基于MCU芯片的车流检测装置

Vehicle flux detector based on MCU chip

将线圈埋置于地面下10～20mm处,电感线圈接LC振荡器,振荡信号接在MCUP87LPC764的定时计数器的输入端,由P87LPC764检测振荡频率。当机动车辆通过线圈部分时,线圈电感量发生变化,振荡器的频率发生变化,通过检测振荡频率的变化量,可以判断是否有车辆通过。实际运行表明,检测装置工作可靠,没有漏检或多报现象。

Inductance winding was covered 10～20*#mm under the ground.Inductance winding was linked with the LC oscillator.The output signal was connected to the input port of timer/counter in the P87LPC764.Then the MCU P87LPC764 can acquire the oscillation frequency.The inductance coil will vary when motor vehicles passing over the winding.Then the oscillator frequency will be changed.The passing vehicles can be detected by the change of oscillation frequency.The detector has better adaptability and reliable performance.