Laser microwave non-contact bridge deflection detection device and detection method

Abstract

The invention relates to a laser microwave non-contact type bridge deflection detection device and method, and relates to the technical field of bridge deflection detection.The laser microwave non-contact type bridge deflection detection device comprises two hinged storage box bodies, and bearing tables are arranged in the storage box bodies; a laser transmitting and receiving module and a microwave radar module are fixed on the bearing table; an equipment host and a power supply module are fixed in the storage box body, and the laser transmitting and receiving module and the microwave radar module are electrically connected with the equipment host; when the two storage box bodies are opened, the opened state can be locked; the device further comprises a reflection device and a leveling mechanism. The reflection device is arranged at the bottom of the detected beam. The leveling mechanism is arranged between the bearing table and the storage box body and used for supporting the bearing table and adjusting the bearing table to be in a horizontal state. The method has the effect of improving the bridge deflection detection efficiency and convenience.

Description

Technical Field

[0001] This application relates to the field of bridge deflection detection technology, and in particular to a laser-microwave non-contact bridge deflection detection device and detection method. Background Technology

[0002] In recent years, bridge construction has occupied a vital position in the transportation sector, and its safety performance directly affects people's lives and property safety and the normal operation of society. Bridge deflection, as one of the key indicators for measuring the health of a bridge structure, is of paramount importance for the timely detection of potential bridge defects, assessment of bridge load-bearing capacity, and ensuring safe bridge operation. High-performance bridge deflection detection technology can help engineers promptly grasp the working status of bridges, providing a scientific basis for bridge maintenance, reinforcement, and renovation, thereby extending the service life of bridges and reducing safety accidents caused by bridge defects.

[0003] In the past, the industry mainly used traditional methods such as manual measurement, precision leveling, total station measurement, communicating vessel measurement, and inclinometer method to measure bridge deflection in bridge load tests. Traditional manual measurement relies on manual operation and visual observation, requiring staff to conduct on-site measurements on the bridge. Precision leveling calculates deflection by measuring the height difference between two points. Total station measurement utilizes the high-precision measurement capabilities of a total station to obtain the three-dimensional coordinates of the target point to determine deflection. Communicating vessel measurement measures changes in liquid level based on the principle of communicating vessels to reflect bridge deflection. Inclinometer method calculates deflection by measuring the tilt angle of bridge components.

[0004] However, all existing bridge deflection testing methods described above present significant operational difficulties, often requiring substantial human and material resources, and also suffer from limitations in testing accuracy. The total station method, in particular, can only measure one target point at a time, necessitating frequent switching when performing multi-point measurements, resulting in a relatively low sampling frequency and failing to meet the demands for efficient and accurate measurements. Summary of the Invention

[0005] To improve the efficiency and convenience of bridge deflection detection, this application provides a laser-microwave non-contact bridge deflection detection device and detection method.

[0006] Firstly, the laser-microwave non-contact bridge deflection detection device and method provided in this application adopt the following technical solution: The laser-microwave non-contact bridge deflection detection device includes two hinged storage boxes. Each storage box contains a support platform, on which a laser transmitting and receiving module and a microwave radar module are fixed. A main unit and a power supply module are also fixed within each storage box. Both the laser transmitting and receiving module and the microwave radar module are electrically connected to the main unit. When both storage boxes are opened, the opened state can be locked. It also includes a reflective device and a leveling mechanism. The reflective device is installed at the bottom of the beam being inspected. The leveling mechanism is located between the support platform and the storage box, and is used to support the support platform and adjust the support platform to a horizontal state.

[0007] By adopting the above technical solution, the bridge deflection detection device operates by first evenly distributing reflective devices at the bottom of the beam under inspection. Then, multiple bridge deflection detection devices are placed one by one below the reflective devices, and the devices are wirelessly connected in series. Next, the two hinged storage boxes in each device are opened and locked in the open state. The leveling mechanism supports the bearing platform and adjusts it to a horizontal position to ensure detection accuracy. The main unit controls the laser transmitting and receiving module to emit a laser beam, which is directed towards the reflective devices at the bottom of the beam under inspection. The reflective devices reflect the laser beam back to the laser transmitting and receiving module, which converts the received optical signal into an electrical signal and transmits it to the main unit. Simultaneously, the microwave radar module emits a microwave signal. The microwaves are reflected back from the bridge under inspection and received by the microwave receiving antenna, which converts the received microwave signal into an electrical signal and transmits it to the main unit. The main unit calculates the bridge deformation based on the time difference between laser emission and reception, as well as the microwave signal reflection. When the detection distance is long or atmospheric conditions are significant, such as heavy fog, the microwave radar module can assist the laser transmitting and receiving module in detection, avoiding the limitations of single laser detection and improving detection accuracy. Furthermore, the device can wirelessly connect multiple devices to meet the needs of multi-point testing, greatly improving on-site testing efficiency, reducing operational difficulty, saving manpower and testing time, and also improving the accuracy of testing data.

[0008] Optionally, the leveling mechanism includes three support rods, two of which are hinged at one end to the inside of one of the storage boxes, and the other support rod is hinged to the inside of the other storage box; an electric telescopic rod is hinged to the side of the support rod away from the storage box, and the electric telescopic rod is connected to the support platform through a ball joint structure.

[0009] By adopting the above technical solution, if the support platform is not in a horizontal state, it can be extended and adjusted by means of an electric telescopic rod. Since it is hinged to the support rod and connected to the support platform through a ball joint structure, it can flexibly change the angle and length, thereby adjusting the tilt angle of the support platform to ensure that the support platform is in a horizontal state, thus improving the detection accuracy.

[0010] Optionally, the leveling mechanism further includes a level detection module and a control module. The level detection module includes a gyroscope mounted on the support platform. The signal output terminal of the gyroscope is electrically connected to the control module, and the control module is electrically connected to the three electric telescopic rods.

[0011] By adopting the above technical solution, the gyroscope in the leveling mechanism is installed on the support platform, which can detect the horizontal state of the support platform in real time and transmit the detected horizontal signal to the control module. When the support platform is not in a horizontal state, the control module will send control commands to the three electric telescopic rods according to the received signals. The electric telescopic rods are connected to the support platform through a ball joint structure, thereby adjusting the support platform to a horizontal state. This leveling mechanism can automatically adapt to different placement environments, ensure that the support platform remains horizontal, reduce the difficulty and time of manual adjustment, and improve detection efficiency.

[0012] Optionally, the leveling mechanism further includes three pull rods, each corresponding to one of the three support rods. Each support rod has a groove along its length. One end of each pull rod is hinged to the inside of the storage box, and the other end is fixed with a slide rod that slides within the groove.

[0013] By adopting the above technical solution, when the storage box is folded, the pull rod hinged to the inside of the storage box will rotate with the storage action. The slide rod fixed at the other end of the pull rod slides in the slide groove of the support rod, thereby pulling the support rod to rotate towards the side closer to the storage box. This automatically folds the hinge between the support rod and the electric telescopic rod, making the leveling mechanism more convenient to store. It eliminates the need for complicated operations such as manually pressing the hinge between the support rod and the electric telescopic rod, improving the storage efficiency of the leveling mechanism and making it convenient to carry and transport the entire bridge deflection detection device.

[0014] Optionally, the support platform includes two hinged adjustment plates, one of which is fixed with a first spring pin, and the other of which is fixed with a first retaining ring that engages with the first spring pin.

[0015] By adopting the above technical solution, the two adjustment plates of the bearing platform are hinged to each other. When the two storage boxes are opened, the two adjustment plates are in a horizontal state. At this time, the first spring pin is pressed, so that the pin shaft of the first spring pin is inserted into the first retaining ring that cooperates with it, thereby connecting the two adjustment plates into a whole. This keeps the laser transmitting and receiving module and microwave radar module fixed on the bearing platform stable, which is conducive to accurately detecting the bridge deflection.

[0016] Optionally, the storage box has legs on its outer side and a storage groove on its outer side, and the legs can be stored in the storage groove.

[0017] By adopting the above technical solution, the support legs can support the storage box, which is convenient for supporting and using the storage box, thus facilitating the testing work. After the testing device is used, the support legs can be stored in the storage slot, reducing the space occupied by the device and making it convenient to carry and store.

[0018] Optionally, the support leg is hinged to the storage box via a hinge shaft. A coil spring is sleeved on the outside of the hinge shaft. The two ends of the coil spring are fixed to the support leg and the storage box respectively, and the coil spring always provides a torsional force to the support leg to flip away from the storage box.

[0019] By adopting the above technical solution, when the device is in use, the coil spring will always provide a torsional force to rotate the legs away from the storage box, making the leg unfolding process more convenient and efficient, and enabling the device to be set up and prepared quickly. Moreover, the stable torsional force provided by the coil spring can ensure that the position of the legs is relatively fixed after unfolding, making the legs less likely to bend inward under force, providing stable support for the device, and improving the stability and accuracy of the detection.

[0020] Optionally, the outer side of the storage box is provided with a plug-in slot and a locking cavity from the outside to the inside. A rotating shaft is rotatably connected to the support leg. A locking rod is fixed at the end of the rotating shaft. The locking rod can be inserted into the plug-in slot and rotated into the locking cavity.

[0021] By adopting the above technical solution, after the outrigger is stored in the storage slot, the locking rod can be inserted through the insertion slot and into the locking cavity. At the same time, the rotating shaft is rotated, and the rotating shaft drives the locking rod to rotate in the locking cavity, so that the locking rod and the insertion slot are offset at a certain angle and locked into the locking cavity. This completes the storage and fixation of the outrigger. After the locking rod enters the locking cavity, it is not easy to shake under the action of the torsion spring, so that the detection device is not easily affected by vibration during the carrying process, and the fixed state of the outrigger is unlocked, causing it to fall out.

[0022] Optionally, the reflecting device includes a reflector and a focusing lens. The reflector has a concave reflective structure on its surface, and the focusing lens is mounted on the front end of the reflector and aligned with the optical path of the laser emitting and receiving module. The device host includes a processor and a storage module. The processor is electrically connected to the laser emission and reception module and the microwave radar module. The storage module is used to store detection data and processing programs.

[0023] By adopting the above technical solution, during the detection process, the laser emitted by the laser emission and reception module illuminates the focusing lens, which focuses the laser onto the concave reflective structure of the reflector. The concave reflective structure further concentrates the reflected laser, which is then reflected back to the laser emission and reception module. The laser emission and reception module and the microwave radar module convert the received signals into electrical signals and transmit them to the processor of the host device. The processor calculates the bridge deflection data according to a preset algorithm. The storage module stores the detection data and processing program for easy viewing and analysis of the detection data later.

[0024] Secondly, this application provides a detection method applicable to a laser-microwave non-contact bridge deflection detection device, suitable for the aforementioned laser-microwave non-contact bridge deflection detection device, comprising the following steps: S1. Distribute reflective devices evenly at the bottom of the beam being inspected; S2. Place multiple bridge deflection detection devices one by one under the reflector and connect them wirelessly in series. S3. Open and lock the two hinged storage boxes in each bridge deflection detection device to the open state; S4. The leveling mechanism supports the bearing platform and adjusts it to a horizontal state; S5. The host device controls the laser transmitting and receiving module to emit a laser. The laser is directed towards the reflecting device, which reflects the laser back to the laser transmitting and receiving module. The laser receiving module converts the received optical signal into an electrical signal and transmits it to the host device. At the same time, the microwave radar module emits a microwave signal. The microwave is reflected back from the bridge under test and received by the microwave receiving antenna. The microwave receiving antenna converts the received microwave signal into an electrical signal and transmits it to the host device. S6. The main unit of the equipment calculates the deformation of the bridge based on the time difference data of the emitted and received lasers and the reflection of the microwave signal. When the detection distance is far or the atmospheric influence is large, such as in foggy weather, the microwave radar module can assist the laser emission and reception module in detection.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. When the detection distance is long or the atmospheric influence is significant, such as in foggy weather, the microwave radar module can assist the laser transmitter and receiver module in detection, avoiding the limitations of single laser detection and improving detection accuracy. Furthermore, the device can wirelessly connect multiple devices to meet the needs of multi-point detection, greatly improving on-site detection efficiency, reducing operational difficulty, saving manpower and detection time, and also improving the accuracy of detection data. 2. When the support platform is not in a horizontal state, the control module will send control commands to the three electric telescopic rods according to the received signals. The electric telescopic rods are connected to the support platform through a ball joint structure, thereby adjusting the support platform to a horizontal state. This leveling mechanism can automatically adapt to different placement environments, ensure that the support platform remains horizontal, reduce the difficulty and time of manual adjustment, and improve detection efficiency. 3. When the storage box is folded, the pull rod pulls the support rod to rotate towards the side closer to the storage box, automatically folding the hinge between the support rod and the electric telescopic rod. This makes the leveling mechanism easier to store, eliminating the need for complicated operations such as manually pressing the hinge between the support rod and the electric telescopic rod, improving the efficiency of the leveling mechanism's storage, and making it convenient to carry and transport the entire bridge deflection detection device. 4. When the device is in use, the coil spring will always provide a torsional force to rotate the legs away from the storage box, making the deployment of the legs more convenient and efficient, and enabling the device to be set up and prepared quickly. Moreover, the stable torsional force provided by the coil spring can ensure that the position of the legs is relatively fixed after deployment, making the legs less likely to bend inward under force, providing stable support for the device and improving the stability and accuracy of the detection. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the laser-microwave non-contact bridge deflection detection device in this application; Figure 2 This is a schematic diagram showing the structure of the laser-microwave non-contact bridge deflection detection device in its stowed state. Figure 3 This is a partial structural diagram of a laser-microwave non-contact bridge deflection detection device. Figure 4 This is a structural diagram illustrating the outrigger deployment process; Figure 5 This is a partial sectional view of the storage box.

[0027] Explanation of reference numerals in the attached drawings: 1. Storage box; 11. Second spring pin; 12. Second retaining ring; 13. Insertion slot; 14. Locking cavity; 2. Support platform; 21. Adjustment plate; 22. First spring pin; 23. First retaining ring; 3. Laser transmitting and receiving module; 4. Microwave radar module; 5. Main unit of the equipment; 6. Power supply module; 7. Leveling mechanism; 71. Support rod; 711. Slide groove; 72. Pull-back rod; 73. Electric telescopic rod; 74. Ball joint structure; 8. Support leg; 81. Hinge shaft; 82. Coil spring; 83. Rotation shaft; 84. Locking rod. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0029] This application discloses a laser-microwave non-contact bridge deflection detection device. (Refer to...) Figure 1 and Figure 2 The bridge deflection detection device includes two hinged storage boxes 1, a support platform 2 housed within the storage box 1, a laser emission and reception module 3 and a microwave radar module 4 fixed to the support platform 2, a main unit 5 electrically connected to the laser emission and reception module 3 and the microwave radar module 4, a power supply module 6, a leveling mechanism 7 for supporting and leveling the support platform 2, and a reflective device located at the bottom of the beam being inspected. The two storage boxes 1 are hinged together and can be locked when opened, making the device more stable during use. The main unit 5 and the power supply module 6 are fixed inside the storage box 1; the main unit 5 is used for data transmission and processing. The leveling mechanism 7 is located between the support platform 2 and the storage box 1.

[0030] When this bridge deflection detection device is in operation, reflective devices are first evenly distributed at the bottom of the beam under inspection. Then, multiple bridge deflection detection devices are placed one by one below the reflective devices, and the devices are wirelessly connected in series. Next, the two hinged storage boxes 1 in each bridge deflection detection device are opened and locked in the open state. The leveling mechanism 7 supports the bearing platform 2 and adjusts it to a horizontal state. The main unit 5 controls the laser transmitting and receiving module 3 to emit a laser. The laser is directed towards the reflective devices at the bottom of the beam under inspection, and the reflective devices reflect the laser back to the laser transmitting and receiving module 3. The laser receiving module converts the received optical signal into an electrical signal and transmits it to the main unit 5. Simultaneously, the microwave radar module 4 emits a microwave signal. The microwave is reflected back from the bridge under inspection and received by the microwave receiving antenna. The microwave receiving antenna converts the received microwave signal into an electrical signal and transmits it to the main unit 5. The main unit 5 calculates the bridge deformation based on data such as the time difference between laser emission and reception and the reflection of the microwave signal. When the detection distance is long or atmospheric conditions are significant, such as heavy fog, the microwave radar module 4 can assist the laser transmitting and receiving module 3 in detection, avoiding the limitations of single laser detection and improving detection accuracy. Furthermore, the device can wirelessly connect multiple devices to meet the needs of multi-point testing, greatly improving on-site testing efficiency.

[0031] Specifically, refer to Figure 1 and Figure 3 The support platform 2 includes two hinged adjustment plates 21. One adjustment plate 21 is fixed with a first spring pin 22, and the other adjustment plate 21 is fixed with a first retaining ring 23. When the two storage boxes 1 are opened, the two adjustment plates 21 are in a horizontal state. Pressing the first spring pin 22 causes the pin shaft to be inserted into the first retaining ring 23, and the two adjustment plates 21 form a whole, ensuring the stability of the laser transmitting and receiving module 3 and the microwave radar module 4.

[0032] One of the storage boxes 1 is fixed with a second spring pin 11, and the other storage box 1 is fixed with a second retaining ring 12. The pin of the second spring pin 11 can be inserted into the second retaining ring 12 to lock the two storage boxes 1 in the open state.

[0033] Specifically, the laser transmitter and receiver module 3 includes a laser transmitter and a laser receiver, which are electrically connected to the host device 5 via a line to transmit data to the host device 5. The microwave radar module 4 includes a microwave transmitting antenna and a microwave receiving antenna. The microwave transmitting antenna is a microstrip antenna used to transmit microwave signals, and the microwave receiving antenna is an array antenna. The microwave transmitting antenna and the microwave receiving antenna are also electrically connected to the host device 5 via a line.

[0034] The main unit 5 includes a processor and a storage module. The processor is an ARM series embedded processor, capable of quickly processing data transmitted from the laser transmitter / receiver module 3 and the microwave radar module 4. The storage module uses flash memory chips to store detection data and processing programs. The main unit 5 connects all modules together via a circuit board and is encapsulated in a casing for protection against external environmental damage. The power module 6 is powered by a lithium battery, providing electrical support for the entire device. The power module 6 is electrically connected to the main unit 5, the laser transmitter / receiver module 3, and the microwave radar module 4 via wiring.

[0035] The reflecting device includes a reflector and a focusing lens. The reflector surface has a concave reflective structure, which can concentrate the reflected laser and improve the reflection efficiency. The reflector is made of high-reflectivity aluminum. The focusing lens is mounted at the front end of the reflector and corresponds to the optical path of the laser transmitting and receiving module 3, ensuring that its optical axis coincides with the optical path of the laser transmitting and receiving module 3. When the laser emitted by the laser transmitting and receiving module 3 shines on the focusing lens, the focusing lens focuses the laser onto the concave reflective structure of the reflector, and then reflects it back to the laser transmitting and receiving module 3.

[0036] Specifically, refer to Figure 3 The leveling mechanism 7 includes three support rods 71, a level detection module, a control module, and a pull-back rod 72. Two of the support rods 71 ​​are hinged at one end to the inside of one of the storage boxes 1, and the other support rod 71 is hinged to the inside of the other storage box 1. An electric telescopic rod 73 is hinged to the side of the support rod 71 away from the storage box 1. The electric telescopic rod 73 is connected to the bottom of the support platform 2 through a ball joint structure 74. The ball joint structure 74 allows the electric telescopic rod 73 to rotate flexibly in all directions, ensuring support and adjustment of the support platform 2.

[0037] The level detection module includes a gyroscope mounted on the support platform 2. The gyroscope accurately measures the tilt angle of the support platform 2, and its signal output is electrically connected to the control module. The control module is electrically connected to the three electric telescopic rods 73. When the gyroscope detects that the support platform 2 is not level, it transmits a signal to the control module. The control module then sends control commands to the electric telescopic rods 73 based on the signal, controlling the electric telescopic rods 73 to extend or retract until the support platform 2 is level. Alternatively, a tilt sensor or similar device can be used instead of a gyroscope.

[0038] The pull-back rod 72 corresponds one-to-one with the support rod 71. The support rod 71 has a groove 711 along its length. One end of the pull-back rod 72 is hinged to the inside of the storage box 1, and the other end is fixed with a sliding rod that slides within the groove 711. When the storage box 1 is folded, the pull-back rod 72 hinged to the inside of the storage box 1 rotates with the folding action. The sliding rod fixed at the other end of the pull-back rod 72 slides within the groove 711 of the support rod 71, thereby pulling the support rod 71 to rotate closer to the storage box 1. This automatically folds the hinge between the support rod 71 and the electric telescopic rod 73, making the leveling mechanism 7 more convenient to fold during storage, eliminating the need for complex operations such as manually pressing the hinge between the support rod 71 and the electric telescopic rod 73.

[0039] Specifically, refer to Figure 2 , Figure 4 and Figure 5 The storage box 1 has a support leg 8 on its outer side. One end of the support leg 8 is fixed to a hinge shaft 81. The support leg 8 is hinged to the storage box 1 through the hinge shaft 81. A coil spring 82 is provided between the support leg 8 and the storage box 1. One end of the coil spring 82 is fixed to the support leg 8, and the other end is fixed to the storage box 1. The coil spring 82 is sleeved on the outside of the hinge shaft 81 and always provides a torsional force to rotate the support leg 8 away from the storage box 1. The outer side of the storage box 1 has a insertion groove 13 and a locking cavity 14 respectively from the outside to the inside. A rotating shaft 83 is rotatably connected to the support leg 8. A locking rod 84 is fixed to the side of the rotating shaft 83 near the storage box 1. When the outrigger 8 needs to be stored, the locking rod 84 can be inserted through the insertion slot 13 and into the locking cavity 14. At the same time, the rotating shaft 83 is rotated, and the rotating shaft 83 drives the locking rod 84 to rotate in the locking cavity 14, so that the locking rod 84 and the insertion slot 13 are offset at a certain angle and locked into the locking cavity 14, thus completing the storage and fixing of the outrigger 8.

[0040] This application also discloses a laser-microwave non-contact method for detecting bridge deflection, comprising the following steps: S1. Distribute reflective devices evenly at the bottom of the beam being inspected. When distributing the reflective devices, ensure that they are securely installed and that the optical axis of the focusing lens coincides with the optical path of the laser emission and reception module 3.

[0041] S2. Place multiple bridge deflection detection devices one by one under the reflector and connect them wirelessly in series. Ensure the devices are stable during placement. Use Bluetooth or other wireless communication modules for wireless connection to ensure stable data transmission between the devices. Connecting multiple devices in series enables multi-point detection, improving detection efficiency.

[0042] S3. Open and lock the two hinged storage boxes 1 in each bridge deflection detection device to the open state. Press the second spring pin 11 to insert the pin into the second retaining ring 12 to complete the locking and ensure the stability of the device during the detection process.

[0043] S4. The leveling mechanism 7 supports the support platform 2 and adjusts it to a horizontal state. The horizontal detection module detects the horizontal state of the support platform 2 and transmits the signal to the control module. The control module controls the electric telescopic rod 73 to extend and retract until the support platform 2 is in a horizontal state.

[0044] S5. The host device 5 controls the laser transmitting and receiving module 3 to emit a laser. The laser beam is directed towards a reflecting device, which reflects the laser back to the laser transmitting and receiving module 3. The laser receiving module converts the received optical signal into an electrical signal and transmits it to the host device 5. Simultaneously, the microwave radar module 4 emits a microwave signal. The microwave is reflected back from the bridge under test and received by the microwave receiving antenna. The microwave receiving antenna converts the received microwave signal into an electrical signal and transmits it to the host device 5. By combining laser and microwave radar detection, the limitations of single laser detection are avoided.

[0045] S6. The main unit 5 calculates the deformation of the bridge based on the time difference data of the emitted and received lasers and the reflection of the microwave signal. When the detection distance is far or the atmospheric influence is large, such as in foggy weather, the microwave radar module 4 can assist the laser emission and reception module 3 in detection, thereby improving the accuracy and quality of detection.

[0046] The implementation principle of the laser-microwave non-contact bridge deflection detection device and method described in this application is as follows: This bridge deflection detection device combines laser and microwave radar for bridge deflection detection, avoiding the limitations of single laser detection and improving detection accuracy and quality. The leveling mechanism 7 can automatically adjust the bearing platform 2 to a horizontal state, ensuring the accuracy of the detection. Multiple devices are wirelessly connected in series, enabling multi-point detection without switching positions, greatly improving on-site detection efficiency. Simultaneously, the device adopts a retractable structural design, facilitating portability and transportation, and is suitable for bridge detection in various environments and terrains. Compared with traditional detection methods, it reduces operational difficulty, saves labor and detection time, and improves the accuracy of detection data.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laser-microwave non-contact bridge deflection detection device, characterized in that, The device includes two hinged storage boxes (1), each containing a support platform (2). A laser emission and reception module (3) and a microwave radar module (4) are fixed on the support platform (2). A device host (5) and a power module (6) are fixed inside each storage box (1). Both the laser emission and reception module (3) and the microwave radar module (4) are electrically connected to the device host (5). When the two storage boxes (1) are opened, the opened state can be locked. It also includes a reflective device and a leveling mechanism (7). The reflective device is installed at the bottom of the beam being inspected. The leveling mechanism (7) is located between the support platform (2) and the storage box (1) to support the support platform (2) and adjust the support platform (2) to a horizontal state.

2. The laser-microwave non-contact bridge deflection detection device according to claim 1, characterized in that, The leveling mechanism (7) includes three support rods (71), two of which are hinged at one end to the inside of one of the storage boxes (1) and the other support rod (71) is hinged to the inside of the other storage box (1); an electric telescopic rod (73) is hinged to the side of the support rod (71) away from the storage box (1), and the electric telescopic rod (73) is connected to the support platform (2) through a ball joint structure (74).

3. The laser-microwave non-contact bridge deflection detection device according to claim 2, characterized in that, The leveling mechanism (7) further includes a level detection module and a control module. The level detection module includes a gyroscope installed on the support platform (2). The signal output terminal of the gyroscope is electrically connected to the control module. The control module is electrically connected to the three electric telescopic rods (73).

4. The laser-microwave non-contact bridge deflection detection device according to claim 2, characterized in that, The leveling mechanism (7) also includes three pull rods (72), which correspond one-to-one with the three support rods (71). The support rods (71) have a groove (711) along their length. One end of the pull rod (72) is hinged to the inside of the storage box (1), and the other end is fixed with a slide rod that slides in the groove (711).

5. The laser-microwave non-contact bridge deflection detection device according to claim 2, characterized in that, The support platform (2) includes two hinged adjustment plates (21), one of which is fixed with a first spring pin (22), and the other is fixed with a first retaining ring (23) that cooperates with the first spring pin (22).

6. The laser-microwave non-contact bridge deflection detection device according to claim 1, characterized in that, The storage box (1) has a support leg (8) on its outer side and a storage slot on its outer side, and the support leg (8) can be stored in the storage slot.

7. The laser-microwave non-contact bridge deflection detection device according to claim 6, characterized in that, The support leg (8) is hinged to the storage box (1) via a hinge shaft (81). A coil spring (82) is sleeved on the outside of the hinge shaft (81). The two ends of the coil spring (82) are fixed to the support leg (8) and the storage box (1) respectively. The coil spring (82) always provides the support leg (8) with a torsional force to rotate away from the storage box (1).

8. The laser-microwave non-contact bridge deflection detection device according to claim 7, characterized in that, The storage box (1) has a plug-in slot (13) and a locking cavity (14) respectively opened from the outside to the inside. The support leg (8) is rotatably connected to a rotating shaft (83). A locking rod (84) is fixed at the end of the rotating shaft (83). The locking rod (84) can be inserted into the plug-in slot (13) and rotated into the locking cavity (14).

9. The laser-microwave non-contact bridge deflection detection device according to claim 1, characterized in that, The reflecting device includes a reflecting plate and a focusing lens. The surface of the reflecting plate is provided with a concave reflecting structure. The focusing lens is installed at the front end of the reflecting plate and aligned with the optical path of the laser emitting and receiving module (3). The host device (5) includes a processor and a storage module. The processor is electrically connected to the laser emission and reception module (3) and the microwave radar module (4). The storage module is used to store detection data and processing programs.

10. A detection method applicable to a laser-microwave non-contact bridge deflection detection device, characterized in that, A laser-microwave non-contact bridge deflection detection device applicable to any one of claims 1-9 comprises the following steps: S1. Distribute reflective devices evenly at the bottom of the beam being inspected; S2. Place multiple bridge deflection detection devices one by one under the reflector and connect them wirelessly in series. S3. Open the two hinged storage boxes (1) in each bridge deflection detection device and lock them in the open state; S4. The leveling mechanism (7) supports the bearing platform (2) and adjusts it to a horizontal state; S5. The host device (5) controls the laser transmitting and receiving module (3) to emit a laser. The laser is directed towards the reflecting device, which reflects the laser back to the laser transmitting and receiving module (3). The laser receiving module converts the received optical signal into an electrical signal and transmits it to the host device (5). At the same time, the microwave radar module (4) emits a microwave signal. The microwave is reflected back from the bridge under test and received by the microwave receiving antenna. The microwave receiving antenna converts the received microwave signal into an electrical signal and transmits it to the host device (5). S6. The main unit (5) calculates the deformation of the bridge based on the time difference data of the emitted and received lasers and the reflection of the microwave signal. When the detection distance is far or the atmospheric influence is large, such as in foggy weather, the microwave radar module (4) can assist the laser emission and reception module (3) in detection.

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