无损检测
無損檢測
무손검측
Nondestructive Testing
2015年
11期
64-67
,共4页
武美先%张东利%王召巴%陈振茂
武美先%張東利%王召巴%陳振茂
무미선%장동리%왕소파%진진무
聚合物%缓冲杆%超声检测%数值仿真%信噪比
聚閤物%緩遲桿%超聲檢測%數值倣真%信譟比
취합물%완충간%초성검측%수치방진%신조비
Polymer%Buffer rod%Ultrasonic measurement%Numerical Simulation%SNR
为了消除超声缓冲杆中尾随噪声对超声回波信号的影响,提出了一种复杂结构的缓冲杆,可有效提高超声回波信号的信噪比。采用超声数值仿真方法,分析了缓冲杆外轮廓形状、周期数变化对回波信号信噪比的影响,发现正弦曲面缓冲杆比常规的圆柱及圆锥杆具有更高的信噪比,可为超声缓冲杆的优化设计提供理论指导。
為瞭消除超聲緩遲桿中尾隨譟聲對超聲迴波信號的影響,提齣瞭一種複雜結構的緩遲桿,可有效提高超聲迴波信號的信譟比。採用超聲數值倣真方法,分析瞭緩遲桿外輪廓形狀、週期數變化對迴波信號信譟比的影響,髮現正絃麯麵緩遲桿比常規的圓柱及圓錐桿具有更高的信譟比,可為超聲緩遲桿的優化設計提供理論指導。
위료소제초성완충간중미수조성대초성회파신호적영향,제출료일충복잡결구적완충간,가유효제고초성회파신호적신조비。채용초성수치방진방법,분석료완충간외륜곽형상、주기수변화대회파신호신조비적영향,발현정현곡면완충간비상규적원주급원추간구유경고적신조비,가위초성완충간적우화설계제공이론지도。
To decrease the influence of trailing echoes on testing signals during the ultrasonic wave propagation in a buffer rod,a new structure of the buffer rod was proposed in this paper,with which the ultrasonic sensor can obtain signals of higher signal-to-noise ratio (SNR).By using simulation method,influences of the rod shape and structure on SNR were analyzed.It was found that the rod with structure of sine outline is more better than the cylinder or cone rod.Conclusions drawn in this paper can give theoretical guidance for the rod's manufacture.