Combination inertial sensor based on multi-component atom interferometer and measurement method of combination inertial sensor

Abstract

The invention discloses a combination inertial sensor based on a multi-component atom interferometer and a measurement method of the combination inertial sensor, and relates to the technical field of inertial measurement through atom interference. The combination inertial sensor comprises a first inertial-moment-sensitive cold atom interferometer, a second inertial-moment-sensitive cold atom interferometer and a vacuum communication cavity, wherein the first inertial-moment-sensitive cold atom interferometer and the second inertial-moment-sensitive cold atom interferometer are the same in structure. The vacuum communication cavity is communicated with an atom interference area of the first inertial-moment-sensitive cold atom interferometer and an atom interference area of the second inertial-moment-sensitive cold atom interferometer in the horizontal direction. According to the measurement method, multi-frequency laser light is used for simultaneously and independently manipulating two types of alkali metal atoms in the same physical unit, wherein the acceleration and the gravity gradient of one type of alkali metal atoms are measured through a three-pulse pi / 2-pi-pi / 2 Raman laser sequence, and the rotating speed of the other type of alkali metal atoms is measured through a four-pulse pi / 2-pi-pi-pi / 2 Raman laser sequence. Synchronous measurement of a plurality of inertial moments is realized through a simplex physical device at the same time, and the combination inertial sensor based on the multi-component atom interferometer and the measurement method of the combination inertial sensor can play an important role in inertial navigation, resource exploration, earthquake monitoring, physical geographical research and other fields.

Description

technical field [0001] The invention relates to the technical field of atomic interferometric inertial measurement, in particular to a combined inertial sensor based on a multi-component atomic interferometer and a measurement method thereof. Background technique [0002] Gravitational acceleration, gravity gradient and rotation rate are three common inertial physical quantities, and their high-precision measurement has important applications in the fields of metrology, surveying and mapping, geology, earthquake, national defense and resource exploration. For example, the distribution characteristics of mass and density below the surface can be obtained from the inversion of gravity acceleration and gravity gradient, so the gravity survey method plays a very important role in the fields of resource exploration, geological structure analysis and geophysical research. In geophysical research, fluctuations in the Earth's rotation rate can provide valuable information about the ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and to provide a combined inertial sensor based on a multi-component atomic interferometer and its measurement method, that is, to solve the multi-component inertial sensor including the gravity gradient that cannot be solved by the prior art. Simultaneous measurement of two inertial quantities can reduce the cost, complexity and space occupation of the measurement system while improving the measurement accuracy, and achieve the miniaturization and engineering of the physical system.

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