用霍尔差值法作磁场分布的快速测量

• 作 者: 孙亲仁rrrrrrrrrrn 林树棪rrrrrrrrrrn 李增谱
• 出 处: 原子能科学技术
• 发表日期: 1978年04期
• 关键词: 测量支架 霍尔 探头 磁场分布 记录仪 参考点 霍尔电压 电位计 差值法 内扫描

用两只同型号的霍尔探头,将其霍尔电压端作差值连接。一只探头固定在场中的某一参考点上;另一只在测量支架上作扫描运动。差值输出用X-Y记录仪作记录,直接绘制出场分布的图形。可以在几分钟内扫描3米左右的行程。用这样的方法测量变化范围从-25%到15%的小梯度磁场的分布,测量的相对误差为±0.21%。

With two same type of Hall probe, the voltage difference between the Hall of the connection. One probe is fixed at a reference point in the field; the other is scanned only on the measurement stand. The difference output is recorded with the X-Y recorder and the graph of the appearance distribution is drawn directly. Can scan about 3 meters in a few minutes trip. In this way, the distribution of small gradient magnetic field with a range from -25% to 15% was measured, with a relative error of ± 0.21%.