JPH01128126U - - Google Patents
Info
- Publication number
- JPH01128126U JPH01128126U JP2333588U JP2333588U JPH01128126U JP H01128126 U JPH01128126 U JP H01128126U JP 2333588 U JP2333588 U JP 2333588U JP 2333588 U JP2333588 U JP 2333588U JP H01128126 U JPH01128126 U JP H01128126U
- Authority
- JP
- Japan
- Prior art keywords
- heat
- terminal voltage
- circuit
- voltage
- sensitive
- 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
- 239000012530 fluid Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Measuring Volume Flow (AREA)
Description
第１図及び第２図はこの考案による感熱式空気
流量センサの回路図及び動作特性図、第３図ａ，
ｂは従来の感熱式空気流量センサの縦断正面図及
び側面図、第４図及び第５図は従来の感熱式空気
流量センサの回路図及び動作特性図である。
１０…制御回路、１１…減算回路、１２…分圧
回路、１３…演算回路、ＲＨ…感熱抵抗体、ＲＣ
…空気温センサ、Ｒ１，Ｒ２…抵抗。
なお、図中同一符号は同一又は相当部分を示す
。
Figures 1 and 2 are the circuit diagram and operating characteristic diagram of the thermal air flow sensor according to this invention, Figure 3a,
b is a longitudinal sectional front view and a side view of a conventional heat-sensitive air flow sensor, and FIGS. 4 and 5 are a circuit diagram and an operating characteristic diagram of the conventional heat-sensitive air flow sensor. 10... Control circuit, 11... Subtraction circuit, 12... Voltage dividing circuit, 13... Arithmetic circuit, RH... Heat sensitive resistor, RC
...Air temperature sensor, R1 , R2 ...Resistance. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
抗とから構成されたブリツジ回路と、感熱抵抗体
への通電々流を制御しブリツジ回路が所定の平衡
状態を保つように制御する制御回路を備え、平衡
状態から流量を検出する感熱式流量センサにおい
て、ブリツジ回路の感熱抵抗体と直列に接続され
た抵抗の端子電圧を入力され、該端子電圧が所定
電圧以上のとき該端子電圧から該所定電圧を減算
して出力する減算回路、上記端子電圧と減算回路
の出力電圧を入力され、該端子電圧から減算回路
出力電圧を減算または両入力電圧を加算する演算
回路を設けたことを特徴とする感熱式流量センサ
。 A bridge circuit consisting of a heat-sensitive resistor and a plurality of resistors disposed in a fluid passage, and a control circuit that controls current flow to the heat-sensitive resistor so that the bridge circuit maintains a predetermined equilibrium state. In a thermal flow sensor that detects the flow rate from an equilibrium state, the terminal voltage of a resistor connected in series with the heat-sensitive resistor of the bridge circuit is input, and when the terminal voltage is equal to or higher than a predetermined voltage, the terminal voltage is A subtraction circuit that subtracts and outputs a predetermined voltage, and an arithmetic circuit that receives the terminal voltage and the output voltage of the subtraction circuit and subtracts the subtraction circuit output voltage from the terminal voltage or adds both input voltages. A heat-sensitive flow sensor.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2333588U JPH01128126U (en) | 1988-02-24 | 1988-02-24 | |
| US07/312,110 US4907446A (en) | 1988-02-24 | 1989-02-21 | Flow sensor incorporating a thermoresistor |
| KR2019890001881U KR920005284Y1 (en) | 1988-02-24 | 1989-02-23 | Thermal flow sensor |
| DE3906344A DE3906344A1 (en) | 1988-02-24 | 1989-02-24 | THERMAL FLOW SENSOR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2333588U JPH01128126U (en) | 1988-02-24 | 1988-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01128126U true JPH01128126U (en) | 1989-09-01 |
Family
ID=31242233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2333588U Pending JPH01128126U (en) | 1988-02-24 | 1988-02-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01128126U (en) |
-
1988
- 1988-02-24 JP JP2333588U patent/JPH01128126U/ja active Pending
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