23-08-2013, 04:33 PM
BAR CODE TECHNOLOGY AND ITS APPLICATION TO LIBRARY SERVICES
BAR CODE TECHNOLOGY.ppt (Size: 1.87 MB / Downloads: 135)
BAR CODE TECHNOLOGY
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
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
BAR CODE TERMINOLOGY
BAR
- The darker, non reflective element of a Bar Code
BI-DIRECTIONAL SYMBOL
- A Bar Code symbol format which permits reading in either direction across the bars and spaces
CHECK DIGIT
- A calculated character included within the Bar Code for error detection
FIXED BEAM SCANNER
- A stationary Bar Code Scanner. The symbol must be moved through the light beam to be read
TERMINOLOGY …
HAND-HELD SCANNER
A scanner held and operated by a human operator
INTER-CHARACTER GAP
The space between the bars or spaces
MOVING BEAM SCANNER
A Bar Code scanner that uses a moving light beam to dynamically scan and decode a Bar Code symbol
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
CONTACT READERS …
A low-resolution wand may not be able to recognise a narrow bar of high-density symbol
Positioned angle of wand to the surface and movement speed across the symbol are key parameters
NON-CONTACT READERS
Reader need not come in contact with symbol
Scan distance may be from 6” to several feet depending upon symbol size and scanner design
Hand-held, fixed beam readers
ADVANTAGES OF BAR CODE IN LIBRARIES
Quick and error free entry of access and membership codes
Ensures total integrity of collected data
No queuing up at check out/check in counters
Avoids piling up of data entry work for counter staff
Aids generation of suitable reminders to delinquent borrowers
Stock verification made easy