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    • 9. 发明申请
    • IMAGE PROCESSING APPARATUS
    • 图像处理设备
    • WO2002063566A2
    • 2002-08-15
    • PCT/GB2002/000446
    • 2002-02-01
    • TAYLOR HOBSON LIMITEDBANKHEAD, Andrew, DouglasSCOTT, Paul, James
    • BANKHEAD, Andrew, DouglasSCOTT, Paul, James
    • G06T7/60
    • G06T7/60
    • A measurement probe (2) obtains image data representing a part of a surface such as a cylinder bore surface and supplies it to a control apparatus (20) which is arranged to determine information about a predominant feature in the image. The control apparatus (20) has a frequency transformer (21) for obtaining a frequency transform of the image data, a processor (21) for processing the frequency transform to provide amplitude data representing amplitude values at different angles values, an identifier (21) for identifying the main peak or main peaks in the amplitude data, a position determiner (21) for determining position data for the or each main peak in the amplitude data; and a display (24) for supplying information derived from position data about the predominant feature to an operator.
    • 测量探针(2)获得表示诸如气缸孔表面的表面的一部分的图像数据,并将其提供给控制装置(20),控制装置(20)被布置成确定关于图像中的主要特征的信息。 控制装置(20)具有用于获得图像数据的频率变换的变频器(21),用于处理频率变换以提供表示不同角度值的振幅值的幅度数据的处理器(21),识别符(21) 用于识别振幅数据中的主峰值或主峰值的位置确定器(21),用于确定振幅数据中的每个主峰值的位置数据; 以及用于向操作者提供关于主要特征的位置数据的信息的显示器(24)。
    • 10. 发明申请
    • ROUNDNESS MEASURING
    • 圆度测量
    • WO1996012162A1
    • 1996-04-25
    • PCT/GB1995002460
    • 1995-10-18
    • RANK TAYLOR HOBSON LIMITEDSCOTT, Paul, James
    • RANK TAYLOR HOBSON LIMITED
    • G01B21/20
    • G01B21/20
    • A roundness measuring machine measures the position of the surface of an object (23) as the object is rotated on a turntable (7). The machine determines the circle (51) which is the best fit to the measured points (P) and converts the measurements (x) to distances (m) from the best fit circle. An improved algorithm for determining the best fit circle is used in place of the limacon fit. Calculated differences (1) between the measured surface position and the best fit circle are corrected for the effect of measuring the difference in the direction towards the centre (S) of rotation of the turntable (7) instead of in the direction towards the centre (W) of the circle (51). Data values are calculated representing points at equal angles ( theta ) around the centre (W) of the best fit circle rather than equal angles ( alpha ) around the centre (S) of rotation of the turntable. The improved accuracy of correction allows the machine to tolerate greater eccentricity of the workpiece (23) relative to the turntable (7), reducing the necessity for accurate centering of the workpiece.
    • 当物体在转台(7)上旋转时,圆度测量机测量物体(23)的表面的位置。 机器确定与测量点(P)最佳拟合的圆(51),并将测量值(x)从最佳拟合圆转换为距离(m)。 使用用于确定最佳拟合圆的改进的算法来代替limacon拟合。 校正测量的表面位置和最佳拟合圆之间的计算差异(1),用于测量朝向转台(7)的旋转中心(S)的方向上的差异的效果,而不是沿朝向中心的方向 W)。 计算数据值,代表最佳拟合圆周围中心(W)的相等角度(θ)的点,而不是围绕转盘旋转中心(S)的等角度(α)。 改进的校正精度允许机器相对于转台(7)容忍工件(23)更大的偏心度,从而减少了精确对准工件的必要性。