Particle sensor with interferent discrimination
US9752974B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2015 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | May 17, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/075
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention provides methods and devices to measure particle suspension concentrations in the presence of potential interferents. Particle back-scatter readings are taken at light wavelengths that are absorbed by the medium before interacting with surrounding objects. Source-detector spacings are minimized compared to the mean absorbance path length of light, thereby maximizing the range of sensitivity to particle concentration. Discrimination against potentially interfering particles, such as bubbles, is provided by mapping the signal distribution against the central signal value and/or by the use of statistical measures with reduced dependence on outliers. The methods and devices allow accurate particle concentration readings over a wide range of concentration in environments crowded with potentially interfering objects and in the presence of variable concentrations and sizes of potentially interfering particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.