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US 5,684,246 AGranted
Method and apparatus for improved flow rate measurement and calibration
AssigneeSierra Instruments, Inc.
InventorDavid M. Korpi
Life of this patent
Estimating the term…
Abstract
A method and apparatus for precise measurement and calibration of gas flow rates is described. The apparatus and method employ precision-bored cylinders adapted for operation with ultrasonic transducers under the control of computer subroutines for accomplishing the desired methods.
Claims6
A flow meter calibration system comprising:
- a conduit through which a fluid can flow;
- a uniform cross-section cylinder communicating with the conduit;
- a piston being slidably sealed to the walls of the cylinder and being movable along the length of the cylinder;
- position transducer means for sensing the position of the piston within the cylinder and for producing an output signal corresponding to that position;
- computation means for operating on the output signal to yield a calculated flow rate of the fluid in the conduit;
- graphical output means for displaying a plot of the calculated flow rate versus time.
3 more elements
A flow meter calibration system comprising:
- a conduit through which a fluid can flow;
- a uniform cross-section cylinder communicating with the conduit;
- a piston being slidably sealed to the walls of the cylinder and being movable along the length of the cylinder;
- position transducer means for taking a number of samples of the position of the piston within the cylinder and for producing output signals corresponding to those positions;
- computation means for operating on the output signals to yield calculated flow rates of the fluid in the conduit;
- graphical output means for displaying a plot of the calculated flow rates versus the number of samples taken.
3 more elements
Dependencies are inferred from the claim text.