Bar code scanner
From YourAssociationWiki
Views
- "Scanner" redirects here. For other uses, see Scanner (disambiguation).
A bar code scanner captures the image of a bar code using sensors.
Contents |
Technologies
There are several technologies used for bar code scanners:
- Laser scanners use a single spot of light to sweep across the bar code in a linear fashion.
- CCD scanners use an LED array with thousands of light detectors; the entire bar code image is captured and then transmitted.[1]
Types of Scanners
Fixed position or automatic scanners
Fixed position scanners are in a fixed position and read bar codes as they go by on a conveyor.
- Countertop scanners sit on a desk or countertop and are generally designed to detect the presence of nearby objects, turn on automatically, and capture the bar code.
- In-counter scanners are often used in grocery stores. The scanner is mounted below the surface of the counter and aims an interlocking laser beam pattern up through a glass faceplate.
- Above-belt scanners look down from above a conveyor and read bar codes on moving containers. They are often used for high-speed package sortation.
- Fixed mount scanners are intended for industrial applications to read bar codes on machinery, parts, or containers. They are generally built into very tough housings and are solidly mounted.[2]
Handheld scanners
Handheld scanners,such as wands, are portable and may be carried from place to place, as in a warehouse.
Interfaces
There are a number of scanner interfaces commonly used for bar code scanning:
- Keyboard wedge scanners attach to a computer through a keyboard.
- Serial port / USB scanners attach to a computer directly through a USB or serial port.
- Short-range RF scanners are wireless handheld scanners that use RF signals to communicate.
- Portable batch scanners are handheld scanners with a keyboard and display.
- RF wireless systems use a private digital network to communicate.[2]
