Range Extension of Borehole Strainmeters Using MOSFET-Based Multi-Switch Automatic Zero Setting
Borehole strainmeters are essential tools for observing crustal deformation. In long-term observational applications, the dynamic changes in crustal deformation over multi-year scales often exceed the single measurement range of borehole strainmeters. Expanding the measurement range while maintainin...
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| Language: | English |
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MDPI AG
2025-01-01
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| Online Access: | https://www.mdpi.com/1424-8220/25/2/476 |
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| author | Chen Yang Zheng Chen Hong Li Wenbo Wang Weiwei Zhan Liheng Wu Yunkai Dong Jiaxin Chen |
| author_facet | Chen Yang Zheng Chen Hong Li Wenbo Wang Weiwei Zhan Liheng Wu Yunkai Dong Jiaxin Chen |
| author_sort | Chen Yang |
| collection | DOAJ |
| description | Borehole strainmeters are essential tools for observing crustal deformation. In long-term observational applications, the dynamic changes in crustal deformation over multi-year scales often exceed the single measurement range of borehole strainmeters. Expanding the measurement range while maintaining high precision is a critical technical challenge. To address this, a full-range measurement system was developed using a bidirectional analog multi-switch based on MOS transistors and automatic feedback control. This system automatically adjusts the zero point of the measurement bridge, maintaining the bridge output at a near-balanced state. The quantifiable zero-setting actions are dynamically converted into equivalent voltage, enabling automatic full-range measurements while fully utilizing the effective linear range of the differential capacitive sensors. A laboratory performance tests demonstrated that an RZB borehole strainmeter equipped with this automatic zero-setting range extension system successfully covers the differential capacitive sensor’s effective linear range of approximately 100 μm. |
| format | Article |
| id | doaj-art-e51ee31c4e54432da92b8c824e8268e4 |
| institution | Kabale University |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-e51ee31c4e54432da92b8c824e8268e42025-01-24T13:49:04ZengMDPI AGSensors1424-82202025-01-0125247610.3390/s25020476Range Extension of Borehole Strainmeters Using MOSFET-Based Multi-Switch Automatic Zero SettingChen Yang0Zheng Chen1Hong Li2Wenbo Wang3Weiwei Zhan4Liheng Wu5Yunkai Dong6Jiaxin Chen7National Institute of Natural Hazards, Beijing 100085, ChinaNational Institute of Natural Hazards, Beijing 100085, ChinaNational Institute of Natural Hazards, Beijing 100085, ChinaNational Institute of Natural Hazards, Beijing 100085, ChinaNational Institute of Natural Hazards, Beijing 100085, ChinaNational Institute of Natural Hazards, Beijing 100085, ChinaNational Institute of Natural Hazards, Beijing 100085, ChinaNational Institute of Natural Hazards, Beijing 100085, ChinaBorehole strainmeters are essential tools for observing crustal deformation. In long-term observational applications, the dynamic changes in crustal deformation over multi-year scales often exceed the single measurement range of borehole strainmeters. Expanding the measurement range while maintaining high precision is a critical technical challenge. To address this, a full-range measurement system was developed using a bidirectional analog multi-switch based on MOS transistors and automatic feedback control. This system automatically adjusts the zero point of the measurement bridge, maintaining the bridge output at a near-balanced state. The quantifiable zero-setting actions are dynamically converted into equivalent voltage, enabling automatic full-range measurements while fully utilizing the effective linear range of the differential capacitive sensors. A laboratory performance tests demonstrated that an RZB borehole strainmeter equipped with this automatic zero-setting range extension system successfully covers the differential capacitive sensor’s effective linear range of approximately 100 μm.https://www.mdpi.com/1424-8220/25/2/476borehole strainmeterrange extensionautomatic controlfield-effect transistor |
| spellingShingle | Chen Yang Zheng Chen Hong Li Wenbo Wang Weiwei Zhan Liheng Wu Yunkai Dong Jiaxin Chen Range Extension of Borehole Strainmeters Using MOSFET-Based Multi-Switch Automatic Zero Setting Sensors borehole strainmeter range extension automatic control field-effect transistor |
| title | Range Extension of Borehole Strainmeters Using MOSFET-Based Multi-Switch Automatic Zero Setting |
| title_full | Range Extension of Borehole Strainmeters Using MOSFET-Based Multi-Switch Automatic Zero Setting |
| title_fullStr | Range Extension of Borehole Strainmeters Using MOSFET-Based Multi-Switch Automatic Zero Setting |
| title_full_unstemmed | Range Extension of Borehole Strainmeters Using MOSFET-Based Multi-Switch Automatic Zero Setting |
| title_short | Range Extension of Borehole Strainmeters Using MOSFET-Based Multi-Switch Automatic Zero Setting |
| title_sort | range extension of borehole strainmeters using mosfet based multi switch automatic zero setting |
| topic | borehole strainmeter range extension automatic control field-effect transistor |
| url | https://www.mdpi.com/1424-8220/25/2/476 |
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