A new algorithm for detecting impact point in anisotropic plates by the acoustic emission technique

Talieh Hajzargarbashi, Tribikram Kundu, Scott Bland

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

5 Citations (Scopus)

Abstract

The wave speed in an anisotropic plate is dependent on the direction of propagation and therefore the conventional triangulation technique does not work for the prediction of the impact point. A method based on the optimization technique was proposed by Kundu et al. to detect the point of impact in an anisotropic plate. They defined an objective function that uses the time of flight information of the ultrasonic signals to the passive transducers attached to the plate and the wave propagation direction (θ) from the impact point to the receiving sensors. This function is very sensitive to the arrival times. A small variation in any one arrival time results in a significant change in the impact point prediction. This shortcoming is overcome here by modifying the objective function and following a new algorithm. Both old and new objective functions (denoted as functions 1 and 2) are used in the new algorithm. This algorithm uses different sets of transducers and identifies the common predictions from different sets. The proposed algorithm is less sensitive to the arrival time variation and thus is capable of predicting the impact point correctly even when the measured arrival time has some error. The objective function 2 is simpler, so the computer code run time is reduced and it is less likely to converge to the local minima when using the simplex or other optimization techniques. The theoretical predictions are compared with experimental results.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7650
EditionPART 1
DOIs
StatePublished - 2010
EventHealth Monitoring of Structural and Biological Systems 2010 - San Diego, CA, United States
Duration: Mar 8 2010Mar 11 2010

Other

OtherHealth Monitoring of Structural and Biological Systems 2010
CountryUnited States
CitySan Diego, CA
Period3/8/103/11/10

Fingerprint

anisotropic plates
point impact
Acoustic Emission
acoustic emission
Acoustic emissions
Arrival Time
Objective function
arrivals
Prediction
Transducer
Optimization Techniques
predictions
Transducers
transducers
Time-of-flight
Wave Speed
optimization
Local Minima
triangulation
Triangulation

Keywords

  • Acoustic Emission
  • Anisotropic
  • Composite Plate
  • Impact
  • Lamb Wave
  • Passive Monitoring

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Hajzargarbashi, T., Kundu, T., & Bland, S. (2010). A new algorithm for detecting impact point in anisotropic plates by the acoustic emission technique. In Proceedings of SPIE - The International Society for Optical Engineering (PART 1 ed., Vol. 7650). [76500C] https://doi.org/10.1117/12.847246

A new algorithm for detecting impact point in anisotropic plates by the acoustic emission technique. / Hajzargarbashi, Talieh; Kundu, Tribikram; Bland, Scott.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7650 PART 1. ed. 2010. 76500C.

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

Hajzargarbashi, T, Kundu, T & Bland, S 2010, A new algorithm for detecting impact point in anisotropic plates by the acoustic emission technique. in Proceedings of SPIE - The International Society for Optical Engineering. PART 1 edn, vol. 7650, 76500C, Health Monitoring of Structural and Biological Systems 2010, San Diego, CA, United States, 3/8/10. https://doi.org/10.1117/12.847246
Hajzargarbashi T, Kundu T, Bland S. A new algorithm for detecting impact point in anisotropic plates by the acoustic emission technique. In Proceedings of SPIE - The International Society for Optical Engineering. PART 1 ed. Vol. 7650. 2010. 76500C https://doi.org/10.1117/12.847246
Hajzargarbashi, Talieh ; Kundu, Tribikram ; Bland, Scott. / A new algorithm for detecting impact point in anisotropic plates by the acoustic emission technique. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7650 PART 1. ed. 2010.
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