Fill-level indicator

G - Physics – 01 – F

Patent

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Details

G01F 23/28 (2006.01) B06B 1/06 (2006.01) G01F 23/296 (2006.01)

Patent

CA 2137835

Proposed is a fill-level indicator designed to indicate the level of the contents of a container or the storage level of a material at a storage place, the indicator having an ultrasonic transducer which is operated to act alternately as a pulse emitter and as a receiver. The ultrasonic transceiver (31,33,35) is surrounded by the fill-level indicator housing (21) [sic] to form an exactly cylindrical coaxial air gap (38) and has boundary surfaces which produce acoustic impedance jumps to reflect the acoustic energy emitted by the surface of the piezoelectric crystal (31).

La présente invention propose un indicateur de niveau qui mesure le niveau dans un récipient ou la hauteur de stockage d'un matériau de remplissage sur une aire de stockage et qui comporte un transducteur ultrasonore travaillant alternativement comme transducteur d'émission pour l'envoi d'impulsions d'émission et comme transducteur de réception. Ce transducteur d'émission et de réception (31, 33, 35) est entouré par le boîtier (21) de l'indicateur de niveau et forme un entrefer (38) coaxial ayant la forme exacte d'un anneau cylindrique. Pour la réflexion de l'énergie acoustique rayonnée par la surface latérale du cristal piézoélectrique (31), les surfaces limites de ce transducteur d'émission et de réception provoquent des sauts d'impédance acoustique.

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