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26 January 2016 Discussion on the absolute calibration of piezoelectric acoustic emission sensors
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Proceedings Volume 9903, Seventh International Symposium on Precision Mechanical Measurements; 99030M (2016) https://doi.org/10.1117/12.2211274
Event: Seventh International Symposium on Precision Mechanical Measurements, 2015, Xia'men, China
Abstract
The calibration of acoustic emission sensor is important for acoustic emission quantitative evaluation. To carry out the sensor calibration, one way is to find a reference acoustic emission source, such as a falling solid ball, a fracturing pencil lead, with energy evaluation to obtain the characteristics of the reference source. One way is to use a reference sensor to measure the pressure or the normal velocity at the surface, including the capacitive transducer and the laser interferometer. The other is using reciprocity method. Frequency characteristics of amplitude of absolute sensitivity of both the Rayleigh and longitudinal waves could be determined by purely electrical measurement without the use of mechanical sound sources of reference transducers. In this paper, the progress of the methods of the AE sensor calibration was given. The principles and the merits and faults of each method are discussed. In this paper the rapid calibration method by pulse exciting transducer was also discussed in different wave mode, as well as Face to Face method.
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Longbiao He, Yuying Wang, Haijiang Zhu, and Ping Yang "Discussion on the absolute calibration of piezoelectric acoustic emission sensors", Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 99030M (26 January 2016); https://doi.org/10.1117/12.2211274
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