Sensors 2017, 17(5), 1178; doi:10.3390/s17051178
Impact Damage Localisation with Piezoelectric Sensors under Operational and Environmental Conditions
Department of Aeronautics, Imperial College London, Kensington, London SW7 2AZ, UK
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Academic Editor: Vittorio M. N. Passaro
Received: 29 March 2017 / Revised: 15 May 2017 / Accepted: 16 May 2017 / Published: 22 May 2017
(This article belongs to the Special Issue Sensor Technologies for Health Monitoring of Composite Structures)
Abstract
Guided-wave structural health monitoring (SHM) systems with piezoelectric sensors are investigated for localisation of barely visible impact damage in CFRP plates under vibration and different thermal conditions. A single baseline set is used in a delay-and-sum algorithm with temperature correction for damage localisation in a large temperature range. Damage localisation is also demonstrated under transient thermal conditions, with signals recorded while the temperature is rapidly decreased. Damage severity due to successive impact events is studied under constant temperature. Damage is also localised when the plate is subjected to random vibration. View Full-TextKeywords:
structural health monitoring; temperature compensation; Lamb wave; CFRP; delay and sum; piezoelectric; vibration
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Salmanpour, M.S.; Sharif Khodaei, Z.; Aliabadi, M.H.F. Impact Damage Localisation with Piezoelectric Sensors under Operational and Environmental Conditions. Sensors 2017, 17, 1178.
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