微型铣刀外径视觉测量的不确定度

王磊; 郭淑霞; 张凤玲; 冯彬; 张建城

doi:10.3788/OPE.20122004.0880

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微型铣刀外径视觉测量的不确定度

信息科学 | 更新时间：2020-08-12

- 微型铣刀外径视觉测量的不确定度
- Uncertainty in vision based diameter measurement of mini milling cutter
- 光学精密工程 2012年20卷第4期页码：880-887
- 作者机构：
  
  1. 厦门大学机电工程系,福建厦门,361005
  2. 厦门钨业股份有限公司,福建厦门,361005
- 作者简介：
- 基金信息：
  
  福建省自然科学基金资助项目(No.2011J01361)()
- DOI：10.3788/OPE.20122004.0880
  中图分类号： TP242.62;TB92
- 收稿日期：2011-12-02，
  
  修回日期：2011-12-29，
  
  网络出版日期：2012-04-22，
  
  纸质出版日期：2012-04-22
- 稿件说明：
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王磊, 郭淑霞, 张凤玲, 冯彬, 张建城. 微型铣刀外径视觉测量的不确定度[J]. 光学精密工程, 2012,(4): 880-887

WANG Lei, GUO Shu-xia, ZHANG Feng-ling, FENG Bin, ZHANG Jian-cheng. Uncertainty in vision based diameter measurement of mini milling cutter[J]. Editorial Office of Optics and Precision Engineering, 2012,(4): 880-887
王磊, 郭淑霞, 张凤玲, 冯彬, 张建城. 微型铣刀外径视觉测量的不确定度[J]. 光学精密工程, 2012,(4): 880-887 DOI： 10.3788/OPE.20122004.0880.

WANG Lei, GUO Shu-xia, ZHANG Feng-ling, FENG Bin, ZHANG Jian-cheng. Uncertainty in vision based diameter measurement of mini milling cutter[J]. Editorial Office of Optics and Precision Engineering, 2012,(4): 880-887 DOI： 10.3788/OPE.20122004.0880.

摘要

建立了基于机器视觉的测量系统

实现了微型铣刀外径的在线测量

并对测量不确定度进行了分析。测量系统由背光源、夹头与旋转平台、旋转编码器、摄像机和相应的测量软件组成。系统运行时

铣刀匀速旋转

由旋转编码器触发相机对其进行采样拍照并完成测量。从照明光源平行性、摄像机的镜头畸变与CCD噪声、调焦效果、待测物体表面几何特性、算法设计5个方面分析了测量结果不确定度来源及其影响。实验表明

当系统采样率不足时

对于铣刀外径测量不确定度影响最大的是待测物体表面几何特性;在采样率足够大的情况下

外径测量不确定度主要由光源平行性确定。本文系统采样率为33 frame/circle

系统测量不确定度为4 m

可满足生产要求。

Abstract

A machine vision system is proposed to measure the diameter of a mini milling cutter on line

and the measurement uncertainty is analyzed in this paper. The system consists of a back-light source

a rotate stage

a rotary encoder

a camera and corresponding software. While the milling cutter rotates

the camera is triggered by the rotary encoder and a series of images are captured. The sources of uncertainty and their effects are analyzed

including the parallelism of the light source

lens distortion

CCD noise

focusing situation

the geometric properties of tested objects and the algorithm design. According to results of experiments

the uncertainty mainly depends on the geometric property of the tested object when sampling rate is not enough

otherwise

it is mainly relative to the parallelism of the light source. In the experiment performed

the system uncertainty is 4 m with a sampling rate of 33 frame/circle

both accuracy and efficiency meet the requirement of manufacturing.

关键词

Keywords

references

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