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基于小波变换的BOTDR光纤温度传感系统去噪声研究
引用本文:邱卫卫,隋青美,张桂涛,韦斌. 基于小波变换的BOTDR光纤温度传感系统去噪声研究[J]. 激光与光电子学进展, 2004, 41(11): 26-29
作者姓名:邱卫卫  隋青美  张桂涛  韦斌
作者单位:山东大学控制科学与工程学院,济南,250061;山东大学控制科学与工程学院,济南,250061;山东大学控制科学与工程学院,济南,250061;山东大学控制科学与工程学院,济南,250061
摘    要:提出了一种利用小波变换技术对布里渊光时域反射(BOTDR)光纤温度传感系统测量数据进行去噪处理的方法.并根据分布式温度测量信号的特点,选择合适的小波函数,利用信息论中熵的概念来确定小波分解层数,最后用某发电机组现场的实测数据进行了验证。实例表明,该方法能有效消除噪声,并在很大程度上缩短了温度测量周期,提高了系统的实用性。

关 键 词:布里渊光时域反射测量技术  分布式光纤传感器  温度测量  小波变换
收稿时间:2004-05-17

Study on Fiber-Optic BOTDR Temperature Sensor Signal Denoising Based On Wavelet Transform
QIU Weiwei SUI Qingmei ZHANG Guitao WEI Bin. Study on Fiber-Optic BOTDR Temperature Sensor Signal Denoising Based On Wavelet Transform[J]. Laser & Optoelectronics Progress, 2004, 41(11): 26-29
Authors:QIU Weiwei SUI Qingmei ZHANG Guitao WEI Bin
Abstract:A method of denoising the measured BOTDR fiber-optic temperature signal using wavelet transform is proposed, and on the analysis of the characteristics of distributed temperature measurement signal, the proper wavelet functions are selected and the levels of wavelet decomposition are ascertained by means of Shannon entropy. Test on the body surface of dynamotor unit indicates that the method is effective for signal denoising and the measurement period is greatly reduced, so the practicability of the system is improved.
Keywords:Brillouin optical time domain reflectometer distributed fiber-optic sensor temperature measurement wavelet transform
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