Digital control system for intelligent production of liquid beverage

Abstract

The invention discloses a liquid beverage intelligent production digital control system, and the system comprises a material mixing module which is used for dynamically adjusting the stirring speed and the stirring direction based on preset parameters; the sensor module is connected with the mixing module and is used for monitoring the shear stress of the high-viscosity liquid beverage in real time and acquiring data for transmission; the control module is connected with the material mixing module and the sensor module and used for adjusting the temperature and pressure of the material mixing module according to data fed back by the sensor module and optimizing the particle refining process; the pause module is connected with the material mixing module and the control module and is used for periodically pausing stirring of the material mixing module in the stirring process and releasing bubbles and heat generated due to overlarge shear stress; according to the digital control system for intelligent production of the liquid beverage, the problem that in the prior art, in the high-viscosity liquid beverage mixing process, due to the fact that shear stress is too large, particles are refined unevenly is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of food processing, and in particular to a digital control system for intelligent production of liquid beverages. Background Art

[0002] In the field of food processing, the mixing process of liquid beverages is an important link, especially the mixing of high-viscosity liquid beverages. Such liquids usually contain granular substances, such as pulp particles, emulsified particles or other suspended particles. In order to ensure the taste and stability of the beverage, the refinement and distribution of these particles are required to reach a uniform standard.

[0003] Traditional high-viscosity liquid beverage mixing equipment usually relies on high-speed rotating parts or shearers to achieve particle refinement by applying large shear stress. However, in actual use, due to the rheological properties of high-viscosity liquids, high-speed shearing can cause local over-mixing, resulting in uneven particle refinement. Particles in some areas are over-refined or even destroyed, while particles in other areas are insufficiently refined, which will directly affect the quality of the final product, resulting in poor taste and visual effects of the beverage. In addition, the application of high shear stress in high-viscosity liquids can also cause overheating problems, further exacerbating the phenomenon of uneven particle refinement. This problem is particularly prominent in beverage production where strict control of product physical properties and nutritional components is required. At present, although there are some improved technologies for this problem, such as reducing uneven shear stress by optimizing the structure of the mixing device or changing the mixing process parameters, these methods often have the limitations of complex processes, high energy consumption and increased equipment costs. Summary of the invention

[0004] The purpose of the present invention is to provide a digital control system for intelligent production of liquid beverages to solve the problem of uneven particle refinement caused by excessive shear stress during the mixing process of high-viscosity liquid beverages in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: a digital control system for intelligent production of liquid beverages, the system comprising: A mixing module for dynamically adjusting the stirring rate and direction based on preset parameters; The sensor module connected to the mixing module is used to monitor the shear stress of the high-viscosity liquid beverage in real time and obtain data for transmission; The control module connected to the mixing module and the sensor module is used to adjust the temperature and pressure adjustment parameters of the mixing module according to the data fed back by the sensor module, optimize the particle refinement process, and specifically adjust the particle refinement efficiency. Modeled as temperature and pressure regulating parameters The function of is: ; in, represents the particle refinement efficiency, Indicates temperature and pressure regulation parameters; Finding particle refinement efficiency by curve fitting The maximum value corresponding to , dynamically adjust temperature and pressure based on real-time data fed back by sensors, and continuously analyze particle refinement efficiency The changing trend of the parameters verifies the effect of parameter control; A pause module connected to the mixing module and the control module is used to periodically pause the mixing of the mixing module during the mixing process to release bubbles and heat generated by excessive shear stress; The homogenization processing module connected to the mixing module is used to homogenize the mixed liquid beverage to ensure uniform distribution of particles.

[0006] Preferably, the mixing module dynamically adjusts the stirring rate and stirring direction based on preset parameters, including: The particle motion trajectory during the stirring process is similar to an ellipse, and the distance from the particle to the stirring axis is defined as , calculate the stirring efficiency of the stirring process, improve the uniformity of particles by adjusting the stirring speed, adjust the relationship between the distance from the liquid particles to the stirring axis and the stirring rate in real time according to the liquid viscosity and particle distribution, and optimize the stirring direction and stirring rate. The stirring efficiency calculation formula is: ; in, Indicates the mixing efficiency, represents the distance from the particle to the stirring axis, represents the rotation trajectory position of the liquid particles in the stirring chamber, Indicates time, Indicates the stirring rate.

[0007] Preferably, the sensor module monitors the shear stress of the high-viscosity liquid beverage in real time, and acquires data for transmission, including: Use sensors to monitor shear stress fluctuations in real time and record the propagation speed of shear stress in the liquid and shear stress distribution in the liquid , solve the stress propagation characteristics in the liquid, and analyze the shear stress distribution in the liquid Gradient and shear stress wave propagation speed in liquid beverages , identify the area of ​​shear stress in the liquid, transmit the analysis results to the control module, adjust the mixing parameters to balance the stress distribution in the liquid, and solve the stress propagation characteristics in the liquid. The specific formula is: ; in, represents the shear stress distribution in the liquid, It represents the transmission speed of shear stress wave in liquid beverage. Indicates time, Represents the diffusion or concentration of shear stress in a liquid in space.

[0008] Preferably, the pause module periodically pauses the stirring of the mixing module during the stirring process to release bubbles and heat generated by excessive shear stress, including: Record the shear stress and temperature fluctuations during the stirring process, adjust the pause time and frequency, learn the best intermittent strategy, monitor the bubble release and heat loss during the stirring process, verify whether the strategy is optimized, continue to learn and adjust the intermittent strategy, and adjust the pause time and frequency. The specific formula is: ; in, Indicates the degree of change in pause time and frequency, Indicates the speed at which the control system of the pause module adapts. represents the real-time shear stress collected during the stirring process, It represents the real-time temperature data collected during the stirring process, and i and j represent the serial numbers.

[0009] Preferably, the homogenization processing module performs homogenization on the mixed liquid beverage to ensure uniform distribution of particles, including: The activation energy and pre-factor in the homogenization process are experimentally determined, and the rate constants at different processing temperatures are calculated. The pressure and temperature of the homogenization are adjusted according to the calculation results. The particle distribution is sampled and analyzed to ensure that the particle uniformity meets the target requirements. The specific formula for calculating the rate constant at different processing temperatures is: ; in, represents the rate constant of homogenization, B represents the initial efficiency of particle homogenization during homogenization, represents the minimum energy required for particle homogenization, D represents the energy scale during the processing, Indicates the processing temperature.

[0010] Preferably, the mixing module dynamically adjusts the stirring rate and stirring direction based on preset parameters and further comprises: Measure the shear stress value S 1 , determine the threshold T 1 , according to the shear stress value S 1 With threshold T 1 Adjust the stirring rate F in relation to 1 , when S 1 >T 1 When S1 <T 1 Increase the stirring rate; Based on the height H of the liquid in the mixing tank 1 Adjust stirring direction D 1 , when H 1 >H 0 When the stirring direction is up and down, when H 1 <H 0 When stirring, use the side stirring direction; Stirring rate adjustment range ΔF 1 According to the shear stress value S 1 and the target shear stress value S 2 The proportion of the difference is adjusted; Adjust the stirring rate F each time 1 After that, record the change in shear stress ΔS before and after adjustment. 1 .

[0011] Preferably, the height H of the liquid in the mixing tank 1 Adjust stirring direction D 1 include: Measure the height H of the liquid in the mixing tank 1 ; According to the formula H 1 +ΔH 1 =H 2 Calculate the adjusted liquid height H 2 , where ΔH 1 is the height change during the last stirring process; When H 2 >H 0 When setting the stirring direction D 1 The stirring direction is up and down; When H 2 <H 0 When setting the stirring direction D 1 is the lateral stirring direction, where H 0 Indicates the reference height threshold for stirring direction adjustment.

[0012] Preferably, the height H of the liquid in the mixing tank is measured 1 include: Using Ultrasonic Sensor 1 Measure the initial height H 0 , and the initial height H 0 As a reference height threshold for stirring direction adjustment; According to the formula H 3 =U 1 ×C 1 Calculate the actual height H 3 , where C 1is the ratio of ultrasonic velocity to liquid density; Repeat the measurement 3 times and take the average value H 3avg , as the final liquid height H 1 ; Calibrate Ultrasonic Sensor U 1 , ensuring that the measurement error is within 5%.

[0013] Preferably, the ultrasonic sensor U 1 Measure the initial height H 0 include: Transmit ultrasonic signals to the liquid surface in the mixing tank; Receive the reflected ultrasonic signal and calculate the signal round trip time t 1 ; According to the formula H 0 =V 1 ×t 1 / 2Calculate the initial height H 0 , where V 1 is the propagation speed of ultrasound in air; Record the time difference between transmission and reception.

[0014] Preferably, the step of transmitting an ultrasonic signal to the surface of the liquid in the mixing tank comprises: Check the ultrasonic sensor U 1 Working status to ensure normal work; According to the formula P 1 =P 0 ×e α×D Adjust the power P of the ultrasonic signal 1 , where P 0 is the initial power, α is the attenuation coefficient, D is the signal transmission distance, and e represents the base of the natural logarithm; Continue to emit ultrasonic signals for 3 seconds to ensure that the inner surface of the mixing tank is fully covered.

[0015] It can be seen from the above technical solution that the present invention has the following beneficial effects: The digital control system for intelligent production of liquid beverages dynamically adjusts the stirring rate and stirring direction based on preset parameters through the mixing module, the sensor module monitors the shear stress of the high-viscosity liquid beverage in real time and obtains data for transmission, the control module adjusts the temperature and pressure of the mixing module according to the data fed back by the sensor module, optimizes the particle refinement process, the pause module periodically pauses the stirring of the mixing module during the stirring process, releases bubbles and heat generated by excessive shear stress, and the homogenization processing module homogenizes the mixed liquid beverage to ensure uniform distribution of particles, thereby achieving uniform refinement and distribution of particles in the liquid, eliminating the problem of local over-mixing or insufficient refinement caused by traditional mixing equipment, thereby greatly improving the taste and visual effect of the beverage, effectively reducing the overheating problem caused by high-speed shearing during the mixing process, avoiding the loss of product physical properties and nutrients, ensuring the quality stability of the beverage, achieving a significant reduction in energy consumption, simplifying the operation and maintenance of the equipment, reducing production costs, and solving the problem of uneven particle refinement caused by excessive shear stress in the mixing process of high-viscosity liquid beverages in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the connection of the system modules of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figure 1 As shown, the present invention provides a technical solution: a digital control system for intelligent production of liquid beverages, the system comprising: A mixing module for dynamically adjusting the stirring rate and direction based on preset parameters; The sensor module connected to the mixing module is used to monitor the shear stress of the high-viscosity liquid beverage in real time and obtain data for transmission; The control module connected to the mixing module and the sensor module is used to adjust the temperature and pressure adjustment parameters of the mixing module according to the data fed back by the sensor module, optimize the particle refinement process, and specifically adjust the particle refinement efficiency. Modeled as temperature and pressure regulating parameters The function of is: ; in, represents the particle refinement efficiency, Indicates temperature and pressure regulation parameters; Finding particle refinement efficiency by curve fitting The maximum value corresponding to , dynamically adjust temperature and pressure based on real-time data fed back by sensors, and continuously analyze particle refinement efficiency The changing trend of the parameters verifies the effect of parameter control; A pause module connected to the mixing module and the control module is used to periodically pause the mixing of the mixing module during the mixing process to release bubbles and heat generated by excessive shear stress; The homogenization processing module connected to the mixing module is used to homogenize the mixed liquid beverage to ensure uniform distribution of particles.

[0019] The digital control system for intelligent production of liquid beverages in the present invention realizes intelligent control of the particle refinement process of high-viscosity liquid beverages mainly by dynamically adjusting the operating parameters of the mixing module and comprehensively using the sensor module and the control module. The sensor module obtains key data such as shear stress in real time and feeds it back to the control module; the control module is based on a mathematical model. Optimize the temperature and pressure parameters of the mixing module to ensure that the particle refinement efficiency is optimal. At the same time, by pausing the module's periodic operation, release the bubbles and heat generated by excessive shear stress to avoid the deterioration of beverage quality due to excessive shearing. The homogenization module further homogenizes the particle distribution of the liquid beverage to ensure that the product has consistency and excellent taste. The particle refinement efficiency is maximized through real-time data feedback from the sensor and dynamic adjustment of the control module. The homogenization module significantly improves the uniform distribution of particles in liquid beverages, ensuring the consistency and stability of the finished product. The design of pausing the module to release bubbles and heat reduces unnecessary energy consumption and improves mixing efficiency. The digital control of the entire system simplifies the production process, reduces manual intervention, and improves production efficiency.

[0020] The mixing module dynamically adjusts the stirring rate and stirring direction based on preset parameters including: The particle motion trajectory during the stirring process is similar to an ellipse, and the distance from the particle to the stirring axis is defined as , calculate the stirring efficiency of the stirring process, improve the uniformity of particles by adjusting the stirring speed, adjust the relationship between the distance from the liquid particles to the stirring axis and the stirring rate in real time according to the liquid viscosity and particle distribution, and optimize the stirring direction and stirring rate. The stirring efficiency calculation formula is: ; in, Indicates the mixing efficiency, represents the distance from the particle to the stirring axis, represents the rotation trajectory position of the liquid particles in the stirring chamber, Indicates time, Indicates the stirring rate.

[0021] The stirring efficiency optimization of the present invention is based on the mathematical modeling of particle motion. The motion trajectory of the particle in the stirring chamber is abstracted as a quasi-circle, and its distance to the stirring axis is Determines the distribution of stirring efficiency. By adjusting the stirring rate and direction, making the particles more evenly distributed in the liquid, thereby improving the overall mixing effect.

[0022] The calculation formula of stirring efficiency is: ; It reflects the energy transfer relationship of particle movement. By adjusting the preset parameters in the system and monitoring the liquid viscosity in real time, it can be dynamically adjusted. and The matching relationship between the particles and the mixing axis is achieved to maximize the mixing efficiency. At the same time, the mixing direction is optimized to reduce particle agglomeration and ensure the uniformity and stability of the mixing. The mixing efficiency is greatly improved and the mixing time is shortened through mathematical modeling and parameter optimization based on the particle motion trajectory. The distance from the particle to the mixing axis is adjusted in real time. and stirring rate Significantly reduce the aggregation or sedimentation of particles. Dynamically control the stirring rate and direction, effectively reducing the energy consumption of the stirring process. The system can optimize the stirring parameters according to the real-time changes in liquid viscosity and particle distribution, thus adapting to the production of various types of liquid beverages.

[0023] The sensor module monitors the shear stress of high-viscosity liquid beverages in real time and obtains data for transmission, including: Use sensors to monitor shear stress fluctuations in real time and record the propagation speed of shear stress in the liquid and shear stress distribution in the liquid , solve the stress propagation characteristics in the liquid, and analyze the shear stress distribution in the liquid Gradient and shear stress wave propagation speed in liquid beverages , identify the area of ​​shear stress in the liquid, transmit the analysis results to the control module, adjust the mixing parameters to balance the stress distribution in the liquid, and solve the stress propagation characteristics in the liquid. The specific formula is: ; in, represents the shear stress distribution in the liquid, It represents the transmission speed of shear stress wave in liquid beverage. Indicates time, Represents the diffusion or concentration of shear stress in a liquid in space.

[0024] The present invention uses a sensor module to monitor the shear stress in high-viscosity liquid beverages in real time and analyzes the propagation characteristics of stress in combination with a mathematical model. The sensor records the propagation speed of the stress wave. and the displacement field of stress , according to the specific formula of stress propagation characteristics in liquid: ; Analyze the stress transfer behavior inside the liquid and identify areas with uneven shear stress. The analysis results are sent to the control module through the data transmission module, and the operating parameters of the mixing module (such as stirring rate and direction) are dynamically adjusted to balance the stress distribution inside the liquid. This process ensures the efficiency of the mixing process and significantly improves the uniformity of the mixing. The sensor module monitors the dynamic changes of shear stress in real time and accurately analyzes the stress propagation characteristics through the wave equation. By balancing the shear stress distribution in the liquid, the particle sedimentation and agglomeration phenomena are effectively reduced, and the uniformity of the mixing is improved. Combined with real-time monitoring and data analysis, the mixing parameters are optimized, the production time is shortened and the production efficiency is improved. The system can dynamically adjust the mixing strategy according to the liquid properties (such as viscosity changes) to adapt to different liquid beverage production needs.

[0025] The pause module periodically pauses the mixing of the mixing module during the mixing process to release bubbles and heat generated by excessive shear stress, including: Record the shear stress and temperature fluctuations during the stirring process, adjust the pause time and frequency, learn the best intermittent strategy, monitor the bubble release and heat loss during the stirring process, verify whether the strategy is optimized, continue to learn and adjust the intermittent strategy, and adjust the pause time and frequency. The specific formula is: ; in, Indicates the degree of change in pause time and frequency, Indicates the speed at which the control system of the pause module adapts. represents the real-time shear stress collected during the stirring process, It represents the real-time temperature data collected during the stirring process, and i and j represent the serial numbers.

[0026] The pause module collects the fluctuation data of shear stress and temperature of the liquid in real time during the mixing process, analyzes the changing trend of these data, and determines the optimal pause time and frequency in combination with the dynamic adjustment algorithm. Pausing the operation of the mixing module at an appropriate time effectively releases bubbles caused by high shear stress, reduces the local temperature of the liquid, and avoids the deterioration of liquid properties caused by heat accumulation. Pause parameter adjustment formula ; The pause time and frequency are linked to control shear stress and temperature. This dynamic strategy can optimize the stability and efficiency of the mixing process, reduce the accumulation of bubbles and heat, and thus improve the quality and effect of the mixing process. The pause module releases bubbles and heat generated by excessive shear stress at the appropriate time to improve the uniformity and quality of liquid beverages. Through real-time monitoring and learning algorithms, the pause time and frequency are automatically adjusted to ensure the best implementation of the pause strategy. By regulating temperature and shear stress, the problem of liquid quality degradation caused by overheating or excessive shearing is avoided. Optimizing the pause strategy reduces unnecessary mixing energy consumption and improves production efficiency.

[0027] The homogenization module homogenizes the mixed liquid beverage to ensure uniform distribution of particles, including: The activation energy and pre-factor in the homogenization process are experimentally determined, and the rate constants at different processing temperatures are calculated. The pressure and temperature of the homogenization are adjusted according to the calculation results. The particle distribution is sampled and analyzed to ensure that the particle uniformity meets the target requirements. The specific formula for calculating the rate constant at different processing temperatures is: ; in, represents the rate constant of homogenization, B represents the initial efficiency of particle homogenization during homogenization, represents the minimum energy required for particle homogenization, D represents the energy scale during the processing, Indicates the processing temperature.

[0028] The present invention homogenizes the mixed liquid beverage through a homogenization processing module, using the rate constant formula: ; Optimize and control the temperature and pressure of the homogenization process. The core of homogenization is to control the energy input required for particle homogenization and the effect of temperature on the rate constant. Real-time measurement of particle distribution and degree of homogenization, feedback of data to the control module, dynamic adjustment of processing temperature and pressure, to ensure that the uniformity of particle distribution meets the target requirements. Experimental measurement and sampling verification further optimize the processing parameters to ensure the quality and consistency of the final product. By dynamically adjusting the temperature and pressure of the homogenization process, the uniform distribution of liquid particles can be significantly improved. Through the calculation of rate constants and sampling analysis, the homogenization effect is verified and the processing parameters are continuously optimized to ensure the stability of product quality. The system can adapt to the homogenization processing needs of different types of liquid beverages and has wide applicability and flexibility.

[0029] The mixing module dynamically adjusts the stirring rate and stirring direction based on preset parameters and also measures the shear stress value S 1 , determine the threshold T 1 , according to the shear stress value S 1With threshold T 1 Adjust the stirring rate F in relation to 1 , when S 1 >T 1 When S 1 <T 1 When the stirring rate is increased; based on the height H of the liquid in the mixing tank 1 Adjust stirring direction D 1 , when H 1 >H 0 When the stirring direction is up and down, when H 1 <H 0 When the stirring direction is sideways, the adjustment range of the stirring rate is ΔF 1 According to the shear stress value S 1 and the target shear stress value S 2 Each time the stirring rate F is adjusted 1 After that, record the change in shear stress ΔS before and after adjustment. 1 .

[0030] The present invention monitors the shear stress value S in real time through the mixing module 1 , Liquid height H 1 Key parameters, and dynamically adjust the stirring rate R 1 and stirring direction D 1 When the shear stress S 1 Exceeding the threshold T 1 When S 1 Lower than T 1 When the mixing effect is enhanced by increasing the stirring rate, the stirring direction is adjusted based on the liquid height H. 1 When the liquid height is high (H 1 >H 0 ), using up and down stirring direction helps reduce the risk of particle sedimentation in the liquid; when the liquid height is low (H 1 <H 0 ), using the side stirring direction to mix the liquid more efficiently. In addition, by recording the change in shear stress ΔS before and after the stirring rate adjustment 1 The system can evaluate the effect of the adjustment strategy and further optimize the control parameters to achieve a dynamic and efficient mixing process. Real-time monitoring and control based on shear stress value avoids liquid quality problems caused by too high or too low stirring rate. 1 Real-time detection and dynamic adjustment of stirring direction improve the mixing efficiency under different liquid level conditions. Stirring rate adjustment range ΔR 1 Proportional control based on shear stress deviation makes regulation more precise and energy utilization more efficient. Record shear stress change value ΔS1 It provides important data support for subsequent optimization of adjustment strategies and realizes intelligent production.

[0031] Based on the height H of the liquid in the mixing tank 1 Adjust stirring direction D 1 Including measuring the height H of the liquid in the mixing tank 1 According to formula H 1 +ΔH 1 =H 2 Calculate the adjusted liquid height H 2 , where ΔH 1 is the height change during the last stirring process; when H 2 >H 0 When setting the stirring direction D 1 The stirring direction is up and down; when H 2 <H 0 When setting the stirring direction D 1 is the lateral stirring direction, where H 0 Indicates the reference height threshold for stirring direction adjustment.

[0032] The present invention monitors the liquid height H in the mixing tank in real time. 1 , and combined with the change value of the liquid height ΔH, dynamically calculate the adjusted liquid height H 2 The change of liquid height may be affected by the stirring rate, liquid fluidity and mixing efficiency, so the choice of stirring direction is optimized through the dynamic change feedback of height: Up and down stirring direction: when H 2 >H 0 When stirring, the up and down stirring direction is adopted, which can fully stir the high liquid level liquid, reduce the sedimentation of surface particles, and avoid stratification; Lateral stirring direction: When H 2 <H 0 When mixing, the side stirring direction is adopted to mix the low liquid level liquid more efficiently, enhance local fluidity, and improve stirring uniformity. Through this solution, the stirring direction can be intelligently and dynamically adjusted during the mixing process to adapt to different liquid level conditions and optimize the mixing efficiency and uniformity.

[0033] By real-time monitoring and calculation of liquid height changes, the timeliness and accuracy of stirring direction adjustment are ensured. Dynamic adjustment of stirring direction is optimized according to liquid level conditions to improve mixing effect and energy efficiency. It adapts to the mixing needs of different liquid heights and can achieve automatic adjustment without manual intervention. The up-and-down stirring direction effectively avoids the stratification problem of high-level liquid, while the lateral stirring direction enhances the fluidity of low-level liquid.

[0034] Measure the height H of the liquid in the mixing tank 1Including the use of ultrasonic sensors U 1 Measure the initial height H 0 , and the initial height H 0 As the reference height threshold for adjusting the stirring direction; according to the formula H 3 =U 1 ×C 1 Calculate the actual height H 3 , where C 1 is the ratio of ultrasonic velocity to liquid density; repeat the measurement 3 times and take the average value H 3avg , as the final liquid height H 1 ; Calibrate ultrasonic sensor U 1 , ensuring that the measurement error is within 5%.

[0035] The present invention uses an ultrasonic sensor to measure the liquid height, combining the correction coefficient C of the liquid density and the ultrasonic velocity. 1 , accurately calculate the actual height H 3 By taking the average value through repeated measurements, random errors that may occur during the measurement process are eliminated, further improving the accuracy of the results. At the same time, the ultrasonic sensor is calibrated regularly to ensure that the equipment always maintains high accuracy during long-term use, and the error rate is controlled within 5%, thereby providing reliable data support for subsequent adjustment of the stirring direction and rate. 1 The average value of repeated measurements is used to ensure the accuracy and stability of the liquid height measurement results. The sensor is calibrated regularly to control the measurement error within 5% and improve the reliability of the measurement system. Combined with liquid density correction, it adapts to the physical properties of different liquids to ensure the versatility of height calculation. It provides accurate liquid level data support for subsequent stirring direction adjustment, thereby improving mixing efficiency and uniformity.

[0036] Using Ultrasonic Sensor 1 Measure the initial height H 0 It includes transmitting ultrasonic signals to the liquid surface in the mixing tank; receiving the reflected ultrasonic signals and calculating the round trip time t 1 According to formula H 0 =V 1 ×t 1 / 2Calculate the initial height H 0 , where V 1 is the propagation speed of ultrasound in the air; record the time difference between emission and reception.

[0037] The present invention utilizes the transmitting and receiving functions of the ultrasonic sensor U, transmits ultrasonic signals to the liquid surface and records the time t required for the signal to return. 1 , combined with the propagation speed of ultrasound in air V 1 , calculate the initial height H of the liquid1 Formula H 1 =V 1 ×t 1 / 2 ensures accurate calculation of liquid level height. By recording the time difference between transmission and reception, the system can measure the round trip time of the signal with high precision and provide support for multiple measurements to eliminate the influence of environmental noise or other interference on height measurement. By calculating the round trip time of the ultrasonic signal, the initial height H of the liquid can be determined with high precision. 1 The ultrasonic sensor adopts non-contact measurement to avoid disturbance of the liquid surface and is applicable to a variety of liquid types. The time difference recording mechanism between transmission and reception provides real-time liquid level measurement function to meet the needs of dynamic liquid level monitoring. Combined with the ultrasonic velocity V in the air 1 Correction ensures measurement accuracy under different environmental conditions.

[0038] Transmitting ultrasonic signals to the liquid surface in the mixing tank includes checking the ultrasonic sensor U 1 Working state, to ensure normal work; according to the formula P 1 =P 0 ×e α×D Adjust the power P of the ultrasonic signal 1 , where P 0 is the initial power, α is the attenuation coefficient, D is the signal transmission distance, and e represents the base of the natural logarithm; the ultrasonic signal is continuously emitted for 3 seconds to ensure that the inner surface of the mixing tank is fully covered.

[0039] The present invention adjusts the power of the ultrasonic signal to ensure that the signal can be stably transmitted to the liquid surface in the mixing tank and cover the entire surface area. Power adjustment formula P 1 =P 0 ×e α×D It is used to compensate for the attenuation of the signal caused by the increase of distance D during the propagation process, and ensure that the signal strength is sufficient for reflection and reception. By checking the sensor status before transmitting the ultrasonic signal, ensure that the ultrasonic transmitting equipment is in normal working condition and avoid measurement errors caused by equipment failure. At the same time, continue to transmit the signal for 3 seconds to ensure that the signal fully covers the liquid surface, reduce the measurement blind area, and provide reliable data support for height measurement. Dynamically adjust the power according to the signal transmission distance and attenuation to ensure that the signal strength is sufficient to cover the liquid surface and provide accurate measurement data. Ensure the stability of the transmitted signal and the reliability of the equipment by checking the working status of the ultrasonic sensor. Continue to transmit the signal for 3 seconds to avoid measurement errors caused by uneven signal coverage and improve the accuracy of height measurement. The power adjustment formula is suitable for mixing tanks of different sizes and different distance conditions, and has good adaptability and scalability.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A digital control system for intelligent production of liquid beverages, characterized in that: The system includes: A mixing module for dynamically adjusting the stirring rate and direction based on preset parameters; A sensor module connected to the mixing module for real-time monitoring of the shear stress of the high-viscosity liquid beverage and obtaining data for transmission; The control module connected to the mixing module and the sensor module is used to adjust the temperature and pressure adjustment parameters of the mixing module according to the data fed back by the sensor module, optimize the particle refinement process, and specifically adjust the particle refinement efficiency. Modeled as temperature and pressure regulating parameters The function of is: ； in, represents the particle refinement efficiency, Indicates temperature and pressure regulation parameters; Finding particle refinement efficiency by curve fitting The maximum value corresponding to , dynamically adjust temperature and pressure based on real-time data fed back by sensors, and continuously analyze particle refinement efficiency The changing trend of the parameters verifies the effect of parameter control; A pause module connected to the mixing module and the control module for periodically pausing the stirring of the mixing module during the stirring process to release the bubbles and heat generated due to excessive shear stress; A homogenization processing module connected to the mixing module for homogenizing the mixed liquid beverage to ensure uniform distribution of particles.

2. A liquid beverage intelligent production digital control system according to claim 1, characterized in that: The mixing module dynamically adjusting the stirring rate and direction based on preset parameters includes: The particle motion trajectory during the stirring process is similar to an ellipse, and the distance from the particle to the stirring axis is defined as , calculate the stirring efficiency of the stirring process, improve the particle uniformity by adjusting the stirring speed, adjust the relationship between the distance from the liquid particles to the stirring axis and the stirring rate in real time according to the liquid viscosity and particle distribution, and optimize the stirring direction and stirring rate. The stirring efficiency calculation formula is: ； in, Indicates the mixing efficiency, represents the distance from the particle to the stirring axis, represents the rotation trajectory position of the liquid particles in the stirring chamber, Indicates time, Indicates the stirring rate.

3. A liquid beverage intelligent production digital control system according to claim 1, characterized in that: The sensor module real-time monitoring of the shear stress of the high-viscosity liquid beverage and obtaining data for transmission includes: Use sensors to monitor shear stress fluctuations in real time and record the propagation speed of shear stress in the liquid and shear stress distribution in the liquid , solve the stress propagation characteristics in the liquid, and analyze the shear stress distribution in the liquid Gradient and shear stress wave propagation speed in liquid beverages , identify the area of ​​shear stress in the liquid, transmit the analysis results to the control module, adjust the mixing parameters to balance the stress distribution in the liquid, and solve the stress propagation characteristics in the liquid. The specific formula is: ； in, represents the shear stress distribution in the liquid, It represents the transmission speed of shear stress wave in liquid beverage. Indicates time, Represents the diffusion or concentration of shear stress in a liquid in space.

4. The liquid beverage intelligent production digital control system according to claim 1, characterized in that: The pause module periodically pausing the stirring of the mixing module during the stirring process to release the bubbles and heat generated due to excessive shear stress includes: Recording the shear stress and temperature fluctuations during the stirring process, adjusting the pause time and frequency, learning the optimal intermittent strategy, monitoring the bubble release and heat dissipation during the stirring process, verifying whether the strategy is optimized, continuously learning and adjusting the intermittent strategy, and the specific formulas for adjusting the pause time and frequency are: ； in, Indicates the degree of change in pause time and frequency, Indicates the speed at which the control system of the pause module adapts. represents the real-time shear stress collected during the stirring process, It represents the real-time temperature data collected during the stirring process, and i and j represent the serial numbers.

5. The liquid beverage intelligent production digital control system according to claim 1, characterized in that: The homogenization processing module homogenizing the mixed liquid beverage to ensure uniform distribution of particles includes: Experimentally determining the activation energy and pre-factor during the homogenization process, calculating the rate constant at different processing temperatures, adjusting the pressure and temperature of homogenization according to the calculation results, sampling and analyzing the particle distribution, ensuring that the particle uniformity meets the target requirements, and the specific formula for calculating the rate constant at different processing temperatures is: ； in, represents the rate constant of homogenization, B represents the initial efficiency of particle homogenization during homogenization, represents the minimum energy required for particle homogenization, D represents the energy scale during the processing, Indicates the processing temperature.

6. A liquid beverage intelligent production digital control system according to claim 1, characterized in that: The mixing module dynamically adjusting the stirring rate and direction based on preset parameters further includes: Measuring the shear stress value S1, determining the threshold value T1, adjusting the stirring rate F1 according to the relationship between the shear stress value S1 and the threshold value T1, reducing the stirring rate when S1>T1, and increasing the stirring rate when S1<T1; Adjusting the stirring direction D1 based on the height H1 of the liquid in the mixing tank, adopting the up-and-down stirring direction when H1>H0, and adopting the sideway stirring direction when H1<H0; The adjustment range ΔF1 of the stirring rate is adjusted according to the ratio of the difference between the shear stress value S1 and the target shear stress value S2; After each adjustment of the stirring rate F1, record the change value ΔS1 of the shear stress before and after the adjustment.

7. A liquid beverage intelligent production digital control system according to claim 6, characterized in that: The adjusting the stirring direction D1 based on the height H1 of the liquid in the mixing tank includes: Measuring the height H1 of the liquid in the mixing tank; Calculating the adjusted liquid height H2 according to the formula H1+ΔH1=H2, where ΔH1 is the height change amount during the previous stirring process; When H2>H0, set the stirring direction D1 as the up-and-down stirring direction; When H2<H0, set the stirring direction D1 as the sideway stirring direction, where H0 represents the reference height threshold for adjusting the stirring direction.

8. A liquid beverage intelligent production digital control system according to claim 7, characterized in that: The measuring the height H1 of the liquid in the mixing tank includes: Using the ultrasonic sensor U1 to measure the initial height H0 and taking the initial height H0 as the reference height threshold for adjusting the stirring direction; Calculating the actual height H3 according to the formula H3=U1×C1, where C1 is the ratio of the ultrasonic velocity to the liquid density; Repeat the measurement 3 times and take the average value H 3avg , as the final liquid height H1; Calibrate the ultrasonic sensor U1 to ensure that the measurement error is within 5%.

9. A liquid beverage intelligent production digital control system according to claim 8, characterized in that: The use of the ultrasonic sensor U1 to measure the initial height H0 includes: Transmit ultrasonic signals to the liquid surface in the mixing tank; Receive the reflected ultrasonic signal and calculate the signal round trip time t1; The initial height H0 is calculated according to the formula H0=V1×t1 / 2, where V1 is the propagation speed of ultrasound in the air; Record the time difference between transmission and reception.

10. A liquid beverage intelligent production digital control system according to claim 9, characterized in that: The transmitting of ultrasonic signals to the liquid surface in the mixing tank comprises: Check the working status of ultrasonic sensor U1 to ensure normal operation; According to the formula P1=P0×e α×D Adjust the power P1 of the ultrasonic signal, where P0 is the initial power, α is the attenuation coefficient, D is the signal transmission distance, and e represents the base of the natural logarithm; Continue to emit ultrasonic signals for 3 seconds to ensure that the inner surface of the mixing tank is fully covered.

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