摘要
本文对基于地感线圈的车辆通行自动检测控制系统进行了研究。由于线圈电感量的变化,使得由三点式LC振荡电路构成的检测电路输出的波形频率发生变化,再经过波形整形电路送入单片机,单片机检测到频率变化来控制电机运转。采用这种方法可以使得当有车辆经过时,挡车器可以自动抬升档杆。而且当杆下有车辆时可以及时停止落杆,防止砸中车辆。具有较高的实用价值和应用前景。
This paper researches the vehicle traffic automatic detection control system based on the sense coil. The change of coil inductance makes the three-LC oscillator circuit detection circuit output waveform frequency has changed, then through the waveform shaping circuit put into the MCU, and the MCU could detect the frequency changes to control the motor operation. This approach can make the block cars automatically lift lever when a vehicle passes, and stop the falling in time when there is a vehicle under it, prevent hit the vehicle. This studying has high practical value and application prospects.
出处
《价值工程》
2014年第5期42-43,共2页
Value Engineering
关键词
车辆检测
频率
振荡电路
单片机
vehicle detection
frequency
oscillation circuit
MCU
