Method and Apparatus for Detecting Rotational Movement of a Piston Rod
    5.
    发明申请
    Method and Apparatus for Detecting Rotational Movement of a Piston Rod 审中-公开
    检测活塞杆旋转运动的方法和装置

    公开(公告)号:US20100213928A1

    公开(公告)日:2010-08-26

    申请号:US12774503

    申请日:2010-05-05

    IPC分类号: G01B7/14

    摘要: A piston rod position sensing system includes a cylinder and a piston rod arranged in the cylinder for movement with respect thereto. A magnetically hard layer is formed on the piston rod to provide a recording medium. A magnetic pattern is recorded in the magnetically hard layer. The magnetic pattern includes tracks recorded in the magnetically hard layer lengthwise of the piston rod. Each track comprises magnetically written regions used to identify a current position of the piston rod. The sensing system also includes a plurality of magnetic field sensors in greater number than the plurality of tracks. Each magnetic field sensor senses the magnetically written regions of one or more of the tracks while the piston rod is moving with respect to the cylinder and generates signals used for detecting rotation of the piston rod in response to the sensed magnetically written regions.

    摘要翻译: 活塞杆位置检测系统包括设置在气缸中的气缸和活塞杆,用于相对于其移动。 在活塞杆上形成磁性硬层以提供记录介质。 磁性图案被记录在磁性硬层中。 磁性图案包括记录在活塞杆纵向的磁性硬层中的轨迹。 每个轨道包括用于识别活塞杆当前位置的磁写区域。 感测系统还包括比多个轨道更多数量的多个磁场传感器。 当活塞杆相对于气缸移动时,每个磁场传感器感测一个或多个轨道的磁性写入区域,并产生用于响应于感测到的磁写区域来检测活塞杆的旋转的信号。