JPS6092390U - Fire detector sensitivity switching circuit - Google Patents
Fire detector sensitivity switching circuitInfo
- Publication number
- JPS6092390U JPS6092390U JP14378983U JP14378983U JPS6092390U JP S6092390 U JPS6092390 U JP S6092390U JP 14378983 U JP14378983 U JP 14378983U JP 14378983 U JP14378983 U JP 14378983U JP S6092390 U JPS6092390 U JP S6092390U
- Authority
- JP
- Japan
- Prior art keywords
- fire detector
- sensitivity switching
- switching circuit
- status signal
- output
- 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
Landscapes
- Fire-Detection Mechanisms (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図面は本考案の実施例を示すもので、第１図は結線図、
第２図は要部を示す結線図、第３図は使用状態のブロッ
ク図、第４図は同周波数検出回路部のブロック図、第５
図は同周波数比較回路部の゛ブロック図、第６図は同パ
ルス数検出回路部のブロック図である。
１０・・・検出部、１１・・・集光レンズ、１２・・・
光電変換素子、１３・・・前置増幅器、１６・・・ノツ
チフィルタ、１７・・・ＡＧＣ増幅器、１８・・・−次
遅れ回 −路、１９・・・直流増幅器、２０・・・照
度コンパレータ、２１・・・ウィンドコンパレータ、２
２，２４・・・周波数検出回路、２３．２５・・・ＡＮ
Ｄ回路、２６、・・・時間コンパレータ、６１・・・タ
イマー、６０・・・感度切換リレー、６３・・・感度切
換回路。
３０ａ］
第４図
叔３２−The drawings show an embodiment of the present invention, and Fig. 1 is a wiring diagram;
Figure 2 is a wiring diagram showing the main parts, Figure 3 is a block diagram in use, Figure 4 is a block diagram of the frequency detection circuit, and Figure 5 is a block diagram of the frequency detection circuit.
The figure is a block diagram of the frequency comparison circuit, and FIG. 6 is the block diagram of the pulse number detection circuit. 10... Detection unit, 11... Condensing lens, 12...
Photoelectric conversion element, 13... Preamplifier, 16... Notch filter, 17... AGC amplifier, 18...-Next delay circuit, 19... DC amplifier, 20... Illuminance comparator , 21...window comparator, 2
2, 24...Frequency detection circuit, 23.25...AN
D circuit, 26... Time comparator, 61... Timer, 60... Sensitivity switching relay, 63... Sensitivity switching circuit. 30a] Fig. 4 Uncle 32-
Claims (1)
間の輝き状態の変化を捕える透光窓、光電変換素子、前
置増幅器よりなる検出部を、補正回路を介して設定値の
異なる二つの周波数検出回路に夫々導き、検出部の出力
周波数と振幅と一定時間内のパルス数を演算すると共に
、信号持続時間から火災検出をする火災感知器において
、補正回路となるＡＧＣ増幅とウィンドコンパレータの
間に、状態信号によって作動する感度切換リレーを接続
してなる火災感知器の感度切換回路。 ２ 状態信号が、タイマー出力である実用新案登録請求
の範囲第１項記載の火災感知器の感度切換回路。 ３ 状態信号が、音響出力である実用新案登録請求の範
囲第１項記載の火災感知器の感度切換回路。 ４ 状態信号が、高輝度出力である実用新案登録請求の
範囲第１項記載の火災感知器の感度切換回路。[Scope of Claim for Utility Model Registration] 1. A detection unit consisting of a translucent window, a photoelectric conversion element, and a preamplifier that detects changes in the brightness of a space due to flickering of flames or changes in illuminance due to smoke, etc., through a correction circuit. The AGC serves as a correction circuit in a fire detector that leads to two frequency detection circuits with different set values, calculates the output frequency and amplitude of the detection part, and the number of pulses within a certain time, and also detects fire from the signal duration. A sensitivity switching circuit for a fire detector consisting of a sensitivity switching relay activated by a status signal connected between the amplifier and the window comparator. 2. The sensitivity switching circuit for a fire detector according to claim 1, wherein the status signal is a timer output. 3. The sensitivity switching circuit for a fire detector according to claim 1, wherein the status signal is an acoustic output. 4. The sensitivity switching circuit for a fire detector according to claim 1, wherein the status signal is a high-intensity output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14378983U JPS6092390U (en) | 1983-09-17 | 1983-09-17 | Fire detector sensitivity switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14378983U JPS6092390U (en) | 1983-09-17 | 1983-09-17 | Fire detector sensitivity switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6092390U true JPS6092390U (en) | 1985-06-24 |
Family
ID=30320856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14378983U Pending JPS6092390U (en) | 1983-09-17 | 1983-09-17 | Fire detector sensitivity switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6092390U (en) |
-
1983
- 1983-09-17 JP JP14378983U patent/JPS6092390U/en active Pending
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