Several test results on earthing-resistance-estimation instrument
Hitoshi Kijima · International Conference on Energy & Environment · 2008
Whenever earth construction work is done, the implanted number and depth of electrodes have to be estimated in order to obtain the required resistance value. We call this earth resistance estimation. Under conventional method of earth resistance estimation, special knowledge and manpower are needed. And also, measurement error of values of apparent resistivity can not be checked. Furthermore, vertical and horizontal resistivity sounding can not be done simultaneously. To overcome these problems, we have developed a new instrument. This instrument does not need an operation with any special knowledge, because the entire procedure is automatic. That is, it can automatically measure the values of apparent resistivity at the ground surface, analyze the resistivity and thickness of each layer of soil, and estimate earth resistance. The instrument effectively reduces the time and manpower needed for this type of estimation.