Share Email Print
cover

Proceedings Paper • new

Information extraction of vibration based on Ф-OTDR vibration sensing system using different signal processing algorithms
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A phase-sensitive optical time-domain reflectometric (Φ-OTDR) system based on the direct detection is demonstrated. It uses amplitude difference and two-dimensional Fourier transform method to extract the vibration information with a frequency response range from 5Hz to 2.5kHz, with a frequency resolution of 1 Hz, and the longest sensing length has reaches 9.8km. Then, a vibration positioning scheme based on hybrid Gaussian model is introduced, which is able to overcome the system error caused by laser power drift and successfully reduce the positioning error in the vibration-free region. A Φ-OTDR system based on the heterodyne detection is also proposed. Using self-mixing as demodulation method and the bilateral filtering algorithm in image processing as signal filtering method, this system preserves the information of vibration while filtering the background noise and improves the signal to noise ratio. Compared with the positioning result under direct detection scheme, there is a great improvement of result under this heterodyne detection scheme, and a better frequency response as low as 3 Hz is obtained.

Paper Details

Date Published: 10 May 2019
PDF: 13 pages
Proc. SPIE 11068, Second Symposium on Novel Technology of X-Ray Imaging, 110682P (10 May 2019); doi: 10.1117/12.2524759
Show Author Affiliations
Wei Yin, Univ. of Electronic Science and Technology of China (China)
Zhonghua Ou, Univ. of Electronic Science and Technology of China (China)
Yong Liu, Univ. of Electronic Science and Technology of China (China)
Xuechao Pei, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 11068:
Second Symposium on Novel Technology of X-Ray Imaging
Yangchao Tian; Tiqiao Xiao; Peng Liu, Editor(s)

© SPIE. Terms of Use
Back to Top