JPH0546000B2 - - Google Patents
Info
- Publication number
- JPH0546000B2 JPH0546000B2 JP1199986A JP19998689A JPH0546000B2 JP H0546000 B2 JPH0546000 B2 JP H0546000B2 JP 1199986 A JP1199986 A JP 1199986A JP 19998689 A JP19998689 A JP 19998689A JP H0546000 B2 JPH0546000 B2 JP H0546000B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- circuit
- signal
- smoke detection
- emitting element
- 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 - Lifetime
Links
- 239000000779 smoke Substances 0.000 claims description 42
- 238000001514 detection method Methods 0.000 claims description 35
- 238000012360 testing method Methods 0.000 claims description 23
- 238000007689 inspection Methods 0.000 description 13
- 238000012544 monitoring process Methods 0.000 description 7
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000011990 functional testing Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Description
【発明の詳細な説明】
この発明は、光電式煙感知器の機能検査装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a functional testing device for a photoelectric smoke detector.
光電式煙感知器（以下感知器という）は、発光
素子の投光面と受光素子の受光面の汚れにより失
報を生じ、又、煙検出用暗箱壁面の汚れにより誤
報を生じたりする。そこで、法令上定期的に感知
器の機能を点検することが義務づけられている。 A photoelectric smoke detector (hereinafter referred to as a sensor) may cause false alarms due to dirt on the light emitting surface of the light emitting element and the light receiving surface of the light receiving element, and may also produce false alarms due to dirt on the wall surface of the dark box for smoke detection. Therefore, it is required by law to periodically check the function of the sensor.
従来、この種の装置として、常時発光する第１
光源と、該第１光源の光線が直接入射しない位置
に設けた第１受光素子と、前記第１光源の光軸上
に設けた第２受光素子と、前記第１受光素子の受
光軸上に設け、かつ、火災受信機からの制御信号
と前記第２受光素子の受光出力との一致により発
光する第２光源からなり、該第２光源からの光線
を前記第１受光素子に直接入射させて動作試験を
行う装置が提案されている。（特開昭50−119688
号参照）
しかし、この装置では、第２光源は、第２受
光素子が受光出力を生じ、かつ受信機が制御信号
を受信した時にのみ発光して試験を行うもので、
常時機能を監視していなて。しかも、この際の
第２発光素子の発光量は、第２受光素子の受光出
力によつて変化せず、常に一定の発光量である。
又、この装置は、単に感知器が動作するか否か
の試験を行うだけで感知器の感度を知ることはで
きない。 Conventionally, as this type of device, the first
a light source, a first light receiving element provided at a position where the light beam of the first light source does not directly enter, a second light receiving element provided on the optical axis of the first light source, and a second light receiving element provided on the optical axis of the first light receiving element. and a second light source that emits light when a control signal from a fire receiver matches a light receiving output of the second light receiving element, and the light beam from the second light source is directly incident on the first light receiving element. Devices for performing operational tests have been proposed. (Unexamined Japanese Patent Publication No. 50-119688
However, in this device, the second light source emits light for testing only when the second light-receiving element produces a light-receiving output and the receiver receives a control signal.
Please keep an eye on the functionality at all times. Furthermore, the amount of light emitted by the second light emitting element at this time does not change depending on the light receiving output of the second light receiving element, and is always a constant amount of light emitted.
Furthermore, this device cannot determine the sensitivity of the sensor by simply testing whether the sensor is working or not.
感知器の感度が正常でないと、火災でもないの
に火災を感知したり（誤報）、逆に火災なのに火
災を感知しなかつたり（失報）するので、感知器
としては致命的な欠陥となる。 If the sensitivity of the detector is not normal, it will detect a fire even though it is not a fire (false alarm), or conversely, it will not detect a fire even though there is a fire (false alarm), resulting in a fatal defect in the detector. .
本発明は、上記の点に鑑み、感知器の機能を
常時監視し、感知器が動作するか否かの試験を行
い、又、感知器の感度が正常範囲にあるか否か
を試験する機能検査装置を提供することを目的と
する。他の目的は、感知器の設置場所まで出か
けることなく受信機などの遠隔操作により感知器
の機能検査を行うことである。 In view of the above points, the present invention provides a function to constantly monitor the function of the sensor, test whether the sensor is working, and test whether the sensitivity of the sensor is within the normal range. The purpose is to provide inspection equipment. Another purpose is to perform a functional test of a sensor by remote control of a receiver or the like without having to go to the location where the sensor is installed.
本発明は、煙検出用発光素子を有する煙検出用
発光回路と、前記煙検出用発光素子からの光の煙
による散乱光を受光する煙検出用受光素子を有す
る受光回路と、前記受光回路の受光出力が火災判
別レベルを越えているか否かを判別する火災判別
手段と、前記受光回路の受光出力が正常レベル範
囲内にあるか否かを判別する機能判別手段と、前
記煙検出用受光素子が直接受光できるように配置
された検査用発光素子と、受信機等から試験信号
を受信した時に前記受光回路の受光出力が前記火
災判別レベルを越えるように、前記煙検出用発光
素子と同期して前記検査用発光素子を発光させる
検査用発光手段と、前記検査用発光手段の発光に
よる火災判別手段の出力により機能判別手段の判
別結果信号を受信機等に送出する信号送出手段と
を有することを特徴とする光電式煙感知器の機能
検査装置により、前記目的を達成しようとするも
のである。 The present invention provides a light-emitting circuit for smoke detection having a light-emitting element for smoke detection, a light-receiving circuit having a light-receiving element for smoke detection that receives light scattered by smoke from the light-emitting element for smoke detection, and a light-receiving circuit comprising the light-receiving circuit. fire discrimination means for determining whether the received light output exceeds a fire discrimination level; a function determination means for determining whether the received light output of the light receiving circuit is within a normal level range; and the smoke detection light receiving element. A light emitting element for inspection is arranged so that it can directly receive light, and a light emitting element for smoke detection is synchronized with the light emitting element for smoke detection so that the light receiving output of the light receiving circuit exceeds the fire discrimination level when a test signal is received from a receiver or the like. and a signal transmitting means for transmitting a discrimination result signal of the function discriminating means to a receiver or the like based on the output of the fire discriminating means based on the light emitted from the inspecting light emitting means. It is an object of the present invention to achieve the above object with a function testing device for a photoelectric smoke detector, which is characterized by the following.
以下、本発明の実施例を添付図面により説明す
る。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図において６は発光回路、１は煙検出用発
光素子で、該発光素子１は遮光板３により直接煙
検出用受光素子２に入らないようにする。煙検出
用受光素子２の受光出力は、電気信号に変換後、
受光増幅回路１２で増幅され、比較器１３〜１７
に入力する。１３は火災状態を検出する火災検出
比較器、１４は誤報を生じる誤報警戒状態を検出
する誤報警戒比較器、１５は誤報を生じやすくな
つている誤報注意状態を検出する誤報注意比較
器、１６は失報を生じやすくなつている失報注意
状態を検出する失報注意比較器、１７は失報を生
じる失報警戒状態を検出する失報警戒比較器で、
各々感知器の状態に応じた闘値が設定されてい
る。比較器１３，１５および１６は感知器の機能
が正常か否かを判別する機能判別回路２１に接続
し、該回路２１の判別出力は状態信号により保持
回路２２により保持される。この判別出力は、信
号発生回路２３を制御し、状態信号を発生させる
比較器１３，１４及び１７はゲート制御信号発生
回路１８に接続し、該回路１８の判別出力はゲー
ト制御信号保持回路１９により保持される。 In FIG. 1, 6 is a light emitting circuit, 1 is a light emitting element for smoke detection, and the light emitting element 1 is prevented from directly entering the light receiving element 2 for smoke detection by a light shielding plate 3. After converting the light receiving output of the smoke detection light receiving element 2 into an electrical signal,
The light is amplified by the light receiving amplifier circuit 12, and the comparators 13 to 17
Enter. 13 is a fire detection comparator that detects a fire state; 14 is a false alarm warning comparator that detects a false alarm warning state that causes a false alarm; 15 is a false alarm warning comparator that detects a false alarm warning state that is likely to cause false alarms; a misfire warning comparator for detecting a misfire warning state in which misfires are more likely to occur; 17 is a misfire warning comparator for detecting a misfire warning state that causes misfires;
A threshold value is set depending on the status of each sensor. The comparators 13, 15 and 16 are connected to a function determining circuit 21 which determines whether the function of the sensor is normal or not, and the determined output of the circuit 21 is held by a holding circuit 22 based on a status signal. This discrimination output controls the signal generation circuit 23, and the comparators 13, 14, and 17 that generate state signals are connected to the gate control signal generation circuit 18, and the discrimination output of the circuit 18 is transmitted to the gate control signal holding circuit 19. Retained.
２０は信号用ゲート回路で、この回路２０を開
くと感知器機能状態信号が、信号出力回路２４を
介して図示しない受信機に送出される。 20 is a signal gate circuit, and when this circuit 20 is opened, a sensor function status signal is sent to a receiver (not shown) via a signal output circuit 24.
５は煙検出用発光素子１の光を直接受光する監
視用受光素子で、この受光出力は、受光増幅回路
７で増幅された後、発光用ゲート回路８に入力す
る。このゲート回路８に検出−検査切替回路１１
及び発光量調節回路９が接続されており、該回路
９の出力が発光回路１０に入ると、監視用受光素
子５の受光出力に応じた光出力で検査用発光素子
４が発光する。 Reference numeral 5 denotes a monitoring light-receiving element that directly receives the light from the smoke detection light-emitting element 1. The light-receiving output is amplified by a light-receiving amplifier circuit 7 and then input to a light-emitting gate circuit 8. This gate circuit 8 has a detection-inspection switching circuit 11.
and a light emission amount adjustment circuit 9 are connected, and when the output of the circuit 9 enters the light emitting circuit 10, the inspection light emitting element 4 emits light with a light output corresponding to the light receiving output of the monitoring light receiving element 5.
検査用発光素子４と監視用受光素子５との間に
遮光板３を設け、発光素子４の光を直接受光しな
いようにする。 A light-shielding plate 3 is provided between the light-emitting element 4 for inspection and the light-receiving element 5 for monitoring, so that the light from the light-emitting element 4 is not directly received.
図示しない受信機から呼出信号が送出される
と、信号受信回路２５が受信し、受信信号判別回
路２６により呼出信号と判別され、受信機からの
復旧信号を受信するまで呼出信号保持回路２７に
信号を保持する。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実施例の作動を説明
する。 When a calling signal is sent from a receiver (not shown), the signal receiving circuit 25 receives it, the received signal determining circuit 26 determines that it is a calling signal, and the signal is held in the calling signal holding circuit 27 until a recovery signal is received from the receiver. hold. FIG. 2 is a circuit diagram of FIG. 1, and the operation of the embodiment will be explained below with reference to these drawings.
監視用受光素子５フオトトランジスタT6は、
煙検出用発光素子１LED1の光出力を受光し、か
つ、発光用ゲート回路８のトランジスタT8がON
している時、検査用発光素子４LED2に受光出力
に応じた電流を与え、検査用発光素子４LED2を
受光出力に応じて発光させる。 Monitoring light receiving element 5 phototransistor T6 is
The light output of the smoke detection light emitting element 1 LED 1 is received, and the transistor T 8 of the light emitting gate circuit 8 is turned on.
At this time, a current is applied to the test light emitting element 4LED 2 according to the received light output, and the test light emitting element 4LED2 emits light according to the received light output.
一方、発光用ゲート回路８のトランジスタT8
は、煙検出用発光素子１LED1の駆動用フロツク
を受けたＴ型フリツプフロツプIC16（検出−検査
切替回路１１）の出力によりON／OFF制御され
る。 On the other hand, the transistor T 8 of the light emitting gate circuit 8
is ON/OFF controlled by the output of the T-type flip-flop IC 16 (detection-inspection switching circuit 11) which receives the drive circuit of the smoke detection light emitting element 1 LED 1 .
このため、検査用発光素子４LED2は、第３図
のタイムチヤートに示す様に、煙検出用発光１
LED1の２倍の周期で発光する。 For this reason, the inspection light emitting element 4 LED 2 is connected to the smoke detection light emitting element 1 as shown in the time chart of Fig. 3.
Emit light at twice the cycle of LED 1 .
ここで、煙検出用発光素子１LED1と検査用発
光素子４LED2が共に発光している時を検査状態
（第３図１）とし、煙検出用発光素子１LED1のみ
が発光している時を煙検出状態（第３図２）とし
て、各々の場合における煙検出用受光素子２太陽
電池SB出力を反転増幅して得られる受光増幅回
路１２IC30出力を比較器１３〜１７IC35〜IC31及
びトランジスタT14〜T10でレベル判別し、感知
器状態を判別する。 Here, the inspection state is defined as the time when the smoke detection light emitting element 1 LED 1 and the inspection light emitting element 4 LED 2 are both emitting light (Fig. 3, 1), and the time when only the smoke detection light emitting element 1 LED 1 is emitting light is defined as the inspection state. As the smoke detection state (Fig. 3, 2), the output of the light receiving amplifier circuit 12 IC 30 obtained by inverting and amplifying the output of the light receiving element 2 for smoke detection solar cell SB in each case is transferred to the comparators 13 to 17 IC 35 to IC 31 and the transistor The level is determined at T 14 to T 10 and the sensor state is determined.
感知器機能の判別は、検査状態時の受光増幅回
路１２IC30出力が、失報注意比較器と誤報注意比
較器の闘値の間にある場合を正常とし、その他の
場合を異状とする。 The sensor function is determined when the output of the light receiving amplifier circuit 12IC 30 in the inspection state is between the threshold values of the missed alarm warning comparator and the false alarm warning comparator, and other cases are determined to be abnormal.
次に、感知器の監視時及び火災時における受信
機への信号伝達について述べる。 Next, we will discuss signal transmission to the receiver when monitoring the detector and in the event of a fire.
監視時において、受信機から感知器へ呼出信号
が伝達されると、信号受信回路２５により受信さ
れ、受信信号判別回路２６トランジスタT2によ
り呼出信号と判別され、トランジスタT1が受信
機から復旧信号を受信するまで呼出信号保持回路
２７IC20に保持される。 During monitoring, when a calling signal is transmitted from the receiver to the sensor, it is received by the signal receiving circuit 25, is determined to be a calling signal by the received signal discriminating circuit 26, transistor T2 , and transistor T1 receives the recovery signal from the receiver. is held in the calling signal holding circuit 27IC 20 until it is received.
呼出信号保持回路２７IC20主力は、機能判別回
路２１及び状態信号保持回路２２Ｄ型フリツプフ
ロツプIC12に呼出信号が受信されたことを知らし
め、呼出信号が受信される直前の感知器状態信号
を状態信号保持回路２２IC12に保持すると共に、
発光量調節回路９のトランジスタT7をOFFし、
検査状態時に、それまで抵抗RAに分流していた
電流を遮断することにより、検査用発光素子４
LED2の発光電流を増加させ、火災検出比較器１
３IC35を反転させて、信号用ゲート回路２０IC15
を開き、その時の感知器機能状態信号（信号発生
回路２３で発生する／2n、／2n-1、／2n-2
の信号）を信号出力回路２４トランジスタT4か
ら受信機へ送出する。 The main function of the calling signal holding circuit 27 IC 20 is to inform the function discrimination circuit 21 and the status signal holding circuit 22D type flip-flop IC 12 that a calling signal has been received, and to output the sensor status signal immediately before the receiving of the calling signal as a status signal. While holding in the holding circuit 22 IC 12 ,
Turn off the transistor T7 of the light emission amount adjustment circuit 9,
During the test state, by cutting off the current that had been shunted to the resistor RA, the test light emitting element 4
Increase the light emitting current of LED 2 , fire detection comparator 1
Invert 3IC 35 and create a signal gate circuit 20IC 15
Open the sensor function status signal at that time (/2 n , /2 n-1 , /2 n-2 generated by the signal generation circuit 23)
signal) from the signal output circuit 24 transistor T4 to the receiver.
この時、受信機へ送出される信号／2nならば
感知器機能は正常状態であり、／2n-1ならば異
状状態である。上記操作により光学系だけでな
く、信号送出に係る回路の機能検査を併せて行う
ことができる。 At this time, if the signal sent to the receiver is /2 n , the sensor function is in a normal state, and if /2 n-1 , it is in an abnormal state. By the above operation, it is possible to perform a functional test not only of the optical system but also of the circuit related to signal transmission.
受信機からの呼出信号がない場合でも、検査状
態時での煙検出用受光素子２SB出力が定常値よ
りも大巾に減少又は増加することにより、失報警
戒状態、又は誤報警戒状態となると、失報警戒比
較器１７IC31又は、誤報警戒比較器１４IC34が反
転し、ゲート制御信号発生回路１８IC27の信号が
出力され、ゲート制御信号保持回路１９IC14に保
持された後、信号用ゲート回路２０IC15を開き、
信号発生回路２３からの異状信号／2n-1を信号
出力回路２４から受信機へ送出する。 Even if there is no call signal from the receiver, if the output of the smoke detection light receiving element 2SB during the inspection state decreases or increases by a large amount than the steady value, a false alarm alarm state or a false alarm alarm state occurs. The false alarm warning comparator 17IC 31 or the false alarm warning comparator 14IC 34 is inverted, and the signal from the gate control signal generating circuit 18IC 27 is output, and after being held in the gate control signal holding circuit 19IC 14 , it is transferred to the signal gate circuit 20IC. Open 15 ,
The abnormal signal /2 n-1 from the signal generation circuit 23 is sent from the signal output circuit 24 to the receiver.
火災時において図示しない検煙室内に煙が侵入
すると、煙検出用発光素子１LED1の光は煙に当
たつて散乱し、煙検出状態での煙検出用受光素子
２SB出力が増加して、火災検出比較器１３IC35
が反転すると、受信機からの呼出信号の有無にか
かわらず信号用ゲート回路２０IC15を開き、火災
信号／2n-2を受信機へ送出する。 When smoke enters a smoke detection chamber (not shown) during a fire, the light from the smoke detection light emitting element 1 LED 1 hits the smoke and scatters, and the output of the smoke detection light receiving element 2SB increases in the smoke detection state, causing a fire. Detection comparator 13IC 35
When reversed, the signal gate circuit 20IC 15 is opened regardless of the presence or absence of a call signal from the receiver, and the fire signal /2 n-2 is sent to the receiver.
受信機は火災信号受信後、必要に応じて復旧信
号を感知器へ伝達し、感知器動作を復旧させる。
なお、第２図中、DBは感知器を無極性化するた
めのダイオードブリツジであり、ADは同一線路
中に多数の感知器が接続されている場合に、いず
れの感知器の信号かを識別するための変調用アド
レス信号発生回路で、感知器毎に周波数を異なら
せる。 After receiving the fire signal, the receiver transmits a recovery signal to the sensor as necessary to restore the sensor operation.
In Figure 2, DB is a diode bridge to make the sensor non-polarized, and AD is a diode bridge that makes the sensor non-polarized, and AD is used to identify which sensor the signal is from when many sensors are connected on the same line. A modulation address signal generation circuit for identification uses a different frequency for each sensor.
本発明は以上の様に構成したので、次の様な顕
著な効果を奏する。 Since the present invention is constructed as described above, it has the following remarkable effects.
１ 火災判別手段と機能判別手段とを備えている
ので、受光回路の受光出力が火災判別レベルを
越えているか否か（火災判別）の判別の他に該
受光出力が正常レベル範囲内にあるか否か（機
能判別）の判別をすることができる。1 Since it is equipped with a fire discrimination means and a function discrimination means, it is possible to determine whether the received light output of the light receiving circuit exceeds the fire discrimination level (fire discrimination) and whether the received light output is within the normal level range. It is possible to determine whether or not it is possible (function determination).
２ 検査用発光素子を発光させる検査用発光手段
と信号送出手段とを設けたので、受信機等から
試験信号を受信した時に検査用発光素子を発光
させると、前記受信回路の受光出力が火災レベ
ルを越え、火災判別手段から出力される。その
ため信号用ゲート回路が開き、機能判別手段の
判別結果信号が受信機等に送出される。従つて
受信機からの遠隔操作により感知器機能状態を
認識できる。又、この装置では煙を用いて煙濃
度を変えて行う感知器機能検査方法とほぼ同等
の検査結果を得られる。2. Since the test light emitting means for making the test light emitting element emit light and the signal sending means are provided, when the test light emitting element is made to emit light when a test signal is received from the receiver, etc., the light reception output of the receiving circuit reaches the fire level. is output from the fire discrimination means. Therefore, the signal gate circuit is opened and the determination result signal of the function determining means is sent to a receiver or the like. Therefore, the functional status of the sensor can be recognized by remote control from the receiver. Furthermore, with this device, it is possible to obtain almost the same test results as a sensor function test method that uses smoke and changes the smoke density.
第１図は本発明の実施例のブロツク図、第２図
は第１図の回路図、第３図は本発明の実施例のタ
イムチヤートである。
１……煙検出用発光素子、２……煙検出用受光
素子、４……検査用発光素子、５……監視用受光
素子。
FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of FIG. 1, and FIG. 3 is a time chart of an embodiment of the present invention. 1... Light emitting element for smoke detection, 2... Light receiving element for smoke detection, 4... Light emitting element for inspection, 5... Light receiving element for monitoring.
Claims (1)
と、前記煙検出用発光素子からの光の煙による散
乱光を受光する煙検出用受光素子を有する受光回
路と、前記受光回路の受光出力が火災判別レベル
を越えているか否かを判別する火災判別手段と、
前記受光回路の受光出力が正常レベル範囲内にあ
るか否かを判別する機能判別手段と、前記煙検出
用受光素子が直接受光できるように配置された検
査用発光素子と、受信機等から試験信号を受信し
た時に前記受光回路の受光出力が前記火災判別レ
ベルを越えるように、前記煙検出用発光素子と同
期して前記検査用発光素子を発光させる検査用発
光手段と、前記検査用発光手段の発光による火災
判別手段の出力により機能判別手段の判別結果信
号を受信機等に送出する信号送出手段とを有する
ことを特徴とする光電式煙感知器の機能検査装
置。1. A light-emitting circuit for smoke detection having a light-emitting element for smoke detection, a light-receiving circuit having a light-receiving element for smoke detection that receives light scattered by smoke from the light-emitting element for smoke detection, and a light-receiving output of the light-receiving circuit. a fire discrimination means for determining whether or not the fire discrimination level is exceeded;
A function determining means for determining whether the light receiving output of the light receiving circuit is within a normal level range, a test light emitting element arranged so that the light receiving element for smoke detection can directly receive light, and a test device from a receiver or the like. a test light emitting means for causing the test light emitting element to emit light in synchronization with the smoke detection light emitting element so that the light receiving output of the light receiving circuit exceeds the fire discrimination level when a signal is received; and the test light emitting means 1. A function testing device for a photoelectric smoke detector, comprising signal sending means for sending a determination result signal of the function determining means to a receiver or the like based on the output of the fire determining means based on light emission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19998689A JPH0285994A (en) | 1989-08-01 | 1989-08-01 | Function inspecting device for photoelectric smoke sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19998689A JPH0285994A (en) | 1989-08-01 | 1989-08-01 | Function inspecting device for photoelectric smoke sensor |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58061023A Division JPS59187246A (en) | 1983-04-08 | 1983-04-08 | Inspecting apparatus of function of photoelectric smoke sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0285994A JPH0285994A (en) | 1990-03-27 |
| JPH0546000B2 true JPH0546000B2 (en) | 1993-07-12 |
Family
ID=16416889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19998689A Granted JPH0285994A (en) | 1989-08-01 | 1989-08-01 | Function inspecting device for photoelectric smoke sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0285994A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52131499A (en) * | 1976-04-27 | 1977-11-04 | Matsushita Electric Works Ltd | Equipment abnormality detection system for photo-electric smoke sensor |
| JPS533880A (en) * | 1976-07-01 | 1978-01-13 | Matsushita Electric Works Ltd | Sensitivity checking method for scattered light type smoke detector |
| JPS53105197A (en) * | 1977-02-24 | 1978-09-13 | Matsushita Electric Works Ltd | Signal processing circuit for fire senfor |
| JPS5436712U (en) * | 1977-08-19 | 1979-03-10 | ||
| JPS562537A (en) * | 1979-06-20 | 1981-01-12 | Matsushita Electric Ind Co Ltd | Smoke detector |
| JPS5619439A (en) * | 1979-07-26 | 1981-02-24 | Matsushita Electric Ind Co Ltd | Photoelectric smoke detector |
| JPH0244385A (en) * | 1988-08-05 | 1990-02-14 | Toshiba Corp | Temperature controller |
| JPH02153498A (en) * | 1989-08-01 | 1990-06-13 | Nohmi Bosai Ltd | Function inspection device for photoelectric smoke sensor |
-
1989
- 1989-08-01 JP JP19998689A patent/JPH0285994A/en active Granted
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52131499A (en) * | 1976-04-27 | 1977-11-04 | Matsushita Electric Works Ltd | Equipment abnormality detection system for photo-electric smoke sensor |
| JPS533880A (en) * | 1976-07-01 | 1978-01-13 | Matsushita Electric Works Ltd | Sensitivity checking method for scattered light type smoke detector |
| JPS53105197A (en) * | 1977-02-24 | 1978-09-13 | Matsushita Electric Works Ltd | Signal processing circuit for fire senfor |
| JPS5436712U (en) * | 1977-08-19 | 1979-03-10 | ||
| JPS562537A (en) * | 1979-06-20 | 1981-01-12 | Matsushita Electric Ind Co Ltd | Smoke detector |
| JPS5619439A (en) * | 1979-07-26 | 1981-02-24 | Matsushita Electric Ind Co Ltd | Photoelectric smoke detector |
| JPH0244385A (en) * | 1988-08-05 | 1990-02-14 | Toshiba Corp | Temperature controller |
| JPH02153498A (en) * | 1989-08-01 | 1990-06-13 | Nohmi Bosai Ltd | Function inspection device for photoelectric smoke sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0285994A (en) | 1990-03-27 |
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