Title :
Ultrasonic phase-shift oxygen measuring system
Author :
Hong, HyunDae ; Northrop, Robert B.
Author_Institution :
Bio-Eng. Lab., Connecticut Univ., Storrs, CT, USA
Abstract :
The ultrasonic phase shift due to a change in the total weight of molecules in the propagating medium is utilized to measure the partial concentration of oxygen. A new way to compensate the effect of temperature on the speed of sound is developed to give a reliable and robust measurement system. The developed system had a linearity coefficient of 0.99738 around room temperature (16.64°C) and a maximum error percent rate of 2.32%/°C when temperature changes 5.4°C for 20% oxygen gas. The system developed can be used for diverse applications; measurement of O2 concentration in medical applications, gas chromatography, or sensing diverse mixtures of binary gas
Keywords :
biomedical equipment; biomedical measurement; biomedical ultrasonics; oxygen; ultrasonic equipment; ultrasonic measurement; 16.64 degC; O2; binary gas; gas chromatography; linearity coefficient; maximum error percent rate; medical measurement; molecular weight; propagating medium; room temperature; speed of sound; temperature effect compensation; Acoustic propagation; Biomedical equipment; Gas chromatography; Linearity; Medical services; Phase measurement; Robustness; Temperature sensors; Ultrasonic variables measurement; Velocity measurement;
Conference_Titel :
Bioengineering Conference, 1991., Proceedings of the 1991 IEEE Seventeenth Annual Northeast
Conference_Location :
Hartford, CT
Print_ISBN :
0-7803-0030-0
DOI :
10.1109/NEBC.1991.154577
