JP2800376B2 - Gas meter with safety function - Google Patents
Gas meter with safety functionInfo
- Publication number
- JP2800376B2 JP2800376B2 JP2160508A JP16050890A JP2800376B2 JP 2800376 B2 JP2800376 B2 JP 2800376B2 JP 2160508 A JP2160508 A JP 2160508A JP 16050890 A JP16050890 A JP 16050890A JP 2800376 B2 JP2800376 B2 JP 2800376B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- flow rate
- pressure
- signal
- measuring
- 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
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Description
【発明の詳細な説明】 産業上の利用分野 本発明は、ガス供給側の異常を監視する機能を付加し
た安全機能付きガスメータに関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas meter with a safety function added with a function of monitoring an abnormality on a gas supply side.
従来の技術 近年、ガス漏れによる爆発事故や、ガス器具の消し忘
れによる火災事故等を防ぐために、ガスメータの中にガ
ス器具の使用時間を監視し、長時間にわたってガス器具
が使われ続けた場合、ガス器具の消し忘れであると判断
し、ガスの供給を遮断するガス遮断装置が組みこまれる
ようになってきている。In recent years, in order to prevent explosion accidents due to gas leaks and fire accidents due to forgetting to turn off gas appliances, the usage time of gas appliances is monitored in a gas meter, and if gas appliances continue to be used for a long time, Gas shut-off devices for shutting off gas supply have been incorporated as a result of the judgment that gas appliances have been forgotten to be turned off.
このような従来の安全機能付きガスメータの動作につ
いてその概要を第４図に従って説明する。The operation of such a conventional gas meter with a safety function will be outlined with reference to FIG.
第４図は従来の安全機能付きガスメータのブロック図
である。第４図において、１はLPガスボンベ、２は供給
圧を調整する調整器、３は１次側配管、４は２次側配
管、５は流量計測手段、６は計量器、７は安全判定手
段、８は報知手段、９はガス遮断手段であり遮断弁で構
成されている。10はガス器具である。11は安全機能付き
ガスメータである。FIG. 4 is a block diagram of a conventional gas meter with a safety function. In FIG. 4, 1 is an LP gas cylinder, 2 is a regulator for adjusting the supply pressure, 3 is a primary pipe, 4 is a secondary pipe, 5 is a flow rate measuring means, 6 is a measuring instrument, and 7 is a safety judging means. , 8 are notifying means, and 9 is a gas shutoff means, which is constituted by a shutoff valve. 10 is a gas appliance. 11 is a gas meter with a safety function.
以上のように構成された安全機能付きガスメータにつ
いてその動作を説明する。The operation of the gas meter with a safety function configured as described above will be described.
LPガスボンベ１から供給される高圧のガスは調整器２
により圧力が調整され280mmH2Oと低圧に変換されて１次
側配管３に供給される。流量計測手段５により２次側配
管４を流れる流量が計測される。流量計測手段５で測定
された流量値は計量器６により積算表示されると同時に
安全判定手段７によりガス器具10の使用状態や２次側配
管４からのガス漏洩をチェックし、危険な使用状態であ
ると判定される時にはガス遮断手段９を駆動してガスの
流れを遮断する。The high-pressure gas supplied from the LP gas cylinder 1 is the regulator 2
, The pressure is adjusted to 280 mmH 2 O and converted to a low pressure and supplied to the primary side pipe 3. The flow rate measuring means 5 measures the flow rate flowing through the secondary pipe 4. The flow rate value measured by the flow rate measuring means 5 is integrated and displayed by the measuring device 6, and at the same time, the safety judging means 7 checks the use condition of the gas appliance 10 and gas leakage from the secondary side pipe 4, and the dangerous use condition. When it is determined that the gas flow is equal to, the gas shut-off means 9 is driven to cut off the gas flow.
発明が解決しようとする課題 しかしながら上記のような構成では、２次側配管４か
らのガス漏洩及び２次側配管４につながるガス器具10の
異常使用を監視し安全管理を行うことはできるが１次側
配管３からのガス漏洩及びそれにつながる調整器２の異
常を監視することができないという課題を有していた。Problems to be Solved by the Invention However, in the above configuration, it is possible to monitor gas leakage from the secondary pipe 4 and abnormal use of the gas appliance 10 connected to the secondary pipe 4 to perform safety management. There is a problem that it is not possible to monitor gas leakage from the secondary pipe 3 and the abnormality of the regulator 2 which is connected thereto.
本発明は上記課題に鑑み、調整器２からガス器具10ま
での異常状態を監視できる安全機能付きガスメータを提
供するものである。The present invention has been made in view of the above problems, and provides a gas meter with a safety function capable of monitoring an abnormal state from the regulator 2 to the gas appliance 10.
課題を解決するための手段 上記課題を解決するために本発明の安全機能付きガス
メータは、ガスの使用量を計量する計量器と、ガスの流
れ状態を計測する流量計測手段と、前記流量計測手段か
らの信号によりガス使用状態を監視し危険な状態の時に
はガスを遮断する遮断手段と、前記遮断手段の前段に設
けたガス圧の変動を検出する圧力センサと、前記流量計
測手段からの信号と前記圧力センサからの信号の２つの
信号を入力とする演算手段と、前記演算手段からの信号
により報知を行う報知手段とで構成され、前記演算手段
は所定の期間にわたってガスの圧力変動周期と流量の関
係を測定し記憶する書き込み呼び出し可能な記憶回路
と、ある測定時間における圧力変動周期と流量との関係
と前記記憶回路に記憶されている圧力変動周期と流量と
の関係とを比較しある値以上の差がある時にはガス漏れ
を示す出力を生じる比較回路を備えたものである。Means for Solving the Problems In order to solve the above-mentioned problems, a gas meter with a safety function of the present invention includes a measuring device for measuring a gas usage amount, a flow measuring device for measuring a gas flow state, and the flow measuring device. A shut-off means for monitoring a gas use state by a signal from and shutting off a gas in a dangerous state, a pressure sensor provided at a stage preceding the shut-off means for detecting a change in gas pressure, and a signal from the flow rate measuring means. It is composed of arithmetic means for inputting two signals of the signal from the pressure sensor, and notifying means for performing notification by a signal from the arithmetic means, wherein the arithmetic means comprises a gas pressure fluctuation cycle and a flow rate over a predetermined period. A write-callable storage circuit that measures and stores the relationship between the pressure fluctuation cycle and the flow rate at a certain measurement time, and the pressure fluctuation cycle and the flow stored in the storage circuit. It is provided with a comparison circuit which compares the relationship with the quantity and produces an output indicating a gas leak when there is a difference exceeding a certain value.
作用 本発明は上記した構成によって調整器からガス器具ま
でのガス供給システム全体の安全管理を安全機能付きガ
スメータで行うことができることとなる。Operation According to the present invention, the safety management of the entire gas supply system from the regulator to the gas appliance can be performed by the gas meter with the safety function by the configuration described above.
実施例 以下本発明の一実施例の安全機能付きガスメータにつ
いて、図面を参照しながら説明する。Embodiment A gas meter with a safety function 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安全機能付きガスメ
ータのブロック図である。第１図において、１はLPガス
ボンベ、２は供給圧を調整する調整器、３は１次側配
管、４は２次側配管、５は流量計測手段、６は計量器、
７は安全判定手段、８は報知手段、９はガス遮断手段で
あり遮断弁で構成されている。10はガス器具、11は安全
機能付きガスメータ、12は圧力センサ、13は演算手段で
ある。なお従来例の第４図と同じ機能を示すブロックは
同一の番号を付与している。第４図の従来例との違いは
ガス遮断手段９と調整器２との間に圧力センサ12が設置
され、この圧力センサ12からの信号と流量計測手段５か
らの信号を入力として演算処理を行う演算手段13が追加
されていることである。FIG. 1 is a block diagram of a gas meter with a safety function according to an embodiment of the present invention. In FIG. 1, 1 is an LP gas cylinder, 2 is a regulator for adjusting the supply pressure, 3 is a primary pipe, 4 is a secondary pipe, 5 is a flow rate measuring means, 6 is a measuring instrument,
Reference numeral 7 denotes safety determination means, reference numeral 8 denotes notification means, and reference numeral 9 denotes gas shutoff means, which is constituted by a shutoff valve. Reference numeral 10 denotes a gas appliance, 11 denotes a gas meter with a safety function, 12 denotes a pressure sensor, and 13 denotes calculation means. Blocks having the same functions as those in FIG. 4 of the conventional example are given the same numbers. 4 is different from the prior art shown in FIG. 4 in that a pressure sensor 12 is provided between the gas shut-off means 9 and the regulator 2, and a signal from the pressure sensor 12 and a signal from the flow rate measuring means 5 are used as inputs to perform arithmetic processing. The operation means 13 for performing the operation is added.
以上のように構成された安全機能付きガスメータにつ
いて、以下第１図及び第２図を用いてその動作を説明す
る。第２図は本発明の第１図に示す調整器２の動作を説
明する図である。第２図ａは調整器２の構造を概念的に
説明するための構造図である。101は調整器の入口、102
はスプリング、103は弁体、104は調整器２の出口であ
る。LPガスボンベ１からのガス入力は調整器２の入口10
1に加わり、弁体103を押す。もし調整器２の出口104の
圧力が低く入口101側のガス圧との差がスプリング102の
力以上になると弁体103が押し下げられガスが入口101側
から出口104側に流れる。すると出口104側のガス圧力が
上昇し入口101側のガス圧との差が小さくなるためにス
プリング102の力により弁体103は持ち上がりガスの流れ
を遮断する。もし出口104側でガスの使用がなければ出
口104側のガスは管内に閉じ込められるため出口104側の
ガス圧は一定の圧力を保ち圧力は変動しない。そのため
弁体103は閉じた状態を保つ。一方出口104側でガスの使
用があると出口104側のガスが減って行くため出口104側
のガス圧が下がり始める。入口101側と出口104側のガス
圧の差がスプリング102の力以上になると再び弁体103は
押し下げられ入口101側から出口104側にガスが供給され
再び出口104側のガス圧が上昇する。第２図ｂに上記動
作のくり返しによって出口104側のガス圧のレベルが時
間によって変化する様子を示す。同図において実線は出
口104側で使用されるガス流量が小さい場合、点線は出
口104側で使用されるガス流量が大きい場合の例であ
る。時間t1において弁体103が開きガスを出口104側に供
給するため出口104側のガス圧が急激に上昇する。次に
時間t2において出口104側のガス圧があるレベルに達し
たため弁体103が閉じ出口104側へのガスの供給をストッ
プする。すると出口104側でガスが使用されているので
出口104側のガス圧が下がる様子を示している。レベル
ａは弁体103が開くガス圧レベル、レベルｂは弁体103が
閉じるガス圧レベルである。さて出口104側で使用され
るガス流量が大きくなるほどガス圧が減少する速度が早
くなるため第２図ｂに示すように傾きc1が傾きc2へと変
化する。そのため流量が大きいほど圧力変動周波数が高
くなる。第２図ｃは出口104側で使用されるガス流量と
出口104側の圧力変動周波数の関係を示している。The operation of the gas meter with a safety function configured as described above will be described below with reference to FIG. 1 and FIG. FIG. 2 is a diagram for explaining the operation of the adjuster 2 shown in FIG. 1 of the present invention. FIG. 2a is a structural diagram for conceptually explaining the structure of the adjuster 2. FIG. 101 is the regulator inlet, 102
Is a spring, 103 is a valve body, and 104 is an outlet of the regulator 2. The gas input from the LP gas cylinder 1 is applied to the inlet 10 of the regulator 2.
In addition to 1, push the valve body 103. If the pressure at the outlet 104 of the regulator 2 is low and the difference from the gas pressure at the inlet 101 becomes greater than the force of the spring 102, the valve body 103 is pushed down and gas flows from the inlet 101 to the outlet 104. Then, the gas pressure on the outlet 104 side rises and the difference from the gas pressure on the inlet 101 side becomes small, so that the valve body 103 is lifted up by the force of the spring 102 and shuts off the flow of gas. If no gas is used on the outlet 104 side, the gas on the outlet 104 side is confined in the pipe, so that the gas pressure on the outlet 104 side keeps a constant pressure and does not fluctuate. Therefore, the valve body 103 is kept closed. On the other hand, when the gas is used on the outlet 104 side, the gas on the outlet 104 side decreases and the gas pressure on the outlet 104 side starts to decrease. When the difference between the gas pressures on the inlet 101 side and the outlet 104 side exceeds the force of the spring 102, the valve body 103 is pushed down again, and gas is supplied from the inlet 101 side to the outlet 104 side, and the gas pressure on the outlet 104 side rises again. FIG. 2b shows how the gas pressure level on the outlet 104 side changes with time due to the repetition of the above operation. In the figure, the solid line is an example when the gas flow rate used on the outlet 104 side is small, and the dotted line is an example when the gas flow rate used on the outlet 104 side is large. Gas pressure at the outlet 104 side for supplying opens gas valve body 103 to the outlet 104 side increases rapidly at time t 1. Then stops the supply of gas to the valve body 103 closes the outlet 104 side has been reached a certain level the gas pressure at the outlet 104 side at time t 2. Then, since the gas is used on the outlet 104 side, the state where the gas pressure on the outlet 104 side is reduced is shown. Level a is the gas pressure level at which the valve 103 opens, and level b is the gas pressure level at which the valve 103 closes. Now, as the gas flow rate used on the outlet 104 side increases, the speed at which the gas pressure decreases increases, so that the gradient c1 changes to the gradient c2 as shown in FIG. 2b. Therefore, the larger the flow rate, the higher the pressure fluctuation frequency. FIG. 2c shows the relationship between the flow rate of gas used on the outlet 104 side and the pressure fluctuation frequency on the outlet 104 side.
さて第１図における圧力センサ12は第２図ｂに示す１
次側配管３内のガス圧の変動を検出する。一方流量計測
手段５により２次側配管４以降で使用されるガス流量が
検出される。上記ガス圧の変動情報とガス流量情報の２
つの情報から演算手段13の処理により１次側配管３で生
じるガス漏洩を検出する。演算手段13における処理とし
ていくつか考えられる。Now, the pressure sensor 12 in FIG.
A change in gas pressure in the secondary pipe 3 is detected. On the other hand, the flow rate measuring means 5 detects the flow rate of the gas used after the secondary pipe 4. 2 of the above gas pressure fluctuation information and gas flow rate information
From the two pieces of information, a gas leak occurring in the primary pipe 3 is detected by the processing of the calculating means 13. Several processes can be considered in the arithmetic means 13.
演算手段13における処理 （１）流量零の時にガス圧の変動をチェックする 流量零の時には第２図ｃに示すようにガス圧の変動周
波数は零である。すなわちガス圧の変動はない。しかし
ながらもし１次側配管３に小さな穴がありガス漏洩を引
き起こしていると流量計測手段５で測定した２次側配管
４以降の流量が零であっても１次側配管３内のガス圧は
わずかに変動する。演算手段13では流量零の時にガス圧
が変動すれば１次側配管３にガス漏洩があると判断し、
報知手段８に信号を出力する。強制的に遮断手段９を駆
動することにより流量零の状態をつくるようにしてもよ
い。Processing in the calculation means 13 (1) Check the fluctuation of gas pressure when the flow rate is zero When the flow rate is zero, the fluctuation frequency of the gas pressure is zero as shown in FIG. 2c. That is, there is no change in gas pressure. However, if there is a small hole in the primary pipe 3 causing gas leakage, the gas pressure in the primary pipe 3 is reduced even if the flow rate after the secondary pipe 4 measured by the flow rate measuring means 5 is zero. Fluctuates slightly. When the gas pressure fluctuates when the flow rate is zero, the calculating means 13 determines that there is a gas leak in the primary pipe 3, and
A signal is output to the notification means 8. The state where the flow rate is zero may be created by forcibly driving the shutoff means 9.
（２）学習による 第３図ａは演算手段13の構成を示すブロック図であ
る。同図において105は第１図の流量計測手段５からの
信号が入力端子、106は第１図の圧力センサ12からの信
号が入力する入力端子、107は流量をある時間Ｔ（例え
ば１分間）積分する積分回路、108は上記Ｔ時間の間の
圧力変動の平均周波数を検出する周波数検出回路、109
は積分回路107からの信号をアドレスとし、周波数検出
回路108からの信号を入力データとする記憶回路、110は
記憶回路109を書き込み状態にするか呼び出し状態にす
るか切り替えるリード／ライト端子、111は比較回路、
８は第１図の報知回路８である。(2) By learning FIG. 3a is a block diagram showing the configuration of the calculating means 13. In the figure, 105 is an input terminal for receiving a signal from the flow rate measuring means 5 in FIG. 1, 106 is an input terminal for receiving a signal from the pressure sensor 12 in FIG. 1, and 107 is a flow rate for a certain time T (for example, one minute). An integrating circuit 108 for integrating; a frequency detecting circuit 109 for detecting an average frequency of pressure fluctuation during the T time;
Is a storage circuit that uses a signal from the integration circuit 107 as an address and a signal from the frequency detection circuit 108 as input data, 110 is a read / write terminal that switches the storage circuit 109 between a write state and a call state, and 111 is a read / write terminal. Comparison circuit,
Reference numeral 8 denotes a notification circuit 8 shown in FIG.
以下第３図ａを参照しながら動作について説明する。
安全機能付きガスメータを設置してから例えば２週間の
間に使用流量の大きさと圧力変動周波数の関係を学習し
記憶回路109に記憶させる。この時リード／ライト端子1
10はライト側になっており記憶回路109に第２図ｃの関
係が書き込まれる。もちろん学習を行わせる前に遮断手
段９を駆動しガスを遮断して流量零をつくりこの状態で
圧力変動がないことを確認する。次に通常の使用状態に
おいてはリード／ライト端子110をリード側に設定し、
積分回路107により積分された流量の大きさをアドレス
として記憶回路109より記憶されている流量の大きさに
対応する圧力変動周波数データを比較回路111に出力さ
せる。比較回路111では記憶回路109からのデータと現時
点のデータである周波数検出回路108からのデータとを
比較する。もし第１図の１次側配管３にガス漏洩がなけ
れば２つの比較データは等しい。一方もし第１図の１次
側配管３にガス漏洩があれば記憶回路109からのデータ
よりも周波数検出回路108からのデータの方が周波数が
高くなるはずである。したがって比較回路111は２つの
データの差を検出してその差に応じた出力を報知手段８
に送出する。報知手段８では比較回路111からの信号の
大きさに応じて第１図の１次側配管３でのガス漏洩の大
きさを液晶表示あるいは通信手段を用いて人に知らせ
る。The operation will be described below with reference to FIG.
The relationship between the magnitude of the used flow rate and the pressure fluctuation frequency is learned and stored in the storage circuit 109, for example, for two weeks after the gas meter with the safety function is installed. At this time, read / write terminal 1
Reference numeral 10 denotes a write side, and the relationship shown in FIG. Of course, before the learning is performed, the shut-off means 9 is driven to cut off the gas to make the flow rate zero, and it is confirmed that there is no pressure fluctuation in this state. Next, in a normal use state, the read / write terminal 110 is set to the read side,
Using the magnitude of the flow rate integrated by the integration circuit 107 as an address, the pressure fluctuation frequency data corresponding to the magnitude of the flow rate stored in the storage circuit 109 is output to the comparison circuit 111. The comparison circuit 111 compares the data from the storage circuit 109 with the data from the frequency detection circuit 108 which is the current data. If there is no gas leakage in the primary pipe 3 in FIG. 1, the two comparison data are equal. On the other hand, if there is a gas leak in the primary pipe 3 in FIG. 1, the data from the frequency detection circuit 108 should have a higher frequency than the data from the storage circuit 109. Therefore, the comparison circuit 111 detects the difference between the two data and outputs an output corresponding to the difference.
To send to. The notifying means 8 notifies the person of the magnitude of the gas leakage in the primary pipe 3 of FIG. 1 using a liquid crystal display or communication means according to the magnitude of the signal from the comparison circuit 111.
（３）口火登録時に口火流量に対する圧力変動周波数を
記憶させておき比較する 上記（２）の例は学習した時点における流量に応じた
圧力変動周波数と現時点での流量に対する圧力変動周波
数の差が第１図の１次側配管３からのガス漏洩量に相当
することを利用している。しかしながら例えば大型給湯
器が使用されている時には大型給湯器のガス使用量が第
１図の１次側配管３からのガス漏洩に比べ非常に大きい
ため１次側配管３からのガス漏洩を検出することは非常
にむずかしい。そこで口火登録時に口火流量に対する圧
力変動周波数を記憶しておき口火のみ使用している時に
圧力変動周波数を測定して記憶されているデータと比較
する。(3) The pressure fluctuation frequency for the ignition flow is stored and compared at the time of ignition registration. In the example of the above (2), the difference between the pressure fluctuation frequency corresponding to the flow at the time of learning and the pressure fluctuation frequency for the current flow is the fourth. This is based on the fact that it corresponds to the amount of gas leakage from the primary side pipe 3 in FIG. However, for example, when a large-sized water heater is used, the gas leakage from the primary-side piping 3 is detected because the gas consumption of the large-sized water heater is much larger than the gas leakage from the primary-side piping 3 in FIG. It is very difficult. Therefore, the pressure fluctuation frequency for the ignition flow is stored at the time of ignition registration, and the pressure fluctuation frequency is measured when only the ignition is used, and is compared with the stored data.
演算手段13の処理として３つの手段を上記した。 Three means have been described above as the processing of the calculating means 13.
第３図ｂは第１図の演算手段13の他の構成例である。
106は圧力センサからの信号が入力する入力端子、112は
コンパレータである。８は第１図の報知手段８、９は第
１図の遮断手段９である。第１図の調整器２の圧力調整
機能が故障した場合、１次側配管３以降のガス圧が上昇
し危険な状態になることが考えられる。そこで圧力があ
る値以上に上昇した時にはコンパレータ112から出力を
出し、遮断手段９を駆動しガス器具側に異常なガス圧力
が加わらないようにすると同時に報知手段８を介して調
整器の故障を人に知らせる。FIG. 3b shows another example of the configuration of the calculating means 13 in FIG.
106 is an input terminal to which a signal from the pressure sensor is input, and 112 is a comparator. Reference numeral 8 denotes the notification means 8 in FIG. 1, and reference numeral 9 denotes the cutoff means 9 in FIG. If the pressure adjusting function of the regulator 2 shown in FIG. 1 fails, the gas pressure after the primary pipe 3 may be increased and a dangerous state may occur. Therefore, when the pressure rises above a certain value, an output is output from the comparator 112 and the shut-off means 9 is driven so that an abnormal gas pressure is not applied to the gas appliance side. Inform
以上のように本実施例によれば、ガスの使用量を計量
する計量器とガスの流れ状態を計測する流量計測手段と
前記流量計測手段からの信号によりガス使用状態を監視
し危険な状態の時にはガスを遮断する遮断手段と前記遮
断手段の前段に設けたガス圧の変動を検出する圧力セン
サと前記流量計測手段からの信号と前記圧力センサから
の信号の２つの信号を入力とする演算手段と前記演算手
段からの信号により報知を行う報知手段を設けることに
より、１次側配管からのガス漏洩を検出することができ
る。さらに調整器の故障についても検出することができ
る。As described above, according to the present embodiment, a gas meter is used to measure the amount of gas used, a flow rate measuring unit that measures the flow state of the gas, and a gas usage state is monitored by a signal from the flow rate measuring unit. An arithmetic unit which receives two signals of a signal from the pressure sensor, a signal from the flow rate measuring device, and a signal from the pressure sensor for detecting a change in gas pressure provided at a stage preceding the gas blocking device, And a notifying means for notifying by a signal from the calculating means, it is possible to detect gas leakage from the primary pipe. Further, a failure of the regulator can be detected.
発明の効果 以上のように本発明は、ガスの使用量を計量する計量
器と、ガスの流れ状態を計測する流量計測手段と、前記
流量計測手段からの信号によりガス使用状態を監視し危
険な状態の時にはガスを遮断する遮断手段と、前記遮断
手段の前段に設けたガス圧の変動を検出する圧力センサ
と、前記流量計測手段からの信号と前記圧力センサから
の信号の２つの信号を入力とする演算手段と、前記演算
手段からの信号により報知を行う報知手段とで構成さ
れ、前記演算手段は所定の期間にわたってガスの圧力変
動周期と流量の関係を測定し記憶する書き込み呼び出し
可能な記憶回路と、ある測定時間における圧力変動周期
と流量との関係と前記記憶回路に記憶されている圧力変
動周期と流量との関係を比較しある値以上の差がある時
にはガス漏れを示す出力を生じる比較回路を設けること
により、ガスメータの下流に設置されたガス器具がなん
であれ、所定の期間前記ガス器具を使用した時前記ガス
器具の使用流量と前記ガス器具使用時の圧力変動周期を
測定し学習することができ、よって記憶回路に流量と圧
力変動周期の関係を記憶することができる。そしてどの
ようなガス器具が使われている場合でも、記憶した流量
と圧力変動周期の関係と現在使われている流量と圧力変
動の関係を比較しその違いにより正確にガス漏れを検出
できる安全機能付きガスメータを提供することができ
る。Advantageous Effects of the Invention As described above, the present invention provides a measuring instrument for measuring the amount of gas used, a flow rate measuring means for measuring a gas flow state, and a method for monitoring a gas usage state by a signal from the flow rate measuring means. In the state, a shutoff means for shutting off gas, a pressure sensor provided at a stage preceding the shutoff means for detecting a change in gas pressure, and two signals of a signal from the flow rate measuring means and a signal from the pressure sensor are inputted. And a notifying means for performing notification by a signal from the calculating means, wherein the calculating means measures and stores the relationship between the pressure fluctuation cycle and the flow rate of the gas over a predetermined period, and is a writable and callable storage. The circuit and the relationship between the pressure fluctuation cycle and the flow rate at a certain measurement time and the relation between the pressure fluctuation cycle and the flow rate stored in the storage circuit are compared. By providing a comparison circuit that generates an output indicating this, whatever the gas appliance installed downstream of the gas meter, when the gas appliance is used for a predetermined period, the flow rate of the gas appliance and the pressure when the gas appliance is used The fluctuation period can be measured and learned, so that the relationship between the flow rate and the pressure fluctuation period can be stored in the storage circuit. And no matter what kind of gas equipment is used, the safety function that can detect the gas leak accurately by comparing the relationship between the stored flow rate and the pressure fluctuation cycle and the relationship between the flow rate and the pressure fluctuation currently used, and the difference The present invention can provide a gas meter equipped with the same.
第１図は本発明の実施例における安全機能付きガスメー
タのブロック図、第２図は同ガスメータの調整器の動作
説明図、第３図は同ガスメータの演算手段のブロック
図、第４図は従来の安全機能付きガスメータのブロック
図である。 ２……調整器、３……１次側配管、４……２次側配管、
５……流量計測手段、６……計量器、７……安全判定手
段、８……報知手段、９……ガス遮断手段、10……ガス
器具、11……安全機能付きガスメータ、12……圧力セン
サ、13……演算手段、107……積分回路、108……周波数
検出回路、109……記憶回路、111……比較回路。FIG. 1 is a block diagram of a gas meter with a safety function according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of an operation of a regulator of the gas meter, FIG. 3 is a block diagram of arithmetic means of the gas meter, and FIG. It is a block diagram of the gas meter with a safety function of FIG. 2 ... regulator, 3 ... primary side piping, 4 ... secondary side piping,
5 ... Flow measurement means, 6 ... Measuring instrument, 7 ... Safety determination means, 8 ... Notification means, 9 ... Gas shutoff means, 10 ... Gas appliances, 11 ... Gas meter with safety function, 12 ... Pressure sensor 13, arithmetic means 107, integrating circuit 108, frequency detecting circuit 109, memory circuit 111, comparing circuit 111
───────────────────────────────────────────────────── フロントページの続き (72)発明者 嶋田 拓生 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 白沢 忠徳 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平４−164220（ＪＰ，Ａ) 特開 平４−44198（ＪＰ，Ａ) 特開 平２−201509（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) G01F 3/22──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takuo Shimada 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-164220 (JP, A) JP-A-4-44198 (JP, A) JP-A-2-201509 (JP, A) (58) Fields investigated (Int. 6 , DB name) G01F 3/22
Claims (2)
流れ状態を計測する流量計測手段と、前記流量計測手段
からの信号によりガス使用状態を監視し危険な状態の時
にはガスを遮断する遮断手段と、前記遮断手段の前段に
設けたガス圧の変動を検出する圧力センサと、前記流量
計測手段からの信号と前記圧力センサからの信号の２つ
の信号を入力とする演算手段と、前記演算手段からの信
号により報知を行う報知手段とで構成され、前記演算手
段は所定の期間にわたってガスの圧力変動周期と流量の
関係を測定し記憶する書き込み呼び出し可能な記憶回路
と、ある測定時間における圧力変動周期と流量との関係
と前記記憶回路に記憶されている圧力変動周期と流量と
の関係とを比較しある値以上の差がある時にはガス漏れ
を示す出力を生じる比較回路を有している安全機能付き
ガスメータ。1. A measuring device for measuring a gas usage amount, a flow rate measuring means for measuring a gas flow state, a gas usage state is monitored by a signal from the flow rate measuring means, and a gas is shut off in a dangerous state. Interrupting means, a pressure sensor provided at a stage preceding the interrupting means for detecting a change in gas pressure, a calculating means for receiving two signals of a signal from the flow rate measuring means and a signal from the pressure sensor, A notifying means for notifying by a signal from the calculating means, wherein the calculating means measures and stores a relationship between a gas pressure fluctuation cycle and a flow rate over a predetermined period, and a write-callable storage circuit, and a certain measuring time The relationship between the pressure fluctuation cycle and the flow rate in the above and the relationship between the pressure fluctuation cycle and the flow rate stored in the storage circuit are compared, and when there is a difference greater than a certain value, an output indicating a gas leak is generated. Safety function meter having a comparison circuit.
期を記憶する記憶回路からなる請求項１記載の安全機能
付きガスメータ。2. A gas meter with a safety function according to claim 1, further comprising a storage circuit for storing a pressure fluctuation cycle with respect to an ignition flow at the time of ignition registration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2160508A JP2800376B2 (en) | 1990-06-19 | 1990-06-19 | Gas meter with safety function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2160508A JP2800376B2 (en) | 1990-06-19 | 1990-06-19 | Gas meter with safety function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0450727A JPH0450727A (en) | 1992-02-19 |
| JP2800376B2 true JP2800376B2 (en) | 1998-09-21 |
Family
ID=15716467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2160508A Expired - Lifetime JP2800376B2 (en) | 1990-06-19 | 1990-06-19 | Gas meter with safety function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2800376B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101437151B1 (en) * | 2012-09-21 | 2014-09-11 | 주식회사 부산도시가스 | Gas supply control system and Method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4993619B2 (en) * | 2008-07-14 | 2012-08-08 | リンナイ株式会社 | Gas stove |
| JP2010139360A (en) * | 2008-12-11 | 2010-06-24 | Tokyo Gas Co Ltd | Gas supply security apparatus and gas meter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2637219B2 (en) * | 1989-01-31 | 1997-08-06 | 矢崎総業株式会社 | Gas pressure measuring device |
| JPH0670575B2 (en) * | 1990-06-12 | 1994-09-07 | 工業技術院長 | Gas pressure abnormality detection device |
| JPH04164220A (en) * | 1990-06-18 | 1992-06-09 | Agency Of Ind Science & Technol | Gas pressure abnormality detecting device |
-
1990
- 1990-06-19 JP JP2160508A patent/JP2800376B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101437151B1 (en) * | 2012-09-21 | 2014-09-11 | 주식회사 부산도시가스 | Gas supply control system and Method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0450727A (en) | 1992-02-19 |
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