超声缓冲杆回波降噪方法研究  

Study of Ultrasonic Denoise Technology for Bottom Echoes in a Buffer Rod

作　　者：武美先[1] 张东利[2] 王召巴[3] 

机构地区：[1]北方民族大学化学与化学工程学院,宁夏银川750021 [2]北方民族大学机电工程学院,宁夏银川750021 [3]中北大学信息与通信工程学院,山西太原030051

出　　处：《测试技术学报》2015年第6期515-522,共8页Journal of Test and Measurement Technology

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资助项目;北方民族大学基本科研资助项目(2015JBK556;2015JBK617);山西省科技攻关计划资助项目(20110321029)

摘　　要：针对超声缓冲杆中尾波噪声影响超声回波信号的情况,研究了通过改变缓冲杆结构尺寸和激励频率来抑制尾随噪声的方法,为超声缓冲杆的结构优化提供理论指导.本文采用超声数值仿真方法,研究了圆柱杆材料、直径、探头激励频率等因素以及缓冲杆锥角及长度比例对回波信噪比大小的影响.数值仿真结果表明,通过选择合适的缓冲杆材料、结构以及激励频率,可有效降低尾波噪声对检测信号的影响,提高回波信号的信噪比.To decrease the influence of trailing echoes on echo signals during the ultrasonic wave propagating in a buffer rod,several denoised methods were studied by changing the rod structure,dimension and excitation frequency to provide theoretical guidance for its structural optimization.The influences of material,diameter,excitation frequency,cone angle and length scale of the cylinder buffer rod on signal-to-noise ratio（SNR）of ultrasonic pulse-echo signals were all studied by using ultrasonic simulation methods.Simulation results show that SNR can be improved by choosing the appropriate materials,and structure of the buffer rod and excitation frequency.

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]