Evaluation for Energy Savings in Occupancy Lighting Control using Vision-based Motion Sensor

Abstract

In this paper, we aim to evaluate an occupancy lighting control by using vision-based motion sensor compared with passive infrared (PIR) motion sensor. Our results showed that vision-based sensor improved detection accuracy by 21.7% and detected small movement of occupant more accurately than PIR sensor. We also confirmed that vision-based sensor enabled to reduce off-delay, which is introduced to prevent undesired switching off light, by 7.92 min (74.8%). As a result of simulation for occupancy lighting control with vision-based sensor and PIR sensor, vision-based sensor enabled to improve energy saving rate by 8.9%. Additionally, we discussed disadvantages of vision-based sensor confirmed in our experiment and considered solutions for them.