Earth tide observation device based on electrostatic force balance feedback control

Abstract

The invention discloses an earth tide observation device based on electrostatic force balance feedback control, which relates to the technology of early warning and observation of earthquake precursors. The device of the invention comprises a main body, a capacitance detection circuit, a PID control circuit, an electrostatic force driving circuit, a voltage feed-in circuit and a power supply, wherein the main body, the capacitance detection circuit, the PID control circuit, the electrostatic force driving circuit and the main body are sequentially connected to form a closed loop system, the voltage feed-in circuit is connected with the main body, inputted earth tide signals are detected, and outputted earth tide signals are acquired. The electrostatic force is used as an instrument for force balance feedback, the observation frequency band is wide, the dynamic range is large, and the linearity is good; variation of the earth tide can be reflected, and high frequency variation of crustal deformation can also be reflected; the gap that earthquake observation in the country has no high frequency instrument, and useful information related to the earthquake precursors based on features of the high frequency observation is expected to be found; and the device of the invention is applicable to early warning of the earthquake precursors.

Description

technical field [0001] The invention relates to an earthquake precursor early warning observation technology, in particular to a solid tide observation device based on electrostatic force balance feedback control. Background technique [0002] Prediction of earthquake precursors is one of the major topics in earthquake research. Successfully predicting the time, place, and size of earthquakes is also a worldwide problem, largely due to the inability to obtain comprehensive, accurate and quantitative information related to earthquake precursors. Crustal deformation measurement is one of the main means for earthquake precursors to predict earthquakes. The physical concept is clear, directly reflects the changes in the crust, and explains the stress and deformation of the crust and the process and end of earthquakes caused by faults. [0003] After entering the 21st century, the country has higher and more specific requirements for earthquake precursor instruments. Among the p...

AI Technical Summary

Problems solved by technology

However, studies have shown that the change or anomaly of solid tides can only serve the mid-term and long-term earthquake prediction for the time being

After the Wenchuan Earthquake in 2008, researchers found that ultra-wideband seismometers can monitor high-frequency information, and it is possible to observe imminent earthquake information (Zhang Yan, Anomalies before the Wenchuan Earthquake Observed by Ultra-wideband Seismometers, 2011 , geodesy and geodynamics) Since the existing pendulum instrument is an open-loop instrument, it is limited by the natural period of the pendulum length, and it is almost impossible to increase the observation frequency to more than 1Hz

Images