An automatic feeding control system for raw materials used in the production of carbonless copy paper

Abstract

The present invention relates to the field of automation control technology, and specifically discloses an automatic feeding control system for raw materials used in carbonless copy paper production, which includes a control parameter acquisition module, a raw material feeding rate control analysis module, a raw material feeding rate automatic control module, a raw material feeding viscosity control analysis module, a product coating state control analysis module, a feeding parameter control terminal, and a database. By accurately obtaining data such as the remaining volume of raw materials and the feeding flow rate, enterprises can clearly understand the reserve and consumption status of raw materials at each production period and time point. Calculating the flow standard deviation and average flow rate and taking into account the coefficient can accurately reflect the stability and volatility of the feeding flow rate, providing a basis for predicting transportation anomalies in advance. And based on this coefficient, enterprises can adjust the raw material feeding rate in real time and flexibly, avoiding production stagnation caused by insufficient feeding or waste of raw materials and inventory backlog caused by excessive feeding, greatly improving the utilization efficiency of raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic control, and specifically refers to an automatic feeding control system for raw materials used in the production of carbonless copy paper. Background Art

[0002] Carbonless copy paper is widely used in modern office and commercial fields, and its production process has extremely high requirements for the accuracy and stability of raw material feeding control. In traditional carbonless copy paper production, raw material feeding mostly relies on manual experience operation or simple automatic control, and there are problems such as it being difficult to accurately master the liquid level change in the raw material storage container, resulting in insufficient or excessive raw material supply; the control of the raw material conveying flow rate is not precise enough, and it is easily interfered by factors such as pipeline pressure and raw material viscosity, affecting the accuracy of batching; and when facing environmental temperature changes, it is unable to timely adjust the raw material feeding parameters to adapt to the change of raw material viscosity, thereby affecting the consistency of coating quality.

[0003] Although some existing automatic feeding control systems have achieved automation to a certain extent, there are still obvious defects. Some systems can only monitor and control a single parameter, such as only focusing on the liquid level or flow rate, and cannot comprehensively consider multiple key factors in the raw material feeding process. In terms of raw material viscosity control, there is a lack of in-depth analysis and precise regulation of the relationship between environmental temperature and raw material viscosity, and it is unable to dynamically adjust the parameters of the conveying equipment according to real-time temperature changes, resulting in unstable raw material conveying under different environmental conditions, affecting production continuity and product quality uniformity. For the monitoring and control of the product coating state, most systems lack an effective closed-loop feedback mechanism, and cannot timely and accurately adjust the raw material feeding amount according to the real-time change of the coating thickness, easily resulting in too large a deviation in the coating thickness, and it is difficult to quickly trace the root cause of abnormal situations during the production process, which is not conducive to timely solving problems and optimizing the production process.

[0004] Therefore, we propose an automatic feeding control system for raw materials used in the production of carbonless copy paper. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an automatic feeding control system for raw materials used in the production of carbonless copy paper to solve the above-mentioned technical defects.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: An automatic feeding control system for raw materials used in the production of carbonless copy paper, comprising: a raw material feeding rate control analysis module, a raw material feeding rate automatic control module, a raw material feeding viscosity control analysis module, a product coating state control analysis module, and a feeding parameter control terminal.

[0007] The raw material feeding rate control analysis module conducts comprehensive calculation and analysis based on the liquid level parameters and conveying parameters at each production time point in each production period during the carbonless copy paper production process, and obtains the raw material storage conveying ratio coefficient at each production time point in each production period during the carbonless copy paper production process;

[0008] The raw material feeding rate automatic control module conducts calculation and analysis based on the raw material storage conveying ratio coefficient at each production time point in each production period during the carbonless copy paper production process, and regulates the raw material feeding speed at each production time point in each production period during the carbonless copy paper production process;

[0009] The raw material feeding viscosity control analysis module conducts comprehensive calculation and analysis based on the raw material parameters and environmental parameters at each production time point in each production period during the carbonless copy paper production process, and obtains the raw material viscosity correction coefficient at each production time point in each production period during the carbonless copy paper production process;

[0010] The product coating state control analysis module conducts comprehensive calculation and analysis based on the processing parameters at each production time point in each production period during the carbonless copy paper production process, and obtains the raw material feeding quantity control coefficient at each production time point in each production period during the carbonless copy paper production process;

[0011] The feeding parameter control terminal adjusts and controls the production parameters of the conveying equipment at each production time point in each production period during the carbonless copy paper production process based on the control calculation and analysis results in the raw material feeding rate automatic control module, the raw material feeding viscosity control analysis module, and the product coating state control analysis module.

[0012] Furthermore, it also includes: a control parameter acquisition module and a database;

[0013] The control parameter acquisition module conducts real-time monitoring and acquisition based on the control analysis parameters at each production time point in each production period during the carbonless copy paper production process, and obtains the control analysis parameters at each production time point in each production period during the carbonless copy paper production process;

[0014] Among them, the control analysis parameters at each production time point in each production period during the carbonless copy paper production process include liquid level parameters, conveying parameters, raw material parameters, environmental parameters, and processing parameters;

[0015] The database is used to store all parameter information collected and analyzed by the automatic raw material feeding control system during the carbonless copy paper production process.

[0016] Further, obtain the real-time remaining liquid level of the raw materials at each production time point in each production period during the production process of carbonless copy paper, denoted as L. At the same time, obtain the cross-sectional area corresponding to each height in the raw material storage container, denoted as S(h). Through the formula Calculate the remaining volume of raw materials RVij at each production time point in each production period during the production process of carbonless copy paper, where i represents the number of each production period, i = 1, 2, ……, n, n represents the total number of production period numbers, j represents the number of each production time point, j = 1, 2, ……, m, and m represents the total number of production time point numbers;

[0017] Obtain the raw material feeding flow rate UQij at each production time point in each production period during the production process of carbonless copy paper from the conveying parameters at each production time point in each production period during the production process of carbonless copy paper. Collect the raw material feeding flow rate data from production time point t1 to t2 at each production time point in each production period during the production process of carbonless copy paper, denoted as Q(t). Through the formula Calculate the actual raw material feeding flow rate SQij during the time period from t1 to t2 during the production process of carbonless copy paper. At the same time, sum up the raw material feeding flow rate data from production time point t1 to t2 during the production process of carbonless copy paper and divide it by the number of data collection time points to obtain the average raw material feeding flow rate during the production time points from t1 to t2 during the production process of carbonless copy paper, denoted as , and at the same time calculate the standard deviation of the raw material feeding flow rate from production time point t1 to t2 during the production process of carbonless copy paper according to the standard deviation calculation formula to obtain the standard deviation of the raw material feeding flow rate from production time point t1 to t2 during the production process of carbonless copy paper, denoted as ;

[0018] Comprehensively analyze the remaining volume of raw materials and the actual raw material feeding flow rate during the time period from t1 to t2 during the production process of carbonless copy paper, as well as the standard deviation and average raw material feeding flow rate of the raw material feeding flow rate from production time point t1 to t2 during the production process of carbonless copy paper, to obtain the raw material storage and transportation ratio coefficient at each production time point in each production period during the production process of carbonless copy paper. The specific analysis method is as follows:

[0019] Based on the above parameters, according to the formula Calculate the raw material storage and transportation ratio coefficient RSij at each production time point in each production period during the production process of carbonless copy paper.

[0020] Further, compare the raw material storage transfer ratio coefficients corresponding to each production time point in each production period during the production process of carbonless copy paper with the set threshold values of the raw material storage transfer ratio coefficients, and simultaneously adjust the raw material feeding speed at each production time point in each production period during the production process of carbonless copy paper according to the comparison results;

[0021] Denote the two threshold values of the raw material storage transfer ratio coefficients as K1 and K2 respectively. Specifically, take the value of K1 as 0.2 and the value of K2 as 0.8;

[0022] If RSij ≤ K1, it means that the raw material feeding flow rate per unit time during the production process of carbonless copy paper is small relative to the remaining raw material storage. At this time, adjust the rotation speed of the conveying equipment during the production process of carbonless copy paper to N1, and calculate the adjusted rotation speed N1 of the conveying equipment during the production process of carbonless copy paper through the formula where N represents the rotation speed of the conveying equipment before adjustment during the production process of carbonless copy paper;

[0023] If K1 < RSij < K2, it means that the raw material feeding flow rate and the remaining raw material storage are in a relatively balanced state per unit time during the production process of carbonless copy paper. At this time, do not adjust the rotation speed of the conveying equipment during the production process of carbonless copy paper;

[0024] If RSij ≥ K2, it means that the raw material feeding flow rate per unit time during the production process of carbonless copy paper is large relative to the remaining raw material storage. At this time, adjust the rotation speed of the conveying equipment during the production process of carbonless copy paper to N2, and calculate the adjusted rotation speed N2 of the conveying equipment during the production process of carbonless copy paper through the formula Calculate the adjusted rotation speed N2 of the conveying equipment during the production process of carbonless copy paper.

[0025] Further, obtain the raw material viscosity data NDij at each production time point in each production period during the production process of carbonless copy paper from the raw material parameters at each production time point in each production period during the production process of carbonless copy paper;

[0026] Obtain the ambient temperature HTij at each production time point in each production period during the production process of carbonless copy paper from the ambient parameters at each production time point in each production period during the production process of carbonless copy paper;

[0027] Calculate the theoretical raw material viscosity at each production time point in each production period during the production process of carbonless copy paper through the formula Calculate the theoretical raw material viscosity at each production time point in each production period during the production process of carbonless copy paper , where A represents the pre-exponential factor corresponding to the feeding raw material, Ea represents the activation energy corresponding to the feeding raw material, R represents the ideal gas constant, and e represents the natural constant. By conducting viscosity tests on the feeding raw material at different temperatures in the laboratory and then fitting the test data into the Arrhenius equation through the method of non-linear regression, the values of A and Ea are obtained.

[0028] Furthermore, based on historical production data, the measurement error of the raw material viscosity data at each production time point in each production period during the production process of carbonless copy paper is artificially set as , and through comprehensive calculation and analysis of the above parameters, the raw material viscosity correction coefficient at each production time point in each production period during the production process of carbonless copy paper is obtained. The specific calculation and analysis method is as follows:

[0029] According to the formula , the minimum value of the raw material viscosity correction coefficient and the maximum value of the raw material viscosity correction coefficient at each production time point in each production period during the production process of carbonless copy paper are respectively calculated.

[0030] Furthermore, when ≤1 and ≤1, it indicates that the actual viscosity of the feeding raw material is lower than the theoretical viscosity. At this time, the rotational speed of the conveying equipment is adjusted to N3, and the adjusted rotational speed of the conveying equipment is calculated through the formula .

[0031] When ≥1 and ≥1, it indicates that the actual viscosity of the feeding raw material is higher than the theoretical viscosity. At this time, the pressure of the conveying equipment is adjusted to P1, and the adjusted pressure of the conveying equipment is calculated through the formula , where P represents the pressure of the conveying equipment before adjustment.

[0032] When ≤1 and ≥1, it indicates that the actual viscosity state of the feeding raw material is uncertain. At this time, the minimum value and the maximum value of the raw material viscosity correction coefficient are summed and then the average value is calculated. Based on the average value of the raw material viscosity correction coefficient, the rotational speed and pressure of the conveying equipment are adjusted accordingly according to the above rotational speed adjustment calculation formula and pressure adjustment calculation formula of the conveying equipment.

[0033] Further, determine the target coating thickness at each production time point in each production period during the production process of carbonless copy paper according to the requirements of the product production process. At the same time, obtain the coating thickness at each production time point in each production period during the production process of carbonless copy paper from the processing parameters at each production time point in each production period during the production process of carbonless copy paper. By calculating the difference between the coating thickness at each production time point in each production period during the production process of carbonless copy paper and the target coating thickness at each production time point in each production period during the production process of carbonless copy paper, obtain the coating thickness deviation at each production time point in each production period during the production process of carbonless copy paper.

[0034] Further, obtain the processing rate at each production time point in each production period during the production process of carbonless copy paper from the processing parameters at each production time point in each production period during the production process of carbonless copy paper. By calculating the ratio of the coating thickness deviation at each production time point in each production period during the production process of carbonless copy paper to the processing rate, obtain the coating thickness adjustment amount at each production time point in each production period during the production process of carbonless copy paper.

[0035] Further, calculate the ratio of the coating thickness adjustment amount at each production time point in each production period during the production process of carbonless copy paper to the target coating thickness at each production time point in each production period during the production process of carbonless copy paper to obtain the raw material feeding amount control coefficient at each production time point in each production period during the production process of carbonless copy paper, denoted as CTij;

[0036] If CTij > 0, it means that the coating thickness at this production time point in this production period during the production process of carbonless copy paper is thin, generate a signal to increase the feeding amount, and control the rotation speed of the conveying equipment for raw material feeding to increase; otherwise, it means that the coating thickness at this production time point in this production period during the production process of carbonless copy paper is thick, generate a signal to decrease the feeding amount, and control the rotation speed of the conveying equipment for raw material feeding to decrease.

[0037] The beneficial effects of the present invention:

[0038] 1. By accurately obtaining data such as the remaining volume of raw materials and the feeding flow rate, the present invention enables enterprises to clearly understand the reserve and consumption status of raw materials at each production period and time point. By calculating the flow standard deviation and average flow rate and taking into account coefficients, it can accurately reflect the stability and volatility of the feeding flow rate, providing a basis for predicting transportation anomalies in advance. Based on this coefficient, enterprises can adjust the raw material feeding rate in real time and flexibly, avoiding production stagnation caused by insufficient feeding or raw material waste and inventory backlog caused by excessive feeding, greatly improving the utilization efficiency of raw materials. At the same time, stable raw material supply helps to ensure the continuity and stability of the carbonless copy paper production process, reduce product quality problems caused by fluctuations in raw material supply, improve the consistency and reliability of product quality, thereby enhancing the competitiveness and economic benefits of enterprises in the carbonless copy paper market, and also providing key data support and decision-making basis for the optimization of production processes and refined management.

[0039] 2. In the present invention, the raw material feeding rate automatic control module adjusts the raw material feeding speed based on the calculation and analysis of the raw material reserve transportation ratio coefficient. By scientifically setting the threshold value of the raw material reserve transportation ratio coefficient according to various factors, it can accurately define different states in the carbonless copy paper production process. When the coefficient is less than the lower threshold K1, the rotation speed of the transportation equipment is automatically reduced, which can avoid energy waste and equipment idling wear caused by too small feeding flow rate, and at the same time ensure the rationality and economy of raw material supply during low-demand periods. When the coefficient is between K1 and K2, the rotation speed of the transportation equipment remains unchanged, which helps to maintain the stable operation of production, reduce unnecessary equipment adjustments, improve the continuity and stability of the production process, and ensure the consistency of product quality. Once the coefficient is greater than the upper threshold K2, the rotation speed of the transportation equipment is automatically reduced, effectively preventing raw materials from being quickly exhausted, production interruption or quality problems caused by raw material backlog due to too large feeding flow rate, realizing the efficient utilization and precise control of raw materials. This intelligent control method greatly improves the adaptability and reliability of the production system, reduces the uncertainty brought by manual intervention, improves the overall production efficiency, reduces production costs, and brings better economic benefits and stronger market competitiveness to carbonless copy paper production enterprises.

[0040] 3. In the present invention, by precisely collecting raw material parameters and environmental parameters, deeply calculating the theoretical raw material viscosity according to the Arrhenius equation, and combining with the measurement error set by humans to obtain the range of the raw material viscosity correction coefficient, the precise quantitative evaluation of the change in raw material viscosity is realized. When the actual viscosity is lower than the theoretical viscosity, the rotation speed of the conveying equipment is automatically increased according to the calculation, which can ensure that the raw materials can be efficiently and stably conveyed under low-viscosity conditions, avoiding poor conveyance or proportion imbalance caused by viscosity reduction, and ensuring the continuity of production and the stability of product quality. If the actual viscosity is higher than the theoretical viscosity, the pressure of the conveying equipment is adjusted accordingly, which can effectively overcome the flow resistance caused by high viscosity, maintain the stable supply of raw materials, and prevent conveyance interruption or equipment overload failure caused by viscosity increase. When the viscosity state is uncertain, the average value of the correction coefficient is comprehensively considered for speed and pressure adjustment, which reflects the flexibility and adaptability of the solution, and can minimize the adverse impact of viscosity fluctuations on the production process to the greatest extent. Generally speaking, this solution can intelligently control the conveying equipment according to viscosity changes, optimize the raw material feeding process, improve production efficiency, reduce equipment wear and energy consumption, improve the consistency and reliability of the quality of carbonless copy paper products, and enhance the competitiveness and sustainable development ability of the enterprise in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described below with reference to the drawings.

[0042] Figure 1 It is a principle block diagram of an automatic feeding control system for raw materials used in the production of carbonless copy paper according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall also fall within the protection scope of the present invention.

[0044] As shown in the present invention and the claims, unless the context clearly indicates an exception, the words "a", "an", "one" and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

[0045] Although the present invention makes various references to certain modules in the system according to the embodiments of the present invention, however, any number of different modules can be used and run on the user terminal and / or the server. The modules are only illustrative, and different aspects of the system and method can use different modules.

[0046] In the present invention, flowcharts are used to illustrate the operations performed by the system according to the embodiments of the present invention. It should be understood that the operations before or below do not necessarily need to be executed precisely in sequence. Instead, as needed, various steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or more steps can be removed from these processes.

[0047] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments of the present invention. It should be understood that the present invention is not limited by the exemplary embodiments described herein.

[0048] Embodiment 1: Please refer to Figure 1 As shown, an automatic feeding control system for raw materials used in carbonless copy paper production includes: a control parameter acquisition module, a raw material feeding rate control analysis module, a raw material feeding rate automatic control module, a raw material feeding viscosity control analysis module, a product coating state control analysis module, a feeding parameter control terminal, and a database.

[0049] The control parameter acquisition module performs real-time monitoring and acquisition based on the control analysis parameters corresponding to each production time point in each production period during the carbonless copy paper production process, and obtains the control analysis parameters corresponding to each production time point in each production period during the carbonless copy paper production process;

[0050] Among them, the control analysis parameters corresponding to each production time point in each production period during the carbonless copy paper production process include liquid level parameters, conveying parameters, raw material parameters, environmental parameters, and processing parameters.

[0051] By setting an ultrasonic liquid level sensor inside the raw material storage container, emitting ultrasonic pulses to the liquid surface, and then receiving the ultrasonic signals reflected by the liquid surface, the liquid level height is calculated based on the propagation speed and round-trip time of ultrasonic waves in the air, and the real-time remaining liquid level of the raw material corresponding to each production time point in each production period during the carbonless copy paper production process is obtained, which is recorded as the liquid level parameter corresponding to each production time point in each production period during the carbonless copy paper production process;

[0052] The induced electromotive force is measured by an electromagnetic flow sensor, and the flow rate of the raw material inside the feeding pipeline is calculated according to Faraday's law of electromagnetic induction, and the raw material feeding flow rate corresponding to each production time point in each production period during the carbonless copy paper production process is obtained, which is recorded as the conveying parameter corresponding to each production time point in each production period during the carbonless copy paper production process;

[0053] The cross-sectional areas corresponding to each height in the raw material storage container are calculated through the area calculation formula;

[0054] The viscosity of the feeding raw materials at each production time point in each production period during the production process of carbonless copy paper is measured by a rotary viscosity sensor, and the raw material viscosity at each production time point in each production period during the production process of carbonless copy paper is obtained, which is recorded as the raw material parameter at each production time point in each production period during the production process of carbonless copy paper;

[0055] The ambient temperature at each production time point in each production period during the production process of carbonless copy paper is monitored in real time by a thermal resistance temperature sensor, and the ambient temperature at each production time point in each production period during the production process of carbonless copy paper is obtained, which is recorded as the ambient parameter at each production time point in each production period during the production process of carbonless copy paper;

[0056] The coating thickness at each production time point in each production period during the production process of carbonless copy paper is measured in real time by an ultrasonic thickness gauge sensor, and the coating thickness at each production time point in each production period during the production process of carbonless copy paper is obtained. At the same time, the number of times of object occlusion at each production time point in each production period during the production process of carbonless copy paper is monitored in real time by a photoelectric sensor installed on the production line, so as to obtain the production rate at each production time point in each production period during the production process of carbonless copy paper. The coating thickness and production rate at each production time point in each production period during the production process of carbonless copy paper are recorded as the processing parameters at each production time point in each production period during the production process of carbonless copy paper.

[0057] In a specific embodiment, through the comprehensive and accurate real-time monitoring and acquisition of liquid level parameters, conveying parameters, raw material parameters, environmental parameters and processing parameters by the control parameter acquisition module in the present invention, a detailed data basis can be provided for the entire production process. The ultrasonic liquid level sensor is used to accurately calculate the real-time remaining liquid level of the raw materials, the electromagnetic flow sensor is used to accurately obtain the feeding flow rate of the raw materials, the rotary viscosity sensor and the thermal resistance temperature sensor are used to respectively master the raw material viscosity and the environmental temperature, and the ultrasonic thickness gauge sensor and the photoelectric sensor are used to monitor the coating thickness and the production rate. The accurate acquisition of these data helps to achieve refined production management.

[0058] Based on the liquid level parameters and conveying parameters at each production time point in each production period during the production process of carbonless copy paper, the raw material storage conveying ratio coefficient at each production time point in each production period during the production process of carbonless copy paper is obtained through comprehensive calculation and analysis by the raw material feeding rate control analysis module. The specific calculation and analysis method is as follows:

[0059] Obtain the real-time remaining liquid level of the raw materials at each production time point in each production period during the carbonless copy paper production process, denoted as L. At the same time, obtain the cross-sectional area corresponding to each height in the raw material storage container, denoted as S(h). Through the formula Calculate the remaining volume of raw materials RVij at each production time point in each production period during the carbonless copy paper production process, where i represents the number of each production period, i = 1, 2, ……, n, n represents the total number of production period numbers, j represents the number of each production time point, j = 1, 2, ……, m, and m represents the total number of production time point numbers;

[0060] Obtain the raw material feeding flow rate UQij at each production time point in each production period during the carbonless copy paper production process from the conveying parameters at each production time point in each production period during the carbonless copy paper production process. Collect the raw material feeding flow rate data from production time point t1 to t2 at each production time point in each production period during the carbonless copy paper production process, denoted as Q(t). Through the formula Calculate the actual raw material feeding flow rate SQij during the time period from t1 to t2 during the carbonless copy paper production process. At the same time, sum up the raw material feeding flow rate data from production time point t1 to t2 during the carbonless copy paper production process and divide it by the number of data collection time points to obtain the average raw material feeding flow rate during the production time points from t1 to t2 during the carbonless copy paper production process, denoted as , and at the same time calculate the standard deviation of the raw material feeding flow rate from production time point t1 to t2 during the carbonless copy paper production process according to the standard deviation calculation formula to obtain the standard deviation of the raw material feeding flow rate from production time point t1 to t2 during the carbonless copy paper production process, denoted as ;

[0061] Comprehensively analyze the remaining volume of raw materials and the actual raw material feeding flow rate during the time period from t1 to t2 during the carbonless copy paper production process, as well as the standard deviation and average raw material feeding flow rate of the raw material feeding flow rate from production time point t1 to t2 during the carbonless copy paper production process, to obtain the raw material storage and transportation ratio coefficient at each production time point in each production period during the carbonless copy paper production process. The specific analysis method is as follows:

[0062] Based on the above parameters, according to the formula Calculate the raw material storage and transportation ratio coefficient RSij at each production time point in each production period during the carbonless copy paper production process.

[0063] In a specific embodiment, by accurately obtaining data such as the remaining volume of raw materials and the feeding flow rate, the present invention enables enterprises to clearly understand the reserve and consumption status of raw materials at each production period and time point. By calculating the flow standard deviation and average flow rate and taking into account coefficients, it can accurately reflect the stability and volatility of the feeding flow rate, providing a basis for predicting transportation anomalies in advance. Based on this coefficient, enterprises can adjust the raw material feeding rate in real time and flexibly, avoiding production stagnation caused by insufficient feeding or raw material waste and inventory backlog caused by excessive feeding, greatly improving the utilization efficiency of raw materials. At the same time, stable raw material supply helps to ensure the continuity and stability of the carbonless copy paper production process, reduce product quality problems caused by raw material supply fluctuations, improve the consistency and reliability of product quality, and thus enhance the competitiveness and economic benefits of enterprises in the carbonless copy paper market. It also provides key data support and decision-making basis for the optimization of production processes and refined management.

[0064] The automatic control module for raw material feeding rate calculates and analyzes based on the raw material reserve transportation ratio coefficient corresponding to each production time point in each production period during the carbonless copy paper production process, and adjusts the raw material feeding speed corresponding to each production time point in each production period during the carbonless copy paper production process. The specific calculation and analysis method is as follows:

[0065] Compare the raw material reserve transportation ratio coefficient corresponding to each production time point in each production period during the carbonless copy paper production process with the set threshold of the raw material reserve transportation ratio coefficient, and at the same time adjust the raw material feeding speed corresponding to each production time point in each production period during the carbonless copy paper production process according to the comparison result;

[0066] It should be noted that the setting of the threshold of the raw material reserve transportation ratio coefficient is based on historical production experience, production actual situation, production equipment performance and the characteristics of production raw materials on the one hand, and is tested and optimized through experiments and simulations on the other hand. Finally, two thresholds of the raw material reserve transportation ratio coefficient corresponding to the carbonless copy paper production process are determined. When the value of the raw material reserve transportation ratio coefficient falls between these two thresholds of the raw material reserve transportation ratio coefficient, it indicates that the production of carbonless copy paper is in a stable operation state.

[0067] Denote the two thresholds of the raw material reserve transportation ratio coefficient as K1 and K2 respectively. Specifically, K1 is taken as 0.2 and K2 is taken as 0.8;

[0068] If RSij ≤ K1, it means that the raw material feeding flow rate per unit time during the carbonless copy paper production process is small relative to the remaining raw material reserves. At this time, adjust the rotation speed of the transportation equipment during the carbonless copy paper production process to N1, and calculate the adjusted rotation speed N1 of the transportation equipment during the carbonless copy paper production process through the formula where N represents the rotation speed of the transportation equipment before adjustment during the carbonless copy paper production process;

[0069] If K1 < RSij < K2, it indicates that the raw material feeding flow rate and the remaining raw material storage in the unit time during the production process of carbonless copy paper are in a relatively balanced state. At this time, the rotation speed of the conveying equipment in the carbonless copy paper production process is not adjusted;

[0070] If RSij ≥ K2, it means that the raw material feeding flow rate per unit time during the production process of carbonless copy paper is larger than the remaining raw material storage. At this time, the rotation speed of the conveying equipment in the carbonless copy paper production process is adjusted to N2, and through the formula Calculate the adjusted rotation speed N2 of the conveying equipment in the carbonless copy paper production process.

[0071] In a specific embodiment, in the present invention, the raw material feeding rate automatic control module adjusts the raw material feeding speed based on the calculation and analysis of the raw material storage conveying ratio coefficient, and scientifically sets the threshold value of the raw material storage conveying ratio coefficient according to various factors, which can accurately define different states in the carbonless copy paper production process. When the coefficient is less than the lower threshold K1, the rotation speed of the conveying equipment is automatically reduced, which can avoid energy waste and equipment idling wear caused by too small feeding flow rate, and at the same time ensure the rationality and economy of raw material supply during low-demand periods. When the coefficient is between K1 and K2, the rotation speed of the conveying equipment remains unchanged, which helps to maintain the stable operation of production, reduce unnecessary equipment adjustments, improve the continuity and stability of the production process, ensure the consistency of product quality. Once the coefficient is greater than the upper threshold K2, the rotation speed of the conveying equipment is automatically reduced, effectively preventing quality problems caused by rapid depletion of raw materials, production interruption or raw material backlog due to too large feeding flow rate, realizing the efficient utilization and precise control of raw materials. This intelligent control method greatly improves the adaptability and reliability of the production system, reduces the uncertainty brought by manual intervention, improves the overall production efficiency, reduces production costs, and brings better economic benefits and stronger market competitiveness to carbonless copy paper production enterprises.

[0072] The raw material feeding viscosity control analysis module performs comprehensive calculation and analysis based on the raw material parameters and environmental parameters at each production time point in each production period during the carbonless copy paper production process, and obtains the raw material viscosity correction coefficient at each production time point in each production period during the carbonless copy paper production process. The specific calculation and analysis method is as follows:

[0073] Obtain the raw material viscosity data NDij at each production time point in each production period during the carbonless copy paper production process from the raw material parameters at each production time point in each production period during the carbonless copy paper production process;

[0074] Obtain the environmental temperature at each production time point in each production period during the production process of carbonless copy paper, denoted as HTij, from the environmental parameters corresponding to each production time point in each production period during the production process of carbonless copy paper;

[0075] Through the formula Calculate the theoretical raw material viscosity at each production time point in each production period during the production process of carbonless copy paper , where A represents the pre-exponential factor corresponding to the feeding raw material, Ea represents the activation energy corresponding to the feeding raw material, R represents the ideal gas constant, and e represents the natural constant. The values of A and Ea are obtained by conducting viscosity tests on the feeding raw material at different temperatures in the laboratory and then fitting the test data into the Arrhenius equation through the method of nonlinear regression;

[0076] Then, according to the historical production data, artificially set the measurement error of the raw material viscosity data at each production time point in each production period during the production process of carbonless copy paper as , and conduct calculation and analysis by integrating the above parameters to obtain the raw material viscosity correction coefficient at each production time point in each production period during the production process of carbonless copy paper. The specific calculation and analysis method is as follows:

[0077] According to the formula Calculate the minimum value of the raw material viscosity correction coefficient and the maximum value of the raw material viscosity correction coefficient at each production time point in each production period during the production process of carbonless copy paper respectively;

[0078] When ≤1 and ≤1, it means that the actual viscosity of the feeding raw material is lower than the theoretical viscosity. At this time, adjust the rotation speed of the conveying equipment to N3, and calculate the adjusted rotation speed of the conveying equipment through the formula ;

[0079] When ≥1 and ≥1, it means that the actual viscosity of the feeding raw material is higher than the theoretical viscosity. At this time, adjust the pressure of the conveying equipment to P1, and calculate the adjusted pressure of the conveying equipment through the formula , where P represents the pressure before adjustment of the conveying equipment;

[0080] When ≤1 and ≥1, it means that the actual viscosity state of the feeding raw material is uncertain. At this time, sum up the minimum value of the raw material viscosity correction coefficient and the maximum value of the raw material viscosity correction coefficient and calculate the average value. According to the average value of the raw material viscosity correction coefficient, adjust the rotation speed and pressure of the conveying equipment accordingly according to the above rotation speed adjustment calculation formula and pressure adjustment calculation formula of the conveying equipment.

[0081] In a specific embodiment, in the present invention, by accurately collecting raw material parameters and environmental parameters, deeply calculating the theoretical raw material viscosity according to the Arrhenius equation, and combining with the measurement error set by humans to obtain the range of the raw material viscosity correction coefficient, the accurate quantitative evaluation of the change in raw material viscosity is realized. When the actual viscosity is lower than the theoretical viscosity, the rotation speed of the conveying equipment is automatically increased according to the calculation, which can ensure that the raw materials can be efficiently and stably conveyed under low viscosity conditions, avoid poor conveyance or proportion imbalance caused by the viscosity reduction, and ensure the continuity of production and the stability of product quality. If the actual viscosity is higher than the theoretical viscosity, the pressure of the conveying equipment is adjusted accordingly, which can effectively overcome the flow resistance brought by the high viscosity, maintain the stable supply of raw materials, and prevent the conveying interruption or equipment overload failure caused by the viscosity increase. When the viscosity state is uncertain, the average value of the correction coefficient is comprehensively considered for the adjustment of the rotation speed and pressure, which reflects the flexibility and adaptability of the solution, and can minimize the adverse impact on the production process caused by viscosity fluctuations. Generally speaking, this solution can intelligently control the conveying equipment according to the viscosity change, optimize the raw material feeding process, improve the production efficiency, reduce the equipment loss and energy consumption, improve the consistency and reliability of the carbonless copy paper product quality, and enhance the competitiveness and sustainable development ability of the enterprise in the industry.

[0082] The product coating state control analysis module performs comprehensive calculation and analysis based on the processing parameters corresponding to each production time point in each production period during the carbonless copy paper production process, and obtains the raw material feeding amount control coefficient corresponding to each production time point in each production period during the carbonless copy paper production process. The specific calculation and analysis method is as follows:

[0083] First, determine the target coating thickness corresponding to each production time point in each production period during the carbonless copy paper production process according to the product production process requirements, and at the same time obtain the coating thickness corresponding to each production time point in each production period during the carbonless copy paper production process from the processing parameters corresponding to each production time point in each production period during the carbonless copy paper production process. By performing a difference calculation on the coating thickness corresponding to each production time point in each production period during the carbonless copy paper production process and the target coating thickness corresponding to each production time point in each production period during the carbonless copy paper production process, the coating thickness deviation corresponding to each production time point in each production period during the carbonless copy paper production process is obtained;

[0084] Next, obtain the processing rate corresponding to each production time point in each production period during the carbonless copy paper production process from the processing parameters corresponding to each production time point in each production period during the carbonless copy paper production process. By performing a ratio calculation on the coating thickness deviation corresponding to each production time point in each production period during the carbonless copy paper production process and the processing rate, the coating thickness adjustment amount corresponding to each production time point in each production period during the carbonless copy paper production process is obtained;

[0085] Finally, the adjustment amount of the coating thickness at each production time point in each production period during the production process of carbonless copy paper is compared with the target coating thickness at each production time point in each production period during the production process of carbonless copy paper to calculate the raw material feeding amount control coefficient at each production time point in each production period during the production process of carbonless copy paper, denoted as CTij;

[0086] If CTij > 0, it indicates that the coating thickness at this production time point in this production period during the production process of carbonless copy paper is thin, generates a signal to increase the feeding amount, and controls the conveyor equipment to increase the rotation speed of raw material feeding; conversely, it indicates that the coating thickness at this production time point in this production period during the production process of carbonless copy paper is thick, generates a signal to reduce the feeding amount, and controls the conveyor equipment to reduce the rotation speed of raw material feeding.

[0087] In a specific embodiment, in the present invention, by accurately obtaining the coating thickness and processing rate in the processing parameters and performing detailed calculation and analysis with the target coating thickness, the raw material feeding amount control coefficient is obtained, thereby realizing the intelligent regulation of the raw material feeding amount, being able to monitor the coating thickness deviation in real time, calculating the adjustment amount based on the deviation and the processing rate, and then determining the feeding amount control coefficient. This process enables the production process to quickly and accurately respond to the change of the coating thickness. When the coating thickness is too thin, the raw material feeding amount is automatically increased to ensure that the coating thickness meets the process requirements, guarantee the stability and consistency of the product quality, and avoid product function defects caused by too thin a coating. On the contrary, when the coating thickness is too thick, the raw material feeding amount is timely reduced to prevent raw material waste, extended drying time, or affected product appearance and performance caused by too thick a coating. This automated and precise control method effectively reduces the errors and lags brought by manual intervention, greatly improves the quality control level of the carbonless copy paper production process, improves the product qualification rate, optimizes the production resource allocation, reduces the production cost, enhances the competitiveness and sustainable development ability of the enterprise in the carbonless copy paper market, and provides a solid guarantee for the efficient and stable production of the enterprise.

[0088] The feeding parameter control terminal adjusts and controls the production parameters of the conveyor equipment at each production time point in each production period during the production process of carbonless copy paper based on the control calculation and analysis results in the raw material feeding rate automatic control module, the raw material feeding viscosity control analysis module, and the product coating state control analysis module.

[0089] The database is used to store all parameter information collected and analyzed by the raw material automatic feeding control system during the production process of carbonless copy paper. Based on the parameter information, the abnormal situations during the production process of carbonless copy paper can be traced back to timely find the location of the abnormal problems, thereby ensuring the normal progress of the production of carbonless copy paper.

[0090] The above formulas are all dimensionless and take their numerical values for calculation. The formulas are obtained by collecting a large amount of data and performing software simulations to get a formula that is closest to the actual situation. The magnitude of the coefficient is a specific value obtained by quantifying each parameter. Regarding the magnitude of the coefficient, as long as it does not affect the proportional relationship between the parameters and the quantified values, it is acceptable.

[0091] In addition, those skilled in the art can understand that various aspects of the present invention can be illustrated and described by several patentable types or situations, including any new and useful processes, machines, products, or combinations of substances, or any new and useful improvements thereto. Accordingly, various aspects of the present invention can be executed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above hardware or software can all be referred to as "data blocks", "modules", "engines", "units", "components", or "systems". In addition, various aspects of the present invention may be embodied as a computer product located in one or more computer-readable media, which includes computer-readable program code.

[0092] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. It should also be understood that terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless explicitly defined as such herein.

[0093] The above is an illustration of the present invention and should not be considered a limitation thereof. Although several exemplary embodiments of the present invention have been described, those skilled in the art will readily understand that many modifications can be made to the exemplary embodiments without departing from the novel teachings and advantages of the present invention. Therefore, all such modifications are intended to be included within the scope of the present invention as defined by the claims. It should be understood that the above is an illustration of the present invention and should not be considered limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present invention is defined by the claims and their equivalents.

Claims

1. An automatic feeding control system for raw materials used in the production of carbonless copy paper, characterized in that: include: Raw material feeding rate control and analysis module, raw material feeding rate automatic control module, raw material feeding viscosity control and analysis module, product coating state control and analysis module, feeding parameter control terminal; The raw material feeding rate control and analysis module performs comprehensive calculation and analysis based on the liquid level parameters and conveying parameters at each production time point in each production period in the carbonless copy paper production process, and obtains the raw material storage and conveying ratio coefficient at each production time point in each production period in the carbonless copy paper production process; The raw material feeding rate automatic control module calculates and analyzes the raw material storage and conveying ratio coefficient corresponding to each production time point in each production period in the carbonless copy paper production process, and regulates the raw material feeding speed corresponding to each production time point in each production period in the carbonless copy paper production process; The raw material feeding viscosity control and analysis module performs comprehensive calculation and analysis based on the raw material parameters and environmental parameters corresponding to each production time point in each production period in the carbonless copy paper production process, and obtains the raw material viscosity correction coefficient corresponding to each production time point in each production period in the carbonless copy paper production process; The product coating state control and analysis module performs comprehensive calculation and analysis based on the processing parameters of each production time point in each production period in the carbonless copy paper production process, and obtains the raw material feeding quantity control coefficient corresponding to each production time point in each production period in the carbonless copy paper production process; The feeding parameter control terminal adjusts and controls the production parameters of the conveying equipment at each production time point in each production period during the carbonless copy paper production process based on the control calculation and analysis results in the raw material feeding rate automatic control module, the raw material feeding viscosity control and analysis module, and the product coating state control and analysis module; The real-time remaining liquid level of the raw material at each production time point in each production period in the carbonless copy paper production process is obtained from the liquid level parameters at each production time point in each production period in the carbonless copy paper production process, recorded as L, and the cross-sectional area corresponding to each height in the raw material storage container is obtained, recorded as S(h), and the formula is used to calculate the residual liquid level of the raw material at each production time point in each production period in the carbonless copy paper production process. Calculate the remaining volume RVij of the raw material at each production time point in each production period in the carbonless copy paper production process, where i represents the number of each production period, i=1,2,...,n, n represents the total number of the numbers of each production period, j represents the number of each production time point, j=1,2,...,m, m represents the total number of the numbers of each production time point; The raw material feeding flow rate at each production time point in each production period in the carbonless copy paper production process is obtained from the conveying parameters at each production time point in each production period in the carbonless copy paper production process, which is recorded as UQij. The raw material feeding flow rate data from production time point t1 to t2 is collected from the production time point in each production period in the carbonless copy paper production process, which is recorded as Q(t). The formula Calculate the actual feed flow rate SQij of the raw material corresponding to the time period from t1 to t2 in the carbonless copy paper production process. At the same time, sum the raw material feed flow data corresponding to the production time point from t1 to t2 in the carbonless copy paper production process and divide it by the number of data collection time points to obtain the average feed flow rate of the raw material corresponding to the production time point from t1 to t2 in the carbonless copy paper production process, which is recorded as At the same time, the standard deviation of the raw material feeding flow rate corresponding to the production time point t1 to t2 in the carbonless copy paper production process is calculated according to the standard deviation calculation formula, and the standard deviation of the raw material feeding flow rate corresponding to the production time point t1 to t2 in the carbonless copy paper production process is obtained, which is recorded as ; Comprehensively analyze the remaining volume of raw materials and the actual feed flow rate of raw materials in the time period from t1 to t2 in the carbonless copy paper production process, as well as the standard deviation of the raw material feeding flow rate and the average raw material feeding flow rate from the production time point from t1 to t2 in the carbonless copy paper production process, and obtain the raw material reserve and transportation ratio coefficient at each production time point in each production period in the carbonless copy paper production process. The specific analysis method is as follows: Combining the above parameters, according to the formula Calculate the raw material storage and delivery ratio coefficient RSij corresponding to each production time point in each production period during the carbonless copy paper production process; The raw material storage and delivery ratio coefficient corresponding to each production time point in each production period in the carbonless copy paper production process is compared with the set raw material storage and delivery ratio coefficient threshold, and the raw material feeding speed corresponding to each production time point in each production period in the carbonless copy paper production process is regulated according to the comparison result; The two raw material reserve delivery ratio coefficient thresholds are respectively denoted as K1 and K2. Specifically, K1 is set to 0.2 and K2 is set to 0.

8. If RSij≤K1, it means that the raw material feeding flow rate per unit time in the carbonless copy paper production process is small relative to the remaining raw material reserves. At this time, the speed of the conveying equipment in the carbonless copy paper production process is adjusted to N1. Calculate the adjusted rotation speed N1 of the conveying equipment in the carbonless copy paper production process, where N represents the rotation speed before adjustment of the conveying equipment in the carbonless copy paper production process; If K1<RSij<K2, it means that the raw material feeding flow rate and the remaining raw material reserve per unit time in the carbonless copy paper production process are in a relatively balanced state, and the speed of the conveying equipment in the carbonless copy paper production process is not adjusted at this time; If RSij≥K2, it means that the raw material feeding flow rate per unit time in the carbonless copy paper production process is large relative to the remaining raw material reserves. At this time, the speed of the conveying equipment in the carbonless copy paper production process is adjusted to N2. Calculate the adjusted speed N2 of the conveying equipment in the carbonless copy paper production process; Obtain the raw material viscosity data corresponding to each production time point in each production period in the carbonless copy paper production process from the raw material parameters corresponding to each production time point in each production period in the carbonless copy paper production process, recorded as NDij; Obtain the ambient temperature at each production time point in each production period in the carbonless copy paper production process from the ambient parameters at each production time point in each production period in the carbonless copy paper production process, recorded as HTij; By formula Calculate the theoretical raw material viscosity at each production time point in each production period during the carbonless copy paper production process , where A represents the pre-exponential factor corresponding to the raw material, Ea represents the activation energy corresponding to the raw material, R represents the ideal gas constant, and e represents the natural constant. The viscosity of the raw material is tested at different temperatures in the laboratory, and the test data is fitted to the Arrhenius equation by the nonlinear regression method to obtain the values ​​of A and Ea; According to the historical production data, the measurement error of the raw material viscosity data corresponding to each production time point in each production period in the carbonless copy paper production process is artificially set as , the above parameters are combined for calculation and analysis to obtain the raw material viscosity correction coefficient corresponding to each production time point in each production period during the carbonless copy paper production process. The specific calculation and analysis method is as follows: According to the formula Calculate the minimum value of the raw material viscosity correction coefficient at each production time point in each production period during the carbonless copy paper production process and maximum value of raw material viscosity correction factor ; when ≤1 and ≤1, it means that the actual viscosity of the raw material is lower than the theoretical viscosity. At this time, adjust the speed of the conveying equipment to N3. Calculate the adjusted speed of the conveying equipment; when ≥1 and ≥1, it means that the actual viscosity of the raw material is higher than the theoretical viscosity. At this time, the pressure of the conveying equipment is adjusted to P1. Calculate the adjusted pressure of the conveying device, where P represents the pressure before adjustment of the conveying device; when ≤1 and ≥1, it means that the actual viscosity state of the feeding raw material is uncertain. At this time, the minimum value of the raw material viscosity correction coefficient and the maximum value of the raw material viscosity correction coefficient are summed to calculate the average value. According to the average value of the raw material viscosity correction coefficient and the speed adjustment calculation formula and pressure adjustment calculation formula of the above-mentioned conveying equipment, the speed and pressure of the conveying equipment are adjusted accordingly.

2. The automatic feeding control system for raw materials used in the production of carbonless copy paper according to claim 1, characterized in that: Also includes: Control parameter acquisition module and database; The control parameter acquisition module performs real-time monitoring and acquisition of the control analysis parameters corresponding to each production time point in each production period in the carbonless copy paper production process, and obtains the control analysis parameters corresponding to each production time point in each production period in the carbonless copy paper production process; Among them, the control analysis parameters corresponding to each production time point in each production period during the carbonless copy paper production process include liquid level parameters, conveying parameters, raw material parameters, environmental parameters and processing parameters; The database is used to store all parameter information collected and analyzed by the automatic feeding control system of raw materials in the production process of carbonless copy paper.

3. The automatic feeding control system for raw materials used in the production of carbonless copy paper according to claim 1, characterized in that: According to the product production process requirements, the target coating thickness at each production time point in each production period in the carbonless copy paper production process is determined, and at the same time, the coating thickness at each production time point in each production period in the carbonless copy paper production process is obtained from the processing parameters at each production time point in each production period in the carbonless copy paper production process. By subtracting the coating thickness at each production time point in each production period in the carbonless copy paper production process from the target coating thickness at each production time point in each production period in the carbonless copy paper production process, the coating thickness deviation at each production time point in each production period in the carbonless copy paper production process is obtained.

4. The automatic feeding control system for raw materials used in the production of carbonless copy paper according to claim 3, characterized in that: The processing rate at each production time point in each production period in the carbonless copy paper production process corresponding to the processing parameters of each production time point in each production period in the carbonless copy paper production process is obtained, and the coating thickness adjustment amount at each production time point in each production period in the carbonless copy paper production process corresponding to the coating thickness deviation and the processing rate are compared and calculated.

5. The automatic feeding control system for raw materials used in the production of carbonless copy paper according to claim 4, characterized in that: The coating thickness adjustment amount corresponding to each production time point in each production period in the carbonless copy paper production process and the target coating thickness corresponding to each production time point in each production period in the carbonless copy paper production process are compared and calculated to obtain the raw material feeding amount control coefficient corresponding to each production time point in each production period in the carbonless copy paper production process, which is recorded as CTij; If CTij>0, it means that the coating thickness at the production time point in the production period during the carbonless copy paper production process is thin, and a signal for increasing the feeding amount is generated to control the conveying equipment to increase the speed of feeding the raw materials; otherwise, it means that the coating thickness at the production time point in the production period during the carbonless copy paper production process is thick, and a signal for decreasing the feeding amount is generated to control the conveying equipment to reduce the speed of feeding the raw materials.

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