JPS6270736A - Smoke sensor - Google Patents
Smoke sensorInfo
- Publication number
- JPS6270736A JPS6270736A JP21133585A JP21133585A JPS6270736A JP S6270736 A JPS6270736 A JP S6270736A JP 21133585 A JP21133585 A JP 21133585A JP 21133585 A JP21133585 A JP 21133585A JP S6270736 A JPS6270736 A JP S6270736A
- Authority
- JP
- Japan
- Prior art keywords
- light
- smoke
- light emitting
- section
- reflector
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
- G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
【発明の詳細な説明】
［技術分野１
本発明は煙感知器、さらに詳しくは、間欠的にパルス状
の光線を送出する発光部と、発光部から所定距離離間し
て配設され発″＃：、部から送出された光線を発光部側
に反射する反射体と、発光部より送出され反射体により
反射された光線を受光する受光部と、受光部で受光され
た光線の減光量が所定値以上となると煙検出信号を出力
する信号処理部とを備えた煙感知器に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to a smoke detector, and more specifically, a smoke detector, which includes a light emitting part that intermittently emits a pulsed light beam, and a light emitting part arranged at a predetermined distance from the light emitting part. :, a reflector that reflects the light rays sent out from the light emitting part toward the light emitting part, a light receiving part that receives the light rays sent from the light emitting part and reflected by the reflector, and a predetermined amount of attenuation of the light rays received by the light receiving part. The present invention relates to a smoke sensor including a signal processing section that outputs a smoke detection signal when the value exceeds a value.
［背景技術１
一般に高天井の部屋等で相当に広い範囲での煙の発生を
検出する減光型の煙感知器としては、発光部と受光部と
を５〜１００［＋ｏｌ程度離１；ＩＩ して配設し、発
光部から受光部に到達する尤の減光Ｈ＋ｂｉが煙の存在
によって所定値以上となったときにど煙検出信号を出力
するものがある。このような煙感知器では発光部と受光
部とが相当に離れて配、没されているものであるから、
配線が面倒である。[Background technology 1] In general, a dimming type smoke detector that detects the occurrence of smoke over a fairly wide area in a room with a high ceiling, etc., has a light emitting part and a light receiving part separated by about 5 to 100[+ol]1; II There is a device which outputs a smoke detection signal when the expected light attenuation H+bi reaching the light receiving portion from the light emitting portion exceeds a predetermined value due to the presence of smoke. In such smoke detectors, the light-emitting part and the light-receiving part are located and placed quite far apart, so
Wiring is troublesome.
この問題を解決するものとして、第３し１に示すように
発光部と受光部とを同一の装置本体１内に収納するとと
もに、発光部から送出された光線を受光部に反ａｔさせ
る鏡のような反射体２を装置ｕ本体１と１土灯向して配
設することにより、）も路内での煙：）の（ｆ在による
減光！ｊｔにより煙の存在を検出するようにしたものが
考えられる。しかしながら、この装置において、装置本
体１の近傍に煙３が存在しているときに、発光部から送
出された光線が第３図中破線で示すように煙３で反射し
て受光部に導入されるものであるから、煙３が発生して
いるにもかかわらず受光光量か減少しないことがあり、
煙３の存在が正確に検出できず誤動作を生じることがあ
る。To solve this problem, as shown in Section 3 and 1, the light emitting part and the light receiving part are housed in the same device main body 1, and a mirror is used to reflect the light beam sent out from the light emitting part to the light receiving part. By arranging the reflector 2 facing the device u main body 1 and earth lamp 1, the presence of smoke can be detected by the dimming of light due to the presence of smoke in the road. However, in this device, when smoke 3 is present near the device main body 1, the light beam emitted from the light emitting part is reflected by the smoke 3 as shown by the broken line in FIG. Since the light is introduced into the light receiving section, the amount of light received may not decrease even though smoke 3 is generated.
The presence of smoke 3 may not be detected accurately and malfunction may occur.
［発明の目的］
本発明は上述の点に鑑みて為されたものであって、その
主な目的とするところは、煙が装置本体の近傍に存在し
ていても煙からの反射による誤動作が生じないようにし
た煙感知器を提供することにある。[Object of the Invention] The present invention has been made in view of the above points, and its main purpose is to prevent malfunctions due to reflection from smoke even if smoke is present near the main body of the device. An object of the present invention is to provide a smoke detector that prevents smoke from occurring.
［発明の開示１
（実施例）
以下、本発明の実施例を図面に基づいて説明する。第１
図に示すように、本体ＶＣ置１は間欠的にパルスを発生
するパルス発生部１１と、パルス発生部１１がら出力さ
れたパルスを増幅する発光素子駆動部Ｉ２と、発光素子
駆動部１２の出力を受けて間欠的に光パルスを送出する
発光索子１３と、発光素子１３から送出され鏡のような
反射体２で反射された光を受光する受光素子１４と、パ
ルス発生部１１の出力に基づいてパルスが出力されてか
ら所定時間後にゲート開放信号を出力する遅延部１５と
、ゲート開放信号が出力されている期間に受光素子１４
の出力信号を通過させるゲート部１６と、ゲート部１６
を通過した信号を増幅する増幅部１７と、増幅部１７の
出力に基づいて減光量が所定値以上であると煙検出信号
を出力する信号処理部１８とから構成される。[Disclosure of the Invention 1 (Examples) Examples of the present invention will be described below based on the drawings. 1st
As shown in the figure, the main VC device 1 includes a pulse generator 11 that intermittently generates pulses, a light emitting element driver I2 that amplifies the pulses output from the pulse generator 11, and an output of the light emitting element driver 12. a light-emitting element 13 that receives the light and intermittently sends out light pulses; a light-receiving element 14 that receives the light sent from the light-emitting element 13 and reflected by the mirror-like reflector 2; a delay unit 15 that outputs a gate open signal after a predetermined time after the pulse is output based on the pulse, and a light receiving element 14 that outputs a gate open signal during a period when the gate open signal is output.
a gate section 16 through which the output signal of the gate section 16 passes;
The signal processing section 18 includes an amplification section 17 that amplifies the signal passed through the amplification section 17, and a signal processing section 18 that outputs a smoke detection signal when the amount of light attenuation is equal to or greater than a predetermined value based on the output of the amplification section 17.
ここで、発光素子１３から送出された光線が受光索子１
４で受光されるまでの時間Ｔ［５ｅｃｌは、装置本体１
と反射体２との距離をＬ［ｍ］とすれば、Ｔ＝２ＸＬ／
３Ｘ１０”
と表わされ、たとえばｉ置本体１と反射体２との距離を
１５しｎｌとすれば、所要時間Ｔは１００ ［ｎ５ｅｅ
ｌとなる。すなり′ち、発光素子１３がら光線が送出さ
れてがら１００ ［ｎ５ｅｃ］後に受光素子１４で受光
された光が反射体２で反射された光線であると考えられ
るから、それ以前に受光された光線は光路中で煙等によ
り反射された光であると考えらｈる。しかるに、遅延部
１５より出力されるゲート開放信号をパルス発生部１１
がら出力されるパルスの立ち上がりから上記所要時間Ｔ
より若干短い時間遅延させて立ち上がるようにすれば、
光路中での反射による誤動作が防止できるのである。Here, the light beam sent out from the light emitting element 13 is transmitted to the light receiving element 1.
The time T [5ecl] until light is received at 4 is the time T [5ecl]
If the distance between the reflector 2 and the reflector 2 is L [m], then T=2XL/
For example, if the distance between the main body 1 and the reflector 2 is 15 nl, the required time T is 100 [n5ee].
It becomes l. In other words, since the light received by the light receiving element 14 100 [n5ec] after the light is emitted from the light emitting element 13 is considered to be the light reflected by the reflector 2, it is considered that the light received before that time is the light that was reflected by the reflector 2. The light rays are considered to be light reflected by smoke or the like in the optical path. However, the gate opening signal output from the delay section 15 is transmitted to the pulse generating section 11.
The above required time T from the rising edge of the output pulse
If you start up with a slightly shorter delay,
Malfunctions due to reflections in the optical path can be prevented.
パルス発生部１１がら出力されるパルス幅は上記所要＋
１．′Ｉ間Ｔの１０分の１程度に設定しておし以」二の
構成により、第２図（、）に示すように、パルス発生部
１１がらパルスが送出されてから所定の遅延時開Ｔ１後
に第２図（ｂ）のようにデー） ＩＪｌｆ放信号が出力
されてゲート部１６が開放されるのであり、光路中に煙
等が存在して第２図（ｃ）のように反射光Ｐ１が検出さ
れたとしても、この期間にはゲート部１６が開放されて
いないから、反射光Ｐ１はゲート部１６を通過できない
のであり、ｔｐＪ２図（ｄ）に示すように、反射体２て
・反射さ７″した尤Ｐ２のみがゲート部１６を通過して
増幅回路１７を介してイ８号処理回路１８に人力される
のである。信号処理回路１８では反射体２で反射されｔ
こ光の滅ｙＣ量を検出して滅装量が所定値以上であると
、煙によって減光されたものとして煙検出信号を出力す
るのである。この煙検出信号によりブザーやベルのよう
なＷ報音を出力する警報装置、あるいはランプをへ滅さ
せる警報表示を行なう警報装置等を駆動することができ
るのである。The pulse width output from the pulse generator 11 is the above required +
1. By setting the interval T to about one-tenth of the I interval T, the second configuration allows the pulse generator 11 to open at a predetermined delay after the pulse is sent out, as shown in FIG. After T1, the IJlf emission signal is output as shown in Fig. 2(b) and the gate section 16 is opened, and if there is smoke etc. in the optical path, reflected light is emitted as shown in Fig. 2(c). Even if P1 is detected, the gate part 16 is not open during this period, so the reflected light P1 cannot pass through the gate part 16, and as shown in tpJ2 figure (d), the reflector 2 Only the reflected signal P2 passes through the gate section 16 and is input to the processing circuit A8 via the amplifier circuit 17. In the signal processing circuit 18, it is reflected by the reflector 2 and
When the amount of extinction of the light is detected and the amount of extinction is equal to or greater than a predetermined value, a smoke detection signal is output as the light has been attenuated by smoke. This smoke detection signal can drive an alarm device such as a buzzer or bell that outputs a double warning sound, or an alarm device that displays an alarm to burn out a lamp.
［発明の効果［
本発明は上述のように、間欠的にパルス状の光線を送出
する発光部と、発光部から所定距離離間して配設され発
光部から送出された光１線を発光部側に反射する反射体
と、発光部より送出され反射体により反射された光線を
受光する受光部と、受光部で受光された光線の減光量が
所定値以」二となると煙検出信号を出力する（Ｆｒ号処
理部とを備えた煙感知器において、発光部から光線を送
出して後、発光部から反３す体を経て受光部に至る光路
での光線の所要時間に略等しい所定時間、信号処理部へ
の入力を禁止するゲート部が設けられているので、反射
体に至らずに光路中の煙等により反射された光線に対応
した受光（ｉｆ号がイｄ号処理部に人力されないもので
あり、反射体で反射されたと考えられる光線のみの滅箕
量を測定することにより誤動作することなく、煙の検出
が正確に行なえるという利、貞を有する。[Effects of the Invention] As described above, the present invention includes a light emitting section that intermittently emits pulsed light beams, and a light emitting section that is arranged at a predetermined distance from the light emitting section and transmits one ray of light emitted from the light emitting section. A reflector that reflects to the side, a light receiver that receives the light beam sent from the light emitter and reflected by the reflector, and outputs a smoke detection signal when the amount of attenuation of the light beam received by the light receiver is equal to or greater than a predetermined value. (In a smoke detector equipped with a No. Fr processing section, after sending out a light beam from the light emitting section, a predetermined period of time approximately equal to the time required for the light beam to travel from the light emitting section to the light receiving section via the mirror body. Since a gate section is provided that prohibits input to the signal processing section, light reception corresponding to light rays reflected by smoke, etc. in the optical path without reaching the reflector (if signal is manually input to the id processing section) is provided. This method has the advantage that smoke can be detected accurately without malfunction by measuring only the amount of light that is considered to have been reflected by the reflector.
第１図は本発明の一実施例を示すブロック図、第２図は
第１図中容部の信号を示す動作説明図、第３図は本発明
に係る煙感知器を示す概略構成図である。
１は装置本体、２は反射体、１１はパルス発生部、１２
は発光素子駆動部、１３は発光素子、１４は受光素子、
１５は遅延部、１．６１．ｔゲート部、１７は増幅部、
１８は信号処理部である。
代理人 弁理士 石 １）艮 七
第３図FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an operational explanatory diagram showing signals of the container part in FIG. 1, and FIG. 3 is a schematic configuration diagram showing a smoke detector according to the present invention. be. 1 is the device main body, 2 is the reflector, 11 is the pulse generator, 12
13 is a light emitting element, 14 is a light receiving element,
15 is a delay section, 1.61. t gate section, 17 is an amplification section,
18 is a signal processing section. Agent Patent Attorney Ishi 1) Ai Figure 7 3
Claims (1)
光部から所定距離離間して配設され発光部から送出され
た光線を発光部側に反射する反射体と、発光部より送出
され反射体により反射された光線を受光する受光部と、
受光部で受光された光線の減光量が所定値以上となると
煙検出信号を出力する信号処理部とを備えた煙感知器に
おいて、発光部から光線を送出して後、発光部から反射
体を経て受光部に至る光路での光線の所要時間に略等し
い所定時間、信号処理部への入力を禁止するゲート部が
設けられたことを特徴とする煙感知器。(1) A light emitting section that intermittently sends out pulsed light beams, a reflector that is disposed a predetermined distance from the light emitting section and reflects the light beams sent out from the light emitting section toward the light emitting section, and a reflector that reflects the light beams sent out from the light emitting section toward the light emitting section; a light receiving unit that receives the light beam reflected by the reflector;
In a smoke detector equipped with a signal processing section that outputs a smoke detection signal when the amount of attenuation of the light beam received by the light receiving section exceeds a predetermined value, the light beam is sent out from the light emitting section and then the reflector is removed from the light emitting section. What is claimed is: 1. A smoke detector comprising a gate section that prohibits input to a signal processing section for a predetermined period of time that is approximately equal to the time required for a light beam to pass through an optical path and reach a light receiving section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21133585A JPS6270736A (en) | 1985-09-25 | 1985-09-25 | Smoke sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21133585A JPS6270736A (en) | 1985-09-25 | 1985-09-25 | Smoke sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6270736A true JPS6270736A (en) | 1987-04-01 |
Family
ID=16604250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21133585A Pending JPS6270736A (en) | 1985-09-25 | 1985-09-25 | Smoke sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6270736A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720649A (en) * | 1980-07-14 | 1982-02-03 | Matsushita Electric Works Ltd | Light attenuation type smoke sensor |
| JPS58101393A (en) * | 1981-12-11 | 1983-06-16 | 能美防災工業株式会社 | Dimmer type smoke detector by pulse light |
| JPS5926475U (en) * | 1982-08-11 | 1984-02-18 | 三菱重工業株式会社 | Cable take-up reel for flexible tube conveyor |
-
1985
- 1985-09-25 JP JP21133585A patent/JPS6270736A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720649A (en) * | 1980-07-14 | 1982-02-03 | Matsushita Electric Works Ltd | Light attenuation type smoke sensor |
| JPS58101393A (en) * | 1981-12-11 | 1983-06-16 | 能美防災工業株式会社 | Dimmer type smoke detector by pulse light |
| JPS5926475U (en) * | 1982-08-11 | 1984-02-18 | 三菱重工業株式会社 | Cable take-up reel for flexible tube conveyor |
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