发明授权
- 专利标题： Flow rate sensor implementing a plurality of inner tubes located within a sensor tube
- 专利标题（中）： 流量传感器实现位于传感器管内的多个内管
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申请号： US09451927申请日： 1999-12-01
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公开(公告)号： US06318171B1公开(公告)日： 2001-11-20
- 发明人: Isao Suzuki
- 申请人： Isao Suzuki
- 优先权： JP10-341800 19981201; JP11-172854 19990618
- 主分类号： G01F168
- IPC分类号： G01F168
摘要：
There is provided a flow rate sensor comprising: a pair of heating resistors operable to heat a sensor tube; a temperature sensor operable to control respective temperatures of the heating resistors; and a case operable to hold the heating resistors and the temperature sensor. The flow rate sensor is adapted to detect a flow rate of a fluid flowing in the sensor tube based on variations of voltages applied to the heating resistors, wherein the variations occur according to the flow rate of the fluid. The flow rate sensor further comprises a voltage applying device operable to arbitrarily set an increase in temperature of each of the heating resistors. The sensor tube has opposite ends thereof thermally connected to the case. The temperature sensor is positioned to be equidistant from the opposite ends of the sensor.