...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical engineering >Two-axes tilt sensing using circular gratings moire
【24h】

Two-axes tilt sensing using circular gratings moire

机译：使用圆形光栅莫尔条纹的两轴倾斜感测

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A circular grating moire method is proposed for sensing the tilt magnitude (θ) and tilt direction (α) for tilt about two orthogonal axes. A device consisting of a pair of fixed (upper) and semifloating (lower) circular gratings inside a water-filled acrylic container has been developed. The moire pattern images for tilt angles ranging from 0 deg to 7 deg are captured using a webcam, processed by low-pass filtering and transformed from Cartesian-to-polar coordinates. This is followed by column-wise fringe center localization using polynomial fitting, unwrapping of the extracted fringe centers, and sine-curve fitting. The peak-to-valley height (h_(pv)) and phase shift (φ) of the unwrapped and fringe centers were determined from the fitted sine curve. The relationship between hpv and 9 is found to be parabolic with the y-intercept at its minimum point, whereas that between q> and a is linear. From the tilt sensing experiments, the mean absolute errors in θ and α are found to be 0.16 deg and 3.1 deg, respectively, with uncertainty of ±0.027 deg and ±0.5 deg at 95% confidence level. The proposed device is capable of sensing tilt magnitude and direction along two orthogonal tilt planes and can potentially be applied in landslide monitoring. Moire pattern; tilt sensing; two axes.
机译：提出了一种圆光栅莫尔条纹方法，用于感测关于两个正交轴的倾斜的倾斜幅度（θ）和倾斜方向（α）。已经开发了一种在充满水的丙烯酸容器内由一对固定（上部）和半漂浮（下部）圆形光栅组成的设备。使用网络摄像头捕获倾斜角范围从0度到7度的莫尔条纹图像，并通过低通滤波处理并从笛卡尔坐标系转换为极坐标。接下来是使用多项式拟合的列式条纹中心定位，展开的条纹中心展开和正弦曲线拟合。根据拟合的正弦曲线确定展开和边缘中心的峰谷高度（h_（pv））和相移（φ）。发现hpv与9之间的关系与y截距的最小值呈抛物线关系，而q>与a之间的关系则为线性关系。从倾斜检测实验中，发现θ和α的平均绝对误差分别为0.16度和3.1度，在95％置信度下的不确定度为±0.027度和±0.5度。所提出的设备能够检测沿两个正交倾斜平面的倾斜幅度和方向，并有可能应用于滑坡监测。云纹图案；倾斜感应两个轴。

著录项

  • 来源
    《Optical engineering》 |2019年第4期|044103.1-044103.14|共14页
  • 作者

    Pei Ying Tan; Kin Sam Yen; Fauziah Ahmad; Mani Maran Ratnam;

  • 作者单位

    Universiti Sains Malaysia, School of Mechanical Engineering, Engineering Campus, Penang, Malaysia;

    Universiti Sains Malaysia, School of Mechanical Engineering, Engineering Campus, Penang, Malaysia;

    Universiti Sains Malaysia, School of Civil Engineering, Engineering Campus, Penang, Malaysia;

    Universiti Sains Malaysia, School of Mechanical Engineering, Engineering Campus, Penang, Malaysia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号