Traffic information single-coil field detection method
A technology for on-site detection and traffic information, applied in the field of intelligent transportation systems, can solve problems such as the inability to provide vehicle speed and model information in a timely and accurate manner, and the inability to obtain complete vehicle information in a timely manner, so as to achieve the effect of solving technical problems.
Active Publication Date: 2009-07-08
上海平可行智能科技有限公司
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Problems solved by technology
[0012] In view of the many shortcomings of the above-mentioned traffic information detection technology, the task of the present invention is to provide a traffic information single-coil on-site detection method, which solves the problem that the above-mentioned double-coil detection method cannot provide vehicle speed and vehicle type information in a timely and accurate manner, and cannot Issues with getting complete and complete vehicle information in a timely manner
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[0030] Combine below figure 2 The implementation and implementation effects of the two detection methods of the present invention are introduced in detail.
[0031] 1. Detection method of flow rate, vehicle type and speed of single coil
[0032] Connect the two lead wires of a coil buried in the superficial layer of the center of the lane to the vehicle detector in the roadside chassis, connect the output signal of the vehicle detector to the IPC, and the IPC is connected to the information center through the communication line.
[0033] Regardless of whether a single coil or a double coil is used, only one coil is needed for flow detection, and the width B of the coil is usually 2m. As long as the clear distance between adjacent vehicles is not less than the width of the coil, the flow can be accurately detected. Generally, the flow detection accuracy is excellent. at 90%. In order to further improve the accuracy of flow detection, the width of a coil selected by the presen...
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The invention relates to a method for on-site detection of a traffic information single coil. Only one coil is buried in each lane, and the vehicle type is detected first on site, and then the vehicle speed is detected. The characteristic that the variable graph is closely related to the shape of the metal components at the bottom of the vehicle, by comparing the time-varying graph of the inductance of the coil when the vehicle under test passes a coil with the pre-established time-varying graph models of various models, using the method of graph matching Detect the vehicle type; wherein the vehicle speed detection method is: add the typical length L of the vehicle type corresponding to the above-mentioned measured vehicle type to the known coil width B, and then divide it by the occupation of the above-mentioned measured vehicle on the coil Time P, that is, the measured travel speed V of the vehicle. The invention simplifies the double coil into a single coil, and detects dynamic traffic information: traffic conditions and traffic events at the first scene. Because the present invention adopts the above-mentioned technical measures, it better solves the technical problems in the world's intelligent traffic systems, and promotes the progress of the traffic information collection technology.
Description
technical field [0001] The invention belongs to the field of intelligent transportation systems, and only relates to a detection method of road traffic information, in particular to a detection method for collecting traffic information at a first site by using a single coil. Speed and traffic conditions and incidents of motor vehicle traffic flow. Background technique [0002] The practice of intelligent transportation systems in developed countries in the past two decades shows that the construction of intelligent transportation systems (ITS) is the only way to alleviate traffic congestion, reduce traffic accidents, and curb traffic pollution, and complete, timely and accurate traffic information is the key to building modern intelligent transportation systems. prerequisites. Traffic information can be divided into static and dynamic according to different needs. The so-called static information is the traffic survey data collected by time period, mainly including the t...
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IPC IPC(8): G08G1/042G08G1/017G08G1/052
Inventor 顾平
Owner 上海平可行智能科技有限公司