An object is identified by an on-board camera and a relative speed of the vehicle and the object is acquired. If the object is a two-wheel vehicle and the relative speed is lower than the vehicle speed, the relative speed is set as a collision speed. If the object is an object other than a two-wheel vehicle, the vehicle speed is set as the collision speed. Using the set collision speed, an effective mass is computed and collision determination is executed.

A collision detection device includes a first acceleration acquisition unit, a second acceleration acquisition unit, and a frontal collision determination unit. The first acceleration acquisition unit acquires longitudinal acceleration output from a left-side sensor and a right-side sensor. The second acceleration acquisition unit acquires the longitudinal acceleration output from a main sensor, which is an acceleration sensor different from the left-side sensor and the right-side sensor. A frontal collision determination unit determines an occurrence of the frontal collision based on a safing determination based on the longitudinal acceleration acquired at the first acceleration acquisition unit and a main determination based on the longitudinal acceleration acquired at the second acceleration acquisition unit.

A method and system for operating restraint devices in a vehicle during a fast roll event or a slow roll event includes a lateral acceleration sensor and an angular rate sensor. When the angular rate and a vertical acceleration of the vehicle predict a vehicle rollover, the system integrates the lateral acceleration from the lateral acceleration sensor to obtain a roll rate velocity. When the lateral acceleration is greater than a fast lateral acceleration threshold and the roll rate velocity is greater than a fast roll rate velocity threshold, the system provides a fast roll event output. When the lateral acceleration is less than the fast lateral acceleration threshold and greater than a slow lateral acceleration threshold while the roll rate velocity is greater than a slow roll rate velocity threshold, the system provides a slow roll event output. The system operates restraint devices based on the roll event.

A method and system for operating restraint devices in a vehicle during a fast roll event or a slow roll event includes a lateral acceleration sensor and an angular rate sensor. When the angular rate and a vertical acceleration of the vehicle predict a vehicle rollover, the system integrates the lateral acceleration from the lateral acceleration sensor to obtain a roll rate velocity. When the lateral acceleration is greater than a fast lateral acceleration threshold and the roll rate velocity is greater than a fast roll rate velocity threshold, the system provides a fast roll event output. When the lateral acceleration is less than the fast lateral acceleration threshold and greater than a slow lateral acceleration threshold while the roll rate velocity is greater than a slow roll rate velocity threshold, the system provides a slow roll event output. The system operates restraint devices based on the roll event.

The information processing device includes: an acquiring unit that acquires vehicle information including an acceleration of a vehicle and a detection time at which the acceleration is detected; a deriving unit that derives an amount of change of the acceleration per unit time using the vehicle information; a setting unit that sets a threshold value of the amount of change corresponding to an interval at which the acceleration is detected using the detection time; and an extracting unit that extracts the vehicle information corresponding to the amount of change as target data when the amount of change is equal to or larger than the threshold value.

A method for detecting impact and activating occupant protection devices, in which at least one acceleration signal from at least one acceleration sensor is compared with a triggering threshold. In this case, at least one environmental sensor for detecting an imminent impact and for determining at least one parameter of this imminent impact, in particular an expected time of impact and severity of impact, is provided. The triggering behavior is adapted on the basis of the parameters of the environmental sensor.

A vehicle, comprising a monitoring unit configured to monitor a surrounding environment of a vehicle body, a detection unit configured to detect an impact applied onto the vehicle body, a plurality of impact absorption units, and an operation control unit configured to selectively operate the plurality of impact absorption units, based on at least one of a monitoring result from the monitoring unit and a detection result from the detection unit.