CN1127038A - 电化学测量探头 - Google Patents
电化学测量探头 Download PDFInfo
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- CN1127038A CN1127038A CN95190294A CN95190294A CN1127038A CN 1127038 A CN1127038 A CN 1127038A CN 95190294 A CN95190294 A CN 95190294A CN 95190294 A CN95190294 A CN 95190294A CN 1127038 A CN1127038 A CN 1127038A
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- 239000000523 sample Substances 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 239000001301 oxygen Substances 0.000 claims abstract 4
- 229910052760 oxygen Inorganic materials 0.000 claims abstract 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract 3
- 239000007789 gas Substances 0.000 claims abstract 3
- 239000007787 solid Substances 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- -1 oxygen ions Chemical class 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000012856 packing Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4078—Means for sealing the sensor element in a housing
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- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Hybrid Cells (AREA)
Abstract
电化学测量探头，用于确定气体中的氢含量，特别是确定内燃机排气中的氧含量，具有一通过密封环(30)而装在壳体(11)中的传感件(15)，该密封环(30)具有一变形的弹性件，该弹性件通过机械偏压使传感件(15)防扭地保持在壳体(11)中。
Description
本发明涉及一种如独立权利要求类型的电化学测量探头。电化学测量探头例如具有呈所谓指形结构的传感件，其中固体电解体作为被封闭的管而密封固定在金属壳体中，指形探头可分为零电位探头和电位联接探头。在电位联接探头中其外电极的导路借助导电密封环与壳体接触；在零电位探头中，各电极触点直接通向控制装置，不允许与壳体电接触，而在这两情况下必须保证固体电解体和壳体之间的密封。
特别是零电位探头的各电极触点中的固体电解体环形面的接触需要支承密封配合的接触件，而存在的危险是，在装配测量探时其固体电解体在装入后扭转，使得电极触点保持到另一位置，从而使得接触可能不可靠。
为了在壳体中密封固体电解体，例如使用了金属密封环，因此在零电位测量探头中在金属密封环区域的外电极的导路必须通过电绝缘覆盖。
本发明独立权利要求特征部分中的测量探头的优点在于，装配后传感件防扭地固定在壳体中，因此电极触点的接触可靠，特别是在装置零电位测量探头时。
通过从属权利要求的方案，本发明的测量探头的优点进一步体现，通过特殊构成的密封环使传感件简易地防扭地固定在壳体中，该密封环通过机械偏压使传感件保持在壳体中。具有弹性件的密封环结构已证明具有特别的用途。
本发明的实施例在附图中给出并在下面的描述中进一步作出解释。
图1示出了通过测量探头排气侧部分的纵向断面图。
图2示出了图1密封区域x的放大断面图。
图3示出了密封环的顶视图，图4示出了图3中线IV-IV的断面图。
图1中示出的电化学测量探头10具有一金属壳体11，该壳体的外侧具有螺纹12作为固定装置用于装在测量气管(未示出)上，壳体具有带密封座14的纵。向孔13，该密封座14支承金属密封环30，在该密封环30上设置具有在凸缘形头部16上形成的局部17的传感件15，在凸缘形头部16上并在密封环30和传感件15之间形成一传感件侧密封面18，纵向孔13在凸缘形头部16区域是这样的，即在传感件15的凸缘形头部16和壳体11之间形成间隙36，在密封座14侧形成壳体侧密封面19，图2放大示出了包括密封环30的密封区域x。
在该实施例中传感件15是管形的固体电解体20，它的气体测量端是封闭的。在承受测量气体的外侧，一层状气体渗透测量电极21而被置于固体电解体20上，一承受参考气体例如空气的层状气体渗透参考电极22而被置于朝向内腔侧。测量电极21通过测量电极导路23通向第一电极接触点25，参考电极22通过参考电极导路24通向第二电极接触点26，各电极接触点25、26位于由固体电解体20的敞开端形成的端面27上。在测量电极21和测量电极导路23的一部分上设置多孔保护层28、电极21、22和导路23、24，优选采用金属陶瓷层并与固体电解体20烧结在一起。
所述突出于壳体11的纵向孔13的气体测量侧的传感件15被保护管40围住，它们之间具有距离，其保护管40具有用于测量气体进出的开口41并固接到壳体的气体测量端。传感件15的内腔例如装有棒状热敏件50，它阻断了远离的测量气体(未示出)并具有导体连接件。
第一触点件45位于第一电极接触点25上，第二触点件46位于第二电极接触点26上。触点件45、46这样形成，例如它们与管状热敏件50邻接并与测量电极联接件47和参考电极联接件48接触，联接件47和48与联接线(未示出)连接并朝外通向测量或控制装置(也未示出)。
此外，在壳体11的纵向孔13中设置优选由陶瓷材料制成的绝缘套筒52。借助于未示出的机加工设备把绝缘套筒52压到触点件45、46上，由此形成与电极接触点25、26的电连接。
图1所示的测量探头是零电位测量探头。由于金属密封环是导电的，所以其测量电极导路23至少在密封区域x被电绝缘层29覆盖(图2)。除了绝缘层29之外，也可设有由许多层构成的电绝缘系统。在该实施例中，绝缘层29围绕邻近于壳体11的固体电解体20的周围延伸。但可进一步想到，其绝缘层29只限定在密封环30接触位置区域或绝缘层29延伸到气体测量的保护层28。例如其绝缘层29是等离子喷射镁-尖晶石层。
为了防扭固定，传感件15借助密封环30通过机械偏压而保持在壳体11中，对此根据图3和图4的密封环30具有一环形件31，在其周围形成具有内宽为W的轴向弹性桥件32，它们突入凸缘形头部16和壳体11之间的间隙36中(图2)。根据本实施例，具有6个径向均匀设置的弹性桥件32，它们各具有一个下部分33和一向外翻卷的部分34，其下部分33内宽W是这样选定的，即，其下部分33可通过偏压支承到凸缘形头部16上。此外，间隙36是这样确定的或者说其上部分34是这样向外翻卷的，即其弹性桥件32支承在纵向孔13的内壁上。由此保证了传感件15借助密封环30机构偏压地保持在壳体11的纵向孔13中(图2)。施加的偏压力使传感件15保持在壳体11中，以便在一定的扭力下其传感件15防扭地固定在壳体11中，该防扭固定传感件在装配时保持其径向定位。
本实施例中，由镍铬钢制成的密封环30通过由镍或铜制成的双侧叠置的可塑层而实现，但也可进一步想到使用其它材料制造相应弹性的桥件32，此外要保证足够的密封性，然而其密封环30也不仅仅限于零电位探头的部件。
Claims (5)
1、电化学测量探头，用于确定气体中的氧含量，特别是确定内燃机排气中的氧含量，具有通过密封环装在壳体中的传感件，该传感件具有其一侧呈封闭管形的传导氧离子的固体电解体，其特征在于，具有通过机械偏压把传感件(15)防扭地保持在壳体(11)中的装置。
2、如权利要求1所述的测量探头，其特征在于，其装置至少由一个在密封环30上变形的弹性件(32)构成。
3、如权利要求2的测量探头，其特征在于，密封环(30)具有环形件(31)，在该环形件上径向均匀分布被变形出的弹性件(32)。
4、如权利要求2或3的测量探头，其特征在于，其弹性件(32)各具有一个下部分(33)和一个向外翻卷的上部分(34)并具有内宽(W)，下部分(33)机械偏压地与传感件(15)邻接，上部分(34)机械偏压地支承在壳体(11)上。
5、如上述权利要求之一的测量探头，其特征在于，由镍铬钢制成的密封环(30)的叠置可塑层由镍或铜制成。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9409684U DE9409684U1 (de) | 1994-06-16 | 1994-06-16 | Elektrochemischer Meßfühler |
| DEG9409684.8U | 1994-06-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1127038A true CN1127038A (zh) | 1996-07-17 |
| CN1052068C CN1052068C (zh) | 2000-05-03 |
Family
ID=6909887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95190294A Expired - Lifetime CN1052068C (zh) | 1994-06-16 | 1995-06-03 | 电化学测量探头 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5698084A (zh) |
| EP (1) | EP0714509B1 (zh) |
| JP (1) | JP3675825B2 (zh) |
| KR (1) | KR100366136B1 (zh) |
| CN (1) | CN1052068C (zh) |
| DE (2) | DE9409684U1 (zh) |
| WO (1) | WO1995034809A1 (zh) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335895C (zh) * | 2003-08-22 | 2007-09-05 | 株式会社电装 | 确保电接头稳定性的气敏传感器的改进结构 |
| CN1912402B (zh) * | 2005-08-10 | 2012-09-05 | 梅特勒-托莱多股份公司 | 用于可互换测量探头的保持支架 |
| CN106770581A (zh) * | 2016-11-29 | 2017-05-31 | 深圳万发创新进出口贸易有限公司 | 一种能够识别no2危险气体的探测装置 |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPN166695A0 (en) * | 1995-03-10 | 1995-04-06 | Ceramic Oxide Fabricators Pty. Ltd. | Gas sensor |
| AU697752B2 (en) * | 1995-03-10 | 1998-10-15 | Ceramic Oxide Fabricators Pty. Ltd. | Gas sensor |
| DE19641809C2 (de) * | 1996-10-10 | 1998-07-30 | Bosch Gmbh Robert | Dichtelement für Meßfühler |
| DE19641808A1 (de) * | 1996-10-10 | 1998-04-16 | Bosch Gmbh Robert | Dichtelement für Meßfühler und Verfahren zu seiner Herstellung |
| JPH10300714A (ja) * | 1997-04-23 | 1998-11-13 | Robert Bosch Gmbh | 測定装置 |
| US6404205B1 (en) * | 1997-05-09 | 2002-06-11 | Japan Storage Battery Co., Ltd. | Method for testing the reliability of an electrochemical gas sensor |
| JP3956435B2 (ja) * | 1997-08-07 | 2007-08-08 | 株式会社デンソー | 酸素センサ素子 |
| JPH11153571A (ja) * | 1997-11-20 | 1999-06-08 | Denso Corp | 酸素センサ素子 |
| DE69822968T2 (de) * | 1997-11-21 | 2005-03-31 | Denso Corp., Kariya | Gassensor |
| US6426631B1 (en) * | 1999-04-28 | 2002-07-30 | Kyocera Corporation | Oxygen sensor device incorporating a heater therein |
| JP4576722B2 (ja) | 2000-03-27 | 2010-11-10 | 株式会社デンソー | ガスセンサ |
| US8257564B2 (en) * | 2004-11-30 | 2012-09-04 | Ngk Spark Plug Co., Ltd. | Gas sensor, and gas sensor manufacturing method |
| JP2007163307A (ja) * | 2005-12-14 | 2007-06-28 | Denso Corp | ガスセンサ |
| JP5931664B2 (ja) | 2011-11-04 | 2016-06-08 | 日本特殊陶業株式会社 | ガスセンサ |
| JP6316580B2 (ja) * | 2013-12-06 | 2018-04-25 | 日本特殊陶業株式会社 | ガスセンサ |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2100052A (en) * | 1935-02-09 | 1937-11-23 | Hejduk Frantisek | Meter for measuring and registering liquid volumes received and delivered |
| US3835012A (en) * | 1972-08-28 | 1974-09-10 | Bendix Corp | Protective shield for oxygen sensor |
| FR2224043A5 (zh) * | 1973-03-28 | 1974-10-25 | Bosch Gmbh Robert | |
| DE2504206C3 (de) * | 1975-02-01 | 1981-10-01 | Robert Bosch Gmbh, 7000 Stuttgart | Elektrochemischer Meßfühler für die Bestimmung des Sauerstoffgehalts in Abgasen, insbesondere in Abgasen von Verbrennungsmotoren |
| DE2553292C3 (de) * | 1975-11-27 | 1978-08-17 | Robert Bosch Gmbh, 7000 Stuttgart | Elektrochemischer Meßfühler für die Bestimmung des Sauerstoffgehaltes in Abgasen, insbesondere in Abgasen von Verbrennungsmotoren |
| JPS5625408Y2 (zh) * | 1976-08-23 | 1981-06-16 | ||
| JPS5941952B2 (ja) * | 1978-04-18 | 1984-10-11 | 株式会社デンソー | 酸素濃度センサ−用ジルコニア焼結体 |
| EP0145175B1 (en) * | 1983-11-10 | 1988-09-28 | NGK Spark Plug Co. Ltd. | Oxygen sensor |
| US4540070A (en) * | 1984-07-19 | 1985-09-10 | Caldwell Manufacturing Co., Inc. | Vibration dampener for coil tension window balance spring |
| US4944861A (en) * | 1989-04-03 | 1990-07-31 | Barber-Colman Company | Oxygen sensing probe having improved sensor tip and tip-supporting tube |
| DE3922331C2 (de) * | 1989-07-07 | 1998-12-03 | Bosch Gmbh Robert | Gasmeßfühler |
| US5246562A (en) * | 1990-10-26 | 1993-09-21 | Robert Bosch Gmbh | Gas measurement sensor, especially for determining oxygen concentration in exhaust gases of internal combustion engines |
| EP0520528A1 (en) * | 1991-06-10 | 1992-12-30 | General Motors Corporation | Electrochemical-type exhaust gas oxygen sensor having improved metal to ceramic seal |
| US5573650A (en) * | 1993-01-28 | 1996-11-12 | Nippondenso Co., Ltd. | Gas sensor |
| DE4312506A1 (de) * | 1993-04-16 | 1994-10-20 | Bosch Gmbh Robert | Elektrochemischer Sauerstoff-Meßfühler |
-
1994
- 1994-06-16 DE DE9409684U patent/DE9409684U1/de not_active Expired - Lifetime
-
1995
- 1995-06-03 JP JP50145396A patent/JP3675825B2/ja not_active Expired - Fee Related
- 1995-06-03 DE DE59510521T patent/DE59510521D1/de not_active Expired - Fee Related
- 1995-06-03 CN CN95190294A patent/CN1052068C/zh not_active Expired - Lifetime
- 1995-06-03 EP EP95920756A patent/EP0714509B1/de not_active Expired - Lifetime
- 1995-06-03 WO PCT/DE1995/000730 patent/WO1995034809A1/de active IP Right Grant
- 1995-06-03 KR KR1019950705941A patent/KR100366136B1/ko not_active IP Right Cessation
- 1995-06-03 US US08/591,535 patent/US5698084A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335895C (zh) * | 2003-08-22 | 2007-09-05 | 株式会社电装 | 确保电接头稳定性的气敏传感器的改进结构 |
| CN1912402B (zh) * | 2005-08-10 | 2012-09-05 | 梅特勒-托莱多股份公司 | 用于可互换测量探头的保持支架 |
| CN106770581A (zh) * | 2016-11-29 | 2017-05-31 | 深圳万发创新进出口贸易有限公司 | 一种能够识别no2危险气体的探测装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0714509A1 (de) | 1996-06-05 |
| DE9409684U1 (de) | 1995-10-12 |
| DE59510521D1 (de) | 2003-02-06 |
| JP3675825B2 (ja) | 2005-07-27 |
| EP0714509B1 (de) | 2003-01-02 |
| US5698084A (en) | 1997-12-16 |
| WO1995034809A1 (de) | 1995-12-21 |
| JPH09501776A (ja) | 1997-02-18 |
| KR960703463A (ko) | 1996-08-17 |
| CN1052068C (zh) | 2000-05-03 |
| KR100366136B1 (ko) | 2003-03-26 |
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