Rollover judging device

A rollover judging device comprising:

• an angular velocity sensor for measuring an angular velocity component of a vehicle in a direction of a rollover of the vehicle;
• an acceleration sensor for measuring either of at least an acceleration component of the vehicle in a rightward or leftward direction and an acceleration component of the vehicle in an upward or downward direction;
• an integration processor for adjusting an amount of return used for integral value return-to-zero processing on a basis of the acceleration component measured by said acceleration sensor, for calculating an angle component by integrating with respect to time the angular velocity component measured by said angular velocity sensor, and for carrying out a process of returning an integral value obtained through said time integration to zero using said adjusted amount of return after a lapse of a fixed time interval after the calculation;
• and
• a judging unit for multiplying the angular velocity component measured by said angular velocity sensor and the angle component calculated by said integration processor by preset weighting factors, respectively, and for outputting a signal indicating judgment of occurrence of a rollover when an absolute value of a sum of said components multiplied by the preset weighting factors, respectively, exceeds a preset threshold.

A rollover judging device comprising:

• an angular velocity sensor for measuring an angular velocity component of a vehicle in a direction of a rollover of the vehicle;
• an acceleration sensor for measuring either of at least an acceleration component of the vehicle in a rightward or leftward direction and an acceleration component of the vehicle in an upward or downward direction;
• an integration processor for calculating an angle component by integrating with respect to time the angular velocity component measured by said acceleration sensor, and for adjusting a magnitude of said calculated angle component on a basis of the acceleration component measured by said acceleration sensor, and for outputting said adjusted angle component;
• and
• a judging unit for multiplying the angular velocity component measured by said angular velocity sensor and the angle component calculated by said integration processor by preset weighting factors, respectively, and for outputting a signal indicating judgment of occurrence of a rollover when an absolute value of a sum of said components multiplied by the preset weighting factors, respectively, exceeds a preset threshold.