JPS5746171A - System for measuring underwater position - Google Patents

System for measuring underwater position

Info

Publication number
JPS5746171A
JPS5746171A JP12225680A JP12225680A JPS5746171A JP S5746171 A JPS5746171 A JP S5746171A JP 12225680 A JP12225680 A JP 12225680A JP 12225680 A JP12225680 A JP 12225680A JP S5746171 A JPS5746171 A JP S5746171A
Authority
JP
Japan
Prior art keywords
sent
depth
water
pressure meter
underwater object
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.)
Pending
Application number
JP12225680A
Other languages
Japanese (ja)
Inventor
Kiyoshi Kotanino
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12225680A priority Critical patent/JPS5746171A/en
Publication of JPS5746171A publication Critical patent/JPS5746171A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To quickly display the correct underwater position by a simple device in measuring the position of an underwater object by converting the pressure of a water pressure meter fixed to the underwater object into an electric signal, transmitting it, demodulating it in a receiving side, and directly obtaining the water depth. CONSTITUTION:The water pressure meter 12 is fixed to the underwater object provided at the position Td. The water pressure P is based on the depth of the pressure meter 12 and sent to a frequency modulator 8 as a divided voltage of a potentiometer 13. The modulator 8 shifts the frequency of a reference frequency generator 7 based on the depth. A signal having a specified time length and repeating cycles is obtained in a gate circuit 9. The output of a power amplifier 11 is sent from a tranmitting part 1' as an ultrasonic wave. The outputs from receivers provided at positions Ta-Tc are sent to a receiving part 2. The distance between each receiver and a transmitting part is sent to an operation processing part 3. The output from at least one receiver is sent to a water depth data demodulator 15. Horizontal positions x and y and a depth z are directly outputted to a display 4 from the outputs of the processing part 3 and demodulator 15.
JP12225680A 1980-09-05 1980-09-05 System for measuring underwater position Pending JPS5746171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12225680A JPS5746171A (en) 1980-09-05 1980-09-05 System for measuring underwater position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12225680A JPS5746171A (en) 1980-09-05 1980-09-05 System for measuring underwater position

Publications (1)

Publication Number Publication Date
JPS5746171A true JPS5746171A (en) 1982-03-16

Family

ID=14831443

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12225680A Pending JPS5746171A (en) 1980-09-05 1980-09-05 System for measuring underwater position

Country Status (1)

Country Link
JP (1) JPS5746171A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6025135A (en) * 1983-07-20 1985-02-07 Matsushita Electronics Corp Formation of white diffusion coating for tublar bulb
JPS6130714A (en) * 1984-07-23 1986-02-13 Shipbuild Res Assoc Japan Apparatus for detecting position of anchor at time of anchoring
JP2014035328A (en) * 2012-08-10 2014-02-24 Tokyo Univ Of Marine Science & Technology Underwater positional relation information acquisition system and underwater positional relation information acquisition method
CN110749861A (en) * 2019-10-24 2020-02-04 哈尔滨工程大学 Three-dimensional positioning method for underwater fixed target based on multiple assumed depths

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031887A (en) * 1973-07-19 1975-03-28
JPS53108467A (en) * 1977-03-04 1978-09-21 Hitachi Ltd Locating system for underwater body

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031887A (en) * 1973-07-19 1975-03-28
JPS53108467A (en) * 1977-03-04 1978-09-21 Hitachi Ltd Locating system for underwater body

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6025135A (en) * 1983-07-20 1985-02-07 Matsushita Electronics Corp Formation of white diffusion coating for tublar bulb
JPS6130714A (en) * 1984-07-23 1986-02-13 Shipbuild Res Assoc Japan Apparatus for detecting position of anchor at time of anchoring
JP2014035328A (en) * 2012-08-10 2014-02-24 Tokyo Univ Of Marine Science & Technology Underwater positional relation information acquisition system and underwater positional relation information acquisition method
CN110749861A (en) * 2019-10-24 2020-02-04 哈尔滨工程大学 Three-dimensional positioning method for underwater fixed target based on multiple assumed depths
CN110749861B (en) * 2019-10-24 2022-06-17 哈尔滨工程大学 Three-dimensional positioning method for underwater fixed target based on multiple assumed depths

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