多采样率超声数字信号处理方法的研究与应用-南京师范大学学报.PDF

8 4 () Vo.l 8No. 4 2008 12 JOURNAL OF NAN JING NORMAL UN IVERSITY ( ENG INEERING AND TECHNOLOGY EDIT ION ) Dec, 2008 多采样率超声数字信号处理方法的研究与应用 1 1 2 3 孙志林 , 包亚萍, 石峥映, 梅劲松 ( 1. , 210009; 2. , 210019; 3. , 210016) [] (), , , , . , ; , CPLD, , , . [] , , , [ ] TN 911172 [] A [ ] 1672-1292( 2008) 04-0163-04 Research and App lication of M u lti-Sam p ling R ate of U ltrason ic D igital Signal P rocessing 1 1 2 3 Sun Zhilin, ao Y aping , ShiZhengying , MeiJinsong ( 1. College of Information Science and Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. NanjingTycho Information Technology Co. , L td. , Nanjing 210019, China; 3. College ofAutomation Engineering, Nanjing University of Aeronautics andA stronautics, Nanjing 210016, China) A bstrac t: In the piezoelectricity ultrasonic on-line testing for raiwl ay wheels ( included wheels of locomotive, vehicle, multiple unit trains, etc. ), the amount of acquired ultrasonic data can be very large, and the tmi e of transm it and process can be long, because of the large number ofwheels and the high hardw are sample rate for on-line testing. So in order to promote the efficiency, it isnecessary to change the sample rate for ultrasonic signal to shift the amount of origi- nal data. In thispaper, the featuresofultrasonic data arementioned, the digitalsignalarithmetic of extraction and inter- polation are researched and the sample rate change is mi plemented on the CPLD, the data redundancy are declined and the