JPS5978926U - Heat ray protection device for hot wire air flow meter - Google Patents
Heat ray protection device for hot wire air flow meterInfo
- Publication number
- JPS5978926U JPS5978926U JP17353182U JP17353182U JPS5978926U JP S5978926 U JPS5978926 U JP S5978926U JP 17353182 U JP17353182 U JP 17353182U JP 17353182 U JP17353182 U JP 17353182U JP S5978926 U JPS5978926 U JP S5978926U
- Authority
- JP
- Japan
- Prior art keywords
- air flow
- hot wire
- protection device
- flow meter
- heat ray
- 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
- Details Of Flowmeters (AREA)
- Measuring Volume Flow (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の熱線式エアフローメータの一例を示す回
路図、第２図は本考案の一実施例を示す回路図である。
Ｒ，４・・・熱線、Ｒｋ、 Ｒ１，Ｒ２，Ｒ３，Ｒ，・
・・抵抗、Ｏｐ・・・差動増幅器、Ｔｒ・・・トランジ
スタ、Ｂ・・・バッテリ、Ｚ・・・ツェナーダイオード
。FIG. 1 is a circuit diagram showing an example of a conventional hot wire air flow meter, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. R, 4...heat ray, Rk, R1, R2, R3, R,...
...Resistor, Op...Differential amplifier, Tr...Transistor, B...Battery, Z...Zener diode.
Claims (1)
路を形成し、熱線の空気流量に応じた抵抗値変化に伴な
ってブリッヂ回路への供給電流を制御することにより、
空気流量を測定するように構成された熱線式エアフロー
メータにおいて、前記ブリッヂ回路と並列にツェナーダ
イオードを接続して設けたことを特徴とする熱線式エア
フローメータの熱線保護装置。By forming a bridge circuit with a hot wire placed in the air circulation passage and a resistor, and controlling the current supplied to the bridge circuit as the resistance value of the hot wire changes according to the air flow rate,
1. A heat ray protection device for a hot wire air flow meter configured to measure air flow rate, characterized in that a Zener diode is connected in parallel with the bridge circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17353182U JPS5978926U (en) | 1982-11-18 | 1982-11-18 | Heat ray protection device for hot wire air flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17353182U JPS5978926U (en) | 1982-11-18 | 1982-11-18 | Heat ray protection device for hot wire air flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5978926U true JPS5978926U (en) | 1984-05-28 |
Family
ID=30378005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17353182U Pending JPS5978926U (en) | 1982-11-18 | 1982-11-18 | Heat ray protection device for hot wire air flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5978926U (en) |
-
1982
- 1982-11-18 JP JP17353182U patent/JPS5978926U/en active Pending
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