JPS63136196A - Photoelectric type smoke sensor - Google Patents
Photoelectric type smoke sensorInfo
- Publication number
- JPS63136196A JPS63136196A JP28063686A JP28063686A JPS63136196A JP S63136196 A JPS63136196 A JP S63136196A JP 28063686 A JP28063686 A JP 28063686A JP 28063686 A JP28063686 A JP 28063686A JP S63136196 A JPS63136196 A JP S63136196A
- Authority
- JP
- Japan
- Prior art keywords
- variable resistor
- amplifier
- output
- circuit
- sensor
- 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
- 239000000779 smoke Substances 0.000 title claims description 17
- 230000035945 sensitivity Effects 0.000 claims description 14
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 く技術分野〉 この発明は光電式煙感知器に関するものである。[Detailed description of the invention] Technical fields> This invention relates to a photoelectric smoke detector.
〈従来技術〉
従来、光電式煙感知器では、その感度の調整を受光素子
の出力を増幅する増幅器の利得などを可変抵抗器で調整
することにより行なっていた。<Prior Art> Conventionally, the sensitivity of a photoelectric smoke detector has been adjusted by adjusting the gain of an amplifier that amplifies the output of a light-receiving element using a variable resistor.
〈従来技術の問題点〉
しかし、上記可変抵抗器は感知器内のプリント板などに
設けられていたので、ドライバーにより感度調整後、感
知器裏蓋を取り付は出荷することとなり、作業が煩雑と
なった。また、ロボットなどにより調整作業を自動化さ
せることも考えられるが、感知器には冗長回路または積
分回路が設けられているので、可変抵抗器を少し回し冗
長回路が働（時間を置いて再び回わす手順を繰り返す必
要が有り、調整に時間がかかることとなる。<Problems with the prior art> However, since the variable resistor described above was installed on a printed board inside the sensor, the sensor back cover had to be attached and shipped after the sensitivity was adjusted using a screwdriver, making the work complicated. It became. It is also possible to automate the adjustment work using robots, etc., but since the sensor is equipped with a redundant circuit or an integrating circuit, the redundant circuit works by turning the variable resistor a little (turning it again after a while). It is necessary to repeat the procedure, and the adjustment takes time.
〈問題点を解決するための手段〉
この発明は上記欠点にかんがみ、感知器が完成された状
態で、感知器を外部より簡単に短時間で調整できる光電
式煙感知器を得ることを目的としｋもので、受光素子の
出力を増幅する増幅器あるいはコンパレータのしきい値
などを可変抵抗器で調整することにより感知器の感度を
設定する光電式煙感知器において、感知器の裏蓋に、感
知器内部の上記可変抵抗器を調整するためのドライバー
挿入孔と、この可変抵抗器を所定値まで急速に回動させ
るために上記増幅器の出力あるいはしきい値の状態を検
出するための端子またはそれへの接触ピンを挿入するた
めの孔が設けられたことを特徴とする。<Means for Solving the Problems> In view of the above drawbacks, the present invention aims to provide a photoelectric smoke detector in which the detector can be easily adjusted from the outside in a short time when the detector is completed. In photoelectric smoke detectors, the sensitivity of the sensor is set by adjusting the amplifier that amplifies the output of the light receiving element or the threshold value of the comparator using a variable resistor. a screwdriver insertion hole for adjusting the variable resistor inside the device; and a terminal or terminal for detecting the output or threshold state of the amplifier in order to rapidly rotate the variable resistor to a predetermined value. It is characterized by having a hole for inserting a contact pin into it.
く 作 用 〉
所定濃度の煙に感知器を晒し、ドライバーをＷＩＩのド
ライバー挿入孔より挿入する。可変抵抗器を増幅器の出
力が所定値に達するまで急速に回動させ、その後、徐々
に回動させ感知器が動作した時点で回動を停止し調整を
終了する。How it works: Expose the sensor to smoke at a specified concentration, and insert a screwdriver into the WII's screwdriver insertion hole. The variable resistor is rapidly rotated until the output of the amplifier reaches a predetermined value, then gradually rotated, and when the sensor is activated, the rotation is stopped to complete the adjustment.
く 実 施 例 〉
以下この発明の光電式煙感知器の一実施例を第１図ない
し第３図により説明する。Embodiment> An embodiment of the photoelectric smoke detector of the present invention will be described below with reference to FIGS. 1 to 3.
図において、１はＬＥＤなどの発光素子２を備えた発光
回路で、例えば３秒間隔で発光させるようなパルス回路
と、その周期を例えば０．３秒間隔に早める短絡端子３
が設けられる。４は太陽電池などの受光素子５を備えた
増幅器で、利得調整、即ちこの感知器の感度調整用の可
変抵抗器６と、増幅２Ｓ４の出力を検出するための端子
７とが設けられる。８は増幅器４の出力の所定値を検出
して動作するコンパレータで、しきい値を設定する抵抗
回路９を備えている。ｌＯは冗長回路で単発の電気的ノ
イズあるいはタバコの煙などにより感知器が誤動作しな
いように設けられ、発光回路１の出力とコンパレータ８
の出力とで動作するＡＮＤ回路とカウンタ回路とでなり
、例えば、発光回路１と同期したコンパレータ８の出力
が一定時間内に２回発生したとき出力が生じるように構
成される。１１は冗長回路１０の出力により動作し火災
信号を発生させるスイッチング回路である。In the figure, 1 is a light emitting circuit equipped with a light emitting element 2 such as an LED, which includes a pulse circuit that emits light at intervals of, for example, 3 seconds, and a short circuit terminal 3 that advances the cycle to, for example, every 0.3 seconds.
is provided. Reference numeral 4 denotes an amplifier equipped with a light receiving element 5 such as a solar cell, and is provided with a variable resistor 6 for gain adjustment, that is, sensitivity adjustment of this sensor, and a terminal 7 for detecting the output of the amplifier 2S4. A comparator 8 operates by detecting a predetermined value of the output of the amplifier 4, and is provided with a resistor circuit 9 for setting a threshold value. IO is a redundant circuit that is provided to prevent the sensor from malfunctioning due to a single electrical noise or cigarette smoke.
It is composed of an AND circuit operating with the output of the light emitting circuit 1 and a counter circuit, and is configured to generate an output when, for example, the output of the comparator 8 synchronized with the light emitting circuit 1 occurs twice within a certain period of time. 11 is a switching circuit which is operated by the output of the redundant circuit 10 and generates a fire signal.
また１２は自動化用ロボットＢの制御回路で、ＣＰＵ１
３とこのＣＰＵ１３のプログラムおよび定数などが記憶
されるＲＯＭ１４と、増幅器４の出力などデータを一時
記憶するＲＡＭ１５と、感知器の動作信号をＣＰ Ｕ１
３に入力するためのインクフェース１６と、上記増幅器
４の出力をＡ／Ｄ変換しＣＰＵ１３に入力するＡ／Ｄ変
換２Ｈ７と、可変抵抗器６を調整するドライバー１８を
回動させるモータ１９を駆動するドライバー回路２０と
で構成される。In addition, 12 is a control circuit for robot B for automation, and CPU1
3, a ROM 14 in which programs and constants of the CPU 13 are stored, a RAM 15 in which data such as the output of the amplifier 4 is temporarily stored, and an operating signal of the sensor is stored in the CPU 1.
3, an A/D converter 2H7 that A/D converts the output of the amplifier 4 and inputs it to the CPU 13, and a motor 19 that rotates a driver 18 that adjusts the variable resistor 6. It is composed of a driver circuit 20.
また第２図において、２１．２２は感知器Ａの稟２！２
３に設けられたドライバー挿入孔と接触ピン２４の挿入
孔で、これら孔を介してロボットＢのドライバー１８が
可変抵抗器６に、そして接触ピン２４が増幅器４の端子
７に接触されるように構成される。２５は天井面に設け
られるベースと嵌合される刃金具で、電源供給および火
災信号端子、３１．３２は上記短絡端子３を構成する端
子で、３２は接地端子を兼ねている。Also, in Fig. 2, 21.22 is the sign 2!2 of sensor A.
3 and the contact pin 24 insertion hole, so that the driver 18 of the robot B is brought into contact with the variable resistor 6 and the contact pin 24 is brought into contact with the terminal 7 of the amplifier 4 through these holes. configured. Reference numeral 25 denotes a blade fitting fitted to a base provided on the ceiling surface, which serves as a power supply and fire signal terminal, 31.32 a terminal constituting the short circuit terminal 3, and 32 also serves as a grounding terminal.
次に上記感知器の感度調整について説明する。Next, sensitivity adjustment of the sensor will be explained.
組立を完了した感知器Ａは、感度設定のため、感知器が
動作しなければならないと定められた所定？７４にの煙
が発生されている試験容器内に入れられ、さらに感度調
整のため自動化用のロボソ）Ｂの操作部２６が降下され
る。この降下により、ロボットＢの操作部２６のドライ
バー１８は感知器Ａの”２１Ｍ２３の挿入孔２１に、接
触ピン２４は挿入孔２２にそれぞれ挿入され、刃金具へ
の接触片２７は刃金具２５に、一対の短絡片２８は端子
３］、 ３２に接触される。そしてＣＰＵ１３は、ＲＯ
Ｍ１．１に記憶されたプログラムに従ってドライバ−１
８ヲ回動させ、可変抵抗器６を左に回し初期状態にセン
トし、接触片２７および刃金具２５を通して感知器Ａに
電源を供給する。Sensor A, which has been assembled, is set to a predetermined level that specifies that the sensor must operate in order to set its sensitivity. 74 is placed in a test container in which smoke is being generated, and furthermore, the operating section 26 of the robot robot for automation is lowered to adjust the sensitivity. Due to this lowering, the driver 18 of the operation unit 26 of the robot B is inserted into the insertion hole 21 of the "21M23" of the sensor A, the contact pin 24 is inserted into the insertion hole 22, and the contact piece 27 for the blade fitting is inserted into the blade fitting 25. , the pair of shorting pieces 28 are brought into contact with the terminals 3 and 32.The CPU 13 then connects the RO
Driver-1 according to the program stored in M1.1
8, turn the variable resistor 6 counterclockwise to the initial state, and supply power to the sensor A through the contact piece 27 and the blade fitting 25.
次にＣＰＵＬ３は、感知器のコンパレータ８が、例えば
増幅器４の０．６Ｖの出力をしきい値として反転出力さ
れるようにセットされているならば、増幅器４の出力を
その端子７に接触された接触ピン２４およびＡ／Ｄ変換
器１７を通してＣＰＵ１３に読み込む、そして増幅器４
の出力が上記しきい値０．６■より低い所定値、例えば
０，４Ｖとなるまで、ドライバー１８は急速に回動され
、可変抵抗器６の抵抗値を変化させる。Next, if the comparator 8 of the sensor is set to invert the output using the 0.6V output of the amplifier 4 as a threshold, the CPU 3 connects the output of the amplifier 4 to its terminal 7. is read into the CPU 13 through the contact pin 24 and the A/D converter 17, and the amplifier 4
The driver 18 is rapidly rotated to change the resistance value of the variable resistor 6 until the output reaches a predetermined value, for example 0.4V, which is lower than the threshold value of 0.6V.
そして、ＣＰｔＪ１３は、感度を正確に設定するために
、ドライバー１８を少し回動し停止させる。Then, the CPtJ 13 rotates the driver 18 a little and stops it in order to accurately set the sensitivity.
冗長回路１０が動作する時間を置いて再び少し回動作す
るようにし、可変抵抗器６を徐々に変化させる。このよ
うな操作により増幅器４の利得が上昇しその出力がコン
パレータ８のしきい値を越えると、コンパレーク８が動
作しその複数回の動作により冗長回路１０が動作し、ス
イッチング回路１１が働いて火災信号が発せられる。Ｃ
ＰＵ１３は、この火災信号を刃金具２５．接触片２７お
よびインタフェース１６を通じて検出し、ドライバー１
８の回動を停止させ調整を終了させる。The redundant circuit 10 is allowed to operate a few times after a period of time, and the variable resistor 6 is gradually changed. When the gain of the amplifier 4 increases due to such an operation and its output exceeds the threshold of the comparator 8, the comparator 8 operates, and the redundant circuit 10 operates due to the multiple operations, and the switching circuit 11 operates to prevent a fire. A signal is emitted. C
The PU 13 sends this fire signal to the blade fitting 25. through the contact piece 27 and the interface 16, and the driver 1
Stop the rotation of 8 to complete the adjustment.
このように調整された感知器は、火災の際に、試験容器
で発生されていた所定濃度の煙と同し濃度の煙に晒され
ると、増幅器４の出力は発光回路ｌの発光周期に同期し
３秒毎にコンパレータ８のしきい値を越え、コンパレー
タ８が動作するので、その２回目の動作により冗長回路
１０も動作し、スイッチング回路１１が働き火災信号が
発せられる。When the sensor adjusted in this way is exposed to smoke of the same concentration as the predetermined concentration of smoke generated in the test container in the event of a fire, the output of the amplifier 4 will be synchronized with the light emission period of the light emission circuit l. Since the threshold value of the comparator 8 is exceeded every 3 seconds and the comparator 8 is activated, the redundant circuit 10 is also activated by the second operation, and the switching circuit 11 is activated to issue a fire signal.
しかし、ノイズによる誤動作防止などのため上記のよう
に動作する冗長回路１０も、上記感度設定に際し、発光
回路１の短絡端子３が短絡片２日により短絡されている
場合は、その発光周期が３秒から例えば０．３秒間隔に
早められているので、それに応じて冗長回路１０の動作
する時間も短かくなり、迅速に調整が行なえる。However, when the redundant circuit 10 operates as described above to prevent malfunctions caused by noise, etc., when the shorting terminal 3 of the light emitting circuit 1 is shorted by the shorting piece 2 when setting the sensitivity, the light emitting cycle is 3. Since the time interval is advanced from seconds to, for example, 0.3 seconds, the operating time of the redundant circuit 10 is correspondingly shortened, and adjustments can be made quickly.
上記実施例では、可変抵抗器６の調整をロボットＢに行
なわせたが、挿入孔２２を介して増幅器４の出力状態を
測定しながら、可変抵抗器６をドライバーにより手で所
定値まで急速に回し、その後、徐々に回し調整するよう
にしてもよい。In the above embodiment, the robot B adjusts the variable resistor 6, but while measuring the output state of the amplifier 4 through the insertion hole 22, the variable resistor 6 is rapidly adjusted manually with a screwdriver to a predetermined value. It may be possible to turn it and then gradually adjust it by turning it.
また上記実施例では感度を増幅器４の利得を調整するこ
とにより行なったが、増幅器４の増幅度を一定とし、コ
ンパレータ８の抵抗回路９の一方の抵抗を可変抵抗器と
して、反転動作するしきい値電圧を変化させ調整するよ
うにしてもよい。Furthermore, in the above embodiment, the sensitivity was adjusted by adjusting the gain of the amplifier 4, but by setting the amplification degree of the amplifier 4 constant and using one of the resistors of the resistance circuit 9 of the comparator 8 as a variable resistor, the threshold for inverting operation was determined. Adjustment may be made by changing the value voltage.
（効 果 〉
この発明の光電式煙感知器は、感度設定に際し、感知器
外部よりドライバーを挿入でき、また所定値まで可変抵
抗器を急速に回動させることができるので、感知器が完
成された状態で節単に短時間に感度を設定することがで
きる光電式煙感知器が得られる効果がある。(Effects) In the photoelectric smoke detector of the present invention, when setting the sensitivity, a screwdriver can be inserted from outside the detector, and the variable resistor can be rapidly rotated to a predetermined value, so that the detector can be completed. The present invention has the advantage of providing a photoelectric smoke detector whose sensitivity can be easily and quickly set under certain conditions.
第１図はこの発明の光電式煙感知器の一実施例のブロッ
ク回路図、第２図は第１図の感知器の背面図、第３図は
第１図の感知器の感度をロボットにより調整する際の概
略図である。
Ａ・・・感知器、Ｂ・・・ロボット、４・・・増幅器、
５・・・受光素子、６・・・可変抵抗器、７・・・端子
、８・・・コンパレータ、９・・・抵抗回路、１日・・
・ドライバー、２１・・・ドライバー挿入孔、２２・・
・接触ピン挿入孔、２３・・・裏蓋、２４・・・接触ピ
ン。
特許出臥能美防災工業株式会社
第１図Fig. 1 is a block circuit diagram of one embodiment of the photoelectric smoke detector of the present invention, Fig. 2 is a rear view of the sensor shown in Fig. 1, and Fig. 3 shows the sensitivity of the sensor shown in Fig. 1 by a robot. It is a schematic diagram at the time of adjustment. A...sensor, B...robot, 4...amplifier,
5... Light receiving element, 6... Variable resistor, 7... Terminal, 8... Comparator, 9... Resistance circuit, 1st...
・Driver, 21...Driver insertion hole, 22...
・Contact pin insertion hole, 23...Back cover, 24...Contact pin. Patent issue Nomi Disaster Prevention Industry Co., Ltd. Figure 1
Claims (1)
のしきい値などを可変抵抗器で調整することにより感知
器の感度を設定する光電式煙感知器において、感知器の
裏蓋に、感知器内部の上記可変抵抗器を調整するための
ドライバー挿入孔と、この可変抵抗器を所定値まで急速
に回動させるために上記増幅器の出力あるいはしきい値
の状態を検出するための端子またはそれへの接触ピンを
挿入するための孔が設けられたことを特徴とする光電式
煙感知器。In photoelectric smoke detectors, the sensitivity of the detector is set by adjusting the amplifier that amplifies the output of the light receiving element or the threshold value of the comparator using a variable resistor, the above-mentioned A driver insertion hole for adjusting the variable resistor, and a terminal or a contact pin for detecting the output or threshold state of the amplifier in order to rapidly rotate the variable resistor to a predetermined value. A photoelectric smoke detector characterized by having a hole for inserting a smoke detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61280636A JP2657250B2 (en) | 1986-11-27 | 1986-11-27 | Photoelectric smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61280636A JP2657250B2 (en) | 1986-11-27 | 1986-11-27 | Photoelectric smoke detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63136196A true JPS63136196A (en) | 1988-06-08 |
| JP2657250B2 JP2657250B2 (en) | 1997-09-24 |
Family
ID=17627818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61280636A Expired - Fee Related JP2657250B2 (en) | 1986-11-27 | 1986-11-27 | Photoelectric smoke detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2657250B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010276584A (en) * | 2009-06-01 | 2010-12-09 | Texas Instr Japan Ltd | Fine particle sensing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49148878U (en) * | 1973-04-23 | 1974-12-23 | ||
| JPS6030089U (en) * | 1983-07-30 | 1985-02-28 | 松下電工株式会社 | photoelectric smoke detector |
-
1986
- 1986-11-27 JP JP61280636A patent/JP2657250B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49148878U (en) * | 1973-04-23 | 1974-12-23 | ||
| JPS6030089U (en) * | 1983-07-30 | 1985-02-28 | 松下電工株式会社 | photoelectric smoke detector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010276584A (en) * | 2009-06-01 | 2010-12-09 | Texas Instr Japan Ltd | Fine particle sensing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2657250B2 (en) | 1997-09-24 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |