Development of a gravity measurement system based on fiber-optic gyroscope

Gravity measurement can realize the detection of matter based on density characteristics, and has been paid attention to in geophysics, physics, engineering and other fields. In this paper, we report the development of a gravity measurement system based on the fiber-optic gyroscope. A two-mass structure to sense the gradient of gravity field is designed and implemented. The structure converts the torque generated by the gradient into rotational motion, which is observed by a fiber-optic gyroscope. In a short-period experiment, the resolution of the gradient corresponds to 0.39 E @ 100 s. In a long-period observation, the noise level of the system can reach root 1.92 x 10-2 E/ Hz. The experimental results show that the fiber-optic gyroscope based gravity measurement system has a good prospect in gravimetry.