JPS54119894A - Angle measuring unit - Google Patents

Angle measuring unit

Info

Publication number
JPS54119894A
JPS54119894A JP2732378A JP2732378A JPS54119894A JP S54119894 A JPS54119894 A JP S54119894A JP 2732378 A JP2732378 A JP 2732378A JP 2732378 A JP2732378 A JP 2732378A JP S54119894 A JPS54119894 A JP S54119894A
Authority
JP
Japan
Prior art keywords
signal
sets
antennas
incoming
reception
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
JP2732378A
Other languages
Japanese (ja)
Other versions
JPS576547B2 (en
Inventor
Toshiyuki Izumitani
Toshihiko Hagisawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2732378A priority Critical patent/JPS54119894A/en
Publication of JPS54119894A publication Critical patent/JPS54119894A/en
Publication of JPS576547B2 publication Critical patent/JPS576547B2/ja
Granted 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

Abstract

PURPOSE:To suppress the signal toward wrong direction and to enable angle measurement with high accuracy, by obtaining the sum voltage other than the difference voltage of reception signal every set, in performing angle measurement for the incoming angle of the signal from broad range by locating a plurality of sets of two antennas. CONSTITUTION:When the sets of antennas having an objective azimuth are taken as 32, 33 to 38, and 39, four sets, the reception output of each antenna is logarithmically amplified and detected with the reception circuits 40 to 47, and the difference voltage of the detection output of two antennas is obtained with the differential amplifying circuits 48 to 51 of each set and converted into angular signal with the operation circuits 56 to 59. In this case, the difference voltage is caused to other antenna sets normally adjacent to one incoming signal, causing wrong directional signal. Then, the addition amplifying circuits 52 to 55 are provided to each set,and the sum voltage is obtained by adding two detection outputs, the magnitude of the sum voltages of each set is compared with the gate control signal production circuit 60, the maximum set is identified, the angular signal for true signal incoming range is selected with the gate circuit 61, and it is displayed on the display circuit 62.
JP2732378A 1978-03-09 1978-03-09 Angle measuring unit Granted JPS54119894A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2732378A JPS54119894A (en) 1978-03-09 1978-03-09 Angle measuring unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2732378A JPS54119894A (en) 1978-03-09 1978-03-09 Angle measuring unit

Publications (2)

Publication Number Publication Date
JPS54119894A true JPS54119894A (en) 1979-09-18
JPS576547B2 JPS576547B2 (en) 1982-02-05

Family

ID=12217856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2732378A Granted JPS54119894A (en) 1978-03-09 1978-03-09 Angle measuring unit

Country Status (1)

Country Link
JP (1) JPS54119894A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55129773A (en) * 1979-03-30 1980-10-07 Tech Res & Dev Inst Of Japan Def Agency Direction finder unit
JPS58221179A (en) * 1982-06-17 1983-12-22 Tech Res & Dev Inst Of Japan Def Agency Receiver for direction finding

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0697136B2 (en) * 1985-11-29 1994-11-30 株式会社大川原製作所 Belt conveyor vacuum dryer with enhanced cooling effect

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55129773A (en) * 1979-03-30 1980-10-07 Tech Res & Dev Inst Of Japan Def Agency Direction finder unit
JPS58221179A (en) * 1982-06-17 1983-12-22 Tech Res & Dev Inst Of Japan Def Agency Receiver for direction finding

Also Published As

Publication number Publication date
JPS576547B2 (en) 1982-02-05

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