计量学报2024，Vol.45Issue(5)：722-729,8.DOI:10.3969/j.issn.1000-1158.2024.05.16
改进FFT算法在频域全聚焦超声成像中研究
Research on Improved FFT Algorithm in Frequency Domain Fully Focused Ultrasound Imaging
摘要
Abstract
At present,time-domain ultrasonic imaging algorithms are commonly used for ultrasonic imaging detection of hole defects in steel blocks.The delay stacking process in the method requires repetitive and tedious iterative operations,which cannot meet the requirements of high-quality real-time imaging.The frequency domain ultrasound imaging algorithm has higher imaging resolution and faster imaging speed.A radix 2-FFT input hierarchical truncation algorithm for any non zero value input was proposed,and the algorithm was applied to the frequency domain FMC-PSM algorithm for imaging,resulting in an improved FMC-PSM algorithm for ultrasonic imaging of hole defects in steel blocks.The experimental results show that compared to the standard FMC-PSM algorithm,the improved frequency domain FMC-PSM algorithm can present higher quality images while increasing the imaging speed by 15％,which is expected to solve the problem of difficult balance between imaging quality and imaging efficiency in ultrasound imaging.关键词
超声无损检测/超声层析成像/基2-FFT/全矩阵数据/成像速度/孔洞缺陷检测Key words
ultrasonic NDT/ultrasound tomography/radix-2-FFT/full matrix data/imaging speed/hole defect detection分类
通用工业技术引用本文复制引用
周英钢,刘振兴,梁晶亮,王善辉,李继冯,武美娜..改进FFT算法在频域全聚焦超声成像中研究[J].计量学报,2024,45(5):722-729,8.基金项目
国家自然科学基金(61372154,60772054) （61372154,60772054）
