METHOD FOR OPERATING A SENSOR FOR DETECTING PARTICLES IN A MEASUREMENT GAS

The invention relates to a method for operating a sensor (10) for detecting particles, in particular soot particles, in a measurement gas, in particular in the exhaust gas of an internal combustion engine. The sensor (10) comprises a sensor element (12) and an evaluation unit (22), the sensor elemen...

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Bibliographic Details
Main Authors BAARS, Enno, HUBER, Arne, BUCHHOLZ, Martin
Format Patent
LanguageEnglish
French
German
Published 06.09.2023
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:The invention relates to a method for operating a sensor (10) for detecting particles, in particular soot particles, in a measurement gas, in particular in the exhaust gas of an internal combustion engine. The sensor (10) comprises a sensor element (12) and an evaluation unit (22), the sensor element (12) being a laser-induced incandescence sensor element. The method comprises the detection of particles by means of the sensor element (12), determining a particle size distribution (24) by means of the evaluation unit (22) based on a measurement signal of the sensor element (12), which indicates the detected particles, determining a lower measurement limit (30) with respect to a particle size by means of the evaluation unit (22), and extrapolating the particle size distribution (24) below the lower measurement limit (24) by means of the evaluation unit (22).
Bibliography:Application Number: EP20210793884