Invention Grant
US08030916B2 Magnetic rotary encoder and method for iteratively aligning magnet relative to magnetic sensors 有权
磁性旋转编码器和相对于磁性传感器迭代对准磁铁的方法

  • Patent Title: Magnetic rotary encoder and method for iteratively aligning magnet relative to magnetic sensors
  • Patent Title (中): 磁性旋转编码器和相对于磁性传感器迭代对准磁铁的方法
  • Application No.: US11991983
    Application Date: 2006-08-16
  • Publication No.: US08030916B2
    Publication Date: 2011-10-04
  • Inventor: Frank PerskeColin SteeleMarcel Urban
  • Applicant: Frank PerskeColin SteeleMarcel Urban
  • Applicant Address: AT Unterpremsrätten
  • Assignee: austriamicrosystems AG
  • Current Assignee: austriamicrosystems AG
  • Current Assignee Address: AT Unterpremsrätten
  • Agency: Cozen O'Connor
  • Priority: EP05019803 20050912
  • International Application: PCT/EP2006/008090 WO 20060816
  • International Announcement: WO2007/031167 WO 20070322
  • Main IPC: G01R33/07
  • IPC: G01R33/07
Magnetic rotary encoder and method for iteratively aligning magnet relative to magnetic sensors
Abstract:
A sensor system and method of operating such a sensor system for measuring an angle of rotation with an arrangement of at least four magnetic sensors (10, 11, 12, 13), at least four signal modulators (30, 31, 32, 33), each one connected to one of the magnetic sensors (10, 11, 12, 13) and having at least two control states, whereby, in a first state (+), a signal received from a sensor (10, 11, 12, 13) is output by the signal modulators (30, 31, 32, 33) and, in a second state (−), the inverse of the signal received from the sensor (10, 11, 12, 13) is output by the signal modulators (30, 31, 32, 33), a means (90) for adding the signals output by the signal modulators (30, 31, 32, 33) and a diametrically magnetized magnetic source (9). The sensor system further comprises a data output (82) and a control circuit (80) with at least one control input (81), allowing to switch the control circuit (80) into at least two different modes. In a normal mode of operation, the signal modulators (30, 31, 32, 33) are configured in such a way that a signal corresponding to the angular position of the diametrically magnetized magnetic source (9) is output to the data output. In an alignment mode of operation, the signal modulators (30, 31, 32, 33) are configured in such a way that a signal corresponding to the average magnetic field strength detected by the sensors (10, 11, 12, 13) is output to the data output (82).
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