音频大地电磁磁场传感器的研制
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals（2012）
Abstract
感应式磁场传感器一直是我国电磁法仪器发展的瓶颈,国外大地电磁法中测量大地磁场主要采用感应式磁场传感器.为此,根据音频大地电磁场源的特点,从感应式磁场传感器的基本原理出发,设计传感器的磁芯和线圈绕组结构以及线圈的谐振频率;另外,采用了磁通负反馈技术和频率补偿的方法,扩展了传感器的频带,得到了在1 Hz～9.8kHz频带范围内平坦度为±1.5 dB的灵敏度曲线,满足音频大地电磁探测的需要.
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Key words
Audio-frequency magnetotelluric sounding method,Magnetic field induction sensor,Magnetic flux negative feedback,Sensitivity
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