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University of Hawaii

Electrical Engineering

High Accuracy Non-Contact Measurement Techniques for Torso Displacement and Its Application

Date: 2016-05-05           Add to Google Calendar
Time: 2:00 pm - 4:00 pm
Location: Holmes Hall 389
Speaker: Xiaomeng Gao, PhD Graduate Student, UH Manoa


Continuous-wave microwave Doppler radar has been used extensively in physiological monitoring, for wireless detection of respiration rate and heart rate, arterial pulse wave, respiratory tidal volume, sleep apnea, and fall detection. By taking the advantage of its non-contact and non-invasive features, physiological parameters can be assessed without obstructing the integrity of patientís physiological activities as well as providing a continuous vital sign monitoring for event diagnosis. While physiological rates can be accurately estimated using various radar architectures and demodulation methods, a higher precision instrumentation is needed for accurate physiological waveform tracking and torso displacement estimation that may provide stroke volume and pulse pressure information. This work addresses techniques that enable high accuracy displacement measurements by reducing estimation ambiguity resulting from quadrature channel imbalance, limited extent of phase variations for small displacements, and complex chest wall displacement during respiration. In addition, a novel radar-based gesture classification method was proposed.