Boots – shoes – and leggings
Patent
1996-06-12
1998-05-05
Voeltz, Emanuel T.
Boots, shoes, and leggings
36457102, 36457104, 364509, 364510, 7386128, 73 127, G01F 300
Patent
active
057485046
ABSTRACT:
In a fluid flow measuring apparatus, a flow of fluid is established through the apparatus at a first known flow rate. For each of two states of the apparatus, electrical drive pulses are applied to transmitting transducers. From the output signals of receiving transducers upcount and downcount values are derived which are indicative of the elapsed times between the drive pulses applied to the transmitting transducers and the zero crossings of the output signals of the receiving transducers, with the values being stored in a form that indicates the frequency of occurrence thereof. At least one test is applied to the stored upcount and downcount values to determine if the values have an acceptable distribution and if so using the stored values to determine a first calibration value for the apparatus. Then a flow of fluid is established through the apparatus at a second known flow rate. Again, for each of two states of the apparatus, electrical drive pulses are applied to transmitting transducers. From the output signals of receiving transducers upcount and downcount values are derived which are indicative of the elapsed times between the drive pulses applied to the transmitting transducers and the zero crossings of the output signals of the receiving transducers and from these values a second calibration value for the apparatus is derived. The first and second calibration values are stored for use in calculating unknown flow rates from subsequently measured upcount and downcount values.
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: 4428805 (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), Heyden
patent: 4762012 (1988-08-01), Brown
patent: 4787252 (1988-11-01), Jacobson et al.
patent: 5012449 (1991-04-01), Todd
patent: 5035147 (1991-07-01), Woodward
patent: 5052230 (1991-10-01), Lang et al.
patent: 5117698 (1992-06-01), Baumoel
patent: 5553505 (1996-09-01), Bignell et al.
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 Engine vol. 12, 1984, pp. 263-279. (No date with month).
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.
Voeltz Emanuel T.
Wachsman Hal D.
Welch Allyn Inc.
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