A Wireless Passive Pressure-Sensing Method for Cryogenic Applications Using Magnetoresistors
In this study, we developed a novel wireless, passive pressure-sensing method functional at cryogenic temperatures (−196 °C). The currently used pressure sensors are inconvenient and complicated in cryogenic environments for their weak low-temperature tolerances and long wires for power supply and d...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/24/3/717 |
| _version_ | 1827354561314029568 |
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| author | Ziqi Zhao Michitaka Yamamoto Seiichi Takamatsu Toshihiro Itoh |
| author_facet | Ziqi Zhao Michitaka Yamamoto Seiichi Takamatsu Toshihiro Itoh |
| author_sort | Ziqi Zhao |
| collection | DOAJ |
| description | In this study, we developed a novel wireless, passive pressure-sensing method functional at cryogenic temperatures (−196 °C). The currently used pressure sensors are inconvenient and complicated in cryogenic environments for their weak low-temperature tolerances and long wires for power supply and data transmission. We propose a novel pressure-sensing method for cryogenic applications by only using low-temperature-tolerant passive devices. By innovatively integrating a magnetoresistor (MR) on a backscattering antenna, the pressure inside a cryogenic environment is transferred to a wirelessly obtainable return loss. Wireless passive measurement is thus achieved using a backscattering method. In the measurement, the pressure causes a relative displacement between the MR and a magnet. The MR’s resistance changes with the varied magnetic field, thus modulating the antenna’s return loss. The experimental results indicate that our fabricated sensor successfully identified different pressures, with high sensitivities of 4.3 dB/MPa at room temperature (24 °C) and 1.3 dB/MPa at cryogenic temperature (−196 °C). Additionally, our method allows for simultaneous wireless readings of multi sensors via a single reading device by separating the frequency band of each sensor. Our method performs low-cost, simple, robust, passive, and wireless pressure measurement at −196 °C; thus, it is desirable for cryogenic applications. |
| first_indexed | 2024-03-08T03:49:26Z |
| format | Article |
| id | doaj.art-12eb9b10494641449b0209124d195df5 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-08T03:49:26Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-12eb9b10494641449b0209124d195df52024-02-09T15:21:37ZengMDPI AGSensors1424-82202024-01-0124371710.3390/s24030717A Wireless Passive Pressure-Sensing Method for Cryogenic Applications Using MagnetoresistorsZiqi Zhao0Michitaka Yamamoto1Seiichi Takamatsu2Toshihiro Itoh3Department of Precision Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, JapanDepartment of Precision Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, JapanDepartment of Precision Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, JapanDepartment of Precision Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, JapanIn this study, we developed a novel wireless, passive pressure-sensing method functional at cryogenic temperatures (−196 °C). The currently used pressure sensors are inconvenient and complicated in cryogenic environments for their weak low-temperature tolerances and long wires for power supply and data transmission. We propose a novel pressure-sensing method for cryogenic applications by only using low-temperature-tolerant passive devices. By innovatively integrating a magnetoresistor (MR) on a backscattering antenna, the pressure inside a cryogenic environment is transferred to a wirelessly obtainable return loss. Wireless passive measurement is thus achieved using a backscattering method. In the measurement, the pressure causes a relative displacement between the MR and a magnet. The MR’s resistance changes with the varied magnetic field, thus modulating the antenna’s return loss. The experimental results indicate that our fabricated sensor successfully identified different pressures, with high sensitivities of 4.3 dB/MPa at room temperature (24 °C) and 1.3 dB/MPa at cryogenic temperature (−196 °C). Additionally, our method allows for simultaneous wireless readings of multi sensors via a single reading device by separating the frequency band of each sensor. Our method performs low-cost, simple, robust, passive, and wireless pressure measurement at −196 °C; thus, it is desirable for cryogenic applications.https://www.mdpi.com/1424-8220/24/3/717pressure sensingcryogenicmagnetoresistorbackscatteringwirelesspassive |
| spellingShingle | Ziqi Zhao Michitaka Yamamoto Seiichi Takamatsu Toshihiro Itoh A Wireless Passive Pressure-Sensing Method for Cryogenic Applications Using Magnetoresistors Sensors pressure sensing cryogenic magnetoresistor backscattering wireless passive |
| title | A Wireless Passive Pressure-Sensing Method for Cryogenic Applications Using Magnetoresistors |
| title_full | A Wireless Passive Pressure-Sensing Method for Cryogenic Applications Using Magnetoresistors |
| title_fullStr | A Wireless Passive Pressure-Sensing Method for Cryogenic Applications Using Magnetoresistors |
| title_full_unstemmed | A Wireless Passive Pressure-Sensing Method for Cryogenic Applications Using Magnetoresistors |
| title_short | A Wireless Passive Pressure-Sensing Method for Cryogenic Applications Using Magnetoresistors |
| title_sort | wireless passive pressure sensing method for cryogenic applications using magnetoresistors |
| topic | pressure sensing cryogenic magnetoresistor backscattering wireless passive |
| url | https://www.mdpi.com/1424-8220/24/3/717 |
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