Wireless Sensor and Actuator Networks for Lighting Energy ...

Figure 9-26 Light output from the daylight simulating structure.
The solid blues lines in Figure 9-27 and Figure 9-28 show the sensor readings
from the seven desktop-mounted sensors, which correspond with the occupants and
ordered by the level of daylight reception. The occupant numbers associate each
occupant’s location to the circled digits in Figure 9-20. The solid red horizontal lines
and dashed cyan lines in the same plots represent the occupant’s preferred lighting and
the ±5% boundary respectively. All seven sensor readings, especially the ones close to
the daylight simulating structure (plots in Figure 9-27), did fluctuate with the change of
simulated daylight, but were maintained within 5% of occupants’ preferred lighting.
New iterations of lighting optimization were triggered to quickly bring the task
illuminances back to occupants’ preferences once any sensor reading exceeded the 5%
boundary. Like the observations made in the previous two cases, the change of electric
lights was very subtle and nearly unnoticeable in this case.
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