摘要
动态环路法磁矩测量技术是一种新的磁矩测量技术,为了解其实际性能指标,提出一种可以获得动态环路法测量误差和分辨率的测试方案。利用标准磁体模拟被测物,通过改变标准磁体的位置模拟被测物在任意方向的偏心情况,给出9组被测标准磁体设计方案。通过对比不同标准磁体的磁矩测量结果,得到原理样机在一定误差条件下的磁矩分辨率,并给出提高分辨率的方法。试验结果表明:动态环路法原理样机偶极磁矩测量误差<5%,磁心坐标测量误差<20%;在偶极磁矩测量误差<5%时,原理样机的磁矩分辨率可达0.06 A·m2。动态环路法具有良好的性能指标,可以用于高精度磁矩测量。
Dynamic loop method is one of the newest magnetic moment measuring techniques and its performance has not been precisely evaluated yet. A testing scheme is designed to assess the measuring errors and resolutions of this method. That is, standard magnets are assembled into nine simulators of different frameworks to simulate the off-centered dipoles of the measured objects in any direction. The magnetic moments of these simulators are measured by the dynamic loop method and then compared with the results calculated by electromagnetism theory. The results show that the measuring error in the magnetic moment of prototype dipoles is lower than5% and that of magnetic center coordinates is no more than 20%. When the measuring error of dipole magnetic moment is within 5%,the resolution is as high as 0.06 A·m^2. This suggests the dynamic loop method has sound performance indexes and can be applied in high-precision magnetic moment measurement.
出处
《中国测试》
CAS
北大核心
2016年第3期17-20,共4页
China Measurement & Test
基金
国家自然科学基金项目(51207011)
关键词
磁矩
动态环路法
误差
分辨率
magnetic moment
dynamic loop method
error
resolution
