An alternating current calibration method for Helmholtz coil constant based on orthogonal calculation principle

• Autorzy: Zhang Kuankuan , Cao Mingxing , He Jian , Gong Wenjie , Huang Yunhua

Identyfikatory

DOI

10.24425/mms.2023.146415

• Języki publikacji: EN

Abstrakty

EN

The Helmholtz coil constant (𝑘_ℎ) is a crucial standard in magnetic moment measurement devices for permanent magnet materials. To overcome the problem of low accuracy of the direct-current (DC) calibration method, this study used a constant sinusoidal current in the Helmholtz coil and measured the induced voltage of the detection coil with known coil turns and coil area. Subsequently, the 𝑘_ℎ was calculated. The noise signal deduction rate in the induction voltage of the detection coil was greater than 99%, its influence on the induction voltage is less than 0.005%, and the repeatability of the calibration results is 0.003% (1𝛿). The results reveal that the alternating current (AC) method and orthogonal calculation (OC) can accurately measure the valid values of the voltage signal under the influence of the spatial stray field during the calibration of 𝑘_ℎ.

Słowa kluczowe

EN

Helmholtz coils constant; alternating current method; induction voltage; orthogonal calculations

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2023
• Tom: Vol. 30, nr 3
• Strony: 549--561
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr., wzory

Twórcy

autor

Zhang Kuankuan

• Magnetic Materials Measurement Laboratory, National Institute of Metrology, Beijing 100029, China
• University of Science and Technology Beijing, Beijing 100083, China

autor

Cao Mingxing

• Magnetic Materials Measurement Laboratory, National Institute of Metrology, Beijing 100029, China

autor

He Jian

• Magnetic Materials Measurement Laboratory, National Institute of Metrology, Beijing 100029, China

autor

Gong Wenjie

• Magnetic Materials Measurement Laboratory, National Institute of Metrology, Beijing 100029, China

autor

Huang Yunhua

• University of Science and Technology Beijing, Beijing 100083, China

Bibliografia

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Uwagi

1. This work was supported by the State Administration for Market Regulation of China (No. ANL1912).

2. Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).