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在地球物理的瞬变电磁测量工作中 ,由于工频干扰的影响 ,使得测量精度很大降低 ;在工频干扰严重的情况下 ,可造成有效信号的失真 ,给数据处理和解释带来麻烦。本文对工频干扰问题进行了研究 ,提出了一种软、硬件相结合的自适应滤波方法 ,对于消除工频干扰、提高测量精度是非常有效的。
In the geomagnetic transient electromagnetic measurement work, the measurement accuracy is greatly reduced due to the influence of the industrial frequency interference. In the case of serious industrial frequency interference, distortion of the effective signal can be caused, which brings trouble to data processing and interpretation. In this paper, the study of power frequency interference has been carried out. An adaptive filtering method based on hardware and software is put forward. It is very effective to eliminate power frequency interference and improve the measurement accuracy.