TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

ultrasonic detector [3 records]

Record 1 2011-03-08

English

Subject field(s)
  • Security Devices
  • Recording and Control Instrumentation
CONT

The better class of ultrasonic detector has a built-in compensating device to allow for daily differences in the volume of the contents of a room.

OBS

Ultrasonic systems detect motion by filling an area with inaudible sound and then monitoring the standing wave pattern. Any movement in the area disturbs the wave pattern and triggers an alarm.

Key term(s)
  • ultrasonic sound detecting device

French

Domaine(s)
  • Dispositifs de sécurité
  • Appareils de contrôle et d'enregistrement
DEF

Appareil émettant des ondes acoustiques d'une fréquence donnée et qui, lors d'une modification de la fréquence originale, déclenche l'alarme.

CONT

Avec les détecteurs à ultrasons, on débouche sur des systèmes plus évolués, mais de maniement plus délicat.

Spanish

Save record 1

Record 2 2006-04-06

English

Subject field(s)
  • Analytical Chemistry
DEF

A non-destructive detector which measures the frequency of a beat between two opposing ultrasonic vibrations placed at the outlets of a reference gas flow and the column gas flow respectively; the changes in frequency arising when solutes are eluted with the column gas stream are converted into a series of impulses corresponding to the solute concentrations.

French

Domaine(s)
  • Chimie analytique
OBS

ultrasonique : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2006).

Spanish

Save record 2

Record 3 1994-08-16

English

Subject field(s)
  • Security Devices
  • Recording and Control Instrumentation

French

Domaine(s)
  • Dispositifs de sécurité
  • Appareils de contrôle et d'enregistrement
DEF

Appareil d'émission d'ultrasons déclenchant un signal d'alarme lorsque sa fréquence d'émission est modifiée.

Spanish

Campo(s) temático(s)
  • Dispositivos de seguridad
  • Instrumentos de control y registro
Save record 3

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