Implementing circularity measurements in industry 4.0-based manufacturing metrology using MQTT protocol and Open CV:...

Area of Science:

• Manufacturing Metrology
• Industry 4.0
• Internet of Things (IoT)

Background:

• Manufacturing metrology is essential for machine inspection in Industry 4.0.
• Internet of Things (IoT) enables device communication via cloud and local servers.
• Accurate inspection of circular characteristics is vital for various industrial applications.

Purpose of the Study:

• To investigate the MQTT protocol's role in enhancing data transmission for circularity measurements.
• To compare the performance of a non-contact vision system with a contact-based Coordinate Measuring Machine (CMM).

Main Methods:

• Utilized MQTT protocol for data transmission between cloud servers and round-hole data sources.
• Employed Open CV and image processing techniques (Hough Transform, Edge Detection, Contour Analysis) for circular feature analysis.
• Conducted a comparative experiment between a non-contact 3SMVI system and a contact-based CMM system.

Main Results:

• The study demonstrated the feasibility of using MQTT and Open CV for circularity measurement data transmission.
• Experimental results showed a variation of 5 to 9.6 micrometers between the non-contact 3SMVI and contact-based CMM systems.
• High-resolution cameras and optimal lighting conditions are suggested for improved precision.

Conclusions:

• The MQTT protocol and Open CV offer an efficient method for transmitting circularity measurement data.
• Non-contact vision inspection systems present a viable alternative to traditional CMM for roundness evaluation.
• Further research with enhanced imaging technology can improve the precision of non-contact metrology.