Modares Mechanical Engineering

Modares Mechanical Engineering

Development of a Semi-Intelligent System for Automatic Measurement of Two-Dimensional Profiles of Parts Based on Machine Vision and edge detection algorithm

Document Type : Original Article

Authors
Arian Hosseini
Saeed Khodaygan
Hossein Soroush
Sharif University of Technology
10.48311/mme.2025.96913.0
Abstract
Dimensional metrology ensures that manufactured components meet precise dimensions, shapes, and geometric features. Automatic measurement of mechanical profiles faces challenges such as high costs and the need for skilled operators. In this study, a semi-intelligent automated measurement method based on machine vision was developed to reduce measurement time and minimize human error. Accordingly, a manual vision measurement system was retrofitted and automated. A two-stage algorithm was designed for this purpose. In the first stage, a side-mounted camera automatically detected and localized parts placed on the worktable without manual intervention. In the second step, a measurement path was generated to enable image measurement of the part profile. Next, the collected data from the previous step was reconstructed into a two-dimensional point cloud for dimensional analysis. A Windows-based graphical user interface (GUI) was developed to enhance the system’s usability and overcome the limitations of the original device software. Standard gauges for length, angle, and thread dimensions were used to obtain the 2D profile and check the accuracy of the presented system. Furthermore, profile dimensional measurement of a standard ANSI 40A26 sprocket was carried out to explore the efficiency of the presented algorithm in actual working conditions. The developed system achieved an average measurement accuracy within 10 µm, with an average deviation of 15 µm compared to CMM-based measurements. However, the current system is limited to two-dimensional profile measurements of components. The results confirmed the system’s measurement precision and demonstrated its potential as a cost-effective solution for dimensional inspection
Keywords
Automatic Measurement
Machine Vision
Image Measurement
2D Profile
Subjects
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Modares Mechanical Engineering
Volume 25, Issue 10
October 2025
Pages 635-651