JPS641261U - - Google Patents
Info
- Publication number
- JPS641261U JPS641261U JP9544187U JP9544187U JPS641261U JP S641261 U JPS641261 U JP S641261U JP 9544187 U JP9544187 U JP 9544187U JP 9544187 U JP9544187 U JP 9544187U JP S641261 U JPS641261 U JP S641261U
- Authority
- JP
- Japan
- Prior art keywords
- output
- comparator
- flame
- input
- amplifier
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Regulation And Control Of Combustion (AREA)
- Control Of Combustion (AREA)
Description
第１図は本考案の一実施例を示す炎検知回路図
、第２図ａ，ｂ，ｃ，ｄはその波形図、第３図は
従来の炎検知回路図、第４図ａ，ｂ，ｃはその波
形図である。
１……マイコン、２……熱電対、３，４……増
幅器、７，１３……コンパレータ、８，９，１０
……抵抗、２１，２２……入力ポート、２８……
出力ポート。
Fig. 1 is a flame detection circuit diagram showing an embodiment of the present invention; Fig. 2 a, b, c, and d are waveform diagrams thereof; Fig. 3 is a conventional flame detection circuit diagram; Fig. 4 a, b, c is its waveform diagram. 1... Microcomputer, 2... Thermocouple, 3, 4... Amplifier, 7, 13... Comparator, 8, 9, 10
...Resistor, 21, 22...Input port, 28...
Output port.
Claims (1)
回路において、制御手段としてマイコン１を有し
、熱電対２の出力に並列に設けた２個の増幅器３
及び増幅器４の各入力を接続し、一方の増幅器４
の出力にコンパレータ１３の入力を接続し、この
コンパレータ１３の出力を炎の有無を表わす信号
として前記マイコン１の入力ポート２２に接続す
ると共に、他方の増幅器３の出力にコンパレータ
７の入力を接続し、コンパレータ７の出力をマイ
コン１の入力ポート２１に接続し、このコンパレ
ータ７の基準電圧側に分圧用抵抗８、抵抗９及び
マイコン１の出力ポート２３に接続されている抵
抗１０を接続し、マイコン１の機能として出力ポ
ート２３からパルスを出力し、コンパレータ７の
基準電圧を変化させて増幅器３の出力信号を２段
のレベルとしてコンパレータ７の出力にし、入力
ポート２１の入力にレベルを設け、炎のレベルを
検知し、入力ポート２２の入力で炎の有無を検知
することを特徴とする炎検知回路。 A flame detection circuit that detects the flame of a combustor using a thermocouple 2 includes a microcomputer 1 as a control means, and two amplifiers 3 installed in parallel with the output of the thermocouple 2.
and each input of amplifier 4 are connected, and one amplifier 4
The input of the comparator 13 is connected to the output of the amplifier 13, and the output of the comparator 13 is connected to the input port 22 of the microcomputer 1 as a signal indicating the presence or absence of flame, and the input of the comparator 7 is connected to the output of the other amplifier 3. , the output of the comparator 7 is connected to the input port 21 of the microcomputer 1, and the voltage dividing resistor 8, the resistor 9, and the resistor 10 connected to the output port 23 of the microcomputer 1 are connected to the reference voltage side of the comparator 7. 1, a pulse is output from the output port 23, the reference voltage of the comparator 7 is changed, the output signal of the amplifier 3 is made into a two-stage level, and the output signal of the comparator 7 is set, a level is set at the input of the input port 21, and the flame is A flame detection circuit is characterized in that it detects the level of flame and detects the presence or absence of flame by inputting the input port 22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9544187U JPS641261U (en) | 1987-06-22 | 1987-06-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9544187U JPS641261U (en) | 1987-06-22 | 1987-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS641261U true JPS641261U (en) | 1989-01-06 |
Family
ID=30959977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9544187U Pending JPS641261U (en) | 1987-06-22 | 1987-06-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS641261U (en) |
-
1987
- 1987-06-22 JP JP9544187U patent/JPS641261U/ja active Pending