Performance Improvement of Raman Distributed Temperature System by Using Noise Suppression

• 来源期刊: 光子传感器（英文版）
• 关键词: Optical fiber sensors Raman scattering noise suppression wavelet transform modulus maximum
• 年，卷（期）: 2018,（2）
• 页码范围: 103-113
• 页数: 11页
• 语种: 英文
• DOI: 10.1007/s13320-017-0474-5

摘要

In Raman distributed temperature system,the key factor for performance improvement is noise suppression,which seriously affects the sensing distance and temperature accuracy.Therefore,we propose and experimentally demonstrate dynamic noise difference algorithm and wavelet transform modulus maximum (WTMM) to de-noising Raman anti-Stokes signal.Experimental results show that the sensing distance can increase from 3 km to 11.5 km and the temperature accuracy increases to 1.58 ℃ at the sensing distance of 10.4km.