A calibration method of machine vision measurement system by using a micro displacement stage

2006 ◽  
Author(s):  
Ming Zhou ◽  
Yuekang Shan ◽  
Yu Ji
Keyword(s):  
Machine Vision ◽  
Measurement System ◽  
Calibration Method ◽  
Vision Measurement

2-D Circle Measurement System for Small Rule Parts Based on Machine Vision

2011 ◽  
Vol 291-294 ◽  
pp. 2624-2629 ◽  
Author(s):  
Qing Hua Wu ◽  
Na Dai ◽  
Tao He
Keyword(s):  
Machine Vision ◽  
Measurement System ◽  
Vision System ◽  
Measured Data ◽  
Machine Vision System ◽  
Mechanical Parts ◽  
Vision Measurement ◽  
Ring Radius ◽  
On Line ◽  
Calibration Mark

A Circle-shape is an important figure in most small rule mechanical parts, and usually be measured to get the radius or used as a stand calibration mark. In this paper, a 2-D circle measurement system for small rule mechanical parts based on machine vision is designed and built. The basic components and work principle of the machine vision measurement system are introduced, and the measurement produce is designed and discussed. An available algorithm for circle contour detected and fitted is described. Using this algorithm, the measurement software flow and architecture are built and the software system realized in the Microsoft visual studio program platform. Certainly, the calibration of machine vision system is introduced also. Using the system and method introduced above, an experiment is designed to measure the outer ring radius of one certain model bearing. The measured data is processed and analyzed. Through the experiment and result, it can be found that the measurement system can get relatively high precision and the measurement method is relatively steady, and the system precision and speed can be suit for the demand of on-line and real-time circle measurement.

Research on Calibration Method of Linear Structured Light Vision Measurement System

2014 ◽  
Vol 644-650 ◽  
pp. 1234-1239
Author(s):  
Tao He ◽  
Yu Lang Xie ◽  
Cai Sheng Zhu ◽  
Jiu Yin Chen
Keyword(s):  
High Precision ◽  
Measurement System ◽  
Structured Light ◽  
Target Position ◽  
Calibration Method ◽  
Measurement Model ◽  
Sensor Calibration ◽  
Vision Measurement ◽  
Set Up ◽  
Structured Light Vision

This template explains and demonstrates how to design a measurement system based on the size of the linear structured light vision, the system could works at realized the high precision and fast measurement of the size of mechanical parts, and accurate calibration of the system. First of all, this paper set up the experimental platform based on linear structured light vision measurement. Secondly, this paper established a system of measurement model, and puts forward a new method of calibration of structured light sensor and set up the mathematical model of sensor calibration. This calibration method only need to use some gage blocks of high precision as the target, the target position need not have a strict requirements, and the solving process will be more convenient, much easier to field use and maintenance. Finally, measuring accuracy on the system by gage blocks with high precision is verified, the experiment shows that measurement accuracy within 0.050 mmin the depth of 0-80 - mm range. This system can satisfy the demands of precision testing of most industrial parts .with its simple calibration process and high precision, it is suitable for the structured light vision calibration.

Novel Calibration Method for Axes in Line Structured Light Vision Measurement System

2012 ◽  
Vol 39 (11) ◽  
pp. 1108014 ◽  
Author(s):  
陈新禹 Chen Xinyu ◽  
马孜 Ma Zi ◽  
陈天飞 Chen Tianfei ◽  
李鹏 Li Peng
Keyword(s):  
Measurement System ◽  
Structured Light ◽  
Calibration Method ◽  
Vision Measurement ◽  
Structured Light Vision

A Study of 3d Coordinate Measuring Based on Binocular Stereo Vision

2015 ◽  
Vol 740 ◽  
pp. 531-534 ◽  
Author(s):  
Tao He ◽  
Jiu Yin Chen ◽  
Xiang Hu ◽  
Xian Wang
Keyword(s):  
Machine Vision ◽  
Stereo Vision ◽  
Calibration Method ◽  
Measurement Model ◽  
Vision Measurement ◽  
Model Based ◽  
Binocular Stereo Vision ◽  
Binocular Stereo ◽  
Stereo Vision Measurement

It is important to obtain the 3d coordinate in the field of measuring. How accurate, fast, convenient to obtain the 3d coordinate affects the accuracy and reliability of measurement directly. Through studying the basic theories of machine vision this paper focus on the study of a stereo vision measurement model based on the intersecting axis. In view of the parameters in the model of binocular stereo vision, this paper uses the Zhang Zhengyou calibration method to calibrate the system of Stereo vision. In order to test the accuracy of the system, this paper measures the distance of two standard circular. Finally, the machining experiment validates the proposed method.

scholarly journals Automatic Laser Interferometer And Vision Measurement System For Stripe Rod Calibration

2015 ◽  
Vol 22 (4) ◽  
pp. 491-502 ◽  
Author(s):  
Min Zhao ◽  
Qiu-Hong Huang ◽  
Ling-Jian Zhu ◽  
Zong-Ming Qiu
Keyword(s):  
Measurement System ◽  
Measurement Method ◽  
Laser Interferometer ◽  
Image Data ◽  
Ccd Camera ◽  
Calibration Method ◽  
Feedback Signal ◽  
Long Distance ◽  
Loop Control ◽  
Vision Measurement

Abstract In order to calibrate the stripe precision of a leveling rod, an automatic laser interferometer and a vision measurement system were designed by Xi’an University of Technology in China. The rod was driven by a closed-loop control and the data were collected at the stop state to ensure precision. The laser interferometer provided not only the long distance data but also a position feedback signal in the automatic control loop. CCD camera and a vision measurement method were used to inspect the stripe edge position and defect. A pixel-equivalent self-calibration method was designed to improve precision. ROI (regions of interest) method and an outline tracing method were designed to quickly extract multiple stripe edges. A combination of the image data with the interferometer data reduces control difficulty and ensures the measurement accuracy. The vision measurement method reached sub-pixel precision and the defective edges were reported. The system can automatically calibrate a stripe leveling rod with a high degree of efficiency and precision.

Efficient Calibration Method for Line-Structured Light Vision Measurement System

2019 ◽  
Vol 56 (22) ◽  
pp. 221505
Author(s):  
李爱娟 Li Aijuan ◽  
辛睿 Xin Rui ◽  
武栓虎 Wu Shuanhu
Keyword(s):  
Measurement System ◽  
Structured Light ◽  
Calibration Method ◽  
Vision Measurement ◽  
Structured Light Vision

The Research of Vision Measurement System Based on Sequence Image

2012 ◽  
Vol 562-564 ◽  
pp. 1340-1343
Author(s):  
Kai Niu ◽  
Hui Yu Xiang ◽  
Jia Liu ◽  
Bao An Han
Keyword(s):  
Image Processing ◽  
Machine Vision ◽  
Measurement System ◽  
Future Research ◽  
Multiple Images ◽  
Vision Measurement ◽  
The Future ◽  
Research Intensity ◽  
Practical Measurement

In recent years, with the research intensity of machine vision in universities are increased ceaselessly, the achievement in machine vision’ field is gradually applied to all walks of life. This paper mainly discusses how the theory of machine vision applied in the practical measurement, and develops the overall measurement platform. Through the program operating in the computer, finally realizes the control of platform operation. It can collect multiple images; what’s more realize image processing and world coordinate calculation, providing a platform for the future research and application.

A Calibration Method for High Precision Vision Measurement System

2014 ◽  
Vol 543-547 ◽  
pp. 1005-1008
Author(s):  
Ping Zhao ◽  
Wen Zhen Zhao ◽  
Zhen Yun Duan
Keyword(s):  
Measurement System ◽  
Calibration Method ◽  
Detection Algorithm ◽  
Level Gauge ◽  
Calibration Function ◽  
Gauge Groups ◽  
Vision Measurement ◽  
Imaging Characteristics ◽  
Sensor Position ◽  
Straight Line

In order to realize precision measurement for the computer vision measurement system, a system comprehensive calibration method based on straight line imaging characteristics is proposed. The method uses parallel straight line edges of general 00 level gauge groups to comprehensively calibrate the measurement system. It establishes the calibration function that describes the corresponding relationship between the imaging point location and space point position, and then determines the coefficient of the calibration function according to the linear characteristic of gauge block measurement surface edges imaging. This method is simple to operate and is easy to realize and has good versatility. It can comprehensively correct all kinds of system errors such as the optical distortion, the perspective error, the sensor position error and location error of edge detection algorithm. Repeated measurement experiments for the gauges show that the precision of the measurement system can reach by means of this calibration method.

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