公开(公告)号：US4807152A

公开(公告)日：1989-02-21

申请号：US20436

申请日：1987-03-02

Applicant: Hugh R. Lane ,  Peter D. Onyon

Inventor： Hugh R. Lane ,  Peter D. Onyon

IPC: G01B21/00 ,  G01B7/008 ,  G01B7/28 ,  G01B7/34 ,  G01B21/20 ,  G01B21/22 ,  G01B21/30 ,  G01B5/00 ,  G01B7/00

CPC classification number: G01B7/282 ,  G01B7/008 ,  G01B7/345

Abstract: Metrological apparatus, particularly for measuring form, has a turntable 4 and a transducer 14 and associated stylus 12 mounted so that the tip 12a of the stylus is displaceable radially and vertically relative to the turntable 4. The problem of obtaining both high resolution and large range of operation is solved by using a transducer/stylus 12,14 having a resolution of 12 nanometers and a range of only 0.4 mm and mounting the transducer 14 on an arm 10 which is driven radially and/or vertically by a computer 30 in response to the output from the transducer 14 to cause the stylus 12 to follow the workpiece surface. High resolution data defining the rotary position of the turntable 4 and the radial and vertical position of the transducer 14 is provided by a photodetector/optical grating arrangement 23, 21, 31; 27, 19, 43 and associated interpolators 42, 44, 46. A novel computer architecture comprising a host 22, master 30 and slaves 33, 35, 37 provides an efficient system for controlling the apparatus and gathering data. Efficient gathering of data is further assisted by the provision of means to cause the stylus 12 to traverse the surface of the workpiece at a constant speed, particularly as a function of the radial position of the transducer.

Abstract translation: 特别是测量形式的计量装置具有转盘4和传感器14以及相关的触控笔12，其安装成使得触针的尖端12a相对于转盘4可径向和垂直地位移。获得高分辨率和大范围的问题 通过使用具有12纳米分辨率和仅0.4mm的范围的换能器/触针12,14来解决，并将换能器14安装在臂10上，臂10响应于计算机30而被径向和/或垂直地驱动 来自换能器14的输出使触针12跟随工件表面。 通过光电检测器/光栅装置23,21,31提供限定转盘4的旋转位置的高分辨率数据和换能器14的径向和垂直位置。 包括主机22，主机30和从机33,35,37的新型计算机架构提供了一种用于控制设备和收集数据的有效系统。 进一步通过提供使得触针12以恒定速度横穿工件表面的手段，特别是作为换能器的径向位置的函数来有效地收集数据。

公开(公告)号：US4807164A

公开(公告)日：1989-02-21

申请号：US940506

申请日：1986-12-11

Applicant: Peter D. Onyon

Inventor： Peter D. Onyon

IPC: G01P3/42 ,  G01P3/36 ,  G01P3/44 ,  G01P3/46 ,  G01R23/02

CPC classification number: G01P3/44 ,  G01P3/36 ,  G01R23/02

Abstract: Apparatus for measuring velocity utilizes quadrature input signals provided by a transducer and divides the derivative of one of the signals by the magnitude of the other to obtain a measure of velocity. The apparatus may be digital or analog. It is particularly suitable for the measurement of velocity where the quadrature signals are provided by an optical grating and transducer arrangement.

Abstract translation: 用于测量速度的装置利用由换能器提供的正交输入信号，并将其中一个信号的导数除以另一个信号的幅度，以获得速度的量度。 该装置可以是数字或模拟的。 它特别适用于通过光栅和换能器装置提供正交信号的速度测量。

公开(公告)号：US4823000A

公开(公告)日：1989-04-18

申请号：US100020

申请日：1987-09-23

Applicant: Peter D. Onyon

Inventor： Peter D. Onyon

IPC: G05D3/12 ,  G01D5/243 ,  G01D5/244 ,  G01D5/245 ,  H03M1/00 ,  G01D5/34

CPC classification number: G01D5/243 ,  H03M1/206 ,  H03M1/303

Abstract: In a position encoder an interpolator derives from quadrature input signals a series of sine waves equispaced in phase. These are applied to respective comparators which output a binary zero or a binary one according to whether the respective sine wave is above or below the zero crossing point. Interpolation is achieved by identifying an adjacent pair of said sine waves of which one has a value above and the other a value below zero and a counter stores a number indicative of this pair of signals.

Abstract translation: 在位置编码器中，内插器从正交输入信号中产生一系列相位相等的正弦波。 这些被应用于根据相应的正弦波是否在过零点之上或之下输出二进制零或二进制的相应比较器。 插值是通过识别一个相邻的正弦波对，其中一个具有高于上述值的值，另一个值低于零，并且计数器存储指示该对信号对的数字。