Magnetic gradiometer with self compensation of offset drift

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F17%3A00307134" target="_blank" >RIV/68407700:21230/17:00307134 - isvavai.cz</a>
Result on the web
<a href="http://ieeexplore.ieee.org/document/7808502/" target="_blank" >http://ieeexplore.ieee.org/document/7808502/</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/ICSENS.2016.7808502" target="_blank" >10.1109/ICSENS.2016.7808502</a>

Result language
angličtina
Original language name
Magnetic gradiometer with self compensation of offset drift
Original language description
In this paper we present a magnetic gradiometer based on a single core orthogonal fluxgate in fundamental mode. Contrarily to similar gradiometers based on detached sensor heads the use of a single core strongly reduces the offset instability of the output. The offset drift is caused by temperature variations and in a single ferromagnetic core the temperature is more uniform than in two detached cores. As a result the offset of both coils drift in a very similar way and when computing their difference to obtain the gradiometric signal the output is very stable. Moreover, we show that using a single core we have noise suppression due to correlation of the magnetic noise and this mechanism also leads to noise reduction of the gradiometric output. As a result we achieved 10 pT/m/VHz noise at 1 Hz.
Czech name
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Czech description
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Project
<a href="/en/project/GJ16-10591Y" target="_blank" >GJ16-10591Y: Magnetic gradiometer based on fundamental mode orthogonal fluxgate</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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