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SixthSence:RFID -based Enterprise Intelligence. HELEN. Outline. RFID Equipment RFID PERFORMANCE MEASUREMENT Algorithms Evaluation Application. RFID Equipment. The Impinj UHF Gen 2 Speedway Reader Impinj's Monza RFID tag. RFID PERFORMANCE MEASUREMENT.

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SixthSence:RFID -based Enterprise Intelligence

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SixthSence:RFID-based Enterprise Intelligence

HELEN


Outline

  • RFID Equipment

  • RFID PERFORMANCE MEASUREMENT

  • Algorithms

  • Evaluation

  • Application


RFID Equipment

  • The Impinj UHF Gen 2 Speedway Reader

  • Impinj's Monza RFID tag


RFID PERFORMANCE MEASUREMENT


Effect of displacement from antenna axis on read range

  • Tag move away from the antenna axis the read range decreases


Effect of distance from antenna on allowed displacement from axis

  • The tag moves farther from antenna , the allowed displacement from

    axis also increases

    proportionally


Read range for tags on object carried by a person


Algorithms

  • Person-object differentiation

  • Object ownership

  • Zone identification

  • Person identification


Tag belong to person or object?

Object move only when carried by a person

transition=?

Define a suitable threshold person


Problem?

  • An object belong to an active person might well exhibit far more movement than a sedentary

    >


Co-movement

  • The movement of a tag is compare with the movement of other tags at the same point


tag1

m1=1 C1=1

Tag0

tag1

Tag2,m2=2,

C2=2

tag2


Object ownership

borrow

confuse


Co-presence

  • For each object , we simply keep track of the amount time .


Zone identification

  • Individual workspace

  • Shared workspace

  • Reserved shared workspace

  • Common area


Person identification

Logging

  • Tag id of person person identity

1

2

1

1

1


Object interaction

  • If environment is stable , the RSSI from the tag would also be stable

  • If object is picked up , this would change its distance and its orientation ,thereby causing the RSSI of its tag change

  • Differ at least 10 dBm interacted


Evaluation movement detection

  • ……………

    100

tag

tag


Object interaction detection

Sample every 200 ms

4 second window 20 samples6-7 times

antenna

antenna


Stability


Test bed deployment

  • …………..

  • 1 2 3 …………… 20

  • x 20 10% go x 4 (pick at random)


Movement with walk length of 10


Movement with walk length of 2


Application

  • Misplaced object alert

  • Annotated video

  • Automatic conference room booking

  • Semi-automated image catalog


  • Login