Multi-point driving bridge detection device and use method thereof

Abstract

The invention belongs to the technical field of bridge detection, and relates to a multi-point driving bridge detection device and a use method thereof. The rack is used for being matched with a driving part, and rotary motion is converted into linear motion of the trolley. When the rack reaches the position of the gear, the rack and the gear can be meshed and extruded, the elastic reset unit enables the inner shell to move in the height direction when the inner shell is subjected to external force, so that the first conductive contactor is in contact with the second conductive contactor to achieve circuit connection, and after the rack is separated from the gear, the inner shell is separated from the gear. The elastic reset unit resets after the external force disappears, and the circuit is disconnected. The rotary connecting part enables the telescopic operation table to rotate, and the angle of the telescopic operation table can be adjusted under different working conditions. The telescopic operation table is telescopic and can reach different positions of a bridge for detection under the working condition, and the telescopic operation table can contract and rotate to the position parallel to the track under the crossing walking condition, so that the trolley can conveniently cross a bridge pier and abutment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridge detection, and relates to a multi-point driving bridge detection device and a use method thereof. BACKGROUND

[0002] When detecting suspension bridges, cable-stayed bridges and tied-arch bridges, due to the limitations of hangers and suspender ropes, even the limitations of street lamp poles of urban bridges, it is very difficult for conventional bridge detection equipment to inspect such bridges, and the bridge detection vehicle frequently retracts the working frame during detection, resulting in low work efficiency and even the inability to detect diseases of the beam bottom near short suspender ropes and short hangers.

[0003] In the currently used detection devices, short-distance tracks are used in cooperation with detection vehicles for detection, but they cannot cross bridge piers, thus limiting the ability to pass through the piers. When passing through the piers, the previous track and the corresponding detection equipment need to be removed, and the equipment needs to be reinstalled at the next detection position, which is a large amount of work and has low detection efficiency. If a track along the same length of the bridge is suspended on both sides of the bridge side beam, and a trolley is arranged on the track to walk along the track, the detection of the entire bridge can be realized. However, since the trolley walks along the track, the driving mode of the trolley restricts the detection efficiency and work reliability. The conventional driving mode is to fix a driver on the trolley, and the driver is usually an internal combustion engine or an electric motor. However, the internal combustion engine is large in pollution and noise, and does not meet the environmental protection requirements; the electric motor driving needs stable power supply equipment, and the main measures are to set up contact wires and lay cables that move with the trolley. However, the contact wires are risky, the length of the moving cables is large, the weight is large, and a cable reel is also needed, which is high in cost and low in efficiency. SUMMARY

[0004] The present application aims to provide a multi-point driving bridge detection device and a use method thereof to solve the technical problems of low detection efficiency of conventional bridge detection equipment, restriction of the driving mode of the trolley in the detection device with a long track cooperating with the trolley on the detection efficiency, work reliability and environmental protection.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: In a first aspect, the present application provides a multi-point driving bridge detection device, comprising a track, a trolley slidingly connected on the track, and a rack arranged on the trolley. A plurality of housings are arranged on the track, an inner housing is slidingly connected in the housings, the relative sliding direction of the inner housing and the housings is the height direction of the bridge, the inner housing and the housings are connected through an elastic reset unit, the elastic force direction of the elastic reset unit is the height direction of the bridge, a first electric contact is arranged on the inner housing, a second electric contact is arranged on the housing, and the first electric contact faces the second electric contact. The inner shell is provided with a driving motor, the driving motor is electrically connected with the first conductive contactor, the output end of the driving motor is connected with a gear through a transmission component, and the rack is simultaneously engaged with at least two gears; when the rack reaches the gear position, the rack is engaged with and pressed against the gear, and the first conductive contactor is in contact with the second conductive contactor; when the rack is separated from the gear, the first conductive contactor is separated from the second conductive contactor. The trolley is provided with a rotating connecting component, and the trolley is connected with a telescopic operation platform through the rotating connecting component.

[0006] Further, the elastic reset unit includes a first elastic reset unit and a second elastic reset unit, the first elastic reset unit and the second elastic reset unit are respectively located on both sides of the inner shell and between the inner shell and the outer shell, the elastic force directions of the first elastic reset unit and the second elastic reset unit are along the height direction of the bridge, the elastic force of the first elastic reset unit is greater than that of the second elastic reset unit, and the first elastic reset unit is located away from the rack.

[0007] Further, the first conductive contactor is a wedge-shaped block conductive contactor, the second conductive contactor is a wedge-shaped groove conductive contactor, and when the rack is engaged with and pressed against the gear, the wedge-shaped block conductive contactor is embedded in the groove of the wedge-shaped groove conductive contactor.

[0008] Further, a plurality of the outer shells are arranged at equal intervals, and the length of the rack is twice the interval between two adjacent outer shells.

[0009] Further, the rotating connecting component includes a columnar connecting shaft, a columnar electromagnetic stator and an electromagnetic mover, the connecting shaft is fixedly connected with the self-propelled trolley, the electromagnetic mover is fixedly connected with the telescopic operation platform, the electromagnetic mover is provided with a containing cavity, the electromagnetic stator is located in the containing cavity, the containing cavity has a cavity opening, the diameter of the electromagnetic stator is greater than that of the cavity opening, the connecting shaft is fixedly connected with the electromagnetic stator through the cavity opening, and the connecting shaft and the electromagnetic stator are coaxially arranged.

[0010] Further, the telescopic operation platform is provided with a distance measuring unit. The telescopic operating platform includes a fixed platform and a sliding platform. The fixed platform is fixedly connected to the rotating connecting component. The fixed platform is provided with several L-shaped connecting plates, and a T-shaped sliding groove is formed between every two L-shaped connecting plates. A T-shaped slide rail is slidably arranged in the T-shaped sliding groove. The T-shaped slide rail is fixedly connected to the sliding platform. The T-shaped slide rail is located between the fixed platform and the sliding platform. A limiting part is provided at the end of the T-shaped slide rail. Both the fixed platform and the sliding platform are provided with guardrails. The spacing between the guardrails on the fixed platform is greater than the spacing between the guardrails on the sliding platform.

[0011] Furthermore, it also includes several suspension rods, several lateral limiters, and several longitudinal limiters. The suspension rods, the lateral limiters, and the longitudinal limiters are all connected to the track and located at the top of the track. The suspension rods are movably connected to the track and located at the top of the track. The suspension rods, the lateral limiters, and the longitudinal limiters are arranged periodically. The trolley is also provided with a passageway, and when the trolley moves on the track, the suspension rod, the lateral limiter and the longitudinal limiter can all pass through the passageway.

[0012] Furthermore, the suspension rod includes a first connecting rod, which is used to fix and connect the bridge to be inspected. The first connecting rod is provided with a connecting sleeve, and the track is provided with a first portal-shaped connecting rod, which passes through the connecting sleeve and is rotatably connected to the connecting sleeve. The first connecting rod is L-shaped; The first portal-shaped connecting rod includes a horizontal bar and two vertical bars. The two vertical bars are arranged in parallel and are fixedly connected to the horizontal bar. The horizontal bar is movably inserted into the connecting sleeve, and the connecting sleeve is located between the two vertical bars. The lateral limiter includes a second connecting rod, a first limiting plate, a second portal connecting rod, and two second limiting plates. The second connecting rod is used to fix the bridge to be tested. The second connecting rod is fixedly connected to the first limiting plate. The two second limiting plates are fixedly connected to the second portal connecting rod. The first limiting plate is located between the two second limiting plates. A first buffer pad is provided on the second limiting plate. The first buffer pad is located between the first limiting plate and the second limiting plate. There is a gap between the first limiting plate and the first buffer pad. The plane where the first limiting plate is located is parallel to the moving direction of the self-propelled trolley. The second portal connecting rod is fixedly connected to the track. The longitudinal limiter includes a third connecting rod, a third limiting plate, a third portal connecting rod, and two fourth limiting plates. The third connecting rod is used to fix the bridge to be tested. The third connecting rod is fixedly connected to the third limiting plate. The two fourth limiting plates are fixedly connected to the third portal connecting rod. The third portal connecting rod is fixedly connected to the track. The third limiting plate is located between the two fourth limiting plates. A second buffer pad is provided on the fourth limiting plate. The second buffer pad is located between the third limiting plate and the fourth limiting plate. There is a gap between the third limiting plate and the second buffer pad. The plane of the third limiting plate is perpendicular to the moving direction of the self-propelled trolley.

[0013] Furthermore, it also includes two long, narrow sliding wheel rails, which are arranged parallel to the track. Rollers are slidably installed inside the sliding wheel rails. The two rollers are connected by a connecting shaft, which is connected to a first suspension rod. The first suspension rod is movably connected to a second suspension rod, which is connected to a fourth portal-shaped connecting rod. The fourth portal-shaped connecting rod is connected to the telescopic operating platform.

[0014] Secondly, the present invention provides a method for using a multi-point driven bridge inspection device, which includes the following steps: The track is suspended on the bridge to be inspected; When the power is turned on, the drive motor containing the gear meshing with the rack starts. The drive motor drives the trolley forward along the track through the gear and rack. When the power supply is switched, the trolley moves backward. During the movement of the trolley, the rack continuously meshes with the front gear and simultaneously separates from the rear gear. When the rack meshes with the gear, it pushes and compresses the gear. The gear then passes through the corresponding drive motor and the inner shell to compress the elastic reset unit. The elastic reset unit is compressed, and the first and second conductive contactors make contact and conduct. The corresponding drive motor is energized and drives the gear to rotate. The gear drives the trolley to continue moving along the track through the rack. When the rack separates from the gear, the elastic reset unit resets, the first and second conductive contactors separate, and the corresponding drive motor is de-energized. After the telescopic operating platform reaches the area to be inspected, the angle of the telescopic operating platform is adjusted by rotating the connecting component, and the length of the telescopic operating platform is also adjusted to facilitate accurate inspection.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention features a trolley slidably connected to a track, providing the basic motion framework for the entire detection device. A rack engages with the drive components, converting rotational motion into linear motion of the trolley. When the rack reaches the gear position, it meshes and presses against the gear. During this meshing and pressing, an elastic reset unit allows the inner shell to move vertically under external force, causing the first conductive contactor to contact the second conductive contactor, thus connecting the circuit. After the rack separates from the gear, the elastic reset unit resets after the external force disappears, disengaging the first and second conductive contactors and disconnecting the circuit. This achieves precise control of the drive motor power supply based on the trolley's position, eliminating the need for moving cables and overcoming the shortcomings of traditional power supply methods. The rack meshes with at least two gears simultaneously, resulting in a large overall torque during trolley movement, allowing for low-voltage power supply and improved safety. Furthermore, the distributed multi-point drive motor arrangement ensures the trolley can continue operating even if some drive motors fail, guaranteeing continuous project progress. A rotating connecting component allows the telescopic operating platform to rotate, adjusting its angle under different working conditions. The telescopic operating platform is extendable, allowing it to reach different locations on the bridge for inspection during operation. When crossing bridges, the platform can retract and rotate to a position parallel to the track, facilitating the trolley's crossing of bridge piers and improving the device's adaptability and flexibility. This invention solves the problems of conventional bridge inspection equipment being limited by booms, cables, and streetlight poles, leading to difficulties in inspection, and the inefficiency caused by the frequent retraction of the bridge inspection vehicle's frame. It also overcomes the problem of short-distance track travel preventing the inspection vehicle from crossing bridge piers, requiring frequent disassembly and assembly of equipment and track, resulting in high workload and low efficiency. This invention uses distributed multi-point drive motors for point-to-point power supply, eliminating the need for moving cables, improving power supply reliability and safety. During trolley movement, power is only supplied to the drive motors in contact with the rack, reducing energy consumption and saving power resources. Even if some drive motors fail, the trolley can continue operating, ensuring the project continues uninterrupted.

[0016] After power is supplied, the drive motor containing the gear meshing with the rack starts, and the rotational motion of the motor is converted into linear motion of the trolley through the gear-rack transmission mechanism, enabling the trolley to move forward along the track. This multi-point drive method allows multiple drive motors to work sequentially, providing continuous power to the trolley, ensuring stable and smooth movement on the track, and improving the efficiency and reliability of the detection device. It avoids the risks and inconveniences associated with moving cables in traditional power supply methods, such as the high risk of contact wires and the high cost and low efficiency of moving cables, reducing the complexity and cost of the device and improving the safety and stability of the power supply. Because it is a multi-point drive, if some drive motors fail, the other normal drive motors can continue to work, ensuring the trolley can continue moving without interrupting the detection work due to the failure of a single drive motor, improving the reliability and fault tolerance of the device, and ensuring the continuous progress of the project. After the telescopic operating platform reaches the area to be detected, the angle and length of the telescopic operating platform can be adjusted by rotating the connecting component to facilitate accurate detection. Adjusting the angle of the telescopic operating platform by rotating the connecting component allows the platform to adapt to the detection needs of different parts of the bridge. Adjusting the length of the telescopic control platform can expand the inspection range, enabling the platform to reach some parts of the bridge that are far from the track or in special locations for inspection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the working state of an embodiment of the present invention; Figure 2 This is a state diagram of the bridge crossing piers according to an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the driving principle of the vehicle according to an embodiment of the present invention; Figure 4 This is a schematic diagram showing the inner shell and outer shell in contact, according to an embodiment of the present invention. Figure 5 This is a schematic diagram showing the inner shell and outer shell in a separated state according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the outer shell structure according to an embodiment of the present invention; Figure 7 This is an assembly diagram of the inner shell, motor, and gears according to an embodiment of the present invention; Figure 8 This is a diagram showing the positional relationship between the trolley and the rack in an embodiment of the present invention; Figure 9 This is a schematic diagram of the telescopic operating table according to an embodiment of the present invention; Figure 10 This is a structural schematic diagram of the telescopic operating platform from another perspective according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the track structure according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the suspension rod according to an embodiment of the present invention; Figure 13 This is a schematic diagram of the structure of the lateral limiter according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the longitudinal limiter according to an embodiment of the present invention; Figure 15 This is a schematic diagram of the sliding wheel rail structure according to an embodiment of the present invention; Figure 16 This is a flowchart of a method according to an embodiment of the present invention.

[0018] The components include: 1. Track; 2. Drive motor; 201. Gear; 202. Inner shell; 203. First conductive contactor; 204. Sliding rib; 205. Outer shell; 206. Sliding groove; 207. Second conductive contactor; 208. First elastic reset unit; 209. Second elastic reset unit; 210. Elastic reset unit; 3. Suspension rod; 301. First connecting rod; 302. Connecting sleeve; 303. First portal-shaped connecting rod; 304. Horizontal bar; 305. Vertical bar; 4. Lateral limiter; 401. Second connecting rod; 402. First limiting plate; 403. Second limiting plate; 404. Second portal-shaped connecting rod; 405. First buffer pad; 5. 1. Longitudinal limiter; 501. Third connecting rod; 502. Third limiting plate; 503. Fourth limiting plate; 504. Third portal connecting rod; 505. Second buffer pad; 6. Trolley; 601. Rack; 602. Pulley; 603. Through groove; 7. Rotary connecting component; 701. Connecting shaft; 702. Electromagnetic stator; 703. Electromagnetic mover; 8. Telescopic operating platform; 801. Fixed platform; 802. Sliding platform; 803. L-shaped connecting plate; 804. T-shaped slide rail; 805. Guardrail; 9. Sliding wheel rail; 901. Connecting shaft; 902. Roller; 903. First suspension rod; 904. Second suspension rod; 905. Fourth portal connecting rod. 10. Bridge; 11. Bridge pier; AB, Bridge height direction. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings: Example 1: See Figures 1 to 3 This invention discloses a multi-point driven bridge inspection device, including a track 1 on which a trolley 6 is slidably connected, providing a basic motion frame for the entire inspection device. The trolley 6 can slide on the track 1 to achieve movement and inspection along the bridge 10. The trolley 6 is equipped with a rack 601, which cooperates with the drive component to convert rotational motion into linear motion of the trolley 6.

[0022] See Figure 3 In this embodiment of the invention, a pulley 602 is provided between the trolley 6 and the track 1 to facilitate the smooth sliding of the trolley 6 on the track 1.

[0023] See Figure 3 and Figure 4 The track 1 is provided with a plurality of outer shells 205, and an inner shell 202 is slidably connected inside the outer shell 205 (see Figure 4 See also Figure 6 See the structural schematic diagram of the outer casing 205. Figure 7 This is a schematic diagram of the inner shell 202. The relative sliding direction between the inner shell 202 and the outer shell 205 is the height direction AB of the bridge. The inner shell 202 and the outer shell 205 are connected by an elastic reset unit 210. The elastic force direction of the elastic reset unit 210 is the height direction AB of the bridge. The inner shell 202 is provided with a first conductive contactor 203, and the outer shell 205 is provided with a second conductive contactor 207. The first conductive contactor 203 is directly opposite the second conductive contactor 207. The elastic reset unit 210 allows the inner shell to move in the height direction when subjected to a certain external force, and the first conductive contactor 203 contacts the second conductive contactor 207, realizing circuit conduction (see...). Figure 4 ), and resets after the external force disappears, while the first conductive contactor 203 and the second conductive contactor 207 separate (seeFigure 5 This allows for precise control of the power supply to the drive motor 2 based on the position of the trolley 6, eliminating the need to move cables and overcoming the shortcomings of traditional power supply methods.

[0024] See Figure 4 , Figure 5 and Figure 6 The inner shell 202 is equipped with a drive motor 2, which is electrically connected to the first conductive contactor 203. The output end of the drive motor 2 is connected to a gear 201 via a transmission component. The rack 601 meshes with at least two of the gears 201 simultaneously, resulting in a large overall torque during the movement of the trolley 6. This allows for low-voltage power supply and improves safety performance. Furthermore, the distributed multi-point drive motor arrangement ensures that the trolley 6 can continue operating even if some drive motors 2 fail, guaranteeing the continuity of the project. When the rack 601 reaches the position of the gear 201, the rack 601 meshes with and presses against the gear 201, and the first conductive contactor 203 contacts the second conductive contactor 207. When the rack 601 separates from the gear 201, the first conductive contactor 203 separates from the second conductive contactor 207. See 5 and Figure 7 In this embodiment of the invention, the elastic reset unit 210 includes a first elastic reset unit 208 and a second elastic reset unit 209. The first elastic reset unit 208 and the second elastic reset unit 209 are respectively located on both sides of the inner shell 202 and between the inner shell 202 and the outer shell 205. The elastic force of the first elastic reset unit 208 and the second elastic reset unit 209 is along the height direction AB of the bridge. The elastic force of the first elastic reset unit 208 is greater than that of the second elastic reset unit 209. The first elastic reset unit 208 is located on the side away from the rack 601.

[0025] See 4 and Figure 5 In this embodiment of the invention, the first conductive contactor 203 is a wedge-shaped block conductive contactor, and the second conductive contactor 207 is a wedge-shaped groove conductive contactor. When the rack 601 meshes with and is pressed against the gear 201, the wedge-shaped block conductive contactor is embedded in the groove of the wedge-shaped groove conductive contactor.

[0026] See Figure 1 system Figure 3 In this embodiment of the invention, several of the outer shells 205 are arranged at equal intervals, and the length of the rack 601 is twice the distance between two adjacent outer shells 205.

[0027] See Figure 3 and Figure 8The trolley 6 is equipped with a rotating connecting component 7, and the trolley 6 is connected to a telescopic operating platform 8 via the rotating connecting component 7. The rotating connecting component 7 allows the telescopic operating platform 8 to rotate, adjusting its angle under different working conditions. The telescopic operating platform 8 is extendable and retractable, enabling it to reach different positions on the bridge 10 for inspection during working conditions. During crossing operations, the telescopic operating platform 8 can retract and rotate to a position parallel to the track 1, facilitating the trolley 6 to cross bridge piers and improving the adaptability and flexibility of the device.

[0028] See Figure 8 and Figure 9 In this embodiment of the invention, the rotating connecting component 7 includes a columnar connecting shaft 701, a columnar electromagnetic stator 702, and an electromagnetic actuator 703. The connecting shaft 701 is fixedly connected to the self-propelled trolley 6, and the electromagnetic actuator 703 is fixedly connected to the telescopic operating platform 8. The electromagnetic actuator 703 has a receiving cavity, and the electromagnetic stator 702 is located in the receiving cavity. The receiving cavity has an opening, and the diameter of the electromagnetic stator 702 is larger than the diameter of the opening. The connecting shaft 701 passes through the opening and is fixedly connected to the electromagnetic stator 702. The connecting shaft 701 and the electromagnetic stator 702 are arranged coaxially.

[0029] In this embodiment of the invention, the telescopic operating platform 8 is equipped with a distance measuring unit. During the crossing and walking operation, when the telescopic operating platform 8 approaches the bridge piers, the distance measuring unit detects the distance and, when the distance reaches a first preset range, issues an alarm or automatically triggers a power cut-off to the drive motor, alerting the operator and ensuring safety by preventing the telescopic operating platform from colliding with the bridge piers. During the working operation, when the distance between the telescopic operating platform 8 and the bridge piers on both sides reaches a second preset range, an alarm is issued to remind the operator to brake, preventing a collision with the piers.

[0030] See Figure 9 and Figure 10 The telescopic operating platform 8 includes a fixed platform 801 and a sliding platform 802. The fixed platform 801 is fixedly connected to the rotating connecting component 7. The fixed platform 801 is provided with a plurality of L-shaped connecting plates 803. A T-shaped sliding groove is formed between every two L-shaped connecting plates 803. A T-shaped slide rail 804 is slidably arranged in the T-shaped sliding groove. The T-shaped slide rail 804 is fixedly connected to the sliding platform 802. The T-shaped slide rail 804 is located between the fixed platform 801 and the sliding platform 802. A limiting part is provided at the end of the T-shaped slide rail 804. Both the fixed platform 801 and the sliding platform 802 are provided with guardrails 805. The spacing between the guardrails 805 on the fixed platform 801 is greater than the spacing between the guardrails 805 on the sliding platform 802.

[0031] See Figure 11In this embodiment of the invention, the device further includes several suspension rods 3, several lateral limiters 4, and several longitudinal limiters 5. The suspension rods 3, lateral limiters 4, and longitudinal limiters 5 are all connected to the track 1 and located at the top of the track 1. The suspension rods 3 are movably connected to the track 1 and located at the top of the track 1. The suspension rods 3, lateral limiters 4, and longitudinal limiters 5 are arranged periodically. During the movement, angle adjustment, and position adjustment of the telescopic operating platform 8, the track 1 will experience appropriate swaying. The suspension rods 3 movably connect to the track 1, preventing concentrated stress at the connection points between the suspension rods 3 and the bridge 10, thus avoiding damage to the bridge. Simultaneously, the lateral limiters 4 and longitudinal limiters 5 limit the swaying of the track 1 in the lateral and longitudinal directions, preventing excessive swaying and enhancing the stability of the device.

[0032] See Figure 8 The trolley 6 is also provided with a passage groove 603. When the trolley 6 moves on the track 1, the suspension rod 3, the lateral limiter 4 and the longitudinal limiter 5 can all pass through the passage groove 603.

[0033] See Figure 12 In this embodiment of the invention, the suspension rod 3 includes a first connecting rod 301, which is used to fix and connect the bridge to be tested. The first connecting rod 301 is provided with a connecting sleeve 302, and the track 1 is provided with a first portal-shaped connecting rod 303. The first portal-shaped connecting rod 303 passes through the connecting sleeve 302 and is rotatably connected to the connecting sleeve 302. The first connecting rod 301 is L-shaped; The first portal-type connecting rod 303 includes a horizontal rod 304 and two vertical rods 305. The two vertical rods 305 are arranged in parallel and are fixedly connected to the horizontal rod 304. The horizontal rod 304 is movably inserted into the connecting sleeve 302, and the connecting sleeve 302 is located between the two vertical rods 305. See Figure 13In this embodiment of the invention, the lateral limiter 4 includes a second connecting rod 401, a first limiting plate 402, a second portal-shaped connecting rod 404, and two second limiting plates 403. The second connecting rod 401 is used to fix the bridge to be tested. The second connecting rod 401 is fixedly connected to the first limiting plate 402. The two second limiting plates 403 are fixedly connected to the second portal-shaped connecting rod 404. The first limiting plate 402 is located between the two second limiting plates 403. A first buffer pad 405 is provided on the second limiting plate 403. The first buffer pad 405 is located between the first limiting plate 402 and the second limiting plate 403. There is a gap between the first limiting plate 402 and the first buffer pad 405. The plane where the first limiting plate 402 is located is parallel to the moving direction of the self-propelled trolley 6. The second portal-shaped connecting rod 404 is fixedly connected to the track 1.

[0034] See Figure 14 In this embodiment of the invention, the longitudinal limiter 5 includes a third connecting rod 501, a third limiting plate 502, a third portal connecting rod 504, and two fourth limiting plates 503. The third connecting rod 501 is used to fix the bridge to be tested. The third connecting rod 501 is fixedly connected to the third limiting plate 502. The two fourth limiting plates 503 are fixedly connected to the third portal connecting rod 504. The third portal connecting rod 504 is fixedly connected to the track 1. The third limiting plate 502 is located between the two fourth limiting plates 503. A second buffer pad 505 is provided on the fourth limiting plate 503. The second buffer pad 505 is located between the third limiting plate 502 and the fourth limiting plate 503. There is a gap between the third limiting plate 502 and the second buffer pad 505. The plane of the third limiting plate 502 is perpendicular to the moving direction of the self-propelled trolley 6.

[0035] See Figure 1 and Figure 15 In this embodiment of the invention, two elongated sliding wheel rails 9 are also included. The sliding wheel rails 9 are arranged parallel to the track 1. Rollers 902 are slidably disposed within the sliding wheel rails 9. The two rollers 902 are connected by a connecting shaft 901. The connecting shaft 901 is connected to a first suspension rod 903. The first suspension rod 903 is movably connected to a second suspension rod 904. The second suspension rod 904 is connected to a fourth portal-shaped connecting rod 905. The fourth portal-shaped connecting rod 905 is connected to the telescopic operating platform 8. When the telescopic operating platform 8 extends, it will generate a large torque. To avoid excessive torque and damage to the equipment, sliding wheel rails 9 are arranged under the bridge 10 to be inspected. The sliding wheel rails 9 are connected to the telescopic operating platform 8 through the rollers 902, the connecting shaft 901, the first suspension rod 903, the second suspension rod 904, and the fourth portal-shaped connecting rod 905, ensuring operational safety and improving operational safety.

[0036] This invention solves the problems of conventional bridge inspection equipment's difficulty in inspection due to limitations imposed by booms, cables, and streetlight poles, as well as the low efficiency caused by the frequent retraction of the bridge inspection vehicle's frame. Simultaneously, it overcomes the problem that short-distance tracks prevent the inspection vehicle from crossing bridge piers, requiring frequent disassembly and assembly of equipment and tracks, resulting in high workload and low efficiency. This invention changes the traditional arrangement of the drive motors 2, employing distributed multi-point drive motors 2 to achieve point-to-point power supply, eliminating the need for moving cables and avoiding the high risks associated with contact wires and the high cost and low efficiency of moving cables, thus improving the reliability and safety of power supply. The multi-point drive of this invention saves costs, as power is only supplied to the drive motors 2 in contact with the rack 601 during the movement of the trolley 6, reducing energy consumption and conserving power resources. Even if some drive motors 2 fail, the trolley 6 can still continue to operate, ensuring the continuity of the project and avoiding disruption to the project schedule. The trolley 6 moves while multiple drive motors 2 work simultaneously, resulting in a large combined torque, and can be powered by low voltage. Safety warnings and automatic power-off protection are achieved through the ranging unit to prevent the telescopic operating platform 8 from colliding with the bridge pier 11. The trolley 6 can be safely started and stopped through a simple power control method, ensuring the safe conduct of the inspection work in all aspects.

[0037] See Figure 16 Based on the above structure, the present invention also discloses a method for using a multi-point driven bridge detection device, comprising the following steps: S1, the track 1 is suspended on the bridge 10 to be inspected, thus establishing a basic motion platform for the entire bridge inspection device.

[0038] S2, power is turned on, and the drive motor 2, which contains the gear 201 meshing with the rack 601, starts. The drive motor 2 drives the trolley 6 forward along the track 1 through the gear 201 and rack 601. Switching the power supply polarity causes the trolley 6 to move backward. The control method is simple and easy to understand, convenient to operate, and easy for maintenance personnel to operate and maintain the device. After the power is turned on, the drive motor containing the gear meshing with the rack starts, and the rotational motion of the motor is converted into the linear motion of the trolley through the gear-rack transmission mechanism, realizing the forward movement of the trolley along the track, enabling the detection device to move to different positions on the bridge for detection.

[0039] S3, during the movement of the trolley 6, the rack 601 continuously meshes with the front gear 201 and simultaneously separates from the rear gear 201. When the rack 601 meshes with the gear 201, it pushes the gear 201. The gear 201, through the corresponding drive motor 2 and inner shell 202, presses against the elastic reset unit 210. The elastic reset unit 210 is compressed, and the first conductive contactor 203 and the second conductive contactor 207 make contact and conduct. The corresponding drive motor 2 is energized and drives the gear 201 to rotate. The gear 201, through the rack 601, drives the trolley 6 to continue moving along the track 1. When the rack 601 separates from the gear 201, the elastic reset unit 210 resets, the first conductive contactor 203 and the second conductive contactor 207 separate, and the corresponding drive motor 2 is de-energized. Through this multi-point drive method, multiple drive motors work sequentially to provide continuous power to the trolley, ensuring that the trolley can move stably and smoothly on the track, improving the movement efficiency and reliability of the detection device. This method avoids the risks and inconveniences associated with moving cables in traditional power supply methods, such as the high risk of contact wires and the high cost and low efficiency of moving cables. It reduces the complexity and cost of the device while improving the safety and stability of the power supply. Because it uses multi-point drive, if some drive motors fail, the other working drive motors can continue to operate, ensuring the trolley can continue moving. The detection work will not be interrupted due to the failure of a single drive motor, improving the reliability and fault tolerance of the device and ensuring the continuous progress of the project.

[0040] S4, after the telescopic operating platform 8 reaches the area to be inspected, the angle and length of the telescopic operating platform 8 are adjusted by rotating the connecting component 7 to facilitate accurate inspection. Adjusting the angle of the telescopic operating platform by rotating the connecting component allows it to adapt to the inspection needs of different parts of the bridge. Adjusting the length of the telescopic operating platform expands the inspection range, enabling it to reach some parts of the bridge that are far from the track or in special locations for inspection.

[0041] Example 2: To achieve efficient and rapid free movement of the trolley 6, this invention abandons the conventional practice of installing an internal combustion engine or drive motor on the trolley 6. Instead, it arranges several drive motors 2 at certain intervals below the lower shaft of the track 1. Since the positions of the drive motors 2 on the track 1 are fixed, there is no need to move the cables. A rack 601 of a certain length is arranged below the trolley 6. The teeth of the rack 601 contact the gears 201 of the drive motor. When the rack 601 and the gears 201 contact, the gears 201 rotate, causing the rack 601 to move, thereby driving the trolley 6 to move.

[0042] The present invention mainly includes a track 1, a drive motor 2, a trolley 6, a telescopic operating platform 8, and a control system.

[0043] Drive motors 2 are distributed below the lower shaft of track 1, with one drive motor 2 placed at regular intervals. Gears 201 are installed at the ends of drive motors 2. Drive motors 2 are embedded in an inner shell 202, which is a rectangular shell open on both the front and back sides and closed on the top, bottom, left, and right sides. The outer sides of the left and right side plates of the inner shell 202 have two protruding sliding ribs, while the top and bottom sides are flat. A wedge-shaped conductive contactor is located above the upper side plate. The wedge-shaped conductive contactor is insulated from the upper side plate of the inner shell 202. When the wedge-shaped conductive contactor is connected to the drive motor 2 by a conductive wire, it supplies power to the drive motor 2.

[0044] The outer shell 205 is slightly larger than the inner shell 202. The outer shell 205 has front and rear openings. Two rectangular sliding grooves 206 are provided on the left and right side plates of the outer shell 205. The upper and lower side plates of the outer shell 205 are flat. A wedge-shaped groove conductive contactor is installed below the upper plate of the outer shell 205. The wedge-shaped groove conductive contactor is insulated from the upper plate of the outer shell 205 and is connected to the power supply cable. The outer shell 205 is fixed to the lower side of the lower shank of the track 1.

[0045] The inner shell 202 is embedded in the outer shell 205. A first elastic reset unit 208 is provided between the upper plate of the inner shell 202 and the upper plate of the outer shell 205. In this embodiment, the first elastic reset unit 208 is a shock-absorbing spring. A second elastic reset unit 209 is provided between the lower plate of the inner shell 202 and the lower plate of the outer shell 205. In this embodiment, the second elastic reset unit 209 is a shock-absorbing spring. The elastic force of the first elastic reset unit 208 is greater than that of the second elastic reset unit 209.

[0046] The protruding sliding ribs 204 on the side plate of the inner shell 202 can be embedded in the sliding grooves 206 of the outer shell 205. In this embodiment, the sliding ribs 204 are rectangular ribs, and the sliding grooves 206 are rectangular slots. The two protruding sliding ribs 204 can move freely up and down along the two sliding grooves 206, and move slightly in other directions. As the sliding ribs 204 move up and down along the sliding grooves 206, the wedge-shaped block conductive contactor and the wedge-shaped groove conductive contactor are closed and separated. When the inner shell 202 moves upward, the wedge-shaped block conductive contactor contacts the wedge-shaped groove conductive contactor below the upper plate of the outer shell 205 to supply power to the drive motor 2. When the inner shell 202 moves downward, the wedge-shaped block conductive contactor separates from the wedge-shaped groove conductive contactor below the upper plate of the outer shell 205, and the drive motor 2 is de-energized.

[0047] A rack 601 of a certain length is installed on the trolley 6. After the rack 601 reaches below the gear 201, the teeth of the rack 601 and the teeth of the gear 201 of the drive motor 2 are in close contact. Under the rotation of the drive motor, the rack 601 drives the trolley 6 to move. The length of the rack 601 is related to the distance between two adjacent drive motors 2. Regardless of the position of the rack 601, it is necessary to ensure that the rack 601 is in effective contact with the gears of two of the drive motors.

[0048] When the drive motor 2 is not in operation, the lower edge of its corresponding gear 201 is lower than the upper edge of the rack 601. When the rack 601 is in close contact with the gear 201, the rack 601 will exert an upward thrust on the gear 201, causing the inner shell 202 to move upward. The wedge-shaped conductive contactor of the inner shell 202 will contact the wedge-shaped groove conductive contactor below the upper plate of the outer shell 205, thereby supplying power to the drive motor 2. The drive motor 2 will then start working, and the rack 601 will drive the trolley 6 to move. After the rack 601 has moved a certain distance, the rack 601 will separate from the drive motor 2. At this time, under the thrust of the first elastic reset unit 208, the inner shell 202 will move downward. The wedge-shaped conductive contactor of the inner shell 202 separates from the wedge-shaped groove conductive contactor below the upper plate of the outer shell 205, stopping the power supply to the drive motor 2. At this time, the front end of the rack 601 is in contact with the gear 201 of the drive motor 2 in front, and pushes the gear 201 in contact with the rack 601 upward. The wedge-shaped conductive contactor of the inner shell 202 then contacts the wedge-shaped groove conductive contactor below the upper plate of the outer shell 205, thus supplying power to the drive motor 2. The drive motor starts to work, and the rack 601 drives the trolley to move. This completes a full working cycle, and the cycle continues to move forward.

[0049] When you need to stop moving, simply turn off the power supply.

[0050] When reversing is required, the positive and negative terminals of the power supply are switched in real time to achieve the reversing operation. The reversing operation works on the same mechanism as the forward operation.

[0051] Based on the above structure, the working method of the present invention is as follows: The first working condition is traversing. When the telescopic operating platform 8 approaches the bridge pier 11 during operation, the distance measuring unit on the telescopic operating platform 8 will issue an alarm when it detects a distance of 1150cm from the bridge pier, and simultaneously reduce the rotation speed of the drive motor 2 to slow down the trolley 6. When the distance measuring unit on the telescopic operating platform 8 detects a distance of 1130cm from the bridge pier, if the operator does not stop cutting off power to the drive motor 2, the controller will automatically trigger a power cut-off to the drive motor 2. After the operator retracts the multi-stage telescopic operating platform 8, rotates the telescopic operating platform 8 to a position parallel to the track 1, and re-energizes the drive motor 2 to drive the trolley 6 forward or backward. When the drive trolley 6 is de-energized, if the rotating telescopic operating platform 8 is not retracted, the command for rotating the telescopic operating platform 8 cannot be executed, power cannot be supplied to the drive controller, and the trolley will not move.

[0052] The second working condition is the operating condition. When the telescopic operating platform 8 is rotated to a direction perpendicular to the track 1, the multi-stage telescopic operating platform 8 can move forward and backward freely with the trolley 6. The telescopic operating platform 8 and the trolley 6 move back and forth within the same span pier. When the telescopic operating platform 8 and the trolley 6 are within 50cm of the bridge piers 11 on both sides, the controller will issue an alarm to remind the operator to take braking measures. If the trolley 6 continues to move, the controller will automatically trigger to cut off the power to the drive motor 2 to prevent the telescopic operating platform 8 from hitting the bridge pier 11.

[0053] This invention changes the traditional arrangement of drive motors, overcomes the constraints of moving cables, and uses distributed multi-point drive motors 2 to achieve point-to-point power supply, eliminating the need for moving cables. Multi-point drive saves costs, as power is supplied only to the drive motors 2 in contact with the rack 601 during the movement of the trolley 6.

[0054] This invention employs a distributed multi-point drive motor 2. Even if some drive motors fail, the trolley 6 can still continue to work, ensuring that the project can continue and avoiding any impact on the project schedule.

[0055] In this invention, the rack 601 contacts the gears 201 of multiple drive motors 2 during the movement of the trolley 6. At this time, the multiple drive motors 2 work simultaneously with a large combined torque, which can be achieved by using low-voltage power supply and improving safety performance.

[0056] In this invention, during the movement of the trolley 6, power is supplied only to the drive motor 2 that is in contact with the rack 601, which helps to reduce energy consumption and save power resources.

[0057] This invention enables the car 6 to move forward and backward by switching the positive and negative terminals of the power supply. The car 6 can be stopped when the power is cut off. The control is simple, safe and reliable and easy to maintain.

[0058] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A multi-point driven bridge inspection device, characterized in that, Includes a track (1), on which a trolley (6) is slidably connected, and the trolley (6) is provided with a rack (601). A plurality of outer shells (205) are arranged on the track (1). An inner shell (202) is slidably connected inside the outer shell (205). The relative sliding direction of the inner shell (202) and the outer shell (205) is the height direction (AB) of the bridge. The inner shell (202) and the outer shell (205) are connected by an elastic reset unit (210). The elastic force direction of the elastic reset unit (210) is the height direction (AB) of the bridge. A first conductive contactor (203) is provided on the inner shell (202), and a second conductive contactor (207) is provided on the outer shell (205). The first conductive contactor (203) is directly opposite the second conductive contactor (207). The inner shell (202) is provided with a drive motor (2), which is electrically connected to the first conductive contactor (203). The output end of the drive motor (2) is connected to a gear (201) through a transmission component. The rack (601) meshes with at least two of the gears (201) simultaneously. When the rack (601) reaches the position of the gear (201), the rack (601) meshes with and presses against the gear (201), and the first conductive contactor (203) contacts the second conductive contactor (207). When the rack (601) separates from the gear (201), the first conductive contactor (203) separates from the second conductive contactor (207). The trolley (6) is provided with a rotating connecting component (7), and the trolley (6) is connected to a telescopic operating table (8) through the rotating connecting component (7).

2. The multi-point driven bridge inspection device according to claim 1, characterized in that, The elastic reset unit (210) includes a first elastic reset unit (208) and a second elastic reset unit (209). The first elastic reset unit (208) and the second elastic reset unit (209) are located on both sides of the inner shell (202) and between the inner shell (202) and the outer shell (205). The elastic force of the first elastic reset unit (208) and the second elastic reset unit (209) is along the height direction (AB) of the bridge. The elastic force of the first elastic reset unit (208) is greater than that of the second elastic reset unit (209). The first elastic reset unit (208) is located on the side away from the rack (601).

3. The multi-point driven bridge inspection device according to claim 1, characterized in that, The first conductive contactor (203) is a wedge-shaped block conductive contactor, and the second conductive contactor (207) is a wedge-shaped groove conductive contactor. When the rack (601) meshes with and is pressed against the gear (201), the wedge-shaped block conductive contactor is embedded in the groove of the wedge-shaped groove conductive contactor.

4. The multi-point driven bridge inspection device according to claim 1, characterized in that, The shells (205) are arranged at equal intervals, and the length of the rack (601) is twice the distance between two adjacent shells (205).

5. The multi-point driven bridge inspection device according to claim 1, characterized in that, The rotating connecting component (7) includes a columnar connecting shaft (701), a columnar electromagnetic stator (702), and an electromagnetic actuator (703). The connecting shaft (701) is fixedly connected to the self-propelled trolley (6), and the electromagnetic actuator (703) is fixedly connected to the telescopic operating table (8). The electromagnetic actuator (703) has a receiving cavity, and the electromagnetic stator (702) is located in the receiving cavity. The receiving cavity has an opening, and the diameter of the electromagnetic stator (702) is larger than the diameter of the opening. The connecting shaft (701) passes through the opening and is fixedly connected to the electromagnetic stator (702). The connecting shaft (701) and the electromagnetic stator (702) are arranged coaxially.

6. The multi-point driven bridge inspection device according to claim 1, characterized in that, The telescopic operating platform (8) is equipped with a distance measuring unit; The telescopic operating platform (8) includes a fixed platform (801) and a sliding platform (802). The fixed platform (801) is fixedly connected to the rotating connecting component (7). The fixed platform (801) is provided with a plurality of L-shaped connecting plates (803). A T-shaped sliding groove is formed between every two L-shaped connecting plates (803). A T-shaped slide rail (804) is slidably arranged in the T-shaped sliding groove. The T-shaped slide rail (804) is fixedly connected to the sliding platform (802). The T-shaped slide rail (804) is between the fixed platform (801) and the sliding platform (802). The end of the T-shaped slide rail (804) is provided with a limiting part. Both the fixed platform (801) and the sliding platform (802) are provided with guardrails (805). The spacing between the guardrails (805) on the fixed platform (801) is greater than the spacing between the guardrails (805) on the sliding platform (802).

7. The multi-point driven bridge inspection device according to claim 1, characterized in that, It also includes several suspension rods (3), several lateral limiters (4) and several longitudinal limiters (5). The suspension rods (3), the lateral limiters (4) and the longitudinal limiters (5) are all connected to the track (1) and located at the top of the track (1). The suspension rods (3) are movably connected to the track (1) and located at the top of the track (1). The suspension rods (3), the lateral limiters (4) and the longitudinal limiters (5) are arranged periodically. The trolley (6) is also provided with a passage groove (603). When the trolley (6) moves on the track (1), the suspension rod (3), the lateral limiter (4) and the longitudinal limiter (5) can all pass through the passage groove (603).

8. The bridge inspection device with multi-degree-of-freedom track and telescopic arm according to claim 7, characterized in that, The suspension rod (3) includes a first connecting rod (301), which is used to fix the bridge to be tested. The first connecting rod (301) is provided with a connecting sleeve (302), and the track (1) is provided with a first portal-shaped connecting rod (303). The first portal-shaped connecting rod (303) passes through the connecting sleeve (302) and is rotatably connected to the connecting sleeve (302). The first connecting rod (301) is L-shaped; The first portal-type connecting rod (303) includes a horizontal bar (304) and two vertical bars (305). The two vertical bars (305) are arranged in parallel. The two vertical bars (305) are fixedly connected to the horizontal bar (304). The horizontal bar (304) is movably inserted into the connecting sleeve (302). The connecting sleeve (302) is located between the two vertical bars (305). The lateral limiter (4) includes a second connecting rod (401), a first limiting plate (402), a second portal connecting rod (404), and two second limiting plates (403). The second connecting rod (401) is used to fix the bridge to be tested. The second connecting rod (401) is fixedly connected to the first limiting plate (402). The two second limiting plates (403) are fixedly connected to the second portal connecting rod (404). The first limiting plate (402) is located between the two second limiting plates (403). The second limiting plate (403) is provided with a first buffer pad (405). The first buffer pad (405) is located between the first limiting plate (402) and the second limiting plate (403). There is a gap between the first limiting plate (402) and the first buffer pad (405). The plane where the first limiting plate (402) is located is parallel to the moving direction of the self-propelled trolley (6). The second portal connecting rod (404) is fixedly connected to the track (1). The longitudinal limiter (5) includes a third connecting rod (501), a third limiting plate (502), a third portal connecting rod (504), and two fourth limiting plates (503). The third connecting rod (501) is used to fix the bridge to be inspected. The third connecting rod (501) is fixedly connected to the third limiting plate (502). The two fourth limiting plates (503) are fixedly connected to the third portal connecting rod (504). The third portal connecting rod (504) is fixedly connected to the rail. The third limiting plate (502) is located between the two fourth limiting plates (503). The fourth limiting plate (503) is provided with a second buffer pad (505). The second buffer pad (505) is located between the third limiting plate (502) and the fourth limiting plate (503). There is a gap between the third limiting plate (502) and the second buffer pad (505). The plane of the third limiting plate (502) is perpendicular to the moving direction of the self-propelled trolley (6).

9. A multi-point driven bridge inspection device according to claim 1, characterized in that, It also includes two long sliding wheel rails (9), which are arranged parallel to the track (1). Rollers (902) are slidably installed in the sliding wheel rails (9). The two rollers (902) are connected by a connecting shaft (901). The connecting shaft (901) is connected to a first suspension rod (903). The first suspension rod (903) is movably connected to a second suspension rod (904). The second suspension rod (904) is connected to a fourth portal-shaped connecting rod (905). The fourth portal-shaped connecting rod (905) is connected to the telescopic operating platform (8).

10. A method of using a multi-point driven bridge inspection device, based on the multi-point driven bridge inspection device according to any one of claims 1 to 9, characterized in that, Includes the following steps: The track (1) is suspended on the bridge (10) to be inspected; When the power is turned on, the drive motor (2) containing the gear (201) meshing with the rack (601) starts. The drive motor (2) drives the trolley (6) forward along the track (1) through the gear (201) and the rack (601). When the power supply is switched, the trolley (6) moves backward. During the movement of the trolley (6), the rack (601) continuously meshes with the front gear (201) and simultaneously separates from the rear gear (201). When the rack (601) meshes with the gear (201), the rack (601) squeezes and pushes the gear (201). The gear (201) then squeezes the elastic reset unit (210) through the corresponding drive motor (2) and the inner shell (202). The elastic reset unit (210) is compressed, and the first conductive contactor (203) is activated. When the second conductive contactor (207) is in contact and connected, the corresponding drive motor (2) is energized and drives the gear (201) to rotate. The gear (201) drives the trolley (6) to continue moving along the track (1) through the rack (601). When the rack (601) separates from the gear (201), the elastic reset unit (210) is reset, the first conductive contactor (203) and the second conductive contactor (207) separate, and the corresponding drive motor (2) is de-energized. After the telescopic operating table (8) reaches the area to be tested, the angle of the telescopic operating table (8) is adjusted by rotating the connecting component (7), and the length of the telescopic operating table (8) is adjusted to facilitate accurate testing.

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