Title:
【発明の名称】RFトランスポンダ及びモニターされる対象に関連したパラメータを計測する方法
Document Type and Number:
Japanese Patent JP2002511612
Kind Code:
A
Abstract:
A radio frequency (RF) transponder (200) capable of measuring parameters associated with an object and transmitting data to an external reader/interrogator (106, 400). In use with a pneumatic tire (104), the transponder measures temperature and pressure withinthe tire. The transponder includes circuitry (226) for controlling windows of time (WT and WP) during which real-time temperature and pressure measurements are made, and for storing (236) calibration data, transponder ID number and the like, and for transmitting this information in a data stream (Figure 3C) to the reader/interrogator. An excessive temperature condition may also be sensed (MTMS 218) and included in the data stream. The circuitry of the transponder is preferably implemented on a single IC chip (204), using CMOS technology, with few components external to the IC chip. The transponder is preferably passive, deriving its operating power from an RF signal provided by the exernal reader/interrogator. Data (NT) indicative of temperature and data (NP) indicative of pressure are both transmitted to the reader/interrogator, along with calibration data. A calibration data stored by the transponder and transmitted in the data stream is a slope of NT/NP, or the "ratioed" response of the temperature count divided by the pressure count, which is determined during calibration of the transponder.
Inventors:
Pollack, Richard Stephen
Black, donald lee
Yones, Dale Lee
Brown, Robert Walta
Black, donald lee
Yones, Dale Lee
Brown, Robert Walta
Application Number:
JP2000543308A
Publication Date:
April 16, 2002
Filing Date:
April 14, 1998
Export Citation:
Assignee:
THE GOODYEAR TIRE & RUBBER COMPANY
International Classes:
G08C17/02; B60C23/04; (IPC1-7): G08C17/02; B60C23/00
Attorney, Agent or Firm:
Nobuyuki Kaneda (2 others)