Measuring and testing – Volume or rate of flow – Thermal type
Patent
1992-08-03
1995-05-30
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Thermal type
324706, 324725, G01F 168
Patent
active
054191904
ABSTRACT:
A method and apparatus for measuring mass flow rates and other characteristics of a fluid in a large conduit uses a sensor circuit having a heater/thermometer, a reference resistor, and a thermometer resistor arranged in four-wire network to enable measurement of all characteristics of the resistor network. That sensor circuit is preferably mounted on an interior wall surface of a support tube. A plurality of such support tubes, each having a plurality of sensors within the support tube, are mounted in an array in the cross section of the duct. A cleaning plate for cleaning the exterior surface of the support tube permits calibration of the network while cleaning. A program for using the circuit to calculate values of interest and to display desirable output data is also disclosed, as is a program for controlling the cleaning/calibration cycle.
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Goldstein Herbert
Kananen Ronald P.
Thermal Instrument Co.
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