Non-contact detection of breathing using a microwave sensor

Area of Science:

• Biomedical Engineering
• Respiratory Physiology

Background:

• Accurate measurement of respiratory tidal volume is crucial for monitoring lung function.
• Non-contact methods offer advantages over traditional invasive or cumbersome techniques.

Purpose of the Study:

• To evaluate a continuous-wave microwave sensor for non-contact, quantitative measurement of respiratory tidal volume.
• To analyze factors affecting sensor performance and develop data processing for reliable measurements.

Main Methods:

• Experimentation with a continuous-wave microwave sensor in seventeen healthy volunteers.
• Analysis of sensor working principles and potential response-affecting factors.
• Development of data processing algorithms to filter unsuitable measurements.

Main Results:

• The study successfully evaluated the microwave sensor for measuring respiratory tidal volume.
• A data processing method was devised to improve measurement reliability.
• A significant relationship was established between microwave sensor readings and actual tidal volume.

Conclusions:

• Continuous-wave microwave sensing is a viable non-contact tool for quantitative tidal volume measurement.
• The developed data processing enhances the accuracy and applicability of the sensor.
• This technology shows promise for non-invasive respiratory monitoring.