Practical design of flow meter for mechanical ventilation equipment
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Date
2021-04-01
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Abstract
This paper introduces a practical technique for the
design of an instrument used in air flow measurement
or flowmeter. This instrument is an essential
component in the hospital medical ventilation
equipment functioning, therefore, the parameters
design presented in this article focus on this purpose.
However, this instrument can be employed to any
measurement scale. The technique is based on
indirect flow measurement, using a sensor that
converts the flow parameter into a differential
pressure measurement. An electronic transducer
allows the differential pressure values to be obtained
as an electrical signal, which is then digitized and
analyzed to obtain the original parameter. The
experimental procedure presented in this paper
utilizes a computational algorithm to perform the
signal analysis; however, given the simplicity of the
procedure, this could be adapted to any digital
processing card or platform, to show the
measurement obtained immediately. Preliminary
analyses demonstrated instrument efficiency with
sensitivity of 0.0681 liters per second (L/s). Accuracy
evaluation showed an average measurement error
lesser than 1.4%, with a standard deviation of 0.0612
and normal distribution over the set of test
measurements.
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Keywords
Medición de flujo de aire, Instrumentación médica, Tubo Venturi, Equipo de ventilación médica.
Citation
Journal of Computer Science & Technology
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