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A presence detector and a lighting system

A detector, a technology for detecting signals, applied in the field of lighting systems

Inactive Publication Date: 2013-09-25
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] A disadvantage of known PIR sensors is that they are characterized by relatively limited certainty in detecting the presence of living beings, especially humans or animals

Method used

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  • A presence detector and a lighting system
  • A presence detector and a lighting system
  • A presence detector and a lighting system

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Embodiment Construction

[0020] In the following description of the preferred embodiment, reference is made to the drawings forming a part thereof. The specific embodiments in which the present invention can be practiced are shown in the following description by way of illustration. It should also be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present invention. It should be noted that the same reference numerals will be used to indicate the same or similar parts in several embodiments.

[0021] Fig. 1 schematically shows an equivalent circuit of a thermoelectric element as known in the art. Passive infrared (PIR) sensors as known in the art include two or more pyroelectric elements. These thermoelectric elements are connected in a differential manner, whereby they remove the direct current component of the thermal signal and generate an output signal representing the difference in output of all element elements.

[0022] F...

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Abstract

A detector (1) for detection of a presence of a living being (10) comprises at least one pyroelectric cell (2A; 2B) for detection of the presence of the living being (10) and for producing a corresponding detection signal (6). The detection signal (6) comprises at least one living being'svital signal. The detector comprises a processor unit (8) for concluding the presence of the living being (10) based on the detection signal (6) and on the vital signal. Such detector is characterized with the relative high certainty when detecting the presence of the living being. The invention further relates to a lighting system comprising the above described detector.

Description

Technical field [0001] The invention relates to a detector for detecting the presence of living beings. The detector includes at least one pyroelectric element for detecting the presence of living beings and for generating a corresponding detection signal. The detector includes a processor unit for inferring the existence of a living thing based on the detection signal. The invention further relates to an illumination system including the above-mentioned detector. Background technique [0002] As known in the art, a passive infrared sensor (PIR sensor) is an electronic device that measures infrared (IR) light radiated from an object in its field of view. PIR sensors are often used in the construction of PIR-based motion and / or presence detectors. Motion is detected when an infrared source with one temperature (such as a human) passes in front of an infrared source with another temperature (such as a wall). All objects emit what is called blackbody radiation. What is invisibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B13/191G08B21/22
CPCG08B13/191G08B21/22H05B47/115H05B47/13Y02B20/40G01J5/0025G01J5/34
Inventor G.森尼尼D.A.彻斯塔科夫M.T.约翰逊
Owner KONINK PHILIPS ELECTRONICS NV