发明授权
- 专利标题： Air flow measuring apparatus and method thereof
- 专利标题（中）： 气流测量装置及其方法
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申请号： US766615申请日： 1996-12-13
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公开(公告)号： US5832403A公开(公告)日： 1998-11-03
- 发明人: Takehiko Kowatari , Nobukatsu Arai , Kaoru Uchiyama , Chihiro Kobayashi , Shinya Igarashi
- 申请人： Takehiko Kowatari , Nobukatsu Arai , Kaoru Uchiyama , Chihiro Kobayashi , Shinya Igarashi
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX7-324212 19951213
- 主分类号： G01F1/68
- IPC分类号： G01F1/68 ; F02D41/18 ; F02D45/00 ; G01F1/696 ; G01M15/00
摘要：
A digital signal obtained by A/D converting an output of a thermal type air flow meter is supplied along two paths. After a time constant is obtained in one path, inverse-transformation is performed to obtain an error together with an output of the other path. The inverse-transformed signal is linearized on the basis of the characteristic of the thermal type air flow meter, and a direction of flow is determined.
公开/授权文献
- US5204971A Vehicle sound system 公开/授权日：1993-04-20
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