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Design and Modification of a High-Resolution Optical Interferometer Accelerometer
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Design and Modification of a High-Resolution Optical Interferometer Accelerometer
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Design and Modification of a High-Resolution Optical Interferometer Accelerometer
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Journal Article
Design and Modification of a High-Resolution Optical Interferometer Accelerometer
2021
Overview
The Micro-Opto-Electro-Mechanical Systems (MOEMS) accelerometer is a new type of accelerometer that combines the merits of optical measurement and Micro-Electro-Mechanical Systems (MEMS) to enable high precision, small volume, and anti-electromagnetism disturbance measurement of acceleration, which makes it a promising candidate for inertial navigation and seismic monitoring. This paper proposes a modified micro-grating-based accelerometer and introduces a new design method to characterize the grating interferometer. A MEMS sensor chip with high sensitivity was designed and fabricated, and the processing circuit was modified. The micro-grating interference measurement system was modeled, and the response sensitivity was analyzed. The accelerometer was then built and benchmarked with a commercial seismometer in detail. Compared to the previous prototype in the experiment, the results indicate that the noise floor has an ultra-low self-noise of 15 ng/Hz1/2.
Publisher
MDPI AG,MDPI
