JPS6435485U - - Google Patents
Info
- Publication number
- JPS6435485U JPS6435485U JP12942087U JP12942087U JPS6435485U JP S6435485 U JPS6435485 U JP S6435485U JP 12942087 U JP12942087 U JP 12942087U JP 12942087 U JP12942087 U JP 12942087U JP S6435485 U JPS6435485 U JP S6435485U
- Authority
- JP
- Japan
- Prior art keywords
- light
- emitting element
- circuit
- output
- smoke detector
- 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
- 239000000779 smoke Substances 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Description
第１図は本考案の光電式煙感知器の内部回路の
基本構成図、第２図はその動作を説明するタイム
チヤート、第３図は従来の光電式煙感知器の内部
回路の具体的な構成図、第４図はその動作を説明
するタイムチヤート、第５図は光電式煙感知器の
発光及び受光部の構成図、第６図は従来の光電式
煙感知器の内部回路の基本的構成を示したブロツ
ク図を示している。
符号の説明、１０……発光素子駆動回路、１０
ａ……発光素子、２０……受光信号増幅回路、２
０ａ……受光素子、３０……積分回路、４０……
比較回路、Ｄ……ダイオード。
Fig. 1 is a basic configuration diagram of the internal circuit of the photoelectric smoke detector of the present invention, Fig. 2 is a time chart explaining its operation, and Fig. 3 is a concrete diagram of the internal circuit of the conventional photoelectric smoke detector. Fig. 4 is a time chart explaining its operation; Fig. 5 is a block diagram of the light emitting and light receiving parts of a photoelectric smoke detector; Fig. 6 is a basic diagram of the internal circuit of a conventional photoelectric smoke detector. A block diagram showing the configuration is shown. Explanation of symbols, 10...Light emitting element drive circuit, 10
a... Light emitting element, 20... Light receiving signal amplification circuit, 2
0a... Light receiving element, 30... Integrating circuit, 40...
Comparison circuit, D...diode.
Claims (1)
路と、この発光素子による発光パルスの煙による
散乱光を受光素子で検知し、煙濃度に応じた出力
レベルの電気信号を増幅出力する受光信号増幅回
路と、上記発光素子駆動回路より発光素子の駆動
に同期して送出される積分タイミングパルスによ
り上記受光信号増幅回路の出力信号を積分する積
分回路と、この積分回路の出力信号と基準値とを
比較する比較回路と、この比較回路が上記積分出
力が基準値を越えたと判断したときにスイツチン
グ素子を駆動して発報する光電式煙感知器におい
て、 上記受光信号増幅回路の出力端にダイオードを
付加することにより、該受光信号増幅回路の出力
をダイオードの順方向電圧で制限するように構成
されたことを特徴とする光電式煙感知器。[Claims for Utility Model Registration] A light-emitting element drive circuit that causes a light-emitting element to emit light intermittently, and a light-receiving element that detects light scattered by smoke from the emitted light pulses from the light-emitting element, and an electrical signal with an output level that corresponds to the smoke density. an integrating circuit that integrates the output signal of the received light signal amplification circuit using an integration timing pulse sent out from the light emitting element drive circuit in synchronization with the driving of the light emitting element; A photoelectric smoke detector includes a comparison circuit that compares the output signal with a reference value, and a photoelectric smoke detector that drives a switching element to issue an alarm when the comparison circuit determines that the integrated output exceeds the reference value. 1. A photoelectric smoke detector characterized in that the output of the light-receiving signal amplification circuit is limited by the forward voltage of the diode by adding a diode to the output end of the circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12942087U JPS6435485U (en) | 1987-08-26 | 1987-08-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12942087U JPS6435485U (en) | 1987-08-26 | 1987-08-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6435485U true JPS6435485U (en) | 1989-03-03 |
Family
ID=31383679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12942087U Pending JPS6435485U (en) | 1987-08-26 | 1987-08-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6435485U (en) |
-
1987
- 1987-08-26 JP JP12942087U patent/JPS6435485U/ja active Pending
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