Title :
The research of a novel matching demodulation system based on PZT
Author :
Liu Bo ; Li Jianxia ; Liu Na ; Liang Wei
Author_Institution :
Higher Educ. Key Lab. for Meas. & Control Technol. & Instrumentations of Heilongjiang Province, Harbin Univ. of Sci. & Technol., Harbin, China
Abstract :
In this paper, a new type of fiber Bragg grating (FBG) sensor matching demodulation system based on piezoelectric ceramic (PZT) is designed. Through the micro displacement of phase-sensitive detector (PSD)´s displacement feedback signal counterproductive in PZT, a closed-loop control system can be formed, with the function of driving, detecting and compensating. This system effectively solves some influences on the control precision of micro-displacement produced by the hysteresis nonlinearity and creep properties of PZT, and improves the demodulating accuracy of the demodulating system greatly.
Keywords :
Bragg gratings; closed loop systems; control nonlinearities; demodulation; displacement measurement; fibre optic sensors; hysteresis; microsensors; phase detectors; piezoceramics; FBG sensor; PZT; closed loop control system; creep; displacement feedback signal; fiber Bragg grating; hysteresis nonlinearity; matching demodulation system; microdisplacement; phase sensitive detector; piezoelectric ceramic; Demodulation; Detectors; Fiber gratings; Optical fiber sensors; Optical fibers; Strain; matching demodulation technology; phase-sensitive detector; piezoelectric ceramic;
Conference_Titel :
Strategic Technology (IFOST), 2011 6th International Forum on
Conference_Location :
Harbin, Heilongjiang
Print_ISBN :
978-1-4577-0398-0
DOI :
10.1109/IFOST.2011.6021165
