现代电子技术2012，Vol.35Issue(14)：131-132,136,3.
基于磁感线圈的车流量检测的研究
Traffic flow detection based on magnetic coils
章冠 1李栋 1郭建强1
作者信息
- 1. 西南交通大学物理科学与技术学院,四川成都610031
- 折叠
摘要
Abstract
The ring coil taken as a sensor is laid on the highway to count the vehicles passed by. When vehicles run through above the coil, the variation of inductance L causes the frequency of the oscillating circuit changes. The frequency variation is detected by the chip on the phase-locked loop. The analog signal is converted to digital signal. The output signal produced by the phase-locked loop is transmitted to the microcomputer. It counts once when output electrical level changes from high to low, thus the traffic flow detection is completed. In the detection model testing, this system showed a fast detection rate and low false alarm rate. It has a certain anti-jamming capability.关键词
车流量检测/环形线圈/振荡电路/锁相环Key words
traffic flow detection/ ring coil/ oscillating circuit/ phase-locked loop分类
信息技术与安全科学引用本文复制引用
章冠,李栋,郭建强..基于磁感线圈的车流量检测的研究[J].现代电子技术,2012,35(14):131-132,136,3.
