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公开(公告)号：EP1547243A4
公开(公告)日：2010-02-24
申请号：EP03797865
申请日：2003-08-27
申请人： ILLINOIS TOOL WORKS
发明人： KNOWLES TERENCE J
CPC分类号： H03K17/96 , H03K2217/96011
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公开(公告)号：EP1642260A4
公开(公告)日：2007-08-08
申请号：EP04754673
申请日：2004-06-02
申请人： ILLINOIS TOOL WORKS
CPC分类号： G06F3/0436 , H01H13/83 , H01H2239/054 , H03K17/96 , H03K2217/96011
摘要： A circuit for an acoustic wave switch or sensor (10) having a resonant acoustic wave cavity detects a touch or sensed event using a time domain approach. The circuit includes a controller that drives an acoustic wave transducer (12, 12’) to generate a resonant acoustic wave in the acoustic wave cavity (14, 14’) during a first portion of a sampling cycle. In a second portion of the sampling cycle, the controller (30) monitors the time that it takes for the acoustic wave signal from the transducer to decay to a predetermined level, based on the decay time, the controller detects a sensed event, such as a touch on the acoustic wave switch/sensor.
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公开(公告)号：EP1644905A4
公开(公告)日：2011-10-26
申请号：EP04776790
申请日：2004-06-16
申请人： ILLINOIS TOOL WORKS
发明人： KNOWLES TERENCE J , KALMUS CHRIS
IPC分类号： G01N29/04 , B64D15/20 , G01M7/00 , G01N29/00 , G01N29/02 , G01N29/22 , G01N29/34 , G01N29/44 , G01W1/00 , G08B20060101 , G08B19/02 , H04B1/02 , H04R17/00
CPC分类号： B64D15/20 , G01N29/11 , G01N29/22 , G01N29/34 , G01N29/4427 , G01N2291/023 , G01N2291/0251 , G01N2291/02827 , G01N2291/0422 , G01N2291/0426 , G01N2291/0427 , G01N2291/044 , G01N2291/105
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公开(公告)号：EP1643913A4
公开(公告)日：2010-10-13
申请号：EP04776791
申请日：2004-06-16
申请人： ILLINOIS TOOL WORKS
发明人： KNOWLES TERENCE J
IPC分类号： H03K17/96
CPC分类号： H03K17/96 , A61B8/485 , H03K2217/96011
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公开(公告)号：EP1924986A4
公开(公告)日：2010-09-22
申请号：EP06788088
申请日：2006-07-21
申请人： ILLINOIS TOOL WORKS
CPC分类号： H03K17/96 , E05Y2400/852 , E05Y2400/86 , H03K2217/96011
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