Differential pressure measuring system and differential pressure measuring method
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United States of America Patent
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Nov 24, 2009
Grant Date -
Apr 26, 2007
app pub date -
Oct 2, 2006
filing date -
Oct 3, 2005
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Abstract
A differential pressure measuring system includes a light source for emitting a light, a first transducer for attenuating the intensity of the emitted light in a first range, depending on a first pressure, and providing a first light, a second transducer for attenuating the intensity of the first light in a second range, depending on a second pressure, and providing a second light, a feedback circuit for adjusting the intensity of the emitted light to maintain the intensity of the second light in the second range constant, and a measuring module for measuring a differential pressure between the first and second pressures, based on the intensities of the second light in the first and second ranges.
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