JPS6422149U - - Google Patents
Info
- Publication number
- JPS6422149U JPS6422149U JP11727187U JP11727187U JPS6422149U JP S6422149 U JPS6422149 U JP S6422149U JP 11727187 U JP11727187 U JP 11727187U JP 11727187 U JP11727187 U JP 11727187U JP S6422149 U JPS6422149 U JP S6422149U
- Authority
- JP
- Japan
- Prior art keywords
- operational amplifier
- input terminal
- output
- flame
- thermocouple
- 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 3
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- 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図は同熱電対出力、コンパレータ入力特性
図、第３図は従来の炎検知回路である。
２……熱電対、３……演算増幅器、５……抵抗
、６，７……ダイオード、８……コンパレータ。
FIG. 1 is a flame detection circuit diagram showing an embodiment of the present invention, FIG. 2 is a characteristic diagram of the thermocouple output and comparator input characteristics, and FIG. 3 is a conventional flame detection circuit. 2... Thermocouple, 3... Operational amplifier, 5... Resistor, 6, 7... Diode, 8... Comparator.
Claims (1)
、その負電圧を演算増幅器３によつて反転増幅し
、その演算増幅器３の出力をダイオード７を介し
てコンパレータ８にて比較し、炎の有無を判断す
る炎検知回路において、演算増幅器３の反転入力
端子と出力端子間に熱電対２の出力が正となつた
時には短絡する方向のダイオード６を設け、演算
増幅器３の増幅率を決定する抵抗５を演算増幅器
３の反転入力端子とコンパレータ８の入力端子間
に接続したことを特徴とする炎検知回路。 The thermocouple 2 outputs a negative voltage when heated by a flame, the negative voltage is inverted and amplified by an operational amplifier 3, and the output of the operational amplifier 3 is compared by a comparator 8 via a diode 7 to determine the presence or absence of a flame. In the flame detection circuit that determines the amplification factor of the operational amplifier 3, a diode 6 is provided between the inverting input terminal and the output terminal of the operational amplifier 3, which short circuits when the output of the thermocouple 2 becomes positive, and a resistor that determines the amplification factor of the operational amplifier 3 is provided. 5 is connected between the inverting input terminal of the operational amplifier 3 and the input terminal of the comparator 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11727187U JPS6422149U (en) | 1987-07-30 | 1987-07-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11727187U JPS6422149U (en) | 1987-07-30 | 1987-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6422149U true JPS6422149U (en) | 1989-02-03 |
Family
ID=31360584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11727187U Pending JPS6422149U (en) | 1987-07-30 | 1987-07-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6422149U (en) |
-
1987
- 1987-07-30 JP JP11727187U patent/JPS6422149U/ja active Pending