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A double compensation method and device for vibration noise and wavefront distortion error of atomic interference gravimeter

A vibration noise, atomic interference technology, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., to achieve the effects of low cost, high compensation accuracy, and accurate acquisition

Active Publication Date: 2022-01-14
NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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Problems solved by technology

[0005] According to the survey, there is no technology or method that can effectively compensate the Raman optical wavefront distortion and mirror vibration noise at the same time.

Method used

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  • A double compensation method and device for vibration noise and wavefront distortion error of atomic interference gravimeter
  • A double compensation method and device for vibration noise and wavefront distortion error of atomic interference gravimeter
  • A double compensation method and device for vibration noise and wavefront distortion error of atomic interference gravimeter

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Embodiment Construction

[0052] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0053] Such as figure 1 , figure 2 and image 3 As shown, a kind of atomic interference gravimeter vibration noise and wavefront distortion error double compensation method of the present invention, the steps include:

[0054] Step S1: Static laser wavefront distortion measurement: For a specific atomic interferometric gravimeter system, measure the laser wavefront distortion distribution in the Raman optical path at a static state

[0055] Step S2: Measurement of dynamic vibration noise and laser wavefront distortion: use the inertial instrument to measure the vibration signal S(x, y, z, t) of the Raman optical mirror and perform filtering processing, and use the wavefront detector to measure the dynamic Raman in real time Laser Wavefront Distortion

[0056] Step S3: Real-time compensation of vibration noise and laser wavefr...

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Abstract

The present invention discloses a double compensation method and device for atomic interference gravimeter vibration noise and wavefront distortion error. Wavefront distortion distribution of a pair of Raman light interacted by atoms Step S2: Measurement of dynamic vibration noise and laser wavefront distortion: measure the vibration signal S(x, y, z, t) of the Raman optical mirror and perform filtering processing, and at the same time Real-time measurement of dynamic Raman laser wavefront distortion Step S3: Real-time compensation for vibration noise and laser wavefront distortion: use the adaptive PID feedback control algorithm to drive the deformation of the deformable mirror, and compensate for vibration noise and laser wavefront distortion in real time. The device is used to carry out the method described above. The invention has the advantages of improving measurement sensitivity, precision, stability, portability and the like.

Description

technical field [0001] The invention mainly relates to the technical field of high-precision absolute gravity measurement, in particular to a double compensation method and device for vibration noise and wavefront distortion error of an atomic interference gravimeter. Background technique [0002] High-precision absolute gravity information has broad application prospects in many fields such as basic scientific research, national defense construction, earth information monitoring, industrial applications, resource mining, and archaeology. The cold atom interferometer is a new generation of high-precision measuring instrument that uses atomic matter waves instead of light waves as the measurement medium. The measurement performance of the quantum absolute gravimeter centered on cold atom interference has surpassed the most advanced FG5X commercial laser interference absolute gravimeter , is the development direction of the next generation of high-precision absolute gravimeter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V7/00G01H9/00
CPCG01V7/00G01H9/00
Inventor 胡青青邝文俊万伏彬罗玉昆丛楠舒畅徐馥芳汪杰易腾
Owner NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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