AN ALTERNATING CURRENT CALIBRATION METHOD FOR HELMHOLTZ COIL CONSTANT BASED ON ORTHOGONAL CALCULATION PRINCIPLE

被引：3

作者：

Zhang, Kuankuan ^{[1
,2
]}

Cao, Mingxing ^{[1
]}

He, Jian ^{[1
]}

Gong, Wenjie ^{[1
]}

Huang, Yunhua ^{[2
]}

机构：

[1] Natl Inst Metrol, Magnet Mat Measurement Lab, Beijing 100029, Peoples R China

[2] Univ Sci & Technol Beijing, Beijing 100083, Peoples R China

来源：

METROLOGY AND MEASUREMENT SYSTEMS | 2023年 / 30卷 / 03期

关键词：

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

D O I：

10.24425/mms.2023.146415

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The Helmholtz coil constant (kh) is a crucial standard in magnetic moment measurement devices for permanent magnet materials. To overcome the problem of low accuracy of the direct-cur rent (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 kh 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% (16). 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 kh.

引用

页码：549 / 561

页数：13

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