An FPGA-based controlling and data acquisition scheme for the demodulation of quasi-distributed FBG sensing system

Run Yu; Yongjun Wang; Kuiru Wang

doi:10.1117/12.871858

17 November 2010 An FPGA-based controlling and data acquisition scheme for the demodulation of quasi-distributed FBG sensing system

Run Yu, Yongjun Wang, Kuiru Wang

Author Affiliations +

Proceedings Volume 7848, Holography, Diffractive Optics, and Applications IV; 78483E (2010) https://doi.org/10.1117/12.871858
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

This paper propose a complete design and implementation of a controlling and data acquisition scheme for the demodulation of Quasi-Distributed Fiber Bragg Grating (FBG) sensor system by combining the technology of USB 2.0 and FPGA with precise system adjustment strategies, aiming to meet the requirement of acquiring large amount of data in real time for multiplexing a number of sensors, while maintaining stable control and accurate monitoring over all sensors on a small-sized embedded module. A Xilinx Spartan-3 FPGA and several DACs, including LTC1450 and LTC1597 are used to control a F-P filter as a wavelength selection element for demodulation, as well as realizing adjustment and stability of the whole sensing system while a high speed data path is conducted by the same FPGA and a Cypress USB controller. A newly designed method for rotational data transfer is applied to complete signal compensating and system adjustment. A quasi-distributed FBG sensing system with precise control and stable coordination can be achieved while the sensing data is easily obtained without losing details.

Citation Download Citation

Run Yu, Yongjun Wang, and Kuiru Wang "An FPGA-based controlling and data acquisition scheme for the demodulation of quasi-distributed FBG sensing system", Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 78483E (17 November 2010); https://doi.org/10.1117/12.871858

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