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  • 2005-2009  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Acoustic Emission Detection Using a Novel Fibre Optic Sensor (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 13-14 (Feb. 2006), p. 99-104 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A novel fibre optic sensor system has been developed for detection of acoustic emission.The sensor design was based on a 2×2 fused tapered optical fibre coupler configuration. Given theintended use of this sensor for the detection of acoustic emission in smart materials and structures,its lightweight, compatibility with composite material and immunity from electromagneticinterference are great advantages. Apart from the performance specification and reliability, theoverall cost of the sensor system is a major factor in their adoption by end-users. The manufacturingof this sensor is low-cost and the signal output from the sensor system developed can be directly fedto the commercial AE acquisition system. The demonstration of acoustic emission detection wasconducted using fibre coupler-based AE sensors in different materials and structures. The AEsources are various and depend on the different applications. In the current paper, we report on theuse of the fibre optic AE sensor system for concrete damage monitoring. An experiment on damagedetection on a composite plate with this fibre optical AE sensor is also reported in the paper
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.13-14.99.pdf
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Use of Advanced A.E. Analysis for Source Discrimination Using Captured Waveforms (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 13-14 (Feb. 2006), p. 401-406 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conventional methods of acquiring and using acoustic emission (AE) discard the rawsignal waveform after extracting signal features from it. The main reason for this is the number ofbytes required to save hundreds of thousands of AE waveforms, using a modern high speed multichannelsystem the hard-drive may be quickly filled. One side effect of this “feature extraction”approach is that information is thrown away with the wave-form. The advent of systems capable ofacquiring AE waveforms on all channels has opened up the opportunity to use this extra data to getmore information about the source and the transmission path. This paper describes the use ofacoustic emission waveforms to aid source discrimination, and presents data acquired duringpressure testing of a slug-catcher
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.13-14.401.pdf
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Acoustic Emission for Corrosion Detection (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 13-14 (Feb. 2006), p. 231-236 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Corrosion is the major cause of structural degradation in industrial plant and structures;the consequences of not identifying its presence and status can be severe, leading to a myriad ofmethods for its evaluation and monitoring. Amongst these there are a large number based onacoustic methods, and this paper concentrates on three variations involving passive monitoring withthe aim of summarizing their usual area of applications and limitations. Passive monitoring involveslistening to the process of corrosion itself, which usually causes acoustic emission as a result of thefracture and de-bonding of expansive corrosion products, localised yielding, or micro-crackformation. This method is applied to reinforced concrete structures, storage tank floors, and processplant whilst in service
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.13-14.231.pdf
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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