JPS5910606Y2 - photoelectric sensor - Google Patents
photoelectric sensorInfo
- Publication number
- JPS5910606Y2 JPS5910606Y2 JP1978102951U JP10295178U JPS5910606Y2 JP S5910606 Y2 JPS5910606 Y2 JP S5910606Y2 JP 1978102951 U JP1978102951 U JP 1978102951U JP 10295178 U JP10295178 U JP 10295178U JP S5910606 Y2 JPS5910606 Y2 JP S5910606Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- receiver
- emitter
- mounting surface
- smoke
- 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
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【考案の詳細な説明】 本考案は光電式感知器に関する。[Detailed explanation of the idea] The present invention relates to a photoelectric sensor.
一般に、光電式感知器として、発光器からの光が侵入し
た煙により散乱して受光素子に入射されることにより、
侵入した上記の煙を検知するようにしたものが知られて
いる。In general, as a photoelectric sensor, light from a light emitter is scattered by invading smoke and incident on a light receiving element.
A device is known that detects the above-mentioned smoke that has entered.
従来、この種の光電式感知器では第１図及び第２図にも
略示するように、光電式感知器１を天井に取付けたとき
天井面と平行になる面（第２図に鎖線ａで示す）上に発
光器２と受光器３とが取付けられ、発光器２と受光器３
との光軸方向ａ， １）に所定の角度θをもたせ、発
光器２からの光が直接受光器３に入射することなく、検
煙部Ｃで前記煙により散乱した光のみが受光器３に入射
するようにしていた。Conventionally, in this type of photoelectric sensor, as shown schematically in FIGS. 1 and 2, when the photoelectric sensor 1 is mounted on the ceiling, a surface parallel to the ceiling surface (dashed line a in FIG. 2) A light emitter 2 and a light receiver 3 are attached on top of the light emitter 2 and a light receiver 3 shown in
A predetermined angle θ is made in the optical axis direction a, 1) between the light emitter 2 and the light receiver 3 so that the light from the emitter 2 does not directly enter the light receiver 3. I was trying to make it incident on .
なお、発光器２は筒体４及び該筒体に収納されたランプ
５と投光レンズ６とよりなり、又受光器３は筒体７及び
該筒体に収納された受光素子８と集光レンズ９とよりな
る。The light emitter 2 consists of a cylindrical body 4, a lamp 5 housed in the cylindrical body, and a light emitting lens 6, and the light receiver 3 consists of a cylindrical body 7, a light-receiving element 8 housed in the cylindrical body, and a light condenser. It consists of a lens 9.
発光器２及び受光器３を取付面αに取付けるための取付
具は図示を省略してある。The attachments for attaching the light emitter 2 and the light receiver 3 to the attachment surface α are not shown.
上記のような充電式感知器において、感知器の筐体内に
は遮光板２０が設けてあるから、取付面αと平行な面に
関して、即ち水平方向に関しては、例えば発光器２のレ
ンズ６に露滴したことによるノイズ光などは遮光板２０
により遮断されることになるが、取付面αに対して垂直
方向に関しては取付面αや筐体の底部１０により発光器
２からの光が乱反射して受光器３に至る虞れがある。In the rechargeable sensor as described above, since the light shielding plate 20 is provided inside the sensor housing, for example, the lens 6 of the light emitter 2 is exposed to the surface parallel to the mounting surface α, that is, in the horizontal direction. The light shielding plate 20 prevents noise light caused by the dripping.
However, in the direction perpendicular to the mounting surface α, the light from the light emitter 2 may be diffusely reflected by the mounting surface α or the bottom 10 of the casing and may reach the light receiver 3.
この垂直方向に関する乱反射の影響をなくすには第２図
における距離Ｘ１，Ｘ２を大きくすることにより解消す
ることができる。The influence of diffuse reflection in the vertical direction can be eliminated by increasing the distances X1 and X2 in FIG. 2.
しかし、このようにすると充電式感知器１の筐体が大き
くなると言う欠点があり、特にｘ２を大きくすると、さ
らに次のような欠点がある。However, this has the disadvantage that the casing of the rechargeable sensor 1 becomes larger, and in particular, when x2 is increased, the following disadvantages occur.
（イ）取付面αの発光器２と受光器３との反対側には電
気回路を組込んだプリント基板が取付けられているが、
距離Ｘ２が大きくなるとプリント基板と発光器２及び受
光器３との間隔が大となるので、発光器２と受光器３の
リード線を長くする必要があり、プリント基板と発光器
２及び受光器３との実装がしにくくなる。(a) A printed circuit board incorporating an electric circuit is installed on the opposite side of the mounting surface α from the light emitter 2 and the light receiver 3.
When the distance 3 will be difficult to implement.
（ロ）煙は筐体の周囲から流入するようになっているが
発光器２及び受光器３とが煙の流入のさまたげとなる。(b) Smoke flows in from the periphery of the housing, but the light emitter 2 and light receiver 3 block the inflow of smoke.
（ハ）発光器２及び受光器３により形或される光束は平
行光線であるとはいっても、実際には末広がりの光束と
なるので、取付面αからの乱反射の影響が無視されるた
めの有効距離は発光器２及び受光器３を離した程大きく
ならない。(c) Even though the light beam formed by the emitter 2 and the light receiver 3 is parallel, it actually becomes a light beam that spreads toward the end, so the influence of diffuse reflection from the mounting surface α is ignored. The effective distance does not increase as the emitter 2 and receiver 3 are separated from each other.
本考案はこのような欠点を解消するためになされたもの
で、筐体を小型にしたにもかかわらず発光器及び受光器
の取付面に対して垂直方向の乱反射を無視することがで
き、したがって筐体を大型にすることなしにノイズレベ
ルを低くすることができる光電式感知器を提供するもの
である。The present invention was developed to eliminate these drawbacks, and even though the housing is made smaller, diffuse reflection in the direction perpendicular to the mounting surface of the emitter and receiver can be ignored. To provide a photoelectric sensor that can lower the noise level without increasing the size of the housing.
以下に、本考案の一実施例を第３図及び第４図について
説明する。An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.
第３図において、２は発光器、３は受光器であり、発光
器２は筒体４及び該筒体に収納されたランプ５及びレン
ズ６よりなる。In FIG. 3, 2 is a light emitter, and 3 is a light receiver. The light emitter 2 consists of a cylinder 4, a lamp 5 and a lens 6 housed in the cylinder.
又、受光器３は筒体７及び該筒体に収納された受光素子
８よりなる。Further, the light receiver 3 includes a cylindrical body 7 and a light receiving element 8 housed in the cylindrical body.
上記した発光器２と受光器３との光軸は第４図のように
取付面αと平行な面上において所定の角度を有し、この
角度は発光器２からの光が受光器３には直接人対せず、
しかも筐体１２内に侵入した煙によって検煙部Ｃで散乱
した光が受光器３に入射する角度に選定されている。The optical axes of the light emitter 2 and the light receiver 3 described above have a predetermined angle on a plane parallel to the mounting surface α as shown in FIG. does not deal with people directly,
Moreover, the angle is selected so that the light scattered by the smoke detector C due to the smoke that has entered the housing 12 is incident on the light receiver 3.
なお、第３図、第４図において取付面αは基台１３に設
けられている。In addition, in FIGS. 3 and 4, the mounting surface α is provided on the base 13.
また、遮光板２０は遮光効果をよくするため２枚設けて
ある。Further, two light shielding plates 20 are provided to improve the light shielding effect.
さらに、発光器２と受光器３との光軸は取付面αに垂直
な方向に対してわずかに傾斜するように、発光器２及び
受光器３が取付けられているので、取付面αと発光器２
及び受光器３との距離を小さくしても、取付面αからの
乱反射光が受光器３に入射する虞れはない。Furthermore, since the light emitter 2 and the light receiver 3 are mounted so that the optical axes of the light emitter 2 and the light receiver 3 are slightly inclined with respect to the direction perpendicular to the mounting surface α, the mounting surface α and the light emitting Vessel 2
Even if the distance to the light receiver 3 is made small, there is no risk that the diffusely reflected light from the mounting surface α will enter the light receiver 3.
また取付面αには発光器２と受光器３との間に、即ち検
煙部Ｃ及びその周辺部と対向する部分に凹部１８を設け
、取付面αと光軸との距離が大きくなるようにして、乱
反射による影響を一層小さくしてある。In addition, a recess 18 is provided on the mounting surface α between the emitter 2 and the light receiver 3, that is, in a portion facing the smoke detection section C and its surroundings, so that the distance between the mounting surface α and the optical axis is increased. This further reduces the influence of diffused reflection.
なお、発光器２からの光は筐体１３の側面に投光され、
その側面にて乱反射する恐れがあるが、受光器３は筐体
１３の側面よりやや中央に位置し、かつ筒体７が中央側
に開口している為、乱反射光が受光器３に入射すること
はない。Note that the light from the light emitter 2 is projected onto the side surface of the housing 13,
There is a risk of diffuse reflection from the side surfaces, but since the light receiver 3 is located slightly in the center of the casing 13 than the side surfaces, and the cylindrical body 7 is open toward the center, the diffusely reflected light enters the light receiver 3. Never.
以上のように、本考案によれば、発光器及び受光器とそ
の取付面との距離を小さくしたにもかかわらず、取付面
に対して垂直方向の乱反射を無視することができる。As described above, according to the present invention, diffuse reflection in the direction perpendicular to the mounting surface can be ignored even though the distance between the light emitter and the light receiver and the mounting surface is reduced.
したがって筐体を大型にすることなくノイズレベルを低
くすることができ、プノント基板と発光器及び受光器の
実装がしにくくなったり、発光器及び受光器が煙の流入
のさまたげになることがない、また光束が末広がりであ
ることによる乱反射の影響も効率よく除くことができる
。Therefore, the noise level can be lowered without increasing the size of the housing, making it difficult to mount the emitter and receiver on the Pnont board, and preventing the emitter and receiver from interfering with the inflow of smoke. In addition, the influence of diffused reflection due to the divergence of the luminous flux can also be efficiently removed.
第１図は従来例を示す概略平面図、第２図は第１図の概
略正面図、第３図乃至第４図は本考案の一実施例を示す
ものであり、第３図は発光器及び受光器の光軸に沿って
断面した断面図、第４図は横断底面図である。
２・・・発光器、３・・・受光器。FIG. 1 is a schematic plan view showing a conventional example, FIG. 2 is a schematic front view of FIG. 1, and FIGS. 3 to 4 show an embodiment of the present invention. FIG. 4 is a cross-sectional view taken along the optical axis of the light receiver, and FIG. 4 is a cross-sectional bottom view. 2... Emitter, 3... Light receiver.
Claims (1)
受光器に照射されることにより、侵入した上記の煙を検
知するようにした光電式感知器において、 上記発光器と上記受光器が取付けられる取付面と平行な
面上で上記した散乱による光のみが上記受光器に入射す
るのに必要な上記発光器と受光器との光軸方向の相互の
角度を選定し、更にこれらの発光器と受光器との光軸方
向を上記取付面に垂直な方向に対してわずかに傾斜する
ように選定するとともに、上記取付面の上記検煙部及び
その周辺部と対向する部分に凹部を設けたことを特徴と
する充電式感知器。[Claims for Utility Model Registration] A photoelectric sensor that detects the above-mentioned invading smoke by scattering the light from the light emitting device by the invading smoke at the smoke detector and irradiating it to the receiver. In this case, the optical axis direction of the light emitter and the light receiver is such that only the light caused by the above scattering on a plane parallel to the mounting surface on which the light emitter and the light receiver are mounted is incident on the light receiver. Furthermore, the optical axes of the emitter and receiver are selected to be slightly inclined with respect to the direction perpendicular to the mounting surface, and the smoke detection section and its A rechargeable sensor characterized by having a recessed part in a part facing the peripheral part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978102951U JPS5910606Y2 (en) | 1978-07-28 | 1978-07-28 | photoelectric sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978102951U JPS5910606Y2 (en) | 1978-07-28 | 1978-07-28 | photoelectric sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5520449U JPS5520449U (en) | 1980-02-08 |
| JPS5910606Y2 true JPS5910606Y2 (en) | 1984-04-03 |
Family
ID=29043009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978102951U Expired JPS5910606Y2 (en) | 1978-07-28 | 1978-07-28 | photoelectric sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5910606Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2754139A1 (en) * | 1976-12-23 | 1978-07-06 | Cerberus Ag | SMOKE DETECTOR |
-
1978
- 1978-07-28 JP JP1978102951U patent/JPS5910606Y2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2754139A1 (en) * | 1976-12-23 | 1978-07-06 | Cerberus Ag | SMOKE DETECTOR |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5520449U (en) | 1980-02-08 |
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