JPS5724872A - Direction measuring apparatus - Google Patents

Direction measuring apparatus

Info

Publication number
JPS5724872A
JPS5724872A JP10097180A JP10097180A JPS5724872A JP S5724872 A JPS5724872 A JP S5724872A JP 10097180 A JP10097180 A JP 10097180A JP 10097180 A JP10097180 A JP 10097180A JP S5724872 A JPS5724872 A JP S5724872A
Authority
JP
Japan
Prior art keywords
output
level difference
circuits
difference detection
saturated
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
JP10097180A
Other languages
Japanese (ja)
Other versions
JPS5925985B2 (en
Inventor
Mutsumasa Hosono
Mutsuhiro Matsuda
Yozo Fujino
Shoichiro Kawamura
Kimio Yonezu
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.)
Technical Research and Development Institute of Japan Defence Agency
Original Assignee
Technical Research and Development Institute of Japan Defence Agency
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 Technical Research and Development Institute of Japan Defence Agency filed Critical Technical Research and Development Institute of Japan Defence Agency
Priority to JP10097180A priority Critical patent/JPS5925985B2/en
Publication of JPS5724872A publication Critical patent/JPS5724872A/en
Publication of JPS5925985B2 publication Critical patent/JPS5925985B2/en
Expired 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
    • 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
    • G01S3/30—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 directly from separate directional systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

PURPOSE:To accomplish an accurate direction measuring by employing the output of a level difference detection circuit separately formed when a receiving circuit is saturated. CONSTITUTION:Antennas 21-28 with the same directivity are arranged at an equispace over the entire directions in such a manner as to be separately combined with receiving circuits 29-1-29-8 having a logarithmic amplification detecting characteristic. Level difference detection circuits 31-1-31-8 are provided to detect an output difference between adjacent receiving circuits and level difference detection circuits 32-1-32-8 are provided to detect an output level difference between the adjacent two receiving circuits. For example, when neither of 30-2 and 30-3 is saturated among saturation detection circuits 30-1-30-8, the output of the level difference detection circuit 31-2 is used while when either thereof is saturated, the output of the level difference detection circuit 32-1 is used to measure respective directions. Thus, accurate bearing measurement can be performed. In this example, the output of the receiving circuits is added at an interval of every two but permissibly at one or more.
JP10097180A 1980-07-23 1980-07-23 Direction measuring device Expired JPS5925985B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10097180A JPS5925985B2 (en) 1980-07-23 1980-07-23 Direction measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10097180A JPS5925985B2 (en) 1980-07-23 1980-07-23 Direction measuring device

Publications (2)

Publication Number Publication Date
JPS5724872A true JPS5724872A (en) 1982-02-09
JPS5925985B2 JPS5925985B2 (en) 1984-06-22

Family

ID=14288229

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10097180A Expired JPS5925985B2 (en) 1980-07-23 1980-07-23 Direction measuring device

Country Status (1)

Country Link
JP (1) JPS5925985B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3632114A1 (en) * 1986-09-22 1988-03-31 Plath Naut Elektron Tech Method for error-free determination of direction-finding angles in accordance with the Watson-Watt principle, by means of circular arrays of directional antennas
JPH02141684A (en) * 1988-11-22 1990-05-31 Nec Corp Angle measuring apparatus
JP2009229077A (en) * 2008-03-19 2009-10-08 Sumitomo Electric Ind Ltd Road-vehicle communication system, optical beacon for use in it, and vehicle position evaluation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3632114A1 (en) * 1986-09-22 1988-03-31 Plath Naut Elektron Tech Method for error-free determination of direction-finding angles in accordance with the Watson-Watt principle, by means of circular arrays of directional antennas
JPH02141684A (en) * 1988-11-22 1990-05-31 Nec Corp Angle measuring apparatus
JP2009229077A (en) * 2008-03-19 2009-10-08 Sumitomo Electric Ind Ltd Road-vehicle communication system, optical beacon for use in it, and vehicle position evaluation method

Also Published As

Publication number Publication date
JPS5925985B2 (en) 1984-06-22

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