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Signal Compression in Automatic Ultrasonic testing of Rails

Author(s): Tomasz Ciszewski | Zbigniew Lukasik

Journal: Advances in Electrical and Electronic Engineering
ISSN 1336-1376

Volume: 6;
Issue: 2;
Start page: 55;
Date: 2007;
Original page

Keywords: Ultrasonic signals | data compression | statistical analysis.

Full recording of the most important information carried by the ultrasonic signals allows realizing statistical analysis of measurement data. Statistical analysis of the results gathered during automatic ultrasonic tests gives data which lead, together with use of features of measuring method, differential lossy coding and traditional method of lossless data compression (Huffman’s coding, dictionary coding), to a comprehensive, efficient data compression algorithm. The subject of the article is to present the algorithm and the benefits got by using it in comparison to alternative compression methods. Storage of large amount  of data allows to create an electronic catalogue of ultrasonic defects. If it is created, the future qualification system training in the new solutions of the automat for test in rails will be possible.
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