Earth specific resistance measurement - uses thin probe with two additional electrodes and employs source of known AC,申请号DE19782810358-传众专利搜索

Earth specific resistance measurement - uses thin probe with two additional electrodes and employs source of known AC

申请公布号：DE2810358(A1)

申请号：DE19782810358

申请日期：1978.03.10

申请公布日期：1978.09.14

申请人：

N.V. NEDERLANDSE GASUNIE

发明人：WOUDSTRA,GERRIT

分类号：G01N27/04;G01N33/24;G01R27/02;G01V3/06;(IPC1-7):01R27/20

主分类号：G01N27/04

摘要：<p>The method is for measuring the specific resistance of the top layer of the ground using a specially designed thin probe and two additional separate electrodes (6, 7). At least two thirds of the probe are covered with an insulating coat and the non-insulated metallic portion at the lower end is at least 15 cm long. The conducting portion of the probe is a tube with a max. diameter of 10 mm. A known alternating current (i) is passed between the first electrode (6) and the probe using the source (8) and a meter (9). The voltage (E) between the nearer electrode (7) and the probe is measured using the meter (10). The specific resistance (rho) is given by rho = f.E/i where f is a constant for the probe, and E and i are the a.c. voltage and current respectively.</p>