Reducing the Noise Level in a Gaussmeter with a Hall Probe for Reliable Magnetic Impedance Tomography

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F19%3APU134579" target="_blank" >RIV/00216305:26220/19:PU134579 - isvavai.cz</a>

Výsledek na webu

<a href="https://ieeexplore.ieee.org/document/9017573" target="_blank" >https://ieeexplore.ieee.org/document/9017573</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/PIERS-Spring46901.2019.9017573" target="_blank" >10.1109/PIERS-Spring46901.2019.9017573</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Reducing the Noise Level in a Gaussmeter with a Hall Probe for Reliable Magnetic Impedance Tomography

Popis výsledku v původním jazyce

The paper presents the results obtained from a Gaussmeter noise optimization procedure The device facilitates to perform 3D magnetic field mapping and is applicable in magnetic impedance tomography. The relevant measurement was performed in a specialized magnetic field mapping laboratory. To define the impact of electromagnetic disturbance suppression, we performed repeated measuring cycles in both an environment with strong electromagnetic disturbance and an environment lacking such an effect, namely, a Faraday chamber. In order to suppress the given problem, we exploit synchronous detection in a lock-in amplifier; the amplifier facilitates the suppression of spurious signals, enabling us to select the desired ones. In the designed 3D magnetic field meter, Hall probes are used to measure magnetic induction. The Hall probe is applicable for the discussed purpose mainly thanks to its small active area and high dynamic range of the measured magnetic field. Pink noise is suppressible via alternating current excitation. For the selected Hall probe (Advanced Sensor Technology), spectral density measurement of the input noise voltage was performed. This input noise voltage was converted to the input magnetic induction noise. The measurement involved several excitation currents and is instrumental for determining the relevant optimization rate. The used input amplifier is a modulation device enabling pink noise suppression. The applied optimization approach satisfies the requirement for the maximum frequency bandwidth. The achieved parameters markedly surpass the frequency bandwidth of conventional commercial meters. The designed apparatus was calibrated with Helmholtz coils.

Název v anglickém jazyce

Reducing the Noise Level in a Gaussmeter with a Hall Probe for Reliable Magnetic Impedance Tomography

Popis výsledku anglicky

The paper presents the results obtained from a Gaussmeter noise optimization procedure The device facilitates to perform 3D magnetic field mapping and is applicable in magnetic impedance tomography. The relevant measurement was performed in a specialized magnetic field mapping laboratory. To define the impact of electromagnetic disturbance suppression, we performed repeated measuring cycles in both an environment with strong electromagnetic disturbance and an environment lacking such an effect, namely, a Faraday chamber. In order to suppress the given problem, we exploit synchronous detection in a lock-in amplifier; the amplifier facilitates the suppression of spurious signals, enabling us to select the desired ones. In the designed 3D magnetic field meter, Hall probes are used to measure magnetic induction. The Hall probe is applicable for the discussed purpose mainly thanks to its small active area and high dynamic range of the measured magnetic field. Pink noise is suppressible via alternating current excitation. For the selected Hall probe (Advanced Sensor Technology), spectral density measurement of the input noise voltage was performed. This input noise voltage was converted to the input magnetic induction noise. The measurement involved several excitation currents and is instrumental for determining the relevant optimization rate. The used input amplifier is a modulation device enabling pink noise suppression. The applied optimization approach satisfies the requirement for the maximum frequency bandwidth. The achieved parameters markedly surpass the frequency bandwidth of conventional commercial meters. The designed apparatus was calibrated with Helmholtz coils.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/GA17-00607S" target="_blank" >GA17-00607S: Komplexní umělé elektromagnetické struktury a nanostruktury</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

2019 Progress in Electromagnetics Research Symposium (PIERS-Rome)

ISBN

978-4-88552-316-8

ISSN

1559-9450

e-ISSN

—

Počet stran výsledku

6

Strana od-do

2106-2111

Název nakladatele

IEEE

Místo vydání

Rome, Italy

Místo konání akce

Řím

Datum konání akce

17. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000550769302020