JPH0455697U - - Google Patents
Info
- Publication number
- JPH0455697U JPH0455697U JP9693990U JP9693990U JPH0455697U JP H0455697 U JPH0455697 U JP H0455697U JP 9693990 U JP9693990 U JP 9693990U JP 9693990 U JP9693990 U JP 9693990U JP H0455697 U JPH0455697 U JP H0455697U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- light emitting
- retrigger
- photodetector
- 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 6
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 claims 2
- 230000003321 amplification Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Description
図面は本考案煙感知器であつて、第１図はブロ
ツク線図、第２図は第１図における煙感知器の各
点の波形を示すグラフである。
１……発光回路、２……発振時定数回路、３…
…受光回路、４……増幅回路、５……比較回路、
６……蓄積回路、７……ブザー回路、８……第１
のリトリガー、９……第２のリトリガー、１０，
１１……時定数回路。
The drawings show the smoke detector of the present invention; FIG. 1 is a block diagram, and FIG. 2 is a graph showing waveforms at various points of the smoke detector in FIG. 1. 1... Light emitting circuit, 2... Oscillation time constant circuit, 3...
...Light receiving circuit, 4...Amplification circuit, 5...Comparison circuit,
6...Storage circuit, 7...Buzzer circuit, 8...First
retrigger, 9...second retrigger, 10,
11...Time constant circuit.
Claims (1)
光周期を決定する発振時定数回路と、前記発光回
路から出た光が火災の煙で反射されてその散乱光
を受光し、受光した光の強度を電気信号に変換す
る受光回路と、受光回路の出力を増幅する増幅回
路と、増幅回路の出力を蓄積する蓄積回路と、蓄
積回路の出力によりブザー音を発生するブザー回
路とより成る光電式煙感知器において、前記蓄積
回路は第１のリトリガーと、第２のリトリガーと
を備え、第１及び第２のリトリガーは夫々前記発
光周期よりも少なくとも２倍以上長い期間出力を
保持する時定数回路を備えたことを特徴とする光
電式煙感知器。 A light emitting circuit that emits light in the path of smoke, an oscillation time constant circuit that determines the light emitting cycle of the light emitting circuit, and the light emitted from the light emitting circuit is reflected by fire smoke and receives the scattered light. A photovoltaic device consisting of a photodetector circuit that converts the intensity of the photodetector into an electrical signal, an amplifier circuit that amplifies the output of the photodetector circuit, an accumulation circuit that accumulates the output of the amplifier circuit, and a buzzer circuit that generates a buzzer sound based on the output of the accumulation circuit. In the type smoke detector, the storage circuit includes a first retrigger and a second retrigger, each of the first and second retrigger having a time constant that maintains an output for a period at least twice as long as the emission period. A photoelectric smoke detector characterized by being equipped with a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9693990U JPH0455697U (en) | 1990-09-13 | 1990-09-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9693990U JPH0455697U (en) | 1990-09-13 | 1990-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0455697U true JPH0455697U (en) | 1992-05-13 |
Family
ID=31836891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9693990U Pending JPH0455697U (en) | 1990-09-13 | 1990-09-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0455697U (en) |
-
1990
- 1990-09-13 JP JP9693990U patent/JPH0455697U/ja active Pending
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