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计算机系统应用英文版:2011,20(9):135-138

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基于DSP 的分布式测温系统

向进¹, 刘波峰¹, 李亚²

(1.湖南大学电气与信息工程学院,长沙 410082;2.湖南工程学院电气信息学院,湘潭 411104)

Fiber Optic Distributed Temperature Measurement System Based on DSP

XIANG Jin¹, LIU Bo-Feng¹, LI Ya²

(1.College of Electrical and Information Engineering, Hunan University, Changsha 410082, China;2.College of Electrical Information, Hunan Institute of Engineering, Xiangtan 411104, China)

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Received:January 18, 2011 Revised:February 26, 2011

中文摘要: 分布式光纤测温系统具有本质安全、抗电磁干扰能力强、快速多点测量和定位、易于安装等特点.提出了以DSP 为核心的分布式测温系统,并针对拉曼散射温度信号完全淹没在噪声之中的特点,采用一种改进的小波阈值函数和阈值选取方法来对拉曼散射温度信号进行去噪.仿真实验表明,改进阈值函数的小波去噪有效地提高了去噪效果,从而提高了分布式光纤测温系统的精度并简化了系统结构.

中文关键词: 分布式测温 DSP 拉曼散射小波去噪能量熵

Abstract:Distributed fiber optic temperature measurement system has the characteristics of intrinsic safety, strong anti-electromagnetic interference capability, fast multi-points measurement and positioning, easy to install and so on. This paper introduces a distributed temperature measurement system based on DSP. Because the Raman scattering signal including temperature information is completely submerged in noise. We pick up an improved threshold function and threshold selection method to denoise the Raman scattering signal. Simulation results show that the improved wavelet denoising threshold function can effectively improve the noise reduction effect, improve the accuracy of the distributed fiber optic temperature measurement system, and simplify the system structure.

keywords: distributed temperature measurement DSP raman scattering wavelet deniosing energy entropy

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Author Name	Affiliation
XIANG Jin	College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
LIU Bo-Feng	College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
LI Ya	College of Electrical Information, Hunan Institute of Engineering, Xiangtan 411104, China

Author Name	Affiliation
XIANG Jin	College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
LIU Bo-Feng	College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
LI Ya	College of Electrical Information, Hunan Institute of Engineering, Xiangtan 411104, China

引用文本：
向进,刘波峰,李亚.基于DSP 的分布式测温系统.计算机系统应用,2011,20(9):135-138
XIANG Jin,LIU Bo-Feng,LI Ya.Fiber Optic Distributed Temperature Measurement System Based on DSP.COMPUTER SYSTEMS APPLICATIONS,2011,20(9):135-138