Abstract
Resistivity meter is a useful instrument in geophysics for determining the characteristic of rock composition and underground material based on resistivity of the soil. In addition, this instrument can be performed to specify bedrock depth estimation of building foundations and to estimate there is geothermal potential. In this work, development of a digital resistivity meter based on microcontroller will be presented. The measurement was done by injecting current to the ground through two electrodes. The voltage is measured between two other electrodes corresponding to the configuration and distance of the electrode. The distance between two electrodes can be varied to get the resistance of each measurement point. The performance of digital resistivity meter had been confirmed which several features, including variable current injection, rapid measurement process, produced a big amount of data that brought a high accuracy. Measured results shown the developed system satisfy for the resistivity meter to determine the characteristics of soil and rock.
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