An inductive loop detector is an electromagnetic communication or traditional traffic detection system which mostly uses buried coils and moving magnet to induce an electric current. A nd it is currently the largest amount of traffic detection device in the world. 地感，即是环形线圈式车辆检测器， 是传统的交通检测器， 多为埋设式感应线圈和金属物体来感应电流，也是 目前世界上用量最大的一种交通检测设备。 The embedded toroidal coil type vehicle detector is mainly composed of a regulated power supply, an oscillating coil, a logic circuit, a microprocessor, an interface and a driving circuit, a signal output circuit, an induction coil and so on . 埋设式环形线圈式车辆检测器主要由稳压电源，振荡线圈，逻辑电路、微处理器、接口及驱动电路，信号输出电路，感应线圈等组成。 A vehicle detector is based on the principle of electromagnetic induction. A group of (2) ring-shaped induction coils with a certain working current are buried in the roadbed section of the same lane. When the vehicle passes or stops in the annular buried coil, the vehicle itself cuts the magnetic flux line, causing the wire loop induc
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