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September 5, 2025SensorsOpen Access

The Real-Time Estimation of Respiratory Flow and Mask Leakage in a PAPR Using a Single Differential-Pressure Sensor and Microcontroller-Based Smartphone Interface in the Development of a Public-Oriented Powered Air-Purifying Respirator as an Alternative to Lockdown Measures

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A prototype system estimates respiratory flow and detects mask leakage in PAPRs, suggesting effectiveness against COVID-19.

The system achieved accurate respiratory flow estimation and leak detection using minimal components.
Estimated respiratory flow Q3e closely matched the measured flow Q3m, validating the estimation algorithm.
An automatic leak detection method allows for timely identification of improper wearing of the respirator.
Future applications may include synchronized pressure control and health monitoring leveraging the innovative technology.

Yusaku Fujii (2025) studied this question.

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