JPH044392U - - Google Patents
Info
- Publication number
- JPH044392U JPH044392U JP4365590U JP4365590U JPH044392U JP H044392 U JPH044392 U JP H044392U JP 4365590 U JP4365590 U JP 4365590U JP 4365590 U JP4365590 U JP 4365590U JP H044392 U JPH044392 U JP H044392U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- light
- power supply
- supply switch
- light receiving
- 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
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 2
- 238000009825 accumulation Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 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
第１図はこの考案の一実施例を示す光電式煙感
知装置のブロツク線図、第２図は第１図に示す光
電式煙感知装置の回路図、第３図は第２図に示す
光電式煙感知装置の各点の波形を示すグラフ、第
４図は従来の光電式煙感知装置の一例を示す回路
図である。
１……発光回路、２……受光回路、３……増幅
回路、４……蓄積回路、５……電源供給スイツチ
、６……発振回路、７……発光ダイオード、８…
…受光素子、９……ＲＣ遅延回路、１０……ＡＮ
Ｄ回路、１１……ブザー回路、１２……スイツチ
。
Figure 1 is a block diagram of a photoelectric smoke detector showing an embodiment of this invention, Figure 2 is a circuit diagram of the photoelectric smoke detector shown in Figure 1, and Figure 3 is a photoelectric smoke detector shown in Figure 2. FIG. 4 is a graph showing waveforms at various points of the smoke sensing device, and FIG. 4 is a circuit diagram showing an example of a conventional photoelectric smoke sensing device. DESCRIPTION OF SYMBOLS 1...Light emitting circuit, 2...Light receiving circuit, 3...Amplification circuit, 4...Storage circuit, 5...Power supply switch, 6...Oscillation circuit, 7...Light emitting diode, 8...
...Light receiving element, 9...RC delay circuit, 10...AN
D circuit, 11... buzzer circuit, 12... switch.
Claims (1)
路１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２と、受光回路２の出力を増幅する
増幅回路３と、増幅回路３の出力を蓄積して蓄積
量が設定値になるとブザー信号を出力する蓄積回
路４とを備えた煙感知装置において、 発光回路１と、受光回路２と、増幅回路３とに
電力を供給する電源供給スイツチ５と、この電源
供給スイツチ５を一定の周期でオンオフする発振
回路６とを備えており、 発振回路６の出力で電源供給スイツチ５がオン
オフ制御され、電源供給スイツチ５がオンの状態
で、発光回路１と、受光回路２と、増幅回路３と
に電力が供給されるように構成されたことを特徴
とする光電式煙感知装置。[Claims for Utility Model Registration] A light-emitting circuit 1 that emits light into a smoke path, the light emitted from the light-emitting circuit 1 is reflected by fire smoke, and the scattered light is received, and the intensity of the received light is calculated by electrical processing. It includes a light receiving circuit 2 that converts into a signal, an amplifier circuit 3 that amplifies the output of the light receiving circuit 2, and an accumulation circuit 4 that accumulates the output of the amplifier circuit 3 and outputs a buzzer signal when the accumulated amount reaches a set value. The smoke detection device includes a power supply switch 5 that supplies power to a light emitting circuit 1, a light receiving circuit 2, and an amplifier circuit 3, and an oscillation circuit 6 that turns on and off the power supply switch 5 at regular intervals. The power supply switch 5 is controlled on and off by the output of the oscillation circuit 6, and power is supplied to the light emitting circuit 1, the light receiving circuit 2, and the amplifier circuit 3 when the power supply switch 5 is on. A photoelectric smoke detection device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4365590U JPH044392U (en) | 1990-04-23 | 1990-04-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4365590U JPH044392U (en) | 1990-04-23 | 1990-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH044392U true JPH044392U (en) | 1992-01-16 |
Family
ID=31556253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4365590U Pending JPH044392U (en) | 1990-04-23 | 1990-04-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH044392U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145328A (en) * | 1982-02-23 | 1983-08-30 | Asahi Okuma Ind Co Ltd | Raw material cutting device of header |
| JPS6455698A (en) * | 1987-08-26 | 1989-03-02 | Matsushita Electric Works Ltd | Photoelectric smoke sensor |
-
1990
- 1990-04-23 JP JP4365590U patent/JPH044392U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145328A (en) * | 1982-02-23 | 1983-08-30 | Asahi Okuma Ind Co Ltd | Raw material cutting device of header |
| JPS6455698A (en) * | 1987-08-26 | 1989-03-02 | Matsushita Electric Works Ltd | Photoelectric smoke sensor |
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