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POSITION MEASURING DEVICE [8 records]

Record 1 2024-02-22

English

Subject field(s)
  • Automatic Control (Machine Tools)
  • Machine-Tooling (Metallurgy)

French

Domaine(s)
  • Commandes automatiques (Machines-outils)
  • Usinage (Métallurgie)

Spanish

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Record 2 2017-04-13

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Nuclear Fission Reactors
  • Nuclear Plant Safety
CONT

This internal instrumentation system for a nuclear reactor comprises at least : a probe for measuring the neutron flux in the core of the nuclear reactor; a displacement cable for moving the probe inside the core; a rotary drive device for the displacement cable; and a determination device for determining the angular position of the rotary drive device...

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Réacteurs nucléaires de fission
  • Sûreté des centrales nucléaires
CONT

Système d'instrumentation interne d'un réacteur nucléaire, du type comprenant au moins : - une sonde de mesure du flux neutronique dans le cœur du réacteur nucléaire, - un câble de déplacement de la sonde à l'intérieur du cœur, - un dispositif rotatif d'entraînement du câble de déplacement [...]

Spanish

Save record 2

Record 3 2009-01-14

English

Subject field(s)
  • Flight Instruments and Equipment (Aeroindustry)
  • Aircraft Piloting and Navigation
  • Navigation Instruments
  • Launching and Space Maneuvering
CONT

Laser Position Measurement. A commercially available position measuring device, Lasernet, was donated by the Namco Controls Corporation. A single narrow-beam laser is continuously swept across the field at a fixed height. A reflector of known geometry on the vehicle reflects the beam back to the device, which reports the initial angle, in the local geographic frame, at which a reflection is detected and the angular width over which the reflection is continuously detected. Knowing the geometry of the reflector, which should be independent of the heading of the aircraft, is sufficient to determine the vehicle's two-dimensional position in the local geographic frame.

Key term(s)
  • position measuring apparatus

French

Domaine(s)
  • Instruments et équipement de bord (Constructions aéronautiques)
  • Pilotage et navigation aérienne
  • Instruments de navigation
  • Lancement et manœuvres dans l'espace
CONT

La centrale à inertie est un appareil de mesure du positionnement très utilisé en raison de son autonomie et de sa faible sensibilité aux perturbations externes. On en trouve à bord des avions de ligne, des sous-marins, ou des missiles intercontinentaux. Elle est aujourd'hui souvent couplée à un GPS : ce système hybride permet de réduire les erreurs, et donc d'améliorer la qualité de la mesure.

Spanish

Save record 3

Record 4 2004-09-24

English

Subject field(s)
  • Weather Stations and Meteorological Instruments and Equipment
  • Launching and Space Maneuvering
CONT

Circuit of electric field measurements of thunderclouds.... The electric field mill is a device based on electrostatic induction. It consists of one or two electrodes which either rotate in an electrostatic field or become periodically exposed to a field by rotating vanes. Fig. 46 illustrates a cylindrical field mill which consists of two cylinder halves that are electrically insulated from each other. An electric motor rotates the two halves in the electric field to be measured so that they become alternately exposed to both the positive and negative direction of the field. The result is that an alternating(ac) signal is generated across the two halves which can be easily amplified.... Although not commonly used, the cylindrical field mill has the advantage that when mounted in a fixed position it can also indicate the direction of the field. This is accomplished by measuring the phase shift of the ac signal relative to the orientation of electric fields need to be measured.

CONT

The device normally used to measure atmospheric electric fields is a type of sensor called an electric field mill. It can be used on the ground to gain information about the field aloft, or it can be flown on an airplane or balloon. Thirty-one ground-based field mills at Cape Canaveral Air Force Station and the Kennedy Space Center are used to measure the electric field just above the surface of Earth, in the lowest meter of the atmosphere, and determine if it meets the safety levels specified in the Lightning Launch Commit Criteria. The small, cylindrical field mill is mounted upside down.

French

Domaine(s)
  • Stations, instruments et équipements météorologiques
  • Lancement et manœuvres dans l'espace

Spanish

Save record 4

Record 5 1987-09-30

English

Subject field(s)
  • Ground Equipment (Airports)
CONT

The SAAB Friction Tester (SFT) ... was acquired in May 1985 ... in order to determine whether rubber build-up should be removed from a runway.

OBS

Surface Friction Tester(SFT). The SFT is a friction test device built into an automobile. It uses a fifth wheel with a constant slip.... The fifth wheel is lowered from its retracted position under the luggage compartment of the car when measuring.... The forces acting on the measuring wheel as a result of the friction are measured and the information processed in a mini-computer located in a centre console below the dashboard in the car.

OBS

SAAB : Svenska Aeroplan Aktiebolaget (Swedish automobile manufacturer; acronym used as name of its car).

French

Domaine(s)
  • Matériel de piste (Aéroports)
OBS

SAAB : Société de construction automobile suédoise.

Spanish

Save record 5

Record 6 1987-09-30

English

Subject field(s)
  • Ground Equipment (Airports)
CONT

Surface friction tester(SFT). The SFT is a friction device built into an automobile. It uses a fifth wheel with a constant slip.... The fifth wheel is lowered from its retracted position under the luggage compartment of the car when measuring.... The forces acting on the measuring wheel as a result of the friction are measured and the information processed in a mini-computer located in a centre console below the dashboard in the car.

French

Domaine(s)
  • Matériel de piste (Aéroports)

Spanish

Save record 6

Record 7 1985-01-15

English

Subject field(s)
  • Metrology and Units of Measure
CONT

NON-SELF-INDICATING LEAD MEASURING DEVICE... Enclosed sliding poises. When the device permits printing, this must only be possible when the equilibrium index is in the reference position to within the nearest half scale interval and when the sliding poise and minor bars are each in a position corresponding to a whole number of scale divisions.

French

Domaine(s)
  • Unités de mesure et métrologie
CONT

DISPOSITIF MESUREUR DE CHARGE À ÉQUILIBRE NON AUTOMATIQUE [...] Poids curseurs sous carter. Lorsque le dispositif permet l'impression, celle-ci ne doit être possible que lorsque l'index d'équilibre est en position de référence à un demi-échelon près et que le curseur et les réglettes occupent chacun une position correspondant à un nombre entier d'échelons.

Spanish

Save record 7

Record 8 1981-11-24

English

Subject field(s)
  • Aeroindustry
CONT

The British device is described officially as a Laser True Airspeed System(LATAS) ;it might be more accurate to call it a "potential" or "future" airspeed measuring system, since its function is to advise the pilot what his airspeed will be when he traverses a zone located a short distance ahead of his current position at any given moment. Normally this distance is in the 500-600 m range, far enough ahead at normal approach speeds of 360-450 km/h(200-250kn) to give the pilot some four to six seconds warning to recognize an impending change in true airspeed [due to turbulence] and to take any necessary corrective action.

French

Domaine(s)
  • Constructions aéronautiques
CONT

Le dispositif britannique est officiellement appelé "Laser True Airspeed System" ou LATAS (système laser de mesure de la vitesse propre), mais il serait sans doute plus exact de le considérer comme un système de mesure de la vitesse propre "possible" ou "future", puisque son rôle est d'indiquer au pilote quelle sera la vitesse de l'avion lorsqu'il traversera une zone située à une faible distance de la position du moment. Normalement, cette distance sera de l'ordre de 500 à 600 m, ce qui, aux vitesses normales d'approche (360 à 450 km/h), devrait avertir le pilote quatre à six secondes à l'avance des modifications imminentes de la vitesse propre et lui permettre de prendre les mesures correctives nécessaires.

Spanish

Save record 8

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