Quasi-Static Current Measurement with Field-Modulated Spin-Valve GMR Sensors
A non-contact current measurement device comprised of a GMR sensor and a ferrite ring core was investigated. The sensor chip employed a high-sensitivity spin-valve full-bridge GMR sensor of which the direct output has non-negligible hysteresis and a limited linear range. By applying an AC modulation...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-04-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/19/8/1882 |
| _version_ | 1798002890981244928 |
|---|---|
| author | Jen-Tzong Jeng Xuan-Thang Trinh Chih-Hsien Hung Chih-Cheng Lu |
| author_facet | Jen-Tzong Jeng Xuan-Thang Trinh Chih-Hsien Hung Chih-Cheng Lu |
| author_sort | Jen-Tzong Jeng |
| collection | DOAJ |
| description | A non-contact current measurement device comprised of a GMR sensor and a ferrite ring core was investigated. The sensor chip employed a high-sensitivity spin-valve full-bridge GMR sensor of which the direct output has non-negligible hysteresis and a limited linear range. By applying an AC modulation current to modulate the output of the GMR sensor, the hysteresis was reduced, and the linear range was over ±0.5 A. The resolution for DC and quasi-static current measurement was 0.1 mA at a 10 Hz bandwidth. The output in proportion to the measured current was obtained either by demodulating the current-sensitive AC signal or by employing the filtered output of the intrinsically nonlinear spin-valve response. The proposed current sensing scheme is suitable for quasi-static current measurement from DC to over 100 Hz. |
| first_indexed | 2024-04-11T11:59:21Z |
| format | Article |
| id | doaj.art-2f435e5ee5024aa9b9ecc81a4b05c16b |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T11:59:21Z |
| publishDate | 2019-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-2f435e5ee5024aa9b9ecc81a4b05c16b2022-12-22T04:24:57ZengMDPI AGSensors1424-82202019-04-01198188210.3390/s19081882s19081882Quasi-Static Current Measurement with Field-Modulated Spin-Valve GMR SensorsJen-Tzong Jeng0Xuan-Thang Trinh1Chih-Hsien Hung2Chih-Cheng Lu3Department of Mechanical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, TaiwanFaculty of Mechanical Engineering, Hung Yen University of Technology and Education, Hung Yen 160000, VietnamGraduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, TaiwanGraduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, TaiwanA non-contact current measurement device comprised of a GMR sensor and a ferrite ring core was investigated. The sensor chip employed a high-sensitivity spin-valve full-bridge GMR sensor of which the direct output has non-negligible hysteresis and a limited linear range. By applying an AC modulation current to modulate the output of the GMR sensor, the hysteresis was reduced, and the linear range was over ±0.5 A. The resolution for DC and quasi-static current measurement was 0.1 mA at a 10 Hz bandwidth. The output in proportion to the measured current was obtained either by demodulating the current-sensitive AC signal or by employing the filtered output of the intrinsically nonlinear spin-valve response. The proposed current sensing scheme is suitable for quasi-static current measurement from DC to over 100 Hz.https://www.mdpi.com/1424-8220/19/8/1882giant magnetoresistance (GMR)spin-valvecurrent measurementAC modulation |
| spellingShingle | Jen-Tzong Jeng Xuan-Thang Trinh Chih-Hsien Hung Chih-Cheng Lu Quasi-Static Current Measurement with Field-Modulated Spin-Valve GMR Sensors Sensors giant magnetoresistance (GMR) spin-valve current measurement AC modulation |
| title | Quasi-Static Current Measurement with Field-Modulated Spin-Valve GMR Sensors |
| title_full | Quasi-Static Current Measurement with Field-Modulated Spin-Valve GMR Sensors |
| title_fullStr | Quasi-Static Current Measurement with Field-Modulated Spin-Valve GMR Sensors |
| title_full_unstemmed | Quasi-Static Current Measurement with Field-Modulated Spin-Valve GMR Sensors |
| title_short | Quasi-Static Current Measurement with Field-Modulated Spin-Valve GMR Sensors |
| title_sort | quasi static current measurement with field modulated spin valve gmr sensors |
| topic | giant magnetoresistance (GMR) spin-valve current measurement AC modulation |
| url | https://www.mdpi.com/1424-8220/19/8/1882 |
| work_keys_str_mv | AT jentzongjeng quasistaticcurrentmeasurementwithfieldmodulatedspinvalvegmrsensors AT xuanthangtrinh quasistaticcurrentmeasurementwithfieldmodulatedspinvalvegmrsensors AT chihhsienhung quasistaticcurrentmeasurementwithfieldmodulatedspinvalvegmrsensors AT chihchenglu quasistaticcurrentmeasurementwithfieldmodulatedspinvalvegmrsensors |