Machine vision and its role in the smart factory
23 May 2017
In industry, machine vision is being incorporated to develop industrial processes further, identify areas of improvement and enable intelligent locomotion in robotics.
Machine vision is an image processing technology that enables automated object scanning within a set field of view. Plant operators can mount cameras on production lines or cells for real-time process control, product inspection and sorting and robot guidance.
The technology enables robots to interpret their visual surroundings, which can allow them to move around independently. Visual information can be used to recognise the environment and make decisions which are not directly programmed.
While a camera does not see in the same way as the human eye, machine vision systems use pattern detection software to examine data and draw conclusions based on prior knowledge.
This technique is useful when inspecting the quality of raw materials and final products for component flaws or defects. For example, if a problem is found, a part can be redirected or the process can be corrected to resolve the issue.
Machine vision can also be used to ensure operations are traceable using identification tags. A camera can read the tags, allowing the information to be used to direct the product or to register which parts are at what stage of the supply chain.
Smart cameras and sensors can digitalise and transfer information, decoding what they capture to remove the need for human interpretation. The machine can then decide whether the information needs to be relayed to a central control system. These are low cost, user-friendly systems that are often a worthwhile option for those looking to streamline automated manufacturing.
Machine vision is central to the idea of the smart factory, which is based upon a self-organised system comprising of a communicating network and an intelligent exchange of information. Acting as the eyes of the factory, image processing systems based on industrial cameras can compute information that was previously achieved by manual testing. This reduces human error and enables robots to react flexibly to information for production control.
Because image processing equipment captures, gathers and exchanges data, it is a key technology for interconnected production processes. This data can be transmitted to the value chain, but also used to trigger intelligent actions.
The technology can be used to examine the state of production machines for wear and tear. This information is effective for maintenance and can alert a plant manager of the need to order a replacement industrial component before it breaks.
With machine vision systems decreasing in size and increasing speed, accuracy and resolution, the popularity of these systems may well grow drastically over the next few years.
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