管道小缺陷超聲檢測傳感器陣列電路設(shè)計
發(fā)布時間:2018-03-04 18:18
本文選題:管道檢測 切入點:超聲 出處:《上海交通大學(xué)學(xué)報》2017年09期 論文類型:期刊論文
【摘要】:針對現(xiàn)有的管道缺陷超聲陣列檢測技術(shù)發(fā)射聲能低、小缺陷檢出率低以及電路結(jié)構(gòu)復(fù)雜的問題,設(shè)計了一種8通道陣列收發(fā)電路.發(fā)射電路采用單片機控制發(fā)射電路產(chǎn)生時序和重復(fù)頻率均可調(diào)的8路高壓窄脈沖,實現(xiàn)陣列的激發(fā).接收電路采用數(shù)控模擬多路復(fù)用器,實現(xiàn)接收電路的分時復(fù)用.將該陣列電路用于管道試樣檢測中,能夠檢測出直徑2mm、高3.6mm的平底孔和長×寬×高為10mm×0.5mm×1.5mm的裂紋,測量壁厚的平均誤差達到0.51%,且電路穩(wěn)定可靠.
[Abstract]:Aiming at the problems of low acoustic energy emission, low detection rate of small defects and complex circuit structure, the existing ultrasonic array detection techniques for pipeline defects are discussed. In this paper, an 8-channel array transceiver circuit is designed, which is controlled by a single chip microcomputer to generate 8-channel high-voltage narrow pulse with adjustable timing and repetition rate, which can be used to excite the array. The receiving circuit uses a numerical control analog multiplexer. The array circuit can be used to detect 2 mm diameter, 3.6 mm high flat bottom hole and 10 mm 脳 0.5 mm 脳 1.5 mm crack of length 脳 width 脳 height of 10 mm 脳 0.5 mm 脳 1.5 mm. The average error of measuring wall thickness is 0.51cm, and the circuit is stable and reliable.
【作者單位】: 江蘇大學(xué)儀器科學(xué)與工程系;
【基金】:國家自然科學(xué)基金項目(51375217)資助
【分類號】:TB559;TP212
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1 姬保平;激光超聲管道檢測系統(tǒng)關(guān)鍵技術(shù)研究[D];北京石油化工學(xué)院;2016年
,本文編號:1566779
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