基于正弦曲面超声缓冲杆的回波降噪方法  

Ultrasonic Denoising Technology Based on a Buffer Rod with Sine Outline Structure

作　　者：武美先[1] 张东利[2] 王召巴[3] 陈振茂[4] 

机构地区：[1]北方民族大学化学与化学工程学院,银川750021 [2]北方民族大学机电工程学院,银川750021 [3]中北大学信息与通信工程学院,太原030051 [4]西安交通大学强度与振动教育部重点实验室,西安710049

出　　处：《无损检测》2015年第11期64-67,共4页Nondestructive Testing

基　　金：宁夏自然科学基金资助项目(NZ14100);北方民族大学科研资助项目(2014XYZ07);北方民族大学引进人才项目;北方民族大学基本科研项目(2015JBK556;2015JBK617)

摘　　要：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。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.

关 键 词：聚合物 缓冲杆 超声检测 数值仿真 信噪比 

分 类 号：TB553[理学—物理] TG115.28[理学—声学]