Optical particle sensor and sensing method
US10365197B2 · kind B2 · utility
3Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2016 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Jun 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8578
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical particle sensor has at least first and second threshold settings applied to an optical sensor or a sensor signal to obtain first and second optical sensor readings. The first and second optical sensor readings are processed to determine a parameter which is dependent on a type of pollution event. The parameter is used to determine from at least one of the first and second optical sensor readings a mass of all particles below a first particle size. In this way the mass of all particles below a desired size can be evaluated, even though the optical sensor may not be responsive to the smallest particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.