Nondestructive testing device for torsion of vehicle-mounted slab bridge

Abstract

The invention discloses a vehicle-mounted plate bridge torsion nondestructive testing device, and relates to the technical field of bridge detection, the vehicle-mounted plate bridge torsion nondestructive testing device comprises a tractor main body and a measuring vehicle main body, a connecting member is arranged between the tractor main body and the measuring vehicle main body, the connecting member comprises a connecting frame, a connecting plate is arranged in the connecting frame, and a reinforcing plate is arranged between the measuring vehicle main body and the connecting plate. A wheel axle is arranged at the bottom end of the connecting frame, a mounting seat is arranged on the outer wall of the wheel axle, a resonant beam is arranged in the mounting seat, a detection sensor is arranged on the mounting seat, and a flange adjusting mechanism is arranged on the resonant beam. In this way, the vibration characteristic is dynamically adjusted through a mechanical structure, the vibration characteristic is matched with the inherent frequency of the bridge, and therefore the signal-to-noise ratio of a detection signal is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge detection, and more specifically, it relates to a vehicle-mounted non-destructive detection device for torsional of slab bridges. Background Art

[0002] The development of bridge technology promotes the development of human society. In modern times, as the hub of the transportation network, bridges can not only play roles such as crossing obstacles, shortening distances, and transporting materials, but also demonstrate a country's scientific and technological strength, industrial strength, economic strength, and social development level. However, due to poor later maintenance of bridges, the failure of bridges cannot be stopped in time, resulting in huge casualties and property losses, which is regrettable. Fortunately, the successful application of bridge condition monitoring and health monitoring technologies has enabled people to avoid losses of life and property caused by bridge failures.

[0003] A bridge full-state multi-functional intelligent health monitoring system was announced by the publication number CN208805523U, including: a tractor, a connecting member, a measuring vehicle, and a signal collection and processing system. By picking up the dynamic signals of the bridge and finally processing the signal data through a signal processing device, the health condition of the bridge can be obtained. Although the above device can monitor and collect the bridge, in actual use, due to the vibration of the bridge, it will affect the excitation load of the measuring vehicle on the bridge, and then affect the accuracy of the measuring vehicle. For this reason, we propose a vehicle-mounted non-destructive detection device for torsional of slab bridges. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a vehicle-mounted non-destructive detection device for torsional of slab bridges.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: including a tractor main body and a measuring vehicle main body, a connecting member is arranged between the tractor main body and the measuring vehicle main body. The connecting member includes a connecting frame, a connecting plate is arranged inside the connecting frame, a reinforcing plate is arranged between the measuring vehicle main body and the connecting plate, a wheel shaft is arranged at the bottom end of the connecting frame, a mounting seat is arranged on the outer wall of the wheel shaft, a resonant beam is arranged inside the mounting seat, one end of the resonant beam is arranged on the connecting plate, a detection sensor is arranged on the mounting seat, a flange adjusting mechanism is arranged on the resonant beam, the flange adjusting mechanism includes flange members arranged on both sides of the resonant beam, an expansion member is arranged inside the flange member, a driving member is arranged at the bottom end of the connecting frame, and the driving member cooperates with the expansion member to adjust the cross-sectional area.

[0006] Preferably, it also includes a positioning mechanism, which includes a fixing part arranged on the resonant beam, a ring-shaped part is provided in the fixing part, a resistance part is provided in the flange part, an insertion part is provided in the ring-shaped part, the resistance part and the insertion part cooperate with each other, a positioning part is provided in the flange part, an auxiliary part cooperating with the positioning part is provided in the ring-shaped part, and the positioning part and the auxiliary part cooperate to unlock the insertion part.

[0007] Preferably, the flange member includes limiting grooves arranged on both sides of the outer wall of the resonance beam, and flange plates are slidably connected in the limiting grooves on both sides. A limiting block is arranged on one side of the flange plate, and the limiting block is correspondingly slidably connected in the limiting groove.

[0008] Preferably, the extension piece includes a slot arranged in the flange plate, an extension plate is arranged in the slot, adjustment plates are arranged on both sides of the extension plate, a rotating shaft is arranged between the adjustment plates on both sides, a rotating plate is arranged on the outer wall of the rotating shaft, and the rotating plate is correspondingly arranged in the slot.

[0009] Preferably, the driving member includes a driving rod arranged in the expansion plate, an electric push rod is arranged at the bottom end of the connecting frame, a linkage plate is arranged at the output end of the electric push rod, sleeves are arranged on both sides of the linkage plate, circular grooves are correspondingly arranged in the sleeves, a positioning block is integrally formed on the inner wall of the circular groove, a surrounding groove is arranged on the outer wall of the driving rod, and the positioning block is correspondingly slidably connected in the surrounding groove.

[0010] Preferably, the fixing member includes a fixing plate arranged on the outer wall of the resonant beam, the fixing plate is recessed inward to form a mounting groove, an annular groove is provided on the outer wall of the fixing plate, through holes are symmetrically provided between the annular groove and the mounting groove, and a fixing portion is integrally formed at the bottom end of the flange plate, and the fixing portion is correspondingly arranged in the mounting groove.

[0011] Preferably, the annular member includes an annular plate arranged on the outer wall of the fixed plate, a movable plate is symmetrically arranged on the inner wall of the annular plate, a bending portion is formed in the movable plate, a compression spring is arranged in the bending portion, one end of the compression spring is arranged on the inner wall of the through hole, a slot is provided in the fixed portion, and the movable plate is correspondingly abutted in the slot.

[0012] Preferably, the resistance member includes resistance blocks arranged at both ends of the inner wall of the slot, one side corresponding to the resistance blocks on both sides is a wedge-shaped portion, movable holes are provided in the resistance blocks on both sides, and a clamping space is formed between the resistance blocks on both sides. The insertion member includes an insertion block arranged on a movable plate, a clamping block is integrally formed on the insertion block, a clamping portion 1 and a clamping portion 2 are formed on both sides of the clamping block, and the clamping portion 1 and the clamping portion 2 correspondingly abut against the resistance blocks on both sides.

[0013] Preferably, the positioning member includes moving grooves provided in the two side moving plates. Two groups of auxiliary grooves are provided at the bottom ends of the moving grooves. Strip-shaped grooves are vertically formed in the auxiliary grooves. Positioning plates are correspondingly provided in the auxiliary grooves and the moving holes. Strip-shaped blocks are arranged on the outer walls of the positioning plates. The strip-shaped blocks are slidably connected in the strip-shaped grooves correspondingly. The depth of the positioning plate is greater than that of the auxiliary groove. The positioning plate is arranged in the moving groove.

[0014] Preferably, the auxiliary member includes two groups of auxiliary springs symmetrically arranged on the inner walls of the slots. An auxiliary block is arranged on the two groups of auxiliary springs. An extrusion part is arranged on one corresponding surface of the auxiliary block. The extrusion part is matched with the clamping part I and the clamping part II. Triangular blocks are arranged on the surfaces of the two side auxiliary blocks away from each other. The positioning plate is matched with the triangular blocks.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, by designing a variable cross-section resonant beam on the front axle of the vehicle and changing the cross-sectional area of the resonant beam through the flange adjusting mechanism, the natural frequency of the beam body is adjusted. Thus, the present invention dynamically adjusts the vibration characteristics through a mechanical structure to match the natural frequency of the bridge, thereby enhancing the signal-to-noise ratio of the detection signal.

[0017] 2. In the present invention, by controlling the retraction of the electric push rod, the sleeve on the linkage plate is synchronously retracted driven by the electric push rod. Then, the limiting block on the flange plate slides in the limiting groove. Subsequently, the position of the flange plate is positioned through the positioning mechanism. At this time, the electric push rod is controlled by the controller to make the positioning block match the positioning groove, thereby realizing the locking of the position of the flange plate. Thus, the flange adjusting mechanism can not only adjust the cross-sectional area of the flange member, but also realize the positioning of the flange member.

[0018] 3. The present invention is like taking a pulse in traditional Chinese medicine. It does not perform a full-body physical examination all the time, but conducts regular or irregular and timely monitoring to identify the dynamic parameters and health status of the bridge. In this way, the problem of a large amount of data will not occur. Thus, it has high mobility, economy and operability, aiming to greatly reduce the cost of the existing bridge monitoring system, achieve rapid detection, and then cover medium and small-span bridges of equal importance.

[0019] 4. In the present invention, the mode of the bridge is identified based on the response of the vehicle body rather than the response of the bridge. By placing the sensor on the bridge, the data collected is the response of the bridge itself. The response collected by one sensor is the response of the same measuring point at different times. While this device is based on the vehicle scanning method, the sensor is placed on the main body of the measuring vehicle. When the main body of the measuring vehicle passes through the bridge, the vibration of the bridge is transmitted to the main body of the measuring vehicle, and the response of the main body of the measuring vehicle is used as the basis to identify the performance of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This figure shows the overall structural schematic diagram of a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention;

[0021] Figure 2 This figure shows the schematic diagram of the main body of the measuring vehicle of a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention;

[0022] Figure 3 This figure shows the schematic diagram of the connecting member of a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention;

[0023] Figure 4 This figure shows the schematic diagram of the flange adjusting mechanism of a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention;

[0024] Figure 5 This figure shows the schematic diagram of the flange member of a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention;

[0025] Figure 6 This figure shows the unfolded plane schematic diagram of the flange adjusting mechanism of a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention;

[0026] Figure 7 This figure shows the schematic diagram of the fixing member and the annular member of a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention;

[0027] Figure 8 This figure shows a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention Figure 5 The enlarged schematic diagram at position A;

[0028] Figure 9 This figure shows the cooperation schematic diagram of the positioning mechanism of a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention;

[0029] Figure 10 This figure shows the schematic diagram of the positioning member and the auxiliary member of a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention;

[0030] Figure 11 This figure shows the schematic diagram of the driving member of a vehicle-mounted non-destructive testing device for the torsional of a slab bridge proposed by the present invention.

[0031] In the figure: 100, tractor main body; 101, measuring vehicle main body; 102, connecting member; 103, connecting frame; 104, connecting plate; 105, reinforcing plate; 106, wheel axle; 107, mounting seat; 108, resonant beam; 109, detection sensor; 200, flange adjusting mechanism; 201, flange member; 202, extension member; 203, driving member; 300, positioning mechanism; 301, fixing member; 302, annular member; 303, abutting member; 304, inserting member; 305, positioning member; 306, auxiliary member; 201a, limiting groove; 201b, flange plate; 201c, limiting block; 202a, slotted opening; 202b, extension plate; 202c, adjusting plate; 202d, rotating shaft; 202e, rotating plate; 203a, driving rod; 203b, electric push rod; 203c, linkage plate; 203d, sleeve; 203e, circular groove; 203f, positioning block; 203g, surrounding groove; 301a, fixing plate; 301b, mounting groove; 301c, annular groove; 301d, through hole; 301e, fixing portion; 302a, annular plate; 302b, movable plate; 302c, bent portion; 302d, compression spring; 302e, inserting slot; 303a, abutting block; 303b, wedge portion; 303c, movable hole; 303d, clamping space; 304a, inserting block; 304b, clamping block; 304c, first clamping portion; 304d, second clamping portion; 305a, movable groove; 305b, auxiliary groove; 305c, strip-shaped groove; 305d, positioning plate; 305e, strip-shaped block; 306a, auxiliary spring; 306b, auxiliary block; 306c, pressing portion; 306d, triangular block. Detailed implementation manners

[0032] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe in detail the specific implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0033] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from this description. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0034] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selectively exclusive embodiment from other embodiments.

[0035] Embodiment 1 further illustrates a non-destructive detection device for torsional of vehicle-mounted slab bridges proposed by the present invention, including a tractor main body 100 and a measuring vehicle main body 101. A connecting member 102 is provided between the tractor main body 100 and the measuring vehicle main body 101. The connecting member 102 includes a connecting frame 103. A connecting plate 104 is fixedly connected inside the connecting frame 103. A reinforcing plate 105 is fixedly connected between the measuring vehicle main body 101 and the connecting plate 104. A wheel axle 106 is fixedly connected to the bottom end of the connecting frame 103. A mounting seat 107 is integrally formed on the outer wall of the wheel axle 106. A resonant beam 108 is installed inside the mounting seat 107. One end of the resonant beam 108 is fixedly connected to the connecting plate 104. A detection sensor 109 is provided on the mounting seat 107. A flange adjustment mechanism 200 is provided on the resonant beam 108. The flange adjustment mechanism 200 includes flange members 201 provided on both sides of the resonant beam 108. An expansion member 202 is provided inside the flange member 201. A driving member 203 is provided at the bottom end of the connecting frame 103. The driving member 203 and the expansion member 202 cooperate to adjust the cross-sectional area;

[0036] The traditional bridge monitoring system is a direct measurement method, which requires installing a large number of sensors on the bridge, is expensive, has poor reusability, and at the same time, the installation, disassembly, maintenance and repair of the instruments all rely on on-site operations and the bridge must also be blocked, which is a serious interference to traffic services. At present, the number of bridges in China is huge, and the traditional bridge monitoring system is neither economical nor seriously hinders the travel needs of the people;

[0037] The present invention is composed of a tractor main body 100 and a measuring vehicle main body 101. Sensors are installed on the measuring vehicle. When the trailer pulls the measuring vehicle through the bridge to be measured, the sensors installed on the measuring vehicle collect data and transmit it to the data analysis system to achieve real-time monitoring. This method generally only requires two people to operate, the number of sensors is also very small, and because it can be reused for monitoring different bridges, its cost is very low. Since it directly passes on the bridge, there is no need to close the bridge for detection, nor is it necessary to perform dangerous actions to complete the test. In addition, this mobile intelligent device is like taking a pulse in traditional Chinese medicine. It does not perform a full-body examination all the time, but conducts regular or irregular and timely monitoring to identify the dynamic parameters and health status of the bridge, so that the problem of generating a large amount of data will not occur. Such a method has high mobility, economy and operability, in order to greatly reduce the cost of the existing bridge monitoring system, achieve rapid detection, and then cover medium and small-span bridges of equal importance;

[0038] Furthermore, since the measuring vehicle body 101 is considered as an elastic rigid body with two degrees of freedom, vertical and rotation, and the bridge cross section is considered as a rigid body with two degrees of freedom, vertical and torsion, when the measuring vehicle passes through the bridge, the torsion response of the bridge is transmitted to the vehicle body through the contact point at the bottom of the vehicle, and the sensor on the vehicle body captures the response, and the modal information of the bridge can be fed back by analyzing the response. Therefore, the present invention further improves the prior art by fixing a mounting seat 107 on the outer wall of the wheel shaft 106, installing a resonance beam 108 in the mounting seat 107, and detachably installing a detection sensor 109 on the mounting seat 107, and providing a flange adjustment mechanism 200 on the resonance beam 108;

[0039] As can be seen from the above, by designing a variable cross-section resonant beam 108 on the front axle of the vehicle, the cross-sectional area of ​​the resonant beam is changed by the flange adjustment mechanism 200, thereby adjusting the natural frequency of the beam body. Therefore, the core of the present invention is to dynamically adjust the vibration characteristics through the mechanical structure to match the natural frequency of the bridge, thereby enhancing the signal-to-noise ratio of the detection signal;

[0040] Different from the traditional bridge detection, the present device identifies the bridge mode based on the vehicle body response rather than the bridge response. The traditional bridge detection method is to place sensors on the bridge, and the data collected is the response of the bridge itself. The response collected by a sensor is the response of the same measuring point at different times. The present device is based on the vehicle scanning method, and the sensor is placed on the measuring vehicle body 101. When the measuring vehicle body 101 passes through the bridge, the vibration of the bridge is transmitted to the measuring vehicle body 101, and the response of the measuring vehicle body 101 is used as the basis to identify the performance of the bridge.

[0041] At the same time, the present invention further limits the installation method of the flange member 201, and its flange adjustment mechanism 200 also has the effect of assisting the installation of the flange plate 201b. At the same time, a positioning mechanism 300 is auxiliaryly provided on the resonance beam, and its positioning mechanism 300 includes a fixing member 301 arranged on the resonance beam 108, a ring member 302 is provided in the fixing member 301, a resistance member 303 is provided in the flange member 201, and an insert member 304 is provided in the ring member 302. The resistance member 303 and the insert member 304 cooperate with each other, a positioning member 305 is provided in the flange member 201, and an auxiliary member 306 cooperating with the positioning member 305 is provided in the ring member 302. The positioning member 305 and the auxiliary member 306 cooperate to unlock the insert member 304. It can be seen that the state of the flange member 201 is positioned by the positioning mechanism 300, and the position of the flange member 201 is locked by the driving member 203.

[0042] Working principle: When in use, when the tractor main body 100 drives the measuring vehicle main body 101 to pass through the bridge, the torsional response of the bridge is transmitted to the vehicle body through the contact points under the vehicle, and the detection sensor 109 on the vehicle body captures this response and analyzes it, then the modal information of the bridge can be fed back. At the same time, this device designs a variable cross-section resonant beam 108 on the front axle of the vehicle, and changes the cross-sectional area of the resonant beam through the flange adjusting mechanism 200, so as to adjust the natural frequency of the beam body. In this way, the present invention dynamically adjusts the vibration characteristics through the mechanical structure to match the natural frequency of the bridge, thereby enhancing the signal-to-noise ratio of the detection signal. At the same time, the positioning mechanism 300 positions the state of the flange member 201, and the driving member 203 locks the position of the flange member 201. In this way, the flange adjusting mechanism 200 can not only adjust the cross-sectional area of the flange member 201, but also position the flange member 201.

[0043] Embodiment 2

[0044] On the basis of Embodiment 1, the following technical features are added: The flange member 201 includes limiting grooves 201a provided on both sides of the outer wall of the resonant beam 108. Flange plates 201b are slidably connected in the limiting grooves 201a on both sides. One side of the flange plate 201b is fixedly connected with a limiting block 201c, and the corresponding limiting block 201c is slidably connected in the limiting groove 201a. The extension member 202 includes a slot 202a provided in the flange plate 201b. An extension plate 202b is rotatably connected in the slot 202a. Adjusting plates 202c are respectively rotatably connected on both sides of the extension plate 202b. A rotating shaft 202d is rotatably connected between the adjusting plates 202c on both sides. A rotating plate 202e is fixed on the outer wall of the rotating shaft 202d, and the corresponding rotating plate 202e is rotatably connected in the slot 202a;

[0045] By Figures 1 to 5It can be seen that T-shaped limiting grooves 201a are formed on both sides of the outer wall of the resonant beam 108. A T-shaped limiting block 201c is fixedly connected to the side wall of the flange plate 201b. The limiting block 201c is slidably connected in the limiting groove 201a to ensure the stability of the flange plate 201b during installation. The first half of the limiting groove 201a is open, and the opening is larger than the width of the limiting block 201c to facilitate the sliding of the limiting block 201c into it. A slot 202a is provided in the flange plate 201b, and an extension plate 202b is rotatably connected in the slot 202a. The rotation of the extension plate 202b is adjusted by a driving rod 203a. Adjusting plates 202c are rotatably connected to both sides of the extension plate 202b, and a rotating shaft 202d is rotatably connected between the two adjusting plates 202c. A rotating plate 202e is fixed to the outer wall of the rotating shaft 202d, and the rotating plate 202e is correspondingly rotatably connected in the slot 202a. When the extension plate 202b rotates, it drives the adjusting plates 202c to rotate synchronously, achieving the effect of adjusting the cross-sectional area of the flange plate 201b, thereby adjusting the natural frequency of the beam body. In this way, this device dynamically adjusts the vibration characteristics through a mechanical structure to match the natural frequency of the bridge, thereby enhancing the signal-to-noise ratio of the detection signal;

[0046] The driving member 203 includes a driving rod 203a fixedly connected in the extension plate 202b. A telescopic electric cylinder 203b is detachably installed at the bottom end of the connecting frame 103. A linkage plate 203c is installed at the output end of the telescopic electric cylinder 203b. Sleeve barrels 203d are fixedly connected to both sides of the linkage plate 203c. Circular grooves 203e are correspondingly provided in the sleeve barrels 203d. A positioning block 203f is integrally formed on the inner wall of the circular groove 203e. A circumferential groove 203g is provided on the outer wall of the driving rod 203a, and the positioning block 203f is correspondingly slidably connected in the circumferential groove 203g;

[0047] It can be seen from Figures 1 to 11 that a telescopic electric cylinder 203b is installed at the bottom end of the connecting frame 103 through bolts. The telescopic electric cylinder 203b is controlled by a corresponding controller. The telescopic electric cylinder 203b drives the linkage plate 203c to operate. When the linkage plate 203c operates, it drives the sleeve barrels 203d to move synchronously. Since circular grooves 203e are correspondingly provided in the sleeve barrels 203d, a positioning block 203f is integrally formed on the inner wall of the circular groove 203e, and a circumferential groove 203g is provided on the outer wall of the driving rod 203a, and the positioning block 203f is correspondingly slidably connected in the circumferential groove 203g. When the sleeve barrels 203d move, the sleeve barrels 203d do not rotate, and the driving rod 203a is driven to rotate under the deflecting force of the circumferential groove 203g;

[0048] Working principle: As can be seen from Embodiment 1, when it is necessary to adjust the cross-sectional area of the flange plate 201b, only the electric push rod 203b needs to be controlled by the controller. The electric push rod 203b drives the linkage plate 203c to move. While the linkage plate 203c is moving, it drives the sleeve 203d to move synchronously. A positioning block 203f is integrally formed on the inner wall of the circular groove 203e, and a circumferential groove 203g is provided on the outer wall of the driving rod 203a. The corresponding positioning block 203f is slidably connected in the circumferential groove 203g. When the sleeve 203d moves, the sleeve 203d will not rotate. Under the deflecting force of the circumferential groove 203g, the driving rod 203a is driven to rotate. While the driving rod 203a is rotating, it drives the expansion plate 202b to rotate. When the expansion plate 202b rotates, it drives the adjusting plate 202c to rotate synchronously, so as to achieve the effect of changing the cross-sectional area of the flange plate 201b, thereby adjusting the natural frequency of the beam body. In this way, this device dynamically adjusts the vibration characteristics through a mechanical structure to match the natural frequency of the bridge, thereby enhancing the signal-to-noise ratio of the detection signal;

[0049] When installing the flange plate 201b, first control the electric push rod 203b to retract, so that the electric push rod 203b drives the sleeve 203d on the linkage plate 203c to retract synchronously. Then, the limiting block 201c on the flange plate 201b slides in the limiting groove 201a. Subsequently, the position of the flange plate 201b is positioned by the positioning mechanism 300. At this time, the controller controls the electric push rod 203b to make the positioning block 203f match the positioning groove, so as to lock the position of the flange plate 201b. In this way, the flange adjusting mechanism 200 can not only adjust the cross-sectional area of the flange member 201, but also position the flange member 201.

[0050] Embodiment Three

[0051] On the basis of the second embodiment, the following technical features are added: The fixing member 301 includes a fixing plate 301a fixedly connected to the outer wall of the resonant beam. The fixing plate 301a is recessed inward to form a mounting groove 301b. An annular groove 301c is provided on the outer wall of the fixing plate 301a. Through holes 301d are symmetrically provided between the annular groove 301c and the mounting groove 301b. A fixing portion 301e is integrally formed at the bottom end of the flange plate 201b. The fixing portion 301e is correspondingly arranged in the mounting groove 301b. The annular member 302 includes an annular plate 302a rotatably connected to the outer wall of the fixing plate 301a. Movable plates 302b are symmetrically and fixedly connected to the inner wall of the annular plate 302a. A bent portion 302c is formed in the movable plate 302b. A compression spring 302d is fixedly connected in the bent portion 302c. One end of the compression spring 302d is fixedly connected to the inner wall of the through hole 301d. The compression spring 302d is a carbon spring with high strength, which is convenient for daily work use. A slot 302e is provided in the fixing portion 301e. The movable plate 302b correspondingly abuts against the slot 302e;

[0052] It can be Figures 5 to 10 seen that a circular fixing plate 301a is fixedly installed on the outside of the resonant beam. The fixing plate 301a is recessed inward to form an annular mounting groove 301b. An annular groove 301c is provided on the outside of the fixing plate 301a. The annular groove 301c and the mounting groove 301b are communicated through the through hole 301d. The annular plate 302a is connected to the inner wall of the through hole 301d through the compression spring 302d. The annular plate 302a is rotatably connected to the outside of the fixing plate 301a. Movable plates 302b are fixedly connected to the inner wall of the annular plate 302a. The compression spring 302d is installed in the movable plate 302b. Therefore, when the annular plate 302a is rotated, it synchronously drives the movable plate 302b to rotate. At this time, the compression spring 302d deforms;

[0053] The abutting member 303 includes abutting blocks 303a fixedly connected to both ends of the inner wall of the slot 302e. The opposite surfaces of the two abutting blocks 303a are wedge-shaped portions 303b. Movable holes 303c are provided in the two abutting blocks 303a. A clamping space 303d is formed between the two abutting blocks 303a. The inserting member 304 includes an inserting block 304a fixedly connected to the movable plate 302b. A clamping block 304b is integrally formed on the inserting block 304a. Clamping portions one 304c and two 304d are formed on both sides of the clamping block 304b. The clamping portions one 304c and two 304d correspondingly abut against the two abutting blocks 303a;

[0054] It can be Figures 5 to 10It can be seen that the flange plate 201b can be positioned by cooperating with the abutment member 303 and the insertion member 304. The movable plate 302b is L-shaped, and a compression spring 302d is installed at the L-shaped bending portion 302c. The annular plate 302a is reset by the compression spring 302d. The movable plate 302b is fixedly connected with an insertion block 304a, and the insertion block 304a is fixedly connected with an elastically deformable clamping block 304b. A clamping portion 1 304c and a clamping portion 2 304d are formed on both sides of the clamping block 304b. When the clamping block 304b contacts the wedge-shaped portion 303b on the abutting block 303a, the clamping portion 1 304c and the clamping portion 2 304d bend inwards to pass through the clamping space 303d. After passing through the clamping space 303d, the extrusion force disappears, so that the clamping portion 1 304c and the clamping portion 2 304d are clamped on the abutting block 303a.

[0055] The positioning member 305 includes a movable groove 305a provided in the movable plates 302b on both sides, two sets of auxiliary grooves 305b are provided at the bottom of the movable groove 305a, and strip grooves 305c are provided in the vertical direction of the auxiliary groove 305b. Positioning plates 305d are provided in the auxiliary groove 305b and the movable hole 303c correspondingly, and strip blocks 305e are provided on the outer wall of the positioning plate 305d. The strip blocks 305e are correspondingly slidably connected in the strip grooves 305c, and the positioning plate 305d is greater than the depth of the auxiliary groove 305b;

[0056] Depend on Figures 7 to 11 It can be seen that the movable groove 305a is a long strip structure, and an auxiliary groove 305b is provided in the horizontal direction at the bottom of the movable groove 305a, and a strip groove 305c is provided in the vertical direction of the auxiliary groove 305b. The positioning plate 305d is slidably connected to the auxiliary groove 305b and the movable hole 303c, and the position of the positioning plate 305d is limited by the strip block 305e. The positioning plate 305d is greater than the depth of the auxiliary groove 305b. The positioning plate 305d is arranged in the movable groove 305a. When the plate-like structure is inserted into the movable groove 305a, it contacts the positioning plate 305d. Since one side of the positioning plate 305d is an inclined surface, the positioning plate 305d is driven to move in the auxiliary groove 305b and the movable hole 303c until it abuts against the triangular block 306d.

[0057] The auxiliary part 306 includes two groups of auxiliary springs 306a symmetrically and fixedly connected to the inner wall of the slot 302e. The auxiliary springs 306a are carbon springs with high strength, which are convenient for daily work. Two groups of auxiliary blocks 306b are fixedly connected to the auxiliary springs 306a. An extrusion part 306c is integrally formed on the corresponding surface of the auxiliary block 306b. The extrusion part 306c cooperates with the first clamping part 304c and the second clamping part 304d. Triangular blocks 306d are fixedly connected to the opposite sides of the two auxiliary blocks 306b away from each other. The positioning plate 305d cooperates with the triangular blocks 306d. When the positioning plate 305d abuts against the triangular blocks 306d, the two groups of auxiliary blocks 306b are driven to move towards each other, and its extrusion part 306c contacts the first clamping part 304c and the second clamping part 304d. Therefore, the first clamping part 304c and the second clamping part 304d are deformed, and in this way, the inserted part 304 is unlocked;

[0058] Working principle: As can be seen from Embodiment 2, when positioning the flange plate 201b, rotate the annular plate 302a, which synchronously drives the movable plate 302b to rotate. At this time, the compression spring 302d is deformed. Then, the limiting block 201c on the flange plate 201b slides in the limiting groove 201a. As the flange plate 201b slides, the corresponding fixing part 301e abuts against the installation groove 301b. Release the annular plate 302a. Under the restoring force of the compression spring 302d, the movable plate 302b on the annular plate 302a is driven to be stuck in the slot 302e of the fixing part 301e. As the movable plate 302b enters, at this time, the clamping block 304b contacts the wedge part 303b on the abutting block 303a, and its first clamping part 304c and second clamping part 304d bend inward, so as to pass through the clamping space 303d. After passing through the clamping space 303d, the extrusion force disappears, and the first clamping part 304c and the second clamping part 304d are stuck on the abutting block 303a. In this way, the positioning of the flange plate 201b is realized. When unlocking, when inserting a plate-like structure into the movable groove 305a, it contacts the positioning plate 305d. Since one surface of the positioning plate 305d is an inclined surface, the positioning plate 305d is driven to move in the auxiliary groove 305b and the movable hole 303c until it abuts against the triangular block 306d. When the positioning plate 305d abuts against the triangular block 306d, the two groups of auxiliary blocks 306b are driven to move towards each other, and its extrusion part 306c contacts the first clamping part 304c and the second clamping part 304d. Therefore, the first clamping part 304c and the second clamping part 304d are deformed, and in this way, the inserted part 304 is unlocked, so that the positioning of the flange plate 201b can be released.

[0059] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. An in-vehicle slab bridge torsional non-destructive testing device, comprising a tractor main body (100) and a measuring vehicle main body (101), wherein a connecting member (102) is provided between the tractor main body (100) and the measuring vehicle main body (101), characterized in that, The connecting member (102) comprises a connecting frame (103), a connecting plate (104) is arranged in the connecting frame (103), a reinforcing plate (105) is arranged between the measuring vehicle body (101) and the connecting plate (104), a wheel axle (106) is arranged at the bottom end of the connecting frame (103), a mounting seat (107) is arranged on the outer wall of the wheel axle (106), a resonance beam (108) is arranged in the mounting seat (107), one end of the resonance beam (108) is arranged on the connecting plate (104), a detection sensor (109) is arranged on the mounting seat (107), and a flange adjustment mechanism (200) is arranged on the resonance beam (108); The flange adjustment mechanism (200) comprises flange members (201) arranged on both sides of the resonant beam (108), an extension member (202) is arranged inside the flange member (201), a driving member (203) is arranged at the bottom end of the connecting frame (103), and the driving member (203) and the extension member (202) cooperate to adjust the cross-sectional area.

2. The non-destructive detection device for torsional of vehicle-mounted slab bridge according to claim 1, wherein, The invention also comprises a positioning mechanism (300), wherein the positioning mechanism (300) comprises a fixing member (301) arranged on the resonant beam (108), an annular member (302) is arranged inside the fixing member (301), a resisting member (303) is arranged inside the flange member (201), an inserting member (304) is arranged inside the annular member (302), the resisting member (303) and the inserting member (304) cooperate with each other, a positioning member (305) is arranged inside the flange member (201), an auxiliary member (306) cooperating with the positioning member (305) is arranged inside the annular member (302), and the positioning member (305) and the auxiliary member (306) cooperate with each other to unlock the inserting member (304).

3. The vehicle-mounted slab bridge torsional non-destructive detection device according to claim 2, characterized in that, The flange member (201) comprises limiting grooves (201a) arranged on both sides of the outer wall of the resonance beam (108), flange plates (201b) are slidably connected in the limiting grooves (201a) on both sides, and a limiting block (201c) is arranged on one side of the flange plate (201b), and the limiting block (201c) is correspondingly slidably connected in the limiting groove (201a).

4. The vehicle-mounted slab bridge torsional non-destructive detection device according to claim 3, characterized in that, The extension member (202) comprises a slot (202a) arranged in the flange plate (201b), an extension plate (202b) being arranged in the slot (202a), adjustment plates (202c) being arranged on both sides of the extension plate (202b), a rotating shaft (202d) being arranged between the adjustment plates (202c) on both sides, a rotating plate (202e) being arranged on the outer wall of the rotating shaft (202d), and the rotating plate (202e) being arranged in the slot (202a) accordingly.

5. The nondestructive detection device for torsional of vehicle-mounted slab bridge according to claim 4, characterized in that, The driving member (203) includes a driving rod (203a) disposed in the extension plate (202b). An electric push rod (203b) is provided at the bottom end of the connecting frame (103). A linkage plate (203c) is provided at the output end of the electric push rod (203b). Sleeves (203d) are respectively provided on both sides of the linkage plate (203c). Corresponding circular grooves (203e) are provided in the sleeves (203d). A positioning block (203f) is integrally formed on the inner wall of the circular groove (203e). A circumferential groove (203g) is provided on the outer wall of the driving rod (203a). The positioning block (203f) is slidably connected to the circumferential groove (203g) correspondingly.

6. The non-destructive torsional detection device for vehicle-mounted slab bridges according to claim 5, characterized in that, The fixing member (301) includes a fixing plate (301a) disposed on the outer wall of the resonant beam (108). An installation groove (301b) is formed by the inward depression of the fixing plate (301a). An annular groove (301c) is provided on the outer wall of the fixing plate (301a). Through holes (301d) are symmetrically provided between the annular groove (301c) and the installation groove (301b). A fixing portion (301e) is integrally formed at the bottom end of the flange plate (201b). The fixing portion (301e) is correspondingly disposed in the installation groove (301b).

7. The vehicle-mounted slab bridge torsional non-destructive testing device according to claim 6, wherein, The annular member (302) includes an annular plate (302a) disposed on the outer wall of the fixing plate (301a). Movable plates (302b) are symmetrically provided on the inner wall of the annular plate (302a). A bent portion (302c) is formed in the movable plate (302b). A compression spring (302d) is disposed in the bent portion (302c). One end of the compression spring (302d) is disposed on the inner wall of the through hole (301d). A slot (302e) is provided in the fixing portion (301e). The movable plate (302b) correspondingly abuts against the slot (302e).

8. The vehicle-mounted slab bridge torsional non-destructive detection device according to claim 7, characterized in that, The abutting member (303) includes abutting blocks (303a) provided at both ends of the inner wall of the slot (302e). The opposite surfaces of the two abutting blocks (303a) are wedge-shaped portions (303b). Moving holes (303c) are provided in the two abutting blocks (303a). A clamping space (303d) is formed between the two abutting blocks (303a). The inserting member (304) includes an inserting block (304a) provided on the movable plate (302b). A clamping block (304b) is integrally formed on the inserting block (304a). Clamping portions one (304c) and two (304d) are formed on both sides of the clamping block (304b). The clamping portions one (304c) and two (304d) correspondingly abut against the two abutting blocks (303a).

9. The vehicle-mounted slab bridge torsion non-destructive detection device according to claim 8, characterized in that, The positioning member (305) includes moving grooves (305a) provided in the two side moving plates (302b). Two groups of auxiliary grooves (305b) are provided at the bottom ends of the moving grooves (305a). A strip-shaped groove (305c) is provided in the vertical direction of the auxiliary grooves (305b). A positioning plate (305d) is provided corresponding to the auxiliary grooves (305b) and the moving holes (303c). A strip-shaped block (305e) is provided on the outer wall of the positioning plate (305d). The strip-shaped block (305e) is slidably connected to the strip-shaped groove (305c) correspondingly. The positioning plate (305d) is larger than the depth of the auxiliary groove (305b).

10. The non-destructive detection device for torsional of vehicle-mounted slab bridge according to claim 9, characterized in that, The auxiliary member (306) includes two groups of auxiliary springs (306a) symmetrically arranged on the inner walls of the insertion slots (302e). An auxiliary block (306b) is provided on the two groups of auxiliary springs (306a). An extrusion part (306c) is provided on one corresponding surface of the auxiliary block (306b). The extrusion part (306c) cooperates with the first clamping part (304c) and the second clamping part (304d). Triangular blocks (306d) are provided on the surfaces of the two side auxiliary blocks (306b) away from each other. The positioning plate (305d) cooperates with the triangular blocks (306d).

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