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Copy of Barcodes and Barcode Scanners
Transcript of Copy of Barcodes and Barcode Scanners
The first item was...
A 10 pack of wriggley's Fruit Gum
The technology of barcodes and barcode scanners both depend heavly on the developments in laser or light technology, as well as advancements in software. Types of Barcodes UPC Code 39 A varitation of UPC-a which allows for a more compact barcode by eliminating extra zeros to create an 8 digit code from a 12 digit UPC-A. The most common and well known bar code symbology. Doesn't contain a check digit, but is considered to be self-checking because single e error can't generate another valid character 128 Alphanumeric (sonsisting of or using both letters and numerals (cc) photo by theaucitron on Flickr (cc) photo by theaucitron on Flickr Used in:
Mostly used by production inductries Code 128 Is a high density barcode symbology Used in:
wide world shipping and packing
Inventory Control Capable of encoding 2 numbers into one character width (known as double density) which significantly reduces the amount of space the abrcode occupies
UPC-A UPC-E Found on books, magazines, newspapers Encodes 11 digits of numeric (0 to 9) message data along with a trailing check digit, for a total of 12 digits of bar code data Contains 4 sections:
1. Numer system
2. Manufacture code
3. Product Code
4. Check Digit Used for postal, retail, Inventory Control UPC-A UPC-A 1D 2D QR Code Usually stores addresses adn URL's which may appear in magazines, signs, on buses, business cards (cc) photo by theaucitron on Flickr - QR (quick response) -> Barcode allows itself to be decoded at high speeds Initially was used for tracking parts in vechicle manufacturing
Now used much more broadly in commercial tracking applications and convenience orientated applications aimed at mobile phone users. Types of Scanners Distinguished by their form factor (amount of operation manipulation required) and their scanning technologies Wand Scanners Must be wiped across the barcode at a constant rate and at a aprticular angle Least efficient, least expensive, small, durable, not limited by the width of teh barcode Fixed Mount Barcode Scanner reads the barcode as it is passed infront of the scanner Used on conveyer belts, now in supermarkets, security idenification and laboratories Linear Image Scanners More durable than laser scanners, but have a shorter reading distance. Ideal for reading damaged or poorly printed barcodes and reading barcodes under plastic film or covering Laser Barcode Scanners Most popular scanning technology today. Brightness and sharpness of laser scanners offer precisioness as long range or high density Omnidirectional Barcode Scanners Can read a barcode no matter hot it is orientated, speeds up the scanning process, reduces user fatigue Cost:
Wireless - $400
Wired - $100-$200
(price ranges according to density of light) Cost: $200 Cost: $560 to $900 Cost: $139
Cordless with High Density - $2,000
Price will vary for fixed, cordless and density Cost: $450 - $630