A high-efficiency vehicle-mounted road marking detection device

Abstract

The utility model relates to a kind of high-efficiency vehicle-mounted road marking detection device, it is related to road marking detection technical field, the detection device includes: cantilevered plate is connected in the top of vehicle and is located in the rear of the tail of vehicle;Camera is located at the bottom of the cantilevered plate and is inclined downward setting;Reverse reflection measuring mechanism is located at the bottom of the cantilevered plate and can be rotatably adjusted, by rotating adjustment, the reverse reflection measuring mechanism can be adapted to different incident angle and observation angle.Reverse reflection measuring mechanism includes light source assembly and photosensitive component, light source assembly can emit light to road marking;Photosensitive component can receive the light reflected by road marking and convert into electrical signal, and then the inverse reflection coefficient of road marking can be calculated according to the electrical signal.The utility model realizes the inverse reflection coefficient of road marking in the normal driving process of vehicle real-time, continuously, efficiently measured and the road marking is stored by shooting, without road closure, improve detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of road marking detection technology, and specifically to a high-efficiency vehicle-mounted road marking detection device. Background Technology

[0002] With the continuous development of the transportation industry, the clarity, integrity, and visibility performance of road markings are of great significance for ensuring driving safety. Retroreflective brightness coefficient and appearance defects of road markings are important evaluation indicators of road marking performance, and their measurement accuracy and efficiency directly affect the maintenance and management of road markings. However, traditional portable retroreflective testing instruments require road closures for sampling inspections, which is not only inefficient but also poses safety hazards in some areas. Currently, the detection of appearance defects in road markings mainly relies on manual identification and inspection, which is inefficient and has high labor costs. Utility Model Content

[0003] The purpose of this invention is to overcome some of the difficulties in existing detection technologies and provide an efficient vehicle-mounted road marking detection device. This solves the problems of existing technologies being able to only perform sampling inspections of road markings, which is not only inefficient but also poses certain safety hazards, as well as the problems of relying on manual identification for the detection of road marking appearance defects, which is inefficient and has high labor costs.

[0004] The technical solution to achieve the above objective is: a high-efficiency vehicle-mounted road marking detection device, installed on a vehicle, the detection device comprising:

[0005] A cantilever panel connected to the top of the vehicle and located at the rear of the vehicle;

[0006] A camera is located at the bottom of the cantilever slab and is tilted downwards;

[0007] The retroreflection measuring mechanism, which is located at the bottom of the cantilever plate and is rotatable and adjustable, can be adapted to different incident angles and observation angles by rotational adjustment.

[0008] A further improvement of this utility model of a high-efficiency vehicle-mounted road marking detection device is that a supplementary light source is provided on the cantilever plate near the camera.

[0009] A further improvement of this utility model of a high-efficiency vehicle-mounted road marking detection device is that two cameras are provided, located on both sides of the cantilever plate.

[0010] A further improvement of this utility model of a high-efficiency vehicle-mounted road marking detection device is that two retroreflection measuring mechanisms are also provided, located on both sides of the cantilever plate.

[0011] A further improvement of this utility model of a high-efficiency vehicle-mounted road marking detection device is that a driving mechanism is provided at the bottom of the cantilever plate, the driving mechanism is driven to be connected to the retroreflection measuring mechanism, and the driving mechanism can drive the retroreflection measuring mechanism to rotate and adjust.

[0012] A further improvement of this utility model of a high-efficiency vehicle-mounted road marking detection device is that the drive mechanism includes a motor located at the bottom of the cantilever plate and a drive gear connected to the motor shaft of the motor.

[0013] The retroreflection measuring mechanism is rotatably mounted on the bottom of the cantilever plate via a rotating shaft, and a transmission gear is sleeved on the rotating shaft;

[0014] The transmission gear meshes with the drive gear;

[0015] The motor can drive the drive gear to rotate, which in turn drives the transmission gear to rotate, and the transmission gear rotates the shaft together, thereby driving the reflection measuring mechanism to rotate and adjust.

[0016] A further improvement of this utility model of a high-efficiency vehicle-mounted road marking detection device is that the retroreflection measuring mechanism includes a housing, a light source assembly disposed within the housing, and a photosensitive assembly disposed within the housing;

[0017] The housing has openings corresponding to the light source assembly and the photosensitive assembly;

[0018] The light source assembly is positioned above the photosensitive assembly;

[0019] The light source assembly can emit light toward the road markings;

[0020] The photosensitive component can receive light reflected from road markings.

[0021] A further improvement of this utility model of a high-efficiency vehicle-mounted road marking detection device is that multiple light source components and multiple photosensitive components are provided, and the light source components and multiple photosensitive components are arranged in a one-to-one correspondence.

[0022] A further improvement of this utility model of a high-efficiency vehicle-mounted road marking detection device is that it also includes a data storage unit, which is connected to the camera and the retroreflective measuring mechanism.

[0023] A further improvement of this utility model of a high-efficiency vehicle-mounted road marking detection device is that a mounting rod is provided on the top of the cantilever plate, and one end of the mounting rod extends out of the cantilever plate to form a mounting end.

[0024] By utilizing the above technical solution, the technical effects achieved by this utility model compared to the prior art are as follows:

[0025] This invention provides a high-efficiency vehicle-mounted road marking detection device. It continuously captures video image data of road markings using a camera while the vehicle is in motion. A rotatable and adjustable retroreflection measurement mechanism adapts to different incident and observation angles. This mechanism calculates the retroreflection coefficient of the road markings while the vehicle is in motion. This detection device boasts advantages such as high measurement efficiency, convenient operation, high precision, high stability, and high reliability, making it suitable for various road marking detection needs. This invention achieves real-time, continuous, and efficient measurement of the retroreflection coefficient of road markings during normal vehicle operation, as well as capturing and storing the video image data of the road markings, without requiring road closures, thus improving detection efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a high-efficiency vehicle-mounted road marking detection device of this utility model installed on a vehicle.

[0027] Figure 2 This is a side view of a high-efficiency vehicle-mounted road marking detection device according to the present invention.

[0028] Figure 3 This is a system diagram of a high-efficiency vehicle-mounted road marking detection device according to the present invention. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] This invention provides a high-efficiency vehicle-mounted road marking detection device, designed to improve the efficiency and safety of road marking detection. It can measure the retroreflection coefficient of road markings and photograph them, featuring high efficiency, convenience, high precision, high stability, and high reliability. It supports data storage and export, and is suitable for road marking detection needs, significantly improving detection efficiency and safety. The high-efficiency vehicle-mounted road marking detection device is described below.

[0031] See Figure 1 This diagram shows a structural schematic of a high-efficiency vehicle-mounted road marking detection device of this invention mounted on a vehicle. (See attached diagram.) Figure 2 The image shows a side view of a high-efficiency vehicle-mounted road marking detection device according to this utility model. The following is in conjunction with... Figure 1 and Figure 2 The structure of the high-efficiency vehicle-mounted road marking detection device of this utility model is described.

[0032] like Figure 1and Figure 2 As shown, this utility model discloses a high-efficiency vehicle-mounted road marking detection device, comprising a cantilever plate 31, a camera 33, and a retroreflection measuring mechanism 34. The cantilever plate 31 is connected to the top of the vehicle 20 and is located behind the rear of the vehicle 20, i.e., the cantilever plate 31 is suspended out and located behind the vehicle 20. The camera 33 is located at the bottom of the cantilever plate 31 and is tilted downwards. The camera 33 can capture images of the road marking 10 diagonally below, forming video image data of the road marking. The retroreflection measuring mechanism 34 is located at the bottom of the cantilever plate 31 and is rotatably adjustable on the cantilever plate 31. By rotating and adjusting, the retroreflection measuring mechanism 34 can adapt to different incident angles and observation angles. The retroreflection measuring mechanism 34 is used to detect the retroreflection coefficient of the road marking 10.

[0033] In one specific embodiment of this utility model, a supplementary light source is provided on the cantilever plate 31 near the camera 33. The orientation of the supplementary light source is consistent with the orientation of the camera 33. The supplementary light source can provide supplementary lighting for the camera 33, that is, when the light is insufficient, the supplementary light source can improve the brightness of the camera 33, so that the camera 33 can capture clear video image data.

[0034] Furthermore, a light sensor is also installed on the cantilever slab 31 near the camera 33. This light sensor is used to detect the intensity of ambient light and then select whether to turn on a supplementary light source to provide supplementary illumination based on the intensity of the light. For example, a first reference intensity can be set. When the light intensity detected by the light sensor is lower than the first reference intensity, the supplementary light source is turned on to provide supplementary illumination to the camera 33, avoiding the problem of blurry photos due to insufficient light.

[0035] Specifically, a control module or control host can be set up to connect with the supplementary light source and the light sensor, so as to control the supplementary light source to be turned on to provide supplementary lighting when the light intensity is insufficient (which may be less than the first reference intensity).

[0036] A lens attenuator is also installed on camera 33. This lens attenuator can be deployed during use and its activation is selected based on the light intensity. For example, a second reference intensity can be set. When the light intensity detected by the light sensor is higher than this second reference intensity, camera 33 deploys the lens attenuator to reduce stray light entering the lens and prevent unclear images of tracing defects caused by excessive light intensity. The main function of this lens attenuator is to reduce the amount of light entering the camera, uniformly reducing the intensity of light across all wavelengths, thereby changing the exposure without affecting the relative brightness of the scene and improving image quality in strong light environments. Specifically, a control module or control host can also be set up, connected to the lens attenuator and the light sensor, to control the lens attenuator to deploy when the light intensity is too high (which could be greater than the second reference intensity), thus reducing stray light entering the lens.

[0037] Furthermore, such as Figure 2 As shown, there are two cameras 33, located on both sides of the cantilever slab 31.

[0038] Two cameras 33 can be used to photograph the road markings 10 on both sides of the vehicle 20.

[0039] Furthermore, the bottom of the cantilever plate 31 is provided with a base 331 and a bracket 332 connected to the base 331 by a pin. The other end of the bracket 332 is connected to the camera 33. The bracket 332 can rotate and adjust around the pin, thereby adjusting the setting posture of the camera 33. After adjustment, the bracket 332 can be fixed by tightening the nuts. Specifically, the base 331 is provided with a connecting ear plate. The other end of the bracket 332 is attached to one side of the connecting ear plate. Then, the pin passes through the end of the bracket 332 and the connecting ear plate. Nuts are screwed to both ends of the pin. The bracket 332 can be secured by tightening the nuts.

[0040] In one specific embodiment of this utility model, two retroreflection measuring mechanisms 34 are also provided, located on both sides of the cantilever plate 31, for measuring the retroreflection coefficient of the road markings 10 on both sides of the vehicle 20.

[0041] Furthermore, a drive mechanism is provided at the bottom of the cantilever plate 31. This drive mechanism is connected to the retroreflection measuring mechanism 34 and can drive the retroreflection measuring mechanism 34 to rotate and adjust.

[0042] Preferably, the drive mechanism includes a motor 35 located at the bottom of the cantilever plate 31 and a drive gear 351 connected to the motor shaft of the motor 35; the retroreflection measuring mechanism 34 is rotatably mounted at the bottom of the cantilever plate 31 via a rotating shaft 345, on which a transmission gear 346 is sleeved; the transmission gear 346 meshes with the drive gear 354; the motor 35 can drive the drive gear 351 to rotate, which in turn drives the transmission gear 346 to rotate, and the transmission gear 346 rotates together with the rotating shaft 345, thereby realizing the rotation adjustment of the drive reflection measuring mechanism 34.

[0043] Specifically, the bottom of the cantilever plate 31 is provided with an ear plate seat 343, on which a pair of ear plates are provided. The top of the retroreflection measuring mechanism 34 is provided with a connecting plate 344, which is inserted between the pair of ear plates. The rotating shaft 345 passes through the pair of ear plates and the connecting plate 344. The rotating shaft 345 is fixedly connected to the connecting plate 344, for example, by welding. A nut is connected to one end of the rotating shaft 345 to prevent the rotating shaft 345 from disengaging from the ear plate seat 343. The other end of the rotating shaft 345 is fitted with a fixed transmission gear 346.

[0044] The rotating shaft 345 is set in the same direction as the width of the cantilever plate 31 and perpendicular to the driving direction of the vehicle 20. The retroreflection measuring mechanism 34 is driven to rotate by the motor 35. The rear side of the retroreflection measuring mechanism 34 is provided with an opening 342 for detection. The incident angle and the observation angle can be adjusted by rotating it.

[0045] Furthermore, the retroreflection measuring mechanism 34 includes a housing 341, a light source assembly disposed within the housing 341, and a photosensitive assembly disposed within the housing; the housing 341 has an opening 342 corresponding to the light source assembly and the photosensitive assembly; the light source assembly is disposed above the photosensitive assembly; the light source assembly can emit light towards the road marking 10; the photosensitive assembly can receive the light reflected from the road marking 10.

[0046] Specifically, the light source component emits light towards the road marking 10 through the corresponding opening 342, and the photosensitive component receives the reflected light from the road marking 10 through the corresponding opening 342 and converts it into an electrical signal. The retroreflection coefficient of the road marking can then be calculated based on this electrical signal. The method for calculating the retroreflection coefficient can be the same as that used in existing retroreflection marking measuring instruments, or it can refer to the testing methods in the People's Republic of China National Standard GB / T 16311-2009 "Quality Requirements and Testing Methods for Road Traffic Markings" and the measurement methods in the People's Republic of China Transportation Industry Standard JT / T690-2022 "Methods for Measuring the Photometric Performance of Retroreflectors" to calculate the retroreflection coefficient.

[0047] Furthermore, there are multiple light source components and photosensitive components, and each light source component and photosensitive component is set in a one-to-one correspondence.

[0048] Multiple light source components and photosensitive components are set on a retroreflection measurement mechanism 34, which can simultaneously measure the retroreflection coefficient of multiple points. Then, during the detection, the multiple retroreflection coefficients can be averaged, thereby reducing the measurement error.

[0049] The light source assembly includes a light source, and a convex lens, cylindrical mirror, and lens barrel can be arranged in front of the light source. The photosensitive assembly includes optical elements such as a detector, filter, lens, and reflector. The optical elements such as the lens and reflector can focus the reflected light onto the filter, and then onto the detector. The detector is used to receive and convert the reflected light signal into an electrical signal. The detector can be a silicon diode.

[0050] In one specific embodiment of this utility model, a data storage unit is further included, which is connected to the camera 33 and the retroreflection measurement mechanism 34. The data storage unit can store video image data captured by the camera 33 and the result data detected by the retroreflection measurement mechanism 34.

[0051] In one specific embodiment of this utility model, such as Figure 1 and Figure 2 As shown, a mounting rod 32 is provided on the top of the cantilever plate 31, with one end of the mounting rod 32 extending out of the cantilever plate 31 to form a mounting end. The mounting end of the mounting rod 32 can be fixed to the top of the vehicle 20.

[0052] In one specific embodiment of this utility model, such as Figure 3 As shown, the high-efficiency vehicle-mounted road marking detection device of this utility model also includes a control host connected to the retroreflection measurement mechanism 34, the drive mechanism, the camera 33, and the supplementary light source. The control host can be installed on the cantilever plate 31, or it can be installed in a remote control center or on the vehicle 20. The control host can be connected to the retroreflection measurement mechanism 34, the drive mechanism, the camera 33, and the supplementary light source via signal lines, or it can be connected wirelessly to the retroreflection measurement mechanism 34, the drive mechanism, the camera 33, and the supplementary light source.

[0053] The control host can control the operation of the drive mechanism to adjust the setting angle of the retroreflection measurement mechanism 34. It can also control the light source component of the retroreflection measurement mechanism 34 to emit light and the photosensitive component to receive light, thereby storing the electrical signal of the received reflected light in the data storage unit for subsequent calculation of the retroreflection coefficient. The control host can also control the on / off state of the supplementary light source and receive video image data captured by the camera 33, storing the video image data in the data storage unit.

[0054] A data processing system is installed at the control host, which can read the electrical signal of reflected light stored in the data storage unit and then calculate the retroreflection coefficient. The method for calculating the retroreflection coefficient can be the same as that of the existing retroreflection marking measuring instrument, or the testing method in the People's Republic of China National Standard GB / T 16311-2009 "Quality Requirements and Testing Methods for Road Traffic Markings" and the measurement method in the People's Republic of China Transportation Industry Standard JT / T690-2022 "Measurement Method for Photometric Performance of Retroreflectors" can be used to calculate the retroreflection coefficient.

[0055] After the control host obtains the results from the data processing system, it can display the results on a screen, which can be a screen at a remote control center or a vehicle-mounted screen.

[0056] Preferably, the detection device of this utility model can be appropriately adjusted in terms of structure and parameters according to actual needs. For example, the luminous intensity, wavelength and angle of the light source component can be adjusted according to the characteristics of different road markings and detection requirements, and the receiving parameters can be adjusted according to the sensitivity and dynamic range of the photosensitive component.

[0057] The video image data captured by camera 33 stored in the data storage unit can be used to detect the status of road markings, such as whether the appearance is damaged or clear and complete. Detecting the status of road markings using video image data can be done using methods disclosed in existing technologies, such as the road traffic marking recognition method disclosed in a prior Chinese patent (patent application number: 202210085699.0, invention title: A Road Traffic Marking Recognition Method and Device), which can indicate the status of traffic markings, including clear, partially missing, and blurred states. Alternatively, image comparison methods can be used. Images are extracted frame by frame from the stored video image data, processed, and then compared with a preset standard image (which can also be obtained by capturing images with a camera, making it easier to align the standard image with the extracted image) to determine the status of the road markings.

[0058] The beneficial effects of this high-efficiency vehicle-mounted road marking detection device are as follows:

[0059] 1. It can measure the retroreflection coefficient of road markings in real time, continuously and efficiently, and capture and store video image data of road markings during normal vehicle operation. The captured video image data of road markings can be used to detect the status of road markings without closing the road, thus improving detection efficiency.

[0060] 2. It has high precision, high stability and high reliability, and can meet the needs of different road marking detection.

[0061] 3. It can automatically store and export data, facilitating subsequent data analysis and processing.

[0062] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A high-efficiency vehicle-mounted road marking detection device, installed on a vehicle, characterized in that, The detection device includes: A cantilever panel connected to the top of the vehicle and located at the rear of the vehicle; A camera is located at the bottom of the cantilever slab and is tilted downwards; The retroreflection measuring mechanism, which is located at the bottom of the cantilever plate and is rotatable and adjustable, can be adapted to different incident angles and observation angles by rotational adjustment.

2. The high-efficiency vehicle-mounted road marking detection device according to claim 1, characterized in that, A supplementary light source is provided on the cantilever board near the camera.

3. The high-efficiency vehicle-mounted road marking detection device according to claim 1, characterized in that, Two cameras are provided, located on both sides of the cantilever board.

4. The high-efficiency vehicle-mounted road marking detection device according to claim 3, characterized in that, Two retroreflection measuring mechanisms are also provided, located on both sides of the cantilever plate.

5. The high-efficiency vehicle-mounted road marking detection device according to claim 1, characterized in that, The bottom of the cantilever plate is provided with a drive mechanism, which is driven to the retroreflection measuring mechanism. The drive mechanism can drive the retroreflection measuring mechanism to rotate and adjust.

6. The high-efficiency vehicle-mounted road marking detection device according to claim 5, characterized in that, The drive mechanism includes a motor located at the bottom of the cantilever plate and a drive gear connected to the motor shaft. The retroreflection measuring mechanism is rotatably mounted on the bottom of the cantilever plate via a rotating shaft, and a transmission gear is sleeved on the rotating shaft; The transmission gear meshes with the drive gear; The motor can drive the drive gear to rotate, which in turn drives the transmission gear to rotate, and the transmission gear rotates the shaft together, thereby driving the reflection measuring mechanism to rotate and adjust.

7. A high-efficiency vehicle-mounted road marking detection device according to claim 1 or 5, characterized in that, The retroreflection measurement mechanism includes a housing, a light source assembly disposed within the housing, and a photosensitive assembly disposed within the housing; The housing has openings corresponding to the light source assembly and the photosensitive assembly; The light source assembly is positioned above the photosensitive assembly; The light source assembly can emit light toward the road markings; The photosensitive component can receive light reflected from road markings.

8. The high-efficiency vehicle-mounted road marking detection device according to claim 7, characterized in that, Multiple light source components and multiple photosensitive components are provided, and each light source component and each photosensitive component is arranged in a one-to-one correspondence.

9. The high-efficiency vehicle-mounted road marking detection device according to claim 1, characterized in that, It also includes a data storage unit, which is connected to the camera and the retroreflection measurement mechanism.

10. The high-efficiency vehicle-mounted road marking detection device according to claim 1, characterized in that, The top of the cantilever slab is provided with a mounting rod, one end of which extends out of the cantilever slab to form a mounting end.

Images