| US 7,503,225 B2 | ||
| Ultrasonic flow sensor having a transducer array and reflective surface | ||
| Tobias Lang, Stuttgart (Germany) | ||
| Assigned to Robert Bosch GmbH, Stuttgart (Germany) | ||
| Appl. No. 10/593,143 PCT Filed Jan. 24, 2005, PCT No. PCT/EP2005/050287 § 371(c)(1), (2), (4) Date Jun. 26, 2007, PCT Pub. No. WO2005/090929, PCT Pub. Date Sep. 29, 2005. |
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| Claims priority of application No. 10 2004 013 251 (DE), filed on Mar. 18, 2004. | ||
| Prior Publication US 2007/0261501 A1, Nov. 15, 2007 | ||
| Int. Cl. G01F 1/66 (2006.01) | ||
| U.S. Cl. 73—861.25 [73/861.27] | 11 Claims |
| 1. An ultrasonic flow sensor, comprising:
an array of a plurality of ultrasonic transducers for receiving and transmitting ultrasonic signals, the array being positioned
on a pipe and emitting the ultrasonic signals to flow through a fluid flowing in the pipe;
a reflective surface lying opposite the array; and
a receiver electronic system that detects and evaluates an ultrasonic signal reflected on the reflective surface and received
on the array;
wherein the transducers of the array are activated in such a way that a wave reflected on the reflective surface impinges
on the array in one of an essentially punctiform manner and a linear manner.
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