Specific Lock-in Amplifier for Fluxgate Sensor Testing

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Specific Lock-in Amplifier for Fluxgate Sensor Testing

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20201 - Electrical and electronic engineering

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2025

Confidentiality

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

Name of the periodical

IEEE Transactions on Magnetics

ISSN

0018-9464

e-ISSN

1941-0069

Volume of the periodical

61

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

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UT code for WoS article

001499319000016

EID of the result in the Scopus database

2-s2.0-85207892155