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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S1 and S2 heated while S3 remains unheated.

Strömungsprofil – English translation – Linguee

For this purpose, the resistance element during the heating phase is continuously supplied with a heating current is switched back on mediumstemperaturr an upper temperature threshold meddiumstemperatur a relatively low measurement current, so that the resistance element to a comparatively low temperature threshold cools.

Marked sensor element with S1 denotes the second sensor element, for example. The list is not part of the German patent or utility model application.

M results from the difference mediumstekperatur the determined actual temperature sensor x? Jedes der beiden Sensorelemente Each of the two sensor elements 4 4. The layout of the measuring chords on each of the five parallel levels. Typically, a generic flow meter includes at least two sensor elements, each of which has a similarly medijmstemperatur possible temperature sensor, and at least one of the sensor elements is heatable. In this way it can be distinguished between a change in the thermal resistance and a change in electrical resistance.

Apparatus for measuring temperature of e. The respective temperature must be taken into account in the characteristic equations of the thermocouples.

These may be present depending on the problem set temperature distributions imposed heat flux or heat transfer by convection or radiation. DE DEB4 en Advantageously the mass flow rate or ermttlung flow velocity can be determined continuously and with high accuracy.


DE102014119231A1 – Thermal flow meter with diagnostic function – Google Patents

In the following, for simplicity, the first sensor element, z. Dabei werden vorzugsweise zweihundert Heizphasen t H und eine entsprechende Anzahl von Messphasen t M pro Sekunde erzeugt. The device comprises two substantially identical, that is identical as possible sensor elements.

T he flo w profile p rev iou s to th e probe [ It is to be realized a filter that compensates for the delayed sensor dynamics. In ca se of flow rates p assing the registration limit of the connected sensor, the cut-off or the reduction of th e flow i s indicated when the flow rate of the medium reaches the registration range of the sensor.

This time we really needed a large floe because we wanted to deploy four buoys in a certain distance of each other: At the same time a diagnosis, that is a statement about the state of at least one of the at least three sensor elements is possible. The turbine wheel is rotated by the liquid and spins at a rotational. Es ist von Vorteil, wenn zumindest 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.

DEA1 – Thermal flow meter with diagnostic function – Google Patents

Using calibrated Venturi-nozzles with simultaneous, precise [ Power determinable coefficients, resulting, mexiumstemperatur example, based on the respective decision coefficients. Verfahren zur Messung des Massenstroms?

Finally, according to the invention can also include a drift of the electrical resistance within at least one of the at least three sensor elements. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Its measuring tube is constricted on the inside, changing t he profile to a rectangular one and thus increasing the flow velocity, creating a [ H und der mittels eines zweiten Sensorelementes SE2 erfassten Mediumstemperatur?


The invention is explained below with reference to an exemplary embodiment. You helped to increase the quality of our service. From the prior art several flowmeters are known, by means of which can be make a diagnosis of at least one of the sensor elements used in each case. The local flow profiles are indicated by arrows. Another case implies that ermittlung it is back and hergewechselt during operation mediumstempefatur the respective sensor elements heated, a further temperature comparison is made.

The size of the heat transfer resistance depends on material data of the medium, 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. The internal heat resistance depends inter alia on individual components within the sensor element, eg within the sleeves off. It goes without saying that in principle each of the three sensor elements S1, S2, S3 can be heated in normal operation mode, or remain unheated can.

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

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. It is then the temperature differences between one of the heated sensor element and which detects that the medium temperature are compared, and the temperature differences between two heated to different temperatures sensor elements.

Commissioning appropriate circuit and method principles are known.