Contactless Human Vital Sign Monitoring System Using Millimeter Wave FMCW Radar for Healthcare Applications

During the COVID-19 pandemic, the need for contactless monitoring of people became very clear. To prevent the spread of the virus, physical interactions were minimized. As a result, many industries, including healthcare, are now focusing on touchless solutions. This research is driven by the need to tackle significant healthcare issues caused by contagious diseases, limited resources, and a shortage of healthcare workers. The paper discusses designing a contactless vital sign monitoring device that uses a 60 GHz FMCW radar and a thermal sensor to track respiratory rate, heart rate, and skin temperature. Heart sufferers and the elderly will benefit most from this device. It is appropriate for usage during sleep and in situations of viral illnesses due to its contactless nature. The device uses a thermal sensor to assess temperature and a 60 GHz radar to track the heart rate and the respiration rate. An Arduino 33 IoT processes data from the radar before sending it to display. For the age group 22 to 25, the device detected the heart rate accuracy of approximately 92.11% and a respiratory rate accuracy of about 89.88%. For the age group 45 to 79, the device shows a heart rate accuracy of around 96.05% and a respiratory rate accuracy of approximately 93.73%. These accuracy rates were determined from 90 data samples from 18 participants, with the accuracy derived from their Mean Absolute Percentage Error (MAPE%) values.