Optical distance measuring device with automatic calibration function and measuring method thereof

Abstract

The invention relates to an optical distance measuring device with an automatic calibration function and a measuring method thereof, and relates to the technical field of measuring devices.The optical distance measuring device comprises a base, a calibration piece is arranged on the base, a liftable supporting plate is arranged above the base, and a laser range finder and a measuring plate which are opposite to each other are arranged on the supporting plate; the device further comprises a probe assembly, a moving assembly, a follow-up air injection assembly and a follow-up marking assembly, the follow-up marking assembly is connected to the probe assembly, and the probe assembly makes contact with and extrudes the measuring face, so that the follow-up marking assembly automatically marks the uneven position of the surface. When the uneven position is detected, the marking coating is sprayed out of the annular spraying pipe by extruding the second air bag, the uneven position is marked in real time, marking is convenient and rapid, the time and energy of manual marking are saved, the uneven position which is automatically marked is convenient for workers to directly observe, and the efficiency of follow-up repairing or processing work is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring devices, and in particular to an optical distance measuring device with an automatic calibration function and a measuring method thereof. Background Art

[0002] When inspecting the flatness of surfaces like workpieces and building walls, traditional laser ranging devices typically emit laser light directly at the surface being measured. This is affected by factors such as surface material variations (such as reflectivity and roughness), ambient light interference, and surface attachments (such as dust and oil), causing the reflected laser signal to attenuate or scatter, leading to increased measurement errors. For example, if the surface being measured has depressions or protrusions, the incident angle of the laser beam changes, and the intensity and path deviation of the reflected signal may exceed the range of the rangefinder, resulting in misjudgment.

[0003] After searching, a distance measuring device is disclosed in Chinese patent application number: 202010972560.9, in which a moving part is moved, one end of the probe is abutted against the wall, and a laser rangefinder is used to measure the distance to the moving part. By abutting the probe against different positions of the wall, the flatness of the wall can be effectively detected. However, in actual use, after detecting that the surface is uneven, it is necessary to manually record the position or mark it afterwards, which is prone to problems such as missing marks and position deviation. Secondly, dust adheres to the laser reflection surface, which directly affects the laser reflection efficiency. It is currently required to be manually wiped regularly, which not only interrupts the measurement process, but may also cause inaccurate continuous measurement data due to untimely cleaning. Based on this, an optical distance measuring device with automatic calibration function and a measurement method thereof are proposed. Summary of the Invention

[0004] In order to overcome the problems existing in the related art, the present invention provides an optical distance measuring device with automatic calibration function and a measurement method thereof. When an unevenness is detected, the marking paint is sprayed out from the annular spray tube by squeezing the second airbag, thereby marking the uneven position in real time. The marking is convenient and quick, saving the time and energy of manual marking, and can effectively reduce human deviation.

[0005] To achieve the above objectives, the present invention provides, on one hand, an optical distance measuring device with an automatic calibration function, comprising a movable base on which a calibration member is provided, a liftable support plate provided above the base, on which a laser rangefinder and a measuring plate are provided facing each other, and further comprising: a probe assembly, disposed near one end of the measuring plate and configured to contact a surface to be measured; A moving assembly, connecting the probe assembly and the support plate, for causing the probe assembly to move in the X direction, the Y direction, and the rotational direction. The measuring plate is connected to the moving assembly and can be displaced synchronously with the X-direction movement of the probe assembly. A follow-up marking assembly is connected to the probe assembly, and the probe assembly contacts and squeezes the measuring surface, so that the follow-up marking assembly automatically marks the unevenness of the surface; The follow-up jet assembly is connected to the probe assembly and the measuring plate. When the probe assembly presses the measuring surface, the follow-up jet assembly moves synchronously to spray air flow toward the reflecting surface of the measuring plate for cleaning.

[0006] Preferably, the probe assembly comprises: An outer cylinder having an ejector pin disposed therein; A pressure sensor is installed at an end of the outer cylinder away from the measured surface; One end of the first elastic member is fixed to the inner wall of the outer cylinder, and the other end is fixedly connected to the outer wall of the ejector pin.

[0007] Preferably, the probe assembly further comprises: A groove is formed at an end of the ejector pin away from the surface to be measured; The piston is arranged in the groove, and a pressure column is connected to the side of the piston facing the pressure sensor.

[0008] Preferably, the follow-up marking assembly includes: An annular spraying pipe is fixed to one end of the outer cylinder close to the surface to be measured; a second airbag, disposed in the groove and adjacent to the piston, the second airbag being connected to a feeding tube; The feeding pipe is connected between the annular spraying pipe and the second air bag.

[0009] Preferably, the follow-up air injection assembly includes: a first airbag, disposed in the groove and compressed by a piston; An air jet pipe is fixed to the top of the front side of the measuring plate, and the air jet pipe is provided with a plurality of nozzles facing the reflective surface of the measuring plate; The air outlet hose is connected between the air jet pipe and the first air bag.

[0010] Preferably, rigid plates are fixed to both ends of the first airbag, a second elastic member is provided between the two rigid plates, and the piston is connected to adjacent rigid plates via a connecting rod.

[0011] Preferably, the moving component includes: a third telescopic rod, mounted on the support plate via a mounting base; A connecting block connected to the output end of the third telescopic rod, with a motor bracket fixed on the top of the connecting block; a motor, mounted in the motor bracket; a vertical frame fixedly connected to the output end of the motor; The fourth telescopic rod is vertically arranged in the vertical frame, and the top end of the fourth telescopic rod is fixedly connected to the outer wall of the outer cylinder.

[0012] Preferably, the calibration piece includes: a level detection device, arranged on the upper end surface of the base; A first telescopic rod, wherein each movable wheel at the bottom of the base is configured with an independent first telescopic rod.

[0013] Preferably, a second telescopic rod is provided between the base and the supporting plate, and a telescopic guide rod is provided at the corner of the base and the supporting plate.

[0014] Another aspect of the present invention provides an optical distance measurement method, which uses the above-mentioned optical distance measurement device with automatic calibration function, including the following steps: S1. Automatic calibration: Use the calibration piece to detect and adjust the levelness of the base, and adjust the support plate to the predetermined height; S2, probe positioning: using the mobile assembly to drive the probe assembly to the measurement starting position; S3, contact measurement: control the probe assembly to move until it contacts the surface to be measured, and monitor the contact pressure through the pressure sensor; S4, data acquisition: The laser rangefinder transmits laser to the measuring board, collects reflected light signals and calculates distance data; S5. Surface treatment: During the contact measurement process, the follow-up jet assembly cleans the reflective surface of the measuring plate synchronously, and the follow-up marking assembly marks the uneven surface.

[0015] The technical solution provided by the present invention can have the following beneficial effects: 1. In the present invention, a follow-up marking component is provided, and the follow-up marking component works with the probe component. When an unevenness is detected, the marking paint is sprayed out from the annular spray pipe by squeezing the second airbag, and the uneven position is marked in real time. The marking is convenient and quick, saving the time and energy of manual marking, and can effectively reduce human deviation. Secondly, the automatically marked unevenness is convenient for the staff to observe directly, without the need to additionally record the measurement position, thereby improving the efficiency of subsequent repair or processing work.

[0016] 2. In the present invention, the follow-up air jet assembly moves synchronously when the probe squeezes the measuring surface. The piston squeezes the first air bag, and the gas is blown through the nozzle of the air jet pipe to clear the dust on the reflective surface of the measuring plate, preventing dust from blocking or scattering the laser, thereby ensuring the accuracy of laser ranging; Uneven areas require further squeezing, which results in more purge gas and more thorough cleaning. Cleaning is automatically triggered before each measurement, forming a stable pre-cleaning mechanism to further improve the reliability of measurement data.

[0017] 3. In the present invention, all components are tightly connected. For example, the guide block and the guide groove in the moving assembly cooperate to improve the movement stability of the motor bracket. The guide strip on the outer wall of the ejector pin cooperates with the guide groove on the inner wall of the outer cylinder pin to ensure the linearity of the ejector pin movement, thereby ensuring a smooth operation process and reducing the impact of shaking or offset on measurement.

[0018] 4. In the present invention, the horizontal state of the device can be automatically detected and adjusted by cooperating with the level detection device and the independent first telescopic rod at the bottom of the base. When the base is tilted, the controller accurately controls the extension and retraction of the first telescopic rod of the corresponding moving wheel according to the tilt data, and quickly adjusts the base to the horizontal state, providing a stable reference for measurement and avoiding measurement errors caused by the tilt of the device.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This invention Figure 1 Schematic diagram of the overall structure from another perspective; Figure 3 It is a schematic structural diagram of the measuring plate, probe assembly, moving assembly and follow-up jet assembly of the present invention; Figure 4 This is a schematic structural diagram of another aspect of the measuring plate, probe assembly, moving assembly and follow-up jet assembly of the present invention; Figure 5 It is a schematic structural diagram of the probe assembly and the follow-up jet assembly of the present invention; Figure 6 It is a schematic structural diagram of the probe assembly of the present invention in a cross-sectional view of the outer cylinder; Figure 7 It is a schematic structural diagram of the probe assembly of the present invention in a cross-sectional view of the outer cylinder and ejector pin; Figure 8 It is a structural schematic diagram of the follow-up marking assembly of the present invention; Figure 9 It is a cross-sectional view of the first airbag of the present invention.

[0022] The corresponding relationship between the illustration labels and component names in the figure is as follows: 1. Base; 2. Calibration component; 21. Level detection device; 22. First telescopic rod; 3. Support plate; 31. Second telescopic rod; 32. Telescopic guide rod; 4. Laser rangefinder; 5. Measuring plate; 6. Probe assembly; 61. Outer cylinder; 62. Ejector pin; 621. Groove; 63. Pressure sensor; 64. Pressure column; 65. First elastic member; 66. Piston; 67. Connecting rod; 7. Mobile assembly; 71. Third telescopic rod; 72. Motor bracket; 73. Connecting block; 74. Motor; 75. Mullion; 76. Fourth telescopic rod; 8. Follow-up jet assembly; 81. Air outlet hose; 82. Jet pipe; 83. First airbag; 831. Rigid plate; 832. Second elastic member; 9. Follow-up marking assembly; 91. Annular spraying pipe; 92. Feeding pipe; 93. Second air bag; 94. Feeding pipe. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary persons in this field without making creative work are within the scope of protection of the present invention. The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described here. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to be able to fully convey the scope of the present invention to those skilled in the art.

[0024] The technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] Example 1:

[0026] See Figures 1-8As shown, the present invention provides an optical distance measuring device with an automatic calibration function, comprising a base 1, wherein a plurality of movable wheels are mounted at the bottom end of the base 1. To ensure the stability of the device during measurement, at least one movable wheel is equipped with a locking structure, which can effectively prevent the device from displacement during the measurement process after locking. A calibration component 2 is provided on the base 1, wherein the calibration component 2 includes a level detection device 21 and a first telescopic rod 22. The level detection device 21 is provided on the upper end surface of the base 1, and the level detection device 21 can be a spirit level. Each movable wheel at the bottom of the base 1 is equipped with an independent first telescopic rod 22, which is a high-precision electric telescopic rod. The first telescopic rod 22 cooperates with the level detection device 21 provided on the upper end surface of the base 1 to achieve automatic level calibration of the device. When the spirit level detects that the base 1 is in a non-level state, it transmits a signal to a controller (not shown). The controller controls the first telescopic rod 22 of the corresponding movable wheel to perform telescopic adjustment according to the tilt data. By accurately changing the height of the movable wheels at different positions, the base 1 is quickly adjusted to a level state, providing a stable level reference for subsequent measurements.

[0027] In addition, a liftable support plate 3 is provided above the base 1, and specifically, a second telescopic rod 31 is provided between the base 1 and the support plate 3. The second telescopic rod 31 adopts an electric telescopic rod or a hydraulic rod, which can provide sufficient power for the lifting of the support plate 3; at the same time, a telescopic guide rod 32 is provided at the corner of the base 1 and the support plate 3, which can be retracted and extended with the lifting of the support plate 3 to play a guiding and stabilizing role, ensuring that the support plate 3 always remains stable during the lifting process to avoid shaking or deviation. The extension and retraction of the second telescopic rod 31 can drive the support plate 3 to rise and fall to a suitable measuring height to adapt to measured surfaces of different heights. A relative laser rangefinder 4 and a measuring plate 5 are provided on the support plate 3. The laser rangefinder 4 is used to emit a laser beam. The side of the measuring plate 5 facing the laser rangefinder 4 is smooth and flat, which can efficiently reflect the laser to ensure the accuracy of the laser ranging. The optical rangefinder 4 cooperates with the measuring plate 5 to provide distance reference data for measurement. It also includes a probe assembly 6, a moving assembly 7 and a follow-up marking assembly 9. The probe assembly 6 is arranged at one end close to the measuring plate 5 and is used to contact the surface to be measured. The moving assembly 7 connects the probe assembly 6 and the support plate 3 to enable the probe assembly 6 to move in three degrees of freedom, specifically X-direction, Y-direction and rotational movement. The measuring plate 5 is connected to the moving assembly 7, and the measuring plate 5 can be displaced synchronously with the X-direction movement of the probe assembly 6. This design is used to ensure that the measuring plate 5 can move synchronously with the probe assembly 6 according to the unevenness of the measuring surface to ensure measurement accuracy. The follow-up marking assembly 9 is connected to the probe assembly 6, and the probe assembly 6 contacts and squeezes the measuring surface, so that the follow-up marking assembly 9 automatically marks the unevenness of the surface to facilitate subsequent direct observation by the staff.

[0028] Among them, see Figure 3 and Figure 4As shown, the moving assembly 7 includes a third telescopic rod 71 mounted on the support plate 3 through a mounting seat. The third telescopic rod 71 adopts a high-precision electric telescopic rod, which has the characteristics of rapid response and high displacement accuracy. The output end of the third telescopic rod 71 is connected to a connecting block 73, and a motor bracket 72 is fixed on the top of the connecting block 73. A motor 74 is installed in the motor bracket 72. The motor 74 adopts a reduction motor. The output end of the motor 74 is fixedly connected to a vertical frame 75. A fourth telescopic rod 76 is vertically arranged in the vertical frame 75. The fourth telescopic rod 76 can adopt an electric telescopic rod. The top of the fourth telescopic rod 76 is connected to the The outer wall of the outer cylinder 61 is fixedly connected, and the third telescopic rod 71 can be used to realize the movement of the connecting block 73, thereby driving the probe assembly 6 to move along the X direction to achieve adjustment according to the unevenness of the measuring surface. Specifically, by adjusting the X-direction position of the probe assembly 6 in real time, it is ensured that the probe assembly 6 can always fit the measuring surface to ensure the accuracy of the measurement data. The fourth telescopic rod 76 can be used to realize the movement of the probe assembly 6 along the Y direction to adjust the position of the probe assembly 6 for measurement. The output end of the motor 74 can drive the vertical frame 75 to deflect, and the fourth telescopic rod 76 can be used to achieve a wider range of measurements.

[0029] Among them, guide blocks are fixed on both sides of the connecting block 73, and guide grooves are opened on the inner side wall of the mounting seat. The guide blocks move along the guide grooves to improve the stability of the movement of the motor bracket 72.

[0030] In addition, in order to prevent the connection line of the fourth telescopic rod 76 from being entangled due to the rotation of the vertical frame 75, the forward and reverse rotation angles can be set to not exceed 360 degrees.

[0031] Among them, see Figure 4-Figure 6 As shown, the probe assembly 6 includes: An outer cylinder 61 is provided with an ejector pin 62 inside the outer cylinder 61, and the ejector pin 62 is retractable by being squeezed; A pressure sensor 63 is mounted on the end of the outer cylinder 61 away from the surface to be measured; The first elastic member 65 has one end fixed to the inner wall of the outer cylinder 61, and the other end of the first elastic member 65 is fixedly connected to the outer wall of the ejector pin 62. The first elastic member 65 is preferably a spring, and the spring has a large diameter at one end and a small diameter at the other end. The end with the large diameter is fixed to the inner wall of the outer cylinder 61, and the end with the small diameter is fixed to the outer wall of the ejector pin 62.

[0032] See Figure 5As shown, the probe assembly 6 also includes a groove 621 and a piston 66. The groove 621 is opened at the end of the ejector pin 62 away from the measured surface. The piston 66 is arranged in the groove 621 and can move along the inner wall of the groove 621. The side of the piston 66 facing the pressure sensor 63 is connected to the pressure column 64. When in use, the device is moved to the area to be measured using the moving wheel. After automatic calibration, the probe assembly 6 can be moved using the third telescopic rod 71 to make the ejector pin 62 contact and squeeze the surface to be measured. After the ejector pin 62 is squeezed, the first elastic member 65 is compressed and the end of the pressure column 64 squeezes the pressure sensor 63. The pressure sensor 63 can promptly feed back the signal to the controller. The controller promptly activates the laser rangefinder 4. The laser rangefinder 4 emits a laser that is reflected by the measuring plate 5. The time t from the laser emission to the laser reflection by the measuring plate 5 is the key data for determining whether the surface to be measured is flat. The propagation speed of the laser in the air is constant. According to the formula distance = speed × time, the distance from the laser rangefinder 4 to the measuring plate 5 can be calculated. Since the relative position of the measuring plate 5 and the probe assembly 6 is fixed, the distance can indirectly reflect the flatness of the surface to be measured corresponding to the position of the probe assembly 6. When the probe assembly 6 is changed to different positions for measurement, the measurement of each position is an independent process. When measuring a large area, the probe assembly 6 can be moved according to a preset grid route to ensure that each area can be measured. For each measurement point, the laser rangefinder 4 can emit the laser multiple times and take the average value of the time t obtained from multiple measurements to reduce the influence of external environmental factors (such as air humidity, dust, etc.) on the measurement results. By comparing the time t for each area, not only can the levelness of each area be determined, but the specific degree of unevenness in the uneven area can also be calculated. For example, if the time t for a certain area is shorter than the average time t for the surrounding areas, it indicates that the surface being measured in that area is relatively convex; conversely, it indicates that the area is relatively concave. The controller can automatically analyze and process this data, allowing workers to clearly understand the overall condition of the surface being measured, providing an accurate basis for subsequent finishing work.

[0033] See Figure 7-Figure 8 As shown, the follow-up marking component 9 includes: The annular spray pipe 91 is fixed to one end of the outer cylinder 61 and is located at the end close to the surface to be measured. A plurality of high-precision nozzles are evenly distributed on the annular spray pipe 91. The nozzle diameter is designed to ensure that the paint is sprayed in a mist or column shape, which will neither cause waste of paint due to excessive flow nor cause blurred markings due to insufficient flow. The second airbag 93 is made of a wear-resistant rubber material with excellent elasticity and good sealing and recovery properties. A marking paint is provided in the second airbag 93. The second airbag 93 is arranged in the groove 621 and is adjacent to the piston 66. In the initial stage, there is a certain distance between the piston 66 and the second airbag 93. A feeding pipe 92 is connected to the second airbag 93. The feeding pipe 92 is a hose. A feeding pipe 94 is connected between the annular spray pipe 91 and the second airbag 93. After the ejector 62 contacts the surface to be measured and squeezes the pressure column 64 to squeeze the pressure sensor 63, the time measured at this time is If t1 is compared with the time t for measuring the flat reference surface and does not exceed a set threshold value (the time t for measuring the flat reference surface here is a standard parameter determined by taking the average value after measuring the flat reference surface multiple times), it means that the flatness of the surface to be measured is within an acceptable range, and the controller will issue a command to stop squeezing. When time t1 exceeds the set threshold value, the controller will drive the third telescopic rod 71 to further extend, so that the ejector pin 62 continues to squeeze the surface to be measured. As the ejector pin 62 moves, the piston 66 at the inner end of the pressure column 64 will gradually move toward the second airbag 93 until squeezing, squeezing the second airbag 93. The internal marking paint is smoothly extruded through the feeding pipe 94 and transported to the annular spraying pipe 91, and finally sprayed out from the nozzle to realize automatic marking of uneven areas. This design can respond to the measurement results in real time and complete the marking at the moment the unevenness is detected, which greatly improves work efficiency. Secondly, the marking position is accurate, avoiding the deviation that may occur during manual marking. At the same time, the entire process does not require manual intervention, which reduces the intensity of manual labor and the errors caused by human factors, providing clear guidance for subsequent repair or processing work.

[0034] In addition, in order to ensure the linearity of the movement of the ejector pin 62 in the outer cylinder 61, a guide bar can be fixed on the outer wall of the ejector pin 62, and a guide groove is opened on the inner wall of the outer cylinder 61. The guide bar is used to move along the guide groove to realize the limiting guidance of the ejector pin 62, thereby reducing the influence of shaking or offset on the measurement.

[0035] Example 2:

[0036] participate Figure 1-Figure 5 As shown, this embodiment is an extension of the first embodiment. The optical distance measuring device with automatic calibration function also includes a follower jet assembly 8, which is connected to the probe assembly 6 and the measuring plate 5. When the probe assembly 6 squeezes the measuring surface, the follower jet assembly 8 moves synchronously to spray air flow toward the reflective surface of the measuring plate 5 for cleaning.

[0037] Among them, the follow-up jet assembly 8 includes a first airbag 83 and an air jet tube 82. The first airbag 83 is arranged in the groove 621 and is compressed by the piston 66. The air jet tube 82 is fixed to the top end of the front side of the measuring plate 5. The air jet tube 82 is provided with multiple nozzles facing the reflective surface of the measuring plate 5. An air outlet hose 81 is connected between the air jet tube 82 and the first airbag 83.

[0038] Among them, see Figure 9 As shown, rigid plates 831 are fixed at both ends of the first airbag 83, and a second elastic member 832 is arranged between the two rigid plates 831. The second elastic member 832 can be a spring. The piston 66 is connected to the adjacent rigid plates 831 through a connecting rod 67, and the other rigid plate 831 is fixed at the bottom end of the groove 621.

[0039] Through the above, in actual use, when the pressure column 64 squeezes the pressure sensor 63, the connecting rod 67 squeezes the first airbag 83, so that the gas in the first airbag 83 can be sent to the air injection pipe 82 through the air outlet hose 81. The gas blows away the dust attached to the reflective surface of the measuring plate 5 through the nozzle, thereby improving the measurement accuracy of the laser rangefinder 4.

[0040] Before each measurement, dust on the reflective surface of the measuring plate 5 is blown away once, and since the uneven areas need to be further squeezed, more gas is blown onto the reflective surface of the measuring plate 5 in this case.

[0041] In addition, when not squeezed, the second elastic member 832 can restore the first airbag 83 to its original shape so that it can be used next time.

[0042] During actual use, when the pressure column 64 applies an extrusion force to the pressure sensor 63, the connecting rod 67 connected thereto will be displaced synchronously, thereby squeezing the first airbag 83, causing the gas inside the first airbag 83 to be quickly transported to the air injection pipe 82 through the air outlet hose 81. Finally, the gas is ejected at high speed through the nozzle to blow away the dust attached to the reflective surface of the measuring plate 5, thereby effectively preventing dust from blocking or scattering the measuring beam of the laser rangefinder 4, and significantly improving the accuracy of the measurement data.

[0043] Among them, before each measurement by the laser rangefinder 4, a dust purge operation on the reflective surface of the measuring plate 5 is automatically triggered, thereby forming a stable pre-measurement cleaning mechanism. Moreover, when there are uneven areas on the measured surface, the pressure column 64 needs to be further squeezed downward to complete the marking. At this time, the squeezing force of the connecting rod 67 on the first airbag 83 will increase accordingly, so that more gas is discharged from the first airbag 83, and the gas flow rate and flow rate sprayed onto the reflective surface of the measuring plate 5 are also increased, so as to perform a more thorough purge.

[0044] In addition, in order to ensure the continuous and stable operation of the device, when no squeezing operation is performed, the second elastic member 832 provided inside the first airbag 83 will be reset, pushing the first airbag 83 back to its initial expanded state, so that the inside of the airbag is refilled with gas, preparing for the gas purge action during the next measurement, ensuring that the entire cleaning and measurement cycle can be repeated efficiently and reliably.

[0045] The present invention further provides an optical distance measurement method, which uses the above-mentioned optical distance measurement device with automatic calibration function, comprising the following steps: S1. Automatic calibration: Use the calibration component 2 to detect and adjust the levelness of the base 1 and adjust the support plate 3 to a predetermined height; S2, probe positioning: using the moving component 7 to drive the probe component 6 to the measurement starting position; S3, contact measurement: controlling the probe assembly 6 to move until it contacts the surface to be measured, and monitoring the contact pressure through the pressure sensor 63; S4, data acquisition: the laser rangefinder 4 transmits laser to the measuring board 5, collects reflected light signals and calculates distance data; S5. Surface treatment: During the contact measurement process, the follower air jet assembly 8 synchronously cleans the reflective surface of the measuring plate 5, while the follower marking assembly 9 marks the uneven surface.

[0046] The scheme of the present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the description of each embodiment has its own focus. For parts not described in detail in a particular embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules mentioned in this description are not necessarily required for the present invention. In addition, it is understood that the steps in the method of the embodiment of the present invention can be adjusted in order, combined, or deleted according to actual needs, and the structures in the device of the embodiment of the present invention can be combined, divided, or deleted according to actual needs.

[0047] While various embodiments of the present invention have been described above, the above descriptions are intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An optical distance measuring device with an automatic calibration function, comprising a movable base (1), a liftable support plate (3) provided above the base (1), a laser rangefinder (4) and a measuring plate (5) provided opposite to each other on the support plate (3), characterized in that: The base (1) is provided with a calibration piece (2), and further comprises: A probe assembly (6) is provided near one end of the measuring plate (5) and is used for contacting the surface to be measured; A moving assembly (7) is connected to the probe assembly (6) and the support plate (3) and is used to enable the probe assembly (6) to move in the X direction, the Y direction and the rotation direction. The measuring plate (5) is connected to the moving assembly (7) and can be displaced synchronously with the X-direction movement of the probe assembly (6); A follow-up marking assembly (9) is connected to the probe assembly (6), and the probe assembly (6) contacts and squeezes the measuring surface, so that the follow-up marking assembly (9) automatically marks the uneven surface. The follow-up jet assembly (8) is connected to the probe assembly (6) and the measuring plate (5). When the probe assembly (6) presses the measuring surface, the follow-up jet assembly (8) moves synchronously to spray air flow toward the reflecting surface of the measuring plate (5) for cleaning.

2. The optical distance measuring device with automatic calibration function according to claim 1, characterized in that: The probe assembly (6) comprises: An outer cylinder (61) having an ejector pin (62) disposed therein; A pressure sensor (63) is mounted on an end of the outer cylinder (61) away from the measured surface; A first elastic member (65) has one end fixed to the inner wall of the outer cylinder (61) and the other end fixedly connected to the outer wall of the ejector pin (62).

3. The optical distance measuring device with automatic calibration function according to claim 2, characterized in that: The probe assembly (6) further comprises: A groove (621) is formed at an end of the ejector pin (62) away from the surface to be measured; The piston (66) is disposed in the groove (621), and a pressure column (64) is connected to the side of the piston (66) facing the pressure sensor (63).

4. The optical distance measuring device with automatic calibration function according to claim 3, characterized in that: The follow-up marking component (9) comprises: An annular spray pipe (91) is fixed to one end of the outer cylinder (61) close to the surface to be measured; A second air bag (93) provided with marking paint is disposed in the groove (621) and arranged adjacent to the piston (66), and the second air bag (93) is connected to a feeding tube (92); The feeding pipe (94) is connected between the annular spraying pipe (91) and the second air bag (93).

5. The optical distance measuring device with automatic calibration function according to claim 3, characterized in that: The follow-up jet assembly (8) includes: A first airbag (83) is disposed in the groove (621) and compressed by a piston (66); An air jet pipe (82) is fixed to the top end of the front side of the measuring plate (5), and the air jet pipe (82) is provided with a plurality of nozzles facing the reflecting surface of the measuring plate (5); The air outlet hose (81) is connected between the air injection pipe (82) and the first air bag (83).

6. The optical distance measuring device with automatic calibration function according to claim 5, characterized in that: Rigid plates (831) are fixed to both ends of the first airbag (83), a second elastic member (832) is provided between the two rigid plates (831), and the piston (66) is connected to adjacent rigid plates (831) via a connecting rod (67).

7. The optical distance measuring device with automatic calibration function according to claim 2, characterized in that: The mobile component (7) comprises: A third telescopic rod (71) is mounted on the support plate (3) via a mounting seat; A connecting block (73) is connected to the output end of the third telescopic rod (71), and a motor bracket (72) is fixed to the top of the connecting block (73); A motor (74) is mounted in the motor bracket (72); A vertical frame (75) is fixedly connected to the output end of the motor (74); The fourth telescopic rod (76) is vertically arranged in the vertical frame (75), and the top end thereof is fixedly connected to the outer wall of the outer cylinder (61).

8. The optical distance measuring device with automatic calibration function according to claim 1, characterized in that: The calibration piece (2) comprises: A level detection device (21) is provided on the upper end surface of the base (1); A first telescopic rod (22), each moving wheel at the bottom of the base (1) is configured with an independent first telescopic rod (22).

9. The optical distance measuring device with automatic calibration function according to claim 1, characterized in that: A second telescopic rod (31) is provided between the base (1) and the supporting plate (3), and a telescopic guide rod (32) is provided at the corner between the base (1) and the supporting plate (3).

10. An optical distance measurement method, using the optical distance measurement device with automatic calibration function according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Automatic calibration: Detect and adjust the levelness of the base (1) through the calibration piece (2), and adjust the support plate (3) to a predetermined height; S2, probe positioning: using the moving component (7) to drive the probe component (6) to the measurement starting position; S3, contact measurement: controlling the probe assembly (6) to move until it contacts the surface to be measured, and monitoring the contact pressure through the pressure sensor (63); S4, data acquisition: the laser rangefinder (4) emits laser light to the measuring board (5), collects reflected light signals and calculates distance data; S5. Surface treatment: During the contact measurement process, the follow-up jet assembly (8) cleans the reflective surface of the measuring plate (5) synchronously, and the follow-up marking assembly (9) marks the uneven surface.

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