WO2018086928A1 - Dispositif de détection pour déterminer au moins un paramètre d'un milieu fluide s'écoulant dans un conduit de mesure - Google Patents

Dispositif de détection pour déterminer au moins un paramètre d'un milieu fluide s'écoulant dans un conduit de mesure Download PDF

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Publication number
WO2018086928A1
WO2018086928A1 PCT/EP2017/077727 EP2017077727W WO2018086928A1 WO 2018086928 A1 WO2018086928 A1 WO 2018086928A1 EP 2017077727 W EP2017077727 W EP 2017077727W WO 2018086928 A1 WO2018086928 A1 WO 2018086928A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
housing
measuring channel
sensor housing
positioning aid
Prior art date
Application number
PCT/EP2017/077727
Other languages
German (de)
English (en)
Inventor
Thomas Schwartzkopff
Michael Rittmann
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2018086928A1 publication Critical patent/WO2018086928A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F5/00—Measuring a proportion of the volume flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
    • G01F1/69—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element of resistive type
    • G01F1/692—Thin-film arrangements

Definitions

  • Sensor arrangement for determining at least one parameter of a fluid flowing through a measuring channel
  • the parameter can basically be any physical and / or chemical property which qualifies or quantifies a flow of the fluid medium.
  • the parameter may be a
  • the sensor element comprises at least one heating element and at least two temperature sensors which are arranged, for example, on the measuring surface of the sensor element.
  • one temperature sensor is usually mounted upstream of the heating element and the other temperature sensor downstream of the heating element. From an asymmetry of the temperature profile detected by the temperature sensors, which is influenced by the flow of the fluid medium, it is possible to deduce a mass flow and / or a volume flow of the fluid medium.
  • H comprehensivefilm Kunststoffmassenmesser are usually designed as plug-in sensors, which are fixed or interchangeable introduced into a flow tube.
  • the flow tube may be an intake tract of an internal combustion engine. It flows through a partial flow of the fluid
  • a bypass channel is formed between the inlet and the outlet of the main channel.
  • the bypass channel may be such
  • the curved section in that it has a curved section for deflecting the partial flow of the medium which has entered through the inlet of the main channel, wherein the curved section in the further course merges into a section in which the sensor element is arranged.
  • the latter section represents the actual measuring channel in which the sensor element is arranged.
  • the sensor carrier can, for example, with a bottom plate made of metal, on which also electronics and, for example, a drive and evaluation circuit with a circuit board as
  • Circuit board can be glued, form a unit.
  • the sensor carrier can be designed as a molded plastic part of an electronic module.
  • Electronic module can be glued, for example, in a device housing.
  • the entire plug-in sensor can usually be closed with lids, for example with a bypass cover, which usually contains the bypass channel completely or at least partially, and with an electronics compartment lid.
  • Influence on the function of the hot film air flow meter An accurate and reproducible positioning of the sensor element in the bypass channel plays thereby a major role in the accuracy of air mass acquisition.
  • a number of assembly and component tolerances result, which influence the position of the sensor element in the bypass channel.
  • the setting accuracy of the sensor element in the sensor carrier and the setting accuracy of the bypass lid on the device housing should be mentioned.
  • the positioning of the bypass cover usually takes place relative to the device housing.
  • Other factors, such as the setting accuracy of the electronic module in the device housing, and component tolerances, for example, the sensor element, the sensor carrier, the electronic module, the device housing or the bypass cover can have an influence on the position of the sensor element relative to the bypass channel.
  • a sensor arrangement for determining at least one parameter of a fluid medium flowing through a measuring channel.
  • a sensor arrangement is basically understood to mean any device which can determine the one parameter and which can generate, for example, at least one measurement signal corresponding to the specific parameter, for example an electrical measurement signal such as, for example, a voltage or a current.
  • the parameter may be, for example, a physical and / or a chemical property of the flowing fluid medium. Also combinations of
  • the parameter may be a flow velocity and / or a mass flow and / or a volume flow.
  • the sensor arrangement can be set up in particular for use in a motor vehicle.
  • the sensor arrangement can be configured as a so-called hot-film air mass meter, which is used, for example, in the
  • other embodiments are possible in principle.
  • the sensor arrangement for determining at least one parameter of a fluid medium flowing through a measuring channel comprising a device housing, in particular an inserted or insertable into a flow tube plug-in sensor, and arranged in the measuring channel sensor element for determining the parameter of the fluid medium.
  • the device housing may in particular comprise the sensor housing described in more detail below and the measuring channel cover which is also described in more detail below.
  • the measuring channel has at least one inlet and at least one outlet.
  • the sensor element is accommodated in a sensor housing.
  • Sensor arrangement has at least one positioning aid.
  • the measuring channel cover is relative to the positioning aid
  • the at least one positioning aid can in particular be part of the device housing of the sensor arrangement.
  • the positioning aid may be wholly or partly part of the sensor housing and / or may be part of the measuring channel cover in whole or in part.
  • any channel which can be flowed through by the fluid medium and in which the sensor array can be at least partially introduced.
  • a device housing is understood in the context of the present invention, any housing which the
  • Sensor assembly can accommodate and / or in which the sensor assembly can be introduced.
  • the device housing may have one or more openings, which may each be closable with one or more lids.
  • a flow tube is basically understood in the context of the present invention, any tube which is flowed through by the medium.
  • any element such as a one-piece
  • the sensor element which is set up to detect at least one measured quantity and / or at least one parameter and to generate, for example, at least one measuring signal, in particular at least one electrical measuring signal.
  • the sensor element can comprise, for example, one or more functional elements and / or act as a carrier of functional elements, such as a sensor membrane, which can serve for example as a measuring surface or as a measuring region, one or more heating elements, at least two temperature sensors, electrodes, leads and / or other functional elements.
  • the sensor element may be configured to determine the at least one fluid medium parameter and / or to generate the electrical measurement signal corresponding to the particular parameter, such as voltage or current.
  • Parameters may be, for example, a physical and / or a chemical property of the flowing fluid medium. Also
  • the parameter may be a flow velocity and / or a mass flow and / or a volume flow.
  • the sensor element may be a sensor chip, for example a silicon sensor chip.
  • an inlet means basically any opening through which the flowing fluid medium can enter the measuring channel.
  • an outlet is basically understood to mean any opening through which the flowing fluid medium can leave the measuring channel.
  • a sensor housing is basically understood to be any housing which can receive the sensor element and / or into which the sensor element can be introduced and / or which can house the sensor element, and which at the same time overflows the sensor element through the flowing fluid Medium allowed.
  • the sensor housing has one or more openings which can be closed with the measuring channel cover. Under one
  • Positioning aid is understood in the context of the present invention basically any device which is suitable, the correct
  • the positioning aid may for example comprise at least one element selected from the group consisting of: a wall contour, a groove, a position mark. A combination of several such elements is possible.
  • the positioning aid can be any element selected from the group consisting of: a wall contour, a groove, a position mark. A combination of several such elements is possible.
  • the positioning aid can be any element selected from the group consisting of: a wall contour, a groove, a position mark. A combination of several such elements is possible.
  • the at least one positioning aid can have at least one positioning aid which is part of the measuring channel cover and at least one positioning aid Positioning aid, which is part of the sensor housing, wherein the positioning aids can be configured complementary to allow common positioning.
  • a measuring channel lid is basically understood to mean any lid which can cover and / or close at least one opening of the sensor housing. Due to the positioning of the measuring channel cover on the sensor housing, the
  • Channel structure of the measuring channel added to the complete measuring channel.
  • a channel structure of the measuring channel is basically understood to mean any shape which at least partially surrounds and / or encloses the measuring channel.
  • the channel structure can thus be understood to mean any shape which at least partially surrounds and / or encloses the measuring channel.
  • the channel structure may have at least one projection and / or at least one recess, which at least in sections follow the course of the measuring channel and form at least one wall of the measuring channel.
  • the at least one positioning aid can in particular have at least one positioning aid of the sensor housing.
  • Positioning aid of the sensor housing may in particular be selected from the group consisting of: a sensor housing wall contour, a sensor housing groove and a sensor housing position mark. Under a wall contour is in the context of the present invention
  • Positioning of a corresponding component in the form is suitable.
  • the positioning aid can thus have, for example, at least one key lock structure.
  • Under a groove is in the context of the present invention, in principle, a depression within a component
  • a position marker is basically understood to mean an arbitrary marking which is detected by an image processing program and assigned to the image Alignment of the device bearing the position mark can be used.
  • the sensor housing wall contour may comprise at least one recess and / or at least one elevation.
  • the at least one positioning aid can continue to have at least one
  • Sensor housing has at least one positioning aid
  • the positioning aid of the measuring channel cover can be designed to be complementary to the positioning aid of the sensor housing.
  • the positioning aid of the measuring channel cover may in particular be selected from the group consisting of: a measuring channel cover wall contour, a measuring channel cover groove and a measuring channel cover position marker.
  • the sensor housing may have at least one sensor housing wall contour and the measurement channel cover may have at least one measurement channel cover wall contour, wherein the
  • Sensor housing and the measuring channel cover can be positively connected.
  • the term "positively connected” is used in the context of the present
  • the sensor housing can at least partially surround the sensor element, so that a measuring surface of the sensor element can be overflowed by the fluid medium.
  • a measuring surface is basically understood to mean any surface of the sensor element which can be exposed to the fluid medium and carries at least one functional element.
  • the sensor element may comprise at least one measuring surface overflowable by the fluid medium with at least one on the
  • Sensor housing may have at least one housing opening, so that a measuring surface of the sensor element can be overflowed by the fluid medium.
  • the sensor element may comprise at least one sensor chip,
  • the measuring channel can be formed partly by the device housing and partly by the channel structure of the measuring channel cover.
  • the sensor arrangement may further include one in an electronics compartment of the device housing
  • an electronics compartment is understood in principle to be an arbitrary section of the equipment housing which has a housing
  • Electronic module in particular the drive and evaluation circuit houses.
  • the sensor element can be electrically connected to the drive and evaluation circuit.
  • the sensor housing can be applied to a circuit carrier, in particular a printed circuit board, wherein the circuit carrier is electrically connected to the drive and evaluation circuit.
  • a circuit carrier is basically understood to mean any substrate which is suitable for carrying an electrical circuit, in particular the drive and evaluation circuit, and / or to which an electrical circuit, in particular the drive and control circuit
  • the circuit carrier may be fixedly mounted in the device housing.
  • the sensor arrangement comprises a device housing, in particular a inserted or insertable into a flow tube plug-in sensor, and arranged in the measuring channel sensor element for determining the parameter of the fluid medium the measuring channel has at least one inlet and at least one outlet.
  • the sensor arrangement has at least one positioning aid.
  • the method comprises the following steps, preferably in the order given. Also a different order is possible. Furthermore, one or more or all of the method steps can also be carried out repeatedly. Furthermore, two or more of the method steps may also be performed wholly or partially overlapping in time or simultaneously. The method may, in addition to the method steps mentioned, also comprise further method steps.
  • the method can be used in particular for producing a sensor arrangement according to the present invention, that is to say according to one of the abovementioned embodiments or according to one of the embodiments described in more detail below. Accordingly, for definitions and optional embodiments, the description of the
  • the measuring channel cover can be positioned on the sensor housing using an image processing program.
  • the measuring channel cover may have at least one measuring channel cover position mark and the sensor housing at least one sensor housing position mark. Furthermore, the positioning of the
  • Meßkanaldeckels on the sensor housing in step d) are performed by at least one of the following steps: dl) positioning using at least one sensor housing wall contour
  • Positional accuracy of the sensor element, for example, the sensor chip to the measuring channel, in particular to the bypass channel, compared to the prior art are improved, for example, compared to sensor assemblies, especially compared to H disclosefileinuftmassenmessern in which the positioning of the Meßkanaldeckels, in particular the bypass cover, relative to the Device housing takes place. It may be possible to achieve a more accurate positioning of the sensor element, for example the sensor chip, in the measuring channel, in particular in the bypass channel, by reducing the components and / or reducing the assembly tolerances.
  • a sensor carrier for example a chip carrier, can be dispensed with as a component.
  • Bypass cover is aligned relative to the sensor element. Furthermore, in the context of the present invention, the measuring channel cover, in particular the bypass cover, which has a channel structure of the measuring channel, in particular the
  • Bypass channel positioned relative to the sensor element. It may thereby be possible to achieve the most accurate possible position of the sensor element in the measuring channel, in particular in the bypass channel.
  • the bypass channel positioned relative to the sensor element.
  • Sensor housing in particular a housing of the sensor element, a
  • Have sensor housing wall contour and the measuring channel cover, in particular the bypass cover, may have a complementary Meßkanaldeckel wall contour, in particular a counter contour.
  • the sensor housing wall contour and the measuring channel cover wall contour may be tool-bound
  • Position of the sensor element for example of the sensor chip, in particular the reduction of the part-to-part scattering in comparison to the prior art, can allow a reduced adjustment effort and thus a cost reduction in comparison to the prior art equal to be achieved tolerances.
  • the sensor housing in particular the housing of the sensor element, have at least one sensor housing position mark, and the
  • Measuring channel cover in particular the bypass cover, may have at least one measuring channel cover position mark, which by means of the
  • Image processing system can be coordinated. Since the position marks are tool-bound positioning aids, in this embodiment, a positioning accuracy can be compared with the
  • Sensor element in particular of the sensor chip, can in comparison to the prior art equal to achieve tolerances allow a reduced adjustment effort and thus a cost reduction.
  • Figure 2A shows an embodiment of an inventive
  • Embodiments of a sensor arrangement according to the invention in a cross-sectional view. Embodiments of the invention
  • FIG. 1 shows an embodiment of a sensor arrangement 110 according to the invention in plan view.
  • Figures 2B, 3A and 4 show one each
  • FIG. 2A shows an embodiment of a sensor arrangement 110 according to the invention in a cross-sectional view.
  • FIGS. 2C and 3B each show a section of two different embodiments of a sensor arrangement 110 according to the invention in a cross-sectional view.
  • the sensor arrangement 110 can be used in particular in a
  • the sensor arrangement 110 can be designed as a so-called hot-film air mass meter, which
  • the sensor arrangement 110 may, in particular, comprise one or more other functional elements, not shown in the figures, such as, for example
  • the sensor arrangement 110 can, for example, in a flow tube, also not shown
  • the sensor arrangement 110 for determining at least one parameter of a fluid medium flowing through a measuring channel 112, in particular an intake air mass of an internal combustion engine, has a device housing 114, in particular a plug-in sensor 116 introduced or insertable into a flow tube, and a sensor element arranged in the measuring channel 112
  • the measuring channel 112 has at least one inlet and at least one outlet.
  • the sensor element 118 is accommodated in a sensor housing 124.
  • Sensor arrangement 124 has at least one positioning aid 126.
  • a measuring channel cover 128 is relative to the aid of the positioning aid 126
  • the measuring channel cover 128 has a
  • FIG. 1 shows a top view of a sensor arrangement 110 according to the invention.
  • the sensor arrangement 110 has a device housing 114, which is designed as a plug-in sensor 116 and can be introduced into a flow tube, not shown. Furthermore, the sensor arrangement 110 has a sensor element 118.
  • Sensor element 118 may comprise at least one sensor chip, in particular at least one silicon sensor chip.
  • the sensor element 118 is accommodated in a sensor housing 124.
  • the sensor element 118 may have at least one measurement surface 132. At least one heating element and at least two temperature sensors can be arranged on the measuring surface 132.
  • the sensor housing 124 may partially surround the sensor element 118, so that the measurement surface 132 of the sensor element 118 can be overflowed by the fluid medium.
  • the sensor housing 124 may have at least one housing opening, so that the measurement surface 132 of the sensor element 118 can be overflowed by the fluid medium.
  • the sensor arrangement 110 can furthermore have a control and evaluation circuit 136 accommodated in an electronics compartment 134 of the device housing 114, as shown in FIG.
  • the sensor element 118 may be electrically connected to the drive and evaluation circuit 136.
  • the sensor housing 124 may be mounted on a circuit substrate 138, in particular a printed circuit board 140, wherein the circuit substrate 138 is electrically connected to the drive and
  • Evaluation circuit 136 may be connected. Furthermore, the circuit carrier 138 may be fixedly mounted in the device housing 114.
  • FIGS. 2A, 2B and 2C show a preferred exemplary embodiment of the sensor arrangement 110 according to the invention with a sensor housing wall contour 142 and a complementary measuring channel cover wall contour 144 as positioning aids 126.
  • the sensor housing wall contour 142 can comprise at least one recess (not shown) and / or at least one not shown Survey include.
  • the measuring channel cover wall contour 144 may include at least one recess, not shown, and / or at least one elevation, not shown.
  • the positioning aid 126 as shown in Figures 3A and 3B, be designed as a sensor housing groove 146.
  • the positioning aid 126 can also be designed as a sensor housing position mark 148 or can comprise one or more sensor housing position marks 148.
  • the Sensor housing 124 may have at least one sensor housing position mark 148, and / or, which is not shown here, the measurement channel cover 128 may have at least one measurement channel cover position mark.
  • the measuring channel cover 128 may have at least one positioning aid 126 complementary to the positioning aid 126 of the sensor housing 124.
  • the complementary positioning aid 126 may be selected from the group consisting of a measuring channel cover wall contour, a measuring channel cover groove and a measuring channel cover position marker. As shown in Figure 2A, the sensor housing wall contour 142 and the
  • Measuring channel cover wall contour 144 mesh.
  • the sensor housing 124 and the measuring channel cover 128 may be positively connected.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

L'invention concerne un dispositif de détection (110) destiné à déterminer au moins un paramètre d'un milieu fluide circulant dans un conduit de mesure (112), en particulier une masse d'air d'admission d'un moteur à combustion interne. Le dispositif de détection (110) comprend un boîtier d'appareil (114), en particulier une sonde enfichable (116) introduite ou pouvant être introduite dans un tube d'écoulement et un élément de détection (118) disposé dans le conduit de mesure (112) et destiné à déterminer le paramètre du milieu fluide. Le conduit de mesure (112) comporte au moins une entrée (120) et au moins une sortie (122). L'élément de détection (118) est logé dans un boîtier de détection (124). Le dispositif de détection (110) comporte au moins un auxiliaire de positionnement (126). Un capot de conduit de mesure (128) peut être positionné par rapport au boîtier de détection (124) à l'aide de l'auxiliaire de positionnement (126). Le capot de conduit de mesure (128) présente une structure (130) du conduit de mesure (112).
PCT/EP2017/077727 2016-11-10 2017-10-30 Dispositif de détection pour déterminer au moins un paramètre d'un milieu fluide s'écoulant dans un conduit de mesure WO2018086928A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016222121.3 2016-11-10
DE102016222121.3A DE102016222121A1 (de) 2016-11-10 2016-11-10 Sensoranordnung zur Bestimmung wenigstens eines Parameters eines durch einen Messkanal strömenden fluiden Mediums

Publications (1)

Publication Number Publication Date
WO2018086928A1 true WO2018086928A1 (fr) 2018-05-17

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PCT/EP2017/077727 WO2018086928A1 (fr) 2016-11-10 2017-10-30 Dispositif de détection pour déterminer au moins un paramètre d'un milieu fluide s'écoulant dans un conduit de mesure

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DE (1) DE102016222121A1 (fr)
WO (1) WO2018086928A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10160831A1 (de) * 2000-12-11 2002-07-18 Unisia Jecs Corp Fluidflussmesser
EP1391699A1 (fr) * 2001-05-24 2004-02-25 Hitachi, Ltd. Debitmetre a resistance chauffante
WO2012055622A1 (fr) * 2010-10-28 2012-05-03 Robert Bosch Gmbh Dispositif capteur pour détecter une propriété d'écoulement d'un milieu fluide
EP3070442A1 (fr) * 2013-11-14 2016-09-21 Hitachi Automotive Systems, Ltd. Capteur de débit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10160831A1 (de) * 2000-12-11 2002-07-18 Unisia Jecs Corp Fluidflussmesser
EP1391699A1 (fr) * 2001-05-24 2004-02-25 Hitachi, Ltd. Debitmetre a resistance chauffante
WO2012055622A1 (fr) * 2010-10-28 2012-05-03 Robert Bosch Gmbh Dispositif capteur pour détecter une propriété d'écoulement d'un milieu fluide
EP3070442A1 (fr) * 2013-11-14 2016-09-21 Hitachi Automotive Systems, Ltd. Capteur de débit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KONRAD REIF: "Sensoren im Kraftfahrzeug, 2. Auflage", 2012, pages: 146 - 148

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