Pavement disease detection equipment

Abstract

The utility model relates to the technical field of road quality detection equipment, and discloses pavement disease detection equipment, a vehicle-mounted detection device is arranged at the top of a bearing vehicle, an image acquisition module comprises an adjustable bracket and a plurality of cameras, and the adjustable bracket comprises a horizontal telescopic bracket, a liftable bracket and a horizontal telescopic bracket track; the bottom of the horizontal telescopic support is slidably connected with the top end of the horizontal telescopic support rail through a sliding rail structure. The lifting support is connected with a stand column at the bottom end of the horizontal telescopic support rail through a lead screw transmission device. The horizontal telescopic bracket and the liftable bracket are respectively driven by a motor; a plurality of cameras are mounted at the bottom of the tail end of the horizontal telescopic bracket; the lifting support is fixed to the top of a bearing vehicle through a suction cup type fixator. The edge processing module is connected with the image acquisition module; the communication module is electrically connected with the image acquisition module and the edge processing module. The device does not damage the vehicle, adapts to different vehicle types, is convenient to adjust the focal length, and quickly responds to environmental changes.

Description

Technical Field

[0001] This utility model relates to the technical field of road quality testing equipment, and in particular to a road surface defect testing device. Background Technology

[0002] There are two main methods for collecting road surface damage images: The first method involves acquiring images through oblique photography or vehicle-mounted cameras, such as those recorded by dashcams and smartphones. However, these images often have more complex backgrounds, making traditional image processing methods and machine learning algorithms unsuitable for direct application. The second method uses cameras perpendicular to the road surface, such as drones or fixed vertical cameras. However, the second method has certain limitations in practical use.

[0003] (1) Road inspection often requires long-term and long-distance monitoring, and the image acquisition method of drones is difficult to meet the needs in actual operation. In addition, fixed road vertical cameras usually need to be installed on the horizontal bracket at the rear of the vehicle. The traditional horizontal bracket is connected to the vehicle frame by bolts. This installation method often requires drilling and modification of the vehicle, which not only extends the length of the vehicle body, but also causes a certain degree of damage to the vehicle body structure.

[0004] (2) Traditional road vertical cameras cannot be moved up and down to adjust the focus because they are fixed on a bracket, which affects the clarity of the acquired images. In addition, when a vehicle in the detection state passes through a height-restricted area, the vehicle will be restricted by vertical space.

[0005] (3) Traditional road inspection vehicles are typically equipped with specialized equipment such as 3D ground-penetrating radar, high-precision positioning sensors, and high-precision industrial cameras. While their inspection accuracy is high, their inspection speed is relatively slow. These vehicles usually employ a complex multi-functional structural design. To accommodate the aforementioned inspection equipment, the vehicle body needs to be customized and reinforced, including multiple functional areas such as equipment installation modules, data processing centers, and power supply modules. Although this structural design can meet the requirements for high-precision data acquisition, the vehicle is large in size, complex to operate, and requires a certain amount of road space during actual inspection operations. Due to the slow inspection speed, these vehicles often cannot coordinate with normal traffic flow during operation, which may lead to traffic congestion and even require the temporary closure of some road sections to ensure safety. At the same time, this operating method not only increases social costs but also causes great inconvenience to public transportation systems and road users, and even poses potential safety risks.

[0006] (4) Most road vertical cameras have limited coverage and can usually only capture road defects in one direction and one lane. This limitation means that in actual operation, multiple shots are required to cover the entire road surface, resulting in low data collection efficiency. Utility Model Content

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a road surface defect detection device that solves the problem of limited image acquisition perpendicular to the road surface. The aim of this invention is to make the device adaptable to different vehicle models, facilitate focal length adjustment, and ensure that the vehicle-mounted detection device can quickly respond to environmental changes while the vehicle is moving.

[0008] The solution adopted in this utility model is as follows:

[0009] A road surface defect detection device, characterized in that it includes a carrier vehicle and an on-board detection device; the on-board detection device is placed on top of the carrier vehicle and includes:

[0010] The image acquisition module includes an adjustable bracket and multiple cameras. The adjustable bracket includes a horizontal telescopic bracket, a height-adjustable bracket, and a horizontal telescopic bracket track. The bottom of the horizontal telescopic bracket is slidably connected to the top of the horizontal telescopic bracket track via a slide rail structure. The height-adjustable bracket is connected to a column at the bottom of the horizontal telescopic bracket track via a screw drive device. The horizontal telescopic bracket and the height-adjustable bracket are each driven by a motor. The multiple cameras are installed at the bottom of the end of the horizontal telescopic bracket. The height-adjustable bracket is fixed to the top of the vehicle using a suction cup holder.

[0011] The edge processing module is connected to the image acquisition module;

[0012] The communication module is electrically connected to the image acquisition module and the edge processing module, respectively; both the communication module and the edge processing module are located at the rear of the vehicle.

[0013] Furthermore, the horizontal telescopic support track is a rectangular frame, with sliding tracks installed at the top of the two parallel sides on the same side as the vehicle door.

[0014] Furthermore, the horizontal telescopic support is composed of a rectangular frame made of multiple metal rods; the slide rail structure includes rolling wheels, a synchronous belt and a horizontal motor; the rolling wheels are embedded in the slide rail, and the horizontal motor drives the horizontal telescopic support to move on the slide rail of the horizontal telescopic support track, thereby realizing the telescopic movement of the horizontal telescopic support.

[0015] Furthermore, one end of the synchronous belt is connected to a horizontal motor, and the other end is fitted with a rolling wheel; the horizontal motor is installed at the end of the horizontal telescopic support track and is arranged parallel to the sliding track.

[0016] Furthermore, the liftable support is composed of vertically parallel metal rods distributed at the four corners of the rectangular frame of the horizontal telescopic support track; the screw drive device includes a screw, a nut, and a vertical motor; the screw is connected to the vertical motor, the nut is sleeved on the screw, the nut is connected to the liftable support, and the vertical motor is installed at the bottom of the liftable support; the vertical motor drives the liftable support to move on the column at the bottom end of the horizontal telescopic support track.

[0017] Furthermore, the cross-sectional dimension of the metal rod constituting the liftable support is larger than that of the column at the bottom of the horizontal telescopic support track, and it is sleeved on the outside of the column.

[0018] Furthermore, each camera is independently mounted on a dual-axis servo gimbal and supported by a three-piece longitudinal bracket.

[0019] Furthermore, the edge processing module includes an embedded controller; the embedded controller is connected to the camera, motor, and dual-axis servo gimbal via cables, and sends task commands to drive the camera, motor, and dual-axis servo gimbal to perform specific actions.

[0020] Furthermore, the cable is laid through a channel reserved inside the horizontal telescopic bracket.

[0021] Furthermore, the suction cup holder is installed at the bottom of the liftable bracket and adopts a snap-on quick-release design; the suction cup holder includes an electric vacuum pump and a pressure sensor to monitor the suction cup's adsorption status in real time and apply pressure.

[0022] The beneficial effects of this utility model are as follows:

[0023] This utility model's adjustable bracket can be raised, lowered, and moved horizontally. The horizontal movement of the bracket ensures that it does not interfere with normal traffic during operation. The raising and lowering of the bracket allows for focus adjustment when acquiring ground images, facilitating adjustments to the viewing angle, depth of field, and magnification, thus ensuring image clarity. Furthermore, vehicles in the detection state are not restricted by vertical space when passing through height-restricted areas.

[0024] This invention connects to the roofs of various types of ordinary vehicles using a vacuum suction cup fastener. No special vehicles or vehicle modifications are required, and the vehicle roof will not be damaged. This significantly reduces hardware investment costs. The adjustable bracket and suction cup fastener support quick disassembly and installation, allowing for flexible switching between different vehicles and facilitating maintenance and use.

[0025] This utility model's multi-camera combination design, in collaboration with an embedded controller, a liftable bracket, and a dual-axis servo gimbal, enables dynamic adjustment of ground clearance, pitch angle, and yaw angle. It supports simultaneous detection of multiple lanes in a single operation, ensuring the integrity and high quality of the acquired images and reducing time costs.

[0026] This invention utilizes photoelectric sensors or Hall sensors in conjunction with an embedded controller, motor, and adjustable bracket to monitor the equipment status in real time. The position of the adjustable bracket can be adjusted at any time, enhancing the equipment's adaptability to complex road conditions.

[0027] Advantages of the present invention in additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0029] Figure 1 This is a top view of the vehicle-mounted detection device in an embodiment of this utility model;

[0030] Figure 2 This is a side view of the vehicle-mounted detection device in an embodiment of this utility model;

[0031] Figure 3 This describes the connection details of the slide rail structure in an embodiment of this utility model.

[0032] Among them, 1-camera; 2-horizontal telescopic bracket; 3-horizontal telescopic bracket track; 31-column; 4-liftable bracket; 5-suction cup type fixture; 6-horizontal motor; 7-vertical motor. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this utility model.

[0035] A road surface defect detection device, comprising:

[0036] The image acquisition module includes an adjustable bracket and multiple cameras 1. The adjustable bracket includes a horizontal telescopic bracket 2, a liftable bracket 4, and a horizontal telescopic bracket track 3. The horizontal telescopic bracket 2 and the liftable bracket 4 are driven by motors respectively. The multiple cameras 1 are installed at the bottom of the end of the horizontal telescopic bracket 2. The liftable bracket 4 is fixed to the top of the carrying vehicle by a suction cup type fixture 5.

[0037] The edge processing module is connected to the image acquisition module;

[0038] The communication module is electrically connected to the image acquisition module and the edge processing module, respectively; both the communication module and the edge processing module are located at the rear of the vehicle.

[0039] Specifically, the horizontal telescopic support track 3 is a rectangular frame, with sliding tracks installed at the top of the two parallel sides on the same side as the vehicle door.

[0040] Specifically, the horizontal telescopic support 2 is a rectangular frame composed of multiple metal rods, and its bottom is slidably connected to the top of the horizontal telescopic support track 3 through a slide rail structure.

[0041] like Figure 3 As shown, specifically: the slide rail structure includes a rolling wheel, a synchronous belt, and a horizontal motor 6; one end of the synchronous belt is connected to the horizontal motor 6, and the other end is fitted with the rolling wheel; the horizontal motor 6 is installed at the end of the horizontal telescopic support track 3, arranged parallel to the slide rail to avoid occupying extra space. The rolling wheel is embedded in the slide rail, and the horizontal telescopic support 2 is driven by the horizontal motor 6 through the synchronous belt to move the rolling wheel on the slide rail of the horizontal telescopic support track 3, thereby realizing the telescopic movement of the horizontal telescopic support.

[0042] Specifically, the liftable support 4 consists of several vertically parallel metal rods distributed at the four corners of the rectangular frame of the horizontal telescopic support track 3. The cross-sectional dimension of the liftable support 4 is larger than that of the bottom column 31 of the horizontal telescopic support track 3, and it is sleeved on the outside of the column 31. It is connected to the bottom column 31 of the horizontal telescopic support track 3 via a screw drive device. The screw drive device drives the liftable support 4 to move on the bottom column 31 of the horizontal telescopic support track 3 by converting the rotational motion of the vertical motor 7 into linear motion.

[0043] Specifically: The lead screw drive includes a lead screw, a nut (not shown in the figure), and a vertical motor 7; the lead screw is connected to the output shaft of the vertical motor 7, and the nut is fitted onto the lead screw, with balls (or other rolling elements) provided between them; the nut is connected to the liftable bracket 4. The vertical motor 7 is located at the bottom of the liftable bracket 4. When the vertical motor 7 rotates, it drives the lead screw to rotate synchronously; when the lead screw rotates, the balls roll in the helical groove between the lead screw and the nut, thereby converting the rotational motion of the lead screw into the linear motion of the nut, which in turn drives the lifting bracket 4 to rise and fall.

[0044] In this embodiment, the frame is made of lightweight and high-strength aluminum alloy, possessing excellent resistance to deformation. The frame design offers flexibility, allowing for fine-tuning of its height to accommodate different vehicle roof shapes, ensuring the equipment remains level and maintains good overall stability after installation. The slide rail structure and screw drive mechanism enable smooth and precise linear motion, improving the system's reliability and accuracy.

[0045] In this embodiment, the horizontal motor is a servo motor; the vertical motor is a linear lead screw stepper motor.

[0046] Precise adjustment of the camera's extension length is achieved through motor control. The servo motors used are models with position and torque feedback (such as industrial-grade DC or stepper servos) to ensure accurate positioning even during high-speed travel or vibration environments. The servo motors offer the advantages of high-speed response and high control precision, making the height adjustment process both smooth and rapid. They also allow for flexible switching between various height states based on external commands, meeting the requirements of different operating scenarios. This design not only enhances the system's automation level but also provides technical support for achieving dynamic height control.

[0047] Specifically, each camera 1 is independently mounted on a dual-axis servo gimbal and supported by a three-position longitudinal bracket (not shown in the figure). The dual-axis servo gimbal can receive adjustment commands from the edge processing module to adjust the camera's pitch and yaw angles, enabling multi-lane shooting. Supporting the cameras with the three-position longitudinal bracket enhances the overall rigidity and stability.

[0048] In this embodiment, at least three high-resolution industrial cameras are installed. The pixel level of each camera can be selected according to the detection requirements (e.g., 2 million to 8 million pixels), and low-light imaging technology is supported to adapt to nighttime detection or poorly lit road environments. The three-piece longitudinal support is made of aluminum alloy profile, which has the characteristics of high strength and lightweight, significantly reducing the overall weight of the equipment and reducing vehicle load. The cameras can be powered by independent lines to avoid interference from other modules that could cause unstable image acquisition.

[0049] Specifically, the edge processing module includes an embedded controller; the embedded controller is connected to the camera, motor, and dual-axis servo gimbal via cables, receives task commands and drives the camera, motor, and dual-axis servo gimbal to perform specific actions; the cables are laid through a pre-reserved channel inside the horizontal telescopic bracket to reduce exposure and lower the risk of mechanical collision.

[0050] In this embodiment, camera 1 is connected to the embedded controller via a high-speed data cable (GigE Ethernet, USB 3.0, or MIP1 interface) to send image acquisition commands to camera 1, ensuring the real-time performance and integrity of image acquisition. The motor is connected to the embedded controller via a serial bus (CAN bus or RS485) to send bracket drive control commands to the motor. The dual-axis servo gimbal is connected to the embedded controller via DuPont wires to send angle adjustment commands to the dual-axis servo gimbal.

[0051] In this embodiment, the adjustable bracket also integrates a photoelectric sensor and a Hall sensor (not shown in the figure), which are electrically connected to the embedded controller to obtain the current length, position and motion status of the horizontal telescopic bracket 2 and the liftable bracket 4 and transmit the data to the embedded controller.

[0052] Specifically, the edge processing module uses high-performance embedded hardware as its core processing platform, tightly integrated with the embedded controller. In this embodiment, the NVIDIA Jetson Xavier NX is selected, which has functions such as local image processing, disease identification, and location recording. It is equipped with a solid-state drive (SSD) of a certain capacity, exceeding 1TB, to store real-time acquired image data and detection results, meeting the needs of continuous detection for a full day or multiple days. It runs on an embedded Linux operating system, ensuring good compatibility with hardware such as cameras, motors, and dual-axis servo gimbals.

[0053] The local image processing, disease identification, and location recording functions are all implemented using existing methods.

[0054] Specifically, the suction cup holder 5 is installed at the bottom of the liftable bracket 4 and adopts a snap-on quick-release design; the suction cup holder 5 includes an electric vacuum pump to enhance the suction force and a built-in pressure sensor to monitor the suction status of the suction cup holder 5 in real time.

[0055] In this embodiment, the suction cup holder is made of high-strength rubber material. A pressure sensor is electrically connected to the embedded controller; when insufficient suction is detected, the system automatically issues an alarm or starts the vacuum pump to repressurize, ensuring the device remains secure and stable at all times.

[0056] For different types of vehicles, the adjustable support can be adjusted to fit the top of different vehicles, ensuring that the horizontal telescopic support is always parallel to the ground.

[0057] The snap-on quick-release design makes installation and disassembly more efficient. Typically, the entire installation or disassembly process can be completed within minutes, greatly improving the equipment's flexibility in switching between different vehicles and facilitating routine maintenance. This design balances reliability, convenience, and adaptability, meeting the needs of various usage scenarios.

[0058] In this embodiment, the communication module is a 5G or Wi-Fi communication module equipped on the vehicle, including a wireless communication chip and a security chip, to ensure normal communication in long-distance or remote environments. Data is transmitted using TCP / IP or MQTT protocols, and data encryption (such as TLS / SSL) can be enabled to protect privacy and security.

[0059] In this embodiment, the detection process of the road surface defect detection equipment is as follows:

[0060] After startup, the road surface defect detection equipment, based on the preset detection route and task requirements, uses an embedded controller to control the horizontal and vertical motors to drive the movement of the horizontal telescopic support and the liftable support. It also controls the camera and dual-axis servo gimbal, enabling the camera to automatically adjust its pitch and yaw angles for multi-lane road surface imaging. The acquired image data is transmitted via high-speed data cables to the edge processing module. This module, equipped with high-performance embedded hardware, processes the images in real time, using existing image recognition algorithms to analyze road conditions and identify defects such as cracks and potholes. The identified defect information, along with the image data, is recorded and stored on a large-capacity solid-state drive. Simultaneously, the communication module ensures data timeliness and security. Throughout the detection process, sensors on the support monitor and provide feedback on the support's position and movement status in real time. The embedded controller dynamically adjusts the equipment position based on this feedback, ensuring the accuracy and stability of the detection. Furthermore, the road surface defect detection equipment is designed for quick assembly and disassembly, protection of vehicles from damage, and adaptability to different vehicles. It employs suction cup-type fasteners mounted on the liftable support, allowing the equipment to flexibly switch between multiple vehicles, improving its efficiency and convenience.

[0061] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A road surface defect detection device, characterized in that, The application relates to a vehicle-mounted detection device and a bearing vehicle comprising the vehicle-mounted detection device. The vehicle-mounted detection device is arranged on the top of the bearing vehicle and comprises: An image acquisition module, which comprises an adjustable support and a plurality of cameras, the adjustable support comprising a horizontal telescopic support, a liftable support and a horizontal telescopic support track; the bottom of the horizontal telescopic support is slidably connected to the top end of the horizontal telescopic support track through a sliding rail structure, and the liftable support is connected to the stand at the bottom end of the horizontal telescopic support track through a screw rod transmission device; the horizontal telescopic support and the liftable support are respectively driven by motors; the plurality of cameras are installed at the bottom of the end of the horizontal telescopic support; the liftable support is fixed to the top of the bearing vehicle through a suction cup type fixator; An edge processing module connected to the image acquisition module; A communication module electrically connected to the image acquisition module and the edge processing module; the communication module and the edge processing module are arranged at the tail of the bearing vehicle.

2. A road surface defect detection apparatus according to claim 1, wherein The horizontal telescopic support track is a rectangular frame, and the top end of the two parallel sides on the same side of the vehicle door of the bearing vehicle is provided with a sliding rail.

3. A road surface defect detection apparatus according to claim 2, wherein The horizontal telescopic support is composed of a plurality of metal rods into a rectangular frame; the sliding rail structure comprises rolling wheels, a synchronous belt and a horizontal motor; the rolling wheels are embedded in the sliding rail, the horizontal motor drives the horizontal telescopic support to move on the sliding rail of the horizontal telescopic support track, and the telescopic function of the horizontal telescopic support is realized.

4. A road surface defect detection apparatus according to claim 3, wherein One end of the synchronous belt is connected to the horizontal motor, and the other end is sleeved with the rolling wheel; the horizontal motor is installed at the end of the horizontal telescopic support track and is arranged in parallel with the sliding rail.

5. The road surface disease detection apparatus of claim 1, wherein The liftable support is composed of metal rods arranged in parallel in the vertical direction and distributed at the four corners of the rectangular frame of the horizontal telescopic support track; the screw rod transmission device comprises a screw rod, a nut and a vertical motor; the screw rod is connected to the vertical motor, the nut is sleeved on the screw rod, the nut is connected to the liftable support, and the vertical motor is installed at the bottom of the liftable support; the vertical motor drives the liftable support to move on the stand at the bottom end of the horizontal telescopic support track.

6. A road surface defect detection device according to claim 5, wherein The cross-sectional dimension of the metal rod constituting the liftable support is larger than that of the stand at the bottom end of the horizontal telescopic support track and is sleeved outside the stand.

7. The road surface defect detection apparatus according to claim 1, wherein Each camera is independently installed on a double-shaft servo motor holder and is supported by a three-pin vertical support.

8. A road surface defect detection apparatus according to claim 7, wherein The edge processing module comprises an embedded controller; the embedded controller is connected to the cameras, the motors and the double-shaft servo motor holder through a cable and sends a task instruction to drive the cameras, the motors and the double-shaft servo motor holder to perform specific actions.

9. A road surface defect detection apparatus according to claim 8, wherein The cable is arranged through a channel reserved in the horizontal telescopic support.

10. The pavement distress detection device of claim 1, wherein, The suction cup type fixator is installed at the bottom of the liftable support and adopts a buckle type quick disassembly and assembly design; the suction cup type fixator comprises an electric vacuum pump and a pressure sensor, which can monitor the adsorption state of the suction cup in real time and increase the pressure.

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