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Auto Identification Systems - An Overview

Auto-Identification and Data Capture (AIDC) refers to methods in which equipment, both hardware and software, automatically reads and recognizes data via bar codes, 2-dimensional codes, RFID, fingerprints, voice prints, retinal prints, etc., without the aid of a person.

Basically, any system that reads and recognizes "data originating from people or objects" is called an ID system.

Bar Code/2-Dimensional Code Applications

Bar codes are attached to the packaging of many foods and daily commodities and widely used in retail sales, distribution, and the logistics industry to allow various forms of automation. As IT continues to advance, 2-dimensional codes are also finding increasing application in response to the needs for larger data volumes and space-saving.

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RFID Applications                                                                                         

RFID is an acronym for Radio Frequency Identification. An RFID System is a wireless ID system that exchanges data by communicating between a "tag" (or Data Carrier), which is attached to an object or carried by a person, and an antenna (or Reader Writer).

Typical examples include non-contact commuter passes for train station gates, and non-contact ski lift passes. In these examples, the commuter pass and ski lift pass serve as tags, and the station and ski lift gates serve as antennas.

Another example which is less obvious is an automatic calculation system in a cafeteria. In this system, a tag is attached to each of the plates and cups, and an antenna is built into the calculation table where the diner places the tray. Such a system makes it possible to automatically display the price of the meal and other information, such as the total calories for the meal.

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