Abstract
In this paper, a textile-based respiratory sensing system is presented. Highly flexible polymeric optical fibres (POFs) that react to applied pressure were integrated into a carrier fabric to form a wearable sensing system. After the evaluation of different optical fibres, different setups were compared. To demonstrate the feasibility of such a wearable sensor, the setup featuring the best performance was placed on the human torso, and thus it was possible to measure the respiratory rate. Furthermore, we show that such a wearable system enables to keep track of the way of breathing (diaphragmatic, upper costal and mixed) when the sensor is placed at different positions of the torso. A comparison of the results with the output of some commercial respiratory measurements devices confirmed the utility of such a monitoring device.
Highlights
The respiratory rate is the frequency of breaths taken within a certain amount of time
We demonstrate the feasibility of a fully textile, fibre optics based respiratory rate sensor
Placing the fibre-based sensor on different areas of the human body showed that depending on the way of breathing, the signal amplitude was different at different positions
Summary
The respiratory rate is the frequency of breaths taken within a certain amount of time. This rate can vary depending on the need for oxygen. The respiratory rate is correlated to the gas composition in the blood, e.g., faster breathing can occur when the oxygen level is low and the carbon dioxide or the carbon oxide level is high. This means that an increased breathing rate can be caused by an increased carbon oxide concentration deriving from an infection [1]. Since the three ways of breathing lead to the expansion of different parts of the human torso, they can be distinguished by measuring the pressure change at different places of the torso
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