DEVICE MEASURING GRAVITATIONAL FIELDS Russian patent published in 2000 - IPC

FIELD: measurement of absolute values of non-diagonal components of tensor of gradient of gravitation. SUBSTANCE: device measuring gravitational fields has superconducting string fixed by both ends and forming closed superconducting circuit inductively coupled to two excitation solenoids. Displacement of string responding to gravitational field is detected by two converters of magnetic flux, each converter incorporating signal coil and two measurement coils. Pairs of measurement coils are located in two perpendicular planes to form two independent measurement channels. Two branches of each flux converter are balanced to convert amplitudes of asymmetric inherent vibrations of string only to output voltage. Output voltage of each channel is used to form distributed feedback current near string and in parallel to it. Effective time of attenuation and resonance frequency of first asymmetric inherent vibration of string can be regulated by adjustment of feedback current. EFFECT: increased sensitivity of device to gradients of gravitation. 22 cl, 2 dwg