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Proceedings Paper

Fiber Bragg grating demodulatin system based on ARM and LabVIEW
Author(s): Ying Zhang; Chunhui Wu; Yinrui Qiu
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Paper Abstract

A novel FBG sensing signal demodulation system based on ARM7 and LabVIEW8.6 is proposed. Matching FBG demodulation method is used to demodulate the luminous intensity signal. The screw attached to stepper motor is controlled by ARM7 microprocessor to impel the cantilever and makes the matching FBG adhered on the cantilever to scan the Bragg wavelengths offset of the sensing FBG. With the synthetics curve of the steps of the motor and Bragg wavelengths of the sensing FBG, we can calculate the tiny offset of wavelength and realize the intention of FBG sensing signal demodulation. After being processed by the weak signal processing circuit and AD convert circuit, the electrical signal converted from the luminous intensity signal enters the MCU. The data coming from the ARM is filtered by the LabVIEW and displayed on the PC. The maximal strain measuring range of 1100με and the measuring accuracy of ±1με are archived in the experiment. The experiment shows that the result of strain tested and the theory one have a good linear relationship.

Paper Details

Date Published: 11 October 2010
PDF: 6 pages
Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 765605 (11 October 2010); doi: 10.1117/12.864091
Show Author Affiliations
Ying Zhang, Yanshan Univ. (China)
Chunhui Wu, Yanshan Univ. (China)
Yinrui Qiu, Yanshan Univ. (China)


Published in SPIE Proceedings Vol. 7656:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; Jose M. Sasian; Libin Xiang; Sandy To, Editor(s)

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