Research on the on-line dimensional accuracy measurement method of conical spun workpieces based on machine vision technology

Measurement ◽  
2019 ◽  
Vol 148 ◽  
pp. 106881 ◽  
Author(s):  
Gangfeng Xiao ◽  
Yongting Li ◽  
Qinxiang Xia ◽  
Xiuquan Cheng ◽  
Weiping Chen
Keyword(s):  
Machine Vision ◽  
Measurement Method ◽  
Dimensional Accuracy ◽  
Accuracy Measurement ◽  
On Line

scholarly journals On-line Measurement Method and Technical Scheme of Transmission Line Crossing Point Based on Machine Vision

2021 ◽  
Vol 2143 (1) ◽  
pp. 012035
Author(s):  
Jie Tang ◽  
Zhidu Huang ◽  
Zhimei Cui
Keyword(s):  
Machine Vision ◽  
Transmission Line ◽  
Measurement Method ◽  
Accuracy Measurement ◽  
Line Measurement ◽  
On Line ◽  
Increasing Demand ◽  
Measurement Efficiency ◽  
Crossing Point ◽  
Line Crossing

Abstract With the increasing demand for high voltage and UHV transmission, higher and higher requirements are put forward for transmission line monitoring and fault diagnosis. The traditional line measurement method has many shortcomings, which cannot ensure the measurement accuracy, measurement efficiency and high cost. Based on this, this paper first studies the principle of machine vision on-line measurement, then analyses the on-line measurement process of transmission line crossing point based on machine vision, and finally gives the error source and amelioration measures of transmission line crossing point on-line measurement.

scholarly journals Research on the Dimensional Accuracy Measurement Method of Cylindrical Spun Parts Based on Machine Vision

2018 ◽  
Vol 167 ◽  
pp. 03010
Author(s):  
Xiao Gangfeng ◽  
Zhong Xingwei ◽  
Shen Weixian ◽  
Xia Qinxiang ◽  
Chen Weiping
Keyword(s):  
Machine Vision ◽  
Measurement Method ◽  
Dimensional Accuracy ◽  
New Method ◽  
Edge Detector ◽  
Manual Measurement ◽  
Accuracy Measurement ◽  
Canny Edge ◽  
Low Efficiency ◽  
Relative Errors

A new method for measuring the dimensional accuracy of the cylindrical spun parts based on machine vision was proposed to overcome the artificial deviation and low efficiency of manual measurement. The image acquisition system of machine vision was built up. The methods of image processing and edge extraction of cylindrical spun parts were studied. The straightness and ovality of the cylindrical spun parts were obtained by the proposed new method. The results showed that the edge contour of the cylindrical spun parts extracted by Canny edge detector is better than Sobel and Prewitt edge detector. The dimensional accuracy of the cylindrical spun parts can be obtained accurately by the proposed measurement method based on machine vision. The relative errors of the straightness and ovality between the machine vision and the manual measurement are less than 10%.

A machine vision system for on-line removal of contaminants in wool

Mechatronics ◽  
2006 ◽  
Vol 16 (5) ◽  
pp. 243-247 ◽  
Author(s):  
Zhenwei Su ◽  
Gui Yun Tian ◽  
Chunhua Gao
Keyword(s):  
Machine Vision ◽  
Vision System ◽  
Machine Vision System ◽  
On Line ◽  
Removal Of Contaminants

Development of a PID based on-line tar measurement method – Proof of concept

Fuel ◽  
2013 ◽  
Vol 113 ◽  
pp. 113-121 ◽  
Author(s):  
Mozhgan Ahmadi ◽  
Harrie Knoef ◽  
Bert Van de Beld ◽  
Truls Liliedahl ◽  
Klas Engvall
Keyword(s):  
Measurement Method ◽  
Proof Of Concept ◽  
On Line

Rotating Accuracy Measurement System of Spindle Based on Three Point Method

2013 ◽  
Vol 333-335 ◽  
pp. 167-171
Author(s):  
Peng Qing Wang ◽  
Hong Jun Wang ◽  
He Peng Gao
Keyword(s):  
Personal Computer ◽  
Rotating Machinery ◽  
Point Method ◽  
Measuring System ◽  
Harmonic Suppression ◽  
Construction Site ◽  
Software Module ◽  
Accuracy Measurement ◽  
Sensor Arrangement ◽  
On Line

In order to measure the rotating machinery fault quickly and conveniently at a construction site, a new measuring system of rotating accuracy of spindle was developed according to three point method. With summarizing the principle of error separation technique based on three point method, the function, hardware construction and software module of this module were introduced. The problem of harmonic suppression is relieved by changing the sensor arrangement. The measuring system mainly consists of three eddy current sensors ,a acquisition card and a personal computer. After a few parameters were inputted, the rotation accuracy of calculation and display could be carried out automatically on line at a construction site.

Block Thickness Measurement of Using the Structured Light Vision

2018 ◽  
Vol 33 (01) ◽  
pp. 1955001 ◽  
Author(s):  
Fenghui Lian ◽  
Qingchang Tan ◽  
Siyuan Liu
Keyword(s):  
Machine Vision ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Thickness Measurement ◽  
Base Plane ◽  
Vision Measurement ◽  
Measurement Results ◽  
Measurement Equations ◽  
Structured Light Vision ◽  
Measuring Base

A method for measuring block thicknesses is proposed by the machine vision measurement. Equations of the measuring base plane and the light plane are formed by calibration. Then, the equation of the light strip image, that is, the image of the intersection between the base plane and light one, is established by the projection relation. Equation of the image of the light strip on the measured plane can be determined by the fitting. Since the light strip on the measuring base plane is parallel to one on the measured plane, the thickness of the measuring block is measured by using the two equations. The experiment evaluates the measurement accuracy of the measurement method and analyzes the influence of some factors on the measurement results.

Study on the Measuring and Positioning of the Rim Valve Hole Based on Machine Vision

2014 ◽  
Vol 711 ◽  
pp. 333-337 ◽  
Author(s):  
Fang Wang ◽  
Chao Kun Ma ◽  
Shan Qiang Dai ◽  
Chang Chun Li
Keyword(s):  
Image Processing ◽  
Machine Vision ◽  
Measurement Method ◽  
Ccd Camera ◽  
Servo Motor ◽  
Processing Characteristic ◽  
Linear Ccd ◽  
Hole Position ◽  
And Control

The author has designed a visual workbench to realize that the rim can rotate with the workbench. Meanwhile, the linear CCD camera records the rim’s circumference. The paper has explored the measurement method of getting the rim valve hole position using machine vision. The system can calculate the position of rim-hole and control the servo motor by image processing, characteristic recognizing and measuring to locate the position of wheel-hole automatically. And the paper has verified the accuracy of the method by experiments.

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