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Statements

Subject Item
n2:RIV%2F68407700%3A21230%2F12%3A00194968%21RIV13-MSM-21230___
rdf:type
skos:Concept n12:Vysledek
dcterms:description
Magnetoresistors can replace induction sensors in applications like nondestructive testing and metal detection, where high spatial resolution or low frequency response is required. Using an AC excitation field the magnetic response of eddy currents is detected. Although giant magnetoresistive (GMR) sensors have higher measuring range and sensitivity compared to anisotropic magnetoresistors (AMR), they show also higher hysteresis and noise especially at low frequencies. Therefore AMR sensors are chosen to be evaluated in low noise measurements with combined processing of DC and AC excitation field with respect to the arrangement of processing electronics. Circuit with a commercial AMR sensor HMC1001 and AD8429 preamplifier has the noise of 125 pT/rtHz at 1 Hz using the flipping technique. Without the flipping, the noise combined with the 1/f noise of the amplifier results in 246 pT/rtHz at 1 Hz. Magnetoresistors can replace induction sensors in applications like nondestructive testing and metal detection, where high spatial resolution or low frequency response is required. Using an AC excitation field the magnetic response of eddy currents is detected. Although giant magnetoresistive (GMR) sensors have higher measuring range and sensitivity compared to anisotropic magnetoresistors (AMR), they show also higher hysteresis and noise especially at low frequencies. Therefore AMR sensors are chosen to be evaluated in low noise measurements with combined processing of DC and AC excitation field with respect to the arrangement of processing electronics. Circuit with a commercial AMR sensor HMC1001 and AD8429 preamplifier has the noise of 125 pT/rtHz at 1 Hz using the flipping technique. Without the flipping, the noise combined with the 1/f noise of the amplifier results in 246 pT/rtHz at 1 Hz.
dcterms:title
Low Frequency Noise of Anisotropic Magnetoresistors in AC-excited Magnetometers Low Frequency Noise of Anisotropic Magnetoresistors in AC-excited Magnetometers
skos:prefLabel
Low Frequency Noise of Anisotropic Magnetoresistors in AC-excited Magnetometers Low Frequency Noise of Anisotropic Magnetoresistors in AC-excited Magnetometers
skos:notation
RIV/68407700:21230/12:00194968!RIV13-MSM-21230___
n12:predkladatel
n13:orjk%3A21230
n4:aktivita
n17:S n17:P
n4:aktivity
P(GD102/09/H082), S
n4:dodaniDat
n6:2013
n4:domaciTvurceVysledku
n5:9294635 n5:7555180 n5:3157644
n4:druhVysledku
n11:O
n4:duvernostUdaju
n7:S
n4:entitaPredkladatele
n15:predkladatel
n4:idSjednocenehoVysledku
147492
n4:idVysledku
RIV/68407700:21230/12:00194968
n4:jazykVysledku
n8:eng
n4:klicovaSlova
Magnetoresistors; magnetometers
n4:klicoveSlovo
n14:magnetometers n14:Magnetoresistors
n4:kontrolniKodProRIV
[9066CF958EE8]
n4:obor
n10:JB
n4:pocetDomacichTvurcuVysledku
3
n4:pocetTvurcuVysledku
3
n4:projekt
n18:GD102%2F09%2FH082
n4:rokUplatneniVysledku
n6:2012
n4:tvurceVysledku
Janošek, Michal Vyhnánek, Jan Ripka, Pavel
n16:organizacniJednotka
21230