Automatic detection of air flow transducer type under software control
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United States of America Patent
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-
Apr 15, 1997
Grant Date -
N/A
app pub date -
Sep 25, 1995
filing date -
Sep 25, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method and apparatus to enable a computer to determine which of two types of transducer systems in a fluid pressure communication conduit the computer is connected to. One system includes two pressure transducers attached to pressure taps in the conduit, the outputs of these being subtracted in the computer to obtain a pressure difference. The other system includes a differential pressure transducer to measure pressure difference between the two pressure taps. The computer makes a determination as to which of the two systems it is connected to by identifying a time when the airflow in the conduit is zero, and at that time comparing the output of the transducer which may be either one of two types with a voltage level corresponding to zero pressure for a pressure transducer, and a voltage level corresponding to zero flow for a differential pressure transducer.
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