Radiation detection device for internal defects of highway bridge

Abstract

The utility model relates to the technical field of bridge detection, and provides a highway bridge internal defect radiation detection device which comprises traction equipment and detection equipment, the traction equipment comprises a cab and a rear frame, the cab is fixedly connected with the rear frame, the detection equipment is located on the rear frame, and the detection equipment is fixedly connected with the rear frame. The detection equipment comprises a radiation emitting device and a radiation receiving device, the radiation emitting device and the radiation receiving device are both fixedly connected with the rear frame, the radiation emitting device is located on the left side of the advancing direction of the traction equipment, and the radiation receiving device is located on the right side of the advancing direction of the traction equipment; the radiation receiving device includes a second deployment structure and a radiation receiver. According to the technical scheme, the problems that in the prior art, a nondestructive testing technology has inherent limitation in the aspect of insight into fine structures and hidden defects in roads and bridges, and the internal structures and defects of the roads and bridges are difficult to know are solved.

Description

Technical Field

[0001] This utility model relates to the field of bridge inspection technology, specifically to a radiation detection device for internal defects in highway bridges. Background Technology

[0002] With the vigorous development of the social economy and the continuous acceleration of urbanization, road and bridge engineering projects in various cities and regions have ushered in a construction boom, with both the scale and number of projects showing rapid growth. Correspondingly, highway bridge safety inspection technology, as a key support for ensuring the long-term service of road and bridge facilities and maintaining the stable operation of the transportation network, has also entered a period of rapid development.

[0003] In the landscape of non-destructive testing (NDT) technologies for roads and bridges, spectrum analysis, fiber optic sensing, imaging technologies (such as infrared imaging and laser holography), ultrasonic testing, and ground-penetrating radar (GPR) have secured significant positions. However, it's undeniable that these traditional NDT technologies have inherent limitations in understanding the intricate internal structure and hidden defects of roads and bridges, particularly in accurately detecting critical information concerning the structural safety foundation, such as steel reinforcement corrosion and deep concrete cracks. Given that the integrity and health of the internal structure are core indicators of road and bridge safety in many scenarios, there is an urgent need to introduce and vigorously develop a new NDT paradigm based on radiation imaging technology. This approach, utilizing highly penetrating and precise radiation methods, can deeply "see through" the interior of roads and bridges, accurately assess structural conditions, solidify the technological foundation for road and bridge safety inspection, and empower the stable operation and maintenance of transportation infrastructure. Utility Model Content

[0004] This invention proposes a radiation detection device for internal defects of highway bridges, which solves the inherent limitations of non-destructive testing technology in understanding the fine internal structure and hidden defects of roads and bridges, making it difficult to know the internal structure and defects of roads and bridges.

[0005] The technical solution of this utility model is as follows:

[0006] A radiation detection device for internal defects of highway bridges includes a traction device and a detection device. The traction device includes a cab and a rear frame, with the cab fixedly connected to the rear frame. The detection device is located on the rear frame and fixedly connected to it. The detection device includes a radiation emitting device and a radiation receiving device, both fixedly connected to the rear frame. The radiation emitting device is located on the left side of the traction device's forward direction, and the radiation receiving device is located on the right side of the traction device's forward direction. The radiation emitting device includes a first deployment structure for deploying a radiation generator and a radiation emitting device, and the radiation receiving device includes a second deployment structure for deploying a radiation receiver and a radiation receiver.

[0007] Furthermore, the first unfolding structure includes a first rotating base, a first vertical lifting arm, a first rotating disk, and a first telescopic arm. The first rotating base is rotatably connected to the rear frame, the first vertical lifting arm is fixedly connected to the rotating end of the first rotating base, the first rotating disk is rotatably connected to the lifting end of the first vertical lifting arm, the first telescopic arm is fixedly connected to the rotating end of the first rotating disk, and a radiation emitter is slidably connected to the first telescopic arm.

[0008] Furthermore, the first telescopic arm includes a first main support arm and two first extension arms. The two first extension arms are respectively embedded into the first main support arm from both ends. The first extension arms are slidably connected to the first main support arm. Both the first extension arms and the first main support arm are provided with first slide rails. The first slide rails of the first extension arms overlap with the first slide rails of the first extension arms. One side of the radiation emitter is embedded in the first slide rail and slides along the first slide rail.

[0009] Furthermore, the second unfolding structure includes a second rotating base, a second vertical lifting arm, a second rotating disk, a third rotating disk, and a second telescopic arm. The second rotating base is rotatably connected to the rear frame. The second vertical lifting arm is fixedly connected to the rotating end of the second rotating base. The second rotating disk is fixedly connected to the telescopic end of the second vertical lifting arm. The third rotating disk is fixedly connected to the rotating end of the second rotating disk. The second telescopic arm is fixedly connected to the rotating end of the third rotating disk. The third rotating disk and the second rotating disk are perpendicular to each other. A radiation receiver is slidably connected to the second telescopic arm.

[0010] Furthermore, the second telescopic arm includes a second main support arm and a second extension arm. One end of the second main support arm is fixedly connected to the rotating end of the third rotating disk. The second extension arm is embedded in one end of the second main support arm away from the third rotating disk. The second extension arm is slidably connected to the second main support arm. Both the second main support arm and the second extension arm are provided with a second slide rail. The second slide rail of the second main support arm overlaps with the second slide rail of the second extension arm. One side of the radiation receiver is embedded in the second slide rail and slides along the second slide rail.

[0011] Furthermore, the radiation emitter includes an electron accelerator and a collimator, the electron accelerator being fixedly connected to the first deployment structure, and the collimator being fixedly connected to the output end of the electron accelerator.

[0012] Furthermore, the radiation receiver employs a flat panel detector, which includes a scintillator layer, a photoelectric conversion layer, and a thin-film transistor array. The scintillator layer is fixedly connected to the photoelectric conversion layer, and the side of the photoelectric conversion layer facing away from the scintillator layer is fixedly connected to the thin-film transistor array.

[0013] The working principle and beneficial effects of this utility model are as follows:

[0014] 1. This utility model adopts radiation detection. The radiation beam has strong penetrability and can penetrate deep into the concrete protective layer to directly hit the steel bars and deep structures. The radiation emission and receiving devices work together to accurately capture and image the subtle changes of the rays after passing through the internal structure, clearly showing the material change areas caused by steel corrosion, the abnormal ray attenuation areas caused by cracks, etc., and making the invisible internal hidden dangers visible.

[0015] 2. This utility model relies on the mobility of the traction equipment, which can quickly switch between different bridge sections. The rear frame carries the testing equipment and operates stably. The unfolded structure is adapted to various bridge shapes. Whether it is a straight bridge, an arch bridge, or a cable-stayed bridge, the testing position can be flexibly adjusted, breaking through traditional limitations. It efficiently and comprehensively ensures the testing needs of the internal structure of the bridge, fills the shortcomings of existing technology, and helps to accurately assess bridge safety with its advantages of high penetration, high flexibility, and high adaptability. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is the left view of the present invention;

[0019] Figure 3 This is the right view of the present invention;

[0020] Figure 4 This is a schematic diagram of the working process of this utility model.

[0021] In the diagram: 1. Towing equipment; 11. Cab; 12. Rear frame; 21. First rotating base; 22. First vertical lifting arm; 23. First rotating disk; 24. First telescopic arm; 31. Second rotating base; 32. Second vertical lifting arm; 33. Second rotating disk; 34. Third rotating disk; 35. Second telescopic arm; 4. Radiation emitter; 5. Radiation receiver. Detailed Implementation

[0022] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0023] like Figures 1-4As shown in the figure, this embodiment proposes a radiation detection device for internal defects of highway bridges, including a traction device and a detection device. The traction device includes a cab and a rear frame, with the cab fixedly connected to the rear frame. The detection device is located on the rear frame and fixedly connected to the rear frame. The detection device includes a radiation emitting device and a radiation receiving device, both of which are fixedly connected to the rear frame. The radiation emitting device is located on the left side of the traction device's forward direction, and the radiation receiving device is located on the right side of the traction device's forward direction. The radiation emitting device includes a first deployment structure for deploying a radiation generator and a radiation emitting device, and the radiation receiving device includes a second deployment structure for deploying a radiation receiver and a radiation receiver.

[0024] The traction equipment is used for overall load-bearing and movement. Its cab serves as the operator's control space, providing manual control support for the device's operation. Operators can drive the entire device along the bridge to the designated inspection position. The rear frame is a stable load-bearing platform, fixedly connected to the cab to ensure structural integrity and provide a foundation for the inspection equipment, allowing it to flexibly move between different bridge sections for operation. The radiation emission device is the source of radiation generation and directional output. The first deployment structure can adjust the attitude and position of the radiation generator as needed, ensuring that the radiation is emitted at the appropriate angle and direction to adapt to different bridge structural contours. The radiation emitter is the core component that generates radiation rays. By emitting rays of specific energy and intensity, it deeply probes the internal structure of the bridge, detecting deep defects that are difficult to find using traditional methods, such as steel corrosion and tiny cracks inside the concrete. The second deployment structure assists the radiation receiver in accurately aligning the radiation emission direction, adapting to spatial changes during inspection of different parts of the bridge, and ensuring efficient ray reception. The radiation receiver converts the received ray signals into identifiable and processable data (such as electrical signals and optical signals), providing raw material for subsequent analysis of the internal structural condition. The radiation receiving device is used to receive radiation signals passing through the bridge. A second deployment structure assists the radiation receiver in precisely aligning the radiation emission direction, adapting to spatial changes during inspection of different parts of the bridge, and ensuring efficient X-ray reception. The radiation receiver is responsible for receiving X-ray signals passing through the internal structure of the bridge and converting them into processable electrical signals or other forms of signals. During the inspection process, it works closely with the radiation emitter, analyzing parameters such as the intensity, phase, and frequency of the received signals to infer changes in the internal structure of the bridge, thereby determining the presence and characteristics of defects. Placing the radiation emitter on the left side of the traction equipment's forward direction allows it to deploy to the left of the traction equipment, emitting X-rays from the bridge deck downwards, thus preventing the X-rays from affecting the health of personnel on the bridge deck. Placing the radiation receiving device on the right side of the traction equipment's forward direction allows it to deploy to the right of the traction equipment, passing through the side of the bridge and reaching the back of the bridge, thereby receiving the X-rays emitted by the radiation emitter.

[0025] In this embodiment, the first unfolding structure includes a first rotating base, a first vertical lifting arm, a first rotating disk, and a first telescopic arm. The first rotating base is rotatably connected to the rear frame, the first vertical lifting arm is fixedly connected to the rotating end of the first rotating base, the first rotating disk is rotatably connected to the lifting end of the first vertical lifting arm, the first telescopic arm is fixedly connected to the rotating end of the first rotating disk, and a radiation emitter is slidably connected to the first telescopic arm.

[0026] The first rotating base, serving as the basic support and orientation adjustment component of the radiation emission device, is rotatably connected to the rear frame, enabling flexible rotation of the radiation emission direction in the horizontal plane. Operators can drive its rotation according to the bridge alignment and the lateral orientation requirements of key inspection areas, thereby changing the horizontal orientation of the entire radiation emission assembly above and ensuring precise coverage of the target detection area by the radiation beam. The first rotating base can be a hydraulic rotary table, which utilizes a hydraulic system to achieve rotation. A hydraulic motor drives the slewing bearing to rotate via a reducer. The pressure and flow rate of the hydraulic system can be adjusted according to the load, thereby controlling the rotation speed and torque. The hydraulic rotary table is existing technology, and its specific structure will not be described in detail in this embodiment. The first vertical lifting arm is responsible for adjusting the vertical position of the radiation emission assembly. Relying on a stable foundation fixedly connected to the rotating end of the first rotating base, it changes the height of the radiation emitter through its own lifting action, thus adapting to a wider range of bridge surface conditions. The first vertical lifting arm can be a telescopic lifting arm, composed of multiple sleeve-type arm sections, typically extended or retracted via a hydraulic system or electric screw. In a hydraulically driven telescopic boom, hydraulic cylinders are installed inside the boom body, changing the boom's height by extending and retracting each boom section. Telescopic booms are existing technology, and their specific structure will not be described in detail in this embodiment. A first rotating disk is installed at the lifting end of the vertical boom, providing rotation around the vertical axis for the subsequently connected first telescopic boom. After the vertical boom is positioned at the correct height, the rotating disk can fine-tune the angle of the radiation emitter, further calibrating the radiation emission direction and precisely adjusting the emission angle to match the normal direction of the structural surface, optimizing the penetration effect. The first rotating disk can be a hydraulic rotary disk located at the same distance from the first rotating base. Through its foldable design, the first telescopic boom can effectively shorten the overall extension length of the radiation emitter when bridge inspection work is completed or when relocation is required, making it easier to store and avoiding potential obstruction risks to pedestrians and vehicles passing by the bridge due to excessively long radiation emitters.

[0027] In this embodiment, the first telescopic arm includes a first main support arm and two first extension arms. The two first extension arms are respectively embedded into the first main support arm from both ends. The first extension arms are slidably connected to the first main support arm. Both the first extension arms and the first main support arm are provided with first slide rails. The first slide rails of the first extension arms overlap with each other. One side of the radiation emitter is embedded in the first slide rail and slides along the first slide rail.

[0028] The first main support arm, as the core support structure of the whole, provides a stable installation foundation for the radiation emitter, ensuring its stability under various complex bridge inspection environments (such as vibration, wind, and other interference), thereby ensuring the accuracy of the radiation emission direction. The first main support arm should have a power transmission mechanism (such as a hydraulic cylinder or electric push rod). The telescopic design of the two first extension arms greatly increases the adjustable range of the radiation emitter. When inspecting bridges of different widths, the extension length of the extension arms can be flexibly adjusted according to the bridge width, allowing the radiation emitter to cover a wider area and improve inspection efficiency and comprehensiveness. The two first extension arms are embedded and slidably connected from both ends of the first main support arm; this nested design utilizes a principle similar to multi-stage sleeves. Taking a hydraulically driven telescopic arm as an example, the cylinder of the hydraulic cylinder is fixed inside the main support arm near one end, and the piston rod is connected to the extension arm. When hydraulic oil pushes the piston rod to extend or retract, it causes the extension arm to slide relative to the main support arm. This telescopic boom structure is widely used and technologically mature in the field of engineering machinery (such as crane telescopic booms, fire truck ladder telescopic booms, etc.). Its internal structure and principle are well known to the public, and will not be described in detail in this embodiment.

[0029] Both the first main support arm and the first extension arm are equipped with first slide rails, which serve as guides and stabilizers, ensuring that the extension arm moves along a predetermined straight line during extension and retraction, preventing deviation or swaying. The sliding connection between the radiator and the first slide rail can be achieved using a slider and guide rail mechanism. A slider adapted to the shape of the first slide rail can be installed on one side of the radiator. A roller can be installed inside the slider, and a motor is installed inside the radiator. The output shaft of the motor is connected to the roller mounted on the slider via a transmission mechanism (such as gear drive, belt drive, etc.). When the motor starts, it drives the roller to roll on the first slide rail. Due to the friction between the roller and the slide rail, and the fixed connection between the slider and the radiator, the radiator is propelled along the first slide rail. For example, if gear drive is used, a small gear is installed on the roller shaft, and a large gear meshing with it is installed on the motor output shaft. By adjusting the gear ratio, precise control of the radiator's movement speed can be achieved. Meanwhile, to ensure the smooth operation and positioning accuracy of the radiator on the slide rail, guiding devices, such as lateral rollers or protrusions that engage with grooves on the side of the slide rail, are installed on the slider or radiator to prevent lateral displacement during movement. Furthermore, position sensors, such as photoelectric encoders, can be integrated into the motor control system to provide real-time feedback on the radiator's position, allowing for precise control of its sliding position on the slide rail according to detection requirements. Similar motor-driven sliding connection technologies are widely used and relatively mature in industrial automation equipment and machining equipment, and will not be elaborated upon in this embodiment.

[0030] In this embodiment, the second unfolding structure includes a second rotating base, a second vertical lifting arm, a second rotating disk, a third rotating disk, and a second telescopic arm. The second rotating base is rotatably connected to the rear frame. The second vertical lifting arm is fixedly connected to the rotating end of the second rotating base. The second rotating disk is fixedly connected to the telescopic end of the second vertical lifting arm. The third rotating disk is fixedly connected to the rotating end of the second rotating disk. The second telescopic arm is fixedly connected to the rotating end of the third rotating disk. The third rotating disk and the second rotating disk are perpendicular to each other. A radiation receiver is slidably connected to the second telescopic arm.

[0031] The second rotating base, serving as the horizontal foundation and starting point for azimuth adjustment of the radiation receiving device, is rotatably connected to the rear frame. It drives the entire upper radiation receiving assembly to rotate flexibly in the horizontal direction, giving the device horizontal mobility. The second vertical lifting arm is responsible for adjusting the vertical position of the radiation receiving assembly. Securely connected to the rotating end of the second rotating base, its own lifting function allows for adjusting the height of the radiation receiver as needed. Given the varying heights of bridge structures, such as high piers and multi-layered beam structures, the vertical lifting arm precisely raises or lowers the receiver height to accurately match the height at which the rays exit the bridge, ensuring the signal is captured at the optimal receiving height and preventing signal loss and scattering during propagation due to height inaccuracies, which would affect reception. The second rotating disk, installed at the telescopic end of the second vertical lifting arm, provides horizontal rotation around the vertical axis for subsequent connecting components. After the vertical lifting arm has a fixed height, its rotation allows for fine-tuning of the horizontal angle of the radiation receiver, further calibrating its match with the radiation emission direction. Especially when there are irregular changes in the bridge structure, such as horizontal tilting or torsion, the receiving angle is precisely adjusted to ensure that the rays are almost perpendicularly incident on the receiver, optimizing signal reception efficiency and quality. The third rotating disk gives the radiation receiver the ability to rotate vertically around the horizontal axis. Given the complex shape of the bridge structure, such as vertical slopes and curved surfaces, the direction of the rays changes in the vertical plane after they pass through. The third rotating disk can flexibly adjust the vertical angle of the radiation receiver to dynamically adapt to the angle of the passing rays, ensuring that the signal is "fully received" under complex three-dimensional structures. Breaking through the limitations of conventional two-dimensional adjustment, it achieves all-round three-dimensional angle adaptation of radiation reception, copes with the multi-angle changes of rays caused by various complex bridge structures, greatly enhances reception stability and accuracy, and deeply uncovers information on subtle defects hidden inside complex structures, laying a solid data foundation for in-depth bridge safety assessment. The core function of the second telescopic arm is to flexibly change its shape. After the inspection is completed or when transferring, it can be quickly folded, greatly shortening its length to fit the storage space of the rear frame, facilitating equipment transportation and transfer, and avoiding the obstruction and collision risks caused by protruding parts. The second rotating base, the second rotating disk, and the third rotating disk can all be the hydraulic rotary disks described above. The second vertical lifting arm can be the telescopic lifting arm described above.

[0032] In this embodiment, the second telescopic arm includes a second main support arm and a second extension arm. One end of the second main support arm is fixedly connected to the rotating end of the third rotating disk. The second extension arm is embedded in the end of the second main support arm that is away from the third rotating disk. The second extension arm is slidably connected to the second main support arm. Both the second main support arm and the second extension arm are provided with second slide rails. The second slide rail of the second main support arm overlaps with the second slide rail of the second extension arm. The radiation receiver side is embedded in the second slide rail and slides along the second slide rail.

[0033] The second main support arm and the second extension arm share the same specific structure and principle as the first main support arm and the first extension arm. This similar design gives the radiation receiving device good structural flexibility and stability. The second main support arm provides basic support for the entire structure, ensuring stability under various working conditions. The second extension arm can be flexibly extended and retracted according to actual detection needs, expanding the coverage area of ​​the radiation receiver and effectively adapting to the detection tasks of bridges of different widths. The detailed structure and principle will not be elaborated in this embodiment. The sliding connection between the radiation receiver and the second slide rail is based on the same principle as the sliding connection between the radiation emitter and the first slide rail. Through this sliding connection, the radiation receiver can move smoothly and accurately on the second slide rail. Whether adjusting the receiving angle to adapt to different incident directions of rays or performing scanning detection along the length of the bridge, the task can be completed efficiently and reliably. The specific connection structure and principle will not be elaborated in this embodiment.

[0034] The coordination process of the radiation emitter and receiver: During bridge internal defect detection, the radiation emitter and receiver are aligned to ensure that the X-rays emitted by the emitter are stably received by the receiver. Then, the emitter and receiver move simultaneously at the same speed. During this movement, the emitter continuously emits rays with specific energy and intensity. These rays penetrate the bridge's internal structure. Due to different materials (such as steel reinforcement and concrete) and existing defects (such as cracks and voids) within the bridge, the rays undergo varying degrees of attenuation and scattering. The receiver synchronously receives the altered X-ray signals after they have passed through the bridge's interior and converts them into analyzable data. By analyzing the received signals, such as changes in signal strength and waveform distortion, the presence, location, size, and type of defects within the bridge are determined, thus completing a comprehensive detection and assessment of the bridge's internal defects.

[0035] In this embodiment, the radiation emitter includes an electron accelerator and a collimator. The electron accelerator is fixedly connected to the first deployment structure, and the collimator is fixedly connected to the output end of the electron accelerator.

[0036] The electron accelerator utilizes electron induction accelerator technology, offering switchable energy levels of 9MeV and 6MeV. It features a compact structure, simple operation, low radiation leakage rate, safe and reliable operation, and stable performance, providing superior penetrating imaging. Its high-energy electron beam possesses strong penetrating power, reaching deep into the complex internal structure of bridges. This overcomes the limitations of conventional non-destructive testing methods, uncovering hidden defects such as micro-cracks and structural changes caused by initial steel corrosion within bridge piers and thick concrete layers of beams. This expands the depth and breadth of detection, providing detailed internal information about the bridge. The collimator regulates and standardizes the newly generated, diverging X-ray beam, constraining its direction, removing scattered clutter, and shaping a regular, directional, and uniformly intense beam that is precisely directed towards the area of ​​the bridge to be inspected.

[0037] In this embodiment, the radiation receiver is a flat panel detector, which includes a scintillator layer, a photoelectric conversion layer, and a thin-film transistor array. The scintillator layer and the photoelectric conversion layer are fixedly connected, and the side of the photoelectric conversion layer facing away from the scintillator layer is fixedly connected to the thin-film transistor array.

[0038] Flat panel detectors feature high resolution, low noise, large dynamic range, and high transmission rate. The scintillator layer, located at the front of the detector, directly faces the X-rays penetrating the bridge. Utilizing its unique physical properties (such as cesium iodide and gadolinium oxysulfide), it cleverly converts high-energy X-ray photons into visible light photons, efficiently completing the X-ray to visible light conversion while preserving the bridge's internal structural information carried by the X-rays. Based on the material's high absorption rate and excellent light output performance, it ensures sensitive and faithful signal conversion, providing a raw and accurate data foundation for subsequent precise analysis and avoiding signal distortion that could lead to the loss of subtle defect features. The photoelectric conversion layer, closely attached to the scintillator layer, converts the visible light photons generated by the scintillator into electrical signals (often using photodiode arrays made of amorphous silicon or other photoelectric conversion materials). Photons excite electron transitions in the material, forming charge accumulation, achieving a fundamental leap from light to electrical signals. With stable and efficient photoelectric conversion performance, it concretizes the abstract light signal into a quantifiable and easily transmitted electrical signal. Its conversion efficiency and response speed determine the overall performance of the flat panel detector, accurately capturing changes in light intensity (corresponding to different attenuation conditions of the bridge structure). The thin-film transistor array is connected to the photoelectric conversion layer. The thin-film transistor units are arranged in rows and columns. The electrical signals of the photoelectric conversion layer are scanned and read row by row and column by column. With the orderly scanning and signal amplification and transmission mechanism, the discrete electrical signals are woven into complete digital image information. The signal quality is controlled, the transmission process is regulated, noise interference and signal crosstalk are reduced, and clear, high-resolution images of the internal structure of the bridge are output, presenting intuitive and visual results to the inspection personnel.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A radiation detection device for internal defects of highway bridges, comprising traction equipment and detection equipment, characterized in that, The traction equipment includes a cab and a rear frame. The cab is fixedly connected to the rear frame. The detection equipment is located on the rear frame and fixedly connected to it. The detection equipment includes a radiation emitting device and a radiation receiving device, both of which are fixedly connected to the rear frame. The radiation emitting device is located on the left side of the traction equipment's forward direction, and the radiation receiving device is located on the right side of the traction equipment's forward direction. The radiation emitting device includes a first deployment structure for deploying a radiation generator and a radiation emitting device. The radiation receiving device includes a second deployment structure for deploying a radiation receiver and a radiation receiver.

2. The radiation detection device for internal defects of highway bridges according to claim 1, characterized in that, The first unfolding structure includes a first rotating base, a first vertical lifting arm, a first rotating disk, and a first telescopic arm. The first rotating base is rotatably connected to the rear frame. The first vertical lifting arm is fixedly connected to the rotating end of the first rotating base. The first rotating disk is rotatably connected to the lifting end of the first vertical lifting arm. The first telescopic arm is fixedly connected to the rotating end of the first rotating disk. A radiation emitter is slidably connected to the first telescopic arm.

3. The radiation detection device for internal defects of highway bridges according to claim 2, characterized in that, The first telescopic arm includes a first main support arm and two first extension arms. The two first extension arms are respectively embedded into the first main support arm from both ends. The first extension arms are slidably connected to the first main support arm. Both the first extension arms and the first main support arm are provided with first slide rails. The first slide rails of the first extension arms overlap with the first slide rails of the first extension arms. One side of the radiation emitter is embedded in the first slide rail and slides along the first slide rail.

4. The radiation detection device for internal defects of highway bridges according to claim 1, characterized in that, The second unfolding structure includes a second rotating base, a second vertical lifting arm, a second rotating disk, a third rotating disk, and a second telescopic arm. The second rotating base is rotatably connected to the rear frame. The second vertical lifting arm is fixedly connected to the rotating end of the second rotating base. The second rotating disk is fixedly connected to the telescopic end of the second vertical lifting arm. The third rotating disk is fixedly connected to the rotating end of the second rotating disk. The second telescopic arm is fixedly connected to the rotating end of the third rotating disk. The third rotating disk and the second rotating disk are perpendicular to each other. A radiation receiver is slidably connected to the second telescopic arm.

5. A radiation detection device for internal defects of highway bridges according to claim 4, characterized in that, The second telescopic arm includes a second main support arm and a second extension arm. One end of the second main support arm is fixedly connected to the rotating end of the third rotating disk. The second extension arm is embedded in the end of the second main support arm that is away from the third rotating disk. The second extension arm is slidably connected to the second main support arm. Both the second main support arm and the second extension arm are provided with a second slide rail. The second slide rail of the second main support arm overlaps with the second slide rail of the second extension arm. One side of the radiation receiver is embedded in the second slide rail and slides along the second slide rail.

6. The radiation detection device for internal defects of highway bridges according to claim 1, characterized in that, The radiation emitter includes an electron accelerator and a collimator. The electron accelerator is fixedly connected to the first deployment structure, and the collimator is fixedly connected to the output end of the electron accelerator.

7. The radiation detection device for internal defects of highway bridges according to claim 1, characterized in that, The radiation receiver is a flat panel detector, which includes a scintillator layer, a photoelectric conversion layer, and a thin-film transistor array. The scintillator layer is fixedly connected to the photoelectric conversion layer, and the side of the photoelectric conversion layer opposite to the scintillator layer is fixedly connected to the thin-film transistor array.

Images