JPS6413419A - Flow rate sensor - Google Patents
Flow rate sensorInfo
- Publication number
- JPS6413419A JPS6413419A JP62170777A JP17077787A JPS6413419A JP S6413419 A JPS6413419 A JP S6413419A JP 62170777 A JP62170777 A JP 62170777A JP 17077787 A JP17077787 A JP 17077787A JP S6413419 A JPS6413419 A JP S6413419A
- Authority
- JP
- Japan
- Prior art keywords
- output
- heater
- fluid
- sensor
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
PURPOSE:To easily obtain a digital output without using any A/D converter by outputting a pulse signal with pulse width regarding the time required for the temperature variation of a heating body, etc., as flow rate information on fluid to be measured. CONSTITUTION:A heater 2 and a temperature sensor 3 which measures its temperature are arranged in a flow passage 1 and the heater 2 heats or cools the fluid by constant temperature (T2-T1). Then reference voltages V1 and V2 are set to the output voltages of the sensor 3 corresponding to temperatures T1 and T2. When the output A of the sensor 3 exceeds the voltage V2 by the heating of the heater 2, the output C of a comparator 5 rises and the pulse signal D reaches L level, so that the heating is stopped. The heater is cooled by the fluid and when the output A of the sensor 3 decreases below the V1 later, the output of a comparator 4 falls and the signal D reaches H level again, so that heating 2 is restarted. Said operation is repeated. Consequently, a counter 9 counts clock pulses from a clock oscillator 10 for the time of the L level of the signal D and its output becomes digital data regarding the flow rate of the fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62170777A JPS6413419A (en) | 1987-07-08 | 1987-07-08 | Flow rate sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62170777A JPS6413419A (en) | 1987-07-08 | 1987-07-08 | Flow rate sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6413419A true JPS6413419A (en) | 1989-01-18 |
Family
ID=15911182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62170777A Pending JPS6413419A (en) | 1987-07-08 | 1987-07-08 | Flow rate sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6413419A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5153299A (en) * | 1989-09-01 | 1992-10-06 | Sanyo-Kokusaku Pulp Co., Ltd. | Production of novel condensates comprising bisphenols and aromatic aminosulfonic acids, condensates and dispersant, additive and water-reducing agent based thereon |
| US5812427A (en) * | 1995-04-24 | 1998-09-22 | Nippondenso Co., Ltd. | Physical quantity detecting apparatus |
| US6082196A (en) * | 1996-04-26 | 2000-07-04 | Denso Corporation | Physical quantity detecting device |
| JP2008014729A (en) * | 2006-07-04 | 2008-01-24 | Ricoh Co Ltd | Fluid flow velocity measuring instrument |
| JP2014165873A (en) * | 2013-02-27 | 2014-09-08 | Nippon Telegr & Teleph Corp <Ntt> | Digital control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60225028A (en) * | 1984-04-24 | 1985-11-09 | Nippon Soken Inc | Apparatus for measuring flow amount of fluid |
| JPS61164116A (en) * | 1985-01-15 | 1986-07-24 | Nippon Soken Inc | Air flow rate measuring instrument |
| JPS61290322A (en) * | 1985-06-18 | 1986-12-20 | Nippon Denso Co Ltd | Thermal type air flow rate measuring apparatus |
| JPS6255515A (en) * | 1985-09-05 | 1987-03-11 | Nippon Denso Co Ltd | Thermal air flow rate measuring instrument |
| JPS62110123A (en) * | 1985-11-08 | 1987-05-21 | Nippon Denso Co Ltd | Thermal type air flow rate measuring apparatus for engine |
-
1987
- 1987-07-08 JP JP62170777A patent/JPS6413419A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60225028A (en) * | 1984-04-24 | 1985-11-09 | Nippon Soken Inc | Apparatus for measuring flow amount of fluid |
| JPS61164116A (en) * | 1985-01-15 | 1986-07-24 | Nippon Soken Inc | Air flow rate measuring instrument |
| JPS61290322A (en) * | 1985-06-18 | 1986-12-20 | Nippon Denso Co Ltd | Thermal type air flow rate measuring apparatus |
| JPS6255515A (en) * | 1985-09-05 | 1987-03-11 | Nippon Denso Co Ltd | Thermal air flow rate measuring instrument |
| JPS62110123A (en) * | 1985-11-08 | 1987-05-21 | Nippon Denso Co Ltd | Thermal type air flow rate measuring apparatus for engine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5153299A (en) * | 1989-09-01 | 1992-10-06 | Sanyo-Kokusaku Pulp Co., Ltd. | Production of novel condensates comprising bisphenols and aromatic aminosulfonic acids, condensates and dispersant, additive and water-reducing agent based thereon |
| US5812427A (en) * | 1995-04-24 | 1998-09-22 | Nippondenso Co., Ltd. | Physical quantity detecting apparatus |
| US6082196A (en) * | 1996-04-26 | 2000-07-04 | Denso Corporation | Physical quantity detecting device |
| JP2008014729A (en) * | 2006-07-04 | 2008-01-24 | Ricoh Co Ltd | Fluid flow velocity measuring instrument |
| JP2014165873A (en) * | 2013-02-27 | 2014-09-08 | Nippon Telegr & Teleph Corp <Ntt> | Digital control system |
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