Array laser vehicle type identification and vehicle separation device and detection method

Abstract

The invention discloses an array laser vehicle type identification and vehicle separation device and a detection method, one device can complete data acquisition and processing, the space required for installation is smaller, the device can be directly installed and placed in a use road section, the road condition range of the installation road section of the device is wider, the applicability is higher, the practicability of on-site vehicle type identification is improved, and the detection efficiency is improved. The requirements of unattended operation and all-weather measurement can be met; the millimeter-wave radar window and the array laser sensor window are both arranged on the front side of the shell body, the cabinet door is located on the rear side of the shell body and connected to the shell body through hinges, and the millimeter-wave radar is installed on the rear side wall, corresponding to the millimeter-wave radar window, in the shell body. An array laser sensor is installed on the rear side wall, corresponding to the array laser sensor window, of the interior of the shell body, a data processing unit is further installed in the shell body, and the data processing unit comprises a temperature and humidity sensor.

Description

Technical Field

[0001] The invention discloses an array laser vehicle type recognition and vehicle separation device and a detection method, belonging to the technical field of vehicle detection. Background Art

[0002] At present, the device for identifying vehicle models is widely used in traffic management departments to manage overloaded transportation and weight-based charging systems, playing an important role in traffic management, overload management and import and export supervision.

[0003] In the existing vehicle axle measurement, pressure-variable sensing, laser radar scanning, AI recognition image recognition and other methods are mainly used. However, these methods all have certain defects, such as: pressure-variable sensing (including piezoelectric, quartz, strain gauge, etc.) generally relies on the wheel pressing on it to measure the axle type, which has high construction requirements, high maintenance costs, and cannot accurately separate vehicles; laser radar scanning is achieved by sector scanning of internal mechanical parts, with low recognition frequency, high production precision requirements and costs, and it is limited by climatic conditions, especially on rainy days, the recognition rate will decrease; AI image recognition has certain requirements for ambient lighting, and if the light intensity is too high or too low, it will affect the recognition effect. Summary of the invention

[0004] The present invention overcomes the shortcomings of the prior art and provides an array laser vehicle type recognition and vehicle separation device and detection method, which solves the problem that the prior art cannot measure errors under special weather conditions, reduces the overall manufacturing difficulty and cost, and one device can complete data collection and processing. The installation requires less space and can be directly installed and placed on the road section in use. The device can be installed in a wider range of road conditions and has stronger applicability, which not only improves the practicability of on-site vehicle type recognition, but also meets the requirements of unattended and all-weather measurement.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: using the common millimeter-wave radar and laser sensor on the market to measure and reduce costs, and using the 600HZ array laser sensor direct method to improve the measurement accuracy; the 600HZ array laser sensor uses multi-angle measurement to measure various vehicle contour information to ensure accurate measurement of various types of vehicle models; the external window is sealed with infrared high-transmittance glass and the casing to reduce internal dust and increase the service life of the equipment; the environmental conditions are monitored in real time according to the temperature and humidity sensors of the processing unit, supplemented by 50HZ millimeter-wave radar review to reduce the impact of environmental light and rainy days.

[0006] The specific structure is: an array laser vehicle type recognition and vehicle separation device, including a millimeter wave radar window, an array laser sensor window, a housing body, a hinge, a bottom plate, a level adjustment screw and a cabinet door. The housing body is arranged on a bottom plate, and a plurality of level adjustment screws are arranged on the bottom plate, and the level of the housing body can be adjusted on site by the level adjustment screws; The millimeter wave radar window and the array laser sensor window are both arranged on the front side of the shell body, and the cabinet door is located on the rear side of the shell body. The cabinet door is connected to the shell body through a hinge to realize the cabinet door rotating around the shell body; A millimeter-wave radar is installed on the rear side wall inside the housing body corresponding to the millimeter-wave radar window to realize the verification of vehicle separation; An array laser sensor is installed on the rear side wall inside the housing body corresponding to the array laser sensor window, and is used to monitor the presence or absence of vehicles and vehicle axle-related data in real time; A data processing unit is also installed in the shell body, and the data processing unit includes a temperature and humidity sensor, which is used for power supply and output data processing of the array laser sensor and millimeter wave radar, and output of corresponding signals.

[0007] Furthermore, the millimeter wave radar is installed above the array laser sensor to realize the vehicle review without affecting the measurement of the array laser sensor.

[0008] Furthermore, the array laser sensor is arranged in a multi-angle array to identify the axle types of various vehicle models and the presence or absence of vehicles; The plurality of array laser sensors are fixedly arranged on the profile through a laser sensor fixing plate, and the profile is fixed to the inner side wall of the housing body where the array laser sensor window is located through the profile fixing plate; Shading plates are installed on the profiles on both sides of the array laser sensor to achieve dust prevention and optical path protection for the array laser sensor.

[0009] Furthermore, the data processing unit is fixedly mounted on the outer side wall of the profile.

[0010] Furthermore, the bottom plate and the level adjustment screws can be adjusted to the shell body according to the site to ensure the level characteristics of the shell body.

[0011] Furthermore, the millimeter-wave radar, array laser sensor, and data processing unit are installed inside the outer shell body, the millimeter-wave radar window and the array laser sensor window are installed with infrared high-transmittance glass, and the cabinet door is installed with a dustproof sealing strip, which ensures the overall sealing of the inner part of the outer shell body, improves its service life, and reduces its maintenance cost.

[0012] The specific detection method is: Step S1: The array laser sensor sends distance information to the data processing unit in real time at a frequency of 500 Hz, and the millimeter wave radar sends reflection cross section and distance information to the data processing unit at a frequency of 50 Hz; Step S2: The data processing unit determines whether the temperature and humidity exceed the limit value, if so, executes step S4, if not, executes step S3; Step S3: After the data processing unit determines that the temperature and humidity do not exceed the limit value, the data processing unit caches the received array laser sensor and millimeter wave radar information, and compares the array laser sensor information with the previous information to observe whether there is a change. If there is a change, proceed to step S5, if there is no change, proceed to step S1; Step S4: After the data processing unit determines that the temperature and humidity exceed the limit value, the data processing unit caches the received array laser sensor and millimeter wave radar information, and compares the array laser sensor information and the millimeter wave radar information with the previous information to observe whether one of the information has changed. If it has changed, proceed to step S5, if not, proceed to step S1; Step S5: the data processing unit determines whether a vehicle has entered and outputs corresponding switch quantity information; Step S6: The data processing unit caches the distance and millimeter-wave radar profile information of all array laser sensors when the vehicle enters, and compares them with the next distance information and profile information, determines the axis type information, and accumulates the number of axes until the distance of the array laser sensor and the millimeter-wave radar are restored to the state before the vehicle enters, that is, step S8 or step S9; Step S7: The data processing unit determines whether the temperature and humidity exceed the limit value, if so, executes step S9, if not, executes step S8; Step S8: Check whether the distance of the array laser sensor and the millimeter wave radar are restored to the state before the vehicle enters. If not, execute step S6; if restored, execute step S10; Step S9: Check whether the distance of the array laser sensor or the millimeter wave radar is restored to the state before the vehicle enters. If not, execute step S6; if restored, execute step S10; Step S10: The data processing unit determines whether the vehicle has exited, and outputs corresponding switch quantity information and axle type information.

[0013] Compared with the prior art, the invention has the following beneficial effects.

[0014] (1) The present invention adopts a method for real-time dynamic measurement of vehicle axle type and axle number, thereby improving measurement efficiency. It uses an array laser sensor and a millimeter-wave radar sensor to verify each other and to judge the environment based on the temperature and humidity of the environment, thereby solving the problem that the prior art cannot measure errors in special weather conditions.

[0015] (2) The present invention adopts the commonly used laser sensors and millimeter wave radar sensors on the market, which reduces the overall manufacturing difficulty and manufacturing cost.

[0016] (3) The present invention includes a data acquisition and data processing unit, that is, one device can complete data acquisition and processing, and no longer needs to be connected to a server for auxiliary processing. The device can directly output the axis type, axis number and switch signal. The overall dimensions of the device are approximately 300×300×1200, and the installation space required is smaller. The device can be directly installed and placed on the road section in use, which not only improves the practicality of on-site vehicle model identification, but also meets the requirements of unattended and all-weather measurement.

[0017] (4) The 50HZ millimeter-wave radar and 600HZ array laser sensor can be used to measure vehicle speeds of 0-60. The bottom plate is equipped with adjustment screws and can be installed on inclined roads. The equipment can be installed in a wider range of road conditions and has greater applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the side sectional structure of the invention.

[0020] Figure 2 It is a front structural schematic diagram of the invention.

[0021] Figure 3 It is a schematic diagram of the detection process of the present invention.

[0022] In the figure: 1. millimeter-wave radar window; 2. array laser sensor window; 3. housing body; 4. hinge; 5. bottom plate; 6. level adjustment screw; 7. cabinet door; 8. millimeter-wave radar; 9. array laser sensor; 10. data processing unit; 11. sunshade; 12. profile; 13. laser sensor fixing plate; 14. profile fixing plate. DETAILED DESCRIPTION

[0023] The invention will be further described below in conjunction with specific embodiments.

[0024] Embodiment 1

[0025] like Figure 1 , Figure 2As shown, an array laser vehicle type recognition and vehicle separation device of the present invention comprises a millimeter wave radar window 1, an array laser sensor window 2, a shell body 3, a hinge 4, a bottom plate 5, a horizontal adjustment screw 6, and a cabinet door 7. The millimeter wave radar window 1 and the array laser sensor window 2 are both in front of the shell body 3, and the horizontal adjustment screw 6 is installed on the bottom plate 5 to achieve on-site horizontal adjustment of the shell body 3. The bottom plate 5 is at the lower side of the shell body 3, and the cabinet door 7 is located behind the shell body 3. The two are connected by a hinge 4 to achieve the cabinet door 7 rotating around the shell body 3. A millimeter wave radar 8 is installed behind the millimeter wave radar window 1 to achieve Vehicle separation review, an array laser sensor 9 is installed behind the array laser sensor window 2, which is used to monitor the presence of the vehicle and the vehicle axle-related data in real time. The array laser sensor 9 is installed inside the shell body 3 through the profile 12, the laser sensor fixing plate 13 and the profile fixing plate 14. The array laser sensor 9 is installed with shading plates 11 on the left and right to achieve dust and optical path protection for the array laser sensor 9. A data processing unit 10 is installed behind the profile 12, and includes a temperature and humidity sensor, which is used for power supply and output data processing of the array laser sensor 9 and the millimeter wave radar 8, and the output of the corresponding signal.

[0026] Embodiment 2

[0027] like Figure 3 As shown, the present invention provides an array laser vehicle type recognition and vehicle separation device detection method, and the implementation steps are as follows: Step S1: the array laser sensor 9 sends distance information to the processing unit in real time at a frequency of 500 Hz, and the millimeter wave radar 8 sends reflection cross section and distance information to the data processing unit 10 at a frequency of 50 Hz; Step S2: The data processing unit 10 determines whether the temperature and humidity exceed the limit value, and if so, executes step S4; if not, executes step S3; Step S3: After the data processing unit 10 determines that the temperature and humidity do not exceed the limit value, the data processing unit 10 caches the received information of the array laser sensor 9 and the millimeter wave radar 8, and compares the information of the array laser sensor 9 with the previous information to observe whether there is a change. If there is a change, step S5 is performed, and if there is no change, step S1 is continued; Step S4: After the data processing unit 10 determines that the temperature and humidity exceed the limit value, the data processing unit 10 caches the received information of the array laser sensor 9 and the millimeter wave radar 8, and compares the information of the array laser sensor 9 and the millimeter wave radar 8 with the previous information to observe whether one of the information has changed. If it has changed, proceed to step S5, if it has not changed, proceed to step S1; Step S5: the data processing unit 10 determines whether a vehicle enters and outputs corresponding switch quantity information; Step S6: the data processing unit 10 caches the distance information of all array laser sensors 9 and the contour information of the millimeter wave radar 8 when the vehicle enters, and compares them with the distance information and contour information of the next time, determines the axle type information, and accumulates the number of axles until the distance of the array laser sensor 9 and the millimeter wave radar 8 are restored to the state before the vehicle enters, that is, step S8 or step S9; Step S7: The data processing unit 10 determines whether the temperature and humidity exceed the limit value, and if so, executes step S9; if not, executes step S8; Step S8: Check whether the distance of the array laser sensor 9 and the millimeter wave radar 8 are restored to the state before the vehicle enters. If not, execute step S6; if restored, execute step S10; Step S9: Check whether the distance of the array laser sensor 9 or the millimeter wave radar 8 is restored to the state before the vehicle enters. If not, execute step S6; if restored, execute step S10; Step S10: the data processing unit 10 determines whether the vehicle is moving out, and outputs corresponding switch quantity information and axle type information.

[0028] To further illustrate, in step S6, step S1 is still executed in real time, that is: the array laser sensor 9 sends distance information to the data processing unit 10 at a frequency of 500 Hz in real time, and the millimeter wave radar 8 sends reflection cross section and distance information to the data processing unit 10 at a frequency of 50 Hz.

[0029] To further explain, in step S10, if the internally processed axis type and axis number information is not debugged, the intermediate processing and calculation information are not output, and only the corresponding switch quantity and axis type and axis number information are output.

[0030] To further explain, the temperature and humidity sensor on the processor is only used as a tool for monitoring the environment, but is not limited to this tool. Environmental detection tools such as smoke alarm, rain alarm, and light alarm can be added according to the on-site conditions. The above environmental detection tools can be installed outside or inside the shell.

[0031] The embodiments of the invention are described in detail above in conjunction with the accompanying drawings, but the invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the spirit of the invention.

Claims

1. A device for vehicle type recognition and vehicle separation using an array laser, characterized in that: The cabinet comprises a millimeter wave radar window (1), an array laser sensor window (2), a housing body (3), a hinge (4), a bottom plate (5), a horizontal adjustment screw (6) and a cabinet door (7), The housing body (3) is arranged on a bottom plate (5), and a plurality of level adjustment screws (6) are arranged on the bottom plate (5), and the level of the housing body (3) can be adjusted on site by means of the level adjustment screws (6); The millimeter wave radar window (1) and the array laser sensor window (2) are both arranged on the front side of the shell body (3); the cabinet door (7) is located on the rear side of the shell body (3); the cabinet door (7) is connected to the shell body (3) via a hinge (4) so ​​that the cabinet door (7) can rotate around the shell body (3); A millimeter wave radar (8) is installed on the rear side wall inside the housing body (3) corresponding to the millimeter wave radar window (1) to realize the verification of vehicle separation; An array laser sensor (9) is installed on the rear side wall inside the housing body (3) corresponding to the array laser sensor window (2) and is used to monitor the presence or absence of a vehicle and vehicle axle-related data in real time; A data processing unit (10) is also installed in the housing body (3), wherein the data processing unit (10) includes a temperature and humidity sensor and is used for powering the array laser sensor (9) and the millimeter wave radar (8), processing output data, and outputting corresponding signals.

2. The device for vehicle type recognition and vehicle separation using array laser according to claim 1, characterized in that: The millimeter wave radar (8) is installed above the array laser sensor (9) to realize vehicle verification without affecting the measurement of the array laser sensor (9).

3. The device for vehicle type recognition and vehicle separation using array laser according to claim 1, characterized in that: The array laser sensors (9) are arranged in a multi-angle array to identify the axle types of various vehicle models and the presence or absence of vehicles; The plurality of array laser sensors (9) are fixedly arranged on the profile (12) via a laser sensor fixing plate (13); the profile (12) is fixed to the inner side wall of the housing body (3) where the array laser sensor window (2) is located via a profile fixing plate (14); Shading plates (11) are installed on the profiles (12) on both sides of the array laser sensor (9), thereby achieving dust prevention and optical path protection for the array laser sensor (9).

4. The device for vehicle type recognition and vehicle separation using array laser according to claim 3, characterized in that: The data processing unit (10) is fixedly mounted on the outer side wall of the profile (12).

5. The device for vehicle type recognition and vehicle separation using array laser according to claim 1, characterized in that: The bottom plate (5) and the horizontal adjustment screw (6) can be used to adjust the housing body (3) according to the site, thereby ensuring the horizontal characteristics of the housing body (3).

6. The device for vehicle type recognition and vehicle separation using array laser according to claim 1, characterized in that: The millimeter wave radar (8), array laser sensor (9), and data processing unit installation (10) are installed inside the housing body (3); the millimeter wave radar window (1) and the array laser sensor window (2) are installed with infrared high-transmittance glass; the cabinet door (7) is installed with a dustproof sealing strip, thereby ensuring the sealing of the interior of the housing body (3) as a whole, improving its service life, and reducing its maintenance cost.

7. A detection method for the array laser vehicle type recognition and vehicle separation device as claimed in claim 1, characterized in that: Follow these steps to implement: Step S1: the array laser sensor (9) sends distance information to the data processing unit (10) in real time at a frequency of 500 Hz, and the millimeter wave radar (8) sends reflection cross section and distance information to the data processing unit (10) at a frequency of 50 Hz; Step S2: the data processing unit (10) determines whether the temperature and humidity exceed the limit value, and if so, executes step S4; if not, executes step S3; Step S3: after the data processing unit (10) determines that the temperature and humidity do not exceed the limit value, the data processing unit (10) caches the received information of the array laser sensor (9) and the millimeter wave radar (8), and compares the information of the array laser sensor (9) with the previous information to see whether there is a change. If there is a change, proceed to step S5; if there is no change, proceed to step S1; Step S4: after the data processing unit (10) determines that the temperature and humidity exceed the limit value, the data processing unit (10) caches the received information of the array laser sensor (9) and the millimeter wave radar (8), and compares the information of the array laser sensor (9) and the information of the millimeter wave radar (8) with the previous information to observe whether one of the information has changed. If so, proceed to step S5; if not, proceed to step S1; Step S5: the data processing unit (10) determines whether a vehicle has entered and outputs corresponding switch quantity information; Step S6: the data processing unit (10) caches the distance information of all array laser sensors (9) and the profile information of the millimeter wave radar (8) when the vehicle enters, and compares them with the distance information and profile information of the next time, determines the axis type information, and accumulates the number of axes until the distance information of the array laser sensor (9) and the millimeter wave radar (8) are restored to the state before the vehicle enters, that is, step S8 or step S9; Step S7: the data processing unit (10) determines whether the temperature and humidity exceed the limit value, and if so, executes step S9; if not, executes step S8; Step S8: whether the distance of the array laser sensor (9) and the millimeter wave radar (8) are restored to the state before the vehicle enters, if not restored, executing step S6, if restored, executing step S10; Step S9: whether the distance of the array laser sensor (9) or the millimeter wave radar (8) is restored to the state before the vehicle enters, if not restored, executing step S6, if restored, executing step S10; Step S10: the data processing unit (10) determines whether the vehicle has left the vehicle and outputs corresponding switch quantity information and axle type information.

Images