WO2000005674A3 - Communicating with radio frequency identification tags within shaped electromagnetic fields - Google Patents

Communicating with radio frequency identification tags within shaped electromagnetic fields Download PDF

Info

Publication number
WO2000005674A3
WO2000005674A3 PCT/US1999/016451 US9916451W WO0005674A3 WO 2000005674 A3 WO2000005674 A3 WO 2000005674A3 US 9916451 W US9916451 W US 9916451W WO 0005674 A3 WO0005674 A3 WO 0005674A3
Authority
WO
WIPO (PCT)
Prior art keywords
emitter
enclosure
communicating
tag
radio frequency
Prior art date
Application number
PCT/US1999/016451
Other languages
French (fr)
Other versions
WO2000005674A9 (en
WO2000005674A2 (en
Inventor
Venkata S Kodukula
Dah-Weih Duan
Philip Murphy
Original Assignee
Intermec Ip Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intermec Ip Corp filed Critical Intermec Ip Corp
Publication of WO2000005674A2 publication Critical patent/WO2000005674A2/en
Publication of WO2000005674A9 publication Critical patent/WO2000005674A9/en
Publication of WO2000005674A3 publication Critical patent/WO2000005674A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D43/00—Automatic clutches
    • F16D43/02—Automatic clutches actuated entirely mechanically
    • F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
    • F16D43/14—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members
    • F16D43/16—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members with clutching members having interengaging parts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/24—Power-actuated vehicle locks characterised by constructional features of the actuator or the power transmission
    • E05B81/25—Actuators mounted separately from the lock and controlling the lock functions through mechanical connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B2047/0014—Constructional features of actuators or power transmissions therefor
    • E05B2047/0018—Details of actuator transmissions
    • E05B2047/0026—Clutches, couplings or braking arrangements
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B2047/0014—Constructional features of actuators or power transmissions therefor
    • E05B2047/0018—Details of actuator transmissions
    • E05B2047/0026—Clutches, couplings or braking arrangements
    • E05B2047/0031—Clutches, couplings or braking arrangements of the elastic type
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/24—Power-actuated vehicle locks characterised by constructional features of the actuator or the power transmission
    • E05B81/32—Details of the actuator transmission
    • E05B81/34—Details of the actuator transmission of geared transmissions
    • E05B81/36—Geared sectors, e.g. fan-shaped gears
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/24—Power-actuated vehicle locks characterised by constructional features of the actuator or the power transmission
    • E05B81/32—Details of the actuator transmission
    • E05B81/46—Clutches

Abstract

An RF base station system includes an RF signal generator coupled to an RF emitter (106, 122), such as an antenna and an RF-reflective surface or field shaper (108) arranged to reflect RF signals emanating from the RF emitter to increase the effective tag reading volume of the base station system. In an illustrative embodiment, a plurality of reflective surfaces may be arranged to form the walls of a tunnel-like enclosure (108) to confine RF energy from the RF emitter (106, 122) to a tag-reading volume within the enclosure. In addition to confining the RF energy, the geometry of the reflective surfaces, the carrier frequency of the RF signal, and placement of the RF emitter (106, 122) may be chosen so that the probability is increased that the RF field strength within the enclosure (108), or a portion thereof, meets an RF tag's reading threshold requirement. In particular, the enclosure geometry, the carrier frequency of the RF signal, and placement of the RF emitter (106, 122) may be chosen so that multiple RF propagation modes are established within the cavity formed by the enclosure.
PCT/US1999/016451 1998-07-24 1999-07-23 Communicating with radio frequency identification tags within shaped electromagnetic fields WO2000005674A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12230098A 1998-07-24 1998-07-24
US09/122,300 1998-07-24

Publications (3)

Publication Number Publication Date
WO2000005674A2 WO2000005674A2 (en) 2000-02-03
WO2000005674A9 WO2000005674A9 (en) 2000-02-24
WO2000005674A3 true WO2000005674A3 (en) 2000-07-27

Family

ID=22401897

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/016451 WO2000005674A2 (en) 1998-07-24 1999-07-23 Communicating with radio frequency identification tags within shaped electromagnetic fields

Country Status (1)

Country Link
WO (1) WO2000005674A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7106196B2 (en) 2001-07-12 2006-09-12 Intermec Ip Corp Method and apparatus for configuring the read-range of an RFID label or tag
EP1601994A1 (en) * 2003-02-18 2005-12-07 Tagsys SA System for minimizing coupling nulls within an electromagnetic field
US7304573B2 (en) 2003-11-26 2007-12-04 Ge Medical Systems, Inc Method and system for determining hardware configuration of medical equipment using RF tags
GB0611983D0 (en) 2006-06-16 2006-07-26 Qinetiq Ltd Electromagnetic radiation decoupler
US9830486B2 (en) * 2014-06-05 2017-11-28 Avery Dennison Retail Information Services, Llc RFID variable aperture read chamber crossfire
US11714975B2 (en) 2014-10-28 2023-08-01 Avery Dennison Retail Information Services Llc High density read chambers for scanning and encoding RFID tagged items
US9922218B2 (en) 2015-06-10 2018-03-20 Avery Dennison Retail Information Services, Llc RFID isolation tunnel with dynamic power indexing
IL245947A0 (en) * 2016-05-31 2016-08-31 Mul T Lock Technologies Ltd Clutch for actuator-driven lock assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849633A (en) * 1972-01-04 1974-11-19 Westinghouse Electric Corp Object identifying apparatus
US4063229A (en) * 1967-03-30 1977-12-13 Sensormatic Electronics Corporation Article surveillance
EP0512543A2 (en) * 1991-05-07 1992-11-11 Nippondenso Co., Ltd. Electronic tag
US5260690A (en) * 1992-07-02 1993-11-09 Minnesota Mining And Manufacturing Company Article removal control system
GB2305826A (en) * 1996-02-23 1997-04-16 Telesensomatic Gmbh Electronic tag reading/writing using antennae embedded in curtain through whichtagged object passes
US5726630A (en) * 1992-11-18 1998-03-10 British Technology Group Limited Detection of multiple articles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063229A (en) * 1967-03-30 1977-12-13 Sensormatic Electronics Corporation Article surveillance
US3849633A (en) * 1972-01-04 1974-11-19 Westinghouse Electric Corp Object identifying apparatus
EP0512543A2 (en) * 1991-05-07 1992-11-11 Nippondenso Co., Ltd. Electronic tag
US5260690A (en) * 1992-07-02 1993-11-09 Minnesota Mining And Manufacturing Company Article removal control system
US5726630A (en) * 1992-11-18 1998-03-10 British Technology Group Limited Detection of multiple articles
GB2305826A (en) * 1996-02-23 1997-04-16 Telesensomatic Gmbh Electronic tag reading/writing using antennae embedded in curtain through whichtagged object passes

Also Published As

Publication number Publication date
WO2000005674A9 (en) 2000-02-24
WO2000005674A2 (en) 2000-02-03

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