METHOD AND SYSTEM FOR CONTAMINATION REMOVAL FROM A PARTICULATE MATTER SENSOR

A method and system is described for removing contamination from a conductive particulate matter sensor. The sensor has a substrate with two electrodes on the substrate configured to collect particulate matter between the electrodes, thereby establishing an electrically conductive path through colle...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	NELSON CHARLES S, HOCKEN LARY R
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLEANING CLEANING IN GENERAL COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIGHTING MEASURING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICS PREVENTION OF FOULING IN GENERAL TESTING TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A method and system is described for removing contamination from a conductive particulate matter sensor. The sensor has a substrate with two electrodes on the substrate configured to collect particulate matter between the electrodes, thereby establishing an electrically conductive path through collected particulate matter between the electrodes that can be detected by measuring electrical resistance between the electrodes. The method includes heating the sensor to a first temperature for a first duration of time, wherein the first temperature and first time are sufficient to remove collected particulate matter from the sensor. The method further includes heating the sensor to a second temperature for a second duration of time, wherein the second temperature is higher than the first temperature, to remove contaminants that cannot be removed by heating to the first temperature for the first duration of time.