Gas type identification system
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United States of America Patent
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Feb 17, 2004
Grant Date -
N/A
app pub date -
Aug 1, 2001
filing date -
Sep 11, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A gas type identification system includes: a flow path; an ultrasonic measurement section disposed in the flow path, the ultrasonic measurement section including a pair of ultrasonic transducers; a sound velocity calculation section for calculating a sound velocity of a gas flowing through the flow path based on a signal from the ultrasonic measurement section; a sound velocity memory section for previously storing a predetermined sound velocity; and a comparison section for comparing the sound velocity calculated by the sound velocity calculation section with the predetermined sound velocity previously stored in the sound velocity memory section.
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