公开(公告)号：US20120248300A2

公开(公告)日：2012-10-04

申请号：US12663514

申请日：2007-10-17

申请人： Hayami KIKAWA ,  Satoshi YANOBE

发明人： Hayami KIKAWA ,  Satoshi YANOBE

IPC分类号： G01D5/34

CPC分类号： G01D5/2449 ,  G01D5/24452 ,  G01D5/3473 ,  G01D5/36

摘要： [Object] To provide an angular correction method with which angular skip does not occur in determining an angle between angular graduations of a dial of a rotary encoder by interpolation calculation. [Solution Means] Angular correction data are obtained by a residual curve determining step (S2) of determining a residual ri between a position computed from a model and an actually read position Pi, and of fitting the residual ri to a polynomial f(x) which is a function of an angular graduation image number x to determine a residual curve, r=f(x), a slope computing step (S4) of computing a tangential slope f′(xi) of the residual curve; an angular skip computing step (S5) of computing an angular graduation image position correction quantity Ci from a residual ri and the slope f′(xi), of determining a measured angle value θ0 by using the correction quantity Ci, of switching the combination of angular graduation images to a forward side and a backward side to determine measured angle values θ−1 and θ+1, and of computing the angular skip quantity; an order determining step (S7) of determining the order of the polynomial f(x) such that the angular skip quantity is minimized; and an angular correction data recording step (S8) of recording the residual and the tangential slope.

摘要翻译： 提供一种角度校正方法，通过插值计算来确定旋转编码器的刻度盘的角度刻度之间不会发生角度跳跃。 [解决方案]角度校正数据通过残差曲线确定步骤（S2）获得，该步骤确定从模型计算出的位置与实际读取位置Pi之间的残差ri，并将剩余ri拟合为多项式f（x） 其是角度分度图像数x的函数，以确定残差曲线，r = f（x），计算残差曲线的切向斜率f'（xi）的斜率计算步骤（S4） 通过使用校正量Ci来确定测量的角度值＆amp; t; 0，通过使用校正量Ci来计算来自剩余ri的角度刻度图像位置校正量Ci和斜率f'（xi）的角度跳跃计算步骤（S5） 将角度刻度图像组合到前侧和后侧，以确定测量的角度值和角度; -1和＆amp; Thetas; +1，并计算角度跳跃量; 确定多项式f（x）的顺序的顺序确定步骤（S7），使得角度跳跃量最小化; 以及记录剩余和切向斜率的角度校正数据记录步骤（S8）。