JPH03250395A - Scattered light type smoke sensor - Google Patents
Scattered light type smoke sensorInfo
- Publication number
- JPH03250395A JPH03250395A JP4842690A JP4842690A JPH03250395A JP H03250395 A JPH03250395 A JP H03250395A JP 4842690 A JP4842690 A JP 4842690A JP 4842690 A JP4842690 A JP 4842690A JP H03250395 A JPH03250395 A JP H03250395A
- Authority
- JP
- Japan
- Prior art keywords
- output
- light
- analog
- sensor
- light receiving
- 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 abstract description 57
- 238000001514 detection method Methods 0.000 claims description 54
- 230000005540 biological transmission Effects 0.000 claims description 26
- 230000010355 oscillation Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 210000004899 c-terminal region Anatomy 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、煙による散乱光を受光して火災を判断する散
乱光式煙感知器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a scattered light type smoke detector that detects fire by receiving scattered light from smoke.
［従来の技術］
従来、この種の散乱光式煙感知器にあっては、発光素子
からの光が直接受光素子に入射しないように感知器内の
検煙領域に対し発光素子と受光素子を配置し、検煙領域
に流入した煙による散乱光を受光素子で受光して電気信
号に変換し、この受光レベルから火災を判断している。[Prior Art] Conventionally, in this type of scattered light type smoke detector, a light emitting element and a light receiving element are placed in the smoke detection area within the sensor so that the light from the light emitting element does not directly enter the light receiving element. A light receiving element receives scattered light from smoke flowing into the smoke detection area, converts it into an electrical signal, and determines whether there is a fire based on the level of the received light.
従来の散乱光式煙感知器においては、受光レベルが予め
設定した閾値レベルを越えた時に火災と判断し、出力回
路のＳＣＲ等をトリガし、火災報知装置からの伝送線路
間を低インピーダンスに短絡して発報電流を流すことに
より火災検出信号を火災報知装置へ送出している。この
ように火災検出時に出力回路をオンして火災検出信号を
送出することから所謂オンオフ型火災感知器として知ら
れている。Conventional scattered light smoke detectors determine that there is a fire when the received light level exceeds a preset threshold level, trigger the SCR of the output circuit, and short-circuit the transmission line from the fire alarm device to a low impedance. A fire detection signal is sent to the fire alarm system by applying an alarm current. In this way, when a fire is detected, the output circuit is turned on to send out a fire detection signal, so it is known as a so-called on-off type fire detector.
一方、近年にあっては、感知器で検出した受光レベルそ
のものを火災報知装置に伝送し、火災報知装置側で火災
を判断する所謂アナログ感知器としての機能が散乱光式
煙感知器についても実用化されている。On the other hand, in recent years, the function of a so-called analog sensor, in which the level of light received by the sensor itself is transmitted to the fire alarm system, and the fire alarm system determines whether there is a fire, has been put into practical use for scattered light smoke detectors. has been made into
このアナログ型の散乱光式感知器にあっては、従来のオ
ンオフ型の感知器回路における、散乱光検出構造、発光
回路、受光回路と同じものを使用し、オンオフ出力回路
の代わりに火災報知装置（受信機）からのポーリングに
対しアナログ検出情報を伝送する伝送制御機能を備えた
アナログ専用の出力回路を設けている。This analog type scattered light sensor uses the same scattered light detection structure, light emitting circuit, and light receiving circuit as in the conventional on/off type sensor circuit, and instead of the on/off output circuit, it is used as a fire alarm device. An analog-dedicated output circuit is provided with a transmission control function that transmits analog detection information in response to polling from the receiver.
［発明が解決しようとする課題］
しかしながら、このような従来のアナログ型の散乱光式
煙感知器にあっては、ポーリング伝送制御回路、受光出
力のサンプルホールド回路、検出情報を電流モードで伝
送する電流出力回路等を必要とするため、単にＳＣＲの
トリガ等で火災検出信号を送出していたオンオフ型に比
べ感知器回路の規模が大きくなる。[Problems to be Solved by the Invention] However, in such conventional analog scattered light type smoke detectors, a polling transmission control circuit, a sample and hold circuit for the received light output, and a detection information are transmitted in current mode. Since a current output circuit and the like are required, the scale of the sensor circuit becomes larger than that of the on-off type, which simply sends out a fire detection signal using an SCR trigger or the like.
一方、近年にあっては、小形化されたオンオフ型の散乱
光式煙感知器が実用化されており、小形化に伴い感知器
回路を実装するプリント基板も小形化されている。On the other hand, in recent years, miniaturized on-off type scattered light type smoke detectors have been put into practical use, and along with the miniaturization, the printed circuit boards on which the sensor circuits are mounted have also been miniaturized.
そこで小形化されたオンオフ型感知器の回路基板をアナ
ログ型の回路基板に代えれば、簡単にアナログ型につい
ても同様な小形化を図ることができる。Therefore, by replacing the circuit board of the miniaturized on-off type sensor with an analog type circuit board, it is possible to easily achieve a similar miniaturization of the analog type sensor.
しかし、アナログ型はオンオフ型に比べて回路規模が約
２倍弱となるため回路基板の径が大きくなり、小形化さ
れたオンオフ型感知器の回路収納部に納めることができ
ない。そのため回路収納部を大きくしたアナログ専用の
感知器構造が必要であり、また出力回路部以外は共通の
構成であっても別々に作らなければならず、生産効率も
低いという問題があった。However, since the circuit scale of the analog type is about twice as large as that of the on-off type, the diameter of the circuit board becomes large, and it cannot be accommodated in the circuit housing of the miniaturized on-off type sensor. Therefore, an analog-specific sensor structure with a large circuit housing section is required, and even if the components other than the output circuit section have a common configuration, they must be manufactured separately, resulting in a problem of low production efficiency.
本発明は、このような従来の問題点に鑑みてなされたも
ので、まず本発明の目的は、２つの異なる火災判断の出
力機能をもつ感知器を選択的に実現できる散乱光式煙感
知器を提供する。The present invention has been made in view of these conventional problems. First, an object of the present invention is to provide a scattered light type smoke detector that can selectively realize a detector having two different fire detection output functions. I will provide a.
本発明の他の目的は、オンオフ感知器回路部にアナログ
感知器の出力回路部を付加するだけで簡単にアナログ型
感知器を構成できる散乱光式煙感知器を提供する。Another object of the present invention is to provide a scattered light type smoke sensor which can be easily configured as an analog type sensor by simply adding an output circuit section of an analog sensor to an on/off sensor circuit section.
本発明の他の目的は、オンオフ感知器回路部を独立した
プリント基板に実装し、このプリント基板にアナログ感
知器の出力回路部を実装した他のプリント基板をコネク
タ接続により重ねることで小形化された感知器筐体の回
路収納部に組込み可能な散乱光式煙感知器を提供する。Another object of the present invention is to mount an on/off sensor circuit section on an independent printed circuit board, and to stack another printed circuit board on which an output circuit section of an analog sensor is mounted on this printed circuit board by connecting a connector, thereby reducing the size of the circuit. To provide a scattered light type smoke detector that can be incorporated into a circuit housing part of a sensor housing.
［課題を解決するための手段］ この目的を達成するため本発明は次のように構成する。[Means to solve the problem] In order to achieve this object, the present invention is constructed as follows.
尚、実施例図面中の番号を併せて示す。In addition, the numbers in the drawings of the embodiments are also shown.
まず本発明は、火災報知装置（受信機）に伝送路１０を
介して接続された散乱光式煙感知器を対象とする。First, the present invention is directed to a scattered light type smoke detector connected to a fire alarm device (receiver) via a transmission line 10.
このような散乱光式煙感知器につき本発明にあっては、
検煙領域１２に向けて光を出力する発光手段１４と、検
煙領域１２に侵入した煙による発光手段１４からの光の
散乱光を受光し、電気信号に変換して出力する受光手段
１６と、受光手段１６の受光出力が所定の閾値レベルを
越えた時に伝送線路１２を介して火災警報装置に火災検
出信号を出力する第１出力手段１８と、受光手段１６の
受光出力から第１出力手段１８とは異なる火災判断のた
めの火災検出情報を求め、該火災検出情報を伝送線路１
２を介して火災報知装置に伝送する着脱自在な第２出力
手段２０と、第２出力手段２０の装着時に第１出力手段
１８に接続している受光手段１６の受光出力を切離して
第２出力手段２０に接続する切替手段２２とを設けたこ
とを特徴とする。In the present invention, for such a scattered light type smoke detector,
A light emitting means 14 that outputs light toward the smoke detection area 12; and a light receiving means 16 that receives scattered light from the light emitting means 14 due to smoke that has entered the smoke detection area 12, converts it into an electrical signal, and outputs it. , a first output means 18 that outputs a fire detection signal to the fire alarm device via the transmission line 12 when the light reception output of the light reception means 16 exceeds a predetermined threshold level, and a first output means from the light reception output of the light reception means 16. 18, and transmits the fire detection information to the transmission line 1.
A detachable second output means 20 transmits data to the fire alarm device via the second output means 20, and when the second output means 20 is installed, the light receiving output of the light receiving means 16 connected to the first output means 18 is separated and a second output is generated. The present invention is characterized in that a switching means 22 connected to the means 20 is provided.
具体的には、発光手段１４、受光手段１６、第１出力手
段１８及び切替手段２２によりオンオフ感知器回路部２
４を構成し、第２出力手段２０により切替手段２２を介
して得られた受光手段１４の受光手段をサンプリングし
てアナログ火災検出情報として出力するアナログ感知器
回路部２６を構成する。Specifically, the on/off sensor circuit section 2 is controlled by the light emitting means 14, the light receiving means 16, the first output means 18, and the switching means 22.
4 constitutes an analog sensor circuit section 26 which samples the light receiving means of the light receiving means 14 obtained by the second output means 20 via the switching means 22 and outputs it as analog fire detection information.
更にオンオフ感知器回路部２４を第１プリント基板に実
装し、またアナログ感知器回路部２６を第２プリント基
板に実装し、第１プリント基板と第２プリント基板を感
知器の高さ方向に重ねてプリント基板間をコネクタによ
り電気的に接続する共に機械的に支持固定したことを特
徴とする。Furthermore, the on/off sensor circuit section 24 is mounted on the first printed circuit board, and the analog sensor circuit section 26 is mounted on the second printed circuit board, and the first printed circuit board and the second printed circuit board are stacked in the height direction of the sensor. The printed circuit board is electrically connected by a connector and is mechanically supported and fixed.
［作用］
このような構成を備えた本発明の散乱光式煙感知器によ
れば、発光手段、受光手段及び第１出力手段、更に切替
手段を備えた回路部、例えばオンオフ感知器回路部に対
し、第２出力手段、例えばアナログ感知器回路部を別途
着脱自在に準備して付加するだけでアナログ型の散乱光
式煙感知器を簡単に実現できる。[Function] According to the scattered light type smoke detector of the present invention having such a configuration, a circuit section including a light emitting means, a light receiving means, a first output means, and a switching means, for example, an on/off sensor circuit section. On the other hand, an analog type scattered light type smoke detector can be easily realized by simply preparing and adding a second output means, for example, an analog sensor circuit section in a detachable manner.
このとき散乱式の煙検出機構はオンオフ型のものをその
まま使用しており、この共通化により生産効率を大幅に
向上できる。At this time, the on-off type scattering smoke detection mechanism is used as is, and this commonality can greatly improve production efficiency.
またオンオフ型感知器回路部のプリント基板にアナログ
感知器回路部のプリント基板をコネクタ接続により積み
重ね配置して電気的に接続すると同時に機械的に支持固
定することで、小形化されたオンオフ感知器の回路収納
部の径を変更する゛ことなく、高さ方向の寸法変更のみ
で収納でき、オンオフ型とアナログ型の感知器筐体その
ものの共通化も容易に実現できる。In addition, the printed circuit board of the analog sensor circuit section is stacked on the printed circuit board of the on-off type sensor circuit section by connector connection, and the printed circuit board of the analog sensor circuit section is stacked on top of the printed circuit board of the on-off type sensor circuit section, electrically connected, and mechanically supported and fixed at the same time. It can be stored simply by changing the dimensions in the height direction without changing the diameter of the circuit housing section, and it is also easy to standardize the sensor housing itself for the on-off type and analog type.
［実施例］
第１図は本発明の基本的な実施例を示した実施例構成図
である。[Embodiment] FIG. 1 is a block diagram of an embodiment showing a basic embodiment of the present invention.
第１図において、本発明の散乱光式煙感知器は伝送路１
０を介して不図示の火災報知装置に接続される。In FIG. 1, the scattered light type smoke detector of the present invention has a transmission path 1.
0 to a fire alarm device (not shown).
本発明の散乱光式煙感知器はオンオフ感知器回路部２４
とアナログ感知器回路部２６の２つに分けられる。オン
オフ感知器回路部２４には発光素子３０の駆動により検
煙領域１２に向けて光を出力する発光手段１４と、検煙
領域１２に侵入した煙による発光手段１４からの光の散
乱光を受光し、電気信号に変換して出力する受光手段１
６と、受光手段１６の受光出力が所定の閾値レベルを越
えたときに伝送路１０を介して火災報知装置に火災検出
信号を出力する第１出力手段（オンオフ出力手段）が設
けられる。The scattered light type smoke detector of the present invention has an on-off sensor circuit section 24.
and an analog sensor circuit section 26. The on-off sensor circuit section 24 includes a light emitting means 14 that outputs light toward the smoke detection area 12 by driving a light emitting element 30, and receives scattered light from the light emitting means 14 due to smoke that has entered the smoke detection area 12. A light receiving means 1 that converts the signal into an electrical signal and outputs it.
6, and a first output means (on/off output means) for outputting a fire detection signal to the fire alarm device via the transmission line 10 when the light receiving output of the light receiving means 16 exceeds a predetermined threshold level.
一方、アナログ感知器回路部２６には受光手段１６の受
光出力をサンプリングしてアナログ火災検出情報として
伝送路１０を介して火災報知装置に出力する第２出力手
段２０が設けられる。尚、第２出力手段２０としては、
第１出力手段１８におけるオンオフ型の火災判断とは異
なる他の火災判断のための火災検出情報を検出して出力
する手段であれば、この実施例で一例として挙げている
アナログ感知器としての出力手段に限定されない。On the other hand, the analog sensor circuit section 26 is provided with a second output means 20 for sampling the light receiving output of the light receiving means 16 and outputting it as analog fire detection information to the fire alarm device via the transmission line 10. In addition, as the second output means 20,
If it is a means for detecting and outputting fire detection information for fire determination other than the on-off type fire determination in the first output means 18, output as an analog sensor, which is cited as an example in this embodiment. Not limited to means.
例えば第２出力手段２０としては火災判断の閾値レベル
を複数段階に設定し、火災検出レベルが各段階を上回る
毎に火災検出出力を送出する多段階オンオフ出力手段も
含まれる。For example, the second output means 20 may include multi-stage on/off output means that sets the threshold level for fire judgment in multiple stages and sends out a fire detection output each time the fire detection level exceeds each stage.
また、アナログ感知器回路部２６に設けられた第２出力
手段２０には、通常、アナログ検出情報の送出が火災報
知装置からのポーリングに応答して行なわれることから
、ポーリング伝送の制御機能が設けられる。Further, the second output means 20 provided in the analog sensor circuit section 26 is provided with a control function for polling transmission, since analog detection information is normally transmitted in response to polling from a fire alarm device. It will be done.
更に、第２出力手段２０を加えたアナログ感知器回路部
２６の設置に伴い、オンオフ感知器回路部２４側に切替
手段２２が設けられる。切替手段２２は受光手段１６の
受光出力を第１出力手段１８または第２出力手段２０に
選択的に切替出力するもので、アナログ感知器回路部２
６が付加されていない状態では図示のように切替手段２
２はａ側に切り替わって、受光手段１６の受光出力を第
１出力手段１８に切替接続している。この状態でオンオ
フ感知器回路部２４に対しコネクタ２８を介してアナロ
グ感知器回路部２６を接続すると、切替手段２２の切替
制御ライン３４がコネクタ２８を介して例えばアナログ
感知器回路部２６で接地接続され、この接地接続による
切替制御を受けて切替手段２２はｂ側に切り替わり、受
光手段１６の受光出力を第１出力手段１８から切り離し
て第２出力手段２０側に切替接続するようになる。Further, with the installation of the analog sensor circuit section 26 including the second output means 20, a switching means 22 is provided on the on/off sensor circuit section 24 side. The switching means 22 selectively switches and outputs the light reception output of the light receiving means 16 to the first output means 18 or the second output means 20.
6 is not added, as shown in the figure, the switching means 2
2 is switched to the a side, and the light receiving output of the light receiving means 16 is switched and connected to the first output means 18. In this state, when the analog sensor circuit section 26 is connected to the on/off sensor circuit section 24 via the connector 28, the switching control line 34 of the switching means 22 is connected to ground via the connector 28, for example, at the analog sensor circuit section 26. Under switching control by this ground connection, the switching means 22 is switched to the b side, and the light reception output of the light receiving means 16 is separated from the first output means 18 and switched to the second output means 20 side.
更に、オンオフ感知器回路部２４とアナログ感知器回路
部２６がそれぞれ別のプリント基板に実装されており、
後の説明で明らかにするように、２枚のプリント基板を
コネクタ２８を間に介して重ね合わせることで電気的な
接続と同時に機械的な支持固定が実現できるようにして
いる。Further, the on/off sensor circuit section 24 and the analog sensor circuit section 26 are each mounted on separate printed circuit boards,
As will be explained later, by overlapping two printed circuit boards with the connector 28 in between, electrical connection and mechanical support and fixation can be achieved at the same time.
次に、第１図の実施例の作用を説明すると、まずオンオ
フ感知器回路部２４とアナログ感知器回路部２６は別々
のプリント基板上に独立した回路ユニットとして実装さ
れる。もし、オンオフ型の散乱光式煙感知器とした場合
には、オンオフ感知器回路部２４を実装したプリント基
板のみを感知器筐体の回路収納部に組み込めばよい。Next, to explain the operation of the embodiment shown in FIG. 1, first, the on/off sensor circuit section 24 and the analog sensor circuit section 26 are mounted as independent circuit units on separate printed circuit boards. If an on-off type scattered light type smoke sensor is used, only the printed circuit board on which the on-off sensor circuit section 24 is mounted may be incorporated into the circuit storage section of the sensor housing.
一方、アナログ型散乱光式煙感知器とした場合には、オ
ンオフ感知器回路部２４上にコネクタ２８を介してアナ
ログ感知器回路部２６のプリント基板を重ね合わせるよ
うに積層して感知器の回路収納部に組み込めばよい。こ
のアナログ感知器回路部２６のコネクタ２８による接続
状態で、伝送路１０に対する感知器接続により電源供給
を受けると、切替手段２２はコネクタ２８を介した切替
制御線３４のアナログ感知器回路部２６側への接地接続
でｂ側に切り替わり、受光手段１６の受光出力を必ず第
２出力手段２０に供給するようになり、アナログ型の散
乱光式煙感知器としての回路機能が実現される。On the other hand, in the case of an analog type scattered light type smoke detector, the printed circuit board of the analog sensor circuit section 26 is stacked on top of the on/off sensor circuit section 24 via the connector 28, and the sensor circuit It can be incorporated into the storage section. When the analog sensor circuit section 26 is connected to the connector 28 and power is supplied by the sensor connection to the transmission line 10, the switching means 22 is connected to the analog sensor circuit section 26 side of the switching control line 34 via the connector 28. When connected to the ground, it switches to the b side, and the light receiving output of the light receiving means 16 is always supplied to the second output means 20, realizing a circuit function as an analog type scattered light type smoke detector.
第２図は本発明の散乱光式煙感知器の具体的実施例を示
した実施例構成図である。FIG. 2 is a block diagram showing a specific embodiment of the scattered light type smoke detector of the present invention.
第２図において、第１図の基本構成き同様、感知器回路
はオンオフ感知器回路部２４とアナログ感知器回路部２
６に分けられ、両者はコネクタ２８により接続されてい
る。In FIG. 2, similar to the basic configuration in FIG. 1, the sensor circuit includes an on-off sensor circuit section 24 and an analog sensor circuit section 2.
6, and both are connected by a connector 28.
オンオフ感知器回路部２４側は回線接続部３６、第１出
力手段１８、切替手段２２、発光手段１４及び受光手段
１６で構成される。The on/off sensor circuit section 24 side is composed of a line connection section 36, a first output means 18, a switching means 22, a light emitting means 14, and a light receiving means 16.
回線接続部３６にはダイオードブリッジ３８が設けられ
、一対の信号線でなる伝送路１０に対しり、 Ｃ端子
により接続し、Ｌ、 Ｃ端子に対する伝送路１０の接
続極性を無極性化している。A diode bridge 38 is provided in the line connection section 36, and is connected to the transmission line 10 consisting of a pair of signal lines through a C terminal, and the connection polarity of the transmission line 10 to the L and C terminals is made non-polar.
発光手段１４には発振回路４０が設けられ、発振回路４
０はアナログ感知器回路部２６を接続していない状態で
は、一定周期毎に発光駆動パルスを発振出力している。The light emitting means 14 is provided with an oscillation circuit 40, and the oscillation circuit 4
0, when the analog sensor circuit section 26 is not connected, a light emission driving pulse is oscillated and outputted at regular intervals.
アナログ感知器回路部２６が接続された場合には、発振
回路４０の自励発振は停止し、アナログ感知器回路部２
６側からの制御信号を受ける毎に発光パルスを１つ出力
する。When the analog sensor circuit section 26 is connected, the self-oscillation of the oscillation circuit 40 is stopped, and the analog sensor circuit section 2
Each time it receives a control signal from the 6 side, it outputs one light emission pulse.
発振回路４０の出力は抵抗Ｒ１を介して発光ダイオード
を使用した発光素子３０に与えられ、検煙領域に対しパ
ルス光を発射する。尚、発振回路４０のパルス出力時の
電源供給は抵抗Ｒ２を介してコンデンサＣ２にチャージ
した電荷により行ない、これにより消費電流の低減を図
っている。The output of the oscillation circuit 40 is applied via a resistor R1 to a light emitting element 30 using a light emitting diode, which emits pulsed light to the smoke detection area. Incidentally, the power supply during the pulse output of the oscillation circuit 40 is performed by the electric charge charged in the capacitor C2 via the resistor R2, thereby reducing the current consumption.
受光手段１６には受光増幅器４２が設けられ、受光増幅
器４２には検煙領域からの煙による散乱光を受光して電
気信号に変換する受光素子３２を入力接続している。受
光増幅器４２に対する電源電圧は抵抗Ｒ３及びコンデン
サＣ２により安定化されている。The light receiving means 16 is provided with a light receiving amplifier 42, and a light receiving element 32 which receives light scattered by smoke from the smoke detection area and converts it into an electrical signal is connected to the light receiving amplifier 42 as an input. The power supply voltage for the light receiving amplifier 42 is stabilized by a resistor R3 and a capacitor C2.
受光手段１６の受光増幅器４２で得られた受光信号は切
替手段２２に与えられる。切替手段２２には２つのアナ
ログスイッチ４．４．４６が設けられる。アナログスイ
ッチ４４は抵抗Ｒ４を介した電源電圧の供給で制御され
、またアナログスイッチ４６は抵抗Ｒ４を介した電源電
圧をインバータ４８で反転した信号により制御される。The light receiving signal obtained by the light receiving amplifier 42 of the light receiving means 16 is given to the switching means 22. The switching means 22 is provided with two analog switches 4.4.46. The analog switch 44 is controlled by supplying a power supply voltage through a resistor R4, and the analog switch 46 is controlled by a signal obtained by inverting the power supply voltage through a resistor R4 by an inverter 48.
即ち、アナログスイッチ４４．４６は制御入力がＨレベ
ルでオン、Ｌレベルでオフとなる。アナログ感知器回路
部２６を接続していない場合、アナログスイッチ４４の
制御入力はＨレベルであることからオン、アナログスイ
ッチ４６の制御入力はインバータ４８で反転されてＬレ
ベルにあることからオフとなっており、従って受光増幅
器４６の受光出力をオン状態にあるアナログスイッチ４
４を介して第１出力手段１８に供給する。アナログ感知
器回路部２６を接続すると、コネクタ２８を介して抵抗
Ｒ４の下側が接地接続され、このためアナログスイッチ
４４の制御入力がＬレベルとなってオフし、アナログス
イッチ４６の制御入力かインバータ４８による反転でＨ
レベルとなってオンし、その結果、受光増幅器４２の受
光出力をオン状態にあるアナログスイッチ４６を介して
アナログ感知器回路部２６側に供給するようになる。That is, the analog switches 44 and 46 are turned on when the control input is at H level, and turned off when the control input is at L level. When the analog sensor circuit section 26 is not connected, the control input of the analog switch 44 is at H level, so it is on, and the control input of the analog switch 46 is inverted by the inverter 48 and is at L level, so it is off. Therefore, the light receiving output of the light receiving amplifier 46 is turned on when the analog switch 4 is turned on.
4 to the first output means 18. When the analog sensor circuit section 26 is connected, the lower side of the resistor R4 is connected to ground through the connector 28, so that the control input of the analog switch 44 becomes L level and turns off, and the control input of the analog switch 46 or the inverter 48 H by inversion by
As a result, the light receiving output of the light receiving amplifier 42 is supplied to the analog sensor circuit section 26 via the analog switch 46 which is in the on state.
第１出力手段１８にはオンオフ判定回路５０が設けられ
る。このオンオフ判定回路５０は所定の閾値を基準値と
して設定した比較器と、比較器による火災検出出力が２
回連続して得られたときに火災判定出力を生ずるカウン
タを備える。オンオフ判定回路５０による火災検出出力
はサイリスタ５２のゲートに与えられ、サイリスタ５２
のトリガによる導通で回線接続部３６を介して伝送路１
０間を低インピーダンスに短絡し、火災報知装置側に発
報電流を流すようになる。The first output means 18 is provided with an on/off determination circuit 50. This on/off determination circuit 50 includes a comparator that has a predetermined threshold value as a reference value, and a fire detection output from the comparator that is
It is equipped with a counter that produces a fire judgment output when the number of consecutive times is obtained. The fire detection output from the on/off determination circuit 50 is given to the gate of the thyristor 52.
The transmission line 1 is connected via the line connection part 36 by the trigger of
0 is short-circuited to a low impedance, and the alarm current is passed to the fire alarm device side.
次に、アナログ感知器回路部２６を説明する。Next, the analog sensor circuit section 26 will be explained.
アナログ感知器回路部２６は右側より伝送制御部５６、
サンプルホールド部５８、クロック検出部６０及びアナ
ログ出力部６２を備える。また、アナログ感知器回路部
２６はコネクタ２８を介してオンオフ感知器回路部２４
における回線接続部３６、即ちダイオードブリッジ３８
の２次側を分岐接続により引き込んでいる。The analog sensor circuit section 26 includes, from the right side, a transmission control section 56,
It includes a sample hold section 58, a clock detection section 60, and an analog output section 62. Further, the analog sensor circuit section 26 is connected to the on/off sensor circuit section 24 via a connector 28.
The line connection 36, i.e. the diode bridge 38, in
The secondary side of the is connected by a branch connection.
まず、クロック検出部６０を説明すると、クロック検出
部６０にはクロック検出回路６４か設けられる。クロッ
ク検出回路６４は伝送路１０に対し火災報知装置より送
出するポーリング用の呼出クロックを検出して、伝送制
御部５６の制御回路６６に供給する。First, explaining the clock detection section 60, the clock detection section 60 is provided with a clock detection circuit 64. The clock detection circuit 64 detects a polling clock sent from the fire alarm device to the transmission line 10 and supplies it to the control circuit 66 of the transmission control section 56 .
伝送制御部５６の制御回路６６にはアドレス設定回路６
８が設けられ、制御回路６６でクロック検出回路６４か
らの呼出クロックの計数値とアドレス設定回路６８の設
定値とを照合し、両者が一致すると自己の呼出しと判別
して次の呼出クロックが得られるまでの間の所定のタイ
ミングでアナログ検出情報の出力制御を行なう。The control circuit 66 of the transmission control section 56 includes an address setting circuit 6.
8 is provided, and the control circuit 66 compares the count value of the calling clock from the clock detection circuit 64 and the setting value of the address setting circuit 68, and if the two match, it is determined that the calling clock is its own and the next calling clock is obtained. The output of the analog detection information is controlled at a predetermined timing until the output of the analog detection information is detected.
具体的には、第３図のタイミングチャートに示すように
、火災報知装置からは伝送路１０を介して各感知器に対
し、リセットパルスに続いて一定周期毎に呼出クロック
を例えばｎ個出力する処理を繰り返している。このリセ
ットパルスに続く呼出クロックは、順番にアドレス１．
アドレス２゜アドレス３．・・・アドレスｎを表してい
る。従って、感知器側の伝送制御部５６に設けた制御回
路６６で、リセットパルスでカウンタをクリアしその後
に得られる呼出しクロックを計数することでアドレスを
検出でき、自己の設定アドレスと一致したときに自己の
呼出しと判別する。Specifically, as shown in the timing chart of FIG. 3, the fire alarm device outputs, for example, n call clocks at regular intervals following a reset pulse to each sensor via the transmission line 10. The process is repeated. The ringing clocks following this reset pulse sequentially address addresses 1 .
Address 2゜Address 3. ...Represents address n. Therefore, the control circuit 66 provided in the transmission control section 56 on the sensor side can detect the address by clearing the counter with a reset pulse and counting the call clocks obtained after that, and when it matches the self-set address, It is determined that the call is its own.
更に第３図はアドレス２を設定した感知器での応答制御
のタイミングを示している。即ち、アドレス２を設定し
た感知器にあっては、次のアドレス３となる呼出クロッ
クまでの間に、例えばステート１〜９を設けており、ス
テート６のタイミングでそのとき検出しているアナログ
検出信号の出力制御を行ない、次のステート７で感知器
動作が正常に行なわれていることを示す正常出力の制御
を行ない、更に次のステート８のタイミングで感知器の
種別を示す種別８カの制御を行なうようになる。Further, FIG. 3 shows the timing of response control in the sensor set to address 2. That is, in a sensor set to address 2, for example, states 1 to 9 are provided until the next call clock for address 3, and at the timing of state 6, the analog detection detected at that time is The output of the signal is controlled, and in the next state 7, the normal output is controlled, which indicates that the sensor is operating normally. Furthermore, in the next state 8, 8 types indicating the type of sensor are output. Becomes in control.
再び第２図を参照するに、伝送制御部５６にはリセット
回路７０が設けられる。リセット回路７０は電源投入直
後における制御回路６６の誤動作を防止するため、電源
投入から一定時間を経過するまでは制御回路６６をリセ
ット状態に維持する所謂パワーオンリセットを行なう。Referring again to FIG. 2, the transmission control section 56 is provided with a reset circuit 70. In order to prevent the control circuit 66 from malfunctioning immediately after the power is turned on, the reset circuit 70 performs a so-called power-on reset that maintains the control circuit 66 in a reset state until a certain period of time has elapsed since the power was turned on.
制御回路６６は制御信号ｅ１１．ｅ２．ｅ３．ｅ４を出
力する。まず制御信号ｅ１はコネクタ２８を介してオン
オフ感知器回路部２４の発光手段１４に設けた発振回路
４０に与えられる。即ち制御回路６６でポーリングアド
レスの一致を判別すると、制御信号ｅｌを発振回路４ｏ
に出方し、制御信号ｅ１に基づいて発光パルスを１つ出
方して散乱光検出のための発光駆動を行なわせる。尚、
アナログ感知器回路部２６を接続した状態で制御信号ｅ
１が出力されないＬレベル状態にあっては、発振回路４
０の自励発振は停止された状態になる。The control circuit 66 receives the control signal e11. e2. e3. Output e4. First, the control signal e1 is applied to the oscillation circuit 40 provided in the light emitting means 14 of the on/off sensor circuit section 24 via the connector 28. That is, when the control circuit 66 determines whether the polling addresses match, the control signal el is sent to the oscillation circuit 4o.
Based on the control signal e1, one light emission pulse is emitted to drive light emission for scattered light detection. still,
When the analog sensor circuit section 26 is connected, the control signal e
In the L level state where 1 is not output, the oscillation circuit 4
The self-oscillation of 0 is stopped.
制御回路６６からの制御信号ｅ２はアナログ出力部６２
に設けられた制御トランジスタ７２に与えられる。制御
トランジスタ７２はベース側に抵抗Ｒ５とＲ６の分圧回
路を有し、抵抗Ｒ７を介してアナログ出力用のトランジ
スタ７４と直列接続される。制御信号ｅ２は第３図のア
ドレス２の感知器で示したようにステート６のタイミン
グでＨレベルとなって制御トランジスタ７２をオンし、
このときトランジスタ７４でサンプルホールド部５８で
サンプルホールドされた受光出力が与えられていること
から、この受光出力に応じた出力電流を伝送路１０に流
すようになる。The control signal e2 from the control circuit 66 is sent to the analog output section 62.
is applied to a control transistor 72 provided in the control transistor 72 . The control transistor 72 has a voltage dividing circuit of resistors R5 and R6 on its base side, and is connected in series with the analog output transistor 74 via a resistor R7. As shown in the sensor at address 2 in FIG. 3, the control signal e2 becomes H level at the timing of state 6 and turns on the control transistor 72.
At this time, since the transistor 74 is given the light reception output sampled and held by the sample and hold section 58, an output current corresponding to this light reception output is caused to flow through the transmission line 10.
制御回路６６からの制御信号ｅ３はアナログ出力部６２
の正常出力用のトランジスタ７６のベースに接続され、
また制御信号ｅ４はアナログ出力部６２の種別出力用の
トランジスタ７８のベースに接続される。トランジスタ
７６．７８はエミッタに抵抗Ｒ８，Ｒ９を接続しており
、この抵抗値により区別可能な電流値を決めている。制
御信号ｅ３は第３図のアドレス２の感知器に示すように
、ステート７のタイミングでＨレベルとなってトランジ
スタ７６をオンし、抵抗Ｒ８で定まる正常出力を示す電
流を火災報知装置に出方する。また、制御信号ｅ４は第
３図のアドレス２の感知器に示すステート８のタイミン
グでＨレベルとなり、トランジスタ７８をオンし、抵抗
Ｒ９で定まる種別を示す電流を火災報知装置に出力する
。The control signal e3 from the control circuit 66 is sent to the analog output section 62.
connected to the base of the transistor 76 for normal output;
The control signal e4 is also connected to the base of the type output transistor 78 of the analog output section 62. The transistors 76 and 78 have resistors R8 and R9 connected to their emitters, and the resistance values determine the distinguishable current values. As shown in the sensor at address 2 in FIG. 3, the control signal e3 becomes H level at the timing of state 7, turns on the transistor 76, and outputs a current indicating a normal output determined by the resistor R8 to the fire alarm device. do. Further, the control signal e4 becomes H level at the timing of state 8 shown in the sensor at address 2 in FIG. 3, turns on the transistor 78, and outputs a current indicating the type determined by the resistor R9 to the fire alarm device.
次に、サンプルホールド部５８にはサンプルホールド回
路８０が設けられ、またサンプルボールド回路８０には
オンオフ感知器回路部２４に設けた受光増幅器４２の出
力が切替手段２２におけるアナログスイッチ４６及びコ
ネクタ２８を介して入力接続される。更に、サンプルボ
ールド回路８０のサンプル動作のタイミング制御のため
、オンオフ感知器回路部２４の発振回路４０の発振出力
がコネクタ２８を介して入力接続される。従って、サン
プルホールド回路８０は制御回路６６からの制御信号ｅ
１より発振回路４０による発光駆動が行なわれたタイミ
ングでアナログスイッチ４６及びコネクタ２８を介して
得られる受光増幅器４２の受光出力をサンプリングして
ホールドし、このホールド出力をアナログ出力部６２の
トランジスタ７４に入力するようになる。尚、サンプル
ホールド部５８には定電圧回路８２とバックアップ用の
コンデンサＣ３が設けられる。Next, the sample hold section 58 is provided with a sample hold circuit 80, and the sample bold circuit 80 is connected to the analog switch 46 and the connector 28 in the switching means 22. The input is connected via. Further, in order to control the timing of the sampling operation of the sample bold circuit 80, the oscillation output of the oscillation circuit 40 of the on/off sensor circuit section 24 is inputted and connected via the connector 28. Therefore, the sample and hold circuit 80 receives the control signal e from the control circuit 66.
1, the light receiving output of the light receiving amplifier 42 obtained through the analog switch 46 and the connector 28 is sampled and held at the timing when the oscillation circuit 40 is driven to emit light, and this held output is sent to the transistor 74 of the analog output section 62. Now you can input. Note that the sample hold section 58 is provided with a constant voltage circuit 82 and a backup capacitor C3.
オンオフ感知器回路部２４とアナログ感知器回路部２６
を接続するコネクタ２８は、オンオフ感知器回路部２４
側にコネクタ端子Ａ、 Ｂ、 Ｃ，Ｄ。On-off sensor circuit section 24 and analog sensor circuit section 26
The connector 28 that connects the on-off sensor circuit section 24
Connector terminals A, B, C, D on the side.
Ｅ、 Ｆを有し、一方、アナログ感知器回路部２６側
に対応するコネクタ端子ａ、 ｂ、 ｃ、 ｄ、
ｅ。E, F, and connector terminals a, b, c, d, corresponding to the analog sensor circuit section 26 side.
e.
ｆを備え、図示のように２つの回路部を接続する。f to connect the two circuit sections as shown.
第４図は本発明の散乱光式煙感知器の感知器構造の一実
施例を示した実施例構造図である。FIG. 4 is a structural diagram showing an embodiment of the sensor structure of the scattered light type smoke detector of the present invention.
第４図において、周囲に煙流入口８４を開口した感知器
カバー８６内には散乱光式煙検出機構８８が設けられる
。即ち、散乱光式煙検出機構８８の右側に発光素子３０
が組み込まれ、発光素子３０からのパルス光は略中央の
検煙領域１２に照射される。検煙領域１２の左側の位置
には受光素子３２が配置されている。図示の状態では、
発光素子３０に対し受光素子３２が対向しているが、平
゛面的に見ると発光素子３０の光軸に対し対向位置から
ずれた位置に受光素子３２の光軸が位置するように配置
されており、従って受光素子３２には検煙領域］、２に
流入した煙による散乱光のみが入射する。尚、検煙領域
１２を囲む上面及び下面にはノイズ光を散乱吸収させる
ための凹凸構造が設けられている。In FIG. 4, a scattered light type smoke detection mechanism 88 is provided inside a sensor cover 86 having a smoke inlet 84 opened therearound. That is, the light emitting element 30 is placed on the right side of the scattered light type smoke detection mechanism 88.
is incorporated, and pulsed light from the light emitting element 30 is irradiated onto the smoke detection area 12 located approximately in the center. A light receiving element 32 is arranged on the left side of the smoke detection area 12. In the illustrated state,
The light-receiving element 32 faces the light-emitting element 30, but when viewed from above, the optical axis of the light-receiving element 32 is located at a position offset from the opposing position with respect to the optical axis of the light-emitting element 30. Therefore, only scattered light from smoke flowing into the smoke detection area 2 is incident on the light receiving element 32. Incidentally, an uneven structure for scattering and absorbing noise light is provided on the upper and lower surfaces surrounding the smoke detection area 12.
このような散乱光式煙検出機構８８の上部には第１のプ
リント基板９０と第２のプリント基板９２が組み込まれ
る。第１のプリント基板９０の表面には第２図に示した
オンオフ感知器回路部２４が実装される。また、第２の
プリント基板９２には第２図に示したアナログ感知器回
路部２６が実装される。２枚のプリント基板９０と９２
はコネクタ２−８を介して上下に重ね合わせて電気的に
接続されると同時に機械的に支持固定される。A first printed circuit board 90 and a second printed circuit board 92 are installed in the upper part of the scattered light type smoke detection mechanism 88. On the surface of the first printed circuit board 90, the on/off sensor circuit section 24 shown in FIG. 2 is mounted. Further, the analog sensor circuit section 26 shown in FIG. 2 is mounted on the second printed circuit board 92. Two printed circuit boards 90 and 92
are vertically stacked and electrically connected via connectors 2-8, and at the same time are mechanically supported and fixed.
コネクタ２８は第５図に取り出して示す構造を有する。The connector 28 has a structure shown in detail in FIG.
第５図は（ａ）に正面図を、（ｂ）に底面図を、（ｃ）
に側面図を示す。Figure 5 shows (a) a front view, (b) a bottom view, and (c) a bottom view.
A side view is shown.
第５図において、９４は絶縁材料で作られたコネクタ本
体であり、コネクタ本体９４の上部に６本のコネクタピ
ンＡ−Ｆ及びａ〜ｆを取り出している。コネクタ本体９
４の上下両側の４本は支持ピン９６を構成する。また、
上部の第２のプリント基板９２側のコネクタピンａ−ｆ
はプリント基板９２を貫通することからストレートなピ
ン構造をもつ。これに対し下側のコネクタピンＡ−Ｆは
プリント基板９０の表面の回路パターンにハンダ付は固
定されることから、第５図（ｂ）、（Ｃ）から明らかな
ように、ピンの先端を横方向に折り曲げた水平部をもち
、この水平部を回路パターンに乗せた状態でハンダ付は
固定される。In FIG. 5, 94 is a connector body made of an insulating material, and six connector pins A-F and a to f are taken out from the upper part of the connector body 94. Connector body 9
The four pins on the upper and lower sides of 4 constitute support pins 96. Also,
Connector pins a-f on the upper second printed circuit board 92 side
Since it passes through the printed circuit board 92, it has a straight pin structure. On the other hand, since the lower connector pins A to F are soldered and fixed to the circuit pattern on the surface of the printed circuit board 90, as is clear from FIGS. 5(b) and (C), the tips of the pins are It has a horizontal part that is bent in the horizontal direction, and the soldering is fixed with this horizontal part placed on the circuit pattern.
第４図の実施例ではプリント基板９ｏと９２の間の１ケ
所にコネクタ２８を設けて電気的且つ機械的に接続して
いるが、実際には２ケ所にコネクタ２８を設けて電気的
且つ機械的に接続することで支持固定を確実に行なうこ
とができる。In the embodiment shown in FIG. 4, the connector 28 is provided at one location between the printed circuit boards 9o and 92 for electrical and mechanical connection, but in reality, the connector 28 is provided at two locations for electrical and mechanical connection. Support and fixation can be achieved reliably by connecting the parts.
また、第４図から明らかなように、コネクタ２８により
プリント基板９０に対しプリント基板９２を積み重ねて
配置することで、従来、１枚のプリン）・基板による回
路の実装面積を約２倍に拡大することができる。このた
め、オンオフ型の感知器回路にアナログ型の感知器回路
を付加することで、回路規模が大きくなっても、第４図
に示す２枚のプリント基板の積層構造をもって感知器の
回路収納部の径を変えることなく組み込むことができる
。一方、感知器収納部の高さ方向については、新たに積
み重ねたプリント基板９２の高さＬ分だけ大きくする必
要があるか、プリント基板９２の高さ方向の要求寸法は
ＩＣやチップ部品の使用により１ｃｍ以下に抑えられ、
回路収納部をプリント基板９２の要求高さＬ分だけ大き
くしたとしても、感知器全体としての小型化を損う度合
はごく僅かで済み、従来の小型化されたオンオフ型感知
器と同等品とすることができる。Furthermore, as is clear from FIG. 4, by arranging the printed circuit board 92 stacked on the printed circuit board 90 using the connector 28, the mounting area of the circuit using a single printed circuit board can be approximately doubled. can do. Therefore, by adding an analog sensor circuit to an on-off sensor circuit, even if the circuit scale becomes large, the sensor circuit housing can be accommodated using the laminated structure of two printed circuit boards as shown in Figure 4. It can be installed without changing the diameter of the On the other hand, regarding the height direction of the sensor storage section, is it necessary to increase it by the height L of the newly stacked printed circuit board 92? It is suppressed to less than 1 cm by
Even if the circuit storage part is made larger by the required height L of the printed circuit board 92, the extent to which the overall size of the sensor will be reduced will be minimal, and the product will be equivalent to the conventional miniaturized on-off type sensor. can do.
更に、コネクタ２８によるプリント基板９０と９２の接
続は電気的接続と同時に機械的な支持固定を行なってい
るため、従来のプリント基板の積み重ねにおけるような
、間にカラーを入れてビスにより止めるという煩雑な組
立作業を必要とせず、プリント基板の製造工程を通じて
両者を電気的且つ機械的に接続することができる。Furthermore, since the connection between the printed circuit boards 90 and 92 by the connector 28 is not only an electrical connection but also a mechanical support and fixation, it is not necessary to insert a collar between them and fasten them with screws, unlike the conventional stacking of printed circuit boards. The two can be electrically and mechanically connected through the printed circuit board manufacturing process without requiring extensive assembly work.
［発明の効果］
以上説明してきたように本発明によれば、従来のオンオ
フ型感知器回路に切替手段を設け、別途準備された、例
えばアナログ感知器回路を付加するだけで散乱光式煙検
出機構発光手段及び受光手段を共通化したアナログ型の
散乱光式煙感知器を簡単に実現することができる。[Effects of the Invention] As described above, according to the present invention, a switching means is provided in a conventional on-off type sensor circuit, and a scattered light type smoke detection can be performed simply by adding a separately prepared analog sensor circuit, for example. It is possible to easily realize an analog type scattered light type smoke detector in which the mechanical light emitting means and the light receiving means are shared.
また、オンオフ感知器回路部とアナログ感知器回路部を
別のプリント基板に実装し、両者をコネクタを間に介し
て高さ方向に積み重ねて電気的且つ機械的に接続したこ
とで、感知器の回路収納部の寸法拡大を最小限に抑える
ことができ、小型且つ薄型化された従来のオンオフ型感
知器と同等品を得ることができる。In addition, the on/off sensor circuit and analog sensor circuit are mounted on separate printed circuit boards, and by stacking them vertically with connectors in between and electrically and mechanically connecting them, the sensor It is possible to minimize the size expansion of the circuit housing portion, and it is possible to obtain a smaller and thinner product equivalent to the conventional on-off type sensor.
更に、アナログ型感知器の製造につき、オンオフ型感知
器との回路部の共通化が実現され、回路部の共通化によ
り生産効率の向上とコストダウンを図ることができる。Furthermore, when manufacturing an analog type sensor, it is possible to share a circuit part with an on-off type sensor, and by sharing the circuit part, production efficiency can be improved and costs can be reduced.
第１図は本発明の基本的な実施例構成図；第２図は本発
明の具体的な実施例構成図；第３図は呼出クロックと感
知器応答タイミングを示したタイムチャート；
第４図は本発明の感知器構造の実施例構造図；第５図は
第４図のコネクタを取出して示した説明図である。
図中、
１０：伝送路
１２：検煙領域
１４：発光手段
１６：受光手段
１８：第１出力手段
２０：°第２出力手段
２２；切替手段
２４：オンオフ感知器回路部
６
８
０
２
６
８
０
２
４４゜
８
０
２
５４゜
６
８
０
２
４
：アナログ感知器回路部
コネクタ
：発光素子
：受光素子
：回線接続部
：ダイオードブリッジ
：発振回路
受光増幅器
４６：アナログスイッチ
：インバータ
ｚオンオフ判定回路
：５ＣＲ
８２：定電圧回路
：伝送制御部
：サンプルホールド部
：クロツク検出部
：アナログ出力部
クロック検出回路
６６：制御回路
６８ニアドレス設定回路
７０：リセット回路
７２：制御トランジスタ
７４：アナログ出力用のトランジスタ
７６：正常出力用のトランジスタ
７８：種別出力用のトランジスタ
８０：サンプルホールド回路
８４：煙流入口
８６二カバー
８８：散乱光式煙検出機構
９０：第１プリント基板
９２：第２プリント基板
９４：コネクタ本体
９６：支持ピン
Ａ−Ｆ、ａ−ｆ：コネクタ端子
（コネクタビン）
（ａ）
（ｂ）
第５図
（Ｃ）Fig. 1 is a block diagram of a basic embodiment of the present invention; Fig. 2 is a block diagram of a specific embodiment of the present invention; Fig. 3 is a time chart showing the ringing clock and sensor response timing; Fig. 4 5 is a structural diagram of an embodiment of the sensor structure of the present invention; FIG. 5 is an explanatory diagram showing the connector of FIG. 4 taken out. In the figure, 10: transmission line 12: smoke detection area 14: light emitting means 16: light receiving means 18: first output means 20: second output means 22; switching means 24: on/off sensor circuit section 6 8 0 2 6 8 0 2 44゜8 0 2 54゜6 8 0 2 4: Analog sensor circuit connector: Light emitting element: Light receiving element: Line connection part: Diode bridge: Oscillation circuit Light receiving amplifier 46: Analog switch: Inverter z on/off judgment circuit: 5CR 82: Constant voltage circuit: Transmission control section: Sample hold section: Clock detection section: Analog output section Clock detection circuit 66: Control circuit 68 Near address setting circuit 70: Reset circuit 72: Control transistor 74: Analog output transistor 76 : Normal output transistor 78 : Type output transistor 80 : Sample hold circuit 84 : Smoke inlet 86 2 covers 88 : Scattered light smoke detection mechanism 90 : First printed circuit board 92 : Second printed circuit board 94 : Connector body 96: Support pin A-F, a-f: Connector terminal (connector pin) (a) (b) Figure 5 (C)
Claims (1)
煙感知器に於いて、 検煙領域に向けて光を出力する発光手段と；前記検煙領
域に侵入した煙による前記発光手段からの光の散乱光を
受光し、電気信号に変換して出力する受光手段と； 該受光手段の受光出力が所定の閾値レベルを越えた時に
前記伝送線路を介して前記火災警報装置に火災検出信号
を出力する第１出力手段と；前記受光手段の受光出力か
ら第１出力手段とは異なる火災判断のための火災検出情
報を求め、該火災検出情報を前記伝送線路を介して前記
火災報知装置に伝送する着脱自在な第２出力手段と；該
第２出力手段の装着時に前記第１出力手段に接続してい
る前記受光手段の受光出力を切離して該第２出力手段に
接続する切替手段と； を備えたことを特徴とする散乱光式煙感知器。 ２、前記発光手段、受光手段、第１出力手段及び切替手
段によりオンオフ感知器回路部を構成し、前記第２出力
部により前記受光手段の受光出力をサンプリングしてア
ナログ火災検出情報として出力するアナログ感知器回路
部を構成したことを特徴とする請求項１記載の散乱光式
煙感知器。 ３、前記オンオフ感知器回路部を第１プリント基板に実
装し、前記アナログ感知器回路部を第２プリント基板に
実装し、該第１プリント基板と第２プリント基板を感知
器の高さ方向に重ねてプリント基板間をコネクタにより
電気的に接続すると同時に機械的に支持固定したことを
特徴とする請求項２記載の散乱光式煙感知器。[Claims] 1. In a scattered light smoke detector connected to a fire alarm device via a transmission line, a light emitting means for outputting light toward a smoke detection area; a light-receiving means for receiving scattered light from the light-emitting means due to smoke, converting it into an electrical signal and outputting it; a first output means for outputting a fire detection signal to a fire alarm device; obtaining fire detection information for fire judgment different from the first output means from the light receiving output of the light receiving means, and transmitting the fire detection information to the transmission line; detachable second output means for transmitting data to the fire alarm device via the fire alarm device; when the second output means is installed, the light receiving output of the light receiving means connected to the first output means is disconnected; A scattered light type smoke detector characterized by comprising: a switching means for connecting to; and; 2. The light emitting means, the light receiving means, the first output means, and the switching means constitute an on/off sensor circuit section, and the second output section samples the light receiving output of the light receiving means and outputs it as analog fire detection information. 2. The scattered light type smoke sensor according to claim 1, further comprising a sensor circuit section. 3. Mount the on-off sensor circuit section on a first printed circuit board, mount the analog sensor circuit section on a second printed circuit board, and place the first printed circuit board and the second printed circuit board in the height direction of the sensor. 3. The scattered light type smoke detector according to claim 2, wherein the printed circuit boards are electrically connected by a connector and at the same time mechanically supported and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2048426A JP2539937B2 (en) | 1990-02-28 | 1990-02-28 | Scattered light smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2048426A JP2539937B2 (en) | 1990-02-28 | 1990-02-28 | Scattered light smoke detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03250395A true JPH03250395A (en) | 1991-11-08 |
| JP2539937B2 JP2539937B2 (en) | 1996-10-02 |
Family
ID=12803012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2048426A Expired - Fee Related JP2539937B2 (en) | 1990-02-28 | 1990-02-28 | Scattered light smoke detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2539937B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0652470A (en) * | 1992-07-28 | 1994-02-25 | Matsushita Electric Works Ltd | Photoelectric smoke sensor |
| JPH0652467A (en) * | 1992-07-28 | 1994-02-25 | Matsushita Electric Works Ltd | Photoelectric smoke sensor |
| WO2001055991A1 (en) * | 2000-01-26 | 2001-08-02 | Matsushita Electric Works, Ltd. | Method of fabricating a fire detector |
| WO2004001694A1 (en) * | 2002-06-20 | 2003-12-31 | Siemens Building Technologies Ag | Fire detector |
| US8907802B2 (en) | 2012-04-29 | 2014-12-09 | Valor Fire Safety, Llc | Smoke detector with external sampling volume and ambient light rejection |
| US8947244B2 (en) | 2012-04-29 | 2015-02-03 | Valor Fire Safety, Llc | Smoke detector utilizing broadband light, external sampling volume, and internally reflected light |
| US9140646B2 (en) | 2012-04-29 | 2015-09-22 | Valor Fire Safety, Llc | Smoke detector with external sampling volume using two different wavelengths and ambient light detection for measurement correction |
| US9482607B2 (en) | 2012-04-29 | 2016-11-01 | Valor Fire Safety, Llc | Methods of smoke detecting using two different wavelengths of light and ambient light detection for measurement correction |
-
1990
- 1990-02-28 JP JP2048426A patent/JP2539937B2/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0652470A (en) * | 1992-07-28 | 1994-02-25 | Matsushita Electric Works Ltd | Photoelectric smoke sensor |
| JPH0652467A (en) * | 1992-07-28 | 1994-02-25 | Matsushita Electric Works Ltd | Photoelectric smoke sensor |
| WO2001055991A1 (en) * | 2000-01-26 | 2001-08-02 | Matsushita Electric Works, Ltd. | Method of fabricating a fire detector |
| AU762208B2 (en) * | 2000-01-26 | 2003-06-19 | Matsushita Electric Works Ltd. | Method of fabricating a fire detector |
| WO2004001694A1 (en) * | 2002-06-20 | 2003-12-31 | Siemens Building Technologies Ag | Fire detector |
| EP1376505A1 (en) * | 2002-06-20 | 2004-01-02 | Siemens Building Technologies AG | Fire detector |
| AU2003233745B2 (en) * | 2002-06-20 | 2008-03-13 | Siemens Schweiz Ag | Fire detector |
| US7463159B2 (en) | 2002-06-20 | 2008-12-09 | Siemens Building Technologies Ag | Fire detector |
| CN100449573C (en) * | 2002-06-20 | 2009-01-07 | 瑞士西门子有限公司 | Fire detector |
| US8907802B2 (en) | 2012-04-29 | 2014-12-09 | Valor Fire Safety, Llc | Smoke detector with external sampling volume and ambient light rejection |
| US8947244B2 (en) | 2012-04-29 | 2015-02-03 | Valor Fire Safety, Llc | Smoke detector utilizing broadband light, external sampling volume, and internally reflected light |
| US8947243B2 (en) | 2012-04-29 | 2015-02-03 | Valor Fire Safety, Llc | Smoke detector with external sampling volume and utilizing internally reflected light |
| US8952821B2 (en) | 2012-04-29 | 2015-02-10 | Valor Fire Safety, Llc | Smoke detector utilizing ambient-light sensor, external sampling volume, and internally reflected light |
| US9140646B2 (en) | 2012-04-29 | 2015-09-22 | Valor Fire Safety, Llc | Smoke detector with external sampling volume using two different wavelengths and ambient light detection for measurement correction |
| US9142113B2 (en) | 2012-04-29 | 2015-09-22 | Valor Fire Safety, Llc | Smoke detector with external sampling volume using two different wavelengths and ambient light detection for measurement correction |
| US9142112B2 (en) | 2012-04-29 | 2015-09-22 | Valor Fire Safety, Llc | Smoke detector with external sampling volume using two different wavelengths and ambient light detection for measurement correction |
| US9470626B2 (en) | 2012-04-29 | 2016-10-18 | Valor Fire Safety, Llc | Method of smoke detection with direct detection of light and detection of light reflected from an external sampling volume |
| US9482607B2 (en) | 2012-04-29 | 2016-11-01 | Valor Fire Safety, Llc | Methods of smoke detecting using two different wavelengths of light and ambient light detection for measurement correction |
| US10041877B2 (en) | 2012-04-29 | 2018-08-07 | Valor Fire Safety, Llc | Smoke detection using two different wavelengths of light and additional detection for measurement correction |
| US10712263B2 (en) | 2012-04-29 | 2020-07-14 | Valor Fire Safety, Llc | Smoke detection using two different wavelengths of light and additional detection for measurement correction |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2539937B2 (en) | 1996-10-02 |
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