Integrated capacitive transducer

US4434665A · kind A · utility

Assignee

• Asea Aktiebolag · SE

Inventors

• Morgan Adolfsson · Kinna, SE
• Sture Goransson · Owen, DE
• Bertil Hok · Västerås, SE

Key dates

• Filing date: Jan 27, 1982
• Grant date: Mar 6, 1984
• Expiry date: Jan 27, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G01P15/125
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A capacitive transducer indicates the value of a physical quantity to be measured and is constructed with two spaced electrically conducting plates movable relative to one another in response to a mechanical signal representative of the physical quantity to be measured to generate an electrical signal in response thereto with the transducer capacitor being actuated and de-actuated to be respectively responsive and non-responsive to the mechanical signal in accordance with pre-designated time intervals. The electrical signal in accordance with the capacitance of the transducer capacitor is integrated to provide an output signal when the integrated signal exceeds a reference value.