Patent · US Expired

Impact sensor with a testing circuit for a vehicle

US4950915A · kind A · utility

22Cited by

7References

7Claims

0Family size

Assignee

Messerschmitt Bolkow Blohm GmbH · DE

Inventors

Hans Spies · Brackenheim, DE
Horst Laucht · Bruckmühl, DE
Alfons Woehrl · Schrobenhausen, DE

Key dates

Filing date	Oct 25, 1988
Grant date	Aug 21, 1990
Priority date	—
Expiry date	Oct 25, 2008

Classification

Technology area (CPC G)Physics
CPC primaryG01P21/00
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An impact sensor (1) for a vehicle is connected to a testing circuit. The impact sensor includes an acceleration sensor (5), an evaluating circuit (6) and a trigger circuit (7) for a passive safety device. For simply testing the operability of the impact sensor an electro-acoustic transducer (9) is arranged in a sensor housing (2). The transducer (9) emits a testing signal that is received by the acceleration sensor (5). The electrical signals which are produced by the acceleration sensor are tested by the testing circuit (10) which is part of the evaluating and trigger circuit. The testing is performed with reference to given criteria.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.