多匝重叠小回线装置的矿井瞬变电磁观测系统

Mine transient electromagnetic observation system of small multi-turn coincident configuration

采用物理实验对矿井瞬变电磁观测系统的发射功率、发射磁矩、关断时间随发射线圈匝数的变化关系以及关断时间、接收信号随接收线圈匝数的变化关系进行了定性研究.结果表明,发射功率随发射线圈匝数的增加而减小,发射磁矩随发射线圈匝数的增加而增加,但增加幅度较小;关断时间与发射线圈匝数近乎呈正比而与接收线圈无关;接收信号强度与接收线圈匝数呈正比关系;实验过程中采用的1-40匝不同匝数的接收线圈暂态过程近乎相同.

The changing laws of the transmitter power, the transmitted magnetic moment and the turn-off time with the turns of the transmitter loop and the changing laws of the turn-off time and the received signal with the turns of the receiver loop were studied by the experiment. The results indicate that the transmitted power decreases with the turns of the transmitter loop increasing while the transmitted magnetic moment increases, but the extent of the transmitted magnetic moment increased is less. The turn-off time is approximately in a direct proportion to the turns of the transmitter loop, and it is independent of the receiver loop. The received signal strength is direct proportion to the turns of the receiver loop. The self-transient courses of the different receiver loops from 1 to 40 turns are approximately coincident in the experiment.