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When Quality Really Counts



testing and inspection equipment suppliers say their products are more valuable than ever in these troubling economic times




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AccuSentry offers line scan camera technology for the inspection of baby diapers, adult incontinence products and training pants. As shown in this image, an area camera captures the image of a region while a line scan camera captures one narrow segment of a product and builds up the image as the product moves across the camera. An Encoder is used to provide line trigger signals to the line scan camera. The trigger signals are periodically spaced to coincide with the amount of web that has moved across the camera’s one-pixel field of view. Line scan imaging uses a single line of pixels to build up seamless two-dimensional images of moving products.

For about five years, AccuSentry has been using the line scan technology to inspect continuously moving webs. In 2008, AccuSentry successfully adopted the technology for the inspection of baby diapers, adult incontinence and training pants.

The advantages of line scan technology are smaller footprint, more uniform lighting and the ability to inspect through a very tight space. The disadvantages are additional complexity and costs. To capitalize on advantages, AccuSentry has successfully integrated the line scan and area camera technology into a single system. Within a single system, the area cameras can be used to inspect smaller components that do not require a large footprint and the line scan cameras can be used to inspect production sections  with a larger footprint.