JPS5843796B2 - Kanchikiniokerkenshiyutsuhoshiki - Google Patents
KanchikiniokerkenshiyutsuhoshikiInfo
- Publication number
- JPS5843796B2 JPS5843796B2 JP10737675A JP10737675A JPS5843796B2 JP S5843796 B2 JPS5843796 B2 JP S5843796B2 JP 10737675 A JP10737675 A JP 10737675A JP 10737675 A JP10737675 A JP 10737675A JP S5843796 B2 JPS5843796 B2 JP S5843796B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- signal
- flop
- flip
- level
- 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
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Description
【発明の詳細な説明】
この発明は各種感知器殊に煙感知器の検出方式に関する
もので、その目的とするところは異常時検出の確実性を
増し、誤報を防止せんとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detection method for various sensors, particularly smoke detectors, and its purpose is to increase the reliability of abnormality detection and prevent false alarms.
通常この種感知器の異常時検出は、パルス出力をスレシ
ホールドレベルで判断するが、パルスが立ち上がりの領
域にあってはレベル以下となることがあり、誤報の因を
なしていた。Normally, this type of sensor detects an abnormality by determining the pulse output based on a threshold level, but when the pulse is in the rising region, it may fall below the level, causing false alarms.
本発明はこうした点に鑑み受光側出力のスレシホールド
レベル以下でクリア（（ｌｅａｒ）、以上でノークリア
（ｎｏ ｃｌｅａｒ ）とし、このノークリアの領域で
発振回路の信号が高レベルから低レベルに変化したとき
異常信号がトリガされるように回路構成したもので以下
附図実施例に基いて説明する。In view of these points, the present invention defines that the output of the light-receiving side is cleared ((lear)) when it is below the threshold level, and is not cleared (no clear) when it is above the threshold level, and the signal of the oscillation circuit changes from a high level to a low level in this no-clear region. The circuit is configured such that an abnormal signal is triggered when the signal is turned on.
第１図は本発明に係るブロック図で図中Ａは発光部Ｂを
駆動する発振回路、０は受光素子、Ｄは槽中部、Ｅは検
出部、ＦはＴフリップフロップを用いたネガティブエツ
ジトリガ回路を夫々示し、このネガティブエツジトリガ
回路Ｆは第２図に示す如くＴフリップフロップＦｔのク
リア端子０に検出部出力２を、〒入力端子に発光人力１
を入力して構成されるものである。FIG. 1 is a block diagram according to the present invention, in which A is an oscillation circuit that drives the light emitting part B, 0 is a light receiving element, D is the middle of the tank, E is a detection part, and F is a negative edge trigger using a T flip-flop. As shown in FIG. 2, this negative edge trigger circuit F has a detection section output 2 connected to the clear terminal 0 of the T flip-flop Ft, and a light emitting power 1 connected to the input terminal 1 of the T flip-flop Ft.
It is configured by inputting the following.
今、発振回路Ａに同期した信号で発光部Ｂを駆動しその
光出力を受光部で受けている時、スレシホールドレベル
以上の検出部出力２を得た場合は投・受光器間に煙等が
存在し異常状態にあることを報知しなければならないが
この異常警告を「艮国発するのではなく受光部での立ち
上がり領域での立ち上がりの悪さを考慮して第３図２の
波形でスレシホールドレベル以下ではクリア、以上でノ
ークリアとする機能を第２図の２→３の回路で実現した
上ＴフリップフロップＦ１のクリア端子Ｃに人力する。Now, when the light emitting part B is driven by a signal synchronized with the oscillation circuit A and the light output is received by the light receiving part, if the detection part output 2 is higher than the threshold level, smoke will be generated between the emitter and the receiver. etc., and it is necessary to notify that there is an abnormal condition. However, this abnormal warning should not be issued by issuing a warning, but by taking into consideration the poor rise in the rise area of the light receiving section, the waveform shown in Figure 3 2 should be used. The function of clearing below the threshold level and not clearing above it is manually applied to the clear terminal C of the upper T flip-flop F1, which is realized by the circuit 2→3 in FIG.
一方ＴフリップフロップＦ１の入力端子には発振回路Ａ
からの同期信号１（この発振波形は第３図１参照）を入
力させているので第３図の波形３におけるノークリア領
域内で前記第３図１の発振波形レベルがＨ−Ｉ−Ｌに動
作するとＴフリップフロップＦ１の亘端子出力４は高レ
ベルから低レベルに動作し第３図の４のシグナルが得ら
れ異常信号となるのである。On the other hand, the oscillation circuit A is connected to the input terminal of the T flip-flop F1.
Since the synchronization signal 1 (see FIG. 3 1 for this oscillation waveform) from the oscillation waveform 1 is inputted, the oscillation waveform level in FIG. Then, the wide terminal output 4 of the T flip-flop F1 operates from a high level to a low level, and a signal 4 in FIG. 3 is obtained, which becomes an abnormal signal.
又、煙等の検出物体が存在しない通常状態では第３図の
２の出力はスレシホールドレベル以下であり第３図の波
形３はクリア領域のままでありＴフリップフロップＦ１
の〒の入力にかかわらず４のシグナルはＨのままであり
異常信号は出ない。In addition, in a normal state where there is no detection object such as smoke, the output of 2 in FIG. 3 is below the threshold level, and the waveform 3 of FIG. 3 remains in the clear region, and the T flip-flop F1
Regardless of the input of 〒, signal 4 remains H and no abnormal signal is output.
又、第３図の２の波形で受光部の立ち上がり悪さから受
光波形が第４図２／の如くなって了った場合ノークリア
領域は第４図３′の如くなりこの時の発振波形１′がＨ
−Ｌの動作を行う時には既にクリア領域となりＴフリッ
プフロップＦ１の０出力端子の出力波形４′はＨのまま
でありシグナルは得られない。In addition, if the waveform 2 in FIG. 3 ends up becoming as shown in FIG. 4 2/ due to poor rise of the light receiving section, the no-clear region becomes as shown in FIG. 4 3', and the oscillation waveform 1' at this time. is H
When the -L operation is performed, it is already in the clear region, and the output waveform 4' of the 0 output terminal of the T flip-flop F1 remains at H, and no signal is obtained.
以上本発明によれば、受光側出力のスレシホールドレベ
ル以下でクリア、以上でノークリアとしこのノークリア
の領域で発振回路の信号がＨ−＋Ｌに動作するとき異常
信号を発生するように回路構成した結果、受光側出力の
立ち上がりの悪さからもたらされる誤報を確実に防止す
ることが出来る。As described above, according to the present invention, the circuit is configured in such a way that it is cleared when the light receiving side output is below the threshold level, is not cleared when it is above the threshold level, and generates an abnormal signal when the signal of the oscillation circuit operates to H-+L in this no-clear region. As a result, it is possible to reliably prevent false alarms caused by poor rise of the light-receiving side output.
第１図は本発明の一実施例を示すブロック図。
第２図は本発明の主要回路図、第３図、第４図は動作特
性図を夫々示す。
尚図中の符号は、Ａ・・・・・・発振回路、Ｂ・・・・
・・発光部、Ｃ・・・・・・受光素子、Ｄ・・・・・・
増巾部、Ｅ・・・・・検出部、Ｆ・・・・・ネガティブ
エッヂトリガ回路、Ｆｌ・・・・・・Ｔフリップフロッ
プ、１・・・・・・発光信号、２・・・・・・受光信号
、４・・・・・・シグナル、を夫々示す。FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 shows the main circuit diagram of the present invention, and FIGS. 3 and 4 show operational characteristic diagrams, respectively. The symbols in the diagram are A...Oscillation circuit, B...
... Light emitting part, C ... Light receiving element, D ......
Enlargement section, E...Detection section, F...Negative edge trigger circuit, Fl...T flip-flop, 1...Light emission signal, 2... . . . Light reception signal, 4 . . . Signal are shown, respectively.
Claims (1)
以上でノー・クリアとし、このノー・クリアの領域で発
振回路の信号レベルがＨ＋Ｌレベルに変化した時異常信
号がトリガされるようＴフリップ・フロップに受光出力
及び発光出力を入力するように回路構成した事を特徴と
する感知器における検出方式。1 Cleared below the threshold level of the receiving side output,
The circuit configuration is such that when the signal level of the oscillation circuit changes to H+L level in this no-clear region, the abnormal signal is triggered, and the light reception output and light emission output are input to the T flip-flop. A detection method in a sensor that is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10737675A JPS5843796B2 (en) | 1975-09-04 | 1975-09-04 | Kanchikiniokerkenshiyutsuhoshiki |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10737675A JPS5843796B2 (en) | 1975-09-04 | 1975-09-04 | Kanchikiniokerkenshiyutsuhoshiki |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5230486A JPS5230486A (en) | 1977-03-08 |
| JPS5843796B2 true JPS5843796B2 (en) | 1983-09-29 |
Family
ID=14457525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10737675A Expired JPS5843796B2 (en) | 1975-09-04 | 1975-09-04 | Kanchikiniokerkenshiyutsuhoshiki |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5843796B2 (en) |
-
1975
- 1975-09-04 JP JP10737675A patent/JPS5843796B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5230486A (en) | 1977-03-08 |
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