Method and apparatus for calibrating an ultrasonic sensing system used to detect moving objects
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United States of America Patent
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Mar 30, 2010
Grant Date -
Apr 24, 2008
app pub date -
Jan 9, 2007
filing date -
Oct 18, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A calibration device is described for use in calibrating an ultrasonic pulse echo apparatus for detecting a moving object in a fluid, where the ultrasonic pulse echo apparatus includes an ultrasonic transducer and calibration circuitry. A connector has a first end for connecting with a first fluid conduit and a second end for connecting with a second fluid conduit. A cavity between the first and second ends permits the fluid containing the moving object from the first conduit to flow through the connector cavity to the second fluid conduit. A first calibration sphere is positioned relative to the connector for reflecting an ultrasonic pulse signal transmitted by the ultrasonic transducer. The reflected ultrasonic pulse signal is useable by the calibration circuitry to calibrate the ultrasonic pulse echo apparatus.
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