4/29/2023 0 Comments Woai doppler radar in motion![]() The detection of human cardiopulmonary motion with Doppler radar could provide a promising approach to overcome false trigger and “dead spot” problems associated with conventional occupancy sensors, which may lead to wider adoption and significant energy and cost savings. Thus, these sensors effectively sense motion, not presence. These drawbacks include high rates of false alarms when no subject is present, and failure to detect stationary subjects. However, currently available occupancy sensors, most commonly passive infrared (PIR) and ultra-sonic (US) sensors, have significant drawbacks which discourage many potential users. Research has shown that occupancy sensors can save up to 80% of energy used for lighting and HVAC systems, which would also result in significant financial savings. In the US, residential and commercial users account for 42% of total energy consumption. With a projected increase in global energy use of 50% by 2035, mainly from fossil fuels, energy efficiency and conservation are becoming increasingly important. Heart and respiratory signals are extracted in order to improve stationary subject detection. Different levels of activity are detected by post-processing sensor signals. The feasibility of true presence is explored with Doppler radar occupancy sensors to overcome the limitations of the common occupancy sensors. ![]() The main drawbacks of currently available occupancy sensors are high rates of false alarm and failure to detect stationary subjects. True Human Presence Detection with Radar Technologyīy Ehsan Yavari, Victor M.
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