Device for triggering a passive safety system

US5424583A · kind A · utility

Assignee

• Messerschmitt Bolkow Blohm GmbH · DE

Inventors

• Hans Spies · Brackenheim, DE
• Peter Hora · Schrobenhausen, DE
• Gunter Fendt · Schrobenhausen, DE
• Kenneth Francis
• Helmut Steurer · Gerolsbach, DE

Key dates

• Filing date: May 18, 1992
• Grant date: Jun 13, 1995
• Expiry date: May 18, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R2021/01322
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A device for triggering a passive safety system in a vehicle upon detection of an impact. At least two acceleration sensors, the sensitivity axes of which are aligned for detecting an angle of a frontal impact, are each assigned to a signal channel which, in series with the respective impact sensor, comprises an evaluation circuit, particularly an integrator circuit for its output signals, and a threshold value circuit. During the formation of the speed integral, the physical signal course and the course of the signal edges is evaluated by several logic units in a logical unit (LOG) in order to obtain factors which influence the integration constant of integrators (by multiplication and reduction) to enlarge the area that can be evaluated.