Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1997-01-28
1998-11-03
Biegel, Ronald L.
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
7386127, 7386103, 73 116, 364510, G01F 166
Patent
active
058311750
ABSTRACT:
A method for correcting the effect of transducer temperature variations in an ultrasonic flowmeter. The method includes the steps of providing ultrasonic transducers having resonant frequencies that are approximately linear functions of temperature, and applying to those transducers bursts of ultrasonic drive pulses having a frequency that is independent of temperature. The method further includes the steps of calibrating said apparatus at a temperature approximately equal to the nominal temperature if said transducers, and using sample measurements taken at an unknown temperature to define a linear representation of how sample measurements vary during the course of bursts. Finally, the method includes the step of using the linear representation to correct fluid flow values calculated from the sample measurements.
REFERENCES:
patent: 4183244 (1980-01-01), Kohno et al.
patent: 4384491 (1983-05-01), Brown et al.
patent: 4397193 (1983-08-01), Ryan et al.
patent: 4425805 (1984-01-01), Ogura et al.
patent: 4454767 (1984-06-01), Shinkai et al.
patent: 4483202 (1984-11-01), Ogura et al.
patent: 4509373 (1985-04-01), Brown
patent: 4527433 (1985-07-01), Gutterman
patent: 4557148 (1985-12-01), Akiyama
patent: 4616510 (1986-10-01), Moore
patent: 4633719 (1987-01-01), Vander Heyden
patent: 4787252 (1988-11-01), Jacobson et al.
patent: 5035147 (1991-07-01), Woodward
patent: 5052230 (1991-10-01), Lang et al.
patent: 5117698 (1992-06-01), Baumoel
Ultrasonic Measurement of Respiratory Flow, D. Plaut and J. Webster, IEEE Transactions on Biomedical Engin., vol. BME-27, No. 10, Oct. 1980, pp. 549-558.
A Pulsed Phase Measurement Ultrasonic Flowmeter For Medical Gases, A. Kou et al, Annals of Biomedical Engin., vol. 12, 1984, pp. 263-279.
Design and Construction of an Ultrasonic Pneumotachometer, D. Plaut and J. Webster, IEEE Transactions on Biomedical Engin., vol. BME-27, No. 10, Oct. 1980, pp. 590-597.
Biegel Ronald L.
Welch Allyn Inc.
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