Abstract
The present paper proposes a novel denoising method to suppress multi-source noise and enhance the signal-to-noise ratio (SNR) of the phase-sensitive optical-time-domain reflectometer (Ф-OTDR). The method is based on complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) and the interval thresholding. Firstly, the CEEMDAN is applied to the vibration signals to obtain a series of functions called the Intrinsic Mode Functions (IMFs). Secondly, the trip point is determined according to the fact that the product of energy density of the IMF and its corresponding averaged period is a constant. Then, the IMFs of noise dominant mode are treated with interval thresholding, and finally the IMFs and residual are reconstructed to obtain denoised signals. The results show that the SNR of disturbance location increases to 51.21 dB and 52.11 dB respectively, which represents a great improvement when compared with the other two methods.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.