Title :
Experimental study of coupling low-frequency fiber-optic vibration sensor
Author :
Jian, Xu ; Bin, Ma
Author_Institution :
Sch. of Comput. Sci. & Eng., Shandong Univ. of Finance, Jinan, China
Abstract :
An innovative low-frequency fiber-optic coupling vibration sensor for monitoring vibration of large-size structures is presented. The working principle of low-frequency fiber-optic coupling vibration sensor is discussed and the demodulation system for photoelectric conversion and signal process to its response is designed. A prototype fiber optic vibration detection system is developed successfully. The output of the sensor when applied with low-frequency vibration and shock is shown. Experimental results show that the sensor´s sensitivity is 2000mV/g, and its Signal to Noise is 32dB. The fiber-optic sensor demonstrates high response capability in comparison with piezoelectric accelerometer, and it could realize the measurement of the low frequency vibration.
Keywords :
demodulation; fibre optic sensors; photoelectric devices; vibration measurement; coupling low-frequency; demodulation system; fiber optic coupling vibration sensor; large-size structures; loss 32 dB; low-frequency vibration; photoelectric conversion; piezoelectric accelerometer; prototype fiber optic vibration detection system; sensor´s sensitivity; signal process; Couplers; Couplings; Frequency measurement; Optical fiber couplers; Optical fiber sensors; Vibration measurement; Vibrations; coupler; fiber-optic; low-frequency; measurement; vibration;
Conference_Titel :
Intelligent Control and Automation (WCICA), 2010 8th World Congress on
Conference_Location :
Jinan
Print_ISBN :
978-1-4244-6712-9
DOI :
10.1109/WCICA.2010.5554191
