Method for detecting induction coil velocimeter

Abstract

The invention involves the detection method, the coil-gun flu detection method, including the following steps: put interference-coil into the two coils of the sense coil gun. The interference coil is connected with flu coil gun control device. The flu coil gun control device jams the two coils with interference signal respectively. The interval of the two signals is T; the distance between the two flu detected coils is S; S is divided by T to obtain simulation speed V; compare the simulation speed V and the speed detected by the coil-gun flu detect device to obtain the error of coil-gun flu detect device. The invention can test the coil-gun flu detect device accurately with high security, and can implement data representation and the same detection.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method of a ground induction coil speed measuring instrument. Background technique [0002] Using ground sense coils to detect vehicle speed is a relatively mature vehicle speed detection method in the world at present. It can obtain data such as current monitoring road traffic flow, occupancy rate, speed, etc., so as to judge road congestion, and use the field information release system Issue a warning etc. The basic principle of using the ground sense coil to detect the speed of the vehicle is: the ground sense coil speed measuring system consists of two parts, the detector module, the ground sense coil and the lead wire, and the driving energy (10-200KHZ) of the detector oscillation circuit passes through the ground sense coil. An electromagnetic field is generated, and the ground coil inductor forms a mediating circuit. The ground induction coil acts as a sensor. When a met...

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Problems solved by technology

[0005] ① Lack of safety: The ground induction coil speedometer is undoubtedly very dangerous and impractical to use a car to run at a higher speed according to different installation locations and different traffic conditions;

[0006] ②The accuracy is not high: due to the different slope conditions on the road, the wind direction and wind speed are changing at any time, so the car cannot drive at an accurate and constant speed, which makes the accuracy of the standard speed of the car not high, resulting in low detection accuracy ;

[0007] ③The data cannot be reproduced. Due to the existence of the above insurmountable conditions, the measurement data cannot be reproduced;

[0008] ④ It is impossible to perform same-point detection, because it is difficult to grasp the speed measuring device used to monitor the driving speed of the car during the driving process, such as radar speedometer or grating speedometer, and ground induction coil speedometer at the same time. Record data at one point, The speed measured by the ground induction coil speedometer and the speed measured by the speed measuring device are not the speed of a point;

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