Formulation of the Model for Measuring Temperature Change in a Mask during Exhalation and Inhalation by Piezoelectric Ceramics and Proposal of Pulmonary Function Evaluation System

Abstract

Chronic obstructive pulmonary disease (COPD) has been attracting attention as a respiratory disease that should be prevented because both the number of patients with COPD and the number of deaths associated with COPD are increasing, and a method that can help diagnosis in the home environment is desired. Therefore, this study introduces a mask-type device that piezoelectric ceramics installed in the mask and constructs a model considering the physical relationship between human respiration and the voltage measured through the piezoelectric ceramics. Furthermore, by applying signal processing based on this model, we will attempt to realize a pulmonary function evaluation system that estimates FEV_1.0%, which is used as an index for detecting obstructive disorders.