Posted in | Sensors General

DMC and QR Code Reading with the EyeSens Vision Sensors

Nowadays the demands on quality and processing speed are very high. And on the contrary to the last century, a product is not necessarily produced in one place. No matter if pharma, electronic, food or automotive industry, the commodity flows are getting more and more complex and production flows faster and faster.

How important has it become then to keep track of a product. Commodity flows have to be transparent, which means traceable, for not running the risk of health and economic damages. The traceability is accomplished by coding the product and is an obligation to the customer.

The product has to have an explicit identification. This is accomplished through labeling, RFID chips or full matter marking. Therefore a product is noninterchangeable. And full matter marking means, that the code is edged directly into the surface of the product. Either through ink-jet, laser or grout injection needle.

The EyeSens DMC is a compact vision sensor, with integrated lens and illumination. There are three different resolutions for the vision sensor: 736 x 480, 1024 x 768 and 1280 x 1024 pixel. The EyeSens has a 1/3“ CMOS sensor and its interfaces are Ethernet, RS232 and optionally also RS422. The lens can be in 6, 12 or 25 mm.

The EyeSens DMC can also be equipped with the QR-code reader command. Therefore the vision sensor can read both, DMC and QR code.

The codes are evaluated by the EyeVision image processing software. The drag-and-drop programming does not require programming skills and the code reader command is easy to adjust in the graphical user interface. There is also the possibility of the process mode, so the user design their own interface.

There are two possibilities concerning the 2D codes: for industrial environments the DMC (Data Matrix Code) is most often used. A DMC contains a high packing density and can be applied to any component part. It can also be read in cases where the code is partly damaged.

The QR-code on the contrary is most often used for marketing and media areas. With the QR-code information is automatically found and read. It is too readable if damaged, but it cannot be applied with grout injection needles.

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