Measuring circuit for detecting measurement signals

US5019704A · kind A · utility

Assignee

• BASF SE

Inventors

• Clifton Zimmermann · Karlsruhe, DE
• Heribert Kuerten · Neustadt, DE
• Helmut Lewin · Frankenthal (Pfalz), DE

Key dates

• Filing date: Dec 12, 1989
• Grant date: May 28, 1991
• Expiry date: Dec 12, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R17/02
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A control loop comprising a control section, a set value/actual value comparator and a controller is expanded for ultraprecision measurements in such a way that, to detect measurement signals, the control variable connection between the controller output and the control section input is guided via a measured value transducer and, to evaluate and display the measured value, the correcting variable output of the controller is additionally connected to an evaluating circuit.