Method and device for automatic cleaning of opto-electronic sensor systems for substance analysis

US6458213B1 · kind B1 · utility

Assignee

• Gunther Krieg · DE

Inventors

• Gunther Krieg · Karlsruhe, DE
• Karl Koukolitschek · Karlsruhe, DE
• Wilfried Maier · Eppingen, DE

Key dates

• Filing date: Apr 14, 2000
• Grant date: Oct 1, 2002
• Expiry date: Apr 14, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/59
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention concerns a method and device for automatic cleaning of opto-electronic measuring systems used in process-technology for the analysis of substances in liquids and gases by means of optical absorption and fluorescence. The method is characterized in that the soiling degree is detected by the opto-electronic sensor system itself and, with predetermined soiling degree, a cleaning liquid cleans the soiling-sensitive optical components and detects the residual soiling, which is then evaluated quantitatively and compensated for in the signal analysis.