JPS63107098U - - Google Patents
Info
- Publication number
- JPS63107098U JPS63107098U JP20003086U JP20003086U JPS63107098U JP S63107098 U JPS63107098 U JP S63107098U JP 20003086 U JP20003086 U JP 20003086U JP 20003086 U JP20003086 U JP 20003086U JP S63107098 U JPS63107098 U JP S63107098U
- Authority
- JP
- Japan
- Prior art keywords
- light
- circuit
- output
- comparison
- fire detection
- 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 3
- 239000000779 smoke Substances 0.000 claims 3
- 238000009825 accumulation Methods 0.000 claims 2
- 230000001960 triggered effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Description
第１図は本考案の一実施例を示した回路図、第
２図は本考案の他の実施例を示した回路図、第３
図は従来例を示した回路図である。
１：定電圧回路、２ａ，２ｂ：端子、３：ダイ
オードブリツジ、６：発振回路、７：発光素子、
８：受光素子、９：受光回路、１０：比較回路、
１１ａ，１１ｂ：Ｄフリツプフロツプ、１２：蓄
積回路、１４：スイツチング回路、１５：ＳＣＲ
、１６，１８：抵抗、１７：コンデンサ、２０：
負荷抵抗、２２：発報表示灯。
Fig. 1 is a circuit diagram showing one embodiment of the invention, Fig. 2 is a circuit diagram showing another embodiment of the invention, and Fig. 3 is a circuit diagram showing another embodiment of the invention.
The figure is a circuit diagram showing a conventional example. 1: constant voltage circuit, 2a, 2b: terminal, 3: diode bridge, 6: oscillation circuit, 7: light emitting element,
8: light receiving element, 9: light receiving circuit, 10: comparison circuit,
11a, 11b: D flip-flop, 12: storage circuit, 14: switching circuit, 15: SCR
, 16, 18: Resistor, 17: Capacitor, 20:
Load resistance, 22: Alarm indicator light.
Claims (1)
子からの光の煙による散乱光を受光する受光素子
と、該受光素子の受光出力が所定の閾値を越えた
ときに出力を生ずる比較回路と、該比較回路の比
較出力を計数し所定時間に予め定めた複数の比較
出力が連続して得られたときに出力するフリツプ
フロツプを備えた蓄積回路と、該蓄積回路の出力
によるトリガで導通して受信機からの電源兼用信
号線に火災検出信号を送出するＳＣＲとを備えた
散乱光式煙感知器の火災検出回路に於いて、 前記ＳＣＲのカソードと接地間に動作電圧を高
める負荷を接続したことを特徴とする散乱光式煙
感知器の火災検出回路。[Claims for Utility Model Registration] A light-emitting element that is driven to emit light intermittently, a light-receiving element that receives light scattered by smoke from the light-emitting element, and a light-receiving output of the light-receiving element exceeding a predetermined threshold. an accumulation circuit that includes a comparison circuit that sometimes produces an output; a flip-flop that counts the comparison outputs of the comparison circuit and outputs an output when a plurality of predetermined comparison outputs are successively obtained at a predetermined time; and the accumulation circuit. In the fire detection circuit of a scattered light smoke detector, which is equipped with an SCR that conducts when triggered by the output of the receiver and sends a fire detection signal to the signal line that also serves as a power supply from the receiver, A fire detection circuit for a scattered light smoke detector, characterized in that a load is connected to increase the operating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20003086U JPS63107098U (en) | 1986-12-26 | 1986-12-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20003086U JPS63107098U (en) | 1986-12-26 | 1986-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63107098U true JPS63107098U (en) | 1988-07-11 |
Family
ID=31162202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20003086U Pending JPS63107098U (en) | 1986-12-26 | 1986-12-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63107098U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03108098A (en) * | 1989-09-21 | 1991-05-08 | Nohmi Bosai Ltd | Fire sensor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5632289B2 (en) * | 1978-05-30 | 1981-07-27 | ||
| JPS58162843A (en) * | 1982-03-23 | 1983-09-27 | Hochiki Corp | Photoelectric type smoke detector |
-
1986
- 1986-12-26 JP JP20003086U patent/JPS63107098U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5632289B2 (en) * | 1978-05-30 | 1981-07-27 | ||
| JPS58162843A (en) * | 1982-03-23 | 1983-09-27 | Hochiki Corp | Photoelectric type smoke detector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03108098A (en) * | 1989-09-21 | 1991-05-08 | Nohmi Bosai Ltd | Fire sensor |
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