JP2944736B2 - Method and apparatus for detecting gas leakage location - Google Patents
Method and apparatus for detecting gas leakage locationInfo
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- JP2944736B2 JP2944736B2 JP30184790A JP30184790A JP2944736B2 JP 2944736 B2 JP2944736 B2 JP 2944736B2 JP 30184790 A JP30184790 A JP 30184790A JP 30184790 A JP30184790 A JP 30184790A JP 2944736 B2 JP2944736 B2 JP 2944736B2
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- gas
- gas concentration
- location
- concentration
- diagram
- Prior art date
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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、土壌中に埋設されたたとえば管などから、
ガスが漏洩した場所を検出する方法および装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATIONS
The present invention relates to a method and an apparatus for detecting a location where gas has leaked.
従来の技術 典型的な先行技術は、第12図に示されている。土壌１
には、都市ガスなどのガスを輸送する管２が埋設されて
いる。この管２のたとえば管継手３付近からガスが漏洩
しているとき、この漏洩場所を検出するために、従来で
は、管２の直上でその管２の長手方向に沿つてたとえば
約1m間隔で、複数の掘削孔４を形成し、各掘削孔４内に
吸引管５を挿入し、掘削孔４内のガスを吸引ポンプなど
を用いて吸引し、この吸引されたガスの濃度を、ガス濃
度検出手段６によつて測定する。こうして得られたガス
濃度の測定値は、第13図（１）に示されるように、記録
紙上に各場所P1〜P6の掘削孔４毎に書き留め、これらの
一連の測定値のうち、最大のガス濃度ａが得られる掘削
孔4aの位置P4付近で、ガスの漏洩が生じているものと判
断する。Prior Art A typical prior art is shown in FIG. Soil 1
Is embedded with a pipe 2 for transporting gas such as city gas. Conventionally, when a gas is leaking from the vicinity of the pipe joint 3 of the pipe 2, in order to detect the location of the leak, conventionally, for example, at a distance of about 1 m along the longitudinal direction of the pipe 2 directly above the pipe 2, A plurality of drilling holes 4 are formed, a suction pipe 5 is inserted into each of the drilling holes 4, and the gas in the drilling holes 4 is sucked using a suction pump or the like, and the concentration of the sucked gas is detected by gas concentration detection. Measured by means 6. As shown in FIG. 13 (1), the measured gas concentration values obtained in this manner are written down on the recording paper for each of the excavation holes 4 at each of the locations P1 to P6. It is determined that gas leakage has occurred near the position P4 of the excavation hole 4a where the gas concentration a is obtained.
発明が解決すべき課題 このような先行技術では、第13図（２）に示されるよ
うに各場所P1〜P7のうち、ガス濃度の極大値ｂが複数個
表れるときがあり、あるいはまた、複数の掘削孔４にわ
たつて広範囲に同程度のガス濃度が測定されるときがあ
り、これらのときには、ガスの漏洩場所を容易に検出す
ることができず、作業者の経験と勘に頼らざるを得な
い。Problems to be Solved by the Invention In such prior art, as shown in FIG. 13 (2), among the locations P1 to P7, a plurality of maximum values b of the gas concentration may appear, or In some cases, the same gas concentration is measured over a wide range over the excavation hole 4 of the pit, and in these cases, the location of the gas leak cannot be easily detected, and the operator must rely on the experience and intuition of the operator. I can't get it.
本発明の目的は、ガスの漏洩場所の検出を容易に、し
かも正確に行うことができるようにしたガスの漏洩場所
の検出方法および装置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 and an apparatus for detecting a gas leakage location, which can easily and accurately detect a gas leakage location.
課題を解決するための手段 本発明は、土壌中に複数の掘削孔を形成し、 各掘削孔内の上下方向の複数の各測定場所におけるガ
ス濃度を測定し、 ガス濃度の測定結果に基づいて、縦の平面内での等濃
度の場所を線で結んだ等濃度線図を描き、この等濃度線
図の中の濃度が高い場所を、漏洩場所と判断することを
特徴とするガスの漏洩場所の検出方法である。Means for Solving the Problems The present invention forms a plurality of drilling holes in soil, measures gas concentration at each of a plurality of measurement locations in the vertical direction in each drilling hole, and based on the measurement result of the gas concentration. Draws an iso-density diagram by connecting lines of equal concentration in a vertical plane with a line, and determines a location with a high concentration in this iso-density diagram as a leak location. This is a method of detecting a place.
また本発明は、土壌中に複数の掘削孔を形成し、 各掘削孔内の同一深さの測定場所におけるガス濃度を
測定し、 ガス濃度の測定結果に基づいて、水平面内での等濃度
の場所を線で結んだ等濃度線図を描き、 この等濃度線図の中の濃度が高い場所を、漏洩場所と
判断することを特徴とするガスの漏洩場所の検出方法で
ある。The present invention also provides a method of forming a plurality of drilling holes in soil, measuring a gas concentration at a measurement location at the same depth in each of the drilling holes, and, based on a measurement result of the gas concentration, determining an equal concentration in a horizontal plane. This is a method for detecting a gas leakage location, characterized by drawing an isoconcentration diagram connecting locations with lines, and determining a location having a high concentration in the isoconcentration diagram as a leakage location.
また本発明は、細長い支持部材と、 支持部材の長手方向に間隔をあけて設けられる複数の
ガス濃度検出素子と、 支持部材の挿入される土壌に形成された掘削孔の場所
を入力する入力手段と、 ガス濃度検出素子と入力手段との各出力に応答し、等
濃度の場所を線で結んだ等濃度線図を作成する手段と、 作成手段によつて作成された等濃度線図を出力表示す
る手段とを含むことを特徴とするガスの漏洩場所の検出
装置である。Further, the present invention provides an elongated support member, a plurality of gas concentration detecting elements provided at intervals in the longitudinal direction of the support member, and input means for inputting a location of a drill hole formed in the soil into which the support member is inserted. Means for creating an isoconcentration diagram in which equal concentration locations are connected by lines in response to each output of the gas concentration detecting element and the input means, and outputting the isoconcentration chart created by the creating means And a display means for displaying a gas leak location.
作 用 本発明に従えば、たとえば地中埋設管の直上などで、
土壌中に複数の掘削孔を形成し、各掘削孔内の上下方
向、たとえば鉛直方向の複数各測定場所で、ガス濃度を
測定し、こうして得られたガス濃度の測定結果に基づい
て、縦の平面内、たとえば鉛直平面内での等濃度線図を
描き、この等濃度線図の中の濃度が高い場所を、漏洩場
所と判断する。このようにして、作業者の経験と勘に頼
ることなしに、容易に、しかも正確にガスの漏洩場所を
検出することができる。According to the present invention, for example, just above an underground pipe,
A plurality of drilling holes are formed in the soil, the gas concentration is measured in the vertical direction in each drilling hole, for example, at each of a plurality of measurement locations in the vertical direction, and based on the measurement results of the gas concentration obtained in this manner, a vertical An isodensity diagram is drawn in a plane, for example, a vertical plane, and a place having a high concentration in the isodensity diagram is determined to be a leakage place. In this way, it is possible to easily and accurately detect a gas leak location without relying on the experience and intuition of the operator.
また本発明に従えば、土壌中に形成された複数の各掘
削孔内で、同一深さの測定場所におけるガス濃度を測定
し、このガス濃度の測定結果に基づいて、水平面内での
等濃度線図を描き、この等濃度線図の中の濃度が高い場
所を漏洩場所と判断する。このようにして前述の上下の
縦平面内でのガス濃度分布に代えて、水平面内でのガス
濃度分布を知ることができ、容易に、しかも正確にガス
の漏洩場所の検出を行うことができる。Further, according to the present invention, in each of a plurality of excavation holes formed in the soil, a gas concentration at a measurement location having the same depth is measured, and based on the measurement result of the gas concentration, an equal concentration in a horizontal plane is measured. A line is drawn, and a place having a high concentration in the isodensity map is determined as a leakage place. In this way, the gas concentration distribution in the horizontal plane can be known instead of the gas concentration distribution in the upper and lower vertical planes described above, and the location of gas leakage can be easily and accurately detected. .
さらに本発明に従えば、細長い支持部材、たとえば筒
体などに、その長手方向に間隔をあけて複数のガス濃度
検出素子を設け、この支持部材を、複数の各掘削孔内に
挿入して、各掘削孔内の上下方向のガス濃度を測定し、
その掘削孔の場所は、たとえばキーボードなどのような
入力手段によつて作業者が入力するようにしてもよく、
こうして得られるガス濃度検出素子と入力手段からの出
力とに基づいて、縦の平面内での等濃度線図を作成し、
陰極線管もしくは液晶を用いた目視表示手段によつて、
または記録紙に印字をするプリンタなどによつて、出力
表示する。こうして得られた等濃度線図によつて、ガス
の漏洩場所を容易に検出することが可能となる。Furthermore, according to the present invention, an elongated support member, for example, a cylindrical body, is provided with a plurality of gas concentration detection elements at intervals in the longitudinal direction, and the support member is inserted into each of the plurality of drilling holes, Measure the vertical gas concentration in each borehole,
The location of the excavation hole may be input by an operator using input means such as a keyboard.
Based on the gas concentration detection element thus obtained and the output from the input means, create an isoconcentration diagram in a vertical plane,
By visual display means using a cathode ray tube or liquid crystal,
Alternatively, the output is displayed by a printer or the like that prints on recording paper. From the isoconcentration diagram obtained in this way, it is possible to easily detect the location of gas leakage.
実施例 第１図は本発明の一実施例の斜視図であり、第２図は
その実施例の断面図である。土壌８にはたとえば都市ガ
スなどのガスを輸送する管９が埋設されている。この管
９のガス漏洩場所10を検出するために、第３図にその平
面図が示されるように、管９の直上で、管９の長手方向
に沿つてたとえば約1mの間隔をあけて複数の掘削孔11を
形成する。掘削孔11内には、細長い剛性の筒状支持部材
12を挿入する。この支持部材12内には、支持部材12の長
手方向に間隔をあけて複数（この実施例では３）のガス
濃度検出素子13,14,15が設けられている。各ガス濃度検
出素子13,14,15によつて、各掘削孔11毎にガス濃度を測
定する。FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a sectional view of the embodiment. A pipe 9 for transporting gas such as city gas is buried in the soil 8. In order to detect the gas leak site 10 of the pipe 9, as shown in the plan view of FIG. 3, a plurality of pipes are provided immediately above the pipe 9 at intervals of, for example, about 1 m along the longitudinal direction of the pipe 9. The excavation hole 11 is formed. An elongated rigid cylindrical support member is provided in the borehole 11.
Insert 12 In the support member 12, a plurality (three in this embodiment) of gas concentration detecting elements 13, 14, 15 are provided at intervals in the longitudinal direction of the support member 12. The gas concentration is measured for each drilling hole 11 by each of the gas concentration detecting elements 13, 14, and 15.
各検出素子13,14,15は、掘削孔11において、地表から
たとえば30cm、50cmおよび70cmの各深さ位置で、ガス濃
度をそれぞれ測定する。各掘削孔11毎の検出素子13,14,
15による上下方向の測定場所は、第４図において×印で
示され、かつ参照符16,17,18でそれぞれ示されている。Each of the detection elements 13, 14, and 15 measures a gas concentration at the depth of, for example, 30 cm, 50 cm, and 70 cm from the surface of the ground in the excavation hole 11. Detection elements 13, 14, for each drilling hole 11
The vertical measurement locations according to 15 are indicated by crosses in FIG. 4 and by the reference numbers 16, 17, 18 respectively.
第５図は、第１図に示されている実施例の電気的構成
を示すブロツク図である。検出素子13,14,15からのガス
濃度を表す電気信号は、マイクロコンピユータなどによ
つて実現される処理回路19に入力される。処理回路19に
は、キーボードなどの入力手段20が設けられる。この入
力手段20によつて、支持部材12を挿入してガス濃度を測
定する掘削孔11の各場所を、作業者が入力することがで
きる。この処理回路19には、第４図に示される×印で示
される各ガス濃度測定場所毎の測定されたガス濃度に基
づいて、縦の平面内での等濃度の場所を線で結んで等濃
度線図を作成するためのプログラムをストアするメモリ
21が備えられる。またこのガス濃度の測定値および作成
された等濃度線図をストアするためのフロツピイデイス
クなどのメモリ22が備えられる。処理回路19において得
られた等濃度線図は、陰極線管または液晶などの目視表
示手段23によつて目視表示され、またプリンタ24によつ
て記録紙25に印字される。目視表示手段23は、たとえば
陰極線管または液晶を用いた構成であつてもよい。FIG. 5 is a block diagram showing the electrical configuration of the embodiment shown in FIG. The electric signals representing the gas concentrations from the detecting elements 13, 14, 15 are input to a processing circuit 19 realized by a microcomputer or the like. The processing circuit 19 is provided with input means 20 such as a keyboard. By means of this input means 20, the operator can input each location of the drilling hole 11 where the gas concentration is measured by inserting the support member 12. In this processing circuit 19, based on the gas concentration measured at each gas concentration measurement location indicated by the crosses shown in FIG. 4, equal concentration locations in a vertical plane are connected by lines. Memory for storing a program for creating density maps
21 are provided. Further, a memory 22 such as a floppy disk for storing the measured value of the gas concentration and the created isoconcentration diagram is provided. The isodensity diagram obtained in the processing circuit 19 is visually displayed by a visual display means 23 such as a cathode ray tube or a liquid crystal, and is printed on a recording paper 25 by a printer 24. The visual display means 23 may have a configuration using, for example, a cathode ray tube or liquid crystal.
第６図は、処理回路19の動作を説明するためのフロー
チヤートである。ステツプn1からステツプn2に移り、各
掘削孔11上下方向のガス濃度を、検出素子13,14,15によ
つて測定する。ステツプn3では、この支持部材12が挿入
されてガス濃度を測定する掘削孔11の測定場所が入力手
段20によつて入力されることによつて、その測定場所
と、検出素子13,14,15によつて測定されたガス濃度とを
対応させて、メモリ26にストアする。ステツプn4では、
プログラム21の実行によつて、縦の平面内での等濃度線
図の作成を行い、ステツプn5では、その作成された等濃
度線図を、目視表示手段23およびプリンタ24によつて出
力表示する。FIG. 6 is a flowchart for explaining the operation of the processing circuit 19. The process proceeds from step n1 to step n2, and the gas concentration in the up and down direction of each excavation hole 11 is measured by the detection elements 13, 14, and 15. In step n3, the measurement location of the drilling hole 11 for measuring the gas concentration by inserting the support member 12 is inputted by the input means 20, and the measurement location and the detection elements 13, 14, 15 are detected. Is stored in the memory 26 in correspondence with the gas concentration measured by In step n4,
By executing the program 21, an isodensity map is created in a vertical plane, and in step n5, the created isodensity map is output and displayed by the visual display means 23 and the printer 24. .
掘削孔11の軸線が鉛直であるとき、等濃度線図は鉛直
面内で描かれるけれども掘削孔11の軸線は鉛直でなくて
もよい。When the axis of the borehole 11 is vertical, the isodensitogram is drawn in a vertical plane, but the axis of the borehole 11 may not be vertical.
こうして得られる濃度線図は、第７図（１）に示され
るとおりである。ガス濃度が等しいことを表す線27のう
ち、高濃度の場所3aを、ガスの漏洩場所と判断する。The density diagram obtained in this way is as shown in FIG. 7 (1). Among the lines 27 indicating that the gas concentrations are equal, the place 3a having a high concentration is determined as a gas leakage place.
等濃度線図はまた、第７図（２）に示されるようにし
て得られることもある。ガス濃度が等しい線28は、１つ
の地中埋設管９だけでなく、その他の地中埋設管29に関
連してもまた形成される。先行技術では、このようにガ
スを輸送する地中埋設管9,29が複数、設けられていると
きには、ガスの漏洩場所の検出は極めて困難である。本
発明では、第７図（２）に示されるように、縦の平面図
での等濃度線図を描くことによつて、漏洩場所3aを容易
に検出することができる。The isodensity diagram may also be obtained as shown in FIG. 7 (2). Lines 28 of equal gas concentration are formed not only in connection with one underground pipe 9 but also in relation to the other underground pipe 29. In the prior art, when a plurality of underground pipes 9 and 29 for transporting gas are provided, it is extremely difficult to detect a gas leak location. In the present invention, as shown in FIG. 7 (2), the leakage site 3a can be easily detected by drawing an isodensity diagram in a vertical plan view.
第８図は本発明の他の実施例の断面図である。この実
施例は前述の実施例に類似し、対応する部分には同一の
参照符を付す。この実施例では、複数の各掘削孔11毎
に、検出部材12が個別的に挿入され、各検出部材12に
は、前述の実施例と同様に、ガス濃度検出素子13,14,15
がそれぞれ設けられる。このような構成によれば、複数
の各掘削孔11内における上下方向のガス濃度の分布を、
一挙に知ることができ、作業性が良好である。FIG. 8 is a sectional view of another embodiment of the present invention. This embodiment is similar to the previous embodiment, and corresponding parts are denoted by the same reference numerals. In this embodiment, a detecting member 12 is individually inserted for each of the plurality of drill holes 11, and each of the detecting members 12 has a gas concentration detecting element 13, 14, 15 similarly to the above-described embodiment.
Are respectively provided. According to such a configuration, the distribution of the gas concentration in the vertical direction in each of the plurality of drill holes 11 is
It can be known all at once, and the workability is good.
支持部材12は、各掘削孔11において同一長さだけ挿入
され、したがつて各掘削孔における検出素子13,14,15の
上下方向の位置は同一である。本発明の他の実施例とし
て、支持部材12の各掘削孔11への挿入深さが変化され、
その深さ位置に対応して、ガス濃度を測定して、等濃度
線図を描くようにしてもよい。The support member 12 is inserted by the same length in each of the drill holes 11, so that the vertical position of the detection elements 13, 14, 15 in each of the drill holes is the same. As another embodiment of the present invention, the insertion depth of the support member 12 into each of the drill holes 11 is changed,
The gas concentration may be measured corresponding to the depth position, and an isoconcentration diagram may be drawn.
第９図は、本発明の他の実施例の斜視図である。この
実施例では、土壌８に埋設されているガス輸送を行う管
９は、たとえば第10図にその平面が示されるように、道
路32に埋設されており、この管９の直上に掘削孔33を形
成するとともに、この近傍にもまた掘削孔34を形成す
る。参照符35は道路と民地との境界を示す。掘削孔33に
は、筒状の細長い支持部材36が挿入され、この支持部材
36の端部付近には、ガス濃度検出素子37が取付けられ、
ガス濃度を検出することができる。この他の構成は、前
述の実施例と同様である。支持棒36を各掘削孔33,34内
に挿入して、同一深さの測定場所におけるガス濃度を測
定する。この測定結果に基づいて、処理回路19では、第
11図に示されるように、水平面内での等濃度の場所を線
で結んだ等濃度線図を描き、このようにして、水平面内
でのガス濃度の分布を知ることができる。この等濃度線
図の中の濃度が高い場所38を、管９のガスの漏洩場所と
判断する。FIG. 9 is a perspective view of another embodiment of the present invention. In this embodiment, the gas transporting pipe 9 buried in the soil 8 is buried in a road 32 as shown in the plan view of FIG. And a drill hole 34 is also formed in the vicinity. Reference numeral 35 indicates a boundary between a road and a private land. A tubular elongated support member 36 is inserted into the borehole 33, and the support member
A gas concentration detection element 37 is attached near the end of 36,
Gas concentration can be detected. Other configurations are the same as those of the above-described embodiment. The support rod 36 is inserted into each of the excavation holes 33 and 34, and the gas concentration at the measurement location at the same depth is measured. Based on this measurement result, the processing circuit 19
As shown in FIG. 11, an isoconcentration diagram is drawn by connecting lines of equal concentration in the horizontal plane with a line, and thus the distribution of the gas concentration in the horizontal plane can be known. A place 38 having a high concentration in the isoconcentration diagram is determined as a place where the gas in the pipe 9 leaks.
本発明は、地中埋設管だけでなく、地中に埋設された
その他のの物体からのガスの漏洩場所の検出を行うため
にもまた実施することができる。The present invention can also be practiced to detect the location of gas leaks from underground pipes as well as other objects buried underground.
発明の効果 以上にように本発明によれば、土壌中に複数の掘削孔
を形成し、各掘削孔内におけるガス濃度を測定し、縦の
平面内での等濃度線図、または水平面内での等濃度線図
を描き、これらの等濃度線図の中の濃度が高い場所を、
漏洩場所と判断するようにしたので、容易に、しかも正
確にガスの漏洩場所の検出を行うことができる。Effects of the Invention As described above, according to the present invention, a plurality of drilling holes are formed in soil, the gas concentration in each drilling hole is measured, and an isoconcentration diagram in a vertical plane, or in a horizontal plane, Draw an isodensity map of
Since it is determined that the gas is leaking, it is possible to easily and accurately detect the gas leaking location.
さらに本発明によれば、細長い支持部材に、その長手
方向に間隔をあけて複数のガス濃度検出素子を設け、こ
のような支持部材を、土壌に形成された掘削孔内に挿入
してその掘削孔内の上下方向のガス濃度検出素子に対応
する各測定場所におけるガス濃度を測定し、こうして縦
の平面内での等濃度線図を作成して出力表示するように
したので、こうして出力表示される等濃度線図を見て、
ガスの漏洩場所の検出を容易に、しかも正確に行うこと
ができる。Further, according to the present invention, a plurality of gas concentration detecting elements are provided on the elongated support member at intervals in the longitudinal direction, and such a support member is inserted into a drill hole formed in the soil to perform the excavation. The gas concentration at each measurement location corresponding to the gas concentration detection element in the vertical direction in the hole was measured, and an isoconcentration diagram in a vertical plane was created and output and displayed. Look at the isodensity diagram
It is possible to easily and accurately detect a gas leak location.
第１図は本発明の一実施例の斜視図、第２図は各掘削孔
11毎のガス濃度を測定する状態を示す断面図、第３図は
掘削孔11を示す平面図、第４図は各掘削孔11におけるガ
ス濃度測定場所を示す図、第５図はその実施例の電気的
構成を示すブロツク図、第６図は第５図の処理回路19の
動作を説明するためのフローチヤート、第７図は等濃度
線図を示す図、第８図は本発明の他の実施例の断面図、
第９図は本発明のさらに他の実施例の斜視図、第10図は
第９図に示される実施例によつてガス濃度が検出される
べき掘削孔33,34を示す平面図、第11図は第９図および
第10図の実施例によつて得られる水平面図での等濃度線
図を示す図、第12図は先行技術の断面図、第13図は第12
図に示される先行技術の測定結果を示すグラフである。 11,33,34……掘削孔、12……支持部材、13,14,15……ガ
ス濃度検出素子、19……処理回路、20……入力手段、23
……目視表示手段、24……プリンタFIG. 1 is a perspective view of one embodiment of the present invention, and FIG.
FIG. 3 is a cross-sectional view showing a state in which the gas concentration is measured for each of the holes 11, FIG. 3 is a plan view showing the borehole 11, FIG. 4 is a view showing a gas concentration measurement site in each borehole 11, and FIG. FIG. 6 is a flowchart for explaining the operation of the processing circuit 19 shown in FIG. 5, FIG. 7 is a diagram showing an isodensity diagram, and FIG. 8 is another diagram of the present invention. Sectional view of the embodiment of
FIG. 9 is a perspective view of still another embodiment of the present invention, FIG. 10 is a plan view showing drilling holes 33 and 34 in which gas concentration is to be detected according to the embodiment shown in FIG. 9, and FIG. FIG. 12 is a diagram showing an isodensity diagram in a horizontal plane view obtained by the embodiment of FIGS. 9 and 10, FIG. 12 is a sectional view of the prior art, and FIG.
5 is a graph showing measurement results of the prior art shown in the figure. 11, 33, 34 ... drill hole, 12 ... support member, 13, 14, 15 ... gas concentration detecting element, 19 ... processing circuit, 20 ... input means, 23
…… Visual display means, 24 …… Printer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 城 博幸 大阪府大阪市中央区平野町４丁目１番２ 号 大阪瓦斯株式会社内 (56)参考文献 特開 昭57−106837（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) G01M 3/00 - 3/40 ──────────────────────────────────────────────────続 き Continued on the front page (72) Hiroyuki Shiro, Inventor, Osaka Gas Co., Ltd. 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka (56) References JP-A-57-106837 (JP, A) ( 58) Field surveyed (Int. Cl. 6 , DB name) G01M 3/00-3/40
Claims (3)
濃度を測定し、 ガス濃度の測定結果に基づいて、縦の平面内での等濃度
の場所を線で結んだ等濃度線図を描き、この等濃度線図
の中の濃度が高い場所を、漏洩場所と判断することを特
徴とするガスの漏洩場所の検出方法。A plurality of excavation holes are formed in soil, gas concentrations at a plurality of measurement locations in a vertical direction in each excavation hole are measured, and a gas concentration is measured in a vertical plane based on a measurement result of the gas concentration. A method for detecting a gas leakage site, comprising drawing an isoconcentration diagram in which lines of equal concentration are connected by a line, and judging a region having a high concentration in the isoconcentration diagram as a leakage site.
定し、 ガス濃度の測定結果に基づいて、水平面内での等濃度の
場所を線で結んだ等濃度線図を描き、 この等濃度線図の中の濃度が高い場所を、漏洩場所と判
断することを特徴とするガスの漏洩場所の検出方法。2. A plurality of drilling holes are formed in the soil, the gas concentration at the same depth measurement location in each drilling hole is measured, and based on the measurement result of the gas concentration, an equal concentration in a horizontal plane is determined. A method for detecting a gas leakage location, comprising drawing an isoconcentration diagram connecting locations with lines, and determining a location having a high concentration in the isoconcentration diagram as a leakage location.
ス濃度検出素子と、 支持部材の挿入される土壌に形成された掘削孔の場所を
入力する入力手段と、 ガス濃度検出素子と入力手段との各出力に応答し、等濃
度の場所を線で結んだ等濃度線図を作成する手段と、 作成手段によつて作成された等濃度線図を出力表示する
手段とを含むことを特徴とするガスの漏洩場所の検出装
置。3. An elongated support member, a plurality of gas concentration detecting elements provided at intervals in the longitudinal direction of the support member, and input means for inputting a location of a drilling hole formed in the soil into which the support member is to be inserted. Means for creating an isoconcentration diagram in which equal concentration locations are connected by lines in response to each output of the gas concentration detecting element and the input means, and outputting the isoconcentration chart created by the creating means A display unit for displaying a gas leakage location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30184790A JP2944736B2 (en) | 1990-11-06 | 1990-11-06 | Method and apparatus for detecting gas leakage location |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30184790A JP2944736B2 (en) | 1990-11-06 | 1990-11-06 | Method and apparatus for detecting gas leakage location |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04174335A JPH04174335A (en) | 1992-06-22 |
| JP2944736B2 true JP2944736B2 (en) | 1999-09-06 |
Family
ID=17901878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30184790A Expired - Lifetime JP2944736B2 (en) | 1990-11-06 | 1990-11-06 | Method and apparatus for detecting gas leakage location |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2944736B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101453435B1 (en) * | 2012-12-28 | 2014-10-21 | 경북대학교 산학협력단 | landfill gas sensor system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3540737B2 (en) * | 2000-10-20 | 2004-07-07 | 鹿島建設株式会社 | Surface gas measuring device for ground |
| US7210336B1 (en) * | 2005-10-07 | 2007-05-01 | M-B-W Incorporated | Gas link leak evacuation and monitoring system |
| CN108119759A (en) * | 2017-12-06 | 2018-06-05 | 北京理工大学 | A kind of underground gas pipeline leakage point accurate positioning method and system |
| CN112447028A (en) * | 2019-08-29 | 2021-03-05 | 深圳市云海物联科技有限公司 | Alarm method, alarm system and sensor equipment |
| CN114413186B (en) * | 2022-03-29 | 2022-10-25 | 浙江大学 | Composite pipeline for hydrogen transportation and hydrogen leakage monitoring method |
| US11774044B1 (en) | 2022-03-29 | 2023-10-03 | Zhejiang University | Composite pipeline for transporting hydrogen and method for monitoring hydrogen leakage |
-
1990
- 1990-11-06 JP JP30184790A patent/JP2944736B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101453435B1 (en) * | 2012-12-28 | 2014-10-21 | 경북대학교 산학협력단 | landfill gas sensor system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04174335A (en) | 1992-06-22 |
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