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    • 5. 发明申请
    • METROLOGICAL INSTRUMENT
    • 计量仪表
    • WO9508096A2
    • 1995-03-23
    • PCT/GB9402007
    • 1994-09-14
    • RANK TAYLOR HOBSON LTDSEDDON PETERCOLEMAN ALAN JOHNMILLS MICHAELASTON NIGELONYON DEANDIXEY TREVOR
    • SEDDON PETERCOLEMAN ALAN JOHNMILLS MICHAELASTON NIGELONYON DEANDIXEY TREVOR
    • G01B21/30G01B7/28G01B7/34G01D3/02G01D5/22
    • G01B7/34G01B7/28G01D3/02G01D5/2216
    • A portable metrological instrument for measuring surface finish parameters has a main housing (1) which sits on a workbench (5). A slidable arm (3) can be extended or retracted over the bench (5) so as to move a stylus (21) over a workpiece (25). The stylus (21) is fitted to a gauge (19) mounted to the end of the arm (3). The mounting includes a vertically movable slider (15) which incorporates a mechanism for lifting the stylus (21) away from the workpiece (25) and lowering it back. The operation of the instrument is controlled by modular software which can be reprogrammed using an external device, and the machine is operated by a control panel (37) on the housing (1) or by an identical control panel (53) on a remote controller (55). The gauge includes an inductive sensor (75, 77), and the associated circuit includes automatically adjustable error cancelling devices (177, 179). The control system uses the sensed position of the arm (3) to estimate the speed of the motor (145) which drives the arm (3), avoiding the need for a shaft encoder on the motor (145).
    • 用于测量表面光洁度参数的便携式计量仪器具有位于工作台(5)上的主壳体(1)。 可滑动臂(3)可以在工作台(5)上延伸或缩回,以便将工具(25)上的触针(21)移动。 触针(21)装配到安装到臂(3)的端部的量规(19)上。 安装件包括可垂直移动的滑块(15),其包括用于将触针(21)远离工件(25)提升并将其降回的机构。 仪器的操作由可以使用外部设备重新编程的模块化软件控制,并且机器由壳体(1)上的控制面板(37)或遥控器上的相同控制面板(53)操作 (55)。 仪表包括电感式传感器(75,77),相应的电路包括自动调节的误差消除装置(177,179)。 控制系统使用感测到的臂(3)的位置来估计驱动臂(3)的马达(145)的速度,避免了在马达(145)上需要轴编码器。