A5029012332- Geophysics and Gravity Measurements
- GNSS positioning and interference
- Reservoir Engineering and Simulation Methods
- Seismic Waves and Analysis
- Numerical Methods and Algorithms
- Radio Astronomy Observations and Technology
Tsinghua University
2021-2023
Accurate absolute gravimeters are important instruments in applications, such as metrology, geophysics, and geological exploration. Vibration is one of the limiting factors that cause deterioration measurement accuracy, which includes trueness precision. The vibration correction method, a seismometer used to record vibration, provides an effective method deal with disturbances. theoretical analysis shows ultimate accuracy limited by inherent frequency performance seismometer. algorithm...
The absolute gravimeters used in gravity measurements have wide applications across disciplines. precision of a classical free-fall gravimeter is limited by the performance its dropping mechanism. mismatch between linear bearings and guideways can give rise to vibrations measurement lead errors results. To detect this problem, research develops diagnostic approach based on current analysis motor that drives Several chambers are tested under within 12 hours calculate uncertainty mean be...
Abstract The free-fall absolute gravimeter is commonly used for precise gravitational acceleration measurement. g value obtained through quadratic fitting of the position-time data pairs freely falling test mass. However, recoil vibrations are generated during release mass resulting from movement center chamber, and errors may arise these in measurement process. To solve vibration problem, previous researchers have developed compensation structure to achieve a basically stationary drop. In...