JPH0610542B2 - Gas shutoff device - Google Patents
Gas shutoff deviceInfo
- Publication number
- JPH0610542B2 JPH0610542B2 JP60051108A JP5110885A JPH0610542B2 JP H0610542 B2 JPH0610542 B2 JP H0610542B2 JP 60051108 A JP60051108 A JP 60051108A JP 5110885 A JP5110885 A JP 5110885A JP H0610542 B2 JPH0610542 B2 JP H0610542B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- microcomputer
- current
- signal
- shutoff device
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
- F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/08—Microprocessor; Microcomputer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/10—Fail safe for component failures
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
- Safety Devices In Control Systems (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はガス供給の総合的な安全を保証するガス遮断装
置に関するものである。Description: FIELD OF THE INVENTION The present invention relates to a gas shutoff device that ensures the overall safety of a gas supply.
従来の技術 近年、ガス遮断装置はマイクロエレクトロニクスの発達
により小型で低コストになり一般家庭に普及してきてい
る。2. Description of the Related Art In recent years, gas breakers have become small and low-cost due to the development of microelectronics, and have become popular in ordinary households.
以下図面を参照しながら、上述した従来のガス遮断装置
の一例について説明する。An example of the above-described conventional gas shutoff device will be described below with reference to the drawings.
１はガスメータ、２はガス遮断装置、３はガスメータ１
に取り付けた流量センサ、４は流量インタフェイス、５
はマイクロコンピュータ、６は電池、７は弁の駆動部、
８は抵抗、９はトランジスタ、１０は遮断弁である。1 is a gas meter, 2 is a gas shutoff device, 3 is a gas meter 1
Attached to the flow sensor, 4 is a flow interface, 5
Is a microcomputer, 6 is a battery, 7 is a valve drive,
Reference numeral 8 is a resistor, 9 is a transistor, and 10 is a shutoff valve.
以上のように構成されたガス遮断装置について、以下そ
の動作について説明する。第２図矢印の如くガス通路１
４をガスが流水し、流量センサ３からガス流量信号を流
量インタフェース４を介してマイクロコンピュータ５に
伝える。マイクロコンピュータ５はガス流量に異常があ
った場合とか、ある流量が異常時間続いた場合に、弁の
駆動部７に信号を伝え、遮断弁１０を動作させガス通路
１４を遮断する。The operation of the gas shutoff device configured as described above will be described below. Fig. 2 Gas passage 1 as shown by the arrow
4 flows gas, and a gas flow rate signal from the flow rate sensor 3 is transmitted to the microcomputer 5 via the flow rate interface 4. The microcomputer 5 transmits a signal to the valve driving unit 7 to operate the shutoff valve 10 to shut off the gas passage 14 when the gas flow rate is abnormal or when a certain flow rate continues for an abnormal time.
発明が解決しようとする問題点 しかしながら上記のような構成では、マイクロコンピュ
ータ５がノイズや経時的なストレスにより正常に動かな
くなったときのフェイルセーフがなされていない。した
がって、遮断弁１０が遮断するべきときに遮断しないの
は非常に危険である。Problems to be Solved by the Invention However, in the above-described configuration, fail-safe is not provided when the microcomputer 5 does not operate normally due to noise or stress over time. Therefore, it is very dangerous that the shutoff valve 10 does not shut off when it should shut off.
本発明は上記問題点に鑑み、マイクロコンピュータが異
常になりマイクロコンピュータの消費電流が多くなった
ときのフェイルセーフを実現したガス遮断装置を提供す
るものである。In view of the above problems, the present invention provides a gas shutoff device that realizes fail-safe when the microcomputer becomes abnormal and the current consumption of the microcomputer increases.
問題点を解決するための手段 上記問題点を解決するために本発明のガス遮断装置は、
ガス流量センサおよび遮断弁と、前記流量センサからの
信号を受けて前記遮断弁を制御するマイクロコンピュー
タと、前記マイクロコンピュータからの信号と電流検知
部の電流の異常信号を受けて前記遮断弁を駆動する駆動
部と、前記マイクロコンピュータの消費電流が所定以上
になったとき電流の異常信号を前記駆動部に出力する電
流検知部とを備えている。Means for Solving the Problems In order to solve the above problems, the gas shutoff device of the present invention is
A gas flow rate sensor and a shutoff valve, a microcomputer for controlling the shutoff valve by receiving a signal from the flow rate sensor, and a drive of the shutoff valve by receiving a signal from the microcomputer and an abnormal current signal of a current detection unit And a current detection unit that outputs an abnormal current signal to the drive unit when the current consumption of the microcomputer exceeds a predetermined level.
作用 本発明は上記した構成によってマイクロコンピュータが
なんらかの異常によりその消費電流が多くなったとき、
この異常電流を電流検知部で検知して電流の異常信号と
して駆動部に出力し、駆動部はこの信号を受けて遮断弁
を閉じることになる。Effect The present invention has the above-described configuration, when the microcomputer consumes a large amount of current due to some abnormality,
This abnormal current is detected by the current detection unit and is output to the drive unit as a current abnormal signal, and the drive unit receives this signal and closes the shutoff valve.
実施例 以下本発明の一実施例のガス遮断装置についてい、図面
を参照しながら説明する。Embodiment A gas shutoff device according to an embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の実施例におけるガス遮断装置の構成図
を示すものである。第１図において１はガスメータ、２
はガス遮断装置、３はガスメータに取りつけた流量セン
サ、４は流量インタフェース、５はマイクロコンピュー
タ、６は電池、７は駆動部で、８は抵抗、９はトランジ
スタ、１３はマイクロコンピュータからの信号と電流検
知部からの信号を受けてトランジスタ９をスイッチング
するアンドゲート、１０はガスメータ１へのガス通路１
４に設けた遮断弁、１１はマイコン５の消費電流を検知
し、駆動部７に電流の異常信号を出力する電流検知部、
１２は電流検知部１１の具体的な手段である抵抗であ
る。FIG. 1 is a block diagram of a gas shutoff device according to an embodiment of the present invention. In FIG. 1, 1 is a gas meter, 2
Is a gas shutoff device, 3 is a flow rate sensor attached to a gas meter, 4 is a flow rate interface, 5 is a microcomputer, 6 is a battery, 7 is a drive unit, 8 is a resistor, 9 is a transistor, and 13 is a signal from a microcomputer. An AND gate 10 for switching the transistor 9 in response to a signal from the current detector is a gas passage 1 to the gas meter 1.
A shutoff valve provided at 4, a current detection unit 11 that detects the current consumption of the microcomputer 5 and outputs an abnormal current signal to the drive unit 7,
Reference numeral 12 is a resistor which is a specific means of the current detector 11.
以上のように構成されたガス遮断装置について、以下第
１図を用いてその動作を説明する。The operation of the gas shutoff device configured as described above will be described below with reference to FIG.
電流検出部１１の抵抗１２のａ点は、マイクロコンピュ
ータ５が正常の場合は電流が少なく抵抗１２の電圧降下
がほとんどなく電池６の電圧とほぼ同じである。しか
し、なんらかの理由、例えばノイズや経時的なストレス
等によりマイクロコンピュータ５が異常になり、その消
費電流が多くなると抵抗１２の電圧降下が大きくなりａ
点の電位が下がる。ａ点の電位が下がるとアンドケート
１３の出力が低くなりトランジスタ９をオンし、遮断弁
１０を作動する。The point a of the resistor 12 of the current detecting unit 11 is almost the same as the voltage of the battery 6 when the microcomputer 5 is normal, the current is small and there is almost no voltage drop in the resistor 12. However, if the microcomputer 5 becomes abnormal due to some reason, for example, noise or stress over time, and the current consumption increases, the voltage drop across the resistor 12 increases.
The potential at the point drops. When the potential at the point a decreases, the output of the AND gate 13 decreases, turning on the transistor 9 and operating the shutoff valve 10.
以上のように本実施例によれば、電流検出部を設けるこ
とにより、マイクロコンピュータが異常になりその電流
が多くなったときのフェイルセーフを実現することがで
きる。なお、通常時におけるガス流量に異常があった時
のガス遮断装置２の動作は上記従来例と同じなので、従
来例と同じ部分に同一番号をつけて詳細な説明は省略す
る。As described above, according to the present embodiment, by providing the current detecting section, it is possible to realize fail-safe when the microcomputer becomes abnormal and its current increases. The operation of the gas shutoff device 2 when there is an abnormality in the gas flow rate in the normal state is the same as that in the above-described conventional example, and therefore the same parts as those in the conventional example are denoted by the same reference numerals and detailed description thereof will be omitted.
発明の効果 以上のように本発明は電流検出部を設けることによっ
て、マイクロコンピュータが異常になり消費電流が多く
なったときに、遮断弁を駆動してフェイルセーフを行な
うことができる。また、これを簡単に低コストで実現す
ることができる。As described above, according to the present invention, by providing the current detector, the shut-off valve can be driven to perform fail-safe when the microcomputer becomes abnormal and the current consumption increases. Further, this can be easily realized at low cost.
第１図は本発明の実施例におけるガス遮断装置の回路
図、第２図は従来のガス遮断装置の回路図である。 ３……ガス流量センサ、５……マイクロコンピュータ、
７……駆動部、１０……遮断弁、１１……電流検出部。FIG. 1 is a circuit diagram of a gas shutoff device according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional gas shutoff device. 3 ... Gas flow sensor, 5 ... Microcomputer,
7 ... Drive unit, 10 ... Shut-off valve, 11 ... Current detection unit.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−183771（ＪＰ，Ａ) 特開 昭59−69577（ＪＰ，Ａ) 特公 昭58−9443（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-183771 (JP, A) JP-A-59-69577 (JP, A) JP-B-58-9443 (JP, B2)
Claims (1)
断弁と、前記流量センサからの信号を受けて前記遮断弁
を制御するマイクロコンピュータと、前記マイクロコン
ピュータからの信号と電流検知部の電流の異常信号を受
けて前記遮断弁を駆動する駆動部と、前記マイクロコン
ピュータの消費電流が所定以上になったとき電流の異常
信号を前記駆動部に出力する電流検知部とを備えたガス
遮断装置。1. A gas flow rate sensor and a shutoff valve provided in a gas passage, a microcomputer for controlling the shutoff valve by receiving a signal from the flow rate sensor, and a signal from the microcomputer and a current of a current detection unit. A gas shutoff device comprising: a drive unit that receives an abnormal signal to drive the shutoff valve; and a current detection unit that outputs an abnormal current signal to the drive unit when the current consumption of the microcomputer exceeds a predetermined level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60051108A JPH0610542B2 (en) | 1985-03-14 | 1985-03-14 | Gas shutoff device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60051108A JPH0610542B2 (en) | 1985-03-14 | 1985-03-14 | Gas shutoff device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61208432A JPS61208432A (en) | 1986-09-16 |
| JPH0610542B2 true JPH0610542B2 (en) | 1994-02-09 |
Family
ID=12877606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60051108A Expired - Lifetime JPH0610542B2 (en) | 1985-03-14 | 1985-03-14 | Gas shutoff device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0610542B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4550381B2 (en) * | 2003-07-09 | 2010-09-22 | 株式会社金門製作所 | Gas meter |
| JP2006003306A (en) * | 2004-06-21 | 2006-01-05 | Matsushita Electric Ind Co Ltd | Gas-blast circuit breaker |
-
1985
- 1985-03-14 JP JP60051108A patent/JPH0610542B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61208432A (en) | 1986-09-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |