| 摘要 |
A collision detection device which can determine in a short time a collision to each portion of a chamber member in the longitudinal direction thereof and which is highly reliable. A collision determination system (10) is provided with: a chamber member (20) which is disposed with the longitudinal direction thereof aligned with the vehicle width direction, has a pressure chamber (22) formed therein, and is provided forward of bumper reinforcement (14); a pair of pressure sensors (24) which is provided to the chamber member (20) at positions spaced from each other in the longitudinal direction thereof and outputs a signal corresponding to a variation in the pressure within the pressure chamber (22); and a collision determination ECU (26). The ECU (26) determines that a collision has occurred if the value of detection by either of the pair of pressure sensors (24) is greater than a first threshold value and, at the same time, the value of detection by the other of the pair is greater than a second threshold value which is set to be greater than the first threshold value.
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