Motor vehicle safety distance snapshot system detection device and method

Abstract

The invention discloses a motor vehicle safety distance snapshot system detection device and method, and the method comprises the steps: a standard test system and a display screen are installed on a target vehicle, the standard test system detects the vehicle distance d between the target vehicle and a front measurement device in real time, and a detection result is displayed on the display screen in real time; the target vehicle passes through the snapshot system along with the front vehicle, the snapshot system snapshots the target vehicle, the display screen is shot by the snapshot system at the same time, and the vehicle distance D detected by the snapshot system is obtained; and comparing the vehicle distance D detected by the snapshot system with the vehicle distance d displayed on the display screen, and judging whether the distance measurement of the snapshot system is accurate or not. Effective detection of speed measurement and distance measurement of the snapshot system can be conveniently and accurately realized.

Description

Technical Field

[0001] The present invention relates to the field of metrology and verification, and in particular to a detection device and method for a motor vehicle safety distance capture system. Background Art

[0002] The motor vehicle safety distance capture system is installed on the road to detect and capture motor vehicles traveling in the same lane when the rear vehicle does not maintain a safe distance from the front vehicle sufficient to take emergency braking measures. The capture system is generally composed of a distance measurement section (which may include vehicle distance confirmation markings, signs, etc.), a speed measurement unit, a distance measurement unit, an image or video acquisition unit, data storage and software, etc. According to the distance measurement principle, it is generally divided into two types. One is to use the marking distance measurement method. On the same driving road, multiple groups of vehicle distance confirmation markings are set. Starting from the confirmation base point 0m (corresponding to the 0m vehicle distance confirmation sign on one side of the road), a marking is set every 5m, and two markings are set in a group. Each group is separated by 50m to form a distance measurement section. When the target vehicle is about to enter the distance measurement interval, the speed measurement unit measures its speed in real time, and the image or video acquisition unit determines whether there is a preceding vehicle in the same lane. When there is a preceding vehicle and the target vehicle passes through the distance confirmation marking, the system takes a photo of it, and calculates whether the distance between the two vehicles is less than 50m or 100m by analyzing the positions of the two vehicles and the markings in the image, and then determines whether the target vehicle is illegal based on the measured speed. Another method is to use direct distance measurement, using millimeter waves or laser radar, or other methods, to directly measure the speed of the target vehicle and the distance to the preceding vehicle in the same lane without relying on the distance confirmation marking to determine whether it is illegal. At present, the accuracy test of the first marking distance measurement method is to measure whether the spacing of the ground markings meets the standard on site. As long as the spacing of the ground markings meets the standard, the capture system is judged to be accurate if the distance between the rear vehicle and the front vehicle is outside the two ground markings after the capture. For the second direct distance measurement method, there is no effective detection method. Only a standard distance measurement system can be installed where the capture camera is installed. The standard distance measurement system and the capture system measure distance and take pictures at the same time, and then compare and calibrate. However, there are defects: the standard distance measurement system itself is difficult to calibrate, and it is time-consuming and laborious to install a standard distance measurement system on public roads. In serious cases, the road needs to be closed, which affects public transportation and is very inconvenient. Therefore, the current detection of these two capture systems is not accurate. Summary of the invention

[0003] The purpose of the present invention is to provide a detection device and method for a motor vehicle safety distance capture system, which can conveniently and accurately realize effective detection of speed and distance measurement of the capture system.

[0004] A motor vehicle safety distance capture system detection method comprises: installing a standard test system and a display screen on a target vehicle, the standard test system detecting the distance d between the target vehicle and the front vehicle in real time, and displaying the detection result on the display screen in real time; the target vehicle follows the front vehicle through the capture system, the capture system captures the target vehicle and the display screen is photographed by the capture system at the same time, and the vehicle distance D detected by the capture system is obtained; comparing the vehicle distance D detected by the capture system with the vehicle distance d displayed on the display screen, and judging whether the distance measurement of the capture system is accurate.

[0005] In one of the embodiments, the vehicle distance D detected by the capture system is compared with the vehicle distance d displayed on the display screen to calibrate the distance measurement function of the capture system.

[0006] In one of the embodiments, the standard test system detects the speed h of the target vehicle in real time, and displays the detection result on the display screen in real time; when the target vehicle passes through the capture system, the capture system captures the target vehicle and the display screen is captured by the capture system at the same time, and the speed H detected by the capture system is obtained; the speed H detected by the capture system is compared with the speed h displayed on the display screen to determine whether the speed measurement of the capture system is accurate.

[0007] In one of the embodiments, the vehicle speed H detected by the capture system is compared with the vehicle speed h displayed on the display screen to calibrate the speed measurement function of the capture system.

[0008] A motor vehicle safety distance capture system detection device, used to implement any of the methods described above, includes a standard test system and a display screen, the standard test system is electrically connected to the display screen, the display screen is installed on the target vehicle, and the display screen is located at a position where it can be photographed by the capture system.

[0009] In one embodiment, the standard test system includes a test host and a distance sensor, and the test host and the distance sensor are electrically connected.

[0010] In one of the embodiments, the distance sensor is a millimeter wave radar.

[0011] In one embodiment, a motor vehicle safety distance capture system detection device also includes a test mounting frame, which includes a test bracket and a plurality of test suction cups provided on the test bracket, the distance sensor is installed on the test bracket, and the test suction cup is used to be adsorbed and installed on the target vehicle.

[0012] In one embodiment, a motor vehicle safety distance capture system detection device also includes a display mounting frame, the display mounting frame includes a display bracket, and a plurality of display suction cups provided on the display bracket, the display screen is installed on the display bracket, and the display suction cup is used to be adsorbed and installed on the target vehicle.

[0013] In one embodiment, the display screen is mounted outside the target vehicle.

[0014] Compared with the prior art, the advantages of the motor vehicle safety distance capture system detection device and method of the present invention are:

[0015] 1. The present invention installs the standard test system on the target vehicle, and does not need to be installed on the road capture system. The target vehicle travels normally on the road, and the same target vehicle can test several capture systems. The operation is convenient, the cost is low, and the interference with public transportation is avoided.

[0016] 2. The present invention utilizes display suction cups and display suction cups to achieve non-destructive loading and unloading, and the display screen and the standard detection system can be installed on ordinary vehicles for testing, and can be installed on different types of vehicles such as cars and trucks for testing, which is closer to the actual situation and has a wide range of applications.

[0017] 3. Since the present invention adopts the real-time display mode of the display screen, there is no need to measure the distance of the target vehicle at the moment of capturing the image. The present embodiment adopts the millimeter wave radar, which has a wide tracking area and can still track and measure the distance even if the vehicle's driving path changes. It is particularly suitable for measuring curves and tunnels.

[0018] 4. Since the present invention adopts the real-time display mode of the display screen, there is no need to measure the distance of the target vehicle at the moment of capturing the image. The present embodiment adopts the millimeter wave radar, which has a wide tracking area and can still track and measure the distance even if the vehicle's driving path changes. It is particularly suitable for measuring curves and tunnels.

[0019] 5. The present invention can effectively detect both the capture system of the marking distance measurement method and the capture system of the direct distance measurement method, and the detection method is convenient and does not interfere with normal road traffic.

[0020] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of a detection device of a motor vehicle safety distance capture system in use according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the side structure of a target vehicle in an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of the main structure of a target vehicle in an embodiment of the present invention;

[0025] Figure 4 Schematic diagram of the tail structure of the target vehicle in the embodiment of the present invention.

[0026] Among them, 10. Capture system, 11. Target vehicle, 12. Vehicle in front, 13. Lock, 20. Standard test system, 21. Test host, 22. Distance sensor, 23. Test mounting frame, 24. Test bracket, 25. Test suction cup, 30. Display screen, 31. Display mounting frame, 32. Display bracket, 33. Display suction cup, 34. Lifting rope. DETAILED DESCRIPTION

[0027] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "test" and "display" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The present embodiment provides a motor vehicle safety distance capture system detection method, including: installing a standard test system 20 and a display screen 30 on a target vehicle 11, the standard test system 20 detects the distance d between the target vehicle 11 and the front measurement in real time, and displays the detection result on the display screen 30 in real time; the target vehicle 11 follows the front vehicle 12 through the capture system 10, the capture system 10 captures the target vehicle 11, and the display screen 30 is photographed by the capture system 10 at the same time, and the vehicle distance D detected by the capture system 10 is obtained; comparing the vehicle distance D detected by the capture system 10 and the vehicle distance d displayed on the display screen 30, it is determined whether the distance measurement of the capture system 10 is accurate.

[0031] In this embodiment, the standard test system 20 has a distance measurement function. The standard test system 20 is installed on the target vehicle 11, and the distance measurement between the target vehicle 11 and the preceding vehicle is displayed in real time on the display screen 30. When the capture system 10 captures the target vehicle 11, the display screen 30 can be photographed at the same time. The real-time vehicle distance d displayed on the display screen 30 is recorded synchronously. The capture system 10 measures the vehicle distance D at the same time. By comparing the vehicle distance D calculated by the capture system 10 with the real-time vehicle distance d on the display screen 30 in the photographed photo, it can be determined whether the distance measurement of the capture system 10 is accurate. In this embodiment, the standard test system 20 is installed on the target vehicle 11, and does not need to be installed on the road capture system 10. The target vehicle 11 travels normally on the road. The same target vehicle 11 can test several capture systems 10, which is easy to operate, low cost, and avoids interference with public transportation.

[0032] Furthermore, by comparing the vehicle distance D detected by the capture system 10 with the vehicle distance d displayed on the display screen 30 , the distance measurement function of the capture system 10 is calibrated.

[0033] The standard test system 20 also has a speed measurement function. The standard test system 20 detects the speed h of the target vehicle 11 in real time and displays the detection result on the display screen 30 in real time; when the target vehicle 11 passes through the capture system 10, the capture system 10 captures the target vehicle 11 and the display screen 30 is photographed by the capture system 10 at the same time, and the speed H detected by the capture system 10 is obtained; the speed H detected by the capture system 10 is compared with the speed h displayed on the display screen 30 to determine whether the speed measurement of the capture system 10 is accurate.

[0034] Furthermore, the vehicle speed H detected by the capture system 10 is compared with the vehicle speed h displayed on the display screen 30 to calibrate the speed measurement function of the capture system 10 .

[0035] like Figures 1 to 4 As shown, this embodiment also provides a motor vehicle safety distance capture system detection device, which is used for any of the aforementioned detection methods, including a standard test system 20 and a display screen 30. The standard test system 20 is electrically connected to the display screen 30, and the display screen 30 is installed on the target vehicle 11. The display screen 30 is located at a position where it can be photographed by the capture system 10.

[0036] The standard test system 20 includes a test host 21 and a distance sensor 22, and the test host 21 and the distance sensor 22 are electrically connected. The test host 21 includes a distance measurement system and a speed measurement system. The distance measurement system obtains distance measurement according to the signal of the distance sensor 22, and the speed measurement system performs positioning and speed measurement according to GPS or Beidou, or measures speed according to wheel speed.

[0037] In this embodiment, the distance sensor 22 is a millimeter wave radar. The current distance measurement method usually sets up a test section. When the target vehicle 11 passes through the test section, the laser rangefinder is controlled to measure the distance of the target vehicle 11 at the moment of capturing. In order to respond in time, laser radar distance measurement is usually used. However, the laser radar tracking has strong directionality. If the vehicle misses the test section or the driving path changes, it is easy for the laser radar to miss the target. In this embodiment, due to the real-time display method of the display screen 30, it is not necessary to measure the distance of the target vehicle 11 at the moment of capturing. This embodiment uses a millimeter wave radar. The millimeter wave radar has a wide tracking area. Even if the vehicle's driving path changes, it can still track and measure the distance. It is particularly suitable for measuring curves and tunnels. In addition, it can lock the designated vehicle 12 in the same lane ahead. As long as the front vehicle is within the effective measurement range, even if other vehicles enter the test lane during measurement, it will not affect the detection.

[0038] The present embodiment further includes a test mounting frame 23, the test mounting frame 23 includes a test bracket 24, and a plurality of test suction cups 25 provided on the test bracket 24, the distance sensor 22 is installed on the test bracket 24, and the test suction cup 25 is used for adsorption and installation on the target vehicle 11. The test suction cup 25 is adsorbed on the outer wall of the target vehicle 11, and the distance sensor 22 is installed outside the target vehicle 11 through the test suction cup 25. The distance sensor 22 detects the distance more accurately, and non-destructive disassembly is achieved. The test equipment can be installed on ordinary vehicles for testing, and can be installed on different types of vehicles such as cars and trucks for testing, which is closer to the actual situation and has a wide range of applications.

[0039] The present embodiment further includes a display mounting frame 31, which includes a display bracket 32 ​​and a plurality of display suction cups 33 disposed on the display bracket 32. The display screen 30 is mounted on the display bracket 32, and the display suction cups 33 are used to be adsorbed and mounted on the target vehicle 11. The display suction cups 33 are adsorbed on the outer wall of the target vehicle 11, and the display screen 30 is mounted outside the target vehicle 11 through the display suction cups 33. When the capture system 10 captures, the display screen 30 is taken more clearly, and non-destructive disassembly is achieved. The display screen 30 can be installed on ordinary vehicles for testing, and can be installed on different types of vehicles such as cars and trucks for testing, which is closer to the actual situation and has a wide range of applications.

[0040] The display screen 30 is installed on the roof or the front of the target vehicle 11 (such as Figure 3 as shown), or the rear of the vehicle (as shown Figure 4 As shown). A capture system 10 suitable for capturing the front of a vehicle or capturing the rear of a vehicle can also be flexibly set according to the measurement shape.

[0041] The inspector is in the target vehicle 11, and the test host 21 is arranged in the target vehicle 11, which is convenient for the inspector to operate the test host 21. The distance sensor 22 is installed outside the target vehicle 11, which is conducive to accurately measuring the distance between the target vehicle 11 and the front vehicle 12. The display screen 30 is installed outside the target vehicle 11. It is convenient for the capture system 10 to take clear photos.

[0042] Instead of using the suction cup adsorption installation method, the display mounting frame 31 may be designed to be provided with a hanging rope 34, and the hanging rope 34 ties the display screen 30 to the target vehicle 11. For example, the trunk of the target vehicle 11 is provided with a hook, and the lock buckle 13 provided with the trunk lock may be used to tie the hanging rope 34 to the hook or the lock buckle 13, and the display screen 30 may be hung outside the target vehicle 11, and the trunk may be closed, which does not affect the normal driving function of the vehicle, and the hanging is firm and the display screen 30 is not easy to fall off.

[0043] The present invention is described above in conjunction with the best embodiment, but the present invention is not limited to the above disclosed embodiment, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A motor vehicle safety distance capture system detection method, characterized in that: include: A standard test system and a display screen are installed on the target vehicle, and the standard test system detects the distance d between the target vehicle and the vehicle in front in real time, and displays the detection result on the display screen in real time; The target vehicle follows the vehicle in front and passes through the capture system. The capture system captures the target vehicle and the display screen is captured by the capture system at the same time, and the vehicle distance D detected by the capture system is obtained; Compare the vehicle distance D detected by the capture system with the vehicle distance d displayed on the display screen to determine whether the distance measurement of the capture system is accurate.

2. A motor vehicle safety distance capture system detection method according to claim 1, characterized in that: Compare the vehicle distance D detected by the capture system with the vehicle distance d displayed on the display screen to calibrate the distance measurement function of the capture system.

3. A motor vehicle safety distance capture system detection method according to claim 1, characterized in that: The standard test system detects the speed h of the target vehicle in real time, and displays the detection result on the display screen in real time; The target vehicle passes through the capture system, the capture system captures the target vehicle and the display screen is captured by the capture system at the same time, and the vehicle speed H detected by the capture system is obtained; Compare the vehicle speed H detected by the capture system with the vehicle speed h displayed on the display screen to determine whether the speed measurement of the capture system is accurate.

4. A motor vehicle safety distance capture system detection method according to claim 3, characterized in that: Compare the vehicle speed H detected by the capture system with the vehicle speed h displayed on the display screen to calibrate the speed measurement function of the capture system.

5. A motor vehicle safety distance capture system detection device, used to implement the method according to any one of claims 1 to 4, characterized in that: It includes a standard test system and a display screen. The standard test system is electrically connected to the display screen. The display screen is installed on a target vehicle and is located at a position where it can be photographed by a capture system.

6. A motor vehicle safety distance capture system detection device according to claim 5, characterized in that: The standard test system includes a test host and a distance sensor, and the test host and the distance sensor are electrically connected.

7. A motor vehicle safety distance capture system detection device according to claim 6, characterized in that: The distance sensor is a millimeter wave radar.

8. The detection device of the motor vehicle safety distance capture system according to claim 6, characterized in that: It also includes a test mounting frame, which includes a test bracket and a plurality of test suction cups arranged on the test bracket. The distance sensor is installed on the test bracket, and the test suction cup is used for adsorption and installation on the target vehicle.

9. A motor vehicle safety distance capture system detection device according to any one of claims 5 to 8, characterized in that: It also includes a display mounting frame, which includes a display bracket and a plurality of display suction cups arranged on the display bracket. The display screen is installed on the display bracket, and the display suction cups are used for adsorption and installation on the target vehicle.

10. A motor vehicle safety distance capture system detection device according to any one of claims 5 to 8, characterized in that: The display screen is installed outside the target vehicle.

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