Design and Manufacture of an Optimised Side-Shifted PPM EMAT Array for Use in Mobile Robotic Localisation
Guided wave Electro Magnetic Acoustic Transducers (EMATs) offer an elegant method for structural inspection and localisation relative to geometric features, such as welds. This paper presents a Lorentz force EMAT construction framework, where a numerical model has been developed for optimising Print...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/4/2012 |
| _version_ | 1797618279010795520 |
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| author | Ross McMillan Rory Hampson Morteza Tabatabaeipour William Jackson Dayi Zhang Konstantinos Tzaferis Gordon Dobie |
| author_facet | Ross McMillan Rory Hampson Morteza Tabatabaeipour William Jackson Dayi Zhang Konstantinos Tzaferis Gordon Dobie |
| author_sort | Ross McMillan |
| collection | DOAJ |
| description | Guided wave Electro Magnetic Acoustic Transducers (EMATs) offer an elegant method for structural inspection and localisation relative to geometric features, such as welds. This paper presents a Lorentz force EMAT construction framework, where a numerical model has been developed for optimising Printed Circuit Board (PCB) coil parameters as well as a methodology for optimising magnet array parameters to a user’s needs. This framework was validated experimentally to show its effectiveness through comparison to an industry built EMAT. The framework was then used to design and manufacture a Side-Shifted Unidirectional Periodic Permanent Magnet (PPM) EMAT for use on a mobile robotic system, which uses guided waves for ranging to build internal maps of a given subject, identifying welded sections, defects and other structural elements. The unidirectional transducer setup was shown to operate in simulation and was then manufactured to compare to the bidirectional transmitter and two-receiver configurations on a localisation system. The unidirectional setup was shown to have clear benefits over the bidirectional setup for mapping an unknown environment using guided waves as there were no dead spots of mapping where signal direction could not be interpreted. Additionally, overall package size was significantly reduced, which in turn allows more measurements to be taken within confined spaces and increases robotic crawler mobility. |
| first_indexed | 2024-03-11T08:10:49Z |
| format | Article |
| id | doaj.art-67540419f7ef409686e1fafbc193cc13 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T08:10:49Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-67540419f7ef409686e1fafbc193cc132023-11-16T23:09:10ZengMDPI AGSensors1424-82202023-02-01234201210.3390/s23042012Design and Manufacture of an Optimised Side-Shifted PPM EMAT Array for Use in Mobile Robotic LocalisationRoss McMillan0Rory Hampson1Morteza Tabatabaeipour2William Jackson3Dayi Zhang4Konstantinos Tzaferis5Gordon Dobie6Centre of Ultrasonic Engineering, University of Strathclyde, Glasgow G1 1XQ, UKCentre of Ultrasonic Engineering, University of Strathclyde, Glasgow G1 1XQ, UKCentre of Ultrasonic Engineering, University of Strathclyde, Glasgow G1 1XQ, UKCentre of Ultrasonic Engineering, University of Strathclyde, Glasgow G1 1XQ, UKCentre of Ultrasonic Engineering, University of Strathclyde, Glasgow G1 1XQ, UKCentre of Ultrasonic Engineering, University of Strathclyde, Glasgow G1 1XQ, UKCentre of Ultrasonic Engineering, University of Strathclyde, Glasgow G1 1XQ, UKGuided wave Electro Magnetic Acoustic Transducers (EMATs) offer an elegant method for structural inspection and localisation relative to geometric features, such as welds. This paper presents a Lorentz force EMAT construction framework, where a numerical model has been developed for optimising Printed Circuit Board (PCB) coil parameters as well as a methodology for optimising magnet array parameters to a user’s needs. This framework was validated experimentally to show its effectiveness through comparison to an industry built EMAT. The framework was then used to design and manufacture a Side-Shifted Unidirectional Periodic Permanent Magnet (PPM) EMAT for use on a mobile robotic system, which uses guided waves for ranging to build internal maps of a given subject, identifying welded sections, defects and other structural elements. The unidirectional transducer setup was shown to operate in simulation and was then manufactured to compare to the bidirectional transmitter and two-receiver configurations on a localisation system. The unidirectional setup was shown to have clear benefits over the bidirectional setup for mapping an unknown environment using guided waves as there were no dead spots of mapping where signal direction could not be interpreted. Additionally, overall package size was significantly reduced, which in turn allows more measurements to be taken within confined spaces and increases robotic crawler mobility.https://www.mdpi.com/1424-8220/23/4/2012PPM EMATsguided wavesranging and mappingshear horizontalunidirectional |
| spellingShingle | Ross McMillan Rory Hampson Morteza Tabatabaeipour William Jackson Dayi Zhang Konstantinos Tzaferis Gordon Dobie Design and Manufacture of an Optimised Side-Shifted PPM EMAT Array for Use in Mobile Robotic Localisation Sensors PPM EMATs guided waves ranging and mapping shear horizontal unidirectional |
| title | Design and Manufacture of an Optimised Side-Shifted PPM EMAT Array for Use in Mobile Robotic Localisation |
| title_full | Design and Manufacture of an Optimised Side-Shifted PPM EMAT Array for Use in Mobile Robotic Localisation |
| title_fullStr | Design and Manufacture of an Optimised Side-Shifted PPM EMAT Array for Use in Mobile Robotic Localisation |
| title_full_unstemmed | Design and Manufacture of an Optimised Side-Shifted PPM EMAT Array for Use in Mobile Robotic Localisation |
| title_short | Design and Manufacture of an Optimised Side-Shifted PPM EMAT Array for Use in Mobile Robotic Localisation |
| title_sort | design and manufacture of an optimised side shifted ppm emat array for use in mobile robotic localisation |
| topic | PPM EMATs guided waves ranging and mapping shear horizontal unidirectional |
| url | https://www.mdpi.com/1424-8220/23/4/2012 |
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