Abstract:
The present invention relates to a lighting system(10) arranged to control a light intensity and a color temperature of light in a room(1). The lighting system comprising: a light source(12) arranged to emit light, the light source(12) comprising a first and second light emitters(13, 14) each being adjustable between a number of light intensity levels and arranged to emit light having a first and second color temperature,respectively. The light source(12) is arranged to provide an output signal(OS) comprising information pertaining to a light intensity level of said first and second light emitters(13, 14), respectively; a light sensor(16) arranged to measure the light intensity and the color temperature of the light in the room, and to provide a sense signal(SS) comprising information pertaining to the measured light intensity and color temperature; and a controller(18) arranged to control the color temperature and the light intensity of the light in the room(1)by adjusting the light intensity level of said first and second light emitters(13, 14), based on said sense signal(SS) provided by the light sensor(16)and said output signal(OS)provided by the light source(12).
Abstract:
The invention relates to a lighting system (100) and a method for controlling lighting conditions in a room (R). The lighting system (100) comprises a controller (101) for controlling internal light sources (121, 122) and at least one actuator (131, 141) for changing the amount of external light entering the room (R). Moreover, at least one sensor (111,112, 31,141) is provided for detecting a parameter relating to the actual or to a desired lighting level of the room (R). Thus it is possible to control the lighting of the room (R) according to a predetermined schedule, particularly with a circadian rhythm that can reduce delirium in a patient (P). The actuator may for example comprise means (141) for closing or opening curtains (142) in front of a window (W).
Abstract:
The invention suggests a system for monitoring the exposure of a patient (1) to at least one environmental factor. The system particularly comprises a database (8) storing an environmental prescription for the patient, the environmental prescription specifying a maximum level of the environmental factor and a minimum duration for the level of the environmental factor to be smaller than the maximum level, and an evaluation module (7) configured to detect on the basis of a measurement signal and the stored environmental prescription a time interval in which a level of the environmental factor is below the maximum level and to compare the duration of the detected time interval with the minimum duration. On the basis of the result of this comparison, healthcare staff can plan activities in such a way that the patient is provided with a rest period substantially having the minimum duration.
Abstract:
An insect control system has a light source arrangement (10) comprising one or more light sources with tuneable spectrum, polarization, intensity and or flickering pattern. The system enables a particular type of insect to be attracted or repelled in a particular time period.
Abstract:
The present invention relates generally to the field of occupancy detection, and more particularly to an occupancy detection system and a corresponding method suitable for a presence controlled system. A method and system for determining occupancy of a room is provided, in which a signal from a movement sensor positioned in the room is analyzed to detect variations in the signal which correspond to movements of an occupant of the room. The room is determined to be empty if in the received signal a leave pattern is identified. The leave pattern is a predetermined pattern which has been associated with an occupant leaving the room. The method and system provide reliable occupancy detection in more or less static environments like for instance offices, and when utilized in for instance a presence controlled lighting system, the number of frustrating erroneous "switch-off" events of the light in a situation where a room is still occupied by occupants involved in relative still/static activities is then decreased.