Sensor system with adjustment for ambient conditions

US5225669A · kind A · utility

Assignee

• Telefunken Electronic GmbH · DE

Inventors

• Gunter Hasch · Heilbronn, DE
• Helmut Moser · Reinach, CH

Key dates

• Filing date: Oct 8, 1991
• Grant date: Jul 6, 1993
• Expiry date: Oct 8, 2011

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/486
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor system for recording the ambient conditions of an optical sensor having a transmitter unit and a receiver unit linked by an optical gap. An electronic sensor unit is provided that predetermines a basic setting of the optical sensor independent of the ambient conditions. The electronic sensor unit contains a signal processing section with comparators for comparing a reception signal of the optical sensor with threshold values corresponding to certain ambient conditions. The electronic sensor unit recognizes and evaluates changes in the ambient conditions as a function of the comparing, and restores the basic setting of the optical sensor such that the sensor system dependably reacts to subsequent changes in the ambient conditions.