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| BML 3D | Features | Principles of Operation | Technical Data |

BML 3D / Principles of Operation

SENSOR FOR STAMP DETECTION
THE AUSTRIAN CONTRIBUTION TO AUTOMATIC LETTER SORTING SYSTEMS

Stamp detection

The scanner emits side light to the bypass letters. This makes the serrations visible which appears as a light/shadow pattern. The scan line is projected by an objective lens on a CCD sensor. The analogue output signal of the CCD is reduced and digitized to a bit stream pattern. This pattern is compared with adjustable reference patterns. At the end of the scan window the decision "stamp detected/rejected" is made and the proper information is putout on the machine interface.

Printed Code detection

Instead of stamps printed codes can be detected too if placed in the postage zone.

Franked impressions

Red ink impressions are detected if an at least 8mm long printed code is part of the franking impression. A blue filter is built in to increase the contrast of red patterns.

Vertical Codes

An optical reflective sensor emitting visible light is located in the front panel of the BML3D. The sensor is scanning the bypass letter point-shaped. The signal obtained from scanning is converted to a digital light/dark pattern. This signal is available at the sensor interface for external data processing. External data processing is done by the PRIM unit equipped with the barcode Software.

 

   | BML 3D | Features | Principles of Operation | Technical Data |

 
 
 
 
     
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