公开(公告)号：US06433536B1

公开(公告)日：2002-08-13

申请号：US09223943

申请日：1998-12-31

申请人： George B. Yundt ,  Bradley A. Trago ,  Robert E. Lordo ,  Harry B. Behm

发明人： George B. Yundt ,  Bradley A. Trago ,  Robert E. Lordo ,  Harry B. Behm

IPC分类号： G01B730

CPC分类号： G01D5/145

摘要： The present invention is an apparatus for indicating the instantaneous position of a movable member along a range of motion with respect to a reference position. The apparatus includes a magnetic body that is fixedly attached to the movable member. The body has a contoured surface to control the shape of a magnetic field relative to position, and further includes at least two magnetic field sensors. Each of the sensors is disposed adjacent to the contoured surface of the magnetic body and fixed with respect to the reference position, and is positioned apart from the other sensors, so as to form a non-uniform gap between the contoured surface and each of the magnetic field sensors. Each of the sensors produces a position dependent signal corresponding to a value of the magnetic field. The apparatus further includes a decoding circuit electrically coupled to each of the magnetic field sensors so as to receive each of the position dependent signals. The decoding circuit produces a position dependent signal that is a predetermined function of the position dependent signals. Multiple sensors can be utilized to provide redundancy. Further, the apparatus can provide measurement correction of measurement errors caused by incorrect location of the magnetic field sensors.

摘要翻译： 本发明是一种用于指示可移动部件相对于基准位置的运动范围的瞬时位置的装置。 该装置包括固定在可移动部件上的磁体。 主体具有轮廓表面以相对于位置控制磁场的形状，并且还包括至少两个磁场传感器。 每个传感器设置成与磁体的轮廓表面相邻并且相对于参考位置固定，并且与其它传感器分开定位，以便在轮廓表面和每个传感器之间形成不均匀的间隙 磁场传感器。 每个传感器产生对应于磁场值的与位置相关的信号。 该装置还包括电耦合到每个磁场传感器以便接收每个位置相关信号的解码电路。 解码电路产生位置相关信号，该位置相关信号是位置相关信号的预定函数。 可以利用多个传感器来提供冗余。 此外，该装置可以提供由磁场传感器的不正确位置引起的测量误差的测量校正。