Measuring transducer

Details Measuring transducer Measuring transducer

G - Physics

01

L

G01L 1/14 (2006.01) A61C 19/05 (2006.01) G01L 5/00 (2006.01)

Patent

CA 2538950

The invention relates to a force transducer, comprising an oscillator (1), with an inductance (2), formed by a primary winding and a measuring transducer (11), with a secondary winding (30), electrically-connected to the measuring transducer (11) and arranged with a transformer coupling to the inductance (2) of the oscillator (1). On exertion of a force on the measuring transducer (11), the impedance of the measuring transducer (11) is altered, along with the load in the inductively-coupled secondary winding (30). The resulting frequency change in the oscillator (1) is determined by means of an analytical circuit (14) which is proportional to the force acting on the measuring transducer (11).

L'invention concerne un transducteur de force pourvu d'un oscillateur (1), présentant une inductance (2) formée par un enroulement primaire, et d'un capteur (11) présentant un enroulement secondaire (30) qui est relié à ce capteur (11) de façon électroconductrice et couplé à l'inductance (2) de l'oscillateur (1) par transformateur. Sous l'effet d'une force exercée sur le capteur (11), l'impédance du capteur (11) et la charge de l'enroulement secondaire (30) à couplage inductif varient. La variation de fréquence de l'oscillateur (1) qui en résulte est déterminée au moyen d'un circuit d'évaluation (14), laquelle variation de fréquence est proportionnelle à la force exercée sur le capteur (11).

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