US Patent No. 9,061,639

DEVICE AND METHOD FOR TRIGGERING PASSENGER PROTECTION DEVICES


Patent No. 9,061,639
Issue Date June 23, 2015
Title Device And Method For Triggering Passenger Protection Devices
Inventorship Frank Mack, Seoul (KR)
Gunther Lang, Stuttgart (DE)
Assignee ROBERT BOSCH GMBH, Stuttgart (DE)

Claim of US Patent No. 9,061,639

1. A device for triggering a passenger protection device of a vehicle, wherein the device is configured to be connected to
an accident sensor system which is configured to generate a first signal in response to a single impact event in which an
object impacts the vehicle, the device comprising:
an analyzer circuit adapted to:
derive a second signal from the first signal;
integrate the second signal to obtain a third signal;
determine a first value, which characterizes a combination of values of the second signal over an entirety of a period during
which the second signal lasts, by an absolute summation of particular differences in successive values of the second signal;

determine a second value, which characterizes a combination of values of the third signal over an entirety of a period during
which the third signal lasts, by an absolute summation of particular differences in successive values of the third signal;

determine a frequency of the second signal by forming a quotient of the second values and
trigger the passenger protection device as a function of the determined frequency.