Avl List Gmbh

Katarzyna Kudlaty

Michael Wiesinger

Gernot Kubin

Michael Cernusca

Klaus Witrisal

Stefan Nohammer

Stefan NÖHAMMER

A capacitive ultrasonic transducer includes a sensor head having a back plate, the structured front side of which is provided with an insulation layer, and the back side of which is provided with an electrode. In order to achieve an improved construction by means of which increased temperature resistance up to several hundred degrees Celsius can be achieved even in strongly oxidizing and reducing media, the membrane provided as a sound generator is subjected to tensile stress in a planar direction.

Capacitive ultrasonic transducer

In a method for determining the flow rate of fluids using the ultrasonic transit time method, the flow speed and therefrom the flow rate of the fluid is determined from the transit time of ultrasound signals through the measurement section. In order to take into account the change in the transmission function of the ultrasonic converters, which change acts as a drift of the measurement variable, the transmission function of the measurement section is determined at least approximately, and at least one ultrasonic transit time is corrected by means of a correction value that is determined from the group transit time of the transmission function.

Method for determining the flow rate of fluids using the ultrasonic transit time method

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Gössendorf, Austria

Katarzyna Kudlaty