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Proceedings Paper

Measurement time interval based on FPGA in NIM-3 absolute gravimeter
Author(s): Shuqing Wu; Chunjian Li; Duowu Su; Jinyang Feng; Jinyi Xu
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Paper Abstract

In order to perform gravity measurement with compact and portable instrument at several ten mGal accuracy level, a digital fringe signal processing method was proposed for the measurement time interval in a ballistic free-fall absolute gravimeter. This method based on the theory of digital phase-shift which was used in the SOPC system on a FPGA DE2 Electric Board and NIOS-II processor produced by Altera company. This method has been successfully used for the measurement of interference fringe numbers and time interval in NIM-3 ballistic free-fall absolute gravimeter.

Paper Details

Date Published: 6 March 2015
PDF: 4 pages
Proc. SPIE 9446, Ninth International Symposium on Precision Engineering Measurement and Instrumentation, 94461P (6 March 2015); doi: 10.1117/12.2180835
Show Author Affiliations
Shuqing Wu, National Institute of Metrology (China)
Chunjian Li, National Institute of Metrology (China)
Duowu Su, National Institute of Metrology (China)
Jinyang Feng, National Institute of Metrology (China)
Jinyi Xu, National Institute of Metrology (China)


Published in SPIE Proceedings Vol. 9446:
Ninth International Symposium on Precision Engineering Measurement and Instrumentation
Junning Cui; Jiubin Tan; Xianfang Wen, Editor(s)

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