Collision determining apparatus for a vehicle

A collision determining apparatus for a vehicle, comprising:

• a first acceleration measuring device that measures an acceleration acting on an outer peripheral portion of the vehicle;
• a second acceleration measuring device which measures an acceleration acting on a position further to an inner portion side of the vehicle than the first acceleration measuring device;
• a first change in movement speed calculating device which calculates a first change in movement speed based on the acceleration which is measured by the first acceleration measuring device;
• an interval integral value calculating device which calculates an interval integral value in a predetermined time interval for the acceleration which is measured by the first acceleration measuring device;
• a second change in movement speed calculating device which calculates a second change in movement speed based on the acceleration which is measured by the second acceleration measuring device;
• a first collision determining device which determines whether or not the first change in movement speed exceeds a predetermined first collision determining threshold value;
• a continuation determining device which determines whether or not the interval integral value exceeds a predetermined high side continuation determining threshold value or a predetermined low side continuation determining threshold value;
• a second collision determining device which determines whether or not the second change in movement speed exceeds a predetermined second collision determining threshold value;
• a collision determination continuing device which sets a collision continuation determining value which indicates that a collision is in a state of continuation to an ON state when it is determined by the first collision determining device that the first change in movement speed exceeds the first collision determining threshold value and it is also determined by the continuation determining device that the interval integral value exceeds the predetermined high side continuation determining threshold value, and which sets the collision continuation determining value to an OFF state when it is determined by the continuation determining device that the interval integral value is less than the predetermined low side continuation determining threshold value;
• and
• a control signal generating device which generates a control signal which instructs that an occupant protection apparatus be operated when the collision continuation determining value is in an ON state and it is determined by the second collision determining device that the second change in movement speed exceeds the second collision determining threshold value.