Double radar speed measurement method for expressway section speed measurement

Abstract

The present application relates to the field of traffic speed measurement, in particular to a double radar speed measurement method for expressway section speed measurement, comprising setting a first radar speed measurement device and a second radar speed measurement device at the starting point and the ending point of the expressway section respectively, both of the radar speed measurement devices are connected with a central data processing system, and both of the first radar speed measurement device and the second radar speed measurement device have the function of simultaneously measuring the speed of multiple lanes. By setting double radar speed measurement devices at both ends of the expressway section and using the above speed measurement method, the present application can realize the whole-process accurate monitoring of the speed of vehicles, not only can accurately judge whether the average speed of vehicles in the section is overspeed, but also can accurately locate the overspeed time point and the section range of vehicles in the section, effectively improve the accuracy of expressway section speed measurement and the effectiveness of law enforcement, and provide strong technical support for guaranteeing the traffic safety of expressway.

Description

Technical Field

[0001] This invention relates to the field of traffic speed measurement technology, and more specifically to a dual-radar speed measurement method for highway section speed measurement. Background Technology

[0002] Highway section speed measurement is an effective traffic management method for monitoring vehicle speed and curbing speeding violations. Traditional section speed measurement systems mainly calculate the average speed based on the time it takes for a vehicle to be photographed at the beginning and end of the section. However, this method has some limitations. For example, it is difficult to accurately identify the specific section and time point of a vehicle's speeding behavior when it changes speed within the section (such as speeding first and then slowing down), making it difficult to provide timely and effective warnings and enforcement for speeding behavior.

[0003] Therefore, those skilled in the art have provided a dual-radar speed measurement method for highway section speed measurement to solve the problems mentioned in the background art. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a dual-radar speed measurement method for highway section speed measurement, thereby resolving the problems existing in current section speed measurement technologies and achieving more accurate monitoring of vehicle speed within a section and effective identification and processing of speeding behavior.

[0005] Includes the following steps:

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

[0007] Step 1: Install a first radar speed measuring device and a second radar speed measuring device at the beginning and end of the highway section, respectively. 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 of multiple lanes.

[0008] Step 2: When a vehicle enters the starting point of the section, the first radar speed measuring device automatically detects vehicle information, including license plate number and vehicle type information, and obtains the precise timestamp T1 of the vehicle entering the starting point. At the same time, it measures the initial speed V1 of the vehicle and transmits this information to the central data processing system.

[0009] Step 3: During the vehicle's operation, the first and second radar speed measuring devices continuously track and monitor the vehicle. The first radar speed measuring device measures the vehicle speed V again every predetermined time interval △T. 1n (n = 1, 2, 3 ...), and the measurement time T 1n and speed V 1n The data is transmitted to the central data processing system; the second radar speed measuring device also measures the vehicle speed V at the same time interval ΔT.2n and the measurement time T 2n and speed V 2n It is transmitted to the central data processing system.

[0010] Step 4: When the vehicle reaches the end of the section, the second radar speed measuring device detects the vehicle information and obtains the precise timestamp T2 of the vehicle's arrival at the end of the section. At the same time, it 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 within the interval (T = T2 - T1) based on the vehicle's timestamps T1 and T2 at the start and end points of the interval, and calculates the vehicle's average speed (V) within the interval based on the interval length L. 平均 = L / T, and the speed limit value V for that section. 限 The comparison is used to determine whether the vehicle is speeding.

[0012] Step Six: If the vehicle's average speed is not exceeding the speed limit, but the speed V detected by the first or second radar speed measuring device at a certain moment within the section... in (i = 1n or 2n) exceeds the speed limit value V 限 The central data processing system then further analyzes the overspeed time point T. in In addition to the location information of the corresponding radar speed measuring device, the specific range of the vehicle's speeding is determined.

[0013] Step 7: The central data processing system transmits the vehicle speed measurement results, including whether the vehicle is speeding, the average speed, the time of the speeding, and the speeding range, to the traffic management database so that the traffic management department can carry out subsequent processing, such as issuing penalty notices to speeding vehicles and conducting data statistical analysis.

[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 intelligent algorithms to process radar speed measurement data, which 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 section, the first radar speed measuring device and the second radar speed measuring device can accurately identify and continuously track changes in vehicle speed through the vehicle's driving trajectory characteristics and multi-lane monitoring function, ensuring the continuity and accuracy of 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 radar A and radar B connected to the upper end of the support frame. The horizontal distance between radar A and radar B is 0.5 meters to 1 meter, and the emission angles of radar A and radar B are the same.

[0018] As a further improvement of the present invention

[0019] Radar A and Radar B simultaneously measure the speed of passing vehicles, collecting speed data and timestamps, and calculating the instantaneous speeds V of Radar A and Radar B respectively. A and V B The emission angles of radar A and radar B are θ respectively. A and θ B ;

[0020] V A =V*cosθ A

[0021] V B =V*cosθ B

[0022] The vehicle's true speed V is calculated using a differential algorithm:

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

[0024] The vehicle's true speed V is calculated using a differential algorithm, which is the vehicle speed measured by the first radar speed measuring device and the second radar speed measuring device.

[0025] The technical effects and advantages of this invention are as follows:

[0026] This invention, by setting up dual radar speed measuring devices at both ends of a highway section and employing the aforementioned speed measuring method, enables precise monitoring of vehicle speed throughout the entire journey. It can not only accurately determine whether the average speed of a vehicle exceeds the speed limit within the section, but also precisely locate the time point and range of the vehicle's speeding within the section. This effectively improves the accuracy of highway section speed measurement and the effectiveness of law enforcement, providing strong technical support for ensuring highway traffic safety. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the system architecture of the dual-radar speed measurement method for highway section speed measurement provided in the embodiments of this application; Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0029] Example 1

[0030] Please see Figure 1 This embodiment provides a dual-radar speed measurement method for highway section speed measurement, including...

[0031] Includes the following steps:

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

[0033] Step 1: Install a first radar speed measuring device and a second radar speed measuring device at the beginning and end of the highway section, respectively. 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 of multiple lanes.

[0034] Step 2: When a vehicle enters the starting point of the section, the first radar speed measuring device automatically detects vehicle information, including license plate number and vehicle type information, and obtains the precise timestamp T1 of the vehicle entering the starting point. At the same time, it measures the initial speed V1 of the vehicle and transmits this information to the central data processing system.

[0035] Step 3: During the vehicle's operation, the first and second radar speed measuring devices continuously track and monitor the vehicle. The first radar speed measuring device measures the vehicle speed V again every predetermined time interval △T. 1n (n = 1, 2, 3 ...), and the measurement time T 1n and speed V 1n The data is transmitted to the central data processing system; the second radar speed measuring device also measures the vehicle speed V at the same time interval ΔT. 2n and the measurement time T 2n and speed V 2n It is transmitted to the central data processing system.

[0036] Step 4: When the vehicle reaches the end of the section, the second radar speed measuring device detects the vehicle information and obtains the precise timestamp T2 of the vehicle's arrival at the end of the section. At the same time, it 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 within the interval (T = T2 - T1) based on the vehicle's timestamps T1 and T2 at the start and end points of the interval, and calculates the vehicle's average speed (V) within the interval based on the interval length L. 平均 = L / T, and the speed limit value V for that section. 限 The comparison is used to determine whether the vehicle is speeding.

[0038] Step Six: If the vehicle's average speed is not exceeding the speed limit, but the speed V detected by the first or second radar speed measuring device at a certain moment within the section... in (i = 1n or 2n) exceeds the speed limit value V 限 The central data processing system then further analyzes the overspeed time point T. in In addition to the location information of the corresponding radar speed measuring device, the specific range of the vehicle's speeding is determined.

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

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

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

[0042] In step three, when a vehicle changes lanes within the section, the first radar speed measuring device and the second radar speed measuring device can accurately identify and continuously track changes in vehicle speed through the vehicle's driving trajectory characteristics and multi-lane monitoring function, ensuring the continuity and accuracy of 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 radar A and radar B connected to the upper end of the support frame. The horizontal distance between radar A and radar B is 0.5 meters to 1 meter, and the emission angles of radar A and radar B are the same.

[0044] Radar A and Radar B simultaneously measure the speed of passing vehicles, collecting speed data and timestamps, and calculating the instantaneous speeds V of Radar A and Radar B respectively. A and V B The emission angles of radar A and radar B are θ respectively.A and θ B ;

[0045] V A =V*cosθ A

[0046] V B =V*cosθ B

[0047] The vehicle's true speed V is calculated using a differential algorithm:

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

[0049] The vehicle's true speed V is calculated using a differential algorithm, which is the vehicle speed measured by the first radar speed measuring device and the second radar speed measuring device.

[0050] In use, the invention involves setting up a first radar speed measuring device at the starting point of a highway section and a second radar speed measuring device at the ending point. Both devices are connected to a central data processing system, which is also connected to a traffic management database.

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

[0052] While the vehicle is traveling within the section, the first radar speed measuring device and the second radar speed measuring device measure the vehicle's speed at predetermined time intervals ΔT (e.g., every 2 seconds). Assume that at a certain moment T... 13 The first radar speed measuring device measured the vehicle speed V. 13 and T 13 and V 13 The data is transmitted to the central data processing system; simultaneously, the second radar speed measuring device also transmits the data at the corresponding time point T. 23 The vehicle speed V was 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, which is then transmitted to the central data processing system.

[0054] After receiving all the data, the central data processing system first calculates the vehicle's travel time within the interval, T = T2 - T1, and then calculates the average speed V based on the known interval length L. 平均 =L / T, and the speed limit V 限 Compare and determine if speeding is exceeded. If the average speed is not exceeded, but at a certain moment V... in If the speeding occurs, the central data processing system will determine the time point T. in The speeding range is determined by the location of the corresponding radar device, and the speed measurement results are finally transmitted to the traffic management database for further processing by the traffic management department.

[0055] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer for control. The detailed description of known functions and components is omitted in the specific implementation of this disclosure. To ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0056] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A dual-radar speed measurement method for highway section speed measurement, characterized in that, Includes the following steps: Step 1: Install a first radar speed measuring device and a second radar speed measuring device at the beginning and end of the highway section, respectively. 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 measuring of multiple lanes. Step 2: When a vehicle enters the starting point of the section, the first radar speed measuring device automatically detects vehicle information, including license plate number and vehicle model information, and obtains the precise timestamp T1 of the vehicle entering the starting point. At the same time, it measures the initial speed V1 of the vehicle and transmits this information to the central data processing system. Step 3: During the vehicle's operation, the first and second radar speed measuring devices continuously track and monitor the vehicle. The first radar speed measuring device measures the vehicle speed V again every predetermined time interval △T. 1n n = 1, 2, 3..., and the measurement time T 1n and speed V 1n The data is transmitted to the central data processing system; the second radar speed measuring device also measures the vehicle speed V at the same time interval ΔT. 2n and the measurement time T 2n and speed V 2n Transmitted to the central data processing system; Step 4: When the vehicle reaches the end of the section, the second radar speed measuring device detects the vehicle information and obtains the precise timestamp T2 of the vehicle's arrival at the end of the section. At the same time, it measures the vehicle's final speed V2 and transmits this information to the central data processing system. Step 5: The central data processing system calculates the vehicle's travel time within the interval (T = T2 - T1) based on the vehicle's timestamps T1 and T2 at the start and end points of the interval, and calculates the vehicle's average speed (V) within the interval based on the interval length L. 平均 = L / T, and the speed limit value V for that section. 限 Compare the vehicles to determine if they are speeding; Step Six: If the vehicle's average speed is not exceeding the speed limit, but the speed V detected by the first or second radar speed measuring device at a certain moment within the section... in Exceeding the speed limit V 限 If i = 1 / n or 2 / n, 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 speed measurement results, including whether the vehicle is speeding, the average speed, the time of the speeding, and the range of the speeding interval, to the traffic management database so that the traffic management department can carry out subsequent processing, including issuing penalty notices to speeding vehicles and conducting data statistical analysis.

2. The dual-radar speed measurement method for highway section speed measurement according to claim 1, characterized in that, The first and second radar speed measuring devices employ 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 intelligent algorithms to process radar speed measurement data and automatically filters out erroneous data caused by radar signal interference or other abnormalities.

4. The dual-radar speed measurement method for highway section speed measurement according to claim 1, characterized in that, In step three, when a vehicle changes lanes within the section, the first radar speed measuring device and the second radar speed measuring device can accurately identify and continuously track changes in vehicle speed through the vehicle's driving trajectory characteristics and multi-lane monitoring function, ensuring the continuity and accuracy of 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 radar A and radar B connected to the upper end of the support frame. The horizontal distance between radar A and radar B is 0.5 meters to 1 meter, and the emission angles of radar A and radar B are the same.

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, collecting speed data and timestamps, and calculating the instantaneous speeds V of Radar A and Radar B respectively. A and V B The emission angles of radar A and radar B are θ respectively. A and θ B ; V A =V*cosθ A V B =V*cosθ B The vehicle's true speed V is calculated using a differential algorithm: V=[V A cos(θ B )+V B cos(θ A )] / [cos(θ A )+cos(θ B )]; The vehicle's true speed V is calculated using a differential algorithm, which is the vehicle speed measured by the first and second radar speed measuring devices.

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