发明授权
US08779337B2 Thermal type flow sensor having bridge circuit and adjustment circuit
有权
具有桥式电路和调节电路的热式流量传感器
- 专利标题： Thermal type flow sensor having bridge circuit and adjustment circuit
- 专利标题（中）： 具有桥式电路和调节电路的热式流量传感器
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申请号： US13542426申请日： 2012-07-05
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公开(公告)号： US08779337B2公开(公告)日： 2014-07-15
- 发明人: Hiroshi Nakano , Masamichi Yamada , Masahiro Matsumoto , Izumi Watanabe
- 申请人： Hiroshi Nakano , Masamichi Yamada , Masahiro Matsumoto , Izumi Watanabe
- 申请人地址： JP Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Brundidge & Stanger, P.C.
- 优先权： JP2006-027221 20060203
- 主分类号： B23K10/00
- IPC分类号： B23K10/00
摘要：
A thermal type flow sensor measures a flow rate of a fluid by means of a heat resistive element having a temperature dependency. The sensor is comprised of: plural heat resistive elements used for a flow rate measurement; and a driver circuit for controlling a current applied to these heat resistive elements to cause their heating. The driver circuit is configured to sense a resistance change of a lower-temperature side heat resistive element among the plural heat resistive elements and to control the current to be applied to the plural heat resistive elements in accordance with a sensed value of the lower-resistance's variation.
公开/授权文献
- US20120279294A1 THERMAL TYPE FLOW SENSOR 公开/授权日：2012-11-08
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