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GB2294375A - Position monitoring system - Google Patents

Position monitoring system Download PDF

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Publication number
GB2294375A
GB2294375A GB9421295A GB9421295A GB2294375A GB 2294375 A GB2294375 A GB 2294375A GB 9421295 A GB9421295 A GB 9421295A GB 9421295 A GB9421295 A GB 9421295A GB 2294375 A GB2294375 A GB 2294375A
Authority
GB
United Kingdom
Prior art keywords
data
microwave
radio
portable unit
units
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.)
Granted
Application number
GB9421295A
Other versions
GB2294375B (en
GB9421295D0 (en
Inventor
Nigel Geoffry Wood
James Thomas Twigg
Paul Keith Cullen
Ian Donald Clemon
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.)
Q M SYSTEMS Ltd
Original Assignee
Q M SYSTEMS Ltd
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 Q M SYSTEMS Ltd filed Critical Q M SYSTEMS Ltd
Priority to GB9421295A priority Critical patent/GB2294375B/en
Publication of GB9421295D0 publication Critical patent/GB9421295D0/en
Publication of GB2294375A publication Critical patent/GB2294375A/en
Application granted granted Critical
Publication of GB2294375B publication Critical patent/GB2294375B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/68—Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information
    • 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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08—Systems for determining direction or position line
    • 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0018—Transmission from mobile station to base station
    • 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/10—Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements, e.g. omega or decca systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

A body is tracked using a network of fixed transmitters and a receiver on the body. Each transmitter illuminates a part A1, B1, A2, B2... of the area to be monitored with microwaves generated by a pulsed Gunn oscillator, digitally encoded with distinctive data, and transmitted by a horn antenna. The receiver, which is also uniquely coded, receives the radiation via an open wave guide and detector diode, determines its position from the data received, and transmits information to a control unit by radio; two-way communication is possible. Variations in data give direction of movement. <IMAGE>

Description

POSITION MONITORING SYSTEM The invention is a system that comprises of a number of digital microwave transmitters and receivers. The microwave transmitters send microwave information to receiving units. The receiver gains positional and directional information from groups of narrow and clearly defined microwave beams. Each transmitting device is programmed with a unique digital code. The beam shape is optimised for transmission of data in a defined space such as a passageway.
More than one microwave beam is controlled to provide data to determine directional information through a defined space (e.g.) the plan views of the passageways per Diagrams 1 to 4. A further specific use is for indicating entry or exit of a passage, room, external area, etc. and the direction of that entry or exit.
Digital data is created by a pulsing gunn oscillator with suitable filter and horn geometry (Diagram 5). Two or more narrow well defined beams of microwave data are produced.
Beams side by side within 1/2 metre are driven such that they do not interfere with each other.
Information is received by a microwave receiving unit by means of an open wave guide with a wave detector diode system (Diagram 5). Information is manipulated and stored by a microprocessor system and is accessible for standard transmission or manipulation through computer / data acquisition systems. The system is of value in applications requiring control and monitoring of movement. Some advantages of the invention are that microwave penetrates material allowing the receiving system to be mounted under cover for protection and I or convenience, that microwave does not suffer from atmospheric/radio interference and that the system provides a high definition of position and direction.

Claims (9)

CLAIMS:
1. A tracking system comprising a network of fixed units that transmit digitally coded microwave data by means of a pulsing gun oscillator with suitable filter and horn geometry to portable microwave receivers that receive by means of an open wave guide with a wave detector diode system and store the received message. The portable unit is a microprocessor-controlled data acquisition unit that is itself uniquely coded and stores a sequence of microwave signals. The portable unit regularly transmits data and may be stimulated to transmit such data to a control via a radio system.
2. A system as claimed in claim 1 that transmits and derives maintenance information concerning the operational integrity of units in the system.
3. A system as claimed in claims 1 or 2 that indicates movement from one control zone to another.
4. A system as claimed in claims 1, 2 or 3 that incorporates within the radio system the ability to tolerate multiple signal paths for the tracking data such that the radio receivers may be used to overcome blank spots in radio transmission (eg) such as caused by dense building structures.
5. A system as claimed in claims 1, 2, 3 or 4 that allows microwave transmitters to be synchronised and therefore placed in close proximity to for example form "curtains" to cover a line.
6. A system as claimed in claims 1, 2, 3, 4, or 5 that includes radio receivers wired in clusters round a sub-system of collector units that prioritise and manage data.
7. A system as claimed in claims 1, 2, 3, 4, 5 or 6 that allows two-way communication for example by means of a digital display on the portable unit.
8. A system as claimed in claims 1, 2, 3, 4, 5, 6 or 7 that incorporates a distributed information system such that information available at the central control is also available, possibly in modified form, at remote stations.
9. A system as claimed in claims 1, 2, 3, 4, 5, 6, 7 or 8 that interfaces with other electronic systems such as fire, security, telephone, access and time recording systems.
GB9421295A 1994-10-22 1994-10-22 Position monitoring systems Expired - Fee Related GB2294375B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9421295A GB2294375B (en) 1994-10-22 1994-10-22 Position monitoring systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9421295A GB2294375B (en) 1994-10-22 1994-10-22 Position monitoring systems

Publications (3)

Publication Number Publication Date
GB9421295D0 GB9421295D0 (en) 1994-12-07
GB2294375A true GB2294375A (en) 1996-04-24
GB2294375B GB2294375B (en) 1997-10-29

Family

ID=10763221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9421295A Expired - Fee Related GB2294375B (en) 1994-10-22 1994-10-22 Position monitoring systems

Country Status (1)

Country Link
GB (1) GB2294375B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0930591A1 (en) * 1997-12-18 1999-07-21 Lucent Technologies Inc. Automatically locating individuals utilizing a combination of wireless media
US6236858B1 (en) 1998-06-30 2001-05-22 Avaya Technology Corp. Wireless terminal automatically alerting user upon wireless terminal entering a specified physical location

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002165A1 (en) * 1981-12-16 1983-06-23 Kachwalla, Zain A position indicating system
GB2240895A (en) * 1990-01-16 1991-08-14 Gordon H Matthews System for monitoring the speed of play of a golfer over a golf course
GB2247131A (en) * 1990-08-02 1992-02-19 Wang James June Ming Golf course ranging and direction-finding system using spread spectrum radiolocation techniques
US5250955A (en) * 1992-06-05 1993-10-05 Lockheed Information Services Company State entry beacon system
EP0568824A2 (en) * 1992-04-08 1993-11-10 Us West New Vector Group, Inc. System for marking zones in a cellular service area
GB2274521A (en) * 1993-01-11 1994-07-27 Hitachi Ltd Production control system
WO1995000821A1 (en) * 1993-06-25 1995-01-05 Omniplex, Inc. Determination of location using time-synchronized cell site transmissions

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002165A1 (en) * 1981-12-16 1983-06-23 Kachwalla, Zain A position indicating system
GB2240895A (en) * 1990-01-16 1991-08-14 Gordon H Matthews System for monitoring the speed of play of a golfer over a golf course
GB2247131A (en) * 1990-08-02 1992-02-19 Wang James June Ming Golf course ranging and direction-finding system using spread spectrum radiolocation techniques
EP0568824A2 (en) * 1992-04-08 1993-11-10 Us West New Vector Group, Inc. System for marking zones in a cellular service area
US5250955A (en) * 1992-06-05 1993-10-05 Lockheed Information Services Company State entry beacon system
GB2274521A (en) * 1993-01-11 1994-07-27 Hitachi Ltd Production control system
WO1995000821A1 (en) * 1993-06-25 1995-01-05 Omniplex, Inc. Determination of location using time-synchronized cell site transmissions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0930591A1 (en) * 1997-12-18 1999-07-21 Lucent Technologies Inc. Automatically locating individuals utilizing a combination of wireless media
US6236858B1 (en) 1998-06-30 2001-05-22 Avaya Technology Corp. Wireless terminal automatically alerting user upon wireless terminal entering a specified physical location

Also Published As

Publication number Publication date
GB2294375B (en) 1997-10-29
GB9421295D0 (en) 1994-12-07

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20081022