Bridge span structure attitude monitoring device

Abstract

The utility model relates to the technical field of bridge building auxiliary equipment, and discloses a bridge span structure posture monitoring device which comprises a first mounting seat, a second mounting seat and an electronic prompter, and the first mounting seat and the second mounting seat are arranged on the two opposite sides of a bridge expansion joint respectively; a searchlighting plate, a first horizontal detection device and a first horizontal adjusting piece are arranged on the first mounting seat; a first displacement sensor, a second displacement sensor, a third displacement sensor, a second horizontal detection device and a second horizontal adjusting part are arranged on the second mounting seat, the searchlighting plate is provided with a detected end, the first displacement sensor is arranged opposite to the side face of the detected end, and the second displacement sensor is arranged opposite to the end face of the detected end; the third displacement sensor is arranged opposite to the top surface or the bottom surface of the detected end; and the electronic prompter is electrically connected with the first displacement sensor, the second displacement sensor and the third displacement sensor. The bridge span structure attitude monitoring device can be used for strictly monitoring the attitude of a bridge, and the monitoring result is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction auxiliary equipment, in particular to a bridge span structure posture monitoring device. Background Art

[0002] In the bridge jacking support replacement operation, PLC-controlled hydraulic jacking equipment is usually used to perform synchronous overall jacking of the entire span (link).

[0003] However, when lifting the entire span of a bridge with a large slope, there are risks of safety accidents such as bridge slippage and torsion. In order to obtain bridge posture data in the first time, closely monitor the bridge posture, and control risks, it is necessary to provide a bridge span structure posture monitoring device. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a bridge span structure posture monitoring device, which can closely monitor the bridge posture and the monitoring result is reliable.

[0005] In order to solve the above technical problems, the utility model provides a bridge span structure posture monitoring device, comprising a first mounting seat, a second mounting seat and an electronic prompter, wherein the first mounting seat and the second mounting seat are respectively arranged on opposite sides of the bridge expansion joint;

[0006] The first mounting seat is provided with a searchlight, a first level detection device for detecting the levelness of the first mounting seat, and a first level adjustment member for adjusting the levelness of the first mounting seat;

[0007] The second mounting seat is provided with a first displacement sensor, a second displacement sensor, a third displacement sensor, a second level detection device for detecting the levelness of the second mounting seat, and a second level adjustment member for adjusting the levelness of the second mounting seat; the searchlight is provided with a detected end; the first displacement sensor is arranged opposite to the side surface of the detected end; the second displacement sensor is arranged opposite to the end surface of the detected end; and the third displacement sensor is arranged opposite to the top surface or the bottom surface of the detected end;

[0008] The electronic prompter is electrically connected to the first displacement sensor, the second displacement sensor and the third displacement sensor.

[0009] As an improvement of the above solution, the first displacement sensor, the second displacement sensor, and the third displacement sensor are all contact distance measurement sensors.

[0010] As an improvement of the above solution, the first mounting seat includes a first seat body and a first mounting plate, the first mounting plate is movably connected to the first seat body, the first level detection device and the first level adjustment member are both arranged on the first seat body, and the searchlight is arranged on the first mounting plate;

[0011] The second mounting seat includes a second seat body and a second mounting plate, the second mounting plate is movably connected to the second seat body, the second level detection device and the second level adjustment member are both arranged on the second seat body, and the first displacement sensor, the second displacement sensor, and the third displacement sensor are all arranged on the second mounting plate.

[0012] As an improvement of the above solution, the first mounting plate is provided with a first lateral extension portion extending laterally and a first vertical extension portion extending vertically, the first lateral extension portion is perpendicular to the first vertical extension portion, the first lateral extension portion is connected to the first seat body, and the searchlight is connected to the first vertical extension portion;

[0013] The second mounting plate is provided with a second lateral extension portion extending laterally and a second vertical extension portion extending vertically, the second lateral extension portion is perpendicular to the second vertical extension portion, the second lateral extension portion is connected to the second seat body, the second vertical extension portion is provided with a third mounting plate and a fourth mounting plate connected thereto, the third displacement sensor is connected to the fourth mounting plate, the first displacement sensor is connected to the third mounting plate, and the second displacement sensor is connected to the second vertical extension portion, or

[0014] The first displacement sensor and the second displacement sensor are both connected to the third mounting plate.

[0015] As an improvement of the above solution, the first transversely extending portion or the first seat body is provided with a first strip hole extending longitudinally, a first locking member for fixing the first mounting plate to the first seat body is provided in the first strip hole, and the first locking member can move along the extension direction of the first strip hole;

[0016] The second transverse extension portion or the second seat body is provided with a second strip hole extending longitudinally, and a second locking piece for fixing the second mounting plate and the second seat body is provided in the second strip hole, and the second locking piece can move along the extension direction of the second strip hole.

[0017] As an improvement of the above solution, the first vertical extension portion is provided with a through hole that is compatible with the searchlight and extends laterally, the searchlight is inserted into the through hole, and the first vertical extension portion is provided with a fifth locking piece for abutting against the top surface of the searchlight.

[0018] As an improvement of the above solution, when the first displacement sensor and the second displacement sensor are both connected to the third mounting plate, the third mounting plate includes a third lateral extension portion extending laterally and a longitudinal extension portion extending longitudinally, the third lateral extension portion is perpendicular to the longitudinal extension portion, the first displacement sensor is arranged on the third lateral extension portion, and the second displacement sensor is arranged on the longitudinal extension portion;

[0019] When the first displacement sensor is connected to the third mounting plate, the second displacement sensor is connected to the second vertical extension portion, the third mounting plate is provided with a third strip hole extending laterally, and a third locking piece for fixing the third mounting plate and the second vertical extension portion is provided in the third strip hole, and the third locking piece can move along the extension direction of the third strip hole.

[0020] As an improvement of the above scheme, the fourth mounting plate includes a fourth lateral extension portion extending laterally and a third vertical extension portion extending vertically, the fourth lateral extension portion is perpendicular to the third vertical extension portion, the third displacement sensor is arranged on the fourth lateral extension portion, the third vertical extension portion is provided with a fourth strip hole extending vertically, the fourth strip hole is provided with a fourth locking piece for fixing the fourth mounting plate to the second vertical extension portion, and the fourth locking piece can move along the extension direction of the fourth strip hole.

[0021] As an improvement of the above-mentioned scheme, one side of the bridge expansion joint is a lifting beam, and the other side is a reference beam. The lifting beam is provided with a first metal bracket opposite to the bridge expansion joint, and the reference beam is provided with a second metal bracket opposite to the bridge expansion joint. The first mounting seat is magnetically connected to the first metal bracket through a first magnetic connector, and the second mounting seat is magnetically connected to the second metal bracket through a second magnetic connector.

[0022] As an improvement of the above solution, the first base body is provided with a first mounting groove, the first mounting groove passes through the bottom surface of the first base body, and the first magnetic connection member is provided in the first mounting groove;

[0023] The second base body is provided with a second mounting groove, the second mounting groove passes through the bottom surface of the second base body, and the second magnetic connection member is arranged in the second mounting groove;

[0024] The first mounting seat is arranged on the top of the first metal bracket, the second mounting seat is arranged on the top of the second metal bracket, and the detected end of the searchlight is arranged directly above the expansion joint of the bridge.

[0025] The implementation of this utility model has the following beneficial effects:

[0026] The utility model discloses a bridge span structure posture monitoring device. A searchlight, a first level detection device, and a first level adjustment member are arranged on a first mounting seat, and a first displacement sensor, a second displacement sensor, a third displacement sensor, a second level detection device, and a second level adjustment member are arranged on a second mounting seat. The first mounting seat and the second mounting seat are respectively arranged on opposite sides of a bridge expansion joint. During the jacking process of a bridge on one side of the bridge expansion joint, the detected end of the searchlight opposite to the second mounting seat has its three adjacent surfaces monitored for displacement by the first displacement sensor, the second displacement sensor, and the third displacement sensor, respectively, so as to realize real-time monitoring of displacement in the horizontal, longitudinal, and vertical directions during the jacking process of the bridge. For a bridge with a slope, the first level adjustment member and the first level detection device are used to ensure that the first mounting seat is installed horizontally, and the second level adjustment member and the second level detection device are used to ensure that the second mounting seat is installed horizontally, so that the displacement monitoring data of the first displacement sensor, the second displacement sensor, and the third displacement sensor will not be too large or too small, and the monitoring result is more accurate and reliable. The bridge posture can be closely monitored through an electronic prompter to control risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a first embodiment of a bridge span structure posture monitoring device of the utility model;

[0028] Figure 2 yes Figure 1 A top view of

[0029] Figure 3 yes Figure 1 Schematic diagram of the installation structure of the bridge span structure posture monitoring device installed on the bridge. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0031] like Figure 1 and Figure 2As shown, the utility model discloses an embodiment of a bridge span structure posture monitoring device, comprising a first mounting seat 1, a second mounting seat 2 and an electronic prompter (not shown), wherein the first mounting seat 1 and the second mounting seat 2 are respectively arranged on opposite sides of the expansion joint of the bridge; the first mounting seat 1 is provided with a searchlight 3, a first level detection device 14 for detecting the level of the first mounting seat 1, and a first level adjustment member 15 for adjusting the level of the first mounting seat 1, and the searchlight 3 is provided with a detected end; the second mounting seat 2 is provided with a first displacement sensor 4, a second displacement sensor 5, a third displacement sensor 6, a second level detection device 24 for detecting the level of the second mounting seat 2, and a second level adjustment member 25 for adjusting the level of the second mounting seat 2, the first displacement sensor 4 is arranged opposite to the side surface of the detected end, the second displacement sensor 5 is arranged opposite to the end surface of the detected end, the third displacement sensor 6 is arranged opposite to the top surface or the bottom surface of the detected end, and the electronic prompter is electrically connected to the first displacement sensor 4, the second displacement sensor 5 and the third displacement sensor 6.

[0032] In this embodiment, a searchlight 3, a first horizontal detection device 14, and a first horizontal adjustment member 15 are arranged on the first mounting seat 1, and a first displacement sensor 4, a second displacement sensor 5, a third displacement sensor 6, a second horizontal detection device 24, and a second horizontal adjustment member 25 are arranged on the second mounting seat 2. The first mounting seat 1 and the second mounting seat 2 are respectively arranged on opposite sides of the bridge expansion joint. During the bridge jacking process on one side of the bridge expansion joint, the three adjacent surfaces of the detected end of the searchlight 3 opposite to the second mounting seat 2 are respectively measured by the first displacement sensor 4, the second displacement sensor 5, the third displacement sensor 6, the second horizontal detection device 24, and the second horizontal adjustment member 25. The sensor 6 monitors the displacement to realize real-time monitoring of the displacement in the lateral, longitudinal and vertical directions during the bridge jacking process. For a bridge with a slope, the first horizontal adjustment member 15 and the first horizontal detection device 14 are used to ensure that the first mounting seat 1 is installed horizontally, and the second horizontal adjustment member 25 and the second horizontal detection device 24 are used to ensure that the second mounting seat 2 is installed horizontally, so that the displacement monitoring data of the first displacement sensor 4, the second displacement sensor 5, and the third displacement sensor 6 will not be too large or too small, and the monitoring results will be more accurate and reliable. The electronic prompter can be used to closely monitor the bridge posture and control risks.

[0033] During the operation, each span of the bridge on one side of the expansion joint will be lifted as a whole. Figure 3 One side of the bridge expansion joint is a lifting beam A, and the other side is a reference beam B. The lifting beam A is provided with a first metal bracket A1 opposite to the bridge expansion joint, and the reference beam B is provided with a second metal bracket B1 opposite to the bridge expansion joint. In order to improve the detection and installation efficiency, in this embodiment, the first mounting seat 1 is magnetically connected to the first metal bracket A1 through a first magnetic connection member 13, and the second mounting seat 2 is magnetically connected to the second metal bracket B1 through a second magnetic connection member 23.

[0034] Specifically, the first mounting seat 1 includes a first seat body 11 and a first mounting plate 12, wherein the first mounting plate 12 is connected to the top surface of the first seat body 11; the first seat body 11 is provided with a first mounting groove, the first mounting groove is opposite to the bridge expansion joint and passes through the bottom surface of the first seat body 11, and the first magnetic connection member 13 is fixedly arranged in the first mounting groove. The second mounting seat 2 includes a second seat body 21 and a second mounting plate 22, wherein the second mounting plate 22 is connected to the top surface of the second seat body 21; the second seat body 21 is provided with a second mounting groove, the second mounting groove is opposite to the bridge expansion joint and passes through the bottom surface of the second seat body 21, and the second magnetic connection member 23 is fixedly arranged in the second mounting groove.

[0035] When installing the first mounting seat 1, the first mounting seat 1 can be directly placed on the top of the first metal bracket A1 by means of the magnetic attraction of the first magnetic connection member 13; when installing the second mounting seat 2, the second mounting seat 2 can be directly placed on the top of the second metal bracket B1 by means of the magnetic attraction of the second magnetic connection member 23, and the installation before detection is very convenient. At this time, the detected end of the searchlight 3 on the first mounting seat 1 extends directly above the expansion joint of the bridge.

[0036] The first level detection device 14 and the second level detection device 24 are both existing level detectors. The first level detection device 14 is fixed on the top surface of the first base body 11, and the second level detection device 24 is fixed on the top surface of the second base body 21. The first level adjustment member 15 is a first level adjustment screw arranged around the first base body 11. By adjusting the first level adjustment screw, the top surface of the first base body 11 can be kept horizontal. The second level adjustment member 25 is a second level adjustment screw arranged around the second base body 21. By adjusting the second level adjustment screw, the top surface of the second base body 21 can be kept horizontal. The electronic prompter can be at least one of a buzzer alarm and an alarm light. The electronic prompter, the first displacement sensor 4, the second displacement sensor 5, and the third displacement sensor 6 are all connected to the PLC controller. When at least one of the first displacement sensor 4, the second displacement sensor 5, and the third displacement sensor 6 detects that the displacement of the bridge expansion joint exceeds a preset safety value, the PLC controller promptly controls the electronic prompter to give an early warning. The first displacement sensor 4, the second displacement sensor 5, and the third displacement sensor 6 can use laser ranging sensors, infrared ranging sensors and non-contact ranging sensors. In this embodiment, contact ranging sensors are preferably used, such as thimble-type ranging sensors, which have stronger resistance to environmental interference (such as water mist, dust, etc.).

[0037] The first mounting seat 1 of this embodiment includes a first seat body 11 and a first mounting plate 12. The first mounting plate 12 is movably connected to the first seat body 11. The first horizontal detection device 14 and the first horizontal adjustment member 15 are both arranged on the first seat body 11. The searchlight 3 is arranged on the first mounting plate 12. The first mounting plate 12 is an L-shaped plate, and is provided with a first transverse extension portion extending transversely and a first vertical extension portion extending vertically. The first transverse extension portion is perpendicular to the first vertical extension portion, the first transverse extension portion is connected to the first seat body 11, and the searchlight 3 is connected to the first vertical extension portion. The first transverse extension portion is provided with a first strip hole 121 extending longitudinally. The first strip hole 121 is provided with a first locking member 122 for fixing the first mounting plate 12 to the first seat body 11. The first locking member 122 can move along the extension direction of the first strip hole 121.

[0038] In this embodiment, the end face of the detected end, the side face of the detected end, and the bottom face of the detected end on the search plate 3 are all planes, and the end face of the detected end, the side face of the detected end, and the bottom face of the detected end are all arranged vertically in pairs. Among them, the search plate 3 can be arranged to be formed into one body with the first mounting plate 12, and the search plate 3 can also be connected to the first mounting plate 12. In this embodiment, the first vertical extension portion is provided with a through hole (not shown) adapted to the search plate 3 and extending horizontally, and the search plate 3 is inserted in the through hole, and the first vertical extension portion is provided with a fifth locking member 123 for abutting against the top surface of the search plate 3.

[0039] The second mounting seat 2 of this embodiment includes a second seat body 21 and a second mounting plate 22, the second mounting plate 22 is movably connected to the second seat body 21, the second level detection device 24 and the second level adjustment member 25 are both arranged on the second seat body 21, and the first displacement sensor 4, the second displacement sensor 5, and the third displacement sensor 6 are all arranged on the second mounting plate 22. The second transverse extension portion or the second seat body 21 is provided with a second strip hole 221 extending longitudinally, and a second locking member 222 for fixing the second mounting plate 22 and the second seat body 21 is arranged in the second strip hole 221, and the second locking member 222 can move along the extension direction of the second strip hole 221.

[0040] The second mounting plate 22 is an L-shaped plate, provided with a second lateral extension portion extending transversely and a second vertical extension portion extending vertically, the second lateral extension portion is perpendicular to the second vertical extension portion, the second lateral extension portion is connected to the second seat body 21, the second vertical extension portion is provided with a third mounting plate 26 and a fourth mounting plate 27 connected thereto, the fourth mounting plate 27 is arranged below the third mounting plate 26, and the third displacement sensor 6 is connected to the fourth mounting plate 27. For the specific mounting structure of the first displacement sensor 4 and the second displacement sensor 5, the first displacement sensor 4 can be arranged to be connected to the third mounting plate 26, the second displacement sensor 5 can be connected to the second vertical extension portion, or the first displacement sensor 4 and the second displacement sensor 5 can be connected to the third mounting plate 26.

[0041] When the first displacement sensor 4 and the second displacement sensor 5 are both connected to the third mounting plate 26, the third mounting plate 26 is an L-shaped plate, including a third lateral extension portion extending laterally and a longitudinal extension portion extending longitudinally, the third lateral extension portion is perpendicular to the longitudinal extension portion, the first displacement sensor 4 is arranged on the third lateral extension portion, and the second displacement sensor 5 is arranged on the longitudinal extension portion.

[0042] When the first displacement sensor 4 is connected to the third mounting plate 26, the second displacement sensor 5 is connected to the second vertical extension portion, and the third mounting plate 26 is provided with a third strip hole 261 extending laterally, and a third locking piece 262 for fixing the third mounting plate 26 and the second vertical extension portion is provided in the third strip hole 261, and the third locking piece 262 can move along the extension direction of the third strip hole 261.

[0043] In this embodiment, the fourth mounting plate 27 is arranged below the third mounting plate 26, and the third displacement sensor 6 is directly opposite to the bottom surface of the detected end. The fourth mounting plate 27 is an L-shaped plate, including a fourth lateral extension portion extending horizontally and a third vertical extension portion extending vertically, the fourth lateral extension portion is perpendicular to the third vertical extension portion, the third displacement sensor 6 is arranged on the fourth lateral extension portion, the third vertical extension portion is provided with a fourth strip hole 271 extending vertically, the fourth strip hole 271 is provided with a fourth locking member 272 for fixing the fourth mounting plate 27 and the second vertical extension portion, and the fourth locking member 272 can move along the extension direction of the fourth strip hole 271.

[0044] Since the present embodiment provides a first strip hole 121 extending longitudinally and a first locking piece 122 capable of moving along the extension direction of the first strip hole 121 on the first mounting plate 12, and provides a second strip hole 221 extending longitudinally and a second locking piece 222 capable of moving along the extension direction of the second strip hole 221 on the second mounting plate 22, by adjusting the position of the first locking piece 122 in the first strip hole 121, or adjusting the position of the second locking piece 222 in the second strip hole 221, the relative position adjustment of the searchlight 3 and each displacement sensor in the longitudinal direction is achieved.

[0045] Since the third mounting plate 26 is provided with a third strip hole 261 extending transversely and a third locking piece 262 capable of moving along the extension direction of the third strip hole 261 in this embodiment, the relative position adjustment of the searchlight 3 and the first displacement sensor 4 in the transverse direction is achieved by adjusting the position of the third locking piece 262 in the third strip hole 261.

[0046] Since the fourth mounting plate 27 is provided with a fourth strip hole 271 extending vertically and a fourth locking piece 272 capable of moving along the extension direction of the fourth strip hole 271 in this embodiment, the vertical relative position adjustment of the searchlight 3 and the third displacement sensor 6 is achieved by adjusting the position of the fourth locking piece 272 in the fourth strip hole 271.

[0047] At the same time, the searchlight plate 3 can move laterally along the through hole extending laterally, and is locked by abutting against the top surface of the searchlight plate 3 through the fifth locking piece 123. By adjusting the relative position of the searchlight plate 3 and the through hole, the relative position of the searchlight plate 3 and each displacement sensor in the lateral direction is adjusted.

[0048] Before monitoring, when the first mounting seat 1 is magnetically connected to the first metal bracket A1 through the magnetic connector, and the second mounting seat 2 is magnetically connected to the second metal bracket B1 through the second magnetic connector 23, the first seat body 11 and the second seat body 21 can be adjusted to a level with the help of the first level detection device 14, the second level detection device 24, the first level adjustment member 15, and the second level adjustment member 25. Each displacement sensor adopts a pin-type distance measuring sensor, and all are directly aligned with the detected end, which can not only enhance the monitoring device's ability to resist external environmental interference, but also facilitate monitoring under different working conditions, and the monitoring results are accurate and reliable.

[0049] By adjusting the first mounting plate 12, the second mounting plate 22, the third mounting plate 26, the fourth mounting plate 27, and the search plate 3, the relative position of the search plate 3 and each displacement sensor can be fine-tuned to adapt to monitoring of different size ranges.

[0050] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A bridge span structure posture monitoring device, characterized in that: It comprises a first mounting seat, a second mounting seat and an electronic prompter, wherein the first mounting seat and the second mounting seat are respectively arranged on opposite sides of the expansion joint of the bridge; The first mounting seat is provided with a searchlight, a first level detection device for detecting the levelness of the first mounting seat, and a first level adjustment member for adjusting the levelness of the first mounting seat; The second mounting seat is provided with a first displacement sensor, a second displacement sensor, a third displacement sensor, a second level detection device for detecting the levelness of the second mounting seat, and a second level adjustment member for adjusting the levelness of the second mounting seat; the searchlight is provided with a detected end; the first displacement sensor is arranged opposite to the side surface of the detected end; the second displacement sensor is arranged opposite to the end surface of the detected end; and the third displacement sensor is arranged opposite to the top surface or the bottom surface of the detected end; The electronic prompter is electrically connected to the first displacement sensor, the second displacement sensor and the third displacement sensor.

2. The bridge span structure posture monitoring device according to claim 1, characterized in that: The first displacement sensor, the second displacement sensor, and the third displacement sensor are all contact distance measurement sensors.

3. The bridge span structure posture monitoring device according to claim 1 or 2, characterized in that: The first mounting seat comprises a first seat body and a first mounting plate, the first mounting plate is movably connected to the first seat body, the first level detection device and the first level adjustment member are both arranged on the first seat body, and the searchlight is arranged on the first mounting plate; The second mounting seat includes a second seat body and a second mounting plate, the second mounting plate is movably connected to the second seat body, the second level detection device and the second level adjustment member are both arranged on the second seat body, and the first displacement sensor, the second displacement sensor, and the third displacement sensor are all arranged on the second mounting plate.

4. The bridge span structure posture monitoring device according to claim 3, characterized in that: The first mounting plate is provided with a first transverse extension portion extending transversely and a first vertical extension portion extending vertically, the first transverse extension portion is perpendicular to the first vertical extension portion, the first transverse extension portion is connected to the first seat body, and the searchlight is connected to the first vertical extension portion; The second mounting plate is provided with a second lateral extension portion extending laterally and a second vertical extension portion extending vertically, the second lateral extension portion is perpendicular to the second vertical extension portion, the second lateral extension portion is connected to the second seat body, the second vertical extension portion is provided with a third mounting plate and a fourth mounting plate connected thereto, the third displacement sensor is connected to the fourth mounting plate, the first displacement sensor is connected to the third mounting plate, and the second displacement sensor is connected to the second vertical extension portion, or The first displacement sensor and the second displacement sensor are both connected to the third mounting plate.

5. The bridge span structure posture monitoring device according to claim 4, characterized in that: The first transversely extending portion or the first seat body is provided with a first strip-shaped hole extending longitudinally, a first locking member for fixing the first mounting plate to the first seat body is provided in the first strip-shaped hole, and the first locking member can move along the extending direction of the first strip-shaped hole; The second transverse extension portion or the second seat body is provided with a second strip hole extending longitudinally, and a second locking piece for fixing the second mounting plate and the second seat body is provided in the second strip hole, and the second locking piece can move along the extension direction of the second strip hole.

6. The bridge span structure posture monitoring device according to claim 4, characterized in that: The first vertical extension portion is provided with a through hole adapted to the searchboard and extending transversely, the searchboard is inserted into the through hole, and the first vertical extension portion is provided with a fifth locking piece for abutting against the top surface of the searchboard.

7. The bridge span structure posture monitoring device according to claim 4, characterized in that: When the first displacement sensor and the second displacement sensor are both connected to the third mounting plate, the third mounting plate comprises a third lateral extension portion extending transversely and a longitudinal extension portion extending longitudinally, the third lateral extension portion is perpendicular to the longitudinal extension portion, the first displacement sensor is arranged on the third lateral extension portion, and the second displacement sensor is arranged on the longitudinal extension portion; When the first displacement sensor is connected to the third mounting plate, the second displacement sensor is connected to the second vertical extension portion, the third mounting plate is provided with a third strip hole extending laterally, and a third locking piece for fixing the third mounting plate and the second vertical extension portion is provided in the third strip hole, and the third locking piece can move along the extension direction of the third strip hole.

8. The bridge span structure posture monitoring device according to claim 4, characterized in that: The fourth mounting plate includes a fourth lateral extension portion extending laterally and a third vertical extension portion extending vertically, the fourth lateral extension portion is perpendicular to the third vertical extension portion, the third displacement sensor is arranged on the fourth lateral extension portion, the third vertical extension portion is provided with a fourth strip hole extending vertically, the fourth strip hole is provided with a fourth locking piece for fixing the fourth mounting plate to the second vertical extension portion, and the fourth locking piece can move along the extension direction of the fourth strip hole.

9. The bridge span structure posture monitoring device according to claim 3, characterized in that: One side of the bridge expansion joint is a lifting beam, and the other side is a reference beam. The lifting beam is provided with a first metal bracket opposite to the bridge expansion joint, and the reference beam is provided with a second metal bracket opposite to the bridge expansion joint. The first mounting seat is magnetically connected to the first metal bracket through a first magnetic connector, and the second mounting seat is magnetically connected to the second metal bracket through a second magnetic connector.

10. The bridge span structure posture monitoring device according to claim 9, characterized in that: The first base body is provided with a first mounting groove, the first mounting groove passes through the bottom surface of the first base body, and the first magnetic connection member is arranged in the first mounting groove; The second base body is provided with a second mounting groove, the second mounting groove passes through the bottom surface of the second base body, and the second magnetic connection member is arranged in the second mounting groove; The first mounting seat is arranged on the top of the first metal bracket, the second mounting seat is arranged on the top of the second metal bracket, and the detected end of the searchlight is arranged directly above the expansion joint of the bridge.

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