基于平行螺纹电极的溶液电容影响因素的室内实验研究  

A laboratory experimental study on the influencing factors in the solution capacitance

作　　者：杨新星[1] 周启友[1] 杨磊[1] 王刚[1] 雷明[1] 

机构地区：[1]南京大学地球科学与工程学院水科学系,南京210093

出　　处：《工程勘察》2013年第3期81-85,共5页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金项目(40771038)(41172208)资助

摘　　要：为了探讨采用平行螺纹电极测得的溶液电容的可靠性,本文利用唯一变量法着重探讨了温度、电极间距、测定频率和溶液浓度对所测电容的影响。结果发现,溶液电容随温度升高而增大,随温度降低而减小;电容与平行螺纹电极间距的1/2次方左右成反比;电容在一定的测定频率下随溶液浓度的增加而线性增加;电容与频率的双对数呈近似线性递减的关系。这些研究成果为电容成像方法的建立以及电容参数与高密度电阻率勘探方法的耦合应用提供了科学依据,具有十分重要的意义。In an attempt to discuss the reliability of the capacitance of NaCl solutions using parallel screw thread electrodes, we carry out a pilot study on the effects of factors of temperature, electrode interval, measuring frequency and solution concentration by controlling variable method. According to the results, the capacitance of NaCl solutions will increase with the temperature rising, and decrease with the temperature decreasing; however, the capacitance of solutions is inversely proportional to the square root of the electrode interval, and the capacitance increases linearly with the concentration increasing. The capacitance and the frequency on the double logarithmic diagram show a relationship of an approximate linearly decreasing. The results of research provide evidence for the establishment of the capacitance tomography method and the coupling applications with high density resistivity method, which has a very important significance.

关 键 词：电容 介电常数 NACL溶液 螺纹电极 电法勘探 

分 类 号：P631.322[天文地球—地质矿产勘探]