JPH0552747U - Optical fiber gas sensor for measuring gas concentration in oil - Google Patents
Optical fiber gas sensor for measuring gas concentration in oilInfo
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- JPH0552747U JPH0552747U JP10391391U JP10391391U JPH0552747U JP H0552747 U JPH0552747 U JP H0552747U JP 10391391 U JP10391391 U JP 10391391U JP 10391391 U JP10391391 U JP 10391391U JP H0552747 U JPH0552747 U JP H0552747U
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Abstract
(57)【要約】
【目的】 絶縁油などに含まれているガスの濃度を光で
測定するコンパクトな光ファイバーガスセンサを提供す
る。
【構成】 外筒1と、その外筒内に同心的に配置されか
つ気液分離膜を備えた内筒2とからなる2重管構造であ
って、前記2重管の両端を環状の端板3a,3bで封止
して外筒1と内筒2の間にガス濃度測定用油が流入する
環状密閉空間4を形成した気液分離筒体部Aを、外筒7
と、その外筒内に同心的に配置された多孔質の内筒8と
から成る2重管構造であって、前記2重管の一端を環状
の端板9で封止して外筒7と内筒8の間に一端開口の環
状空間10を形成したセンサ外筒部Bの前記環状空間内
に封入したガス検知セルの前記センサ外筒部Bの内筒内
を光ファイバーから送られるガス濃度測定光の光路11
とした油中ガス濃度測定用光ファイバーガスセンサ。
(57) [Abstract] [Purpose] To provide a compact optical fiber gas sensor for measuring the concentration of gas contained in insulating oil by light. A double tube structure comprising an outer cylinder 1 and an inner cylinder 2 concentrically arranged in the outer cylinder and provided with a gas-liquid separation membrane, wherein both ends of the double tube are annular ends. The gas-liquid separating cylinder portion A, which is sealed by the plates 3a and 3b and has an annular closed space 4 into which the gas concentration measuring oil flows between the outer cylinder 1 and the inner cylinder 2, is
And a porous inner cylinder 8 concentrically arranged in the outer cylinder, which has a double tube structure. One end of the double tube is sealed with an annular end plate 9 to form an outer cylinder 7. Concentration of gas sent from the optical fiber through the inner cylinder of the sensor outer cylinder part B of the gas detection cell enclosed in the annular space of the sensor outer cylinder part B in which an annular space 10 having one end opening is formed between the inner cylinder 8 and the inner cylinder 8. Optical path 11 of measuring light
Optical fiber gas sensor for measuring gas concentration in oil.
Description
【0001】[0001]
本考案は、油中ガス濃度測定用光ファイバーガスセンサに関する。 The present invention relates to an optical fiber gas sensor for measuring gas concentration in oil.
【0002】[0002]
OFケーブルや油中変圧器に使用されている絶縁油は、熱劣化や高電圧放電な どを原因として、使用中にメタンガスやアセチレンガスなどの可燃性ガスが発生 する。これら可燃性ガス量を測定することにより、ケーブルや機器における絶縁 劣化の状態を監視することができるので、用いている絶縁油中の可燃性ガスの濃 度を測定することが必要になる。 Insulating oils used in OF cables and oil-in-water transformers generate combustible gases such as methane gas and acetylene gas during use due to thermal deterioration and high-voltage discharge. By measuring the amount of flammable gas, it is possible to monitor the state of insulation deterioration in cables and equipment, so it is necessary to measure the concentration of flammable gas in the insulating oil used.
【0003】 例えばOFケーブルの場合、OFケーブルの布設現場で、OFケーブルから多 量の絶縁油を採取したのち、その採取油を分析可能な別の場所に運び、そこで、 減圧吸引ポンプによって採取油から含有ガスを抽出し、その抽出ガスをガスクロ マトグラフィー装置で分離定量するという方法で絶縁油中の可燃性ガス濃度の測 定が行われてきた。しかしながら、この方法は、濃度測定に至るまでの作業が極 めて煩雑であり、長い時間と多大な努力を要するという問題がある。For example, in the case of an OF cable, after collecting a large amount of insulating oil from the OF cable at the installation site of the OF cable, the collected oil is transported to another place where it can be analyzed, and then the collected oil is collected by a vacuum suction pump. The concentration of combustible gas in insulating oil has been measured by extracting the contained gas from the gas and separating and quantifying the extracted gas with a gas chromatograph. However, this method has a problem in that the work up to the concentration measurement is extremely complicated and requires a long time and a great deal of effort.
【0004】 一方、メタンガスなどのガス検知センサとして、最近、光ファイバーを用いた 遠隔操作可能なガスセンサが提案されている。 このガスセンサでは、図4に示したように、遠く離れた場所に配置されている 光源13の光を光ファイバー14で伝送し、その光を、被測定ガスが導入されて いるガス検知セル15内を通過させる。ガス検知セル15内では、被測定ガスに よってその吸収波長の光が吸収される。On the other hand, as a gas detection sensor for methane gas or the like, a remotely operable gas sensor using an optical fiber has recently been proposed. In this gas sensor, as shown in FIG. 4, light from a light source 13 arranged at a distant place is transmitted through an optical fiber 14, and the light is transmitted through a gas detection cell 15 into which a gas to be measured is introduced. Let it pass. In the gas detection cell 15, the light having the absorption wavelength is absorbed by the gas to be measured.
【0005】 ガス検知セル15を透過した光を、干渉系20の干渉フィルタ21,21’に よって被測定ガスの吸収波長の光のみを透過するビームスプリッタ16と、被測 定ガスによる吸収がない波長の光だけを透過するビームスプリッタ17とにそれ ぞれ通す。そして、検出器18で両者の強度差を検出し、その検出信号を増幅器 19で増幅したのち、その増幅信号をコンピュータ22で取り出すか、プリンタ またはレコーダで記録する。A beam splitter 16 that transmits only the light having the absorption wavelength of the gas to be measured by the interference filters 21 and 21 ′ of the interference system 20, and the light that has passed through the gas detection cell 15 is not absorbed by the gas to be measured. The light beams pass through the beam splitter 17 that transmits only the wavelength light, respectively. Then, the detector 18 detects the intensity difference between the two, and the detected signal is amplified by the amplifier 19, and the amplified signal is taken out by the computer 22 or recorded by a printer or a recorder.
【0006】 この場合、ランバート・ベールの法則により、被測定ガスによる吸光度と被測 定ガス濃度とは比例関係にあるので、機械的または振動などによる光信号のブル を較正して得られた前記検出信号から被測定ガス濃度を測定することができる。In this case, according to Lambert-Beer's law, since the absorbance due to the gas to be measured and the concentration of the gas to be measured are in a proportional relationship, the above-mentioned value obtained by calibrating the bull of the optical signal due to mechanical or vibration is obtained. The measured gas concentration can be measured from the detection signal.
【0007】[0007]
ところで、OFケーブルや油中変圧器などの絶縁油の可燃性ガス濃度を測定す る際に、絶縁油から抽出した可燃性ガスを前記したようなガス検知セルに導入す れば、遠隔操作によって油中ガス濃度を測定することができるようになる。 この場合、可燃性ガスの抽出を従来と同じように絶縁油から減圧吸引で行うの では、検出手段が、従来のガスクロマトグラフィー装置から前記したガスセンサ に転換したのみであって、従来方法の課題を解決したとはいいがたい。 By the way, when measuring the combustible gas concentration of insulating oil such as OF cable and transformer in oil, if the combustible gas extracted from the insulating oil is introduced into the gas detection cell as described above, it can be operated remotely. It becomes possible to measure the gas concentration in oil. In this case, if the extraction of the flammable gas is performed by vacuum suction from the insulating oil as in the conventional case, only the detection means is changed from the conventional gas chromatography device to the above-mentioned gas sensor, and the conventional method has the problem. It is hard to say that we have solved
【0008】 本考案は、前記したような光ファイバーで遠隔操作が可能なガスセンサを用い て油中ガス濃度を測定するセンサであるが、センサそれ自体が絶縁油中から可燃 性ガスを分離することができ、そのため、全体が非常にコンパクトになって、O Fケーブルや油中変圧器などの布設現場に設置することができる油中ガス濃度測 定用光ファイバーガスセンサの提供を目的とする。The present invention is a sensor for measuring a gas concentration in oil by using a gas sensor that can be remotely controlled by an optical fiber as described above. The sensor itself can separate a combustible gas from insulating oil. Therefore, it is an object of the present invention to provide an optical fiber gas sensor for measuring the gas concentration in oil, which can be installed in the installation site such as OF cable and transformer in oil, etc., because the whole is very compact.
【0009】[0009]
上記した目的を達成するために、本考案においては、外筒と、その外筒内に同 心的に配置されかつ気液分離膜を備えた内筒とからなる2重管構造であって、前 記2重管の両端を環状の端板で封止して外筒と内筒の間にガス濃度測定用油が流 入する環状密閉空間を形成した気液分離筒体部Aを、外筒と、その外筒内に同心 的に配置された多孔質の内筒とから成る2重管構造であって、前記2重管の一端 を環状の端板で封止して外筒と内筒の間に一端開口の環状空間を形成したセンサ 外筒部Bの前記環状空間内に封入したガス検知セルの前記センサ外筒部の内筒内 を光ファイバーから送られるガス濃度測定光の光路としたことを特徴とする油中 ガス濃度測定用光ファイバーガスセンサが提供される。 In order to achieve the above-mentioned object, the present invention provides a double tube structure comprising an outer cylinder and an inner cylinder concentrically arranged in the outer cylinder and provided with a gas-liquid separation membrane, The gas-liquid separating cylinder body portion A, which is formed by sealing both ends of the double pipe with annular end plates to form an annular closed space in which the gas for measuring gas concentration flows, is formed between the outer cylinder and the inner cylinder. A double tube structure comprising a tube and a porous inner tube concentrically arranged in the outer tube, wherein one end of the double tube is sealed with an annular end plate to form an inner tube with the outer tube. An optical path of gas concentration measuring light sent from an optical fiber is provided in the inner cylinder of the sensor outer cylinder part of the gas detection cell enclosed in the annular space of the sensor outer cylinder part B in which an annular space with one end opening is formed between the cylinders. An optical fiber gas sensor for measuring a gas concentration in oil is provided.
【0010】[0010]
気液分離筒体部Aの環状密閉空間内に被測定ガスを含む絶縁油を導入すると、 被測定ガスは気液分離膜を透過してセンサ外筒部Bの内筒に達する。この内筒は 多孔質であるため、被測定ガスは内筒を通過して光ファイバーで伝達されてきた 測定光の光路(内筒の中)に達する。そして、ここで、被測定ガス濃度が測定光 によって測定される。 When the insulating oil containing the gas to be measured is introduced into the annular closed space of the gas-liquid separation cylinder portion A, the gas to be measured passes through the gas-liquid separation film and reaches the inner cylinder of the sensor outer cylinder portion B. Since this inner cylinder is porous, the gas to be measured reaches the optical path (inside the inner cylinder) of the measurement light transmitted through the inner cylinder through the optical fiber. Then, here, the measured gas concentration is measured by the measurement light.
【0011】 絶縁油から被測定ガスを抽出することは、気液分離筒体部Aの気液分離膜が行 うので、従来のような減圧吸引装置などは不要となり、センサを非常にコンパク トな形状にすることができる。Extracting the gas to be measured from the insulating oil is performed by the gas-liquid separation film of the gas-liquid separation cylinder A, so that a conventional vacuum suction device is unnecessary and the sensor is very compact. Can be made into any shape.
【0012】[0012]
以下に、添付図面に基づいて本考案のガスセンサの実施例を詳細に説明する。 図1は、本考案のガスセンサをの要部であるガス検知セルの一部切欠側面図で ある。ガス検知セルは、後述する気液分離筒体部Aがセンサ外筒部Bの後述する 環状空間10の中に封入された構造になっている。 Hereinafter, embodiments of the gas sensor of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a partially cutaway side view of a gas detection cell, which is an essential part of the gas sensor of the present invention. The gas detection cell has a structure in which a gas-liquid separation cylinder portion A described later is enclosed in an annular space 10 described later of the sensor outer cylinder portion B.
【0013】 まず、図2は本考案のガスセンサにおけるガス検知セルを構成する気液分離筒 体部Aの1例を示す斜視図である。 図1において、気液分離筒体部Aは外筒1とこの外筒1の中に同心的に配置さ れた内筒2との2重管構造になっている。そして、この2重管構造の両端は、環 状の端板3a,3bで封止されていて、外筒1と内筒2の間には環状密閉空間4 が筒体部Aの長手方向に亘って形成され、内筒2の内径部は気液分離筒体部Aの 長手方向を貫通する中空部5になっている。First, FIG. 2 is a perspective view showing an example of a gas-liquid separation cylinder portion A which constitutes a gas detection cell in the gas sensor of the present invention. In FIG. 1, the gas-liquid separating cylinder portion A has a double pipe structure including an outer cylinder 1 and an inner cylinder 2 concentrically arranged in the outer cylinder 1. Both ends of this double pipe structure are sealed by annular end plates 3a and 3b, and an annular closed space 4 is provided between the outer cylinder 1 and the inner cylinder 2 in the longitudinal direction of the cylindrical body portion A. An inner diameter portion of the inner cylinder 2 formed over the entire length is a hollow portion 5 penetrating in the longitudinal direction of the gas-liquid separating cylinder portion A.
【0014】 そして、一方の環状端板3bには、例えば2本の銅管6a,6bが接続されて 、この銅管6a(または6b)からガス濃度測定用の油が環状密閉空間4に流入 されてその環状密閉空間4を満たし、銅管6a(または6b)から流出できるよ うになっている。 ここで、外筒1や端板3a,3bは、例えば、銅板,真ちゅう板,ステンレス 鋼板などの金属板や、アクリル樹脂板,エポキシ樹脂板などの樹脂板で製造され ている。Then, for example, two copper pipes 6a and 6b are connected to the one annular end plate 3b, and oil for gas concentration measurement flows into the annular closed space 4 from the copper pipes 6a (or 6b). Thus, the annular closed space 4 is filled and can flow out from the copper pipe 6a (or 6b). Here, the outer cylinder 1 and the end plates 3a and 3b are made of, for example, a metal plate such as a copper plate, a brass plate, or a stainless steel plate, or a resin plate such as an acrylic resin plate or an epoxy resin plate.
【0015】 内筒2は、気液分離膜で構成され、補強効果や製造のしやすさのことを考える と、例えば金網などのメッシュ材で筒体を成形し、その筒体の表面に気液分離膜 を貼着したものであることが好ましい。 用いる気液分離膜は、耐油性に優れた材料から成り、環状密閉空間4に流入さ れた油からそれに溶解しているガス(例えば、水素,二酸化炭素,一酸化炭素, メタン,エタン,プロパン,エチレン,プロピレン,アセチレンなど)は透過す るが油は透過しない膜であれば何であってもよい。The inner cylinder 2 is composed of a gas-liquid separation membrane. Considering the reinforcing effect and the ease of manufacturing, the inner cylinder 2 is formed of a mesh material such as a wire mesh, and the inner surface of the inner cylinder 2 is covered with a gas. It is preferable that the liquid separation membrane is attached. The gas-liquid separation membrane used is made of a material having excellent oil resistance, and the gas that has dissolved in it from the oil that has flowed into the annular closed space 4 (for example, hydrogen, carbon dioxide, carbon monoxide, methane, ethane, propane). , Ethylene, propylene, acetylene, etc.) but not oil.
【0016】 このような気液分離膜としては、フッ素樹脂を主成分とするフィルム,セルロ ース系フィルム,ポリ塩化ビニリデン系フィルムなどをあげることができるが、 例えば耐油性が優れるということで厚み50〜500μm程度のフッ素樹脂を主 成分とするフィルムが好適である。 図3は本考案のガスセンサにおけるガス検知セルのセンサ外筒部Bの1例を示 す斜視図である。Examples of such a gas-liquid separation membrane include a film containing a fluororesin as a main component, a cellulose-based film, a polyvinylidene chloride-based film, and the like. A film whose main component is a fluororesin of about 50 to 500 μm is suitable. FIG. 3 is a perspective view showing an example of the sensor outer cylinder portion B of the gas detection cell in the gas sensor of the present invention.
【0017】 図3において、センサ外筒部Bは外筒7とこの外筒7の中に同心的に配置され た内筒8との2重管構造になっていて、その2重管の一方の端部は環状の端板9 で封じられている。 したがって、外筒7と内筒8の間には、一端が開口する環状空間10が形成さ れ、内筒8の内径部はセンサ外筒部Bの長手方向を貫通する中空部11になって いる。そして、この中空部11がガス濃度測定用の光の光路になる。In FIG. 3, the sensor outer cylinder portion B has a double pipe structure of an outer cylinder 7 and an inner cylinder 8 concentrically arranged in the outer cylinder 7, and one of the double tubes is The end portion of is closed by an annular end plate 9. Therefore, an annular space 10 having one end opened is formed between the outer cylinder 7 and the inner cylinder 8, and the inner diameter portion of the inner cylinder 8 is a hollow portion 11 penetrating in the longitudinal direction of the sensor outer cylinder portion B. There is. Then, this hollow portion 11 serves as an optical path of light for measuring gas concentration.
【0018】 ここで、外筒7,環状の端板9はいずれも気液分離筒体部Aの外筒1や端板3 a,3bと同じ材料で構成される。 内筒8は、例えば、金属製の金網,セラミックス多孔板などのような多孔質の 材料で構成され、全体に100μm〜1mm程の貫通孔が形成されている。 本考案のガスセンサにおけるガス検知セルは、上記したセンサ外筒部Bの環状 空間10の一端開口部から気液分離筒体部Aを環状空間10の中に挿入し、その 一端開口部で気液分離筒体部Aの油流入・流出管側を密封して、センサ外筒部B の中に気液分離筒体Aを封入して製造される。Here, both the outer cylinder 7 and the annular end plate 9 are made of the same material as the outer cylinder 1 and the end plates 3 a, 3 b of the gas-liquid separating cylinder portion A. The inner cylinder 8 is made of, for example, a porous material such as a metal wire mesh or a ceramic porous plate, and has a through hole of about 100 μm to 1 mm formed throughout. The gas detection cell in the gas sensor of the present invention is such that the gas-liquid separating cylinder portion A is inserted into the annular space 10 from one end opening portion of the annular space 10 of the sensor outer cylinder portion B described above, and the gas liquid separation is performed at the one end opening portion. It is manufactured by sealing the oil inflow / outflow pipe side of the separation cylinder portion A and enclosing the gas-liquid separation cylinder A in the sensor outer cylinder portion B 1.
【0019】 次に作用を説明する。 ガス検知セルの銅管6aからガス濃度測定用の油12を流入して気液分離筒体 部Aの環状密閉空間4内に充満させる。油中溶存ガスは気液分離筒体部Aの内筒 2を構成する気液分離膜によって分離されてセンサ外筒部Bの内筒8側に移動す る。Next, the operation will be described. Oil 12 for gas concentration measurement is introduced from the copper pipe 6a of the gas detection cell to fill the annular closed space 4 of the gas-liquid separation cylinder portion A. The gas dissolved in oil is separated by the gas-liquid separation film forming the inner cylinder 2 of the gas-liquid separation cylinder portion A and moves to the inner cylinder 8 side of the sensor outer cylinder portion B.
【0020】 そして、分離したガスは多孔質の内筒8を通過して、センサ外筒部Bの中空部 、すなわち光ファイバーから送られるガス濃度測定光の光路11内に満ちる。 この光路11には、図示しない光ファイバーによってガス濃度測定用の光が矢 印のように導入されているので、その吸光度から油中のガス濃度は測定される。 例えば、気液分離筒体部A,センサ外筒部Bの内筒,端板をいずれもFRP製 樹脂とし、気液分離膜を厚み100μmのフッ素樹脂フィルムとし、センサ外筒 部の内筒を平均孔径150μmの金属製金網として、全体の外径50mm.全体の 長さ300mmのガス検知セルを製造し、絶縁油中のアセチレン濃度を測定したと ころ、感度10ppmまで検知することができた。Then, the separated gas passes through the porous inner cylinder 8 and fills the hollow part of the sensor outer cylinder part B, that is, the optical path 11 of the gas concentration measuring light sent from the optical fiber. Since light for measuring gas concentration is introduced into the optical path 11 by an optical fiber (not shown) as shown by an arrow, the gas concentration in oil can be measured from its absorbance. For example, the gas-liquid separation cylinder A, the inner cylinder of the sensor outer cylinder B, and the end plates are all made of FRP resin, the gas-liquid separation film is a fluororesin film having a thickness of 100 μm, and the inner cylinder of the sensor outer cylinder is As a metal wire mesh with an average pore diameter of 150 μm, the overall outer diameter is 50 mm. When a gas detection cell with a total length of 300 mm was manufactured and the acetylene concentration in the insulating oil was measured, it was possible to detect up to a sensitivity of 10 ppm.
【0021】[0021]
以上の説明で明らかなように、本考案の油中ガス濃度測定用光ファイバーガス センサは、外筒と、その外筒内に同心的に配置されかつ気液分離膜を備えた内筒 とからなる2重管構造であって、前記2重管の両端を環状の端板で封止して外筒 と内筒の間にガス濃度測定用油が流入する環状密閉空間を形成した気液分離筒体 部Aを、外筒と、その外筒内に同心的に配置された多孔質の内筒とから成る2重 管構造であって、前記2重管の一端を環状の端板で封止して外筒と内筒の間に一 端開口の環状空間を形成したセンサ外筒部Bの前記環状空間内に封入したガス検 知セルの前記センサ外筒部の内筒内を光ファイバーから送られるガス濃度測定光 の光路としたことを特徴とするので、油中のガスを抽出するための装置を別に設 ける必要もなく全体がコンパクトになると同時に、遠隔地から光ファイバーによ って伝送される測定光によってガス濃度の測定が可能となり、その実用的価値は 大である。 As is apparent from the above description, the optical fiber gas sensor for measuring gas concentration in oil of the present invention comprises an outer cylinder and an inner cylinder concentrically arranged in the outer cylinder and having a gas-liquid separation membrane. A gas-liquid separation cylinder having a double pipe structure, in which both ends of the double pipe are sealed with annular end plates to form an annular closed space into which the gas for measuring gas concentration flows between an outer cylinder and an inner cylinder. The body A has a double tube structure including an outer cylinder and a porous inner cylinder concentrically arranged in the outer cylinder, and one end of the double tube is sealed with an annular end plate. Then, the inside of the inner cylinder of the sensor outer cylinder part of the gas detection cell enclosed in the annular space of the sensor outer cylinder part B having an annular space with one end opening formed between the outer cylinder and the inner cylinder is sent from the optical fiber. It is characterized in that it is used as the optical path of the gas concentration measurement light that is used, so there is no need to provide a separate device for extracting the gas in the oil. At the same time the body becomes compact, it is possible to measure the gas concentration by measuring light transmitted me by remotely to the optical fiber, its practical value is great.
【図1】本考案のガスセンサの要部であるガス検知セル
の1例を示す部分斜視図である。FIG. 1 is a partial perspective view showing an example of a gas detection cell which is a main part of a gas sensor of the present invention.
【図2】気液分離筒体部の例を示す斜視図である。FIG. 2 is a perspective view showing an example of a gas-liquid separating cylinder portion.
【図3】センサ外筒部の例を示す斜視図である。FIG. 3 is a perspective view showing an example of a sensor outer cylinder portion.
【図4】光ファイバーを用いたガス濃度検知システムを
示す概略図である。FIG. 4 is a schematic view showing a gas concentration detection system using an optical fiber.
A 気液分離筒体部 B センサ外筒部 1 気液分離筒体部Aの外筒 2 気液分離筒体部Aの内筒 3a,3b 気液分離筒体部Aの環状端板 4 気液分離筒体部Aの密閉環状空間 5 気液分離筒体部Aの中空部 6a,6b 銅管 7 センサ外筒部Bの外筒 8 センサ外筒部Bの内筒 9 センサ外筒部Bの環状端板 10 センサ外筒部Bの環状空間 11 光路(センサ外筒部Bの中空部) 12 油 A gas-liquid separation cylinder part B sensor outer cylinder part 1 outer cylinder of gas-liquid separation cylinder part A 2 inner cylinder of gas-liquid separation cylinder part A 3a, 3b annular end plate of gas-liquid separation cylinder part 4 gas Sealed annular space of liquid separation cylinder portion A 5 Hollow portion of gas-liquid separation cylinder portion A 6a, 6b Copper pipe 7 Outer cylinder of sensor outer cylinder portion 8 Inner cylinder of sensor outer cylinder portion 9 Sensor outer cylinder portion B End plate of 10 annular space of sensor outer cylinder B 11 optical path (hollow part of sensor outer cylinder B) 12 oil
Claims (1)
かつ気液分離膜を備えた内筒とからなる2重管構造であ
って、前記2重管の両端を環状の端板で封止して外筒と
内筒の間にガス濃度測定用油が流入する環状密閉空間を
形成した気液分離筒体部Aを、外筒と、その外筒内に同
心的に配置された多孔質の内筒とから成る2重管構造で
あって、前記2重管の一端を環状の端板で封止して外筒
と内筒の間に一端開口の環状空間を形成したセンサ外筒
部Bの前記環状空間内に封入したガス検知セルの前記セ
ンサ外筒部の内筒内を光ファイバーから送られるガス濃
度測定光の光路としたことを特徴とする油中ガス濃度測
定用光ファイバーガスセンサ。1. A double pipe structure comprising an outer cylinder and an inner cylinder concentrically arranged in the outer cylinder and provided with a gas-liquid separation membrane, wherein both ends of the double tube are annular ends. A gas-liquid separating cylinder portion A, which is sealed with a plate and forms an annular closed space into which the gas concentration measuring oil flows between the outer cylinder and the inner cylinder, is concentrically arranged in the outer cylinder and the outer cylinder. A double-tube structure composed of a porous inner cylinder and a closed inner end formed between the outer cylinder and the inner cylinder by sealing one end of the double-tube with an annular end plate. For gas concentration measurement in oil, characterized in that the inside of the sensor outer cylinder of the gas detection cell enclosed in the annular space of the sensor outer cylinder B is used as an optical path for gas concentration measuring light sent from an optical fiber. Fiber optic gas sensor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10391391U JPH0552747U (en) | 1991-12-17 | 1991-12-17 | Optical fiber gas sensor for measuring gas concentration in oil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10391391U JPH0552747U (en) | 1991-12-17 | 1991-12-17 | Optical fiber gas sensor for measuring gas concentration in oil |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0552747U true JPH0552747U (en) | 1993-07-13 |
Family
ID=14366671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10391391U Pending JPH0552747U (en) | 1991-12-17 | 1991-12-17 | Optical fiber gas sensor for measuring gas concentration in oil |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0552747U (en) |
-
1991
- 1991-12-17 JP JP10391391U patent/JPH0552747U/en active Pending
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