JPH09304134A - Judgment apparatus for gas leak and gas cutoff device - Google Patents
Judgment apparatus for gas leak and gas cutoff deviceInfo
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- JPH09304134A JPH09304134A JP11891196A JP11891196A JPH09304134A JP H09304134 A JPH09304134 A JP H09304134A JP 11891196 A JP11891196 A JP 11891196A JP 11891196 A JP11891196 A JP 11891196A JP H09304134 A JPH09304134 A JP H09304134A
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- flow rate
- determination
- gas
- time
- pattern
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば、各家庭へ
のガス供給入口部位に設けられているガスメータに対し
て設けられ、ガスメータより下手側のガス供給ライン中
にガス漏れ等の異常が発生した場合に、ガス漏れ信号を
生成するガス漏れ判断技術に関するとともに、このよう
なガス漏れ判断技術に基づいて得られるガス漏れ情報に
基づいて、ガス供給ラインへのガスの供給を遮断するガ
ス遮断装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided, for example, for a gas meter provided at a gas supply inlet to each home, and an abnormality such as a gas leak occurs in a gas supply line on the lower side of the gas meter. In the case of performing a gas leak signal, the present invention relates to a gas leak determination technique for generating a gas leak signal, and a gas shutoff device for shutting off gas supply to a gas supply line based on gas leak information obtained based on such a gas leak determination technique. Regarding
【０００２】[0002]
【従来の技術】従来、ガス漏れの検出・判断にあたって
は、ガスメータを通過するガス量に応じて信号を発する
流量測定手段と、この流量測定手段から得られる監視時
系列流量信号データに基づいて、ガス供給ラインに於け
る漏れ信号を生成する漏れ信号生成手段とを備えて、ガ
ス漏れの検出・判断の用を成すとともに、ガス遮断操作
をおこなっていた。2. Description of the Related Art Conventionally, in detecting / determining a gas leak, based on flow rate measuring means for emitting a signal according to the amount of gas passing through a gas meter and monitoring time series flow rate signal data obtained from this flow rate measuring means, A leak signal generating means for generating a leak signal in the gas supply line was provided to detect and judge a gas leak and to perform a gas shutoff operation.
【０００３】このような従来技術の代表例について説明
すると、従来のガス遮断装置は、流量測定手段による監
視時系列流量信号データから、流量変化を確認する流量
変化時点確認手段と、この流量変化時点確認手段によっ
て確認される発生時からの対応する発生時流量の継続時
間を検出する継続時間検出手段とを備え、継続時間検出
手段によって検出される継続時間が予め設定された安全
継続遮断時間を超える場合に、漏れ信号を生成するもの
としていた。この機能を図面に基づいて説明すると、図
２０に示されるように、監視時系列流量信号データが変
化する場合にあっては、各流量変化が増加状態で段階的
に発生する機器点火時と、減少状態で段階的に発生する
機器停止時との関係より、変化流量が同一となる機器点
火時と機器停止時の対応を取って、これらの間の時間間
隔が、余りに長くなる場合（安全継続遮断時間を超える
場合）は、遮断が必要なガス漏れが発生しているものと
判断して、遮断操作をするものとしていた。図２１は、
発生時流量と、この発生時流量に対する継続使用時間の
関係を示しており、実線（もしくは破線）以下の領域に
あっては遮断が必要な状態とは判断されず、これらの以
上の長時間に渡って発生時流量が維持されている場合に
遮断操作が行われる。例えば、図２２に示す例にあって
は、発生時流量は、風呂釜に対応する１．２ｍ3／ｈで
あって、１００分弱の継続的な使用状態があって始めて
ガス漏れと判断され、ガス遮断操作が行われる。A typical example of such a conventional technique will be described. In the conventional gas shutoff device, a flow rate change time point confirmation means for confirming a flow rate change from the monitoring time series flow rate signal data by the flow rate measurement means, and this flow rate change time point. And a duration detecting means for detecting the duration of the corresponding flow rate at the time of occurrence from the time of occurrence confirmed by the confirming means, and the duration detected by the duration detecting means exceeds a preset safety continuation interruption time. In that case, a leak signal was to be generated. This function will be described with reference to the drawings. As shown in FIG. 20, when the monitoring time-series flow rate signal data changes, when the equipment is ignited in which each flow rate change is increased stepwise, If the time interval between these is too long (safety continuation) If the shut-off time is exceeded), it is judged that a gas leak that requires shut-off has occurred, and the shut-off operation is performed. FIG.
The relationship between the flow rate at the time of occurrence and the continuous use time for the flow rate at the time of occurrence is shown. In the area below the solid line (or broken line), it is not judged that the shutoff is necessary, and if the time is longer than these. The shutoff operation is performed when the flow rate at the time of occurrence is maintained. For example, in the example shown in FIG. 22, the flow rate at the time of occurrence is 1.2 m 3 / h, which corresponds to the bath kettle, and it is judged that there is a gas leak only after a continuous usage condition of less than 100 minutes. The gas shutoff operation is performed.
【０００４】さらに、監視時系列流量信号データに基づ
いて、使用される機器の判別をおこない適切な遮断に役
立てようとするものもあった（特開平３−２３６８６４
（この例では、流量と変化流量とを検出して、ニューラ
ルネットワーク手法でパターン認識をおこない正常点火
パターン、正常燃焼パターン、ガス漏れパターンを各別
に識別する））。しかしながら、この技術にあっては、
機器が一段で着火状態になったか、緩点火状態を経てさ
らに所望の着火状態に設定される二段の緩点火が行われ
たかの判断をおこなうことができる程度であった。ここ
で緩点火とは、給湯器などのガス機器の爆発的な点火を
防止するため、ガス流量を機器の定格ガス流量の約４０
〜９０％の範囲で約０．３〜１０秒程度保持しながら点
火を行うガス流量制御方式である。さて、従来、流量測
定手段としては、所謂、膜式の流量測定装置を使用して
いた。ここで、その時間分解能は数秒から数十秒程度で
あった。Further, there has been a device that discriminates the equipment to be used based on the monitoring time-series flow rate signal data and tries to make an appropriate cutoff (Japanese Patent Laid-Open No. 3-236864).
(In this example, the normal flow pattern, the normal combustion pattern, and the gas leakage pattern are individually identified by detecting the flow rate and the changed flow rate and performing pattern recognition by the neural network method)). However, with this technology,
It was only possible to determine whether the device was in the one-stage ignition state or whether the two-stage gentle ignition, which was set to the desired ignition state after the mild ignition state, was performed. Here, the slow ignition means that the gas flow rate is about 40% of the rated gas flow rate of the equipment in order to prevent explosive ignition of the gas equipment such as a water heater.
It is a gas flow rate control method in which ignition is performed while maintaining about 0.3 to 10 seconds in the range of up to 90%. Conventionally, a so-called membrane type flow rate measuring device has been used as the flow rate measuring means. Here, the time resolution was about several seconds to several tens of seconds.
【０００５】[0005]
【発明が解決しようとする課題】さて、上記のようなガ
ス漏れ判断及び遮断技術においては、以下のような問題
があった。 １ 最大発生時流量の安全継続遮断時間基準の遮断の問
題点 この手法の場合は、ガス漏れの判断・遮断が安全継続遮
断時間より後になるため、判断及び遮断操作迄の時間が
長くなる傾向にある。 ２ 特開平３−２３６８６４の限界点 この手法の場合は、ガス機器に固有の流量パターンを事
前に規定せず、正常点火パターン、正常燃焼パターン、
ガス漏れパターンという３種のパターンへの重み付けを
おこなった確率的な判断をおこなうため、判断が概括的
になりやすく、誤判断の確率が高い。さらに、学習の期
間と手間が必要であるとともに、限られた学習に基づく
確率的な判断であるため、学習していない流量パターン
の場合は、これを正しく認識しにくく、誤遮断の傾向が
高くなる。また、流量測定手段の時間分解能が低い（数
秒から数十秒程度）ために、比較的短時間に行われる緩
点火の状態を適切に判断できず、一般家庭等における、
風呂釜、給湯器等のガス機器の点火状態（一般に緩点火
機能を備えている）を的確に把握することが、難しかっ
た。The gas leak determination and shutoff technique as described above has the following problems. 1 Problem of safe continuous shutoff time reference of maximum occurrence flow rate In the case of this method, the judgment and shutoff of gas leak is after the safe continuous shutoff time, so the time until judgment and shutoff operation tends to be long. is there. 2 Limit point of JP-A-3-236864 In the case of this method, the normal flow pattern, the normal combustion pattern,
Since probabilistic judgments are made by weighting three types of gas leak patterns, the judgments are likely to be general and the probability of erroneous judgments is high. In addition, it requires a learning period and effort, and because it is a probabilistic decision based on limited learning, in the case of a flow pattern that has not been learned, it is difficult to recognize this correctly and there is a high tendency for false cutoff. Become. In addition, since the time resolution of the flow rate measuring means is low (from several seconds to several tens of seconds), it is not possible to properly judge the state of slow ignition performed in a relatively short time.
It was difficult to accurately grasp the ignition state (generally provided with a slow ignition function) of gas appliances such as bathtubs and water heaters.
【０００６】本発明はかかる従来の課題を解消すること
を目的とする。An object of the present invention is to solve the above-mentioned conventional problems.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めの本願の請求項１に係わる、ガス供給ライン中に設置
されたガスメータを通過するガス量に応じて信号を発す
る流量測定手段と、この流量測定手段から得られる監視
時系列流量信号データに基づいて、ガス供給ラインに於
ける漏れ信号を生成する漏れ信号生成手段を備えたガス
漏れ判断装置の特徴構成は、以下の通りである。 〔構成〕即ち、前記流量測定手段が、少なくとも０．５
秒の時間分解能を有するものとされ、ガス供給ラインの
下手側に備えられるガス機器が正常点火される場合に認
められる、前記時間分解能より高い時間分解能で計測さ
れた正常点火流量パターンに基づいて予め設定される正
常点火判断基準指標を記憶した記憶手段を備え、監視時
系列流量信号データに基づいて求まる監視流量パターン
指標の正常点火判断基準指標に対する適合判断を行い、
適合しない場合に、漏れ信号を生成する第１漏れ信号生
成手段を備えるのである。 〔作用・効果〕この構成のガス漏れ判断装置において
は、流量測定手段により０．５秒より高い時間分解能で
監視時系列流量信号データが取り込まれ、このデータか
ら監視流量パターン指標が生成される。そして、この監
視流量パターン指標の正常点火判断基準指標に対する適
合判断がおこなわれ、この適合判断に適合しない場合、
第１漏れ信号生成手段が、漏れ信号を生成する。さて、
本願が対象とする一般的な漏れは、図５に示すように、
ほぼ瞬間的に発生するが、ガス機器点火時の流量は時間
領域で一定のパターン形状を有して立ち上がる。この場
合、０．５秒より高い時間分解能を備える場合は、漏れ
と点火による立ち上がりパターンを、流量の無い状態か
ら所定量の流量になるまでの変化経路に沿って把握し
て、判別して漏れの判断を確実におこなうことができ
る。さらに、この判断にあっては、正常点火流量パター
ンに基づいて予め設定された明示的な指標によって、正
常点火かどうかの適合判断をおこない、適合しない場合
に漏れ信号を生成するものとされる。ここで、判断指標
は正常点火流量パターンを典型化して構成するため、比
較的簡単な種類の物理データの組み合わせ（これらは後
に示す、所定流量以上の流量変化が認められる流量変化
発生時からの経過時間、流量、流量変化の傾向等であ
る）から、これを構成できる。従って、指標は簡略化で
きるとともに、正常なパターンからのみ導き出される指
標であるため、適合判断が比較的厳密なものとなる。こ
の例と、ニューラルネットワーク手法の従来技術を比較
すると、後者の場合、正常点火パターンと誤点火パター
ンの両方の学習が必要であり、指標（ニューラルネット
ワーク手法に於ける結合係数）の数が非常に多くなると
いう点で大きく異なる。また、本願の構成にあっては、
ガス漏れ状態の検出を、ガス機器の着火時点で逐次、検
証しながら、ガス漏れに対応できるため、安全継続遮断
時間以降の遮断をおこなうといった従来技術よりも早期
に対応が取れる。In order to achieve the above object, according to claim 1 of the present application, flow rate measuring means for issuing a signal according to the amount of gas passing through a gas meter installed in a gas supply line, The characteristic configuration of the gas leak determination device equipped with the leak signal generating means for generating the leak signal in the gas supply line based on the monitoring time-series flow rate signal data obtained from the flow rate measuring means is as follows. [Structure] That is, the flow rate measuring means is at least 0.5.
Based on the normal ignition flow rate pattern measured with a time resolution higher than the time resolution, which is recognized as having a time resolution of seconds and is recognized when the gas equipment provided on the lower side of the gas supply line is normally ignited. Equipped with a storage means for storing the normal ignition determination reference index to be set, the conformity determination to the normal ignition determination reference index of the monitoring flow rate pattern index obtained based on the monitoring time series flow rate signal data,
A first leak signal generating means is provided for generating a leak signal when the two do not match. [Operation / Effect] In the gas leakage determination apparatus of this configuration, the flow rate measuring means captures the monitoring time-series flow rate signal data with a time resolution higher than 0.5 seconds, and a monitoring flow rate pattern index is generated from this data. Then, a conformity determination is made to the normal ignition determination reference index of the monitored flow rate pattern index, and if the conformity determination is not met,
The first leak signal generation means generates a leak signal. Now,
A general leak targeted by the present application is, as shown in FIG.
Although it occurs almost instantaneously, the flow rate at the time of ignition of the gas equipment rises with a constant pattern shape in the time domain. In this case, when the time resolution is higher than 0.5 seconds, the rise pattern due to leakage and ignition is grasped along the change path from the state without flow rate to the flow rate of a predetermined amount, and it is determined and leaked. Can be surely made. Further, in this determination, it is assumed that a conformity determination as to whether or not the ignition is normal is made by an explicit index preset based on the normal ignition flow rate pattern, and a leak signal is generated when the ignition is not matched. Here, since the judgment index is formed by typifying a normal ignition flow rate pattern, a combination of relatively simple types of physical data (these are the progresses from the time of occurrence of a flow rate change in which a flow rate change above a predetermined flow rate is recognized, which will be shown later). This can be configured from time, flow rate, tendency of flow rate change, etc.). Therefore, since the index can be simplified and the index is derived only from a normal pattern, the matching judgment becomes relatively strict. Comparing this example with the conventional technique of the neural network method, in the latter case, learning of both the normal ignition pattern and the incorrect ignition pattern is required, and the number of indices (coupling coefficients in the neural network method) is very large. The difference is that it will increase. Further, in the configuration of the present application,
Since the gas leak can be dealt with while sequentially verifying the detection of the gas leak state at the time of ignition of the gas equipment, it is possible to take a countermeasure earlier than the conventional technique of performing the shutoff after the safety continuous shutoff time.
【０００８】上記の目的を達成するための本願の請求項
２に係わる、ガス供給ライン中に設置されたガスメータ
を通過するガス量に応じて信号を発する流量測定手段
と、この流量測定手段から得られる監視時系列流量信号
データに基づいて、ガス供給ラインに於ける漏れ信号を
生成する漏れ信号生成手段を備えたガス漏れ判断装置の
特徴構成は、以下の通りである。 〔構成〕前記ガス供給ラインの下手側に備えられるガス
機器が正常点火される場合に、認められる正常点火流量
パターンに基づいて予め設定され、所定流量以上の流量
変化が認められる流量変化発生時からの経過時間、流
量、流量変化の傾向からなる正常点火判断基準指標を記
憶した記憶手段を備え、監視時系列流量信号データに基
づいて、流量変化発生時、この流量変化発生時からの経
過時間、流量及び、流量変化の傾向からなる監視流量パ
ターン指標を演算する流量パターン指標演算手段を備
え、この流量パターン指標演算手段により得られる監視
流量パターン指標が、正常点火判断基準指標に適合する
かどうかの適合判断をおこない、適合しない場合に、前
記漏れ信号を生成する第１信号生成手段を備えるのであ
る。 〔作用・効果〕この構成のガス漏れ判断装置にあって
は、正常点火判断基準指標が流量変化発生時からの経過
時間、流量、流量変化の傾向の組み合わせから構成され
る。そして、これに対応して、監視時系列流量信号デー
タに基づいて、流量変化発生時、この流量変化発生時か
らの経過時間、流量、及び、流量変化の傾向からなる監
視流量パターン指標が求められる。そして、これらの比
較的、簡単な物理量の組み合わせから、正常点火状態の
適合判断が行われる。ここで、各時点の流量の変化の傾
向とは、流量が経時的に増加状態、変化の無い状態、減
少状態にあるかどうかを示す指標であり、例えば、経時
的に取り込まれる連続した信号データにおいて、それら
の傾向により決定される。さて、ガス機器に於ける正常
点火にあっては、これを、流量変化発生時、各時点に於
ける流量及び、各時点に於ける流量変化の傾向から、パ
ターン化することが後に示すように容易であり、このよ
うな比較的簡略化されたパターンとの適合判断をおこな
うことで、機器の点火は、容易且つ簡便に判別できる。
このように構成しておくと、機器が更新されて、新たな
正常点火が発生する場合にあっても、比較的簡単なパラ
メータ変更で、正常点火の判断に的確に対応できる。 〔構成〕請求項２に係わるガス漏れ判断装置において、
前記正常点火判断基準指標として、ガス機器が緩点火さ
れる場合に対応する緩点火対応の正常点火判断基準指標
を備えることが好ましい。これが、請求項３に係わるガ
ス漏れ判断装置の特徴構成である。 〔作用・効果〕一般の家庭等に備えられるガス機器にあ
っては、そのガス使用量の多い機器は、その点火操作と
して、緩点火制御されるものが主流である。一方、この
ような緩点火制御に於ける流量パターンは、比較的分類
しやすく、定型的な流量パターンを示すものであり、所
定量以上の流量変化が発生した時からの経過時間、流
量、流量変化の傾向を捉えるだけで、その適合性を判断
できる。一方、緩点火において現れる流量パターンは、
漏れの発生においては、発生することが無い。従って、
正常点火判断基準指標として、緩点火対応の正常点火判
断基準指標を備え、これと監視流量パターン指標との適
合性の判断をおこなって、適切に緩点火状況を判断で
き、退いては、適切に漏れ信号を生成することができ、
有用である。 〔構成・作用・効果〕さらに、本願のガス漏れ判断装置
において、流量測定手段が、少なくとも０．５秒の時間
分解能を有し、正常点火判断基準指標が、時間分解能以
上の分解能で取られたデータに基づくものであることが
好ましい。この構成が請求項８に係わる。流量測定手段
の時間分解能を０．５秒以下にしておく場合は、ガス機
器の点火が短時間（数秒）単位で起こる場合にあって
も、この点火パターンを高い分解能で、的確に捉えて、
これが、点火によるものか、点火によらないものかを判
断できる。 〔構成・作用・効果〕さらに、本願のガス漏れ判断装置
を備えるとともに、このガス漏れ判断装置から発生され
る漏れ信号の生成に応じてガスを遮断する遮断手段を備
えて、ガス遮断装置を構成することが好ましい。この構
成が請求項９に係わる。本願のガス漏れ判断装置からの
信号に基づいて、遮断手段によりガスの遮断を、比較的
簡単な構造で、確実な遮断をおこなうことができる。According to claim 2 of the present application for achieving the above object, flow rate measuring means for emitting a signal according to the amount of gas passing through a gas meter installed in a gas supply line, and the flow rate measuring means are provided. The characteristic configuration of the gas leak determination device provided with the leak signal generation means for generating the leak signal in the gas supply line based on the monitored time-series flow rate signal data is as follows. [Configuration] When a gas device provided on the lower side of the gas supply line is normally ignited, a preset flow rate pattern is set based on an acceptable normal ignition flow rate pattern, and a flow rate change that is equal to or more than a predetermined flow rate is recognized. Equipped with a storage means that stores a normal ignition determination reference index consisting of the elapsed time, the flow rate, and the tendency of the flow rate change, based on the monitoring time-series flow rate signal data, when the flow rate change occurs, the elapsed time from the time when the flow rate change occurs, A flow rate pattern index calculating means for calculating a flow rate and a monitor flow rate pattern index composed of a tendency of flow rate change is provided, and whether the monitor flow rate pattern index obtained by this flow rate pattern index calculating means matches the normal ignition determination reference index It is provided with a first signal generating means for performing the matching judgment and generating the leak signal when the matching is not found. [Operation / Effect] In the gas leakage determination device having this configuration, the normal ignition determination reference index is composed of a combination of the elapsed time from the occurrence of the flow rate change, the flow rate, and the tendency of the flow rate change. Correspondingly, a monitored flow rate pattern index including the flow rate change occurrence time, the elapsed time from the flow rate change occurrence time, the flow rate, and the tendency of the flow rate change is obtained based on the monitoring time-series flow rate signal data. . Then, the suitability of the normal ignition state is determined from the combination of these relatively simple physical quantities. Here, the tendency of the flow rate change at each time point is an index indicating whether the flow rate is in an increasing state, a unchanged state, or a decreasing state over time, and for example, continuous signal data captured over time. In, it is determined by those tendencies. By the way, in the case of normal ignition in a gas appliance, it is possible to pattern this from the flow rate at each time point when the flow rate change occurs and the tendency of the flow rate change at each time point, as will be shown later. It is easy, and the ignition of the device can be easily and easily determined by performing the matching determination with such a relatively simplified pattern.
With this configuration, even when the device is updated and new normal ignition occurs, it is possible to accurately respond to the determination of normal ignition by a relatively simple parameter change. [Structure] In the gas leakage determination device according to claim 2,
As the normal ignition determination reference index, it is preferable to provide a normal ignition determination reference index for slow ignition corresponding to the case where the gas appliance is slowly fired. This is a characteristic configuration of the gas leakage determination device according to claim 3. [Operation / Effect] In gas appliances installed in general households, etc., appliances having a large gas usage amount are mainly controlled by slow ignition as an ignition operation. On the other hand, the flow rate pattern in such slow ignition control is relatively easy to classify and shows a typical flow rate pattern, and the elapsed time, flow rate, and flow rate from the time when the flow rate change exceeds a predetermined amount The suitability can be judged only by grasping the tendency of change. On the other hand, the flow pattern that appears in slow ignition is
It does not occur when a leak occurs. Therefore,
As a normal ignition determination reference index, a normal ignition determination reference index for slow ignition is provided, and the compatibility of this with the monitored flow pattern index can be determined to appropriately determine the slow ignition status, Can generate a leak signal,
Useful. [Structure / Operation / Effect] Furthermore, in the gas leakage determination device of the present application, the flow rate measuring means has a time resolution of at least 0.5 seconds, and the normal ignition determination reference index is taken with a resolution higher than the time resolution. It is preferably based on data. This configuration relates to claim 8. When the time resolution of the flow rate measuring means is set to 0.5 seconds or less, even if the gas appliance is ignited in a unit of a short time (several seconds), this ignition pattern can be accurately captured with high resolution.
It can be determined whether this is due to ignition or not. [Structure / Operation / Effect] Further, the gas shutoff device is provided with the gas leak determination device of the present application and shutoff means for shutting off gas according to generation of a leak signal generated from the gas leak determination device. Preferably. This configuration relates to claim 9. Based on a signal from the gas leakage determination device of the present application, it is possible to reliably shut off the gas by the shutoff means with a relatively simple structure.
【０００９】[0009]
【発明の実施の形態】以下に本発明の実施の形態を図面
に基づいて説明する。図１９には、このガス遮断装置１
を備えたガスメータ２０とガス供給ライン２１の下手側
に備えられるガス機器２２が模式的に示されている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 19 shows this gas shutoff device 1.
A gas meter 20 provided with and a gas device 22 provided on the lower side of the gas supply line 21 are schematically shown.
【００１０】説明にあたっては、ガス遮断装置１につい
て説明するが、このガス遮断装置１において、漏れ信号
を生成するまでの部位が、本願のガス漏れ判断装置を構
成する。図１は、本発明の一実施例のブロック図であ
る。この実施例のガス遮断装置１は、ガスメーターを通
過するガス量に応じて約０．３秒以下の短い時間単位で
信号を発する流量測定手段２と、流量測定手段２からの
信号を基に監視流量パターン指標（流量変化発生後の経
過時間、流量、流量変化の傾向から構成される）を演算
する流量パターン指標演算手段３と、流量パターン指標
演算手段３から出力に基づきガス機器の緩点火による流
量パターンを認識して機器（機器の点火）と漏洩（ガス
漏れ）を判断し漏洩と判断される場合、漏れ信号を生成
・出力する緩点火パターン認識手段４と、流量パターン
指標演算手段３からの出力に基づきガス機器の自動温度
制御（比例制御）によるガス流量パターンを認識して機
器（機器の自動制御燃焼）と漏洩（ガス漏れ）を判断し
漏洩と判断される場合、漏れ信号を生成・出力する自動
制御パターン認識手段５と、前記緩点火パターン認識手
段４及び前記自動制御パターン認識手段５からの漏れ信
号に応じてガスを遮断する遮断手段６を備えている。In the description, the gas shutoff device 1 will be described. In the gas shutoff device 1, the portion until the leak signal is generated constitutes the gas leak determination device of the present application. FIG. 1 is a block diagram of one embodiment of the present invention. The gas shutoff device 1 of this embodiment monitors based on a signal from the flow rate measuring means 2 which outputs a signal in a short time unit of about 0.3 seconds or less according to the amount of gas passing through the gas meter, and a signal from the flow rate measuring means 2. Flow rate pattern index calculation means 3 for calculating a flow rate pattern index (composed of elapsed time after occurrence of flow rate change, flow rate, tendency of flow rate change), and slow ignition of gas equipment based on output from flow rate pattern index calculation means 3 If the device recognizes the flow rate pattern and determines the device (ignition of the device) and the leak (gas leak) and determines that there is a leak, the slow ignition pattern recognition unit 4 that generates and outputs a leak signal and the flow pattern index calculation unit 3 When the gas flow pattern by the automatic temperature control (proportional control) of the gas equipment is recognized based on the output of the equipment and the equipment (automatically controlled combustion) and leakage (gas leakage) are determined Automatic control pattern recognition means 5 generates and outputs the leakage signal, and a blocking means 6 for shutting off the gas in accordance with the leakage signal from the slow firing pattern recognition means 4 and the automatic control pattern recognition means 5.
【００１１】さらに、本願のガス遮断装置１には、先に
説明した流量パターン指標演算手段３からの出力に基づ
き、所定値以上の流量変化の発生時を確認する流量変化
時点確認手段１００と、この流量変化時点確認手段１０
０によって確認される発生時から、発生時流量の継続時
間を検出する継続時間検出手段１０１とを備え、継続時
間検出手段１０１によって検出される継続時間が予め設
定された安全継続遮断時間を超える場合に、漏れ信号を
生成する安全継続時間超過判別手段１０２を備え、この
手段からの漏れ信号によっても、前記遮断手段６が働い
て、ガス漏洩を遮断する構成とされている。Further, in the gas shutoff device 1 of the present application, the flow rate change time confirmation means 100 for confirming the occurrence of the flow rate change of a predetermined value or more based on the output from the flow rate pattern index calculation means 3 described above, This flow rate change time confirmation means 10
And a duration detecting unit 101 for detecting the duration of the flow rate at the occurrence from the time of occurrence confirmed by 0, and the duration detected by the duration detecting unit 101 exceeds a preset safety continuation interruption time. In addition, the safety continuation time excess judging means 102 for generating a leak signal is provided, and the shutoff means 6 also works by the leak signal from this means to shut off the gas leak.
【００１２】本願のガス遮断装置１においては、ガス機
器の点火時に対応して、緩点火パターン認識手段４によ
るガス漏れの有無の判断、次に、ガス機器の燃焼時に対
応して自動制御パターン認識手段５によるガス漏れの有
無の判断、さらには、最終的に、安全継続時間超過判別
手段１０２によるガス漏れの有無の判断により、合計３
段のガス漏れチェックをおこない、確実なガス漏れ監視
をおこなって、使用者の安全を確保することができる構
成とされている。従って、図１に示すように、これらを
第１漏れ信号生成手段、第３漏れ信号生成手段、第２漏
れ信号生成手段と呼ぶ。さらに流量測定手段２からの信
号により、漏れ信号を生成する手段を漏れ信号生成手段
と呼ぶ（図１参照）。In the gas shutoff device 1 of the present application, the slow ignition pattern recognition means 4 determines whether or not there is a gas leak when the gas equipment is ignited, and then the automatic control pattern recognition is performed when the gas equipment is burned. A total of 3 is determined by the presence / absence of gas leakage by the means 5 and finally by the presence / absence of gas leakage by the safety continuation time excess determination means 102.
It is configured so that the safety of users can be ensured by performing a gas leak check in stages and performing a reliable gas leak monitoring. Therefore, as shown in FIG. 1, these are referred to as a first leak signal generating means, a third leak signal generating means, and a second leak signal generating means. Further, a means for generating a leak signal by a signal from the flow rate measuring means 2 is called a leak signal generating means (see FIG. 1).
【００１３】緩点火パターン認識手段４、自動制御パタ
ーン認識手段５及び安全継続時間超過判別手段１０２に
対して、記憶手段７が設けられている。この記憶手段７
には、前記緩点火パターン認識手段４に於ける判断に必
要な指標である緩点火対応の正常点火判断基準指標、自
動制御パターン認識手段５に於ける判断に必要な指標で
ある比例制御対応の正常使用判断基準指標さらに、安全
継続時間超過判別手段１０２で使用される発生時流量と
許容される継続時間（安全継続遮断時間）との関係指標
である遮断時間対応表が記憶されている。この表を図２
１に示している。ここで、正常点火判断基準指標は、ガ
ス供給ラインの下手側に備えられるガス機器が正常点火
される場合に認められる正常点火流量パターンに基づい
て予め設定され、所定流量以上の流量変化が認められる
流量変化発生時からの経過時間、各時点の流量、各時点
の流量変化の傾向からなるものである。さらに、正常使
用判断基準指標は、ガス供給ラインの下手側に備えられ
るガス機器が正常使用される場合に認められる正常使用
流量パターンに基づいて予め設定され、流量変化が認め
られる流量変化発生時からの経過時間、流量、流量変化
の傾向からなるものである。Storage means 7 is provided for the slow ignition pattern recognition means 4, the automatic control pattern recognition means 5, and the safety continuation time excess determination means 102. This storage means 7
Is a normal ignition determination reference index for slow ignition which is an index required for the determination by the slow ignition pattern recognition means 4, and a proportional control compatible index which is an index required for the determination by the automatic control pattern recognition means 5. Normal Use Judgment Criteria Index Further, a cutoff time correspondence table is stored which is a relational index between the flow rate at occurrence used by the safety continuation time excess determination means 102 and the allowable continuation time (safety continuation cutoff time). This table is shown in Figure 2.
It is shown in FIG. Here, the normal ignition determination reference index is preset based on a normal ignition flow rate pattern recognized when the gas equipment provided on the lower side of the gas supply line is normally ignited, and a flow rate change of a predetermined flow rate or more is recognized. It consists of the elapsed time from the occurrence of the flow rate change, the flow rate at each time point, and the tendency of the flow rate change at each time point. Furthermore, the normal use judgment criterion index is preset based on the normal use flow rate pattern observed when the gas equipment provided on the lower side of the gas supply line is normally used, and when the flow rate change occurs when the flow rate change is recognized. It consists of the elapsed time, the flow rate, and the tendency of the flow rate change.
【００１４】以下、夫々の手段の構成及びその働きにつ
いて順次説明していく。 １ 流量測定手段２ この流量測定手段２は、ガスメーターに付属して備えら
れる流量計であり、所謂、フルイディックメータ（流路
内に、ノズル部とこのノズル部の下手側に備えられる流
路拡大部とを備えて構成され、この流路拡大部に形成さ
れる帰還流（流路方向を上手側に流れる流れ）により振
動的に発生する主流の流路変更の周期を検出して、この
周期から流路を流れる流量を求めるもの）である。この
流量測定手段２は、具体的には約０．３秒以下（ここ
で、本願の目的に適合するためには、０．５秒以下の時
間分解能を有していればよい）の短い時間単位で信号を
発することができる。この流量測定手段２によって測定
された信号が、前記流量パターン指標演算手段３に送ら
れる。The structure and function of each means will be described below. 1 Flow rate measuring means 2 This flow rate measuring means 2 is a flow meter provided in association with a gas meter, and is a so-called fluidic meter (in the flow channel, a nozzle portion and a flow passage enlarged on the lower side of the nozzle portion are enlarged. The cycle of detecting the flow path change of the main flow that is generated oscillatingly by the return flow (flow flowing in the flow direction toward the upper side) formed in the flow path expansion portion is detected. From the flow rate). The flow rate measuring means 2 has a short time of about 0.3 seconds or less (here, in order to meet the purpose of the present application, it has a time resolution of 0.5 seconds or less). A signal can be emitted in units. The signal measured by the flow rate measuring means 2 is sent to the flow rate pattern index calculating means 3.
【００１５】２ 流量パターン指標演算手段３ この流量パターン指標演算手段３は、流量測定手段２か
らの信号を基に、所定流量以上の流量変化が認められる
流量変化発生時、この流量変化発生時からの経過時間、
これ以降の各時点の流量（基本的に流量変化発生時前の
流量を基準とする）、各時点の流量変化の傾向を演算す
るように構成されている。即ち、ガス流量が立ち上がり
後、極大、定常となる時の流量、流量変化発生時からの
経過時間、さらに各時点に於ける流量変化の傾向といっ
た、立上がり後、約１０〜１００秒以内の監視流量パタ
ーン指標を導出する。ここで、流量変化の傾向とは、流
量が経時的に増加傾向、変化の無い傾向、減少傾向にあ
るかどうかの指標であり、例えば、経時的に取り込まれ
る信号データの関係から、それらの傾向が決定される。
この監視流量パターン指標は、後に示す緩点火パターン
認識手段４、自動制御パターン認識手段５及び安全継続
時間超過判別手段１０２の認識・判別の用に供せられ
る。2 Flow rate pattern index calculation means 3 This flow rate pattern index calculation means 3 is based on the signal from the flow rate measurement means 2 when a flow rate change in which a flow rate change of a predetermined amount or more is recognized occurs, Elapsed time of
The flow rate at each time point thereafter (basically, the flow rate before the change in the flow rate is used as a reference) and the tendency of the flow rate change at each time point are calculated. That is, the monitoring flow rate within about 10 to 100 seconds after the rise, such as the flow rate at the time when the gas flow rate rises, becomes maximum or steady, the elapsed time from the occurrence of the flow rate change, and the tendency of the flow rate change at each time point. Derive the pattern index. Here, the tendency of the flow rate change is an index of whether the flow rate has an increasing tendency, a non-changing tendency, or a decreasing tendency over time. For example, from the relationship of the signal data captured over time, those tendencies are shown. Is determined.
The monitored flow rate pattern index is used for recognition / discrimination of the slow ignition pattern recognition means 4, the automatic control pattern recognition means 5 and the safety continuation time excess discrimination means 102 which will be described later.
【００１６】流量パターン指標演算手段３による監視流
量パターン指標の生成は、リアルタイムベースで行われ
る。そして、緩点火パターン認識手段４においては、緩
点火対応の正常点火判断基準指標との適合性判断が行わ
れ、これに適合しない場合に、漏れ信号が生成されて、
遮断操作が行える構成が採用されている。一方、自動制
御パターン認識手段５においては、比例制御対応の正常
使用判断基準指標との適合性判断が行われ、これに適合
しない場合に、漏れ情報が生成されて、遮断操作が行え
る構成が採用されている。The generation of the monitored flow rate pattern index by the flow rate pattern index calculation means 3 is performed on a real-time basis. Then, in the slow ignition pattern recognition means 4, the compatibility determination with the normal ignition determination reference index corresponding to the slow ignition is performed, and when it does not match, a leak signal is generated,
The structure that can perform the shutoff operation is adopted. On the other hand, in the automatic control pattern recognition means 5, the conformity judgment with the normal use judgment standard index corresponding to the proportional control is performed, and if it does not match, the leak information is generated and the interruption operation can be performed. Has been done.
【００１７】先ず、緩点火の監視に関して説明する。図
６には、緩点火及び流量継続時間を監視対象とする遮断
操作スキームが示されている。このスキームにおいて、
流量測定手段２により流量測定が行われ（ステップ
１）、この測定結果が、流量パターン指標演算手段３に
より処理される（ステップ２）。だだし、この処理にお
いては、流量測定手段２において測定されている最先の
データと、この最先の時点から一定の時間（２０〜２０
０秒程度）のデータが記憶されており、このような所定
期間の時系列データを対象として、処理が行われる。そ
して、流量変化が所定値以上（Ａ以上）である場合に、
流量変化が認められたと判断される（発生時流量が発生
したと判断される）（ステップ３）。このデータから変
化が認められ無い場合は、流量測定を繰り返す。一方、
流量変化が認められた場合は、緩点火パターン認識手段
４による適合判断をおこない（ステップ４）、緩点火パ
ターンである場合は、安全継続遮断時間の延長をおこな
い（ステップ５）、さらに、安全継続遮断時間による遮
断判断をおこなう（ステップ６）。一方、適合判断にお
いて、緩点火パターンに適合しないと判断された場合
は、漏れ信号の生成を介して、遮断操作をおこなう（ス
テップ７）。First, the slow ignition monitoring will be described. FIG. 6 shows a shutoff operation scheme in which slow ignition and flow duration are monitored. In this scheme,
The flow rate measuring means 2 measures the flow rate (step 1), and the measurement result is processed by the flow rate pattern index calculating means 3 (step 2). However, in this process, the earliest data measured by the flow rate measuring means 2 and a fixed time (20 to 20) from this earliest time point.
Data of about 0 seconds) is stored, and the processing is performed on the time-series data of such a predetermined period. When the flow rate change is equal to or more than a predetermined value (A or more),
It is determined that the change in the flow rate is recognized (it is determined that the flow rate at the time of occurrence is generated) (step 3). If no change is observed from this data, repeat the flow rate measurement. on the other hand,
If a change in the flow rate is recognized, the slow ignition pattern recognition means 4 makes a conformity determination (step 4), and if it is a slow ignition pattern, the safety continuation cutoff time is extended (step 5), and the safety continuation is continued. A judgment is made based on the cutoff time (step 6). On the other hand, if it is determined in the conformity determination that the slow ignition pattern is not conformed, the shutoff operation is performed through the generation of the leak signal (step 7).
【００１８】このような操作をおこなう場合の、緩点火
の認識について、緩点火パターン認識手段４の構成を中
心に、以下、説明する。 ３ 緩点火パターン認識手段４ 緩点火の場合のガス流量パターンは、図２、図３または
図４に示すように、点火直後約０．３〜１０秒間のガス
流量が機器の定格ガス流量の約４０〜９０％の一定範囲
内に維持されながら極大、極小または定常となり、その
後定格ガス流量もしくは使用条件に応じた所要の値に向
かって変化する。一方、これに対し漏洩発生時は、図５
に示すように、ガス流量が瞬時に上昇し以後一定流量を
示すものが多く、緩点火と同様の流量パターンは基本的
に出現しない。従って、機器の緩点火により立上がり後
約１０秒以内に出現する固有の流量パターンの有無に着
目することにより、フローチャート図１３、図１４に示
すように、機器と漏洩を従来方法に比べ極めて早期にか
つ確実に判断することができる。The recognition of slow ignition in the case of performing such an operation will be described below, focusing on the configuration of the slow ignition pattern recognition means 4. 3 Slow ignition pattern recognition means 4 As shown in FIG. 2, FIG. 3 or FIG. 4, the gas flow rate pattern in the case of slow ignition is that the gas flow rate of about 0.3 to 10 seconds immediately after ignition is about the rated gas flow rate of the equipment. The maximum value, the minimum value, or the steady value is maintained while being maintained within a certain range of 40 to 90%, and then the value changes toward a required value according to the rated gas flow rate or the usage condition. On the other hand, when a leak occurs,
As shown in (4), the gas flow rate increases instantly and then shows a constant flow rate in many cases, and the flow rate pattern similar to the slow ignition basically does not appear. Therefore, by paying attention to the existence or nonexistence of a unique flow rate pattern that appears within about 10 seconds after the start-up due to the slow ignition of the device, as shown in the flowcharts in FIG. 13 and FIG. And it is possible to make a reliable judgment.
【００１９】即ち、緩点火パターン認識手段４は、流量
パターン指標演算手段３から出力される監視流量パター
ン指標の正常点火判断基準指標に対する適合判断をおこ
なうことにより、機器立上がり後約１０秒程度の極めて
早期に、ガス漏れの有無を判別し、漏洩と判断した場合
に漏れ信号を生成・出力する。ここで緩点火パターンに
対応する正常点火判断基準指標は、図１０、図１１また
は図１２、及び表１（図２３）に示すような、流量変化
発生時（Ｙ０）後、初めて極大または定常となる時の経
過時間対応値（Ｐ１、Ｐ２）、これらの時の流量対応値
（Ｑ１、Ｑ２，但し流量変化前の流量を基準とする）、
さらにその後初めて極小または増加開始となる時の経過
時間対応値（Ｐ３、Ｐ４、Ｐ５）、これらの時の流量対
応値（Ｑ３、Ｑ４、Ｑ５、但し流量変化前の流量を基準
とする）及び流量変化の傾向（増加、変化無し、減少）
を構成要素とする明示的、簡略化された指標である。こ
の流量変化の傾向の判断指標は、後に示す適合判断の判
断フロー内に「判断基準」として組み込まれている。That is, the slow ignition pattern recognition means 4 determines whether the monitored flow rate pattern index output from the flow rate pattern index calculation means 3 conforms to the normal ignition determination reference index. Whether or not there is a gas leak is determined at an early stage, and if a leak is determined, a leak signal is generated and output. Here, the normal ignition judgment reference index corresponding to the slow ignition pattern is, as shown in FIG. 10, FIG. 11 or FIG. 12, and Table 1 (FIG. 23), the maximum or steady state for the first time after the occurrence of the flow rate change (Y0). Corresponding values of elapsed time (P1, P2), corresponding values of flow rate at these times (Q1, Q2, with reference to the flow rate before the change in flow rate),
Furthermore, the elapsed time corresponding values (P3, P4, P5) when the minimum or increase starts for the first time, the flow rate corresponding values (Q3, Q4, Q5, but based on the flow rate before the flow rate change) and the flow rate at these times. Trend of change (increase, no change, decrease)
Is an explicit and simplified index that has as a component. The determination index of the tendency of the flow rate change is incorporated as a “determination criterion” in the determination flow of the conformity determination described later.
【００２０】以下、図面とフローチャートの対応をとっ
て説明する。基本的には、適合判断は、図１３に示す構
成で十分であるが、機器と漏洩の判別をより一層確実に
するためには、例えば流れ図１４に示すような、ガス流
量が立上がり後初めて極大となった後の変動パターンに
ついての規定も含めた条件判定を用いてもよい。The correspondence between the drawings and the flow chart will be described below. Basically, the configuration shown in FIG. 13 is sufficient for the determination of conformity, but in order to make the determination of the device and the leakage even more reliable, for example, the maximum flow rate is reached only after the gas flow rate rises as shown in the flow chart 14, for example. It is also possible to use the condition determination that also includes the regulation of the variation pattern after.
【００２１】以下、正常点火判断基準指標について説明
する。 ３−１ 緩点火パターンの認識 １ この状況は、図１３、図１４に示すフローチャートの第
１段（Ｊ１）に対応し、図１０、図１２に示す流量の変
化状況に対応する。即ち、初期に流量変化が認められる
初期流量変化発生時点Ｙ０からの第１設定時間Ｐ１内
に、最初の流量減少傾向が現れる第１判断時点Ｙ１があ
り、第１判断時点Ｙ１直前の第１ａ判断流量Ｘ１ａが第
１設定流量Ｑ１と第２設定流量Ｑ２との間にある場合
（Ｑ１＜Ｘ１ａ＜Ｑ２）に、緩点火が発生している（適
合判断において適合すると判断する）と判断する。ここ
で、Ｑ１及びＱ２は定格ガス流量の約４０〜９０％以内
の値である。The normal ignition determination reference index will be described below. 3-1 Recognition of Slow Ignition Pattern 1 This situation corresponds to the first stage (J1) of the flowcharts shown in FIGS. 13 and 14, and corresponds to the flow rate change situation shown in FIGS. That is, there is a first determination time point Y1 in which the first tendency of decreasing the flow rate appears within the first set time P1 from the initial flow rate change occurrence time point Y0 at which the flow rate change is initially recognized, and the 1a determination immediately before the first determination time point Y1. When the flow rate X1a is between the first set flow rate Q1 and the second set flow rate Q2 (Q1 <X1a <Q2), it is determined that slow ignition is occurring (it is determined to be suitable in the compatibility determination). Here, Q1 and Q2 are values within about 40 to 90% of the rated gas flow rate.
【００２２】３−２ 緩点火パターンの認識 ２ この状況は、図１３の第２段（Ｊ２）、図１４に示すフ
ローチャートの第３段（Ｊ２）に対応し、図１１に示す
流量の変化状況に対応する。即ち、初期に流量変化が認
められる初期流量変化発生時点Ｙ０からの第２設定時間
Ｐ２内の第２判断時点Ｙ２において流量変化傾向が認め
られず（例えば、直前流量に対して±１％以内の流量変
化しか発生しない）、第２判断時点Ｙ２の第１ｂ判断流
量Ｘ１ｂが第１設定流量Ｑ１と第２設定流量Ｑ２との間
にある場合（Ｑ１＜Ｘ１ｂ＜Ｑ２）にあり、且つ、第２
判断時点Ｙ２後の第３設定時間Ｐ３内にある第３判断時
点Ｙ３において流量増加傾向が認められる場合に、緩点
火が発生している（適合判断において適合すると判断す
る）と判断する。3-2 Recognition of Slow Ignition Pattern 2 This situation corresponds to the second stage (J2) of FIG. 13 and the third stage (J2) of the flow chart shown in FIG. 14, and the flow rate change state shown in FIG. Corresponding to. That is, the flow rate change tendency is not recognized at the second determination time point Y2 within the second set time P2 from the initial flow rate change occurrence time point Y0 where the flow rate change is initially recognized (for example, within ± 1% of the immediately preceding flow rate). If only the 1b determination flow rate X1b at the second determination time Y2 is between the first set flow rate Q1 and the second set flow rate Q2 (Q1 <X1b <Q2), and
When the tendency of increasing the flow rate is observed at the third determination time point Y3 within the third set time P3 after the determination time point Y2, it is determined that the slow ignition is occurring (it is determined to be suitable in the compatibility determination).
【００２３】３−３ 緩点火パターンの認識 ３ この状況は、図１４に示すフローチャートの第１、２段
（Ｊ１、Ｊ３）に対応し、図１０に示す流量の変化状況
に対応する。初期に流量変化が認められる初期流量変化
発生時点Ｙ０からの第１設定時間Ｐ１内に、最初の流量
減少傾向が現れる第１判断時点Ｙ１があり、第１判断時
点Ｙ１直前の第１ａ判断流量Ｘ１ａが第１設定流量Ｑ１
と第２設定流量Ｑ２との間にある場合（Ｑ１＜Ｘ１ａ＜
Ｑ２）において、第１判断時点Ｙ１から第４設定時間Ｐ
４経過までの第４判断時点Ｙ４で流量増加傾向が認めら
れ、且つ前記第１判断時点Ｙ１と第４判断時点Ｙ４との
流量差である第２判断流量Ｘ２が前記第３設定流量Ｑ３
と第４設定流量Ｑ４との間にある場合（Ｑ３＜Ｘ２＜Ｑ
４）に、緩点火が発生している（適合判断において適合
すると判断する）と判断する。3-3 Recognition of Slow Ignition Pattern 3 This situation corresponds to the first and second stages (J1, J3) of the flow chart shown in FIG. 14, and corresponds to the flow rate change situation shown in FIG. Within the first set time P1 from the initial flow rate change occurrence time point Y0 at which the initial flow rate change is recognized, there is a first determination time point Y1 at which the first tendency of decrease in flow rate appears, and the 1a determination flow rate X1a immediately before the first determination time point Y1. Is the first set flow rate Q1
And between the second set flow rate Q2 (Q1 <X1a <
In Q2), from the first determination time point Y1 to the fourth set time P
The flow rate increase tendency is recognized at the fourth determination time point Y4 until the lapse of four times, and the second determination flow rate X2, which is the flow rate difference between the first determination time point Y1 and the fourth determination time point Y4, is the third set flow rate Q3.
And between the fourth set flow rate Q4 (Q3 <X2 <Q
In 4), it is determined that slow ignition is occurring (it is determined that the ignition is suitable in the compatibility determination).
【００２４】３−４ 緩点火パターンの認識 ４ この状況は、図１４に示すフローチャートの第１、２段
（Ｊ１、Ｊ３）に対応し、図１２に示す流量の変化状況
に対応する。初期に流量変化が認められる初期流量変化
発生時点Ｙ０からの第１設定時間Ｐ１内に、最初の流量
減少傾向が現れる第１判断時点Ｙ１があり、第１判断時
点Ｙ１直前の第１ａ判断流量Ｘ１ａが第１設定流量Ｑ１
と第２設定流量Ｑ２との間にある場合（Ｑ１＜Ｘ１ａ＜
Ｑ２）において、第１判断時点Ｙ１から第５設定時間Ｐ
５経過以上の第５判断時点Ｙ５で流量減少傾向が認めら
れ、且つ前記第１判断時点Ｙ１と第５判断時点Ｙ５との
流量差である第３判断流量Ｘ３が前記第５設定流量Ｑ５
より大きい場合（Ｑ５＜Ｘ３）に、緩点火が発生してい
る（適合判断において適合すると判断する）と判断す
る。3-4 Recognition of Slow Ignition Pattern 4 This situation corresponds to the first and second stages (J1, J3) of the flow chart shown in FIG. 14, and corresponds to the flow rate change situation shown in FIG. Within the first set time P1 from the initial flow rate change occurrence time point Y0 at which the initial flow rate change is recognized, there is a first determination time point Y1 at which the first tendency of decrease in flow rate appears, and the 1a determination flow rate X1a immediately before the first determination time point Y1. Is the first set flow rate Q1
And between the second set flow rate Q2 (Q1 <X1a <
In Q2), from the first determination time point Y1 to the fifth set time P
A flow rate decrease tendency is recognized at the fifth determination time point Y5 of 5 or more, and the third determination flow rate X3, which is the flow rate difference between the first determination time point Y1 and the fifth determination time point Y5, is the fifth set flow rate Q5.
When it is larger (Q5 <X3), it is determined that slow ignition is occurring (it is determined to be suitable in the compatibility determination).
【００２５】図１４において、第２段（Ｊ３）内の判断
にあたっては、先に緩点火パターン３−３、３−４で分
類して説明したように、パターン認識は、文言「また
は」の前後で二つの別種に別れ、これらが選択的に適応
される。このようにして、発生した流量に関して、予め
設定された正常点火判断基準指標と適合判断し、適合し
ない場合に、漏洩が発生していると判断して、従来の確
率的な判別方法よりも確実に機器と漏洩が判別できる。In the judgment within the second stage (J3) in FIG. 14, the pattern recognition is performed before and after the word "or" as described earlier by classifying the slow ignition patterns 3-3 and 3-4. It is divided into two different species, and these are selectively applied. In this way, the generated flow rate is judged to be compatible with the preset normal ignition judgment reference index, and if it does not match, it is judged that leakage has occurred and it is more reliable than the conventional stochastic judgment method. The device and the leak can be distinguished.
【００２６】これまで説明してきたものにあっては、緩
点火を監視対象としたが、この内容に加えて、緩点火後
の比例制御を監視対象とすることもできる。この場合の
例を、図９に基づいて説明する。この図は、図６に対応
するものであり、緩点火、比例制御及び流量継続時間を
監視対象とする遮断操作スキームを示している。図示す
るように、図６に比較して、自動制御パターン（比例制
御パターン）の識別ステップ（ステップ８）が加わって
いる。先に説明した、緩点火パターンの識別説明と同様
に、自動制御パターン識別手段５の構成を中心に、これ
を説明する。 ４ 自動制御パターン認識手段５ この制御が問題となる、例えば、自動温度制御とは、空
調機や給湯器などのガス機器において、室温または水温
を設定温度で安定化させるため、比例制御などの制御方
式により点火後のガス流量を自動的に制御するものであ
り、図７に示すように、流量が数秒〜数十秒単位で継続
的に増加または減少する固有のガス流量パターンを呈す
る。一方、漏洩時のガス流量は、図８に示すように、基
本的に一定であり、自動温度制御と同様の変動パターン
は出現しない。従って、機器の自動温度制御による継続
的な流量変動パターンの有無に着目することにより、フ
ローチャート図９に示すように、緩点火パターンの認識
と合わせて、機器と漏洩をより一層確実に判断できる。
自動制御パターン認識手段５は、流量パターン指標演算
手段３から出力される監視流量パターン指標の比例制御
対応の正常使用判断基準指標に対する適合判断をおこな
うことにより、自動制御パターンの認識の有無を判別
し、漏洩と判断した場合に漏れ信号を生成・出力する。
ここで正常使用判断基準指標は、図１５または図１６、
及び表２（図２４）に示すように、ガス流量発生後の所
定の変動継続時間の範囲（ｔ１〜ｔ２）に於ける流量変
動幅対応値Ｊ及び、単調変化の時間対応値Ｌ．単調変化
の流量対応値Ｍにより構成されている明示的な指標であ
る。ここで、Ｊ、Ｌ、Ｍは０より大きい値である。In the above description, the slow ignition is monitored, but in addition to this content, the proportional control after the slow ignition can also be monitored. An example of this case will be described with reference to FIG. This figure corresponds to FIG. 6 and shows a shutoff operation scheme in which slow ignition, proportional control, and flow duration are monitored. As shown in the figure, as compared with FIG. 6, an automatic control pattern (proportional control pattern) identification step (step 8) is added. Similar to the description of identifying the slow ignition pattern described above, the configuration of the automatic control pattern identifying means 5 will be mainly described. 4 Automatic control pattern recognition means 5 This control is a problem, for example, automatic temperature control is a control such as proportional control to stabilize room temperature or water temperature at a set temperature in a gas appliance such as an air conditioner or a water heater. The gas flow rate after ignition is automatically controlled by the method, and as shown in FIG. 7, the gas flow rate exhibits a unique gas flow rate pattern that continuously increases or decreases in units of several seconds to several tens of seconds. On the other hand, the gas flow rate at the time of leakage is basically constant as shown in FIG. 8, and the same variation pattern as in the automatic temperature control does not appear. Therefore, by paying attention to the presence / absence of the continuous flow rate fluctuation pattern due to the automatic temperature control of the device, as shown in the flowchart of FIG. 9, the device and the leakage can be more surely determined together with the recognition of the slow ignition pattern.
The automatic control pattern recognition means 5 determines whether or not the automatic control pattern is recognized by determining whether the monitored flow rate pattern index output from the flow rate pattern index calculation means 3 is compatible with a normal use determination reference index corresponding to proportional control. , If a leak is determined, a leak signal is generated and output.
Here, the normal use judgment standard index is shown in FIG. 15 or FIG.
As shown in Table 2 (FIG. 24), the flow rate fluctuation width corresponding value J and the monotonous change time corresponding value L.L in the predetermined fluctuation continuation time range (t1 to t2) after the gas flow rate is generated. It is an explicit index composed of a monotonically changing flow rate corresponding value M. Here, J, L, and M are values greater than 0.
【００２７】この手段５においては、以下に説明される
指標に適合した場合に、比例制御パターンにあると判断
する。 ４−１ 比例制御パターン認識 １ この状況は、図１７に示すフローチャートに対応し、図
１５に示す流量の変化状況に対応する。流量変化が認め
られる初期流量変化発生時点Ｙ０からの第１設定期間
（ｔ１〜ｔ２）内における、最大流量値Ｑｍａｘと最小
流量値Ｑｍｉｎとの差Ｘ４が、比例第１設定流量Ｊより
も大きい場合（Ｊ＜Ｘ４）に、比例制御状態にあると判
断する。In this means 5, when the index described below is met, it is judged to be in the proportional control pattern. 4-1 Proportional Control Pattern Recognition 1 This situation corresponds to the flow chart shown in FIG. 17 and corresponds to the flow rate change situation shown in FIG. When the difference X4 between the maximum flow rate value Qmax and the minimum flow rate value Qmin within the first set period (t1 to t2) from the initial flow rate change occurrence time point Y0 where the flow rate change is recognized is larger than the proportional first set flow rate J. When (J <X4), it is determined that the proportional control state is set.
【００２８】４−２ 比例制御パターン認識 ２ この状況は、図１８に示すフローチャートに対応し、図
１６に示す流量の変化状況に対応する。直前データとの
流量差が±１％以上である、単調な増加または減少が、
第２設定期間Ｌ以上のＹ６（Ｌ＜Ｙ６）の間継続し、そ
の間の流量変化Ｘ５が、比例第２設定流量Ｍ以上である
場合（Ｍ＜Ｘ５）、比例制御状態にあると判断する。な
お、上記緩点火パターン及び自動制御パターンを、流量
発生後の経過時間の代わりに累積流量を用いて規定し、
流量測定手段１からの信号を基に累積流量を算出して判
定に用いてもよい。4-2 Proportional Control Pattern Recognition 2 This situation corresponds to the flow chart shown in FIG. 18, and corresponds to the flow rate change situation shown in FIG. A monotonous increase or decrease with a flow rate difference of ± 1% or more from the immediately preceding data,
It continues for Y6 (L <Y6) of the second setting period L or more, and when the flow rate change X5 during that time is the proportional second setting flow rate M or more (M <X5), it is determined to be in the proportional control state. The slow ignition pattern and the automatic control pattern are defined by using the cumulative flow rate instead of the elapsed time after the flow rate is generated,
The cumulative flow rate may be calculated based on the signal from the flow rate measuring means 1 and used for the determination.
【００２９】さらに、これまで説明したきたように、本
願には、安全継続時間超過判別手段１０２が設けられて
いる。以下これについて説明する。 ５ 安全継続時間超過判別手段１０２ この手段は、監視時系列流量信号データから、流量変化
の発生時を確認する流量変化時点確認手段１００と、こ
の流量変化時点確認手段１００によって確認される発生
時から、対応する発生時流量の継続時間を検出する継続
時間検出手段１０１とともに働いて、継続時間検出手段
１０１によって検出される継続時間が予め設定された安
全継続遮断時間を超える場合に、漏れ信号を生成する。Further, as described above, the present application is provided with the safety continuation time excess determining means 102. This will be described below. 5 Safety Continuity Time Exceeding Discrimination Means 102 From the monitoring time-series flow rate signal data, the flow rate change time confirmation means 100 for confirming the occurrence time of the flow rate change and the occurrence time confirmed by the flow rate change time confirmation means 100 , A leak signal is generated when working with the duration detecting means 101 for detecting the duration of the corresponding occurrence flow rate, and when the duration detected by the duration detecting means 101 exceeds a preset safe continuation interruption time. To do.
【００３０】この機能を図面に基づいて説明すると、図
２０に示されるように、監視時系列流量信号データが変
化する場合にあっては、各流量変化が増加状態で段階的
に発生する機器点火時と、減少状態で段階的に発生する
機器停止時との関係より、変化流量が同一となる機器点
火時（発生時）と機器停止時（消滅時）の対応を取っ
て、これらの間の時間間隔が、余りに長くなる場合（安
全継続遮断時間を超える場合）は、遮断が必要なガス漏
れが発生しているものと判断して、漏れ信号を発生す
る。図２０（図２２でも同じ）において、内部登録は、
監視の対象となる発生時流量、夫々を示している。さら
に、図２０及び図２２に示すテイブルは、流量の変化に
応じて、夫々の発生時流量に対して監視の為に形成され
るテイブルを示している。図２１は、発生時流量と、こ
の発生時流量に対する継続時間の関係を示しており、実
線（もしくは破線）以下の領域にあっては遮断が必要な
状態とは判断されず、これらの以上の長時間に渡って発
生時流量が維持されている場合に漏れ信号が生成され
る。例えば、図２２に示す例にあっては、発生時流量
は、風呂釜に対応する１．２ｍ3／ｈであって、１００
分弱の継続的な使用状態があって始めてガス漏れと判断
され、ガス遮断操作が行われる。ここで、先にも説明し
たように、緩点火パターン認識手段４により緩点火が確
認された段階、さらに、自動制御パターン認識手段５に
よる比例制御パターンの確認された段階で、安全継続遮
断時間を使用実態に応じて延長することにより、機器使
用中に従来の安全継続遮断機能により遮断される誤遮断
を低減もする構成とされている。図２１に於ける実線
は、初期の設定時間であり、破線が延長された時間であ
る。This function will be described with reference to the drawings. As shown in FIG. 20, when the monitoring time-series flow rate signal data changes, the equipment ignition is generated stepwise with each flow rate change increasing. From the relationship between the time and the equipment stoppage that occurs stepwise in the decreasing state, the correspondence between the equipment ignition time (generation time) and the equipment stoppage time (disappearance) when the flow rate changes is the same, If the time interval becomes too long (exceeds the safety continuous shutoff time), it is determined that a gas leak that requires shutoff has occurred, and a leak signal is generated. In FIG. 20 (same for FIG. 22), internal registration is
The flow rate at the time of occurrence, which is the target of monitoring, is shown. Further, the tables shown in FIGS. 20 and 22 show the tables formed for monitoring the respective flow rates at the time of occurrence according to the change in the flow rate. FIG. 21 shows the relationship between the flow rate at the time of occurrence and the continuation time for the flow rate at the time of occurrence. In the region below the solid line (or broken line), it is not determined that the shutoff is necessary, and the above A leak signal is generated when the as-generated flow is maintained for a long time. For example, in the example shown in FIG. 22, the flow rate at the time of generation is 1.2 m 3 / h corresponding to the bath kettle and is 100
Only when there is a slight continuous use condition, it is judged that there is a gas leak, and the gas shutoff operation is performed. Here, as described above, the safe continuous cutoff time is set at the stage where the slow ignition is confirmed by the slow ignition pattern recognition unit 4 and at the stage where the proportional control pattern is confirmed by the automatic control pattern recognition unit 5. By extending according to the actual usage, it is configured to reduce the false cutoff caused by the conventional continuous safety cutoff function while the device is in use. The solid line in FIG. 21 is the initial set time, and the broken line is the extended time.
【００３１】〔効果〕本発明により、ガス漏洩を従来方
法に比べ極めて早期にかつ確実に認識し遮断することに
より、ガスの安全性を向上する効果を奏する。本発明の
緩点火ターン認識手段及び自動制御パターン認識手段に
おける緩点火パターン及び自動制御パターンは一般的な
ガス機器に広く対応して事前に規定できるため、実使用
前の学習過程が不要であり学習に要する期間と手間を省
くことができる。また新規に導入した機器の使用時にも
誤遮断が発生し難い。本発明における判別方法は、流量
監視時間が、実質上、数十秒以内と短く演算及び判定基
準が複雑でないため、従来メーターに搭載されているよ
うな小容量メモリと低速ＣＰＵで運用することが可能で
ある。[Effect] According to the present invention, gas leakage can be improved by recognizing and shutting off gas leakage extremely early and surely as compared with the conventional method. Since the slow ignition pattern and the automatic control pattern in the slow ignition turn recognizing means and the automatic control pattern recognizing means of the present invention can be defined in advance corresponding to a wide range of general gas appliances, a learning process before actual use is unnecessary and learning is possible. It is possible to save the time and effort required for. In addition, it is unlikely that a false cutoff will occur when using a newly introduced device. Since the flow rate monitoring time is practically short within a few tens of seconds and the calculation and determination criteria are not complicated, the determination method according to the present invention can be operated with a small-capacity memory and a low-speed CPU that are conventionally mounted in a meter. It is possible.
【図１】ガス遮断装置のブロック構成を示す図FIG. 1 is a diagram showing a block configuration of a gas shutoff device.
【図２】緩点火に於ける流量パターンの一例を示す図FIG. 2 is a diagram showing an example of a flow rate pattern in slow ignition.
【図３】緩点火に於ける流量パターンの一例を示す図FIG. 3 is a diagram showing an example of a flow rate pattern in slow ignition.
【図４】緩点火に於ける流量パターンの一例を示す図FIG. 4 is a diagram showing an example of a flow rate pattern in slow ignition.
【図５】漏れが発生している場合の流量パターンを示す
図FIG. 5 is a diagram showing a flow rate pattern when a leak has occurred.
【図６】緩点火及び流量継続時間を監視対象とする遮断
操作スキームを示す図FIG. 6 is a diagram showing a shutoff operation scheme in which slow ignition and flow duration are monitored.
【図７】比例制御を行っている場合の流量パターンの一
例を示す図FIG. 7 is a diagram showing an example of a flow rate pattern when performing proportional control.
【図８】漏れが発生している場合の流量パターンを示す
図FIG. 8 is a diagram showing a flow rate pattern when a leak has occurred.
【図９】緩点火、比例制御及び流量継続時間を監視対象
とする遮断操作スキームを示す図FIG. 9 is a diagram showing a shutoff operation scheme in which slow ignition, proportional control, and flow duration are monitored.
【図１０】図２に対応する正常点火判断基準指標の説明
図10 is an explanatory diagram of a normal ignition determination reference index corresponding to FIG.
【図１１】図３に対応する正常点火判断基準指標の説明
図11 is an explanatory diagram of a normal ignition determination reference index corresponding to FIG.
【図１２】図４に対応する正常点火判断基準指標の説明
図12 is an explanatory diagram of a normal ignition determination reference index corresponding to FIG.
【図１３】緩点火に於ける流量パターンの適合判断のフ
ローチャートFIG. 13 is a flowchart for determining whether or not to match the flow rate pattern in slow ignition.
【図１４】緩点火に於ける流量パターンの適合判断のフ
ローチャートの別実施形態FIG. 14 is another embodiment of a flowchart for determining whether or not to match the flow rate pattern in slow ignition.
【図１５】比例制御対応の正常使用判断基準指標の説明
図FIG. 15 is an explanatory diagram of a normal use determination standard index corresponding to proportional control.
【図１６】比例制御対応の正常使用判断基準指標の別実
施形態の説明図FIG. 16 is an explanatory diagram of another embodiment of a normal use determination standard index corresponding to proportional control.
【図１７】比例制御に於ける流量パターンの適合判断の
フローチャートFIG. 17 is a flow chart of flow pattern conformity determination in proportional control.
【図１８】比例制御に於ける流量パターンの適合判断の
フローチャートの別実施形態FIG. 18 is another embodiment of a flow chart of flow pattern conformity determination in proportional control.
【図１９】ガスメータとガス機器の連結状態を示す図FIG. 19 is a diagram showing a connected state of a gas meter and a gas device.
【図２０】流量継続時間を監視対象とする適性使用状態
の説明図FIG. 20 is an explanatory diagram of an appropriate usage state in which the flow duration is monitored.
【図２１】発生時流量と安全継続遮断時間の関係を示す
図FIG. 21 is a diagram showing the relationship between the flow rate at the time of occurrence and the safety continuous interruption time.
【図２２】流量継続時間を監視対象とする遮断操作の説
明図FIG. 22 is an explanatory diagram of a shutoff operation in which the flow duration is monitored.
【図２３】緩点火対応の指標表を示す図表FIG. 23 is a diagram showing an index table for slow ignition.
【図２４】比例制御対応の指標表を示す図表FIG. 24 is a diagram showing an index table for proportional control.
２ 流量測定手段 ３ 流量パターン指標演算手段 ４ 緩点火パターン認識手段 ５ 自動制御パターン認識手段 ６ 遮断手段 ７ 記憶手段 2 flow rate measurement means 3 flow rate pattern index calculation means 4 slow ignition pattern recognition means 5 automatic control pattern recognition means 6 shutoff means 7 storage means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加賀城 俊正 大阪府大阪市中央区平野町四丁目１番２号 大阪瓦斯株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toshinoma Kagajo 1-2-2 Hiranocho, Chuo-ku, Osaka-shi, Osaka Prefecture Osaka Gas Co., Ltd.
Claims (9)
タを通過するガス量に応じて信号を発する流量測定手段
と、前記流量測定手段から得られる監視時系列流量信号
データに基づいて、前記ガス供給ラインに於ける漏れ信
号を生成する漏れ信号生成手段を備えたガス漏れ判断装
置であって、 前記流量測定手段が、０．５秒以下の時間分解能を有し
前記ガス供給ラインの下手側に備えられるガス機器が正
常点火される場合に認められる、前記時間分解能より高
い時間分解能で計測された正常点火流量パターンに基づ
いて予め設定される正常点火判断基準指標を記憶した記
憶手段を備え、 前記監視時系列流量信号データに基づいて求まる監視流
量パターン指標の前記正常点火判断基準指標に対する適
合判断を行い、適合しない場合に、前記漏れ信号を生成
する第１漏れ信号生成手段を備えたガス漏れ判断装置。1. The gas supply based on flow rate measuring means for emitting a signal according to the amount of gas passing through a gas meter installed in a gas supply line, and monitoring time series flow rate signal data obtained from the flow rate measuring means. A gas leak determination device comprising a leak signal generating means for generating a leak signal in a line, wherein the flow rate measuring means has a time resolution of 0.5 seconds or less and is provided on the lower side of the gas supply line. A normal ignition determination reference index preset based on a normal ignition flow rate pattern measured at a time resolution higher than the time resolution, which is recognized when the gas equipment is normally ignited, and the monitoring The monitoring flow pattern index determined based on the time-series flow rate signal data is determined to be compatible with the normal ignition determination reference index, and if the index does not match, the leakage is determined. Gas leakage determination device having a first leakage signal generating means for generating a degree.
タを通過するガス量に応じて信号を発する流量測定手段
と、前記流量測定手段から得られる監視時系列流量信号
データに基づいて、前記ガス供給ラインに於ける漏れ信
号を生成する漏れ信号生成手段を備えたガス漏れ判断装
置であって、 前記ガス供給ラインの下手側に備えられるガス機器が正
常点火される場合に、認められる正常点火流量パターン
に基づいて予め設定され、所定流量以上の流量変化が認
められる流量変化発生時からの経過時間、流量、流量変
化の傾向からなる正常点火判断基準指標を記憶した記憶
手段を備え、 前記監視時系列流量信号データに基づいて、流量変化発
生時、前記流量変化発生時からの経過時間、流量及び、
流量変化の傾向からなる監視流量パターン指標を演算す
る流量パターン指標演算手段を備え、 前記流量パターン指標演算手段により得れる前記監視流
量パターン指標が、前記正常点火判断基準指標に適合す
るかどうかの適合判断をおこない、適合しない場合に、
前記漏れ信号を生成する第１漏れ信号生成手段を備えた
ガス漏れ判断装置。2. The gas supply based on flow rate measuring means for emitting a signal according to the amount of gas passing through a gas meter installed in a gas supply line, and monitoring time-series flow rate signal data obtained from the flow rate measuring means. A gas leak determination device having a leak signal generation means for generating a leak signal in a line, wherein a normal ignition flow rate pattern is recognized when a gas device provided on the lower side of the gas supply line is normally ignited. Preset based on the above, the flow rate change is observed more than a predetermined flow rate elapsed time, the flow rate, a storage means for storing a normal ignition determination reference index consisting of the tendency of the flow rate change, the monitoring time series Based on the flow rate signal data, when a flow rate change occurs, the elapsed time from the flow rate change occurrence, the flow rate, and
Adaptation of whether or not the monitored flow rate pattern index obtained by the flow rate pattern index calculation means conforms to the normal ignition determination reference index, which comprises a flow rate pattern index calculation means for calculating a monitored flow rate pattern index composed of a tendency of flow rate change. Make a judgment and if it does not match,
A gas leak determination device comprising first leak signal generation means for generating the leak signal.
ガス機器が緩点火される場合に対応する緩点火対応の正
常点火判断基準指標を備えた請求項２記載のガス漏れ判
断装置。3. The gas leakage determination device according to claim 2, further comprising, as the normal ignition determination reference index, a normal ignition determination reference index corresponding to slow ignition corresponding to the case where the gas equipment is slowly ignited.
からの第１設定時間Ｐ１内に、最初の流量減少傾向が現
れる第１判断時点Ｙ１があり、 前記第１判断時点Ｙ１直前の第１ａ判断流量Ｘ１ａが第
１設定流量Ｑ１と第２設定流量Ｑ２との間にある場合
（Ｑ１＜Ｘ１ａ＜Ｑ２）に、 適合すると判断する請求項３記載のガス漏れ判断装置。4. An initial flow rate change occurrence point Y0 at which a flow rate change is initially recognized when the conformity determination is performed.
There is a first determination time point Y1 in which the first tendency of decreasing the flow rate appears within the first setting time period P1 from 1 to 3, and the 1a determination flow rate X1a immediately before the first determination time point Y1 is the first setting flow rate Q1 and the second setting flow rate Q2. The gas leakage determination device according to claim 3, wherein the gas leakage determination device determines that it is suitable when it is between (Q1 <X1a <Q2).
からの第２設定時間Ｐ２内の第２判断時点Ｙ２において
流量変化傾向が認められず、 前記第２判断時点Ｙ２の第１ｂ判断流量Ｘ１ｂが前記第
１設定流量Ｑ１と第２設定流量Ｑ２との間にある場合
（Ｑ１＜Ｘ１ｂ＜Ｑ２）にあり、且つ、 前記第２判断時点Ｙ２後の第３設定時間Ｐ３内にある第
３判断時点Ｙ３において流量増加傾向が認められる場合
に、 適合すると判断する請求項３記載のガス漏れ判断装置。5. An initial flow rate change occurrence point Y0 at which a flow rate change is initially recognized when the conformity determination is performed.
At the second determination time Y2 within the second set time P2, the tendency of the flow rate change is not recognized, and the 1b determination flow rate X1b at the second determination time Y2 is the same as the first set flow rate Q1 and the second set flow rate Q2. If it is between (Q1 <X1b <Q2), and if there is a tendency to increase the flow rate at the third determination time point Y3 that is within the third set time P3 after the second determination time point Y2, it is determined to be suitable. The gas leakage determination device according to claim 3.
からの第１設定時間Ｐ１内に、最初の流量減少傾向が現
れる第１判断時点Ｙ１があり、 前記第１判断時点Ｙ１直前の第１ａ判断流量Ｘ１ａが第
１設定流量Ｑ１と第２設定流量Ｑ２との間にある場合
（Ｑ１＜Ｘ１ａ＜Ｑ２）において、 前記第１判断時点Ｙ１から第４設定時間Ｐ４経過までの
第４判断時点Ｙ４で流量増加傾向が認められ、且つ前記
第１判断時点Ｙ１と第４判断時点Ｙ４との流量差である
第２判断流量Ｘ２が第３設定流量Ｑ３と第４設定流量Ｑ
４との間にある場合（Ｑ３＜Ｘ２＜Ｑ４）に、 適合すると判断する請求項３記載のガス漏れ判断装置。6. An initial flow rate change occurrence point Y0 at which a flow rate change is initially recognized when the conformity determination is performed.
There is a first determination time point Y1 in which the first tendency of decreasing the flow rate appears within the first setting time period P1 from 1 to 3, and the 1a determination flow rate X1a immediately before the first determination time point Y1 is the first setting flow rate Q1 and the second setting flow rate Q2. And (Q1 <X1a <Q2), the tendency of increasing the flow rate is recognized at the fourth determination time point Y4 from the first determination time point Y1 to the elapse of the fourth set time P4, and the first determination time point Y1. The second determination flow rate X2, which is the flow rate difference between the fourth determination time point Y4 and the fourth determination time point Y4,
4. The gas leakage determination device according to claim 3, wherein when it is between 4 and 4 (Q3 <X2 <Q4), it is determined to be suitable.
からの第１設定時間Ｐ１内に、最初の流量減少傾向が現
れる第１判断時点Ｙ１があり、 前記第１判断時点Ｙ１直前の第１ａ判断流量Ｘ１ａが第
１設定流量Ｑ１と第２設定流量Ｑ２との間にある場合
（Ｑ１＜Ｘ１ａ＜Ｑ２）において、 前記第１判断時点Ｙ１から第５設定時間Ｐ５経過以上の
第５判断時点Ｙ５に到るまで連続して流量減少傾向が認
められ、且つ前記第１判断時点Ｙ１と第５判断時点Ｙ５
との流量差である第３判断流量Ｘ３が第５設定流量Ｑ５
より大きい場合（Ｑ５＜Ｘ３）に、 適合すると判断する請求項３記載のガス漏れ判断装置。7. An initial flow rate change occurrence point Y0 at which a flow rate change is initially recognized when the conformity determination is performed.
There is a first determination time point Y1 in which the first tendency of decreasing the flow rate appears within the first setting time period P1 from 1 to 3, and the 1a determination flow rate X1a immediately before the first determination time point Y1 is the first setting flow rate Q1 and the second setting flow rate Q2. And (Q1 <X1a <Q2), there is a tendency for the flow rate to decrease continuously from the first determination time point Y1 to the fifth determination time point Y5 which is longer than the fifth set time P5, and The first determination time point Y1 and the fifth determination time point Y5
The third judgment flow rate X3, which is the flow rate difference with
The gas leakage determination device according to claim 3, wherein if it is larger (Q5 <X3), it is determined to be suitable.
間分解能を有し、前記正常点火判断基準指標が、前記時
間分解能より高い時間分解能で取られたデータに基づく
請求項２〜７のいずれか１項に記載のガス漏れ判断装
置。8. The flow rate measuring means has a time resolution of 0.5 seconds or less, and the normal ignition determination reference index is based on data taken with a time resolution higher than the time resolution. The gas leak determination device according to any one of 1.
ス漏れ判断装置を備えるとともに、前記漏れ信号の生成
に応じてガスを遮断する遮断手段を備えたガス遮断装
置。9. A gas shutoff device comprising the gas leak determination device according to claim 1, and a shutoff means for shutting off gas in accordance with generation of the leak signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11891196A JP3633718B2 (en) | 1996-05-14 | 1996-05-14 | Gas leak judgment device and gas shut-off device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11891196A JP3633718B2 (en) | 1996-05-14 | 1996-05-14 | Gas leak judgment device and gas shut-off device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09304134A true JPH09304134A (en) | 1997-11-28 |
| JP3633718B2 JP3633718B2 (en) | 2005-03-30 |
Family
ID=14748229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11891196A Expired - Fee Related JP3633718B2 (en) | 1996-05-14 | 1996-05-14 | Gas leak judgment device and gas shut-off device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3633718B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000016044A1 (en) * | 1998-09-11 | 2000-03-23 | Matsushita Electric Industrial Co., Ltd. | System for distinguishing appliance |
| JP2001296163A (en) * | 2000-04-14 | 2001-10-26 | Matsushita Electric Ind Co Ltd | Gas safety device |
| JP2002174542A (en) * | 2000-12-06 | 2002-06-21 | Yazaki Corp | Gas burning appliance determining device and method thereof |
| JP2008185519A (en) * | 2007-01-31 | 2008-08-14 | Matsushita Electric Ind Co Ltd | Flow rate measuring device and fluid supply system using the same |
| JP2009030976A (en) * | 2007-07-24 | 2009-02-12 | Yazaki Corp | Gas meter |
| JP2010101679A (en) * | 2008-10-22 | 2010-05-06 | Panasonic Corp | Gas circuit breaker |
| JP2011027494A (en) * | 2009-07-23 | 2011-02-10 | Panasonic Corp | Gas flow rate calculation device, gas shut-off device, and gas flow rate calculation method |
| JP2012013370A (en) * | 2010-07-02 | 2012-01-19 | Yazaki Corp | Gas appliance discriminating system and gas appliance discriminating method |
| JP2012177707A (en) * | 2012-05-14 | 2012-09-13 | Yazaki Corp | Gas meter |
| JP2012181204A (en) * | 2012-05-14 | 2012-09-20 | Yazaki Corp | Gas meter |
| JP2012181205A (en) * | 2012-05-14 | 2012-09-20 | Yazaki Corp | Gas meter |
-
1996
- 1996-05-14 JP JP11891196A patent/JP3633718B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000016044A1 (en) * | 1998-09-11 | 2000-03-23 | Matsushita Electric Industrial Co., Ltd. | System for distinguishing appliance |
| CN100367007C (en) * | 1998-09-11 | 2008-02-06 | 松下电器产业株式会社 | System for distinguishing appliance |
| JP2001296163A (en) * | 2000-04-14 | 2001-10-26 | Matsushita Electric Ind Co Ltd | Gas safety device |
| JP2002174542A (en) * | 2000-12-06 | 2002-06-21 | Yazaki Corp | Gas burning appliance determining device and method thereof |
| JP2008185519A (en) * | 2007-01-31 | 2008-08-14 | Matsushita Electric Ind Co Ltd | Flow rate measuring device and fluid supply system using the same |
| JP2009030976A (en) * | 2007-07-24 | 2009-02-12 | Yazaki Corp | Gas meter |
| JP2010101679A (en) * | 2008-10-22 | 2010-05-06 | Panasonic Corp | Gas circuit breaker |
| JP2011027494A (en) * | 2009-07-23 | 2011-02-10 | Panasonic Corp | Gas flow rate calculation device, gas shut-off device, and gas flow rate calculation method |
| JP2012013370A (en) * | 2010-07-02 | 2012-01-19 | Yazaki Corp | Gas appliance discriminating system and gas appliance discriminating method |
| JP2012177707A (en) * | 2012-05-14 | 2012-09-13 | Yazaki Corp | Gas meter |
| JP2012181204A (en) * | 2012-05-14 | 2012-09-20 | Yazaki Corp | Gas meter |
| JP2012181205A (en) * | 2012-05-14 | 2012-09-20 | Yazaki Corp | Gas meter |
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| Publication number | Publication date |
|---|---|
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