Application of wavelet transform modulus maxima in raman distributed temperature sensors

Zongliang Wang; Jun Chang; Sasa Zhang; Sha Luo; Cuanwu Jia; Boning Sun; Shuo Jiang; Yongning Liu; Xiaohui Liu; Guangping Lv; Zhi Liu

doi:10.1007/s13320-014-0179-y

Photonic Sensors ›› 2013, Vol. 4 ›› Issue (2) : 142 -146. DOI: 10.1007/s13320-014-0179-y

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Application of wavelet transform modulus maxima in raman distributed temperature sensors

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Abstract

We proposed and demonstrated a wavelet transform modulus maxima (WTMM) de-noising method to decrease the temperature error. In this scheme, the composition scale was determined simply by the WTMM amplitude variation with the growth of the decomposition scale at 30 °C, and the signal WTMM was obtained by the wavelet decomposition modulus on every decomposition scale based on the modulus propagating difference between the signal and noise. Then, we reconstructed the signal using the signal WTMM. Experimental results show that the proposed method is effective for de-noising, allowing for a temperature error decrease of about 1 °C at 40 °C and 50 °C comparing to the original data.

Keywords

Distributed temperature sensor / Raman / wavelet transform modulus maxima

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Zongliang Wang, Jun Chang, Sasa Zhang, Sha Luo, Cuanwu Jia, Boning Sun, Shuo Jiang, Yongning Liu, Xiaohui Liu, Guangping Lv, Zhi Liu. Application of wavelet transform modulus maxima in raman distributed temperature sensors. Photonic Sensors, 2013, 4(2): 142-146 DOI:10.1007/s13320-014-0179-y

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