Key result
A contactless on-bed radar system measured respiration-induced body movement with a mean accuracy of 89.6% and estimated respiratory rate with 97.1% accuracy under normal respiratory patterns.
Why the study?
Accurate and robust measurements of respiration motion and respiratory rate estimation in nonhospital facilities remain a challenging task.
Does a contactless on-bed radar system accurately measure respiratory rate and body movement in resting humans?
Does a contactless on-bed radar system accurately measure respiratory rate and body movement in resting humans?
A novel contactless on-bed radar system demonstrates high accuracy for monitoring respiratory rate and breathing motion, offering potential for smart home healthcare automation.
May enable unobtrusive home monitoring; leaves open clinical validation and outcome impact.
Healthcare automation technologies have led to develop “smart” home with intelligent sensing systems to fully monitor vital signs. One important healthcare application of the millimeter-wave radar sensor is the respiratory rate (RR) estimation. Accurate and robust measurements of respiration motion and RR estimation in nonhospital facilities is a challenging task. We present a novel contactless on-bed radar system for respiration monitoring for “smart” home. A simplified trunk model and a mode-decomposition-based respiration reconstruction are designed for analysis of 2-D radar profile to extract nonstationary breathing motion information. Resting breathing experiments with different respiratory patterns and human poses are performed to evaluate the performance of the proposed system. The results show that the system measures respiration-induced body movement with a root-mean-squared error of 0.31 mm and a mean accuracy of 89.6%. For RR estimation, the overall accuracy is 97.1% under normal respiratory patterns and 93.4% under abnormal respiratory patterns.
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Zhai et al. (2022) studied Respiration monitoring. Contactless on-bed radar system was evaluated on Respiration-induced body movement measurement and respiratory rate estimation accuracy. A contactless on-bed radar system measured respiration-induced body movement with a mean accuracy of 89.6% and estimated respiratory rate with 97.1% accuracy under normal respiratory patterns.
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