| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To perform 0-point correction corresponding to both a long-time and smooth 0-point change caused by aging and a relatively short-time 0-point change caused by a temperature change or loading onto a vehicle. <P>SOLUTION: A long-term correction amount and a short-term correction amount are totaled to arithmetically operate a post-arbitration correction amountΔGx, and the post-arbitration correction amountΔGx is subtracted from a pre-correction acceleration Gx0 indicated by an output value of a G sensor 2 to arithmetically operate a G sensor value Gx after 0-point correction. The long-term correction amount is determined by extracting a long-time 0-point change by applying low-pass filtering to the output value of the G sensor 2 through short-term correction processing. Furthermore, the short-term correction amount is determined through short-term correction processing of applying filtering of a shorter cycle than that of the long-term correction processing. Moreover, a dead zone is provided in the short-term correction amount, a portion exceeding a range of that dead zone is extracted and it is defined as a final short-term correction amount to correct the short-time 0-point change in the output value of the G sensor 2. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
