Off-axis magnetic angle sensor using magnetic sensing probe and multipole magnet array

• Main Authors: KENNY CHRISTOPHER, SCHWEIZER PASCAL, ANDREWS RICHARD
• Format: Patent
• Language: Chinese; English
• Published: 03.01.2023
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

Apparatus and associated methods involve measuring the position and displacement of a 2D surface magnet array of at least three adjacent magnetic north-south tracks, the magnet array being at an acute angle to its movement displacement relative to a magnetic field sensor (e.g., a magnetic sensing probe). In exemplary examples, the geometry of the 2D surface magnet array may be planar with adjacent and alternating north and south pole regions. In some embodiments, the 2D surface magnet array geometry may take the form of (1) an axial cylindrical spiral multipole magnet array with individual magnetized layers oriented in a spiral shape, or (2) a radial disc-like spiraling multipole magnet array with at least three adjacent north-south orbits oriented in a spiraling shape. 装置和相关联方法涉及测量至少三个相邻磁性南北轨道的2D表面磁体阵列的位置和位移，该磁体阵列与其相对于磁场传感器(例如，磁感测探针)的运动位移成锐角。在示例性示例中，该2D表面磁体阵列的几何形状可以是平面的，具有相邻且交替的北极区域和南极区域。在一些实施方案中，该2D表面磁体阵列几何形状可以采取以下形式：(1)具有以螺旋形状定向的单独磁化层的轴向圆柱形螺旋多极磁体阵列，或者(2)具有定向为盘旋形状的至少三个相邻南北轨道的径向盘状盘旋多极磁体阵列。