Chopped passive infrared sensor apparatus and method for stationary and moving occupant detection
US12411046B2 · kind B2 · utility
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17References
19Claims
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Key dates
| Filing date | Jan 11, 2018 |
| Grant date | Sep 9, 2025 |
| Priority date | — |
| Expiry date | Jan 11, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A chopped PIR (C-PIR) sensor is capable of detecting both stationary and moving objects with a high degree of accuracy using a narrow infrared semi-transparent chopper to temporally shutter incident radiation received by pyroelectric sensing elements. Demonstrating a field of view of 110° (horizontal) and 90° (vertical), the C-PIR sensor can detect stationary objects located within 4 m of the sensor, and moving objects located within 8 m of the sensor with 100% accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.