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Traffic information single-coil field detection method

A technology of on-site detection and traffic information, which is applied in the field of intelligent transportation systems, can solve the problems of being unable to provide timely and accurate vehicle speed and vehicle information, and cannot obtain complete and complete vehicle information in time, and achieve the effect of solving technical problems

Active Publication Date: 2006-11-29
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

Method used

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  • Traffic information single-coil field detection method
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  • Traffic information single-coil field detection method

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Embodiment Construction

[0032] Combine below figure 2 The implementation and implementation effects of the two detection methods of the present invention are introduced in detail.

[0033] 1. Detection method of flow rate, vehicle type and speed of single coil

[0034] 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.

[0035] 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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Abstract

An on-site detecting method of traffic information by single coil includes detecting vehicle type as comparing time-varying drawing of coil inductance value at time of passing vehicle on coil buried underground with preset time-varying drawing model for various vehicle then using drawing match method to defect out type of vehicle, detecting vehicle speed as adding said coil width B on typical length L of this type of vehicle then dividing obtained figure by time P of said vehicle on said coil for obtaining vehicle speed V.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/042G08G1/017G08G1/052
Inventor 顾平
Owner 上海平可行智能科技有限公司
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