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Ring-Core Fluxgate Sensor for High Operation Temperatures up to 220 °C

Fluxgate sensors are key devices for magnetic field surveys in geophysics. In areas such as deep drilling, fluxgate sensors may have to operate steadily at high temperatures for a prolonged period of time. We present an accordant ring-core type fluxgate sensor that is stable up to [Formula: see text...

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Detalles Bibliográficos
Autores principales: Yuan, Kaixin, Du, Aimin, Zhao, Lin, Sun, Shuquan, Feng, Xiao, Zhang, Chenhao, Zhang, Yiming, Qin, Huafeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9785734/
https://www.ncbi.nlm.nih.gov/pubmed/36557457
http://dx.doi.org/10.3390/mi13122158
Descripción
Sumario:Fluxgate sensors are key devices for magnetic field surveys in geophysics. In areas such as deep drilling, fluxgate sensors may have to operate steadily at high temperatures for a prolonged period of time. We present an accordant ring-core type fluxgate sensor that is stable up to [Formula: see text] °C. The high temperature consistency is achieved by using an Fe-based nanocrystalline magnetic core, PEEK structural components, an epoxy resin wrapping, as well as a broadband short-circuited working mode. The sensor was characterized at various temperatures up to [Formula: see text] °C by evaluating impedance, hysteresis, permeability and sensitivity. We found a sensitivity of approximately 24 kV/T at [Formula: see text] °C with an acceptable temperature coefficient of 742 ppm/°C throughout the range. The variation law of magnetic characteristics and their influence mechanism on output amplitude and phase are discussed.