Title :
An Improved Denoising Method in RDTS Based on Wavelet Transform Modulus Maxima
Author :
Zongliang Wang ; Jun Chang ; Sasa Zhang ; Sha Luo ; Chuanwu Jia ; Shuo Jiang ; Boning Sun ; Yongning Liu ; Xiaohui Liu ; Guangping Lv
Author_Institution :
Shandong Provincial Key Lab. of Laser Technol. & Applic., Shandong Univ., Jinan, China
Abstract :
This paper proposed and demonstrated an improved wavelet transform modulus maxima (WTMM) denoising method to decrease the temperature error without decreasing spatial resolution in Raman distributed temperature sensors. In this scheme, the WTMM were obtained by combining those on the high and low decomposition scales, and the temperature signal was reconstructed using the WTMM. Experimental results show that the new proposed method has better denoising effect than the conventional one, allowing for the temperature error reduction of ~2 °C at 30 °C and 60 °C without decreasing spatial resolution comparing to original data.
Keywords :
optical sensors; signal denoising; signal reconstruction; temperature sensors; wavelet transforms; Raman distributed temperature sensors; improved denoising method; signal reconstruction; spatial resolution; temperature error reduction; wavelet transform modulus maxima; Noise reduction; Signal to noise ratio; Temperature sensors; Wavelet transforms; Raman; distributed temperature sensor; modulus maxima; spatial resolution; wavelet transform;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2014.2360559
