| 摘要 |
Apparatus for controlling an electrical load, in particular for the environmental control of a room, such as the control of a lighting system, comprises an occupancy sensor 5 comprising a thermopile array and responsive to the presence of a person within a detection field 13. The apparatus further comprises a movement sensor 6 responsive to the movement of a person within a detection field and a controller arranged to receive detection signals from the occupancy and movement sensors and to generate control signals for the electrical load in response thereto. The controller may be user-programmable and be configured to store data indicative of at least one priority location within the detection field of the occupancy sensor. The controller may be configured subsequently to generate a control signal in response to a detection signal from the occupancy sensor indicative of the detection of a person at the priority location. |
