Author:
Yan Fuxue,Sun Yishu,Zhang Yang,Lin Jun
Abstract
Abstract
Limited by urban road width and other factors, urban TEM detection can only use multiturn small loop as the transmitting coil. The traditional TEM transmitting circuit cannot transmit high frequency repetitive pulse for such large inductance coil. In order to solve this problem, a high transmission frequency circuit is proposed and built in this paper, which can clamp both the rising and falling edges of the emission current, and effectively improve the frequency. The repeated transmission frequency of 250 Hz for 0.73 mH coil at current of 30 A is realized. The circuit effectively improves the strong magnetic field excitation ability, which is of positive significance for the application of multiturn small loop TEM in urban environment.
Subject
Computer Science Applications,History,Education
Reference6 articles.
1. Weak coupling technology with non-coplanar bucking coil in a small-loop transient electromagnetic system;Chen;IEEE Transactions on Industrial Electronics,2022
2. Elimination of Mutual Inductance Effect for Small-Loop;Fu;TEM Devices Geophysics,2019
3. Opposing coils transient electromagnetic method for shallow subsurface detection Chinese;Xi;Journal of Geophysics Chinese Edition,2016
4. The influence of the induction of multi-turn coils for TEM on the detection of buried objects in underground mines;Yang;Geophysical and Geochemical Exploration,2007
5. Bipolar Steep Pulse Current Source for Highly Inductive Load;Zhu;IEEE Transactions on Power Electronics,2016