JPH0626971A - Method for detecting gas leak position - Google Patents

Method for detecting gas leak position

Info

Publication number
JPH0626971A
JPH0626971A JP18088992A JP18088992A JPH0626971A JP H0626971 A JPH0626971 A JP H0626971A JP 18088992 A JP18088992 A JP 18088992A JP 18088992 A JP18088992 A JP 18088992A JP H0626971 A JPH0626971 A JP H0626971A
Authority
JP
Japan
Prior art keywords
gas
distance
scanning
gas detector
concentration distribution
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.)
Granted
Application number
JP18088992A
Other languages
Japanese (ja)
Other versions
JP2996322B2 (en
Inventor
Kazumitsu Nukui
一光 温井
Takaaki Tanaka
孝明 田中
Masahiro Arakawa
正裕 荒川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Priority to JP4180889A priority Critical patent/JP2996322B2/en
Publication of JPH0626971A publication Critical patent/JPH0626971A/en
Application granted granted Critical
Publication of JP2996322B2 publication Critical patent/JP2996322B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To specify a leak position by arranging gas detectors having directivity in two positions having a distance, and horizontally rotating and scanning the respective gas detectors to measure the scanning angle of gas concentration rise. CONSTITUTION:Two gas detectors having directivity capable of horizontally rotating and scanning are arranged in positions having a distance L in a monitoring zone 1. When gas is leaked in positions A, B in the monitoring zone 1, gas concentration distribution to scanning angle can be obtained in each gas detector. Namely, a gas concentration distribution having a peak at an angle theta1 and a gas concentration distribution having respective peaks at angles theta2, theta2' are obtained. Thus, the position A can be specified with the distance L and the angles theta1, theta2 as data by means of triangulation, and the position B can be similarly specified with the distance L and the angles theta1, theta2' as data by means of triangulation.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は工場等に於ける配管や各
種装置等からのガスの漏洩位置の検出方法に関するもの
である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a gas leakage position from piping or various devices in a factory or the like.

【0002】[0002]

【従来の技術】工場等に於ける広い区域内の配管や各種
装置等からのガスの漏洩を検出するための従来の方法と
しては、概ね、漏洩したガス等を直接的に検知する方法
と、低温液化ガスや高温ガス等の場合には、ガスの漏洩
に伴う温度異常により間接的に検知する方法とがあり、
これらは次のようなものがある。 雰囲気中のガス濃度を検出するガス検知器または温
度計等のセンサーを、漏洩の可能性のある個所毎に設置
して、これらのセンサーにより検出する方法。 送
光装置から監視区域に向けてレーザー光や赤外線を発
し、監視区域を経た光線を受光装置により受けて、レー
ザー光の光量の変化や赤外線の吸収スペクトルによって
ガスの存在を検出して漏洩を検出する方法。 に示すレーザー光透過式ガス検知器ではなく、ガ
スによるレーザー光の反射によりガスの濃度を測定する
レーザー光反射式ガス検知器により監視区域を走査して
漏洩ガスを検出する方法。 赤外線検知器を監視対象物に沿って走行レールで移
動させることにより、監視対象物を走査して監視し、赤
外線検知器の出力に於ける温度異常により流体の漏洩を
検出する方法。(例えば走行レールを監視対象物の周囲
に適宜数立設して複数の赤外線検知器を監視対象物に沿
って垂直に移動させるものは実願昭59−45803号(実開
昭60−158298号)のマイクロフイルム、また走行レール
を監視対象物の周囲に螺旋状に設けて走行させるものは
実願昭59−45804(実開昭60−158299号)のマイクロフ
イルム参照)
2. Description of the Related Art As conventional methods for detecting gas leaks from pipes and various devices in a wide area of a factory or the like, there are generally methods for directly detecting leaked gas, In the case of low temperature liquefied gas or high temperature gas, there is a method of indirectly detecting the temperature abnormality due to gas leakage.
These are as follows. A method in which a sensor such as a gas detector or thermometer that detects the gas concentration in the atmosphere is installed at each location where there is a possibility of leakage, and detection is performed with these sensors. Laser light or infrared rays are emitted from the light transmitting device toward the monitoring area, and the light beam that passes through the monitoring area is received by the light receiving device, and the presence of gas is detected by detecting the change in the light amount of the laser light and the absorption spectrum of infrared rays and detecting leakage. how to. A method for detecting leak gas by scanning a monitoring area with a laser light reflection type gas detector that measures the concentration of gas by reflection of laser light by the gas instead of the laser light transmission type gas detector shown in. A method of detecting a fluid leak by moving an infrared detector along a monitored object along a traveling rail to scan and monitor the monitored object and detect a temperature abnormality in the output of the infrared detector. (For example, in a case where a plurality of traveling rails are installed upright around an object to be monitored and a plurality of infrared detectors are moved vertically along the object to be monitored, there is a Japanese Patent Application No. 59-45803 (No. Sho 60-158298). ), Or the one in which traveling rails are installed spirally around the object to be monitored, for traveling, refer to Japanese Patent Application No. 59-45804 (No. Sho 60-158299).

【0003】[0003]

【発明が解決しようとする課題】の方法では多大な初
期費用を必要とし、またそれらの保守に於いても多大な
費用と人員が必要であるという問題点に加えて、予測で
きない個所からの低温流体の漏洩には対応できないとい
う根本的欠陥があり、かかる欠陥は、センサーの数を多
くすれば解決できるというものではない。の方法では
監視区域を隔てて送、受光装置または反射鏡を設置しな
ければならないことに加えて、かかる方法は本質的に、
漏洩している個所を含む方向を検出するものであって、
漏洩位置を特定するには、送、受光装置の対を2次元的
に多数設けたり、走査するための装置の移動手段を必要
とし、またこの方法でも前述したようにセンサーを漏洩
の予測される個所に設置する場合と同様の根本的欠陥が
ある。の方法は、の方法と同様に、本質的に、漏洩
している位置を含む方向を検出するものであって、漏洩
位置を特定することはできず、また同一方向の複数個所
に漏洩個所があったとしてもこれらを区別することはで
きない。の方法では、監視対象物が大きい場合や監視
対象区域が広い場合に大掛かりとなってしまう。本発明
は以上の課題を解決することを目的とするもので、指向
性を有するガス検知器を合理的に利用することにより監
視区域内のガスの漏洩を、その位置と共に検出し得る方
法を提供するものである。
In addition to the problem that the method of the invention requires a large amount of initial cost and also requires a large amount of cost and personnel for the maintenance thereof, the low temperature from an unpredictable point is required. There is a fundamental defect that fluid leaks cannot be dealt with, and such a defect cannot be solved by increasing the number of sensors. In addition to requiring the installation of light-receiving devices or reflectors over the surveillance area, the method of
It detects the direction including the leaking point,
In order to specify the leak position, a large number of pairs of light-transmitting and light-receiving devices are provided in a two-dimensional manner, or a moving means of the device is required for scanning, and this method also predicts the leak of the sensor as described above. It has the same fundamental flaws as the local installation. Similar to the method, the method of (1) essentially detects the direction including the leaking position, and cannot specify the leaking position, and there are several leaking points in the same direction. Even if they exist, they cannot be distinguished. In the method of (1), it becomes a large scale when the monitored object is large or the monitored area is large. An object of the present invention is to solve the above problems, and to provide a method capable of detecting gas leakage in a monitored area together with its position by rationally utilizing a directional gas detector. To do.

【0004】[0004]

【課題を解決するための手段】上述した課題を解決する
ために、本発明では、指向性を有するガス検知器を距離
を隔てた少なくとも2地点に位置させ、夫々のガス検知
器を横方向に回転走査することにより、夫々の走査角度
に対する対象区域のガス濃度分布を測定し、測定したガ
ス濃度分布中の濃度上昇個所に対応する夫々の走査角度
から対象区域中のガス漏洩位置を検出する方法を提案す
る。
In order to solve the above-mentioned problems, in the present invention, gas detectors having directivity are positioned at at least two points separated by a distance, and the respective gas detectors are laterally arranged. A method of measuring the gas concentration distribution in the target area for each scanning angle by rotating and scanning, and detecting the gas leakage position in the target area from each scanning angle corresponding to the concentration increasing point in the measured gas concentration distribution. To propose.

【0005】そして本発明は、以上の方法に於いて、ガ
ス検知器は、距離を隔てた地点に固定的に設置したり、
移動可能に構成して、移動により距離を隔てた地点に位
置させることを提案する。
The present invention is the method described above, wherein the gas detector is fixedly installed at a point separated by a distance,
It is proposed that they be configured so that they can move and that they are located at points separated by movement.

【0006】そして本発明は、以上の方法を適用するガ
ス検知器として、レーザー光反射式ガス検知器を利用す
ることを提案する。
The present invention proposes to utilize a laser light reflection type gas detector as the gas detector to which the above method is applied.

【0007】[0007]

【作用】夫々のガス検知器を横方向に回転走査すること
により、夫々の走査角度に対する対象区域のガス濃度分
布を測定することできる。従って対象区域内の濃度上昇
個所を方向として、即ちガス検知器の走査角度としてと
らえることができる。
By rotating and scanning each gas detector in the lateral direction, it is possible to measure the gas concentration distribution in the target area with respect to each scanning angle. Therefore, the concentration increasing point in the target area can be regarded as the direction, that is, the scanning angle of the gas detector.

【0008】これらの測定を、距離を隔てた少なくとも
2地点に於いて行えば、この距離と、夫々の地点のガス
検知器に於ける濃度上昇個所に対応する走査角度とか
ら、三角測量の手法を用いて、濃度上昇個所の位置、即
ちガス漏洩位置を求めることができる。
If these measurements are carried out at at least two points separated by a distance, the method of triangulation from this distance and the scanning angle corresponding to the concentration rising point in the gas detector at each point. Can be used to find the position of the concentration increasing point, that is, the gas leakage position.

【0009】このように最少2地点に於ける測定によ
り、ガス漏洩位置を求めることができるのであるが、よ
り多くの地点に於いて測定を行うことにより、対象個所
の濃度分布を得ることもできる。
As described above, the gas leakage position can be obtained by the measurement at the minimum two points, but the concentration distribution at the target point can also be obtained by performing the measurement at more points. .

【0010】ガス検知器は、以上の方法を適用するにあ
たり、距離を隔てた地点に固定的に設置したり、移動可
能に構成して、移動により距離を隔てた地点に位置させ
ることができる。
In applying the above method, the gas detector can be fixedly installed at a point separated by a distance, or can be configured to be movable so that it can be positioned at a point separated by a movement.

【0011】また以上の方法を適用するガス検知器とし
ては、レーザー光反射式ガス検知器を利用することがで
きる。
As a gas detector to which the above method is applied, a laser light reflection type gas detector can be used.

【0012】[0012]

【実施例】次に本発明の実施例を図について説明する。
図1は本発明の検出方法を適用した実施例を平面図とし
て表したもので、図中二点鎖線で囲んだ部分は監視対象
区域1を便宜的に示すものである。この対象区域1内ま
たは対象区域1外の、距離Lを隔てた2地点の夫々にガ
ス検知器2a,2bを設置している。そしてこれらのガ
ス検知器2a,2bは横方向に回転走査する構成として
いる。このガス検知器2a,2bは、指向性を有するも
ので、例えば、同軸または若干距離を隔てて送光、受光
部を一体に構成したセンサ部を備え、送光部からレーザ
ー光を発射し、対象ガスにより反射してきたレーザー光
の光量を測定して、この対象ガスの濃度を測定する、い
わゆるレーザー光反射式ガス検知器を利用することがで
きる。
Embodiments of the present invention will now be described with reference to the drawings.
FIG. 1 is a plan view showing an embodiment to which the detection method of the present invention is applied, and a portion surrounded by an alternate long and two short dashes line in the drawing shows a monitored area 1 for convenience. Gas detectors 2a and 2b are installed at two points separated by a distance L in the target area 1 or outside the target area 1, respectively. The gas detectors 2a and 2b are configured to rotate and scan in the lateral direction. The gas detectors 2a and 2b have directivity, and for example, are equipped with a sensor unit in which a light-transmitting unit and a light-receiving unit are integrally configured coaxially or with a slight distance from each other, and a laser beam is emitted from the light-transmitting unit. It is possible to use a so-called laser light reflection type gas detector that measures the amount of laser light reflected by the target gas and measures the concentration of the target gas.

【0013】以上の構成に於いて、夫々のガス検知器2
a,2bを横方向に回転走査して走査角度に対する対象
区域1のガス濃度分布を測定する。
In the above structure, each gas detector 2
The gas concentration distribution of the target area 1 with respect to the scanning angle is measured by rotationally scanning a and 2b in the lateral direction.

【0014】図1に示すように、いま監視区域1内の位
置A,Bに於いてガスの漏洩があるとした場合、図中左
側のガス検知器2aに於いては図2に示すような走査角
度に対するガス濃度分布、そして図中右側のガス検知器
2bに於いては、図3に示すような走査角度に対するガ
ス濃度分布を得ることができる。即ち、図2に於いては
角度θ1に於いてピークのあるガス濃度分布、図3に於
いては角度θ2,θ2’の夫々に於いてピークのあるガス
濃度分布が得られる。
As shown in FIG. 1, when it is assumed that gas is leaking at the positions A and B in the monitoring area 1, the gas detector 2a on the left side of the drawing is as shown in FIG. The gas concentration distribution with respect to the scanning angle, and the gas detector 2b on the right side in the figure, the gas concentration distribution with respect to the scanning angle as shown in FIG. 3 can be obtained. That is, the gas concentration distribution having a peak at the angle θ 1 is obtained in FIG. 2, and the gas concentration distribution having a peak at the angles θ 2 and θ 2 ′ is obtained in FIG.

【0015】従って、前記距離Lと角度θ1,θ2とをデ
ータとして三角測量の手法を用いて位置Aを特定するこ
とができ、同様に、前記距離Lと角度θ1,θ2’とをデ
ータとして三角測量の手法を用いて位置Bを特定するこ
とができる。
Therefore, the position A can be specified using the distance L and the angles θ 1 and θ 2 as data by using a triangulation method. Similarly, the distance L and the angles θ 1 and θ 2 ' The position B can be specified by using a triangulation method with the data as.

【0016】この実施例に示すように、本発明では、一
方側のガス検知器2aでは区別のできない2個所のガス
漏洩位置を他方側のガス検知器2bにより区別すること
ができ、そしてこれらの位置を特定することができるこ
とが分かる。
As shown in this embodiment, in the present invention, two gas leakage positions which cannot be distinguished by the gas detector 2a on one side can be distinguished by the gas detector 2b on the other side, and these gas leak positions can be distinguished. It turns out that the position can be specified.

【0017】このように以上の測定は、距離を隔てた少
なくとも2地点に於いて行えば、この距離と、夫々の地
点のガス検知器に於ける濃度上昇個所に対応する走査角
度とから、三角測量の手法を用いて、濃度上昇個所の位
置を求めることができるのであるが、より多くの地点に
於いて測定を行うことにより、対象個所の温度分布を得
ることもでき、これらを適宜の手法によりCRT等上に
3次元表示することもできる。
As described above, if the above measurement is carried out at at least two points separated by a distance, from this distance and the scanning angle corresponding to the concentration rising point in the gas detector at each point, a triangle is obtained. It is possible to obtain the position of the concentration rising point by using the surveying method, but it is also possible to obtain the temperature distribution of the target point by measuring at more points, and use the appropriate method. Can also be displayed three-dimensionally on a CRT or the like.

【0018】また以上のガス検知器は、以上の方法を適
用するにあたり、距離を隔てた地点に固定的に設置した
り、移動可能に構成して、移動により距離を隔てた地点
に位置させることができる。
In applying the above method, the gas detector described above may be fixedly installed at a position separated by a distance or configured to be movable so that the gas detector is positioned at a position separated by a movement. You can

【0019】[0019]

【発明の効果】本発明は以上の通りであるので、簡単な
構成で、ガスの漏洩を、その位置と共に検出することが
でき、それらに対して迅速に処置を行えるという効果が
ある。
Since the present invention is as described above, it is possible to detect a gas leak together with its position with a simple structure, and it is possible to promptly deal with them.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の方法を適用した一例を表した平面図で
ある。
FIG. 1 is a plan view showing an example in which a method of the present invention is applied.

【図2】図1の左側のガス検知器による測定結果を示す
説明図である。
FIG. 2 is an explanatory diagram showing a measurement result by a gas detector on the left side of FIG.

【図3】図1の右側のガス検知器による測定結果を示す
説明図である。
FIG. 3 is an explanatory diagram showing a measurement result by the gas detector on the right side of FIG. 1.

【符号の説明】[Explanation of symbols]

1 監視対象区域 2a,2b ガス検知器 A,B ガス漏洩位置 1 Monitoring target area 2a, 2b Gas detector A, B Gas leak position

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 指向性を有するガス検知器を距離を隔て
た少なくとも2地点に位置させ、夫々のガス検知器を横
方向に回転走査することにより、夫々の走査角度に対す
る対象区域のガス濃度分布を測定し、測定したガス濃度
分布中の濃度上昇個所に対応する夫々の走査角度から対
象区域中のガス漏洩位置を検出することを特徴とするガ
ス漏洩位置の検出方法
1. A gas concentration distribution in a target area for each scanning angle by locating directional gas detectors at at least two points separated by a distance and rotating and scanning each gas detector laterally. And a gas leakage position in the target area is detected from the respective scanning angles corresponding to the concentration rising points in the measured gas concentration distribution.
【請求項2】 請求項1のガス検知器は、距離を隔てた
地点に固定的に設置することを特徴とするガス漏洩位置
の検出方法
2. The method for detecting a gas leakage position, wherein the gas detector according to claim 1 is fixedly installed at points separated by a distance.
【請求項3】 請求項1のガス検知器は、移動可能に構
成して、移動により距離を隔てた地点に位置させること
を特徴とするガス漏洩位置の検出方法
3. A method for detecting a gas leakage position, characterized in that the gas detector of claim 1 is configured to be movable and is positioned at a point separated by the movement.
【請求項4】 請求項1〜3のガス検知器は、レーザー
光反射式ガス検知器であることを特徴とするガス漏洩位
置の検出方法
4. The method for detecting a gas leakage position according to claim 1, wherein the gas detector is a laser light reflection type gas detector.
JP4180889A 1992-07-08 1992-07-08 Gas leak position detection method Expired - Fee Related JP2996322B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4180889A JP2996322B2 (en) 1992-07-08 1992-07-08 Gas leak position detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4180889A JP2996322B2 (en) 1992-07-08 1992-07-08 Gas leak position detection method

Publications (2)

Publication Number Publication Date
JPH0626971A true JPH0626971A (en) 1994-02-04
JP2996322B2 JP2996322B2 (en) 1999-12-27

Family

ID=16091106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4180889A Expired - Fee Related JP2996322B2 (en) 1992-07-08 1992-07-08 Gas leak position detection method

Country Status (1)

Country Link
JP (1) JP2996322B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117554329A (en) * 2023-11-01 2024-02-13 南京市锅炉压力容器检验研究院 Intelligent reconstruction method for concentration field of methane leakage area based on TDLAS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117554329A (en) * 2023-11-01 2024-02-13 南京市锅炉压力容器检验研究院 Intelligent reconstruction method for concentration field of methane leakage area based on TDLAS

Also Published As

Publication number Publication date
JP2996322B2 (en) 1999-12-27

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