A flexible industrial robot with the decision-making capability of a human operator has been developed by robotics experts at the Coventry-based Manufacturing Technology Centre.
Using a combination of machine learning and visual recognition, the robot can be taught to make assembly decisions based on the components put in front of it, in a breakthrough development which could save manufacturers the costs of expensive fixed tooling.
Now the MTC has developed a flexible automation demonstrator to show manufacturers how the robotics can be used to create a low cost, reactive assembly system. The demonstrator mimics a typical electronic assembly using multiple components.
Most automation technology in industry is specifically programmed to a given task and is unable to accept input variations. Changing the process can require major investment in fixturing and reprogramming. The MTC system is trained to recognise components and assembly variables and retrieve solutions from its database. It combines a robot operating system with a collaborative robot and low-cost vision sensors.
MTC senior research engineer Mark Robson said, "Giving robots the decision-making capability of a human operator can dramatically improve their productivity and flexibility in variable conditions. Our demonstrator project shows how machine learning can be applied to achieve this."
He added, "This work has shown that deep learning-based vision can provide robots with a robust ability to find and work with objects. The MTC has demonstrated methods to overcome the challenges in translating this ability into the physical domain of robotics which will enable the use of other machine-learning algorithms in industrial solutions."
In trials the MTC's system returned a 99 per cent successful detection rate and demonstrated that it was possible to swap the input tray and change the component mix with little effect on performance.
The MTC's chief automation officer, Mike Wilson, said, "We now have a blueprint for developing and implementing intelligent vision systems to industrial problems in an effective way, opening up potential applications in human-robot collaboration. We have eliminated the need for part fixtures as this system can adapt to new layouts without reprogramming. Completely traceable decision-making allows errors to be addressed quickly and effectively, and the system can be trained to apply to any new assembly process."
The MTC was founded by the University of Birmingham, Loughborough University, the University of Nottingham and TWI Ltd. The MTC’s industrial members include some of the UK’s major global manufacturers.
The MTC aims to provide a competitive environment to bridge the gap between university-based research and the development of innovative manufacturing solutions, in line with the Government’s manufacturing strategy. The MTC is part of the High Value Manufacturing Catapult, supported by Innovate UK.