JPS5724872A - Direction measuring apparatus - Google Patents
Direction measuring apparatusInfo
- 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
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.
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)
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 |
-
1980
- 1980-07-23 JP JP10097180A patent/JPS5925985B2/en not_active Expired
Cited By (3)
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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