JP2007263829A - Leakage monitoring method of co gas - Google Patents

Leakage monitoring method of co gas Download PDF

Info

Publication number
JP2007263829A
JP2007263829A JP2006090818A JP2006090818A JP2007263829A JP 2007263829 A JP2007263829 A JP 2007263829A JP 2006090818 A JP2006090818 A JP 2006090818A JP 2006090818 A JP2006090818 A JP 2006090818A JP 2007263829 A JP2007263829 A JP 2007263829A
Authority
JP
Japan
Prior art keywords
gas
infrared
image
leakage
monitoring
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
Application number
JP2006090818A
Other languages
Japanese (ja)
Inventor
Kiyoyoshi Suenaga
清佳 末長
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.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
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 JFE Steel Corp filed Critical JFE Steel Corp
Priority to JP2006090818A priority Critical patent/JP2007263829A/en
Publication of JP2007263829A publication Critical patent/JP2007263829A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leakage monitoring method of CO gas capable of safely monitoring leakage of the CO gas over a wide range. <P>SOLUTION: A monitoring object is imaged by an infrared camera 1A through an infrared filter 4A, having infrared transmission characteristics of a wavelength zone absorbed by CO gas, and the monitoring object is imaged by an infrared camera 1B through an infrared filter 4B, having an infrared transmission characteristic of a wavelength zone that is not absorbed by CO gas. Then, two images acquired by the infrared cameras 1A, 1B are composited by an image compositing device 2, and the composited image is reflected on a monitor television 3, to thereby monitor the leakage of CO gas. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、転炉ガス回収配管などのガス配管で発生するＣＯ（一酸化炭素）ガスの漏洩を監視する方法に関する。   The present invention relates to a method for monitoring leakage of CO (carbon monoxide) gas generated in a gas pipe such as a converter gas recovery pipe.

従来、ＣＯガスの漏洩を検出する方法としては、特許文献１及び２に記載のように、定電位電解式センサ、接触燃焼式センサなどのＣＯセンサを用いてＣＯガスの漏洩を直接的に検出する方法や、漏洩時に生じる漏洩音を超音波センサで検出してＣＯガスの漏洩を間接的に検出する方法などがある。
しかしながら、上述した前者の方法は、ＣＯガスの漏洩箇所が高所である場合やＣＯセンサの設置場所から離れている場合には、漏洩したＣＯガスをＣＯセンサによって検出することが難しいという問題がある。また、漏洩したＣＯガスを検出できたとしても漏洩点までは把握できないため、ＣＯガスの漏洩点を見つけ出すためには、エアーラインマスクなどを装備して漏洩点を発見しなければならないという問題もある。さらに、老朽化したガス配管からＣＯガスが漏洩した場合には、漏洩点の発見に長時間を要するという問題もある。 Conventionally, as a method for detecting CO gas leakage, as described in Patent Documents 1 and 2, CO gas leakage is directly detected using a CO sensor such as a constant potential electrolytic sensor or a catalytic combustion sensor. And a method of indirectly detecting CO gas leakage by detecting a leakage sound generated at the time of leakage with an ultrasonic sensor.
However, the former method described above has a problem that it is difficult to detect the leaked CO gas by the CO sensor when the CO gas leak location is high or away from the CO sensor installation location. is there. In addition, even if the leaked CO gas can be detected, it is impossible to grasp the leak point. In order to find the leak point of CO gas, it is necessary to equip an air line mask or the like to find the leak point. is there. Furthermore, when CO gas leaks from an aging gas pipe, there is a problem that it takes a long time to find a leak point.

一方、後者の方法は、ＣＯガスが滞留している場合には、その場所を特定することが難しいという問題がある。また、ＣＯガスの漏洩がある程度の流速を伴わない場合には、ＣＯガスの漏洩を正確に検出することが難しいという問題もあり、さらに、ＣＯガス以外の流体（例えば、空気、蒸気など）の漏洩にも反応してしまうという問題もある。
特許第３２８９１３７号公報 特開２００２−８５０３４１号公報 On the other hand, the latter method has a problem that it is difficult to specify the location when CO gas stays. In addition, when the CO gas leakage does not involve a certain flow velocity, there is a problem that it is difficult to accurately detect the CO gas leakage, and further, the fluid other than the CO gas (for example, air, steam, etc.) There is also the problem of reacting to leaks.
Japanese Patent No. 3289137 JP 2002-850341 A

本発明は上述した問題点に着目してなされたものであり、その目的は、ＣＯガスの漏洩を広範囲に且つ安全に監視することのできるＣＯガスの漏洩監視方法を提供することにある。   The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a CO gas leakage monitoring method capable of safely monitoring CO gas leakage over a wide range.

上記課題を解決するために、本発明に係るＣＯガスの漏洩監視方法は、ＣＯガスに吸収される波長域の赤外線透過特性を有する赤外線フィルタを通じて監視対象物を赤外線カメラで撮像するとともに、前記ＣＯガスに吸収されない波長域の赤外線透過特性を有する赤外線フィルタを通じて監視対象物を赤外線カメラで撮像した後、前記赤外線カメラで得られた二つの画像を合成し、合成された画像をモニタ画面に表示してＣＯガスの漏洩を監視するようにしたことを特徴とする。   In order to solve the above-described problem, a CO gas leakage monitoring method according to the present invention images an object to be monitored with an infrared camera through an infrared filter having infrared transmission characteristics in a wavelength region absorbed by CO gas, and the CO gas After the object to be monitored is imaged with an infrared camera through an infrared filter having infrared transmission characteristics in a wavelength range that is not absorbed by gas, the two images obtained by the infrared camera are synthesized, and the synthesized image is displayed on the monitor screen. The CO gas leakage is monitored.

本発明に係るＣＯガスの漏洩監視方法によれば、転炉ガス回収配管などの監視対象物から漏洩したＣＯガスが目視可能な画像としてモニタ画面に映し出されるため、ＣＯガスの漏洩を広範囲に且つ安全に監視することができる。   According to the CO gas leakage monitoring method according to the present invention, the CO gas leaked from the monitoring object such as the converter gas recovery pipe is displayed on the monitor screen as a visible image. It can be monitored safely.

本発明に係るＣＯガスの漏洩監視方法を製鉄所の可燃性ガス回収配管モニタリングシステムに適用した第１の実施形態を図１に示す。同図において、符号１Ａ及び１Ｂは転炉ガス回収配管などの可燃性ガス回収配管をモニタリングするモニタカメラとしての赤外線カメラ、２は赤外線カメラ１Ａ，１Ｂで得られた画像を合成する画像合成装置、３は画像合成装置２で合成された画像を表示するモニタテレビであり、赤外線カメラ１Ａ，１Ｂのうち例えば赤外線カメラ１Ａには、ＣＯガスに吸収される波長域の赤外線透過特性（例えば中心通過波長域４．７０５μｍ、半値幅０．１７０μｍ）を有する赤外線フィルタ４Ａが図示しない対物レンズの前方に装着され、赤外線カメラ１Ｂには、ＣＯガスに吸収されない波長域の赤外線透過特性（例えば中心通過波長域３．４８０μｍ、半値幅０．１５２μｍ）を有する赤外線フィルタ４Ｂが図示しない対物レンズの前方に装着されている。なお、本実施例では、可燃性ガス回収配管をモニタリングする赤外線カメラとして、赤外線検出帯域が１．８〜５μｍの赤外線カメラを使用した。   FIG. 1 shows a first embodiment in which the CO gas leakage monitoring method according to the present invention is applied to a combustible gas recovery piping monitoring system of a steelworks. In the figure, reference numerals 1A and 1B are infrared cameras as monitor cameras for monitoring combustible gas recovery pipes such as converter gas recovery pipes, and 2 is an image synthesis apparatus for synthesizing images obtained by the infrared cameras 1A and 1B. Reference numeral 3 denotes a monitor television for displaying an image synthesized by the image synthesizing apparatus 2. Of the infrared cameras 1A and 1B, for example, the infrared camera 1A has an infrared transmission characteristic (for example, a center passing wavelength) absorbed in the CO gas. An infrared filter 4A having a region of 4.705 μm and a half-value width of 0.170 μm is mounted in front of an objective lens (not shown), and the infrared camera 1B has infrared transmission characteristics in a wavelength region that is not absorbed by CO gas (for example, a central passing wavelength region). (3.480 μm, half-width 0.152 μm) is mounted in front of an objective lens (not shown). That. In this example, an infrared camera having an infrared detection band of 1.8 to 5 μm was used as an infrared camera for monitoring the combustible gas recovery pipe.

このような構成において、監視対象物としての可燃性ガス回収配管からＣＯガスが漏洩すると、波長域が４．７μｍ付近の赤外線はＣＯガスに吸収されるため、赤外線フィルタ４Ａを通じて赤外線カメラ１Ａに入射する赤外線の入射線量が漏洩前より低減する。このため、赤外線カメラ１Ａから画像合成装置２に供給される画像は、ＣＯガス濃度の高い部分が暗い画像となる。   In such a configuration, when CO gas leaks from a combustible gas recovery pipe as a monitoring target, infrared light having a wavelength range of about 4.7 μm is absorbed by the CO gas, and therefore enters the infrared camera 1A through the infrared filter 4A. The incident dose of infrared rays to be reduced is less than before leakage. For this reason, the image supplied from the infrared camera 1 </ b> A to the image composition device 2 is a dark image where the CO gas concentration is high.

一方、赤外線フィルタ４Ｂを通じて赤外線カメラ１Ｂに入射する赤外線の入射線量は漏洩前の入射線量と殆ど変わらないため、赤外線カメラ１Ｂから画像合成装置２に供給される画像は、赤外線カメラ１Ａから画像合成装置２に供給される画像に比べて、全体的に明るい画像となる。
したがって、赤外線カメラ１Ａ，１Ｂで得られた二つの画像を画像合成装置２で合成し、合成された画像をモニタテレビ３に映し出すと、モニタテレビ３にはＣＯガスを目視可能な画像が映し出されるため、ＣＯガスの漏洩を広範囲に且つ安全に監視することができる。 On the other hand, since the incident dose of infrared rays incident on the infrared camera 1B through the infrared filter 4B is almost the same as the incident dose before leakage, the image supplied from the infrared camera 1B to the image synthesizer 2 is the image synthesizer from the infrared camera 1A. Compared with the image supplied to 2, the overall image is brighter.
Therefore, when the two images obtained by the infrared cameras 1A and 1B are synthesized by the image synthesizing device 2 and the synthesized image is displayed on the monitor television 3, an image capable of visually checking the CO gas is projected on the monitor television 3. Therefore, CO gas leakage can be monitored over a wide range and safely.

なお、赤外線カメラ１Ａ，１Ｂで得られた二つの画像を画像合成装置２で合成してＣＯガスを可視化する方法としては、例えば赤外線カメラ１Ｂで得られた画像から赤外線カメラ１Ａで得られた画像を減算合成してＣＯガスを可視化する方法や、赤外線カメラ１Ａで得られた画像の白と黒を反転させた後、赤外線カメラ１Ａで得られた画像に加算合成してＣＯガスを可視化する方法などを採用することができる。   As a method of visualizing CO gas by synthesizing two images obtained by the infrared cameras 1A and 1B by the image synthesis device 2, for example, an image obtained by the infrared camera 1A from an image obtained by the infrared camera 1B. The method of visualizing CO gas by subtracting and synthesizing, and the method of visualizing the CO gas by adding and synthesizing the image obtained by the infrared camera 1A after inverting the white and black of the image obtained by the infrared camera 1A Etc. can be adopted.

また、ＣＯガス像だけでは実体との照合が困難な場合は、図２に示す第２の実施形態のように、通常のビデオカメラ５で撮像された監視対象物の画像と画像合成装置２で合成された合成画像とを画像合成装置６に供給し、この画像合成装置６でモニタカメラ５からの画像に画像合成装置２からの画像を例えば赤色でカラーリングして重ね合せることで、実体イメージの中にＣＯガス濃度の高い部分を特徴付けて表示することができる。   In addition, when it is difficult to collate with the substance only by the CO gas image, the image of the monitoring object captured by the normal video camera 5 and the image synthesizing device 2 are used as in the second embodiment shown in FIG. The synthesized image is supplied to the image synthesizing device 6, and the image synthesizing device 6 superimposes the image from the image synthesizing device 2 on the image from the monitor camera 5 by, for example, coloring in red and superimposing it. A portion having a high CO gas concentration can be characterized and displayed in the.

上述した第１及び第２の実施形態では、二台の赤外線カメラを用いてＣＯガスの漏洩を監視するようにしたが、赤外線フィルタ４Ａ，４Ｂを交互に入れ替えながら一台の赤外線カメラで監視対象物を撮像し、撮像された監視対象物の画像を画像合成装置６に記憶させておいて合成するようにしてもよい。
また、上述した第１及び第２の実施形態では、製鉄所の可燃性ガス回収配管モニタリングシステムに本発明を適用した場合を例示したが、本発明はこれに限定されるものではなく、可燃性ガス回収配管以外のガス配管についても本発明を適用することが可能である。 In the first and second embodiments described above, leakage of CO gas is monitored using two infrared cameras. However, the monitoring target is monitored by one infrared camera while alternately replacing the infrared filters 4A and 4B. An object may be imaged, and the captured image of the monitored object may be stored in the image composition device 6 and synthesized.
Moreover, although the case where this invention was applied to the combustible gas collection | recovery piping monitoring system of a steelworks was illustrated in 1st and 2nd embodiment mentioned above, this invention is not limited to this, It is combustible. The present invention can also be applied to gas pipes other than the gas recovery pipe.

本発明に係るＣＯガスの漏洩監視方法を可燃性ガス回収配管モニタリングシステムに適用した第１の実施形態を示す図である。It is a figure which shows 1st Embodiment which applied the leakage monitoring method of the CO gas which concerns on this invention to the combustible gas collection | recovery piping monitoring system. 本発明に係るＣＯガスの漏洩監視方法を可燃性ガス回収配管モニタリングシステムに適用した第２の実施形態を示す図である。It is a figure which shows 2nd Embodiment which applied the leakage monitoring method of CO gas which concerns on this invention to the combustible gas collection | recovery piping monitoring system.

符号の説明Explanation of symbols

１Ａ，１Ｂ 赤外線カメラ
２，６ 画像合成装置
３ モニタテレビ
４Ａ，４Ｂ 赤外線フィルタ
５ ビデオカメラ 1A, 1B Infrared camera 2,6 Image composition device 3 Monitor TV 4A, 4B Infrared filter 5 Video camera

Claims (1)

ＣＯガスに吸収される波長域の赤外線透過特性を有する赤外線フィルタを通じて監視対象物を赤外線カメラで撮像するとともに、前記ＣＯガスに吸収されない波長域の赤外線透過特性を有する赤外線フィルタを通じて前記監視対象物を赤外線カメラで撮像した後、前記赤外線カメラで得られた二つの画像を合成し、合成された画像をモニタ画面に表示してＣＯガスの漏洩を監視するようにしたことを特徴とするＣＯガスの漏洩監視方法。   The monitoring object is imaged by an infrared camera through an infrared filter having an infrared transmission characteristic in a wavelength region absorbed by CO gas, and the monitoring object is passed through an infrared filter having an infrared transmission characteristic in a wavelength region not absorbed by CO gas. After capturing an image with an infrared camera, the two images obtained by the infrared camera are combined, and the combined image is displayed on a monitor screen to monitor the leakage of CO gas. Leakage monitoring method.
JP2006090818A 2006-03-29 2006-03-29 Leakage monitoring method of co gas Pending JP2007263829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006090818A JP2007263829A (en) 2006-03-29 2006-03-29 Leakage monitoring method of co gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006090818A JP2007263829A (en) 2006-03-29 2006-03-29 Leakage monitoring method of co gas

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2011207685A Division JP5333552B2 (en) 2011-09-22 2011-09-22 CO gas leakage monitoring method and CO gas leakage monitoring device

Publications (1)

Publication Number Publication Date
JP2007263829A true JP2007263829A (en) 2007-10-11

Family

ID=38636959

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006090818A Pending JP2007263829A (en) 2006-03-29 2006-03-29 Leakage monitoring method of co gas

Country Status (1)

Country Link
JP (1) JP2007263829A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010204024A (en) * 2009-03-05 2010-09-16 Jfe Steel Corp Apparatus and method for monitoring leakage of co-containing gas
JP2011237213A (en) * 2010-05-07 2011-11-24 Nec Corp Gas detection device and gas detection method
WO2018123196A1 (en) * 2016-12-27 2018-07-05 コニカミノルタ株式会社 Gas detection-use image processing device, gas detection-use image processing method, and gas detection-use image processing program

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63246638A (en) * 1987-04-01 1988-10-13 Tokyo Gas Co Ltd Method for wide area monitor of fluid leakage
JPH04328449A (en) * 1991-04-26 1992-11-17 Kao Corp Measuring method and apparatus for moisture
JP2000206042A (en) * 1999-01-18 2000-07-28 Mitsubishi Heavy Ind Ltd Gas detecting device and method
JP2001349829A (en) * 2000-06-06 2001-12-21 Hochiki Corp Gas monitoring device
JP2002171519A (en) * 2000-11-29 2002-06-14 Yuutekku:Kk Infrared ray color image forming device
JP2005024251A (en) * 2003-06-30 2005-01-27 Mitsubishi Heavy Ind Ltd System for monitoring gasifier

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63246638A (en) * 1987-04-01 1988-10-13 Tokyo Gas Co Ltd Method for wide area monitor of fluid leakage
JPH04328449A (en) * 1991-04-26 1992-11-17 Kao Corp Measuring method and apparatus for moisture
JP2000206042A (en) * 1999-01-18 2000-07-28 Mitsubishi Heavy Ind Ltd Gas detecting device and method
JP2001349829A (en) * 2000-06-06 2001-12-21 Hochiki Corp Gas monitoring device
JP2002171519A (en) * 2000-11-29 2002-06-14 Yuutekku:Kk Infrared ray color image forming device
JP2005024251A (en) * 2003-06-30 2005-01-27 Mitsubishi Heavy Ind Ltd System for monitoring gasifier

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010204024A (en) * 2009-03-05 2010-09-16 Jfe Steel Corp Apparatus and method for monitoring leakage of co-containing gas
JP2011237213A (en) * 2010-05-07 2011-11-24 Nec Corp Gas detection device and gas detection method
WO2018123196A1 (en) * 2016-12-27 2018-07-05 コニカミノルタ株式会社 Gas detection-use image processing device, gas detection-use image processing method, and gas detection-use image processing program
JP6504325B2 (en) * 2016-12-27 2019-04-24 コニカミノルタ株式会社 Image processing apparatus for gas detection, image processing method for gas detection, and image processing program for gas detection
US10991090B2 (en) 2016-12-27 2021-04-27 Konica Minolta, Inc. Gas detection-use image processing device, gas detection-use image processing method, and gas detection-use image processing program

Similar Documents

Publication Publication Date Title
JP5343054B2 (en) Gas leak detection device
KR101086142B1 (en) Method and System for Detecting Leakage by Using Camera Image
JP7246871B2 (en) Analysis device, system, analysis method, and program
JP4676867B2 (en) Anomaly detection device
RU2297726C2 (en) Insertion video complex for industrial furnaces and image processing system
US8094301B2 (en) Video and thermal imaging system for monitoring interiors of high temperature reaction vessels
JPH09178566A (en) Method and apparatus for displaying thermal image
JP2007263829A (en) Leakage monitoring method of co gas
JP2013036974A (en) Hydrogen flame visualization device and method
JP7056342B2 (en) Image processing device for gas detection, image processing method for gas detection, and image processing program for gas detection
JP5333552B2 (en) CO gas leakage monitoring method and CO gas leakage monitoring device
CN101598683A (en) Welding line detector of adapter tube and safety end of nuclear reactor pressure vessel and air bag component thereof
JP2007190060A (en) Endoscopic instrument
JPWO2018203479A1 (en) Image processing apparatus for gas detection, image processing method for gas detection, and image processing program for gas detection
JP5573340B2 (en) Gas detection device and gas detection method
KR20140038003A (en) Ship monitoring apparatus and ship monitoring method
JP2009139365A (en) Device and method for defect inspection of translucent material
JPH08292185A (en) Detection apparatus of leakage of waste liquid
WO2022070943A1 (en) Gas visualization image processing apparatus, gas visualization image processing method, and program
JP5375209B2 (en) CO-containing gas leakage monitoring device and CO-containing gas leakage monitoring method
KR200451226Y1 (en) Portable discharging UV analyzer
JP2004333285A (en) Examination method and device in conduit
JP2004219130A (en) Pipe inner wall face image photographing device
CN110446909B (en) Imaging system and ultraviolet light-emitting part determination method using same
JP2004294423A (en) Flame monitoring system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090213

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110214

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110222

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110414

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110726

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20111018