Design of Electromagnetic Ultrasonic Data Acquisition and Analysis System Based on USB

Zhitao Jiang, Pingkuan Liu and Bo Zhang

Modern Applied Science, 2010, vol. 4, issue 12, 36

Abstract: Aiming at weakness and diversity characteristics of electromagnetic ultrasonic signals and demand of portable devices based on electromagnetic acoustic transducer(EMAT), an electromagnetic ultrasonic data acquisition and analysis system was designed. Data exchange between computer and acquisition circuits was realized through USB. Controls of electromagnetic ultrasonic transmit/receive circuits and acquisition of echo data were implemented utilizing FPGA. Software was developed by LabWindows CVI. Experiment showed that the system not only had comparatively high sampling rate and accuracy, but was also very easy to use.

Date: 2010
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