Temperature Sensor Based Ultra Low Cost Respiration Monitoring System

Abstract

Measurement of respiration rate is a vital parameter for adequate health monitoring. An abnormal respiration rate can indicate a variety of pathological conditions like respiratory, cardiovascular and metabolic disorders. We have developed a non-invasive, portable, easy to use and economic respiratory sensor. It measures the temperature difference between inhalation and exhalation phases of respiratory cycle. The difference in temperature has been converted into a digital signal using 8-bit microcontroller (Atmega 328). By analyzing the digital signal, we can detect abnormalities like tachypnea, bradypnea and apnea. To track the unusual or sudden change in respiratory rate a buzzer system has been incorporated with the device. Graphical recordings corresponding to the calculated respiratory rate has been simultaneously obtained for the reference. This device can be used to detect sleeping disorder and abnormal respiration rate.

Existing System

Remote Measurement of Breathing Rate in Real Time Using a High Precision, Single-Point Infrared Temperature Sensor.

Proposed System

This paper presents a novel technique for calculating the respiration rate by monitoring the change in the breathing temperature across the nasal region. The results obtained from our formal experiments are promising. Data from the test set clearly demonstrate that two AD590 temperature sensors combined with a good analog circuit can be used to detect subtle temperature changes corresponding to inhalation and exhalation. The device can also detect complex problem like non uniform breathing rate.

Architecture

Block Diagram of Respiratory Monitoring System