• CN:11-2187/TH
  • ISSN:0577-6686

›› 1994, Vol. 30 ›› Issue (6): 53-57.

• 论文 • 上一篇    下一篇

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用于CNC位置环测量的外差激光干涉仪的研究

赵洋;李达成   

  1. 清华大学
  • 发布日期:1994-11-01

STUDY ON LASER HETERODYNE INTERFEROMETER FOR POSITIONING A CNC MACHINE TOOL

Zhao Yang;Li Dacheng   

  1. Qinghua University
  • Published:1994-11-01

摘要: 提出了用声光调制器实现的外差干涉仪,采用了相位变化整数周期和周期测量的外差干涉信号处理方法,不仅使干涉仪的测量分辨率提高到λ/2000,同时提高了测量镜允许运动速度,解决了用于大动态范围位移的态动测量问题。该外差干涉测量系统可以用作精密数控中位置环的测量手段。

关键词: 数控机床, 外差干涉, 位置测量, 相位测量

Abstract: A laser heterodyne interferometer with a AOM device is proposed. It employsa new method of processing heterodyne signal, that is to measure the integer and fractional period of the phase difference changing of the signals, to promote measuring resolution which reaches to λ/2000 and measuring range, and to increase allowable speed of the target moving at the same time. This method makes the interferometer be able to measure the displacement with a large range dynamic. The interferometer can be applied to the positioning in a precision/super-precision CNC machine tool.

Key words: CNC machine tool, Heterodyne interferometer, Phase measurement, Positioning