Patent · US Active

Method and device for determining the quality of measurement results of a scattered light meter

US8873052B2 · kind B2 · utility

1Cited by

4References

18Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Karl Stengel · Deizisau, DE
Gerhard Haaga · Owen, DE
Michael Neuendorf · Plochingen, DE
Raymond Sieg · Eßlingen, DE

Key dates

Filing date	Jan 3, 2011
Grant date	Oct 28, 2014
Priority date	—
Expiry date	Mar 19, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG01N2021/513
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for determining the quality of the measuring results of a scattered light meter for measuring the particle concentration in motor vehicle exhaust gases, which has at least one scattered light measuring chamber, at least one light source and at least one light sensor, includes the steps: determining the difference between two scattered light sensor signals, that were picked up in a reference state of the scattered light meter; determining the difference between two scattered light sensor signals, which were picked up in a used state of the scattered light meter; and comparing the difference of the signals picked up in the used state to the reference signal difference of the signals picked up in the reference state.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.