Patent ID: 7552652
Filing Date: 2009-06-30
Classification: G01F

Abstract:
1. A device for determining and/or monitoring volume, and/or mass, flow of a medium flowing through a containment in a stream direction, comprising: at least one ultrasonic transducer, which emits and/or receives ultrasonic measuring signals; a control/evaluation unit, which determines volume, and/or mass, flow of the medium in the containment on the basis of the ultrasonic measuring signals according to travel-time difference or Doppler shift; a first clock-pulse generator having a first pulse rate; and a second clock-pulse generator having a second pulse rate, wherein: said first pulse rate is greater than said second pulse rate; and said control/evaluation unit operates said first clock-pulse generator intermittently, and sizes duration of a turn-on, or measuring, phase and/or a resting phase as a function of available energy.