Detection of three-axis angles by an optical sensor
Detection of three-axis angles by an optical sensor
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DOI：
10.1016/j.sna.2008.12.019
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发表时间：
2009-03-25
影响因子：
4.6
通讯作者：
Gao, Wei
中科院分区：
文献类型：
--
作者：
Saito, Yusuke;Arai, Yoshikazu;Gao, Wei
本文介绍了一种测量三轴角度（滚动角 Delta theta(x)、俯仰角 Delta theta(y)、偏航角 Delta theta(z)）的光学方法。通过采用衍射光栅代替平面镜作为目标反射镜，将激光自准直方法从两轴测角改进为三轴测角。利用衍射光栅反射的不同衍射光斑，可以通过三种方法计算三轴角度分量。方法1使用三束光束，分别是0级和+/-1级衍射光斑。方法2和方法3都使用两个光点。前者使用+/-1级衍射光斑，后者将0级与+1级或-1级衍射光斑组合。还设计并制作了原型三轴角度传感器，从传感器输出的灵敏度、线性度和分辨率方面比较三种方法的特性。 (C) 2008 Elsevier B.V. 保留所有权利。
This article describes an optical method for measurement of three-axis angles (roll angle Delta theta(x), pitch angle Delta theta(y), yaw angle Delta theta(z)). The laser autocollimation method is improved from two-axis angle measurement to three-axis angle measurement by employing a diffraction grating instead of a plane mirror as the target reflector. The three-axis angle components can be calculated by three methods Of using different diffraction light spots reflected from the diffraction grating. Method 1 uses three beams, which are the 0th-order and the +/- 1st-order diffraction light spots. Both Method 2 and Method 3 use two light spots. The former uses the +/- 1st-order diffraction light spots and the latter combines the 0th-order with the +1st-order or the -1st-order diffraction light spots. A prototype three-axis angle sensor is also designed and fabricated to compare the characteristics of the three methods from the viewpoints of sensitivity, linearity and resolution of the sensor output. (C) 2008 Elsevier B.V. All rights reserved.