A kind of traffic vehicle detection method and system

Abstract

The application discloses a method and a system for detecting traffic vehicles. The method comprises the steps of: determining an object time length and an object maximum value signal when difference values between all object earth magnetic field real-time signals detected within a period of time and a background earth magnetic field value determined in advance are all greater than a first threshold value; determining an object deviation factor according to the object maximum value signal and the background earth magnetic field value; performing judgement for an adjacent lane interference condition when the object deviation factor is greater than a second threshold value, and performing judgement for a vehicle passing condition if the adjacent lane interference condition is not satisfied. The method of the present invention judges whether the object deviation factor and the object time length satisfy the adjacent lane interference condition on the premise that the object deviation factor is greater than the second threshold value, thereby reducing vehicle statistical bias caused by interference generated by extraneous non-vehicle factors or interference on an object lane due to vehicles on adjacent lanes, and improving accuracy of a statistic result.

Description

technical field [0001] The invention relates to the technical field of vehicle detection, in particular to a traffic vehicle detection method and system. Background technique [0002] At present, when detecting vehicles running on a lane, people usually use magnetic sensors to detect the vehicles. The ferromagnetic substance contained in the vehicle itself can change the geomagnetic field lines in the area where the vehicle is located. When the vehicle passes the monitoring position where the magnetic sensor is located, the magnetic sensor can detect the disturbance of the geomagnetic field signal caused by the vehicle passing the monitoring position. This enables the detection of vehicles traveling on the lane. [0003] However, when using a magnetic sensor to detect a vehicle on the track to be tested, when a vehicle on an adjacent lane passes near the monitoring position, it will interfere with the geomagnetic field signal detected on the track to be tested, thus making ...

AI Technical Summary

Problems solved by technology

[0003] However, when using a magnetic sensor to detect a vehicle on the track to be tested, when a vehicle on an adjacent lane passes near the monitoring position, it will interfere with the geomagnetic field signal detected on the track to be tested, thus making the track to be tested There is a serious deviation in the number of driving vehicles finally detected on the Internet, which affects the accuracy of the statistical results

In addition, interference signals generated by external non-vehicle factors can also have a negative impact on the statistical results, reducing the accuracy of the statistical results

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