Evaluation of coded excitations for autonomous airborne ultrasonic inspection

Research output: Contribution to conferencePaper

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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.
Original languageEnglish
Number of pages4
DOIs
Publication statusPublished - 6 Oct 2019
Event2019 IEEE International Ultrasonics Symposium - Glasgow, United Kingdom
Duration: 6 Oct 20199 Oct 2019

Conference

Conference2019 IEEE International Ultrasonics Symposium
Abbreviated titleIUS 2019
CountryUnited Kingdom
CityGlasgow
Period6/10/199/10/19

Fingerprint

Inspection
Ultrasonics
Unmanned aerial vehicles (UAV)
Nondestructive examination
Signal to noise ratio
Ultrasonic measurement
Binary codes
Ultrasonic transducers
Thickness measurement
Structural integrity
Transducers
Aerodynamics
Health
Corrosion
Electric potential

Keywords

  • coded excitation
  • ultrasonic inspection
  • UAV

Cite this

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title = "Evaluation of coded excitations for autonomous airborne ultrasonic inspection",
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.",
keywords = "coded excitation, ultrasonic inspection, UAV",
author = "Dayi Zhang and Robert Watson and Gordon Dobie and Charles MacLeod and David Lines and Walter Galbraith and Carmelo Mineo and Gareth Pierce",
note = "{\circledC} 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. ; 2019 IEEE International Ultrasonics Symposium, IUS 2019 ; Conference date: 06-10-2019 Through 09-10-2019",
year = "2019",
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doi = "10.1109/ULTSYM.2019.8926048",
language = "English",

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Zhang, D, Watson, R, Dobie, G, MacLeod, C, Lines, D, Galbraith, W, Mineo, C & Pierce, G 2019, 'Evaluation of coded excitations for autonomous airborne ultrasonic inspection' Paper presented at 2019 IEEE International Ultrasonics Symposium, Glasgow, United Kingdom, 6/10/19 - 9/10/19, . https://doi.org/10.1109/ULTSYM.2019.8926048

Evaluation of coded excitations for autonomous airborne ultrasonic inspection. / Zhang, Dayi; Watson, Robert; Dobie, Gordon; MacLeod, Charles; Lines, David; Galbraith, Walter; Mineo, Carmelo; Pierce, Gareth.

2019. Paper presented at 2019 IEEE International Ultrasonics Symposium, Glasgow, United Kingdom.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Evaluation of coded excitations for autonomous airborne ultrasonic inspection

AU - Zhang, Dayi

AU - Watson, Robert

AU - Dobie, Gordon

AU - MacLeod, Charles

AU - Lines, David

AU - Galbraith, Walter

AU - Mineo, Carmelo

AU - Pierce, Gareth

N1 - © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2019/10/6

Y1 - 2019/10/6

N2 - 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.

AB - 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.

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Zhang D, Watson R, Dobie G, MacLeod C, Lines D, Galbraith W et al. Evaluation of coded excitations for autonomous airborne ultrasonic inspection. 2019. Paper presented at 2019 IEEE International Ultrasonics Symposium, Glasgow, United Kingdom. https://doi.org/10.1109/ULTSYM.2019.8926048