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    • 5. 发明授权
    • Apparatus for calibration of an angular displacement
    • 用于校准角位移的装置
    • US5341702A
    • 1994-08-30
    • US39188
    • 1993-04-13
    • Raymond J. ChaneyJeffrey Graham
    • Raymond J. ChaneyJeffrey Graham
    • E21B3/04G01B11/26G01D5/34G01D5/38G01D18/00G12B5/00B23B29/24B23Q16/00
    • G01D18/00E21B3/04G01B11/26G01D5/341Y10T74/14Y10T74/1418Y10T74/1447Y10T74/1476
    • A system for calibrating a rotary table (10) includes an indexing table (20) (which is a Hirth coupling table) and an angular interferometer (100), together with a control (200). The indexing table is mechanically coupled to the rotary table (this being the only connection between the rotary table to be calibrated and the calibration system), and the interferometer is set up to measure rotation of the indexing table. During rotation of the rotary table (10) to a target angle, the control (200) monitors the interferometer reading, and when this reading exceeds a predetermined threshold, actuates a drive motor (240) of the table (20) to counter rotate the table, thereby to maintain the optics (106) of the interferometer in alignment with the laser beams (L2, L3) and thus enable continuous measurement of the position of the indexing table.
    • PCT No.PCT / GB92 / 01653 Sec。 371日期:1993年4月13日 102(e)日期1993年4月13日PCT提交1992年9月10日PCT公布。 公开号WO93 / 05360 日期:1993年3月18日。用于校准旋转工作台(10)的系统与控制装置(200)一起包括分度台(20)(其是Hirth耦合台)和角度干涉仪(100)。 分度台机械耦合到旋转台(这是待校准的旋转台和校准系统之间的唯一连接),并且设置干涉仪以测量分度台的旋转。 在旋转台(10)旋转到目标角度期间,控制器(200)监测干涉仪读数,并且当该读数超过预定阈值时,致动工作台(20)的驱动马达(240)以使 从而将干涉仪的光学元件(106)保持与激光束(L2,L3)对准,从而能够连续测量分度台的位置。
    • 7. 发明授权
    • Method of and apparatus for calibration of machines
    • 机器校准方法和设备
    • US5007006A
    • 1991-04-09
    • US264968
    • 1988-10-25
    • Benjamin R. TaylorMark A. V. ChapmanJeffrey Graham
    • Benjamin R. TaylorMark A. V. ChapmanJeffrey Graham
    • G01B21/00G01B11/00G01B21/04
    • G01B11/005G01B21/042
    • A method of and apparatus for dynamically calibrating a machine are disclosed in which a laser interferometer is provided in addition to the machine scales for taking independent measurements of a movement of a machine part while the part is in motion. As the moving machine part reaches pre-determined distances along its movement (e.g. every inch) the readings of the interferometer and the machine scales relating to the movement of the machine part are recorded and compared. Any difference is recorded for use in mapping the machine errors. In the preferred form of the invention a reflector is mounted on the machine spindle adjacent to, or in place of, a tool or measuring probe, and its movements are measured by the interferometer. The interferometer is arranged to generate a signal as each predetermined distance is reached and an infra-red signal is transmitted from the interferometer to a receiver on the machine spindle which is wired into the probe or tool detection circuits. This signal initiates reading of the machine scales in the same manner as the probe would normally operate. In this way not only can physical errors in the machine movement be corrected but time delays in the electrical signalling system can be allowed for.
    • PCT No.PCT / GB88 / 00167 Sec。 371日期:1988年10月25日第 102(e)日期1988年10月25日PCT提交1988年3月7日PCT公布。 出版物WO88 / 06714 公开了一种用于动态校准机器的方法和装置,其中除了机器秤之外还提供激光干涉仪,以在部件运动时对机器部件的运动进行独立测量。 随着移动机器部件沿其移动(例如每英寸)达到预定距离,记录和比较干涉仪的读数和与机器部件的移动相关的机器尺寸。 记录任何差异用于映射机器错误。 在本发明的优选形式中,反射器安装在机器主轴上邻近或代替工具或测量探针,并且其运动由干涉仪测量。 干涉仪布置成当达到每个预定距离时产生信号,并且将红外信号从干涉仪传输到连接到探针或工具检测电路中的机器主轴上的接收器。 该信号以与探头正常工作相同的方式启动机器刻度的读数。 以这种方式,不仅可以校正机器运动中的物理错误,而且可以允许电信号系统中的时间延迟。