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这是一种检测大件金属物体存在的检测电路,其具体应用之一是检测有无汽车通过。方法是:将线圈L1埋设在地面以下,若上面有车辆通过,则其感应电流产生的不平衡信号使检测电路触发,可发出告誓或驱动其它执行机构。L1用26号漆包线在1.2米的框架上绕50圈,埋深至少为0.2米,并用屏蔽导线连在本电路。电路由振荡器、马克斯威尔电桥、放大器、
This is a detection of large metal objects exist in the detection circuit, one of its specific application is to detect the presence or absence of cars. Method is: Buried coil L1 below the ground, if above the vehicle through, the induced current imbalance signal generated by the detection circuit trigger, may issue a vow or drive other implementing agencies. L1 with 26 enameled wire in a 1.2 m frame around 50 laps, at least 0.2 meters depth, and with a shield wire connected to the circuit. The circuit consists of an oscillator, Maxwell bridge, amplifier,