Double-radar speed measurement method for highway interval speed measurement

Abstract

The invention relates to the field of traffic speed measurement, in particular to a double-radar speed measurement method for highway interval speed measurement, which comprises the steps that a first radar speed measurement device and a second radar speed measurement device are respectively arranged at the starting point and the ending point of a highway interval and are both connected with a central data processing system; and the first radar speed measurement device and the second radar speed measurement device both have a multi-lane simultaneous speed measurement function. By arranging the double-radar speed measuring devices at the two ends of the expressway section and adopting the speed measuring method, the whole-course accurate monitoring of the vehicle running speed can be achieved, whether the vehicle is overspeed at the average speed in the section can be accurately judged, the overspeed time point and the section range of the vehicle in the section can be accurately positioned, and the speed measuring accuracy is improved. The accuracy of speed measurement and the effectiveness of law enforcement in the expressway interval are effectively improved, and powerful technical support is provided for guaranteeing the traffic safety of the expressway.

Description

Technical Field

[0001] The invention relates to the technical field of traffic speed measurement, and in particular to a dual radar speed measurement method for measuring speed in a highway section. Background Art

[0002] Highway interval speed measurement is an effective means of traffic management to monitor vehicle speeds and curb speeding violations. Traditional interval speed measurement systems mainly calculate average speeds based on the time taken to record photos of vehicles at the start and end of the interval, but this method has some limitations. For example, it is difficult to accurately identify the specific interval and time point of speeding behavior for vehicles that vary speed within the interval (such as speeding first and then slowing down), and it is impossible to provide timely and effective warnings and law enforcement for speeding behaviors.

[0003] Therefore, those skilled in the art provide a dual radar speed measurement method for highway section speed measurement to solve the problems raised in the above background technology. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a dual radar speed measurement method for highway interval speed measurement, so as to solve the above problems existing in the existing interval speed measurement technology, realize more accurate monitoring of the vehicle's driving speed within the interval and effective identification and processing of speeding behavior.

[0005] The following steps are involved:

[0006] The dual radar speed measurement method for highway section speed measurement of the present invention comprises the following steps:

[0007] Step 1: A first radar speed measuring device and a second radar speed measuring device are respectively set at the starting point and the end point of the expressway section. Both radar speed measuring devices are connected to the central data processing system, and both the first radar speed measuring device and the second radar speed measuring device have the function of simultaneous speed measurement in multiple lanes.

[0008] Step 2: When the vehicle enters the starting point of the interval, the first radar speed measuring device automatically detects the vehicle information, including the license plate number and vehicle model information, and obtains the precise timestamp T1 of the vehicle entering the starting point, while measuring the initial speed V1 of the vehicle, and transmits this information to the central data processing system.

[0009] Step 3: During the driving process of the vehicle, the first radar speed measuring device and the second radar speed measuring device continuously track and monitor the vehicle, and the first radar speed measuring device measures the vehicle speed V again at a predetermined time interval △T 1n (n=1,2,3......), and measure the time T 1n and speed V 1n The second radar speed measuring device also measures the vehicle speed V at the same time interval △T.2n , and measure the time T 2n and speed V 2n Transmitted to the central data processing system.

[0010] Step 4: When the vehicle reaches the end of the interval, the second radar speed measuring device detects the vehicle information and obtains the precise timestamp T2 of the vehicle's arrival at the end, and measures the vehicle's final speed V2, and transmits this information to the central data processing system.

[0011] Step 5: The central data processing system calculates the vehicle's travel time T = T2-T1 in the interval based on the timestamps T1 and T2 at the start and end of the interval, and calculates the vehicle's average speed V in the interval based on the interval length L. 平均 =L / T, and the speed limit value V in this section 限 Compare and determine whether the vehicle is speeding.

[0012] Step 6: If the average speed of the vehicle is not overspeeding, but the speed V detected by the first radar speed measuring device or the second radar speed measuring device at a certain moment in the interval is in (i=1n or 2n) exceeds the speed limit V 限 The central data processing system further analyzes the overspeed time point T in And the corresponding radar speed measuring device location information to determine the specific range of the vehicle speeding.

[0013] Step 7: The central data processing system transmits the vehicle's speed measurement results, including whether it is speeding, average speed, speeding time, speeding range and other information to the traffic management database for subsequent processing by the traffic management department, including penalty notices for speeding vehicles, data statistical analysis, etc.

[0014] As a further improvement of the present invention, the first radar speed measuring device and the second radar speed measuring device adopt millimeter wave radar technology.

[0015] As a further improvement of the present invention, the central data processing system uses an intelligent algorithm to process the radar speed measurement data, and can automatically filter out erroneous data caused by radar signal interference or other abnormal conditions.

[0016] As a further improvement of the present invention, in step three, when the vehicle changes lanes within the interval, the first radar speed measuring device and the second radar speed measuring device can accurately identify and continuously track the vehicle speed changes through the vehicle's driving trajectory characteristics and multi-lane monitoring functions, thereby ensuring the continuity and accuracy of the speed measurement data.

[0017] As a further improvement of the present invention, the first radar speed measuring device and the second radar speed measuring device have the same structure and function. The first radar speed measuring device includes a support frame, and a radar A and a radar B connected to the upper end of the support frame. The horizontal interval between the radar A and the radar B is 0.5 meters to 1 meter, and the emission angles of the radar A and the radar B are consistent.

[0018] As a further improvement of the present invention,

[0019] Radar A and radar B simultaneously measure the speed of passing vehicles, collect speed data and timestamps, and calculate the instantaneous speeds of radar A and radar B as V respectively. A and V B , the transmission angles of radar A and radar B are θ A and θ B ;

[0020] V A =V*cosθ A

[0021] V B =V*cosθ B

[0022] Calculate the vehicle's true speed V using the differential algorithm:

[0023] V=[VAcos(θ B )+V B cos(θ A )] / [cos(θ A )+cos(θ B )];

[0024] The actual speed V of the vehicle calculated by the differential algorithm is the vehicle speed measured by the first radar speed measuring device and the second radar speed measuring device.

[0025] Technical effects and advantages of the present invention:

[0026] The present invention can realize the full-process accurate monitoring of the vehicle's driving speed by setting up dual radar speed measuring devices at both ends of the expressway section and adopting the above-mentioned speed measuring method. It can not only accurately determine whether the average speed of the vehicle in the section exceeds the speed limit, but also accurately locate the speeding time point and section range of the vehicle in the section, effectively improving the accuracy of expressway section speed measurement and the effectiveness of law enforcement, and providing strong technical support for ensuring expressway traffic safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the system architecture of a dual radar speed measurement method for highway section speed measurement provided by an embodiment of the present application; DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0029] Example 1

[0030] See also Figure 1 In this embodiment, a dual radar speed measurement method for measuring speed in a highway section is provided, comprising:

[0031] The following steps are involved:

[0032] The dual radar speed measurement method for highway section speed measurement of the present invention comprises the following steps:

[0033] Step 1: A first radar speed measuring device and a second radar speed measuring device are respectively set at the starting point and the end point of the expressway section. Both radar speed measuring devices are connected to the central data processing system, and both the first radar speed measuring device and the second radar speed measuring device have the function of simultaneous speed measurement in multiple lanes.

[0034] Step 2: When the vehicle enters the starting point of the interval, the first radar speed measuring device automatically detects the vehicle information, including the license plate number and vehicle model information, and obtains the precise timestamp T1 of the vehicle entering the starting point, while measuring the initial speed V1 of the vehicle, and transmits this information to the central data processing system.

[0035] Step 3: During the driving process of the vehicle, the first radar speed measuring device and the second radar speed measuring device continuously track and monitor the vehicle, and the first radar speed measuring device measures the vehicle speed V again at a predetermined time interval △T 1n (n=1,2,3......), and measure the time T 1n and speed V 1n The second radar speed measuring device also measures the vehicle speed V at the same time interval △T. 2n , and measure the time T 2n and speed V 2n Transmitted to the central data processing system.

[0036] Step 4: When the vehicle reaches the end of the interval, the second radar speed measuring device detects the vehicle information and obtains the precise timestamp T2 of the vehicle's arrival at the end, and measures the vehicle's final speed V2, and transmits this information to the central data processing system.

[0037] Step 5: The central data processing system calculates the vehicle's travel time T = T2-T1 in the interval based on the timestamps T1 and T2 at the start and end of the interval, and calculates the vehicle's average speed V in the interval based on the interval length L. 平均 =L / T, and the speed limit value V in this section 限 Compare and determine whether the vehicle is speeding.

[0038] Step 6: If the average speed of the vehicle is not overspeeding, but the speed V detected by the first radar speed measuring device or the second radar speed measuring device at a certain moment in the interval is in (i=1n or 2n) exceeds the speed limit V 限 The central data processing system further analyzes the overspeed time point T in And the corresponding radar speed measuring device location information to determine the specific range of the vehicle speeding.

[0039] Step 7: The central data processing system transmits the vehicle's speed measurement results, including whether it is speeding, average speed, speeding time, speeding range and other information to the traffic management database, so that the traffic management department can carry out subsequent processing, such as penalty notices for speeding vehicles, data statistical analysis, etc.

[0040] The first radar speed measuring device and the second radar speed measuring device adopt millimeter wave radar technology, which has the characteristics of high precision and strong anti-interference ability, and can maintain relatively accurate speed measurement performance under adverse weather conditions (such as rain, snow, fog, etc.).

[0041] The central data processing system uses an intelligent algorithm to process the radar speed measurement data, which can automatically filter out erroneous data caused by radar signal interference or other abnormal conditions, thereby improving the reliability of the speed measurement results.

[0042] In step three, when the vehicle changes lanes within the interval, the first radar speed measuring device and the second radar speed measuring device can accurately identify and continuously track the vehicle speed changes through the vehicle's driving trajectory characteristics and multi-lane monitoring functions, thereby ensuring the continuity and accuracy of the speed measurement data.

[0043] The first radar speed measuring device and the second radar speed measuring device have the same structure and function. The first radar speed measuring device includes a support frame, and a radar A and a radar B connected to the upper end of the support frame. The horizontal interval between the radar A and the radar B is 0.5 meters to 1 meter, and the emission angles of the radar A and the radar B are consistent.

[0044] Radar A and radar B simultaneously measure the speed of passing vehicles, collect speed data and timestamps, and calculate the instantaneous speeds of radar A and radar B as V respectively. A and V B , the transmission angles of radar A and radar B are θA and θ B ;

[0045] V A =V*cosθ A

[0046] V B =V*cosθ B

[0047] Calculate the vehicle's true speed V using the differential algorithm:

[0048] V=[V A cos(θ B )+V B cos(θ A )] / [cos(θ A )+cos(θ B )];

[0049] The actual speed V of the vehicle calculated by the differential algorithm is the vehicle speed measured by the first radar speed measuring device and the second radar speed measuring device.

[0050] When the present invention is in use, a first radar speed measuring device is set at the starting point of the expressway section, and a second radar speed measuring device is set at the end point. Both of them establish communication connections with the central data processing system, and the central data processing system is also connected to the traffic management database.

[0051] When a vehicle enters the starting point of the expressway section, the first radar speed measuring device uses its multi-lane monitoring function to quickly detect the vehicle's license plate number, model and other information, and records the timestamp T1 when the vehicle enters the starting point. At the same time, it measures the vehicle's initial speed V1. These data are transmitted to the central data processing system in real time.

[0052] When the vehicle is traveling in the interval, the first radar speed measuring device and the second radar speed measuring device measure the speed of the vehicle at a predetermined time interval ΔT (for example, every 2 seconds). 13 , the first radar speed measuring device measures the vehicle speed V 13 , and T 13 and V 13 Transmitted to the central data processing system; at the same time, the second radar speed measuring device also at the corresponding time T 23 The vehicle speed V is measured 23 and transmit data.

[0053] When the vehicle reaches the end of the section, the second radar speed measuring device detects the vehicle information and obtains the timestamp T2 of reaching the end and the final speed V2, and transmits them to the central data processing system.

[0054] After receiving all the data, the central data processing system first calculates the vehicle's travel time in the interval T = T2-T1, and then calculates the average speed V according to the known interval length L. 平均 =L / T, and speed limit V 限 Compare and judge whether it is speeding. If the average speed is not speeding, but at a certain moment V in Overspeed, the central data processing system will calculate the time point T in The speed measurement results are transmitted to the traffic management database for subsequent processing by the traffic management department.

[0055] The electrical components appearing in this article are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device that controls a computer, etc. The specific implementation method of the present disclosure omits the detailed description of known functions and known components. To ensure the compatibility of the equipment, the operating methods used are consistent with the parameters of marketed equipment.

[0056] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A dual radar speed measurement method for measuring speed in highway sections, characterized in that: The following steps are involved: Step 1: A first radar speed measuring device and a second radar speed measuring device are respectively set at the starting point and the end point of the expressway section, both of which are connected to the central data processing system, and both of which have the function of multi-lane simultaneous speed measurement; Step 2: When a vehicle enters the starting point of the interval, the first radar speed measuring device automatically detects vehicle information, including license plate number and vehicle model information, obtains the precise timestamp T1 of the vehicle entering the starting point, and measures the initial speed V1 of the vehicle, and transmits this information to the central data processing system; Step 3: During the driving process of the vehicle, the first radar speed measuring device and the second radar speed measuring device continuously track and monitor the vehicle, and the first radar speed measuring device measures the vehicle speed V again at a predetermined time interval △T 1n (n=1,2,3......), and measure the time T 1n and speed V 1n The second radar speed measuring device also measures the vehicle speed V at the same time interval △T. 2n , and measure the time T 2n and speed V 2n Transmitted to a central data processing system; Step 4: When the vehicle reaches the end of the interval, the second radar speed measuring device detects the vehicle information and obtains the precise time stamp T2 of the vehicle reaching the end point, and measures the final speed V2 of the vehicle, and transmits this information to the central data processing system; Step 5: The central data processing system calculates the vehicle's travel time T = T2-T1 in the interval based on the timestamps T1 and T2 at the start and end of the interval, and calculates the vehicle's average speed V in the interval based on the interval length L. 平均 =L / T, and the speed limit value V in this section 限 Make a comparison to determine whether the vehicle is speeding; Step 6: If the average speed of the vehicle is not overspeeding, but the speed V detected by the first radar speed measuring device or the second radar speed measuring device at a certain moment in the interval is in (i=1n or 2n) exceeds the speed limit V 限 The central data processing system further analyzes the overspeed time point T in and the corresponding radar speed measuring device location information to determine the specific range of the vehicle speeding; Step 7: The central data processing system transmits the vehicle's speed measurement results, including whether it is speeding, average speed, speeding time, speeding range and other information to the traffic management database for subsequent processing by the traffic management department, including penalty notices for speeding vehicles and data statistical analysis.

2. The dual radar speed measurement method for highway section speed measurement according to claim 1, characterized in that: The first radar speed measuring device and the second radar speed measuring device adopt millimeter wave radar technology.

3. The dual radar speed measurement method for highway section speed measurement according to claim 1, characterized in that: The central data processing system uses an intelligent algorithm to process the radar speed measurement data and automatically filters out erroneous data caused by radar signal interference or other abnormal conditions.

4. The dual radar speed measurement method for highway section speed measurement according to claim 1, characterized in that: In step three, when the vehicle changes lanes within the interval, the first radar speed measuring device and the second radar speed measuring device can accurately identify and continuously track the vehicle speed changes through the vehicle's driving trajectory characteristics and multi-lane monitoring functions, ensuring the continuity and accuracy of the speed measurement data.

5. The dual radar speed measurement method for highway section speed measurement according to claim 1, characterized in that: The first radar speed measuring device and the second radar speed measuring device have the same structure and function. The first radar speed measuring device includes a support frame, and a radar A and a radar B connected to the upper end of the support frame. The horizontal interval between the radar A and the radar B is 0.5 meters to 1 meter, and the emission angles of the radar A and the radar B are consistent.

6. The dual radar speed measurement method for highway section speed measurement according to claim 5, characterized in that: Radar A and radar B simultaneously measure the speed of passing vehicles, collect speed data and timestamps, and calculate the instantaneous speeds of radar A and radar B as V respectively. A and V B , the transmission angles of radar A and radar B are θ A and θ B ; V A =V*cosθ A V B =V*cosθ B Calculate the vehicle's true speed V using the differential algorithm: V=[V A cos(θ B )+V B cos(θ A )] / [cos(θ A )+cos(θ B )]; The actual speed V of the vehicle calculated by the differential algorithm is the vehicle speed measured by the first radar speed measuring device and the second radar speed measuring device.

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