12-12-2012, 01:58 PM
BAR CODE TECHNOLOGY
BAR CODE.pptx (Size: 856.68 KB / Downloads: 31)
It is an automatic identification technology
Bar code is a predefined format of dark bars and white spaces
Structured to contain a specific piece of information
It allows real-time data to be collected accurately and rapidly
Combination of barcode technology with computer and application software improves performance, productivity and profitability
BAR CODE SCANNERS
A device used to extract information optically from a Bar Code
Bar Code symbol consists of series of vertical dark bars separated by light spaces
When illuminated reflected light is detected by electro optical sensor
The intensity of reflected light from the dark bars is less than that of spaces
SCANNERS …
Reflected light is converted into electrical voltage signals
Analog voltages are digitized into raw data
The decoder converts this data into the character data representation of the symbol’s code
TYPES OF SCANNERS (READERS)
CONTACT READERS
Must touch or come in close proximity of symbol
Good where the label cannot be placed in an easy-to-view position
Normally hand-held/stationary units
Common type is pen/wand reader
A high-density resolution wand used to read a low-density symbol might see an ink spot as bar or an ink void as a space
BENEFITS OF BAR CODING
REPRESENT UNIQUE IDENTITY OF A PRODUCT
ACCURACY OF DATA INPUT (ERROR FREE)
AID EFFECTIVE MANAGEMENT OF RESOURCES AND INVENTORIES
LABOUR SAVINGS BY AVOIDING MANUAL SYSTEM