Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Reexamination Certificate
2007-07-17
2007-07-17
Thompson, Jewel (Department: 2855)
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
Reexamination Certificate
active
11139740
ABSTRACT:
A transmitting and receiving circuitry system for an ultrasonic flowmeter includes an ultrasound transducer interface for connection to an ultrasound transducer of the ultrasonic flowmeter, an amplifier with a first input and a second input, as well as a signal generator for activating the ultrasound transducer, with the first input of the amplifier connecting to the signal generator while the second input of the amplifier connects both to the ultrasound transducer interface and, via a feedback element, to the output of the amplifier. The impedance of the feedback element can be varied, permitting an adaptation of the transmitting and receiving circuitry to the operating mode of the ultrasonic flowmeter, in particular an adaptation to a transmitting or receiving mode, whereby an overall improvement of the signal-to-noise ratio is attainable. A method for operating such a system is also disclosed.
REFERENCES:
patent: 6584861 (2003-07-01), Jespersen
patent: 6947851 (2005-09-01), Jespersen
patent: 2005/0061085 (2005-03-01), Jesperson
patent: 02174837 (1990-07-01), None
European Search Report, European Patent Office, Jun. 7, 2006.
Cesari & McKenna LLP
Krohne AG
McKenna John F.
Thompson Jewel
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