Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2005-08-09
2005-08-09
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
C702S050000, C702S054000, C073S861290
Reexamination Certificate
active
06928369
ABSTRACT:
The present invention provides a small, low power consumption ultrasonic flow velocity meter. The burst signal generation section110generates two kinds of burst signals with a phase difference and sends these burst signals to a pair of transmission/reception ultrasonic transducers6and7located on the upstream side and downstream side of the conduit to be measured9.Upon reception of the corresponding burst signals, the pair of the transmission/reception ultrasonic transducers6and7convert the burst signals, send ultrasonic waves with a phase difference to the conduit to be measured9,receive the ultrasonic wave sent by the other transmission/reception ultrasonic transducer and propagated through the conduit to be measured and convert the ultrasonic waves to received signals. These received signals are binarized through the binarization circuits16and17, exclusive-ORed by the exclusive-OR circuit30and converted to a phase difference signal indicating a phase difference and the flow velocity of the conduit to be measured9is measured based on this phase difference signal.
REFERENCES:
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Iwabuchi Hiroshi
Kishimoto Masao
Motegi Ryohei
Suzuki Yukihiko
Barlow John
McGinn & Gibb pllc
Tokimec Inc.
Walling Meagan S
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