| 摘要 |
PURPOSE:To correctly judge a collision of a vehicle by obtaining the integration value of the acceleration signal removed with the drift component contained in the acceleration signal from an acceleration sensor. CONSTITUTION:The acceleration signal from an acceleration sensor 1 is stored in the first memory 3 as the acceleration data. The first memory 3 stores the acceleration data for the system clock in the past in sequence. The stored multiple acceleration data are added in an adder 4, and the added integration data are stored in the second memory 5. The second memory 5 has shift registers S0-Sn, and they store integration data for the system clock in the past in sequence. The integration data stored in S0 indicate the integration data in the present measurement period, the integration data stored in Sn indicate the integration data in the previous measurement period, when both of them are subtracted in a subtracter, the integration value of the acceleration signal removed with the drift component can be obtained. |
