基于正交计算原理的亥姆霍兹线圈常数交流标定方法

IF 1 4区工程技术 Q4 INSTRUMENTS & INSTRUMENTATION

Metrology and Measurement Systems Pub Date : 2023-10-27 DOI:10.24425/mms.2023.146415

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

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% (1 𝛿 ). 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 .

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来源期刊

Metrology and Measurement Systems INSTRUMENTS & INSTRUMENTATION-

CiteScore

2.00

自引率

10.00%

发文量

审稿时长

6 months

期刊介绍： Contributions are invited on all aspects of the research, development and applications of the measurement science and technology. The list of topics covered includes: theory and general principles of measurement; measurement of physical, chemical and biological quantities; medical measurements; sensors and transducers; measurement data acquisition; measurement signal transmission; processing and data analysis; measurement systems and embedded systems; design, manufacture and evaluation of instruments. The average publication cycle is 6 months.