Apparatus for automatic release of passenger protection devices in the event of an accident
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United States of America Patent
Stats
-
Nov 15, 1988
Grant Date -
N/A
app pub date -
Nov 6, 1987
filing date -
Mar 22, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for the automatic release of passenger protection devices in motor vehicles in the event of an accident has a sensor (35) having a mass (10) secured outside the center of mass (11). This mass (10) generates a comparably high torque in the suspension in the event of both positional change and rotational acceleration. These torques are detected with known measuring methods and split, with the aid of a high-pass filter (36) and a low-pass filter (40), into a high-frequency and a low-frequency portion. The high frequency portion corresponds to the rotational acceleration, from which the rotational velocity is obtained by means of an integrator (38). The low-frequency portion corresponds to the position of the motor vehicle. Thus both measurement variables that must be detected for releasing a roll bar are obtained with a single sensor (35).
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