A Movable Cold Atom Absolute Gravity Acceleration Sensor

A gravitational acceleration and sensor technology, which is applied in instruments, scientific instruments, measuring gravitational fields, etc., to achieve the effect of easy integration, lightweight design, light weight, and low power consumption

Active Publication Date: 2019-02-19
杭州微伽量子科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the above-mentioned shortcomings and deficiencies of the existing cold atom absolute gravimeter, especially to solve the problems of miniaturization, integration and light weight of the cold atom absolute gravimeter, and to provide a compact structure, small volume and light weight , low power consumption and reliable absolute gravity sensor

Method used

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  • A Movable Cold Atom Absolute Gravity Acceleration Sensor
  • A Movable Cold Atom Absolute Gravity Acceleration Sensor
  • A Movable Cold Atom Absolute Gravity Acceleration Sensor

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Embodiment Construction

[0083] The cold atom absolute gravitational acceleration sensor of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0084] 1. Overall

[0085] see figure 1 , a kind of movable cold atom absolute gravitational acceleration sensor of the present invention, comprises vacuum unit 10, upper plate and its optical path unit 20, lower plate and its optical path unit 30, support unit 40, inclinometer 50, accelerometer 60, magnetic shield Unit 70 and passive vibration isolator unit 80; wherein, the vacuum unit 10 is fixed in the middle of the upper and lower plates, the upper and lower plates are connected by the support unit 40, the upper plate optical path unit 20 is docked with the vacuum unit 10 in free space, the inclinometer 50, the acceleration The meter 60 is placed on the lower plate, the magnetic shield unit 70 surrounds the upper and lower plates, and is placed on the passive vibration isolator unit 80;

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Abstract

The invention discloses a movable cold atom absolute gravitational acceleration sensor, and belongs to the absolute gravitational acceleration precision measuring field; the sensor comprises a vacuum unit, an optical path unit, a magnetic shielding unit, a passive vibration isolation platform, an accelerometer, and an inclinometer; the vacuum unit is formed by mainly bonding glass materials, and directly joints with the optical path unit in a free space; the magnetic shielding unit is used for reducing extraneous magnetic field influences on the absolute gravity measurement; the passive vibration isolation platform is used for suppressing ground vibration noise interferences; in addition, the accelerometer and the inclinometer are mainly used for actively compensating random vibrations and obtaining the vertical line, and assist the absolute gravity measurements. The features are that the vacuum unit is high in light through degree of freedom, small in size, light in weight, can be directly jointed with the optical path unit, so the measuring system is compact, stable, and strong in environment adaptability; the invention mainly solves the key technical problems that the cold atom absolute gravimeter is miniaturized, lightweighting and movable.

Description

technical field [0001] The invention belongs to the field of precise measurement of absolute acceleration of gravity, in particular to a small movable cold atom absolute acceleration of gravity sensor. technical background [0002] High-precision absolute gravity acceleration measurement has a very broad application prospect in the fields of geographic surveying and mapping, resource exploration, geological research, environmental monitoring, and homeland security. [0003] The earliest devices for measuring absolute gravitational acceleration were based on the principle of a simple pendulum, which had poor measurement repeatability and accuracy. The absolute gravimeter with the best performance is based on the laser interferometry method, which extracts the absolute gravitational acceleration by accurately measuring the position of the free-falling mirror as a function of time in a vacuum. The highest measurement accuracy of the absolute gravimeter based on laser interfero...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V7/14
Inventor 吴彬周寅程冰翁堪兴付志杰王肖隆林强
Owner 杭州微伽量子科技有限公司
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