Lightweight road radar detection and video synchronous recording system

Abstract

The utility model belongs to the technical field of road engineering detection, and relates to a light road surface radar detection and video synchronous recording system, which comprises a bearing vehicle, a controller, a radar detection unit, a video synchronous recording unit and a position marking unit, a video synchronous recording unit is installed at the upper position of the front end of the bearing vehicle, and a position marking unit is installed at the lower position of the front end of the bearing vehicle. According to the utility model, the light and portable bearing vehicle is used as a carrier, so that the detection adaptability and flexibility of the radar equipment on limited road sections are effectively improved, and detection dead angles are avoided. The synchronous video acquisition function utilizes synchronous associated images, GPS information and other data to assist in later data analysis and on-site investigation and positioning. The position marking function realizes real-time, accurate and rapid marking of road surface and radar images, ensures the accuracy of radar wave velocity calibration, improves the detection efficiency, reduces the influence on road traffic, and ensures the safety of detection personnel.

Description

Technical Field

[0001] The utility model belongs to the technical field of road engineering detection, in particular to a lightweight road surface radar detection and video synchronous recording system. Background Art

[0002] As a new detection method, geological radar emits high-frequency pulse electromagnetic waves to the pavement structure layer. It uses the dielectric differences of different structural layers and the principle of electromagnetic wave reflection to obtain the physical parameter characteristics of the reflected wave amplitude, spectrum, phase, etc. from different dielectrics in the structural layer below the pavement, analyze the physical characteristics of the dielectric of the pavement structure, obtain the thickness information of the structural layer, and find various diseases in the pavement structure layer.

[0003] Radar detection units are generally divided into hand-push type and vehicle-mounted type. The hand-push type has a simple structure and high flexibility, but is not suitable for long-distance detection. The vehicle-mounted type usually loads the radar detection unit onto a motor vehicle, which drives on the road section to be tested to complete long-distance radar image acquisition. However, in some cases, data collection is limited. For example, on municipal roads, parks, living areas and other roads with narrow roads, short routes, and many roadside parking, the vehicle-mounted radar detection unit cannot play its advantages due to the large size of the carrier vehicle, and may even be unable to perform detection. In highway maintenance projects, the construction surface is mostly single-lane, and traffic is opened immediately after construction is completed. The disconnection detection time is short, and multiple construction machinery cross operations (marking lines, road cleaning, etc.) interfere, making it almost impossible for the motor vehicle-mounted radar detection unit to perform detection.

[0004] Road conditions and surrounding environment are important auxiliary data for radar image interpretation and abnormal cause analysis. The abnormal points initially judged need to be re-inspected and verified on site. Therefore, on-site inspection personnel use spray painting, taking photos, recording videos and other means to mark abnormal locations and record road conditions and surrounding environment information at the measuring points. General image acquisition equipment cannot automatically enter pile numbers or obtain GPS location information. On-site positioning is mainly completed by manually recording pile numbers. When the road line type is complex and there are many measuring points, it is easy to miss shots, confusion between photos and measuring point information, and incomplete information reflected in photos, which makes it difficult to analyze data later. At the same time, due to the lack of GPS location information, when it is necessary to review abnormal points on site, it is impossible to use map navigation to quickly reach the predetermined points. Utility Model Content

[0005] The utility model aims to provide a lightweight road surface radar detection and video synchronous recording system to solve the problems existing in the prior art.

[0006] The utility model solves the technical problem through the following technical solutions:

[0007] A lightweight road surface radar detection and video synchronous recording system, characterized in that it comprises a carrier vehicle, a controller, a radar detection unit, a video synchronous recording unit and a position marking unit, wherein the radar detection unit is installed on the carrier vehicle, the video synchronous recording unit is installed at the upper front end of the carrier vehicle, and the position marking unit is installed at the lower front end of the carrier vehicle;

[0008] The radar detection unit includes a radar host, a radar antenna and a first wheel-mounted encoder. A load-bearing bracket is installed at the front end of the load-bearing vehicle, a radar antenna is installed on the load-bearing bracket, and the first wheel-mounted encoder is installed at the wheel axle of the load-bearing vehicle. The radar antenna and the first wheel-mounted encoder are connected to the radar host and the controller installed on the load-bearing vehicle through a data transmission line.

[0009] The video synchronous recording unit includes a GPS signal receiver, a first camera, a second camera and a second wheel-mounted encoder. The GPS signal receiver and the first camera are installed at the front of the carrier vehicle, the second camera is installed on the carrier bracket, and the second wheel-mounted encoder is installed at the wheel axle of the carrier vehicle. The GPS signal receiver, the first camera, the second camera and the second wheel-mounted encoder are connected to a controller installed on the carrier vehicle through a data transmission line;

[0010] The position marking unit includes a self-spray paint, a self-spray paint bracket, a paint trigger, a radar marking trigger, a paint extension tube, a remote control and a control switch. The self-spray paint bracket is installed at the bottom of the supporting bracket, and the self-spray paint with a nozzle facing downward is installed on the self-spray paint bracket. A paint extension tube arranged to be tilted downward is connected to the nozzle. A radar marking trigger is installed on the supporting bracket, and the radar marking trigger and the paint trigger are respectively connected to the control circuit.

[0011] Moreover, the body of the carrier vehicle is made of aluminum profiles.

[0012] Moreover, a lifting platform is arranged at the rear of the roof of the load-bearing vehicle, and the lifting platform is driven to rise and fall by an electric telescopic rod, and the electric telescopic rod is installed at the four corners of the lifting platform; the controller, remote controller and control switch are installed on the lifting plate.

[0013] Moreover, a trailer is arranged at the rear of the carrier vehicle.

[0014] Moreover, the radar antenna includes a ground-coupled antenna and an air-coupled antenna.

[0015] Moreover, the first wheel-mounted encoder and the second wheel-mounted encoder are connected through a guide mechanism, and the guide mechanism includes a T-shaped guide box, in which a connecting shaft is passed, and the first wheel-mounted encoder and the second wheel-mounted encoder are respectively installed at both ends of the connecting shaft, and a first bevel gear is installed in the T-shaped guide box on the connecting shaft, and the first bevel gear is meshed with a second bevel gear installed on the load-bearing wheel axle.

[0016] Moreover, the radar marking trigger includes a marking trigger mechanism and a marking button. A marking button is arranged on the radar antenna, and a pressure head driven by the marking trigger mechanism is installed at a position corresponding to the marking button on the supporting bracket. The control circuit of the marking trigger mechanism is connected with the remote control and the control switch signal.

[0017] Moreover, the marking trigger mechanism is a steering gear or an electromagnet.

[0018] Moreover, the paint spray trigger includes a paint spray trigger mechanism, a pull rod and a pressure plate. An opening is provided on the pressure plate for exposing the self-spray paint nozzle. One end of the pressure plate is hinged on the self-spray paint bracket, and the other end of the pressure plate is connected to the pull rod. The end of the pull rod is connected to the paint spray trigger mechanism. The paint spray trigger mechanism is installed on the self-spray paint bracket, and the control circuit of the paint spray trigger mechanism is connected to the remote control and the control switch signal.

[0019] Moreover, the paint spraying trigger mechanism is a steering gear or an electromagnet.

[0020] The advantages and beneficial effects of the utility model are:

[0021] This lightweight road radar detection and video synchronous recording system uses a lightweight remote-controlled electric vehicle as a vehicle carrier, which reduces the restrictions on the detection work at the work site and improves the detection adaptability of narrow road sections.

[0022] The radar detection unit is no longer bound to motor vehicles and is no longer subject to traffic restrictions in urban areas, which improves the flexibility and emergency mobility of radar detection equipment.

[0023] At the same time, the installed video synchronization recording unit is used to continuously collect images of road conditions at the measuring points, and the image data is synchronously associated with the radar detection data through the pile number to facilitate subsequent data analysis.

[0024] The position marking unit can mark the road surface and radar images at any time, greatly improving the accuracy and efficiency of detection and ensuring the safety of test personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2It is a structural schematic diagram of the assembly of the first wheel-mounted encoder, the second wheel-mounted encoder and the guide mechanism of the utility model;

[0027] Figure 3 The utility model is a schematic diagram of the structure of the radar marking trigger and the spray paint trigger assembled on the bearing bracket.

[0028] Description of reference numerals:

[0029] 1-controller, 2-remote controller and control switch, 3-lifting platform, 4-carrying vehicle, 5-trailer, 6-battery, 7-radar host, 8-GPS signal receiver, 9-first camera, 10-second camera, 11-radar marking trigger, 12-radar antenna, 13-self-spraying paint, 14-spraying paint trigger, 15-spraying paint extension tube, 16-ground mark, 17-first wheel-mounted encoder, 18-second wheel-mounted encoder, 19-T-shaped guide box, 20-carrying bracket, 21-marking trigger mechanism, 22-pressing head, 23-marking button, 24-pressing plate, 25-pull rod, 26-spraying paint trigger mechanism, 27-control circuit. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not restrictive, and the protection scope of the present invention cannot be limited by them.

[0031] A lightweight road surface radar detection and video synchronous recording system, the innovation of which is that it includes a carrier vehicle 4, a controller 1, a radar detection unit, a video synchronous recording unit and a position marking unit, wherein the radar detection unit is installed on the carrier vehicle, the video synchronous recording unit is installed at the upper front end of the carrier vehicle, and the position marking unit is installed at the lower front end of the carrier vehicle;

[0032] The body of the carrier vehicle is made of aluminum profiles, is small in size and light in weight, and is driven by a motor differentially controlled by a remote controller.

[0033] A lifting platform 3 is arranged at the rear of the roof of the load-bearing vehicle. The lifting platform is driven to rise and fall by an electric telescopic rod, which is installed at the four corners of the lifting platform. The controller, remote controller and control switch are installed on the lifting plate. In order to ensure the light weight and portability of the vehicle, the height of the vehicle body is designed to be low, but it is not conducive to the operation of the controller, remote controller and control switch by the operator. By setting the lifting plate, the height of the controller, remote controller and control switch can be increased, thereby improving the on-site operation performance.

[0034] A trailer 5 is arranged at the rear of the carrier vehicle, which can be used to carry accessories, core samples, etc., and can also carry people when detecting long sections. When detecting underground disease bodies on roads, the trailer can be replaced with a low-frequency antenna of 400MHz to 900MHz.

[0035] This lightweight road radar detection and video synchronous recording system uses a lightweight remote-controlled electric vehicle as a carrier. The overall system is small and flexible, which reduces the restrictions on the work site and improves the detection adaptability of narrow sections. It solves the problem of difficulty in detection of motor vehicle-mounted radar detection systems in some municipal roads, parks, living areas, etc., where the road surface is narrow, the route is short, and there are many roadside parking. Avoid detection blind spots caused by insufficient flexibility of detection equipment and effectively ensure the quality of the project. The radar detection system is no longer bound to motor vehicles and is no longer subject to urban license plate restrictions, which improves the flexibility and emergency mobility of radar detection equipment.

[0036] The radar detection unit includes a radar host 7, a radar antenna 12 and a first wheel-mounted encoder 17. A load-bearing bracket 20 is installed at the front end of the carrier vehicle, and a radar antenna is installed on the load-bearing bracket. A battery 6 is arranged in the carrier vehicle, and the battery supplies power to the entire system. The first wheel-mounted encoder is installed at the axle of the carrier wheel. The radar antenna and the first wheel-mounted encoder are connected to the radar host and the controller installed on the carrier vehicle through a data transmission line.

[0037] The video synchronous recording unit includes a GPS signal receiver 8, a first camera 9, a second camera 10 and a second wheel-mounted encoder 18. The GPS signal receiver and the first camera are installed at the front of the carrier vehicle, the second camera is installed on the carrier bracket, and the second wheel-mounted encoder is installed at the wheel axle of the carrier vehicle. The GPS signal receiver, the first camera, the second camera and the second wheel-mounted encoder are connected to the controller installed on the carrier vehicle through a data transmission line;

[0038] The first wheel-mounted encoder and the second wheel-mounted encoder are connected through a guide mechanism, and the guide mechanism includes a T-shaped guide box 19, a connecting shaft is installed in the T-shaped guide box, and the first wheel-mounted encoder and the second wheel-mounted encoder are installed at both ends of the connecting shaft, respectively. A first bevel gear is installed in the T-shaped guide box on the connecting shaft, and the first bevel gear is meshed with the second bevel gear installed on the wheel axle of the load-bearing wheel. The T-shaped guide box converts the wheel axle angle into lateral outputs at a ratio of 1:1. The first wheel-mounted encoder is connected to one side of the lateral output shaft of the T-shaped guide box to provide distance or pile number information for the radar host. The radar antenna is an air-coupled antenna, and the first wheel-mounted encoder is a photoelectric rotary encoder. The second wheel-mounted encoder is connected to the other side of the lateral output shaft of the T-shaped guide box to provide distance or pile number information for the controller and serve as a command trigger for controller data acquisition. The controller synchronously associates GPS information with camera images and pile numbers to assist radar image interpretation and abnormal point positioning.

[0039] The video synchronous recording device will collect the road surface images and GPS data of the test section and associate them with the radar data through the stake number. Combined with the preliminary interpretation results of the indoor radar image, the on-site photos of the abnormal position can be quickly located for auxiliary analysis, and GPS information can be extracted to reach the abnormal position by navigation for on-site inspection. Finally, the abnormal information will be marked on the map for easy presentation of the attached report.

[0040] The position marking unit includes a self-spray paint 13, a self-spray paint bracket, a paint trigger 14, a radar marking trigger 11, a paint extension tube 15, a remote control and a control switch 2. The self-spray paint bracket is installed at the bottom of the supporting bracket, and the self-spray paint with a nozzle facing downward is installed on the self-spray paint bracket. A paint extension tube arranged to be tilted downward is connected to the nozzle. A radar marking trigger is installed on the supporting bracket, and the radar marking trigger and the paint trigger are respectively connected to the control circuit.

[0041] The radar marking trigger includes a marking trigger mechanism 21 and a marking button 23. A marking button is provided on the radar antenna, and a pressure head 22 driven by the marking trigger mechanism is installed at a position corresponding to the marking button on the supporting bracket. The control circuit 27 of the marking trigger mechanism is connected to the remote control and the control switch signal.

[0042] The paint trigger includes a paint trigger mechanism 26, a pull rod 25 and a pressure plate 24. An opening is provided on the pressure plate for exposing the self-spray paint nozzle. One end of the pressure plate is hinged on the self-spray paint bracket, and the other end of the pressure plate is connected to the pull rod. The end of the pull rod is connected to the paint trigger mechanism. The paint trigger mechanism is installed on the self-spray paint bracket. The control circuit 27 of the paint trigger mechanism is connected to the remote control and the control switch signal.

[0043] The paint spraying trigger mechanism and the marking trigger mechanism are both driven by a steering gear or an electromagnet.

[0044] The paint trigger and the radar marking trigger share a set of control circuits and signals, and are started and stopped synchronously by the remote control and the control switch. The remote control and the control switch send signals to the control circuit of the paint trigger, and the servo or electromagnet drives the pressure plate through the pull rod to squeeze the paint liquid from the paint nozzle to the ground, forming a ground mark 16.

[0045] The remote control and control switch send signals to the control circuit of the radar marking trigger, and the servo or electromagnet drives the pressure head to press the marking button on the radar antenna to make an electronic mark on the radar scanning image.

[0046] The position marking unit can realize the synchronous marking of road targets and radar images at any time, accurately and quickly, ensuring the accuracy of radar wave velocity calibration, improving detection efficiency, ensuring the safety of detection personnel, shortening the time of parking on the road, and reducing the impact on normal road traffic.

[0047] The implementation process of the utility model is:

[0048] 1. Preparation

[0049] (1) Install the radar detection unit, connect the power supply, start the radar host to preheat, and set the acquisition parameters;

[0050] (2) Connect the video synchronization recording unit to check the angle and image quality of the first camera and the second camera;

[0051] (3) After the self-spray paint is shaken well, install it in the self-spray paint bracket, connect the spray paint trigger and the radar marking trigger, and press the marking remote control to conduct a test spray inspection;

[0052] (4) Start the video acquisition function in the controller;

[0053] (5) Turn on the radar collection function, and use the remote control and control switch to control the carrier vehicle to the front of the starting point to complete automatic gain;

[0054] (6) Test data collection and check the coordination of each unit.

[0055] 2. Detection process

[0056] (1) Maneuver the carrier vehicle to align with the test starting point;

[0057] (2) The road surface structure is scanned by radar along each measuring line, and the video synchronous recording unit collects GPS information and records the road surface and surrounding environment conditions;

[0058] (3) When used to detect the thickness of the asphalt surface layer, wave velocity calibration is required. Slow down in advance when arriving near the predetermined calibration point. After checking that the radar image quality is qualified, press the mark button of the remote control and control switch. At the same time, the spray paint trigger and radar marking trigger work to form ground marks and radar image electronic marks. Drill a core sample of the pavement structure layer at the ground mark position, measure the thickness of the core sample, and complete the wave velocity calibration in combination with the two-way travel time of the radar wave at the electronic mark position;

[0059] When used to detect underground disease bodies, the suspicious disease locations on the road surface can be quickly marked by pressing the mark button of the remote control and control switch according to the real-time judgment results of the radar scanning image, which is convenient for later on-site inspection and positioning;

[0060] (4) Fill in the original records after completing each survey line;

[0061] (5) After all the radar data of the survey line is collected, save the data and shut down the entire detection system.

[0062] (6) Analyze radar images indoors and record suspicious locations. Retrieve images of corresponding stake numbers to assist in radar image interpretation and infer the cause of the anomaly;

[0063] (7) Export GPS information of abnormal points. When on-site verification is required, use GPS to navigate to the abnormal points for on-site inspection and verification.

[0064] 3. Test results

[0065] The detection results of the pavement structure layer thickness or structure layer condition; the list of abnormal points and map markings, including the abnormal point type, pile number location, GPS information, abnormal cause, field inspection results, etc.

[0066] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A lightweight road radar detection and video synchronous recording system, characterized in that: It includes a carrier vehicle, a controller, a radar detection unit, a video synchronization recording unit and a position marking unit. The radar detection unit is installed on the carrier vehicle, the video synchronization recording unit is installed at the upper front end of the carrier vehicle, and the position marking unit is installed at the lower front end of the carrier vehicle. The radar detection unit includes a radar host, a radar antenna and a first wheel-mounted encoder. A load-bearing bracket is installed at the front end of the load-bearing vehicle, a radar antenna is installed on the load-bearing bracket, and the first wheel-mounted encoder is installed at the wheel axle of the load-bearing vehicle. The radar antenna and the first wheel-mounted encoder are connected to the radar host and the controller installed on the load-bearing vehicle through a data transmission line. The video synchronous recording unit includes a GPS signal receiver, a first camera, a second camera and a second wheel-mounted encoder. The GPS signal receiver and the first camera are installed at the front of the carrier vehicle, the second camera is installed on the carrier bracket, and the second wheel-mounted encoder is installed at the wheel axle of the carrier vehicle. The GPS signal receiver, the first camera, the second camera and the second wheel-mounted encoder are connected to a controller installed on the carrier vehicle through a data transmission line; The position marking unit includes a self-spray paint, a self-spray paint bracket, a paint trigger, a radar marking trigger, a paint extension tube, a remote control and a control switch. The self-spray paint bracket is installed at the bottom of the supporting bracket, and the self-spray paint with a nozzle facing downward is installed on the self-spray paint bracket. A paint extension tube arranged to be tilted downward is connected to the nozzle. A radar marking trigger is installed on the supporting bracket, and the radar marking trigger and the paint trigger are respectively connected to the control circuit.

2. The portable road radar detection and video synchronous recording system according to claim 1, characterized in that: The body of the carrier vehicle is made of aluminum profiles.

3. The portable road radar detection and video synchronous recording system according to claim 1, characterized in that: A lifting platform is arranged at the rear of the roof of the load-bearing vehicle. The lifting platform is driven to rise and fall by an electric telescopic rod, which is installed at the four corners of the lifting platform. The controller, remote controller and control switch are installed on the lifting platform.

4. The portable road radar detection and video synchronous recording system according to claim 1, characterized in that: A trailer is arranged at the rear of the carrier vehicle.

5. The portable road radar detection and video synchronous recording system according to claim 1, characterized in that: The radar antenna comprises a ground coupling antenna and an air coupling antenna.

6. The portable road radar detection and video synchronous recording system according to claim 1, characterized in that: The first wheel-mounted encoder and the second wheel-mounted encoder are connected through a guide mechanism, and the guide mechanism includes a T-shaped guide box, a connecting shaft is installed in the T-shaped guide box, and the first wheel-mounted encoder and the second wheel-mounted encoder are respectively installed at both ends of the connecting shaft. A first bevel gear is installed in the T-shaped guide box on the connecting shaft, and the first bevel gear is meshed with a second bevel gear installed on the load-bearing wheel axle.

7. The portable road radar detection and video synchronous recording system according to claim 1, characterized in that: The radar marking trigger includes a marking trigger mechanism and a marking button. The marking button is arranged on the radar antenna, and a pressure head driven by the marking trigger mechanism is installed at a position corresponding to the marking button on the supporting bracket. The control circuit of the marking trigger mechanism is connected with the remote control and the control switch signal.

8. The portable road radar detection and video synchronous recording system according to claim 7, characterized in that: The marking trigger mechanism is a steering gear or an electromagnet.

9. The portable road radar detection and video synchronous recording system according to claim 1, characterized in that: The paint spray trigger includes a paint spray trigger mechanism, a pull rod and a pressure plate. An opening is provided on the pressure plate for exposing the self-spray paint nozzle. One end of the pressure plate is hinged on the self-spray paint bracket, and the other end of the pressure plate is connected to the pull rod. The end of the pull rod is connected to the paint spray trigger mechanism. The paint spray trigger mechanism is installed on the self-spray paint bracket, and the control circuit of the paint spray trigger mechanism is connected to the remote control and the control switch signal.

10. A lightweight road radar detection and video synchronous recording system according to claim 9, characterized in that: The paint spraying trigger mechanism is a steering gear or an electromagnet.

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