JPH0234605Y2 - - Google Patents
Info
- Publication number
- JPH0234605Y2 JPH0234605Y2 JP10310182U JP10310182U JPH0234605Y2 JP H0234605 Y2 JPH0234605 Y2 JP H0234605Y2 JP 10310182 U JP10310182 U JP 10310182U JP 10310182 U JP10310182 U JP 10310182U JP H0234605 Y2 JPH0234605 Y2 JP H0234605Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- chamber
- oxygen
- measured
- gas
- 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.)
- Expired
Links
- 239000001301 oxygen Substances 0.000 claims description 18
- 229910052760 oxygen Inorganic materials 0.000 claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 239000003792 electrolyte Substances 0.000 claims description 14
- 238000009792 diffusion process Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 7
- -1 oxygen ion Chemical class 0.000 claims 2
- 239000000428 dust Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 241001406386 Leucaena trichodes Species 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Description
【考案の詳細な説明】
本考案は、酸素濃度検出器に係り、特に燃焼器
に使用するに好適な酸素ポンプ式の酸素濃度検出
器に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oxygen concentration detector, and particularly to an oxygen pump type oxygen concentration detector suitable for use in a combustor.
従来、酸素ポンプ式の酸素濃度検出器として
は、特開昭52−72286等に開示されているものが
公知であるが、拡散抵抗体がごみ等によつてつま
り、出力が経時変化する欠点がある。 Conventionally, as an oxygen pump type oxygen concentration detector, the one disclosed in Japanese Patent Application Laid-Open No. 72286/1986 is known, but it has the disadvantage that the output changes over time due to the diffusion resistor being clogged with dust etc. be.
本考案の目的は、細孔、多孔質等の拡散抵抗体
が、ごみ等によつて変化した場合でも、拡散抵抗
体の変化を検出し、出力信号を補正することによ
り、上記の経時変化を防止した酸素濃度検出器を
提供するにある。 The purpose of this invention is to detect the change in the diffused resistor and correct the output signal even if the diffused resistor, such as pores and porous materials, has changed due to dust etc., thereby eliminating the above-mentioned changes over time. To provide an oxygen concentration detector that prevents
本考案は、拡散抵抗体の抵抗の経時変化を測定
し、この測定信号を基に、出力信号を修正するこ
とによつて、酸素濃度に対する出力信号の経時変
化を防止したものである。 The present invention prevents the output signal from changing over time with respect to oxygen concentration by measuring the change over time in the resistance of the diffused resistor and correcting the output signal based on the measured signal.
第１図において、ヒータ１はセラミツク支持体
２の一部に設けられている。ヒータ１は板状のセ
ラミツク支持体２に、薄膜、あるいは厚膜で構成
され、表面は電気絶縁材でおおわれている。支持
体２の一部に固体電解質３がはりつけられ、支持
体２も電解質３の間にチヤンバ４が構成されてい
る。反対側には固体電解質５がはりつけられ、同
様にチヤンバ６が構成されている。チヤンバ４と
チヤンバ６はオリフイス７を介して導通してい
る。電解質３，５の長さは10mm、幅は10mm、厚さ
は２mm程度で、その両側には、厚さ1μm程度の白
金電極が設けられている。電解質３，５の材料
は、例えばZrO2−Y2O3の混合物であるが、酸素
イオン電導性を有するものであれば、他のもので
もよい。電解質３，５のまわりにはおおい９が設
けられ、チヤンバ１０を構成する。チヤンバ６と
チヤンバ１０はオリフイス８を導通している。オ
リフイス７，８の径は0.5mm、長さは２mm程度で
ある。おおい９は取り付け部材１３に固定され、
支持体２もヒータ１のリード線１１，１２を介し
て、部材１３に固定されている。リード線１１，
１２はセメント１４，１５で部材に固定されてい
る。部材１３のねじは、検出器を燃焼器の排気管
等に取り付けるためのものである。チヤンバ１０
は、オリフイス１６，１７を介して測定ガスと導
通している。ここで、電解質３，５の電極のリー
ド線は省略してある。 In FIG. 1, a heater 1 is provided on a part of a ceramic support 2. In FIG. The heater 1 is constructed of a thin or thick film on a plate-shaped ceramic support 2, the surface of which is covered with an electrically insulating material. A solid electrolyte 3 is attached to a part of the support 2, and a chamber 4 is formed between the electrolytes 3 of the support 2 as well. A solid electrolyte 5 is attached to the opposite side, and a chamber 6 is similarly configured. Chamber 4 and chamber 6 are electrically connected via orifice 7. The electrolytes 3 and 5 have a length of 10 mm, a width of 10 mm, and a thickness of about 2 mm, and platinum electrodes with a thickness of about 1 μm are provided on both sides. The material of the electrolytes 3 and 5 is, for example, a mixture of ZrO2 - Y2O3 , but other materials may be used as long as they have oxygen ion conductivity. A cover 9 is provided around the electrolytes 3 and 5, forming a chamber 10. Chamber 6 and chamber 10 communicate with orifice 8. The diameter of the orifices 7 and 8 is about 0.5 mm, and the length is about 2 mm. The cover 9 is fixed to the mounting member 13,
The support body 2 is also fixed to the member 13 via the lead wires 11 and 12 of the heater 1. Lead wire 11,
12 is fixed to the member with cement 14 and 15. The screw of member 13 is for attaching the detector to the exhaust pipe of the combustor or the like. Chamba 10
are in communication with the measurement gas via orifices 16 and 17. Here, the lead wires of the electrodes of the electrolytes 3 and 5 are omitted.
以上の構成の動作は下記の通りである。リード
線１１，１２に電圧を印加すると、ヒータ１に電
流が流れ、支持体２、電解質３，５の温度が600
〜800℃になるように加熱される。ここで、電解
質３，５の電気抵抗が充分小さくなり、いま、電
解質３，５の両側に電圧を印加すると、電流が流
れ、この電流によつて、電解質３，５に介して酸
素が移動するようになる。ここで、チヤンバ４と
チヤンバ６の酸素分圧をそれぞれ、PVB，PVAと
すると、
PVB＝PVA−β2IB …(1)
PVA＝PM＋β1IA−β1IB …(2)
ここに、PM：測定ガスの酸素分圧
IB：電解質３の電流
IA：電解質５の電流
β1，β2：定数
となる。ここで、β1はオリフイス８の拡散抵抗、
β2、はオリフイス７の拡散抵抗によつて変化す
る。いま、(1)，(2)式を連立すると、
PVB＝PM＋β1IA−（β1＋β2）IB …(3)
となる。(3)式からわかるように、PMが同じでもIA
を変化すれば、PVBが変化する。(3)式を微分する
と、
∂PVB／∂IA＝β1 …(4)
となる。すなわち、IAの変化に対するPVBの変化
を測定することにより、β1を求めることができ
る。(3)式において、PVB≒０とすると、
PM＋β1IA＝（β1＋β2）IB …(5)
となる。IB＝一定で、PVB＝０になようにIAを制
御すれば、IAの値からPMを求めることができる。
第２図は上記動作をフローチヤートで示したもの
である。ブロツク100で、β1／（β1＋β2）を求め
ることができる。ここで、β2は、チヤンバ６、オ
リフイス８を介して測定ガスに接しているので、
β2の経時変化は無視できる。よつて、β1の変化を
知ることができる。PVB≒０にするためには、Ｖ
＞0.1Vになるように、IBを制御すればよい。第１
図の構成において、オリフイス７，８に、拡散抵
抗を与えるものであれば、多孔質でもよい。以
上、拡散抵抗に関する値β1の変化を測定し、この
値で出力信号を修正できるので、オリフイス７，
８のごみによる拡散抵抗の変化、ガス温度による
拡散抵抗の変化を修正することができる。 The operation of the above configuration is as follows. When a voltage is applied to the lead wires 11 and 12, a current flows through the heater 1, and the temperature of the support 2 and electrolytes 3 and 5 increases to 600°C.
It is heated to ~800℃. At this point, the electrical resistance of the electrolytes 3 and 5 has become sufficiently small, and now when a voltage is applied to both sides of the electrolytes 3 and 5, a current flows, and this current causes oxygen to move through the electrolytes 3 and 5. It becomes like this. Here, if the oxygen partial pressures in chamber 4 and chamber 6 are respectively P VB and P VA , then P VB = P VA −β 2 I B …(1) P VA = P M +β 1 I A −β 1 I B ...(2) Here, P M : Oxygen partial pressure of the measurement gas I B : Current in the electrolyte 3 I A : Current in the electrolyte 5 β 1 , β 2 : Constants. Here, β 1 is the diffusion resistance of orifice 8,
β 2 changes depending on the diffusion resistance of the orifice 7. Now, when equations (1) and (2) are combined, P VB = P M + β 1 I A − (β 1 + β 2 ) I B …(3). As can be seen from equation (3), even if P M is the same, I A
If you change , P VB will change. Differentiating equation (3) yields ∂P VB /∂I A =β 1 …(4). That is, β 1 can be determined by measuring the change in P VB with respect to the change in I A . In equation (3), if P VB ≈0, then P M +β 1 I A = (β 1 + β 2 ) I B (5). If I A is controlled so that I B = constant and P VB = 0, P M can be determined from the value of I A.
FIG. 2 is a flowchart showing the above operation. In block 100, β 1 /(β 1 +β 2 ) can be determined. Here, β 2 is in contact with the measurement gas via the chamber 6 and orifice 8, so
The change in β 2 over time is negligible. Therefore, changes in β 1 can be known. In order to make P VB ≒ 0, V
Just control I B so that it becomes >0.1V. 1st
In the configuration shown in the figure, the orifices 7 and 8 may be porous as long as they provide diffusion resistance. As described above, the change in value β 1 related to the diffusion resistance can be measured and the output signal can be corrected using this value, so the orifice 7,
Changes in diffusion resistance caused by dust and gas temperature can be corrected.
本考案によれば、拡散抵抗の変化を測定し、出
力信号を修正できるので、酸素濃度検出器の経時
変化を防止することができる。 According to the present invention, changes in the diffusion resistance can be measured and the output signal can be corrected, so that it is possible to prevent the oxygen concentration detector from changing over time.
第１図は本考案の酸素濃度検出器の実施例の断
面図、第２図は第１図の動作を説明するフローチ
ヤートである。
３，５……電解質、４，６……チヤンバ、７，
８……オリフイス。
FIG. 1 is a sectional view of an embodiment of the oxygen concentration detector of the present invention, and FIG. 2 is a flowchart explaining the operation of FIG. 1. 3,5... Electrolyte, 4,6... Chamber, 7,
8... Orifice.
Claims (1)
極と酸素イオン電導性の第１電解質を介して対
向配置された第２電極； (b) 前記第１電解質の前記第２電極に第１チヤン
バを介して対向配置された拡散抵抗体； (c) 前記拡散抵抗体の前記第１チヤンバが位置し
ている側とは反対側に形成された第２チヤン
バ； (d) 前記第２チヤンバに接する第３電極及び前記
第３電極と拡散抵抗を有する酸素イオン電導性
の第２電解質を介して対向配置された被測定ガ
スと接触する第４電極 を有し、前記第１電極及び前記第２電極に流れる
電流を一定に維持し、しかも前記第１チヤンバの
酸素分圧をほぼ零になるように前記第３電極及び
前記第４電極に流れる電流を調整し、この時の前
記第３電極及び前記第４電極に流れる電流から被
測定ガスの酸素分圧を求めることを特徴とする酸
素濃度検出器。[Claims for Utility Model Registration] (a) A first electrode in contact with a gas to be measured and a second electrode disposed opposite to the first electrode via a first electrolyte having oxygen ion conductivity; (b) The first electrode (c) a second chamber formed on a side of the diffused resistor opposite to the side where the first chamber is located; (d) comprising a third electrode in contact with the second chamber and a fourth electrode in contact with the gas to be measured, which is disposed opposite to the third electrode via a second electrolyte conductive to oxygen ions having diffusion resistance; , the current flowing through the third electrode and the fourth electrode is adjusted so that the current flowing through the first electrode and the second electrode is maintained constant, and the oxygen partial pressure in the first chamber becomes approximately zero. An oxygen concentration detector characterized in that the oxygen partial pressure of the gas to be measured is determined from the current flowing through the third electrode and the fourth electrode at this time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10310182U JPS598147U (en) | 1982-07-09 | 1982-07-09 | oxygen concentration detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10310182U JPS598147U (en) | 1982-07-09 | 1982-07-09 | oxygen concentration detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS598147U JPS598147U (en) | 1984-01-19 |
| JPH0234605Y2 true JPH0234605Y2 (en) | 1990-09-18 |
Family
ID=30242706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10310182U Granted JPS598147U (en) | 1982-07-09 | 1982-07-09 | oxygen concentration detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS598147U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7445496B2 (en) | 2020-03-31 | 2024-03-07 | 三菱重工業株式会社 | Fin tip position measurement method, fin tip position measurement system, and fin tip position measurement jig |
-
1982
- 1982-07-09 JP JP10310182U patent/JPS598147U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS598147U (en) | 1984-01-19 |
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