JPS59210347A - Function testing machine of scattered light type smoke detector - Google Patents
Function testing machine of scattered light type smoke detectorInfo
- Publication number
- JPS59210347A JPS59210347A JP8543783A JP8543783A JPS59210347A JP S59210347 A JPS59210347 A JP S59210347A JP 8543783 A JP8543783 A JP 8543783A JP 8543783 A JP8543783 A JP 8543783A JP S59210347 A JPS59210347 A JP S59210347A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light emitting
- circuit
- emitting element
- output
- 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
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/12—Checking intermittently signalling or alarm systems
- G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits
- G08B29/145—Checking intermittently signalling or alarm systems checking the detection circuits of fire detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、散乱光式煙感知器の機能試験装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a functional testing device for a scattered light type smoke detector.
散乱光式煙感知器（以下感知器という）は、発光素子の
投光面や受光素子の受光面が汚れると失報を生じたり、
また煙検出用暗箱内壁面が汚れると誤報を生じる。そこ
で感知器は一法令上定期的にその機能を点検することが
義務づけられており、その点検は、天井面などに設置さ
れている感知器に加煙試験器によって煙を加え、所定時
間内に動作するか否かにより良否を判別したり天井面な
どから感知器を取り外して煙感知器用感度試験器にセッ
トし、この試験器で煙検出感度が正常範囲内にあるか否
かを判別することによりおこなう。Scattered light smoke detectors (hereinafter referred to as detectors) may malfunction if the light-emitting surface of the light-emitting element or the light-receiving surface of the light-receiving element becomes dirty.
Also, if the inner wall surface of the dark box for smoke detection becomes dirty, false alarms will occur. Therefore, the function of the sensor is required to be inspected periodically under one law, and this inspection is carried out by applying smoke using a smoke tester to the sensor installed on the ceiling, etc., within a specified time. To determine whether or not the sensor is working or not, or to remove the sensor from the ceiling, place it in a smoke detector sensitivity tester, and use this tester to determine whether or not the smoke detection sensitivity is within the normal range. This is done by
しかし前者では、感知器の設置場所で加煙試験器を操作
する者と、感知器が動作するか否かを受信機側で確認す
る者との最低２名を必要とすると共に、感知器の設置場
所と受信機との間の連絡方法や加煙試験器から発生する
煙によって感知器が汚れるなどの問題があり、後者では
天井面などから感知器を１台１台取り外して試験を行う
ためその手間が大変であると共に、試駁後の取付けの際
に取り付は方が不十分で接触不良を起こしたりあるいは
付は忘れなどを生じたりする。However, the former requires at least two people: one to operate the smoke tester at the location where the sensor is installed, and one to check whether the sensor is working at the receiver. There are problems such as the method of communication between the installation location and the receiver, and the fact that the detectors get dirty due to smoke generated from the smoke tester.In the latter case, the detectors are removed one by one from the ceiling etc. for testing. Not only does this take a lot of effort, but when it is installed after the test, it may not be installed properly, resulting in poor contact, or people may forget to attach it.
この発明は、上記の点に鑑み、感知器の設置場所まで出
かげることな（受信機あるいは中継器の設置場所などか
ら遠隔操作でしかも１人の者で感知器の機能試験を行う
ことを目的とする。In view of the above points, the purpose of this invention is to perform a functional test of a sensor by remote control from a receiver or repeater installation site, without having to go out to the location where the sensor is installed, and by a single person. shall be.
又、他の目的は、感知器の機能チェックを正確に行うと
共に、機能試験により感知器に支障が生じないようにす
ることである。この発明は、発光回路に抵抗値を撰択で
きる抵抗と煙検出用発光素子及び試験用発光素子とな順
次直列に接続して閉回路を形成し、かつ前記試験用発光
素子の両端子間に、該端子間を短絡するスイッチを設け
、また、前記煙検出用発光素子から直接受光することの
ない位置で、かつ前記試験用発光素子の光出力を直接受
光する位置に、煙検出用兼試験用受光素子を設け、該受
光素子の出力側を増幅回路な介してスイッチング回路で
検知する散乱光式煙感知器の機能試験装置である。Another purpose is to accurately check the function of the sensor and to ensure that the function test does not cause any trouble to the sensor. This invention provides a light emitting circuit in which a resistor whose resistance value can be selected, a light emitting element for smoke detection, and a light emitting element for testing are sequentially connected in series to form a closed circuit, and between both terminals of the light emitting element for testing. , a switch for short-circuiting the terminals is provided, and a switch for smoke detection and testing is provided at a position that does not directly receive light from the light emitting element for smoke detection, but at a position that directly receives the light output of the light emitting element for testing. This is a functional test device for a scattered light type smoke detector, in which a light receiving element is provided, and the output side of the light receiving element is detected by a switching circuit via an amplifier circuit.
以下、本発明の実施例を添付図面により説明すると、第
１図において、１は発光回路で、この発光回路１に煙検
出用発光素子２と試験用発光素子３を直列に接続し、前
記試験用発光素子３と並列にスイッチ４を接続し、また
前記煙検出用発光素子２と試験用発光素子３との直列回
路に各種の抵抗Ｒａ ｒ Ｒｂ ＨＲ（を挿入すると共
に、その抵抗を切替える切替スイッチ５を設ける。Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In FIG. 1, 1 is a light emitting circuit, and a light emitting element 2 for smoke detection and a light emitting element 3 for testing are connected in series to this light emitting circuit 1. A switch 4 is connected in parallel with the light-emitting element 3 for smoke detection, and various resistors Ra, Rb, and HR are inserted in the series circuit of the light-emitting element 2 for smoke detection and the light-emitting element 3 for testing, and a switch is installed to switch the resistances. A switch 5 is provided.
煙検出用発光素子２と試験用発光素子３の光は煙検出用
兼試験用受光累子６が受光するが、この受光素子６が、
煙検出用発光素子２の光を直接受光しないよう煙検出用
発光素子２と受光素子６との間に遮光板７を設け、又試
験用発光素子３の光を直接受光するよう該発光素子３と
該受光素子６を光ファイバなどの光学路８で結ぶ。The light from the smoke detection light emitting element 2 and the test light emitting element 3 is received by the smoke detection and test light receiving element 6.
A light shielding plate 7 is provided between the smoke detection light emitting element 2 and the light receiving element 6 so that the light from the smoke detection light emitting element 2 is not directly received, and the light emitting element 3 is provided so that the light from the test light emitting element 3 is directly received. and the light receiving element 6 are connected by an optical path 8 such as an optical fiber.
前記受光素子６の受光出刃は、増幅回路９を介してスイ
ッチング回路１ｏに入力し、スイッチング回路１０を作
動させる。The light received by the light receiving element 6 is input to the switching circuit 1o via the amplifier circuit 9, and the switching circuit 10 is activated.
第２図は、第１図の回路図であるが、以下、これらの図
面により本実施例の作動を説明すると通常はリレー１１
、１．２は不作動状態であって、切替スイッチ４，５
を構成するリレー１１の２つの接点はいずれもノーマル
クローズの位置ａにあり、また切替スイッチ５を構成す
るリレー１２の接点はノーマルオーブンの位置にあり、
試験用発光素子３は切替スイッチ４により短絡されて発
光せず、煙検出用発光素子２のみが抵抗Ｒａを通じて供
給される発光電流により第３図（１）の（イ）に示す発
光量で発光している。この時、図示しない暗箱内壁面で
、乱反射光（内部ノイズ光）が発生し受光素子６がこの
内部ノイズ光を受光してノイズ出方を生じる。暗箱内に
煙が侵入すると、煙による散乱光が生じ受光素子６は内
部ノイズ光の受光出方に煙による散乱光受光出力を加え
た受光出力を生じこの受光出力が火災レベルつまりスイ
ッチング回路１ｏの閾値に達するとスイッチング回路１
ｏが動作して火災信号を図示しない受信機に送出する。FIG. 2 is a circuit diagram of FIG. 1. Below, the operation of this embodiment will be explained with reference to these drawings. Normally, the relay 11
, 1.2 are in an inactive state, and the changeover switches 4, 5
The two contacts of the relay 11 constituting the switch 5 are both in the normally closed position a, and the contacts of the relay 12 constituting the selector switch 5 are in the normal oven position.
The test light-emitting element 3 is short-circuited by the changeover switch 4 and does not emit light, and only the smoke detection light-emitting element 2 emits light with the amount of light shown in (a) of FIG. 3(1) due to the light-emitting current supplied through the resistor Ra. are doing. At this time, diffusely reflected light (internal noise light) is generated on the inner wall surface of the dark box (not shown), and the light receiving element 6 receives this internal noise light, causing noise. When smoke enters the dark box, scattered light is generated by the smoke, and the light receiving element 6 generates a light receiving output that is the sum of the light receiving output of the internal noise light and the light receiving output of the light scattered by the smoke.This light receiving output is at the fire level, that is, the switching circuit 1o. When the threshold is reached, switching circuit 1
o operates and sends a fire signal to a receiver (not shown).
これを正常な状態（内部ノイズ光の受光出方は第３図（
３） 、 （４）の（イ））とする。前記受光素子６の
受光面が汚染したりすると、受光素子６出カは、低下し
このため内部ノイズ光の量が正常状態と同じとすると受
光素子６の受光出方は汚染の度合に比例して低下するの
で火災時には煙による散乱光の量が正常状態より大きく
なげれば、つまり煙濃度が濃くならないと受光素子６の
受光出力は火災レベルに達せず失報を生じることとなる
（第３図（６）の（イ））。また暗箱内壁面にゴミが堆
積すると内部ノイズ光が増加し受光素子６のノイズ光出
力が正常状態より増加するので煙による散乱光の量が正
常な状態より少ない衛で、つまり煙濃度が所定レベルに
達しな（ても受光素子６の受光出力は火災レベルに達す
るので誤報な生じる（第３図（５）の（イ）ン。This is the normal state (Figure 3 shows how the internal noise light is received and output).
3), (4) (a)). When the light-receiving surface of the light-receiving element 6 becomes contaminated, the output of the light-receiving element 6 decreases. Therefore, assuming that the amount of internal noise light is the same as in a normal state, the way the light-receiving element 6 outputs light is proportional to the degree of contamination. Therefore, in the event of a fire, if the amount of light scattered by smoke becomes greater than the normal state, that is, unless the smoke density becomes dense, the light receiving output of the light receiving element 6 will not reach the fire level and a false alarm will occur (third Figure (6) (a)). In addition, when dust accumulates on the inner wall of the dark box, internal noise light increases and the noise light output of the light receiving element 6 increases more than the normal state, so the amount of light scattered by smoke is less than the normal state, that is, the smoke density is at the predetermined level. Even if the light receiving output of the light receiving element 6 reaches the fire level, a false alarm will occur ((a) in Fig. 3 (5)).
次に機能試験について説明すると、図示しない受信機な
どから不作動試験信号を受信するとトランジスタ１５が
ＯＦＦとなりＲ−Ｓラッチ１３がセットされてリレー１
１が動作し切替スイッチ４，５のリレー１１の接点が切
り換り試験用発光素子３は短絡が解除され、煙検出用発
光素子２は、端子すの抵抗Ｒ１）に接続される。これに
より煙検出用発光素子２と試験用発光素子３とは抵抗Ｒ
１）を通じて供給される発光電流により煙検出用発光素
子２は第３図（１）の（ロ）に、また試験用発光素子３
は第３図（２）の（ロ）に示す発光量でそれぞれ発光す
る。前記受光素子６は試験用発光素子３からの直接光と
試験用発光素子３ならびに煙検出用発光素子２から発せ
られた光の壁面乱反射光とを受光して機能が正常であれ
ば第３図（３）の（ロ）または第３図（４）の（ロ）に
示す受光出力を生じる。この受光出力は火災レベル以下
、つまりスイッチング回路１０の閾値以下であるのでス
イッチング回路ｌＯは動作せず、受信機に信号を送出し
ない。しかし内部ノイズ光が増大するような状態であれ
ば第３図（５）の（ロ）に示す火災レベル以上の受光出
力を生じスイッチング回路１０が動作して信号を送出し
、受光素子６の受光面が汚染されていれば第３図（６）
の（ＣＩ）に示す火災レベル以下の受光出力を生じ、ス
イッチング回路１０は動作しない。Next, to explain the function test, when an inoperation test signal is received from a receiver (not shown), the transistor 15 is turned OFF, the R-S latch 13 is set, and the relay 1
1 operates, the contacts of the relays 11 of the changeover switches 4 and 5 are switched, the test light emitting element 3 is released from short circuit, and the smoke detection light emitting element 2 is connected to the resistor R1 of the terminal. As a result, the smoke detection light emitting element 2 and the test light emitting element 3 have a resistance R
1), the light emitting element 2 for smoke detection is changed to (b) of FIG. 3(1), and the light emitting element 3 for testing is
emit light with the amount of light shown in (b) of FIG. 3(2). If the light receiving element 6 receives the direct light from the test light emitting element 3 and the diffusely reflected light from the wall surface of the light emitted from the test light emitting element 3 and the smoke detection light emitting element 2, and the function is normal, as shown in FIG. The light receiving output shown in (3) (b) or FIG. 3 (4) (b) is produced. Since this received light output is below the fire level, that is, below the threshold of the switching circuit 10, the switching circuit 10 does not operate and does not send a signal to the receiver. However, if the internal noise light increases, the light receiving output exceeds the fire level shown in (b) of FIG. If the surface is contaminated, Figure 3 (6)
The received light output is below the fire level shown in (CI), and the switching circuit 10 does not operate.
また、図示しない受信機などから作動試験信号を受信す
るとトランジスタ１５と１６がオフとなりＲ−Ｓラッチ
１３がリセットされてＲ−Ｓラッチ１４がセットされ、
リレー１１は動作を継続しその接点である切替スイッチ
４は開放状態をまた切替スイッチ５は端子すの接続を維
持するとともにリレー１２が動作して切替スイッチ５の
リレー１２の接点が端子Ｃに接続される。When an operation test signal is received from a receiver (not shown), transistors 15 and 16 are turned off, R-S latch 13 is reset, and R-S latch 14 is set.
The relay 11 continues to operate, and the changeover switch 4, which is its contact, remains open, and the changeover switch 5 maintains the terminal connection, and the relay 12 operates, and the contact of the relay 12 of the changeover switch 5 is connected to the terminal C. be done.
これにより煙検出用と試験用の両発光素子２と３とには
抵抗Ｒ１）とＲＣとの並列回路を通じて発光電流が供給
され、発光素子２は第３図（１）の（ハ）に示す。また
発光素子３は第３図（２）の（ハ）に示す発光量でそれ
ぞれ発光する。そして、受光素子６は上記のように両発
光素子２と３とからの光を受光し、機能が正常であれば
第３図（３）または（４）の（ハ）に示す火災レベル以
上の受光出力を生じ、また内部ノイズ光が増大するよう
な状態であれば第３図（５）の（ハ）に示す火災レベル
以上の受光出力を生じ、いずれの場合にもスイッチング
回路１０が動作して受信機に信号を送出す乞。しかし受
光素子６の受光面が汚染されていれば第３図（６）の（
ハ）に示す火災レベル以下の受光出力を生じるのでスイ
ッチング回路１０は動作しない。As a result, a light emitting current is supplied to both the light emitting elements 2 and 3 for smoke detection and testing through the parallel circuit of the resistor R1) and RC, and the light emitting element 2 is shown in (c) of FIG. 3(1). . Further, the light emitting elements 3 each emit light with the amount of light shown in (c) of FIG. 3(2). The light-receiving element 6 receives the light from both the light-emitting elements 2 and 3 as described above, and if the function is normal, the fire level is higher than the fire level shown in (c) of Figure 3 (3) or (4). In addition, if the internal noise light increases, the received light output exceeds the fire level shown in (c) of FIG. 3 (5), and in either case, the switching circuit 10 does not operate. to send a signal to the receiver. However, if the light-receiving surface of the light-receiving element 6 is contaminated, (6) (
Since the received light output is below the fire level shown in c), the switching circuit 10 does not operate.
このように感知器は、機能が正常であれば、不作動試験
信号を受信した時は信号を送出せず、作動試験信号を受
信した時にのみ信号を送出する。また機能が誤報を生じ
る時には、不作動試験信号を受信した時も作動試験信号
を受信した時にも信号を送出する。また失報を生じる時
には、不作動試験信号を受信した時も作動試験信号を受
信した時にも信号を送出しない。従って試験時に図示し
ない受信機側などにおいて感知器からの信号返信状態を
識別することにより、感知器が正常かあるいは誤報また
は失報を生じる状態かを判別できる。そして試験終了後
、図示しない受信機などから復旧信号が送出されると、
トランジスタ１５．１６と１７がＯＦＦとなってＲ−Ｓ
ラッチ１３，１４．１８がリセットされて試験開始前の
状態に復旧される。In this way, if the sensor is functioning normally, it will not send out a signal when it receives an inoperative test signal, but will only send out a signal when it receives an operating test signal. Also, when a function generates a false alarm, a signal is sent both when an inoperative test signal is received and when an operational test signal is received. Furthermore, when a misreport occurs, no signal is sent out either when an inoperation test signal is received or when an operation test signal is received. Therefore, by identifying the signal return state from the sensor on the receiver side (not shown) during testing, it is possible to determine whether the sensor is normal or in a state where a false alarm or failure occurs. After the test is finished, when a recovery signal is sent from a receiver (not shown),
Transistors 15, 16 and 17 are turned off and R-S
The latches 13, 14, and 18 are reset and restored to the state before the start of the test.
ところで試験時の両発光素子２と３との発光量は、上記
から明らかなように不作動試験の場合には、煙検出用受
光素子６の火災監視時における受光出力が第３図（３）
に示すように正常レベルの上限近くにある場合に試験時
の受光出力が火災レベルに達しないように、また火災監
視時の受光出力が第３図（５）に示すように正常レベル
の上限値を僅かに越えている時には、試験時の受光出力
が火災レベルに達するように抵抗Ｒ１）で調整し、作動
試駆の場合には受光素子６の火災監視時の受光出力が第
３図（４）に示すように正常レベルの下限値近くにある
場合に、試験時の受光出力が火災レベルに達するように
、また火災監視時の受光出力が第３図（６）に示すよう
に正常レベルの下限値を僅かに下回っている時には、試
験時の受光出力が火災レベルに達しないように抵抗Ｒｂ
とＲｅを調整する。By the way, as is clear from the above, the amount of light emitted by both light emitting elements 2 and 3 during the test is as shown in Fig. 3 (3) in the case of the non-operation test, the light receiving output of the smoke detection light receiving element 6 during fire monitoring.
As shown in Figure 3 (5), the received light output during the test does not reach the fire level when it is near the upper limit of the normal level, and the received light output during fire monitoring is set to the upper limit of the normal level as shown in Figure 3 (5). If it slightly exceeds the level, adjust the light receiving output during the test with the resistor R1) so that the light receiving output reaches the fire level, and in the case of an operation trial, the light receiving output of the light receiving element 6 during fire monitoring is adjusted to the level shown in Figure 3 (4). ), as shown in Figure 3 (6), so that the received light output during the test reaches the fire level when it is near the lower limit of the normal level, and when the received light output during fire monitoring is near the lower limit of the normal level, as shown in Figure 3 (6). When it is slightly below the lower limit value, resistor Rb is set so that the received light output during the test does not reach the fire level.
and adjust Re.
試験用発光素子３の配食は、受光素子６を直接照射でき
る位置、例えば、受光素子と完全に対向する上方の位置
やあるいは受光素子の右斜め上方に設けるようにして光
ファイバなど力光学路を省略するようにしてもよい。な
お、光学路を用いる場合、光学路に光透過性の高い物を
使用すれは、試験時の発光電流値を、通常の発光電流値
に比べ非常に小さくでき、従って煙検出用発光素子の発
光量を抑制できるので試験時に煙検出用暗箱内に煙が存
在している場合や壁面が汚れている場合に、それらから
の散乱光や反射光の影響を減少でき、正確な機能試験が
実施できる。The test light-emitting element 3 is placed in a position where the light-receiving element 6 can be directly irradiated, for example, at an upper position completely facing the light-receiving element, or diagonally above and to the right of the light-receiving element, and connected to a power optical path such as an optical fiber. may be omitted. In addition, when using an optical path, if a highly transparent material is used for the optical path, the light emitting current value during the test can be much smaller than the normal light emitting current value, and therefore the light emitting element of the smoke detection light emitting element can be Since the amount of smoke can be suppressed, if there is smoke in the smoke detection dark box or the wall surface is dirty during testing, the influence of scattered light and reflected light from them can be reduced, allowing accurate functional tests to be performed. .
次に本発明の他の実施例を、第４図および第４図の回路
図である第５図により説明するが、前記実施例と太き（
異なるのは、増幅回路とスイッチング回路とを、比較回
路および記憶回路を介して接続したことであり、通常は
火災監視と機能監視の両方を行なって機能監視の結果を
記憶し、受信機などから試験信号を受信した時は、試験
信号受信直前の機能監視結果の記憶に基づいて正常信号
または異常信号を送出するよ５にした点である。即ち、
発光回路１に煙検出用発光素子２と試験用発光素子３を
直列に接続し、前記試験用発光素子３と並列にスイッチ
４を接続し、また前記煙検出用発光素子２と試験用発光
素子３との直列回路に抵抗ｒ１＋ｒ２を挿入すると共に
、その抵抗ｒ、 、 ｒ２を切り換える切替スイッチ５
を設ける。煙検出用発光素子２と試験用発光素子３の光
は、煙検出用無試験用受光素子６が受光するが、この受
光素子６が煙検出用発光素子２の光を直接受光しないよ
う煙検出用発光素子２と受光素子６との間に遮光板７を
設け、又試験用発光素子３の光を直接受光するよう該発
光紫子疫該受光素子６を光ファイバなどの光学路８で結
ぶ。Next, another embodiment of the present invention will be explained with reference to FIG. 4 and FIG. 5 which is a circuit diagram of FIG.
The difference is that the amplifier circuit and the switching circuit are connected via a comparison circuit and a memory circuit, and normally both fire monitoring and function monitoring are performed, the results of the function monitoring are stored, and the results are stored from a receiver etc. When a test signal is received, a normal signal or an abnormal signal is sent out based on the memory of the function monitoring result immediately before receiving the test signal. That is,
A light emitting element 2 for smoke detection and a light emitting element 3 for testing are connected in series to a light emitting circuit 1, a switch 4 is connected in parallel to the light emitting element 3 for testing, and a light emitting element 2 for smoke detection and a light emitting element for testing are connected in series. A changeover switch 5 that inserts resistors r1+r2 into the series circuit with 3 and switches the resistors r, , r2.
will be established. The light from the smoke detection light emitting element 2 and the test light emitting element 3 is received by the non-test light receiving element 6 for smoke detection. A light-shielding plate 7 is provided between the light-emitting element 2 for testing and the light-receiving element 6, and the light-emitting element 6 is connected with an optical path 8 such as an optical fiber so as to directly receive the light from the light-emitting element 3 for testing. .
前記受光素子６は、増幅回路９に接続され該増幅回路９
は、比較回路２０に接続されている。The light receiving element 6 is connected to an amplifier circuit 9.
is connected to the comparison circuit 20.
この比較回路２０は、火災比較器２７．失報比較器２５
．誤報比較器２６からなり、火災比較器２７をスイッチ
ング回路１０に接続すると共に、失報比較器２５．誤報
比較器２６を、感知器機能状態を記憶する記憶回路２１
に接続し、該記憶回路２１を前記スイッチング回路１０
に接続する。なお、第４図、第５図において、第１図、
第２図と同一図面符号の部分は、その機能も作用も同一
である。This comparison circuit 20 includes a fire comparator 27. Misreport comparator 25
．． It consists of a false alarm comparator 26, a fire comparator 27 is connected to the switching circuit 10, and a false alarm comparator 25. A storage circuit 21 stores the false alarm comparator 26 and the sensor function state.
and connect the memory circuit 21 to the switching circuit 10.
Connect to. In addition, in Fig. 4 and Fig. 5, Fig. 1,
Portions with the same drawing symbols as in FIG. 2 have the same functions and operations.
次に本笑施例の作動について説明すると、通常はＪ−Ｋ
Ｆ／Ｆ ２３の第６図に示す様なＱ出力（分周回路３５
のｆ／２１ 出力によりＨ，Ｌを交互に出力）により
リレー２４がＯＮ 、 ＯＦＦを繰り返し、その接点で
ある切替スイッチ４と５を開閉する。通常、すなわち火
災監視時、リレ〜２４はＯＦＦで、切替スイッチ５は、
ノーマルクローズの位置ａにあるので抵抗ｒ１を通じて
大電流Ｉ□の発光電流が流れる。しかし切替スイッチ４
は閉成しているので試験用発光素子３は、短絡状態にあ
り煙検出用発光素子２にのみ発光電流工。Next, to explain the operation of this example, normally J-K
Q output (divider circuit 35) as shown in Figure 6 of F/F 23
f/21 output (which alternately outputs H and L) causes the relay 24 to repeatedly turn on and off, opening and closing the changeover switches 4 and 5, which are its contacts. Normally, during fire monitoring, the relay 24 is OFF and the selector switch 5 is
Since it is in the normally closed position a, a large light emitting current I□ flows through the resistor r1. However, the changeover switch 4
Since it is closed, the test light-emitting element 3 is in a short-circuited state, and only the light-emitting element 2 for smoke detection has a light-emitting current.
が流れて第６図に示す様に大発光景で発光し、煙検出用
発光素子６は、煙検出用発光素子２の発光による暗箱内
壁面での乱反射光などのノイズ光を受光して、第６図に
示す受光出方を生じる。機能監視時、リレー２４はＯＮ
で、切替スイッチ４が開成して試験用発光素子３の短絡
が解除されると共に、切替スイッチ５が位置ａがらノー
マルオーブンの位置すに切り換わり煙検出用発光素子２
と試験用発光素子３には抵抗ｒ２を通じて第６図に示す
小電流工２の発光電流が供給される。この発光電流■２
によって発光素子２゜３は、第６図に示す様に小発光量
で発光し受光素子６は発光素子２の発光によるノイズ光
と発光素子３の直接光とを受光して第６図に示す受光出
力を生ずる。なお、第６図は感知器機能が正常な場合の
タイムチャートで（１）は火災監視時（２）は機能監視
時を示す。flows and emits light in a large emission scene as shown in FIG. The way the light is received and emitted as shown in FIG. 6 is produced. During function monitoring, relay 24 is ON
Then, the changeover switch 4 is opened and the short circuit of the test light emitting element 3 is released, and the changeover switch 5 is switched from the position a to the normal oven position, and the smoke detection light emitting element 2 is switched from the position a to the normal oven position.
The light emitting current of the small current generator 2 shown in FIG. 6 is supplied to the test light emitting element 3 through the resistor r2. This light emitting current ■2
Accordingly, the light emitting element 2.3 emits light with a small amount of light as shown in FIG. Generates light receiving output. In addition, FIG. 6 is a time chart when the sensor function is normal, and (1) shows the time of fire monitoring and (2) shows the time of function monitoring.
機能判別は、失報比較器２５によって増幅回路９の受光
反転増幅出方が失報レベルである正常レベル範囲の下限
値に達したか否かが判別され、誤報比較器２６によって
増幅回路９の受光反転増幅出力が誤報レベルである正常
レベル範囲の上限値に達したか否かが判別される。比較
器２５〜２７の基準レベル電圧は、火災比較器２７〉失
報比較器２５〉誤報比較器２６となっているが、これは
試験時に火災比較器２７を強制的に動作させて火災発生
の際に使用する回路部分σ）動作をチェックするためで
ある。機能監視時に受光出力が正常レベル範囲内である
と失報比較器２５と誤報比較器２６は共にＬ出力となり
ＡＮＤ回路２９は、１１出力を生じるのでＤ−Ｆ／Ｆ
３０のＱ出力は、正常を示すＩ（レベルとなり受光出力
が正常レベル範囲外であると失報比較器２５と誤報比較
器２６のいずれか一方がＨ出力となるのでＡＮＤ回路２
９はＬ出力となりＤ−Ｆ／Ｆ ３０のＱ出力は、異常を
示すＬレベルとなる。In the function determination, the false alarm comparator 25 determines whether the light receiving, inverting, and amplifying output of the amplifier circuit 9 has reached the lower limit of the normal level range, which is the false alarm level, and the false alarm comparator 26 determines whether the light receiving, inverting, and amplifying output of the amplifier circuit 9 has reached the lower limit of the normal level range, which is the false alarm level. It is determined whether the received and inverted amplified output has reached the upper limit of the normal level range, which is the false alarm level. The reference level voltages of the comparators 25 to 27 are as follows: fire comparator 27 > false alarm comparator 25 > false alarm comparator 26. This is because the fire comparator 27 is forced to operate during the test to prevent a fire from occurring. This is to check the operation of the circuit portion σ) used during the test. When the received light output is within the normal level range during function monitoring, both the false alarm comparator 25 and the false alarm comparator 26 output L, and the AND circuit 29 produces 11 outputs, so the D-F/F
The Q output of 30 is I (level) indicating normality, and if the received light output is outside the normal level range, either the misreport comparator 25 or the false alarm comparator 26 becomes an H output, so the AND circuit 2
9 becomes an L output, and the Q output of the D-F/F 30 becomes an L level indicating an abnormality.
このＤ−Ｆ／Ｆ３０のＱ出力のＬレベルは受光出力が正
常レベル範囲外にある間は、持続し、受光出力が正常レ
ベル範囲内に戻るとＱ出力はＨレベルとなる。The L level of the Q output of the DF/F 30 continues while the received light output is outside the normal level range, and when the received light output returns to within the normal level range, the Q output becomes H level.
図示しない受信機などから試験信号を受信するとトラン
ジスタ３６がＯＦＦとなってＲ−Ｓラッチ３１がセット
されリレー２４がＯＮ状態となり増幅回路９には、煙検
出用発光素子２と試験用発光素子３の光を受けた受光素
子６の火災レベル以上の受光出力が入力する。この時そ
の直前まで受光出力が正常レベル範囲内でＤ−Ｆ／Ｆ３
０のＱ出力がＨレベルであり、かつ全回路が正常であれ
ば火災比較器２７の火災監視時のし出力によりＲ−８ラ
ツチ３２のＱ出力がＨにセットされてゲート３３が開か
れ正常信号が図示しブよい受信機などに送出される。ま
たその直前の受光出力が誤報状態にあると、Ｒ−８ラツ
チ３２は、正常時同様受光素子６の受光出力による火災
比較器２７の火災監視時のＬ出力によりセットされてゲ
ート３３が開かれるがＤ−Ｆ／Ｆ ３０のＱ出力が異常
を示すし状態にあるので正常信号とは異なる繰り返し周
波数の異常信号を図示しない受信機などに送出する。When a test signal is received from a receiver (not shown), the transistor 36 is turned OFF, the R-S latch 31 is set, the relay 24 is turned ON, and the amplifier circuit 9 includes the smoke detection light emitting element 2 and the test light emitting element 3. The light-receiving output of the light-receiving element 6 that receives the light is inputted at a level higher than the fire level. At this time, until just before that, the received light output was within the normal level range and D-F/F3
If the Q output of R-8 latch 32 is at H level and all circuits are normal, the Q output of R-8 latch 32 is set to H by the fire monitoring output of fire comparator 27, and gate 33 is opened, indicating normal operation. The signal is sent to a receiver, as shown. Also, if the previous light reception output is in a false alarm state, the R-8 latch 32 is set by the L output of the fire comparator 27 during fire monitoring based on the light reception output of the light receiving element 6, and the gate 33 is opened, as in the normal state. Since the Q output of the D-F/F 30 is in a state indicating an abnormality, an abnormal signal having a repetition frequency different from that of the normal signal is sent to a receiver (not shown) or the like.
またその直前の受光出力が失報状態にあるとｎ−ｓラッ
チ３２は誤報時と同様にＨにセットされこれによりゲー
ト３３が開かれて異常信号が受信機などに送出される。If the previous light reception output is in a misreport state, the n-s latch 32 is set to H as in the case of a false alarm, thereby opening the gate 33 and sending an abnormal signal to the receiver or the like.
発光素子２，３が断線などにより発光を停止して煙検出
用無試験用受光素子６に受光出力を生じなくなると、Ａ
ＮＤ回路２９は、１■出力を生じなくなるのでＤ −Ｆ
／Ｆ３０のＱ出力ばＬ状態になる。When the light emitting elements 2 and 3 stop emitting light due to a disconnection or the like and no longer produce light reception output to the untested light receiving element 6 for smoke detection, A.
The ND circuit 29 no longer produces 1■ output, so D -F
The Q output of /F30 is in the L state.
そして受信機などから試験信号を受信してＲ−８ラツチ
３１カーセツトされてリレー２４がＯＮ状態となっても
受光素子６は受光出力を生じていないので、上記と異な
り火災比較器２７は、■出力を継続してＡＮＤ回路３４
は、Ｈ出力を生ぜずこれによりＲ−Ｓラッチ３２のＱ出
力はＨにセットされず、Ｌを持続する。Even if a test signal is received from a receiver or the like, the R-8 latch 31 is set, and the relay 24 is turned on, the light receiving element 6 does not produce any light receiving output, so unlike the above, the fire comparator 27 Continuing the output, AND circuit 34
does not produce an H output, so the Q output of the R-S latch 32 is not set to H but remains at L.
このためゲート３３は開かれていないので試験信号を受
信したのにかかわらず受傷機などに信号を送出しない。Therefore, since the gate 33 is not opened, no signal is sent to the injured machine etc. even though the test signal is received.
このように図示しない受信機側などにおいて試験信号を
送出した後の感知器からの返信状態が正常信号か異常信
号か、または、無信号であるかを判別することにより感
知器の機能が正常（正常信号受信時）か、機能が失報ま
たは誤報を生じる状態（異常信号受信時）か、または、
感知器が故障を生じている（無信号状態）かを判別でき
る。In this way, the function of the sensor is determined to be normal ( (when a normal signal is received), or the function is in a state where it misses or false alarms (when an abnormal signal is received), or
It can be determined whether the sensor is malfunctioning (no signal state).
そして試験終了後、図示しない受信機などから復旧信号
が送出されると、トランジスタ３６と３７がＯＦＦとな
ってＲ−Ｓラッチ３１と３２がリセットされＤ−Ｆ／Ｆ
３０がクリアされて試験開始前の状態に復旧される。After the test is finished, when a recovery signal is sent from a receiver (not shown), transistors 36 and 37 are turned off, R-S latches 31 and 32 are reset, and the D-F/F
30 is cleared and the state before the start of the test is restored.
第１および第２発明は以上のように構成したので受信機
などの設置場所から遠隔操作によりＬかも１人で感知器
の機能試験が行なえ、又、通常は、煙検出用発光素子の
光のみから生ずる受光素子の受光出力により火災現象の
有無を判別し、試験時には、煙検出用発光素子の光およ
び試験用発光素子より生ずる受光素子の受光出力の大き
さにより感知器機能が正常か異常かを判別することがで
きる。Since the first and second inventions are configured as described above, a single person can perform a functional test of the sensor by remote control from the location where the receiver is installed, and normally only the light from the light emitting element for smoke detection can be tested. The presence or absence of a fire phenomenon is determined based on the light reception output of the light receiving element generated from the smoke detection light emitting element, and during the test, it is determined whether the sensor function is normal or abnormal based on the light from the light emitting element for smoke detection and the magnitude of the light reception output of the light receiving element generated from the test light emitting element. can be determined.
更に、本発明は、煙を用いて試験をしないので、発光素
子の投光面や受光面の受光素子などを汚すことがな（、
又、その試験結果も煙を用いた試験方法と同様のものが
得られる。Furthermore, since the present invention does not use smoke for testing, it does not contaminate the light emitting surface of the light emitting element or the light receiving element on the light receiving surface.
Also, the test results are similar to those obtained by the test method using smoke.
第１図は第１の発明の実施例を示すブロック図、第２図
は、第１図の回路図、第３図は、監視時および試験時に
おける受光素子の受光出力などを示す図、第４図は、本
発明の他の実施例を示すブロック図、第５図は、第４図
の回路図、第６図は、火災監視時および機能監視時にお
けるタイムチャートである。
１ ・・・・・・発光回路
２ ・・・・・・煙検出用発光素子
３ ・・・・・・試験用発光素子
４．５・・・切替スイッチ
６ ・・・・・・煙検出用兼試験用発光素子９ ・・・
・・・増幅回路
１０ ・・・・・・スイッチング回路
２０ ・・・・・・比較回路
２１・・・記憶回路
外２名FIG. 1 is a block diagram showing an embodiment of the first invention, FIG. 2 is a circuit diagram of FIG. 1, FIG. 3 is a diagram showing the light receiving output of the light receiving element during monitoring and testing, FIG. 4 is a block diagram showing another embodiment of the present invention, FIG. 5 is a circuit diagram of FIG. 4, and FIG. 6 is a time chart during fire monitoring and function monitoring. 1...Light-emitting circuit 2...Light-emitting element for smoke detection 3...Light-emitting element for test 4.5...Switch switch 6...For smoke detection Light-emitting element 9 for combined testing...
...Amplification circuit 10 ...Switching circuit 20 ...Comparison circuit 21 ...2 people outside the memory circuit
Claims (1)
光素子及び試験用発光素子とな順次直列に接続して閉回
路を形成し、かつ前記試験用発光素子の両端子間に、該
端子間を短絡するスイッチを設けまた、前記煙検出用発
光素子から直接受光することのない位置で、かつ前記試
験用発光素子の光出力を直接受光する位置に、煙検出用
兼試験用受光素子を設け、該受光素子の出力側を増幅回
路を介してスイッチング回路で検知する散乱光式煙感知
器の機能試験装置。 ２、抵抗値を選択できる抵抗をＲａ ｒ Ｒｂ Ｊ Ｒ
Ｃとしたことを特徴とする特許請求の範囲第１項記載の
散乱光式煙感知器の機能試験装置。 ３、抵抗値を撰択できる抵抗をｒ１１ｒ２とし、また増
幅回路の出力端子に比較回路を接続し、該比較回路に感
知器機能状態を記憶する記憶回路を接続すると共に該記
憶回路をスイッチング回路に接続した特許請求の範囲第
１項記載の散乱光式煙感知器の機能試験装置。[Scope of Claims] 1. In a light emitting circuit, a resistor whose resistance value can be selected, a smoke detection light emitting element, and a test light emitting element are sequentially connected in series to form a closed circuit, and the test light emitting element A switch for short-circuiting the terminals is provided between both terminals of the smoke detecting light emitting element, and a switch is provided between the two terminals of the smoke detecting light emitting element at a position that does not directly receive light from the light emitting element for smoke detection, but at a position that directly receives the light output of the light emitting element for testing. A functional test device for a scattered light smoke detector, which includes a light receiving element for detection and testing, and detects the output side of the light receiving element by a switching circuit via an amplifier circuit. 2. Ra r Rb J R resistor whose resistance value can be selected
A function testing device for a scattered light type smoke detector according to claim 1, characterized in that the function test device is set as C. 3. A resistor whose resistance value can be selected is r11r2, a comparison circuit is connected to the output terminal of the amplifier circuit, a memory circuit for storing the sensor function state is connected to the comparison circuit, and the memory circuit is connected to the switching circuit. A functional testing device for a scattered light smoke detector according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8543783A JPS59210347A (en) | 1983-05-16 | 1983-05-16 | Function testing machine of scattered light type smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8543783A JPS59210347A (en) | 1983-05-16 | 1983-05-16 | Function testing machine of scattered light type smoke detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59210347A true JPS59210347A (en) | 1984-11-29 |
| JPH0143262B2 JPH0143262B2 (en) | 1989-09-19 |
Family
ID=13858831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8543783A Granted JPS59210347A (en) | 1983-05-16 | 1983-05-16 | Function testing machine of scattered light type smoke detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59210347A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0396834A (en) * | 1989-09-08 | 1991-04-22 | Takagi Ind Co Ltd | Concentration measuring instrument |
| JPH0396839A (en) * | 1989-09-08 | 1991-04-22 | Takagi Ind Co Ltd | Concentration measuring instrument |
| EP0658865A1 (en) * | 1993-12-16 | 1995-06-21 | Nohmi Bosai Ltd. | Smoke detector arrangement |
| EP3985631A1 (en) * | 2020-10-15 | 2022-04-20 | Siemens Schweiz AG | Optical smoke detector |
-
1983
- 1983-05-16 JP JP8543783A patent/JPS59210347A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0396834A (en) * | 1989-09-08 | 1991-04-22 | Takagi Ind Co Ltd | Concentration measuring instrument |
| JPH0396839A (en) * | 1989-09-08 | 1991-04-22 | Takagi Ind Co Ltd | Concentration measuring instrument |
| EP0658865A1 (en) * | 1993-12-16 | 1995-06-21 | Nohmi Bosai Ltd. | Smoke detector arrangement |
| EP3985631A1 (en) * | 2020-10-15 | 2022-04-20 | Siemens Schweiz AG | Optical smoke detector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0143262B2 (en) | 1989-09-19 |
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