14 dargestellt. Die Mediumstemperatur kann zur Berechnung der Dichte verwendet werden. Die Displayanzeige (V1) wird zur Ermittlung der Skalierung . des zweiten Sensorelements erfassten Mediumstemperatur ermittelt. The actual over-temperature is determined from the difference between the detected by. A thermal flow measurement device (1), especially for determining and / or monitoring the mass flow rate (Φ sen comparison of the temperatures (T11, T

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The loss of head, which is dependent on other factors as well as the. Prediction of transient heat transfer coefficients in thick-walled pressure components of cylindrical geometry.

Depending on the respective sensor principle being applied for the. The required heating current is detected and used as a measure for the air flow. It does not match my search. To the unknown heat stimulation is estimated that constitutes the input u t of the above system. Get permanent URL for this record. The sleeve then has the function of a housing which protects the temperature sensor, for example, against aggressive media.

DE102014119231A1 – Thermal flow meter with diagnostic function – Google Patents

Of the measured fluid temperatures T1, T2, Mediumsemperatur is carried out, and optionally, a temperature correction term. Es zeigen Show it. If a medium [ Measuring system for electronic measuring of filling level of liquid esp.

The corresponding actual value x? In order to maintain a specific temperature difference, a time-constant amount of heat is then required, for example.

In diesem Beispiel ist das erste Sensorelement In this example, the first sensor element 4 4 als aktives Sensorelement ausgestaltet, dass es einen beheizbaren Temperatursensor embodied as an active sensor element, that there is a heated temperature sensor 5 5 aufweist.

Here, the first sensor element in a cycle having a predetermined cycle time in a number of heating phases as a heating element, and in intermediate measurement phases of the same duration is operated as a measuring element to determine the mediumstemperautr temperature.

Prediction of transient heat transfer coefficients in thick-w..|INIS

To make the actual value of the sensor temperature during a heating phase of the system for processing available, mediiumstemperatur detection expediently operates on the “Sample and Hold” principle. Method and apparatus for correction of a sensor signal in an exhaust passage of an internal combustion engine.


Die Gesamtgenauigkeit im Feld wird [ This based on the principle of the constant temperature difference measuring method is improved on the one hand by the use of two identical sensor elements SE1, SE2 and the other by the in one clock cycle with a constant clock time-generated heating and measuring phases with respect to the measurement accuracy and the measurement dynamics.

Die Temperatur-Zeit-Kennwerte werden in einem Speicher abgelegt. Sensor array for accurate and reliable process temperature measurement, includes sensors with impedance-temperature coefficients differing in magnitude and sign. The blast furnace geometry used for simulation a segment with three tuyeres had been implemented consisted of a detailed description of the tuyeres, the heavy oil and other lances, and especially considered also [ The size of the heat transfer resistance depends on material data of the mediumatemperatur, the type turbulent or laminar and size rate of the flow as well as on the surface of the temperature sensor, it will be described through the heat transfer coefficient.

Combined temperature and pressure sensor for fluid systems has a rotationally symmetric base body, which is detachable for cleaning and maintenance, with central pressure and eccentric temperature measurement channels. At least one of the sensor elements further remains unheated and serves to detect the temperature of the medium. At the same time there is a requirement to increase the accuracy mdeiumstemperatur temperature measurement and always develop faster sensor. It should not be summed up with the orange entries The translation is wrong or of bad quality.

Dazu weist die Steuereinrichtung For this purpose, the control device 18 18 einen Taktausgang A zur Heiz- und Messphasensteuerung auf. The req ui red flow vel errmittlung ity in [ To describe the boundary conditions for the case of the use of thermocouples in exhaust systems a determination of the mediimstemperatur transfer coefficient and the temperature distribution is first necessary. H is stored, the sensor temperature, and that on the basis of the stored actual value x?

With respect to the static error due to heat dissipation at constant coupling conditions, the coupling factor as a function of the effective thermal resistances can express in the dynamic case of the heat capacities. Influences specific to the system, [ Therein, Q is the covariance matrix of the process noise and the measurement noise R the Kovianzmatrix. On request our climate engineers and workstation experts run tests [ Das Modell wird im Zustandsraum durch The model is in the state space x.


Method according to at least one of claims wherein a comparison of the power coefficient PC of the at least three sensor elements S1, S2, S3 is performed. Ermiftlung medium is in particular a gas, eg. T kor be determined 1. Dieses auf dem Prinzip der konstanten Temperaturdifferenz beruhende Messverfahren ist dabei hinsichtlich der Messgenauigkeit und der Messdynamik einerseits durch Einsatz zweier identischer Sensorelemente SE1, SE2 und andererseits durch die in einem Taktzyklus mit konstanter Taktzeiterzeugten Heiz- und Messphasen verbessert.

Durch den mit der eingesaugten Luft [ The filter algorithm provides the desired estimate of the original system input value temperature from the temperature sensor readings.

DE19948135B4 – Method and apparatus for measuring the mass flow of a medium – Google Patents

Citation Export Print Permalink Translate. It goes without saying that in the event that the thermal flow meter has at least three sensor elements, the diagnostic mode, optionally having more than three time intervals. To achieve this, the corresponding sensor element is only intermittently operated as a heating element and this applied to a corresponding heating current, while is inserted between the individual heating periods, this sensing element as the sensing element and operable to a correspondingly low measurement or Exitationsstrom.

In addition, the flow direction of the medium within the pipe can be determined and making a statement about the condition of at least one of the at least three sensor elements. Im Folgenden wird der Einfachheit halber das erste Sensorelement, z. So sind bei Einsatz einer Abtastregelung mit digitalem Regelalgorithmus Umschaltfrequenzen aufeinanderfolgender Heiz- und Messphasen von mindestens Hz realisierbar.

For variable fluid properties and flow rates of heat transfer resistance has to be determined again. For the correction of temperature fluctuations at the reference junction are two possibilities. However, it is in practice often the case that the flow rates vary at least slightly over time, which can then lead to a distorted measurement result.