A New Measurement Method for Resonance Frequency of Fiber Optic Interferometric Vibration Detector

Chen, Jiandong; Yang, Yue; Pan, Xiaoju; Wang, Zhanghai; Zhang, Zili; Ge, Huiliang

doi:10.1109/icmic48233.2019.9068532

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Results show that the application of vibration correction improves the resolution of gravity measurement from 37.27 µGal@144 s to 6.236 µGal@144 s, achieving a factor of 5.98 enhancement. University of Science and Technology of China employs a three dimensional vibration correction method [22]. They perform pre-processing on the three-dimensional vibration signal to remove high frequency noise and correct for distortions.…”

Section: Introductionmentioning

confidence: 99%

A vibration correction system for cold atom gravimeter

Guo,

Bai,

et al. 2023

Meas. Sci. Technol.

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Cold atom gravimeters are used to measure the absolute value of the gravitational acceleration. To mitigate the influence of seismic noise on the mirror, a vibration correction system is used. A commercial seismometer CMG-3ESPC is employed to measure the mirror vibration. The transfer function between the mirror vibration and the output of the seismometer is regarded as a proportional element with a time delay. The best proportional element and the best time delay are obtained by minimizing the standard deviation of the fitting residuals of the interference fringe α − P with vibration correction. This system not only exhibits excellent environmental adaptability but also eliminates the need for rough estimation of local gravitational acceleration during the vibration correction process. The system was built on the homemade cold atom gravimeter to carry out experiments in the laboratory. Compared with the measurement results without vibration correction, the standard deviation of the gravity measurement results was reduced from 120.5 μ Gal to 4.2 μ Gal, resulting in a significant reduction by a factor of 28.7. Meanwhile, its sensitivity was significantly improved from 330.8 μ Gal Hz − 1 to 18.0 μ Gal Hz − 1 by performing vibration correction. In the future, this system is expected to carry out comprehensive verification experiments in more complex noisy environments.

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Section: Introductionmentioning

confidence: 99%

A vibration correction system for cold atom gravimeter

Guo,

Bai,

et al. 2023

Meas. Sci. Technol.

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Eliminating the influence of modulation depth by a laser interference double detection system

tong¹,

kunmiao²,

Wang³

et al. 2022

Appl. Opt.

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We propose a method of combining a double optical path detection system with a phase generation carrier arctangent algorithm. The feasibility of eliminating the influence of modulation depth by the double optical path detection vibration measurement system is verified by simulation and experiment. Results show that the average total harmonic distortion of the single frequency signal is 1%, and the signal-to-noise ratio of the speech signal is improved by an average of 5.6 dB. Therefore, the double optical path detection system can eliminate the influence of modulation depth, avoid nonlinear distortion, and improve the detection performance of the system.

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A New Measurement Method for Resonance Frequency of Fiber Optic Interferometric Vibration Detector

Cited by 2 publications

References 13 publications

A vibration correction system for cold atom gravimeter

A vibration correction system for cold atom gravimeter

Eliminating the influence of modulation depth by a laser interference double detection system

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