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Multichannel Real-Time Electronics Platform for the Estimation of the Error in Impact Localization with Different Piezoelectric Sensor Densities

Department of Information Engineering, University of Florence, 50139 Florence, Italy
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This paper is an extended version of our paper published in A. Bulletti, E. M. Merlo and L. Capineri, “Analysis of the accuracy in impact localization using piezoelectric sensors for Structural Health Monitoring with multichannel real-time electronics,” 2020 IEEE 7th International Workshop on Metrology for AeroSpace (MetroAeroSpace), Pisa, Italy, 22–24 June 2020.
Academic Editor: Habil. Michel Darmon
Appl. Sci. 2021, 11(9), 4027; https://doi.org/10.3390/app11094027
Received: 26 March 2021 / Revised: 21 April 2021 / Accepted: 27 April 2021 / Published: 28 April 2021
(This article belongs to the Special Issue Ultrasonic Modelling for Non-destructive Testing)
The work presents a structural health monitoring (SHM) electronic system with real-time acquisition and processing for the determination of impact location in laminate. The novelty of this work is the quantitative evaluation of impact location errors using the Lamb wave guided mode S0, captured and processed in real-time by up to eight piezoelectric sensors. The differential time of arrival is used to minimize an error function for the position estimation. The impact energy is correlated to the amplitudes of the antisymmetric (A0) mode and the electronic design is described to avoid saturation for signal acquisition. The same electronic system is designed to acquire symmetric (S0) low level signals by adequate gain, bandwidth, and signal-to-noise ratio. Such signals propagate into a 1.4 mm thick aluminum laminate at the group velocity of 5150 m/s with frequency components above 270 kHz, and can be discriminated from the A0 mode to calculate accurately the differential arrival time. The results show that the localization error stabilizes at a value comparable with the wavelength of the S0 mode by increasing the number of sensors up to six, and then remains constant at up to eight sensors. This suggests that a compromise can be found between sensor density and localization error. View Full-Text
Keywords: real-time electronics; structural health monitoring; Lamb wave; piezoelectric sensors; impact localization; ultrasonic guided waves real-time electronics; structural health monitoring; Lamb wave; piezoelectric sensors; impact localization; ultrasonic guided waves
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MDPI and ACS Style

Capineri, L.; Bulletti, A.; Marino Merlo, E. Multichannel Real-Time Electronics Platform for the Estimation of the Error in Impact Localization with Different Piezoelectric Sensor Densities. Appl. Sci. 2021, 11, 4027. https://doi.org/10.3390/app11094027

AMA Style

Capineri L, Bulletti A, Marino Merlo E. Multichannel Real-Time Electronics Platform for the Estimation of the Error in Impact Localization with Different Piezoelectric Sensor Densities. Applied Sciences. 2021; 11(9):4027. https://doi.org/10.3390/app11094027

Chicago/Turabian Style

Capineri, Lorenzo; Bulletti, Andrea; Marino Merlo, Eugenio. 2021. "Multichannel Real-Time Electronics Platform for the Estimation of the Error in Impact Localization with Different Piezoelectric Sensor Densities" Appl. Sci. 11, no. 9: 4027. https://doi.org/10.3390/app11094027

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