Evaluation of Coded Excitations for Autonomous Airborne Ultrasonic Inspection

Carmelo Mineo, Gordon Dobie, Carmelo Mineo, Charles Macleod, Dayi Zhang, Robert Watson, Gareth Pierce, Walter Galbraith, David Lines

Risultato della ricerca: Conference contribution

1 Citazioni (Scopus)

Abstract

Unmanned Aerial Vehicles (UAVs) are receiving increasing attention for use in Non-Destructive Testing due to their ability to access areas where manual inspection is not practical. Contact-based UAV ultrasonic inspections grant the opportunity to remotely monitor the structural health of an industrial asset with enhanced internal integrity information. Ultrasonic inspection is a Non-Destructive Testing (NDT) method conventionally used in corrosion mapping. Surface contacting ultrasonic transducers provide enhanced structural integrity information. However, due to near-surface aerodynamic effects, angular sensitivity of the ultrasound probe and alignment error during autonomous inspections, ultrasonic thickness measurements with low Signal-to-Noise Ratio (SNR) are common. Coded excitation consists of a series of binary bits, whereby the polarity of the voltage is varied following a set excitation sequence to produce desirable signal properties. Here, coded excitation is utilised to increase SNR and thereby reduce measurement uncertainty originating from non-ideal transducer alignment with asset surfaces during inspections. This paper evaluates the performance of two binary code sequences (8-bit Golay, 13-bit Barker) for use in autonomous airborne inspections.
Lingua originaleEnglish
Titolo della pubblicazione ospiteIEEE International Ultrasonics Symposium, IUS
Pagine2461-2464
Numero di pagine4
Stato di pubblicazionePublished - 2019

Serie di pubblicazioni

NomeIEEE INTERNATIONAL ULTRASONICS SYMPOSIUM

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Fingerprint Entra nei temi di ricerca di 'Evaluation of Coded Excitations for Autonomous Airborne Ultrasonic Inspection'. Insieme formano una fingerprint unica.

Cita questo