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http://dx.doi.org/10.12989/sss.2013.12.1.023

Investigation of smart multifunctional optical sensor platform and its application in optical sensor networks  

Pang, C. (Department of Mechanical Engineering, University of Maryland)
Yu, M. (Department of Mechanical Engineering, University of Maryland)
Gupta, A.K. (Department of Mechanical Engineering, University of Maryland)
Bryden, K.M. (Department of Mechanical Engineering, Iowa State University)
Publication Information
Smart Structures and Systems / v.12, no.1, 2013 , pp. 23-39 More about this Journal
Abstract
In this article, a smart multifunctional optical system-on-a-chip (SOC) sensor platform is presented and its application for fiber Bragg grating (FBG) sensor interrogation in optical sensor networks is investigated. The smart SOC sensor platform consists of a superluminescent diode as a broadband source, a tunable microelectromechanical system (MEMS) based Fabry-P$\acute{e}$rot filter, photodetectors, and an integrated microcontroller for data acquisition, processing, and communication. Integrated with a wireless sensor network (WSN) module in a compact package, a smart optical sensor node is developed. The smart multifunctional sensor platform has the capability of interrogating different types of optical fiber sensors, including Fabry-P$\acute{e}$rot sensors and Bragg grating sensors. As a case study, the smart optical sensor platform is demonstrated to interrogate multiplexed FBG strain sensors. A time domain signal processing method is used to obtain the Bragg wavelength shift of two FBG strain sensors through sweeping the MEMS tunable Fabry-P$\acute{e}$rot filter. A tuning range of 46 nm and a tuning speed of 10 Hz are achieved. The smart optical sensor platform will open doors to many applications that require high performance optical WSNs.
Keywords
microelectromechanical system; Fabry-P$\acute{e}$rot tunable filter; wireless optical sensor network; multiplexing fiber Bragg grating; strain measurement;
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Times Cited By KSCI : 1  (Citation Analysis)
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