Key result
A low-cost FMCW bio-radar system measured respiration rate with 4-4.42% error and heartbeat rate with 13.25-15.16% error at 3.5-5 m distances in a single healthy human subject.
Why the study?
Continuous wave radar lacks range, prompting the development of a low-cost, limited-bandwidth FMCW bio-radar system for vital sign detection.
Can a low-cost, limited bandwidth FMCW bio-radar system accurately measure respiration and heartbeat rates in healthy human subjects at a distance?
Can a low-cost, limited bandwidth FMCW bio-radar system accurately measure respiration and heartbeat rates in healthy human subjects at a distance?
A low-cost FMCW bio-radar system can detect respiration and heartbeat rates at distances of 3.5-5 meters with reasonable accuracy, showing potential for contactless vital sign monitoring.
Feasibility of low-cost FMCW radar for remote vital signs shown; leaves open clinical validation and patient studies.
In this study, a bio-radar system has been constituted using a frequency modulated continuous wave (FMCW) radar with low cost and limited bandwidth, taking into account of the lack of range the continuous wave (CW) radar. The displacement and vibration frequencies have been determined at a distance of 3.5–5 m for single and multiple targets via the help of the target test mechanism. Then, the detection of vital signs has been achieved with healthy human subject measurements. For a single human subject, respiration rate (RR) errors at 3.5 m and 5 m distances are 4% and 4.42%, respectively, and 13.25% and 15.16% for heartbeat rate (HR). In multiple targets measurements, although targets do not create an obstacle to each other, a slight deterioration has been observed in the signals and the error rates increase. The results show that bio-radar have a promising future to replace contact devices in medical applications.
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Şeflek et al. (2022) studied Healthy. FMCW bio-radar system was evaluated on Respiration rate (RR) and heartbeat rate (HR) errors. A low-cost FMCW bio-radar system measured respiration rate with 4-4.42% error and heartbeat rate with 13.25-15.16% error at 3.5-5 m distances in a single healthy human subject.
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