GB1304165A - - Google Patents

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Publication number
GB1304165A
GB1304165A GB1304165DA GB1304165A GB 1304165 A GB1304165 A GB 1304165A GB 1304165D A GB1304165D A GB 1304165DA GB 1304165 A GB1304165 A GB 1304165A
Authority
GB
United Kingdom
Prior art keywords
liquid
synthetic material
platform
density
accelerometer
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
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 filed Critical
Publication of GB1304165A publication Critical patent/GB1304165A/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • G01P1/023—Housings for acceleration measuring devices
    • 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
    • G01C13/002—Measuring the movement of open water
    • G01C13/004—Measuring the movement of open water vertical movement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/006—Details of instruments used for thermal compensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration

Landscapes

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

Abstract

1304165 Vibration damping DATAWELL NV 27 Jan 1971 3258/71 Heading F2S [Also in Division G1] In a pendulum system comprising a liquidfilled vessel 1 and a body suspended therein whose weight differs very little from that of the liquid it displaces, the body is made of synthetic material of density 1 g/cm.<SP>3</SP> and the liquid contains water and substances dissolved therein, the differences in density of the liquid and synthetic material in the temperature range (-5‹ to 35‹ C.) being smaller than 1% of the density of the synthetic material. The system comprises a closed spherical vessel 1 with the body suspended by a thread 3 from a permanently attached radial bar 2. The body comprises a platform 4 of synthetic material, whose weight in the liquid is not affected by liquid absorption, and carries an accelerometer 7 and a dipole 9 (to give the system a permanent orientation). The accelerometer consists mainly of the same material as the platform 4 and the dipole comprises synthetic material 10 and a small metal body 11, which together have the same density as the platform 4. To reduce insulation leakages from an electrical accelerometer the electrical conduction of the liquid is limited by including sugar alcohols as components using e.g., glycerol and/or sorbitol and/or glycol. The temperature limitation avoids differential rates of expansion sufficient to upset the balance of the system unduly. The body is suspended at its centre of gravity and when the system is used for investigating wave phenomena in the sea, its very long period of oscillation ensures that horizontal accelerations of the waves do not tilt the platform, thus enabling vertical accelerations to be measured accurately, so long as the sea temperature is within the required range.
GB1304165D 1971-01-27 1971-01-27 Expired GB1304165A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB325871 1971-01-27

Publications (1)

Publication Number Publication Date
GB1304165A true GB1304165A (en) 1973-01-24

Family

ID=9754944

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1304165D Expired GB1304165A (en) 1971-01-27 1971-01-27

Country Status (1)

Country Link
GB (1) GB1304165A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135394A (en) * 1977-04-27 1979-01-23 Middleton Foster H Wave measuring buoy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135394A (en) * 1977-04-27 1979-01-23 Middleton Foster H Wave measuring buoy

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee