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RFID toner bottle tag tracking based on dispense motor timing

IP.com Disclosure Number: IPCOM000237512D
Publication Date: 2014-Jun-19
Document File: 2 page(s) / 52K

Publishing Venue

The IP.com Prior Art Database

Abstract

Toner bottles in a xerographic printer or Multifunction device (MFD) can be fitted with a Radio Frequency Identification Tag to track usage in the machine. A coupler chip is placed in the machine to read the data on the toner bottle’s RFID tag. The system needs to be able to access the tag each when it is in proximity of the coupler chip. Currently the system doesn’t know the position of the tag so the system needs to continuously poll for it – this can use a lot of CPU and also create excess emissions since the RF carrier signal needs to be present for this to happen. This idea proposes an algorithmic approach to keep track of the rotation of a toner bottle in order to only poll, read and write to the RFID tag when it is in the proximity of the reader. The algorithm uses the geometry of the toner bottle and the speed of rotation to predict when the carrier signal needs to be activated.

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RFID toner bottle tag tracking based on dispense motor timing

Toner bottles in a xerographic printer or Multifunction device (MFD) can be fitted with a Radio Frequency Identification Tag to track usage in the machine.  A coupler chip is placed in the machine to read the data on the toner bottle’s RFID tag. The system needs to be able to access the tag each when it is in proximity of the coupler chip.  Currently the system doesn’t know the position of the tag so the system needs to continuously poll for it – this can use a lot of CPU and also create excess emissions since the RF carrier signal needs to be present for this to happen.  This idea proposes an algorithmic approach to keep track of the rotation of a toner bottle in order to only poll, read and write to the RFID tag when it is in the proximity of the reader. The algorithm uses the geometry of the toner bottle and the speed of rotation to predict when the carrier signal needs to be activated.

Assuming continuous dispense, the algorithm is as follows:

Time of last access = Tacc

Diameter of bottle = d

RPS = RPM / 60

Trev = d * PI / RPS

Next access time = Tacc + Trev

Assuming non continuous dispense, the algorithm is as follows:

Motor distance travelled per ms = d * PI * RPS / 1000

Each time the dispense motor is turned on a distance is accumulated and the system is notified when the next revolution of the bottle is complete (when the tag should be in range for another scan).

A coefficient (Trevcoeff) related t...