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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Another advantage in terms of an mediumstempeatur flowmeter is that not only predicted to ermitttlung that at least one of the at least three sensor elements mediumstemperautr a sensor drift, but if possible, about which the at least three sensor elements is affected. When using temperature sensors, in particular contact thermometers, in industrial processes they have to fit for industrial use ermittlumg to the requirements of the process.
Zitierte Patentliteratur Cited patent literature. Vorteilhaft mediymstemperatur der Massedurchfluss bzw. T kor be determined 1. Im Folgenden wird der Einfachheit halber das erste Sensorelement, medkumstemperatur. To this end, the two sensor elements in each case only a single and two sensor elements of the same temperature-dependent resistance, so that for a common ground connection a built-up from two sensor elements the sensor requires a total of only three terminals.
A method according to claim 1, characterized in that for the determination of the calculation model from the temperature sensor and one or more sensors faster compared under jump or stage loading temperature-time curves in the run of the service operation can be determined.
Es ist von Vorteil, wenn ermittluny eines der zumindest drei Sensorelemente eine erste Ausgestaltung bezogen auf die Geometrie, Aufbau und Material, aufweist, und zumindest ein zweites der zumindest drei Sensorelemente eine zweite von der ersten verschiedene Ausgestaltung aufweist.
Equipped with the inventive calculation model sensor can be constructed completely differently than the comparison sensor behaves leveler technical perspective after processing the raw data by the calculation model static and dynamic as well as the comparison sensor. The invention has the object of providing a cost-effective method for temperature measurement of hot specify flowing gases, which corrects the static and dynamic characteristics of a probe by using a calculation model that the static and dynamic characteristics of a comparative sensor are simulated.
Temperature measurement at a semiconductor body, with an integrated sensor, generates a signal for the temperature at a given position to pass through an amplifier and a deep pass filter to give a real time signal.
The exterior heat resistance on the other hand by the formation of deposits, removal of material or conversion material corrosion on the influence on the medium contacting surfaces of the respective sensor element.
A this configuration corresponding flowmeter then has therefore in addition to the additional functionality of being able to make a diagnosis, or a statement about the state be able to make at least one sensor element, a flow direction detection. This is all the greater, the greater the difference between ambient and medium temperature.
H und der mittels eines zweiten Sensorelementes SE2 erfassten Mediumstemperatur? This time we really needed a large floe because we wanted to deploy four buoys in a certain distance of each other: The invention further relates to a device for carrying out the method.
S2 and S3 on the other hand remain unheated and are used to measure the medium temperature T M. The heated temperature sensor is in turn in addition thereto, constructed from several parallel-connected thermocouples for measuring the temperature difference between the heater and the flowing medium from an electrical heating element and.
The invention is suitable for use in resistive or thermoelectric circuits for low-error signal conversion. Since the two sensor elements SE1 and SE2 are made the same, and in particular identical temperature-dependent resistance elements R1 and R2, preferably based on platinum, the thermal masses, and in particular its thermal time constants corresponding to the same or identical.
This rising and decaying be considered. Results shown were incorporated into the preparation of the estimation algorithm described in the following. Wichtig ist es, dass die Temperatur an beiden Anschlussstellen gleich und konstant ist. Reference Number Reference Number. To minimize the display’s dependence on the Reynolds’ number, also where.
DEA1 – Thermal flow meter with diagnostic function – Google Patents
Thank you very much for your vote! By this measure, the local surrounding the respective sensor element airfoil is selectively changed as compared to a non-arranged behind a bluff body sensor element, or in comparison to a bluff body disposed behind a different geometry sensor element. The device comprises two substantially identical, that is identical as possible sensor elements.
Sensor array for accurate and reliable process temperature measurement, includes sensors with impedance-temperature coefficients differing in magnitude and sign. Advantageous embodiments of the invention are subject of the subclaims.
DE19948135B4 – Method and apparatus for measuring the mass flow of a medium – Google Patents
From a comparison of the various decision coefficients in turn can determine, if possible, for which the three sensor elements S1, S2, S3, the thermal resistance has changed. Therefore, in the numerical calculations, the temperature dependence of the material data must be taken into account. The detection of the actual value x? The size of the thermal resistances depends on constructive length, cross-sectional area and material parameters thermal conductivity from. Dabei wird in der beschriebenen Art und Weise mittels der digitalen Regeleinrichtung Here, in the described manner by means of the digital controller 2 2 bzw.
Dies ist insbesondere bei hohen Durchflussraten problematisch. In the following, for simplicity, the first sensor element, z.
By means of a thermal flow meter can not be readily between ermittling forward and a backward flow differ. The vortex principle allows a flow measurement without moving [ The measurement of this sensor served as mediumstemperatuf basis for the creation of the estimation algorithm. The following diagrams are taken from DIN 43 and show the load limit for the different [ US USA1 en For measuring the mass stream, the temperature difference between the two temperature sensors is evaluated, while the heating power is kept constant.
The first order and the output equation state equation thus be: According to the criterion of Kalman, the observability must have full rank: The underlying measurement principles are known accordingly from a variety of publications. In order to maintain a specific temperature difference, a time-constant amount of heat is then required, for example.
This is not a good example for the translation above. The local flow profiles are indicated by arrows. To the left and the right of the obstruction point. Die Richtungserkennung The direction detection 3a 3a wird z. In a particularly preferred embodiment, the electronic unit is adapted to determine the flow direction of the flowable medium. The wrong words are ermittlunng.
The internal heat resistance depends inter alia on individual components within the sensor element, eg within the sleeves off.