JPH03189539A - Instrument for measuring concentration of hydrogen - Google Patents
Instrument for measuring concentration of hydrogenInfo
- Publication number
- JPH03189539A JPH03189539A JP32849089A JP32849089A JPH03189539A JP H03189539 A JPH03189539 A JP H03189539A JP 32849089 A JP32849089 A JP 32849089A JP 32849089 A JP32849089 A JP 32849089A JP H03189539 A JPH03189539 A JP H03189539A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen
- resistance value
- occluding alloy
- storage alloy
- instrument
- 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
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は水素吸蔵合金が水素を吸収する時の特性を利用
した水素濃度の測定装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hydrogen concentration measuring device that utilizes the characteristics of a hydrogen storage alloy when it absorbs hydrogen.
従来例として特公昭５９−２５４５１号公報の装置を第
２図に示す。この従来例は、ナトリウム冷却高速増殖炉
用蒸気発生器の水漏洩検出計に用いて好適な水素検出器
に関するものである。図で、ナトリウム入口管１２に接
続される入口ナトリウム室１３と、水素透過膜１４が配
設される真空室１５と、水素透過膜１４により入口ナト
リウム室１３と連通されている出口ナトリウム室１６と
から形成されている。出口ナトリウム室１６にはす１〜
リウム出口管１７が接続され、真空室１５には真空排気
管１８が接続されている。１９は水素の流れを示し、２
０はナトリウムの流れを示す。この装置の作用は以下の
通りである。ナトリウム冷却高速増殖炉蒸気発生器より
採取したナトリウム２０は入口ナトリウム室１３をへて
、水素透過膜１４を通過し出口ナトリウム室１４へ流れ
る。その際、ナトリウム中に含まれる水素は水素通過膜
を通過し、真空室１５に流れる。真空室１５に流れた水
素は真空排気管１８をへて１元素分析器八と導かれて分
析を受ける。As a conventional example, a device disclosed in Japanese Patent Publication No. 59-25451 is shown in FIG. This conventional example relates to a hydrogen detector suitable for use in a water leak detector of a steam generator for a sodium-cooled fast breeder reactor. In the figure, an inlet sodium chamber 13 connected to the sodium inlet pipe 12, a vacuum chamber 15 in which a hydrogen permeable membrane 14 is disposed, and an outlet sodium chamber 16 communicated with the inlet sodium chamber 13 through the hydrogen permeable membrane 14. is formed from. The outlet sodium chamber 16 is filled with 1~
A lium outlet pipe 17 is connected, and a vacuum exhaust pipe 18 is connected to the vacuum chamber 15. 19 indicates the flow of hydrogen, 2
0 indicates sodium flow. The operation of this device is as follows. Sodium 20 collected from the sodium-cooled fast breeder reactor steam generator passes through the inlet sodium chamber 13, passes through the hydrogen permeable membrane 14, and flows to the outlet sodium chamber 14. At this time, hydrogen contained in the sodium passes through the hydrogen-permeable membrane and flows into the vacuum chamber 15. The hydrogen flowing into the vacuum chamber 15 passes through the vacuum exhaust pipe 18 and is guided to the single element analyzer 8 for analysis.
上記従来技術は、検出時間が遅く、また、計測配管中で
も水素ガスの吸着、あるいは、漏洩等があり４１す定精
度が悪い。さらに、このような水素検出装置は、ナトワ
ウ１１サンプリング系、および、真空系が一つの水素計
センサの専用となり、設備が複雑になるという欠点があ
った。In the above-mentioned conventional technology, the detection time is slow, and hydrogen gas may be adsorbed or leaked even in the measurement piping, resulting in poor measurement accuracy. Furthermore, such a hydrogen detection device has the disadvantage that the Natowau 11 sampling system and the vacuum system are dedicated to one hydrogen meter sensor, making the equipment complex.
本発明は、小型で応答性、検出精度および信頼性が高い
水素濃度測定装置を提供することを目的とする。An object of the present invention is to provide a hydrogen concentration measuring device that is small in size and has high responsiveness, detection accuracy, and reliability.
上記目的は、水素透過性金属膜で形成される容器と、容
器内に設けられ水素吸収により電気抵抗値が変化する水
素吸蔵合金と、雰囲気温度が水素吸蔵合金におよぼす影
響を抑止する手段とをもつことにより達成される。The above object is to provide a container formed of a hydrogen-permeable metal film, a hydrogen storage alloy provided in the container whose electrical resistance value changes due to hydrogen absorption, and a means for suppressing the influence of ambient temperature on the hydrogen storage alloy. This is achieved by holding.
水素吸蔵合金は水素を吸収すると熱伝導率、電気抵抗値
が低下する。その低下率は水素の吸収量に比例する。こ
の電気伝導度の変化を測定することにより水素濃度の測
定が可能となる。When a hydrogen storage alloy absorbs hydrogen, its thermal conductivity and electrical resistance decrease. The rate of decrease is proportional to the amount of hydrogen absorbed. By measuring this change in electrical conductivity, hydrogen concentration can be measured.
本発明の一実施例を第１図に示す。この水素濃度検出装
置１において、内部が真空に保たれている真空容器２の
先端側には多数の孔が設けられ、その孔の部分の内側に
は水素透過性の良好な薄い水素透過膜３が設けられてい
る。水素透過性の良い物質には、ニッケル、バラジュウ
ム等があるが、ナトリウムとの両立性が良好なニッケル
膜が好適である。An embodiment of the present invention is shown in FIG. In this hydrogen concentration detection device 1, a large number of holes are provided on the tip side of a vacuum container 2 whose interior is kept in a vacuum, and a thin hydrogen permeable membrane 3 with good hydrogen permeability is provided inside the hole portion. is provided. Substances with good hydrogen permeability include nickel, baladium, etc., and a nickel film is preferred because of its good compatibility with sodium.
水素透過膜３の内側には温度補償用抵抗体４がコイル状
に設けられ、その一端は真空容器２に接続し、その他端
はリード線５として真空容器２の他端に固定された端子
６に接続されている。温度補償用抵抗体４の材質は、後
述する水素吸蔵合金７と温度に対する抵抗変化率が同一
であるものが用いられる。A temperature compensating resistor 4 is provided in a coil shape inside the hydrogen permeable membrane 3, one end of which is connected to the vacuum vessel 2, and the other end is a terminal 6 fixed to the other end of the vacuum vessel 2 as a lead wire 5. It is connected to the. The temperature compensating resistor 4 is made of a material that has the same rate of change in resistance with respect to temperature as the hydrogen storage alloy 7 described later.
真空容器２の真中には、水素吸蔵合金７が設けられてい
る。水素吸蔵合金７は、板状をなし、パラジウムが良好
である。水素吸蔵合金７の一端は、真空容器２に接続さ
れ、他端はリード線５を介して真空容器２の端部に固定
されている端子６に接続されている。A hydrogen storage alloy 7 is provided in the center of the vacuum container 2 . The hydrogen storage alloy 7 has a plate shape and is preferably made of palladium. One end of the hydrogen storage alloy 7 is connected to the vacuum container 2, and the other end is connected to a terminal 6 fixed to the end of the vacuum container 2 via a lead wire 5.
真空容器２の」一端側には真空排気管８が接続され、１
０−３〜１０−’Ｔｏｒｒの真空が保持されるようにな
っている。A vacuum exhaust pipe 8 is connected to one end of the vacuum container 2.
A vacuum of 0-3 to 10-' Torr is maintained.
次に、水素濃度測定装置１の作用について示す。Next, the operation of the hydrogen concentration measuring device 1 will be described.
水素ａ度測定装置を適当な雰囲気においた場合を考える
（例えば、ナトリウム冷却高速増殖炉蒸気発生器内部）
。雰囲気中の水素ガスは水素透過膜３を透過して水素濃
度測定装置１の内部に拡散される。拡散された水素ガス
は水素吸蔵合金７に吸収される。吸収される水素ガスの
量に比例して水素吸蔵合金７の電気抵抗値が低下してい
く。この電気抵抗値の変化を端子６に通じてとらえるこ
とができる。又、温度補償用抵抗体４は水素吸蔵合金と
ホイストンブリッジ回路をなし、雰囲気温度による抵抗
変化の補償を行う。Consider the case where the hydrogen a degree measuring device is placed in an appropriate atmosphere (for example, inside a sodium-cooled fast breeder reactor steam generator)
. Hydrogen gas in the atmosphere passes through the hydrogen permeable membrane 3 and is diffused into the hydrogen concentration measuring device 1 . The diffused hydrogen gas is absorbed by the hydrogen storage alloy 7. The electrical resistance value of the hydrogen storage alloy 7 decreases in proportion to the amount of hydrogen gas absorbed. This change in electrical resistance value can be detected through the terminal 6. Further, the temperature compensation resistor 4 forms a Whiston bridge circuit with the hydrogen storage alloy, and compensates for resistance changes due to ambient temperature.
本発明によれば、一部を水素透過性金属膜で形成される
真空容器と、真空容器の内部に設けられた水素吸蔵合金
と、雰囲気温度が水素吸蔵合金におよぼす影響を抑止す
る手段とをもつことにより。According to the present invention, a vacuum container partially formed of a hydrogen-permeable metal membrane, a hydrogen storage alloy provided inside the vacuum container, and a means for suppressing the influence of ambient temperature on the hydrogen storage alloy are provided. By having one.
小型で応答性が著しく向上し、水素発生設備内部に多数
を同時に挿入可能となり水素発生の有無を直接的に殖認
することが可能となって信頼性が向上し、又、検出排管
系や質量分析系等が不用となり設備が単純化される。It is compact and has significantly improved responsiveness, and it is possible to insert many units into the hydrogen generation equipment at the same time, making it possible to directly confirm the presence or absence of hydrogen generation, improving reliability. Mass spectrometry systems and the like are not required, simplifying the equipment.
第１図は、本発明に係る一実施例を示す断面図、第２図
は、従来例に係る水素検出器の一実施例を示す断面図で
ある。
１・・・水素濃度測定装置、２・・・真空容器、３・・
・水素透過膜、４・・・温度補償用抵抗体、５・・・リ
ード線、未
１
図
呆
図FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing an embodiment of a conventional hydrogen detector. 1... Hydrogen concentration measuring device, 2... Vacuum container, 3...
・Hydrogen permeable membrane, 4...Temperature compensation resistor, 5...Lead wire, missing figure
Claims (1)
に設けられた水素吸収により電気抵抗値が変化する水素
吸蔵合金と、雰囲気温度が前記水素吸蔵合金におよぼす
影響を抑止する手段とを有することを特徴とする水素濃
度測定装置。 ２、前記雰囲気温度が前記水素吸蔵合金におよぼす影響
を抑止する手段は、電気抵抗値の温度変化率が前記水素
吸蔵合金と等しい温度補償用抵抗体と、前記水素吸蔵合
金を含むホイストンブリッジを用いることを特徴とする
特許請求の範囲第１項に記載の水素濃度測定装置。[Scope of Claims] 1. A container formed of a hydrogen-permeable metal film, a hydrogen storage alloy provided in the container whose electrical resistance value changes due to hydrogen absorption, and a hydrogen storage alloy whose electrical resistance value changes due to the absorption of hydrogen by ambient temperature. A hydrogen concentration measuring device characterized by having means for suppressing the influence. 2. The means for suppressing the influence of the ambient temperature on the hydrogen storage alloy includes a temperature compensating resistor whose electrical resistance value changes with temperature equal to that of the hydrogen storage alloy, and a Whiston bridge containing the hydrogen storage alloy. The hydrogen concentration measuring device according to claim 1, wherein the hydrogen concentration measuring device is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32849089A JPH03189539A (en) | 1989-12-20 | 1989-12-20 | Instrument for measuring concentration of hydrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32849089A JPH03189539A (en) | 1989-12-20 | 1989-12-20 | Instrument for measuring concentration of hydrogen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03189539A true JPH03189539A (en) | 1991-08-19 |
Family
ID=18210863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32849089A Pending JPH03189539A (en) | 1989-12-20 | 1989-12-20 | Instrument for measuring concentration of hydrogen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03189539A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000081404A (en) * | 1998-06-29 | 2000-03-21 | Equos Research Co Ltd | Hydrogen meter |
| JP2000097931A (en) * | 1998-09-25 | 2000-04-07 | Toyota Autom Loom Works Ltd | Method and device for detecting amount of hydrogen occlusion in hydrogen occlusion tank |
| JP2000206073A (en) * | 1999-01-01 | 2000-07-28 | Equos Research Co Ltd | Hydrogen storage measurement method |
-
1989
- 1989-12-20 JP JP32849089A patent/JPH03189539A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000081404A (en) * | 1998-06-29 | 2000-03-21 | Equos Research Co Ltd | Hydrogen meter |
| JP2000097931A (en) * | 1998-09-25 | 2000-04-07 | Toyota Autom Loom Works Ltd | Method and device for detecting amount of hydrogen occlusion in hydrogen occlusion tank |
| JP2000206073A (en) * | 1999-01-01 | 2000-07-28 | Equos Research Co Ltd | Hydrogen storage measurement method |
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