High-precision micro-gravity acceleration measurement device and method based on quantum weak measurement

Abstract

The invention discloses a high-precision micro-gravity acceleration measurement device and a method based on a quantum weak measurement; the micro-gravity acceleration measurement device comprises a gravity sensing unit, a Sagnac interferometer, a laser emitting unit, a light receiving and detecting unit and a data processing unit, wherein coupling the gravity sensing unit with the Sagnac interferometer based on the quantum weak measurement, amplifying micro-displacement changes in different gravitational field environments of cantilever beam through deflection of polarized light in the Sagnacinterferometer, so that accurate measurement of gravitational acceleration micro changes is realized; the gravity acceleration measurement precision can reach 10<-10>, and the high-precision micro-gravity acceleration measurement device has very high measurement precision, can be applied to gravity assisted navigation in mine exploration, passive navigation technology, ocean gravity measurement,aviation gravity measurement and the like, and has an important application prospect.

Description

technical field [0001] The invention belongs to the technical field of quantum optics, relates to a gravitational acceleration measurement technology, in particular to a high-precision microgravity acceleration measurement device and method based on quantum weak measurement. Background technique [0002] The earth's gravitational field is the basic physical field of the earth's exterior and interior. Because the earth's topography and landforms are different everywhere, and the plate tectonics and geological structures are also varied in thousands of places, these factors have caused the irregular distribution of the earth's internal mass, resulting in the uneven distribution of the earth's gravitational field in space. How to accurately measure the distribution of the earth's gravitational field is of great significance in many fields (such as tidal fixation observation, crustal deformation observation and gravity exploration, etc.). For example, gravity-assisted navigatio...

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Problems solved by technology

It is not difficult to see that although the measurement efficiency of the relative gravimeter has been improved, there will be a "zero point drift" phenomenon, which may affect the measurement accuracy of the acceleration of gravity

[0004] Moreover, on the whole, my country started very late in the field of gravimeters, domestic gravity acceleration measurement devices mainly rely on imports, and high-precision gravimeters are still in a state of technical blockade

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