A high-precision electronic gravimeter suitable for geological survey

Abstract

The invention belongs to the field of geological exploration and especially relates to a high-precision electronic gravimeter suitable for geological exploration. The gravimeter comprises a body, a temperature control system, a data conversion and acquisition system and an inclination angle measurement and correction system, wherein the temperature control system, the data conversion and acquisition system and the inclination angle measurement and correction system are arranged in the body. Temperatures in constant-temperature chambers are more meticulously and accurately controlled and are enabled to be uniformly distributed by use of the temperature control system so that it is ensured that a quartz sensor can work in a stable constant-temperature environment; by use of the data conversion and acquisition system, minimal gravity change can be detected in a high-sensitivity and high-resolution mode so that high-precision gravity measurement of the gravimeter is guaranteed; and by use of the inclination angle measurement and correction system, when the angle of the gravimeter is inclined, the size of an inclination angle can be accurately measured in a high-precision mode so that angle adjustment can be timely performed on the gravimeter.

Description

technical field [0001] The invention belongs to the field of geological survey, in particular to a high-precision electronic gravimeter suitable for geological survey. Background technique [0002] A gravimeter is an instrument used to measure the acceleration of gravity. It can be divided into two types: an absolute gravimeter and a relative gravimeter. The former is used to measure the absolute value of the acceleration of gravity at one point, and the latter is used to measure the difference in the absolute acceleration of gravity between two points. Due to its high sensitivity, the gravimeter can feel small changes in gravity, and can be widely used in the measurement of the earth's gravity field, observation of solid tides, observation of crustal deformation, and gravity exploration. The quartz sensor inside the existing gravimeter is very sensitive to the external temperature, and it must be guaranteed to measure small gravity changes in a high-precision constant tempe...

AI Technical Summary

Problems solved by technology

The quartz sensor inside the existing gravimeter is very sensitive to the external temperature, and it must be guaranteed to measure small gravity changes in a high-precision constant temperature environment. However, the existing gravimeter is purely mechanical and is greatly affected by the ambient temperature; at the same time , when carrying out geological survey, high-precision gravity measurement is required, and the measurement resolution is very high, which must reach 10 -6 In order to meet the requirements of high-precision measurement, the existing gravimeter has a simple structure and cannot achieve high measurement accuracy; in addition, when conducting geological surveys, it is required to accurately adjust the position of the gravimeter to a horizontal state and accurately indicate the inclination angle , the inclination resolution requirement can reach 1 arc second, the existing gravimeter cannot meet the above requirements

In short, there is no system for precise control of the temperature of the gravimeter, accurate measurement of the inclination of the gravimeter, and accurate data measured by the gravimeter during geological surveys in China.

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