Control system for passenger protecting apparatus

A control system for a passenger protecting apparatus, comprising:

• means for detecting vehicle deceleration values;
• means for calculating a sum total of squares of differences between the detected deceleration values and an averaged deceleration value obtained within a predetermined time period, on the basis of the detected deceleration values;
• means for deciding whether or not the passenger protecting apparatus is to be activated on the basis of the calculated sum total value;
• and
• drive and control means for activating the passenger protecting apparatus when said deciding means decides the activation of the passenger protecting apparatus.

A method of activating a passenger protecting apparatus, comprising the steps of:

• detecting vehicle deceleration values g at sampling times;
• detecting vehicle collision on the basis of the detected deceleration values;
• calculating deceleration status Bu by the steps of:
• calculating a sum total value L1 of deceleration values detected at previous sampling times;
• calculating an average deceleration value L on the basis of the calculated sum total deceleration value L1 and the current number N of samples;
• calculating a sum total value S of squares of differences between the calculated averaged deceleration value L and respective detected deceleration values g;
• and
• calculating a deceleration dispersion value Bu on the basis of the calculated sum total value S and the number T of samples;
• comparing the calculated deceleration dispersion value Bu with a predetermined threshold value THL;
• and
• if the calculated deceleration dispersion value Bu exceeds the threshold THL, activating the passenger protecting apparatus.

A method of activating a passenger protecting apparatus, comprising the steps of:

• detecting vehicle deceleration values g at sampling times;
• detecting vehicle collision on the basis of the detected deceleration values;
• calculating deceleration status as a dispersion value of the deceleration values by the steps of:
• calculating a sum total value L1 of deceleration values detected at previous sampling times;
• calculating an average deceleration value L on the basis of the calculated sum total deceleration value L1 and current number of samples N;
• and
• calculating a deceleration dispersion value as a sum total value Bu1 of squares of differences between the calculated average deceleration value L and respective detected deceleration values g;
• and
• comparing the calculated deceleration dispersion value Bu1 with a predetermined threshold value THL1;
• and
• if the calculated deceleration dispersion value Bu1 exceeds the threshold THL1, activating the passenger protecting apparatus.

A method of activating a passenger protecting apparatus, comprising the steps of:

• detecting vehicle deceleration values g at sampling times;
• detecting vehicle collision on the basis of the detected deceleration values;
• calculating deceleration status by the steps of:
• calculating a sum total value L1 of deceleration values detected at previous sampling times;
• calculating an average deceleration value L on the basis of the calculated sum total deceleration value L1 and a current number of samples N;
• calculating a sum total value S of squares of differences between the calculated averaged deceleration value L and respective detected deceleration values g;
• and
• calculating a deceleration dispersion value as an integration value Bu2 of the calculated sum total values S with respect to time;
• comparing the calculated deceleration dispersion value Bu2 with a predetermined threshold value THL2;
• and
• if the calculated deceleration dispersion value Bu2 exceeds the threshold THL2, activating the passenger protecting apparatus.

A control system for activating a passenger protecting apparatus on the basis of vehicle deceleration values detected in case of collision, comprising:

• means for detecting the vehicle deceleration values;
• means for calculating a dispersion-based value of the detected vehicle deceleration values;
• means for judging whether the dispersion-based value outputted by said calculating means exceeds a threshold value;
• and
• means responsive to said judging means for activating the passenger protecting apparatus when the dispersion-based value is judged by said judging means to exceed the threshold value.