GB1496705A - Direction finding arrangement - Google Patents

Direction finding arrangement

Info

Publication number
GB1496705A
GB1496705A GB1258075A GB1258075A GB1496705A GB 1496705 A GB1496705 A GB 1496705A GB 1258075 A GB1258075 A GB 1258075A GB 1258075 A GB1258075 A GB 1258075A GB 1496705 A GB1496705 A GB 1496705A
Authority
GB
United Kingdom
Prior art keywords
array
frequency
direction finding
speakers
march
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.)
Expired
Application number
GB1258075A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1258075A priority Critical patent/GB1496705A/en
Priority to FR7608712A priority patent/FR2305738A1/en
Publication of GB1496705A publication Critical patent/GB1496705A/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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
    • G01S1/76—Systems for determining direction or position line
    • G01S1/763—Systems for determining direction or position line using the Doppler shift introduced by the relative motion between beacon and receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Stereophonic System (AREA)

Abstract

1496705 Acoustic direction finding apparatus STANDARD TELEPHONES AND CABLES Ltd 18 March 1976 [26 March 1975] 12580/75 Heading G1G In direction finding, a moving sound source is simulated by successively exciting at the same frequency a rectilinear array of loud-speakers, the bearing of a receiver being found from the apparent Doppler shift. A reference frequency which may be the same as the array frequency or offset to define a required guidance angle may be transmitted beforehand, simultaneously, or in time-multiplex with the array transmissions. Adjacent loud-speakers may be a half wavelength apart or less, each loudspeaker may be energized for 1, 4 or 5 cycles. The array frequency may be 1kHz or 1.5kHz with an offset reference frequency of 1.7kHz.
GB1258075A 1975-03-26 1975-03-26 Direction finding arrangement Expired GB1496705A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1258075A GB1496705A (en) 1975-03-26 1975-03-26 Direction finding arrangement
FR7608712A FR2305738A1 (en) 1975-03-26 1976-03-25 RADIOGONIOMETRIC TRANSMITTER ARRANGEMENT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1258075A GB1496705A (en) 1975-03-26 1975-03-26 Direction finding arrangement

Publications (1)

Publication Number Publication Date
GB1496705A true GB1496705A (en) 1977-12-30

Family

ID=10007256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1258075A Expired GB1496705A (en) 1975-03-26 1975-03-26 Direction finding arrangement

Country Status (2)

Country Link
FR (1) FR2305738A1 (en)
GB (1) GB1496705A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112511817A (en) * 2020-11-23 2021-03-16 浙江省计量科学研究院 Dynamic parameter calibration method and calibration device for whistling snapshot system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112511817A (en) * 2020-11-23 2021-03-16 浙江省计量科学研究院 Dynamic parameter calibration method and calibration device for whistling snapshot system

Also Published As

Publication number Publication date
FR2305738A1 (en) 1976-10-22
FR2305738B3 (en) 1978-12-15

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee