JP3117835B2 - Gas leak detection method - Google Patents
Gas leak detection methodInfo
- Publication number
- JP3117835B2 JP3117835B2 JP05040893A JP4089393A JP3117835B2 JP 3117835 B2 JP3117835 B2 JP 3117835B2 JP 05040893 A JP05040893 A JP 05040893A JP 4089393 A JP4089393 A JP 4089393A JP 3117835 B2 JP3117835 B2 JP 3117835B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- flow rate
- value
- supply pressure
- gas supply
- 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 - Fee Related
Links
Landscapes
- Measuring Volume Flow (AREA)
- Examining Or Testing Airtightness (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、一般家庭においてガス
漏れを検出するための方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting gas leaks in ordinary households.
【０００２】[0002]
【従来の技術】一般家庭におけるガス漏れ検出方法とし
ては、ａ．漏れたガスをガス漏れ検知器で検出する方
法、ｂ．異常に多量のガス流量をガスメータで検出した
ときにガスを遮断する方法、ｃ．一定流量のガスが一定
時間継続して流れ続けた時にガスを遮断する方法が公知
である。2. Description of the Related Art As a method for detecting gas leaks in general households, there are a. A method of detecting a leaked gas with a gas leak detector, b. Shutting off the gas when an abnormally large gas flow is detected by the gas meter; c. 2. Description of the Related Art A method of shutting off a gas when a constant flow rate of a gas has continued to flow for a certain period of time is known.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記ａ．の場
合は、ガス漏れ検知器が取り付けられていない部屋とか
屋内配管の途中等でガス漏れが起こっていても検出でき
ない。However, a. In the case of (1), it cannot be detected even if a gas leak has occurred in a room where no gas leak detector is installed or in the middle of indoor piping.
【０００４】次にｂ．の場合、設定流量以下のガス漏れ
については検出できない。Next, b. In the case of, gas leaks below the set flow rate cannot be detected.
【０００５】次にｃ．の場合、ガス器具の使用の仕方に
よってはガス漏れありと判断されることがある。Next, c. In this case, it may be determined that there is gas leakage depending on how the gas appliance is used.
【０００６】本発明の目的は、ガスメータより下流側に
おいてガス漏れがあった場合、漏れ量の大小にかかわら
ず、短時間に正確にガス漏れありと判定してガスを遮断
したり、警報を出すことができるガス漏れ検出方法を提
供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for accurately determining a gas leak in a short time and shutting off the gas or issuing an alarm, regardless of the magnitude of the leak, when the gas leaks downstream of the gas meter. It is an object of the present invention to provide a method for detecting gas leaks.
【０００７】[0007]
【課題を解決するための手段】本発明に係るガス漏れ検
出方法は次のとおりである。The gas leak detecting method according to the present invention is as follows.
【０００８】ガバナー付ガス器具が使用されている状態
で行うガス洩れ検査方法において、ガス供給圧力とガス
流量を検出し、得られたガス供給圧力の平方根とガス流
量のそれぞれの値から各々の平均値を引くことにより直
流分を取り除き、ガス供給圧力とガス流量の相関係数を
数１により演算して求め、この値があらかじめ定めた値
以上の場合にガス漏れありと判定するガス漏れ検出方
法。 A state in which a gas appliance with a governor is used
In the gas leak inspection method performed in the above, the gas supply pressure and the gas flow rate are detected, and the DC component is removed by subtracting each average value from each of the square root of the obtained gas supply pressure and each value of the gas flow rate. And the gas flow rate correlation coefficient
Calculated by Equation 1 and this value is a predetermined value
A gas leak detection method for determining that there is gas leak in the above case .
【０００９】[0009]
【数２】 (Equation 2)
【００１０】Ｘa （ｎ）：ガス供給圧力の平方根の変動 Ｙb （ｎ）：流量変動 Ｒab（k）：ガス供給圧力とガス流量との相関係数（ｋ）： 圧力測定点と流量測定点の位置の差を補正す
るための補正値 Xa (n): Fluctuation of square root of gas supply pressure Yb (n): Fluctuation of flow rate Rab ( k ): Correlation coefficient (k) between gas supply pressure and gas flow rate : between pressure measurement point and flow measurement point Correct the position difference
Correction value for
【００１１】本発明では、ガス器具側にガスの流れを妨
げるものがなければ、ガス供給圧力の平方根とガス流量
の間に、理論的に比例関係があることに着目し、ガス流
量の他にガス供給圧力を検出して本演算式を用いて演算
処理を行うことにより、ガス漏れ量に応じた相関係数の
値をとることを利用して、ガス漏れの量を推測しガス漏
れの有無を判別するものである。The present invention focuses on the fact that there is a theoretical proportional relationship between the square root of the gas supply pressure and the gas flow rate unless there is an obstacle on the gas appliance side that prevents the gas flow. By detecting the gas supply pressure and performing arithmetic processing using this arithmetic expression, it is possible to estimate the amount of gas leakage by taking the value of the correlation coefficient according to the amount of gas leakage and to determine whether there is gas leakage. Is to be determined.
【００１２】例えば、通常の器具の使用とガス漏れが同
時に起こった場合でもガス供給圧力とガス流量の間の関
係が全く零に近ければ、この時は必ず器具を使用してい
て、ガス漏れは起こっていないと判断し、一方、相関性
がある場合には、相関性の大きさにより、全体流量に占
めるガス漏れの量を推定し、ガス漏れと判別した場合に
はガスを遮断し，或いは同時にガス漏れ警報を出す。For example, even when the use of a normal instrument and the gas leak occur at the same time, if the relationship between the gas supply pressure and the gas flow rate is completely close to zero, the instrument is always used at this time, and the gas leak is reduced. Judgment that it has not occurred, on the other hand, if there is correlation, estimate the amount of gas leakage in the total flow rate based on the magnitude of the correlation, and if it is determined to be gas leakage, shut off the gas, or At the same time, a gas leak alarm is issued.
【００１３】[0013]
【実施例】先ず、ガスメータでガス流量を検出し、更に
このガスメータに取り付けられたガス圧力検出センサー
によりガス供給圧力を検出する。この検出値は、圧力変
動、ガス流量相関性の演算推論機構に入力される。こ
の、圧力変動、ガス流量相関性の演算推論機構では、次
の演算を行う。First, a gas flow rate is detected by a gas meter, and a gas supply pressure is detected by a gas pressure detection sensor attached to the gas meter. This detected value is input to a pressure fluctuation and gas flow rate correlation inference mechanism. The calculation and inference mechanism of the correlation between the pressure fluctuation and the gas flow rate performs the following calculation.
【００１４】ガス供給圧力の平方根とガス流量のそれぞ
れの値から各々の平均値を引くことにより直流分を取り
除いた後、数３の演算を行い、相関を調べる。After the DC component is removed by subtracting each average value from each value of the square root of the gas supply pressure and each value of the gas flow rate, the calculation of Equation 3 is performed to check the correlation.
【００１５】[0015]
【数３】 (Equation 3)
【００１６】ガス圧変動と流量変動の間にはほとんど時
間的遅れはないため、Ｘa （ｎ）：ガス圧の平方根の変
動、Ｙb （ｎ）：流量変動、とした時のＲab（ｏ）を算
出する。Since there is almost no time delay between the gas pressure fluctuation and the flow rate fluctuation, R ab (X a (n): the square root fluctuation of the gas pressure, and Y b (n): the flow rate fluctuation) o) is calculated.
【００１７】Ｒab（ｏ）は、ガス供給圧力とガス流量と
の間の相関関係が強く、かつガス流量変動が激しい時ほ
ど大きい値をとる。R ab (o) takes a larger value as the correlation between the gas supply pressure and the gas flow rate is stronger and the gas flow rate fluctuates more drastically.
【００１８】従って、同じようにガス漏れを起こしてい
てもガス漏れ量が大きい時ほどＲab（ｏ）は大きくな
る。表１はガス供給圧力が２００±７ｍｍ程度変動して
いる時、ガス漏れを起こしたときのＲab（ｏ）である。Therefore, even if gas leakage occurs, the larger the gas leakage amount, the larger R ab (o). Table 1 shows R ab (o) when gas leakage occurred when the gas supply pressure fluctuated about 200 ± 7 mm.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】本発明は以上のようにガス供給圧力とガ
ス流量との間の相関関係からガス漏れ量を推測しガス漏
れを判定するため、ガスメータの下流側におけるどのよ
うなガス漏れも、正確かつ確実に検出できると共にガス
漏れを判定するまでの時間は短くて済み、安全性が向上
する。As described above, the present invention estimates the amount of gas leakage from the correlation between the gas supply pressure and the gas flow rate to determine gas leakage. Accurate and reliable detection is possible, and the time required to determine gas leakage is short, and safety is improved.
【００２１】又、本発明によると、ガス供給圧力とガス
流量の両者に雑音がのっている場合であっても相関関係
を比較的正確に検出できる。Further, according to the present invention, even when both the gas supply pressure and the gas flow rate have noise, the correlation can be detected relatively accurately.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01M 3/00 - 3/40 G01F 1/00 G01F 3/22 G08B 21/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. 7 , DB name) G01M 3/00-3/40 G01F 1/00 G01F 3/22 G08B 21/00
Claims (1)
態で行うガス洩れ検査方法において、ガス供給圧力とガ
ス流量を検出し、得られたガス供給圧力の平方根とガス
流量のそれぞれの値から各々の平均値を引くことにより
直流分を取り除き、ガス供給圧力とガス流量の相関係数
を数１により演算して求め、この値があらかじめ定めた
値以上の場合にガス漏れありと判定するガス漏れ検出方
法。 【数１】 Ｘa （ｎ）：ガス供給圧力の平方根の変動 Ｙb （ｎ）：流量変動 Ｒab（k）：ガス供給圧力とガス流量との相関係数（ｋ）： 圧力測定点と流量測定点の位置の差を補正す
るための補正値 1. A state in which a gas appliance with a governor is used.
In the gas leak inspection method performed in the state, the gas supply pressure and the gas flow rate are detected, and the DC component is removed by subtracting the average value from each value of the obtained square root of the gas supply pressure and the gas flow rate, thereby removing the gas supply. Correlation coefficient between pressure and gas flow
Is calculated by Equation 1, and this value is determined in advance.
A gas leak detection method that determines that there is a gas leak when the value is equal to or greater than the value . (Equation 1) Xa (n): Fluctuation of square root of gas supply pressure Yb (n): Fluctuation of flow rate Rab ( k ): Correlation coefficient (k) between gas supply pressure and gas flow rate : Difference between positions of pressure measurement point and flow measurement point Correct
Correction value for
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05040893A JP3117835B2 (en) | 1993-03-02 | 1993-03-02 | Gas leak detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05040893A JP3117835B2 (en) | 1993-03-02 | 1993-03-02 | Gas leak detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06249742A JPH06249742A (en) | 1994-09-09 |
| JP3117835B2 true JP3117835B2 (en) | 2000-12-18 |
Family
ID=12593194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05040893A Expired - Fee Related JP3117835B2 (en) | 1993-03-02 | 1993-03-02 | Gas leak detection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3117835B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPO163896A0 (en) * | 1996-08-14 | 1996-09-05 | Resmed Limited | Determination of respiratory airflow |
| AUPO247496A0 (en) | 1996-09-23 | 1996-10-17 | Resmed Limited | Assisted ventilation to match patient respiratory need |
| AUPO301796A0 (en) | 1996-10-16 | 1996-11-07 | Resmed Limited | A vent valve apparatus |
| EP1009464A4 (en) | 1997-05-16 | 2006-08-02 | Peter Craig Farrell | Nasal ventilation as a treatment for stroke |
-
1993
- 1993-03-02 JP JP05040893A patent/JP3117835B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06249742A (en) | 1994-09-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| LAPS | Cancellation because of no payment of annual fees |