Interferogram Reconstruction of Cascaded Coaxial Cable Fabry-Perot Interferometers for Distributed Sensing Application
This paper describes a distributed sensing concept using coaxial cable-based Fabry-Perot interferometers (CCFPIs). Multiple reflectors are implemented along a coaxial cable, where every two consecutive reflectors can be considered as a low finesse CCFPI, which has a relatively weak reflection coefficient and insertion loss. The interferogram in a frequency domain of each individual CCFPI could be reconstructed through the proposed signal processing method, so that the phase detection could be applied to any CCFPIs on one cable to achieve high measurement accuracy. A large capacity sensor network with a relatively high measurement accuracy can be implemented simultaneously. The concept takes advantage of the time-domain multiplexing method and the pure frequency domain measurement, which is herein called a joint-time-frequency demodulation technique. Due to its effectiveness and robustness, the device is especially attractive for structural, downhole, or underwater applications.
J. Huang et al., "Interferogram Reconstruction of Cascaded Coaxial Cable Fabry-Perot Interferometers for Distributed Sensing Application," IEEE Sensors Journal, vol. 16, no. 11, pp. 4495-4500, Institute of Electrical and Electronics Engineers (IEEE), Jun 2016.
The definitive version is available at http://dx.doi.org/10.1109/JSEN.2016.2530839
Electrical and Computer Engineering
Center for High Performance Computing Research
Keywords and Phrases
Cables; Coaxial cables; Frequency domain analysis; Interferometers; Interferometry; Reflection; Sensor networks; Signal processing; Time domain analysis; Capacity sensors; Coaxial cable sensors; Distributed sensing; Frequency domain measurement; Frequency domains; Interferograms; Measurement accuracy; Underwater application; Fabry-Perot interferometers; coaxial cable sensor; distributed sensing
International Standard Serial Number (ISSN)
Article - Journal
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