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Elektroniksystem i Umeå AB Industrivägen 12, 90130 Umeå, Sweden
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Grid-Eye
The combination between the infrared temperature sensor and motion detection
sensor determines if the room is occupied or not. The sensor will send three
different values, see examples below.
When the motion (PIR) is triggered, room occupancy is set to 1. If no other
motion is detected within 5 minutes, Grid-Eye captures heat map image. Room
occupancy is set to 2 if heat signatures are detected. If no heat signatures are
detected, room occupancy is set to 0. A new background image is calibrated.
The Grid-Eye heat map image will be postponed 5 minutes after every PIR
motion detection. Room occupancy is set to 1 as long as motion is detected.
Whenever occupancy value is changed, the ERS Eye will schedule transmission
and go into sleep-mode. No triggered transmission will be done as long as
occupancy value remains unchanged. (Periodic transmission will send all values,
including occupancy).
Examples of occupancy values:
•
Occupancy 0: Unoccupied.
•
Occupancy 1: Occupied. Occupancy detected by motion.
•
Occupancy 2: Occupied. Occupancy detected by heat signatures.
Meaning someone is in the room but not moving.
Note: The heat camera will also detect other warm objects (e.g., laptops). Warm objects that
stay at the same place will eventually be calculated into the background image.