UN DISPOSITIVO DE MEDICION PORTATIL ADECUADO PARA MEDIR EL ANGULO QUE FORMA EL VECTOR DEL CAMPO ELECTROMAGNETICO TOTAL CON EL PLANO HORIZONTAL TANGENTE A LA SUPERFICIE DE LA TIERRA EN EL PUNTO DE MEDICION

摘要

A measurement apparatus which is used in determining the angle which the earth's total electromagnetic field vector makes with the horizontal plane tangent to the surface of the earth at a given location, which angle is known as the "tipper". The apparatus may be used for reconnaissance surveys by taking measurements along roads and other public areas to determine locations of high "tipper" that in turn relate to subsurface features which may indicate the presence of hydrocarbon deposits. The apparatus includes two detecting coils 11a, 11b which are mounted at right angles in the shape of an inverted tee. The coils are designed so as to be sensitive to changes of as little as 0.01 gammas in the earth's electromagnetic field at a frequency of 8 Hz. Electronic circuits having a special transfer function are provided to amplify the signals from the coils. The amplified signals are converted to dc pulses which are stored in output capacitors for readout with a voltmeter.