JPH03122325U - - Google Patents
Info
- Publication number
- JPH03122325U JPH03122325U JP2985190U JP2985190U JPH03122325U JP H03122325 U JPH03122325 U JP H03122325U JP 2985190 U JP2985190 U JP 2985190U JP 2985190 U JP2985190 U JP 2985190U JP H03122325 U JPH03122325 U JP H03122325U
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- heating resistor
- heat
- detection device
- fluid
- 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
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 4
Description
第１図はこの考案を具体化した流量検出装置の
一実施例を示す回路図、第２図は流量センサ及び
温度センサの構成を示す斜視図、第３図はそのセ
ンサ構成の平面図、第４図ａ及び第４図ｂは第１
図の流量検出装置におけるオペアンプの入力電圧
及び加熱抵抗体の供給電圧の特性図、第５図は従
来の流量検出装置の回路図、第６図ａ及び第６図
ｂはその流量検出装置におけるオペアンプの入力
電圧及び加熱抵抗体の供給電圧の特性図である。
１……流量センサ、５……加熱抵抗体、６……
感熱抵抗体、１０……制御手段としてのソフトス
タート回路。
Fig. 1 is a circuit diagram showing an embodiment of a flow rate detection device embodying this invention, Fig. 2 is a perspective view showing the configuration of a flow rate sensor and a temperature sensor, and Fig. 3 is a plan view of the sensor configuration. Figures 4a and 4b are the first
A characteristic diagram of the input voltage of the operational amplifier and the supply voltage of the heating resistor in the flow rate detection device shown in the figure, Figure 5 is a circuit diagram of the conventional flow rate detection device, and Figures 6a and 6b are the operational amplifiers in the flow rate detection device. FIG. 3 is a characteristic diagram of the input voltage of the heating resistor and the supply voltage of the heating resistor. 1...Flow rate sensor, 5...Heating resistor, 6...
Heat sensitive resistor, 10... Soft start circuit as control means.
Claims (1)
えた流量センサ１を配置し、流体路に流れる流体
の流量に応じて感熱抵抗体６から奪われる熱の伝
達特性を抵抗値の変化で測定し、その測定値に基
づいて加熱抵抗体５への供給電圧を制御して、流
体の流量を検出するようにした流量検出装置にお
いて、 電源の投入時に前記流量センサ１の加熱抵抗体
５に対する供給電圧を徐々に増加させるための制
御手段１０を設けたことを特徴とする流量検出装
置。[Claims for Utility Model Registration] A flow rate sensor 1 having a heating resistor 5 and a heat-sensitive resistor 6 is disposed in a fluid path, and the heat removed from the heat-sensitive resistor 6 is determined according to the flow rate of the fluid flowing in the fluid path. In a flow rate detection device that detects the flow rate of a fluid by measuring the transfer characteristic by a change in resistance value and controlling the voltage supplied to the heating resistor 5 based on the measured value, the flow rate is detected when the power is turned on. A flow rate detection device characterized in that a control means 10 is provided for gradually increasing the voltage supplied to the heating resistor 5 of the sensor 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2985190U JPH03122325U (en) | 1990-03-23 | 1990-03-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2985190U JPH03122325U (en) | 1990-03-23 | 1990-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03122325U true JPH03122325U (en) | 1991-12-13 |
Family
ID=31532596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2985190U Pending JPH03122325U (en) | 1990-03-23 | 1990-03-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03122325U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5866018A (en) * | 1981-10-16 | 1983-04-20 | Hitachi Ltd | Air flowmeter |
-
1990
- 1990-03-23 JP JP2985190U patent/JPH03122325U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5866018A (en) * | 1981-10-16 | 1983-04-20 | Hitachi Ltd | Air flowmeter |
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