JPH0862002A - Method and apparatus for inspecting leakage using fluidic gas meter with flow sensor - Google Patents
Method and apparatus for inspecting leakage using fluidic gas meter with flow sensorInfo
- Publication number
- JPH0862002A JPH0862002A JP20088694A JP20088694A JPH0862002A JP H0862002 A JPH0862002 A JP H0862002A JP 20088694 A JP20088694 A JP 20088694A JP 20088694 A JP20088694 A JP 20088694A JP H0862002 A JPH0862002 A JP H0862002A
- Authority
- JP
- Japan
- Prior art keywords
- leakage
- flow sensor
- circuit
- leak
- gas meter
- 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.)
- Pending
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、フローセンサ付フルイ
ディックガスメータを用いて行う漏洩検査方法及びその
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leakage inspection method and apparatus using a fluidic gas meter with a flow sensor.
【０００２】[0002]
【従来の技術】フローセンサ付フルイディックガスメー
タには、ガスの漏洩を監視するための機能が付加されて
おり、この考え方は、図３に示すように、フローセンサ
１００からの流量信号を積算回路１０１で積算し、この
積算回路１０１が一定量（例えば１．５リットル）を積
算したときに１パスルを出力し、このパルスは判定回路
１０２に入力され、判定回路１０２は、一定時間（例え
ば１時間）毎にパルス入力があるか否かを監視し、パル
スありの状態が一定期間（例えば１カ月間）継続すれば
漏洩ありと判定して漏れ表示回路１０３で漏れ表示を行
う構成である。2. Description of the Related Art A fluidic gas meter with a flow sensor is provided with a function for monitoring gas leakage. This concept is as shown in FIG. The integration circuit 101 outputs 1 pulse when the integration circuit 101 integrates a fixed amount (for example, 1.5 liters), and this pulse is input to the determination circuit 102. Whether or not there is a pulse input every time) is monitored, and if the state of the pulse continues for a certain period (for example, one month), it is determined that there is a leak and the leak display circuit 103 displays a leak.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記従来の漏
洩判定方法においては、次のような欠点がある。低流量
をフローセンサによって測定するフルイディックガスメ
ータの場合、圧力変動等により流速に微小変動がある
と、これを積算してしまうことがある。例えば、微小信
号のばらつき（標準偏差）をσとすれば、ｎ回の積算値
のばらつきは√ｎσになるので、積算回数が増えるほ
ど、一定値（例えば１．５リットル）を超える確率が高
くなる。図４はこの具体例であって、（１）に示すよう
な流速の微小変動があった場合、これを前記したように
積算回路１０１で積算することから、例えば（ロ）にお
いて１．５リットルの積算値を得ると、（ハ）に示すよ
うに１パルス信号を出力してしまう。このため、実際に
はガスの漏洩がない場合でも、圧力の微小変動に基づく
流速から流量を測定し、これを基に流量信号を出力して
しまうことになり、判定回路１０３では、ガス漏れあり
と誤判定してしまう。本発明の目的は、誤判定を行う虞
れのないフローセンサ付フルイディックガスメータを用
いて行う漏洩検査方法及びその装置を提案することであ
る。However, the above-mentioned conventional leakage determination method has the following drawbacks. In the case of a fluidic gas meter that measures a low flow rate with a flow sensor, if there is a slight fluctuation in the flow velocity due to pressure fluctuation or the like, this may be integrated. For example, if the variation (standard deviation) of the minute signal is σ, the variation of the integrated value of n times is √nσ, so that the probability of exceeding a certain value (for example, 1.5 liters) increases as the number of integration increases. Become. FIG. 4 is a specific example of this, and when there is a minute change in the flow velocity as shown in (1), since it is integrated by the integrating circuit 101 as described above, for example, 1.5 liters in (b). When the integrated value of is obtained, one pulse signal is output as shown in (c). Therefore, even if there is no gas leakage in reality, the flow rate is measured from the flow rate based on the minute fluctuation of the pressure, and the flow rate signal is output based on this, and the determination circuit 103 outputs a gas leak. I will erroneously judge that. It is an object of the present invention to propose a leak inspection method and its apparatus, which are performed by using a fluidic gas meter with a flow sensor without the risk of making an erroneous determination.
【０００４】[0004]
【課題を解決するための手段】本発明に係るフローセン
サ付フルイディックガスメータを用いて行う漏洩検査方
法及びその装置は次のとおりである。The leak inspection method and apparatus using the fluidic gas meter with a flow sensor according to the present invention are as follows.
【０００５】１．一定時間内にフローセンサから出力さ
れる信号を平均化し、この平均化した値が設定値以下の
場合には漏洩なしと判定し、この漏洩なしの状態が一定
期間内に１回も判定されない場合には漏洩ありと判定す
るフローセンサ付フルイディックガスメータを用いて行
う漏洩検査方法。1. If the signals output from the flow sensor are averaged within a certain period of time, and if the averaged value is less than or equal to the set value, it is determined that there is no leakage, and if this state without leakage is not determined even once within a certain period of time. Is a leak inspection method that uses a fluidic gas meter with a flow sensor that determines that there is a leak.
【０００６】２．フローセンサから出力される信号を平
均化するための平均値演算回路と、前記平均値演算回路
から出力された値があらかじめ設定した値よりも小さい
場合には漏洩なしと判定し、この漏洩なしの状態が一定
期間内に１回も判定されない場合には漏洩ありと判定す
る漏洩判定回路と、漏洩判定回路が漏洩ありと判定した
場合に漏れ表示を行う漏れ表示回路と、から成るフロー
センサ付フルイディックガスメータを用いて行う漏洩検
査装置。2. An average value calculation circuit for averaging the signals output from the flow sensor, and if the value output from the average value calculation circuit is smaller than a preset value, it is determined that there is no leakage, If the state is not judged even once within a certain period, there is a leak judgment circuit that judges that there is a leak, and a leak display circuit that displays a leak when the leak judgment circuit judges that there is a leak. Leak inspection device using a Dick gas meter.
【０００７】[0007]
【作用】フローセンサ付フルイディックガスメータの場
合、夜間ガスの使用がないと考えられる時間帯を選ん
で、自動的にガスの漏洩検査を行っている。通常、ガス
の漏洩は微小であるので、この漏洩検査時の流量はフロ
ーセンサからの出力で計測される。本発明の場合、一定
時間内にフローセンサから出力される信号を平均値演算
回路で平均化し、漏洩判定回路はこの平均化した値が設
定値以下の場合は漏洩なしと判定するが、この漏洩なし
の状態が一定期間内に１回も判定されない場合には漏洩
ありと判定し、漏れ表示回路はこれを表示する。[Function] In the case of a fluidic gas meter with a flow sensor, a gas leak inspection is automatically performed by selecting a time period when no nighttime gas is considered to be used. Since gas leakage is usually minute, the flow rate at the time of leakage inspection is measured by the output from the flow sensor. In the case of the present invention, the signals output from the flow sensor are averaged by the average value calculation circuit within a fixed time, and the leakage determination circuit determines that there is no leakage when the averaged value is less than or equal to the set value. If the state of none is not determined even once within a certain period, it is determined that there is leakage, and the leakage display circuit displays this.
【０００８】[0008]
【実施例】図１は本発明を実施したフローセンサ付フル
イディックガスメータを示すものであって、１はメータ
本体、２はガス入口、３は出口、４はフルイディック素
子、５はノズル、６はフローセンサ、７はガス流路、８
は弁シート、９は電磁弁、１０は遮断弁、１１はリセッ
トボタン、１２は電子積算回路であって、この中には流
量計測機能以外に、本発明を実施するためのガス漏洩検
査回路が組み込まれている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a fluidic gas meter with a flow sensor embodying the present invention, in which 1 is a meter body, 2 is a gas inlet, 3 is an outlet, 4 is a fluidic element, 5 is a nozzle, and 6 is a nozzle. Is a flow sensor, 7 is a gas flow path, 8
Is a valve seat, 9 is a solenoid valve, 10 is a shutoff valve, 11 is a reset button, and 12 is an electronic integrating circuit. In addition to a flow rate measuring function, there is a gas leakage inspection circuit for implementing the present invention. It has been incorporated.
【０００９】図２はガス漏洩検査回路のブロック図であ
って、フローセンサ６で検出される流量信号は、積算回
路１３に入力されて積算される。同時にフローセンサ６
で検出される流量信号は、平均値演算回路１４に入力さ
れ、ここで平均値が求められる。平均値は漏洩判定回路
１５に入力される。漏洩判定回路１５は平均値演算回路
１４で平均化された値が、設定値以下の場合には漏洩な
しと判定し、この漏洩なしの状態が一定期間（実施例は
１カ月）内に１回も判定されない場合には漏洩ありと判
定して、漏れ表示回路１６に信号を送り、漏れ表示を行
う。図中１７は平均値時間（回数）設定回路であって、
フローセンサ６から出力される測定値の平均化回数をこ
れで設定する。１８は漏洩判定流量設定回路、１９は判
定期間設定回路である。FIG. 2 is a block diagram of the gas leakage inspection circuit. The flow rate signal detected by the flow sensor 6 is input to the integration circuit 13 and integrated. Flow sensor 6 at the same time
The flow rate signal detected at is input to the average value calculation circuit 14, and the average value is obtained here. The average value is input to the leakage determination circuit 15. When the value averaged by the average value calculation circuit 14 is less than or equal to the set value, the leakage determination circuit 15 determines that there is no leakage, and this leakage-free state occurs once within a certain period (one month in the embodiment). If no is determined, it is determined that there is a leak, and a signal is sent to the leak display circuit 16 to display a leak. In the figure, 17 is an average value time (number of times) setting circuit,
This sets the number of times of averaging the measured values output from the flow sensor 6. Reference numeral 18 is a leakage determination flow rate setting circuit, and 19 is a determination period setting circuit.
【００１０】[0010]
【発明の効果】本発明は以上の如き方法と装置により漏
洩判定を行うため、次の効果を奏する。ガスの流速に微
小変動があっても漏洩判定を誤ることがない。例えば微
小信号のばらつき（標準偏差）をσとすればｎ回の平均
値はσ／√ｎとなり、回数を増すほど流量測定精度が高
くなるので、判定の誤りは殆んどなくなる。The present invention has the following effects because the leak determination is performed by the method and apparatus as described above. Even if there is a slight change in the gas flow velocity, the leak determination will not be erroneous. For example, if the variation (standard deviation) of a minute signal is σ, the average value of n times is σ / √n, and the higher the number of times, the higher the accuracy of flow rate measurement, and therefore the determination error is almost eliminated.
【図１】本発明を実施したフローセンサ付フルイディッ
クガスメータの説明図。FIG. 1 is an explanatory diagram of a fluidic gas meter with a flow sensor embodying the present invention.
【図２】本発明を実施するための電子回路（装置）のブ
ロック図。FIG. 2 is a block diagram of an electronic circuit (device) for implementing the present invention.
【図３】従来の漏洩検査方法の説明図。FIG. 3 is an explanatory diagram of a conventional leak inspection method.
【図４】従来の漏洩検査において誤判定を行う理由の説
明図。FIG. 4 is an explanatory diagram of a reason for making an erroneous determination in a conventional leak inspection.
１ メータ本体 ４ フルイディック素子 ６ フローセンサ １３ 積算回路 １４ 平均値演算回路 １５ 漏洩判定回路 １６ 漏れ表示回路 １７ 平均時間設定回路 １８ 漏洩判定流量設定回路 １９ 判定期間設定回路 1 Meter Main Body 4 Fluidic Element 6 Flow Sensor 13 Integration Circuit 14 Average Value Calculation Circuit 15 Leakage Judgment Circuit 16 Leakage Display Circuit 17 Average Time Setting Circuit 18 Leakage Judgment Flow Rate Setting Circuit 19 Judgment Period Setting Circuit
Claims (2)
る信号を平均化し、この平均化した値が設定値以下の場
合には漏洩なしと判定し、この漏洩なしの状態が一定期
間内に１回も判定されない場合には漏洩ありと判定する
フローセンサ付フルイディックガスメータを用いて行う
漏洩検査方法。1. A signal output from a flow sensor is averaged within a fixed time, and when the averaged value is less than or equal to a set value, it is determined that there is no leakage, and the state without leakage is 1 within a certain period. A leak inspection method that uses a fluidic gas meter with a flow sensor that determines that there is a leak if the number of times is not determined.
化するための平均値演算回路と、 前記平均値演算回路から出力された値があらかじめ設定
した値よりも小さい場合には漏洩なしと判定し、この漏
洩なしの状態が一定期間内に１回も判定されない場合に
は漏洩ありと判定する漏洩判定回路と、 漏洩判定回路が漏洩ありと判定した場合に漏れ表示を行
う漏れ表示回路と、 から成るフローセンサ付フルイディックガスメータを用
いて行う漏洩検査装置。2. An average value calculation circuit for averaging the signals output from the flow sensor, and when the value output from the average value calculation circuit is smaller than a preset value, it is determined that there is no leakage. , If there is no leakage within the fixed period of time, the leakage judgment circuit judges that there is a leakage, and if the leakage judgment circuit judges that there is a leakage, the leakage display circuit displays the leakage. Leak inspection device using a fluidic gas meter with a flow sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20088694A JPH0862002A (en) | 1994-08-25 | 1994-08-25 | Method and apparatus for inspecting leakage using fluidic gas meter with flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20088694A JPH0862002A (en) | 1994-08-25 | 1994-08-25 | Method and apparatus for inspecting leakage using fluidic gas meter with flow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0862002A true JPH0862002A (en) | 1996-03-08 |
Family
ID=16431888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20088694A Pending JPH0862002A (en) | 1994-08-25 | 1994-08-25 | Method and apparatus for inspecting leakage using fluidic gas meter with flow sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0862002A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005098865A (en) * | 2003-09-25 | 2005-04-14 | Osaka Gas Co Ltd | Meter apparatus |
| JP2016050905A (en) * | 2014-09-02 | 2016-04-11 | パナソニック株式会社 | Gas shut-off device |
-
1994
- 1994-08-25 JP JP20088694A patent/JPH0862002A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005098865A (en) * | 2003-09-25 | 2005-04-14 | Osaka Gas Co Ltd | Meter apparatus |
| JP4592268B2 (en) * | 2003-09-25 | 2010-12-01 | 大阪瓦斯株式会社 | Meter device |
| JP2016050905A (en) * | 2014-09-02 | 2016-04-11 | パナソニック株式会社 | Gas shut-off device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111024327B (en) | Device and method for air leakage self-checking and air leakage detection of object to be detected | |
| JP3295235B2 (en) | Method for judging gas leakage from inner tube using fluidic gas meter with flow sensor | |
| JPH0862002A (en) | Method and apparatus for inspecting leakage using fluidic gas meter with flow sensor | |
| JP3295236B2 (en) | Method for judging gas leakage from inner tube using fluidic gas meter with flow sensor | |
| JP3069265B2 (en) | Gas safety equipment | |
| JPH0727659A (en) | Gas leakage detection method | |
| CN113811745B (en) | Gas safety device | |
| JP2997576B2 (en) | Output method of unit flow rate signal for leakage inspection in fluidic gas meter | |
| JPH10103547A (en) | Gas-blast circuit breaking device | |
| JPH05273012A (en) | Inspecting method for return leakage in fluidic type gas meter with micro-flow sensor | |
| JP5006492B2 (en) | Flow meter with gas leak detection function | |
| JP2001330487A (en) | Membrane type gas meter | |
| JPH03264821A (en) | Method for processing output signal of composite sensor | |
| US12025479B2 (en) | Monitoring a disturbing variable of a measuring device system by monitoring an error velocity of the measuring device system | |
| JP2800376B2 (en) | Gas meter with safety function | |
| JPH0727658A (en) | Gas leakage detection method | |
| JP2004354280A (en) | Detector for connecting pipe clogging and differential pressure/pressure transmitter containing same | |
| JPH0648330Y2 (en) | Orifice diameter pass / fail discriminating device | |
| JPH10232150A (en) | Fluidic type gas meter | |
| JP3152824B2 (en) | Flow measurement device | |
| JPH11142203A (en) | Gas meter | |
| JP4175586B2 (en) | Flow meter and flow integration method | |
| JPH04350705A (en) | Self-diagnostic device for mass flow controller | |
| JP2735678B2 (en) | Flow sensor type flow meter | |
| JP2763697B2 (en) | Gas meter with safety function |