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

Volume

15

Issue

2

fYear

2015

fDate

Feb. 2015

Firstpage

1061

Lastpage

1067

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;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2014.2360559

Filename

6911968