基于超声导波的灌溉管道生长环检测技术研究  

Growth Ring Detection Technology for Irrigation Pipeline Based on the Ultrasonic Guided Wave

作　　者：郑运鸿[1] 张胜华[2] 杨宁[3] 张晨亮[3] 

机构地区：[1]厦门理工学院电子与电气工程系,福建厦门361024 [2]中国科学院城市环境研究所,福建厦门361021 [3]江苏大学电气工程学院,江苏镇江212013

出　　处：《农机化研究》2013年第1期173-176,共4页Journal of Agricultural Mechanization Research

基　　金：福建省农业科技计划重点项目(2011N0038);福建省自然科学基金项目(2010J01315);厦门理工学院人才引进基金项目(YKJ11003R)

摘　　要：管道生长环是影响农业灌溉水质和造成灌管网堵塞的重要问题。针对目前常规检测方法检测范围较窄的缺陷,提出了一种基于纵向超声导波技术的灌溉水管道生长环结垢检测方法。通过对激励信号的分析,选取中心频率为500kHz的模态导波对生长环结垢管道进行检测试验,利用小波变换技术对采集到的超声导波信号进行分析处理。实验结果表明:纵向超声导波能很准确地检测生长环结垢的分布状况,但通过分析小波能量系数变量能够有效检测出检测管道内的生长环结垢状况。The pipeline growth ring is the important issue of the impact of agricultural irrigation water quality and cause clogging of irrigation pipe network.For the defects narrower range of the conventional testing methods,the growth rings of a longitudinal ultrasonic guided wave technology-based irrigation water pipeline scaling detection method was put forward.Analysis of the excitation signal,select the center frequency of 500 kHz mode guided wave test the growth rings scaling pipeline.Using wavelet transform technology processing analyzes the ultrasonic guided wave signal of acquisition.Experimental results show that the longitudinal ultrasonic guided wave can accurately detect the scaling distribution of the growth rings,and by analyzing the wavelet energy coefficient can effectively detect the fouling thickness of growth rings within the detection pipeline.

关 键 词：灌溉管道 生长环 小波变换 超声导波 检测技术 

分 类 号：TG115.28[金属学及工艺—物理冶金]