Development of superconducting gravimeter and observation of solid earth tide
The superconducting gravimeter is currently the relative gravimeter with the highest resolution and the best stability in the world,making it the most ideal observation instrument for studying the solid earth tide and long-term changes in gravity.This paper first explains the basic working principle of the superconducting gravimeter and then provides detailed information about the engineering prototype of the self-developed superconducting gravimeter and its research results.The engineering prototype consists of four main parts:a sensitive sensor unit,a"zero evaporation"cryogenic unit,an environmental disturbance control unit,and a data acquisition management unit.It is installed at the Wuhan Gravitation and Earth Tide National Observation and Research Station.The instrument's scale value was determined through comparison testing with an absolute gravimeter,and continuous observations were carried out for over three months.The observation results demonstrate that the instrument operates stably in the actual environment,capturing solid earth tide and seismic signals with high quality.Subsequently,a comprehensive evaluation of the superconducting gravimeter's performance was conducted.Key performance indicators such as noise level,direct range,Allen variance,and drift rate were analyzed in depth.Prospects for future work were outlined,aiming to achieve new technological breakthroughs in sensitivity improvement,environmental disturbance suppression,and long-term stability.These advancements are expected to promote the continuous progress and application expansion of superconducting gravimeters.
Superconducting gravimeterSolid earth tideCalibration of scale valuePerformance test
万方数据
维普
