Torque sensor with a bridge-circuit of thick film resistors

US6675663B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Jürgen Irion · Pocking, DE
• Arthur Schäfert · Schwalbach, DE
• Bernd Thyzel · Königstein, DE
• Klaus Weber · North Canberra, AU

Key dates

• Filing date: Jun 28, 2001
• Grant date: Jan 13, 2004
• Expiry date: Jun 28, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L3/108
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A mechanical/electrical transducer which has a bridge circuit formed by electrically connecting strain-sensitive thick-film resistors by conductor tracks, the thick-film resistors being arranged directly on a metallic component to be subjected mechanically to torsional loading and lying outside an axis of the component to be loaded which is neutral with respect to bending moments, it being possible to tap an electrical signal corresponding to the strain of the thick-film resistors when the component is subjected to torsion.In a mechanical/electrical transducer in which the electrical signal is tapped with the aid of a bridge circuit and in which the production of a bridge signal due to bending moments or tensile and compressive forces is reliably prevented, in each case at least one thick-film resistor (2; 4) in one arm of the bridge circuit is at the same distance from and at an angle of the same magnitude to the neutral axis (z axis) of the component (1) to be loaded as an opposite thick-film resistor (3; 5) in the second arm of the bridge circuit.