Patent ID: 7620505
Filing Date: 2009-11-17
Classification: G01F

Abstract:
1. A flow measuring device for determining and/or monitoring the volume, and/or mass, flow rate of a medium flowing through a containment in a streaming direction, comprising: at least one ultrasonic transducer, which emits and/or receives ultrasonic measuring signals; and a control/evaluation unit, which determines the volume, and/or mass, flow rate of the medium in the containment on the basis of the ultrasonic measuring signals according to the travel-time-difference principle or according to the Doppler principle, wherein: associated with said control/evaluation unit is at least one component of high power uptake; said control/evaluation unit is embodied such that said at least one component of high power uptake is operated intermittently in a measuring phase and in an idle phase, wherein said at least one component is activated in the measuring phase, while said at least one component has a reduced power uptake, or is turned off, in the idle phase, and the time span between two successive measuring, or idle, phases of said at least one component of high power uptake and/or the duration of a measuring phase (t