EP3580553A1 - Sensor zur analyse von gasen - Google Patents
Sensor zur analyse von gasenInfo
- Publication number
- EP3580553A1 EP3580553A1 EP18700449.4A EP18700449A EP3580553A1 EP 3580553 A1 EP3580553 A1 EP 3580553A1 EP 18700449 A EP18700449 A EP 18700449A EP 3580553 A1 EP3580553 A1 EP 3580553A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- housing
- opening
- housing interior
- glass
- 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.)
- Withdrawn
Links
Classifications
-
- 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
-
- 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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
Definitions
- the present invention relates to a sensor for the analysis of gases according to the preamble of patent claim 1.
- the present invention also relates to a method for producing a sensor.
- Various sensors for the analysis of gases are known from the prior art. Such sensors are often used in an exhaust system of internal combustion engines, for example as soot sensors. These sensors are exposed to high levels of temperature, shock and corrosion. Therefore, it is necessary for the function of the sensor that the sensor element used in the sensor, usually a sensor strip on ceramic substrate, is held mechanically stable and gas-tight in a housing of the sensor.
- sensor strips on ceramic substrate in soot sensors are fixed in a housing by means of "dry pressed powder packing.”
- US 2016/0273944 A1 describes such a sensor having a sensor element surrounded by a pressed mineral powder and by the mineral powder
- An alternative construction with ceramic molded parts instead of mineral powder is described in DE 197 07 456 A1
- the sensor element is mechanically held in a longitudinal bore of a housing of the sensor by means of two ceramic moldings and gas-tight by means of a glass seal only for ceramic molded part, but not against Moisture to the housing.
- the sensor according to the invention for the analysis of gases has for this purpose:
- At least one housing having a housing interior with a first opening and a second opening opposite the first opening;
- At least one sensor element which is arranged at least partially in the housing interior
- At least one glass element and at least one potting element which are arranged in the housing interior in a space between a housing wall in the housing interior and the sensor element and the sensor element at least partially completely surrounded, wherein the glass element is disposed at the first opening of the housing interior in the housing interior of the housing and is adapted to seal the gap hermetically in the direction of the first opening, and wherein the potting element is arranged on the glass melting element in the direction of the second opening and adapted to fix the sensor element in the housing interior in a form-fitting manner.
- analysis of gases may be used to refer to a determination of soot particles in the exhaust gases of a motor vehicle.
- Gas analysis may also include sensing a temperature a gas, or exhaust gases.
- an “analysis of gases” may also include the detection of the chemical composition of a gas or of exhaust gases.
- housing can be understood to mean a holder for the sensor element which is connected to the sensor element.
- first aperture and second aperture may be used to describe opposing apertures, or opposing portions, with a material recess on the housing or in the surface of the housing.
- the sensor element can be arranged in the housing and extend out of the first and / or second opening, or protrude out of the openings.
- the openings may for example be greater than a diameter of the sensor element.
- first opening may be used to describe an opening near a terminal area or at the terminal area of the sensor and / or sensor element
- second opening may be used to define an opening near a measuring area or to describe at the measuring range of the sensor and / or sensor element.
- at least partially completely surrounded can be used to describe that at least the outer surface of the sensor element is completely surrounded by the respective element in a longitudinal section of the sensor element or 360 ° by the respective element be used to describe a non-detachable connection between the sensor element and the potting.
- the potting element can be adapted to fix the sensor element in the housing interior in a form-fitting and cohesive manner.
- the term "cohesive" describes a compound in which the bonding partners are held together by atomic or molecular forces and are at the same time insoluble compounds that can only be separated by destruction of the bonding agents.
- the invention is therefore based on the surprising finding that an improved sealing of the connection region of the sensor can be achieved.
- the mechanical stresses on the sensor element are reduced in the manufacture and use of the sensor.
- the forces acting on the sensor element forces are kept away from the glass element.
- the sensor according to the invention allows the use of shorter sensor elements, for example, shorter sensor strips, which brings a material and cost savings. With the invention it is for the first time been able to create a connection that leads to an improved encapsulation of the sensor.
- the glass element takes over the sealing function in the colder area and is supported by the casting element. The penetration of moisture through the first opening of the housing is thereby prevented.
- the potting element is highly temperature-resistant and takes over the mechanical attachment of the sensor strip, without mechanically damaging the sensor strip.
- the potting element and the glass element are fixed to one another in a form-fitting and / or cohesive manner.
- This arrangement increases the stability and durability of the sensor.
- a form-fitting and / or material connection between all components of the sensor element can be realized, ie a positive and / or material connection of the housing, the potting element, the glass element and the sensor element.
- At least one end portion (s) of the sensor element projects at least partially out of the first opening and / or the second opening.
- the housing comprises at least one connection flange.
- connection flange may for example be a flat web, which is arranged around the housing and / or is integrally formed with the housing.
- the sensor may further comprise at least a first attachment, wherein the first attachment is adapted to surround the sensor element at the first opening, and / or the sensor has at least a second attachment, wherein the second attachment is adapted to the sensor element Surround the second opening, and wherein the first attachment and / or the second attachment are attached to the connection flange, in particular welded to the connection flange.
- the term “surrounding” can also be used synonymously with “covering” or “capsules.”
- the first and the second attachment can each also be a component of an exhaust system.
- connection flange can be used to arrange additional attachments to the sensor housing.
- the other attachments can be welded to the flange. Further advantageous causes the flange as a "spring" mechanical decoupling.
- the housing has a metal sleeve, in particular a deep-drawn sleeve, preferably, the metal sleeve has a taper at the first opening.
- the housing comprises a cobalt alloy, in particular a nickel-cobalt alloy comprising Alloy 605, and / or
- the housing has a wall thickness of 0.2mm to 0.6mm.
- This choice of material allows a good processability, as well as a good heat resistance of the sensor housing.
- the low material strength causes a softer clamping in the complete sensor.
- the glass element has a glass solder.
- the glass solder has the advantageous effect that the sensor element in the direction and / or at the first opening can be hermetically, that is sealed airtight and no moisture penetrates.
- the glass solder is expansion-adapted, tight-melting, media-resistant and comprises PbO, Al 2 O 3, SiO 2, B 2 O 3 and further constituents.
- the encapsulation element has a ceramic encapsulation, in particular an expansion-adapted encapsulation based on aluminum oxide.
- the ceramic potting can take over the mechanical attachment of the sensor element, without burdening the sensor element.
- the sensor element has:
- At least one sensor strip comprising at least one substrate, in particular a ceramic substrate;
- At least one measuring means in particular a measuring resistor arranged on the substrate
- connection means preferably the measuring means and / or the connection means are arranged at least partially outside the housing interior.
- the sensor element may be a sensor element of a soot sensor.
- the base may be defined by a substrate of a ceramic material, e.g. AI203 be formed.
- a meander can be applied, which serves as a heating element.
- At least two electrodes may be applied as measuring means on the opposite side of the substrate.
- the two electrodes can be designed, for example, as entangled meanders or as an interdigitated comb structure.
- platinum can be used as the electrode material since it is electrically conductive and can withstand the high temperature peaks in the exhaust gas.
- the connection means may comprise, for example, nickel wire connecting wires with a platinum sheath.
- the glass element and the potting element in the housing interior in the space between the housing wall of the housing interior and the substrate of the sensor element may be arranged and at least partially completely surround only the substrate of the sensor element.
- connection means is not surrounded by the glass element, but only the substrate of the sensor element.
- the glass element for example the glass solder
- the connection means for example the connection wire.
- the sensor element is adapted to be operated as a gas sensor, soot sensor, lambda probe, temperature sensor, chemosensor or flow sensor or any combination of these sensors and / or as a heating element.
- the senor according to the invention can be universally used for a wide range of applications.
- the invention also proposes a method for producing a sensor according to the invention.
- the method comprises the following steps:
- At least one housing having a housing interior with a first opening and a second opening opposite the first opening, at least one sensor element, at least one glass element and at least one potting element;
- the method is characterized in that the heating comprises at least one burning process of the sensor, preferably in a kiln.
- the potting element and the glass element can be sintered and / or melted by means of the firing process to the housing and to the sensor element.
- FIG. 1 a shows a schematic sectional view of a sensor 1 known from the prior art.
- the sensor 1 shown by way of example comprises a sensor element 5, for example a sensor strip, which is installed in a housing 3 by means of "dry-pressed powder packing.” It is shown in FIG. 1a that the sensor element 5 is held by a compressed powder 9 which is arranged between two ceramic disks 7a, 7b. The rear connection region of the sensor 1 is highlighted by means of a circle "X". As already mentioned, in the sensor 1 a shown, moisture can pass through the pressed powder 9 and reach the connection region of the sensor 1.
- Figure 1 b shows an alternative embodiment of a known from the prior art sensor 1 ', which is described in the already mentioned prior art document US 2016/0273944 A1.
- the sensor element 5 ' is held by a ceramic shaped part 7'.
- FIG. 1 c shows a further refinement of a sensor 1 "known from the prior art, which is described in the already mentioned prior art document DE 197 07 456 A1
- the sensor element 5" of two Ceramic moldings 7a ", 7b” held.
- a glass element 9 is disposed between the two ceramic molded parts 7a", 7b ", which closes gas-tightly to the ceramic molded parts 7a", 7b.
- the sensor element 5" on the outwardly facing edges of the Cast ceramic parts 7a ", 7b” on and break.
- no cohesive seal between the terminal-side end portion of the sensor 1 "and the housing 3" is available.
- Figures 2a, 2b show a schematic side view and a schematic plan view of a sensor element 50 according to an embodiment of the invention.
- the sensor element 50 shown only schematically in FIGS. 2a and 2b can have a base which is formed from a substrate made of a ceramic material.
- the substrate may have Al 2 O 3, a length of 32 mm, a width of 3.6 mm and a thickness of 1 mm.
- a meander may be applied on one side of the substrate (not shown) and on the other side at least two electrodes may be applied as measuring means (not shown).
- measuring devices with a different mode of action can also be used.
- the sensor element 50 shown in FIGS. 2a, 2b also has connecting means 110 in the form of connecting wires.
- these leads may be made of nickel wire with platinum sheath and have a diameter of 0.2mm.
- the connection wires can also have other materials and / or other cross sections.
- the sensor element may be a sensor element of a soot sensor.
- the base may be formed by a substrate of a ceramic material, eg Al 2 O 3. On one side of the substrate, a meander can be applied, which serves as a heating element. At least two electrodes may be applied as measuring means on the opposite side of the substrate.
- FIG. 3 shows a schematic sectional view of a housing 30 according to embodiments of the invention.
- the housing 30 shown in Figure 3 comprises a housing interior 130 and has a metal sleeve, which may be formed by a thermoformed sleeve.
- the housing 30 may also comprise a cobalt alloy, in particular a nickel-cobalt alloy comprising Alloy 605.
- the housing 30 can have a small wall thickness, for example a wall thickness in the region of 0.2 mm to 0.6 mm, in order thereby to be better deformable and to achieve a softer clamping in the complete sensor.
- the housing 30 shown in FIG. 3 also comprises a connection flange 150, which extends in a ring-shaped manner around the outer wall of the housing 30 in the horizontal direction.
- Figures 4a, 4b show a schematic sectional view and a perspective view of a sensor 10 according to an embodiment of the invention.
- the sensor 10 includes a housing 30, which may be a housing, as shown in FIG.
- the housing 30 has a housing interior 130 having a first opening 170 and a second opening 190 opposite the first opening 170.
- the connection area of the sensor 10 to the connection means 110 is located at the first opening 170, which allows the sensor element 50 can be connected to an evaluation unit (not shown).
- At the second opening 190 is the measuring range of the sensor element 50.
- the sensor element 50 is at least partially disposed in the housing interior 130 of the housing 30.
- a glass element 90 is attached to and / or in the first opening 170 of the housing interior 130 in the housing interior 130 of the housing 30 arranged and seals the gap hermetically in the direction of the first opening 170 from.
- the glass element 90 can therefore have a glass solder, which seals the intermediate space or gap between the housing 30 and the sensor element 50 in a material-tight manner by means of a firing process.
- a potting element 70 is arranged so that the glass element 90 completely surrounds the side facing away from the housing 30.
- the sensor element 50 is fixed in a form-fitting manner by the potting element 70 in the housing interior 130 of the housing 30.
- FIG. 5 shows a schematic side view of a sensor 10 with a first and second attachment 210, 230 arranged thereon.
- the first attachment 210 is arranged on the first opening 170 of the sensor 10 and surrounds it at the first opening
- the second attachment part 230 is arranged on the second opening 190 of the sensor 10 and surrounds the second opening 190 arranged part of the sensor element 50.
- the first attachment 210 and the second attachment 230 with be welded to the connection flange 150.
- alternative joining techniques such as, for example, pressing or gluing the two attachments 210, 230 on the connecting flange 150, can also be used.
- FIG. 6 shows a method 1000 for producing a sensor 10 according to an embodiment of the invention. The method 1000 has the following steps:
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17155772.1A EP3361244B1 (de) | 2017-02-13 | 2017-02-13 | Sensor zur analyse von gasen und verfahren zum herstellen des sensors |
PCT/EP2018/050062 WO2018145822A1 (de) | 2017-02-13 | 2018-01-02 | Sensor zur analyse von gasen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3580553A1 true EP3580553A1 (de) | 2019-12-18 |
Family
ID=58043909
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17155772.1A Active EP3361244B1 (de) | 2017-02-13 | 2017-02-13 | Sensor zur analyse von gasen und verfahren zum herstellen des sensors |
EP18700449.4A Withdrawn EP3580553A1 (de) | 2017-02-13 | 2018-01-02 | Sensor zur analyse von gasen |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17155772.1A Active EP3361244B1 (de) | 2017-02-13 | 2017-02-13 | Sensor zur analyse von gasen und verfahren zum herstellen des sensors |
Country Status (7)
Country | Link |
---|---|
US (1) | US11054378B2 (de) |
EP (2) | EP3361244B1 (de) |
JP (1) | JP7090629B2 (de) |
KR (1) | KR102289281B1 (de) |
CN (1) | CN110312931B (de) |
TW (1) | TWI661194B (de) |
WO (1) | WO2018145822A1 (de) |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2215873A6 (de) | 1973-01-30 | 1974-08-23 | Bosch Gmbh Robert | |
US3920172A (en) * | 1974-10-03 | 1975-11-18 | Bendix Corp | Conductive glass seal assembly |
JPS572449U (de) * | 1980-06-05 | 1982-01-07 | ||
JPS57119250A (en) * | 1981-01-19 | 1982-07-24 | Nissan Motor Co Ltd | Oxygen sensor element holder |
JPS59104057A (ja) | 1982-12-07 | 1984-06-15 | 松下電器産業株式会社 | ケミカルヒ−トポンプ |
JPS59104057U (ja) * | 1982-12-28 | 1984-07-13 | 松下電器産業株式会社 | 酸素濃度検出器 |
DE19707459A1 (de) | 1997-02-25 | 1998-08-27 | Bosch Gmbh Robert | Dichtung für ein Sensorelement eines Meßfühlers |
DE19707456A1 (de) | 1997-02-25 | 1998-08-27 | Bosch Gmbh Robert | Meßfühler und Verfahren zu dessen Herstellung |
JP3735206B2 (ja) | 1997-12-26 | 2006-01-18 | 日本特殊陶業株式会社 | ガスセンサ |
US20030146093A1 (en) | 2002-02-05 | 2003-08-07 | Kyocera Corporation | Oxygen sensor |
DE10324956B4 (de) * | 2003-06-03 | 2008-03-13 | Robert Bosch Gmbh | Messfühler |
JP4537031B2 (ja) | 2003-09-30 | 2010-09-01 | 京セラ株式会社 | 電気化学セラミック素子ユニットおよび電気化学セラミック素子ユニットの製造方法 |
DE102007018001A1 (de) | 2007-04-17 | 2008-10-23 | Robert Bosch Gmbh | Gassensor zur Bestimmung einer physikalischen Eigenschaft eines Messgases |
JP2009175135A (ja) * | 2007-12-27 | 2009-08-06 | Yamaha Motor Co Ltd | ガスセンサおよびそれを備えた空燃比制御装置ならびに輸送機器 |
DE102008043219A1 (de) * | 2008-10-28 | 2010-04-29 | Robert Bosch Gmbh | Gassensor |
ES2811552T3 (es) * | 2010-10-22 | 2021-03-12 | C Miethke Gmbh&Co Kg | Implante para la medición de la presión intracorporal con transmisión telemétrica del valor de medición |
DE102011009754A1 (de) * | 2011-01-28 | 2012-08-02 | Heraeus Sensor Technology Gmbh | Strömungssensoren mit Stromdurchführung im Deckel und Sensorspitze als Zwischenprodukt |
US20160146779A1 (en) * | 2014-11-21 | 2016-05-26 | Breathometer, Inc. | Pumpless breath analysis system |
US10190895B2 (en) | 2015-03-16 | 2019-01-29 | Ngk Insulators, Ltd. | Method for assembling gas sensor, and gas sensor assembly apparatus |
DE102016003452B4 (de) * | 2016-03-23 | 2023-05-11 | Dräger Safety AG & Co. KGaA | Elektrochemischer Gassensor |
CN110383032B (zh) * | 2016-12-27 | 2022-04-26 | 通用电气基础设施传感有限责任公司 | 用于天然气的便携式水分分析仪 |
US10807670B2 (en) * | 2017-04-21 | 2020-10-20 | Sram, Llc | Bicycle suspension component and analysis device |
DE102020004319A1 (de) * | 2019-07-26 | 2021-01-28 | Löwenstein Medical Technology S.A. | Atemzuganalysator, Beatmungsgerät und Verfahren zur Atemzuganalyse |
-
2017
- 2017-02-13 EP EP17155772.1A patent/EP3361244B1/de active Active
-
2018
- 2018-01-02 JP JP2019543772A patent/JP7090629B2/ja active Active
- 2018-01-02 EP EP18700449.4A patent/EP3580553A1/de not_active Withdrawn
- 2018-01-02 US US16/484,562 patent/US11054378B2/en active Active
- 2018-01-02 CN CN201880009159.6A patent/CN110312931B/zh active Active
- 2018-01-02 WO PCT/EP2018/050062 patent/WO2018145822A1/de active Application Filing
- 2018-01-02 KR KR1020197026755A patent/KR102289281B1/ko active IP Right Grant
- 2018-02-12 TW TW107104900A patent/TWI661194B/zh active
Also Published As
Publication number | Publication date |
---|---|
US20200033282A1 (en) | 2020-01-30 |
TWI661194B (zh) | 2019-06-01 |
EP3361244B1 (de) | 2022-09-14 |
KR20190118613A (ko) | 2019-10-18 |
JP2020506397A (ja) | 2020-02-27 |
US11054378B2 (en) | 2021-07-06 |
TW201840974A (zh) | 2018-11-16 |
KR102289281B1 (ko) | 2021-08-13 |
EP3361244A1 (de) | 2018-08-15 |
CN110312931B (zh) | 2021-11-23 |
JP7090629B2 (ja) | 2022-06-24 |
WO2018145822A1 (de) | 2018-08-16 |
CN110312931A (zh) | 2019-10-08 |
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