JPS62156832U - - Google Patents
Info
- Publication number
- JPS62156832U JPS62156832U JP4388986U JP4388986U JPS62156832U JP S62156832 U JPS62156832 U JP S62156832U JP 4388986 U JP4388986 U JP 4388986U JP 4388986 U JP4388986 U JP 4388986U JP S62156832 U JPS62156832 U JP S62156832U
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- flow rate
- bridge circuit
- sensitive
- measuring device
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Measuring Volume Flow (AREA)
- Details Of Flowmeters (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は非平衡電圧に対する吸入空気流量特性を示す
線図、第３図は従来例を示す回路図である。
１１……Ａ／Ｄ変換器、１２……マイクロコン
ピユータ、ＯＰ……差動増幅器（制御回路用）、
ＯＰ１……差動増幅器（増幅回路用）Ｒ１，Ｒ２
，Ｒ３，ＲＫ……抵抗（ブリツジ回路用）、ＲＨ
……感温抵抗、Ｒ１１，Ｒ１２，Ｒ１３，Ｒ１４
……抵抗（増幅回路用）、Ｔｒ……トランジスタ
、Ｂ……バツテリ。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure is a diagram showing intake air flow rate characteristics with respect to unbalanced voltage, and FIG. 3 is a circuit diagram showing a conventional example. 11...A/D converter, 12...Microcomputer, OP...Differential amplifier (for control circuit),
OP 1 ... Differential amplifier (for amplifier circuit) R 1 , R 2
, R 3 , RK...Resistor (for bridge circuit), RH
...Temperature-sensitive resistance, R 11 , R 12 , R 13 , R 14
...Resistor (for amplifier circuit), Tr...Transistor, B...Battery.
Claims (1)
により形成したブリツジ回路と、前記感温抵抗の
流体流量に応じた抵抗値の変化により変化するブ
リツジ回路の非平衡電圧に基づいてブリツジ回路
への供給電流を制御する制御回路とを備え、前記
供給電流に対応する流体流量を測定すると共に、
ブリツジ回路を形成する各抵抗の抵抗温度係数特
性を周辺温度変化に対してブリツジ回路の非平衡
電圧を略一定に保つように設定してなる感温式流
量測定装置において、前記ブリツジ回路の非平衡
電圧を増幅する回路を設け、該増幅回路の出力電
圧に基づいて流体流量を測定するように構成した
ことを特徴とする感温式流量測定装置。 A bridge circuit is formed by a temperature-sensitive resistor placed in a fluid passage and a plurality of resistors, and an unbalanced voltage of the bridge circuit changes due to a change in the resistance value of the temperature-sensitive resistor according to the fluid flow rate. a control circuit that controls a supply current of the supply current, and measures a fluid flow rate corresponding to the supply current;
In a temperature-sensitive flow rate measuring device in which the resistance temperature coefficient characteristics of each resistor forming a bridge circuit are set so as to keep the unbalanced voltage of the bridge circuit approximately constant against changes in ambient temperature, the unbalanced voltage of the bridge circuit is 1. A temperature-sensitive flow rate measuring device, comprising: a voltage amplifying circuit; and a temperature-sensitive flow rate measuring device configured to measure a fluid flow rate based on the output voltage of the amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4388986U JPH0520979Y2 (en) | 1986-03-27 | 1986-03-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4388986U JPH0520979Y2 (en) | 1986-03-27 | 1986-03-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62156832U true JPS62156832U (en) | 1987-10-05 |
| JPH0520979Y2 JPH0520979Y2 (en) | 1993-05-31 |
Family
ID=30861177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4388986U Expired - Lifetime JPH0520979Y2 (en) | 1986-03-27 | 1986-03-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0520979Y2 (en) |
-
1986
- 1986-03-27 JP JP4388986U patent/JPH0520979Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0520979Y2 (en) | 1993-05-31 |
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