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| 一种基于光栅的滚转角测量新方法 | |
| 引用本文： | 翟玉生,冯其波,张斌.一种基于光栅的滚转角测量新方法[J].光学学报,2008,28(s2):112-116. |
| 作者姓名： | 翟玉生 冯其波 张斌 |
| 作者单位： | 翟玉生:北京交通大学发光与光信息技术教育部重点实验室, 北京 100044 冯其波:北京交通大学发光与光信息技术教育部重点实验室, 北京 100044 张斌:北京交通大学发光与光信息技术教育部重点实验室, 北京 100044 |
| 基金项目： | 国家自然科学基金(50675017)资助课题。 |
| 摘 要： | 提出了一种利用一维平面透射光栅作为敏感器件的滚转角测量新方法。利用聚焦透镜及光电位置探测器组成接收测量单元, 避免了直线度误差带来的影响; 利用光栅的±1级衍射光束构成双光路差动测量, 基本避免了俯仰、偏摆角的串扰, 实现了误差分离, 同时增强了抗干扰能力。通过详细的理论分析, 论证了方案的可行性, 并在此基础上通过实验得到了定标曲线, 其线性相关度为1, 滚转角测量的角度分辨率可以达到0.6″。测量方法简单灵活, 仅需更换不同线数的光栅便可满足不同测量精度的要求。 |
| 关 键 词： | 测量 滚转角 光栅 误差分离 双光路差动测量 |
A Novel Method for Roll Measurement Based on Grating |
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| Abstract: | A novel method for roll measurement is presented based on one-dimensional grating. The effects of straightness errors are avoided by using the measuring unit consisting of a focusing lens and photodetector. This method realizes errors separation, avoiding crosstalk of pitch angle and yaw angle, and enhances the ability of anti-interference by adopting double optical paths differential measurement based on the ±1 order diffractive beams. Feasibility of the method is analyzed in detail. Calibration curve, whose linear dependency is 1, is obtained by experiment. The results show that resolution of the rolling error is less than 0.6″. The method is simple and flexible enough to meet the different accuracy demands just by choosing the different gratings. |
| Keywords: | measurement roll angle grating errors separation double optical paths differential measurement |