Patent ID: 9188469
Filing Date: 2015-11-17
Classification: G01F

Abstract:
1. A sensor system for measuring a velocity of a fluid flowing through a channel, comprising: a heating element for heating the fluid, wherein the heating element is provided with a known level of power during operation; a primary electronic circuit having a primary resonance frequency, wherein the primary resonance frequency is temperature dependent, wherein a temperature of at least a part of the primary electronic circuit is determined by heat transferred from the heating element to the fluid flowing through the channel, said at least a part being responsible for making the primary resonance frequency temperature dependent; and a transducer arrangement configured to generate a measurement signal indicative of the velocity of the fluid flowing through the channel, wherein the measurement signal is based on the primary resonance frequency, wherein the primary electronic circuit comprises a resonant circuit including an inductor connected in series with a capacitor of the heating element, and wherein the capacitor has a capacitance that is dependent on temperature.