12 July 1993 Parallel multiplexing and demodulation of fiber optic strain gauges
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The use of fiber-optic strain gauges in realistic smart structures applications is contingent on the availability of a number of sensors embedded or adhered to the structure at a cost comparable to that of existing on-board diagnostic sensor systems. The most effective way of implementing such a sensor topology is to share the most expensive components of the system among many sensors. A cost-intensive component in a fiber-optic strain gauge system is the laser diode and its associated drive electronics. Parallel multiplexing allows many gauges to share a common source. Design and performance issues related to parallel multiplexed fiber Fabry-Perot strain gauge systems are discussed. A commercial four-channel parallel multiplexed strain gauge system is described.
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T. G. Beck Mason, T. G. Beck Mason, Tomas Valis, Tomas Valis, W. Dayle Hogg, W. Dayle Hogg, "Parallel multiplexing and demodulation of fiber optic strain gauges", Proc. SPIE 1918, Smart Structures and Materials 1993: Smart Sensing, Processing, and Instrumentation, (12 July 1993); doi: 10.1117/12.147974; https://doi.org/10.1117/12.147974

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