Occupancy sensor

Types of Occupancy Sensors
– PIR sensors detect heat difference
– Environmental sensors detect changes in temperature, humidity, and CO
– Ultrasonic sensors work on the doppler shift principle
– Microwave sensors also work on the doppler shift principle
– Keycard light slots detect occupancy in hotel rooms

Benefits and Features of Occupancy Sensors
– Saves energy by turning off lights when no motion is detected
– Some occupancy sensors can classify the number of occupants and their direction of motion
– Pixelview is a camera-based occupancy sensor
– Presence sensors or vacancy sensors are alternative names for occupancy sensors

System Design and Components of Occupancy Sensors
– Occupancy sensors use infrared, ultrasonic, tomographic motion detection, microwave sensors, or camera-based sensors
– Sensor field of view should be carefully selected/adjusted
– Delay time is incorporated before switching lights
– Sophisticated systems with dimming technology reduce lighting slowly
– Some systems require occupants to switch lights on when re-entering

Related Concepts and Technologies
– Proximity sensor
– Human sensing
– Smart meters for presence detection
– Discrete room pressure drops for predicting door openings
– Technology comparison of occupancy sensors
– Motion detection with PIR and Arduino

Applications and Categories of Occupancy Sensors
– Occupancy sensors fall under the categories of electrical power control and energy-saving lighting
– The use of occupancy sensors contributes to efficient electrical power control
– Occupancy sensors also play a role in energy-saving lighting systems
– The different categories of occupancy sensors cater to specific needs and applications
– Implementing occupancy sensors from the relevant categories can lead to energy savings and improved controlSources: https://en.wikipedia.org/wiki/Occupancy_sensor