| 摘要 |
Based on respective output signals (S4, S5, S7, S8) satellite sensors (4, 5) provided in an impact zone of a front section of a vehicle (1); an X-direction sensor (7) that detects an impact acceleration of the vehicle in a traveling direction thereof; a Y-direction sensor (8) that detects an impact acceleration in a direction that is orthogonal to the traveling direction, a control unit (6) that controls the operation of an air bag device (2) includes: a selection output portion that fetches, from among output signals (S40, S50) from the satellite sensors (4, 5) and an output signal (S80) from the Y-direction sensor (8), the output signal with the higher value; and a determination portion (9) that performs a collision determination of the vehicle (1) in response to the output signal (S7) from the X-direction sensor (7). A level of a threshold value used for the collision determination performed by the determination portion (9) is set based on the output signal selected by the selection output portion. In the case that the output signals (S4, S5) from the satellite sensors (4, 5) cannot be obtained, the level of the threshold value used for the collision determination is set based on the output signal (S80) from the Y-direction sensor (8), thereby allowing the operation of the collision determination to be maintained appropriately. |
