About: Development of a new system for measurement of open-circuit ferromagnetic samples with controlled magnetization waveform     Goto   Sponge   NotDistinct   Permalink

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Description
  • Cílem projektu je maximálně rozšířit aplikace jedno-jhové soustavy na měření magnetické hystereze a Barkhausenova šumu v laboratorních a průmyslových podmínkách. Bude vyvinut nový senzor na měření Barkhausenova šumu s digitální kontrolou lokální magnetizaci za pomoci sady Hallových senzorů. (cs)
  • The project proposes innovative development of a single-yoke system for magnetic hysteresis and Barkhausen noise measurements. To stabilize the magnetization conditions and to make the measurement results independent on the yoke lift-off, an iterative digital feedback procedure will be developed to control the magnetic field/flux waveform. The sample magnetization will be controlled by an array of Hall sensors measuring tangential surface field profile above the sample. Extrapolation of this profile to the sample face determines the actual sample field. To make the measurements independent on the sample dimensions, a special sensor for local Barkhausen noise measurement will be constructed and tested. It will contain the Hall sensor/s for magnetization control with the digital feedback coupled with an attached coil for the measurement of Barkhausen noise response. Detailed investigation of applicability of the proposed technique to classical cases of industrial interest will be done. In case of positive results, a patent application for the Barkhausen noise sensor will be submitted. (en)
Title
  • Vývoj nové soustavy na měření otevřených feromagnetických vzorků s kontrolováním magnetizačního signálu (cs)
  • Development of a new system for measurement of open-circuit ferromagnetic samples with controlled magnetization waveform (en)
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  • magnetické měření; digitální zpětná vazba; kontrolovaní magnetizačního signálu; jedno-jhový magnet; šum (en)
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