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Vibration Compensation for a Vehicle-Mounted Atom Gravimeter.
- Source :
- IEEE Sensors Journal; Jul2022, Vol. 22 Issue 13, p12939-12946, 8p
- Publication Year :
- 2022
-
Abstract
- The performance of absolute atom gravimeters used on moving platforms, such as vehicles, ships and aircrafts, is strongly affected by the vibration noise. To suppress its influence, we introduce a vibration compensation method, in which a classical accelerometer is used to measure the vibration noise. The measurement results obtained by the accelerometer show the vibration noise in the vehicle can be 2 orders of magnitude greater than that in the lab during daytime, and can induce an interferometric phase fluctuation with a standard deviation of $16.70\pi $. With the compensation method, our vehicle-mounted atom gravimeter can work normally under harsh conditions. Comparing the Allan standard deviations before and after the vibration noise correction, we find a suppression factor of 22.74 can be achieved in static condition with a half interrogation time of T = 20 ms, resulting in a sensitivity of 1.35 mGal/Hz1/2, and a standard deviation of 0.5 mGal with an average time of 10 s. We also demonstrate the first test of an atom gravimeter in a moving vehicle, in which a suppression factor of 50.85 and a sensitivity of 60.88 mGal/Hz1/2 were realized with T = 5 ms. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1530437X
- Volume :
- 22
- Issue :
- 13
- Database :
- Complementary Index
- Journal :
- IEEE Sensors Journal
- Publication Type :
- Academic Journal
- Accession number :
- 157765442
- Full Text :
- https://doi.org/10.1109/JSEN.2022.3179297