期刊
MEASUREMENT
卷 94, 期 -, 页码 456-463出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2016.08.022
关键词
Magnetic Barkhausen noise; Post-processing method; Vibrations; Thermal noise; Frequency spectrum
资金
- Ministry of Education, Youth and Sports of the Czech Republic from the National Programme of Sustainability (NPU II) project IT4Innovations excellence in science [LQ1602]
- SGS project [SP2016/167]
- Czech Science Foundation [15-08971S]
This paper deals with extraction of pure Barkhausen noise from the raw signals received in high-frequency regimes. The raw Barkhausen noise signals measured in high-frequency regimes contain components which cannot be attributed to the interaction of Bloch Walls with pinning sites and stress states such as the thermal noise of the sensor and the mechanical vibrations of the sensor-exciting core. Due to the variable ratios of thermal noise to Barkhausen noise as well as distortion of the signal due to vibrations, the raw signal as received and the pure Barkhausen noise signal can differ remarkably, thus making signal interpretation a debatable issue. For this reason, the post-processing method of the measured signal is presented here. In addition, the properties of Scan 500 device are analysed in detail. (C) 2016 Elsevier Ltd. All rights reserved.
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