High-precision broadband gravimeter

Abstract

The invention discloses a high-precision broadband gravimeter, and relates to an earthquake precursor early warning and earth tide observation technology. According to the gravimeter, from bottom to top, a chassis unit is connected with a constant temperature unit, the constant temperature unit is internally provided with a supporting unit, and the supporting unit is provided with a capacitive displacement sensor, an elastic unit, a pendulum adjusting unit and a pendulum locking unit; the pendulum adjusting unit and the pendulum locking unit are connected with the elastic unit; the elastic unit is connected with the capacitive displacement sensor; the capacitive displacement sensor is used for measuring the up-and-down position change of a moving plate in the elastic unit; the elastic unitis a precision spring; and the constant temperature unit is a high-precision temperature control device. The constant temperature precision of the gravimeter is 0.0001 DEG C; the capacitive sensor has high enough precision, and the measurement precision is 0.1 nanometer; and the gravimeter adopts a reasonable thermal structure and good in sealing, so that the influence from the temperature and air pressure is small, and a good observation result can be obtained even when the gravimeter works in an observation room without temperature control.

Description

technical field [0001] The invention relates to earthquake precursor early warning and solid tide observation technology, in particular to a high-precision broadband gravimeter. Background technique [0002] The earliest high-precision broadband gravimeter capable of recording solid tides was the GS-type gravimeter invented by Graf in West Germany. It was widely used in Europe, America and China, but it was closed down due to Askania , the instrument was not reproduced; since then, Lacoste in the United States has designed the Lacoste ET type gravimeter, which is specially used to record solid tides; in the 1980s, my country developed a solid tide gravimeter by itself and produced and promoted it in China. These three kinds of gravimeters have different principles and are quite different, each with its own characteristics and advantages. But there is not much difference in accuracy. [0003] Since the accuracy of solid tides is about 1 microgal (μgal is about 10 -9 g), so ...

AI Technical Summary

Problems solved by technology

Successfully predicting the time, location, and magnitude of earthquakes is also a worldwide problem, and it is largely impossible to obtain comprehensive, accurate and quantitative information related to earthquake precursors

[0005] At present, there is no high-precision broadband gravimeter at home and abroad

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