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Module 4.3
Data Collection, warehouse, mining
Obtaining data to work
Directly
Indirectly
Data Collection
Radio Frequency Identification RFID
Uses radio waves to identify objects by means of tags attached to the objects
Capture data fast and efficient
The Tag
Contains a
Antenna
Circuitry
Microchip
Passive tags: receive all power from reader, start communicating when the tag enters the
electromatic field
Active tags: receive power from small onboard batteries which allow these tags to
communicate over long distances – track items
The reader
Responsible for creating electromagnetic fields that is used by ‘passive’ tags to generate
electricity for themselves
Sends signals on to software for further processing
Advantage in data capture
Read more than one tag as a time
Read tags that are hidden
Interact with data stored on a tag
Use tag to collect and broadcast data about the environment
Read tags at a moving speed
Invisible data capture
Allowing data to be captured for specific purposes and additional data is being captured
Buying with a credit/loyalty card
Completing forms: collect unrelated data to be used for other purposes
Via the NET: social networking websites to produce targeted advertising
E-tags on public transport: directly linked to your identity
Location-Based Data
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