Chopped Passive Infrared Sensor Apparatus and Method for Stationary and Moving Occupant Detection
Additions of multiple different elements to improve current PIR sensors.
Passive infrared (PIR) sensors are used in a variety of applications. They work by using the pyroelectric effect: a change based on the temperature modifies the positions of the atoms. However, because voltage is generated by pyroelectric materials, conventional PIR sensors are unable to detect stationary objects.
In order to detect stationary objects, new sensors would include a sensing element and a Fresnel lens disposed over a surface of a sensing element. Also included is an optical chopper, thus controlled sensing and control circuitry. The new additions to the sensors will allow stationary objects to be detected.
Header image is purely illustrative. Source: Wikimedia/CHG, https://commons.wikimedia.org/wiki/File:Motion_detector.jpg, public domain.
-Able to detect more objects -More accurate sensing with fewer discrepancies
-Detection -Tracking personal identification -Lighting systems -HVAC
Patent application submitted
[WO2018/132546](https://patentscope2.wipo.int/search/en/detail.jsf?docId=WO2018132546)
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