Method and system for energy consumption and strength coordination control of precast cement component steam curing

Abstract

The application relates to the technical field of preparation control, and discloses a method and system for steam curing energy consumption and strength coordination control of prefabricated cement components, which comprises the following steps: constructing a steam curing temperature curve and a steam curing humidity curve of the prefabricated cement components based on preparation conditions; constructing a regulation deviation sequence based on the deviation of the steam curing temperature curve from a standard steam curing temperature curve and the deviation of the steam curing humidity curve from a standard steam curing humidity curve; judging whether a steam regulation strategy is executed based on the number of deviations in the regulation deviation sequence; if it is judged that the steam regulation strategy is executed, comparing the regulation deviation sequence in a historical database; if it is judged that a steam regulation strategy is executed, determining a steam supply amount based on a historical repetition degree; adjusting the steam supply amount based on the ratio of a surplus amount to a deficit amount of historical preparation records, and completing the preparation of the prefabricated cement components according to the adjusted steam supply amount. The application ensures the strength of the prefabricated cement components and the reliability of steam curing.

Description

Technical Field

[0001] This invention relates to the field of preparation control technology, and more specifically, to a method and system for synergistic control of energy consumption and strength during steam curing of precast cement components. Background Technology

[0002] Precast cement components undergo processes such as molding, static curing, steam curing, demolding, and subsequent curing. Steam curing is a crucial step affecting the early strength development of components and production turnover efficiency. It accelerates the cement hydration reaction, allowing precast cement components to reach demolding or transport strength requirements in a shorter time, thus improving production efficiency. However, in actual production, excessive steam supply, rapid temperature rise in the curing chamber, or excessive heat input during the constant temperature phase not only increases the energy consumption per component but also causes localized water loss and micro-cracks. Conversely, insufficient steam supply makes it difficult to maintain the temperature and humidity in the curing chamber, reducing the hydration reaction rate and resulting in insufficient strength gain, which in turn affects demolding time, production cycle, and component quality stability. Currently, steam supply control for precast cement component steam curing relies on human experience to set parameters. These parameters depend on the experience of personnel involved in the relevant processes. Due to differences in worker understanding, the parameters set by different workers do not match the steam curing requirements. The lack of a feedback and adjustment mechanism leads to insufficient strength of precast cement components and inadequate reliability of steam curing.

[0003] Therefore, it is necessary to design a method and system for the coordinated control of energy consumption and strength of precast cement components during steam curing in order to solve the problems existing in the current technology. Summary of the Invention

[0004] In view of this, the present invention proposes a method and system for coordinated control of energy consumption and strength of precast cement components during steam curing, aiming to solve the problem that the parameters set by different workers do not match the steam curing requirements, and the lack of feedback adjustment mechanism leads to insufficient strength of precast cement components and insufficient reliability of steam curing.

[0005] This invention proposes a method for synergistic control of energy consumption and strength during steam curing of precast cement components, comprising: Obtain the preparation working condition parameters, construct the preparation conditions based on the preparation working condition parameters, and determine the standard steam curing temperature curve and standard steam curing humidity curve, and obtain the steam curing temperature curve and steam curing humidity curve of the precast cement component; Based on the deviation between the steam curing temperature curve and the standard steam curing temperature curve, and the deviation between the steam curing humidity curve and the standard steam curing humidity curve, a control deviation sequence is constructed, and the steam regulation strategy is determined based on the number of deviations in the control deviation sequence. If it is determined that the steam regulation strategy will be executed, the regulation deviation sequence will be compared with the historical database, and the recurrence rate of the regulation deviation sequence will be used to determine whether to execute the recurrence steam strategy or the prediction steam strategy. If it is determined that the recurrence steam strategy will be executed, the steam supply will be determined based on the historical recurrence rate. If it is determined that the prediction steam strategy will be executed, the steam supply will be determined based on machine learning. The historical preparation records of the precast cement components are obtained, and the historical preparation records are analyzed to determine whether the steam supply should be adjusted. If it is determined that the steam supply should be adjusted, the steam supply is adjusted based on the ratio of the surplus to the deficit in the historical preparation records, and the preparation of the precast cement components is completed according to the adjusted steam supply.

[0006] Furthermore, when obtaining the steam curing temperature curve and steam curing humidity curve of precast cement components, the following are included: Extract the steam curing temperature and humidity; The extraction time for each steam curing temperature is used as the x-axis coordinate value, and each steam curing temperature is used as the y-axis coordinate value. Based on the x-axis coordinate value and the y-axis coordinate value, all steam curing temperatures are converted into temperature coordinate points, and a steam curing temperature coordinate system is established. The steam curing temperature curve is determined by curve fitting of all temperature coordinate points, and the steam curing humidity curve is determined by curve fitting of all humidity coordinate points.

[0007] Furthermore, in constructing the regulation deviation sequence, the following is included: Determine the temperature deviation between each temperature coordinate point in the steam curing temperature curve and the corresponding standard temperature coordinate point in the standard steam curing temperature curve; determine the humidity deviation between each humidity coordinate point in the steam curing humidity curve and the corresponding standard humidity coordinate point in the standard steam curing humidity curve. Based on the order of all temperature coordinate points, all temperature deviations are constructed into a temperature deviation sequence, and based on the order of all humidity coordinate points, all humidity deviations are constructed into a humidity deviation sequence. The temperature deviation sequence and the humidity deviation sequence are then concatenated to determine the control deviation amount sequence.

[0008] Furthermore, when determining whether to execute a steam regulation strategy based on the number of deviations in the aforementioned regulation deviation sequence, the following steps are included: The number of temperature deviations with non-zero values ​​in the control deviation sequence is counted, the number of humidity deviations with non-zero values ​​in the control deviation sequence is counted, and the sum of the number of temperature deviations and the number of humidity deviations is recorded as the number of deviations. If the number of deviations is greater than or equal to the deviation number threshold, then the steam regulation strategy is executed. If the number of deviations is less than the deviation number threshold, it is determined that the steam regulation strategy will not be executed, and the preparation of the precast cement component will be completed.

[0009] Furthermore, when executing a recurring steam strategy or a predictive steam strategy based on the historical recurrence rate of the aforementioned control deviation sequence, the following steps are included: The historical database includes several historical control deviation sequences and several historical steam supply quantities, with each historical control deviation sequence corresponding to a historical steam supply quantity. The control deviation sequence is compared with each historical control deviation sequence to determine the historical reproducibility. If there is a historical control deviation sequence with a historical recurrence rate greater than or equal to the historical recurrence rate threshold, then the recurrence steam strategy is executed; otherwise, the prediction steam strategy is executed.

[0010] Furthermore, in determining the steam supply, the following factors are considered: If it is determined that the reproducible steam strategy will be implemented, then the historical steam supply with the maximum historical reproducibility will be determined. If the historical steam supply corresponding to the maximum historical reproducibility is unique, then the historical steam supply corresponding to that historical steam supply shall be taken as the steam supply. If the historical steam supply corresponding to the maximum historical reproducibility is not unique, then the average of the historical steam supply corresponding to each historical steam supply with the maximum historical reproducibility shall be taken as the steam supply.

[0011] Furthermore, determining the steam supply also includes: If it is determined that the predicted steam strategy will be implemented, a dataset is constructed based on the historical database, a prediction model is determined based on the dataset, and the steam supply is determined based on the prediction model and the control deviation sequence.

[0012] Furthermore, when analyzing the historical preparation records to determine whether to adjust the steam supply, the process includes: Identify the surplus records, deficit records, and normal records in the historical preparation records; If there are no surplus records or deficit records in the historical preparation records, it is determined that the steam supply will not be adjusted, and the preparation of the precast cement component will be completed according to the steam supply. Otherwise, it is determined that the steam supply will be adjusted.

[0013] Furthermore, when adjusting the steam supply based on the ratio of surplus to deficit in the historical preparation records, the adjustment includes: The number of surplus records is counted and recorded as the surplus amount, and the number of deficit records is counted and recorded as the deficit amount. Based on the ratio of the surplus amount to the deficit amount, a pre-set compensation factor is selected to adjust the steam supply amount, and the steam supply amount is directly proportional to the compensation factor.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: by obtaining the preparation condition parameters of the precast cement components and constructing the preparation conditions based on the preparation condition parameters, it ensures that the standard steam curing temperature curve and the standard steam curing humidity curve can match the strength target of the current component, avoiding the risk of the steam curing system being inconsistent with the actual curing requirements due to relying on manual experience to set steam parameters. By constructing the steam curing temperature curve and the steam curing humidity curve and comparing the deviations, the steam curing process can be transformed into a quantitative sequence of control deviations, ensuring the reliability of the steam regulation strategy. The number of deviations in the control deviation sequence is statistically analyzed to determine whether to execute the steam regulation strategy. It can maintain the current steam curing state based on the deviations or adaptively regulate when the deviations accumulate, thereby improving the stability of the steam curing process. By comparing the control deviation sequence with the historical database and selecting either a reproducible steam strategy or a predictive steam strategy based on the historical reproducibility, the effective steam supply can be quickly reused under similar historical conditions, improving the adaptability and accuracy of the steam supply. By analyzing the surplus and deficit records in the historical preparation records and correcting the steam supply based on the ratio of surplus to deficit, the system can balance the achievement of component strength standards and steam curing energy consumption, avoiding insufficient strength growth due to insufficient steam supply and energy waste due to excessive steam supply, thereby improving the reliability and production continuity of precast cement component steam curing control.

[0015] On the other hand, this application also provides a system for the coordinated control of steam curing energy consumption and strength of precast cement components, for applying the above-mentioned method for the coordinated control of steam curing energy consumption and strength of precast cement components, including: The acquisition unit is configured to acquire preparation condition parameters, construct preparation conditions based on the preparation condition parameters, determine the standard steam curing temperature curve and the standard steam curing humidity curve, and acquire the steam curing temperature curve and steam curing humidity curve of the precast cement component. The analysis unit is configured to construct a control deviation sequence based on the deviation between the steam curing temperature curve and the standard steam curing temperature curve, and the deviation between the steam curing humidity curve and the standard steam curing humidity curve, and to determine whether to execute a steam regulation strategy based on the number of deviations in the control deviation sequence. The processing unit is configured to, if it is determined that the steam regulation strategy will be executed, compare the regulation deviation sequence in a historical database, and determine whether to execute a recurring steam strategy or a predictive steam strategy based on the historical reproducibility of the regulation deviation sequence; if it is determined that the recurring steam strategy will be executed, determine the steam supply based on the historical reproducibility; if it is determined that the predictive steam strategy will be executed, determine the steam supply based on machine learning. The control unit is configured to acquire historical preparation records of the precast cement component, analyze the historical preparation records to determine whether to adjust the steam supply. If it is determined that the steam supply should be adjusted, the steam supply is adjusted based on the ratio of surplus to deficit in the historical preparation records, and the preparation of the precast cement component is completed according to the adjusted steam supply.

[0016] It is understandable that the above-mentioned method and system for synergistic control of energy consumption and strength during steam curing of precast cement components have the same beneficial effects, and will not be elaborated further here. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating a method for synergistic control of steam curing energy consumption and strength of precast cement components, provided in an embodiment of the present invention; Figure 2 A logic flowchart for determining whether to execute a steam regulation strategy based on the number of deviations, provided in an embodiment of the present invention; Figure 3 This is a functional block diagram of a system for coordinated control of steam curing energy consumption and strength of precast cement components, provided in an embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] See Figure 1-2 As shown in some embodiments of this application, a method for synergistic control of steam curing energy consumption and strength of precast cement components includes: S100: Obtain preparation condition parameters, construct preparation conditions based on preparation condition parameters and determine standard steam curing temperature curve and standard steam curing humidity curve, and construct steam curing temperature curve and steam curing humidity curve of precast cement components based on preparation conditions; S200: Based on the deviation between the steam curing temperature curve and the standard steam curing temperature curve, and the deviation between the steam curing humidity curve and the standard steam curing humidity curve, a control deviation sequence is constructed, and the steam control strategy is determined based on the number of deviations in the control deviation sequence. S300: If it is determined that a steam regulation strategy should be executed, the regulation deviation sequence is compared with the historical database, and the recurrence rate of the regulation deviation sequence is used to determine whether to execute a recurrence steam strategy or a prediction steam strategy. If it is determined that a recurrence steam strategy should be executed, the steam supply is determined based on the historical recurrence rate. If it is determined that a prediction steam strategy should be executed, the steam supply is determined based on machine learning. S400: Obtain historical preparation records of precast cement components, analyze the historical preparation records to determine whether to adjust the steam supply. If it is determined that the steam supply should be adjusted, the steam supply is adjusted based on the ratio of surplus to deficit in the historical preparation records, and the preparation of precast cement components is completed according to the adjusted steam supply.

[0022] Specifically, the method provided in this embodiment is applicable to the steam curing control process in a precast cement component production line. The precast cement components can be precast composite slabs, precast beams, precast columns, precast wall panels, pipe segments, grooved components, or other cement-based components that require steam curing to improve early strength.

[0023] In S100, preparation condition parameters are production parameters that affect the steam curing process, energy consumption level, and strength development of precast cement components. These parameters include cement type, water-cement ratio, admixture type and dosage, target demolding strength, and production cycle time requirements. Among these parameters, cement type, water-cement ratio, and admixtures affect the cement hydration rate, while the target demolding strength and production cycle time affect the required rate of increase in steam-cured strength. Therefore, preparation condition parameters serve as the basis for determining the standard steam curing temperature curve and standard steam curing humidity curve. Preparation conditions are set in conjunction with the precast cement components to define the current production context of the precast cement components. In other words, preparation conditions must meet both the curing requirements and strength requirements of the precast cement components, thereby ensuring that the standard steam curing temperature curve and standard steam curing humidity curve are curves derived to achieve the target strength of the precast cement components while controlling energy consumption.

[0024] Specifically, for the same type of component and the same mix ratio, when multiple batches meet the strength standard and the steam energy consumption is within the industry standard or a manually set range, envelope processing can be performed through experimental simulation and Matlab software simulation to obtain the standard steam curing temperature curve and standard steam curing humidity curve under the preparation conditions. It should be noted that since the standard steam curing temperature curve and standard steam curing humidity curve are curves obtained under ideal conditions, the standard steam curing temperature curve is actually two curves, one is the upper boundary curve for achieving the best effect, and the other is the lower boundary curve for achieving the best effect, thus limiting the range that other steam curing temperature curves should reach. The same applies to the standard steam curing humidity curve.

[0025] When extracting the steam curing temperature and humidity, temperature and humidity sampling points are set up in the steam curing chamber. These sampling points use temperature and humidity sensors to collect the temperature and humidity data in real time. Furthermore, the extraction time for steam curing temperature and humidity is consistent with the data collection time interval between each data point when establishing the standard steam curing temperature and humidity curves to ensure comparability between the curves. The extraction time for each steam curing temperature is used as the x-axis coordinate value, with the extraction time set to once every two seconds or once every four seconds, meaning the extraction time follows an arithmetic sequence. Therefore, the extraction time for the standard steam curing temperature curve also follows the same arithmetic sequence. In this example, the hydration stage is selected and a three-minute time span is set. The specific time span and the selected cement preparation stage can be adjusted according to different precast cement components. In this embodiment, a three-minute time span is chosen to establish the standard steam curing temperature curve, standard steam curing humidity curve, steam curing temperature curve, and steam curing humidity curve. Each steam curing temperature is used as a y-axis coordinate value. Based on the x-axis and y-axis coordinate values, all steam curing temperatures are converted into temperature coordinate points, and a steam curing temperature coordinate system is established. The steam curing temperature coordinate system is also a plane rectangular coordinate system. Similarly, the steam curing humidity is handled in the same way.

[0026] After determining all temperature and humidity coordinate points, each temperature coordinate point is substituted into the steam curing temperature coordinate system, and each humidity coordinate point is substituted into the steam curing humidity coordinate system. Curve fitting is performed using methods such as polynomial fitting, spline interpolation, or least squares method to obtain the steam curing temperature curve and the steam curing humidity curve, respectively. Curve fitting converts the discrete temperature and humidity data into a continuous curve that can be compared point by point with the standard steam curing curve, ensuring the comparability between the curves.

[0027] In S200, when constructing the control deviation sequence, the corresponding standard temperature coordinate point is a curve coordinate point with the same extraction time as the current temperature coordinate point, and the corresponding standard humidity coordinate point is a curve coordinate point with the same extraction time as the current humidity coordinate point. Temperature deviation is used to characterize the degree of deviation between the current actual temperature in the steam curing chamber and the standard steam curing temperature. When selecting a standard temperature coordinate point with the same extraction time as the current temperature coordinate point on the standard steam curing temperature curve, since there are two standard temperature coordinate points—one corresponding to the upper boundary and one to the lower boundary—if the temperature coordinate point is above the standard temperature coordinate point on the upper boundary, the temperature deviation is determined by subtracting the y-axis coordinate value of the upper boundary standard temperature coordinate point from the y-axis coordinate value of the temperature coordinate point. If the temperature coordinate point is below the standard temperature coordinate point on the lower boundary, the temperature deviation is determined by subtracting the y-axis coordinate value of the lower boundary standard temperature coordinate point from the y-axis coordinate value of the temperature coordinate point. If the temperature coordinate point is in the middle range between the standard temperature coordinate points on the upper and lower boundaries, it indicates that the current steam curing temperature is within the standard steam curing temperature range, and the temperature deviation is confirmed as zero. The determination of humidity deviation is similar.

[0028] All temperature deviations are constructed into a temperature deviation sequence based on the order of all temperature coordinate points, and all humidity deviations are constructed into a humidity deviation sequence based on the order of all humidity coordinate points. The humidity deviation sequence is then concatenated with the temperature deviation sequence. The control deviation sequence includes all temperature and humidity deviations. When determining whether to execute a steam control strategy based on the number of deviations in the control deviation sequence, the number of temperature deviations with non-zero values ​​and the number of humidity deviations with non-zero values ​​in the control deviation sequence are counted. The sum of the counted temperature and humidity values ​​is recorded as the deviation quantity. The deviation quantity reflects the abnormal situation of the current steam curing process relative to the standard steam curing process.

[0029] When the deviation is small, it indicates that the actual temperature and humidity curve is close to the standard curve, and there is no need to activate the steam regulation strategy to avoid over-regulation. When the deviation is large, it indicates that the actual steam curing process has significantly deviated from the standard steam curing process, and correction is required by adjusting the steam supply. The deviation threshold can be adjusted according to the strength and design requirements of different precast cement components, and no specific limitation is made here. If the deviation is greater than or equal to the deviation threshold, the steam regulation strategy is executed, and the steam supply is determined based on the similarity between the current deviation state and the historical state. If the deviation is less than the deviation threshold, the steam regulation strategy is not executed, and the precast cement component is prepared according to the current steam curing situation. This avoids frequent opening and closing of steam valves due to local minor fluctuations, thereby reducing control oscillations and ensuring the intelligence and reliability of the control.

[0030] In S300, the historical database includes several historical control deviation sequences and several historical steam supply quantities, with each historical control deviation sequence corresponding to a historical steam supply quantity. The current control deviation sequence is compared with each historical control deviation sequence to determine the historical reproducibility. Historical reproducibility represents the degree of similarity between the current steam curing deviation state and the historical steam curing state, and can be determined based on cosine similarity and Euclidean distance. If a historical control deviation sequence exists with a historical reproducibility greater than or equal to the historical reproducibility threshold, a reproducible steam strategy is executed. The historical reproducibility threshold can be adjusted according to the strength and design requirements of different precast cement components. If the historical database sample size is large, the historical reproducibility threshold can be appropriately increased to ensure sufficient similarity of the reproducible samples; if the historical database sample size is small, the historical reproducibility threshold can be appropriately decreased. If no historical control deviation sequence exists with a historical reproducibility greater than or equal to the historical reproducibility threshold, a predictive steam strategy is executed. The predictive steam strategy is suitable for situations where the deviation state differs significantly from the historical samples, making it impossible to directly rely on historical data to determine the steam supply quantity.

[0031] When determining the steam supply, if a reproducible steam strategy is to be implemented, the historical steam supply with the highest historical reproducibility is determined. The historical steam supply corresponding to the highest historical reproducibility represents the steam supply used under the historical state most similar to the current control deviation sequence. If the historical steam supply corresponding to the highest historical reproducibility is unique, then this historical steam supply is used as the current steam supply. In this case, it indicates that there is a historical record in the historical database that is closest to the current deviation state and has a clear control result, and its steam supply can be directly reused. If the historical steam supply corresponding to the highest historical reproducibility is not unique, then the average of the historical steam supplies corresponding to each historical steam supply with the highest historical reproducibility is used as the steam supply. The fact that the historical steam supply corresponding to the highest historical reproducibility is not unique may be because multiple historical batches have the same or very similar situations. Taking the average can reduce the impact of the randomness of a single historical record, ensuring the reliability and intelligence of the control.

[0032] If a predictive steam strategy is determined to be implemented, a dataset is constructed based on a historical database. During dataset construction, data such as preparation conditions, historical control deviation sequences, historical steam supply, and design point strength of precast cement components can be merged into a dataset. The dataset is then divided into a training set and a test set. A predictive model is trained based on the training and test sets, and the steam supply is determined based on the predictive model and the control deviation sequence. It should be noted that the architecture of the predictive model in this application can employ machine learning models such as regression tree models, random forest models, gradient boosting models, and support vector regression. Preferably, it can be implemented using existing technologies in the field. However, this is not the focus of the improvement claimed in this application. The focus of the improvement in this application is its prediction of steam supply. Those skilled in the art can adapt, replace, or achieve equivalent implementations based on the input-output relationships, parameter configuration rules, and calling sequences disclosed in this application, combined with existing publicly available technologies or conventional engineering methods, without affecting the implementation of the technical solution of this application.

[0033] In S400, historical preparation records of precast cement components are retrieved, and these records are analyzed to determine whether steam supply needs adjustment. These historical preparation records differ from the control deviation sequences in the historical database. The historical database is primarily used to determine steam supply based on deviation status, while historical preparation records are used to correct steam supply based on past preparation results. Surplus records are those where, under similar or identical preparation conditions, the component strength meets the target requirements, and steam supply exceeds the target. Deficit records are those where, under similar or identical preparation conditions, the component strength does not meet the target demolding strength, and steam supply is insufficient. Normal records are those where, under similar or identical preparation conditions, the component strength meets the target requirements, and steam supply energy consumption is within the standard range.

[0034] If there are no surplus or deficit records in the historical preparation records, the steam supply will not be adjusted. This indicates that the steam curing results of similar historical batches are relatively stable, and the steam supply determined by the reproduced or predicted steam strategy is sufficient to meet the control requirements, requiring no additional correction. If there are surplus or deficit records in the historical preparation records, it indicates that the steam curing results of similar historical batches are abnormal, and the steam supply determined by the reproduced or predicted steam strategy cannot meet the strength requirements of the precast cement components, in which case additional correction will be made. When adjusting the steam supply based on the ratio of surplus to deficit in the historical preparation records, the number of surplus records is counted and recorded as surplus, and the number of deficit records is counted and recorded as deficit. A first compensation factor, a second compensation factor, and a third compensation factor are pre-set, with the first compensation factor being greater than the second compensation factor, and the second compensation factor being greater than the third compensation factor. The first, second, and third compensation factors are used to adjust the steam supply.

[0035] The ratio of surplus to deficit is set to K. When K ≤ 1, the steam supply is adjusted according to the first compensation factor; when 1 < K ≤ 1.3, the steam supply is adjusted according to the second compensation factor; and when 1.3 < K, the steam supply is adjusted according to the third compensation factor. The preferred values ​​for the first compensation factor are 1.1, the second compensation factor are 0.9, and the third compensation factor are 0.7. A larger ratio indicates a higher degree of steam supply overflow, requiring a reduction in the steam supply. Conversely, a smaller ratio indicates a higher degree of steam supply insufficiency, requiring an increase in the steam supply. The steam supply is directly proportional to the first, second, or third compensation factor. In other words, after determining the steam supply, it is multiplied by the selected compensation factor to obtain the adjusted steam supply. The adjusted steam supply will not exceed the maximum allowable steam supply capacity of the steam curing equipment, nor will it be lower than the minimum steam supply capacity required to maintain a basic humid and hot environment in the steam curing chamber. When the adjustment result exceeds the equipment's upper limit, the upper limit can be used as the final steam supply. When the adjustment result is lower than the minimum supply, the minimum supply can be used as the final steam supply. If the ratio of surplus to deficit in historical preparation records does not exist (i.e., the deficit is zero, making it impossible to form a ratio), then historical preparation records, steam supply, preparation conditions, and the historical database can be used as the model's sample dataset. Similarly, the model can be trained using machine learning to correct the adjustment range of the steam supply, avoiding blind adjustments when data is lacking, thereby improving the stability and intelligence of the control.

[0036] In a specific production process, the precast cement components are precast composite slabs with a design strength grade of C40, a target demolding strength of 25 MPa, and a component thickness of 60 mm. Steam curing is performed in a steam curing chamber. The preparation parameters include cement type, admixture dosage, and water-cement ratio. Based on these parameters, the current preparation conditions are determined, and standard steam curing temperature and humidity curves are established. During the current batch steam curing process, temperature and humidity data are collected at multiple points within the steam curing chamber at a sampling interval of three seconds. After curve fitting, it is determined that the current steam curing temperature curve and humidity curve are both lower than the standard steam curing temperature and humidity curves at multiple times. The temperature deviation sequence contains 12 non-zero temperature deviations, and the humidity deviation sequence contains 8 non-zero humidity deviations, for a total deviation count of 20. With a deviation count threshold set to 15, the current deviation count exceeds this threshold, triggering a steam regulation strategy. The current regulation deviation sequence is then compared with a historical database. If a similar historical control deviation sequence exists in the historical database, and the historical recurrence rate is greater than the historical recurrence rate threshold, then a recurrence steam strategy is executed, and the historical steam supply corresponding to the highest historical recurrence rate is determined. If this historical steam supply rate is unique, then this historical steam supply rate is used as the total steam supply rate. Historical production records for several batches under the same production conditions are obtained. Analysis reveals 2 surplus records and 5 deficit records, indicating that insufficient strength or insufficient temperature and humidity supply has been frequently observed in recent production of this type of component. The surplus is 2, and the deficit is 5. Based on the ratio of surplus to deficit, the first compensation factor is selected to adjust the steam supply rate, increasing it by 10% relative to the total steam supply rate.

[0037] In summary, by acquiring the preparation conditions parameters of precast cement components and constructing preparation conditions based on these parameters, it is ensured that the standard steam curing temperature curve and standard steam curing humidity curve can match the strength target of the current component. This avoids the risk of inconsistency between the steam curing regime and actual curing requirements due to relying on manual experience to set steam parameters. By constructing the steam curing temperature curve and steam curing humidity curve and comparing the deviations, the steam curing process can be transformed into a quantified sequence of control deviations, ensuring the reliability of the steam regulation strategy. The number of deviations in the control deviation sequence is statistically analyzed to determine whether to implement the steam regulation strategy. Based on the deviations, the current steam curing state can be maintained or adaptively regulated when deviations accumulate, thereby improving the stability of the steam curing process. By comparing the control deviation sequence with the historical database and selecting either a reproducible steam strategy or a predictive steam strategy based on the historical reproducibility, the effective steam supply can be quickly reused under similar historical conditions, improving the adaptability and accuracy of the steam supply. By analyzing the surplus and deficit records in the historical preparation records and correcting the steam supply based on the ratio of surplus to deficit, the system can balance the achievement of component strength standards and steam curing energy consumption, avoiding insufficient strength growth due to insufficient steam supply and energy waste due to excessive steam supply, thereby improving the reliability and production continuity of precast cement component steam curing control.

[0038] Based on another preferred embodiment described above, see [link to preferred embodiment]. Figure 3 As shown, this embodiment provides a system for the coordinated control of steam curing energy consumption and strength of precast cement components, used to apply the above-mentioned method for the coordinated control of steam curing energy consumption and strength of precast cement components, including: The acquisition unit is configured to acquire preparation condition parameters, construct preparation conditions based on the preparation condition parameters, determine the standard steam curing temperature curve and the standard steam curing humidity curve, and acquire the steam curing temperature curve and steam curing humidity curve of the precast cement component. The analysis unit is configured to construct a control deviation sequence based on the deviation between the steam curing temperature curve and the standard steam curing temperature curve, and the deviation between the steam curing humidity curve and the standard steam curing humidity curve, and to determine whether to execute the steam regulation strategy based on the number of deviations in the control deviation sequence. The processing unit is configured to, if it is determined that a steam regulation strategy should be executed, compare the regulation deviation sequence with the historical database, and determine whether to execute a recurrence steam strategy or a prediction steam strategy based on the historical reproducibility of the regulation deviation sequence. If it is determined that a recurrence steam strategy should be executed, the steam supply should be determined based on the historical reproducibility. If it is determined that a prediction steam strategy should be executed, the steam supply should be determined based on machine learning. The control unit is configured to acquire historical preparation records of precast cement components, analyze the historical preparation records to determine whether to adjust the steam supply. If it is determined that the steam supply should be adjusted, the steam supply is adjusted based on the ratio of surplus to deficit in the historical preparation records, and the precast cement components are prepared according to the adjusted steam supply.

[0039] It is understandable that the above-mentioned method and system for synergistic control of energy consumption and strength during steam curing of precast cement components have the same beneficial effects, and will not be elaborated further here.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for synergistic control of energy consumption and strength during steam curing of precast cement components, characterized in that, include: Obtain the preparation working condition parameters, construct the preparation conditions based on the preparation working condition parameters, and determine the standard steam curing temperature curve and standard steam curing humidity curve, and obtain the steam curing temperature curve and steam curing humidity curve of the precast cement component; Based on the deviation between the steam curing temperature curve and the standard steam curing temperature curve, and the deviation between the steam curing humidity curve and the standard steam curing humidity curve, a control deviation sequence is constructed, and the steam regulation strategy is determined based on the number of deviations in the control deviation sequence. If it is determined that the steam regulation strategy will be executed, the regulation deviation sequence will be compared with the historical database, and the recurrence rate of the regulation deviation sequence will be used to determine whether to execute the recurrence steam strategy or the prediction steam strategy. If it is determined that the recurrence steam strategy will be executed, the steam supply will be determined based on the historical recurrence rate. If it is determined that the prediction steam strategy will be executed, the steam supply will be determined based on machine learning. The historical preparation records of the precast cement components are obtained, and the historical preparation records are analyzed to determine whether the steam supply should be adjusted. If it is determined that the steam supply should be adjusted, the steam supply is adjusted based on the ratio of the surplus to the deficit in the historical preparation records, and the preparation of the precast cement components is completed according to the adjusted steam supply.

2. The method for synergistic control of energy consumption and strength during steam curing of precast cement components according to claim 1, characterized in that, When obtaining the steam curing temperature curve and steam curing humidity curve of precast cement components, the following should be included: Extract the steam curing temperature and humidity; The extraction time for each steam curing temperature is used as the x-axis coordinate value, and each steam curing temperature is used as the y-axis coordinate value. Based on the x-axis coordinate value and the y-axis coordinate value, all steam curing temperatures are converted into temperature coordinate points, and a steam curing temperature coordinate system is established. The steam curing temperature curve is determined by curve fitting of all temperature coordinate points, and the steam curing humidity curve is determined by curve fitting of all humidity coordinate points.

3. The method for synergistic control of energy consumption and strength during steam curing of precast cement components according to claim 2, characterized in that, When constructing the regulation deviation sequence, the following is included: Determine the temperature deviation between each temperature coordinate point in the steam curing temperature curve and the corresponding standard temperature coordinate point in the standard steam curing temperature curve; determine the humidity deviation between each humidity coordinate point in the steam curing humidity curve and the corresponding standard humidity coordinate point in the standard steam curing humidity curve. Based on the order of all temperature coordinate points, all temperature deviations are constructed into a temperature deviation sequence, and based on the order of all humidity coordinate points, all humidity deviations are constructed into a humidity deviation sequence. The temperature deviation sequence and the humidity deviation sequence are then concatenated to determine the control deviation amount sequence.

4. The method for synergistic control of energy consumption and strength during steam curing of precast cement components according to claim 3, characterized in that, When determining whether to execute a steam regulation strategy based on the number of deviations in the regulation deviation sequence, the following steps are included: The number of temperature deviations with non-zero values ​​in the control deviation sequence is counted, the number of humidity deviations with non-zero values ​​in the control deviation sequence is counted, and the sum of the number of temperature deviations and the number of humidity deviations is recorded as the number of deviations. If the number of deviations is greater than or equal to the deviation number threshold, then the steam regulation strategy is executed. If the number of deviations is less than the deviation number threshold, it is determined that the steam regulation strategy will not be executed, and the preparation of the precast cement component will be completed.

5. The method for synergistic control of energy consumption and strength during steam curing of precast cement components according to claim 4, characterized in that, When executing a recurring steam strategy or a predictive steam strategy based on the historical recurrence rate of the control deviation sequence, the following are included: The historical database includes several historical control deviation sequences and several historical steam supply quantities, with each historical control deviation sequence corresponding to a historical steam supply quantity. The control deviation sequence is compared with each historical control deviation sequence to determine the historical reproducibility. If there is a historical control deviation sequence with a historical recurrence rate greater than or equal to the historical recurrence rate threshold, then the recurrence steam strategy is executed; otherwise, the prediction steam strategy is executed.

6. The method for synergistic control of energy consumption and strength during steam curing of precast cement components according to claim 5, characterized in that, Determining the steam supply includes: If it is determined that the reproducible steam strategy will be implemented, then the historical steam supply with the maximum historical reproducibility will be determined. If the historical steam supply corresponding to the maximum historical reproducibility is unique, then the historical steam supply corresponding to that historical steam supply shall be taken as the steam supply. If the historical steam supply corresponding to the maximum historical reproducibility is not unique, then the average of the historical steam supply corresponding to each historical steam supply with the maximum historical reproducibility shall be taken as the steam supply.

7. The method for synergistic control of energy consumption and strength during steam curing of precast cement components according to claim 6, characterized in that, Determining the steam supply also includes: If it is determined that the predicted steam strategy will be implemented, a dataset is constructed based on the historical database, a prediction model is determined based on the dataset, and the steam supply is determined based on the prediction model and the control deviation sequence.

8. The method for synergistic control of energy consumption and strength during steam curing of precast cement components according to claim 7, characterized in that, When analyzing the historical preparation records to determine whether to adjust the steam supply, the process includes: Identify the surplus records, deficit records, and normal records in the historical preparation records; If there are no surplus records or deficit records in the historical preparation records, it is determined that the steam supply will not be adjusted, and the preparation of the precast cement component will be completed according to the steam supply. Otherwise, it is determined that the steam supply will be adjusted.

9. The method for synergistic control of energy consumption and strength during steam curing of precast cement components according to claim 8, characterized in that, When adjusting the steam supply based on the ratio of surplus to deficit in the historical preparation records, the following steps are included: The number of surplus records is counted and recorded as the surplus amount, and the number of deficit records is counted and recorded as the deficit amount. Based on the ratio of the surplus amount to the deficit amount, a pre-set compensation factor is selected to adjust the steam supply amount, and the steam supply amount is directly proportional to the compensation factor.

10. A system for the coordinated control of steam curing energy consumption and strength of precast cement components, used to apply the method for the coordinated control of steam curing energy consumption and strength of precast cement components as described in any one of claims 1-9, characterized in that, include: The acquisition unit is configured to acquire preparation condition parameters, construct preparation conditions based on the preparation condition parameters, determine the standard steam curing temperature curve and the standard steam curing humidity curve, and acquire the steam curing temperature curve and steam curing humidity curve of the precast cement component. The analysis unit is configured to construct a control deviation sequence based on the deviation between the steam curing temperature curve and the standard steam curing temperature curve, and the deviation between the steam curing humidity curve and the standard steam curing humidity curve, and to determine whether to execute a steam regulation strategy based on the number of deviations in the control deviation sequence. The processing unit is configured to, if it is determined that the steam regulation strategy will be executed, compare the regulation deviation sequence in a historical database, and determine whether to execute a recurring steam strategy or a predictive steam strategy based on the historical reproducibility of the regulation deviation sequence; if it is determined that the recurring steam strategy will be executed, determine the steam supply based on the historical reproducibility; if it is determined that the predictive steam strategy will be executed, determine the steam supply based on machine learning. The control unit is configured to acquire historical preparation records of the precast cement component, analyze the historical preparation records to determine whether to adjust the steam supply. If it is determined that the steam supply should be adjusted, the steam supply is adjusted based on the ratio of surplus to deficit in the historical preparation records, and the preparation of the precast cement component is completed according to the adjusted steam supply.

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