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美国华盛顿州里奇兰市西北太平洋实验室为美国能源部研制成功一种特殊用途的感应式电导率探测仪,可在地热勘探中用来测量高温(250℃)高压(600磅/英寸_2,约合42公斤/厘米_2)下咸水电导率。该仪器的基本原理与海洋调查用的感应式电导率探测器非常相似,也是用一对磁环作敏感元件,以被测咸水构成环路。数学模拟分析结果表明,作为电流变换器的磁环线圈的输出电流i_2与被测咸水的电导率成正比。所设计的电子线路使测量结果不受磁环
Northwest Pacific Laboratory, Richland, Washington, USA Successfully Developed for the U.S. Department of Energy A special purpose inductive conductivity detector that can be used in geothermal exploration to measure high temperature (250 ° C) high pressure (600 psi) , About 42 kg / cm 2) under salt water conductivity. The basic principle of this instrument is very similar to the inductive conductivity detector used in ocean investigation. A pair of magnetic rings are also used as the sensing element to form the loop with the measured salt water. The result of mathematical simulation shows that the output current i_2 of the magnetic loop as the current transformer is proportional to the conductivity of the measured salt water. The design of the electronic circuit to measure the results from the ring