Optical Scanner Communications Using Wand Interface
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-04
This article suggests a technique for connecting an optical scanner to a point-of-sale terminal via a wand interface rather than a special- purpose scanner interface. The scanner supplies an idealized pulse stream signal representing a decoded label to the wand interface. A wand interface microprocessor processes this signal as if it originated with a wand rather than the scanner. Point-of-sale terminals typically include wand adapters to permit an analog or digital wand to serve as an input device. The wand adapter accepts signals from the wand, counts pulse widths, and identifies label candidates. Point-of-sale terminals may also include special- purpose scanner adapters.