典型文献
TFM imaging of aeroengine casing ring forgings with curved surfaces using acoustic field threshold segmentation and vector coherence factor
文献摘要：
The aeroengine casing ring forgings have complex cross-section shapes,when the con-ventional ultrasonic or phased array is applied to detect such curved surfaces,the inspection images always have low resolution and even artifacts due to the distortion of the wave beam.In this article,taking a type of aeroengine casing ring forging as an example,the Total Focusing Method(TFM)algorithms for curved surfaces are investigated.First,the Acoustic Field Threshold Segmentation(AFTS)algorithm is proposed to reduce background noise and data calculation.Furthermore,the Vector Coherence Factor(VCF)is adopted to improve the lateral resolution of the TFM imag-ing.Finally,a series of 0.8 mm diameter Side-Drilled Holes(SDHs)are machined below convex and concave surfaces of the specimen.The quantitative comparison of the detection images using the conventional TFM,AFTS-TFM,VCF-TFM,and AFTS-VCF-TFM is implemented in terms of data volume,imaging Signal-to-Noise Ratio(SNR),and defect echo width.The results show that compared with conventional TFM,the data volume of AFTS-VCF-TFM algorithm for convex and concave is decreased by 32.39％and 73.40％,respectively.Moreover,the average SNR of the AFTS-VCF-TFM is gained up to 40.0 dB,while the average 6 dB-drop echo width of defects is reduced to 0.74 mm.
文献关键词：
中图分类号：
作者姓名：
Shanyue GUAN;Xiaokai WANG;Lin HUA;Yixuan LI
作者机构：
Hubei Key Laboratory of Advanced Technology for Autornotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan 430070,China;School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China
文献出处：
引用格式：
[1]Shanyue GUAN;Xiaokai WANG;Lin HUA;Yixuan LI-.TFM imaging of aeroengine casing ring forgings with curved surfaces using acoustic field threshold segmentation and vector coherence factor)[J].中国航空学报（英文版）,2022(11):401-415
A类：
AFTS,Drilled,SDHs
B类：
TFM,imaging,aeroengine,casing,ring,forgings,curved,surfaces,acoustic,field,threshold,segmentation,vector,coherence,have,complex,cross,section,shapes,when,ultrasonic,phased,array,applied,such,inspection,images,always,resolution,even,artifacts,due,distortion,wave,beam,In,this,article,taking,type,example,Total,Focusing,Method,algorithms,investigated,First,Acoustic,Field,Threshold,Segmentation,proposed,background,noise,data,calculation,Furthermore,Vector,Coherence,Factor,VCF,adopted,improve,lateral,Finally,series,diameter,Side,Holes,machined,below,convex,concave,specimen,quantitative,comparison,detection,conventional,implemented,terms,volume,Signal,Noise,Ratio,SNR,echo,width,results,show,that,compared,decreased,by,respectively,Moreover,average,gained,up,dB,while,drop,defects,reduced
AB值：
0.489353
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