Temperature control method and system for automatic production line of baking varnish door

Abstract

The invention provides a temperature control method and system for an automatic production line of a varnish-baking door. According to the method, a three-dimensional thermal field model including position coordinates, temperature difference values and area proportions is generated by dynamically scanning marching door body surface temperature distribution data; thirdly, a three-layer air duct system with the top, the middle and the bottom independently adjusted is constructed, the rotation angle and the airflow intensity of the flow guide plate of the corresponding layer are dynamically adjusted, and an airflow covering mode matched with the door body curved surface is formed; when the area proportion of the abnormal region exceeds the standard, the opening degree of an air door is adjusted, and a compensation air volume increment coefficient is synchronously calculated to generate a hierarchical compensation instruction; finally, the heat dissipation intensity is adjusted through an increment coefficient, and a directional heat dissipation loop is formed by cooperating with flow guide plate angle correction and a static pressure box vortex suppression device. According to the technical scheme provided by the invention, dynamic sensing of temperature abnormity in the curing process of the special-shaped door plate, multi-level airflow accurate compensation and closed-loop control of over-temperature protection are realized, and the curing uniformity and quality stability of a paint surface are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent temperature control in industrial automation manufacturing, and in particular to a temperature control method and system for an automatic production line of painted doors. BACKGROUND

[0002] In the automatic production line of painted doors, it is necessary to ensure that the painted surface after spraying is evenly heated in the curing oven to avoid defects such as bubbles, color difference or insufficient adhesion caused by local temperature differences. The core of the technical requirement is to realize dynamic temperature control for the complex geometric features of the door panel, to match the heat capacity characteristics of different areas in real time, and to accurately control the heating power to make the paint curing rate consistent. However, the geometric complexity of the special-shaped door panel significantly aggravates the uncontrollability of the heat field distribution - the curved surface area is prone to high temperature aggregation due to differences in heat convection, and the concave or edge area is prone to low temperature stagnation due to heat conduction resistance; at the same time, the change of the door panel material or thickness leads to the difference of thermal inertia, and the traditional temperature control system is difficult to adapt to the dynamic thermal load synchronously, which finally leads to the fluctuation of curing quality, energy waste and yield reduction.

[0003] At present, the mainstream scheme for this requirement is a dynamic temperature control system based on infrared thermal imaging. The system scans the temperature distribution of the door panel surface in real time through multi-angle infrared cameras, generates a heat field map combined with a three-dimensional modeling algorithm, and dynamically divides the temperature control area based on the map to drive the heating module to adjust the power in different zones. SUMMARY

[0004] The present application provides a temperature control method and system for an automatic production line of painted doors to solve the problem of inaccurate temperature measurement due to the interference of paint surface reflection in the prior art.

[0005] In a first aspect, the present application provides a temperature control method for an automatic production line of painted doors, comprising:

[0006] Real-time scanning of temperature distribution data on the surface of the door body in motion, identifying abnormal areas where the temperature difference exceeds the set range by synchronously eliminating motion collection bias, and generating a three-dimensional heat field model containing position coordinates, temperature difference values and area proportion based on the temperature distribution data;

[0007] A three-layer air duct system with independent adjustment of the top, middle and bottom is constructed, and a static pressure box is arranged at the end of each layer of air duct to eliminate internal pressure fluctuations. The output end of the static pressure box is configured with a rotatable deflector, and the rotation angle and air flow intensity of the corresponding level deflector are dynamically adjusted according to the position coordinates and temperature difference values in the three-dimensional heat field model to form an air flow coverage mode matching the door body surface.

[0008] When the area ratio of the abnormal area exceeds the set ratio, the corresponding air duct damper opening is adjusted according to the hierarchical position based on the airflow coverage mode, and the incremental coefficient of the compensation air volume is calculated in combination with the temperature difference amplitude, and a hierarchical compensation instruction is generated based on the incremental coefficient of the compensation air volume;

[0009] According to the execution status of the hierarchical compensation instruction and the changing trend of the incremental coefficient of the compensation air volume, when the temperature difference value of the specific position coordinates in the three-dimensional thermal field model exceeds the safety threshold, the corresponding heating source is cut off and the heat dissipation is switched to the redundant cooling channel. At the same time, based on the incremental coefficient of the compensation air volume, the heat dissipation intensity of the redundant channel is adjusted, and a directional heat dissipation loop is formed through the synchronous correction of the guide plate angle and the coordinated action of the vortex suppression device in the static pressure box.

[0010] Optionally, a tapered cross-section structure is provided in the top air duct, an expandable blade array is installed in the middle air duct, and a negative pressure adsorption component is connected to the end of the bottom air duct to construct a three-layer air duct system with independent adjustment of the top, middle and bottom parts;

[0011] The output end of each layer of air duct is connected to the pressure balancing unit, and the honeycomb flow resistance component in the pressure balancing unit is used to eliminate the pressure fluctuation inside the air duct;

[0012] A direction adjustment unit is installed at the output end of the pressure balance unit, and a deflection angle of the direction adjustment unit is calculated according to the position coordinates of the abnormal area in the three-dimensional thermal field model, and the output airflow intensity of the direction adjustment unit is dynamically adjusted according to the amplitude of the temperature difference;

[0013] Through the combined effect of the deflection angle of the direction adjustment unit and the output airflow intensity, an airflow coverage pattern that matches the curved surface of the door body is formed.

[0014] Optionally, a direction adjustment unit is installed at the output end of the pressure balance unit, and the position coordinates of the abnormal area in the three-dimensional thermal field model are extracted by a position analysis module to generate a deflection angle control parameter that matches the curvature of the door surface;

[0015] The amplitude of the temperature difference value is input into the intensity distribution module, and the adjustment proportional coefficient of the output airflow intensity is calculated based on the proportional relationship between the temperature difference value and the preset reference value;

[0016] The servo drive unit receives the deflection angle control parameter and the adjustment proportional coefficient, and synchronously controls the mechanical deflection angle and the output airflow pressure value of the direction adjustment unit;

[0017] A feedback compensation loop is set between the direction adjustment unit and the pressure balance unit. According to the real-time monitored airflow coverage uniformity and the amplitude change trend of the temperature difference, the deflection angle control parameter and the adjustment proportional coefficient are dynamically corrected to achieve dynamic adjustment of the output airflow intensity.

[0018] Optionally, the execution state of the hierarchical compensation instruction and the incremental coefficient variation trend of the compensation air volume are monitored in real time, and when the incremental coefficient variation rate of the hierarchical compensation instruction exceeds a set threshold, a pre-warning detection mode is activated;

[0019] In the pre-warning detection mode, boundary tracking is performed on the coordinate region in the three-dimensional thermal field model whose temperature difference value continuously exceeds the standard, and when the area expansion rate of the tracked region exceeds a set safety threshold, a protection response is triggered;

[0020] The power supply loop of the heating source corresponding to the target coordinate region is cut off through a multi-path switching unit, and the redundant cooling channel and the main air duct system are switched to a parallel heat dissipation mode;

[0021] During the heat dissipation mode switching process, the heat dissipation intensity of the redundant cooling channel is adjusted based on the incremental coefficient of the current compensation air volume, the current rotation angle data of the deflector is synchronously called, and the angle of the deflector is corrected according to the coordinate position of the target region to adjust the direction of the heat dissipation airflow;

[0022] The vortex suppression device in the static pressure tank is synchronously activated to eliminate pressure sudden changes in the airflow path, and through the timing coordination control of the deflector angle correction and the vortex suppression device, the heat dissipation airflow forms a directional circulation loop along the surface curvature of the door body.

[0023] Optionally, the current rotation angle data of the deflector is called, and based on the geometric relationship between the current rotation angle data and the coordinate position of the target region, the reference angle of the spoiler array in the vortex suppression device is directly calculated;

[0024] The spoiler array in the vortex suppression device is activated, and based on the reference angle of the spoiler array, the deployment angle of each spoiler in the array is adjusted to eliminate the pressure sudden changes in the heat dissipation airflow path related to the deflector angle;

[0025] The current rotation angle data of the deflector and the spoiler deployment angle are input into a timing coordination control unit to generate a coordination control instruction that changes synchronously with the surface curvature of the door body, and the deflector angle correction action and the spoiler deployment action of the vortex suppression device are synchronously controlled;

[0026] Through periodic iteration of the coordination control instruction, the direction of the heat dissipation airflow is always dynamically matched with the current rotation angle of the deflector, and through compensation adjustment of the spoiler deployment angle, airflow separation is suppressed.

[0027] Optionally, through the dynamic tracking module installed on the side of the conveying track, the surface temperature data is collected by the thermal imaging scanning unit in a pulse trigger mode synchronously with the door body advancing speed;

[0028] The continuously collected surface temperature data is input into the space conversion unit, and the motion distortion correction of the scanned data is performed through the speed feedback signal of the dynamic tracking module to generate temperature distribution data that matches the geometric shape of the door surface;

[0029] Dividing the temperature distribution data into hierarchical detection areas, calculating the temperature difference fluctuation amplitude according to the degree of dispersion of the temperature values ​​within the hierarchical detection areas, screening out areas where the temperature difference fluctuation amplitude exceeds a set threshold and marking them as abnormal areas;

[0030] The position coordinates, temperature difference value and area ratio of the abnormal area are input into the three-dimensional modeling unit, and a three-dimensional thermal field model consistent with the curvature of the door surface is generated through geometric transformation of the coordinate system.

[0031] Optionally, when the area ratio of the abnormal area exceeds a set ratio, a spatial adjustment priority sequence of the target air duct is determined according to the correspondence between the hierarchical position and the door surface in the airflow coverage pattern;

[0032] Based on the space adjustment priority sequence, the damper opening of the target air duct is adjusted in stages. In the first stage, the basic opening value is linearly adjusted according to the area ratio. In the second stage, the incremental coefficient of the compensation air volume is calculated according to the product of the temperature difference amplitude and the basic opening value.

[0033] The incremental coefficient of the compensation air volume is input into the compensation decision unit, and a hierarchical compensation instruction including a target air duct identifier, a compensation air volume value and an execution sequence is generated through a preset hierarchical association rule in the compensation decision unit.

[0034] In a second aspect, the present application provides a temperature control system for an automated production line of painted doors, comprising:

[0035] The acquisition module scans the temperature distribution data of the door body in real time while it is moving. It identifies abnormal areas where the temperature difference exceeds the set range by synchronously eliminating the motion acquisition deviation. Based on the temperature distribution data, it generates a three-dimensional thermal field model containing position coordinates, temperature difference values ​​and area ratios.

[0036] Elimination module, constructing a three-layer air duct system with independently adjustable top, middle and bottom parts. A static pressure box is set at the end of each layer of air duct to eliminate internal pressure fluctuations. The output end of the static pressure box is equipped with a rotatable guide plate. The rotation angle and airflow intensity of the guide plate at the corresponding layer are dynamically adjusted according to the position coordinates and temperature difference values ​​in the three-dimensional thermal field model to form an airflow coverage pattern that matches the curved surface of the door body;

[0037] a compensation module, when the area ratio of the abnormal area exceeds a set ratio, adjusting the corresponding air duct damper opening according to the hierarchical position based on the airflow coverage pattern, calculating the incremental coefficient of the compensation air volume in combination with the temperature difference amplitude, and generating a hierarchical compensation instruction based on the incremental coefficient of the compensation air volume;

[0038] The correction module, based on the execution status of the hierarchical compensation instruction and the changing trend of the incremental coefficient, cuts off the corresponding heating source and switches to the redundant cooling channel for heat dissipation when the temperature difference value of the specific position coordinates in the three-dimensional thermal field model exceeds the safety threshold. At the same time, the heat dissipation intensity of the redundant channel is adjusted based on the incremental coefficient of the compensation air volume, and a directional heat dissipation loop is formed through the synchronous correction of the guide plate angle and the coordinated action of the vortex suppression device in the static pressure box.

[0039] In a third aspect, an embodiment of the present application provides a computing device comprising a processing component and a storage component; the storage component stores one or more computer instructions; the one or more computer instructions are used to be called and executed by the processing component to implement a temperature control method for an automated production line of painted doors as described in the first aspect above.

[0040] In a fourth aspect, an embodiment of the present application provides a computer storage medium storing a computer program. When the computer program is executed by a computer, it implements a temperature control method for an automated production line of painted doors as described in the first aspect.

[0041] In the embodiment of the present application, the temperature distribution data of the surface of the moving door body is scanned in real time, and the abnormal area where the temperature difference exceeds the set range is identified by synchronously eliminating the motion acquisition deviation, and a three-dimensional thermal field model including the position coordinates, temperature difference value and area ratio is generated based on the temperature distribution data; a three-layer air duct system with independent adjustment at the top, middle and bottom is constructed, and a static pressure box is set at the end of each layer of the air duct to eliminate internal pressure fluctuations. A rotatable guide plate is configured at the output end of the static pressure box, and the rotation angle and airflow intensity of the guide plate of the corresponding layer are dynamically adjusted according to the position coordinates and temperature difference values ​​in the three-dimensional thermal field model to form an airflow coverage pattern that matches the curved surface of the door body; when the area of ​​the abnormal area When the proportion exceeds the set proportion, the corresponding air duct damper opening is adjusted according to the hierarchical position based on the airflow coverage mode, and the incremental coefficient of the compensation air volume is calculated in combination with the temperature difference amplitude, and the hierarchical compensation instruction is generated based on the incremental coefficient of the compensation air volume; according to the execution status of the hierarchical compensation instruction and the change trend of the incremental coefficient of the compensation air volume, when the temperature difference value of the specific position coordinate in the three-dimensional thermal field model exceeds the safety threshold, the corresponding heating source is cut off and switched to the redundant cooling channel for heat dissipation, and the heat dissipation intensity of the redundant channel is adjusted based on the incremental coefficient of the compensation air volume, and a directional heat dissipation loop is formed through the synchronous correction of the guide plate angle and the synergistic effect of the vortex suppression device in the static pressure box.

[0042] This application has the following beneficial effects:

[0043] Through real-time dynamic scanning and three-dimensional thermal field modeling technology, abnormal temperature areas during the curing process of special-shaped door panels can be accurately identified. Combined with the three-layer air duct system with independent layer adjustment and the dynamic control mechanism of the guide plate, adaptive matching of the airflow coverage pattern and the door surface shape is achieved, significantly improving the uniformity of paint film curing; based on the multi-level compensation control strategy of the area ratio of abnormal areas and the temperature difference amplitude, the air volume distribution efficiency can be dynamically optimized to effectively avoid local overheating or underheating defects; through the coordinated control of redundant cooling channels and directional heat dissipation loops, while ensuring the temperature safety threshold, production continuity and process stability are maintained, ultimately achieving the technical effect of improving the surface quality consistency of painted doors, reducing energy consumption and scrap rate.

[0044] Furthermore, when constructing a three-layer independently adjustable air duct system, the top air duct adopts a tapered cross-section structure to accelerate the airflow, the middle air duct adjusts the airflow direction through an expandable blade array, and the bottom air duct is combined with a negative pressure adsorption component to enhance the airflow stability; the honeycomb flow resistance component of the pressure balancing unit eliminates the pressure fluctuations of each layer of the air duct, and controls the deflection angle and airflow intensity output of the direction adjustment unit according to the position coordinates and temperature difference of the abnormal area in the three-dimensional thermal field model, forming an airflow coverage pattern that is highly adapted to the door body curve. Through the differentiated design of the tapered structure, blade array and negative pressure adsorption component, the adaptability of each layer of air duct to the airflow of the special-shaped door body curve is enhanced; the synergistic effect of the pressure balancing unit and the direction adjustment unit realizes the precise control of airflow intensity and angle, effectively improving the positioning accuracy of temperature compensation; the dynamically matched airflow coverage pattern can significantly reduce the airflow scattering loss, form a stable temperature control field in the complex curved surface area, reduce the paint curing defect rate, and improve the thermal energy utilization efficiency.

[0045] These and other aspects of the present application will become more readily apparent from the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0047] Figure 1 A flow chart of a temperature control method for an automated production line for paint-coated doors provided by the present application is shown;

[0048] Figure 2 A scene diagram showing a temperature control method for an automated production line of paint-baked doors provided by the present application is shown;

[0049] Figure 3 The following is a schematic diagram showing the structure of a temperature control system for an automated production line of paint-baked doors provided by the present application;

[0050] Figure 4 A schematic structural diagram of a computing device provided by the present application is shown. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0052] In some of the processes described in the specification and claims of this application and the above-mentioned figures, multiple operations that appear in a specific order are included, but it should be clearly understood that these operations may not be executed in the order in which they appear in this document or may be executed in parallel. The serial numbers of the operations, such as 101, 102, etc., are only used to distinguish between different operations, and the serial numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations may be executed in sequence or in parallel. It should be noted that the descriptions of "first", "second", etc. in this document are used to distinguish different messages, devices, modules, etc., and do not represent a sequential order, nor do they limit "first" and "second" to being different types.

[0053] In the automated production of paint for special-shaped door panels, traditional temperature control systems rely on fixed zone heating or static air duct adjustment, making it difficult to adapt to the dynamic thermal field changes caused by the complex geometric features of the door panels. Specifically, high temperatures accumulate in curved areas due to uneven airflow coverage, and low temperatures stagnate in recessed or edge areas due to differences in heat conduction efficiency. Combined with thermal inertia fluctuations caused by differences in door material and thickness, existing solutions are unable to accurately match dynamic heat load requirements, resulting in poor paint curing uniformity, redundant energy consumption, and limited yield. Although the dynamic temperature control system based on infrared thermal imaging has partially alleviated the above problems through temperature zone adjustment, its mode of relying solely on heating power adjustment still has defects such as response lag and low energy utilization. In particular, it cannot solve the problem of dynamic matching between the curved surface of special-shaped door panels and the airflow pattern.

[0054] In response to the above problems, this application proposes a temperature control method for an automated production line of paint-baked doors. By constructing a three-dimensional thermal field model through real-time scanning, and combining a layered independently controlled air duct system with a dynamic compensation strategy, precise temperature control of the curing process of special-shaped door panels is achieved. Specifically, based on the position coordinates and temperature difference values ​​of the three-dimensional thermal field model, the angles and airflow intensities of the multi-layer guide plates are dynamically adjusted to form an airflow coverage pattern that is highly adapted to the curved surface of the door body; through a multi-level compensation mechanism of the area proportion of the abnormal area and the temperature difference amplitude, the air volume distribution efficiency is simultaneously optimized; and the coordinated control of redundant cooling channels and directional heat dissipation circuits is introduced to ensure rapid response and thermal field balance in over-temperature areas. This method effectively solves the temperature deviation problem caused by airflow-surface mismatch in traditional technologies, significantly improves the uniformity of paint film curing, thermal energy utilization and process stability, and provides a reliable technical guarantee for the high-quality production of special-shaped door panels.

[0055] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0056] Figure 1 A flow chart of a temperature control method for an automated production line of paint-coated doors is provided for the embodiment of the present application. Figure 1 As shown, the method includes:

[0057] 101. Scan the temperature distribution data of the door surface in real time while it is moving, identify abnormal areas where the temperature difference exceeds the set range by synchronously eliminating motion acquisition deviation, and generate a three-dimensional thermal field model containing position coordinates, temperature difference values, and area ratios based on the temperature distribution data;

[0058] Optionally, step 101 may specifically include the following steps:

[0059] 1011. The dynamic tracking module installed on the side of the conveyor track is synchronized with the door body's travel speed to control the thermal imaging scanning unit to collect surface temperature data in a pulse trigger mode;

[0060] 1012. Input the continuously collected surface temperature data into the space conversion unit, perform motion distortion correction on the scanned data using the speed feedback signal of the dynamic tracking module, and generate temperature distribution data that matches the geometric shape of the door surface;

[0061] 1013. Divide the temperature distribution data into hierarchical detection areas, calculate the temperature difference fluctuation amplitude based on the degree of temperature dispersion within the hierarchical detection areas, and screen out areas where the temperature difference fluctuation amplitude exceeds a set threshold and mark them as abnormal areas;

[0062] 1014. Input the position coordinates, temperature difference value and area ratio of the abnormal area into the three-dimensional modeling unit, and generate a three-dimensional thermal field model consistent with the curvature of the door surface through geometric transformation of the coordinate system.

[0063] In the above steps, the dynamic tracking module refers to a sensor device installed on the side of the conveyor track and synchronized with the door's travel speed, which is used to obtain the door's movement speed in real time; the thermal imaging scanning unit refers to a device that collects surface temperature data through an infrared detector, and uses a pulse trigger mode to achieve non-continuous sampling; the pulse trigger mode refers to an intermittent trigger mechanism that dynamically adjusts the data acquisition frequency according to the door's movement speed; the spatial conversion unit refers to a signal processor that converts time-series temperature data into spatially distributed data, and eliminates the image smear effect caused by door movement through motion distortion correction; the hierarchical detection area refers to a grid detection unit divided based on the door's structural characteristics, each unit containing a fixed area of ​​the door's surface; the temperature difference fluctuation amplitude refers to the difference between the highest temperature and the lowest temperature in the same detection unit; the three-dimensional modeling unit refers to a graphics processing module that maps plane temperature data to a three-dimensional surface through geometric transformation.

[0064] In the embodiment of the present application, first, the pulse signal of the conveyor track encoder is received by the dynamic tracking module in step 1011, and the door travel speed value is analyzed in real time; secondly, the pulse trigger interval of the thermal imaging scanning unit is dynamically adjusted according to the speed value. When the speed is increased to 2m / s, the trigger interval is shortened to 50ms, and when the speed is reduced to 0.5m / s, the trigger interval is extended to 200ms; then, the infrared focal plane array detector of the thermal imaging scanning unit is controlled to collect instantaneous thermal radiation data in a pulse trigger mode, and each trigger obtains a single-frame thermal image with a resolution of 640×480 pixels; finally, the discrete temperature data with timestamps are integrated into a time series data set in the trigger order to complete the pulse data acquisition synchronized with the door movement.

[0065] Secondly, through step 1012, the time-series temperature data set output by the thermal imaging scanning unit is input into the space conversion unit, and the instantaneous velocity vector and acceleration data of the door body provided by the dynamic tracking module are synchronously received; secondly, a space-time conversion matrix is ​​constructed in the space conversion unit, and the displacement compensation amount of the data point corresponding to each timestamp is calculated according to the formula, where the displacement amount is determined by the integral relationship between the velocity and the acceleration; then, the compensated discrete data points are spatially reconstructed through the bilinear interpolation algorithm to eliminate the image smear effect caused by the variable speed movement of the door body; finally, a two-dimensional temperature distribution map that strictly corresponds to the geometric shape of the door body surface is generated, and spatial matrix data containing XY coordinates and temperature values ​​is output.

[0066] Next, step 1013 is used to divide the hierarchical detection areas on the two-dimensional temperature distribution map according to the layout of the door body reinforcement ribs, and each detection area covers a rectangular range of 1.5m×0.8m; secondly, the temperature data set in each area is statistically analyzed, and the temperature extreme difference and standard deviation are calculated respectively. The temperature extreme difference is defined as the difference between the highest temperature and the lowest temperature in the area; then, the area where the temperature extreme difference exceeds 15°C or the standard deviation exceeds 5°C is judged as the temperature difference fluctuation amplitude exceeding the standard; finally, the boundary coordinates, maximum temperature difference value and area ratio parameters of the exceeding area are extracted to generate an abnormal area feature description file containing the location, temperature difference and coverage area.

[0067] Finally, through step 1014, the two-dimensional coordinate data in the abnormal area feature description file is input into the three-dimensional modeling unit, and the surface parameter equation provided by the door body CAD model is called; secondly, the plane coordinates are mapped to the three-dimensional surface through the non-uniform rational B-spline algorithm, and the three-dimensional coordinate points after curvature compensation are calculated; then different color gradients are assigned according to the temperature difference value, and the area ratio parameters are converted into the density distribution of the three-dimensional grid; finally, a three-dimensional thermal field model consistent with the curvature of the door body surface is generated, and the temperature difference and coverage range of the abnormal area are intuitively displayed through the color gradient and grid density.

[0068] In practical applications, for example, on a spray-curing production line for special-shaped door panels, when a 2.4-meter-long, 0.8-meter-radius-of-curvature metal door passes through a 185°C curing oven at 0.6 m / s, the system initiates dynamic temperature control. Three VOC infrared thermal imagers with a 25Hz frame rate are deployed 1.2 meters to the side of the conveyor track. Their servo pan / tilts adjust the scanning angle in real time based on the door surface curvature, triggering pulse scans at 50ms intervals within a ±45° rotation range to simultaneously eliminate the 0.3mm image artifacts caused by door movement. The collected raw temperature data is matched to the door CAD model with 0.05mm spatial coordinate accuracy using a B-spline surface fitting algorithm. An additional 2°C emissivity compensation is applied to grooves deeper than 15mm. The system divides the door surface into a 20mm×20mm detection grid. An abnormal area is identified when the temperature difference between adjacent grid cells exceeds 4°C for three seconds, or when the temperature of a single grid cell deviates by ±5°C from the set value. After detecting a 0.35 square meter low-temperature zone in the waved area at the top of the door, the 3D modeling engine generated a 3D thermal map within 1.2 seconds, including X, Y, and Z coordinate deviations, temperature gradients, and the affected area. It then tilted the hot air nozzles 12 degrees toward the area and increased the heating power to 115% of the rated value, causing the temperature in the abnormal area to rise to 183.5°C within 8 seconds. This system achieves precise temperature control, keeping the curing failure rate of special-shaped door panels below 1.2%.

[0069] In the complete solution of step 101 above, accurate detection and three-dimensional modeling of the temperature field on the surface of the moving door body are achieved through the synchronous control mechanism of dynamic tracking and pulsed acquisition, combined with the motion distortion correction algorithm. Its core technical advantage lies in the efficient collaboration between the dynamic tracking module and the thermal imaging scanning unit, which effectively suppresses image blur and data distortion caused by high-speed motion, and ensures the spatial consistency of temperature distribution data and the geometric shape of the door surface; at the same time, through the deep integration of hierarchical temperature difference fluctuation analysis and three-dimensional geometric transformation algorithm, it can not only sensitively capture tiny thermal anomaly areas, but also completely reconstruct a three-dimensional thermal field model that matches the curvature of the door body, bringing the three-dimensional characterization capability of temperature differences, spatial positions and distribution ranges to a new level. This solution breaks through the limitations of traditional static detection and provides high-precision and high-reliability technical support for real-time thermodynamic defect identification and quantitative analysis of moving components in industrial scenarios.

[0070] 102. Construct a three-layer air duct system with independently adjustable top, middle, and bottom sections. A static pressure box is installed at the end of each layer of the air duct to eliminate internal pressure fluctuations. A rotatable guide plate is configured at the output end of the static pressure box. The rotation angle and airflow intensity of the guide plate at the corresponding layer are dynamically adjusted according to the position coordinates and temperature difference values ​​in the three-dimensional thermal field model to form an airflow coverage pattern that matches the curved surface of the door body.

[0071] Optionally, step 102 may specifically include the following steps:

[0072] 1021. A tapered cross-section structure is set up in the top air duct, an expandable blade array is installed in the middle air duct, and a negative pressure adsorption component is connected to the end of the bottom air duct to construct a three-layer air duct system with independent adjustment at the top, middle and bottom parts;

[0073] 1022. Connect the output end of each layer of air duct to the pressure balancing unit, and eliminate the pressure fluctuation inside the air duct through the honeycomb flow resistance component in the pressure balancing unit;

[0074] 1023. Install a direction adjustment unit at the output end of the pressure balance unit, calculate the deflection angle of the direction adjustment unit according to the position coordinates of the abnormal area in the three-dimensional thermal field model, and dynamically adjust the output airflow intensity of the direction adjustment unit according to the amplitude of the temperature difference;

[0075] Among them, step 1023 may specifically include the following processes: installing a direction adjustment unit at the output end of the pressure balancing unit, extracting the position coordinates of the abnormal area in the three-dimensional thermal field model through the position analysis module, and generating a deflection angle control parameter that matches the curvature of the door surface; inputting the amplitude of the temperature difference value into the intensity distribution module, and calculating the adjustment proportional coefficient of the output airflow intensity based on the proportional relationship between the temperature difference value and the preset reference value; receiving the deflection angle control parameter and the adjustment proportional coefficient through the servo drive unit, and synchronously controlling the mechanical deflection angle of the direction adjustment unit and the output airflow pressure value; setting a feedback compensation loop between the direction adjustment unit and the pressure balancing unit, and dynamically correcting the deflection angle control parameter and the adjustment proportional coefficient according to the real-time monitored airflow coverage uniformity and the amplitude change trend of the temperature difference value, so as to realize dynamic adjustment of the output airflow intensity.

[0076] 1024. Through the combined effect of the deflection angle of the direction adjustment unit and the output airflow intensity, an airflow coverage pattern that matches the curved surface of the door body is formed.

[0077] In the above steps, the tapered cross-section structure refers to a pipe structure with a gradually decreasing cross-sectional area in the top air duct, which is used to accelerate the airflow velocity; the expandable blade array refers to a plurality of retractable guide plates installed in the middle air duct, which change the airflow distribution by adjusting the blade expansion angle; the negative pressure adsorption component refers to a vacuum generating device connected to the end of the bottom air duct, which enhances the airflow adsorption force through the negative pressure effect; the pressure balancing unit refers to a pressure stabilizing device connected to the output end of the air duct, with a built-in honeycomb baffle component for uniforming the airflow pressure; the honeycomb baffle component refers to a porous structure composed of hexagonal holes, which eliminates pressure fluctuations by increasing the resistance of the airflow path; the direction adjustment unit refers to a rotatable guide device installed at the output end of the pressure balancing unit, which adjusts the airflow direction through mechanical deflection; the position analysis module refers to an algorithm module that extracts the coordinates of the abnormal area from the three-dimensional thermal field model; the intensity distribution module refers to a control unit that calculates the airflow intensity adjustment coefficient based on the temperature difference amplitude; the servo drive unit refers to an electromechanical actuator that receives control parameters and drives the direction adjustment unit to move; and the feedback compensation loop refers to a closed-loop control system that monitors the airflow coverage effect in real time and corrects the control parameters.

[0078] In the embodiment of the present application, first, through step 1021, a tapered cross-sectional structure is designed in the top air duct, and a pipe with a decreasing cross-sectional area with a taper of 15 degrees is used to accelerate the airflow; an array of 12 groups of independently deployable blades is installed in the middle air duct, and the deployment angle of each group of blades is controlled by a stepper motor; a negative pressure adsorption component is integrated at the end of the bottom air duct, and a vacuum pump is connected to generate a negative pressure environment of -5kPa; and the physical structure of the three-layer air duct system with independent control of the top, middle and bottom parts is completed.

[0079] Secondly, in step 1022, the output ends of the air ducts on each layer are connected to a pressure balancing unit, and a honeycomb flow-blocking component with a thickness of 50 mm is installed inside the unit. When the high-speed airflow passes through the hexagonal holes, the friction resistance of the hole wall is used to reduce the amplitude of the airflow pulsation. The pressure fluctuation value in the air duct is monitored in real time by a pressure sensor, and the density of the honeycomb component is automatically increased when the fluctuation amplitude exceeds ±200 Pa. The output end obtains a stable airflow with a pressure fluctuation range controlled within ±50 Pa.

[0080] Next, in step 1023, a direction adjustment unit is installed at the output end of the pressure balance unit. The position analysis module reads the XYZ coordinate data of the abnormal area in the three-dimensional thermal field model, and calculates the target deflection angle of the guide plate in combination with the door surface curvature equation; the intensity distribution module calculates the airflow intensity adjustment coefficient based on the ratio of the temperature difference value to the reference value of 20°C, and outputs 120% of the reference airflow intensity when the temperature difference reaches 30°C; the servo drive unit receives the deflection angle instruction and the intensity coefficient, controls the rotation of the guide plate through a rotary encoder with an accuracy of 0.1°, and synchronously adjusts the speed of the variable frequency fan to realize dynamic adjustment of the airflow intensity; the feedback compensation loop monitors the temperature change rate of the airflow coverage area in real time through an infrared thermal imager. When the temperature difference drops below the preset value within 10 seconds, the deflection angle is automatically increased by 3° and the airflow intensity is increased by 15%.

[0081] Finally, in step 1024, the mechanical deflection angle of the direction adjustment unit is combined and matched with the output airflow intensity parameter. When the guide plate is deflected by 45°, a fan-shaped coverage pattern is formed with 120% of the reference airflow intensity; when it is deflected by 30°, a focused injection pattern is formed with 90% of the airflow intensity. Through multi-mode combination, an airflow coverage network matching the shape of the abnormal area of ​​the three-dimensional thermal field model is generated on the door surface, thereby realizing directional and precise control of the temperature abnormality area.

[0082] In practical applications, an intelligent air field adjustment system based on three-dimensional thermal field model feedback is constructed in the curing oven of the special-shaped door panel to meet the demand for uniformity of hot air coverage of the curved door panel. The system is composed of a top tapered air duct, a middle adjustable blade air duct, and a bottom negative pressure adsorption air duct. A 150 mm thick aluminum honeycomb static pressure box is arranged at the end of each layer of air duct, and a six-sided flow resistance module with a hole diameter of 8 mm is arranged inside the box to suppress the air flow pressure fluctuation within ±50 Pa. When a 3.2 ℃ temperature difference anomaly is detected in the wave area at the top of the door body, the position analysis module calculates the curvature radius of the area as 650 mm according to the three-dimensional model coordinates (X: 1250 mm, Y: 850 mm), drives the 304 stainless steel deflector plate at the end of the top air duct to rotate to a 32.5° deflection angle at an angular velocity of 15° / s, and simultaneously increases the air flow intensity to 130% of the standard value through the PID algorithm. The folding blade array of the middle air duct is synchronously unfolded to a 45° inclination angle to form a conical air flow beam covering the waist line area of the door body, and the bottom negative pressure air duct starts the adsorption power of 2.5 kW centrifugal fan to ensure the air flow adhesion degree of the decorative groove at the lower edge of the door panel. According to the real-time monitoring of the 0.5 ℃ temperature difference change trend, the servo motor dynamically corrects the deflector plate to an optimized angle of 28.7° within 2 seconds, and cooperates with the stepwise decrease of the air flow intensity to stabilize the temperature fluctuation of the normal area within ±0.8 ℃. After the three-layer air ducts work together, the uniformity index of the door body surface wind speed distribution is improved, and the curing unevenness caused by complex structure is effectively eliminated.

[0083] In the complete scheme of the above step 102, the combination of three-layer independent air duct system and intelligent air flow regulation realizes the precise dynamic control of the thermal anomaly on the door body surface. The core lies in the differentiated design of the layered air duct structure, combined with tapered cross section, blade array and negative pressure adsorption technology, cooperating with the static pressure box to stabilize the air flow pressure, to ensure the independent and precise regulation of the air flow at each level; through the coordinates and temperature difference data of the three-dimensional thermal field model, the deflector plate angle and air flow intensity are dynamically driven to make the air flow coverage accurately match the curved surface form of the door body. The real-time feedback compensation mechanism is integrated to automatically correct the regulation parameters according to the air flow coverage effect and temperature difference change, effectively avoiding the delay and fluctuation of the traditional system, and finally forming an adaptive curved surface structure with controllable intensity gradient, an efficient air flow distribution mode, which significantly improves the targeting temperature regulation accuracy and energy distribution uniformity of the thermal anomaly area.

[0084] 103、When the area ratio of the abnormal area exceeds a set proportion, adjust the air door opening degree of the corresponding air duct based on the air flow coverage mode, calculate the incremental coefficient of the compensation air volume according to the temperature difference value amplitude, and generate a hierarchical compensation instruction based on the incremental coefficient of the compensation air volume;

[0085] Wherein, step 103 can specifically include the following steps:

[0086] 1031. When the area ratio of the abnormal region exceeds a set ratio, determine the spatial adjustment priority sequence of the target air duct according to the correspondence between the hierarchical position in the airflow coverage pattern and the door surface;

[0087] 1032. Based on the space adjustment priority sequence, adjust the damper opening of the target air duct in stages. In the first stage, adjust the basic opening value linearly according to the area ratio. In the second stage, calculate the incremental coefficient of the compensation air volume based on the product of the temperature difference amplitude and the basic opening value.

[0088] 1033. Input the incremental coefficient of the compensation air volume into the compensation decision unit, and generate a hierarchical compensation instruction including the target air duct identifier, the compensation air volume value and the execution sequence through the hierarchical association rule preset in the compensation decision unit.

[0089] In the above steps, the area ratio refers to the ratio of the abnormal area to the total area of ​​the detection area at the same level; the set ratio refers to the preset threshold value of the area ratio of the abnormal area, which triggers the compensation mechanism when it exceeds this value; the airflow coverage pattern refers to the airflow distribution pattern formed by the direction adjustment unit; the hierarchical position refers to the top, middle and bottom spatial levels of the duct system; the space adjustment priority sequence refers to the duct adjustment order sorted according to the distribution density of the abnormal area; the basic opening value refers to the initial adjustment amount of the damper opening angle; the incremental coefficient of the compensation air volume refers to the additional adjustment ratio of the air volume calculated based on the temperature difference amplitude; the compensation decision unit refers to the algorithm module that generates control instructions according to preset rules; the hierarchical association rule refers to the linkage control strategy for air volume compensation between duct levels; the hierarchical compensation instruction refers to a set of control commands containing the target duct identification, compensation parameters and timing.

[0090] In an embodiment of the present application, first, step 1031 is used to monitor the area ratio of abnormal areas in each level detection area in real time. When the area ratio of the top level exceeds 15%, the middle level exceeds 20%, or the bottom level exceeds 25%, the compensation mechanism is triggered; based on the coordinate distribution density of the abnormal area in the three-dimensional thermal field model, the spatial weight coefficients of the top, middle, and bottom levels are calculated; the weight coefficients are arranged in descending order to generate a spatial adjustment priority sequence, and the air duct at the level with the highest priority enters the adjustment process first.

[0091] Secondly, through step 1032, the basic opening value is linearly adjusted according to the area ratio in the first stage. When the area ratio of the top layer is 18%, the basic opening value calculation formula is: basic opening value = reference opening 30°×(18% / 15%), and an opening adjustment amount of 36° is obtained; in the second stage, the incremental coefficient is calculated according to the temperature difference amplitude. When the maximum temperature difference is detected to be 40°C, the incremental coefficient = 40°C / reference temperature difference 20°C = 2.0; the final compensation air volume value = basic opening value 36°×incremental coefficient 2.0 = 72° equivalent damper opening, realizing the precise calculation of the compensation air volume in stages.

[0092] Finally, the incremental coefficient is input into the compensation decision unit through step 1033, and the preset hierarchical association rule is called: when the compensation amount of the top layer exceeds 60°, the air volume of the middle layer is increased by 10%; the hierarchical compensation instruction including the target layer identifier, the compensation air volume value and the execution interval is generated through the timing optimization algorithm. The instruction example is "top air duct opening 72° - middle linkage + 10% air volume - delay 3 seconds to execute", completing the dynamic air volume compensation control of the abnormal area.

[0093] In practical applications, for example, in the intelligent temperature control system of the curing oven for special-shaped door panels, when it is detected that the area of ​​abnormal temperature zones on the surface of the door body accounts for more than 15%, the system starts the graded air volume compensation mechanism. Taking an embossed door panel with a length of 2.5 meters and a curvature radius of 0.6 meters as an example, when an overheating area of ​​0.45 m2 appears in the top decorative pattern area, the spatial priority algorithm determines that the top tapered air duct needs to be adjusted first based on the three-dimensional coordinates of the abnormal area. In the first stage, the opening of the electric damper in the top air duct is linearly increased from the baseline value of 55% to 72%, and the auxiliary compensation mode of the middle air duct is activated simultaneously. In the second stage, based on the temperature difference of 7.2°C, the compensation air volume increment coefficient K = 18% × 7.2 = 1.3 is calculated, and the air volume of the top air duct is increased from the standard value of 3800m 3 / h increased to 4940m 3 / h, and at the same time, the expansion angle of the middle folding blade array is increased from 30° to 48° to enhance the lateral airflow penetration. The compensation decision unit generates an instruction sequence within 0.8 seconds: first, the top air duct damper opening adjustment is completed within 1.2 seconds, the middle air duct compensation is started after a delay of 0.5 seconds, and finally the bottom negative pressure adsorption fan power is linked to increase from 3.2kW to 4.8kW. Post-implementation monitoring shows that the area of ​​the abnormal area is reduced to 0.18㎡ within 6 seconds, the average temperature difference is reduced to +2.3℃, and the surface wind speed uniformity index is restored from 0.65 to 0.91. The system is set to automatically trigger a secondary compensation cycle when the residual abnormal area after a single compensation is greater than 8%. The fuzzy PID algorithm is used to increase the accuracy of the incremental coefficient to 0.1 level to ensure that the temperature field fluctuation during the curing process is stable within the process requirement range of ±1.5℃.

[0094] In the complete solution of step 103 above, the adaptive optimization and upgrade of the thermal field control system is achieved through the linkage design of the threshold trigger mechanism of the abnormal area ratio and the hierarchical compensation strategy. The core of this solution is to establish a priority sequence for duct adjustment based on the mapping relationship between the airflow coverage pattern and the spatial position of the door body when the area of ​​the abnormal area exceeds the limit, and to dynamically adjust the damper opening in stages through the dual parameter coupling of the area ratio and the temperature difference amplitude: first, the basic opening is linearly set according to the area ratio, and then the incremental coefficient of the compensation air volume is calculated by superimposing the temperature difference amplitude to form a step-by-step control strategy. Finally, the compensation coefficient is converted into a compensation instruction containing the target identification, air volume value and time sequence logic through the hierarchical association rule, so that the airflow output intensity is accurately matched with the spatial distribution and thermodynamic characteristics of the thermal field anomaly, significantly improving the air volume distribution efficiency and thermal balance response speed under large-area thermal anomaly conditions, and ensuring the stable operation of the system under complex thermal field disturbances.

[0095] 104. According to the execution status of the hierarchical compensation instruction and the changing trend of the incremental coefficient of the compensation air volume, when the temperature difference value of the specific position coordinates in the three-dimensional thermal field model exceeds the safety threshold, the corresponding heating source is cut off and the heat dissipation is switched to the redundant cooling channel. At the same time, based on the incremental coefficient of the compensation air volume, the heat dissipation intensity of the redundant channel is adjusted, and a directional heat dissipation loop is formed through the synchronous correction of the guide plate angle and the coordinated action of the vortex suppression device in the static pressure box.

[0096] Optionally, step 104 may specifically include the following steps:

[0097] 1041. Monitor the execution status of the level compensation instruction and the change trend of the incremental coefficient of the compensation air volume in real time. When the change rate of the incremental coefficient of the level compensation instruction exceeds a set threshold, activate the early warning detection mode;

[0098] 1042. In the early warning detection mode, the boundary of the coordinate area where the temperature difference value in the three-dimensional thermal field model continuously exceeds the standard is tracked, and when the expansion rate of the tracking area exceeds the set safety threshold, a protection response is triggered;

[0099] 1043. Cut off the power supply circuit of the heating source corresponding to the target coordinate area through the multi-way switching unit, and simultaneously switch the redundant cooling channel and the main air duct system to a parallel heat dissipation mode;

[0100] 1044. During the heat dissipation mode switching process, the heat dissipation intensity of the redundant cooling channel is adjusted based on the current incremental coefficient of the compensation air volume, the current rotation angle data of the guide plate is synchronously called, and the angle of the guide plate is corrected according to the coordinate position of the target area to adjust the heat dissipation airflow direction;

[0101] 1045. Synchronously activate the vortex suppression device in the static pressure box to eliminate the sudden pressure change on the airflow path. Through the coordinated control of the guide plate angle correction and the timing of the vortex suppression device, the heat dissipation airflow forms a directional circulation loop along the curvature of the door surface.

[0102] Among them, step 1045 may specifically include the following processes: calling the current rotation angle data of the guide plate, and directly calculating the spoiler deployment reference angle of the vortex suppression device in the static pressure box according to the geometric relationship between the current rotation angle data and the coordinate position of the target area; activating the spoiler array in the vortex suppression device, and adjusting the deployment angle of each spoiler in the array based on the spoiler deployment reference angle to eliminate the pressure mutation related to the guide plate angle in the heat dissipation airflow path; inputting the current rotation angle data of the guide plate and the spoiler deployment angle into the timing collaborative control unit to generate a collaborative control instruction that changes synchronously with the curvature of the door surface, and synchronously controlling the guide plate angle correction action and the spoiler deployment action of the vortex suppression device; through the periodic iteration of the collaborative control instruction, the heat dissipation airflow direction is always dynamically matched with the current rotation angle of the guide plate, and the airflow separation phenomenon is suppressed by compensating and adjusting the spoiler deployment angle.

[0103] In the above steps, the hierarchical compensation instruction refers to a set of control commands containing the target air duct identification, compensation parameters and timing; the incremental coefficient of the compensation air volume refers to the additional adjustment ratio of the air volume calculated based on the temperature difference amplitude; the safety threshold refers to the preset temperature difference limit; the redundant cooling channel refers to the backup heat dissipation path in parallel with the main air duct; the guide plate angle correction refers to the mechanical adjustment process of adjusting the airflow direction according to the coordinates of the target area; the vortex suppression device in the static pressure box refers to a pressure stabilization mechanism composed of an array of deployable spoilers; the spoiler deployment reference angle refers to the minimum spoiler deployment angle required to suppress airflow separation; the timing collaborative control unit refers to the instruction generation module for synchronizing the action timing of multiple devices; the directional heat dissipation loop refers to the airflow circulation path formed along the curvature of the door surface.

[0104] In the embodiment of the present application, first, step 1041 is used to monitor the changing trend of the incremental coefficient of the compensation air volume in the hierarchical compensation instruction in real time. When it is detected that the incremental coefficient rises from 1.5 to 3.0 within 10 seconds, it is determined that the change rate exceeds the threshold of 0.15 per second, and the early warning detection mode is activated; secondly, the real-time temperature data stream in the three-dimensional thermal field model is called, and a cluster analysis is performed on the coordinate points whose temperature difference exceeds the safety threshold of 50°C; then, the edge tracking algorithm is used to draw the outline of the abnormal area, and the outline area expansion rate is calculated; finally, when it is detected that the area expansion rate reaches 1.2 square meters per minute, the protection response mechanism is triggered and a level 3 early warning signal is sent to the control center.

[0105] Secondly, through step 1042, the regional tracking thread is started in the early warning detection mode, and the sliding window method is used to dynamically monitor the area where the temperature difference exceeds the standard; first, the coordinate temperature data of the three-dimensional thermal field model is collected at a period of 0.5 seconds, and the area where the temperature exceeds the standard for 5 consecutive periods is identified; secondly, the regional boundary expansion vector is calculated through the image morphological processing algorithm, and when it is detected that the boundary expansion speed reaches 1.8 meters per minute, it is determined to be a thermal runaway risk; finally, a protection response trigger instruction is generated including the center coordinates of the target area, the risk level and the diffusion direction angle, and emergency heat dissipation measures are prepared to be implemented.

[0106] Next, the protection response trigger instruction is received through step 1043, and the heating source code corresponding to the target area is parsed; first, the physical position of the target heating source in the power supply matrix is ​​located, and its three-phase power supply circuit is cut off within 200ms through the multi-way switching unit; secondly, the centrifugal fan group of the redundant cooling channel is started, and the solenoid valve of the main air duct system is switched to parallel mode; then, the airflow pressure value of the parallel channel is calibrated, and the output air pressure of the redundant channel is stabilized within the range of 2.5kPa±5% through the PID adjustment algorithm; finally, the airflow mixing uniformity of the main air duct and the redundant channel is verified to ensure that the pressure fluctuation does not exceed ±30Pa.

[0107] Then, step 1044 is used to adjust the heat dissipation intensity based on the incremental coefficient of the current compensation air volume; when the incremental coefficient is 3.0, the heat dissipation fan speed of the redundant channel is increased to 300% of the baseline value; first, the current rotation angle data of the deflector is read. If the deflector is in a 40° deflection state, it needs to be corrected to 48° according to the curvature radius calculation of the target area coordinates; secondly, the deflector angle is adjusted at a rate of 8° per second by a high-precision servo motor; then, a laser Doppler velocimeter is used to monitor the airflow direction in real time. When it is detected that the airflow axis deviates from the center of the target area by more than 2°, the angle fine-tuning program is automatically triggered; finally, after completing the deflector angle correction, an airflow coverage verification report is generated and updated to the control system.

[0108] Finally, step 1045 is used to call the current angle data of the deflector at 48°, and the position of the airflow separation point in the static pressure box is calculated in combination with the door curvature equation; first, the base angle for deploying the spoiler is determined to be 25°, and the corresponding array of 8 spoilers in the vortex suppression device is activated; secondly, a synchronization instruction is generated through the timing coordination control unit, so that the deflector angle correction action and the spoiler deployment action complete the timing matching within 0.3 seconds; then a high-frequency pressure sensor is used to monitor the pressure change in the airflow path, and when a local pressure surge exceeding 50Pa is detected, the spoiler deployment angle is automatically increased to 28°; finally, through the dynamic coordination of the deflector angle and the spoiler deployment angle, a directional heat dissipation loop with a flow rate of 12m / s and a coverage error of less than 1.5% is formed on the door surface, completing the efficient suppression of the thermal runaway area.

[0109] In practical applications, for example, in the curing temperature control system for special-shaped door panels, when it is detected that an embossed aluminum door panel with a length of 3.2 meters and a curvature radius of R = 750 mm has overheated for 120 seconds in the coordinate area X: 1500-1800mm and the compensation air volume increment coefficient is climbing at a rate of 12% per minute, the system immediately cuts off the three groups of 18kW carbon fiber heating tubes in the corresponding area and synchronously opens the DN50 solenoid valve of the redundant cooling channel to 75% opening, allowing -15°C liquid carbon dioxide to be injected into the main air duct through the honeycomb static pressure box at a flow rate of 5.2m / s. Based on the current compensation coefficient K = 1.8, the system increases the liquid CO2 injection pressure of the redundant channel to 0.45MPa within 0.8 seconds, and drives the top guide plate to rotate from 32° to 47.5° deflection angle, while activating 12 sets of vortex suppression plates in the static pressure box: among them, the suppression plates No. 1-6 vibrate at a frequency of 150Hz and expand 55°, and the plates No. 7-12 expand 38° at 120Hz, forming an involute airflow path that matches the curvature of the door body. Through real-time feedback from the laser Doppler velocimeter, the guide plate angle and suppression plate expansion parameters are dynamically corrected every 200ms. When a 0.3m 2 When the airflow stripped the area, the No. 3 and No. 9 suppression sheets immediately deployed +8° and increased the CO2 injection pressure to 0.52 MPa, causing the surface wind speed in this area to surge from 1.8 m / s to 5.1 m / s. Under coordinated control, the temperature in the target area linearly decreased from 192.3°C to 178.6°C within 9 seconds, with the temperature gradient stabilized within a ±1.2°C range. The maximum thermal stress on the door panel surface decreased from 85 MPa to 32 MPa, improving the airflow coverage of the directional heat dissipation loop and effectively preventing carbonization defects in the coating caused by localized overburning of the relief pattern.

[0110] In the complete solution described in step 105, a dynamic response to thermal field anomalies and multi-level heat dissipation control are deeply integrated to construct an adaptive thermal management system with multiple safety safeguards. Its core innovation lies in cross-validating the compensation air volume trend with real-time data from the three-dimensional thermal field model. When the temperature difference exceeds the limit, an intelligent switching mechanism quickly disconnects the heating source and switches to redundant cooling channels, achieving a seamless transition from anomaly warning to active protection. The system dynamically maps the compensation air volume increment coefficient to precisely control the heat dissipation intensity of the redundant channels. Combined with the coordinated control of deflector angle correction and vortex suppression, the cooling airflow path is reconstructed. First, the airflow direction correction is calculated in real time based on the geometric relationship between the deflector rotation angle and the target area coordinates. Second, the dynamic deployment of the spoiler array suppresses airflow separation and eliminates sudden pressure changes. These two actions, driven by the iterative command of the time-series coordinated control unit, ensure that the cooling airflow forms a closed, directional loop along the door curvature, ensuring efficient heat dissipation energy while avoiding secondary thermal disturbances caused by airflow turbulence. This solution breaks through the passive response limitations of traditional thermal management. Through the dual effects of active heat dissipation path optimization and pressure fluctuation suppression, it significantly improves the system reliability and thermal runaway protection capabilities under high-risk working conditions.

[0111] The following is a complete embodiment based on steps 101 to 105:

[0112] In the intelligent curing control system for special-shaped door panels, the system achieves precise temperature regulation through multi-dimensional collaborative control for aluminum alloy door panels with a curvature radius of 0.8 meters and a wavy surface. As the door passes through a 185°C curing oven at a constant speed of 0.6 meters per second, an array of FLIR A8580 infrared thermal imagers, deployed 1.2 meters apart to the side, captures surface temperature data in real time at a 25 Hz scanning frequency. Using a motion compensation algorithm to eliminate the 0.3 mm image smear caused by door movement, the system accurately identifies an abnormally low temperature region with an area of ​​0.35 square meters and a temperature difference of 7.2°C in the top wavy area. Based on a three-dimensional thermal field model generated using B-spline surface reconstruction technology, the system automatically marks the abnormal region as located within a surface interval with a curvature radius of 650 mm and calculates that this region accounts for 18% of the total door surface area.

[0113] The system then activates the dynamic adjustment mechanism of the top tapered air duct. The 304 stainless steel deflector rotates to a 32.5-degree deflection angle within 0.5 seconds, simultaneously increasing airflow intensity to 130% of the standard value. The central air duct's 12 folding blade arrays deploy at a 45-degree angle, forming a tapered high-speed airflow beam that covers the door waistline. The bottom negative pressure adsorption air duct activates a 2.5-kilowatt centrifugal fan to enhance airflow adhesion in decorative grooves deeper than 15 mm. If the area of ​​the abnormal area does not fall below the set threshold within 10 seconds, the system calculates a compensation coefficient of 1.3 based on the product of the area and the temperature difference, adjusting the top damper opening to 72% in stages, increasing airflow from the baseline value of 3,800 cubic meters per hour to 4,940 cubic meters per hour. Simultaneously, the central blade array's deployment angle is increased to 48 degrees.

[0114] Upon detecting a temperature difference exceeding the safety threshold of +8.5°C at coordinate X1350mm, the system immediately disconnected the three 18-kW carbon fiber heating tubes in the corresponding area and switched to redundant cooling channels for directional cooling. Liquid carbon dioxide was injected into the main air duct via a DN50 solenoid valve at a flow rate of 5.2 meters per second. The deflector angle was simultaneously adjusted to a 47.5-degree deflection. Twelve vortex suppressor flaps within the static pressure chamber were asymmetrically controlled, with the first six flaps deployed 55 degrees and the last six 38 degrees, forming an involute airflow path that matched the door curvature. Combined with a spray pressure of 0.45 MPa, the target area temperature linearly decreased from 192.3°C to 178.6°C in 9 seconds, while surface air velocity uniformity increased to 94%. Ultimately, the process goals of achieving a curing failure rate of less than 1.2% for the special-shaped door panels and a temperature control accuracy of + / - 0.8°C were achieved. The servo motor responds to the feedback data from the laser Doppler velocimeter in real time, dynamically correcting the guide vane angle with an accuracy of plus or minus 0.3 degrees every 200 milliseconds. The vibration frequency of the eddy current suppression plate is precisely adjusted in steps of 5 Hz to ensure that the airflow coverage dynamically matches the complex curved surface of the door body.

[0115] Figure 3 The present invention provides a schematic diagram of a temperature control system for an automated production line of paint-coated doors. Figure 3 As shown, the system includes:

[0116] The acquisition module 31 scans the temperature distribution data of the door surface in real time while it is moving, identifies abnormal areas where the temperature difference exceeds the set range by synchronously eliminating the motion acquisition deviation, and generates a three-dimensional thermal field model containing position coordinates, temperature difference values, and area ratios based on the temperature distribution data;

[0117] Elimination module 32 constructs a three-layer air duct system with independently adjustable top, middle, and bottom sections. A static pressure box is provided at the end of each layer of the air duct to eliminate internal pressure fluctuations. A rotatable guide plate is configured at the output end of the static pressure box. The rotation angle and airflow intensity of the guide plate at the corresponding layer are dynamically adjusted according to the position coordinates and temperature difference values ​​in the three-dimensional thermal field model to form an airflow coverage pattern that matches the curved surface of the door body.

[0118] a compensation module 33, when the area ratio of the abnormal area exceeds a set ratio, adjusting the corresponding air duct damper opening according to the hierarchical position based on the airflow coverage pattern, calculating the incremental coefficient of the compensation air volume in combination with the temperature difference amplitude, and generating a hierarchical compensation instruction based on the incremental coefficient of the compensation air volume;

[0119] The correction module 34, according to the execution status of the hierarchical compensation instruction and the trend of the incremental coefficient change, cuts off the corresponding heating source and switches to the redundant cooling channel for heat dissipation when the temperature difference value of the specific position coordinates in the three-dimensional thermal field model exceeds the safety threshold, and at the same time adjusts the heat dissipation intensity of the redundant channel based on the incremental coefficient of the compensation air volume, and forms a directional heat dissipation loop through the coordinated action of the synchronous correction of the guide plate angle and the vortex suppression device in the static pressure box.

[0120] Figure 3 The temperature control system of the automatic production line of paint-baked doors can be executed Figure 1 The implementation principle and technical effects of the temperature control method for an automated production line for painted doors described in the illustrated embodiment will not be elaborated on here. The specific manner in which each module and unit performs operations in the temperature control system for an automated production line for painted doors in the above embodiment has been described in detail in the embodiments of the method and will not be elaborated on here.

[0121] In one possible design, Figure 3 The temperature control system of the automatic production line of painted doors in the embodiment shown can be implemented as a computing device, such as Figure 4 As shown, the computing device may include a storage component 41 and a processing component 42;

[0122] The storage component 41 stores one or more computer instructions, wherein the one or more computer instructions are called and executed by the processing component 42 .

[0123] The processing component 42 is used for the above Figure 1 The embodiment provides a temperature control method for an automated production line of painted doors.

[0124] The processing component 42 may include one or more processors to execute computer instructions to perform all or part of the steps in the above method. Of course, the processing component may also be implemented as one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above method.

[0125] The storage component 31 is configured to store various types of data to support operations at the terminal. The storage component can be implemented by any type of volatile or non-volatile memory device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0126] Of course, a computing device may also include other components, such as input / output interfaces, display components, communication components, etc.

[0127] The input / output interface provides an interface between the processing component and the peripheral interface module, which can be an output device, an input device, etc.

[0128] The communication component is configured to facilitate, among other things, wired or wireless communications between the computing device and other devices.

[0129] Among them, the computing device can be a physical device or an elastic computing host provided by a cloud computing platform, etc. In this case, the computing device can refer to a cloud server, and the above-mentioned processing components, storage components, etc. can be basic server resources rented or purchased from the cloud computing platform.

[0130] The present application also provides a computer storage medium storing a computer program, wherein the computer program can achieve the above-mentioned Figure 1 The embodiment shown is a temperature control method for an automated production line of painted doors.

[0131] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0132] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0133] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A temperature control method for an automated production line of paint-baked doors, characterized in that: include: Real-time scanning of the temperature distribution data on the surface of the moving door body, identifying abnormal areas where the temperature difference exceeds the set range by synchronously eliminating motion acquisition deviation, and generating a three-dimensional thermal field model containing position coordinates, temperature difference values ​​and area ratio based on the temperature distribution data; A three-layer air duct system with independently adjustable top, middle, and bottom sections is constructed. A static pressure box is installed at the end of each layer of the air duct to eliminate internal pressure fluctuations. A rotatable guide plate is configured at the output end of the static pressure box. The rotation angle and airflow intensity of the guide plate at the corresponding layer are dynamically adjusted according to the position coordinates and temperature difference values ​​in the three-dimensional thermal field model to form an airflow coverage pattern that matches the curved surface of the door body. When the area ratio of the abnormal area exceeds the set ratio, the corresponding air duct damper opening is adjusted according to the hierarchical position based on the airflow coverage mode, and the incremental coefficient of the compensation air volume is calculated in combination with the temperature difference amplitude, and a hierarchical compensation instruction is generated based on the incremental coefficient of the compensation air volume; According to the execution status of the hierarchical compensation instruction and the changing trend of the incremental coefficient of the compensation air volume, when the temperature difference value of the specific position coordinates in the three-dimensional thermal field model exceeds the safety threshold, the corresponding heating source is cut off and the heat dissipation is switched to the redundant cooling channel. At the same time, based on the incremental coefficient of the compensation air volume, the heat dissipation intensity of the redundant channel is adjusted, and a directional heat dissipation loop is formed through the synchronous correction of the guide plate angle and the coordinated action of the vortex suppression device in the static pressure box.

2. The method according to claim 1, characterized in that A three-layer air duct system with independently adjustable top, middle, and bottom sections is constructed. A static pressure box is installed at the end of each layer of the air duct to eliminate internal pressure fluctuations. A rotatable guide plate is configured at the output end of the static pressure box. The rotation angle and airflow intensity of the guide plate at the corresponding layer are dynamically adjusted according to the position coordinates and temperature difference values ​​in the three-dimensional thermal field model to form an airflow coverage pattern that matches the curved surface of the door body, including: A tapered cross-section structure is set in the top air duct, an expandable blade array is installed in the middle air duct, and a negative pressure adsorption component is connected to the end of the bottom air duct to construct a three-layer air duct system with independent adjustment at the top, middle and bottom; The output end of each layer of air duct is connected to the pressure balancing unit, and the honeycomb flow resistance component in the pressure balancing unit is used to eliminate the pressure fluctuation inside the air duct; A direction adjustment unit is installed at the output end of the pressure balance unit, and a deflection angle of the direction adjustment unit is calculated according to the position coordinates of the abnormal area in the three-dimensional thermal field model, and the output airflow intensity of the direction adjustment unit is dynamically adjusted according to the amplitude of the temperature difference; Through the combined effect of the deflection angle of the direction adjustment unit and the output airflow intensity, an airflow coverage pattern that matches the curved surface of the door body is formed.

3. The method according to claim 2, characterized in that A direction adjustment unit is installed at the output end of the pressure balance unit, and a deflection angle of the direction adjustment unit is calculated according to the position coordinates of the abnormal area in the three-dimensional thermal field model. At the same time, the output airflow intensity of the direction adjustment unit is dynamically adjusted according to the amplitude of the temperature difference, including: A direction adjustment unit is installed at the output end of the pressure balance unit, and the position coordinates of the abnormal area in the three-dimensional thermal field model are extracted through the position analysis module to generate a deflection angle control parameter that matches the curvature of the door surface; The amplitude of the temperature difference value is input into the intensity distribution module, and the adjustment proportional coefficient of the output airflow intensity is calculated based on the proportional relationship between the temperature difference value and the preset reference value; The servo drive unit receives the deflection angle control parameter and the adjustment proportional coefficient, and synchronously controls the mechanical deflection angle and the output airflow pressure value of the direction adjustment unit; A feedback compensation loop is set between the direction adjustment unit and the pressure balance unit. According to the real-time monitored airflow coverage uniformity and the amplitude change trend of the temperature difference, the deflection angle control parameter and the adjustment proportional coefficient are dynamically corrected to achieve dynamic adjustment of the output airflow intensity.

4. The method according to claim 1, wherein According to the execution status of the hierarchical compensation instruction and the change trend of the incremental coefficient of the compensation air volume, when the temperature difference value of the specific position coordinates in the three-dimensional thermal field model exceeds the safety threshold, the corresponding heating source is cut off and the heat dissipation is switched to the redundant cooling channel. At the same time, the heat dissipation intensity of the redundant channel is adjusted based on the incremental coefficient of the compensation air volume. A directional heat dissipation loop is formed through the coordinated action of the synchronous correction of the guide plate angle and the vortex suppression device in the static pressure box, including: monitoring the execution status of the level compensation instruction and the change trend of the incremental coefficient of the compensation air volume in real time, and activating the early warning detection mode when the rate of change of the incremental coefficient of the level compensation instruction exceeds a set threshold; In the early warning detection mode, the boundary of the coordinate area where the temperature difference value in the three-dimensional thermal field model continuously exceeds the standard is tracked. When the expansion rate of the tracking area exceeds the set safety threshold, the protection response is triggered; Cut off the power supply circuit of the heating source corresponding to the target coordinate area through the multi-way switching unit, and switch the redundant cooling channel and the main air duct system to a parallel heat dissipation mode; During the heat dissipation mode switching process, the heat dissipation intensity of the redundant cooling channel is adjusted based on the current incremental coefficient of the compensation air volume, the current rotation angle data of the guide plate is synchronously called, and the angle of the guide plate is corrected according to the coordinate position of the target area to adjust the heat dissipation airflow direction; The vortex suppression device in the static pressure box is synchronously activated to eliminate the sudden pressure change in the airflow path. Through the coordinated control of the deflector angle correction and the timing of the vortex suppression device, the heat dissipation airflow forms a directional circulation loop along the curvature of the door surface.

5. The method according to claim 4, characterized in that Synchronously activate the vortex suppression device in the static pressure box to eliminate sudden pressure changes in the airflow path. Through the coordinated control of the deflector angle correction and the timing of the vortex suppression device, the heat dissipation airflow forms a directional circulation loop along the curvature of the door surface, including: calling the current rotation angle data of the deflector, and directly calculating the deployment reference angle of the spoiler of the vortex suppression device in the static pressure box according to the geometric relationship between the current rotation angle data and the coordinate position of the target area; activating the spoiler array in the vortex suppression device, and adjusting the deployment angle of each spoiler in the array based on the spoiler deployment reference angle to eliminate the pressure surge in the heat dissipation airflow path related to the deflector angle; Inputting the current rotation angle data of the deflector and the spoiler deployment angle into a timing cooperative control unit, generating a cooperative control instruction that changes synchronously with the curvature of the door surface, and synchronously controlling the deflector angle correction action and the spoiler deployment action of the vortex suppression device; Through the periodic iteration of the collaborative control instructions, the heat dissipation airflow direction is always kept dynamically matched with the current rotation angle of the guide plate, and the airflow separation phenomenon is suppressed by compensating the deployment angle of the spoiler.

6. The method according to claim 1, characterized in that Real-time scanning of the temperature distribution data on the surface of the moving door body, identifying abnormal areas where the temperature difference exceeds the set range by synchronously eliminating motion acquisition deviation, and generating a three-dimensional thermal field model containing position coordinates, temperature difference values ​​and area ratios based on the temperature distribution data, including: The dynamic tracking module installed on the side of the conveyor track is synchronized with the door's travel speed to control the thermal imaging scanning unit to collect surface temperature data in pulse trigger mode; The continuously collected surface temperature data is input into the space conversion unit, and the motion distortion correction of the scanned data is performed through the speed feedback signal of the dynamic tracking module to generate temperature distribution data that matches the geometric shape of the door surface; Dividing the temperature distribution data into hierarchical detection areas, calculating the temperature difference fluctuation amplitude according to the degree of dispersion of the temperature values ​​within the hierarchical detection areas, screening out areas where the temperature difference fluctuation amplitude exceeds a set threshold and marking them as abnormal areas; The position coordinates, temperature difference value and area ratio of the abnormal area are input into the three-dimensional modeling unit, and a three-dimensional thermal field model consistent with the curvature of the door surface is generated through geometric transformation of the coordinate system.

7. The method according to claim 1, characterized in that When the area ratio of the abnormal area exceeds the set ratio, the corresponding air duct damper opening is adjusted according to the hierarchical position based on the airflow coverage mode, and the incremental coefficient of the compensation air volume is calculated in combination with the temperature difference amplitude, and a hierarchical compensation instruction is generated based on the incremental coefficient of the compensation air volume, including: When the area ratio of the abnormal area exceeds a set ratio, the spatial adjustment priority sequence of the target air duct is determined according to the correspondence between the hierarchical position and the door surface in the airflow coverage pattern; Based on the space adjustment priority sequence, the damper opening of the target air duct is adjusted in stages. In the first stage, the basic opening value is linearly adjusted according to the area ratio. In the second stage, the incremental coefficient of the compensation air volume is calculated according to the product of the temperature difference amplitude and the basic opening value. The incremental coefficient of the compensation air volume is input into the compensation decision unit, and a hierarchical compensation instruction including a target air duct identifier, a compensation air volume value and an execution sequence is generated through a preset hierarchical association rule in the compensation decision unit.

8. A temperature control system for an automated production line of painted doors, characterized in that: include: The acquisition module scans the temperature distribution data of the door body in real time while it is moving. It identifies abnormal areas where the temperature difference exceeds the set range by synchronously eliminating the motion acquisition deviation. Based on the temperature distribution data, it generates a three-dimensional thermal field model containing position coordinates, temperature difference values ​​and area ratios. Elimination module, constructing a three-layer air duct system with independently adjustable top, middle and bottom parts. A static pressure box is set at the end of each layer of air duct to eliminate internal pressure fluctuations. The output end of the static pressure box is equipped with a rotatable guide plate. The rotation angle and airflow intensity of the guide plate at the corresponding layer are dynamically adjusted according to the position coordinates and temperature difference values ​​in the three-dimensional thermal field model to form an airflow coverage pattern that matches the curved surface of the door body; a compensation module, when the area ratio of the abnormal area exceeds a set ratio, adjusting the corresponding air duct damper opening according to the hierarchical position based on the airflow coverage pattern, calculating the incremental coefficient of the compensation air volume in combination with the temperature difference amplitude, and generating a hierarchical compensation instruction based on the incremental coefficient of the compensation air volume; The correction module, based on the execution status of the hierarchical compensation instruction and the changing trend of the incremental coefficient, cuts off the corresponding heating source and switches to the redundant cooling channel for heat dissipation when the temperature difference value of the specific position coordinates in the three-dimensional thermal field model exceeds the safety threshold. At the same time, the heat dissipation intensity of the redundant channel is adjusted based on the incremental coefficient of the compensation air volume, and a directional heat dissipation loop is formed through the synchronous correction of the guide plate angle and the coordinated action of the vortex suppression device in the static pressure box.

9. A computing device, characterized in that It comprises a processing component and a storage component; the storage component stores one or more computer instructions; the one or more computer instructions are used to be called and executed by the processing component to implement a temperature control method for an automated production line of painted doors as described in any one of claims 1 to 7.

10. A computer storage medium, characterized in that A computer program is stored, and when the computer program is executed by a computer, the temperature control method of the automatic production line for paint doors according to any one of claims 1 to 7 is implemented.

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