Non-contact measuring scale

Abstract

The utility model provides a non-contact measuring scale, and belongs to the technical field of engineering measurement. Comprising a ruler body flat plate, a leveling knob, a scaleplate, a sliding clamping groove, a short-direction level bubble instrument, a long-direction level bubble instrument, a starting point laser transmitter and a sliding laser transmitter, and the scaleplate, the sliding clamping groove, the short-direction level bubble instrument, the long-direction level bubble instrument, the starting point laser transmitter and the sliding laser transmitter are arranged at the upper end of the ruler body flat plate. The sliding clamping groove and the ruler are arranged in parallel, a sliding laser transmitter is slidably connected into the sliding clamping groove, the starting point laser transmitter is arranged at the end close to the starting position of the ruler, and the lower end of the ruler body flat plate is connected with a leveling knob. The measuring scale is light and portable, does not need secondary leveling in the operation process, effectively improves the working efficiency, adopts a linear projection imaging light source form, can ensure the vertical angle between the scale body flat plate and a measured object through simple adjustment, solves the key premise of measurement, and ensures that the measured value is accurate and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering surveying technical field especially relates to a non-contact measuring scale. BACKGROUND

[0002] With the continuous deepening of urban renewal process in China, the revitalization and reconstruction demand of existing buildings is increasing, and higher requirements are put forward for the work efficiency of existing building identification and measurement. When measuring the cross section of structural members represented by the floor beam of concrete structure, the current main method is in-situ measurement, and the tools include steel tape, steel ruler, etc. Due to the certain height of the floor (the height of civil buildings is usually 2.8-6 meters), in actual operation, the technicians need to complete the measurement work on the steel ladder or scaffold, and when the distance from the ground is more than 2 meters, it still needs to be operated by personnel with high-altitude operation qualification. The above situation causes the increase of on-site operation cost, the extension of operation time and the existence of certain safety risks. However, the existing long-distance measurement equipment, such as total station, also has the function of close-range measurement, but its operation is complex, the erection condition is harsh, and it is more suitable for outdoor or open space, and is rarely used for indoor structural member measurement operation.

[0003] Patent CN212721218U discloses a device for measuring the size of beam members at a high place of a building, which solves the problem of non-contact measurement of the cross section of floor beam members. However, the patent still has the following defects:

[0004] 1) The structure is relatively complex, the components are scattered, it is not convenient to carry, and the on-site assembly is difficult;

[0005] 2) The support plate and the scale are separated, and the outer sides of the two ends of the scale are sleeved with measuring seats, so that the support plate needs to be leveled, and the scale needs to be leveled again during measurement, which not only affects the operation efficiency, but also easily leads to the decrease of measurement accuracy;

[0006] 3) When measuring the beam width, it is necessary to ensure that the measurement track is a line segment perpendicular to the side edge line of the beam, that is, the length of the perpendicular line segment perpendicular to the side edge. The laser range finder used in patent CN212721218U is a point light source device, which cannot realize the perpendicularity correction of the scale body and the beam body, so the angle between the line connecting the two point light sources and the plane of the beam member is not perpendicular. The patent does not give the technical scheme of how to realize this key measurement premise, so it is difficult to ensure the accuracy of the measurement data. UTILITY MODEL CONTENTS

[0007] Therefore, the utility model aims at providing a non-contact measuring scale, which is simple in structure, easy to operate, can realize the measurement of the cross section size of the beam member without setting up climbing facilities, and has high measurement accuracy without secondary leveling during operation.

[0008] In order to achieve the above object, the technical scheme of the utility model is as follows: a non-contact measuring scale, comprising a scale body flat plate, a leveling knob, a scale, a sliding clamping groove, a short-direction horizontal bubble instrument, a long-direction horizontal bubble instrument, a starting point laser emitter and a sliding laser emitter, the upper end of the scale body flat plate is provided with the scale, the sliding clamping groove, the short-direction horizontal bubble instrument, the long-direction horizontal bubble instrument, the starting point laser emitter and the sliding laser emitter, the sliding clamping groove and the scale are arranged in parallel, and the sliding laser emitter is slidably connected in the sliding clamping groove, the starting point laser emitter is arranged at one end close to the starting position of the scale, and the lower end of the scale body flat plate is connected with the leveling knob.

[0009] Further, the scale is provided with an effective range starting point and an effective range ending point, and the effective range starting point is arranged at 3cm of the scale.

[0010] Further, the starting point laser emitter comprises a first light source, a switch and a battery, the first light source is electrically connected with the switch and the battery respectively, the first light source can emit a fan-shaped laser beam perpendicular to the scale body flat plate, and the imaging direction of the one-line on the horizontal plane of the laser beam is perpendicular to the length direction of the scale body flat plate.

[0011] Further, the sliding laser emitter comprises a second light source, a pointer, a battery, a switch and a second shell, the second light source, the battery and the switch are arranged in the second shell respectively, the battery and the switch are electrically connected with the second power source respectively, the second light source can emit a fan-shaped laser beam perpendicular to the scale body flat plate, and the imaging direction of the one-line on the horizontal plane of the laser beam is the same as that of the first light source; the second shell is slidably connected in the sliding clamping groove, the pointer is arranged on the second shell and faces the scale, and the direction of the pointer is coincident with the projection line direction of the laser beam of the second light source.

[0012] Further, the leveling knob comprises a connecting rod, an adjusting handle, a spherical structure and a pad plate, the connecting rod is a telescopic rod structure, the adjusting handle is connected on the connecting rod, the length of the connecting rod can be adjusted by tightening or loosening the adjusting handle, the upper end of the connecting rod is connected with the scale body flat plate, the lower end is provided with the spherical structure, and the connecting rod is connected with the pad plate through the spherical structure.

[0013] Further, it further comprises a handheld laser range finder, and the handheld laser range finder can be placed vertically on the scale body flat plate.

[0014] Compared with the prior art, the non-contact measuring scale has the following advantages:

[0015] (1) the utility model discloses a measuring scale can realize by single person on the ground position to the conventional height's floor top visible part concrete beam component cross section measurement, with simple operation, fast, personnel applicability (no special operation qualification) of wide (no high risk of falling (not set up climbing facilities) characteristics;

[0016] (2) the utility model discloses a measuring scale is especially applicable to the measurement project (such as original design drawing missing, because the identification or reinforcement design needs, needs the project of structure model reduction) that needs to collect a large amount of data to the cross section size of existing building beam component in a short time;

[0017] (3) the light source form of laser adopts a line projection imaging, and simple adjustment can ensure the vertical angle of the scale body flat plate and the beam body, solves the key prerequisite of measurement, and ensures that the measured value is accurate and reliable;

[0018] (4) the light source form of laser adopts a line projection imaging, and the light source of a line projection imaging is more easily observed and captured, can further improve the measurement speed, and the beam body geometry size can be observed whether uniform;

[0019] (5) the utility model discloses a measuring scale integrates all measurement components in the scale body contour, and the starting point laser emitter, sliding laser emitter and scale are independently arranged at different positions of the scale body flat plate, and only need to level the scale body flat plate during operation, so that the leveling of the scale, starting point laser emitter and sliding laser emitter can be realized, and the operation process does not need secondary leveling, effectively improves the operation efficiency;

[0020] (6) the utility model discloses a measuring scale integrates all measurement components in the scale body contour, and there is no scattered accessory, and it is light and portable;

[0021] (7) the component width, spacing value can be directly read on the scale, without secondary processing, and the operation efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings that form a part of the present utility model are used to provide further understanding of the present utility model, and the illustrative embodiment of the present utility model and its explanation are used to explain the present utility model, and do not constitute improper limitation to the present utility model. In the drawings:

[0023] Figure 1 It is a structure schematic view of a non-contact measuring scale described in the utility model embodiment;

[0024] Figure 2 It is a front view of a non-contact measuring scale described in the utility model embodiment;

[0025] Figure 3The top view of the non-contact measuring scale according to an embodiment of the utility model;

[0026] Figure 4 The left view of the non-contact measuring scale according to an embodiment of the utility model;

[0027] Figure 5 The right view of the non-contact measuring scale according to an embodiment of the utility model;

[0028] Figure 6 The structural schematic diagram of the leveling knob;

[0029] Figure 7 The schematic diagram of the embodiment for measuring the beam width;

[0030] Figure 8 The schematic diagram of the embodiment for measuring the net height of the beam.

[0031] Marked legend:

[0032] 1, the scale body flat plate; 2, leveling knob; 3, scale; 4, effective range starting point; 5, effective range end point; 6, sliding slot; 7, short horizontal bubble instrument; 8, long horizontal bubble instrument; 9, starting point laser emitter; 10, sliding laser emitter; 11, connecting rod; 12, adjusting handle; 13, spherical structure; 14, backing plate; 15, handheld laser range finder; 16, beam component; 17, first light source; 18, first housing; 19, second light source; 20, pointer; 21, second housing. Specific implementation

[0033] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0034] The utility model will be described in detail below with reference to the drawings and in combination with the floor beam section measurement embodiment.

[0035] As Figures 1-8The utility model discloses a non -contact type measuring scale, including the flat board of ruler body 1, level knob 2, scale 3, sliding slot 6, short horizontal bubble instrument 7, long horizontal bubble instrument 8, starting point laser emitter 9 and sliding laser emitter 10, the upper end of flat board of ruler body 1 (i. e. the front of flat board of ruler body 1) is provided with scale 3, sliding slot 6, short horizontal bubble instrument 7, long horizontal bubble instrument 8, starting point laser emitter 9 and sliding laser emitter 10, and sliding slot 6 and scale 3 are arranged in parallel, and sliding laser emitter 10 is slidably connected in sliding slot 6. Starting point laser emitter 9 is arranged at one end close to the starting position of scale 3, and the lower end of flat board of ruler body 1 (i. e. the back of flat board of ruler body 1) is connected with a plurality of level knobs 2, and specifically, according to the principle of determining the unique plane of three non -collinear points, one side of flat board of ruler body 1 is provided with two level knobs 2, and the other side is provided with one level knob 2, which not only ensures the stability of the measuring scale, but also improves the leveling efficiency. Level knob 2 includes connecting rod 11, adjusting handle 12, spherical structure 13 and backing plate 14, connecting rod 11 is a telescopic rod structure, adjusting handle 12 is connected on connecting rod 11, the length adjustment of connecting rod 11 can be realized by tightening or loosening adjusting handle 12, and the length adjustment of the telescopic rod is realized by rotating adjusting handle 12, which is the prior art, and will not be described here. The advantages of this structure are that the length of connecting rod 11 can be finely adjusted, and the leveling efficiency is high. The upper end of connecting rod 11 is connected with flat board of ruler body 1, and the lower end is provided with spherical structure 13, and connecting rod 11 is connected with backing plate 14 through spherical structure 13. It should be noted that the leveling structure can also have other structure forms, such as level knob 2 including connecting rod 11, adjusting handle 12, spherical structure 13 and backing plate 14, the upper end of connecting rod 11 is threadedly connected with flat board of ruler body 1, adjusting handle 12 is fixedly connected on connecting rod 11, and rotating adjusting handle 12 can drive connecting rod 11 to rotate, thereby realizing the leveling of flat board of ruler body 1. Level knob 2 can also be other structures that can realize the leveling of flat board of ruler body 1. In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated.

[0036] The scale 3 is provided with an effective range starting point 4 and an effective range ending point 5, and the effective range starting point is arranged at 3 cm of the scale 3.

[0037] The starting point laser emitter 9 comprises a first light source 17, a switch (not shown in the figure) and a battery (not shown in the figure), the first light source 17 is electrically connected with the switch and the battery respectively, the switch is used for controlling the opening or closing of the first light source 17, and the battery is used for providing power supply for the first light source 17. In actual application, the first light source 17, the switch and the battery can be respectively installed in the first shell 18, and the first shell 18 is installed on the ruler body flat plate 1.

[0038] The sliding laser emitter 10 comprises a second light source 19, a pointer 20, a battery (not shown in the figure), a switch (not shown in the figure) and a second shell 21, the second light source 19, the battery and the switch are respectively installed in the second shell 21, and the battery and the switch are electrically connected with the second power supply respectively, the second light source 19 can emit a fan-shaped laser beam perpendicular to the ruler body flat plate 1, and the imaging direction of the laser beam projected on the horizontal line is the same as that of the first light source 17; the second shell 21 is slidingly connected in the sliding clamping groove 6, the pointer 20 is installed on the second shell 21 and faces the scale 3, and the direction of the pointer 20 is coincided with the direction of the laser beam projected line of the second light source 19. When the second shell 21 slides in the sliding clamping groove 6, the second light source 19 and the pointer 20 can move together with the second shell 21.

[0039] Functions of each component are as follows:

[0040] The ruler body flat plate 1 is used for integrating all parts and ensuring that the geometric conditions such as positions and angles of each part are fixed and unchanged. When used, the ruler body flat plate 1 needs to be leveled to provide a horizontal reference surface for measurement.

[0041] The leveling knob 2 adopts an embedded spherical connection at the position where the lower end part is in contact with the pad 14, so as to ensure that the pad 14 can be rotated arbitrarily according to the slope of the site, and is used for horizontally adjusting the ruler body flat plate 1 in the actual measurement site to ensure that the ruler body flat plate 1 is located at a standard horizontal angle.

[0042] The scale 3 is used for directly reading the beam dimension value on the scale 3 at the position of the pointer 20 after measurement, without the need of secondary processing of data.

[0043] The range interval mark (the interval range between the effective range starting point 4 and the effective range ending point 5): The effective measurement range is shown, and the width size of the concrete beam section of general industrial and civil buildings is usually between 10 cm and 70 cm, so the effective range starting point 4 of the embodiment is arranged at 3 cm, and the value below 3 cm is not supported for measurement. Figure 1The maximum range value is 70cm, that is, the value of the effective range end point 5 is 70cm, which can cover most measurement requirements; it should be noted that in actual application, the maximum range value can be greater than 70cm, and is not limited to 70cm.

[0044] The short horizontal bubble instrument 7 and the long horizontal bubble instrument 8 are matched with the leveling knob 2, and the short horizontal bubble instrument 7 and the long horizontal bubble instrument 8 are used to level the ruler body plate 1.

[0045] The starting point laser emitter 9 (a line) can emit a fan-shaped laser beam perpendicular to the ruler body plate 1, and the imaging direction of the line projected on the horizontal plane is perpendicular to the length direction of the ruler body plate 1; in use, the laser line projection needs to be aligned with one side edge of the bottom of the beam member 16, which is the starting point of measurement, and can also ensure that the direction of the ruler scale is perpendicular to the beam member 16 in the horizontal plane.

[0046] The sliding laser emitter 10 (a line) can slide in the sliding slot 6 and emit a fan-shaped laser beam perpendicular to the ruler body plate 1, and the imaging direction of the line projected on the horizontal plane is the same as that of the starting point laser emitter 9; when the line projection is aligned with the other side edge of the bottom of the beam member 16, the data measurement reading can be performed through the position of the pointer 20 of the sliding laser emitter 10.

[0047] The light source of the laser adopts a line projection imaging form, and simple adjustment can ensure the perpendicular angle between the ruler body plate 1 and the beam body, solves the key premise of measurement, and ensures that the measurement value is accurate and reliable; the light source of the line projection imaging is easier to observe and capture, and the measurement speed can be further improved, and whether the geometric size of the beam body is uniform can be observed.

[0048] The measurement ruler integrates all measurement members in the contour of the ruler body, has no scattered accessories, has a width similar to that of an ordinary mobile phone, and is light and portable; the measurement ruler integrates all measurement members in the contour of the ruler body, and the starting point laser emitter 9, the sliding laser emitter 10 and the scale 3 are independently arranged at different positions of the ruler body plate 1; in the operation process, the ruler body plate 1 only needs to be leveled, and the leveling of the scale 3, the starting point laser emitter 9 and the sliding laser emitter 10 can be realized, so that the operation process does not need to be leveled twice, and the work efficiency is improved.

[0049] Embodiment two

[0050] The structure is basically the same as that of embodiment one, and the difference lies in that the measurement ruler further comprises a handheld laser range finder 15, and the handheld laser range finder 15 can be separated and vertically placed on the ruler body plate 1.

[0051] In practical application process, the operation steps of the measuring scale are as follows:

[0052] First step: placing the scale body flat plate 1 on the ground or other stable plane under the beam member 16 to be measured, and opening the starting point laser emitter 9;

[0053] Second step: adjusting the position of the scale body flat plate 1, so that the laser beam of the starting point laser emitter 9 is aligned with the one side edge of the bottom surface of the beam member 16 to be measured;

[0054] Third step: rotating the leveling knob 2 to level the scale body according to the short horizontal bubble instrument 7 and the long horizontal bubble instrument 8 in the position determined in the previous step;

[0055] Fourth step: opening the sliding laser emitter 10, and manually adjusting the position of the sliding laser emitter 10 along the sliding slot 6 within the effective range, so that the laser beam of the sliding laser emitter 10 is aligned with the other side edge of the bottom surface of the beam member 16 to be measured;

[0056] Fifth step: reading the value b of the scale 3 pointed by the pointer 20, and recording it as "beam width";

[0057] Sixth step: when the net height of the beam needs to be measured, the handheld laser range finder 15 is placed vertically on the scale body flat plate 1, and the distance is measured at any position within and outside the beam width projection plane (only for the purpose of illustration, the middle position C and the position D are shown), and the readings h1 and h2 are obtained, and the absolute value |h1-h2| of the difference between the two values is recorded as "beam net height". Figure 8

[0058] Specifically:

[0059] The staff operates at the position directly below the beam member 16 to be measured, and places the front of the scale body flat plate 1 upward on the ground or other stable plane. For example, Figure 7 ​As shown, the starting point laser emitter 9 is turned on, and the laser beam emitted by the starting point laser emitter 9 forms a sector A. The position of the ruler flat plate 1 is adjusted so that the linear laser line L1 of the starting point laser emitter 9 is flush with the bottom side edge of the beam member 16 to be measured, and the ruler flat plate 1 is leveled by the leveling knob 2 and the two-way bubble level (the short-way bubble level 7 and the long-way bubble level 8). By virtue of the characteristic that the linear line image projected on the horizontal plane by the laser beam is perpendicular to the length direction of the ruler flat plate 1, the perpendicular relationship between the direction of the ruler flat plate 1 and the beam direction is ensured. The sliding laser emitter 10 is turned on, and the laser beam emitted by the sliding laser emitter 10 forms a sector B. The position of the sliding laser emitter 10 is adjusted so that the linear laser line L2 of the sliding laser emitter 10 is flush with the other side edge of the bottom of the beam member 16. By virtue of the principle of direct light projection, the value of the scale 3 pointed to by the pointer 20 on the sliding laser emitter 10 is directly read, which is the beam width.

[0060] When the net height of the beam member 16 needs to be measured, the handheld laser range finder 15 is used in cooperation. The handheld laser range finder 15 is vertically placed on the ruler flat plate 1 by virtue of the horizontal characteristic of the ruler flat plate 1, and the distance between the ruler flat plate 1 and the beam lower skin and the floor lower skin is measured at an arbitrary position in the beam width projection plane range and outside the beam width projection plane range, respectively. Figure 8 As shown, the handheld laser range finder 15 is vertically placed at an arbitrary position in the beam width projection plane range and outside the beam width projection plane range (only for illustration, the positions C and D), Figure 8 The measured value at the position C is h1, and the measured value at the position D is h2. The absolute value of the difference between the two values |h1-h2| is recorded as the "net height of the beam". Since the laser range finder has been widely used and has the characteristics of portability and easy operation, the handheld laser range finder 15 and the non-contact measuring ruler are separately arranged in the utility model, rather than being secondarily integrated. The separate arrangement is not only convenient for storage and carrying of the two, but also convenient for separate use of the handheld laser range finder 15 and the non-contact measuring ruler. It should be noted that when the net height of the beam member 16 is measured, if it is performed after the beam width of the beam member 16 is measured, that is, the leveling of the ruler flat plate 1 has been performed, the net height of the beam member 16 can be directly measured at this time. If the net height of the beam member 16 is measured, it is not performed after the beam width of the beam member 16 is measured, that is, the ruler flat plate 1 is not leveled, the ruler flat plate 1 needs to be leveled by the leveling knob 2 and the two-way bubble level (the short-way bubble level 7 and the long-way bubble level 8) at this time, and then the net height of the beam member 16 is measured.

[0061] It should be noted that, similar to the beam section measurement principle, the utility model can also be used for measuring the object plane size or distance with rectangular boundary or parallel relationship in higher position horizontal plane, such as the distance between suspended ceiling joists, the plane size of suspended ceiling board, the plane size of floor hole, the distance between equipment hanging bridge, the plane size of equipment hanging outline, etc.

[0062] Taking the distance between suspended ceiling joists as an example, the staff operates at the position directly below the suspended ceiling joist area to be measured, and places the front of the ruler flat plate 1 on the ground or other stable plane. The starting point laser emitter 9 is opened, the position of the ruler flat plate 1 is adjusted, the one-character laser line L1 of the starting point laser emitter is flush with any one of the joist components of the area to be measured, and the ruler flat plate 1 is leveled through the leveling knob 2 and the bidirectional bubble level (the short-direction horizontal bubble instrument 7 and the long-direction horizontal bubble instrument 8). The one-character line imaging direction perpendicular to the length direction of the ruler flat plate 1 is used to ensure the vertical relationship between the direction of the ruler flat plate 1 and the measured joist component. The sliding laser emitter 10 is opened, the position of the sliding laser emitter 10 is adjusted, and the one-character laser line L2 of the sliding laser emitter 10 is flush with the adjacent suspended ceiling joist component. The scale 3 value pointed to by the pointer 20 on the sliding laser emitter 10 is directly read by using the principle of direct light projection, and the distance between suspended ceiling joists is obtained.

[0063] The above only describes the preferred embodiment of the utility model, and does not limit the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A non-contact measuring scale characterized by: The utility model relates to a laser leveling ruler, including the flat plate of ruler body (1), leveling knob (2), scale (3), sliding slot (6), short horizontal bubble instrument (7), long horizontal bubble instrument (8), starting point laser emitter (9) and sliding laser emitter (10), the upper end of flat plate of ruler body (1) is provided with scale (3), sliding slot (6), short horizontal bubble instrument (7), long horizontal bubble instrument (8), starting point laser emitter (9) and sliding laser emitter (10), sliding slot (6) and scale (3) are arranged in parallel, and sliding slot (6) is slidably connected with sliding laser emitter (10), starting point laser emitter (9) is arranged at one end close to the starting position of scale (3), and the lower end of flat plate of ruler body (1) is connected with leveling knob (2).

2. A non-contact measuring scale according to claim 1, wherein: The scale (3) is provided with an effective range starting point (4) and an effective range ending point (5), and the effective range starting point is arranged at 3cm of the scale (3).

3. A non-contact measuring scale according to claim 1, wherein: The starting point laser emitter (9) comprises a first light source (17), a switch and a battery, the first light source (17) is electrically connected with the switch and the battery respectively, the first light source (17) can emit a fan-shaped laser beam perpendicular to the flat plate of ruler body (1), and the imaging direction of a horizontal line of the laser beam projected on a horizontal plane is perpendicular to the length direction of the flat plate of ruler body (1).

4. A non-contact measuring scale according to claim 3, wherein: The sliding laser emitter (10) comprises a second light source (19), a pointer (20), a battery, a switch and a second shell (21), the second light source (19), the battery and the switch are installed in the second shell (21) respectively, the battery and the switch are electrically connected with the second power source respectively, the second light source (19) can emit a fan-shaped laser beam perpendicular to the flat plate of ruler body (1), and the imaging direction of a horizontal line of the laser beam projected on a horizontal plane is the same as that of the first light source (17); the second shell (21) is slidably connected in the sliding slot (6), the pointer (20) is installed on the second shell (21) and faces the scale (3), and the direction of the pointer (20) coincides with the direction of the laser beam projection line of the second light source (19).

5. A non-contact measuring scale according to claim 1, wherein: The leveling knob (2) comprises a connecting rod (11), an adjusting handle (12), a spherical structure (13) and a backing plate (14), the connecting rod (11) is a telescopic rod structure, the adjusting handle (12) is connected to the connecting rod (11), the length of the connecting rod (11) can be adjusted by tightening or loosening the adjusting handle (12), the upper end of the connecting rod (11) is connected with the flat plate of ruler body (1), the lower end is provided with the spherical structure (13), and the connecting rod (11) is connected with the backing plate (14) through the spherical structure (13).

6. A non-contact measuring scale according to claim 1, wherein: The utility model also comprises a handheld laser range finder (15), which can be placed vertically on the flat plate of ruler body (1).

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