摘要
以超声检测技术为手段,对合金火箭弹弹体进行缺陷自动检测,采用自适应滤波有效地抑制了由于喷水造成的噪声干扰,将系统分析的理论引入到缺陷的超声检测中,通过反褶积技术有效提取表征缺陷信息的特征量,并根据所得的缺陷幅度特征进行C扫描成像,直观地看出缺陷的有无和缺陷所处的轴向位置,根据缺陷时间延时特征实现了缺陷在圆周截面上的准确定位。实验的结果与X射线检测结果比较表明,文中所采用超声检测方法和信号处理技术能够有效准确地检测出合金火箭弹弹体的缺陷,该信号处理方法也适用于其他圆柱圆锥结构物体的超声检测。
The ultrasonic testing method is adopted to detect the defect of the alloy rocket body.The noise disturbance caused by water spraying can be effectively eliminated by using adaptive filtering for pretreatment.The system analysis theory was introdaued into ultrasonic defect testing,and effective characteristics of defect were extracted by deconvolution method.C-scan image can be obtained,based on which the existence of the defect and axial position of the defect can be intuitively seen,and the accurate positioning of the defect in the circumferential cross-section was achieved by the delay characteristics of the defect signal.The experimental results were compared with the X-ray test results,which shows that the ultrasonic testing method and signal processing technology can effectively and accurately detect the defect of the alloy rocket body,the technique can also be applied to defect detection of other cylindrical or conical object.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2013年第5期706-710,共5页
Journal of Solid Rocket Technology
基金
国家自然科学基金(61201412)
山西省青年科技研究基金(2012021011-5)
山西省科技攻关项目(20110321029)
关键词
超声检测
合金火箭弹
自适应滤波
反褶积技术
缺陷定位
ultrasonic testing
alloy rocket
adaptive filtering
deconvolution method
defect location
