A device for detecting deflection of a building structural member

Abstract

The application discloses a device for detecting deflection of a building structure component, and relates to the technical field of deflection detection, which comprises a measuring box, a rotating motor, a rotating mirror, a swing motor, a vibrating mirror, a laser frame and a laser source are arranged in the measuring box, a three-dimensional high-precision gyroscope and a mounting disc are fixedly arranged in the measuring box, the rotating motor is fixedly arranged on the mounting disc, the driving end of the rotating motor is fixedly connected with the rotating mirror, two vertical rods are fixedly arranged on the mounting disc, the vibrating mirror is rotatably arranged between the two vertical rods and is fixedly connected with the driving end of the swing motor. The device has the advantages that the eccentric rotation of the abutting roller and the cooperation of the horizontal compensation spring and the reset arc plate can realize automatic reduction and preliminary compensation of the deflection in the horizontal direction; meanwhile, the cooperation of the vertical compensation spring, the three-dimensional high-precision gyroscope and the locking motor can quickly realize automatic reduction and preliminary compensation of the swing in the front-back direction and the vibration in the vertical direction.

Description

Technical Field

[0001] This invention relates to the field of deflection detection technology, and more particularly to a device for detecting the deflection of building structural components. Background Technology

[0002] Currently, the commonly used method for detecting the deflection of building structural components is optical non-contact measurement. This method scans the structural components to create images that can be directly viewed with the naked eye. These images can be directly compared with preset images in the system, providing a more intuitive result. In practice, these devices are held directly by the operator and incorporate a posture compensation structure to mitigate the impact of vibration or improper horizontal holding on measurement accuracy. However, in actual use, vibrations can occur, such as those generated when walking to a suitable position and then stopping, or slight vibrations from the body while holding the device. Furthermore, the operator cannot guarantee a perfectly horizontal position. All these factors can affect measurement accuracy. Although a posture compensation structure is incorporated, this type of three-dimensional posture compensation structure has the following shortcomings: it does not automatically compensate for vibration-induced deflection at the moment vibration occurs, resulting in a time lag; and it does not address the issue of improper horizontal holding. Therefore, measurement accuracy needs improvement. To address these issues, we propose a device for detecting the deflection of building structural components. Summary of the Invention

[0003] The purpose of this invention is to solve the problems mentioned in the background art by providing a device for detecting the deflection of building structural components.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A device for detecting the deflection of building structural components includes a measuring box. The measuring box contains a rotating motor, a rotating mirror, a swing motor, a galvanometer, a laser frame, and a laser source. A three-dimensional high-precision gyroscope and a mounting plate are fixedly installed inside the measuring box. The rotating motor is fixedly mounted to the mounting plate, and the drive end of the rotating motor is fixedly connected to the rotating mirror. Two vertical rods are fixedly mounted on the mounting plate, and the galvanometer is rotatably mounted between the two vertical rods and fixedly connected to the drive end of the swing motor. The swing motor is fixedly mounted on one side of one of the vertical rods.

[0006] A cylindrical compensation seat is slidably placed inside the mounting plate, and a steering compensation component, a steering deceleration compensation component, and a steering restraint compensation component are installed on the mounting plate.

[0007] The compensation seat is equipped with a compensation plate by means of a vibration compensation component, and the lower end of the cylinder is fixedly connected to the compensation plate. Multiple fixed components and synchronous running components are rotatably installed on the compensation seat.

[0008] In the aforementioned device for detecting the deflection of building structural components, the steering compensation component includes a compensation motor and a connecting frame. The lower surface of the mounting plate is rotatably mounted with a compensation motor that cooperates with a three-dimensional high-precision gyroscope. The drive end of the compensation motor rotatably passes through the mounting plate and is fixedly mounted with the connecting frame, and one end of the connecting frame is fixedly connected to the upper surface of the compensation seat.

[0009] In the aforementioned device for detecting the deflection of building structural components, the steering mitigation compensation component includes horizontal compensation springs and a return arc plate. Multiple horizontal compensation springs are fixedly installed on both inner walls of the mounting plate, and multiple horizontal compensation springs on the same side are jointly fixedly installed with a return arc plate that cooperates with the compensation seat.

[0010] In the aforementioned device for detecting the deflection of building structural components, the steering and clamping compensation component includes a mounting groove, a mounting frame, and a clamping roller. The mounting plate has multiple mounting grooves, and a mounting frame is fixedly installed on each mounting groove. A clamping roller that cooperates with the compensation seat is eccentrically mounted on the lower end of each mounting frame.

[0011] In the aforementioned device for detecting the deflection of building structural components, the vibration compensation component includes multiple vertical compensation springs, and multiple vertical compensation springs are fixedly installed on the compensation seat, with one end of each vertical compensation spring being fixedly connected to the compensation plate.

[0012] In the aforementioned device for detecting the deflection of building structural components, the fixing component includes a shaft, a fixing rod, and a fixing roller. Multiple shafts are rotatably mounted on the compensation seat, and two fixing rods are fixedly mounted on each shaft. The shortest straight-line distance between the two fixing rods is equal to the thickness of the compensation plate, and a fixing roller is fixedly mounted between the corresponding two fixing rods.

[0013] In the aforementioned device for detecting the deflection of building structural components, the synchronous operating component includes a gear, a gear ring, and a locking motor. A gear is fixedly installed on each shaft. A gear ring is rotatably installed on the compensation seat, and the gear ring meshes with multiple gears simultaneously. A locking motor is fixedly installed on the compensation seat, and the drive end of the locking motor rotatably passes through the compensation seat and is fixedly connected to one of the shafts.

[0014] In the aforementioned device for detecting the deflection of building structural components, an elastic ring that mates with a cylinder is fixedly installed on the compensation seat.

[0015] Each of the aforementioned fixing rods has a strip groove on the side near the compensation plate, and an elastic pad is fixedly installed in the strip groove;

[0016] The fixed roller is made of an elastic material.

[0017] Compared with existing technologies, the advantages of this invention are:

[0018] 1. A rotatable compensation motor and compensation seat are set up so that when horizontal deflection occurs, the eccentric rotation of the abutment roller can initially reduce the deflection. At the same time, with the cooperation of the horizontal compensation spring and the return arc plate, the deflection can be further effectively reduced, and the automatic reduction and initial compensation of the deflection in this direction can be achieved automatically.

[0019] 2: The vertical compensation spring can directly reduce the swaying in the front-back direction and the vibration in the vertical direction. At the same time, with the cooperation of the three-dimensional high-precision gyroscope and the locking motor, the clamping and fixing of the compensation plate can be quickly released when the swaying in the front-back direction and the vertical vibration occur, so as to automatically reduce and initially compensate for the deflection in that direction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a device for detecting the deflection of building structural components proposed in this invention.

[0021] Figure 2 for Figure 1 Another perspective and structural diagram after removing the lid;

[0022] Figure 3 for Figure 2 An enlarged structural diagram of the middle mounting plate section from another perspective;

[0023] Figure 4 for Figure 3 A structural diagram from another perspective;

[0024] Figure 5 for Figure 3 Enlarged schematic diagram of the structure after removing the mounting plate, rotating mirror, swing motor, galvanometer, and rotary motor;

[0025] Figure 6 for Figure 5 A schematic diagram of the structure after removing the compensation seat;

[0026] Figure 7 for Figure 5 A schematic diagram of the structure of the central compensation seat, cylinder, and clamping roller;

[0027] Figure 8 for Figure 7 A schematic diagram of the structure from another perspective after removing the compensation seat and the clamping roller;

[0028] Figure 9 for Figure 8 Another structural schematic diagram of the central toothed ring section;

[0029] Figure 10 for Figure 3 A structural diagram of a single installation disk from another perspective;

[0030] Figure 11 for Figure 10 Cross-sectional view of the installation disk.

[0031] In the diagram: 1. Measuring box; 2. Three-dimensional high-precision gyroscope; 3. Mounting plate; 4. Rotating motor; 5. Rotating mirror; 6. Oscillating motor; 7. Galvanometer; 8. Circular groove one; 9. Compensation seat; 10. Cylinder; 11. Compensation motor; 12. Connecting frame; 13. Deflection groove; 14. Horizontal compensation spring; 15. Reset arc plate; 16. Mounting groove; 17. Mounting frame; 18. Pressing roller; 19. Laser frame; 20. Laser source; 21. Vertical compensation spring; 22. Compensation plate; 23. Circular groove two; 24. Shaft; 25. Fixing rod; 26. Fixing roller; 27. Gear; 28. Gear ring; 29. ​​Locking motor; 30. Elastic ring. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Reference Figures 1-11A device for detecting the deflection of building structural components includes a measuring box 1 with a cover. The cover can be installed by a rotating snap-fit ​​mechanism. The portion of the measuring box 1 away from the rotating end and the box body itself (excluding the cover) can have their stability improved by adding other structures, such as threaded holes on the cover and threaded grooves on the box body. When rotated and snapped, the threaded grooves correspond to the threaded holes, and the two can be fixed directly using a threaded rod, such as a bolt. This part is a common existing technology and structure, and therefore is not shown in the figure. A handheld support is fixedly installed at the lower end of the measuring box 1. The handheld support is existing technology and is not shown in the figure. The measuring box 1 also includes a fixedly installed three-dimensional high-precision gyroscope 2. This is an existing technology used to collect real-time three-dimensional attitude angle data during the overall use of the equipment. Here, the main focus is on collecting deflection (horizontal direction) data. A mounting plate 3 is fixedly installed inside the measuring box 1. A rotating motor 4 is fixedly installed on the lower surface of the mounting plate 3. A motor frame (not shown in the figure) is fixedly installed on the lower surface of the mounting plate 3. A compensation motor 11 is rotatably installed on the motor frame between the motor frame and the mounting plate 3. The motor frame can be composed of two short rods and a disc. The short rods are fixed to the disc and the lower surface of the mounting plate 3. The compensation motor 11 is rotatably installed on the disc. At the same time, a return spring that cooperates with the compensation motor 11 is fixed on the disc or short rod. At this time, a mounting groove (not shown in the figure) that cooperates with the rotating motor 4 and the motor frame needs to be opened on the bottom wall of the measuring box 1.

[0034] The drive end of the rotating motor 4 rotates through the mounting plate 3 and is fixedly mounted with a rotating mirror 5. Two vertical rods are fixedly mounted on the mounting plate 3. An oscillating motor 6 is fixedly mounted on the outside of one of the vertical rods. The drive end of the oscillating motor 6 rotates through the vertical rod and is fixedly mounted with a galvanometer 7. One side of the galvanometer 7 is rotatably mounted on the other vertical rod. The rotation of the rotating mirror 5 and the reciprocating oscillation of the galvanometer 7 within a certain angle work together. The rotating mirror 5 is multi-faceted. Each rotation through one face is equivalent to scanning a line of point cloud. The galvanometer 7 is responsible for scanning in the vertical direction. Through the precise cooperation of the rotating mirror 5 and the galvanometer 7, scanning from top to bottom can scan the graphic components of the building structure. The structure is designed for easy visual observation. The measuring box 1 is also equipped with a rotating mirror angle encoder, a galvanometer deflection voltage value, a laser ranging module, and a display. These three components, together with the rotating mirror 5 and the galvanometer 7, calculate the three-dimensional coordinates (x, y, z) of each point using the rotating mirror angle encoder and the galvanometer deflection voltage value. The display then constructs the scanned image. This part is existing technology and has been widely used, such as in automotive scanning radar, so it will not be elaborated here. The measuring box 1 also has an optical window, which can be made of coated glass. It has high light transmittance and dustproof and anti-fog effects, allowing the laser to pass through the measuring box 1 for measurement.

[0035] Reference Figures 1-11 The mounting plate 3 has a circular groove 8 and a deflection groove 13, which are connected. A compensation seat 9 is slidably placed in the deflection groove 13. The compensation seat 9 can slide within the deflection groove 13 (the thickness of the compensation seat 9 is less than or equal to the depth of the deflection groove 13). A cylinder 10 is mounted on the compensation seat 9. The drive end of the compensation motor 11 rotates through the mounting plate 3 and is fixedly mounted to the connecting frame 12. The connecting frame 12 consists of a crossbar and a short shaft. One end of the crossbar is fixedly connected to the drive end of the compensation motor 11, and the other end is fixedly connected to the short shaft. The lower end of the short shaft is fixed to the upper surface of the compensation seat 9. The end face shape of the deflection groove 13 is specifically referred to Figure 11 The compensation seat 9 can slide to a certain extent within the deflection groove 13. Multiple horizontal compensation springs 14 are fixedly installed on both sides of the inner wall of the deflection groove 13. A reset arc plate 15 is fixedly installed on the corresponding side of the horizontal compensation spring 14. The reset arc plate 15 is slidably disposed within the deflection groove 13, and the shape of the reset arc plate 15 matches the compensation seat 9. During the sliding process, the compensation seat 9 can better fit with the reset arc plate 15 on the corresponding side. If it continues to move, it will squeeze the horizontal compensation spring 14, thereby initially damping the horizontal deflection (such as rapid turning).

[0036] Reference Figures 1-11 The mounting plate 3 has multiple mounting slots 16 that mate with the compensation seat 9, and the mounting slots 16 are connected to the deflection slots 13. A mounting bracket 17 is fixedly installed in the mounting slot 16, and the end face of the mounting bracket 17 is n-shaped (refer to...). Figure 5 The lower end of the mounting bracket 17 is rotatably mounted to the clamping roller 18. The clamping roller 18 is eccentrically positioned on the mounting bracket 17. In the initial state, the movement of the compensation seat 9 can contact the clamping roller 18 on the corresponding side before it moves (at this time, the clamping roller 18 is like...). Figure 7 As shown, when it continues to move, it will drive the clamping roller 18 to rotate eccentrically under the action of friction. At this time, the vertical squeezing force generated by the clamping roller 18 on the compensation seat 9 will continue to increase, which can also play an elastic slowing effect on the sliding of the compensation seat 9.

[0037] A laser frame 19 is fixedly installed on the upper end of the cylinder 10, and a laser source 20 is fixedly installed on the laser frame 19. The laser source 20 is existing technology and will not be described in detail here.

[0038] Reference Figures 1-11The compensation seat 9 has a circular cavity and a circular groove 23 connected to it. The diameter of the circular groove 23 is larger than the diameter of the cylinder 10. An elastic ring 30 that cooperates with the cylinder 10 is fixed on the inner wall of the circular groove 23. The elastic ring 30 allows the cylinder 10 to deflect at a certain angle within the circular groove 23, so that the lower end of the cylinder 10 is located in the circular cavity and a compensation plate 22 is fixedly installed thereon. Multiple vertical compensation springs 21 are fixedly installed at equal intervals along the circumference on both the upper and lower surfaces of the compensation plate 22 (three are shown on each of the upper and lower surfaces in the figure for illustration). The lower end of the lower vertical compensation spring 21 is flush with the bottom wall of the circular cavity. The upper end of the vertical compensating spring 21 is fixed to the top wall of the circular cavity. Multiple shafts 24 are rotatably installed at equal intervals along the circumference inside the circular cavity. Two fixed rods 25 are fixedly installed on each shaft 24. At this time, the two fixed rods 25 cooperate to provide a vertical limiting clamping effect on the compensating plate 22. At the same time, an elastic pad (such as one made of rubber material) can be installed on the side of the fixed rod 25 near the compensating plate 22 (or a strip groove can be opened on the fixed rod 25, and then the elastic pad can be installed in the strip groove). The elasticity of the rubber pad can better provide a vertical limiting clamping effect on the compensating plate 22.

[0039] A fixed roller 26 is fixedly installed between the two fixed rods 25. The fixed roller 26 can be made of elastic material (such as rubber). When multiple fixed rollers 26 contact the compensation plate 22, they can apply a horizontal limiting clamping effect to it. At the same time, the end of the fixed rod 25 away from the shaft 24 can be set to be arc-shaped (not shown in the figure), so as to facilitate clamping the compensation plate 22.

[0040] A locking motor 29 is fixedly installed on the compensation seat 9. The drive end of the locking motor 29 rotates through the compensation seat 9 and is fixedly connected to one of the shafts 24. A gear 27 is fixedly installed on each shaft 24. A gear ring 28 is rotatably installed in the circular cavity. The gear ring 28 meshes with multiple gears 27 at the same time. At the same time, a vertical upper limit action can be applied to the gear ring 28 to ensure that it is always meshed with the gears 27. For example, an annular groove (not shown in the figure) can be opened on the inner wall of the circular cavity, and then the outer diameter of the gear ring 28 can be set in the annular groove.

[0041] The vertical compensation spring 21 can directly reduce vibration in the vertical direction. This reduction can directly achieve the corresponding attitude compensation effect. At the same time, the fixation between the cylinder 10 and the laser frame 19 can be replaced. The servo motor can control the cooperation between the laser frame 19 and the corresponding structure. For example, the servo motor drives the threaded rod to move, and the threaded rod can drive a U-shaped frame rod to move up and down. The laser frame 19 is installed on the U-shaped frame rod. At the same time, a limit is added to the U-shaped frame rod and the threaded rod or the cylinder 10, so that the U-shaped frame rod can move in the vertical direction relative to the cylinder 10. Thus, with the cooperation of the three-dimensional high-precision gyroscope 2, when vertical vibration occurs, attitude compensation in that direction is further performed.

[0042] The vertical compensation spring 21 can directly reduce the swaying in the front-to-back direction. At this time, the laser frame 19 can be rotated and installed on the U-shaped frame rod in a controllable rotation manner. The servo motor can be used as the power source to control the rotation and can be directly used in conjunction with the three-dimensional high-precision gyroscope 2 to further perform attitude compensation in this position.

[0043] The three-dimensional high-precision gyroscope 2 detects the attitude angle deviation of the whole in three orthogonal axes (pitch, roll, and yaw) in real time. Its output signal is processed by the controller through a preset PID control algorithm (existing algorithm) to generate two compensation commands: one drives the compensation motor 11 to perform dynamic balance adjustment, and the other controls the locking motor 29 to lock the reference position, realizing closed-loop feedback control of the overall attitude. Among them, the compensation motor 11 can be a brushless DC motor for high-frequency fine adjustment, and the locking motor 29 can be a stepper motor to complete rigid positioning. The two can be directly connected and work together through a harmonic reducer to ensure the stability of the overall operation. This part is existing technology and will not be described in detail here.

[0044] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0045] The working principle of this invention is as follows;

[0046] Overall Analysis: During the movement of the handheld unit, the forces acting on the unit mainly come from the bumps and rapid changes of direction during the walking process. The main force of the bumps can be decomposed into vertical and horizontal forces, and there is also some force from the back-and-forth swinging. The force from the rapid changes of direction is mainly horizontal.

[0047] Horizontal force mitigation and attitude compensation: At this time, the compensation seat 9, compensation motor 11, connecting frame 12, and the entire structure set on the compensation seat 9 are all subjected to rotational force. When the compensation seat 9 deflects, it will first contact the clamping roller 18. Under the action of friction, the clamping roller 18 will be driven to rotate eccentrically. This eccentric rotation can initially mitigate the deflection. At the same time, it will continue to move and contact the reset arc plate 15. With the cooperation of the horizontal compensation spring 14, the deflection will be further mitigated. Meanwhile, the three-dimensional high-precision gyroscope 2 can collect real-time data of the three-dimensional attitude angle vibration of the laser radar. The controller (existing technology) controls the compensation motor 11 to work. The operation of the compensation motor 11 drives the compensation seat 9 to rotate through the connecting frame 12 (a reverse rotation related to the attitude vibration angle, used to compensate for the error caused by the horizontal rotation).

[0048] Vertical force mitigation and attitude compensation: When the three-dimensional high-precision gyroscope 2 detects three-dimensional attitude angle vibration, it controls the locking motor 29 to work. The locking motor 29 works by cooperating with gear 27 and gear ring 28 to make multiple shafts 24 rotate simultaneously. The rotation of shafts 24 can make the fixed rod 25 and fixed roller 26 move away from the compensation plate 22, thereby quickly releasing the clamping and fixing of the compensation plate 22. Then, when the laser source 20 drives the cylinder 10 to move in the vertical direction under the action of vibration, it will directly exert a force on the vertical compensation spring 21 (one side is compression and the other side is tension). At this time, the vertical vibration force on the cylinder 10 can be directly mitigated. This mitigation can directly play a certain attitude compensation role.

[0049] Slowing down and attitude compensation in the forward and backward directions: When the three-dimensional high-precision gyroscope 2 detects three-dimensional attitude angle vibration, the control locking motor 29 is activated to quickly release the clamping fixation on the compensation plate 22. At this time, the sway in the forward and backward directions can also be directly slowed down under the action of the vertical compensation spring 21. This slowing down can directly play a certain attitude compensation role.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for detecting deflection of a building structure member, comprising a measuring box (1), a rotating motor (4), a rotating mirror (5), a swing motor (6), a swing mirror (7), a laser frame (19), and a laser source (20) installed in the measuring box (1), characterized in that, The three-dimensional high-precision gyroscope (2) is fixedly installed in the measuring box (1), and the mounting disc (3) is fixedly arranged on the three-dimensional high-precision gyroscope (2), and the rotating motor (4) is fixedly arranged on the mounting disc (3), and the driving end of the rotating motor (4) is fixedly connected with the rotating mirror (5), and two vertical rods are fixedly arranged on the mounting disc (3), and the vibrating mirror (7) is rotatably arranged between the two vertical rods and is fixedly connected with the driving end of the swing motor (6), and the swing motor (6) is fixedly arranged on one side of one of the vertical rods. The mounting disc (3) is slidably arranged with a compensation seat (9) provided with a cylinder (10), and the mounting disc (3) is provided with a turning compensation component, a turning slowing compensation component and a turning abutting compensation component. The compensation seat (9) is provided with a compensation plate (22) through a vibration compensation component, and the lower end of the cylinder (10) is fixedly connected with the compensation plate (22), and the compensation seat (9) is rotatably provided with a plurality of fixing components and synchronous operation components. The turning compensation component comprises a compensation motor (11) and a connecting frame (12), and the lower surface of the mounting disc (3) is rotatably provided with the compensation motor (11) matched with the three-dimensional high-precision gyroscope (2), and the driving end of the compensation motor (11) is rotatably penetrated through the mounting disc (3) and is fixedly provided with the connecting frame (12), and one end of the connecting frame (12) is fixedly connected with the upper surface of the compensation seat (9). The turning slowing compensation component comprises a horizontal compensation spring (14) and a reset arc plate (15), and a plurality of horizontal compensation springs (14) are fixedly arranged on the inner walls of the two sides of the mounting disc (3), and a reset arc plate (15) matched with the compensation seat (9) is fixedly arranged on the horizontal compensation springs (14) on the same side. The turning abutting compensation component comprises a mounting groove (16), a mounting frame (17) and an abutting roller (18), and a plurality of mounting grooves (16) are formed in the mounting disc (3), and one mounting frame (17) is fixedly arranged in each mounting groove (16), and one abutting roller (18) matched with the compensation seat (9) is eccentrically rotatably arranged at the lower end of each mounting frame (17).

2. A device for detecting deflection of a structural member of a building structure according to claim 1, wherein The vibration compensation component comprises a plurality of vertical compensation springs (21), and the compensation seat (9) is fixedly provided with a plurality of vertical compensation springs (21), and one end of each vertical compensation spring (21) is fixedly connected with the compensation plate (22).

3. A device for detecting deflection of a structural member of a building structure according to claim 1, wherein The fixing component comprises a shaft body (24), a fixed rod (25) and a fixed roller (26), and a plurality of shaft bodies (24) are rotatably arranged on the compensation seat (9), and two fixed rods (25) are fixedly arranged on each shaft body (24), and the shortest straight line distance between the two fixed rods (25) is equal to the thickness of the compensation plate (22), and one fixed roller (26) is fixedly arranged between the corresponding two fixed rods (25).

4. A device for detecting deflection of a structural member of a building structure according to claim 3, wherein The synchronous operation component comprises gears (27), a tooth ring (28) and a locking motor (29), one gear (27) is fixedly installed on each shaft body (24), the tooth ring (28) is rotatably installed on the compensation seat (9) and is engaged with the gears (27) at the same time, the locking motor (29) is fixedly installed on the compensation seat (9), and the driving end of the locking motor (29) penetrates through the compensation seat (9) and is fixedly connected with one shaft body (24).

5. A device for detecting deflection of a structural member of a building structure according to claim 4, wherein An elastic ring (30) matched with the cylinder (10) is fixedly installed on the compensation seat (9); A strip-shaped slot is formed in the side of each fixed rod (25) close to the compensation plate (22), and an elastic pad is fixedly installed in the strip-shaped slot; The fixed roller (26) is made of an elastic material.

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