发明名称 |
Method and apparatus for checking the capacitance of a storage capacitor provided in an occupant protection system |
摘要 |
A capacitance of a firing capacitor for the firing of a firing pellet, where the firing capacitor is contained in an occupant protection system of a motor vehicle, is implemented on a rising edge of a capacitor voltage in a charging phase. For this purpose, a quantity of charge taken up by the storage capacitor during a test time interval is determined by measurement of a charge current or of a corresponding value and integration over the test time interval. The capacitance is obtained through a quotient of the resultant integral and a voltage change in the capacitor voltage that occurred in the test time interval. The functional availability of the firing capacitor is not adversely affected at any time during the testing.
|
申请公布号 |
US6580279(B1) |
申请公布日期 |
2003.06.17 |
申请号 |
US19990323565 |
申请日期 |
1999.06.01 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
BAUMGARTNER WALTER;BAUER KLAUS;HERMANN STEFAN |
分类号 |
B60R21/16;G01R27/26;G01R31/00;G01R31/36;H02J7/34;H02J9/06;(IPC1-7):G01R27/26;B60L1/00 |
主分类号 |
B60R21/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|