PIR DETECTORS FOR BUILDING ILLUMINATION AUTOMATION
Pages 194-200
The authors consider the issues of power saving with reference to the engineering systems of buildings. One of the technologies aimed at the improvement of the energy efficiency of buildings contemplates the employment of PIR detectors used for the purpose of automation of building illumination systems. The proposed technology consists of the following two key elements: passive infrared PIR receivers and the Fresnel lens. Passive infrared PIR receivers detect the motion of warm spots against the permanent temperature background. Traditionally, these PIR receivers are incorporated into security systems and automatic switches.The receiver interacts with the external optical system through its Fresnel lens that divides the space into transparent and non-transparent sectors and focuses the infrared beaming on sensitive elements. Whenever a human being enters these sectors, a variable thermal signal is formed.The technology is applicable to design and production of the machinery which power consumption is minimal (for example, the power consumption of one detector is about 0.3 W).
DOI: 10.22227/1997-0935.2013.1.194-200
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