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

fYear

2007

fDate

4-5 May 2007

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Medical Measurement and Applications, 2007. MEMEA '07. IEEE International Workshop on

Conference_Location

Warsaw

Print_ISBN

1-4244-1080-0

Type

conf

DOI

10.1109/MEMEA.2007.4285149

Filename

4285149