基于混沌理论的天然气管道泄漏检测实验  

Leak Detection Experiment of Natural Gas Pipeline Based on Chaos Theory

作　　者：胡菊丽 张自强[1] 高允领[1] 

机构地区：[1]上海师范大学信息与机电工程学院,上海201418

出　　处：《实验室研究与探索》2014年第7期35-38,175,共5页Research and Exploration In Laboratory

基　　金：上海市科委项目基金(11510502400)

摘　　要：提出了一种基于混沌理论的天然气管道的泄漏检测方法.该方法利用混沌理论对噪声具有抑制作用,对同频率的微弱周期信号极其敏感的特点,首先将采集到的声发射信号的频率压缩至1 - 10 rad/s,然后将信号输入Duffing振子阵列系统中,以振子阵列系统的状态转换实现强噪声中泄漏信号的检测.仿真实验证明,该系统在强噪声背景下具有很强的抗干扰能力,能从噪声中检测泄漏信号并能提高泄漏检测的准确率.As a kind of clean and efficient energy,natural gas gets more and more attention of the world.Flammable and explosion endanger the security of gas pipeline.Pipeline leak detection is an important technology for the safety of pipelines.This method presented is to use the features of chaos phenomenon that can inhibit noise and is extremely sensitive of weak periodic signal with the frequency.Firstly,the frequency of collected acoustic emission signal is compressed to 1-10 rad/s,then the signal is inputted to Duffing oscillator array system.With vibration subsystem state transition,the detection of the leakage signal is transformed into the strong noise.The simulation experiment shows that the system has strong anti-disturbance ability under the strong noise background,and can detect the leakage signal from noise and improve the accuracy rate of leakage detection.The method is feasible.

关 键 词：天然气管网 泄漏检测 混沌理论 声发射 

分 类 号：TE832[石油与天然气工程—油气储运工程]