JPH01144992U - - Google Patents
Info
- Publication number
- JPH01144992U JPH01144992U JP3830488U JP3830488U JPH01144992U JP H01144992 U JPH01144992 U JP H01144992U JP 3830488 U JP3830488 U JP 3830488U JP 3830488 U JP3830488 U JP 3830488U JP H01144992 U JPH01144992 U JP H01144992U
- Authority
- JP
- Japan
- Prior art keywords
- level
- fire alarm
- light source
- reference light
- optical window
- 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
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims 4
- 238000011109 contamination Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Fire Alarms (AREA)
- Fire-Detection Mechanisms (AREA)
Description
第１図は本考案の一実施例の構成を示すブロツ
ク図。
１……光学窓材を形成する保護窓、２……セン
サ、３……増幅器、４……可変減衰器、５……レ
ベル比較器、６……規準電圧源、７……制御装置
、８……制御回路、９……基準電圧源、１０およ
び１２……出力回路、１１……基準光源。
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Protective window forming an optical window material, 2... Sensor, 3... Amplifier, 4... Variable attenuator, 5... Level comparator, 6... Reference voltage source, 7... Control device, 8 ... Control circuit, 9 ... Reference voltage source, 10 and 12 ... Output circuit, 11 ... Reference light source.
Claims (1)
れるふく射エネルギーに対応した電気信号に変換
する変換手段と、外部との遮断と共に前記受光部
に光を導くための光学窓材と、前記電気信号のレ
ベルに伴つて火災と判定して警報する判定手段と
を備えた火災警報装置において、前記光学窓材の
汚損に応じて前記変換手段から出力された電気信
号のレベルを調整するレベル調整手段を備えたこ
とを特徴とする火災警報装置。 (2) レベル調整手段は変換手段の受光部に光学
窓材を介して光を投射する基準光源と、前記変換
手段と判定手段との間に接続したレベル可変手段
と、前記基準光源を点灯したときの前記レベル可
変手段の出力レベルが所定レベルとなるように前
記レベル可変手段を制御する制御手段とからなる
ことを特徴とする請求項１記載の火災警報装置。 (3) 制御手段は基準光源を所定期間毎に点灯の
指示をするタイマ手段を備えたことを特徴とする
請求項２の火災警報装置。[Claims for Utility Model Registration] (1) Conversion means for receiving light from a flame in a light receiving section and converting it into an electrical signal corresponding to the radiant energy radiated from the flame; In the fire alarm device, the fire alarm device includes an optical window material for guiding the electric signal, and a determination means for determining a fire and issuing an alarm based on the level of the electric signal, in which an output signal is output from the conversion means in accordance with the contamination of the optical window material. A fire alarm device characterized in that it is equipped with a level adjustment means for adjusting the level of an electric signal. (2) The level adjustment means includes a reference light source that projects light onto the light receiving section of the conversion means through an optical window material, a level variable means connected between the conversion means and the determination means, and a reference light source that illuminates the reference light source. 2. The fire alarm system according to claim 1, further comprising a control means for controlling said level variable means so that the output level of said level variable means becomes a predetermined level. (3) The fire alarm system according to claim 2, wherein the control means includes timer means for instructing to turn on the reference light source at predetermined intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988038304U JP2507204Y2 (en) | 1988-03-25 | 1988-03-25 | Fire alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988038304U JP2507204Y2 (en) | 1988-03-25 | 1988-03-25 | Fire alarm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01144992U true JPH01144992U (en) | 1989-10-05 |
| JP2507204Y2 JP2507204Y2 (en) | 1996-08-14 |
Family
ID=31264862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988038304U Expired - Lifetime JP2507204Y2 (en) | 1988-03-25 | 1988-03-25 | Fire alarm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2507204Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04367999A (en) * | 1991-06-15 | 1992-12-21 | Nittan Co Ltd | Flame sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56133548U (en) * | 1980-03-10 | 1981-10-09 |
-
1988
- 1988-03-25 JP JP1988038304U patent/JP2507204Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56133548U (en) * | 1980-03-10 | 1981-10-09 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04367999A (en) * | 1991-06-15 | 1992-12-21 | Nittan Co Ltd | Flame sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2507204Y2 (en) | 1996-08-14 |
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