Abstract
To obtain an ideal wide-band elastic wave source for acoustic emission sensor calibration at low frequency, different kinds of sources including resonant transducers and lead breaking were tried. The velocity spectrums measured by the laser vibrometer were compared, and the transducer with the resonant frequency at around 250 kHz was found to be suitable for the AE sensor calibration at less than 100 kHz, and the peak frequency could be found correctly without any spectrum modification for the elastic wave source. The traceability of pressure sensitivity (dB re 1 V/μbar) of AE sensors was also discussed according to the air-borne measurement.
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References
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Acknowledgment
Natural Science Foundation of China (Nos. 51205378 and 51575502) and Special Fund for Scientific Research in Public Interest (201310010).
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He, L., Wang, M., Kang, J., Yang, P. (2019). Discussion on Elastic Wave Sources for AE Sensor Calibration at Low Frequency. In: Shen, G., Zhang, J., Wu, Z. (eds) Advances in Acoustic Emission Technology. WCAE 2017. Springer Proceedings in Physics, vol 218. Springer, Cham. https://doi.org/10.1007/978-3-030-12111-2_1
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DOI: https://doi.org/10.1007/978-3-030-12111-2_1
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