thereby ensuring that the actuator 142-1 drives the connecting member 142-3 to move along the first direction D1.

[0173] FIG13 shows a schematic diagram of the structure of a connector 142-3 according to an embodiment of the present application. Referring to FIG13 , the connector 142-3 provided herein may include a rotational engagement portion 142-31. In some embodiments, the connector 142-3 may also include a guide portion 142-33. In some embodiments, the connector 142-3 provided herein may also include a drive portion 142-35.

[0174] 13 , the rotational engagement portion 142 - 31 may be provided with a hole C and a hole D. Thus, the rotational connection between the connector 142 - 3 and the actuator 142 - 1 may be achieved through the holes provided in the rotational engagement portion 142 - 31 and the holes provided in the rotational connection portion 142 - 15 .

[0175] The guide portion 142-33 is arranged along the first direction D1 and is slidably connected to the first housing 110 along the first direction D1. Therefore, when any triggering surface of the actuator 142-1 is triggered, the connector 142-3, which is movably connected to the actuator 142-1, can move along the first direction D1, thereby driving the brake component 144 to separate from or contact the tape 120. In some embodiments, at least one set of guide portions 142-33 may be provided. Each set of guide portions 142-33 includes two guide portions, specifically located on the left and right sides of the tape 120, to ensure the stability of the connector 142-3's movement along the first direction D1.

[0176] During movement of the connecting member 142-3 along the first direction D1, the driving unit 142-35 is used to drive the braking component 144, specifically driving the braking component 144 into contact with or separation from the tape 120, thereby braking or releasing the tape 120. For example, at least one set of driving units 142-35 may be provided, with each set of driving units 142-35 including two driving units, specifically located on the left and right sides of the tape 120.

[0177] Figure 14 shows a schematic diagram of the structure of an actuator 142 according to an embodiment of the present application. In addition to an actuator 142-1 and a connector 142-3, the actuator 142 may also include a connecting shaft 142-2. In some embodiments, the actuator 142 may also include an elastic support portion 142-4.

[0178] The actuator 142-1 and the connecting member 142-3 are connected by a connecting shaft 142-2. Specifically, the connecting shaft 142-2 passes through holes A, C, D, and B in sequence, thereby achieving a rotational connection between the actuator 142-1 and the connecting member 142-3. Thus, when the first trigger surface 142-11 is triggered, the actuator 142-1 drives the connecting member 142-3 in the first direction D1 through this rotational connection. When the second trigger surface 142-13 is triggered, if the first rotation limiter 142-17 is not present, the actuator 142-1 and the connecting member 142-3 rotate relative to each other about this rotational connection. When the second trigger surface 142-13 is triggered, the first rotation limit portion 142-17 cooperates with the first shell 110 to limit the above-mentioned rotation of the actuator 142-1 relative to the connecting member 142-3, so that when any trigger surface is triggered, the actuator 142-1 can drive the connecting member 142-3 to move along the first direction D1.

[0179] In some embodiments, referring to FIG14 , one end of the elastic support portion 142-4 is fixed inside the first shell 110, and the other end of the elastic support portion 142-4 is connected to the elastic support portion 142-4. The elastic support portion 142-4 is used to support the connecting member 142-3 so that when the first trigger surface 142-11 and the second trigger surface 142-13 are not triggered, the connecting member 142-3 does not generate a driving force on the braking component 144, or the driving force generated by the connecting member 142-3 on the braking component 144 is small, which does not cause the braking component 144 to move. The elastic support portion 142-4 can be used in conjunction with the guide portion 142-33 in the connecting member 142-3. The number of elastic support portions 142-4 is related to the number of guide portions 142-33; the setting position of the elastic support portion 142-4 inside the first shell 110 is related to the installation position of the guide portion 142-33. If the tape measure 100 is provided with a set of guide portions 142-33, a set of elastic support portions 142-4 may also be provided. For example, the elastic support portion 142-4 may be a spring. Specifically, the guide portion 142-33 extends through a hole in the center of the spring, thereby ensuring that the connector 142-3 can stably move along the first direction D1. When any triggering surface is not triggered, the driving force exerted by the connector 142-3 on the brake component 144, supported by the elastic support portion 142-4, does not cause the brake component 144 to move, thereby ensuring stable control of the tape 120. When any triggering surface is triggered, the elastic support portion 142-4 is compressed in the first direction D1, causing the actuator 142-1 and the connector 142-3 to move along the first direction D1. The driving force exerted by the connector 142-3 on the brake component 144 causes the brake component 144 to move, thereby controlling the braking state of the tape 120.

[0180] Figure 15 shows a schematic structural diagram of the first shell 110 provided according to an embodiment of the present application. The first shell 110 may further include a limit block 116. The limit block 116 is located on the side of the actuator 142-1 away from the connecting member 142-3, and the limit block 116 is arranged opposite to the first rotation limit portion 142-17 of the actuator 142-1. Specifically, when the second trigger surface 142-13 of the actuator 142-1 is triggered, if the above-mentioned limit block 116 is not provided, the actuator 142-1 will rotate relative to the connecting member 142-3. In this specification, when the second trigger surface 142-13 of the actuator 142-1 is triggered, the limit block 116 abuts against the first rotation limit portion 142-17 of the actuator 142-1 to limit the rotation of the actuator 142-1 relative to the connecting member 142-3, so that the actuator 142-1 drives the connecting member 142-3 to move along the first direction D1 through the rotating connecting portion 142-15.

[0181] Figure 16A shows a schematic diagram of the structure of the first shell 110 and the actuator 142-1 provided in accordance with an embodiment of the present application. Figure 16B shows a cross-sectional schematic diagram of the structure of the first shell 110 and the actuator 142-1 in Figure 16A. When the second trigger surface 142-13 is triggered, the limit block 116 provided by the first shell 110 cooperates with the first rotation limit portion 142-17 of the actuator 142-1. Specifically, the limit platform 116 provided by the first shell 110 is in the shape of an axis, and the first rotation limit portion 142-17 is in a rotating shape that can cooperate with the axis. By cooperating with the axis-shaped limit platform 116 and the rotating first rotation limit portion 142-17, the rotation of the actuator 142-1 relative to the connecting member 142-3 can be limited. For example, a hole 118 can also be formed between the above-mentioned axis-shaped limit platform 116 and other parts of the first shell 110. The rotary first rotation limiting portion 142 - 17 can extend into the hole 118 to increase the contact area between the first rotation limiting portion 142 - 17 and the limiting platform 116 , thereby improving the limiting stability.

[0182] It can be understood that in other embodiments, the first rotation limit portion 142-17 included in the actuator 142-1 is in the shape of an axis, and the limit platform 116 provided by the first shell 110 is in a rotating shape that can cooperate with the axis. By cooperating with the axis-shaped rotation limit portion and the rotating limit platform, the rotation of the actuator 142-1 relative to the connecting member 142-3 can be limited.

[0183] Figure 17 shows a schematic structural diagram of a second rotation limiter 142-17' provided according to another embodiment of the present application. Referring to Figure 17, the second rotation limiter 142-17' of the actuator 142-1 can be provided on one side of the rotation connection portion 142-15. When the second trigger surface 142-13 is triggered, the second rotation limiter 142-17' limits the relative rotation between the actuator 142-1 and the connection member 142-3, thereby achieving the purpose of moving the connection member 142-3 along the first direction D1. In some embodiments, the actuator 142-1 can be an integrally formed structure, wherein the second rotation limiter 142-17' is a part of the integrally formed actuator 142-1. The second rotation limiter 142-17' can also be detachably connected to other components of the actuator 142-1. The angle between the second rotation limiter 142-17' and other components of the actuator 142-1 can be adjusted to increase control flexibility. It is understandable that the relative angle between the second rotation limiting portion 142 - 17 ′ and other components of the actuator 142 - 1 can be set according to actual needs, and this specification does not limit this.

[0184] The above embodiment introduces an embodiment of a rotational connection between the actuator 142-1 and the connecting member 142-3. In other embodiments, the actuator 142-1 and the connecting member 142-3 can also be movably connected by a sliding connection.

[0185] Figure 18A illustrates a schematic structural diagram of a sliding connection between an actuator 142-1 and a connector 142-3 according to an embodiment of the present application. Figure 18B illustrates a cross-sectional schematic diagram FF of Figure 18A. The actuator 142 may include a first trigger surface 142-11, a second trigger surface 142-13, and a sliding connection portion 142-15'. Furthermore, the connector 142-3 includes a sliding engagement portion 142-37. The second trigger surface 142-13 is inclined relative to the first trigger surface 142-11 toward the tape 120, and the inclination is at an angle. This angle may be acute, right, or obtuse. Specifically, the sliding engagement portion 142-37 cooperates with the sliding connection portion 142-15' to enable the actuator 142-1 and the connector 142-3 to slide along a second direction D2, wherein the second direction D2 is not perpendicular to the first direction D1. For example, the acute angle between the second direction D2 and the first direction D1 is 87 degrees. That is, relative to the first trigger surface 142-11, the bottom surface of the sliding fitting portion 142-37 has a certain inclination angle. For example, relative to the first trigger surface 142-11, the inclination angle of the bottom surface of the sliding fitting portion 142-37 is in the range of (0,10] degrees. It can be understood that the reading of the inclination angle can be determined according to actual conditions, and this specification does not limit this. Specifically, the above-mentioned movable fitting portion 142-37 can be a groove-shaped structure for guiding the sliding connection portion 142-15'. Referring to Figure 18B, the first shell 110 may further include a sliding limit portion 115. Particularly, when the second trigger surface 142-13 is triggered, the sliding limit portion 115 is configured to limit the movement of the actuator 142-1 from the first shell 110 in the first direction D1.

[0186] In some embodiments, when the first trigger surface 142-11 is triggered, the actuator 142-1 drives the connecting member 142-3 to move in the first direction D1 via the aforementioned sliding connection. When the second trigger surface 142-13 is triggered, if the aforementioned sliding limiter 115 is not provided, the actuator 142-1 will slide relative to the connecting member 142-3 in the second direction D2. In this specification, when the second trigger surface 142-13 is triggered, the sliding limiter 115 restricts the actuator 142-1 from moving in the first direction D1 away from the tape 120, thereby allowing the actuator 142-1 to drive the connecting member 142-3 to move in the first direction D1 toward the tape 120. In other words, the actuator 142-1 can drive the connecting member 142-3 to move in the first direction D1 toward the tape 120. It can be seen that when any triggering surface of the actuator 142 - 1 is triggered, the connecting member 142 - 3 can move along the first direction D1 , thereby ensuring the control stability of the tape 120 .

[0187] Figures 19A and 19B respectively illustrate the structure of a brake component 144 according to an embodiment of the present application from different perspectives. The brake component 144 and the actuator 142 can be located on either side of the tape 120. Referring to Figures 19A and 19B , the brake component 144 can include a first brake body 144-1 and an elastic drive body 144-3. The first brake body 144-1 can include a connecting portion 144-11, a brake portion 144-13, and a control portion 144-15.

[0188] Referring to FIG19B , the elastic driving body 144-3 can be in a “V” shape, with one end connected to the first housing 110 and the other end connected to the first brake body 144-1. The elastic driving body 144-3 can also be a spiral spring, with one end fixed to the first housing 110 and the other end connected to the first brake body 144-1. In the case where the brake component 144 and the actuator component 142 are respectively located on both sides of the tape 120, if both triggering surfaces are not triggered, the elastic driving body 144-3 made of elastic material can cause the first brake body 144-1 to contact the tape 120 under the elastic force of the elastic driving body 144-3, thereby braking the tape 120.

[0189] In some embodiments, the first brake body 144-1 can be movably connected to the first housing 110. For example, referring to Figure 19A, the first brake body 144-1 is provided with a hole, which can achieve a rotational movable connection between the first brake body 144-1 and the first housing 110 through an axial connection. The first brake body 144-1 and the first housing 110 can also be movably connected in a sliding manner. For example, the first brake body 144-1 can be provided with a slot in the first housing 110, and the first brake body 144-1 can be a key that fits into the slot. Through the key slot, the first brake body 144-1 can slide similarly to the first housing 110. The connecting portion 144-11 can be made of a non-elastic material to ensure the flexibility of the movable connection. One end of the elastic driving body 144-3 can be connected to the first housing 110, and the other end can be connected to the first brake body 144-1. Specifically, when any triggering surface of the actuator 142-1 is triggered, the brake component 144 receives drive from the connecting member 142-3. Furthermore, since the connecting portion 144-11 of the braking component 144 is movably connected to the first shell 110 via an axial connection, and the elastic driving body 144-3 used to support the first braking body 144-1 is made of elastic material, the braking component 144 can release the tape 120 under the above drive.

[0190] In some embodiments, referring to FIG. 19A , the braking portion 144 - 13 and the connecting portion 144 - 11 may be fixedly connected (e.g., glued). When the trigger surface is not triggered, the braking portion 144 - 13 is supported by the elastic driving body 144 - 3 and is in contact with the tape 120. The friction between the braking portion 144 - 13 and the tape 120 can brake the tape 120.

[0191] In some embodiments, referring to Figures 19A and 19B, the control portion 144-15 can be fixed to the connecting portion 144-11. In the case where any triggering surface is triggered, the connecting member 142-3 moves along the first direction D1 under the drive of the actuator 142-1, and the driving portion 142-35 will contact the control portion 144-15 and transmit the driving force. Specifically, under the driving action of the driving portion 142-35, the control portion 144-15 will compress the elastic driving body 144-3 and then drive the first braking body 144-1 to move away from the ruler 120. As a result, the braking portion 144-13 and the ruler 120 gradually change from a contact state to a separation state. Then, the ruler 120 changes from a braking state to a non-braking state.

[0192] FIG20 illustrates a schematic structural diagram of a tape measure 100 according to one embodiment of the present application. Referring to FIG20 , the tape measure 100 includes a brake component as shown in FIG19A and FIG19B . A brake component 144 and an actuator 142 are located on either side of the tape 120. When neither the first trigger surface 142-11 nor the second trigger surface 142-13 is triggered, the brake component contacts the tape 120 to brake the tape 120. When either the first trigger surface 142-11 or the second trigger surface 142-13 is triggered, the actuator abuts against the brake component and drives the brake component away from the tape 120, releasing the tape 120. Specifically, when neither triggering surface of actuator 142-1 is triggered, first brake body 144-1, under the elastic force of elastic driving body 144-3, contacts tape 120. Friction between braking portion 144-13 and tape 120 brakes tape 120. Simultaneously, supported by elastic support portion 142-4, connector 142-3 remains out of contact with braking component 144, ensuring successful braking of tape 120. When either triggering surface of actuator 142-1 is triggered, connector 142-3, driven by actuator 142-1, moves in first direction D1. Drive portion 142-35 presses against control portion 144-15 of braking component 144, compressing elastic driving body 144-3 and driving first brake body 144-1 away from tape 120. As a result, the braking portion 144 - 13 and the tape 120 gradually change from a contact state to a separation state, and the tape 120 changes from a braking state to a non-braking state.

[0193] Figure 21 shows a schematic structural diagram of a brake assembly 140 according to another embodiment of the present application. This differs from the brake assembly 140 of the previous embodiment in that the connecting member 142-3 may comprise only a rotationally engaging portion 142-31 and a guide portion 142-33. The brake assembly includes a second brake body 144-5, as shown in Figure 21. The second brake body 144-5 is connected to the connecting member 142-3 and disposed between a set of guide portions 142-33.

[0194] Specifically, the braking component 144 and the actuator 142 are located on the same side of the tape 120. When neither triggering surface of the actuator 142-1 is triggered, the second braking body 144-5 connected to the connector 142-3, supported by the elastic support portion 142-4, is separated from the tape 120, meaning that the tape 120 is not braked. When either triggering surface of the actuator 142-1 is triggered, the connector 142-3, driven by the actuator 142-1, moves in the first direction D1. The second braking body 144-5 connected to the connector 142-3 moves toward the tape 120 and gradually abuts against it, thereby braking the tape 120.

[0195] Figure 22 shows a schematic structural diagram of a measuring device 1000 provided according to an embodiment of the present application. The measuring device 1000 may include the tape measure 100 provided in the above embodiment and a laser ranging device 200 connected to the tape measure 100. In some embodiments, the measuring device 1000 further includes a marking assembly (not shown in Figure 22). The above-mentioned tape measure 100 can be used for close-range measurement, for example, the distance within 5 meters can be measured by the tape 120 of the tape measure 100. The above-mentioned laser ranging device 200 can easily achieve long-distance measurement such as 100 meters by emitting a ranging laser, thereby compensating for the shortcoming that the tape measure 100 is not suitable for long-distance measurement. It can be seen that the measuring device 1000 provided in this specification has a wide range of application scenarios and is highly practical.

[0196] 23 shows an exploded view of a laser distance measuring device 200 according to an embodiment of the present application. The laser distance measuring device 200 may include a second housing 230 and a laser measuring portion 250. In some embodiments, a marking assembly 300 may be provided on the laser distance measuring device 200.

[0197] The second housing 230 may be a mounting base for the laser ranging device 200. A second outlet 231 may be provided on the second housing 230. The second outlet 231 may include a transmitting port 2311 and a receiving port 2312. The transmitting port 2311 and the receiving port 2312 may be arranged in parallel. The laser measuring unit 250 may be disposed within the second housing 230 and, during operation, may measure the distance in the second measurement direction through the second outlet 231. Specifically, the laser measuring unit 250 may include a transmitter 252 and a receiver 254. During operation, the transmitter 252 transmits a ranging laser through the transmitting port 2311 toward a target object / obstacle. The ranging laser is reflected back upon encountering the target object and passes through the receiving port 2312 to be received by the receiver 254. The distance between the target object and the measurement origin is determined by the time difference between the emission and reception of the ranging laser.

[0198] In some embodiments, the tape measure 100 and the laser distance measuring device 200 can be detachably connected to facilitate replacement of damaged components of either device. Specifically, the tape measure 100 can include a first connecting portion 180. The first connecting portion 180 can be connected to the first housing 110. The laser distance measuring device 200 can include a second connecting portion 240. The second connecting portion can be connected to the second housing 230. The tape measure 100 and the laser distance measuring device 200 are detachably connected via the first connecting portion 180 and the second connecting portion 240, allowing them to work together to achieve different distance measurement methods. These different distance measurement methods can include different directions and / or different ranges.

[0199] When the measuring directions of the tape measure 100 and the laser distance measuring device 200 are different, the tape measure 100 and the laser distance measuring device 200 can be used together to achieve measurements in different directions. When the measuring ranges of the tape measure 100 and the laser distance measuring device 200 are different, the tape measure 100 and the laser distance measuring device 200 can be used together to achieve measurements in different ranges. When the measuring directions of the tape measure 100 and the laser distance measuring device 200 are different and the measuring ranges are different, the tape measure 100 and the laser distance measuring device 200 can be used together to achieve measurements in different directions and different ranges.

[0200] Figures 24A to 24C illustrate schematic diagrams of different measurement directions when the measuring tape 100 is connected to the laser ranging device 200 according to some exemplary embodiments of the present application. As shown in Figures 24A to 24C , for ease of description, the measurement directions of the measuring tape 100 and the laser ranging device 200 are defined as follows. The measuring tape 100 can measure the distance in a first measurement direction V1 through the first outlet 114. The laser ranging device 200 can measure the distance in a second measurement direction V2 through the second outlet 231. The first measurement direction V1 and the second measurement direction V2 can be the same or different. The range of the first measurement direction V1 and the range of the second measurement direction V2 can be the same or different.

[0201] As shown in FIG24A , when the measuring tape 100 is connected to the laser distance measuring device 200, the first outlet 114 of the measuring tape 100 and the second outlet 231 of the laser distance measuring device 200 can be located on either side of the first connecting portion 180 and the second connecting portion 240. In this case, the first measuring direction V1 can be opposite to the second measuring direction V2.

[0202] As shown in FIG24B , when the measuring tape 100 is connected to the laser distance measuring device 200, the first outlet 114 of the measuring tape 100 and the second outlet 231 of the laser distance measuring device 200 can be located on the same side of the first connecting portion 180 and the second connecting portion 240. In this case, the first measuring direction V1 can be the same as the second measuring direction V2.

[0203] 24C , when the tape measure 100 is connected to the laser distance measuring device 200, the first outlet 114 of the tape measure 100 and the second outlet 231 of the laser distance measuring device 200 can be arranged perpendicularly. In this case, the first measuring direction V1 can be perpendicular to the second measuring direction V2.

[0204] It should be noted that the first measuring direction V1 and the second measuring direction V2 being identical, opposite, or perpendicular to each other may be substantially identical, opposite, or perpendicular to each other, or may be approximately identical, opposite, or perpendicular to each other. In other words, a certain degree of error is permissible. The magnitude of the error is related to the accuracy of the tape measure 100 and the laser distance measuring device 200.

[0205] It should be noted that Figures 24A to 24C illustrate only the relationship between the first measurement direction V1 and the second measurement direction V2. The relationship between the first measurement direction V1 and the second measurement direction V2 does not include only the three cases described above. The angle between the first measurement direction V1 and the second measurement direction V2 can be any angle, such as an acute angle, an obtuse angle, etc. For example, the angle between the first measurement direction V1 and the second measurement direction V2 can be 30°, 60°, 120°, or even other angles, and this specification does not limit this.

[0206] In some embodiments, the first connection portion 180 can be movably connected to the first housing 110, and / or the second connection portion 240 can be rotatably connected to the second housing 230. For example, the rotational connection allows the angle between the first measurement direction V1 and the second measurement direction V2 to be adjusted, thereby allowing the first measurement direction V1 and the second measurement direction V2 to form any angle, thereby meeting usage requirements and expanding usage scenarios. For example, the angle between the first measurement direction V1 and the second measurement direction V2 can be adjusted between 0-360 degrees. The rotational connection can be implemented in various ways, such as a damped hinge, a ratchet hinge, etc.

[0207] The detachable connection between the measuring tape 100 and the laser distance measuring device 200 is completed by connecting the first connecting portion 180 on the measuring tape 100 with the second connecting portion 240 on the laser distance measuring device 200.

[0208] Figure 25A shows a schematic structural diagram of the tape measure 100 shown in Figure 22 of the present application; Figure 25B shows an enlarged view of part A of the tape measure 100 shown in Figure 25A of the present application; Figure 26A shows a schematic structural diagram of the laser ranging device 200 shown in Figure 22 of the present application at a first viewing angle; Figure 26B shows a schematic structural diagram of the laser ranging module 200 shown in Figure 22 of the present application at a second viewing angle; Figure 26C shows an enlarged view of part B of the laser ranging module 200 shown in Figure 26B of the present application.

[0209] 25A to 26C , one of the first connection portion 180 and the second connection portion 240 may include a first connection mechanism 181, and the other may include a second connection mechanism 241. In some embodiments, one of the first connection portion 180 and the second connection portion 240 may further include a slot 242, and the other may further include a spring latch 182.

[0210] The second connecting mechanism 241 can be provided on the second connecting portion 240, and the first connecting mechanism 181 can be provided on the first connecting portion 180. Alternatively, the second connecting mechanism 241 can be provided on the first connecting portion 180, and the first connecting mechanism 181 can be provided on the second connecting portion 240. The latching slot 242 can be provided on the second connecting portion 240, and the spring latching point 182 can be provided on the first connecting portion 180. Alternatively, the latching slot 242 can be provided on the first connecting portion 180, and the spring latching point 182 can be provided on the second connecting portion 240. For ease of illustration, the following description will use the example of the second connecting mechanism 241 being provided on the second connecting portion 240, the first connecting mechanism 181 being provided on the first connecting portion 180, the latching slot 242 being provided on the second connecting portion 240, and the spring latching point 182 being provided on the first connecting portion 180. Those skilled in the art will appreciate that other embodiments are also within the scope of this specification.

[0211] The second connecting mechanism 241 can be a groove extending along the sliding direction. The first connecting mechanism 181 can be slidably connected along the second connecting mechanism 241 along the sliding direction. The second connecting mechanism 241 can match the first connecting mechanism 181. The matching can be that the shapes and sizes of the mating surfaces of the second connecting mechanism 241 and the first connecting mechanism 181 match. For example, the second connecting mechanism 241 can be a fixed connecting groove and the first connecting mechanism 181 can be a connecting boss. When the second connecting mechanism 241 is mated with the first connecting mechanism 181, the second connecting mechanism 241 acts as a guide, allowing the first connecting mechanism 181 to slide along the direction in which the second connecting mechanism 241 extends (i.e., the sliding direction). The cross-sectional shape of the second connecting mechanism 241 can be triangular, rectangular, dovetail, circular, etc. The direction in which the second connecting mechanism 241 extends can be any direction. The directions in which the second connecting mechanism 241 extends shown in Figures 25A to 26C are merely exemplary directions. Those skilled in the art should understand that when the direction in which the second connecting mechanism 241 extends is other directions, it is also within the scope of protection of this specification, such as the same direction as the first measuring direction V1, or any direction perpendicular to the first measuring direction V1, etc.

[0212] When the first connecting mechanism 181 slides along the second connecting mechanism 241 to a specified position, the spring locking point 182 can snap into the locking groove 242. The locking groove 242 and the spring locking point 182 are adapted to each other. This adaptation can mean that the shapes and dimensions of the mating surfaces of the spring locking point 182 and the slot 242 match. When the first connecting portion 180 and the second connecting portion 240 are connected, the first connecting mechanism 181 slides along the sliding direction to connect with the second connecting mechanism 241 until the spring locking point 182 snaps into the slot 242, thereby achieving a fixed connection between the first connecting portion 180 and the second connecting portion 240. The mating surfaces of the slot 242 and the spring locking point 182 are wedge-shaped in the sliding direction. For example, the mating surfaces of the slot 242 and the spring locking point 182 in the sliding direction are trumpet-shaped, so that when the first connecting part 180 and the second connecting part 240 are connected, the spring locking point 182 can be quickly and accurately locked into the slot 242 through the trumpet-shaped inclined surface, and when the first connecting part 180 and the second connecting part 240 are disassembled, the spring locking point 182 can be quickly and easily detached from the slot 242 through the trumpet-shaped inclined surface.

[0213] When the first connecting portion 180 and the second connecting portion 240 are connected, the first connecting mechanism 181 is engaged with the second connecting mechanism 241 and slides relative to the second connecting mechanism 241 in the sliding direction until it reaches a designated position, and the spring engaging point 182 engages in the engaging groove 242. When the first connecting portion 180 and the second connecting portion 240 are disassembled, when the second connecting portion 240 moves in the sliding direction under the action of an external force, pressure is applied to the spring engaging point 182 via the wedge-shaped surface, compressing the spring engaging point 182 and causing it to disengage from the engaging groove 242, thereby causing the first connecting portion 180 and the second connecting portion 240 to move relative to each other in the sliding direction until they disengage.

[0214] As previously mentioned, the tape measure 100 may be provided with an optical positioning assembly 140, an imaging sensor 132, and a position identification sensor 134 to read the length of the tape extended. The first controller 150 may calculate the distance measured by the tape measure 120, i.e., the first measurement data, based on the data detected by the optical positioning assembly 140. In this case, the first measurement data measured by the tape measure 100 needs to be output via an output assembly. The output assembly may be an output device and / or an output interface. The second measurement data measured by the laser distance measuring device 200 also needs to be output via the output assembly. In this case, the laser distance measuring device 200 may include a second controller. The second controller may be electrically connected to the laser distance measuring device 200 to generate the second measurement data measured by the laser distance measuring device 200.

[0215] When the tape measure 100 is connected to the laser distance measuring device 200, the tape measure 100 and the laser distance measuring device 200 can have their own independent output components, or they can share the same output component. When the tape measure 100 and the laser distance measuring device 200 share an output component, one of the tape measure 100 and the laser distance measuring device 200 can include the output component. In this case, when the tape measure 100 and the laser distance measuring device 200 are connected, the output component can output the first measurement data measured by the tape measure 100 and / or the second measurement data measured by the laser distance measuring device 200. As shown in Figure 26A, the output component 210 is provided on the laser distance measuring device 200 as an example. Those skilled in the art should understand that providing the output component 210 on the tape measure 100 is also within the scope of protection of this specification.

[0216] When the measuring tape 100 is connected to the laser distance measuring device 200, in order for the output component 210 to output both the first and second measurement data, the output component 210 must be electrically connected to both the first and second controllers 150 and 240 to receive the first and second measurement data from the first and second controllers. In this case, one of the first and second connecting portions 180 and 240 may further include a connector 184, and the other may further include a connector base 244. The connector base 244 may be located on the second connecting portion 240, with the connector 184 located on the first connecting portion 180. Alternatively, the connector base 244 may be located on the first connecting portion 180, with the connector 184 located on the second connecting portion 240. For ease of illustration, this description will use the example of a connector base 244 located on the second connecting portion 240 and a connector 184 located on the first connecting portion 180. Those skilled in the art will appreciate that other configurations are also within the scope of this specification.

[0217] One of the connector 184 and the connector socket 244 is electrically connected to the output assembly 210. The electrical connection can be direct or indirect, for example, through the first controller 150 or the second controller. For example, the one of the connector 184 and the connector socket 244 that is located on the same device as the output assembly 210 is electrically connected to the output assembly 210.

[0218] The connector 184 on the first connection portion 180 can be electrically connected to the first controller 150 for data transmission. The connection socket 244 on the second connection portion 240 can be electrically connected to the second controller for data transmission. The connector 184 and the connection socket 244 can be used for data transmission. When the connector 184 and the connection socket 244 are in contact, current flows through the connector 184 and the connection socket 244, allowing data in the connector 184 and the connection socket 244 to be transmitted to each other.

[0219] As shown in FIG26B , the connector 184 includes a connector base 1841 electrically connected to the first controller 150 and a plurality of evenly distributed wiring terminals 1842 disposed within the connector base 1841. As shown in FIG26C , the connector 244 includes a connector base 2441 electrically connected to the second controller and a plurality of evenly distributed metal probes 2442. When the first connecting portion 180 is connected to the second connecting portion 240, the metal probes 2442 contact the wiring terminals 1842 to achieve electrical connection. The metal probes 2442 can be elastically connected to the connecting base 2441. When the first connecting portion 180 is connected to the second connecting portion 240, the wiring terminals 1842 contact the metal probes 2442 and compress the elastic device of the metal probes 2442, so that the two are tightly fitted together to achieve electrical connection.

[0220] The connector 184 and the connection base 244 can be arranged at any position on the first connection portion 180 and the second connection portion 240. The connection between the connector 184 and the connection base 244 can be in any orientation. For example, the connector 184 and the connection base 244 can be connected in the sliding direction, in the first measurement direction V1, or in a direction perpendicular to the first measurement direction V1 and the sliding direction. When the first connection portion 180 and the second connection portion 240 are connected, the connector 184 and the connection base 244 are electrically connected, so that both the first controller 150 and the second controller can be electrically connected to the output component 210.

[0221] In some embodiments, to ensure reliable connection between the connector 184 and the connection base 244, one of the first connection portion 180 and the second connection portion 240 may further include a first positioning mechanism 183, and the other may further include a second positioning mechanism 243. The first positioning mechanism 183 and the second positioning mechanism 243 are respectively mounted with the connector 184 and the connection base 244. The first positioning mechanism 183 and the second positioning mechanism 243 are adapted to each other. For example, the first positioning mechanism 183 may be a positioning boss, and the second positioning mechanism 243 may be a positioning groove. When the tape measure 100 is connected to the laser distance measuring device 200, the first positioning mechanism 183 snaps into the second positioning mechanism 243. The first positioning mechanism 183 and the second positioning mechanism 243 may be arranged in the direction of connection between the connector 184 and the connection base 244. For example, the first positioning mechanism 183 and the second positioning mechanism 243 may be arranged in the sliding direction.

[0222] In some embodiments, the measuring device 1000 may further include a marking assembly 300. The marking assembly 300 may be mechanically connected to the measuring tape 100 and / or the laser ranging device 200. During operation, the marking assembly 300 may emit laser light along a marking plane toward a target surface, such that the laser illuminates a laser marking line on the target surface that passes through a reference point. The reference point may be a reference point used by the measuring tape 100 and / or the laser ranging device 200 for distance measurement. Figure 27 shows a schematic diagram of target points and reference points provided according to an embodiment of the present application.

[0223] Using the marking assembly 300, the user can measure the distance between two points along a specified direction. For example, the user may need to measure the distance d in the X direction between point A (target point) and point B (reference point) on wall surface P1 (target surface). If reference point B, the measurement starting point (i.e., origin O), is outside the X direction but within the length of the laser marking, the laser marking can reach reference point B. Therefore, the measurement origin O of the measuring device 1000 can be calibrated using reference point B. The distance d between reference point B and target point A along the X direction can then be accurately measured by measuring the distance between point O and point A. Target surface P1 can be the actual plane that the bottom of the measuring device 1000 contacts during measurement. Target surface P1 can also be a virtual plane determined by the user based on actual measurement needs during measurement. The reference point is located on target surface P1. The target point may or may not be located on target surface P1. During measurement, the target point can coincide with the measurement origin. During measurement, the X direction may be the first measurement direction V1 of the tape measure 100 or the second measurement direction V2 of the laser distance measuring device 200 .

[0224] The following describes the marking assembly 300 by taking the example of the marking assembly 300 being installed on the second shell 230 of the laser ranging device 200, the target point being located on the target surface P1, and the tape measure 100 being used for distance measurement (the reference point is the reference point when the tape measure 100 is measuring the distance / the bottom of the tape measure 100 contacts the target surface P1 during measurement).

[0225] Figure 28A shows a schematic diagram of the internal working principle of the marking assembly 300 according to an embodiment of the present application. Figure 28B shows a schematic diagram of the laser marking according to an embodiment of the present application.

[0226] The reticle assembly 300 may include a laser emitter 310 and a reflector 320 (shown in FIG. 28A ). In some embodiments, the reticle assembly 300 may further include a reticle adjustment assembly 330 (not shown in FIG. 28A and FIG. 28B ).

[0227] When in operation, laser emitter 310 can emit laser light toward reflector 320. Reflector 320 can include a reflective surface 321. Reflective surface 321 can be spaced apart from laser emitter 310. Reflective surface 321 receives laser light emitted by laser emitter 310 and reflects the laser light along reticle plane P2 so that the laser light covers the field of view. Reflective surface 321 of reflector 320 can include at least a portion of a conical surface. The conical surface can have a 90° angle so that all laser light reflected from the conical surface is on the same plane.

[0228] Reflective surface 321 of reflector 320 may include at least a portion of a conical surface. Reflective surface 321 may be a complete conical surface, as shown in FIG28A . When laser emitter 310 is in operation, it emits laser light onto the vertex of reflective surface 321. The laser light, under the action of the conical surface, forms an initial laser surface that diffuses 360° in all directions. If the cone angle of the reflective surface is 90°, the initial laser surface is a plane. As shown in FIG28B , due to the presence of target surface P1, after the laser light emitted by laser emitter 310 is reflected onto marking plane P2, a portion of the reflected laser light will be directed toward target surface P1, illuminating a laser marking line M on target surface P1. Because the laser light reflected from reflective surface 321 is 360°, there is a point on the laser surface where the laser light can reach an infinite distance from target surface P1, and thus the length of laser marking line M on target surface P1 is also infinite. The axis of the cone can be parallel to the target surface P1, and the laser is incident along the axis of the cone, so that the reticle plane P2 where the reflected laser is located is perpendicular to the target surface P1. The half-side field of view angle refers to any one of the two angles into which the field of view angle is divided by the laser passing through the origin. As shown in Figure 28B, the laser s passing through the origin on the reticle plane P2 can divide the 360° laser surface into two angles, namely θ a and θ b The half-viewing angle can be θ a and θ b The reflecting surface 321 may also be a partial conical surface. The specific application of the reflecting surface as a partial conical surface will be described in the following sections.

[0229] The field of view radiated by the laser refers to the area consisting of the laser light emitted to the outside of the measuring device 1000 after being reflected by the reflective surface 321. Figure 29A shows a schematic diagram of the partial structure of the measuring device 1000 provided according to an embodiment of the present application. Figure 29B shows a schematic diagram of the field of view of the laser light provided according to an embodiment of the present application. Figure 29A is illustrated using the example of a complete conical surface as the reflective surface 321 included in the reticle assembly 300. And for ease of description, the adjustment direction Y is defined as: the direction of the laser light perpendicular to the target surface P1 in the laser light on the reticle plane P2.

[0230] When the laser emitter 310 is operating, it irradiates the apex of the conical reflector 320 with laser light. Under the action of the conical surface, the laser light forms an initial laser surface that diffuses 360° in all directions. However, because the marking assembly 300 is mounted on the groove, part of the laser light in the laser surface will be blocked by the laser ranging device 200 and other structures and cannot be emitted outside the measuring device 1000. The remaining laser light will be emitted from both sides of the laser ranging device 200 to the outside of the measuring device 1000. The area composed of this portion of laser light is the field of view of the laser. As shown in Figure 29B, the angle corresponding to the field of view is the field of view angle, denoted as θ. Due to obstruction by other components, the field of view angle θ of the laser field of view is less than or equal to the angle of the initial laser surface. As shown in FIG29A , in the measuring device 1000 provided herein, a certain distance exists between the reflector 320 (not shown in FIG29A ) within the marking assembly 300 and the structure of the laser ranging device 200. Therefore, laser light in the lower half of the 360° laser plane, whose inclination angle relative to the adjustment direction Y is greater than a preset angle θ0, can be emitted outside the second housing 230. This allows the unobstructed laser light emitted from both sides of the laser ranging device 200 to have a total field of view angle greater than 180°. The preset angle θ0 can be the angle at which the laser light emitted from the measuring device 1000, after being tangent to the second housing 230 in the laser plane, deviates relative to the adjustment direction Y.

[0231] As shown in FIG29B , the reticle assembly 300 is positioned in the middle of the laser ranging device 200, allowing the laser to be emitted from both sides of the measuring device 1000 at the same angle. Consequently, the corresponding laser markings M projected onto the target surface P1 by the lasers on both sides are symmetrically distributed about the adjustment direction Y. When the laser light reflected from the conical surface is emitted from both sides of the measuring device 1000 along the reticle plane P2, and the field of view angle θ of the laser light is greater than or equal to 180°, it means that a laser beam in the reticle plane P2 is parallel to the target surface P1 and can be considered to be able to illuminate the target surface P1 at an infinite distance. Therefore, the laser marking M formed by all the laser light irradiating the target surface P1 is infinitely long, and the infinitely long laser marking M can reach a reference point at any position.

[0232] In some embodiments, the reticle assembly 300 may further include a reticle adjustment assembly 330. The reticle adjustment assembly 330 may be mechanically connected to the second housing 230 to adjust the length of the laser reticle on the target surface P1 by adjusting the field of view of the laser.

[0233] The marking line adjustment component 330 may include a light blocking member 331, such that the measuring device 1000 has at least a first mode and a second mode during operation. In the first mode, the light blocking member 331 is at a first position, and the field of view has a first field angle, such that the length of the laser marking line on the target surface P1 is a first length; in the second mode, the light blocking member 331 is at a second position, and the field of view has a second field angle, such that the length of the laser marking line on the target surface P1 is a second length. There are various ways to implement adjusting the length of the laser marking line by the light blocking member 331 blocking the laser. Examples are given below for illustration respectively:

[0234] The marking line adjustment component 330 may be designed as a rotary structure. The user can adjust the light blocking member 331 by rotation to adjust the degree of blocking the laser. FIG. 30 shows a schematic structural diagram of the light blocking member 331 provided according to an embodiment of the present application. The light blocking member 331 may be used as a light blocking surface to face the direction of laser emission to block the laser. The light blocking surface may include a first side S1 and a second side S2 (S2 < S1), and then block the laser by the first side S1 or the second side S2 by rotating around the axis b. Among them, the first side S1 is at a first distance Q1 from the axis b; the second side S2 is at a second distance Q2 from the axis b, and Q2 > Q1.

[0235] FIG. 31A shows a schematic diagram of the light blocking member 331 located at the first position and rotating to block light according to an embodiment of the present application. FIG. 31B shows a schematic diagram of the light blocking member 331 located at the second position and rotating to block light according to an embodiment of the present application.

[0236] As shown in FIG. 31A, when the light blocking member 331 rotates to the first position, the first side S1 faces the target surface P1 to block light, thereby determining the first field angle θ3. As shown in FIG. 31B, when the light blocking member 331 rotates to the second position, the second side S2 faces the target surface P1 to block light, thereby determining the second field angle θ4. Since the first distance Q1 < the second distance Q2, it means that when the measuring device 1000 is placed on the target surface P1, the second side S2 is closer to the target surface P1 than the first side S1. Therefore, the second side S2 will block more laser light near the laser surface, resulting in less laser light being able to be emitted, and the field of view of the laser will also be different, θ3 > θ4.

[0237] In some embodiments, the user can adjust the light blocking member 331 by sliding to adjust the degree of the light blocking member 331 blocking the laser. The light blocking member 331 may be slidably connected to the second housing 230 along the direction in which the laser is reflected, and the amount of laser blocking is adjusted by sliding the light blocking member 331 between the first position and the second position.

[0238] FIG32 is a schematic diagram showing the posture of the reticle adjustment assembly 330 in the first position according to an embodiment of the present application, wherein the target plane P1 is located above the reticle assembly 300 for the purpose of illustration.

[0239] The marking adjustment assembly 330 may include a bracket 333. The bracket 333 may be fixedly connected to the second housing 230. The light blocking member 331 is rotatably connected to the bracket 333, and the amount of laser blocking is adjusted by rotating along the axis b between the first position and the second position, thereby adjusting the field of view angle. The rotation range of the light blocking member 331 is limited by the structural design between the light blocking member 311 and the bracket 333. For example, the light blocking member 331 may include a limit groove 331-a. The limit groove 331-a may be on one side of the light blocking member 331, such as in the direction toward the outgoing laser. The shape of the limit groove 331-a may be arc-shaped and have a first end e1 and a second end e2. Correspondingly, the bracket 333 may include a limit block 333-a. The limit block 333-a may be in the limit groove 331-a and slidably connected to the limit groove 331-a.

[0240] When the limit block 333-a slides along the limit groove 331-a to the first end e1 and abuts against the first end e1, the light blocking member 331 rotates to the first position, and the limit block 333-a prevents the light blocking member 331 from rotating further. The first side S1 of the light blocking member 331 blocks light toward the target surface P1, and the field of view angle of the laser field of view is the first field of view angle. When the limit block 333-a slides along the limit groove 331-a to the second end e2 and abuts against the second end e2, the light blocking member 331 rotates to the second position, and the limit block 333-a prevents the light blocking member 331 from rotating further. The second side S2 of the light blocking member 331 blocks light toward the target surface P1, and the field of view angle of the laser field of view is the second field of view angle.

[0241] When both left and right light blocks 331 are in the first position, measuring device 1000 is in the first mode. Only the laser beam aligned with or closer to target surface P1 can project a laser marking onto target surface P1, forming a first field of view of 180°. The half-field of view angles corresponding to the left and right light blocks 331 are both 90°.

[0242] When both left and right light blocks 331 are in the second position, the measuring device 1000 is in the second mode. At this point, the second side S2 of the light blocker 331 is closer to the target plane P1 relative to the cone vertex of the reflector 320. Second side S2 is higher than the second housing 230, so the light blocker 331 blocks any reflected laser light that is tilted less than 15° relative to the target plane P1, resulting in a second field of view of 150°. The half-field of view angles corresponding to both left and right light blocks 331 are 75°.

[0243] By the same token, when the left light blocking member 331 is in the first position and the right light blocking member 331 is in the second position, the measuring device 1000 is in the third mode, and the corresponding third field of view angle is 165°, wherein the left half field of view angle is 90°, and the corresponding laser marking line is infinitely long, and the right half field of view angle is 75°, and the corresponding laser marking line is finite in length.

[0244] When the left light blocking member 331 is in the second position and the right light blocking member 331 is in the first position, the measuring device 1000 is in the fourth mode, and the corresponding fourth field of view angle is 165°, wherein the left half field of view angle is 75°, and the corresponding laser marking line has a limited length, and the right half field of view angle is 90°, and the corresponding laser marking line has an infinite length.

[0245] In some embodiments, the outer edge of the light-blocking surface may be in the form of an involute to continuously adjust the amount of laser light blocked. The light-blocking member 331 may also have a discontinuously variable amount of laser light blocked.

[0246] In order to ensure that the laser marking line can reach a reference point at any position, in addition to the above solution, the laser marking line emitted by the marking assembly 300 to the target surface P1 can also be set to have an adjustable length.

[0247] Figure 33A shows a pose diagram of the reflector 320 according to an embodiment of the present application. Figure 33B shows a pose diagram of the reflector 320 after rotation according to an embodiment of the present application. The reflector 320 is rotatably mounted within the second housing 230. Rotating the reflector 320 can reflect the laser light in a corresponding direction, thereby adjusting the orientation of the laser's field of view and, therefore, the length of the laser marking on the target surface P1.

[0248] For ease of description, the left (L) and right (R) directions of reflector 320 are defined as the direction indicated by the vertex of conical reflective surface 321 in measuring device 1000. Reflective surface 321 can also be a partial conical surface. The laser beam, acting on the partial conical surface, forms an initial laser beam surface that diffuses in all directions at an angle θ5. θ5 is less than 180°. For this description, the field of view is generally oriented toward target surface P1.

[0249] The initial position of reflector 320 is shown in Figure 33A , and the length of the laser marking on target surface P1 is L3. Following the direction of the incident laser on reflector 320, the position after the user rotates reflector 320 counterclockwise is shown in Figure 33B . At this point, compared to Figure 33A , the length of the laser marking on target surface P1 changes from L3 to L4, and the position has moved to the left. As can be seen from the figure, the laser marking before rotation in Figure 33A does not reach the reference point Ref on the left side (L) of reflector 320. However, by rotating reflector 320 counterclockwise in the direction of the arrow in the figure (Figure 33B), the length of the laser marking on the right side (R) of reflector 320 becomes shorter, while the length on the left side (L) becomes longer. Finally, the length of the laser marking on the left side (L) emitted by reflector 320 after rotation is long enough to pass through reference point Ref. During this process, the field of view angle θ5 does not change. Therefore, there is no need to limit the field of view angle of the laser light that can be reflected by reflector 320. By rotating reflector 320, the laser marking line can be guaranteed to pass through the reference point Ref at any position. Similarly, when the laser marking line of reflector 320 needs to be able to reach the reference point located on the right side (R) of reflector 320, reflector 320 can be rotated clockwise (in the direction opposite to the arrow) to shorten the length of the laser marking line on the left side (L) of reflector 320 and lengthen the length of the laser marking line on the right side (R) of reflector 320 to pass through the reference point.

[0250] The foregoing description of this specification describes specific embodiments. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the particular order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0251] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented by way of example only and may not be limiting. Although not expressly stated herein, those skilled in the art will understand that this specification encompasses various reasonable changes, improvements, and modifications to the embodiments. Such changes, improvements, and modifications are intended to be suggested by this specification and are within the spirit and scope of the exemplary embodiments of this specification.

[0252] Furthermore, certain terms in this specification have been used to describe embodiments of this specification. For example, “one embodiment,” “an embodiment,” and / or “some embodiments” mean that a particular feature, structure, or characteristic described in connection with that embodiment may be included in at least one embodiment of this specification. Therefore, it is emphasized and should be understood that two or more references to “an embodiment,” “one embodiment,” or “an alternative embodiment” in various parts of this specification do not necessarily refer to the same embodiment. Furthermore, particular features, structures, or characteristics may be appropriately combined in one or more embodiments of this specification.

[0253] It should be understood that in the foregoing descriptions of the embodiments of this specification, to facilitate understanding of a feature and to simplify this specification, various features are combined in a single embodiment, figure, or description thereof. However, this does not necessarily mean that these features are combined. When reading this specification, those skilled in the art may extract some of the features and understand them as separate embodiments. In other words, the embodiments of this specification can also be understood as the integration of multiple sub-embodiments. This also applies when each sub-embodiment contains fewer than all the features of a single previously disclosed embodiment.

[0254] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, articles, etc., cited herein is hereby incorporated by reference in its entirety for all purposes, except for any prosecution document history related thereto, any equivalent that may be inconsistent or conflicting with this document, or any equivalent prosecution document history that may have a limiting effect on the broadest scope of the claims now or hereafter associated with this document. For example, if there is any inconsistency or conflict between the description, definition, and / or use of terms associated with any incorporated material and the terminology, description, definition, and / or use associated with this document, the terminology in this document shall control.

[0255] Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of this specification. Other modified embodiments are also within the scope of this specification. Therefore, the embodiments disclosed in this specification are merely examples and not limitations. Those skilled in the art can adopt alternative configurations based on the embodiments in this specification to implement the application in this specification. Therefore, the embodiments of this specification are not limited to the embodiments precisely described in the application.

Claims

1. A tape measure, characterized in that: The measuring tape comprises: A first shell is provided with a first outlet; A tape ruler, one end of which is installed in the first housing, the other end of which passes through the first outlet and extends out of the first housing, and is movable in a first measuring direction relative to the first housing; An optical positioning assembly, mechanically connected to the first housing, comprises: an imaging sensor, installed in the first housing and arranged opposite to the surface of the tape, and continuously collecting images of the tape in the process of movement during operation, and determining in real time the relative displacement of the tape in the first measuring direction by performing feature comparison on the images; and The first controller is connected to the imaging sensor for receiving the relative displacement and determining the length of the ruler extending out of the first housing in real time according to the relative displacement.

2. The tape measure according to claim 1, characterized in that The surface of the tape is provided with corresponding position marks at a plurality of preset positions; The optical positioning assembly further includes a position identification sensor, which is disposed in the first housing and is disposed opposite to a side of the ruler having the position mark. The position identification sensor is in communication connection with the first controller, and reads the position mark of the ruler passing through the position identification sensor during movement to generate a corresponding absolute position signal, and sends the signal to the first controller. The first controller also performs the following operations: receiving the absolute position signal, Based on the absolute position signal, determining an absolute length corresponding to the absolute position signal, and Based on the absolute position signal, the relative length obtained by accumulating the received relative displacement is cleared, and the length of the ruler tape extending out of the first housing is determined according to the relative displacement and the absolute length received after the clearing.

3. The tape measure according to claim 2, characterized in that: The surface roughness of the side of the tape facing the imaging sensor is within the recognition range of the imaging sensor; and / or The tape measure also includes a first distance member and / or a second distance member, the first distance member is arranged in the first shell, and is configured to keep the distance between the imaging sensor and the tape within a first working range when the imaging sensor is working, and the second distance member is arranged in the first shell, and is configured to keep the distance between the position identification sensor and the tape within a second working range when the position identification sensor is working.

4. The tape measure according to any one of claims 1 to 3, wherein the imaging sensor comprises: An imaging component is configured to capture images at a preset frequency to continuously capture images of the tape during movement, wherein the preset frequency causes images captured by the imaging sensor at adjacent time points to at least partially overlap, an image processing circuit, the image processing circuit being in communication with the imaging component and configured to determine in real time the relative displacement of the tape in the first measuring direction by performing feature comparison on the image, and A light source is disposed on the same side of the tape as the imaging component and is configured to emit light toward the tape.

5. The measuring tape according to any one of claims 1 to 4, characterized in that: The measuring tape further comprises a brake assembly mounted on the first housing, the brake assembly comprising: a braking component, installed in the first housing and capable of contacting or separating from the tape ruler to brake or release the tape ruler; and an actuator, mounted on the first housing, comprising a first trigger surface and a second trigger surface, wherein the first trigger surface and the second trigger surface receive trigger forces from different directions respectively, and when either the first trigger surface or the second trigger surface is triggered, the actuator drives the brake component to contact or separate from the tape. Wherein, the second trigger surface is inclined relative to the first trigger surface toward the direction close to the tape, and the inclination has an angle.

6. The measuring tape according to claim 5, characterized in that: The execution component comprises: an actuator, comprising the first trigger surface and the second trigger surface; and a connecting member, movably mounted in the first housing and capable of moving in a first direction relative to the first housing to drive the braking component, The actuator is movably connected to the connecting member, and when either the first trigger surface or the second trigger surface is triggered, the actuator drives the connecting member to move along the first direction to drive the braking component.

7. The tape measure according to claim 6, characterized in that The execution body also includes: a rotation connection portion, rotationally connected to the connection member, wherein a rotation center of the rotation connection is arranged opposite to the first trigger surface and eccentrically arranged to the second trigger surface; and The rotation limiting portion is configured to limit the rotation angle of the actuator relative to the connecting member, When the first trigger surface is triggered, the actuator drives the connecting member to move along the first direction through the rotating connection; when the second trigger surface is triggered, the actuator rotates relative to the connecting member, and the rotating limit portion limits the rotation of the actuator, so that the actuator drives the connecting member to move along the first direction.

8. The tape measure according to claim 7, characterized in that: The second trigger surface is located at one end of the first trigger surface, the rotation limiting portion is located at one end of the first trigger surface away from the second trigger surface, and the rotation connecting portion is located between the second trigger surface and the rotation limiting portion. The first housing includes a limit block, which is located on a side of the actuator away from the connecting member and is arranged opposite to the rotation limit portion. When the second trigger surface is triggered, the actuator rotates relative to the connecting member, and the limit block abuts against the rotation limit portion to limit the rotation of the actuator, so that the actuator drives the connecting member to move along the first direction through the rotation connection portion.

9. The measuring tape according to any one of claims 6 to 8, characterized in that: The actuator is slidably connected to the connecting member along a second direction, and the second direction is not perpendicular to the first direction. The first housing includes a sliding limiter configured to limit movement of the actuator away from the first housing in the first direction. Wherein, when the first trigger surface is triggered, the actuator drives the connecting member to move along the first direction through the sliding connection, and when the second trigger surface is triggered, the actuator slides relative to the connecting member along the second direction, and the actuator cannot move relative to the first housing along the first direction under the limitation of the sliding limiting portion, so that the actuator drives the connecting member to move along the first direction; and / or The connecting member includes a guide portion, which is arranged along the first direction and is slidably connected to the first shell along the first direction.

10. The measuring tape according to any one of claims 5 to 9, characterized in that: The actuator and the brake component are respectively located on both sides of the tape. When the first trigger surface and the second trigger surface are not triggered, the brake component contacts the tape to brake the tape. When either the first trigger surface or the second trigger surface is triggered, the actuator abuts against the brake component and drives the brake component to separate from the tape to release the tape. The brake component includes: a first braking body, movably connected to the first housing, and An elastic driving body, one end of which is connected to the first housing, and the other end of which is connected to the first braking body, so that the first braking body contacts the tape under the elastic force of the elastic driving body to brake the tape. Wherein, when any one of the first triggering surface and the second triggering surface is triggered, the execution component abuts against the first braking body and compresses the elastic driving body to drive the first braking body to separate from the tape to release the tape; or The actuator and the brake component are located on the same side of the tape. When the first trigger surface and the second trigger surface are not triggered, the brake component is separated from the tape to release the brake on the tape. When any one of the trigger surface and the second trigger surface is triggered, the actuator abuts against the braking component and drives the braking component to contact the tape to achieve braking of the tape, wherein the braking component includes a second braking body, and the second braking body is connected to the actuator, When any one of the first triggering surface and the second triggering surface is triggered, the actuator drives the second braking body to move, so as to drive the second braking body to contact the tape ruler, thereby braking the tape ruler.

11. A measuring device, characterized in that: The measuring device comprises: The measuring tape of claim 1; and A laser distance measuring device is connected to the measuring tape, and the laser distance measuring device comprises: The second shell is provided with a second outlet, The laser measuring unit is arranged in the second shell and measures the distance in the second measuring direction through the second outlet during operation.

12. The measuring device according to claim 11, characterized in that The tape measure further includes a first connecting portion, wherein the first connecting portion is connected to the first housing. The laser distance measuring device further includes a second connecting portion, wherein the second connecting portion is connected to the second housing. The first connection part and the second connection part are detachably connected so that the tape measure and the laser distance measuring device cooperate to achieve different modes of distance measurement, and the different modes include different directions and / or different ranges.

13. The measuring device according to claim 12, characterized in that The first outlet and the second outlet are located on the same side of the first connecting portion, and the first measuring direction is the same as the second measuring direction, or The first outlet and the second outlet are located on both sides of the first connecting portion, and the first measuring direction is opposite to the second measuring direction, or The first outlet is perpendicular to the second outlet, the first measuring direction is perpendicular to the second measuring direction, or The first connection portion is rotatably connected to the first shell, and / or the second connection portion is rotatably connected to the second shell, so that the angle between the first measuring direction and the second measuring direction can be adjusted.

14. The measuring device according to any one of claims 12 to 13, characterized in that: One of the first connection part and the second connection part includes a first connection mechanism, and the other includes a second connection mechanism, wherein the first connection mechanism matches the second connection mechanism. One of the first connection part and the second connection part further includes a slot, and the other further includes a spring clamping point. When the first connection part and the second connection part are connected, the first connection mechanism is slidably connected with the second connection mechanism along a sliding direction until the spring clamping point is clamped into the clamping groove to achieve a fixed connection between the first connection part and the second connection part.

15. The measuring device according to any one of claims 12 to 14, characterized in that: The measuring device further comprises a marking assembly, which is mechanically connected to the measuring tape and / or the laser distance measuring device, and emits laser light along the marking plane toward the target surface during operation, so that the laser irradiates a laser marking line passing through a reference point on the target surface, wherein the reference point comprises a reference point when the measuring tape and / or the laser distance measuring device is measuring distance. Wherein, the marking assembly includes a marking adjustment assembly to adjust the length of the laser marking on the target surface.

16. The measuring device according to claim 15, characterized in that The marking assembly comprises: A laser transmitter, which transmits the laser toward the reflective surface when in operation; and A reflector is rotatably mounted on the tape measure and / or the laser distance measuring device, wherein the reflector includes the reflective surface and is configured to reflect the laser along the marking plane so that the laser is irradiated onto the target surface to form the laser marking line. Wherein, when the reflector rotates, the laser is reflected in a corresponding direction to adjust the direction of the field of view of the laser, thereby adjusting the length of the laser marking line on the target surface.

17. The measuring device according to any one of claims 15 to 16, characterized in that: The marking line adjustment component adjusts the length of the laser marking line on the target surface by adjusting the field of view angle of the laser. The marking adjustment assembly includes a light blocking member, and the measuring device has at least a first mode and a second mode when in operation. In the first mode, the light blocking member is in a first position, the field of view has a first field of view angle, so that the length of the laser marking line on the target surface is a first length, and In the second mode, the light blocking member is in a second position, the field of view has a second field of view angle, and the length of the laser marking line on the target surface is a second length.

18. A measurement method, characterized in that: Applied to the tape measure of claim 1, the measuring method comprises: The imaging sensor continuously collects images of the tape ruler during its movement, and determines in real time the relative displacement of the tape ruler in the first measuring direction by performing feature comparison on the images; and The first controller receives the relative displacement and determines the length of the ruler tape extending out of the first housing in real time according to the relative displacement.

19. The measuring method according to claim 18, characterized in that: The step of determining the relative displacement of the tape in the first measuring direction in real time by performing feature comparison on the image includes performing the following operations on each frame of the image: Compare the features of the current frame image with the adjacent previous frame image to determine the target feature points with the same features in the two frames of images, and Determine, based on a first position of the target feature point in the current frame image and a second position of the target feature point in the previous frame image, a relative displacement of the tape in the current frame image relative to the previous frame image in the first measurement direction; The step of determining the length of the ruler tape extending out of the first housing in real time according to the relative displacement includes: Adding the relative displacement corresponding to the current frame image to the relative length corresponding to the previous frame image to obtain the relative length corresponding to the current frame image, and The pre-stored initial length of the ruler tape extending out of the first housing is added to the relative length corresponding to the current frame image in real time to obtain the length of the ruler tape extending out of the first housing in real time.

20. The measuring method according to claim 19, characterized in that: The surface of the tape is provided with corresponding position marks at a plurality of preset positions, the optical positioning assembly further includes a position identification sensor which is communicatively connected with the first controller, and the method further includes: The position identification sensor reads the position mark of the tape passing through the position identification sensor during movement, and generates a corresponding absolute position signal and sends it to the first controller, and The first controller receives the absolute position signal, and clears the relative length obtained by accumulating the received relative displacement based on the absolute position signal; The step of determining the length of the ruler tape extending out of the first housing in real time according to the relative displacement includes: identifying an absolute length corresponding to the absolute position signal based on the absolute position signal; and The absolute length is accumulated in real time with the relative displacement received after being reset to obtain the length of the ruler tape extending out of the first housing in real time.

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