Development of DMPS-EMAT for Long-Distance Monitoring of Broken Rail
The safety of railway transportation is crucial to social and economic development. Therefore, real-time monitoring of the rail is particularly necessary. The current track circuit structure is complex and costly, posing challenges to monitoring broken tracks using alternative methods. As a non-cont...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/12/5583 |
| _version_ | 1797592672603471872 |
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| author | Wujun Guo Zhiyang Yu Hsiang-Chen Chui Xiaoming Chen |
| author_facet | Wujun Guo Zhiyang Yu Hsiang-Chen Chui Xiaoming Chen |
| author_sort | Wujun Guo |
| collection | DOAJ |
| description | The safety of railway transportation is crucial to social and economic development. Therefore, real-time monitoring of the rail is particularly necessary. The current track circuit structure is complex and costly, posing challenges to monitoring broken tracks using alternative methods. As a non-contact detection technology with a lower environmental impact, electromagnetic ultrasonic transducers (EMATs) have become a concern. However, traditional EMATs have problems such as low conversion efficiency and complex modes, which can limit their effectiveness for long-distance monitoring. Therefore, this study introduces a novel dual-magnet phase-stacked EMAT (DMPS-EMAT) design comprising two magnets and a dual-layer winding coil arrangement. The magnets are positioned at a distance equal to the wavelength of the A0 wave from each other, while the center distance between the two sets of coils beneath the transducer is also equal to the wavelength. After analyzing the dispersion curves of the rail waist, it was determined that the optimal frequency for long-distance rail monitoring is 35 kHz. At this frequency, adjusting the relative positions of the two magnets and the coil directly underneath to be one A0 wavelength can effectively excite a constructive interference A0 wave in the rail waist. The simulation and experimental results show that DMPS-EMAT excited a single-mode A0 wave, resulting in a 1.35-times increase in amplitude. |
| first_indexed | 2024-03-11T01:57:25Z |
| format | Article |
| id | doaj.art-d0635f44c6cd410b8e5606f7af385a48 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T01:57:25Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-d0635f44c6cd410b8e5606f7af385a482023-11-18T12:33:09ZengMDPI AGSensors1424-82202023-06-012312558310.3390/s23125583Development of DMPS-EMAT for Long-Distance Monitoring of Broken RailWujun Guo0Zhiyang Yu1Hsiang-Chen Chui2Xiaoming Chen3School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116000, ChinaSignal & Communication Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, ChinaSchool of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116000, ChinaSchool of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116000, ChinaThe safety of railway transportation is crucial to social and economic development. Therefore, real-time monitoring of the rail is particularly necessary. The current track circuit structure is complex and costly, posing challenges to monitoring broken tracks using alternative methods. As a non-contact detection technology with a lower environmental impact, electromagnetic ultrasonic transducers (EMATs) have become a concern. However, traditional EMATs have problems such as low conversion efficiency and complex modes, which can limit their effectiveness for long-distance monitoring. Therefore, this study introduces a novel dual-magnet phase-stacked EMAT (DMPS-EMAT) design comprising two magnets and a dual-layer winding coil arrangement. The magnets are positioned at a distance equal to the wavelength of the A0 wave from each other, while the center distance between the two sets of coils beneath the transducer is also equal to the wavelength. After analyzing the dispersion curves of the rail waist, it was determined that the optimal frequency for long-distance rail monitoring is 35 kHz. At this frequency, adjusting the relative positions of the two magnets and the coil directly underneath to be one A0 wavelength can effectively excite a constructive interference A0 wave in the rail waist. The simulation and experimental results show that DMPS-EMAT excited a single-mode A0 wave, resulting in a 1.35-times increase in amplitude.https://www.mdpi.com/1424-8220/23/12/5583EMATsingle-mode A0 waveconstructive interferencesignal enhancement |
| spellingShingle | Wujun Guo Zhiyang Yu Hsiang-Chen Chui Xiaoming Chen Development of DMPS-EMAT for Long-Distance Monitoring of Broken Rail Sensors EMAT single-mode A0 wave constructive interference signal enhancement |
| title | Development of DMPS-EMAT for Long-Distance Monitoring of Broken Rail |
| title_full | Development of DMPS-EMAT for Long-Distance Monitoring of Broken Rail |
| title_fullStr | Development of DMPS-EMAT for Long-Distance Monitoring of Broken Rail |
| title_full_unstemmed | Development of DMPS-EMAT for Long-Distance Monitoring of Broken Rail |
| title_short | Development of DMPS-EMAT for Long-Distance Monitoring of Broken Rail |
| title_sort | development of dmps emat for long distance monitoring of broken rail |
| topic | EMAT single-mode A0 wave constructive interference signal enhancement |
| url | https://www.mdpi.com/1424-8220/23/12/5583 |
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