GB9514409D0 - Location detection - Google Patents

Location detection

Info

Publication number
GB9514409D0
GB9514409D0 GBGB9514409.3A GB9514409A GB9514409D0 GB 9514409 D0 GB9514409 D0 GB 9514409D0 GB 9514409 A GB9514409 A GB 9514409A GB 9514409 D0 GB9514409 D0 GB 9514409D0
Authority
GB
United Kingdom
Prior art keywords
location detection
location
detection
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GBGB9514409.3A
Other versions
GB2291303A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9514409D0 publication Critical patent/GB9514409D0/en
Publication of GB2291303A publication Critical patent/GB2291303A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
    • G08B21/0241—Data exchange details, e.g. data protocol
    • G08B21/0247—System arrangements wherein the alarm criteria uses signal strength
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
    • G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14—Systems for determining direction or deviation from predetermined direction
    • G01S3/28—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics
    • G01S3/32—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics derived from different combinations of signals from separate antennas, e.g. comparing sum with difference
    • G01S3/34—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics derived from different combinations of signals from separate antennas, e.g. comparing sum with difference the separate antennas comprising one directional antenna and one non-directional antenna, e.g. combination of loop and open antennas producing a reversed cardioid directivity characteristic
GB9514409A 1994-07-14 1995-07-14 Relative position detection Withdrawn GB2291303A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9414256A GB9414256D0 (en) 1994-07-14 1994-07-14 Range detection

Publications (2)

Publication Number Publication Date
GB9514409D0 true GB9514409D0 (en) 1995-09-13
GB2291303A GB2291303A (en) 1996-01-17

Family

ID=10758350

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9414256A Pending GB9414256D0 (en) 1994-07-14 1994-07-14 Range detection
GB9514409A Withdrawn GB2291303A (en) 1994-07-14 1995-07-14 Relative position detection

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9414256A Pending GB9414256D0 (en) 1994-07-14 1994-07-14 Range detection

Country Status (1)

Country Link
GB (2) GB9414256D0 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2315898A (en) * 1996-07-31 1998-02-11 Rusty Maguire Vicinity monitoring system
GB2326549A (en) * 1997-05-08 1998-12-23 Rajab Ali Zafari Child tracker
ITGE970058A1 (en) * 1997-07-09 1999-01-11 Jgor Arata ELECTRONIC ANTI-LOSS AND / OR ANTI-THEFT DEVICE.
DE19927319A1 (en) * 1999-06-15 2000-12-21 Mannesmann Vdo Ag Method for determining the distance between two devices of an identification system
US6512457B2 (en) 1999-11-15 2003-01-28 Hector Irizarry Monitoring device adapted for use with an electronic article surveillance system
FR2825158B1 (en) * 2001-05-23 2003-08-15 Dominique Marquis ASSISTANCE EQUIPMENT FOR LOCATING A MOBILE OBJECT SUCH AS A MISSING OR MISSING ANIMAL
EP1387182B1 (en) * 2002-07-29 2010-05-05 Nippon Telegraph and Telephone Corporation Locating system and method for determining position of objects
GB2399440A (en) * 2003-03-10 2004-09-15 Paul Sleeman Proximity alarm
GB2406422A (en) * 2003-09-23 2005-03-30 Jehan Peter Fernando Out of range tagging device
GB2472192A (en) * 2009-07-27 2011-02-02 Ceri Phillip Stagg A system for identifying lost pets

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1233538A (en) * 1967-06-20 1971-05-26
FR1559030A (en) * 1968-01-02 1969-03-07
GB1368466A (en) * 1972-03-06 1974-09-25 Marconi Co Ltd Automatic radio direction finders
US4654664A (en) * 1985-05-20 1987-03-31 Rockwell International Corporation Electronic null-seeking goniometer for ADF
US4724442A (en) * 1986-05-29 1988-02-09 E-Systems, Inc. Method and apparatus for loop direction finding with no ambiguity

Also Published As

Publication number Publication date
GB2291303A (en) 1996-01-17
GB9414256D0 (en) 1994-08-31

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)