为了将激发极化法用于大面积快速普查找矿,我院物探教研室自一九七五年起开展了频率域激电法的方法研究和仪器研制。一九七七年提出了双频道幅频观测并开始研制双频激电仪,先后研制成三型样机,并进行了若干理论探讨、模型实验和初步推广工作。在兄弟单 In order to use the excitation polarization method for prospecting large-area rapid general survey, the Geophysical Exploration Department of our institute has conducted the method research and instrument development of frequency-domain method since 1975. In 1977, a dual-frequency amplitude-frequency observation was proposed and a dual-frequency electromechanical instrument was started. Three types of prototypes were successively developed and carried out a number of theoretical discussions, model experiments and preliminary promotion work. Single brother