The practical results of EMATs preliminary trials showed that this type of transducers become equal to those widely used for contactless UT of various items. At the Scientific- Production Enterprise 'VIGOR' developed are methods and design of EMATs to excite and register ultrasonic waves of various types implemented in the processes of rail-tracks examination. The EMATs provide reliable radiation and registration of acoustic signals at angles of 0, 40 and 60 as well as Relay waves. The noise-to-signal ratio for developed transducers is approximately the same as for piezoelectric ones and this make it possible to provide examination sensitivity (in case when EMATs are used) practically the same as achieved for modern contact methods. The EMA NDT testing method is new and efficient in the field of rail-tracks flaw detection, but at the same time it have wide range of applications, i.e. in the process of: output railtracks quality control conducted by the manufacturers; output / input used rail-tracks quality control conducted by the rails-welding facilities; examination of continuously welded rails after welding works and in the process of rail-tracks diagnostics carried out with the help of fast, mobile testing devices. Beside mentioned above, the EMA method can be used in other branches of industry, for example, in oil and gas industry; air, sea and automobile transportation; at heavy duty production, etc.


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    Title :

    Development of instruments for NDT of rail-tracks with use of contactless electromagnetic acoustic emission transducers (EMATs)


    Additional title:

    Entwicklung von Instrumenten zur ZfP von Schienenwegen mittels berührungsloser elektromagnetisch akustischer Emissionswandler (EMATs)


    Contributors:


    Publication date :

    2008


    Size :

    9 Seiten, 4 Bilder


    Remarks:

    (nicht paginiert)


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English