FR2423752A1 - Boat speed and distance measuring device - uses trailing log and compares shaft angle with compass bearing - Google Patents

Boat speed and distance measuring device - uses trailing log and compares shaft angle with compass bearing

Info

Publication number
FR2423752A1
FR2423752A1 FR7811760A FR7811760A FR2423752A1 FR 2423752 A1 FR2423752 A1 FR 2423752A1 FR 7811760 A FR7811760 A FR 7811760A FR 7811760 A FR7811760 A FR 7811760A FR 2423752 A1 FR2423752 A1 FR 2423752A1
Authority
FR
France
Prior art keywords
shaft
boat
compass bearing
compares
shaft angle
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
FR7811760A
Other languages
French (fr)
Other versions
FR2423752B3 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7811760A priority Critical patent/FR2423752A1/en
Publication of FR2423752A1 publication Critical patent/FR2423752A1/en
Application granted granted Critical
Publication of FR2423752B3 publication Critical patent/FR2423752B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/04—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by terrestrial means
    • G01C21/06—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by terrestrial means involving measuring of drift angle; involving correction for drift
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
    • G01P5/06—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using rotation of vanes

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

The distance and speed of a boat are determined from log trailing by a cable from the boat to rotate the blades for the indicator. Comparison of its shaft angle with compass bearing provides accurate distance measurement. A shaft for the helix extends through the casing of a cylindrical body. The shaft pivots around an axis to extend to the axis of the body. A spring maintains the shaft horizontal. A small cylindrical magnet with poles passes intermediate pole piece to induce alternating flux proportional to boat speed in a coil. A lamp and photocell on a vertical shaft act as transducer permitting transmission of angles to galvanometer for comparison with compass bearing.
FR7811760A 1978-04-20 1978-04-20 Boat speed and distance measuring device - uses trailing log and compares shaft angle with compass bearing Granted FR2423752A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7811760A FR2423752A1 (en) 1978-04-20 1978-04-20 Boat speed and distance measuring device - uses trailing log and compares shaft angle with compass bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7811760A FR2423752A1 (en) 1978-04-20 1978-04-20 Boat speed and distance measuring device - uses trailing log and compares shaft angle with compass bearing

Publications (2)

Publication Number Publication Date
FR2423752A1 true FR2423752A1 (en) 1979-11-16
FR2423752B3 FR2423752B3 (en) 1980-11-14

Family

ID=9207405

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7811760A Granted FR2423752A1 (en) 1978-04-20 1978-04-20 Boat speed and distance measuring device - uses trailing log and compares shaft angle with compass bearing

Country Status (1)

Country Link
FR (1) FR2423752A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181754A1 (en) * 1984-11-07 1986-05-21 Warren Neville Tyson Turbine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181754A1 (en) * 1984-11-07 1986-05-21 Warren Neville Tyson Turbine

Also Published As

Publication number Publication date
FR2423752B3 (en) 1980-11-14

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