JPS55114970A - Automatic position detection system - Google Patents

Automatic position detection system

Info

Publication number
JPS55114970A
JPS55114970A JP2311279A JP2311279A JPS55114970A JP S55114970 A JPS55114970 A JP S55114970A JP 2311279 A JP2311279 A JP 2311279A JP 2311279 A JP2311279 A JP 2311279A JP S55114970 A JPS55114970 A JP S55114970A
Authority
JP
Japan
Prior art keywords
station
fix
propagation time
time difference
sound information
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.)
Pending
Application number
JP2311279A
Other languages
Japanese (ja)
Inventor
Takahiro Yokota
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2311279A priority Critical patent/JPS55114970A/en
Publication of JPS55114970A publication Critical patent/JPS55114970A/en
Pending 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
    • 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
    • G01S5/12—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 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Traffic Control Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To maintain a local route to detect accurately a position with a simple equipment, by causing a moving station to move along a fixed equal propagation time difference hyperbola. CONSTITUTION:Broadcast station BC1 of a medium wave, etc., transmits always sound information with a fixed carrier frequency, and base station FIX receives the radio wave from station BC1 to extract sound information and retransmits it with the carrier wave of VHF or UHF, and moving station P receives radio waves from station BC1 and station FIX to extract respective sound information and compares their phases and returns information of phase difference to station FIX with the carrier wave of VHF or UHF. In station FIX, an equal propagation time difference hyperbola is obtained on a basis of phase information received from station P. This measurement is performed for another broadcast station BC2 also, and an equal propagation time difference hyperbola is obtained similarly, and the geographical position of station P can be obtained as the intersection between two obtained hyperbolas. The obtained position is reported to station P with the radio wave transmitted from station FIX.
JP2311279A 1979-02-28 1979-02-28 Automatic position detection system Pending JPS55114970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2311279A JPS55114970A (en) 1979-02-28 1979-02-28 Automatic position detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2311279A JPS55114970A (en) 1979-02-28 1979-02-28 Automatic position detection system

Publications (1)

Publication Number Publication Date
JPS55114970A true JPS55114970A (en) 1980-09-04

Family

ID=12101388

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2311279A Pending JPS55114970A (en) 1979-02-28 1979-02-28 Automatic position detection system

Country Status (1)

Country Link
JP (1) JPS55114970A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120029818A1 (en) * 2006-10-17 2012-02-02 Ut-Battelle, Llc Triply Redundant Integrated Navigation and Asset Visibility System

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120029818A1 (en) * 2006-10-17 2012-02-02 Ut-Battelle, Llc Triply Redundant Integrated Navigation and Asset Visibility System
US8355866B2 (en) * 2006-10-17 2013-01-15 Ut-Battelle, Llc Triply redundant integrated navigation and asset visibility system

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