EP3688434A2 - Drucksensor auf keramischen druckstutzen - Google Patents
Drucksensor auf keramischen druckstutzenInfo
- Publication number
- EP3688434A2 EP3688434A2 EP18779645.3A EP18779645A EP3688434A2 EP 3688434 A2 EP3688434 A2 EP 3688434A2 EP 18779645 A EP18779645 A EP 18779645A EP 3688434 A2 EP3688434 A2 EP 3688434A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure sensor
- heating element
- sensor according
- pressure
- heating
- 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- Withdrawn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
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B7/00—Microstructural systems ; Auxiliary parts of microstructural devices or systems
- B81B7/02—Microstructural systems ; Auxiliary parts of microstructural devices or systems containing distinct electrical or optical devices of particular relevance for their function, e.g. microelectro-mechanical systems [MEMS]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/26—Details or accessories
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0042—Constructional details associated with semiconductive diaphragm sensors, e.g. etching, or constructional details of non-semiconductive diaphragms
- G01L9/0044—Constructional details of non-semiconductive diaphragms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0051—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance
- G01L9/0052—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance of piezoresistive elements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
- H05B1/0236—Industrial applications for vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2201/00—Specific applications of microelectromechanical systems
- B81B2201/02—Sensors
- B81B2201/0264—Pressure sensors
Definitions
- Pressure sensor on ceramic discharge nozzle This is a MEMS pressure sensor for use in freezing or highly viscous media, especially for use in automotive technology.
- Falsified measurement can be: Inadequate emission control, engine damage or damage to others
- Internal combustion engines are e.g. necessary to perform accurate pressure measurements immediately after a cold engine start.
- the object is achieved by a pressure sensor according to the
- a pressure sensor is proposed, with which it is possible to measure relative or absolute pressures.
- This comprises a housing, which in turn comprises a housing wall.
- the housing wall can be used for a measurement be sealed an absolute pressure and contain openings for a measurement of the relative pressure, for example
- Atmosphere conditions to use as a reference pressure In the housing are arranged: a sensor element and a
- the sensor element is a component with which a pressure-induced deflection of a membrane is determined. It can be in
- a direct pressure determination using piezoelectric effect or by measuring the elongation of the membrane using e.g.
- the side of the sensor element on which the membrane is located is referred to below as the upper side of the sensor element and the opposite side as the underside of the sensor element.
- the ceramic substrate serves as a support for the sensor element and its electrical connection.
- the electrical connection on the ceramic substrate serves for this purpose a measuring signal from the
- Direct pressure sensor where it is externally processed and the signal is assigned a pressure.
- the sensor element is connected to the ceramic substrate so that both the top and the bottom are accessible to different media.
- the sensor element can be designed as a MEMS component.
- a heating element is part of the
- Pressure sensor It can be at different positions in the
- Pressure sensor to be attached with the purpose to achieve an operating temperature in the pressure sensor, which allows an accurate measurement.
- By heating the pressure sensor possible solid and liquid condensates are thawed, if necessary, evaporated and expelled or baked out of the pressure sensor together with any high-viscosity media that may be present.
- Heating element it is also possible to form a
- the pressure sensor comprises a glass-ceramic tube which is arranged on the underside of the sensor element.
- the glass ceramic tube serves to supply media to the sensor element and is guided through the housing wall, wherein the medium is transported in the interior of the glass-ceramic tube to the underside of the sensor element, or there can come into contact with the sensor. The pressure in the medium is then applied to the sensor element.
- the medium may be enclosed outside the sensor in a closed system. With the glass-ceramic tube, a thermal bridge between the sensor element and the system to be monitored is created and the media properties of pressure and temperature are transferred from the system to be measured to the sensor element.
- the glass-ceramic tube is used for improved sealing of the pressure measurement.
- the pressure sensor includes a gel filling in one
- the Gelbegrenzung is a top and bottom open container which terminates with the membrane of the sensor element at its top and can be filled from above with a gel.
- the heating element is designed, for example, the pressure sensor to a temperature well above the
- a heating to a temperature between 20 ° C and 50 ° C, in particular up to 160 ° C is provided.
- the heating element can be mounted in many different positions. These are all inside the heating element
- the heating element can be arranged
- the heating element is preferably mounted in the vicinity of the electrical connections.
- Ceramic substrate may also be formed as a layered ceramic.
- the heating element can, for example, a
- heating element is in direct contact with components of the housing by gluing, clamping or soldering,
- the heating element may also be integrated in the gel boundary.
- the various embodiments of the heating element may include: a conductive plastic, e.g. when
- Meander shaped resistor or a resistor with positive temperature coefficient The advantage of a possible meandering form of resistance is that of
- Resistance is longer and therefore has a higher value, resulting in a higher heating power.
- an external control of a heating power of the heating element is no longer necessary.
- the heating element is integrated in the housing of the sensor and can microwaves
- Such a heating element can also be arranged at a different location of the sensor.
- a supply of heating power can take place via different ways. There are e.g. the possibility of the power supply of the pressure sensor, as well as the variant of an additional and independent of the sensor element
- the separation of the power supply has the advantage that the measurement signals are not affected.
- the pressure sensor may comprise a further heating element in one of the illustrated designs. This can be attached to one of the described positions, but from the position of the first
- Heating element is different. By using several heating elements, the pressure sensor can be heated more homogeneously and thus more efficiently.
- the pressure sensor described above is for example for use in a motor vehicle, in particular for use in the exhaust gas region of a motor vehicle designed, for example in the range of a diesel particulate sensor or a urea sensor.
- the heating element is used to heat up the
- Operating temperature is a first pressure measurement.
- the heating element is used to reduce energy consumption
- Figure 1 shows the schematic sectional view of a
- Pressure sensor DS with different positions for one or more heating elements and their relative relation to other components of the pressure sensor.
- Figure 2 shows the schematic sectional view of a
- Housing GH comprises a housing wall GW, a ceramic substrate KS located inside the housing, a sensor element SE embedded in the ceramic substrate, a glass ceramic tube GR on the underside of the sensor element and a gel filling GF in a gel boundary GB on the upper side of the sensor element.
- Heating element are as follows: The heating element can be any heating element.
- Figure 2 shows an enlarged sectional view
- Sensor element SE Here, a membrane of the sensor element MS can be seen, which forms the upper side OS of the sensor element here. Opposite the upper side is a lower side US of the sensor element, in which there is a media passage MG to the membrane of the sensor element MS.
- the shape of the sensor element illustrated in FIGS. 1 and 2 is only an example. It can also be other forms or
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017122631.1A DE102017122631A1 (de) | 2017-09-28 | 2017-09-28 | Drucksensor auf keramischen Druckstutzen |
| PCT/EP2018/076313 WO2019063714A2 (de) | 2017-09-28 | 2018-09-27 | Drucksensor auf keramischen druckstutzen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3688434A2 true EP3688434A2 (de) | 2020-08-05 |
Family
ID=63713876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18779645.3A Withdrawn EP3688434A2 (de) | 2017-09-28 | 2018-09-27 | Drucksensor auf keramischen druckstutzen |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20200256751A1 (de) |
| EP (1) | EP3688434A2 (de) |
| JP (1) | JP2020535411A (de) |
| CN (1) | CN111108360A (de) |
| DE (1) | DE102017122631A1 (de) |
| WO (1) | WO2019063714A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021110919A1 (de) | 2021-04-28 | 2022-11-03 | Heinz Plöchinger | Sensor-Anordnung mit Schutz- und Heizfunktion |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2169373A2 (de) * | 2008-09-26 | 2010-03-31 | Metallux AG | Drucksensor zur Differenzdruckmessung |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3028188A1 (de) * | 1980-07-25 | 1982-02-25 | Robert Bosch Gmbh, 7000 Stuttgart | Sensor |
| JPS5776431A (en) * | 1980-10-30 | 1982-05-13 | Toshiba Corp | Semiconductor ressure transducer |
| JPH02124527U (de) * | 1989-03-24 | 1990-10-15 | ||
| US5625152A (en) * | 1996-01-16 | 1997-04-29 | Mks Instruments, Inc. | Heated pressure transducer assembly |
| JP4712220B2 (ja) * | 2001-05-02 | 2011-06-29 | 大亜真空株式会社 | 圧力測定装置 |
| US7347099B2 (en) * | 2004-07-16 | 2008-03-25 | Rosemount Inc. | Pressure transducer with external heater |
| DE102005029841B4 (de) * | 2004-07-28 | 2013-09-05 | Robert Bosch Gmbh | Mikromechanischer Drucksensor mit beheiztem Passivierungsmittel und Verfahren zu seiner Steuerung |
| US7201057B2 (en) * | 2004-09-30 | 2007-04-10 | Mks Instruments, Inc. | High-temperature reduced size manometer |
| US7124640B1 (en) * | 2005-07-13 | 2006-10-24 | Mks Instruments, Inc. | Thermal mounting plate for heated pressure transducer |
| JP4563312B2 (ja) * | 2005-12-05 | 2010-10-13 | 株式会社堀場エステック | 静電容量式圧力センサ装置 |
| WO2008154760A1 (de) * | 2007-06-19 | 2008-12-24 | Inficon Gmbh | Vakuummesszellenanordnung mit heizung |
| JP2009058366A (ja) * | 2007-08-31 | 2009-03-19 | Nissan Motor Co Ltd | 圧力検出装置 |
| DE102008002579A1 (de) * | 2008-06-23 | 2009-12-24 | Robert Bosch Gmbh | Mikro-elektromechanisches Sensorelement |
| US8186226B2 (en) * | 2009-12-09 | 2012-05-29 | Honeywell International Inc. | Pressure sensor with on-board compensation |
| JP2012189349A (ja) * | 2011-03-09 | 2012-10-04 | Seiko Epson Corp | 流速センサー |
| CH704815A1 (de) * | 2011-03-30 | 2012-10-15 | Inficon Gmbh | Gasdruckmesszellenanordnung. |
| DE102012223879A1 (de) * | 2012-12-20 | 2014-07-10 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben eines Drucksensors einer Abgasnachbehandlungseinrichtung eines Kraftfahrzeugs |
| DE102014207480A1 (de) * | 2014-04-17 | 2015-10-22 | Robert Bosch Gmbh | Vorrichtung zum Erfassen eines Parameters eines Gases, Verfahren zum Betreiben einer derartigen Vorrichtung und Messsystem zum Bestimmen eines Parameters eines Gases |
| DE102015121625A1 (de) * | 2015-12-11 | 2017-06-14 | Endress+Hauser Gmbh+Co. Kg | Verfahren zur Herstellung einer Druckmesseinrichtung |
| CN205785659U (zh) * | 2016-06-15 | 2016-12-07 | 马鞍山市亿格仪表有限公司 | 一种新型防冻防盗压力表 |
-
2017
- 2017-09-28 DE DE102017122631.1A patent/DE102017122631A1/de active Pending
-
2018
- 2018-09-27 EP EP18779645.3A patent/EP3688434A2/de not_active Withdrawn
- 2018-09-27 JP JP2020517295A patent/JP2020535411A/ja not_active Ceased
- 2018-09-27 US US16/629,663 patent/US20200256751A1/en not_active Abandoned
- 2018-09-27 CN CN201880063244.0A patent/CN111108360A/zh active Pending
- 2018-09-27 WO PCT/EP2018/076313 patent/WO2019063714A2/de not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2169373A2 (de) * | 2008-09-26 | 2010-03-31 | Metallux AG | Drucksensor zur Differenzdruckmessung |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111108360A (zh) | 2020-05-05 |
| WO2019063714A3 (de) | 2019-05-16 |
| US20200256751A1 (en) | 2020-08-13 |
| DE102017122631A1 (de) | 2019-03-28 |
| WO2019063714A2 (de) | 2019-04-04 |
| JP2020535411A (ja) | 2020-12-03 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
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| 18D | Application deemed to be withdrawn |
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