Recently, coil detector is applied in intelligent communication system popularly and is gradually applying to other fields.
近年来线圈检测在智能交通系统得到了广泛应用，且正在逐步推广应用到其他领域。
When vehicles passing ring coil detector, the interaction of vehicle body's substance and ring coil changes resonant frequency of the ring coil and forms a curve of frequency variation.
车辆通过环形线圈检测器时，车体物质与环形线圈相互作用改变了线圈的谐振频率，从而形成频率变化曲线。
Intelligent vehicle detector, based on the induction doughnut coil detecting principle, detects the information of vehicles traveling on the highways.
基于感应式环形线圈检测原理的智能车辆检测器检测公路上行驶的车辆信息。
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