JPS6416979A - Method for measuring direction of moving body - Google Patents

Method for measuring direction of moving body

Info

Publication number
JPS6416979A
JPS6416979A JP17365687A JP17365687A JPS6416979A JP S6416979 A JPS6416979 A JP S6416979A JP 17365687 A JP17365687 A JP 17365687A JP 17365687 A JP17365687 A JP 17365687A JP S6416979 A JPS6416979 A JP S6416979A
Authority
JP
Japan
Prior art keywords
antennas
moving body
phase difference
stored
converter
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
JP17365687A
Other languages
Japanese (ja)
Other versions
JPH0513586B2 (en
Inventor
Yoshizo Hagino
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.)
Japan Radio Co Ltd
Original Assignee
Japan Radio 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 Japan Radio Co Ltd filed Critical Japan Radio Co Ltd
Priority to JP17365687A priority Critical patent/JPS6416979A/en
Publication of JPS6416979A publication Critical patent/JPS6416979A/en
Publication of JPH0513586B2 publication Critical patent/JPH0513586B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

PURPOSE:To measure the direction of a moving body by installing plural antennas on the moving body separately and measuring the phase difference between radio waves. CONSTITUTION:The radio waves from two broadcasting stations are received by the antennas 1 and 2 fixed on the moving body and converted by a frequency switching converter 4 to a measurement frequency (f) which is a common multiple or multiple of their transmission frequencies. The interval between the antennas 1 and 2 is set <=1/2 of the wavelength of the measurement frequency previously. A phase difference measuring instrument 5 detects the phase difference between the measurement frequencies (f) by the antennas 1 and 2 which are converted by the converter 4 and the phase difference is passed through a code discriminator 7 to select one positive or negative value, which is stored in a memory circuit 8. Then an antenna switch 3 switches the antennas, the converter 4 performs conversion to the frequency (f), and one positive or negative value is stored in the circuit 8 through the measuring instrument 5 and discriminator 7. Then an angle detector 9 and an azimuth calculator 10 find a direction angle common to the two transmitting stations from the two phase differences stored in the circuit 8 and the interval between the antennas 1 and 2, and the angle is displayed on a display device 11 as the direction of the moving body.
JP17365687A 1987-07-10 1987-07-10 Method for measuring direction of moving body Granted JPS6416979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17365687A JPS6416979A (en) 1987-07-10 1987-07-10 Method for measuring direction of moving body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17365687A JPS6416979A (en) 1987-07-10 1987-07-10 Method for measuring direction of moving body

Publications (2)

Publication Number Publication Date
JPS6416979A true JPS6416979A (en) 1989-01-20
JPH0513586B2 JPH0513586B2 (en) 1993-02-22

Family

ID=15964660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17365687A Granted JPS6416979A (en) 1987-07-10 1987-07-10 Method for measuring direction of moving body

Country Status (1)

Country Link
JP (1) JPS6416979A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6382041U (en) * 1986-11-17 1988-05-30
US7158078B2 (en) 2002-04-18 2007-01-02 Fujitsu Limited Positioning of mobile wireless terminal

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS582764A (en) * 1981-06-30 1983-01-08 Furuno Electric Co Ltd Direction finding system using hyperbolic navigation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS582764A (en) * 1981-06-30 1983-01-08 Furuno Electric Co Ltd Direction finding system using hyperbolic navigation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6382041U (en) * 1986-11-17 1988-05-30
US7158078B2 (en) 2002-04-18 2007-01-02 Fujitsu Limited Positioning of mobile wireless terminal
US7265716B2 (en) 2002-04-18 2007-09-04 Fujitsu Limited Positioning of mobile wireless terminal
US7304610B2 (en) 2002-04-18 2007-12-04 Fujitsu Limited Positioning of mobile wireless terminal
US7319428B2 (en) 2002-04-18 2008-01-15 Fujitsu Limited Positioning of mobile wireless terminal

Also Published As

Publication number Publication date
JPH0513586B2 (en) 1993-02-22

Similar Documents

Publication Publication Date Title
GB2345811B (en) Radio frequency receiver circuit
EP0339242A3 (en) Method and device in the antenna and receiving system of a radio theodolite
GB2341521A (en) Making measurements on parallel frequencies in a radio communications device
JPS6416979A (en) Method for measuring direction of moving body
GB1524571A (en) Radio navigation system and scanning beam antenna
JPS55121163A (en) Direction measuring unit
JPS55103476A (en) Radio position measuring system
JPS56122535A (en) Antenna equipment
EP0367487B1 (en) RF signal direction finding apparatus
JPH02280083A (en) Measuring instrument for water vapor content and rainfall quantity
JPH1153030A (en) Milimeter wave guiding device
JPS57142575A (en) Distance measuring device
JPS6412626A (en) Mobile communication system
JPS5870622A (en) Receiver
JPS57188147A (en) Radio transmitter and receiver
JPH06273511A (en) Gps receiver for survey
JPS57107651A (en) Receiver for circular polarized electromagnetic wave
JPS5386193A (en) High speed sweep direction searching system
JPS6410187A (en) Gps receiver control system
JPS57103071A (en) Direction finder
JPS5796225A (en) Microwave radiometer
RU1840879C (en) Passive targeting system direction-finder
RU8127U1 (en) RADAR STATION
JPS5786064A (en) Direction finder
JPS5530647A (en) Directive compression receiver