System and Method for Monitoring and Controlling Conditions Within a Vessel
20250388846 ยท 2025-12-25
Assignee
Inventors
Cpc classification
G01K1/026
PHYSICS
C12M41/18
CHEMISTRY; METALLURGY
C12M23/42
CHEMISTRY; METALLURGY
International classification
C12M1/36
CHEMISTRY; METALLURGY
C12M1/02
CHEMISTRY; METALLURGY
C12M1/34
CHEMISTRY; METALLURGY
Abstract
A system and method for regression modeling and mapping an interior volume of a fluid containment vessel and interpolating data from multi-point sensor arrays within the fluid containment vessel to detect conditions across the interior volume of the fluid containment vessel. The interpolated data may then be used to control operating equipment associated with the fluid containment vessel to modify the conditions within the fluid containment vessel.
Claims
1. A system for monitoring and controlling conditions within a fluid containment vessel, comprising a computer processor configured to process signals corresponding to conditions within the fluid containment vessels, the signals being received by the processor from a plurality of sensors arrayed within the fluid containment vessel, each of the plurality of sensors having known sensor data points, the processor being configured to assign estimated sensor data points based upon the known sensor data points, each estimated sensor data point being spatially separate from each known sensor data point, and the processor being capable of interpolating signals from the plurality of sensor across a majority of volume within the fluid containment vessel between the known sensor data points and the estimated sensor data points.
2. The system according to claim 1, wherein the plurality of sensors further comprises at least two of a plurality of sensor arrays, each of the plurality of sensor arrays being configured to allow each sensor array to sense conditions within the fluid containment vessel between an inner bottom surface and an inner top surface of the fluid containment vessel, wherein each of the plurality of sensor arrays are shielded from fluid incursion by fluid within the fluid containment vessel.
3. The system according to claim 2, further comprising a three-dimensional cubic grid defined by the processor along latitude and longitude axes within the fluid containment vessel and between the known data points and the estimated data points.
4. The system according to claim 3, wherein the computer and processor are configured to conduct regression analysis of and interpolate data from the known data points and estimated data points throughout the three-dimensional grid.
5. The system of claim 3, wherein the three-dimensional grid pattern within the fluid containment vessel is formed in part by the at least two of the plurality of sensor arrays being positioned within the fluid containment vessel such that each of the plurality of sensors in the at least two of the plurality of sensor arrays are in vertical alignment between the at least two of a plurality of sensor arrays.
6. The system according to claim 8, further comprising a display in communication with the computer, the display being capable of displaying interpolated data from either or both latitude or longitude axes.
7. The system according to claim 2, wherein the at least two of a plurality of sensor arrays further comprise a first sensor array and a second sensor array, and the first sensor array is positioned proximate to a center of the fluid containment vessel and the second sensor array is positioned proximate to a side wall of the fluid containment vessel.
8. The system according to claim 2, further comprising a first housing passing into the fluid containment vessel and positioned along a central axis of the fluid containment vessel and a second housing passing into the fluid containment vessel and positioned proximate to a side wall of the fluid containment vessel, at least one of the plurality of sensor arrays being disposed in each of the first housing and second housing.
9. The system according to claim 2, wherein at least one of the plurality of sensor arrays further comprises temperature sensor arrays.
10. The system according to claim 9, wherein a temperature sensor in the temperature sensor arrays is selected from the following: thermometer, thermocouple, thermistor, or resistance temperature detector.
11. The system according to claim 2, wherein the sensors within the plurality of sensor arrays are selected from flow, density, pressure, pH, Brix, carbon dioxide, or other chemical property or physical property.
12. The system according to claim 1, further comprising a controller in communication with the computer and at least one of a plurality of valves and a plurality of pumps.
13. A method for monitoring and controlling conditions within a fluid containment vessel, comprising the steps of: a. Sensing a condition within the fluid containment vessel at a plurality of spatially separate positions within the fluid containment vessel and outputting known sensor data from each of a first sensor array and a second sensor array, each of the first sensor array and the second sensor array generating known sensor data within at least a majority of the fluid containment vessel; b. Generating estimated sensor data for spaced positions within the fluid containment vessel from the known sensor data; c. Conducting regression analysis on the known sensor data and the estimated sensor data and interpolating known sensor data and the estimated data sensor across at least a majority of the fluid containment vessel's internal volume; and d. Mapping the interpolated data to represent a distribution of interpolated data across the volume of the fluid containment vessel.
14. The method of claim 13, further comprising the step of color coding the mapped interpolated data and displaying hue, saturation, brightness color values corresponding to gradients in the values of the interpolated data from the known sensor data and the estimated sensor data.
15. The method of claim 13, wherein the step of sensing a condition within the fluid containment vessel further comprises the step of sending temperature at a plurality of spatially separate positions within the fluid containment vessel.
16. The method of claim 13, further comprising the step of defining a three-dimensional grid prior to the step of interpolating data.
17. The method of claim 16, wherein the step of interpolating data further comprises three-dimensional cubic interpolation.
18. The method of claim 17, wherein the step of interpolating data further comprises the step of tri-linear interpolation.
19. The method of claim 13, further comprising the steps of: a. Determining at least one positional coordinate of a known sensor data value and at least one positional coordinate of an estimated sensor data value for a condition with the fluid containment vessel; b. Comparing the known sensor data value and the estimated sensor data value with a predetermined value for each positional coordinate corresponding to the known sensor data value and the estimated sensor data value; c. Determining if each value of the sensed condition meets or exceeds a predetermined value; and d. If the value of the sensed condition exceeds a predetermined value range for the sensed condition, actuating at least one of a plurality of valves and a plurality of pumps associated with the fluid containment vessel for a period of time sufficient to bring the sensed condition within the predetermined value range for the sensed condition.
20. The method of claim 19, wherein the sensed condition is temperature and the actuating step further comprises circulating a thermal fluid within a thermal jacket coupled to the fluid containment vessel for a period of time to adjust the temperature to within the predetermined value.
Description
DESCRIPTION OF THE FIGURES
[0020] The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0031] The present invention is described, by way of example, with reference to containment tanks that are wine fermentation tanks. Those skilled in the art will understand that any type of containment tank, whether for fluids, liquids, particulates, solids, semi-solids, suspensions or the like, in which it is desirable to monitor and/or control conditions within the tank, such as temperature, density, pressure or the like, is expressly intended to be within the scope of the present invention.
[0032] The process of wine making is illustrated in
[0033] The system and method of the present invention has general application in monitoring and controlling conditions of fluids, solids, suspensions, particulates or the like in a containment tank. By way of example only, the present invention has application in monitoring and controlling alcohol fermentation conditions in wine making. Those of ordinary skill in the art will understand that the system and method of the present invention is not intended to be limited to application in alcohol fermentation or wine making. Rather, the system and methods of the present invention are applicable to a wide range of containment vessels 42 where monitoring or controlling of environmental conditions with a containment vessel 42 are needed or are desirable. Examples of such other applications include, without limitation, oil and gas storage tanks, pipelines, transport vehicle containment tanks, grain storage silos and elevators, flour storage vessels, chemical storage or processing vessels, pharmaceutical or biological reaction or fermentation vessels, and/or alcohol fermentation, aging or storage vessels
[0034] In order to create and facilitate the inventive system and method, very accurate data concerning conditions within the vessel 42 must be obtained from specific known locations within the vessel 42. The known locations are related to the geometry of the vessel 42. In most cases a multi-point sensor, synonymously referred to as a sensor array 10, is positioned at the center axis of the vessel 42 and another sensor array is positioned proximate an inner wall surface of the vessel 42. Each sensor array has a plurality of sensors positioned in spaced apart fashion along a longitudinal axis of the sensor array. Each of the plurality of sensors 12, 14, 16, 18, 20 are spaced a known and predefined distance from adjacent sensors and the inter-sensor spacing is the same between sensor arrays 10. An example of a sensor array is depicted in
[0035] The plurality of sensors in each of the first and second sensor arrays are electrically coupled to a microprocessor 22 that acquires signals from each of the sensors in the sensor array 10 and outputs digital data corresponding to the condition being sensed by each of the sensors. In accordance with one aspect of the invention, each of the plurality of sensors are temperature sensors. In accordance with another aspect of the invention, one or more of the plurality of sensors in a sensor array are selected from the group of sensors for flow, density, pressure, pH, Brix, carbon dioxide, or other chemical property or physical property.
[0036] As the system and method of the present invention is agnostic to vessel geometry, the vessel may be of any configuration known in the art, including cylindrical, cubic, tubular or other shaped vessel. The regression model may be adjusted to the match the dimensional confines of the vessel geometry. In some cases, the use of a multi-point sensor could be placed in the center of the vessel in any orientation as long as parallel or non-parallel measurements are taken elsewhere. Those skilled in the art will appreciate that where more known points from sensor data measurement are acquired, less interpolation is required. The inventive interpolation model allows for known data values to be supplemented with other sensor data obtained from any other region within the vessel.
[0037] Fermentation tanks 42, such as those employed in winemaking or beer making, are typically large, generally vertically oriented, stainless steel tanks. As alcohol fermentation is an exothermic process, the fluid within the tank 42 is subjected to temperature excursions that vary within the mass of fluid in the tank 42. It is customary to employ jacketing around the fermentation tank to circulate a thermal fluid, such as glycol, to control the temperature excursions and maintain the bulk of the fluid within the fermentation tank within acceptable temperature norms.
[0038] Containment tanks 42 are typically vertically oriented tanks with a large fluid chamber bounded by the tank. Wine fermentation tanks 42 are often cylindrical and have an upper lid opening to introduce material, such as fluids, solids or particulates, such as must, produced from freshly crushed grapes in winemaking, and a lower valve or other openings to allow for withdrawal of fluid and particulates from the tank 42.
[0039]
[0040] Since fermentation tanks 42 typically have thermal jacketing about their inner or outer periphery, it is preferable to avoid positioning the thermowells 48, 50, such that their entry points into the tank 42 penetrates into the thermal jacketing. It has been found advantageous to employ a first thermowell 48 positioned centrally within the tank 42, i.e., extending vertically along the central axis C of the tank 42 and having a radius bend such that passes through a top surface 46 of the tank 42 offset from the center of the top surface 46. A second thermowell 50 is positioned radially offset R from the first thermowell 48 and proximate to an inner edge 47 of the fluid chamber 43 and extending vertically into the fluid chamber 43 and parallel to both the inner edge 47 of the fluid chamber 43 and the first thermowell 48. The second thermowell 50 may be positioned at any desirable position in the tank 42 and spaced a known distance D from the first thermowell 48. It is preferable that the second thermowell 50 projects directly through the top surface 48 of the tank without a bend such that it does not penetrate the thermal jacket.
[0041] At least one sensor array 52, 54 is placed into each of the first and second thermowells 48, 50. As discussed above, each sensor array 52, 54 has a plurality of sensors positioned at known spaced apart distances d.sub.1, d.sub.2, d.sub.3 . . . d.sub.n. Similarly, the radial distance R between the first thermowell 48 and the second thermowell 50 may be segmented into plural known units D.sub.r defining longitude lines 57a, 57b, 57c, 57d, 57e 57f.
[0042] A suitable sensor array is described in U.S. Pat. No. 7,004,624, which is hereby incorporated by reference and referred to as the '624 Patent. As described in the '624 patent a thermal sensor probe includes a plurality of digital temperature sensors housed in a thermally conductive housing. The probe includes a bus connected to each of the plurality of digital temperature sensors and a controller coupled to each sensor via the bus which collects temperature data from each of the sensors. In accordance with the present invention, the temperature sensors linearly arrayed along a common bus backbone and are in thermal contact with an inner wall surface of the thermowell. The thermowell is thermally conductive and communicates the temperature of the fluid contacting an outer surface of the thermowell to each of the temperature sensors.
[0043] Those skilled in the art will understand that other types of digital and/or analog sensors, including without limitation, for example, density sensors, Brix sensors, flow sensors, volume sensors, carbon dioxide sensors, pH sensors, or the like, which are suitable for different conditions to be monitored and/or controlled within the containment vessel, may also be incorporated into the sensor array or may be incorporated into the system in separate thermowells, in known positions along the sensor arrays and within the tank. In this manner, the data from the other digital and/or analog sensors may be acquired, interpolated and displayed in a manner similar to the data from the temperature probes. For example, in one aspect of the present invention, a fork density sensor (Micro Motion, Inc. Boulder, Colorado, distributed by Emerson Automation, such as that described in U.S. Patent Application Publication No. US2016/0109345, which is hereby incorporated by reference in its entirety) is positioned passing through a side wall of the tank and proximate the bottom inner surface of the tank in a lower portion of the tank where solids collect. In accordance with the present invention, data from the density sensor may be used to derive Brix values or, alternatively, a Brix sensor is positioned proximate the density sensor and in proximity to an output valve on the tank. A screen is employed to cover the density sensor, the Brix sensor, if present, and the output valve. The screen has an opening size sufficient to allow for fluid flow through the screen but to exclude solids which risk confusing the sensors and providing inaccurate data. Moreover, the screen allows for fluid flow into and through the output valve and allows for accurate readings of density and Brix in the fluid during pump overs.
Interpolation Model
[0044] The interpolation model uses the series of three-dimensional data points from the sensors and interpolates data points from the known sensor data into the three-dimensional space bounded by the known data points. From this interpolated data, regression modeling is applied to identify data relationships and trends. The interpolation schema 60 in tank 42 is represented in
[0045] The known and interpolated data values are then laid into a 2D matrix or table to represent geometric properties of the containment vessel along any desired longitudinal or latitudinal slice through the tank 42.
[0046] The interpolated data values from
[0047] It will be appreciated by one skilled in the art, that by positioning the plurality of sensors to define axes within the tank, the area within the tank is effectively divided into a three-dimensional grid. This three-dimensional regular grid then allows for application of known three-dimension interpolation techniques to interpolate condition values, for example temperature or density values, across the three dimensional grid based upon the known data points. In a cylindrical vessel with two parallel or non-parallel multi-point temperature sensors (center and edge) the results are assumed to be radially congruent and the edge multi-point sensor data is replicated for the diametrically opposite edge of the vessel. Alternatively, additional multi-point sensors may be placed in thermowells in different positions within the vessel, relative to the first and second thermowells, in order to generate actual data across other spatial points about the longitudinal or latitude lines within the vessel or to create additional axes corresponding to different sensor positions. The interpolation model of the present invention will operate on known data points anywhere within the vessel.
[0048] Known methods of three dimensional interpolation are exemplified by Lekien, F., et al., Tricubic interpolation in three dimensions, Int. J. Numer. Meth. Engng., 2005; 63:455-471, incorporated herein by reference, describe a local tricubic interpolation scheme in three dimensions. Alternatively, trilinear interpolation is a method of multivariate interpolation on a 3-dimensional regular grid and may be used to interpolate sensor data across the area of the interior chamber of the tank.
[0049] As the thermal state of the fluid within a containment tank, particularly a fermentation tank, is constantly changing, the interpolation model will preferably run dynamically or constantly and generate a dynamically updated image of the conditions within the containment vessel. For example, during what is known as a pump over, relatively colder fluid that collects at the bottom of the tank is pumped from the bottom of the tank to the top of the tank where there is relatively warmer fluid. The thermal effects of this pump over mixing may be closely monitored in real time using the image generated from the interpolation model of the present invention and guide the user in evaluating the duration and effectiveness of the pump over to the overall temperature profile of the fluid mass in the vessel. Another example is monitoring the thermal and density effects of yeast inoculation into the fluid within the vessel. The exothermic reaction of the yeast with sugars in the fluid may be monitored in real time and the temperature profile may be monitored and controlled within defined parameters based upon the monitoring of the interpolation model data. Further, carbon dioxide released during the fermentation process will affect the density of the fluid within the vessel and the density variances and gradients may be monitored and controlled by adjusting the temperature within the vessel and, therefore, the kinetics of the fermentation reaction.
Response Logic
[0050] As noted above, fermentation vessels, such as those used in wine making, typically employ one or more thermal jackets through which a thermal fluid, such as glycol, is recirculated from a heat exchanger through the thermal jackets. The thermal fluid flow through the one or more thermal jackets may be operated automatically in response to a logic control circuit with input from the plurality of sensors or may be operated manually or both. The logic control circuit is electrically coupled to a plurality of valves that control flow of thermal fluid into and out of the one or more thermal jackets in response to the data signals from the plurality of sensor arrays. Where there is more than one thermal jacket, each thermal jacket may operate independently of other thermal jackets to heat or cool the individual thermal jackets independent of one another. In wine making, for example, the thermal gradients within the fermentation tank tend to be controllable within well-defined ranges. Thus, typically one or more thermal jackets may be cooled simultaneously, at the same or different cooling rates, or the one or more thermal jackets may be heated simultaneously, at the same or different heating rates, or the one or more thermal jackets may be independently cooled or heated without cooling or heating other thermal jackets. Typically, however, where there is a plurality of thermal jackets on a fermentation tank, simultaneous heating and cooling is not preferred.
Control Interface
[0051] The plurality of sensors output data signals corresponding to the conditions being sensed, monitored and/or controlled within the tank. Analog signals are converted to digital signals and all data signals are communicated to a network server, which may be a local area network server or a cloud server. The data signals from the sensor arrays are processed at the server and may be combined with other data at the server, such as geospatial data, batch identifier data, tank identifier data, thermal jacket temperature data, time data, activity data, chemical data, ambient environmental data, trend data or any such other data as is desirable to visualize and correlate with the data from the plurality of sensors on a graphical display or displays. Control screens employ series of derived data to create a display visualization on the control screen and provide a graphical user interface that allows a user to interact with various data and data sources displayed on the control screen.
[0052] Data relevant to each container and its contents is stored in one or more databases accessible by the server. In this manner, process data related to the current batch processing may be compared against historical data for similar conditions within the tank, identify what processes were employed under such similar conditions and, thereby, allow for modeling of conditions and their response to various controls over time. Moreover, the historical data preferably contains identifying information about the contents of the tank. Such content identifying information may include, for example, geospatial data identifying the origin of the container contents, e.g., field, lot, row, GPS coordinates, etc., date, time or environmental condition data, for example, the harvest date and time, the crush date and time, environmental conditions existing on the harvest date or crush date, environmental conditions for the growing season, soil conditions, or the like. All of the data stored in the one or more databases is accessible for use displaying on the control screens and in modeling the conditions within the tank and most desirable control parameters for such conditions.
[0053]
[0054] It will be appreciated by those skilled in the art that the data acquired and interpolated by the present system and method, together with regression modeling of that data, serves as a strong basis for machine learning or artificial intelligence applied to monitoring and control wine fermentation processes or other processes in which control over conditions within a containment vessel are required. Virtually any type of repetitive processing where material is either processed or stored in containment vessels will benefit from the system and method of the present invention. The machine learning or artificial intelligence aspect of the present invention allows for consistently better monitoring and tighter control over the repetitive processes within a containment tank. Additionally, because the system and method of the present invention provide a large amount of data continuously over a period of time in a three-dimensional environment, augmented reality applications are well-suited to use with the present invention. For example, the visual interface used in many augmented reality applications is worn on a user's head and three-dimensional images are displayed in the visual interface and may be manipulated either by the user moving her head, eyes, hands, fingers or her body position. In this manner, augmented reality interfaces will allow for three-dimensional visualization with a containment vessel of the state of conditions within any spatial position within the containment vessel. Access to this level of spatial information will allow the user a level of monitoring at the level of the three-dimensional unit defined by the interpolation model, i.e., the smaller the three-dimensional unit, e.g., a cubic unit, the finer resolution the user will have over monitoring conditions with the containment vessel. Similarly, with finer resolution, the user will have a correspondingly greater level of control to allow for either automatic interventions or manual interventions.
Alternative Applications
[0055] The benefits of understanding the thermal state of a vessel are not limited to the wine industry. The concept can be applied to any environment where complex inhomogeneous or homogeneous thermal environments need to be controlled or studied. This would work both with a mixing environment where controlled homogeneity is trying to be accomplished and verified. Similarly, it would be beneficial with a vessel where no mixing occurs and a thermally inhomogeneous environment requires understanding. Any application that undergoes a biological reaction, such as in pharmaceuticals, temperature control and its understanding is critical. Chemical processing where exothermic reactions occur in vessels could be more closely monitored. Cooling and heating elements on vessels could be more tightly governed as temperature conductance and convection is visualized. Also, the process can be applied to any medium at any density. Liquid, solid, gaseous states or even a mixture of these in a vessel would still benefit from this technology. The method of measurement and form of regression model can change for optimization regardless of the product being thermally interpolated.
[0056] While the invention has been described with reference to its exemplary embodiments, those skilled in the art will understand and appreciate that the regression model described in the present invention is not limited to the specific examples provided herein. Rather, the scope of the present invention is intended to be construed only with reference to the appended claims.