TY - JOUR
N2 - The Helmholtz coil constant (k h) is a crucial standard in magnetic moment measurement devices for permanent magnet materials. To overcome the problem of lowaccuracy 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.
L1 - http://www.czasopisma.pan.pl/Content/129014/PDF-MASTER/art11_int_cor.pdf
L2 - http://www.czasopisma.pan.pl/Content/129014
PY - 2023
IS - No 3
EP - 561
DO - 10.24425/mms.2023.146415
KW - Helmholtz coils constant
KW - alternating current method
KW - induction voltage
KW - orthogonal calculations
A1 - Zhang, Kuankuan
A1 - Cao, Mingxing
A1 - He, Jian
A1 - Gong, Wenjie
A1 - Huang, Yunhua
PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation
VL - vol. 30
DA - 2023.10.27
T1 - An alternating current calibration method for Helmholtz coil constant based on orthogonal calculation principle
SP - 549
UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/129014
T2 - Metrology and Measurement Systems
ER -