Automatic raw material feeding control system for carbonless copy paper production

Abstract

The invention relates to the technical field of automatic control, and particularly discloses an automatic raw material feeding control system for carbonless copy paper production. Comprising 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 acquiring data such as the residual volume of the raw material and the feeding flow, an enterprise can clearly master the storage and consumption conditions of the raw material in each production time period and time point, the flow standard deviation and the average flow are calculated and incorporated into coefficients for consideration, the stability and the volatility of the feeding flow can be accurately reflected, a basis is provided for pre-judging abnormal conveying in advance, and the production efficiency is improved. And based on the coefficient, an enterprise can flexibly regulate and control the feeding rate of the raw materials in real time, production stagnation caused by insufficient feeding or raw material waste and stock overstock caused by excessive feeding are avoided, and the utilization efficiency of the raw materials is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of automatic control, in particular 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 requires extremely high accuracy and stability in raw material feeding control. In traditional carbonless copy paper production, raw material feeding mostly relies on manual experience operation or simple automatic control. It is difficult to accurately grasp the changes in the liquid level in the raw material storage container, resulting in insufficient or excessive supply of raw materials; the control of the raw material delivery flow is not accurate enough, and is easily affected by factors such as pipeline pressure and raw material viscosity, affecting the accuracy of the ingredients; and when facing changes in ambient temperature, it is impossible to adjust the raw material feeding parameters in time to adapt to changes in raw material viscosity, which in turn affects the consistency of coating quality;

[0003] Although some existing automatic feeding control systems have achieved automation to a certain extent, they still have obvious defects. Some systems can only monitor and control a single parameter, such as only focusing on liquid level or flow, 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 ambient temperature and raw material viscosity, and the conveying equipment parameters cannot be dynamically adjusted according to real-time temperature changes, resulting in unstable raw material transportation under different environmental conditions, affecting production continuity and product quality uniformity. For the monitoring and control of product coating status, most systems lack an effective closed-loop feedback mechanism and cannot adjust the raw material feeding amount in a timely and accurate manner according to real-time changes in coating thickness. The problem of excessive coating thickness deviation is prone to occur, 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 production processes.

[0004] Therefore, we proposed 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, in order to solve the above-mentioned technical defects.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a raw material automatic feeding control system for carbonless copy paper production, comprising: a raw material feeding rate control and analysis module, a raw material feeding rate automatic control module, a raw material feeding viscosity control and analysis module, a product coating state control and analysis module, and a feeding parameter control terminal;

[0007] 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;

[0008] 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;

[0009] 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;

[0010] 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;

[0011] The feeding parameter control terminal adjusts and controls the production parameters of the conveying equipment corresponding to 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.

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

[0013] 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;

[0014] 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;

[0015] 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.

[0016] Furthermore, 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. 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;

[0017] 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 each 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 ;

[0018] 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:

[0019] Combining the above parameters, according to the formula The raw material storage and delivery ratio coefficient RSij corresponding to each production time point in each production period in the carbonless copy paper production process is calculated.

[0020] Furthermore, 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;

[0021] 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.

[0022] 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;

[0023] 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;

[0024] 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.

[0025] Further, the raw material viscosity data corresponding to each production time point in each production period in the carbonless copy paper production process is obtained from the raw material parameters corresponding to each production time point in each production period in the carbonless copy paper production process, which is recorded as NDij;

[0026] 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;

[0027] 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 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 testing the viscosity of the feeding raw material at different temperatures in the laboratory, and then fitting the test data to the Arrhenius equation through the nonlinear regression method.

[0028] Furthermore, 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 during the carbonless copy paper production process is artificially set to , 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:

[0029] 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 .

[0030] Furthermore, 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;

[0031] 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;

[0032] 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.

[0033] Furthermore, the target coating thickness at each production time point in each production period in the carbonless copy paper production process corresponding to the product production process requirements 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 corresponding to the production time point in each production period is obtained from the processing parameters at each production time point in each production period in the carbonless copy paper production process corresponding to the production time point in each production period, and the coating thickness deviation at each production time point in each production period in the carbonless copy paper production process corresponding to the production time point in each production period is obtained 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.

[0034] Furthermore, the processing rate at each production time point in each production period in the carbonless copy paper production process corresponding to the production time point in each production period is obtained from the processing parameters at each production time point in each production period in the carbonless copy paper production process, 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 production time point in each production period is obtained by comparing the coating thickness deviation and the processing rate at each production time point in each production period in the carbonless copy paper production process.

[0035] Furthermore, 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;

[0036] 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.

[0037] Beneficial effects of the present invention:

[0038] 1. The present invention can enable enterprises to clearly grasp the reserve and consumption status of raw materials in various production periods and time points by accurately acquiring data such as the remaining volume of raw materials and the feeding flow rate, calculate the flow rate standard deviation and the average flow rate and take them into consideration in the coefficient, which can accurately reflect the stability and volatility of the feeding flow rate, and provide a basis for predicting transportation abnormalities in advance. Based on the coefficient, enterprises can adjust the raw material feeding rate in real time and flexibly to avoid production stagnation due to insufficient feeding or waste of raw materials and inventory backlog due to excessive feeding, which greatly improves the utilization efficiency of raw materials. At the same time, a stable supply of raw materials 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, and 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 provides key data support and decision-making basis for the optimization and refined management of production processes.

[0039] 2. In the present invention, the raw material feeding speed is regulated by the raw material feeding rate automatic control module based on the calculation and analysis of the raw material reserve and conveying ratio coefficient. The raw material reserve and conveying ratio coefficient threshold is scientifically set according to various factors, and the different states of the carbonless copy paper production process can be accurately defined. When the coefficient is less than the lower limit of the threshold value K1, the conveying equipment speed is automatically reduced, which can avoid energy waste and equipment idling wear caused by too small feeding flow, and ensure the rationality and economy of raw material supply during low demand periods. When the coefficient is between K1 and K2, the conveying equipment speed is kept unchanged, which helps to maintain stable production operation, 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 limit of the threshold value K2, the conveying equipment speed is automatically reduced, effectively preventing the rapid depletion of raw materials, production interruption or quality problems caused by raw material backlog due to excessive feeding flow, and realizing 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 caused by manual intervention, improves overall production efficiency, reduces production costs, and brings better economic benefits and stronger market competitiveness to carbonless copy paper manufacturers.

[0040] 3. In the present invention, by accurately collecting raw material parameters and environmental parameters, and deeply calculating the theoretical raw material viscosity according to the Arrhenius equation, the range of the raw material viscosity correction coefficient is obtained in combination with the artificially set measurement error, so as to realize the accurate quantitative evaluation of the raw material viscosity change. When the actual viscosity is lower than the theoretical viscosity, the speed of the conveying equipment is automatically increased according to the calculation, so as to ensure that the raw material can be efficiently and stably conveyed under low viscosity conditions, avoid poor conveying or mismatched proportions due to reduced viscosity, and ensure production continuity and product quality stability. 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 a stable supply of raw materials, and prevent conveying interruptions or equipment overload failures caused by increased viscosity. When the viscosity state is uncertain, the speed and pressure are adjusted by comprehensively considering the average value of the correction coefficient, which reflects the flexibility and adaptability of the scheme, and can minimize the adverse effects of viscosity fluctuations on the production process. Overall, the scheme can intelligently control the conveying equipment according to the viscosity change, optimize the raw material feeding process, improve production efficiency, reduce equipment loss and energy consumption, improve the consistency and reliability of carbonless copy paper product quality, and enhance the competitiveness and sustainable development capabilities of enterprises in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] Figure 1 The present invention is a block diagram of a raw material automatic feeding control system for carbonless copy paper production according to an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present invention.

[0044] As shown in the present invention and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, 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 has made various references to certain modules in the system according to an embodiment of the present invention, any number of different modules can be used and run on a user terminal and / or server. The modules are only illustrative, and different aspects of the system and method can use different modules.

[0046] The present invention uses a flow chart to illustrate the operations performed by the system according to an embodiment of the present invention. It should be understood that the preceding or following operations are not necessarily performed precisely in order. On the contrary, various steps may be processed in reverse order or simultaneously as required. At the same time, other operations may also be added to these processes, or one or more operations may be removed from these processes.

[0047] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described here.

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

[0049] 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;

[0050] Among them, the control and 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] An ultrasonic liquid level sensor is arranged inside the raw material storage container, ultrasonic pulses are emitted to the liquid surface, and then ultrasonic signals reflected from the liquid surface are received. The liquid level height is calculated according to the propagation speed of the ultrasonic wave in the air and the round-trip time, so as to obtain the real-time remaining liquid level of the raw material at each production time point in each production period in the production process of carbonless copy paper, which is recorded as the liquid level parameter at each production time point in each production period in the production process of carbonless copy paper;

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

[0053] Calculate the cross-sectional area corresponding to each height in the raw material storage container by using the area calculation formula;

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

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

[0056] An ultrasonic thickness measuring sensor is used to measure the coating thickness at each production time point in each production period in the carbonless copy paper production process in real time to obtain the coating thickness at each production time point in each production period in the carbonless copy paper production process. At the same time, a photoelectric sensor installed on the production line is used to monitor the number of object occlusions at each production time point in each production period in the carbonless copy paper production process in real time to obtain the production rate at each production time point in each production period in the carbonless copy paper production process. The coating thickness and production rate at each production time point in each production period in the carbonless copy paper production process are recorded as processing parameters at each production time point in each production period in the carbonless copy paper production process.

[0057] In a specific embodiment, the present invention can provide a detailed data basis for the entire production process by controlling the parameter acquisition module to comprehensively and accurately monitor and collect the liquid level parameters, conveying parameters, raw material parameters, environmental parameters and processing parameters in real time. The ultrasonic liquid level sensor is used to accurately calculate the real-time remaining liquid level of the raw material, the electromagnetic flow sensor is used to accurately obtain the raw material feeding flow rate, the rotary viscosity sensor and thermistor temperature sensor are used to grasp the raw material viscosity and ambient temperature respectively, and the ultrasonic thickness sensor and the photoelectric sensor are used to monitor the coating thickness and production rate. The accurate acquisition of these data helps to achieve refined production management.

[0058] The raw material feeding rate control and analysis module performs comprehensive calculation and analysis based on the liquid level parameters and conveying parameters corresponding to 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 corresponding to each production time point in each production period in the carbonless copy paper production process. The specific calculation and analysis method is as follows:

[0059] 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;

[0060] 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 each 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 ;

[0061] 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:

[0062] Combining the above parameters, according to the formula The raw material storage and delivery ratio coefficient RSij corresponding to each production time point in each production period in the carbonless copy paper production process is calculated.

[0063] In a specific embodiment, the present invention can enable enterprises to clearly understand the reserves and consumption status of raw materials in various production periods and time points by accurately acquiring data such as the remaining volume of raw materials and the feeding flow rate, calculate the standard deviation of the flow rate and the average flow rate and take them into consideration in the coefficient, which can accurately reflect the stability and volatility of the feeding flow rate, and provide a basis for predicting transportation abnormalities in advance. Moreover, based on the coefficient, enterprises can adjust the feeding rate of raw materials in real time and flexibly to avoid production stagnation due to insufficient feeding or waste of raw materials and inventory backlogs due to excessive feeding, thereby greatly improving the utilization efficiency of raw materials. At the same time, a stable supply of raw materials 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, and 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 provides key data support and decision-making basis for the optimization and refined management of production processes.

[0064] 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 specific calculation and analysis method is as follows:

[0065] 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;

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

[0067] 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.

[0068] 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;

[0069] 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;

[0070] 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.

[0071] In a specific embodiment, the present invention regulates the raw material feeding speed based on the calculation and analysis of the raw material reserve and conveying ratio coefficient by the raw material feeding rate automatic control module, and scientifically sets the raw material reserve and conveying ratio coefficient threshold according to various factors, so as to accurately define different states of the carbonless copy paper production process. When the coefficient is less than the lower limit of the threshold value K1, the conveying equipment speed is automatically reduced, which can avoid energy waste and equipment idling wear caused by too small feeding flow, and ensure the rationality and economy of raw material supply during low demand periods. When the coefficient is between K1 and K2, the conveying equipment speed is kept unchanged, which helps to maintain stable production operation, 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 limit of the threshold value K2, the conveying equipment speed is automatically reduced, effectively preventing the rapid depletion of raw materials, production interruption or quality problems caused by raw material backlog due to excessive feeding flow, and realizing 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 caused by manual intervention, improves overall production efficiency, reduces production costs, and brings better economic benefits and stronger market competitiveness to carbonless copy paper manufacturers.

[0072] 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 specific calculation and analysis method is as follows:

[0073] 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;

[0074] 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;

[0075] 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;

[0076] Then, 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 during 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:

[0077] 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 ;

[0078] 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;

[0079] 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;

[0080] 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.

[0081] In a specific embodiment, the present invention accurately collects raw material parameters and environmental parameters, and deeply calculates the theoretical raw material viscosity according to the Arrhenius equation, and obtains the raw material viscosity correction coefficient range in combination with the artificially set measurement error, thereby realizing an accurate quantitative evaluation of the raw material viscosity change. When the actual viscosity is lower than the theoretical viscosity, the speed of the conveying equipment is automatically increased according to the calculation, which can ensure that the raw material can be efficiently and stably conveyed under low viscosity conditions, avoid poor conveying or mismatched ratios due to reduced viscosity, and ensure production continuity and product quality stability. 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 a stable supply of raw materials, and prevent conveying interruptions or equipment overload failures caused by increased viscosity. When the viscosity state is uncertain, the speed and pressure are adjusted by comprehensively considering the average value of the correction coefficient, which reflects the flexibility and adaptability of the scheme, and can minimize the adverse effects of viscosity fluctuations on the production process. Overall, the scheme can intelligently control the conveying equipment according to viscosity changes, optimize the raw material feeding process, improve production efficiency, reduce equipment loss and energy consumption, improve the consistency and reliability of carbonless copy paper product quality, and enhance the competitiveness and sustainable development capabilities of enterprises in the industry.

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

[0083] Firstly, the target coating thickness at each production time point in each production period in the carbonless copy paper production process is determined according to the product production process requirements, 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, and the coating thickness deviation at each production time point in each production period in the carbonless copy paper production process is obtained 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;

[0084] Next, the processing rate 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, and the coating thickness adjustment amount at each production time point in each production period in the carbonless copy paper production process is obtained by comparing the coating thickness deviation at each production time point in each production period in the carbonless copy paper production process and the processing rate.

[0085] Finally, 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;

[0086] 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.

[0087] In a specific embodiment, the present invention obtains the coating thickness and processing rate in the processing parameters by accurately obtaining the coating thickness and processing rate, and performs detailed calculation and analysis with the target coating thickness to obtain the raw material feeding amount control coefficient, thereby realizing intelligent regulation of the raw material feeding amount, being able to monitor the coating thickness deviation in real time, and calculating the adjustment amount according to the deviation and processing rate, and then determining the feeding amount control coefficient. This process enables the production process to respond quickly and accurately to changes in coating thickness. When the coating thickness is thin, the raw material feeding amount is automatically increased to ensure that the coating thickness meets the process requirements, ensure the stability and consistency of product quality, and avoid product functional defects caused by too thin coating. On the contrary, when the coating thickness is thick, the raw material feeding amount is timely reduced to prevent the waste of raw materials, prolonged drying time, or product appearance and performance being affected due to too thick coating. This automated and precise control method effectively reduces the errors and hysteresis caused 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 capabilities of enterprises in the carbonless copy paper market, and provides a solid guarantee for the efficient and stable production of enterprises.

[0088] The feeding parameter control terminal adjusts and controls the production parameters of the conveying equipment corresponding to 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.

[0089] 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. Based on the parameter information, abnormal situations in the carbonless copy paper production process can be traced and the abnormal problems can be found in time, thereby ensuring the normal production of carbonless copy paper.

[0090] The above formulas are all dimensionless and numerical calculations. The formula is a formula that is obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The size of the coefficient is to quantify each parameter to obtain a specific value. Regarding the size of the coefficient, it is acceptable as long as it does not affect the proportional relationship between the parameter and the quantified value.

[0091] In addition, those skilled in the art will appreciate that various aspects of the present invention may be illustrated and described by a number of patentable categories or situations, including any new and useful process, machine, product or combination of substances, or any new and useful improvements thereto. Accordingly, various aspects of the present invention may be performed 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 may all be referred to as "data blocks", "modules", "engines", "units", "components" or "systems". In addition, various aspects of the present invention may be represented 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 one of ordinary skill in the art to which the invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0093] The above is an explanation of the present invention and should not be considered as a limitation thereof. Although several exemplary embodiments of the present invention have been described, it will be readily appreciated by those skilled in the art that many modifications may 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 in the claims. It should be understood that the above is an explanation of the present invention and should not be considered as being 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 corresponding to 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.

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 2, characterized in that: 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 The raw material storage and delivery ratio coefficient RSij corresponding to each production time point in each production period in the carbonless copy paper production process is calculated.

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 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.

5. The automatic feeding control system for raw materials used in the production of carbonless copy paper according to claim 1, characterized in that: 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 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 testing the viscosity of the feeding raw material at different temperatures in the laboratory, and then fitting the test data to the Arrhenius equation through the nonlinear regression method.

6. The automatic feeding control system for raw materials used in the production of carbonless copy paper according to claim 5, characterized in that: 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 .

7. The automatic feeding control system for raw materials used in the production of carbonless copy paper according to claim 6, characterized in that: 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.

8. 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.

9. The automatic feeding control system for raw materials used in the production of carbonless copy paper according to claim 8, 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.

10. The automatic feeding control system for raw materials used in the production of carbonless copy paper according to claim 9, 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.

Images