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Manufacturing Technology Insights | Thursday, December 09, 2021
Machine vision systems are made up of a number of components, each of which makes a distinct contribution to the overall system. It has several obvious advantages for manufacturers and production lines.
Fremont, CA: Machine vision systems, also known as automated vision systems or vision inspection systems, are made up of many components found in nearly all systems. Although each of these components have their own function and may be found in various other systems, they each play a unique role in a machine vision system when they work together. Machine vision systems can be made up of discrete components or combined into a single unit, such as a smart camera that integrates the operations of multiple components into a single container. The success of the machine vision system is also dependent on the type of parts being evaluated, regardless of whether a discrete or integrated system is used. The better the consistency of part placement and orientation, the better the system's performance will be.
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A machine vision system comprises of the following elements:
Sensor
Machine vision systems use sensors to catch light from the optical system and turn it into a digital image. Sensors capture light using CMOS or CCD technology and convert it into a group of pixels that show the existence of light in various places of the original portion being studied. The resolution of a sensor is an indication of the number of pixels accessible in a digital image. Higher-resolution sensors can produce images with more pixels, resulting in improved image quality and the capacity to resolve finer details.
Lighting
When choosing lighting for a machine vision system, keep in mind that the goal is to maximize contrast for whatever features are being measured or observed while limiting contrast for any other features of the part. By changing these basic settings, a machine vision system's capacity to consistently identify and measure the part feature(s) being monitored can be significantly improved.
Vision processing
The machine vision system's vision processing portion employs software to perform particular operations on the data from the digital image, which are subsequently utilized to evaluate the part under observation. These evaluations are pre-programmed conditions that specify the part's acceptance and rejection criteria.
Optical system
A lens or a camera, which blends the lens with other elements such as the sensor, are common optical components in a machine vision system. The field of view, or the two-dimensional area over which observations can be made, is determined by the lens choice. The lens will also decide the depth of focus and focal point, both of which will affect the system's capacity to observe details on the parts it is processing.
Communications
The communications protocol is the final element in the machine vision system after the vision processing element has completed its tasks. The goal of this component is to give a useful output in a defined format that can be used to drive other components in the manufacturing process using the vision processing system's output.
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