Title :
Ultrasonic Anemometer for the Measurement of Respiratory Flow in the Forced Oscillation Technique
Author :
Araujo, Guilherme A L ; Junior, Reginardo T L ; Freire, Raimundo C S ; Silva, Ivan S S ; da Silva, J.F. ; Catunda, Yuri S C ; Carvalho, Elyson A N
Author_Institution :
UFPA, Belem
Abstract :
In this paper it is proposed a method to the measurement of respiratory flow in the forced oscillations technique (FOT) using an ultrasonic anemometer. It is used the transit time method and the phase difference technique with the measurements of the phase angle between the signal at the transmission and at the receiver to detect changes in the transit time due to flow. The ultrasonic anemometer implementation is based on a microcontroller. The experimental results of the tests with the comparison among this flowmeter and a classical pneumotachometer used in the FOT for flow measurement will are presented.
Keywords :
anemometers; biomedical measurement; biomedical transducers; biomedical ultrasonics; flow measurement; microcontrollers; pneumodynamics; ultrasonic transducers; International transit time method; classical pneumotachometer; flow measurement; flowmeter; forced oscillation technique; microcontroller; phase angle measurements; phase difference technique; respiratory flow measurement; ultrasonic anemometer; ultrasonic sensors; Circuit testing; Electrical resistance measurement; Fluid flow measurement; Force measurement; Microcontrollers; Phase detection; Phase measurement; Temperature sensors; Time measurement; Ultrasonic variables measurement; Respiratory flow; forced oscillations technique; ultrasonic anemometer;
Conference_Titel :
Medical Measurement and Applications, 2007. MEMEA '07. IEEE International Workshop on
Conference_Location :
Warsaw
Print_ISBN :
1-4244-1080-0
DOI :
10.1109/MEMEA.2007.4285149
