GB2420058A - A radio beacon - Google Patents

A radio beacon Download PDF

Info

Publication number
GB2420058A
GB2420058A GB0522567A GB0522567A GB2420058A GB 2420058 A GB2420058 A GB 2420058A GB 0522567 A GB0522567 A GB 0522567A GB 0522567 A GB0522567 A GB 0522567A GB 2420058 A GB2420058 A GB 2420058A
Authority
GB
United Kingdom
Prior art keywords
signal
beacon
transmit
series
transmission
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
GB0522567A
Other versions
GB0522567D0 (en
GB2420058B (en
Inventor
Ashley Bennett
Craig Duncan
Sixiong Fan
Chris Maddox
Lance May
Vince Todd
Kevan Wilson-Elswood
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.)
STANDARD COMM Pty Ltd
Original Assignee
STANDARD COMM Pty 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 STANDARD COMM Pty Ltd filed Critical STANDARD COMM Pty Ltd
Publication of GB0522567D0 publication Critical patent/GB0522567D0/en
Publication of GB2420058A publication Critical patent/GB2420058A/en
Application granted granted Critical
Publication of GB2420058B publication Critical patent/GB2420058B/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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
    • 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
    • G01S5/0205—Details
    • G01S5/0226—Transmitters
    • 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
    • G01S5/0205—Details
    • G01S5/0226—Transmitters
    • G01S5/0231—Emergency, distress or locator beacons
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/016—Personal emergency signalling and security systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/02—Details
    • H03B5/04—Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
    • H03L1/022—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature
    • H03L1/023—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature by using voltage variable capacitance diodes
    • H03L1/025—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature by using voltage variable capacitance diodes and a memory for digitally storing correction values
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
    • H03L1/022—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature
    • H03L1/027—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature by using frequency conversion means which is variable with temperature, e.g. mixer, frequency divider, pulse add/substract logic circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Transmitters (AREA)

Abstract

The invention concerns a radio beacon for transmitting a distress signal. The beacon includes a signal generator which includes a non-ovenised crystal oscillator to generate a carrier frequency for a transmission signal. A radio frequency transmitter is provided to transmit a series of signal bursts of the transmission signal. A battery power supply is included to supply power to the beacon to transmit the series of signal bursts. Control electronics are provided to substantially prevent the carrier frequency of the transmission signal changing during transmission of each burst.

Description

GB 2420058 A continuation (72) cont Chris Maddox Lance May Vince Todd
Kevan Wilson-Elswood (74) Agent and/or Address for Service: Kilburn & Strode Red Lion Street, LONDON, WC1R4PJ, United Kingdom
GB0522567A 2003-04-08 2004-04-07 A radio beacon Expired - Fee Related GB2420058B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2003901650A AU2003901650A0 (en) 2003-04-08 2003-04-08 A radio beacon
PCT/AU2004/000450 WO2004091090A1 (en) 2003-04-08 2004-04-07 A radio beacon

Publications (3)

Publication Number Publication Date
GB0522567D0 GB0522567D0 (en) 2005-12-14
GB2420058A true GB2420058A (en) 2006-05-10
GB2420058B GB2420058B (en) 2007-04-11

Family

ID=31500692

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0522567A Expired - Fee Related GB2420058B (en) 2003-04-08 2004-04-07 A radio beacon

Country Status (3)

Country Link
AU (1) AU2003901650A0 (en)
GB (1) GB2420058B (en)
WO (1) WO2004091090A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006133212A2 (en) * 2005-06-06 2006-12-14 Logcon Spec Ops, Inc. Marine locator device
FR2931949A1 (en) * 2008-06-03 2009-12-04 Tes Electronic Solutions Autonomous radio beacon for locating position of e.g. ship, has transmission paths comprising printed circuit board provided with microcontroller and frequency synthesizer, and amplifiers respectively connected to helical antennas by paths

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992692A (en) * 1975-07-23 1976-11-16 The United States Of America As Represented By The Secretary Of The Navy Programmable underwater acoustic beacon
US5497402A (en) * 1993-12-17 1996-03-05 Electronics And Telecommunications Research Institute Automatic frequency control device for satellite communications ground system
EP0484158B1 (en) * 1990-10-31 1996-04-17 Nec Corporation Radio transceiver having PLL synthesizer
US6501340B1 (en) * 2002-02-11 2002-12-31 Acr Electronics, Inc. Oscillator with frequency stabilizing circuit and method of constructing same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992692A (en) * 1975-07-23 1976-11-16 The United States Of America As Represented By The Secretary Of The Navy Programmable underwater acoustic beacon
EP0484158B1 (en) * 1990-10-31 1996-04-17 Nec Corporation Radio transceiver having PLL synthesizer
US5497402A (en) * 1993-12-17 1996-03-05 Electronics And Telecommunications Research Institute Automatic frequency control device for satellite communications ground system
US6501340B1 (en) * 2002-02-11 2002-12-31 Acr Electronics, Inc. Oscillator with frequency stabilizing circuit and method of constructing same

Also Published As

Publication number Publication date
GB0522567D0 (en) 2005-12-14
AU2003901650A0 (en) 2003-05-01
GB2420058B (en) 2007-04-11
WO2004091090A1 (en) 2004-10-21

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Legal Events

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

Effective date: 20110407