An improved technique for locating the point of impact from the acoustic emission data

Tribikram Kundu, Samik Das, Kumar V. Jata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

21 Citations (Scopus)

Abstract

Triangulation technique for impact point location works very well when the acoustic emission sensors are placed at a relatively large distance from the point of impact. In this situation the time of arrival measurement is not affected significantly by the small error that might arise from not being able to pinpoint the exact time of arrival of the acoustic signal. The conventional technique also requires that the wave speed in the medium is well-known and non-dispersive in the frequency range of interest. If the receiving wave is a P-wave or S-wave or a non-dispersive Rayleigh wave then the conventional triangulation technique is reliable. In this paper it is shown that the conventional triangulation technique is not very reliable for locating the impact point in a plate when the sensors are placed close to the striking point for two reasons - first, it is difficult to pin point the exact time of arrival of the signal and secondly the Lamb modes in a plate are dispersive. Dispersive signals attenuate differently at various frequencies and propagate with different speeds causing distortions in the received signals and thus introduce more error in the time of flight measurement. In this paper an alternative approach is proposed to locate the impact point more accurately. Experiments are carried out with an aluminum plate. The impact points predicted by the conventional triangulation technique and the proposed modified method are compared.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6532
DOIs
StatePublished - 2007
EventHealth Monitoring of Structural and Biological Systems 2007 - San Diego, CA, United States
Duration: Mar 19 2007Mar 22 2007

Other

OtherHealth Monitoring of Structural and Biological Systems 2007
CountryUnited States
CitySan Diego, CA
Period3/19/073/22/07

Fingerprint

point impact
triangulation
acoustic emission
Triangulation
Acoustic emissions
arrivals
Rayleigh waves
sensors
Sensors
P waves
S waves
frequency ranges
Acoustics
aluminum
Aluminum
acoustics
Time of arrival
Experiments

Keywords

  • Acoustic emission
  • Lamb wave
  • Passive monitoring
  • Point of impact
  • Triangulation technique

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Kundu, T., Das, S., & Jata, K. V. (2007). An improved technique for locating the point of impact from the acoustic emission data. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6532). [65320M] https://doi.org/10.1117/12.730228

An improved technique for locating the point of impact from the acoustic emission data. / Kundu, Tribikram; Das, Samik; Jata, Kumar V.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6532 2007. 65320M.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kundu, T, Das, S & Jata, KV 2007, An improved technique for locating the point of impact from the acoustic emission data. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6532, 65320M, Health Monitoring of Structural and Biological Systems 2007, San Diego, CA, United States, 3/19/07. https://doi.org/10.1117/12.730228
Kundu T, Das S, Jata KV. An improved technique for locating the point of impact from the acoustic emission data. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6532. 2007. 65320M https://doi.org/10.1117/12.730228
Kundu, Tribikram ; Das, Samik ; Jata, Kumar V. / An improved technique for locating the point of impact from the acoustic emission data. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6532 2007.
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