JP3117835B2 - Gas leak detection method - Google Patents

Gas leak detection method

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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
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JP
Japan
Prior art keywords
gas
detection method
leakage
gas leak
leak detection
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Expired - Fee Related
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JP05040893A
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Japanese (ja)
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JPH06249742A (en
Inventor
秀樹 古川
勉 大谷
和也 藤澤
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東京瓦斯株式会社
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Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【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。 The present invention relates to a method for detecting gas leakage in general household.

【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. The gas leakage detection method in Related Art Generally household, a. 漏れたガスをガス漏れ検知器で検出する方法、b. Method for detecting a leaking gas in a gas leak detector, 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. Method of blocking a gas upon detection of a large amount of gas flow in a gas meter abnormal, 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。 Method of blocking the gas is known when the constant flow of gas continues to flow continuously a certain time.

【0003】 [0003]

【発明が解決しようとする課題】しかし、上記a. The object of the invention is to be Solved However, the above-mentioned 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。 In the case of can not be detected even going gas leak in the middle of a room or the like Toka indoor piping gas leak detector is not attached.

【0004】次にb. [0004] then 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。 For, it can not be detected for the set flow rate less gas leakage.

【0005】次にc. [0005] The next 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。 For, it may be determined that there is gas leakage by way of the use of the gas appliance.

【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。 An object of the present invention, when there is gas leakage on the downstream side of the gas meter, regardless of the magnitude of the leakage amount, or shut off the gas it is determined that a short time accurately located gas leak, alert it is to provide a gas leak detection method can.

【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。 Gas leak detection method according to the present invention, in order to solve the problem] is as follows.

【0008】 ガバナー付ガス器具が使用されている状態 [0008] The state in which the gas with a governor device is being used
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 The gas leak inspection method performed by, detecting the gas supply pressure and the gas flow rate, the DC component removed by subtracting the average value of each from each of the square root and the gas flow rate of the resulting gas supply pressure, gas supply pressure the correlation coefficient between the gas flow rate
数1により演算して求め、この値があらかじめ定めた値 Determined by calculating the number 1, the value this value is predetermined
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。 Gas leakage is with determining gas leak detection method in the case of more than.

【0009】 [0009]

【数2】 [Number 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 [0010] Xa (n): the square root of the gas supply pressure fluctuations Yb (n): flow rate variation Rab (k): the correlation coefficient between the gas supply pressure and the gas flow rate (k): the pressure measuring point and the flow measurement point to correct the difference of position
るための補正値 Because of the correction value

【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。 In the present invention, if there is nothing to prevent the flow of gas to the gas appliance side, between the square root of the gas flow rates of the gas supply pressure, focusing on that there is theoretically proportional, in addition to the gas flow rate by performing arithmetic processing using this arithmetic expression to detect the gas supply pressure, by utilizing the fact that taking the value of the correlation coefficient corresponding to the amount of gas leakage, the presence or absence of gas leakage to guess the amount of gas leakage it is intended to determine.

【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。 [0012] For example, the closer to exactly zero is the relationship between the gas supply pressure and the gas flow rate even if you use a gas leakage of a normal instrument has occurred at the same time, this time be sure you are using the instrument, gas leak determines that it has not occurred, on the other hand, if there is a correlation is the correlation of the size, and estimate the amount of gas leakage to the total flow rate, if it is determined that gas leakage is blocked gas, or At the same time issuing a gas leak alarm.

【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。 EXAMPLES First, to detect the gas flow in a gas meter, further detects the gas supply pressure by the gas pressure detecting sensor attached to the gas meter. 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。 The detection value, pressure variations, are input to the gas flow rate correlation calculation inference mechanism. 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。 The pressure fluctuations in the gas flow correlation calculation inference engine performs the following operations.

【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。 [0014] After removal of the DC component by subtracting the average value of each from each of the square root and the gas flow rates of the gas supply pressure, it performs calculation of number 3 examines the correlation.

【0015】 [0015]

【数3】 [Number 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、X a (n):ガス圧の平方根の変動、Y b (n):流量変動、とした時のR ab (o)を算出する。 [0016] Since there is little time delay between the gas pressure fluctuation and the flow rate variation, X a (n): variation in the gas pressure square root, Y b (n): flow rate variation, and the time R ab ( o) is calculated.

【0017】R ab (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。 [0017] R ab (o) takes the larger value when correlation is strong, and vigorous gas flow rate variation between the gas supply pressure and the gas flow rate.

【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R ab (o)は大きくなる。 [0018] Therefore, even if the same way, have caused a gas leak as when a large amount of gas leakage R ab (o) increases. 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R ab (o)である。 Table 1 When the gas supply pressure is fluctuating about 200 ± 7 mm, a R ab (o) when caused the gas leak.

【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。 To determine the guess gas leakage the amount of gas leakage from the correlation between the gas supply pressure and the gas flow rate as the present invention above, according to the present invention, any kind of gas leakage on the downstream side of the gas meter, accurately and reliably time to determine the gas leak with detectably be short, 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。 [0021] Also, according to the present invention, the correlation even if the noise on both of the gas supply pressure and gas flow rate are riding relatively accurately detected.

───────────────────────────────────────────────────── 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 ────────────────────────────────────────────────── ─── of the front page continued (58) investigated the field (Int.Cl. 7, DB name) G01M 3/00 - 3/40 G01F 1/00 G01F 3/22 G08B 21/00

Claims (1)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】 ガバナー付ガス器具が使用されている状 1. A Jo of gas with the governor device is being used
    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 The gas leak inspection method performed in condition to detect the gas supply pressure and the gas flow rate, the DC component removed by subtracting the average value of each from each of the square root and the gas flow rate of the resulting gas supply pressure, gas supply the correlation coefficient of the pressure and the gas flow rate
    を数1により演算して求め、この値があらかじめ定めた Determined by calculating the number 1, this value is predetermined
    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。 Gas leakage is with determining gas leak detection method in the case of more value. 【数1】 [Number 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 Xa (n): the square root of the gas supply pressure fluctuations Yb (n): flow rate variation Rab (k): the correlation coefficient between the gas supply pressure and the gas flow rate (k): the difference between the position of the pressure measuring point and the flow measurement point to correct the
    るための補正値 Because of the correction value
JP05040893A 1993-03-02 1993-03-02 Gas leak detection method Expired - Fee Related JP3117835B2 (en)

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)

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JPH06249742A JPH06249742A (en) 1994-09-09
JP3117835B2 true JP3117835B2 (en) 2000-12-18

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
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
AU739944B2 (en) 1997-05-16 2001-10-25 Resmed Limited Nasal ventilation as a treatment for stroke

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