Specific Lock-in Amplifier for Fluxgate Sensor Testing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F25%3A00377809" target="_blank" >RIV/68407700:21230/25:00377809 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1109/TMAG.2024.3485696" target="_blank" >https://doi.org/10.1109/TMAG.2024.3485696</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TMAG.2024.3485696" target="_blank" >10.1109/TMAG.2024.3485696</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Specific Lock-in Amplifier for Fluxgate Sensor Testing

Popis výsledku v původním jazyce

Characterizing the noise and long-term offset stability of a fluxgate sensor are two of many important tasks during its development and manufacturing. For this purpose, it is advantageous to use synchronous demodulation realized by a lock-in amplifier. Commercial lock-in amplifiers are very complex, expensive, bulky, and frequently generate unpleasant acoustic noise. Additionally, these instruments are often heavily utilized in the lab. We, thus, present the development and testing of a specific instrument tailored for fluxgate sensor measurements. It combines a low-noise data acquisition front-end module with an excitation unit featuring variable parameters (frequency, H-bridge voltage) and a precise feedback current source module for possible closed-loop operation. With this configuration, it forms a single-axis digital magnetometer with up to 26-bit resolution. Furthermore, a Cyclone V FPGA development kit controls all the modules and performs the necessary signal processing. The presented lock-in amplifier uses only internal signal reference coupled with excitation unit signals – a solution that greatly simplifies the design. The user interface is based on LabVIEW software and provides real-time signal and spectrum charts. The results of the instrument’s characterization as well as the testing of a race-track fluxgate sensor are presented herein.

Název v anglickém jazyce

Specific Lock-in Amplifier for Fluxgate Sensor Testing

Popis výsledku anglicky

Characterizing the noise and long-term offset stability of a fluxgate sensor are two of many important tasks during its development and manufacturing. For this purpose, it is advantageous to use synchronous demodulation realized by a lock-in amplifier. Commercial lock-in amplifiers are very complex, expensive, bulky, and frequently generate unpleasant acoustic noise. Additionally, these instruments are often heavily utilized in the lab. We, thus, present the development and testing of a specific instrument tailored for fluxgate sensor measurements. It combines a low-noise data acquisition front-end module with an excitation unit featuring variable parameters (frequency, H-bridge voltage) and a precise feedback current source module for possible closed-loop operation. With this configuration, it forms a single-axis digital magnetometer with up to 26-bit resolution. Furthermore, a Cyclone V FPGA development kit controls all the modules and performs the necessary signal processing. The presented lock-in amplifier uses only internal signal reference coupled with excitation unit signals – a solution that greatly simplifies the design. The user interface is based on LabVIEW software and provides real-time signal and spectrum charts. The results of the instrument’s characterization as well as the testing of a race-track fluxgate sensor are presented herein.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

IEEE Transactions on Magnetics

ISSN

0018-9464

e-ISSN

1941-0069

Svazek periodika

61

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

—

Kód UT WoS článku

001499319000016

EID výsledku v databázi Scopus

2-s2.0-85207892155