JPS5894091U - Dimming smoke detector - Google Patents
Dimming smoke detectorInfo
- Publication number
- JPS5894091U JPS5894091U JP18805081U JP18805081U JPS5894091U JP S5894091 U JPS5894091 U JP S5894091U JP 18805081 U JP18805081 U JP 18805081U JP 18805081 U JP18805081 U JP 18805081U JP S5894091 U JPS5894091 U JP S5894091U
- Authority
- JP
- Japan
- Prior art keywords
- light
- smoke detector
- receiving element
- output
- effect transistor
- 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.)
- Granted
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- 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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はこの考案の減光式煙感知器の一実施例の回路図
、第２図は第１図の回路図の平常時と火災時におりる各
所の波形図、第３図は第１図の平常時と受光出力調整時
における各所の波形図である。
２・・・・・・発光素子、４・・・・・・受光素子、５
・・・・・・増幅器、８・・・・・・記憶面路、Ｄ４・
・・・・・ダイオード、Ｃ３・・・・・・コンデンサ、
Ｔ４・・・・・・接合型電界効果トランジスタ。Figure 1 is a circuit diagram of one embodiment of the dimming type smoke detector of this invention, Figure 2 is a waveform diagram of various parts of the circuit diagram of Figure 1 during normal times and during a fire, and Figure 3 is a diagram of the waveforms of the circuit diagram of Figure 1. FIG. 6 is a waveform chart at various points in the figure during normal times and when adjusting the received light output. 2... Light emitting element, 4... Light receiving element, 5
...Amplifier, 8...Memory plane path, D4.
...Diode, C3...Capacitor,
T4... Junction field effect transistor.
Claims (1)
、画素子間に煙が進入し減衰された受光素子への光の強
さとを比較して火災と判断する減光式煙感知器において
、平常時の受光素子の出力または増幅器の出力を記憶す
る記憶回路をダイオードを通じて充電されるコンデンサ
と、この電荷をゲートとソースを通じて放電させる接合
型の電界効果トランジスタとで構成し、かつ上記電界効
果トランジスタのドレインが受光出力調整時に開かれる
接点を通じて電源に接続されたことを特徴とする減光式
煙感知器。A dimming type smoke detector that determines a fire by comparing the normal intensity of light emitted from the light emitting element to the light receiving element and the intensity of light to the light receiving element that has been attenuated due to smoke entering between the pixel elements. A storage circuit for storing the output of the light-receiving element or the output of the amplifier under normal conditions is composed of a capacitor charged through a diode and a junction field effect transistor that discharges this charge through a gate and a source, and A dimming type smoke detector characterized in that the drain of the effect transistor is connected to a power source through a contact that is opened when adjusting the received light output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18805081U JPS5894091U (en) | 1981-12-18 | 1981-12-18 | Dimming smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18805081U JPS5894091U (en) | 1981-12-18 | 1981-12-18 | Dimming smoke detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5894091U true JPS5894091U (en) | 1983-06-25 |
| JPS6324537Y2 JPS6324537Y2 (en) | 1988-07-05 |
Family
ID=30102871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18805081U Granted JPS5894091U (en) | 1981-12-18 | 1981-12-18 | Dimming smoke detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5894091U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60181636A (en) * | 1984-02-29 | 1985-09-17 | Hochiki Corp | Beam type detector |
-
1981
- 1981-12-18 JP JP18805081U patent/JPS5894091U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60181636A (en) * | 1984-02-29 | 1985-09-17 | Hochiki Corp | Beam type detector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6324537Y2 (en) | 1988-07-05 |
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