利索-全球专利检索

  1. 登录
  2. 注册
发明授权
CN107003364B 磁阻式惠斯通电桥和具有至少两个这种电桥的角度传感器 有权

磁阻式惠斯通电桥和具有至少两个这种电桥的角度传感器
摘要：
本发明涉及一种磁阻式惠斯通电桥(10，12，14，16，18，20，22，24)，该磁阻式惠斯通电桥包括并联连接在电源电势Vb之间的两个电桥支路，其中，两个串联连接的电阻器装置R1和R3、或R2和R4被布置在各个电桥支路中并且具有居间的测量电势Vout。这两个电桥支路的电阻器装置R1和R3、或R2和R4采用彼此对角相对的布置，至少两个磁阻式电阻器装置R1和R3或R2和R4具有磁敏优选方向。这些电桥支路的彼此对角相对布置的电阻器装置R1和R3，或R2和R4的优选方向彼此相差一角度，所述角度不为0°或180°。另一个方面，提出了一种角度传感器(30)，所述角度传感器(30)包括偏移预定角度尤其是90°的至少两个该磁阻式惠斯通电桥(10，12，14，16，18，20，22，24)，用于通过第一和第二传感器电桥(40，42)尤其是正弦电桥和余弦电桥确定磁场的角定向。通过根据本发明的测量电桥，使得能减少谐波并且实现最优电阻值，由此提高角度发射器信号的准确度和传感器分辨率。
摘要（英）：

A magnetoresistive Wheatstone bridge includes two bridge branches connected in parallel between a supply potential Vb, wherein two series-connected resistor arrangements R1 and R3 or R2 and R4 are arranged in each bridge branch with an interposed measuring potential Vout. The resistor arrangements of the two bridge branches are situated diagonally opposite one another and at least two magnetoresistive resistor arrangements have a magnetically sensitive preferred direction. The preferred directions of diagonally opposing resistor arrangements of the bridge branches R1 and R4 or R2 and R3 differ by an angle other than 0° or 180°. An angle sensor includes at least two of the Wheatstone bridges offset by a predefined angle for determining an angular orientation of a magnetic field by a sine bridge and a cosine bridge. The measuring bridge reduces harmonics and optimizes resistance values, improving the accuracy of a phase-angle sensor signal and the sensor resolution.

公开/授权文献
0/0