EP3749938A1 - Procédé et dispositif permettant le contrôle de vraisemblance des valeurs de mesure d'un capteur d'humidité - Google Patents

Procédé et dispositif permettant le contrôle de vraisemblance des valeurs de mesure d'un capteur d'humidité

Info

Publication number
EP3749938A1
EP3749938A1 EP19701627.2A EP19701627A EP3749938A1 EP 3749938 A1 EP3749938 A1 EP 3749938A1 EP 19701627 A EP19701627 A EP 19701627A EP 3749938 A1 EP3749938 A1 EP 3749938A1
Authority
EP
European Patent Office
Prior art keywords
sensor
humidity
measuring element
temperature
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Withdrawn
Application number
EP19701627.2A
Other languages
German (de)
English (en)
Inventor
Christian Rätscher
Jürgen Kranz
Josef Tratz
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.)
Audi AG
Original Assignee
Audi AG
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 Audi AG filed Critical Audi AG
Publication of EP3749938A1 publication Critical patent/EP3749938A1/fr
Withdrawn legal-status Critical Current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
    • G01K15/00—Testing or calibrating of thermometers
    • G01K15/007—Testing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00785—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models by the detection of humidity or frost
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00792—Arrangement of detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00978—Control systems or circuits characterised by failure of detection or safety means; Diagnostic methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00—Testing or calibrating of thermometers

Definitions

  • the invention relates to a method for checking the plausibility of the measured values of a humidity sensor in a motor vehicle and to an apparatus for carrying out the method.
  • humidity sensors and temperature sensors are used to record the climate outside the vehicle. This environmental information is provided to ECUs for further internal use (climate control unit, engine control unit, combination instrument, etc.).
  • the signals are no longer checked for plausibility.
  • Sensor information such as outdoor temperature and humidity, but z. B. have a direct influence on the start / stop cycles in vehicle operation and thus indirectly affect fuel consumption. The signals must therefore be made plausible in the future. This could be achieved, for example, by an additional sensor, but this would increase the cost.
  • DE 102 54 485 B4 discloses a motor vehicle in which an engine control device with a temperature sensor arranged close to the engine detects the intake air temperature and, based thereon, closes the ambient air temperature.
  • the engine control device communicates with at least one second sensor arranged outside the engine and carries out a plausibility check of the temperature value supplied by this second temperature sensor on the basis of the temperature value supplied by the engine-near temperature sensor.
  • Other methods for checking the plausibility of the measured values of various sensors used in motor vehicles have also become known.
  • DE 10 2007 005 498 A1 discloses a motor vehicle air conditioning system with a refrigerant circuit in which a temperature sensor is located in the region between the compressor and the gas cooler, which is used to monitor the refrigerant quantity of the refrigerant circuit.
  • the monitoring device comprises a characteristic diagram for the distinction of plausible values and non-plausible values of the temperature measured by the temperature sensor as a function of a further measured value, for example.
  • the refrigerant pressure the air temperature after the compressor, the air temperature after the evaporator, the air volume of the air conditioning blower, the ambient temperature, the compressor speed, the compressor drive, the vehicle speed, the internal temperature, solar radiation or humidity.
  • the measured temperature is checked to see if it is plausible under the given operating conditions and parameters.
  • EP 1 327 138 B1 discloses a method for the self-diagnosis of an NO x sensor arranged in an exhaust system of an internal combustion engine.
  • determined values of the lambda signal are compared with lambda values of the exhaust gas which are plausible at given operating parameters.
  • a first NO x - sensor diagnostic signal is formed.
  • This is compared with plausible values of the NO x concentration given given operating parameters, and a second NO x sensor diagnostic signal is formed as a function of the comparison result.
  • a particularly comprehensive diagnosis is achieved if the comparison of the values of the lambda, NO x , pump cell or temperature signal takes place with the NO-sensor being heated and with the NO x being heated.
  • the present invention has the object to provide a method and a device for plausibility of Measured values of an air humidity measuring element in a motor vehicle for
  • the invention relates to a method for checking the plausibility of the measured values of a humidity measuring element containing a humidity sensor and a temperature sensor in a motor vehicle, comprising the following steps:
  • sensor signals of a humidity measuring element are plausibilized by first a state variable, for example, the absolute humidity, the dew point or the energy content of the air (the enthalpy of air), from a sensor signal on a the humidity sensor containing the humidity sensor is calculated from the air temperature and the relative humidity.
  • a state variable for example, the absolute humidity, the dew point or the energy content of the air (the enthalpy of air)
  • the temperature of the humidity measuring element is temporarily changed by heating or cooling it (for example by means of an internal sensor heating or a sensor cooling). This changes the measured air temperature at the humidity measuring element and at the same time the measured relative humidity.
  • the state variable is calculated from the air temperature and the relative air humidity measured with the humidity-measuring element having a changed temperature, so that a comparison with the values before heating up is possible.
  • a deviation there is, for example, a defect in the humidity measuring element (for example, the humidity sensor or the temperature sensor).
  • an indirect path is taken via the calculation of the energy content of the air under various forced operating conditions.
  • the inventive method can even plausibilize the individual elements of the humidity measuring element on the basis of physical transformation by back transformation.
  • the relative humidity indicates what percentage of the maximum water vapor content the air contains. At constant absolute humidity, the relative humidity drops with increasing temperature (and vice versa).
  • the dew point is defined as the temperature at which the current water vapor content in the air is at its maximum (100% relative humidity).
  • Humidity i. calculate the water content of the air in grams of water vapor per cubic meter and the dew point in degrees Celsius.
  • the plausibility cycle is performed in stop-and-go traffic when no immediate change in environmental conditions is expected.
  • a plausibility check is performed during operation.
  • the plausibility check is then carried out for statistical protection with several cycles.
  • the humidity measuring element is temporarily heated or cooled at time t1 for a plausibility cycle.
  • the heating is performed by an internal sensor heater.
  • the heating is carried out by external components such as heating elements.
  • these are usually not needed, since available humidity measuring elements are usually equipped with an internal sensor heating.
  • cooling is accomplished by internal sensor cooling.
  • the cooling is carried out by external components such as cooling elements. As a result of the cooling, the air temperature at the sensor element also drops, and thus the measured relative air humidity at the sensor element increases at constant ambient conditions.
  • Steps a) to d) alone do not yet permit a clear conclusion as to the correctness of the signals, since an absolute change of the signals becomes visible, but this can not yet be quantitatively evaluated. Therefore, a further step is necessary, namely the calculation of the state variable, ie the absolute humidity, the dew point or the enthalpy, from those with the one changed temperature 8th
  • Humidity measuring element measured at time t2 for
  • the calculated state variable at time t2 is now compared with that at time t0.
  • the state variables calculated for the two times must agree within the measurement tolerance or must differ by no more than a predetermined percentage.
  • the values may not differ by more than 20% based on the value calculated for tO.
  • the values may not differ by more than 10%, preferably not more than 5%, in particular not more than 3%, based on the value calculated for tO.
  • the invention also relates to a device for plausibility of the measured values of a humidity measuring element in a motor vehicle.
  • the device comprises a humidity measuring element containing a humidity sensor and a temperature sensor, as well as a sensor heater or a sensor cooling.
  • the humidity sensing element includes an internal sensor heater.
  • the device has an external sensor heating, for example a heating element arranged outside the air humidity measuring element, which is set up to heat the humidity measuring element.
  • the humidity sensing element includes internal sensor cooling.
  • the Device on an external sensor cooling, for example, a arranged outside of the humidity measuring element cooling element, which is adapted to cool the humidity measuring element.
  • the apparatus further comprises a unit adapted to
  • the unit is further configured to control the sensor heating or sensor cooling and to heat or cool the humidity measuring element.
  • the unit is also set up from the measurement signals of the
  • Humidity sensor and the perimeter sensor Measured values for relative
  • the state variable is the absolute humidity.
  • Embodiment is the state quantity of the dew point.
  • the state quantity is the energy content of the air (the enthalpy of air).
  • the unit is further adapted to compare the values of the state variable calculated at different times with one another and, if the values do not agree, to conclude a defect of the humidity measuring element.
  • the unit is configured to determine through logic links which of the sensor information is erroneously detected.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

L'invention concerne un procédé de contrôle de vraisemblance des valeurs de mesure d'un capteur d'humidité dans un véhicule à moteur et un dispositif pour la mise en oeuvre dudit procédé.
EP19701627.2A 2018-02-08 2019-01-23 Procédé et dispositif permettant le contrôle de vraisemblance des valeurs de mesure d'un capteur d'humidité Withdrawn EP3749938A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018201946.0A DE102018201946A1 (de) 2018-02-08 2018-02-08 Verfahren und Vorrichtung zur Plausibilisierung der Messwerte eines Feuchtesensors
PCT/EP2019/051625 WO2019154623A1 (fr) 2018-02-08 2019-01-23 Procédé et dispositif permettant le contrôle de vraisemblance des valeurs de mesure d'un capteur d'humidité

Publications (1)

Publication Number Publication Date
EP3749938A1 true EP3749938A1 (fr) 2020-12-16

Family

ID=65228548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19701627.2A Withdrawn EP3749938A1 (fr) 2018-02-08 2019-01-23 Procédé et dispositif permettant le contrôle de vraisemblance des valeurs de mesure d'un capteur d'humidité

Country Status (3)

Country Link
EP (1) EP3749938A1 (fr)
DE (1) DE102018201946A1 (fr)
WO (1) WO2019154623A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113237666B (zh) * 2021-05-10 2023-01-06 潍柴动力股份有限公司 一种环境温度可信性确定方法、装置、工程机械及介质

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI82554C (fi) * 1988-11-02 1991-03-11 Vaisala Oy Kalibreringsfoerfarande foer maetning av den relativa halten av gas eller aonga.
DE10049685A1 (de) 2000-10-07 2002-04-11 Volkswagen Ag Verfahren und Vorrichtung zur Eigendiagnose eines NOX-Sensors
DE10254485B4 (de) 2002-11-22 2008-08-07 Audi Ag Kraftfahrzeug
DE102007005498A1 (de) 2007-01-30 2008-07-31 Behr Gmbh & Co. Kg Klimaanlage, insbesondere Kraftfahrzeug-Klimaanlage, und Verfahren zum Regeln einer solchen
JP5230508B2 (ja) * 2009-03-31 2013-07-10 アズビル株式会社 湿度センサの劣化診断方法
JP5235756B2 (ja) * 2009-03-31 2013-07-10 アズビル株式会社 湿度センサの劣化診断方法
DE102010030338A1 (de) * 2010-06-22 2011-12-22 Robert Bosch Gmbh Sensormodul und Betriebsverfahren hierfür
EP3244199B1 (fr) * 2015-01-08 2019-12-18 Hitachi Automotive Systems, Ltd. Dispositif de mesure d'humidité
EP3379218B1 (fr) * 2017-03-21 2020-07-15 MEAS France Procédé permettant de fournir un diagnostic sur un capteur d'humidité et de température combiné

Also Published As

Publication number Publication date
DE102018201946A1 (de) 2019-08-08
WO2019154623A1 (fr) 2019-08-15

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