Robert Boschgmbh

Jiawei Zhang

Tobias Lang

Axel Wenzler

Bernhard Opitz

Michael Horstbrink

An ultrasonic flow sensor, in particular for determining the flow velocity of a medium flowing through a pipeline, has at least one ultrasonic converter for transmitting and/or receiving ultrasonic signals, an oscillator, which is connected with the ultrasonic converter, and an evaluation unit, which determines a phase shift of the ultrasonic signal that was received, with respect to a reference signal. The evaluation unit includes a plurality of quadrature demodulators, which operate with different demodulation frequencies and each determine phase information about the ultrasonic signal that was received, and when a vernier unit is provided, which determines&#x2014;based on the individual pieces of phase information&#x2014;a phase angle or a quantity proportional thereto.

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Stuttgart, Germany

Jiawei Zhang