Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Ekman_current_meter> ?p ?o }
Showing triples 1 to 31 of
31
with 100 triples per page.
- Ekman_current_meter abstract "The Ekman current meter is a mechanical flowmeter invented by Vagn Walfrid Ekman, a Swedish oceanographer, in 1903. It comprises a propeller with a mechanism to record the number of revolutions, a compass and a recorder with which to record the direction, and a vane that orients the instrument so the propeller faces the current. It is mounted on a free-swinging vertical axis suspended from a wire and has a weight attached below. The balanced propeller, with four to eight blades, rotates inside a protective ring. The position of a lever controls the propeller. In down position the propeller is stopped and the instrument is lowered, after which reaching the desired depth a weight called a messenger is dropped to move the lever into the middle position which allows the propeller to turn freely. When the measurement has been taken another weight is dropped to push the level to its highest position at which the propeller is again stopped. The propeller revolutions are counted via a simple mechanism that gears down the revolutions and counts them on an indicator dial. The direction is indicated by a device connected to the directional vane that drops a small metal ball about every 100 revolutions. The ball falls into one of thirty-six compartments in the bottom of the compass box that indicate direction in increments of 10 degrees. If the direction changes while the measurement is being performed the balls will drop into separate compartments and a weighted mean is taken to determine the average current direction. This is a simple and reliable instrument whose main disadvantage is that is must be hauled up to be read and reset after each measurement. Ekman solved this problem by designed a repeating current meter which could take up to forty-seven measurements before needing to be hauled up and reset. This device used a more complicated system of dropping small numbered metal balls at regular intervals to record the separate measurements.".
- Ekman_current_meter thumbnail Ekman_meter.jpg?width=300.
- Ekman_current_meter wikiPageID "7257439".
- Ekman_current_meter wikiPageLength "2415".
- Ekman_current_meter wikiPageOutDegree "10".
- Ekman_current_meter wikiPageRevisionID "601786143".
- Ekman_current_meter wikiPageWikiLink Category:Physical_oceanography.
- Ekman_current_meter wikiPageWikiLink Current_meter.
- Ekman_current_meter wikiPageWikiLink Ekman_spiral.
- Ekman_current_meter wikiPageWikiLink Ekman_water_bottle.
- Ekman_current_meter wikiPageWikiLink Flow_measurement.
- Ekman_current_meter wikiPageWikiLink Flowmeter.
- Ekman_current_meter wikiPageWikiLink Ocean_current.
- Ekman_current_meter wikiPageWikiLink Oceanic_current.
- Ekman_current_meter wikiPageWikiLink Oceanographer.
- Ekman_current_meter wikiPageWikiLink Oceanography.
- Ekman_current_meter wikiPageWikiLink Sweden.
- Ekman_current_meter wikiPageWikiLink Vagn_Walfrid_Ekman.
- Ekman_current_meter wikiPageWikiLink File:Ekman_meter.jpg.
- Ekman_current_meter wikiPageWikiLinkText "Ekman current meter".
- Ekman_current_meter hasPhotoCollection Ekman_current_meter.
- Ekman_current_meter subject Category:Physical_oceanography.
- Ekman_current_meter hypernym Flowmeter.
- Ekman_current_meter comment "The Ekman current meter is a mechanical flowmeter invented by Vagn Walfrid Ekman, a Swedish oceanographer, in 1903. It comprises a propeller with a mechanism to record the number of revolutions, a compass and a recorder with which to record the direction, and a vane that orients the instrument so the propeller faces the current. It is mounted on a free-swinging vertical axis suspended from a wire and has a weight attached below.".
- Ekman_current_meter label "Ekman current meter".
- Ekman_current_meter sameAs m.025xg0n.
- Ekman_current_meter sameAs Q17074320.
- Ekman_current_meter sameAs Q17074320.
- Ekman_current_meter wasDerivedFrom Ekman_current_meter?oldid=601786143.
- Ekman_current_meter depiction Ekman_meter.jpg.
- Ekman_current_meter isPrimaryTopicOf Ekman_current_meter.