A torsion balance device for measuring the gravity gradient

Based on the principle of torsion balance measuring gravity gradient, designed a torsion balance gravity gradiometer, consisting of a torsion balance system, an angle measurement system, an amplitude attenuation system, a turntable system, a vacuum container system. considering the stable time of torsion balance suspension system was too long, which had great impacted the efficiency of the gravity gradient measurement, designed an amplitude attenuation system in combination with PID control technology. Simulation results show that, the curvature and horizontal gravity gradient could be measured, the accuracy was as high as 0.5 E(1E = 1 × 10⁻⁹m/s²), and the limit efficiency of measuring a group of gravity gradients was better than an hour. (paper)