Distributed strain measurement system in one-dimensional by means of multipoint FBG sensing
2013
In this paper, we described a distributed strain measurement scheme in one-dimensional. The sensing information
of FBG is demodulated by a CCD spectrometer, the discrete strain is achieved by fitting and processing discrete
signal demodulated utilizing labVIEW virtual instrument technology. Then it could be achieved by Using
polynomial fitting method to one-dimensional discrete strain distributed detection. Experimentally, measurement
was implemented in Cantilever to prove the system performance. The experimental result shows that the system
can reflect the strain distribution in one-dimensional and an order strain modal characteristics of cantilever
accurately. The detection system can achieve real-time and dynamic measurements, the response time for 2kHz,
the response accuracy for 4μ(epsilon).
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