JPS5824839B2 - photoelectric smoke detector - Google Patents
photoelectric smoke detectorInfo
- Publication number
- JPS5824839B2 JPS5824839B2 JP7831878A JP7831878A JPS5824839B2 JP S5824839 B2 JPS5824839 B2 JP S5824839B2 JP 7831878 A JP7831878 A JP 7831878A JP 7831878 A JP7831878 A JP 7831878A JP S5824839 B2 JPS5824839 B2 JP S5824839B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- smoke detector
- photoelectric smoke
- signal processing
- current flowing
- 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.)
- Expired
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Description
【発明の詳細な説明】
この発明は、光源から放射される光の煙による変化を受
光器側にて検出し火災などを感知する光電式煙感知器に
関し、特に平常時の監視電流を大幅に減少させた光電式
煙感知器を提供するものである。[Detailed Description of the Invention] The present invention relates to a photoelectric smoke detector that detects fire, etc. by detecting changes in light emitted from a light source due to smoke on the receiver side, and in particular significantly reduces the monitoring current during normal times. The present invention provides a photoelectric smoke detector with reduced smoke.
従来から第１図のブロック図に示すような光電式煙感知
器が用いられてきた。Conventionally, photoelectric smoke detectors as shown in the block diagram of FIG. 1 have been used.
すなわち、電源Ｅから供給される電圧を調整する定電圧
回路■を介して、光源ＬＤを間欠的に点灯させるための
発振回路Ｏ１光源ＬＤから放射された光の煙による変化
を検出する受光器ＰＤの出力を増幅する増幅回路Ａ８よ
びこの増幅回路Ａの出力を基準値と比較して警報信号を
発生する信号処理回路Ｃがそれぞれ並列に電源Ｅに接続
されている。That is, an oscillation circuit O for intermittently lighting up the light source LD, a light receiver PD for detecting changes in light emitted from the light source LD due to smoke, via a constant voltage circuit that adjusts the voltage supplied from the power source E. An amplifier circuit A8 for amplifying the output of the amplifier circuit A and a signal processing circuit C for generating an alarm signal by comparing the output of the amplifier circuit A with a reference value are connected in parallel to the power supply E.
そして信号処理回路Ｃの出力側は、電源兼信号線路へ警
報信号を送出する警報回路Ｋに接続されている。The output side of the signal processing circuit C is connected to an alarm circuit K that sends an alarm signal to a power supply/signal line.
このように構成された従来の光電式煙感知器において、
定電圧回路Ｖを流れる電流を１１、発振回路０を流れる
電流をｉ、増幅回路Ａを流れる電流を１３、信号処理回
路Ｃを流れる電流をｉ４、警報回ノ路Ｋを流れる電流を
ｉ、そして煙感知器全体を流れる電流をｉ。In the conventional photoelectric smoke detector configured in this way,
The current flowing through the constant voltage circuit V is 11, the current flowing through the oscillation circuit 0 is i, the current flowing through the amplifier circuit A is 13, the current flowing through the signal processing circuit C is i4, the current flowing through the alarm circuit K is i, and The current flowing through the smoke detector is i.
とすると、平常時における各回路を流れる電流の割合は
発振回路Ｏの電流１２を１として、１１”、ｉ２：１３
：１４：１５二Ｏ−５：１：Ｏ１５：０５：Ｏとなる。Then, the ratio of current flowing through each circuit in normal conditions is 11'', i2:13, assuming current 12 of oscillation circuit O to be 1.
:14:152O-5:1:O15:05:O.
； ここで注目すべきことは、発振回路０を流れる電流
１２が最も大きな割合を占めることである。What should be noted here is that the current 12 flowing through the oscillation circuit 0 occupies the largest proportion.
そこで、この発明の光電式煙感知器においては、この発
振回路０を流れる電流１２を再利用することにより、煙
感知器全体を流れる監視電流を太幅）に減少させた。Therefore, in the photoelectric smoke detector of the present invention, by reusing the current 12 flowing through the oscillation circuit 0, the monitoring current flowing through the entire smoke detector is drastically reduced.
すなわち、第２図のブロック図に一実施例を示すように
、この発明の光電式煙感知器における定電圧回路■と警
報回路にの接続は、第１図の従来の煙感知器と同様であ
るが、増幅回路Ａと信号処理回路Ｃとを並列に接続した
ものを発振回路Ｏに直列接続し、電流を供給する。That is, as one embodiment is shown in the block diagram of FIG. 2, the connection between the constant voltage circuit 2 and the alarm circuit in the photoelectric smoke detector of the present invention is similar to that of the conventional smoke detector shown in FIG. However, an amplifier circuit A and a signal processing circuit C connected in parallel are connected in series to an oscillation circuit O to supply current.
このように接続すると、発振回路Ｏを流れる電流が増幅
回路Ａと信号処理回路Ｃにも流れ、全体を流れる電流が
有効に利用される。When connected in this way, the current flowing through the oscillation circuit O also flows through the amplifier circuit A and the signal processing circuit C, and the current flowing through the entire circuit is effectively utilized.
すなわち、この発明による第２図に示す煙感知器全体に
流れる電流をｉ。That is, the current flowing throughout the smoke detector shown in FIG. 2 according to the present invention is i.
′とし、各回路は第１図に示す従来の煙感知器に流れる
電流と同様の電流が流れるものと仮定すると、従来の煙
感知器の回路全体に流れる電流ｉ。', and assuming that each circuit carries a current similar to the current flowing through the conventional smoke detector shown in FIG. 1, the current flowing through the entire circuit of the conventional smoke detector is i.
との比は、ｉｏ ： ｉ ｏ’＝２，５ ： １．５
となり、従来のものに比べて４０％もの監視電流の減
少となる。The ratio is io:io'=2,5:1.5
Therefore, the monitoring current is reduced by 40% compared to the conventional one.
なお、上記のように増幅回路Ａと信号処理回路Ｃとを共
に発振回路０に直列接続せずとも、増幅回路Ａのみある
いは信号処理回路Ｃのみ発振回路０と直列接続しても、
各回路の条件を上記と同一とするならば従来のものに比
べて２０％位の監視電流の減少となる。Note that even if both the amplifier circuit A and the signal processing circuit C are not connected in series with the oscillation circuit 0 as described above, even if only the amplifier circuit A or the signal processing circuit C is connected in series with the oscillation circuit 0,
If the conditions of each circuit are the same as above, the monitoring current will be reduced by about 20% compared to the conventional one.
以上のように、この発明の光電式煙感知器は、設計上大
きな問題となる監視電流の大幅な削減を実現したもので
あって、防災上有用なものである。As described above, the photoelectric smoke detector of the present invention achieves a significant reduction in monitoring current, which is a major problem in design, and is useful for disaster prevention.
第１図は従来の光電式煙感知器の構成を示すブロック図
、第２図はこの発明による光電式煙感知器の一実施例の
構成を示すブロック図であって、両図を通して同一部分
は同一符号で示しである。
ＬＤ・・・光源、０・・・発振回路、ＰＤ・・・受光器
、Ａ・・・増幅回路、Ｃ・・・信号処理回路。FIG. 1 is a block diagram showing the configuration of a conventional photoelectric smoke detector, and FIG. 2 is a block diagram showing the configuration of an embodiment of the photoelectric smoke detector according to the present invention. The same parts are shown in both figures. They are indicated by the same reference numerals. LD: light source, 0: oscillation circuit, PD: light receiver, A: amplifier circuit, C: signal processing circuit.
Claims (1)
上記光源から放射され、煙により変化した光が入射する
受光器と、該受光器の出力を増幅する増幅回路と、該増
幅回路の出力を基準値と比較して警報信号を発生する信
号処理回路とを備えた光電式煙感知器において、上記増
幅回路と信号処理回路のうち少なくとも一回路の電源供
給回路を上記発振回路の電源供給回路と直列に接続した
ことを特徴とする光電式煙感知器。1 a light source, an oscillation circuit that lights up the light source intermittently,
A light receiver into which light emitted from the light source and modified by smoke enters; an amplifier circuit that amplifies the output of the light receiver; and a signal processing circuit that compares the output of the amplifier circuit with a reference value and generates an alarm signal. A photoelectric smoke detector comprising: a power supply circuit for at least one of the amplifier circuit and the signal processing circuit is connected in series with a power supply circuit for the oscillation circuit. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7831878A JPS5824839B2 (en) | 1978-06-28 | 1978-06-28 | photoelectric smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7831878A JPS5824839B2 (en) | 1978-06-28 | 1978-06-28 | photoelectric smoke detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5543602A JPS5543602A (en) | 1980-03-27 |
| JPS5824839B2 true JPS5824839B2 (en) | 1983-05-24 |
Family
ID=13658585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7831878A Expired JPS5824839B2 (en) | 1978-06-28 | 1978-06-28 | photoelectric smoke detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5824839B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61631U (en) * | 1984-06-06 | 1986-01-06 | 中小企業事業団 | Pentagonal keyboard surface with auxiliary surface |
| JPS6160356U (en) * | 1984-09-26 | 1986-04-23 |
-
1978
- 1978-06-28 JP JP7831878A patent/JPS5824839B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61631U (en) * | 1984-06-06 | 1986-01-06 | 中小企業事業団 | Pentagonal keyboard surface with auxiliary surface |
| JPS6160356U (en) * | 1984-09-26 | 1986-04-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5543602A (en) | 1980-03-27 |
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