EP3014230A1 - Procédé et dispositif de détermination de la température d'un gaz qui s'écoule sur une sonde de mesure - Google Patents

Procédé et dispositif de détermination de la température d'un gaz qui s'écoule sur une sonde de mesure

Info

Publication number
EP3014230A1
EP3014230A1 EP14724090.7A EP14724090A EP3014230A1 EP 3014230 A1 EP3014230 A1 EP 3014230A1 EP 14724090 A EP14724090 A EP 14724090A EP 3014230 A1 EP3014230 A1 EP 3014230A1
Authority
EP
European Patent Office
Prior art keywords
temperature
sensor
signal
housing
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.)
Ceased
Application number
EP14724090.7A
Other languages
German (de)
English (en)
Inventor
Rolf Reischl
Andreas Kuehn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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 EP3014230A1 publication Critical patent/EP3014230A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/20—Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
    • G01K13/024—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow of moving gases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/42—Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
    • G01K7/427—Temperature calculation based on spatial modeling, e.g. spatial inter- or extrapolation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2205/00—Application of thermometers in motors, e.g. of a vehicle
    • G01K2205/02—Application of thermometers in motors, e.g. of a vehicle for measuring inlet gas temperature

Definitions

  • the present invention relates to a method for determining a temperature of a gas flowing past a sensor, to a corresponding device and to a corresponding device
  • An air or sensor (as it is referred to by the abbreviation Tlf below) has the primary task to measure the temperature of a sensor chip and thus to control the excess temperature of the air sensor membrane.
  • the chip temperature is highly dependent on the temperature of the through- or overflowing air. Therefore, use of such an element is also close as an air temperature sensor.
  • such a sensor does not necessarily meet the requirements for a
  • Intake air temperature measurement as used for example for the measurement of a temperature of a sucked by an internal combustion engine air.
  • the causes for this are the close thermal coupling of the sensor to the plug-in sensor housing and the high thermal
  • the present invention provides a method for determining a temperature of a gas flowing past a sensor, furthermore a device which uses this method and finally a corresponding computer program product according to FIGS Main claims presented.
  • Advantageous embodiments emerge from the respective subclaims and the following description.
  • the approach presented here provides a method for determining a temperature of a gas flowing past a sensor, wherein the
  • Sensor is arranged in or on a housing, the method comprising the following steps:
  • Reading a probe signal and a case signal wherein the probe signal represents a temperature of the probe and the case signal represents a temperature of the case;
  • Sensor signal the housing signal and one of a material and / or a shape of the housing dependent (for example) prior art thermal resistance of the housing.
  • the approach presented here provides a device for determining a temperature of a gas flowing past a sensor, the sensor being arranged in or on a housing, the device having the following features:
  • the present invention thus provides a device which is designed to correspond to the steps of a variant of a method presented here
  • a device in the form of a device, the object underlying the invention can be solved quickly and efficiently.
  • a device can be understood as meaning an electrical device which processes sensor signals and, in dependence thereon, controls and / or outputs data signals.
  • the device may have an interface, which may be formed in hardware and / or software.
  • the interfaces can be part of a so-called system ASIC, for example, which contains a wide variety of functions of the device.
  • system ASIC for example, which contains a wide variety of functions of the device.
  • the interfaces have their own, integrated circuitry
  • Circuits are or at least partially consist of discrete components.
  • the interfaces may be software modules that are present, for example, on a microcontroller in addition to other software modules.
  • An advantage is also a computer program product with program code, which on a machine-readable carrier such as a semiconductor memory, a
  • Hard disk space or an optical memory can be stored and used to carry out the method according to one of the embodiments described above, when the program product on a
  • a sensor can be understood as meaning a sensor, in particular a temperature sensor or in general a sensor which provides a sensor signal which determines a temperature at a measuring surface or surface of the sensor
  • a housing signal may be understood as a signal provided by a temperature sensor measuring a temperature of the housing in or on which the sensor is located or mounted.
  • a thermal resistance can be understood to mean a (thermal) resistance between the sensor and the temperature sensor providing the housing signal, which prevents or prevents a propagation of heat in a material.
  • the material may be formed in a specific shape or shape, which causes a particularly unfavorable transmission of heat, such as a dilution of the material at a certain point in the housing.
  • Temperature sensors can be detected. This can be exploited that upon a change in temperature at a temperature sensor, such as in the present case the sensor, a heat flow to the second temperature sensor, here the temperature sensor located in the housing or housing determined and from this a conclusion on the application of the first
  • Temperature sensor (here the probe) can be pulled with heat.
  • an embodiment of the present invention wherein in the step of determining the temperature is determined using a thermal resistance of the gas flowing past the sensor, wherein in particular the thermal resistance is formed by a heat transfer from a gas overflowed solid.
  • a thermal resistance of the gas flowing past the sensor wherein in particular the thermal resistance is formed by a heat transfer from a gas overflowed solid.
  • passing gas can be pulled.
  • the step of determining the temperature of the gas is determined using the thermal resistance, which is determined by a flow parameter of the am
  • Sensor of gas flowing past in particular the speed of the gas flowing past the sensor is dependent.
  • the flow parameter of the gas flowing past the sensor can be read in in the step of reading in and, in the step of determining, the temperature of the gas can be determined as a function of the flow parameter.
  • Embodiment of the present invention offers the advantage of a particularly Precise determination of the thermal resistance of the gas flowing past the sensor, which also ensures a particularly precise
  • an embodiment of the present invention in which the temperature of the gas is determined using an empirically determined temperature offset at the sensor), in particular wherein the temperature offset is dependent on an air mass and / or a temperature of the sensor.
  • Such an embodiment of the present invention offers the advantage that, when determining the temperature offset at the measuring sensor, it is also possible to draw an accurate conclusion as to the air inertia-dependent thermal inertia (time constant) of the measuring sensor.
  • the sensor signal can be filtered by further processing, in particular high-pass filtering, in the step of determining, in accordance with a further embodiment of the present invention.
  • Such a fast-transient measuring system can be implemented in a particularly technically simple manner when, in the step of determining the
  • Sensor signal is differentiated to obtain a differentiated sensor signal, wherein the temperature of the gas based on a sum signal from a sum of the sensor signal and the differentiated
  • the time constant of the high-pass filter is dimensioned so that it is not smaller than the time dependent on the air mass time constant of the filtered temperature signal Tlf. This ensures that the system settles aperiodically during temperature changes. Therefore, the time constant should be changed depending on the air mass.
  • Embodiment of the present invention in the step of Bekainsin the sum signal are differentiated to obtain a differentiated sum signal, and wherein the temperature of the gas based at least on the basis of a further sum signal from a sum of the sum signal and the differentiated sum signal is determined.
  • the temperature of the gas can be determined particularly accurately when looking at thermal material parameters of components of the sensor
  • the step of determining the temperature of the gas can be determined using information about a composition or at least a component of the gas.
  • FIG. 1 is a block diagram of a vehicle in which an embodiment of a device for determining a temperature of a gas flowing past a sensor is used;
  • FIG. 2 shows a perspective view of a thermal sensor with a device for determining a temperature of a gas flowing past a sensor
  • Fig. 3 is an illustration of a thermal sensor for use in
  • 4A is an equivalent circuit diagram for explaining the flow of a heat flow according to an embodiment of the present invention.
  • 7B is a further diagram for explaining the temperature profiles when using an embodiment of the presented here
  • Fig. 1 shows a block diagram of a vehicle 100, in which a
  • Embodiment of an apparatus 1 10 for determining an (actual) temperature Tans of a flowing past a sensor 120 gas 130 is used.
  • the sensor 120 is arranged in an air intake duct 135 of an intake air (as gas) for an internal combustion engine 140 of the vehicle 100.
  • the sensor 120 supplies a sensor signal 145 to a
  • this sensor signal 145 represents a temperature of the sensor 120 itself, which is flowed around by the gas 130. Furthermore, the sensor 120 is fixed to a housing 155, wherein a housing sensor 160 is further provided, which has a
  • the housing 155 Detects temperature of the housing 155 and outputs a temperature of the housing 155 representing the housing signal 165.
  • the housing 155 is heated by the motor and electrical power loss of the sensor electronics and can at least partially flows around the gas 130 and thus also through the
  • Gas 130 is heated or cooled.
  • the housing signal 165 also becomes read via the interface 150 of the device 1 10 for determining the temperature.
  • the sensor 120 and the housing sensor 160 and the associated housing 155 may be part of a further sensor as a thermal sensor 167, for example, one or more parameters of the intake air or the gas 130 measures, such as the amount or
  • the signals read in by interface 150 i. H. the
  • the sensor signal 145 and the housing signal 165 are applied to a detection unit 170 which determines the temperature of the gas 130 (here the intake air) using the sensor signal 145 and the housing signal 165, i. H. calculated and output TansR as a corresponding signal.
  • This signal which represents this temperature Tan of the gas 130, is then fed to an engine control unit 175, which determines, for example, a desired change in the fuel mixture to be supplied to the internal combustion engine 140 or a changed injection quantity of fuel into one or more components of the internal combustion engine 140. This change of the engine 140 to be supplied
  • Fuel mixture or changed injection amount of fuel into one or more components of the engine 140 may now be transmitted via a corresponding control signal 180 from the engine control unit 175 to the engine 140. This allows the
  • Engine 140 are controlled or regulated. In this way, an optimal mode of action or fuel utilization by the
  • Internal combustion engine 140 can be achieved.
  • FIG. 2 shows a perspective view of a thermal sensor 167 with the intake air duct 135, the measuring sensor 120 and the device 110 for determining the temperature of the gas 130.
  • the housing sensor 160 is not explicitly illustrated in FIG. 2. It is located in the ASIC TLF100 in the middle of the PCB.
  • FIG. 3 shows a schematic illustration of the air mass sensor 167 with the measuring sensor 120. It can be seen that the measuring sensor 120 is located outside the housing 155 on a carrier element 310 and projects into the flow of the intake air 130.
  • the air mass sensor 167 has a heated membrane 320 to air mass measurements in different
  • the measuring sensor 120 has a temperature-dependent resistor Rlf, which is a heat flow or a heating curve of the temperature of the sensor 120 at a
  • the carrier element 310 is glued flat in the housing 155, so that the measuring sensor 120 has a thermal connection to the housing 155.
  • Fig. 4 shows in the partial figures 4A and 4B a schematic representation of the procedure for determining the temperature of the gas.
  • a path of a heat flow from the gas 130 past the measuring probe 120 into the housing 155 is shown schematically in FIG. 4A.
  • the gas 130 is shown with the temperature Tans, which in a
  • the sensor 120 which has the temperature TlfR. From the sensor 120 then flows a heat flow through the thermal resistance Rg of the housing to the housing sensor 160, which measures a temperature TgR.
  • Tans TfIR + (TfIR - TgR) * FR - Pm * Rans, or
  • Tans TfIR + (TfIR - TgR) * FR - Pm * Rg * FR,
  • LM is the mass of air in [kg / h] sucked in by the engine and measured by the CMF sensor.
  • a membrane Si-oxide 2 ⁇ thick
  • the cooling by the moving air detunes the temperature profile of the membrane and thus a resistor bridge located on the membrane of temperature-dependent resistors.
  • the bridge voltage is called
  • Pm is the heat output (heat output), which flows from the membrane to the CMF chip (Si: 0.4 mm thick) and generates a temperature offset dTm at the air sensor RIf, which overlaps the temperature divider. That's why this one has to
  • the typical dTm is determined empirically by measurement and, if necessary, corrected by partial measurement by measuring electrical characteristics.
  • the determined temperature of the gas TansR should correspond quite accurately to the actual temperature of the gas.
  • the tans defines the intake air temperature (as it really is) and TansR the calculated intake air temperature (the result of our evaluation), where R is taken into account.
  • 4B shows a temperature profile over time at a temperature drop between the housing temperature Tg and the (cooled)
  • Fig. 5 shows a schematic representation of a procedure for
  • Processing module 515 executed in which a low-pass filtering of the sensor 120 supplied by the signal (sensor signal 145, Tlf) is performed. Following this, the low-pass filtered sensor signal TfITP is subjected to a first high-pass filtering in a further processing module 520 (this first high-pass filtering being dependent on the parameters LM and Tfl) and subsequently a second low-pass filtering in another
  • this second high-pass filtering is also dependent on the parameters LM and Tfl.
  • the resulting signal is provided as TflHP2 to the unit 170 for determining.
  • a second processing branch is first in a first
  • Processing module 530 is carried out a calibration of the housing sensor 160 or the housing signal 165 or Tg, whereupon in a subsequent processing module 535 a low-pass filtering of the housing signal Tg to a signal TgTP and in another processing module 540 a correction of
  • Low-pass filtered housing signal TgTP to a corrected housing signal TgK taking into account the variables LM, Uh and Tfl done.
  • the corrected case signal TgK is now also used to determine the temperature TansR of the gas, for example, using the relationship indicated in the unit 170.
  • the unit 170 receives a value FR as described above from an FR determination unit 545 and a value dTm from a dTm determination unit 150 is used.
  • the variable dTm designates here. dTm is the one caused by Pm
  • the approach proposed here has the objective of determining the influence of
  • the temperature sensor used here is used together with a dynamic compensation (slope steepening) with a constant time constant.
  • Temperature difference dT tsh-tans indicates the value of tans.
  • Compensation is adjusted via air mass and tans.
  • Housing temperature can be detected. This is in the here presented
  • Thermal sensor 167 through here an integrated in the evaluation IC 170
  • an analog temperature signal in this case the silicon temperature of the sensor 120
  • the calibrated signal represents the case temperature and is provided to a processor (DSP) 170 for further billing. This results in a temperature divider
  • Rgeh is the resulting thermal resistance between the
  • Temperature measuring point Tlf and the temperature measuring point Tgeh are determined by the mechanical structure (shape and material).
  • Rtans is the thermal resistance between Tans and the digitized and calibrated temperature measuring point Tlf. Rtans gets through the
  • TansR TansR
  • a filter circuit slope steepening in the thermosensor 167.
  • Tlf is mathematically differentiated (high pass) and the result is added to Tlf. This process can be repeated in several stages, as shown in FIG. 6 with a single repetition. To avoid overshoot, the time constant should be every
  • 7A shows a diagram of an air temperature change from 80 ° C. to 22 ° C. with an intake air quantity of 120 kg / h flowing past the sensor, the time being shown on the abscissa and the temperature and curves on the ordinate, and a temperature curve as the measurement curves of the
  • FIG. 7A represents the temperature TansR determined with the approach presented here. It can be seen from Fig. 7A that the temperature of the gas determined with the approach presented here (ie, here the intake air) has a rapid transient response, so that the determined temperature
  • TansR of gas quickly reaches a very realistic value.
  • FIG. 7B the same curve progressions as in FIG. 7A are plotted in a same coordinate system, with the curves now depicting measurement or determination values for an intake air quantity of 240 kg / h flowing past the sensor. It can be seen that now by the larger at
  • FIG. 8 shows a flowchart of a method 800 for determining a temperature of a gas flowing past a sensor. The procedure
  • the 800 includes a step 810 of reading in a probe signal and a case signal, wherein the probe signal is a temperature of the probe
  • the method 800 includes a step 820 of determining the temperature of the gas using the
  • an exemplary embodiment includes a "and / or" link between a first feature and a second feature, this is to be read such that the
  • Embodiment according to an embodiment both the first feature and the second feature and according to another embodiment, either only the first feature or only the second feature.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Measuring Volume Flow (AREA)

Abstract

L'invention concerne un procédé (800) de détermination de la température (TansR) d'un gaz (130) qui s'écoule sur une sonde de mesure (120) disposée dans ou sur un boîtier (155). Le procédé comprend une étape de lecture (810) d'un signal de sonde de mesure (145) et d'un signal de boîtier (165), le signal de sonde de mesure (145) représentant une température (Tfl) de la sonde de mesure (120) et le signal de boîtier (165) représentant une température (Tgeh, Tg) du boîtier (155). En outre, le procédé (800) comprend une étape de détermination (820) de la température (TansR) du gaz (130) en utilisant le signal de sonde de mesure (145), le signal de boîtier (165) et une résistance thermique (Rg, Rgeh) du boîtier (155) qui est fonction de la matière et/ou de la forme dudit boîtier (155).
EP14724090.7A 2013-06-25 2014-05-15 Procédé et dispositif de détermination de la température d'un gaz qui s'écoule sur une sonde de mesure Ceased EP3014230A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013212013.3A DE102013212013A1 (de) 2013-06-25 2013-06-25 Verfahren und Vorrichtung zur Bestimmung einer Temperatur eines an einem Messfühler vorbeiströmenden Gases
PCT/EP2014/059955 WO2014206633A1 (fr) 2013-06-25 2014-05-15 Procédé et dispositif de détermination de la température d'un gaz qui s'écoule sur une sonde de mesure

Publications (1)

Publication Number Publication Date
EP3014230A1 true EP3014230A1 (fr) 2016-05-04

Family

ID=50729509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14724090.7A Ceased EP3014230A1 (fr) 2013-06-25 2014-05-15 Procédé et dispositif de détermination de la température d'un gaz qui s'écoule sur une sonde de mesure

Country Status (5)

Country Link
US (1) US10031029B2 (fr)
EP (1) EP3014230A1 (fr)
JP (1) JP6461935B2 (fr)
DE (1) DE102013212013A1 (fr)
WO (1) WO2014206633A1 (fr)

Cited By (1)

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CN109990440A (zh) * 2019-04-16 2019-07-09 珠海格力电器股份有限公司 控制器温度补偿方法、装置及控制器

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JP6464709B2 (ja) * 2014-12-09 2019-02-06 株式会社デンソー エアフロメータ
WO2019021762A1 (fr) * 2017-07-24 2019-01-31 株式会社デンソー Dispositif de mesure de quantité physique et dispositif de commande de mesure
JP7013852B2 (ja) * 2017-07-24 2022-02-01 株式会社デンソー 物理量計測装置及び物理量計測装置の製造方法
DE102017216656A1 (de) * 2017-09-20 2019-03-21 Robert Bosch Gmbh Verfahren und Vorrichtung zum Steuern eines Heizelements eines Sensorelements eines Luftmassensensors für ein Fahrzeug und Luftmassensensorsystem für ein Fahrzeug
JP2019135465A (ja) * 2018-02-05 2019-08-15 株式会社デンソー センサ装置
US11495987B2 (en) 2020-05-22 2022-11-08 Medtronic, Inc. Wireless recharging devices and methods based on thermal boundary conditions

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JP4963052B2 (ja) * 2006-09-22 2012-06-27 Ｕｄトラックス株式会社 排気温度センサの異常検出装置
JP5350413B2 (ja) 2011-01-31 2013-11-27 日立オートモティブシステムズ株式会社 吸気温度センサおよびそれを有する熱式空気流量計
JP5784989B2 (ja) * 2011-05-31 2015-09-24 株式会社クボタ エンジンの排熱温度検出装置
JP6092216B2 (ja) * 2011-08-23 2017-03-08 ストーンリッジ・インコーポレッド 振動低減および／または改善スリーブを含む排気ガス温度センサ
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Publication number Priority date Publication date Assignee Title
CN109990440A (zh) * 2019-04-16 2019-07-09 珠海格力电器股份有限公司 控制器温度补偿方法、装置及控制器

Also Published As

Publication number Publication date
US20160146674A1 (en) 2016-05-26
JP6461935B2 (ja) 2019-01-30
JP2016523368A (ja) 2016-08-08
DE102013212013A1 (de) 2015-01-08
WO2014206633A1 (fr) 2014-12-31
US10031029B2 (en) 2018-07-24

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