Measurement time interval based on FPGA in NIM-3 absolute gravimeter

Shuqing Wu; Chunjian Li; Duowu Su; Jinyang Feng; Jinyi Xu

doi:10.1117/12.2180835

6 March 2015 Measurement time interval based on FPGA in NIM-3 absolute gravimeter

Shuqing Wu, Chunjian Li, Duowu Su, Jinyang Feng, Jinyi Xu

Proceedings Volume 9446, Ninth International Symposium on Precision Engineering Measurement and Instrumentation; 94461P (2015) https://doi.org/10.1117/12.2180835
Event: International Symposium on Precision Engineering Measurement and Instrumentation, 2014, Changsha/Zhangjiajie, China

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.

Citation Download Citation

Shuqing Wu, Chunjian Li, Duowu Su, Jinyang Feng, and Jinyi Xu "Measurement time interval based on FPGA in NIM-3 absolute gravimeter", Proc. SPIE 9446, Ninth International Symposium on Precision Engineering Measurement and Instrumentation, 94461P (6 March 2015); https://doi.org/10.1117/12.2180835

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