A laser measuring device for waterproof membranes

Abstract

This invention relates to the field of laser measurement technology, and more particularly to a laser measurement device for waterproof membrane. It includes a worktable, an electric push rod mounted on the worktable, a first motor mounted on the telescopic part of the electric push rod via a support plate, an electric slide connected to the output shaft of the first motor via a lead screw, a movable frame threaded onto the lead screw, a first laser rangefinder mounted on the electric slide, a first laser receiver mounted on the movable frame, a sliding block slidably connected to the movable frame, a connecting frame slidably connected to the sliding block, and a rotating wheel rotatably connected to the connecting frame. This invention measures the length of the waterproof membrane using the first laser receiver and the first laser rangefinder. During the cutting process of the waterproof membrane, the height of various points on the sample is monitored in real time by utilizing the height change of the rotating wheel, reducing the probability of dimensional errors in sample cutting due to wrinkles in the waterproof membrane, thereby ensuring the accuracy of subsequent sample testing.

Description

Technical Field

[0001] This invention relates to the field of laser measurement technology, and in particular to a laser measurement device for waterproof membranes. Background Technology

[0002] In the production and testing of waterproof membranes, it is necessary to measure and cut the membranes to test samples of specific dimensions (such as tensile testing of samples of specific unit dimensions) to ensure that the strength of the waterproof membranes meets the standards. However, existing waterproof membrane measurement methods still have the following technical problems: Waterproof membranes are flexible materials, and during the winding, storage, and transportation processes, they will develop wrinkles due to pressure and impacts. These wrinkles will result in wavy sections on the waterproof membrane, while the laser emitted by the measuring device is a straight line. When traditional laser measuring devices measure the size of samples, if the waterproof membrane has wrinkles, and once the wrinkled waterproof membrane is straightened during the testing process after measurement and cutting, the measured size will be larger than the preset size, thus affecting the accuracy of the waterproof membrane measurement and the accuracy of subsequent test results. Summary of the Invention

[0003] In order to overcome the disadvantages pointed out in the background art above, the object of the present invention is to provide a laser measuring device for waterproof membranes.

[0004] The technical solution is as follows: A laser measuring device for waterproof membrane includes a worktable, an electric push rod mounted on the worktable, a support plate fixedly connected to the telescopic part of the electric push rod, a first motor symmetrically distributed on the support plate, a lead screw fixedly connected to the output shaft of the first motor, an electric slide rotatably connected to the lead screw and slidably connected to the worktable, a movable frame threadedly connected to the symmetrically distributed lead screws, a first laser rangefinder mounted on the electric slide, a first laser receiver mounted on the movable frame, a plurality of spaced sliding blocks slidably connected to the movable frame, pressure sensors mounted on the sliding blocks, a connecting frame slidably connected to the sliding blocks, a first elastic element fixedly connected between the connecting frame and an adjacent pressure sensor, and a rotating wheel rotatably connected to the connecting frame.

[0005] Preferably, each of the two connecting frames located on both sides of the movable frame is fixedly connected to a connecting block, and a marker is slidably connected to the connecting block. A second elastic element is fixedly connected between the marker and the adjacent connecting block.

[0006] Preferably, the movable frame is rotatably connected to an adjusting rod, the sliding block is threadedly connected to the adjusting rod, and the two connecting frames located on both sides of the movable frame are respectively equipped with a second laser rangefinder and a second laser receiver.

[0007] Preferably, the central axis of the marker is coplanar with the central axis of the rotating wheel, and the distance between the two central axes of the marker is equal to the distance between the second laser rangefinder and the second laser receiver.

[0008] Preferably, the connecting frame is rotatably and slidably connected to a rotating plate, and the rotating plate is rotatably connected to a rotating roller, which is used to flatten the waterproof membrane.

[0009] Preferably, the rotating plate is equipped with a one-way gear that is rotatably connected to the adjacent connecting frame, and the worktable is slidably connected with a number of racks with missing teeth that are the same number as the one-way gears. The thickness of the racks with missing teeth is greater than the thickness of the adjacent one-way gears, and the racks with missing teeth are used to drive the adjacent one-way gears.

[0010] Preferably, the rotating rollers are inclined, and all the rotating rollers gradually tilt towards the center of the worktable from the point near the electric carriage to the point far away.

[0011] Preferably, the workbench is equipped with a second motor, and the output shaft of the second motor is fixedly connected to a rotating frame.

[0012] Preferably, the rotating frame consists of symmetrically distributed rotating disks and symmetrically distributed rotating rods, and the rotating rods of the rotating frame are slidably connected to symmetrically distributed sliding rods, the outer surface of which is rough.

[0013] Preferably, the sliding rod is fixedly connected to a limiting pin, the worktable is fixedly connected to symmetrically distributed limiting frames, the limiting frames are rotatably connected to the rotating disks of the adjacent rotating frame, the limiting frames are provided with limiting grooves, and the limiting pins slide within the corresponding limiting grooves.

[0014] Compared with the prior art, the present invention has the following advantages: The present invention measures the length of the waterproof membrane using a first laser receiver and a first laser rangefinder. During the cutting process of the waterproof membrane, the height of various parts of the waterproof membrane sample is detected in real time by utilizing the height change of the rotating roller, thereby reducing the probability of sample cutting size errors caused by wrinkles in the waterproof membrane and ensuring the accuracy of subsequent sample testing. By moving the rotating roller, the wrinkled waterproof membrane is flattened. At the same time, the rotating roller swings to push the waterproof membrane from the middle to both sides of the edge, flattening the wrinkles caused by the waterproof membrane during winding, storage, and transportation, ensuring the flatness of the waterproof membrane surface, and thus improving the accuracy of the waterproof membrane size measurement. Before measuring the waterproof membrane, one side of the waterproof membrane is fixed by a sliding rod to ensure the stability of the waterproof membrane during the measurement process. Furthermore, the limiting pin drives the adjacent sliding rod to move towards the edge of the waterproof membrane, flattening the fixed edge of the waterproof membrane, ensuring the flatness of the waterproof membrane surface, and thus improving the accuracy of the waterproof membrane size measurement. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the lead screw, electric carriage, and movable frame of the present invention;

[0017] Figure 3 This is a three-dimensional structural cross-sectional view of the movable frame of the present invention;

[0018] Figure 4 This is a three-dimensional structural diagram of the rotating roller of the present invention;

[0019] Figure 5 This is a three-dimensional structural diagram of the rotating frame and sliding rod of the present invention;

[0020] Figure 6 This is a three-dimensional structural cross-sectional view of the limiting frame of the present invention;

[0021] Figure 7 This is a three-dimensional structural diagram of the limiting frame of the present invention.

[0022] The reference numerals in the attached drawings are as follows: 1. Workbench; 2. Electric push rod; 3. Support plate; 4. First motor; 5. Lead screw; 6. Electric slide; 7. Moving frame; 8. First laser rangefinder; 9. First laser receiver; 10. Sliding block; 11. Pressure sensor; 12. Connecting frame; 13. First elastic element; 14. Rotating wheel; 15. Connecting block; 16. Marker; 17. Second elastic element; 18. Adjusting rod; 1801. Second laser rangefinder; 1802. Second laser receiver; 19. Rotating plate; 20. Rotating roller; 21. One-way gear; 22. Gear rack; 23. Second motor; 24. Rotating frame; 25. Sliding rod; 2501. Limiting pin; 26. Limiting frame; 2601. Limiting groove. Detailed Implementation

[0023] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0024] Example 1

[0025] A laser measuring device for waterproof membranes, such as Figures 1-4As shown, the system includes a workbench 1, on which a control terminal (not shown) is installed. Two electric actuators 2, symmetrically distributed and electrically connected to the control terminal, are mounted on the workbench 1. A support plate 3 is fixedly connected to the telescopic portion of each electric actuator 2. Two first motors 4, symmetrically distributed and electrically connected to the control terminal, are mounted on the support plate 3. A lead screw 5 is fixedly connected to the output shaft of each first motor 4. The telescopic portion of the electric actuator 2 is used to move the support plate 3 up and down to adjust the height of the first motors 4 and the lead screw 5. The two first motors 4 rotate in the same direction, and the threads on the two lead screws 5 have the same direction of rotation. The lead screw 5 is rotatably connected to... The workbench 1 is slidably connected to an electric slide 6, which is electrically connected to a control terminal. Symmetrically distributed lead screws 5 are threaded together to a movable frame 7. The electric slide 6 is equipped with a first laser rangefinder 8, which is electrically connected to the control terminal. The movable frame 7 is equipped with a first laser receiver 9, which is electrically connected to the control terminal. The first laser receiver 9 and the first laser rangefinder 8 are aligned. The first laser receiver 9 and the first laser rangefinder 8 are used to measure the left and right lengths of the waterproof roll sample. The movable frame 7 is slidably connected to several spaced sliding blocks 10, which are equipped with pressure plates electrically connected to the control terminal. Force sensor 11, sliding block 10 is slidably connected to connecting frame 12, connecting frame 12 and adjacent pressure sensor 11 are fixedly connected to first elastic element 13, wherein first elastic element 13 is compression spring, connecting frame 12 is rotatably connected to rotating wheel 14, by changing the position of first laser receiver 9, first laser receiver 9 receives laser emitted by first laser rangefinder 8 to measure the length of the sample to be cut from waterproof membrane. During the cutting process of waterproof membrane, multiple rotating wheels 14 pass through various parts of the cutting sample, and the height of various parts of the waterproof membrane sample is measured by the height change of rotating wheels 14. The position is detected in real time (the rotating wheel 14 squeezes the first elastic element 13 through the connecting frame 12, causing the pressure on the pressure sensor 11 to change, which converts the degree of wrinkling of the waterproof membrane into the pressure change of the pressure sensor 11. The pressure sensor 11 converts the degree of wrinkling of the waterproof membrane into an electrical signal and outputs it to the control terminal. The control terminal combines the degree of wrinkling of the waterproof membrane with the length measured by the first laser rangefinder 8 to calculate the actual length of the wrinkled waterproof membrane sample), so as to reduce the probability of sample cutting size errors caused by the wrinkling of the waterproof membrane, thereby ensuring the accuracy of subsequent sample testing.

[0026] like Figure 3 and Figure 4As shown, two connecting frames 12 located on the front and rear sides of the movable frame 7 are fixedly connected to connecting blocks 15. A marker pen 16 is slidably connected to the connecting blocks 15. A second elastic element 17 is fixedly connected between the marker pen 16 and the adjacent connecting block 15. The second elastic element 17 is a compression spring. When the lower end of the marker pen 16 presses against the waterproof membrane, the second elastic element 17 is in a compressed state. The central axis of the marker pen 16 is coplanar with the central axis of the rotating wheel 14 to ensure that the marking lines drawn by the two marker pens 16 are aligned with the moving path of the rotating wheel 14.

[0027] like Figure 3 and Figure 4 As shown, the movable frame 7 is rotatably connected to an adjusting rod 18. The adjusting rod 18 has the same number of threads as the sliding block 10. The two threads at the front and the two threads at the rear of the adjusting rod 18 have opposite directions of rotation. The sliding block 10 is threadedly connected to the adjusting rod 18. Two connecting frames 12 located on both sides of the movable frame 7 are respectively equipped with a second laser rangefinder 1801 and a second laser receiver 1802. The second laser rangefinder 1801 and the second laser receiver 1802 are used to measure the front and rear widths of the waterproof roll sample. The distance between the central axes of the two marker pens 16 is equal to the distance between the second laser rangefinder 1801 and the second laser receiver 1802, so as to ensure that the spacing between the marking lines drawn by the two marker pens 16 is the same as the spacing between the second laser rangefinder 1801 and the second laser receiver 1802.

[0028] The specific working principle is as follows:

[0029] When the operator needs to use this device to measure waterproof membrane, the operator places a piece of waterproof membrane on the workbench 1, and then activates the two electric push rods 2 and the electric slide 6 through the control terminal. The telescopic parts of the two electric push rods 2 together drive the support plate 3 to move downward, and the electric slide 6 drives the moving frame 7 to move downward, so as to adjust the height of the support plate 3, the first motor 4, the lead screw 5 and the moving frame 7. The moving frame 7 drives the rotating wheel 14 to move through the sliding block 10 and the connecting frame 12, so that the rotating wheel 14 fits the waterproof membrane of different thicknesses, thereby improving the applicability of this device.

[0030] After the rotating wheel 14 is in contact with the waterproof membrane, the operator closes the two electric push rods 2 and the electric slide 6 through the control terminal, and turns on the two first motors 4, the first laser receiver 9 and the first laser rangefinder 8. The output shaft of the first motor 4 drives the lead screw 5 to rotate, and the lead screw 5 drives the moving frame 7 to move to the left. The moving frame 7 drives the rotating wheel 14 to move to the left through the sliding block 10 and the connecting frame 12. During the process of the rotating wheel 14 moving to the left, the moving frame 7 drives the first laser receiver 9 to move to the left, so that the distance between the first laser receiver 9 and the first laser rangefinder 8 changes, and the size of the sample to be cut from the waterproof membrane is measured in real time.

[0031] During the leftward movement of the rotating wheel 14, if the surface of the waterproof membrane wrinkles due to bumps during winding, storage, and transportation, a section of the waterproof membrane bends upward, causing the rotating wheel 14 to move upward. The rotating wheel 14 drives the connecting frame 12 to move upward, compressing the first elastic element 13. The pressure sensor 11 experiences a change in pressure, which is then fed back to the control terminal. The control terminal combines the degree of wrinkling of the waterproof membrane with the length measured by the first laser rangefinder 8 to calculate the actual length of the wrinkled waterproof membrane sample. This reduces the probability of incorrect sample cutting dimensions due to the wrinkling of the waterproof membrane, thereby ensuring the accuracy of subsequent sample testing.

[0032] As the rotating wheel 14 moves to the left, the two connecting frames 12 at the front and rear respectively drive the connecting blocks 15 on them to move to the left, causing the marker pen 16 to move to the left. At this time, the second elastic element 17 is in a compressed state, and the lower end of the marker pen 16 presses against the waterproof membrane. The marker pen 16 marks the waterproof membrane during the movement, so that the subsequent operators can cut the sample of the waterproof membrane after measurement.

[0033] Before the rotating wheel 14 begins to move to the left, the position of the front and rear sliding blocks 10 is adjusted by rotating the adjusting rod 18, so that the front and rear connecting frames 12 move in opposite directions and away from each other, changing the distance between the second laser rangefinder 1801 and the second laser receiver 1802. At the same time, the front and rear connecting frames 12 drive the adjacent marker pens 16 to move, measuring and marking the width of the sample to be cut on the waterproof membrane.

[0034] During the movement of the first laser receiver 9 driven by the moving frame 7, when the distance between the first laser receiver 9 and the first laser rangefinder 8 reaches the required cutting length of the waterproof membrane sample, the first laser rangefinder 8 feeds back the measurement result to the control terminal. The control terminal combines the degree of wrinkling of the waterproof membrane with the length measured by the first laser rangefinder 8 to calculate the actual length of the wrinkled waterproof membrane sample. Subsequently, the control terminal shuts down the two first motors 4, the first laser receiver 9, and the first laser rangefinder 8, and the operator activates the two electric push rods 2 and the electric slide 6. The telescopic parts of 2 together drive the support plate 3 to move upward and reset, and the electric slide 6 drives the moving frame 7 to move upward and reset, so as to adjust the height of the support plate 3, the first motor 4, the lead screw 5 and the moving frame 7. The moving frame 7 drives the rotating wheel 14 to move upward and reset through the sliding block 10 and the connecting frame 12. Then, the operator closes the two electric push rods 2 and the electric slide 6 through the control terminal, removes the measured and marked waterproof membrane, cuts the waterproof membrane, and finally turns on the two first motors 4 through the control terminal, so that the output shafts of the two first motors 4 reverse and reset, thus resetting the device.

[0035] Example 2

[0036] Based on Example 1, such as Figure 2 and Figure 4 As shown, a rotating plate 19 is rotatably and slidably connected to the connecting frame 12. A rotating roller 20 is rotatably connected to the rotating plate 19. The rotating roller 20 is used to flatten the waterproof membrane. The surface of the rotating roller 20 is rough to increase the frictional resistance between the rotating roller 20 and the waterproof membrane. During the leftward movement of the connecting frame 12, the connecting frame 12 drives the rotating roller 20 to move to the left via the rotating plate 19. The rotating roller 20 rotates during the leftward movement. Through the movement and rotation of the rotating roller 20, the wrinkled waterproof membrane is flattened. The rotating plate 19 is equipped with a one-way gear 21 that is rotatably connected to the adjacent connecting frame 12. Figure 4 As shown, when the lower side of the rotating roller 20 is flush with the lower side of the rotating wheel 14, ... Figure 1 The top view serves as the reference for the rotation direction. When the two front one-way gears 21 rotate counter-clockwise, they can drive the adjacent rotating plate 19 to rotate; when they rotate clockwise, they do not drive the adjacent rotating plate 19 to rotate. Similarly, when the two rear one-way gears 21 rotate clockwise, they can drive the adjacent rotating plate 19 to rotate; when they rotate counter-clockwise, they do not drive the adjacent rotating plate 19 to rotate. The worktable 1 is slidably connected with racks 22 of the same number as the one-way gears 21. An electromagnetic slider can be installed on the worktable 1, which drives the racks 22 to move back and forth. When the connecting frame 12 drives the racks 22 to move back and forth, the electromagnetic slider can also drive the racks 22 to move back and forth, ensuring that the relative position of the racks 22 and the adjacent one-way gears 21 remains constant in the front-to-back direction. When the connecting frame 12 drives the racks 22 to move up and down, the thickness of the racks 22 is greater than the thickness of the adjacent one-way gears 21, ensuring that the racks 22... During the leftward movement, it engages normally with the one-way gear 21. As the rotating plate 19 moves to the left, it drives the one-way gear 21 to move to the left. When the one-way gear 21 moves to engage with the rack 22, the rack 22 drives the adjacent one-way gear 21, causing the one-way gear 21 to rotate. The rotating roller 20 at the front flips forward, and the rotating roller 20 at the rear flips backward, flattening the waterproof membrane. The rotating rollers 20 are inclined, and all rotating rollers 20 tilt from right to left towards the center of the worktable 1. The front rotating roller 20 gradually tilts backward from right to left, and the rear rotating roller 20 tilts forward from right to left. Through the movement of the rotating rollers 20, the wrinkled waterproof membrane is flattened. At the same time, the rotating rollers 20 swing, pushing the waterproof membrane from the center to both sides of the edge, flattening the wrinkles caused by the waterproof membrane during winding, storage, and transportation, ensuring the flatness of the waterproof membrane surface, and thus improving the accuracy of the waterproof membrane size measurement.

[0037] After the waterproof membrane measurement is completed, the connecting frame 12 drives the rotating wheel 14 to move upward and reset. Then, the rotating plate 19 is pulled downward so that the lower part of the rotating plate 19 is lower than the rotating wheel 14. The rotating plate 19 is rotated to restore it to its original tilt direction. When the device is used again, the connecting frame 12 moves downward so that the rotating plate 19 moves upward relative to the connecting frame 12.

[0038] Example 3

[0039] Based on Example 2, such as Figure 2 and Figures 5-7 As shown, the workbench 1 is equipped with a second motor 23 electrically connected to the control terminal. The output shaft of the second motor 23 is fixedly connected to a rotating frame 24. The rotating frame 24 consists of two rotating disks symmetrically distributed front and rear and two rotating rods symmetrically distributed vertically. Figure 1 The main view serves as the reference for the rotation direction. When the right side of the waterproof membrane is fixed using the rotating frame 24, the output shaft of the second motor 23 drives the rotating frame 24 to rotate counterclockwise. The rotating rod of the rotating frame 24 is slidably connected to two sliding rods 25 symmetrically distributed front and back. The distance between the upper and lower sliding rods 25 is L1, and the distance between the lower sliding rod 25 and the worktable 1 is L2, where L1 > L2. The portion of the waterproof membrane located between the four sliding rods 25 will not be subjected to rigid compression. The outer surface of the sliding rods 25 is rough to increase the frictional resistance between the sliding rods 25 and the waterproof membrane. Before measuring the waterproof membrane, the right side of the waterproof membrane is placed between the four sliding rods 25. Then, the second motor 23 is turned on via the control terminal. The output shaft of the second motor 23 drives the rotating frame 24 to rotate, which in turn drives the two sliding rods 25 on it to rotate. The two lower sliding rods 25 rotate to the upper side and wrap tightly around the waterproof membrane, while the two upper sliding rods 25 rotate to the lower side and wrap tightly around the waterproof membrane. Pressed firmly onto workbench 1, the right side of the waterproof membrane is fixed to ensure stability during measurement. A limit pin 2501 is fixed to the sliding rod 25. Symmetrically distributed limit frames 26 are fixed to workbench 1. The limit frames 26 are rotatably connected to the rotating disks of adjacent rotating frames 24. Limit frames 26 are provided with limit grooves 2601. The upper part of the limit groove 2601 is semi-circular, and the lower part of the limit groove 2601 slopes downwards towards the adjacent rotating disks of the rotating frame 24. When the sliding rod 25 rotates... During the movement, the sliding rod 25 drives its upper limit pin 2501 to rotate, and the limit pin 2501 slides in the corresponding limit groove 2601. As the upper limit pin 2501 flips downward, the limit pin 2501 gradually moves towards the adjacent rotating disk of the rotating frame 24. That is, the limit pin 2501 drives the adjacent sliding rod 25 to move towards the edge of the waterproof membrane, flattening the fixed edge of the waterproof membrane, ensuring the flatness of the waterproof membrane surface, and thus improving the accuracy of the waterproof membrane size measurement.

[0040] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser measuring device for waterproof membrane, comprising a worktable (1), wherein an electric push rod (2) is mounted on the worktable (1), a support plate (3) is fixedly connected to the telescopic part of the electric push rod (2), a first motor (4) symmetrically distributed is mounted on the support plate (3), a lead screw (5) is fixedly connected to the output shaft of the first motor (4), an electric slide (6) rotatably connected to the lead screw (5) and slidably connected to the worktable (1), a movable frame (7) is threadedly connected to the symmetrically distributed lead screws (5), a first laser rangefinder (8) is mounted on the electric slide (6), and a first laser receiver (9) is mounted on the movable frame (7), characterized in that, It also includes a number of sliding blocks (10) spaced apart, the sliding blocks (10) being slidably connected to the moving frame (7), the sliding blocks (10) being equipped with pressure sensors (11), the sliding blocks (10) being slidably connected to a connecting frame (12), the connecting frame (12) being fixedly connected to the adjacent pressure sensors (11) with a first elastic element (13), and the connecting frame (12) being rotatably connected to a rotating wheel (14).

2. The laser measuring device for waterproof membrane according to claim 1, characterized in that, Two connecting frames (12) located on both sides of the movable frame (7) are fixedly connected to connecting blocks (15), and a marker pen (16) is slidably connected to the connecting blocks (15). A second elastic element (17) is fixedly connected between the marker pen (16) and the adjacent connecting block (15).

3. The laser measuring device for waterproof membrane according to claim 2, characterized in that, The movable frame (7) is rotatably connected to an adjusting rod (18), and the sliding block (10) is threadedly connected to the adjusting rod (18). The two connecting frames (12) located on both sides of the movable frame (7) are respectively equipped with a second laser rangefinder (1801) and a second laser receiver (1802).

4. The laser measuring device for waterproof membrane according to claim 3, characterized in that, The central axis of the marker (16) is coplanar with the central axis of the rotating wheel (14), and the distance between the central axes of the two markers (16) is equal to the distance between the second laser rangefinder (1801) and the second laser receiver (1802).

5. A laser measuring device for waterproof membranes according to claim 4, characterized in that, The connecting frame (12) is rotatably and slidably connected to a rotating plate (19), and the rotating plate (19) is rotatably connected to a rotating roller (20), which is used to flatten the waterproof membrane.

6. The laser measuring device for waterproof membranes according to claim 5, characterized in that, The rotating plate (19) is equipped with a one-way gear (21) that is rotatably connected to the adjacent connecting frame (12). The workbench (1) is slidably connected with a number of racks (22) that are the same as the number of the one-way gears (21). The thickness of the racks (22) is greater than the thickness of the adjacent one-way gears (21). The racks (22) are used to drive the adjacent one-way gears (21).

7. A laser measuring device for waterproof membranes according to claim 6, characterized in that, The rotating rollers (20) are inclined, and all the rotating rollers (20) gradually tilt towards the center of the worktable (1) from the point near the electric carriage (6) to the point far away.

8. A laser measuring device for waterproof membranes according to claim 7, characterized in that, The workbench (1) is equipped with a second motor (23), and the output shaft of the second motor (23) is fixedly connected to a rotating frame (24).

9. A laser measuring device for waterproof membranes according to claim 8, characterized in that, The rotating frame (24) consists of symmetrically distributed rotating disks and symmetrically distributed rotating rods. The rotating rods of the rotating frame (24) are slidably connected to symmetrically distributed sliding rods (25), and the outer surface of the sliding rods (25) is a rough surface.

10. A laser measuring device for waterproof membranes according to claim 9, characterized in that, The sliding rod (25) is fixedly connected to a limiting pin (2501), and the worktable (1) is fixedly connected to symmetrically distributed limiting frames (26). The limiting frames (26) are rotatably connected to the rotating disk of the adjacent rotating frame (24). The limiting frames (26) are provided with limiting grooves (2601), and the limiting pins (2501) slide in the corresponding limiting grooves (2601).

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