Vibration sensor

US8316715B2 · kind B2 · utility

Assignee

• VEGA Grieshaber KG · DE

Inventors

• Joern Jacob · Kirnbach, DE
• Holger Gruhler · Tuningen, DE
• Josef Fehrenbach · Lenzkirch, DE
• Martin Mellert · Steinach, DE
• Frank Becherer · Lenzkirch, DE

Key dates

• Filing date: Dec 1, 2009
• Grant date: Nov 27, 2012
• Expiry date: Apr 20, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01H11/02
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention is a vibration sensor with a carrying element capable of being set into vibration; a conversion device having a field coil to set and/or tap the carrying element into vibration; an anchor mounted in the field coil; and, a vibration element to transmit the vibrations from the carrying element into/from a surrounding space. The anchor is designed as two parts, having a permanent magnet and a coil core connected to the field coil, with an air gap arranged therebetween and lying in the area of the axial extension of the field coil. The permanent magnet is connected to the carrying element to transmit vibrations; and, the field coil and the permanent magnet are arranged to interact in such a way that any vibration of the permanent magnet induces current flow in the field coil and/or induces vibration of the permanent magnet in the field coil.