JPS6332687A - Photoelectric type analog smoke sensor - Google Patents
Photoelectric type analog smoke sensorInfo
- Publication number
- JPS6332687A JPS6332687A JP17638886A JP17638886A JPS6332687A JP S6332687 A JPS6332687 A JP S6332687A JP 17638886 A JP17638886 A JP 17638886A JP 17638886 A JP17638886 A JP 17638886A JP S6332687 A JPS6332687 A JP S6332687A
- Authority
- JP
- Japan
- Prior art keywords
- analog smoke
- smoke detector
- circuit
- amplifier circuit
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000779 smoke Substances 0.000 title claims description 31
- 230000003321 amplification Effects 0.000 claims description 16
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 16
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 （技術分野〕 本発明は、光電式アナログ煙感知器の改良に関する。[Detailed description of the invention] (Technical field〕 The present invention relates to improvements in photoelectric analog smoke detectors.
光電式アナログ煙感知器は、第６図に示したように、迷
路構造とされたチャンバーＣ内に、発光室Ａと受光室Ｂ
とを設け、受光室Ｂは発光室Ａの発光を直接受光しない
位置に置かれており、チャンバーＣ内に侵入した煙によ
る散乱光を受光室Ｂで検知して煙濃度に応じた信号を得
る構造となっている。なお、図において斜線部分は感知
領域を示す。As shown in Fig. 6, the photoelectric analog smoke detector has a chamber C with a labyrinth structure, a light-emitting chamber A and a light-receiving chamber B.
The light-receiving chamber B is placed in a position where it does not directly receive the light emitted from the light-emitting chamber A, and the light-receiving chamber B detects the scattered light caused by the smoke that has entered the chamber C to obtain a signal according to the smoke concentration. It has a structure. Note that in the figure, the shaded area indicates the sensing area.
第７図は、光電式アナログ煙感知器の基本的な構成を示
した電気回路図であり、発光室Ａ内にはＬＥＤなどの発
光素子ｌＯを間欠的に発光させる発光素子駆動回路ｌを
設け、他方の受光室Ｂ内には、ホトダイオードなどの受
光素子２０を設けた受光信号増幅回路２を設けている。FIG. 7 is an electric circuit diagram showing the basic configuration of a photoelectric analog smoke detector, in which a light emitting element drive circuit l is installed in the light emitting chamber A to cause a light emitting element lO such as an LED to emit light intermittently. In the other light-receiving chamber B, there is provided a light-receiving signal amplification circuit 2 provided with a light-receiving element 20 such as a photodiode.
チャンバーＣ内における煙による散乱光が受光素子２０
により検知されると、受光信号増幅回路２において煙濃
度に応じたレベル信号に光電変換された後増幅され、積
分回路３において積分された出力は、直流増幅回路４に
おいて増幅されて自火報システム側の要求する出力特性
のアナログ信号ＶｏｕＴを得ている。The light scattered by the smoke in the chamber C is detected by the light receiving element 20.
When detected, it is photoelectrically converted into a level signal according to the smoke concentration in the light reception signal amplification circuit 2 and then amplified.The output integrated in the integration circuit 3 is amplified in the DC amplification circuit 4 and sent to the fire alarm system. The analog signal VouT with the output characteristics required by the side is obtained.
本出願人は、このような光電式アナログ煙感知器におい
て、直流増幅回路４を３段の増幅回路を用いて構成した
ものを特願昭６１−６８１４０号などにおいて提案した
が、実際の直流増幅回路部を構成した場合には、各段の
増幅回路＋、 ｎ、 ｍに設けた外付は抵抗の値や
基準電圧、例えば第７図に示したものでは、Ｒ１／Ｒ２
，Ｖｓ １．Ｒ６／Ｒ５，Ｖｓ ２．Ｒ１Ｏ／Ｒ９を逐
一調整して所望の増幅度を得る必要があり、調整箇所が
多く非常に面倒なのが実情である。The present applicant has proposed, in patent application No. 61-68140, etc., a photoelectric analog smoke detector in which the DC amplification circuit 4 is configured using a three-stage amplifier circuit, but the actual DC amplification When the circuit section is configured, the external connections provided to the amplifier circuits +, n, and m of each stage are determined by the resistance value and reference voltage, such as R1/R2 in the case shown in Figure 7.
, Vs 1. R6/R5, Vs 2. In reality, it is necessary to adjust R1O/R9 one by one to obtain the desired amplification degree, which is very troublesome because there are many adjustment points.
本発明の光電式アナログ煙感知器は、積分回路の後段に
設けた３段構成の直流増幅回路の増幅度の調整を容易に
した光電式アナログ煙感知器を提供することを目的とし
ている。The object of the present invention is to provide a photoelectric analog smoke sensor in which the amplification degree of the three-stage DC amplifier circuit provided after the integrating circuit can be easily adjusted.
〔発明の開示〕・
上記目的を達成するため提案される本発明の光電式アナ
ログ煙感知器は、積分回路の後段に設けた直流増幅回路
を、増幅度の規定された３段の増幅回路により構成した
光電式アナログ煙感知器において、上記３段の増幅回路
の所定の２箇所に設けた外付は抵抗を可変調整できる構
成にしたことを特徴としている。[Disclosure of the Invention] In order to achieve the above object, the photoelectric analog smoke detector of the present invention is proposed in which the DC amplifier circuit provided after the integrating circuit is replaced by a three-stage amplifier circuit with a specified amplification degree. The photoelectric analog smoke detector thus constructed is characterized in that external resistances provided at two predetermined locations of the three-stage amplifier circuit are configured to be variably adjustable.
実施例 第１図は、本発明の第一の実施例を示している。Example FIG. 1 shows a first embodiment of the invention.
この例では、第１段、第２段の増幅回路１． Ｉｆの
外付は抵抗は固定となっており、第３段の外付は抵抗Ｒ
８，Ｒ９を可変調整可能としている。In this example, first stage and second stage amplifier circuits 1. The external resistance of If is fixed, and the external resistance of the third stage is R.
8 and R9 can be variably adjusted.
つまり、図においては、Ｒ１／Ｒ２，Ｖｓ ｌ （Ｒ
３、Ｒ４によって定められる）、Ｒ６／Ｒ５は所定値に
予め固定されており、Ｒ８，Ｒ９の可変調整により第３
段の増幅回路■の増幅度と基準電圧Ｖｓ２とが可変でき
る。That is, in the figure, R1/R2, Vs l (R
3, determined by R4), R6/R5 is fixed to a predetermined value in advance, and the third value is determined by variable adjustment of R8 and R9.
The amplification degree and reference voltage Vs2 of the stage amplifier circuit (2) can be varied.
今・Ｖ２（ｘ）を煙濃度Ｘ％／ｍの時のｖ２値Ｖ３（ｘ
）を煙濃度Ｘ％／ｍの時の■３値とする。Ｖ３ （ｘ）
は自火報システム側からの要求による出力特性で、例え
ば第２図に示したように定まった特性を呈する。Now V2(x) is the v2 value V3(x
) is the ■3 value when the smoke density is X%/m. V3 (x)
is an output characteristic based on a request from the fire alarm system, and exhibits a fixed characteristic as shown in FIG. 2, for example.
これに対して、ｖ２は発光素子の発光出力のバラツキな
どによりある程度のバラツキを伴う、そこで、本発明の
第１の実施例では増幅回路■の基準電圧Ｖｓ ２．増幅
度ＲＩＯ／Ｒ９を調整することにより、発光素子の出力
のバラツキを吸収し、自火報システム側の要求するアナ
ログ出力ｖ３を得ている。On the other hand, v2 varies to some extent due to variations in the light emitting output of the light emitting elements, etc. Therefore, in the first embodiment of the present invention, the reference voltage Vs2. By adjusting the amplification degree RIO/R9, variations in the output of the light emitting elements are absorbed, and the analog output v3 required by the fire alarm system is obtained.
次いで、以上の原理を第３図を用いて説明する。Next, the above principle will be explained using FIG. 3.
今、煙濃度Ｏ％／ｍの時のＶ２．Ｖ３をそれぞれＶ２
（０）、Ｖ３ （０）とし、
煙濃度１０％／ｍの時のＶ２．Ｖ３をそれぞれＶ２ （
１０） 、 Ｖ３ （１０）とする。Now, V2 when the smoke density is 0%/m. V3 to V2 respectively
(0), V3 (0), and V2. when the smoke density is 10%/m. V3 and V2 (
10), V3 (10).
ここに、Ｖ２ （０）、Ｖ２ （１Ｇ）は実測値であり
、Ｖ３ （０）、Ｖ３ （１Ｇ）は自火報システム側の
要求により決まる値を示す。Here, V2 (0) and V2 (1G) are actually measured values, and V3 (0) and V3 (1G) are values determined by the request from the fire alarm system.
まづ、煙濃度０％／ｍの状態でＶｓ２＝Ｖ２ （０）す
なわち、Ｖ３−Ｖ２ （０） とｆｔ４様ニＶｓ２ （
すなわちＲ８）を調整する。First, in the state of smoke density 0%/m, Vs2 = V2 (0), that is, V3 - V2 (0) and ft4-like Vs2 (
That is, adjust R8).
次に、煙濃度１０％／ｍの状態で、
ｖ３富Ｖ３ （１Ｇ） 十Ｖ２ （０）−Ｖ３ （０）
となる様にＲＩＯ／Ｒ９を調整する。すると、この時点
では、増幅回路■の出力Ｖ３’は、Ｖ３’−Ｖ３ （１
０）＋Ｖ２ （０）−Ｖ３ （０）となり、これは第３
図に示した様にｖ３をＶ２（０）−Ｖ３ （０）だけ平
行移動したものとなる。Next, at a smoke density of 10%/m, v3 wealth V3 (1G) 10V2 (0)-V3 (0)
Adjust RIO/R9 so that Then, at this point, the output V3' of the amplifier circuit ■ is V3'-V3 (1
0)+V2 (0)-V3 (0), which is the third
As shown in the figure, v3 is translated by V2(0)-V3(0).
最後に、再び煙濃度Ｏ％／ｍの状態にし、ｖ３軍Ｖ３
（０）となる様にＲＩＧ／Ｒ９を調整すれば、増幅回路
■の出力は第２図のｖ３、すなわちシステム側の要求す
る特性に合致したものとなる。Finally, set the smoke density to 0%/m again, and v3 army V3
If RIG/R9 is adjusted so that it becomes (0), the output of amplifier circuit (2) becomes v3 in FIG. 2, that is, it matches the characteristics required by the system.
なお、煙濃度は、上記の０％／ｍと１０％／ｍ以外に、
例えばＯ％／ｍ〜１５％／ｍ或いは０％／ｍと５％／ｍ
の組合わせでも良い。In addition to the above 0%/m and 10%/m, the smoke density is
For example, O%/m to 15%/m or 0%/m and 5%/m
A combination of these may also be used.
第４図は、本発明の光電式アナログ煙感知器の第二の実
施例を示す回路構成図である。FIG. 4 is a circuit diagram showing a second embodiment of the photoelectric analog smoke detector of the present invention.
図において、Ｖｓｌ（すなわちＲ３，Ｒ４で定められる
）、ＶＳ２ （すなわちＲ７，Ｒ８で定められる）、Ｒ
ＩＯ／Ｒ９を固定する。ただし、第５図で示したように
、感知する煙濃度Ｘの最大値Ｘｍａｘ（第５図では、２
２．５％／ｍ）におけるｖｌの値をＶｌ （ｘｍａｘ
）−Ｖｓｌ、Ｖ２と■３の交点のＶ２（あるいはＶ３）
の値をＶｓ２とする。ここで、ｖ３は自火報システム側
が要求する感知器のアナログ出力である。一方、■１は
Ｒ２／Ｒ１を固定すれば、発光素子の出力のバラツキに
よりある程度のバラツキを伴うが、第■の実施例では増
幅回路Ｉ、■の増幅度を調整することにより発光素子の
出力のバラツキを吸収し、自火報システム側の要求する
アナログ出力特性が得られることになる。In the figure, Vsl (i.e. defined by R3, R4), VS2 (i.e. defined by R7, R8), R
Fix IO/R9. However, as shown in Fig. 5, the maximum value Xmax of the detected smoke density X (in Fig. 5, 2
2.5%/m) is the value of vl at Vl (xmax
) - Vsl, V2 (or V3) at the intersection of V2 and ■3
Let the value of be Vs2. Here, v3 is the analog output of the sensor required by the fire alarm system. On the other hand, in (1), if R2/R1 is fixed, there will be some variation due to variations in the output of the light emitting element, but in the embodiment (2), the output of the light emitting element is adjusted by adjusting the amplification degree of the amplifier circuit I, (2). This allows the analog output characteristics required by the fire alarm system to be obtained.
この原理を次に例を挙げて説明する。This principle will be explained next with an example.
今、説明を簡略化するためＲＩＯ／Ｒ９−１とする。こ
の時、Ｖｓｌ＝ＩＶとなる。Now, to simplify the explanation, it will be referred to as RIO/R9-1. At this time, Vsl=IV.
次に調整について述べると、まづ煙濃度ｘｍａｘ（第５
図では、ｘｍａｘ＝２２．５％／ｍ）の状態で■１をＶ
ｌ （ｘｍａｘ）＝Ｖｓｌ−ＩＶとなる様にオペアン
プＯＰＩの増幅度ＡｈつまりＡＩ＝ （１＋Ｒ１／Ｒ２
）を調整する。Next, let's talk about the adjustment. First, smoke density xmax (5th
In the figure, ■1 is V when xmax=22.5%/m)
The amplification degree Ah of the operational amplifier OPI, that is, AI = (1+R1/R2
).
次に煙濃度０％／ｍの状態にし、■２をＶ２（０）（第
５図では５Ｖ）になる様にＲ６／Ｒ５を調整する。ｉＩ
整が完了した状態では、■３はＶ３ （０）−１Ｖと
なる。Next, set the smoke density to 0%/m, and adjust R6/R5 so that ■2 becomes V2 (0) (5V in Fig. 5). iI
In the state where the adjustment is completed, ■3 becomes V3 (0)-1V.
そして、１＋Ｒ１／Ｒ２，Ｒ６／Ｒ５が調整できれば煙
濃度ｘｍａ ｘにおけるｖ３の値は、Ｖ３＝Ｖ （ｘｍ
ａｘ）＝５Ｖとなる（第５図参照）。Then, if 1+R1/R2, R6/R5 can be adjusted, the value of v3 at smoke density xmax x is V3=V (xm
ax)=5V (see Figure 5).
なお、Ｖｓ １． Ｖ２ （０）は第５図に示した以外
の値に定めてもよいことはいうまでもない。In addition, Vs 1. It goes without saying that V2 (0) may be set to a value other than that shown in FIG.
以上の説明より理解されるように、本発明の光電式アナ
ログ煙感知器によれば、自火報システム側の要求する出
力特性を得るために、直流増幅回路部の調整箇所が２箇
所で良いので調整作業が極めて筒車である。As can be understood from the above explanation, according to the photoelectric analog smoke detector of the present invention, in order to obtain the output characteristics required by the self-fire alarm system, the DC amplifier circuit section only needs to be adjusted at two locations. Therefore, the adjustment work is extremely time consuming.
第１図は、本発明の光電式アナログ煙感知器の第一の実
施例における要部構成図、第２図は直流増幅回路の各段
のＰＩ濃度に対する出力特性図、第３図は第一の実施例
における直流増幅回路の出力の調整要領の説明図、第５
図は第二の実施例における直流増幅回路の出力の調整要
領の説明図、第６図は光電式アナログ煙感知器の構造側
口、第７図はその電気的構成図を示す。
（符号の説明）
■・・・発光素子駆動回路
１０・・・発光素子
２・・・受光信号増幅回路
２０・・・受光素子
３・・・積分回路
４・・・直流増幅回路FIG. 1 is a diagram showing the main parts of the first embodiment of the photoelectric analog smoke detector of the present invention, FIG. Explanatory diagram of the procedure for adjusting the output of the DC amplifier circuit in the embodiment of 5th
The figure is an explanatory diagram of the procedure for adjusting the output of the DC amplifier circuit in the second embodiment, FIG. 6 is a side view of the structure of the photoelectric analog smoke detector, and FIG. 7 is a diagram of its electrical configuration. (Explanation of symbols) ■... Light emitting element drive circuit 10... Light emitting element 2... Light receiving signal amplification circuit 20... Light receiving element 3... Integrating circuit 4... DC amplifier circuit
Claims (3)
の規定された３段の増幅回路により構成した光電式アナ
ログ煙感知器において、 上記３段の増幅回路の所定の２箇所に設けた外付け抵抗
を可変調整できる構成にしたことを特徴とする光電式ア
ナログ煙感知器。(1) In a photoelectric analog smoke detector configured with a three-stage amplifier circuit with a specified amplification degree, the DC amplifier circuit installed after the integrating circuit is installed at two predetermined locations of the three-stage amplifier circuit. A photoelectric analog smoke detector characterized by a configuration in which an external resistor can be variably adjusted.
り構成されており、第１段と第２段の増幅回路の増幅度
を規定する外付け抵抗が可変調整可能に構成されたもの
である特許請求の範囲第（１）項記載の光電式アナログ
煙感知器。(2) Each of the three stages of amplifier circuits described above is composed of operational amplifiers, and the external resistor that defines the amplification degree of the first and second stage amplifier circuits is configured to be variably adjustable. A photoelectric analog smoke detector according to claim (1).
構成されており、第３段の増幅度を規定する外付け抵抗
と、基準電圧を規定する外付け抵抗とが可変調整可能に
構成されたものである特許請求の範囲第（１）項記載の
項電式アナログ煙感知器。(3) The above three stages of amplifier circuits are all composed of operational amplifiers, and the external resistor that defines the amplification level of the third stage and the external resistor that defines the reference voltage are configured to be variably adjustable. An electronic analog smoke detector according to claim (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61176388A JP2688895B2 (en) | 1986-07-25 | 1986-07-25 | Photoelectric analog smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61176388A JP2688895B2 (en) | 1986-07-25 | 1986-07-25 | Photoelectric analog smoke detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6332687A true JPS6332687A (en) | 1988-02-12 |
| JP2688895B2 JP2688895B2 (en) | 1997-12-10 |
Family
ID=16012776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61176388A Expired - Lifetime JP2688895B2 (en) | 1986-07-25 | 1986-07-25 | Photoelectric analog smoke detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2688895B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007263944A (en) * | 2005-11-30 | 2007-10-11 | Fuji Electric Device Technology Co Ltd | Input/output characteristic measuring device and method of analog circuit including operational amplifier |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59139493A (en) * | 1983-01-28 | 1984-08-10 | 松下電工株式会社 | Analog output type smoke detection circuit |
-
1986
- 1986-07-25 JP JP61176388A patent/JP2688895B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59139493A (en) * | 1983-01-28 | 1984-08-10 | 松下電工株式会社 | Analog output type smoke detection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007263944A (en) * | 2005-11-30 | 2007-10-11 | Fuji Electric Device Technology Co Ltd | Input/output characteristic measuring device and method of analog circuit including operational amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2688895B2 (en) | 1997-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5816456B2 (en) | optical monitoring device | |
| CA1101941A (en) | Two-terminal photodetectors with inherent ac amplification properties | |
| KR20060042897A (en) | Illuminance sensor | |
| JPS6332687A (en) | Photoelectric type analog smoke sensor | |
| JPS598876B2 (en) | Transmitted light smoke detector | |
| US3859519A (en) | Wide dynamic range omnidirectional optical sensor for detecting nuclear detonations | |
| US5661754A (en) | Receiver arrangement | |
| JPH0330097A (en) | Photoelectric smoke sensor | |
| JP2558691B2 (en) | AC light component amplifier | |
| JPS636820B2 (en) | ||
| JPS61264816A (en) | Optical pulse reception circuit | |
| JPH01226205A (en) | Amplifier with output swing limit | |
| JPH0244218A (en) | Photo detection circuit | |
| JPH0514096A (en) | Light receiving amplifier circuit for photoelectric sensor | |
| JPS59598Y2 (en) | AC light photometry device | |
| JPS6332689A (en) | Photoelectric type analog smoke sensor | |
| Chatzakis et al. | Detection of pulsed neutrons with solid-state electronics | |
| JP2571370B2 (en) | Photoelectric analog smoke detector | |
| JPS62224892A (en) | Photoelectric type analog smoke sensor | |
| JPS6034609U (en) | Photo sensor device | |
| JPS5850643Y2 (en) | Amplifier automatic amplification adjustment circuit | |
| JPH0833963B2 (en) | Photoelectric analog smoke detector | |
| JPH03120115U (en) | ||
| JPH0728182B2 (en) | Preamplifier | |
| JPH04259105A (en) | Amplifier circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |