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CN-121972070-A - Material flow self-adaptive control system in seasoning continuous proportioning process

CN121972070ACN 121972070 ACN121972070 ACN 121972070ACN-121972070-A

Abstract

The invention discloses a material flow self-adaptive control system in a seasoning continuous proportioning process, which relates to the technical field of seasoning proportioning control, and comprises a main conveying unit, a main control unit and a main control unit, wherein the main conveying unit is used for continuously conveying liquid basic seasonings; the auxiliary material feeding unit is connected with the output pipeline of the main conveying unit in a converging way and is used for continuously adding solid seasoning auxiliary materials into the liquid basic seasoning; the invention senses the rheological state of the main material on line through coupling analysis of pipeline pressure difference and pump power signals, and dynamically feedforward compensates auxiliary material proportion setting according to the rheological state, thereby forming compound control, and being capable of relatively effectively and adaptively counteracting the influence of natural fluctuation of the main material characteristics on the mixing uniformity.

Inventors

  • HUANG BAIQIU

Assignees

  • 广东陶味园食品科技有限公司

Dates

Publication Date
20260505
Application Date
20260202

Claims (10)

  1. 1. A material flow adaptive control system in a seasoning continuous proportioning process, the system comprising: the main conveying unit is used for continuously conveying the liquid basic seasoning and comprises a conveying pump, a pressure detection unit and a flow detection unit, wherein the pressure detection unit and the flow detection unit are arranged on a pump outlet pipeline; the auxiliary material feeding units are connected with the output pipeline of the main conveying unit in a converging way and are used for continuously adding solid seasoning auxiliary materials into the liquid basic seasoning, and each auxiliary material feeding unit comprises a precise feeding device and an auxiliary material flow detection device arranged at a discharge hole of the auxiliary material feeding unit; The temperature detection unit is used for detecting the temperature of the liquid basic seasoning in real time; The controller is respectively connected with the main conveying unit, the auxiliary material feeding unit, the pressure detection unit, the flow detection unit, the auxiliary material flow detection device and the temperature detection unit in a signal manner; The controller is configured to calculate and set initial theoretical flow of each material according to a preset production formula, synchronously collect operation data from the pressure detection unit, the flow detection unit, the temperature detection unit and each auxiliary material flow detection device in real time, calculate an equivalent physical characteristic observation value reflecting the current rheological characteristic of the liquid basic seasoning based on the collected liquid basic seasoning pipeline pressure data, pump operation parameters, flow data and pipeline geometric parameters, dynamically calculate a compensation coefficient for correcting the target flow of the solid seasoning auxiliary material according to the equivalent physical characteristic observation value and the flow data collected in real time, generate a composite control instruction according to the target flow of the solid seasoning auxiliary material corrected by the compensation coefficient and the corresponding real-time actual flow thereof, and send the composite control instruction to the corresponding auxiliary material feeding unit so as to realize self-adaptive control of material proportioning.
  2. 2. The adaptive control system for material flow in a continuous seasoning proportioning process according to claim 1, wherein the pressure detecting unit comprises at least a first pressure sensor and a second pressure sensor which are arranged along the flowing direction of the liquid basic seasoning at intervals of a specific pipeline length, and are used for obtaining pressure values of two ends of the pipe section.
  3. 3. The adaptive control system for material flow in a continuous seasoning proportioning process of claim 2 wherein the controller is further configured to calculate a measured pressure gradient based on the sensed values of the first and second pressure sensors while calculating an average flow rate based on the real-time mass flow rate of the liquid base seasoning, the known reference density and the cross-sectional area of the pipe as measured by the flow sensing unit.
  4. 4. The system of claim 3, wherein the controller is further configured to calculate an equivalent physical characteristic observation value of the liquid base seasoning under the current working condition by combining the actual measured pressure gradient, the average flow rate, the real-time driving current of the delivery pump, the real-time mass flow of the liquid base seasoning, known electrical parameters, efficiency parameters, pipeline geometric parameters and preset weight coefficients of the delivery pump through a specific coupling observation algorithm, wherein the observation value comprehensively reflects the change of rheological characteristics such as viscosity and the like of the liquid base seasoning relative to a reference state.
  5. 5. The adaptive control system for material flow in a continuous seasoning proportioning process according to claim 4, wherein the specific coupling observation algorithm is integrated with a direct calculation term based on an actual measurement pressure gradient and an indirect calculation term based on a relation between a pump driving current and a flow, and the weight coefficient is used for balancing the influence of the two terms and is determined through calibration of the system in a reference state.
  6. 6. The adaptive control system for material flow in a continuous seasoning proportioning process of claim 5 wherein the controller is further configured to dynamically calculate the compensation factor by a predetermined nonlinear compensation function based on a calculated ratio of the current equivalent physical property observation to a predetermined reference physical property value in combination with a real-time flow of the liquid base seasoning to a predetermined flow ratio.
  7. 7. The system of claim 6, wherein the nonlinear compensation function comprises a power law operation term and an index operation term taking the ratio as a variable, the index operation term further introduces a coupling effect of the ratio of the real-time flow rate to the set flow rate of the liquid basic seasoning, and constant parameters in the power law operation term and the index operation term are predetermined according to the mixing process characteristics of the specific liquid basic seasoning and the solid seasoning auxiliary material.
  8. 8. The adaptive control system for material flow in a continuous seasoning proportioning process of claim 7 wherein the controller is further configured to multiply the initial theoretical flow set point of each solid seasoning by a feedback correction factor of the ratio of the current system actual total flow to the target total flow and by the compensation factor to obtain the real-time target flow after compensation of the solid seasoning.
  9. 9. The adaptive control system for material flow in a continuous seasoning proportioning process according to claim 8, wherein the controller is further configured to compare the compensated real-time target flow with the real-time actual flow fed back by the auxiliary material flow detection device for each solid seasoning auxiliary material, obtain a first adjustment amount through a feedback control algorithm, simultaneously, apply the compensation coefficient as a feedforward factor to a basic control instruction of the precise feeding device to generate a second adjustment amount, and finally combine the first adjustment amount and the second adjustment amount to form the composite control instruction so as to adjust the blanking rate of the precise feeding device.
  10. 10. The adaptive control system for material flow in a continuous seasoning proportioning process of claim 1 wherein the controller is further configured to perform the steps of data acquisition, equivalent physical property observation calculation, compensation coefficient calculation, composite control command generation and issuing cyclically with a fixed sampling period during system operation to achieve continuous dynamic adaptive adjustment.

Description

Material flow self-adaptive control system in seasoning continuous proportioning process Technical Field The invention belongs to the technical field of seasoning proportioning control, and particularly relates to a material flow self-adaptive control system in a seasoning continuous proportioning process. Background In the continuous seasoning production of the food industry, in particular to an accurate mixing link of sauce and powdery additive, maintaining constant material mass ratio is a core requirement for ensuring the consistency of the flavor and stable quality of the product. Currently, automatic control systems for such production lines typically rely on independent monitoring and closed loop adjustment of the individual component material flows, i.e., real-time feedback via flow sensors and comparison to set target values to drive a pump or feed mechanism to correct the deviation. However, this direct flow feedback based control mode control logic defaults to physical properties of the materials, particularly the rheological properties of the continuous phase materials (e.g., ketchup, mayonnaise, etc.) as the mixing bodies, to be stable and constant. In practice, because of factors such as batch differences of raw materials, fluctuation of production environment temperature, or shear heat generation in the conveying process, rheological parameters such as viscosity of the main materials often have unpredictable natural changes. Such variations can directly affect their delivery conditions, the mixing dynamics with the solid additives, and the measurement characteristics of the in-line flow meter, resulting in effective mixing ratios that can be ultimately achieved that deviate from process expectations even if the instantaneous flow rates of the components meet set points. Accordingly, the following scheme is proposed for the above problems. Disclosure of Invention The invention aims to provide a material flow self-adaptive control system in a seasoning continuous proportioning process, which senses the rheological state of a main material on line through coupling analysis of pipeline pressure difference and pumping power signals, and dynamically feedforward compensates proportioning setting of auxiliary materials according to the rheological state, so that compound control is formed, the influence of natural fluctuation of the characteristics of the main material on mixing uniformity can be counteracted in a relatively effective self-adaptive manner under the condition of not depending on a special rheometer, and the problem that the actual proportioning deviates from a set value due to the fact that the state change of the main material cannot be identified in the existing control method is solved. In order to solve the technical problems, the invention is realized by the following technical scheme: the invention relates to a material flow self-adaptive control system in a seasoning continuous proportioning process, which comprises the following components: the main conveying unit is used for continuously conveying the liquid basic seasoning and comprises a conveying pump, a pressure detection unit and a flow detection unit, wherein the pressure detection unit and the flow detection unit are arranged on a pump outlet pipeline; the auxiliary material feeding units are connected with the output pipeline of the main conveying unit in a converging way and are used for continuously adding solid seasoning auxiliary materials into the liquid basic seasoning, and each auxiliary material feeding unit comprises a precise feeding device and an auxiliary material flow detection device arranged at a discharge hole of the auxiliary material feeding unit; The temperature detection unit is used for detecting the temperature of the liquid basic seasoning in real time; The controller is respectively connected with the main conveying unit, the auxiliary material feeding unit, the pressure detection unit, the flow detection unit, the auxiliary material flow detection device and the temperature detection unit in a signal manner; The controller is configured to calculate and set initial theoretical flow of each material according to a preset production formula, synchronously collect operation data from the pressure detection unit, the flow detection unit, the temperature detection unit and each auxiliary material flow detection device in real time, calculate an equivalent physical characteristic observation value reflecting the current rheological characteristic of the liquid basic seasoning based on the collected liquid basic seasoning pipeline pressure data, pump operation parameters, flow data and pipeline geometric parameters, dynamically calculate a compensation coefficient for correcting the target flow of the solid seasoning auxiliary material according to the equivalent physical characteristic observation value and the flow data collected in real time, generate a composite control instruction according to t