Circuit configuration for recognizing the occupancy of a seat and seatbelt warning in a motor vehicle

US7365549B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Peter Karges · Yokohama, JP
• Michael Krempl · Ergoldsbach, DE
• Hubert Melzl · Pentling, DE
• Gerhard Wild · Frankfurt am Main, DE

Key dates

• Filing date: Jan 12, 2005
• Grant date: Apr 29, 2008
• Expiry date: Jan 12, 2025

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R2021/01184
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A circuit configuration recognizes the occupancy of a seat and triggers a seat belt warning in a motor vehicle. Resistance elements are disposed in a separated and flat manner on a motor vehicle seat, in particular on a sensor seating mat, which alters the resistance values when a force is exerted thereon, for example, perpendicular to the surface of the vehicle seat, or by bending. The weight-sensitive resistance elements contain first resistance elements and additional resistance elements, and the resistance values thereof can be measured in respectively different measuring circuits without the measuring results for the first resistance elements influencing the measuring results for the additional resistance elements.