Introducing disturbances to a chopped PIR sensor when investigating the performance in an office environment

Abstract: This master's thesis, conducted in collaboration with Knowit Connectivity, aims to develop a booking device for meeting rooms. The focus of the project is to identify and mitigate disturbances in the C-PIR sensor introduced by Haili Liu et al. The C-PIR is a modified version of a regular motion sensor that allows for both motion and stationary detection. The project's scope involves identifying disturbances to the C-PIR sensor from an office environment and calculating energy consumption savings in scenarios where the booking device is connected to surrounding electronics. The results of this study indicate that other infrared radiating objects (such as computers, phones or hot cups) are a significant source of disturbance to the sensor in an unoccupied scenario, while non-infrared radiating objects (such as tables or chairs) are the primary source of disturbance in an occupied scenario. Additionally, the study found that the energy consumption savings for an average-sized meeting room were 0.23 kWh for a one-hour meeting. Overall, this research provides valuable insights into the use of C-PIR sensors for meeting room booking devices, and the results have important implications for designing more efficient and accurate meeting room booking systems.