A Feedback Method to Improve the Dynamic Range and the Linearity of Magnetoimpedance Magnetic Sensor
Author
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-12-12
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
We developed a high-sensitivity magnetoimpedance magnetic field sensor using a FeCoSiB amorphous wire and a coil wound around it.
The amorphous wire had the diameter of 0.1 mm and the length of 5 mm.
The magnetic field resolution of about 20 pT/√Hz was achieved.
But the dynamic range of the magnetoimpedance magnetic field sensor was only about ±0.7 Gauss, which was not enough for some applications, such as the defect evaluation of steel plate.
The linearity of the system was also not good when big magnetic field was applied, which will cause some noise when the system is used in unshielded environment.
We developed a feedback method to improve the dynamic range and the linearity of the magnetic field sensor.
The operation point of the magnetic field sensor was fixed by sending a feedback current to the coil.
Using the feedback method, the dynamic range was improved from ±0.7 Gauss to ±10 Gauss and the linearity was also improved over 100 times better.
An eddy current testing system using the magnetic sensor was developed, and the crack defects in steel plate and in 3D-printed titanium alloy plate were evaluated.
American Psychological Association (APA)
He, Dongfeng. 2019. A Feedback Method to Improve the Dynamic Range and the Linearity of Magnetoimpedance Magnetic Sensor. Journal of Sensors،Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1187273
Modern Language Association (MLA)
He, Dongfeng. A Feedback Method to Improve the Dynamic Range and the Linearity of Magnetoimpedance Magnetic Sensor. Journal of Sensors No. 2019 (2019), pp.1-8.
https://search.emarefa.net/detail/BIM-1187273
American Medical Association (AMA)
He, Dongfeng. A Feedback Method to Improve the Dynamic Range and the Linearity of Magnetoimpedance Magnetic Sensor. Journal of Sensors. 2019. Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1187273
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1187273