基于二维轮廓点云的螺纹中径计算

陈盛; 赵东标; 陆永华; 刘凯; 章永年

doi:10.3788/OPE.20152306.1791

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基于二维轮廓点云的螺纹中径计算

信息科学 | 更新时间：2020-08-13

- 基于二维轮廓点云的螺纹中径计算
- Calculation of thread pitch diameters based on two dimensional profile point clouds
- 光学精密工程 2015年23卷第6期页码：1791-1799
- 作者机构：
  
  1. 南京航空航天大学机电学院,江苏南京,210016
  2. 南京农业大学机械工程系南京,210031
- 作者简介：
- 基金信息：
  
  国家973重点基础研究发展计划资助项目(No. 2014CB046501)();国家自然科学基金资助项目(No.51175261)();高等学校博士学科点专项科研基金资
- DOI：10.3788/OPE.20152306.1791
  中图分类号： TG85;TH701
- 收稿日期：2015-02-02，
  
  修回日期：2015-04-01，
  
  纸质出版日期：2015-06-25
- 稿件说明：
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陈盛, 赵东标, 陆永华等. 基于二维轮廓点云的螺纹中径计算[J]. 光学精密工程, 2015,23(6): 1791-1799

CHEN Sheng, ZHAO Dong-biao, LU Yong-hua etc. Calculation of thread pitch diameters based on two dimensional profile point clouds[J]. Editorial Office of Optics and Precision Engineering, 2015,23(6): 1791-1799
陈盛, 赵东标, 陆永华等. 基于二维轮廓点云的螺纹中径计算[J]. 光学精密工程, 2015,23(6): 1791-1799 DOI： 10.3788/OPE.20152306.1791.

CHEN Sheng, ZHAO Dong-biao, LU Yong-hua etc. Calculation of thread pitch diameters based on two dimensional profile point clouds[J]. Editorial Office of Optics and Precision Engineering, 2015,23(6): 1791-1799 DOI： 10.3788/OPE.20152306.1791.

摘要

基于轮廓点的螺纹多参数综合测量方法由于螺纹工件的定位误差、非均匀磨损等情况会导致中径计算偏差

因此

提出了一套基于二维轮廓点云的螺纹中径计算方法.该方法利用三次样条插值均匀密化采样数据

再用稳健高斯回归滤波处理得到轮廓滤波中线;然后通过定义相邻两段牙侧线之间距离均方差最小的目标函数

利用复合形-模拟退火(CMSA)算法求解出实际螺纹轮廓的中径线;最后根据所求中径线计算出螺纹中径参数.实验结果表明:当

X、Y、Z

轴的轴向定位偏差为1 mm

旋转偏差为2°时

所得到的中径测量误差比范一保和TONG Q等人的方法平均减小17.23%和96.93%

说明所提出的计算方法可以有效减少定位偏差对中径参数计算的影响.提出的计算方法具有通用性

可应用于接触式和非接触式采样得到的二维螺纹轮廓点云数据.

Abstract

The multi-parameter measurement of a thread based on profile points may show calculation errors for thread pitch diameters owing to the alignment deviations and inhomogeneous abrasion of thread work-pieces. Therefore

a new method for calculating the thread pitch diameters based on the 2-dimensional profile point clouds was proposed. The cubic spline interpolation was used to increase the data point densification uniformly

and the robust Gauss regression filter was adopted to get the midline of contour. Then

an objective function was put forward to minimize the mean square error of the distance between two adjacent flank segments

and the complex simulated annealing algorithm was adopted to solve the function to get the pitch line. Finally

the pitch diameter parameters were calculated with the obtained pitch line. The experimental results show that the measurement error of pitch diameter obtained by the proposed method is reduced by 17.23% and 96.93% respectively compared with the methods from FAN Y B and TONG Q

et al

when the alignment deviation along axes directions of

is 1 mm and the rotation deviation of each axis is 2°. The proposed method effectively reduces the influence of alignment deviations on the thread pitch diameters

and can be used for two dimensional point cloud data by both contact and non-contact 2-dimensional scannings.

关键词

Keywords

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