EP2242565B1 - Mischer sowie Vorrichtung und Verfahren zur Überwachung oder Steuerung dieses Mischers - Google Patents

Mischer sowie Vorrichtung und Verfahren zur Überwachung oder Steuerung dieses Mischers Download PDF

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Publication number
EP2242565B1
EP2242565B1 EP09708028A EP09708028A EP2242565B1 EP 2242565 B1 EP2242565 B1 EP 2242565B1 EP 09708028 A EP09708028 A EP 09708028A EP 09708028 A EP09708028 A EP 09708028A EP 2242565 B1 EP2242565 B1 EP 2242565B1
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Prior art keywords
particle
instrumented
mixture
mixer
products
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EP09708028A
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English (en)
French (fr)
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EP2242565A1 (de
Inventor
Jean-François PINTON
Pascal Metz
Yoann Gasteuil
Woodrow Lee Shew
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Centre National de la Recherche Scientifique CNRS
Ecole Normale Superieure de Lyon
Ecole Normale Superieure de Paris
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Centre National de la Recherche Scientifique CNRS
Ecole Normale Superieure de Lyon
Ecole Normale Superieure de Paris
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/213—Measuring of the properties of the mixtures, e.g. temperature, density or colour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/214—Measuring characterised by the means for measuring
    • B01F35/2142—Measuring characterised by the means for measuring using wireless sensors introduced in the mixture, e.g. transponders or RFID tags, for measuring the parameters of the mixture or components to be mixed

Definitions

  • the monitoring or control device is a device which makes it possible to verify that the mixing is carried out according to a pre-established plan and / or to control different equipment of the mixer such as the stirrer so that the mixing takes place in accordance with this preset plan.
  • the device makes it possible to stop the mixer when the mixture is homogeneous.
  • the measurable characteristic used may also be representative of the progress of a process related to the mixture such as a chemical reaction. In the latter case, the device makes it possible to monitor the smooth running of the process and to act on the mixer if the process does not proceed as expected.
  • the invention aims to remedy these problems by providing a mixer in which the monitoring or control of the mixture is more effective.
  • the instrumented particles are free to move in the mixture, they are capable of measuring the characteristic at many points in this mixture and even under the visible surface of the mixture.
  • the number of instrumented particles is less than the number of points where a measurement can be made. This makes it possible to limit the number of sensors used compared to a situation where one would like to obtain the same measurements by using sensors fixed on the walls of the container.
  • instrumented particles move in the mixture under the action of turbulent flows created by the agitator. It is therefore not necessary to provide specific means of propulsion for these particles.
  • the mixer equipped with the monitoring or control device above thus simply allows to monitor and control more efficiently the progress of mixing.
  • the subject of the invention is also a device for monitoring or controlling a mixer that can be used in the mixer above.
  • Embodiments of this monitoring or control device include the features of claims 3 to 7.
  • the subject of the invention is also a process for monitoring or controlling a mixer of fluid or granular products which are distinguishable from each other, before mixing, by at least one measurable physical quantity, according to claim 9 and use of an instrumented particle according to claim 8.
  • the figure 1 represents a mixer 2.
  • This mixer 2 comprises a container 4 containing a mixture 5 of different products.
  • the products to be mixed are poured into the container 4 by a controllable doser 6.
  • the products introduced into the container 4 are distinguished from each other, before mixing, by at least one measurable physical quantity.
  • the mixture is inhomogeneous.
  • the purpose of the mixer is to homogenize the mixture with respect to the spatial distribution of the values of a characteristic of this locally measurable mixture. More specifically, here it is considered that a mixture is inhomogeneous if there exists in the mixture at least a first and a second product pockets in which the measured characteristic has, respectively, a first and a second different values, the difference between these first and second values being greater than a predetermined threshold.
  • the minimum size of the pockets taken into account and the predetermined threshold is, for example, set beforehand by the user according to the products to be mixed.
  • the mixture is considered homogeneous if it is not inhomogeneous.
  • the characteristic of the locally measurable mixture is the physical quantity which makes it possible, before mixing, to distinguish the mixed products.
  • the embodiment of the figure 1 is described in the particular case where the mixed products are respectively yellow and blue liquid paints.
  • the purpose of the mixer is to obtain a homogeneous mixture of uniformly green color.
  • the dispenser 6 is able to introduce into the container 4 dosed amounts of each of the products to be mixed.
  • the metering device 6 is formed of pipes each equipped with a controllable metering pump. To simplify the figure 1 only a pipe 8 and a metering pump 10 have been shown. Each duct opens into the interior of the container 4.
  • the dispenser 6 makes it possible to introduce dosed volumes of paints of different colors into the receptacle 4.
  • the mixer 2 comprises a controllable stirrer 14 for stirring the products received in the container 4.
  • the stirrer 14 comprises a propeller 16 driven in rotation by a motor 18.
  • the position of the stirrer 14 with respect to the container 4 is adjustable by means of a mechanism 20 for moving the stirrer 14 relative to the walls of the container 4.
  • the mechanism 20 makes it possible to incline the axis of rotation of the propeller 16 in different directions.
  • Each instrumented particle 24 and capable of measuring the physical quantity that makes it possible to differentiate the mixed products in the container 4.
  • these particles 24 are each equipped with a color sensor making it possible to differentiate the two paints of different colors.
  • These particles 24 are also equipped with a transmitter making it possible to send, in real time and simultaneously, the measurements made by their respective sensors to the antennas 26 to 28. The particles 24 are described in more detail with respect to the figure 2 .
  • the antennas 26 to 28 are arranged outside the container 4 so as to receive the measurements made by the particles 24.
  • the three antennas 26 to 28 are arranged relative to each other so as to allow a localization of each particle instrumented by triangulation.
  • the processing unit 30 comprises a receiver 32 connected to each of the antennas 26 to 28 so as to receive the measurements sent by the particles 24.
  • the figure 2 represents in greater detail an instrumented particle 24. Here, for simplicity, it is assumed that all the instrumented particles 24 are identical.
  • the particle 24 also comprises a microcontroller 52 adapted to control the different elements of the particle 24.
  • the particle 24 comprises a battery 54 for feeding all the equipment of the particle.
  • a second sensor 56 is also shown in dotted lines.
  • This second sensor 56 may be identical to the sensor 44, that is to say it may be able to measure the same physical quantity as the sensor 44 or, on the contrary, be able to measure another physical quantity than that measured by the sensor 44.
  • the sensors 44 and 56 measure the same physical quantity, they are arranged at different locations around the periphery of the particle 24 and preferably diametrically opposite.
  • the sensor 56 as the sensor 44 is connected to the converter 46.
  • the particle 24 comprises only the sensor 44.
  • the sensor 44 is a color sensor capable of distinguishing the two paints mixed by their respective colors.
  • the particle 24 also comprises a protective shell 58 adapted to protect the various electronic equipment it contains from the external environment inside which it is intended to be incorporated.
  • the sphere 58 has a diameter D.
  • the diameter D is small enough that the cumulative volume of all the particles 24 remains small compared to the volume of the mixture. For example, the cumulative volume of the particles 24 is less than 10% of the volume of the mixture. Thus, the presence of the particles does not interfere with the mixing.
  • the diameter D is less than 2 cm and preferably less than 1 cm.
  • the weight of the particle 24 is sufficient so that it can pass through the different product pockets during mixing.
  • the diameter D of the particle 24 is chosen so that the density of this particle is substantially equal to the density of the mixture 5.
  • substantially equal is meant the fact that the density of the particle 24 is equal to the density from mixture 5 to plus or minus 10%.
  • the density of the particle 24 is equal to the volume of this particle divided by its weight.
  • the density of the mixture is equal to the volume of this mixture divided by its weight. If the mixture is made at constant weight and volume, the volume of the mixture can be determined a priori by the ratio of the volume of the products to be mixed to the weight of the products to be mixed.
  • the particles 24 uniformly sweep the entire volume of the mixture 5, which improves the reliability of the monitoring and control device of the mixer 2.
  • the particles 24 are incorporated in the mixture 5.
  • the particles 24 are introduced at the same time as the products to be mixed in the container 4.
  • the stirrer 14 is controlled to stir the products to be mixed inside the container 4.
  • the motor 18 rotates the propeller 16 which itself mixes the various products present in the container 4.
  • This stirring of the products also causes the particles 24 to move inside the container 4 under the action of the turbulent flows created in the mixture 5 by the propeller 16.
  • the particles 24 are free to move within the mixture 5 and are not retained by any element to the walls of the container 4 or the agitator 14.
  • each particle 24 is independent from other particles. Under these conditions, the particles 24 uniformly sweep the entire volume of the mixture 5.
  • the sensor 44 of each particle 24 performs an instantaneous measurement g i (t) of the physical quantity that makes it possible to differentiate the mixed products, that is to say here , their color.
  • the index i identifies the particle 24 that made the measurement.
  • each measurement g i (t) is instantaneously sent to the receiver 32 via a wireless link established between the emitter 50 of this particle and the antennas 26 to 28.
  • the unit 30 executes a phase 66 for monitoring and controlling the mixer 2.
  • the receiver 32 receives the measurements g i (t) sent by each of the particles 24.
  • Each particle 24 sends its measurements on a frequency of its own so as not to interfere emissions of other particles 24 present in the same mixture.
  • each information frame emitted by a particle 24 has an identifier of this particle making it possible to identify this particle from all the particles present in the mixture 5.
  • the module 36 determines, for example, whether the mixture is sufficiently homogeneous to be able to stop the stirrer 14. For example, beginning of step 70, during an operation 72, an average value g (t) different instantaneous measurements g i (t) sent by each particle 24 is calculated. Typically, this average g (t) is a running average over a predetermined time interval ⁇ t. Then, during an operation 74, the module 36 checks whether each instantaneous measurement g i (t) sent by each particle 24 during the interval ⁇ t is equal to the average g (t) more or less ⁇ g.
  • ⁇ g is a margin of tolerance on the homogeneity of the mixture. ⁇ g is predetermined by the user. For example, here ⁇ g is chosen less than 10% of the average g (t) and, preferably, less than 5% of the average g (t) .
  • the module 38 controls, during a step 76, In this case, it is considered that the mixture 5 has become sufficiently homogeneous and it is therefore no longer necessary to continue stirring it.
  • the locator 34 determines the position, in an integral reference frame of the container 4, of each particle 24.
  • the position of each particle 24 is determined by triangulation from moments of reception of the measurement g i (t) by the antennas 26 to 28 or from the power of the signals received by each of the antennas 26 to 28.
  • the unit 38 controls the different equipment of the mixer 2 according to the g i (t) measurements sent by the particles 24 and the location of these particles 24 obtained in step 78. For example, from each measurement g i (t) and the location of the particle having sent this measurement, the module 38 determines where the residual pockets of yellow or blue color in the container 4. Then, the module 38 controls the mechanism 20 to preferentially stir areas of the mixture 5 where are these residual pockets of yellow or blue color . During step 80, the module 38 can also control the motor 18 to accelerate or otherwise slow down the stirring of the products according to the measurements g i (t).
  • step 80 if the average color predicted for mixing from the measurements g i (t) sent by each of the particles 24 does not correspond to a target color set by the user, then the module 38 also controls the metering device 6 for introducing products during mixing. For example, if the uniform color predicted for blend 5 is too close to yellow, the module 38 controls the addition of blue paint to this blend.
  • the figure 4 represents an example of evolution over time of the measurements g i (t) carried out by four particles 24.
  • the measurements of the first, second, third and fourth particles 24 are identified by, respectively, a cross, a circle, a square and a triangle.
  • the particles 24 are either in pockets of yellow paint or in pockets of blue paint.
  • the standard deviation of the distribution of these measures around the mean g (t) is important.
  • this standard deviation gradually decreases. The mixture thus becomes more and more homogeneous and the measurements g i (t) are close to the average g (t) .
  • each measurement g i (t) made by any of the particles 24 is included in a band of width 2 ⁇ g centered around the average g (t) .
  • Agitator 14 is thus stopped at time t 1 after the time interval ⁇ t has elapsed.
  • the senor 44 may be replaced by any sensor of a locally measurable mixture characteristic.
  • This measured characteristic may be different from the physical quantity used to differentiate, before mixing, the mixed products.
  • Such a choice of the characteristic may be appropriate if the inhomogeneities of the mixture that one seeks to detect appear following reactions that occur between the mixed products, for example.
  • the sensor may also be selected to measure a representative characteristic of the progress of a chemical or other reaction that occurs as the mixture.
  • the senor may be a sensor of temperature, pressure, pH, polarography, resistivity, capacitance, spectrophotometry, opacity, turbidity, refractometry or viscosity.
  • the sensor may also be a biochip, a biosensor or a sensor known as "lab-on-chip”.
  • the mixer that has been described and its monitoring and control device can be adapted to many applications.
  • the mixed products it is not necessary for the mixed products to be miscible liquid products as in the case of paints. It can also be immiscible products.
  • the mixed products may be in liquid, gaseous or granular form. In the case of gases, it will be noted that it is possible to fill the interior space of the particle with a possibly lighter gas than the gases in which the particle is incorporated.
  • the mixer 2 may be suitable for monitoring and controlling a mixer of granular products such as concrete.
  • granular mixers are sand and gravel.
  • the sand is distinguished, before mixing, gravel by the weight of its grains which is more than ten times lower than that of a gravel. This difference in weight between a grain of sand and a gravel can be measured using an accelerometer. Indeed, since the gravel is heavier than sand grains, their inertia is greater. Therefore, when a gravel strikes an instrumented particle the amplitude of the deceleration or acceleration experienced by the instrumented particle is much greater than if the same particle had been struck in the same condition by a grain of sand.
  • the sensor 44 is replaced by an accelerometer.
  • the figure 5 schematically illustrates the evolution over time of the amplitude a (t) of the acceleration measured by this instrumented particle.
  • shocks of sand grains on the shell of the particle produce accelerations and decelerations of small amplitudes.
  • this particle passes through a zone P 2 of the mixture only filled with gravel, the amplitudes of the accelerations or decelerations due to the shocks of the particle on the gravel are much greater.
  • this particle makes it possible to discriminate a pocket of sand from a pocket of gravel.
  • the module 36 or 38 calculates, over a predetermined time interval ⁇ t, the ratio between the standard deviation of the measurements a (t) on the average of these measurements a (t). In the area P 1 , this ratio is small. Conversely, in the P 2 zone, this ratio is much greater. Finally, in a zone P 3 , where sand and gravel are uniformly mixed, this ratio has an intermediate value between the two previous ones. Indeed, in zone P 3 , the variations of the amplitude a (t) around the average are generally small except from time to time when the particle meets a gravel. This ratio can therefore be used to monitor the state of mixing of sand and gravel and, for example, stop the mixer when the ratio has reached a predetermined target value.
  • Module 38 may be omitted.
  • the instantaneous measurements g i (t) of the instrumented particles are used to predict the evolution of the mean g (t) .
  • the evolution predicted for the average g (t) is represented by a line in broken lines ⁇ (t).
  • the predicted evolution ⁇ (t) is, for example, used by the module 36 to ensure that the mixture is well under control and that it will not exceed a predetermined threshold S 1 .
  • the module 36 triggers an alarm.
  • the device is only used to monitor the mixture without controlling the mixer to intervene on the course of mixing.
  • the average g (t) can be predetermined experimentally by measurements on a homogeneous mixture.
  • the average g (t) can also be established using only the measurements sent at time t.
  • the density of the instrumented particles is chosen substantially equal to the density of the homogeneous mixture.
  • the instrumented particles incorporated in the mixture do not all have the same density.
  • particles have a density substantially equal to the density of the first product and other particles have a density substantially equal to the density of the second product.
  • the particles When the turbulence created by the stirrer 14 is strong enough to make negligible the effect of gravity on the path of the particles in the mixture, it is not necessary that the particles have substantially the same density as the mixed products or the same density as the mixture obtained. It is considered that the force exerted by the gravity on a particle is negligible compared to the force exerted by the turbulences on this particle, if there is at least a ratio ten between these two forces. For example, the density of the particles in this case is between 1/10 and ten times the density of the mixture.
  • the stirrer 14 can be replaced by a mechanical stirrer consisting of rotating the container 4 as, for example, in the case of a concrete mixer. Agitator 14 can also create the forces that stir the products to be mixed by other means. For example, brewing forces can be electromagnetic forces.
  • the number of instrumented particles incorporated into the mixture can be reduced to one. However, preferably this number is greater than four or ten.
  • the measurements transmitted to the receiver 32 may be differential measurements, that is to say corresponding to the difference between the measurements made by each of the sensors of the particle.
  • a differential measurement is particularly interesting if the sensors are arranged on diametrically opposite sides of the instrumented particle.
  • Part of the treatments carried out here by the processing unit 30 can be carried out inside each particle 24.
  • the module 36 can be incorporated inside the particles 24.
  • the particles send no plus measurements made but already pre-processed information such as an alarm.
  • the communication between the particles 24 and the processing unit 30 can then be bidirectional.
  • the wave used to locate each particle is not necessarily the same as that used to transmit the measurements in real time.
  • one of the three antennas may be omitted.
  • the location of the particles in the mixture can also be achieved by means other than triangulation.
  • the particles can be located using one or more cameras and image processing.
  • the transmission of the measurements towards the receiver 32 by the particles implements frequency multiplexing.
  • this frequency multiplexing may be replaced by a time division multiplexing.
  • Other technologies such as code division multiple access (CDMA) or French code division multiple access (CDMA) can also be used.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Accessories For Mixers (AREA)

Claims (9)

  1. Mischer, umfassend:
    - zu mischende flüssige oder granulatartige Produkte, um ein Gemisch zu bilden,
    - einen Behälter (4), in dem die zu mischenden flüssigen oder granulatartigen Produkte aufgenommen werden, um das Gemisch zu bilden,
    - ein Rührwerk (14), das die in dem Behälter vorhandenen Produkte durchrühren kann, und
    - eine Vorrichtung zur Überwachung oder Steuerung des Mischers in Abhängigkeit von mindestens einem messbaren Merkmal des Gemisches,
    - wobei diese Vorrichtung Folgendes umfasst:
    • mindestens ein instrumentiertes Partikel (24), das dazu bestimmt ist, in das Gemisch eingegliedert zu werden, wobei jedes instrumentierte Partikel:
    a. geeignet ist, sich frei autonom im Inneren des Gemisches unter der Wirkung der vom Rührwerk durchgerührten Produkte zu bewegen,
    b. mit mindestens einem Fühler (44) ausgestattet ist, der geeignet ist, das Merkmal zu messen,
    • eine Bearbeitungseinheit (3
    Figure imgb0001
    ), die geeignet ist, den Mischer in Abhängigkeit von den Messungen des Merkmals, die von jedem instrumentierten Partikel durchgeführt werden, zu überwachen oder zu steuern,
    dadurch gekennzeichnet, dass:
    - sich die zu mischenden Produkte vor dem Mischen durch mindestens eine messbare physikalische Größe unterscheiden,
    - das vom Fühler jedes instrumentierten Partikels gemessene Merkmal für die physikalische Größe repräsentativ ist, die die gemischten Produkte vor dem Mischen voneinander unterscheidet, und
    - die Bearbeitungseinheit (3
    Figure imgb0002
    ) geeignet ist, das Ende des Mischens anzuzeigen, wenn die momentanen Messungen des Merkmals während eines vorbestimmten Zeitintervalls dem durchschnittlichen Wert der durchgeführten Messungen auf + oder - Δg genau gleich sind, wobei Δg eine vorbestimmte Schwelle ist.
  2. Mischer nach Anspruch 1, bei dem das Rührwerk (14) ein mechanisches Rührwerk ist, das mit dem Behälter verbunden ist und die in dem Behälter aufgenommenen Produkte mechanisch bewegen kann, um sie miteinander durchzurühren.
  3. Vorrichtung zur Überwachung oder Steuerung eines Mischers nach Anspruch 1 oder 2, wobei diese Vorrichtung Folgendes umfasst:
    - mindestens ein instrumentiertes Partikel (24), wobei jedes instrumentierte Partikel:
    a. geeignet ist, sich frei autonom im Inneren des Gemisches unter der Wirkung der von einem Rührwerk durchgerührten Produkte zu bewegen, und
    b. mit mindestens einem Fühler (44) ausgestattet ist, der mindestens ein Merkmal des Gemisches messen kann,
    - eine Bearbeitungseinheit, die geeignet ist, den Mischer in Abhängigkeit von den Messungen des Merkmals, die von jedem instrumentierten Partikel durchgeführt werden zu überwachen oder zu steuern,
    dadurch gekennzeichnet, dass:
    - das vom Fühler jedes instrumentierten Partikels gemessene Merkmal für die physikalische Größe repräsentativ ist, die die gemischten Produkte vor dem Mischen voneinander unterscheidet, und
    - die Bearbeitungseinheit (3
    Figure imgb0003
    ) geeignet ist, das Ende des Mischens anzuzeigen, wenn die momentanen Messungen des Merkmals während eines vorbestimmten Zeitintervalls dem durchschnittlichen Wert der durchgeführten Messungen auf + oder - Δg genau gleich sind, wobei Δg eine vorbestimmte Schwelle ist.
  4. Vorrichtung nach Anspruch 3, bei der die Dichte jedes instrumentierten Partikels (24) der Dichte des Gemisches auf mehr oder weniger 1
    Figure imgb0004
    % genau gleich ist.
  5. Vorrichtung nach einem der Ansprüche 3 bis 4, bei der die Vorrichtung mehrere instrumentierte Partikel (24) umfasst, die jeweils mit einem Fühler (44) ausgestattet sind, der das Merkmal des Gemisches messen kann.
  6. Vorrichtung nach einem der Ansprüche 3 bis 5, bei der jedes instrumentierte Partikel (24) einen Sender (5
    Figure imgb0005
    ) umfasst, um über eine drahtlose Verbindung die durchgeführten Messungen des Merkmals zu übertragen, und die Bearbeitungseinheit (3
    Figure imgb0006
    ) einen Empfänger (32) umfasst, der geeignet ist, die von jedem instrumentierten Partikel (24) übertragenen Messungen zu empfangen.
  7. Vorrichtung nach einem der Ansprüche 3 bis 6, bei der die Vorrichtung eine Lokalisiereinrichtung (34) umfasst, die geeignet ist, die Position jedes instrumentierten Partikels (24) in einem Bezugssystem, das mit einem Behälter, in dem das Mischen stattfindet, verbunden ist, festzustellen, und die Bearbeitungseinheit (3
    Figure imgb0007
    ) geeignet ist, den Mischer in Abhängigkeit von den von jedem instrumentierten Partikel durchgeführten Messungen und den festgestellten Positionen zu überwachen oder zu steuern.
  8. Verwendung eines instrumentierten Partikels:
    a. das geeignet ist, sich frei autonom im Inneren eines Gemisches unter der Wirkung der von einem Rührwerk durchgerührten Produkte zu bewegen, und
    b. das mit mindestens einem Fühler (44) ausgestattet ist, der geeignet ist, mindestens ein Merkmal des Gemisches zu messen,
    dadurch gekennzeichnet, dass das instrumentierte Partikel in einem Mischer nach Anspruch 1 oder 2 verwendet wird, um eine physikalische Größe zu messen, die die gemischten Produkte voneinander unterscheidet.
  9. Verfahren zur Überwachung oder Steuerung eines Mischers nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Verfahren Folgendes umfasst:
    - die Verschiebung (62) mindestens eines instrumentierten Partikels in dem Gemisch unter der Wirkung der von einem Rührwerk durchgerührten Produkte,
    - das Messen (64) mindestens eines messbaren Merkmals des Gemisches durch jedes instrumentierte Partikel, und
    - die Überwachung oder Steuerung (66) des Mischers in Abhängigkeit von den von jedem instrumentierten Partikel durchgeführten Messungen,
    dadurch gekennzeichnet, dass
    - das vom Fühler jedes instrumentierten Partikels gemessene Merkmal für die physikalische Größe repräsentativ ist, die die gemischten Produkte vor dem Mischen voneinander unterscheidet, und
    - das Verfahren die Anzeige des Endes des Mischens umfasst, wenn die momentanen Messungen des Merkmals während eines vorbestimmten Zeitintervalls dem durchschnittlichen Wert der durchgeführten Messungen auf + oder - Δg genau gleich sind, wobei Δg eine vorbestimmte Schwelle ist.
EP09708028A 2008-02-08 2009-01-27 Mischer sowie Vorrichtung und Verfahren zur Überwachung oder Steuerung dieses Mischers Not-in-force EP2242565B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0800682A FR2927266B1 (fr) 2008-02-08 2008-02-08 Melangeur, dispositif et procede de surveillance ou de commande de ce melangeur
PCT/EP2009/050880 WO2009098146A1 (fr) 2008-02-08 2009-01-27 Melangeur, dispositif et procede de surveillance ou de commande de ce melangeur

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EP2242565A1 EP2242565A1 (de) 2010-10-27
EP2242565B1 true EP2242565B1 (de) 2012-10-31

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US (1) US20110004344A1 (de)
EP (1) EP2242565B1 (de)
CN (1) CN101990456A (de)
ES (1) ES2398170T3 (de)
FR (1) FR2927266B1 (de)
WO (1) WO2009098146A1 (de)

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US20110004344A1 (en) 2011-01-06
FR2927266B1 (fr) 2010-12-17
FR2927266A1 (fr) 2009-08-14
CN101990456A (zh) 2011-03-23
EP2242565A1 (de) 2010-10-27
WO2009098146A1 (fr) 2009-08-13

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