瞬变电磁法中发射机关断时间的影响研究

Study of the effect of transmitter turn off time on transient electromagnetic method.

近年来 ,国内外许多文献讨论了瞬变电磁法中发射机关断时间的影响 ,文章从斜坡关断响应的推导 ,以及如何减小关断时间 ,使之接近理想阶跃函数两个方面入手 ,讨论了如何利用理想阶跃函数近似模拟斜坡关断 ,尽量减小关断时间 。

The effect of transmitter turn off time in transient electromagnetic method (TEM) is discussed in many papers both at home and abroad in recent years. The paper focuses on deduction of slope turn off respone and how to reduce transmitter turn off time so as to approximate to ideal step function. How to make use of the ideal step function to simulate the slope turn off function is discussed. The interpretation of TEM data is more practical by reducing transmitter turn off time as small as possible.