Electromagnetic ultrasonic transducers (EMUS) do not need liquid couplants; they can be designed to operate at elevated temperatures; they can be scanned at high speeds; and they can be designed and fabricated for a much wider variety of wave modes than piezoelectric probes, especially for modes with tangential polarisation. A disadvantage is the larger insertion loss than that of piezoelectric transducers. However, using an optimised layout of probes and transmitting and receiving electronics yields sufficient power and signal/noise ratio for pipe testing and many other industrial applications. The paper describes the general state of the art and the results of optimisation for in-service inspection of gas pipelines. In particular, the optimisation of linearly polarised shear-wave transducers for vertical and oblique incidence is presented.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Electromagnetic ultrasonic transducers and systems for in-service inspection of gas pipelines


    Additional title:

    Elektromagnetische Ultraschallwandler und Systeme fuer die betriebliche Inspektion von Gaspipelines


    Contributors:


    Publication date :

    1987


    Size :

    4 Seiten, 8 Bilder, 11 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    Ultrasonic instrumentation and transducers for rail inspection

    Small, J. / Brook, C. | Tema Archive | 2002



    Ultrasonic guided wave phased array inspection of pipelines

    Palit Sagar, S. / Hua, Jia Jerry / Rose, Joseph L. | Tema Archive | 2009


    Rapid inspection of artillery projectiles with electromagnetic transducers

    Fortunko, C.M. / Thompson, R.B. | Tema Archive | 1977