A system for controllable magnetic measurements of hysteresis and Barkhausen noise
Result description
A specially developed setup for precise measurement of magnetic hysteresis and Barkhausen noise is presented. The setup combines two main features: 1) an accurate local determination of the magnetic field and 2) an improved feedback control of the magnetization process. The magnetic field is measured by two Hall sensors at different distances above the sample. The sample field is determined by a linear extrapolation of these measured profiles of the tangential fields to the sample surface. A digital feedback loop for precise control of the ac magnetization process is proposed. The feedback algorithm combines two methods of magnetizing signal adjustment: linear corrections of the magnetizing voltage amplitude and phase. The presented system is able to adjust the waveform of the magnetic induction or field to the prescribed sinusoidal or triangular shape. This provides stable and physically accurate results, which are independent of a specific experimental configuration.
Keywords
Barkhausen effectfeedback circuitsmagnetic field measurementmagnetic hysteresismagnetization processessilicon steel
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
A system for controllable magnetic measurements of hysteresis and Barkhausen noise
Original language description
A specially developed setup for precise measurement of magnetic hysteresis and Barkhausen noise is presented. The setup combines two main features: 1) an accurate local determination of the magnetic field and 2) an improved feedback control of the magnetization process. The magnetic field is measured by two Hall sensors at different distances above the sample. The sample field is determined by a linear extrapolation of these measured profiles of the tangential fields to the sample surface. A digital feedback loop for precise control of the ac magnetization process is proposed. The feedback algorithm combines two methods of magnetizing signal adjustment: linear corrections of the magnetizing voltage amplitude and phase. The presented system is able to adjust the waveform of the magnetic induction or field to the prescribed sinusoidal or triangular shape. This provides stable and physically accurate results, which are independent of a specific experimental configuration.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JB - Sensors, detecting elements, measurement and regulation
OECD FORD branch
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Result continuities
Project
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IEEE Transactions on Instrumentation and Measurement
ISSN
0018-9456
e-ISSN
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Volume of the periodical
65
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
1087-1097
UT code for WoS article
000374892500016
EID of the result in the Scopus database
2-s2.0-84947997252
Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
JB - Sensors, detecting elements, measurement and regulation
Year of implementation
2016