System of automatic realization of measurements of the resistivity in geophysical prospection with continuous current. (Machine-translation by Google Translate, not legally binding)

摘要

System of automatic realization of measurements of the resistivity in geophysical prospection with continuous current, characterized by carrying out the measurement of resistivity (see formula), by means of an additional amplifier constituted by an operational amplifier mounted as a "follower with gain" whose gain is inversely proportional to i, achieving this effect based on the fact that since the gain of the operational amplifier is set up as a "follower with gain "inversely proportional to one of two resistors connected in series, these two resistors are made to be the two parts of a potentiometer, and causing this potentiometer to be governed by a servomechanism circuit that provides a proportional rotation to i, also being characterized the division provided by the additional amplifier is between dividing by one and dividing by ten maximum. (Machine-translation by Google Translate, not legally binding)