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This study presents an evaluation of an advanced Doppler radar-based method for detection of vital signs, presence, and activity of a human subject in a test room with radar-signal reflecting aluminum-coated surfaces. Ten test subjects lay in four positions, and they sat in two locations in the room, both breathing normally and holding their breath. The mean ratios of the pulse rates determined from...
Demand-controlled ventilation (DCV) can be adjusted based on room occupancy levels. In this study the feasibility of a visitor counting sensor network in occupancy detection was evaluated. A network with 15 sensor spots and real time activity visualization was designed and assembled at the Aalto Design Factory building. Direction sensitive light beam and infrared (IR) camera sensors were used. Counting...
Accurate visitor counting is needed in the research of people flows and people distributions. A case study about the performance of four commercial direction-sensitive over-head camera sensors (Axis and Biodata video camera counters, Sick time-of-flight camera, and Irisys thermographic people counter) in detecting patterns of two and three persons was carried out. Although all the tested sensors except...
The energy efficiency of two escalators of different age was evaluated at a subway station in Helsinki, Finland. For this, the escalators' pedestrian counting data and power consumption data were collected for one week. This was done using an infrared beam pedestrian counting sensor and a power logger, both with automatic data acquisition. The measurement results showed remarkable differences between...
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