| US 7,552,652 B2 | ||
| Device for determining and/or monitoring the volume-and/or mass-flow of a medium | ||
| Thomas Fröhlich, Münchenstein (Switzerland); Klaus Bussinger, Reinach (Switzerland); and Jacobson Saul, Basel (Switzerland) | ||
| Assigned to Endress + Hauser Flowtec AG, Reinach (Switzerland) | ||
| Appl. No. 11/579,815 PCT Filed May 04, 2005, PCT No. PCT/EP2005/052058 § 371(c)(1), (2), (4) Date Aug. 27, 2007, PCT Pub. No. WO2005/111549, PCT Pub. Date Nov. 24, 2005. |
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| Claims priority of application No. 10 2004 023 147 (DE), filed on May 07, 2004. | ||
| Prior Publication US 2008/0148866 A1, Jun. 26, 2008 | ||
| Int. Cl. G01F 1/66 (2006.01) | ||
| U.S. Cl. 73—861.28 | 16 Claims |
| 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.
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