Denso Corporation

Hiroshi Fujitsuka

Tadashi Ozaki

Shinichi Kiribayashi

An occupant protection system is provided. The occupant protection system includes a sensor for detecting an impact at a time of collision, a determination device for determining the collision based on a detection signal of the sensor, and a an occupant state detection device for detecting whether an occupant's posture is maintainable. When the occupant's posture is maintainable after a primary-collision, the determination device determines a secondary-collision by comparing the detection signal of the sensor with a first threshold. When the occupant's posture is not maintainable after the primary collision, the determination device determines the secondary-collision by comparing the detection signal of the sensor with a second threshold smaller than the first threshold.

Occupant protection system

A detecting device ( ) is provided to detect signals from a sensing mat ( ) including a plurality of sensing cells (R) electrically interconnected to each other in a matrix. Each sensing cell (R) is changeable in resistance with a change in a load to be applied. The detecting device ( ) comprises a detecting circuit (Rp) and voltage applying means ( ). The detecting circuit (Rp) detects a signal through a conversion of changes in the resistance to changes in voltage. When detecting a sensing cell (R ) connected to a specified line path ( ), the voltage applying means ( ) applies a particular voltage to the remaining line paths ( ). The particular voltage is for example voltage of which potential is the same as a voltage detected from the selected sensing cell (R ). Applying the particular voltage prevents current from bypassing the other line paths irrelevant to the detection.

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Seto, Japan

Hiroshi Fujitsuka