| 摘要 |
A system for powering and communicating with a mine or mine simulator, involving magnetic induction coupling between a powered search unit with a resonating primary inductance coil and a secondary inductance loop in the mine device. The current in the secondary loop is rectified in the mine device to provide dc power. The magnetic induction frequency can be in the range from 40 kHz to 1 MHz. The search unit can resonate sequentially or simultaneously at different frequencies, and rectification of the different frequencies in the mine device can provide information to the mine device. Feedback to the search unit can be by the mine device modulating the impedance of its secondary loop, for instance at an audio frequency 1/10th of the frequency of the induction coupling, and by detecting in the search unit the corresponding change in the reflected impedance. A mine device can be armed or disarmed, and report on its status when queried by the search unit coming sufficiently close to the mine device. A mine device can have a selectable active period during which it can kill a tank and provide a corresponding kill signal to the tank crew, be limited to only one kill, delay its arming to allow its planting or withdrawal of the search unit providing the arm signal, etc. A kill signal can be received with a 10 watt power input into a search unit on a tank, while maintaining a clearance of 5 feet from the ground.
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