September 3, 2014

              Easy Sorting with Basler racer Cameras

              Basler racer cameras
              A typical application for line scan cameras is sorting of different types of goods.
              Inspection systems - indoor as well as outdoor - equipped with line scan cameras can be used for sorting of a large variety of objects, such as food, waste, mining products, mail, parcels, etc. Typically these objects are moving past a camera system, being scanned continuously as they are carried to their next destination. This requires the camera systems to be located directly in the materials handling area.

              Our Basler racer camera  is a perfect choice for sorting applications. With its portfolio of 2k to 12k cameras, providing up to 80 kHz line rate, nearly all resolution and speed requirements can be fulfilled. The compact housing and low heat generation support multi camera systems at low costs.

              But what are the critical features for cameras in sorting systems?

              Inspection systems with image processing software evaluate the images from the camera and sort the goods into categories using specific algorithms. The more data gathered about the scanned objects, the better the quality of the evaluation results. Therefore the resolution of the cameras must be high enough to generate as much image information as possible, giving reliable classification of the different inspection objects.

              A conveyor belt or similar equipment carries the goods across the camera´s field of view. The speed of these conveyors varies depending on the scanned objects; slow enough to assure their stable position on the belt while optimizing the throughput. Items cannot move uncontrollably or overlap. A typical conveyor speed is around 15-20 meters per minute. Consequently, the corresponding line scan rate of the camera should be around 35-45 kHz.
              To scan the whole width of the conveyor belt, more than one camera might be necessary. The larger the camera´s resolution, the fewer cameras and fewer components (lenses, cables etc.) are needed. The cameras are mounted side by side on a camera bar above the scanned material, as required for the appropriate optical resolution. A small housing and a powerful heat management system are necessary to pack in as many cameras as possible while avoiding the installation of expensive fans or cooling to prevent overheating or signal noise.

              When installing camera systems directly at the conveyor or at the equipment, longer cable lengths are also a major system asset. GigE cameras allow the usage of BUS concepts and support cable lengths up to 100 meters, offering high flexibility. A power range of 12-24V reduces the need for extra components to stabilize the power voltage. Installation is fast and easy with the comprehensive camera installation software provided in the Basler pylon Camera Software Suite, as well as the camera’s compliance with industry standards such as GenICam, GigE Vision, and Camera Link.

              Ask our Basler Sales Team for details on how our racer line scan cameras can meet your application requirements.

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