Filter functionality is monitored using a sound detector located on the filter housing or a housing attachment. The sound detector is connected to an analysis unit and determines whether the noise signal is outside a predetermined value range.
申请公布号
DE19744990(C1)
申请公布日期
1999.03.04
申请号
DE19971044990
申请日期
1997.10.13
申请人
SIEMENS AG, 80333 MUENCHEN, DE
发明人
EINZMANN, KLAUS, DIPL.-ING. (FH), 91350 GREMSDORF, DE
