Automatic start-up control method, system and equipment for drying furnace

Abstract

This application discloses an automatic start-up control method, system, and equipment for a drying oven. The method includes: acquiring the target vehicle arrival time, the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone; dividing the heating process of the drying oven into multiple operating stages, and obtaining the stage duration corresponding to each operating stage based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone, wherein the operating stages include the heating stage of the baking zone; determining the previous total heating time based on the stage duration, and then obtaining the current duration adjustment value corresponding to the heating stage of the baking zone based on the previous total heating time and the target vehicle arrival time; determining the current start-up time based on the target vehicle arrival time, the previous total heating time, and the current duration adjustment value, and then controlling the drying oven to start operation at the current start-up time. This application can realize automated start-up control of the drying oven, save energy and reduce manual management costs, and can be widely applied in the field of vehicle manufacturing technology.

Description

Technical Field

[0001] This application relates to the field of vehicle manufacturing technology, and in particular to an automatic start-up control method, device and equipment for a drying oven. Background Technology

[0002] Currently, the drying ovens in the painting workshop are started using a customized timetable system, specifically divided into summer and winter schedules. Staff must strictly adhere to the corresponding seasonal schedule and manually operate the ovens to complete the start-up process. While this start-up method has a fixed standard, it has several drawbacks in practical application. For example, to ensure that subsequent equipment can complete heating on time, some equipment needs to be started up much earlier, resulting in unnecessary waste of energy and costs. Summary of the Invention

[0003] The main objective of this application is to provide an automatic start-up control method, device, and equipment for a drying oven, which can achieve automated start-up control, save energy, and reduce manual management costs.

[0004] To achieve the above objectives, one aspect of this application proposes an automatic start-up control method for a drying oven, comprising the following steps: Acquire the target vehicle entry time, initial temperature of the baking zone, target temperature of the baking zone, and temperature rise slope of the baking zone; The heating process of the drying oven is divided into multiple operating stages, and the duration of each operating stage is obtained according to the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone. The operating stage includes the heating stage of the baking zone. The previous total heating time is determined based on the stage duration, and then the current duration adjustment value corresponding to the heating stage of the baking zone is obtained based on the previous total heating time and the target vehicle entry time. Based on the target vehicle entry time, the previous total heating time, and the current duration adjustment value, the current start-up time is determined, and then the drying oven is controlled to start up and run at the current start-up time.

[0005] In some embodiments, dividing the heating process of the drying oven into multiple operating stages, and obtaining the stage duration corresponding to each operating stage based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone, specifically includes: The heating process of the drying oven is divided into a pre-purging stage, a combustion chamber heating stage, a baking zone heating stage, and a baking zone heat preservation stage. The durations of the first stage, the second stage, and the fourth stage corresponding to the pre-purge stage, the combustion chamber heating stage, and the baking zone heat preservation stage are collected respectively. The duration of the third stage corresponding to the heating stage of the baking zone is calculated based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone.

[0006] In some embodiments, calculating the duration of the third stage corresponding to the heating stage of the baking zone based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone specifically includes: The first difference is obtained by calculating the difference between the target temperature of the baking zone and the initial temperature of the baking zone. The duration of the third stage is obtained by dividing the first difference by the temperature rise slope of the baking zone.

[0007] In some embodiments, obtaining the current duration adjustment value corresponding to the heating stage of the baking zone based on the previous total heating time and the target vehicle entry time specifically includes: Obtain the previous duration adjustment value and the deviation elimination amount corresponding to the previous duration adjustment value; The previous heating completion time is determined based on the previous total heating time and the previous time adjustment value. The difference between the previous heating completion time and the target vehicle entry time is calculated to obtain the second difference. When the second difference is not zero, the adjustment efficiency is calculated based on the previous duration adjustment value and the deviation elimination amount; The second difference is graded and corrected according to the adjustment efficiency to obtain the current duration adjustment value corresponding to the heating stage of the baking zone.

[0008] In some embodiments, calculating the adjustment effectiveness based on the previous duration adjustment value and the deviation elimination amount specifically includes: If the sign of the deviation elimination amount is inconsistent with the sign of the previous duration adjustment value, the adjustment effectiveness is set to zero and an early warning signal is generated; If the sign of the deviation elimination amount is the same as the sign of the previous duration adjustment value, and the previous duration adjustment value is less than or equal to a preset minimum order value threshold, the adjustment effectiveness rate is set to one. If the sign of the deviation elimination amount is the same as the sign of the previous duration adjustment value, and the previous duration adjustment value is greater than a preset minimum threshold, the deviation elimination amount and the previous duration adjustment value are divided to obtain the adjustment efficiency.

[0009] In some embodiments, the step of performing graded correction on the second difference based on the adjustment effectiveness to obtain the current duration adjustment value corresponding to the heating stage of the baking zone specifically includes: When the adjustment effectiveness rate is greater than or equal to the first preset value, the second difference is determined to be the current duration adjustment value; When the adjustment efficiency is less than the first preset value and greater than the second preset value, the current duration adjustment value is determined to be the product of the second difference and the first graded correction value. When the adjustment effectiveness is less than or equal to the second preset value, the current duration adjustment value is determined to be the product of the second difference and the second graded correction value. Wherein, the first preset value is greater than the second preset value, and the first graded correction value is less than the second graded correction value.

[0010] In some embodiments, determining the current start-up time based on the target vehicle entry time, the previous total heating time, and the current duration adjustment value specifically includes: The sum of the previous total heating time, the previous time adjustment value, and the current time adjustment value is calculated to obtain the first sum. The current startup time is obtained by performing a difference operation between the target vehicle entry time and the first sum.

[0011] To achieve the above objectives, another aspect of this application provides an automatic start-up control device for a drying oven, comprising: The parameter acquisition module is used to acquire the target entry time, the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone. The stage duration calculation module is used to divide the heating process of the drying oven into multiple operating stages, and to obtain the stage duration corresponding to each operating stage based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone. The operating stage includes the heating stage of the baking zone. The duration adjustment value determination module is used to determine the previous total heating duration based on the stage duration, and then obtain the current duration adjustment value corresponding to the heating stage of the baking zone based on the previous total heating duration and the target vehicle entry time. The start-up control module is used to determine the current start-up time based on the target vehicle entry time, the previous total heating time, and the current duration adjustment value, and then control the drying oven to start up and run at the current start-up time.

[0012] To achieve the above objectives, another aspect of this application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the method described above.

[0013] To achieve the above objectives, another aspect of the embodiments of this application proposes a computer program product, including a computer program that, when executed by a processor, implements the aforementioned method.

[0014] The embodiments of this application include at least the following beneficial effects: The automatic start-up control method, device, and equipment for the drying oven of this application first obtain the target arrival time, the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone; then, the heating process of the drying oven is divided into multiple operating stages, including the heating stage of the baking zone; then, based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone, the stage duration corresponding to each operating stage is obtained; then, based on the stage duration, the previous total heating duration is determined, and then based on the previous total heating duration and the target arrival time, the current duration adjustment value corresponding to the heating stage of the baking zone is obtained; finally, based on the target arrival time, the previous total heating duration, and the current duration adjustment value, the current start-up time is determined, and then the drying oven is controlled to start up and run at the current start-up time. This application divides the heating process of the drying oven into multiple operating stages, thereby decomposing the complex nonlinear heating process into multiple controllable stages. Based on the actual total heating time and the target vehicle entry time, the current time adjustment value is calculated, and the optimal drying oven start-up time is determined. This improves the control accuracy and adaptability of the drying oven start-up time, reduces the ineffective operating time of the drying oven, and ultimately realizes automated start-up control of the drying oven, saving energy and reducing manual management costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments of this application are described below. It should be understood that the drawings described below are only for the purpose of clearly illustrating some embodiments of the technical solutions in this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a drying oven provided in one embodiment of this application; Figure 2 This is a schematic diagram of the heat exchange in a combustion chamber according to one embodiment of this application; Figure 3 This is a flowchart illustrating the steps of an automatic start-up control method for a drying oven provided in one embodiment of this application. Figure 4 This is a schematic diagram of the heating curve of a drying oven provided in one embodiment of this application; Figure 5 This is a schematic diagram of the structure of an automatic start-up control device for a drying oven provided in one embodiment of this application; Figure 6 This is a schematic diagram of the hardware structure of an electronic device provided in one embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0019] In the vehicle manufacturing process, the paint drying oven is a key piece of equipment for ensuring the quality of the vehicle body paint. Its core function is to perform high-temperature drying on the painted vehicle body. Through a stable temperature environment, the paint coating is rapidly cured and set, enhancing its adhesion and abrasion resistance, preventing problems such as sagging, peeling, and flaking. It also improves the smoothness of the vehicle's appearance and extends its corrosion resistance, laying a solid foundation for overall vehicle quality. This drying oven uses natural gas as its heating energy source, which is clean, efficient, and provides stable heat. A circulating fan evenly distributes the heat generated by combustion throughout the baking area, ensuring uniform heating of all parts of the vehicle body and consistent paint drying results. Its operation follows a fixed procedure: it must be preheated beforehand, and production can only begin after the oven temperature reaches the set standard. Furthermore, the oven must be delayed in shutting down after production is completed and all vehicles are shipped to avoid sudden temperature changes that could damage the equipment or affect subsequent use. In actual production, the timing of starting the drying oven is crucial. It must be started in advance and the temperature must be fully raised. Starting production before the specified temperature is reached will result in incomplete paint drying, affecting paint quality and delaying production progress.

[0020] The drying ovens in painting workshops mostly employ indirect heating. Their core design feature is that the gases produced by combustion do not directly enter the baking area, but instead undergo gas-to-gas heat exchange through a metal heat exchanger. This prevents combustion gases from contaminating the vehicle body coating and ensures drying quality. Figure 1 The diagram shown is a system schematic of the drying oven. Figure 2The diagram shows a schematic of heat exchange in the combustion chamber. The heat transfer in the drying oven follows a fixed and cyclical route: First, the burner generates heat by burning fuel, which directly heats the metal heat exchanger. Then, the baking gas flows through the heated metal heat exchanger, absorbing the heat transferred and increasing its temperature. The heated baking gas is then transported to the baking zone, uniformly heating the car body to be dried and completing the coating drying process. After releasing heat, the temperature of the baking gas decreases, and it then re-enters the metal heat exchanger to absorb heat again and increase its temperature, forming a continuous heating cycle. Furthermore, the oven's start-up and heating process is not instantaneous but a phased and gradual process, mainly involving three key steps: First, the burner starts and begins to heat up, generating the basic heat required for drying; second, the heat generated by combustion is transferred to the metal heat exchanger, gradually increasing its temperature to the set standard; third, the baking gas absorbs heat through the heat exchanger and continuously heats the baking zone until the temperature reaches the required production level, completing the entire heating process.

[0021] Currently, the drying ovens in the painting workshop are started up using a customized schedule. Staff manually operate the ovens according to the schedule, which has the following drawbacks: First, the principle of "inspection first, then start-up" must be strictly followed when starting up. The entire start-up process involves 9 related devices and takes about 1 hour to complete. This time-consuming process is prone to two problems: either some devices cannot be started up in time, affecting the subsequent production progress; or in order to ensure that the subsequent devices can be heated up on time, some devices need to be started up earlier, resulting in energy waste.

[0022] Second, the existing schedule is a fixed setting and cannot be flexibly adjusted according to the actual situation of the day to optimize the start-up time. As a result, the start-up time is always set according to the fixed time, regardless of whether the actual start-up time is reasonable, which further aggravates energy consumption.

[0023] Third, from the perspective of personnel operation, in order to avoid their own responsibility and to avoid delays in starting up due to untimely start-up or malfunctions during the start-up process, which would affect production, workers often take the initiative to start up the machine in advance, which increases the ineffective running time of the drying oven and causes unnecessary energy waste.

[0024] In view of this, this application proposes an automatic start-up control method for a drying oven. First, the target arrival time, initial temperature of the baking zone, target temperature of the baking zone, and temperature rise slope of the baking zone are obtained. Then, the heating process of the drying oven is divided into multiple operating stages, including a baking zone heating stage. Next, based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone, the stage duration corresponding to each operating stage is obtained. Then, based on the stage duration, the previous total heating duration is determined. Then, based on the previous total heating duration and the target arrival time, the current duration adjustment value corresponding to the baking zone heating stage is obtained. Finally, based on the target arrival time, the previous total heating duration, and the current duration adjustment value, the current start-up time is determined, thereby controlling the drying oven to start operation at the current start-up time. This application divides the heating process of the drying oven into multiple operating stages, thereby decomposing the complex nonlinear heating process into multiple controllable stages. Based on the actual total heating time and the target vehicle entry time, the current time adjustment value is calculated, and the optimal drying oven start-up time is determined. This improves the control accuracy and adaptability of the drying oven start-up time, reduces the ineffective operating time of the drying oven, and ultimately realizes automated start-up control of the drying oven, saving energy and reducing manual management costs.

[0025] Reference Figure 3 , Figure 3 This is a flowchart illustrating the steps of an automatic start-up control method for a drying oven according to an embodiment of this application. This application proposes an automatic start-up control method for a drying oven, which may include, but is not limited to, the following steps S101 to S104: Step S101: Obtain the target vehicle entry time, the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone; In some optional embodiments, the target vehicle arrival time is obtained based on actual production plan data; the initial temperature of the baking zone is collected by multiple temperature sensors installed on the inner wall of the furnace or the circulating air duct; the target temperature of the baking zone is determined from preset configuration data based on the process parameters of the vehicle body to be baked; and the inherent temperature rise slope k of the baking zone is determined based on the actual drying oven model.

[0026] Step S102: Divide the heating process of the drying oven into multiple operating stages, and obtain the stage duration corresponding to each operating stage based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone. The operating stages include the heating stage of the baking zone. As an optional implementation, step S102 can be further divided into the following steps S1021 to S1023: Step S1021: Divide the heating process of the drying oven into a pre-purging stage, a combustion chamber heating stage, a baking zone heating stage, and a baking zone heat preservation stage. It should be noted that the automatic start-up process of the drying oven must follow strict procedures to ensure safe operation and accurate temperature control. The specific process is as follows: Since the oven temperature will naturally drop after the night shift shutdown, the automatic start-up system needs to initiate the heating program in advance to ensure smooth subsequent production. After startup, to prevent the accumulation of combustible gases and potential safety hazards, the burner will first undergo a pre-purging operation, during which the oven temperature will briefly drop. After pre-purging, the burner automatically ignites, and the combustion chamber begins to gradually heat up, followed by the synchronous heating of the metal heat exchanger connected to the combustion chamber. Once the metal heat exchanger reaches a certain temperature, the circulating fan drives air to circulate between the baking zone and the metal heat exchanger, efficiently transferring the heat generated by the burner to the baking zone, causing the temperature of the baking zone to rise steadily until the target temperature is reached. When the baking zone temperature reaches the target temperature, the burner will automatically reduce its output power and enter a constant temperature operation state, continuously stabilizing the baking zone temperature within the preset range to ensure that the drying process meets production requirements.

[0027] Therefore, based on the heating process of the drying oven, it can be divided into four stages: pre-purging, combustion chamber heating, baking zone heating, and baking zone heat preservation. Each stage has a standardized process and is connected in an orderly manner, as follows: In the pre-purging stage, the fan runs at a fixed speed for a period of time. Its core function is to disperse the combustible gases accumulated in the drying oven and eliminate safety hazards. During this process, the temperature of the baking zone will drop to a certain extent. After entering the combustion chamber heating stage, the burner is ignited and runs at the set power (usually the maximum power). The metal cylinder and metal heat exchanger around the flame heat up accordingly, and at the same time, the generated heat is transferred to the circulating air until a thermal equilibrium is reached. Then, the baking zone heating stage begins. The temperature of the baking zone will gradually rise under the action of heat transfer until the preset temperature (i.e., the target temperature of the baking zone) is reached. Finally, in the baking zone heat preservation stage, the burner will automatically reduce the output power to keep the baking zone stable at the set temperature, waiting for production to begin and the vehicle body to enter. The entire heating stage is standardized and orderly, which not only ensures operational safety but also lays a stable foundation for subsequent production.

[0028] Step S1022: Collect the duration of the first stage, the duration of the second stage, and the duration of the fourth stage corresponding to the pre-purge stage, the combustion chamber heating stage, and the baking zone heat preservation stage, respectively. It is understandable that, considering the heating process of the drying oven and the operating characteristics of the burners, the time patterns of its four heating stages can be clearly defined as follows: For each burner, the times for the three stages of pre-purging, combustion chamber heating, and baking zone heat preservation are fixed. Therefore, the duration of the first stage corresponding to these three stages can be directly obtained. Second phase duration and the duration of the fourth phase .

[0029] Step S1023: Calculate the duration of the third stage corresponding to the heating stage of the baking zone based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone.

[0030] Understandably, among the four heating stages, only the heating stage of the baking zone has a variable duration, depending on the difference between the initial temperature and the target temperature of the drying oven. Research has found that for a specific burner, the heating time of the baking zone is directly proportional to the temperature rise. By analyzing the heating curve, the corresponding slope can be calculated, and the system can then accurately calculate the heating time of the baking zone based on the difference between the initial temperature and the target temperature.

[0031] As an optional implementation, step S1023 can be further divided into the following steps S10231 to S10232: Step S10231: Calculate the difference between the target temperature of the baking zone and the initial temperature of the baking zone to obtain the first difference; Step S10232: Divide the first difference by the temperature rise slope of the baking zone to obtain the duration of the third stage.

[0032] Specifically, such as Figure 4 The schematic diagram of the drying oven's temperature rise curve shown demonstrates, through experimental verification, that the heating time and temperature increase are linearly proportional, which can be accurately calculated using the temperature difference. The calculation formula is as follows: ; in, This refers to the duration of the third stage corresponding to the heating phase in the baking zone. The first difference, The target temperature for the baking zone, The initial temperature of the baking zone is given by , and k is the inherent temperature rise slope of the baking zone in this type of drying oven, which can be obtained from the temperature rise curve fitting analysis.

[0033] It should be noted that the embodiments of this application employ a phased modeling method to analyze and calculate the heating process of the drying furnace, decomposing the complex nonlinear heating process into multiple controllable stages, thereby simplifying the handling of complex problems. For the main heating stage, curve fitting is performed using experimental or operational data to extract the heating law, and a mathematical model is established based on the fitting results, achieving precise quantitative calculation of the heating time.

[0034] Step S103: Determine the previous total heating time based on the stage duration, and then obtain the current duration adjustment value corresponding to the heating stage of the baking zone based on the previous total heating time and the target vehicle entry time. Specifically, since the pre-purging, combustion chamber heating, and baking zone holding stages have fixed times, and the baking zone heating time can be calculated using the above method, the total heating time of the drying oven is... The following formula can be used to calculate the value, thus providing a core basis for the precise control of the automatic start-up scheme: .

[0035] As an optional implementation, the step of obtaining the current duration adjustment value corresponding to the heating stage of the baking zone based on the previous total heating time and the target vehicle entry time can be further divided into the following steps S1031 to S1035: Step S1031: Obtain the previous duration adjustment value and the deviation elimination amount corresponding to the previous duration adjustment value; Step S1032: Determine the previous heating completion time based on the previous total heating time and the previous time adjustment value; Step S1033: Calculate the difference between the previous heating completion time and the target vehicle entry time to obtain the second difference; Step S1034: When the second difference is not zero, calculate the adjustment efficiency based on the previous time adjustment value and the deviation elimination amount; Specifically, obtain the actual drying time adjustment value from the previous drying cycle and record it as the previous time adjustment value. The deviation before and after adjustment are obtained, and the deviation before adjustment is subtracted from the deviation after adjustment to obtain the amount of deviation elimination. It is understandable that the system did not adjust the drying time during the current drying cycle, and the previous time adjustment value and deviation elimination amount were both 0.

[0036] The second difference is obtained based on the previous heating completion time and the target vehicle entry time. If the second difference A value greater than 0 indicates that the heating completion time of the previous drying cycle was later than the target vehicle entry time; if the second difference... A value less than 0 indicates that the heating completion time of the previous drying cycle was earlier than the target vehicle entry time; therefore, if the second difference... Not equal to 0 ( or All of these require adjustments to the start-up time to reduce the ineffective operating time of the drying oven and to ensure that the start-up sequence is precisely matched with production needs.

[0037] Step S1035: Based on the adjustment efficiency, the second difference is graded and corrected to obtain the current duration adjustment value corresponding to the heating stage of the baking zone.

[0038] It should be noted that traditional fixed-step adjustment methods (such as adjusting only 1 minute at a time) require many days to correct for large deviations. Therefore, the embodiments of this application calculate the adjustment efficiency. This system identifies the sensitivity of the system response and adjusts the correction step size of the startup time accordingly. When the system adjustment efficiency is low, the adjustment amount is automatically increased; when the system adjustment efficiency is high, fine-tuning is restored. This ensures that the system can approach the optimal startup time at the most reasonable speed under any operating condition, thereby significantly improving the accuracy and efficiency of startup time adjustment, enhancing system stability and reliability, and reducing the risk of abnormal fluctuations and equipment failures.

[0039] As an optional implementation, step S1034 can be further divided into the following steps S10341 to S10343: Step S10341: If the sign of the deviation elimination amount is inconsistent with the sign of the previous duration adjustment value, the adjustment effectiveness rate is set to zero and an early warning signal is generated. Step S10342: If the sign of the deviation elimination amount is consistent with the sign of the previous duration adjustment value, and the previous duration adjustment value is less than or equal to the preset minimum order value threshold, the adjustment effectiveness rate is set to one. Step S10343: If the sign of the deviation elimination amount is the same as the sign of the previous duration adjustment value, and the previous duration adjustment value is greater than the preset minimum order threshold, divide the deviation elimination amount by the previous duration adjustment value to obtain the adjustment efficiency.

[0040] In some optional embodiments, if the sign of the deviation elimination amount is inconsistent with the previous adjustment value, it indicates that the direction of deviation change is opposite to the expected adjustment direction. In this case, the drying oven may be malfunctioning, and therefore the efficiency will be adjusted. Set the value to zero and generate a warning signal, such as "Adjustment direction is opposite to expectation, please check system components"; if the deviation elimination amount has the same sign as the previous duration adjustment value, but the absolute value of the previous duration adjustment value is less than the preset minimum order value threshold (such as 0.5 seconds, 1 second), it is determined that the data volume is insufficient to support effective calculation, and the adjustment efficiency will be adjusted. Set to 1 and process according to the default gain; if the deviation elimination amount has the same sign as the previous duration adjustment value, and the absolute value of the previous duration adjustment value is greater than the preset minimum order of magnitude threshold, the adjustment efficiency is calculated normally using the following formula. : .

[0041] It should be noted that, according to the consistency of the sign between the deviation elimination amount and the historical duration adjustment value, as well as the magnitude of the absolute value of the historical duration adjustment value, the adjustment effectiveness is determined in different cases, which can ensure that a safer and more reasonable current duration adjustment value can be given under any circumstances.

[0042] Understandably, the minimum threshold can be set to other values ​​depending on the actual needs.

[0043] As an optional implementation, step S1035 can be further divided into the following steps S10351 to S10353: Step S10351: When the adjustment effectiveness rate is greater than or equal to the first preset value, determine the second difference value as the current duration adjustment value; Step S10352: When the adjustment efficiency is less than the first preset value and greater than the second preset value, determine the current duration adjustment value as the product of the second difference and the first graded correction value; Step S10353: When the adjustment efficiency is less than or equal to the second preset value, determine the current duration adjustment value as the product of the second difference and the second grade correction value; Among them, the first preset value is greater than the second preset value, and the first graded correction value is less than the second graded correction value.

[0044] In some alternative embodiments, when adjusting the efficiency When the value is greater than or equal to the first preset value (e.g., 0.9), it indicates that the system response is sensitive and the actual performance of the drying oven is highly consistent with expectations. In this case, the deviation between the previous heating completion time and the target vehicle entry time (i.e., the second difference) can be directly used. (This is used as the current duration adjustment value) For example, when the second difference This indicates that the previous heating cycle was completed 35 minutes later than the target vehicle entry time, requiring the machine to be started earlier. When the second difference This indicates that the previous heating cycle was completed 28 minutes earlier than the target vehicle start-up time, necessitating a delayed start-up. .

[0045] When adjustment is effective If the difference is less than the first preset value (e.g., 0.9) and greater than the second preset value (e.g., 0.5), it indicates that the system may have a certain degree of response lag due to factors such as slight aging of the furnace body. In this case, the second difference should be adjusted. Multiply by the first level correction value (e.g., 1.2) to obtain the current duration adjustment value. (like This allows for a moderate increase in adjustment efforts to compensate for efficiency losses.

[0046] When the adjustment efficiency is less than or equal to the second preset value (e.g., 0.5), it indicates that the system may be experiencing a significant slow response due to insufficient burner output, a significant decline in furnace insulation performance, or severe ash accumulation in the heat exchanger. The actual effect of each adjustment is less than half of the expected result. In this case, the second difference should be adjusted. Multiply by the second-level correction value (e.g., 1.6) to obtain the current duration adjustment value. (like This forces a larger adjustment range to ensure that the start-up time the next day can meet production needs, while the system issues an alarm signal to remind the equipment that preventive maintenance is required.

[0047] It is understandable that the first preset value, the second preset value, the first grade correction value, and the second grade correction value can be selected with other values ​​according to actual needs; among them, the first preset value is greater than the second preset value, and the first grade correction value is less than the second grade correction value.

[0048] Step S104: Determine the current start-up time based on the target arrival time, the previous total heating time, and the current time adjustment value, and then control the drying oven to start up and run at the current start-up time.

[0049] As an optional implementation, step S104 can be further divided into steps S1041 to S1042: Step S1041: Perform a summation operation on the previous total heating time, the previous time adjustment value, and the current time adjustment value to obtain the first sum. Step S1042: Perform a difference calculation between the target vehicle entry time and the first sum value to obtain the current startup time.

[0050] Specifically, the accurate calculation of the automatic start-up time of the drying oven is the core link in achieving precise control of the automatic start-up scheme. Its calculation logic is based on the coordinated matching of the previous total heating time and the production sequence, combined with multi-parameter quantitative analysis. The formula for calculating the automatic start-up time can be defined as: ; in, Indicates the current boot time. This indicates the time of vehicle entry, i.e., the timeline at which production officially begins. This represents the total time required for the drying oven to complete the entire heating process, specifically the sum of the previous total heating time and the previous time adjustment value.

[0051] The total heating time of the drying oven is the sum of the heating time of each heating stage and the current time adjustment value, and its quantitative expression is: .

[0052] Furthermore, to achieve precise control, process standardization, and convenient operation of the industrial baking system, all control logic of the automatic start-up control method for the drying oven in this embodiment relies on a programmable logic controller (PLC) as the core execution carrier. Through modular programming and collaborative operation with a user interface (GOT), an efficient and reliable closed-loop control system is constructed. Firstly, to meet the precise control requirements of the heating process in the baking zone, a dedicated function block is developed. The heating time calculation for all burners in the system uniformly calls this block, effectively ensuring the consistency of calculation standards and the accuracy of data, and avoiding errors caused by distributed programming.

[0053] To enhance system safety and process standardization, this embodiment also includes a startup preparation mode. After maintenance personnel complete on-site equipment inspection and confirm there are no safety hazards, they press the startup button. The system automatically switches to the startup preparation state, and the GOT human-machine interface simultaneously issues an alarm signal, clearly displaying "System preparing to start," allowing operators to monitor the system startup status in real time. To achieve visualized monitoring and convenient querying of operating parameters, the GOT human-machine interface dynamically displays the startup time of each burner in real time. Operators can quickly obtain equipment startup sequence information, providing data support for operational status analysis.

[0054] At the parameter setting level, the GOT human-machine interface enables centralized configuration of key parameters for the entire production process, including production start time, heating slope of each burner, and core process parameters such as pre-purge time, combustion chamber heating time, holding time, and adjustment time. This centralizes and standardizes parameter settings, reducing the probability of human error. Regarding ignition control, this embodiment optimizes and upgrades the main program, transforming the original unified ignition control mode into an individual ignition mode. Each burner completes its start-up and ignition operation sequentially based on the heating time calculated by the program block, effectively avoiding energy waste and equipment wear caused by unified ignition and improving the flexibility and accuracy of ignition control. Furthermore, the GOT human-machine interface includes a separate alarm output function for each burner upon completion of heating. When a single burner completes its heating process, the interface immediately issues an alarm, allowing operators to quickly confirm the accuracy of each burner's heating completion and ensuring the orderly progress of the baking process.

[0055] To address the industrial baking system upgrade task, and in order to standardize control processes and improve system operational stability and energy efficiency, this application embodiment also constructs a new standardized workflow to achieve orderly connection and precise control of each link after the upgrade. First, during the system startup phase, maintenance personnel must complete a full-process inspection of the equipment according to preset inspection standards, focusing on checking the operating status of key equipment such as burners, pipelines, and detection elements. After confirming that there are no abnormalities or potential hazards, the start button is triggered, and the system immediately switches to the ready-to-start mode, laying a safe foundation for the subsequent startup process.

[0056] In the equipment startup control phase, each burner automatically and cyclically calculates its startup sequence according to a preset algorithm. The calculation results are synchronized in real time to the GOT human-machine interface and displayed visually, facilitating operators to monitor the startup sequence parameters of each burner in real time and providing data support for process management. When the calculated startup time is reached, the system will automatically trigger the startup command of the corresponding burner, achieving orderly startup of each burner and avoiding energy loss and equipment failure caused by chaotic startup sequences.

[0057] After the burners complete the heating process, the GOT human-machine interface will immediately issue an alarm signal, accurately reflecting the heating status of each burner, allowing operators to quickly confirm the heating effect. Simultaneously, the system incorporates a closed-loop optimization mechanism. By comparing the deviation between the actual heating time and the target heating time, it automatically optimizes and adjusts time parameters to improve the accuracy of heating control. If an operator accidentally presses the start button and enters the preparation stage, they can safely exit the startup process using a dedicated release button, effectively preventing abnormal equipment startup caused by misoperation and improving system fault tolerance and operational safety. Furthermore, the drying oven technician must check the system's startup status daily, dynamically adjusting the holding time parameters based on the accuracy of the heating time, further optimizing energy distribution, achieving energy-saving and consumption-reducing transformation goals, and ensuring the long-term efficient and stable operation of the system.

[0058] The automatic start-up control method for a drying oven according to embodiments of this application has been described above. It can be recognized that, compared with existing drying oven start-up methods, embodiments of this application have the following advantages: First, a phased modeling method is adopted to analyze and calculate the heating process of the drying furnace, decomposing the complex nonlinear heating process into multiple controllable stages to simplify the handling of complex problems. For the main heating stage, curve fitting is performed through experimental or operational data to extract the heating law, and a mathematical model is established based on the fitting results to achieve accurate quantitative calculation of heating time.

[0059] Second, based on the consistency of the sign between the deviation elimination amount and the historical duration adjustment value, as well as the magnitude of the absolute value of the historical duration adjustment value, the adjustment effectiveness is determined according to different situations, which can ensure that a safer and more reasonable current duration adjustment value can be given under any circumstances.

[0060] Third, by calculating the adjustment efficiency, the sensitivity of the system response is identified, and the correction step size of the startup time is adjusted accordingly. This allows the system to approach the optimal startup time at the most reasonable speed under any operating condition, thereby greatly improving the accuracy and efficiency of startup time adjustment, enhancing the stability and reliability of system operation, and reducing the risk of abnormal fluctuations and equipment failures.

[0061] Fourth, based on the target entry time, the previous total heating time, the previous time adjustment value, and the current time adjustment value, the optimal start-up time is automatically calculated, which can improve the control accuracy and adaptability of the start-up time of the drying oven, reduce the ineffective running time of the drying oven, and ultimately realize the automated start-up control of the drying oven, save energy and reduce manual management costs.

[0062] Fifth, the original synchronous start-up mode of multiple burners in the drying oven is optimized into an independent start-stop control mode for each combustion unit; each burner can be put into operation independently according to process requirements and operating conditions, which significantly improves the system's operational flexibility and control capability, and avoids energy waste such as dry burning and ineffective combustion from the control logic.

[0063] VI. A dedicated start-up preparation stage is added to build a dual guarantee mechanism that combines manual inspection and automatic start-up; manual safety confirmation and system self-check are completed before the equipment is officially started, so as to comprehensively improve the safety and reliability of equipment operation while maximizing energy saving and consumption reduction.

[0064] Reference Figure 5 This application also provides an automatic start-up control device for a drying oven, comprising: The parameter acquisition module is used to acquire the target entry time, the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone. The stage duration calculation module is used to divide the heating process of the drying oven into multiple operating stages, and obtain the stage duration corresponding to each operating stage based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone. The operating stages include the heating stage of the baking zone. The duration adjustment value determination module is used to determine the previous total heating duration based on the stage duration, and then obtain the duration adjustment value corresponding to the heating stage of the baking zone based on the previous total heating duration and the target vehicle entry time. The start-up control module is used to determine the current start-up time based on the target arrival time, the previous total heating time, and the time adjustment value, and then control the drying oven to start up and run at the current start-up time.

[0065] It is understood that the content of the above method embodiments is applicable to the present device embodiments. The specific functions implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0066] This application also provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described method. This electronic device can be any smart terminal, including tablet computers, in-vehicle computers, etc.

[0067] It is understood that the content of the above method embodiments is applicable to this device embodiment. The specific functions implemented by this device embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0068] Please see Figure 6 , Figure 6 The hardware structure of an electronic device according to another embodiment is illustrated. The electronic device includes: The processor 1001 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application. The memory 1002 can be implemented as a read-only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM). The memory 1002 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1002 and is called and executed by the processor 1001 using the methods described in the embodiments of this application. Input / output interface 1003 is used to implement information input and output; The communication interface 1004 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.). Bus 1005 transmits information between various components of the device (e.g., processor 1001, memory 1002, input / output interface 1003, and communication interface 1004); The processor 1001, memory 1002, input / output interface 1003 and communication interface 1004 are connected to each other within the device via bus 1005.

[0069] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.

[0070] It is understood that the content of the above method embodiments is applicable to this storage medium embodiment. The specific functions implemented in this storage medium embodiment are the same as those in the above method embodiments, and the beneficial effects achieved are also the same as those achieved in the above method embodiments.

[0071] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0072] It is understood that the content of the above method embodiments is applicable to the embodiments of this program product. The specific functions implemented by the embodiments of this program product are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0073] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0074] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0075] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0076] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0077] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0078] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0079] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0080] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0081] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0082] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0083] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0084] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A method for automatically starting an oven, characterized by, Includes the following steps: Acquire the target vehicle entry time, initial temperature of the baking zone, target temperature of the baking zone, and temperature rise slope of the baking zone; The heating process of the drying oven is divided into multiple operating stages, and the duration of each operating stage is obtained according to the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone. The operating stage includes the heating stage of the baking zone. The previous total heating time is determined based on the stage duration, and then the current duration adjustment value corresponding to the heating stage of the baking zone is obtained based on the previous total heating time and the target vehicle entry time. Based on the target vehicle entry time, the previous total heating time, and the current duration adjustment value, the current start-up time is determined, and then the drying oven is controlled to start up and run at the current start-up time.

2. The method of claim 1, wherein, The process of heating the drying oven is divided into multiple operating stages, and the duration of each operating stage is obtained based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone. Specifically, this includes: The heating process of the drying oven is divided into a pre-purging stage, a combustion chamber heating stage, a baking zone heating stage, and a baking zone heat preservation stage. The durations of the first stage, the second stage, and the fourth stage corresponding to the pre-purge stage, the combustion chamber heating stage, and the baking zone heat preservation stage are collected respectively. The duration of the third stage corresponding to the heating stage of the baking zone is calculated based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone.

3. The method of claim 2, wherein, The calculation of the duration of the third stage corresponding to the heating stage of the baking zone based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone specifically includes: The first difference is obtained by calculating the difference between the target temperature of the baking zone and the initial temperature of the baking zone. The duration of the third stage is obtained by dividing the first difference by the temperature rise slope of the baking zone.

4. The method according to claim 1, characterized in that, The step of obtaining the current duration adjustment value corresponding to the heating stage of the baking zone based on the previous total heating time and the target vehicle entry time specifically includes: Obtain the previous duration adjustment value and the deviation elimination amount corresponding to the previous duration adjustment value; The previous heating completion time is determined based on the previous total heating time and the previous time adjustment value. The difference between the previous heating completion time and the target vehicle entry time is calculated to obtain the second difference. When the second difference is not zero, the adjustment efficiency is calculated based on the previous duration adjustment value and the deviation elimination amount; The second difference is graded and corrected according to the adjustment efficiency to obtain the current duration adjustment value corresponding to the heating stage of the baking zone.

5. The method according to claim 4, characterized in that, The step of calculating the adjustment effectiveness based on the previous duration adjustment value and the deviation elimination amount specifically includes: If the sign of the deviation elimination amount is inconsistent with the sign of the previous duration adjustment value, the adjustment effectiveness is set to zero and an early warning signal is generated; If the sign of the deviation elimination amount is the same as the sign of the previous duration adjustment value, and the previous duration adjustment value is less than or equal to a preset minimum order value threshold, the adjustment effectiveness rate is set to one. If the sign of the deviation elimination amount is the same as the sign of the previous duration adjustment value, and the previous duration adjustment value is greater than a preset minimum threshold, the deviation elimination amount and the previous duration adjustment value are divided to obtain the adjustment efficiency.

6. The method according to claim 4, characterized in that, The step of performing graded correction on the second difference based on the adjustment effectiveness to obtain the current duration adjustment value corresponding to the heating stage of the baking zone specifically includes: When the adjustment effectiveness rate is greater than or equal to the first preset value, the second difference is determined to be the current duration adjustment value; When the adjustment efficiency is less than the first preset value and greater than the second preset value, the current duration adjustment value is determined to be the product of the second difference and the first graded correction value. When the adjustment effectiveness is less than or equal to the second preset value, the current duration adjustment value is determined to be the product of the second difference and the second graded correction value. Wherein, the first preset value is greater than the second preset value, and the first graded correction value is less than the second graded correction value.

7. The method according to claim 4, characterized in that, The step of determining the current start-up time based on the target vehicle entry time, the previous total heating time, and the current duration adjustment value specifically includes: The sum of the previous total heating time, the previous time adjustment value, and the current time adjustment value is calculated to obtain the first sum. The current startup time is obtained by performing a difference operation between the target vehicle entry time and the first sum.

8. An automatic start-up control device for a drying oven, characterized in that, include: The parameter acquisition module is used to acquire the target entry time, the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone. The stage duration calculation module is used to divide the heating process of the drying oven into multiple operating stages, and to obtain the stage duration corresponding to each operating stage based on the initial temperature of the baking zone, the target temperature of the baking zone, and the temperature rise slope of the baking zone. The operating stage includes the heating stage of the baking zone. The duration adjustment value determination module is used to determine the previous total heating duration based on the stage duration, and then obtain the current duration adjustment value corresponding to the heating stage of the baking zone based on the previous total heating duration and the target vehicle entry time. The start-up control module is used to determine the current start-up time based on the target vehicle entry time, the previous total heating time, and the current duration adjustment value, and then control the drying oven to start up and run at the current start-up time.

9. An electronic device, characterized in that, The electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method of any one of claims 1 to 7.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 7.

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