A temperature control method and system for an automatic production line of baked paint doors

Abstract

The application provides a temperature control method and system for an automatic production line of baked paint doors. The method includes generating a three-dimensional thermal field model containing position coordinates, temperature difference values and area ratios by dynamically scanning the temperature distribution data of the door body surface during movement; then constructing a three-layer air duct system with independent adjustment of the top, middle and bottom parts, dynamically adjusting the rotation angle and air flow intensity of the corresponding level deflector to form an air flow coverage mode matching the door body curved surface; when the area ratio of the abnormal area exceeds the standard, adjusting the air door opening, synchronously calculating the compensation air volume increment coefficient to generate a level compensation instruction; finally, adjusting the heat dissipation intensity through the increment coefficient, forming a directional heat dissipation loop in cooperation with the deflector angle correction and static pressure tank vortex suppression device. The technical scheme provided by the application realizes dynamic perception of temperature abnormalities, accurate compensation of multi-level air flow and closed-loop control of over-temperature protection during the curing process of special-shaped door plates, and improves the curing uniformity and quality stability of the paint surface.

Description

Technical Field

[0001] This application relates to the field of intelligent temperature control technology in industrial automated manufacturing, and in particular to a temperature control method and system for an automated production line for painted doors. Background Technology

[0002] In automated production lines for painting irregularly shaped door panels, it is crucial to ensure uniform heating of the painted surface within the curing oven after spraying to avoid defects such as bubbles, color differences, or insufficient adhesion caused by localized temperature variations. The core technical requirement lies in achieving dynamic temperature control tailored to the complex geometry of the door panels, matching the heat capacity characteristics of different areas in real time, and ensuring a consistent paint curing rate through precise adjustment of heating power. However, the geometric complexity of irregularly shaped door panels significantly exacerbates the uncontrollability of the heat field distribution—curved areas are prone to high-temperature accumulation due to differences in heat convection, while recessed or edge areas are prone to low-temperature stagnation due to thermal conduction resistance. Simultaneously, variations in door panel material or thickness lead to differences in thermal inertia, making it difficult for traditional temperature control systems to synchronously adapt to dynamic heat loads, ultimately resulting in fluctuations in curing quality, energy waste, and decreased yield.

[0003] Currently, the mainstream solution for this requirement is a dynamic temperature control system based on infrared thermal imaging. This system uses multi-angle infrared cameras to scan the temperature distribution on the door panel surface in real time, combines this with a 3D modeling algorithm to generate a thermal field map, and dynamically divides the temperature control zone based on the map, driving the heating module to adjust its power in each zone. Summary of the Invention

[0004] This application provides a temperature control method and system for an automated production line for painted doors, which solves the problem of inaccurate temperature measurement caused by interference from paint surface reflection in the prior art.

[0005] In a first aspect, this application provides a temperature control method for an automated production line for painted doors, including:

[0006] The temperature distribution data of the door surface is scanned in real time during movement. Abnormal areas with temperature differences exceeding the set range are identified by synchronously eliminating motion acquisition deviations. Based on the temperature distribution data, a three-dimensional thermal field model including position coordinates, temperature difference value and area ratio is generated.

[0007] A three-layer air duct system with independent adjustment at the top, middle and bottom is constructed. A static pressure box is set at the end of each 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 level are dynamically adjusted according to the position coordinates and temperature difference value in the three-dimensional thermal field model to form an airflow coverage pattern that matches the curved surface of the door.

[0008] When the area of ​​the abnormal region exceeds the set proportion, the opening of the corresponding air duct damper is adjusted according to the hierarchical position based on the airflow coverage mode. At the same time, the incremental coefficient of the compensation air volume is calculated in combination with the temperature difference value amplitude, and a hierarchical compensation command is generated based on the incremental coefficient of the compensation air volume.

[0009] Based on the execution status of the hierarchical compensation command and the trend of the incremental coefficient of the compensation air volume, when the temperature difference at a specific location in the three-dimensional thermal field model exceeds the safety threshold, the corresponding heating source is cut off and the system switches to the redundant cooling channel for heat dissipation. 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 circuit is formed through the synchronous correction of the guide plate angle and the synergistic effect of the eddy current suppression device in the static pressure box.

[0010] Optionally, a tapered cross-section structure is provided in the top air duct, an deployable 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.

[0011] Connect the output end of each layer of air duct to the pressure balancing unit, and eliminate pressure fluctuations inside the air duct through the honeycomb flow-blocking component in the pressure balancing unit.

[0012] A directional adjustment unit is installed at the output end of the pressure balance unit. The deflection angle of the directional adjustment unit is calculated based on the position coordinates of the abnormal area in the three-dimensional thermal field model. At the same time, the output airflow intensity of the directional adjustment unit is dynamically adjusted according to the amplitude of the temperature difference.

[0013] The combination of the deflection angle of the direction adjustment unit and the output airflow intensity creates an airflow coverage pattern that matches the curved surface of the door.

[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 the position analysis module to generate deflection angle control parameters that match the curvature of the door surface.

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

[0016] The servo drive unit receives the deflection angle control parameters and adjustment ratio coefficient, and synchronously controls the mechanical deflection angle and 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. Based on the real-time monitoring of the airflow coverage uniformity and the amplitude change trend of the temperature difference, the deflection angle control parameter and the adjustment ratio coefficient are dynamically corrected to achieve dynamic adjustment of the output airflow intensity.

[0018] Optionally, the execution status of the hierarchical compensation command and the trend of the incremental coefficient of the compensation air volume are monitored in real time. When the rate of change of the incremental coefficient of the hierarchical compensation command exceeds the set threshold, the early warning detection mode is activated.

[0019] In the early warning detection mode, the coordinate region in the three-dimensional thermal field model where the temperature difference value continuously exceeds the standard is tracked by boundary. When the rate of expansion of the tracked region exceeds the set safety threshold, a protection response is triggered.

[0020] The power supply circuit of the heating source corresponding to the target coordinate area is cut off by the multi-channel switching unit, and the redundant cooling channel and the main air duct system are switched to 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, and the current rotation angle data of the guide plate is called simultaneously. The angle of the guide plate is corrected according to the coordinate position of the target area to adjust the direction of heat dissipation airflow.

[0022] The vortex suppression device inside the static pressure box is activated synchronously to eliminate pressure changes in the airflow path. Through the timing coordination control of the guide plate angle correction and the vortex suppression device, the heat dissipation airflow forms a directional circulation loop along the curvature of the door surface.

[0023] Optionally, the current rotation angle data of the guide vane is called, and the reference angle for the deployment of the vortex suppression device in the static pressure box is directly calculated based on the geometric relationship between the current rotation angle data and the coordinate position of the target area.

[0024] Activate the spoiler array in the eddy current suppression device, and adjust the deployment angle of each spoiler in the array based on the spoiler deployment reference angle to eliminate pressure abrupt changes in the heat dissipation airflow path related to the guide plate angle;

[0025] The current rotation angle data of the guide vane and the deployment angle of the spoiler are input into the timing coordination control unit to generate a coordination control command that changes synchronously with the curvature of the door surface, and synchronously control the guide vane angle correction action and the spoiler deployment action of the eddy current suppression device.

[0026] Through the periodic iteration of the coordinated control commands, the direction of the cooling airflow is always dynamically matched with the current rotation angle of the guide vane, while the airflow separation phenomenon is suppressed by the compensation adjustment of the deflector deployment angle.

[0027] Optionally, the thermal imaging scanning unit can be controlled to collect surface temperature data in a pulse-triggered mode by a dynamic tracking module installed on the side of the conveyor track and synchronized with the door's travel speed.

[0028] The continuously collected surface temperature data is input into the spatial conversion unit, and the motion distortion of the scanned data is corrected by the speed feedback signal of the dynamic tracking module to generate temperature distribution data that matches the geometry of the door surface.

[0029] The temperature distribution data is divided into hierarchical detection areas. The temperature difference fluctuation amplitude is calculated based on the dispersion of temperature values ​​within the hierarchical detection areas. Areas where the temperature difference fluctuation amplitude exceeds a set threshold are selected and marked as abnormal areas.

[0030] The location coordinates, temperature difference, and area ratio of the abnormal region 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, the spatial adjustment priority sequence of the target air duct is determined according to the correspondence between the hierarchical position in the airflow coverage mode and the door surface.

[0032] Based on the spatial 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 based on the product of the temperature difference 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 containing the target air duct identifier, the compensation air volume value and the execution sequence is generated through the hierarchical association rules preset in the compensation decision unit.

[0034] Secondly, this 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 surface in real time during movement, identifies abnormal areas where the temperature difference exceeds the set range by synchronously eliminating motion acquisition deviation, and generates a three-dimensional thermal field model containing position coordinates, temperature difference value and area ratio based on the temperature distribution data.

[0036] The elimination module constructs a three-layer air duct system with independent adjustment at the top, middle and bottom. A static pressure box is set at the end of each layer of 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 level are dynamically adjusted according to the position coordinates and temperature difference value in the three-dimensional thermal field model to form an airflow coverage pattern that matches the curved surface of the door.

[0037] The compensation module adjusts the opening of the corresponding air duct damper according to the hierarchical position based on the airflow coverage mode when the area ratio of the abnormal area exceeds the set ratio. At the same time, it calculates the incremental coefficient of the compensation air volume based on the temperature difference value amplitude and generates a hierarchical compensation command based on the incremental coefficient of the compensation air volume.

[0038] The correction module, based on the execution status of the hierarchical compensation command and the trend of incremental coefficient changes, cuts off the corresponding heating source and switches to redundant cooling channels for heat dissipation when the temperature difference at a specific location in the three-dimensional thermal field model exceeds a safety threshold. At the same time, it adjusts the heat dissipation intensity of the redundant channels based on the incremental coefficient of the compensation air volume, and forms a directional heat dissipation loop through the synchronous correction of the guide plate angle and the synergistic effect of the eddy current suppression device in the static pressure box.

[0039] Thirdly, embodiments of this application provide a computing device, including a processing component and a storage component; the storage component stores one or more computer instructions; the one or more computer instructions are invoked 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] Fourthly, embodiments of this application provide a computer storage medium storing a computer program, which, when executed by a computer, implements a temperature control method for an automated production line for painted doors as described in the first aspect.

[0041] In this embodiment, the temperature distribution data of the door surface is scanned in real time during movement. Abnormal areas where temperature differences exceed a set range are identified by synchronously eliminating motion acquisition deviations. Based on the temperature distribution data, a three-dimensional thermal field model including position coordinates, temperature difference values, and area proportions is generated. A three-layer air duct system with independent adjustments at the top, middle, and bottom is constructed. A static pressure box is installed at the end of each air duct to eliminate internal pressure fluctuations. A rotatable guide vane is configured at the output end of the static pressure box. The rotation angle and airflow intensity of the guide vane at the corresponding level 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 matching the curved surface of the door. When the area of ​​the abnormal region... When the proportion exceeds the set ratio, the opening of the corresponding air duct damper is adjusted according to the hierarchical position based on the airflow coverage mode. At the same time, the incremental coefficient of the compensation air volume is calculated in combination with the temperature difference value amplitude, and a hierarchical compensation command is generated based on the incremental coefficient of the compensation air volume. According to the execution status of the hierarchical compensation command and the changing trend of the incremental coefficient of the compensation air volume, when the temperature difference value at a specific position coordinate in the three-dimensional thermal field model exceeds the safety threshold, the corresponding heating source is cut off and the redundant cooling channel is switched to heat dissipation. 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 circuit 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] By employing real-time dynamic scanning and 3D thermal field modeling technology, abnormal temperature areas during the curing process of irregularly shaped door panels are accurately identified. Combined with a three-layer air duct system with independent layered adjustment and a dynamic control mechanism for the guide plate, adaptive matching between the airflow coverage pattern and the curved shape of the door body is achieved, significantly improving the uniformity of paint film curing. Based on a multi-level compensation control strategy using the area ratio and temperature difference of abnormal areas, the efficiency of airflow distribution can be dynamically optimized, effectively avoiding local overheating or underheating defects. Through the coordinated control of redundant cooling channels and directional heat dissipation circuits, while ensuring the temperature safety threshold, production continuity and process stability are maintained, ultimately achieving the technical effects of improving the consistency of painted door surface quality, reducing energy consumption, and decreasing scrap rate.

[0044] Furthermore, in constructing a three-layer independent regulating air duct system, the top air duct adopts a tapered cross-section structure to accelerate airflow, the middle air duct adjusts the airflow direction through a deployable blade array, and the bottom air duct combines a negative pressure adsorption component to enhance airflow stability. The honeycomb-shaped flow-blocking component of the pressure balancing unit eliminates pressure fluctuations in each air duct layer, and based on the location coordinates and temperature difference values ​​of abnormal areas in the three-dimensional thermal field model, the deflection angle and airflow intensity output of the direction adjustment unit are controlled to form an airflow coverage pattern adapted to the height of the door's curved surface. Through the differentiated design of the tapered structure, blade array, and negative pressure adsorption component, the airflow adaptability of each air duct layer to the irregular curved surface of the door is enhanced; the synergistic effect of the pressure balancing unit and the direction adjustment unit achieves precise control of airflow intensity and angle, effectively improving the positioning accuracy of temperature compensation; the dynamically matched airflow coverage pattern can significantly reduce airflow scattering loss, forming a stable temperature control field in complex curved surface areas, reducing the paint curing defect rate, and simultaneously improving thermal energy utilization efficiency.

[0045] These or other aspects of this application will become more apparent in the following description of the embodiments. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A flowchart of a temperature control method for an automated production line for painted doors provided in this application is shown;

[0048] Figure 2 A scenario diagram is shown illustrating a temperature control method for an automated production line of painted doors provided in this application;

[0049] Figure 3 This application provides a schematic diagram of the structure of a temperature control system for an automated production line of painted doors.

[0050] Figure 4 A schematic diagram of the structure of a computing device provided in this application is shown. Detailed Implementation

[0051] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0052] In some of the processes described in the specification, claims, and accompanying drawings of this application, multiple operations appearing in a specific order are included. However, it should be clearly understood that these operations may not be executed in the order they appear herein, or may be executed in parallel. The operation numbers, such as 101, 102, etc., are merely used to distinguish different operations and do not themselves represent any execution order. Furthermore, these processes may include more or fewer operations, and these operations may be executed sequentially or in parallel. It should be noted that the descriptions such as "first," "second," etc., in this document are used to distinguish different messages, devices, modules, etc., and do not represent a chronological order, nor do they limit "first" and "second" to different types.

[0053] In the automated production of irregularly shaped door panels for painting, traditional temperature control systems rely on fixed-zone heating or static airflow adjustment, which are difficult to adapt to the dynamic thermal field changes caused by the complex geometry of the door panels. Specifically, uneven airflow coverage in curved areas leads to high temperature accumulation, while concave or edge areas experience low temperature stagnation due to differences in heat conduction efficiency. This, coupled with thermal inertia fluctuations caused by differences in door material and thickness, makes it impossible for existing solutions to accurately match dynamic heat load requirements. This results in poor paint curing uniformity, redundant energy consumption, and limited yield. Although dynamic temperature control systems based on infrared thermal imaging partially alleviate the above problems through temperature zone adjustment, their reliance on heating power adjustment still suffers from drawbacks such as response lag and low energy utilization. In particular, they cannot solve the dynamic matching problem between the curved surface of irregularly shaped door panels and airflow patterns.

[0054] To address the aforementioned issues, this application proposes a temperature control method for an automated production line of painted doors. By constructing a three-dimensional thermal field model through real-time scanning, and combining it with a layered, independently adjustable air duct system and a dynamic compensation strategy, precise temperature control is achieved during the curing process of irregularly shaped door panels. Specifically, based on the position coordinates and temperature difference values ​​of the three-dimensional thermal field model, the angle and airflow intensity of multiple layers of guide plates are dynamically adjusted to form an airflow coverage pattern adapted to the height of the door's curved surface. A multi-level compensation mechanism based on the proportion of abnormal areas and the magnitude of temperature differences simultaneously optimizes airflow distribution efficiency. The coordinated control of redundant cooling channels and directional heat dissipation circuits ensures rapid response and thermal field balance in overheated areas. This method effectively solves the temperature deviation problem caused by airflow-curved surface mismatch in traditional technologies, significantly improving the uniformity of paint film curing, thermal energy utilization, and process stability, providing a reliable technical guarantee for the high-quality production of irregularly shaped door panels.

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] Figure 1 A flowchart of a temperature control method for an automated production line for painted doors is provided in this application embodiment, as shown below. Figure 1 As shown, the method includes:

[0057] 101. Real-time scanning of temperature distribution data on the surface of the door during movement, identifying abnormal areas where temperature differences exceed the set range by synchronously eliminating motion acquisition deviations, and generating a three-dimensional thermal field model containing position coordinates, temperature difference values, and area proportions based on the temperature distribution data.

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

[0059] 1011. By synchronously matching the speed of the door with the dynamic tracking module installed on the side of the conveyor track, the thermal imaging scanning unit is controlled to collect surface temperature data in a pulse-triggered mode.

[0060] 1012. Input the continuously collected surface temperature data into the spatial conversion unit, and correct the motion distortion of the scanned data through the speed feedback signal of the dynamic tracking module to generate temperature distribution data that matches the geometry of the door surface.

[0061] 1013. Divide the temperature distribution data into hierarchical detection areas, calculate the temperature difference fluctuation amplitude based on the temperature value 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 location 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 with the same curvature as 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 movement speed, used to acquire the door's moving speed in real time; the thermal imaging scanning unit refers to a device that collects surface temperature data through an infrared detector, using a pulse trigger mode to achieve discontinuous sampling; the pulse trigger mode refers to an intermittent triggering mechanism that dynamically adjusts the data acquisition frequency according to the door's moving speed; the spatial conversion unit refers to a signal processor that converts time-series temperature data into spatially distributed data, eliminating image trailing effects caused by door movement through motion distortion correction; the hierarchical detection area refers to a gridded detection unit divided based on the door's structural features, with each unit containing a fixed area of ​​the door surface; the temperature difference fluctuation amplitude refers to the difference between the highest and lowest temperatures within the same detection unit; and the three-dimensional modeling unit refers to a graphics processing module that maps planar temperature data to a three-dimensional curved surface through geometric transformations.

[0064] In this embodiment, firstly, the dynamic tracking module in step 1011 receives the pulse signal from the track encoder and analyzes the gate's speed value 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 increases to 2 m / s, the trigger interval is shortened to 50 ms, and when the speed decreases to 0.5 m / s, the trigger interval is extended to 200 ms. Next, the infrared focal plane array detector of the thermal imaging scanning unit is controlled to collect instantaneous thermal radiation data in pulse trigger mode, and a single frame thermal image with a resolution of 640×480 pixels is acquired each time it is triggered. Finally, the discrete temperature data with timestamps are integrated into a time-series dataset according to the trigger order to complete the pulse-type data acquisition synchronized with the gate's movement.

[0065] Secondly, in step 1012, the time-series temperature dataset output by the thermal imaging scanning unit is input into the spatial conversion unit, and the instantaneous velocity vector and acceleration data of the door provided by the dynamic tracking module are received simultaneously. Next, a spatiotemporal conversion matrix is ​​constructed in the spatial conversion unit, and the displacement compensation amount corresponding to each time stamp is calculated according to the formula. In the formula, the displacement amount is determined by the integral relationship between velocity and acceleration. Then, the spatial reconstruction of the compensated discrete data points is performed by the bilinear interpolation algorithm to eliminate the image ghosting effect caused by the variable speed motion of the door. Finally, a two-dimensional temperature distribution map that strictly corresponds to the geometry of the door surface is generated, and spatial matrix data containing XY coordinates and temperature values ​​is output.

[0066] Next, in step 1013, the two-dimensional temperature distribution map is divided into hierarchical detection areas according to the layout of the door's reinforcing ribs. Each detection area covers a rectangular area of ​​1.5m × 0.8m. Then, the temperature dataset in each area is statistically analyzed to calculate the temperature range and standard deviation. The temperature range is defined as the difference between the highest and lowest temperatures in the area. Next, areas with a temperature range exceeding 15℃ or a standard deviation exceeding 5℃ are judged as having excessive temperature fluctuation. Finally, the boundary coordinates, maximum temperature difference value, and area ratio parameters of the excessive areas are extracted to generate an abnormal area feature description file containing location, temperature difference, and coverage area.

[0067] Finally, in step 1014, the two-dimensional coordinate data from the abnormal area feature description file is input into the three-dimensional modeling unit, and the surface parameter equations provided by the door CAD model are called. Next, the planar 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 parameter is converted into the density distribution of the three-dimensional mesh. Finally, a three-dimensional thermal field model consistent with the curvature of the door surface is generated, and the temperature difference and coverage of the abnormal area are intuitively displayed through the color gradient and mesh density.

[0068] In practical applications, for example, in a production line for spraying and curing irregularly shaped door panels, when a 2.4-meter-long, 0.8-meter-radius-curing corrugated metal door panel passes through a 185℃ curing oven at a speed of 0.6 m / s, the system initiates a dynamic temperature control process. Three sets of 25Hz VOC infrared thermal imagers are deployed 1.2 meters to the side of the conveyor track. Their servo pan-tilt units adjust the scanning angle in real time according to the curvature of the door surface, triggering pulse scans at 50ms intervals within a ±45° rotation range, simultaneously eliminating 0.3mm-level image ghosting caused by door movement. The collected raw temperature data is matched with the door CAD model using a B-spline surface fitting algorithm with a spatial coordinate accuracy of 0.05mm. An additional 2℃ emissivity compensation is applied to groove areas with a depth exceeding 15mm. The system divides the door surface into a 20mm × 20mm detection grid. When the temperature difference between adjacent grids exceeds 4℃ for 3 seconds, or when the temperature of a single grid deviates from the set value by ±5℃, it is determined to be an abnormal area. Upon detecting a 0.35㎡ low-temperature zone in the wavy area at the top of the door, the 3D modeling engine generates a 3D thermal field map within 1.2 seconds, including XYZ coordinate deviation, temperature gradient, and influence range. This drives the hot air nozzles to tilt 12° towards the area and increases the heating power to 115% of the rated value, causing the temperature in the abnormal area to rise to 183.5℃ within 8 seconds. This system achieves precise temperature difference control, keeping the curing defect rate of irregularly shaped door panels below 1.2%.

[0069] In the complete scheme of step 101 above, a synchronous control mechanism of dynamic tracking and pulsed acquisition, combined with a motion distortion correction algorithm, achieves accurate detection and three-dimensional modeling of the surface temperature field of a moving door. Its core technological advantage lies in the efficient collaboration between the dynamic tracking module and the thermal imaging scanning unit, effectively suppressing image blurring and data distortion caused by high-speed motion, ensuring spatial consistency between temperature distribution data and the geometric shape of the door surface. Simultaneously, through the deep integration of hierarchical temperature difference fluctuation analysis and three-dimensional geometric transformation algorithms, it can sensitively capture minute thermal anomaly areas and completely reconstruct a three-dimensional thermal field model matching the curvature of the door, elevating the three-dimensional characterization capability of temperature differences, spatial location, and distribution range to a new level. This scheme overcomes the limitations of traditional static detection, providing 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 independent adjustment at the top, middle and bottom. A static pressure box is set at the end of each layer of 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 level are dynamically adjusted according to the position coordinates and temperature difference value in the three-dimensional thermal field model to form an airflow coverage pattern that matches the curved surface of the door.

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

[0072] 1021. A tapered cross-section structure is set in the top air duct, an deployable 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.

[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-blocking component in the pressure balancing unit.

[0074] 1023. Install a directional adjustment unit at the output end of the pressure balance unit. Calculate the deflection angle of the directional adjustment unit based on the position coordinates of the abnormal region in the three-dimensional thermal field model. Simultaneously, dynamically adjust the output airflow intensity of the directional adjustment unit according to the amplitude of the temperature difference.

[0075] Step 1023 may specifically include the following processes: A direction adjustment unit is installed at the output end of the pressure balancing unit; the position coordinates of the abnormal area in the three-dimensional thermal field model are extracted through the position analysis module to generate deflection angle control parameters that match the curvature of the door surface; the amplitude of the temperature difference is input into the intensity distribution module, and the adjustment ratio coefficient of the output airflow intensity is calculated based on the ratio between the temperature difference and a preset reference value; the deflection angle control parameters and the adjustment ratio coefficient are received through the servo drive unit, and the mechanical deflection angle of the direction adjustment unit and the output airflow pressure value are synchronously controlled; a feedback compensation loop is set between the direction adjustment unit and the pressure balancing unit, and the deflection angle control parameters and the adjustment ratio coefficient are dynamically corrected according to the real-time monitored airflow coverage uniformity and the amplitude change trend of the temperature difference, thereby realizing the 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 matching the curved surface of the door 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 duct, used to accelerate the airflow velocity; the deployable blade array refers to multiple sets of retractable guide vanes installed in the middle duct, which change the airflow distribution by adjusting the blade deployment angle; the negative pressure adsorption component refers to a vacuum generator connected to the end of the bottom 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 duct output end, with a built-in honeycomb flow obstruction component for homogenizing airflow pressure; the honeycomb flow obstruction component refers to a porous structure composed of hexagonal holes, which eliminates pressure fluctuations by increasing the airflow path resistance; 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 abnormal areas 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; 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 this embodiment, firstly, a tapered cross-section structure is designed in the top air duct in step 1021, and a pipe with a decreasing cross-sectional area and a taper of 15 degrees is used to accelerate the airflow; an array of 12 independently deployable blades is installed in the middle air duct, and the deployment angle of each blade is controlled by a stepper motor; a negative pressure adsorption component is integrated at the end of the bottom air duct and connected to a vacuum pump to generate a negative pressure environment of -5kPa; thus, the physical structure of the three-layer air duct system with independent control at the top, middle and bottom is completed.

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

[0080] Next, in step 1023, a direction adjustment unit is installed at the output 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 vane by combining it with the curvature equation of the door surface. 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℃. When the temperature difference reaches 30℃, it outputs 120% of the reference airflow intensity. The servo drive unit receives the deflection angle command and intensity coefficient and controls the rotation of the guide vane through a rotary encoder with a precision of 0.1°. It synchronously adjusts the speed of the variable frequency fan to achieve 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 drop does not reach the preset value within 10 seconds, it automatically increases the deflection angle by 3° and increases the airflow intensity 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 parameters. When the guide vane deflects at 45°, a fan-shaped coverage mode is formed with 120% of the reference airflow intensity; when it deflects at 30°, a focused jet mode is formed with 90% of the airflow intensity. Through the combination of multiple modes, an airflow coverage network matching the shape of the abnormal area of ​​the three-dimensional thermal field model is generated on the surface of the door, so as to achieve directional and precise control of the abnormal temperature area.

[0082] In practical applications, an intelligent airflow regulation system based on a three-dimensional thermal field model was constructed to address the need for uniform hot air coverage control in the curing oven for irregularly shaped door panels. The system consists of a top tapering air duct, a middle adjustable blade air duct, and a bottom negative pressure adsorption air duct. Each air duct layer ends with a 150mm thick aluminum honeycomb static pressure box, with an 8mm diameter hexagonal flow-blocking module inside to suppress airflow pressure fluctuations within ±50Pa. When a 3.2℃ temperature difference abnormality is detected in the wave area at the top of the door, the position analysis module calculates the radius of curvature of this area as 650mm based on the three-dimensional model coordinates (X: 1250mm, Y: 850mm). This drives the 304 stainless steel guide plate at the end of the top air duct to rotate at an angular velocity of 15° per second to a 32.5° deflection angle. Simultaneously, a PID algorithm increases the airflow intensity to 130% of the standard value. The folded blade array in the central air duct unfolds synchronously at a 45° angle, forming a conical airflow beam covering the waistline area of ​​the door. The bottom negative pressure air duct activates a 2.5kW centrifugal fan to ensure airflow adhesion along the decorative groove at the bottom edge of the door panel. Based on real-time monitoring of the 0.5°C temperature difference trend, the servo motor dynamically corrects the guide vane to an optimized angle of 28.7° within 2 seconds. Combined with the graded decrease in airflow intensity, this stabilizes the temperature fluctuation in the normal area within a ±0.8°C range. The synergistic effect of the three air ducts improves the uniformity of wind speed distribution on the door surface, effectively eliminating uneven curing defects caused by the complex structure.

[0083] In the complete solution of step 102 above, precise dynamic control of thermal anomalies on the door surface is achieved through the combination of a three-layer independent air duct system and intelligent airflow regulation. Its core lies in the differentiated structural design of the layered air ducts, combined with a tapered cross-section, blade array, and negative pressure adsorption technology, along with a static pressure chamber to stabilize airflow pressure, ensuring independent and precise control of airflow at each level. Through the coordinates and temperature difference data of the three-dimensional thermal field model, the angle of the guide vanes and the airflow intensity are dynamically driven, ensuring that the airflow coverage precisely matches the curved surface shape of the door. A real-time feedback compensation mechanism is incorporated, automatically correcting the control parameters based on the airflow coverage effect and temperature difference changes, effectively avoiding the delays and fluctuations of traditional systems. Ultimately, this results in an adaptive curved surface structure and a highly efficient airflow distribution mode with controllable intensity gradients, significantly improving the targeted temperature control accuracy and energy distribution balance in the thermal anomaly area.

[0084] 103. When the area ratio of the abnormal area exceeds the set ratio, the opening of the corresponding air duct damper is adjusted according to the hierarchical position based on the airflow coverage mode. At the same time, the incremental coefficient of the compensation air volume is calculated in combination with the temperature difference value amplitude, and a hierarchical compensation command is generated based on the incremental coefficient of the compensation air volume.

[0085] Step 103 may specifically include the following steps:

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

[0087] 1032. Based on the spatial 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 based on the product of the temperature difference value 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 containing the target air duct identifier, compensation air volume value and execution sequence through the hierarchical association rules preset in the compensation decision unit.

[0089] In the above steps, the area ratio refers to the proportion of the abnormal area to the total area of ​​the detection area at its level; the set ratio refers to the preset threshold for the area ratio of the abnormal area, which triggers the compensation mechanism when it is exceeded; the airflow coverage mode 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 spatial adjustment priority sequence refers to the duct adjustment order based on 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 air volume adjustment ratio calculated based on the temperature difference value; the compensation decision unit refers to the algorithm module that generates control commands according to preset rules; the hierarchical association rule refers to the linkage control strategy for air volume compensation between duct levels; and the hierarchical compensation command refers to the set of control commands that include the target duct identifier, compensation parameters and timing.

[0090] In this embodiment, step 1031 first monitors the area ratio of abnormal areas in each detection zone in real time. When the area ratio of the top zone exceeds 15%, the middle zone exceeds 20%, or the bottom zone exceeds 25%, a compensation mechanism is triggered. Based on the coordinate distribution density of abnormal areas in the three-dimensional thermal field model, the spatial weight coefficients of the top, middle, and bottom zones are calculated. The weight coefficients are arranged in descending order to generate a spatial adjustment priority sequence, and the zone with the highest priority enters the adjustment process first.

[0091] Secondly, in 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 is calculated as follows: Basic opening value = Base opening 30° × (18% / 15%), resulting in an opening adjustment of 36°. In the second stage, the incremental coefficient is calculated based on the temperature difference range. When the maximum temperature difference is detected to be 40°, the incremental coefficient = 40° / Base temperature difference 20° = 2.0. Finally, the compensation air volume value = Basic opening value 36° × Incremental coefficient 2.0 = 72° equivalent damper opening, thus achieving precise calculation of the compensation air volume in stages.

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

[0093] In practical applications, for example, in the intelligent temperature control system of a curing oven for irregularly shaped door panels, when the area of ​​an abnormal temperature zone on the door surface exceeds 15%, the system activates a graded airflow compensation mechanism. Taking a 2.5-meter-long embossed door panel with a curvature radius of 0.6 meters as an example, when an overheated area of ​​0.45 square meters appears in the top decorative pattern area, the spatial priority algorithm determines, based on the three-dimensional coordinates of the abnormal area, that the top tapered air duct needs to be adjusted first. 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%, simultaneously activating the auxiliary compensation mode of the middle air duct. In the second stage, based on a temperature difference of 7.2℃, the compensation airflow increment coefficient K = 18% × 7.2 = 1.3 is calculated, and the airflow in the top air duct is increased from the standard value of 3800 m³ / h. 3 / h increased to 4940m 3 / h, while the unfolding angle of the central folded blade array increases from 30° to 48° to enhance lateral airflow penetration. The compensation decision unit generates a command sequence within 0.8 seconds: first, it completes the adjustment of the top duct damper opening within 1.2 seconds; after a 0.5-second delay, it initiates central duct compensation; and finally, it links the bottom negative pressure adsorption fan power from 3.2kW to 4.8kW. Post-implementation monitoring shows that the abnormal area shrinks to 0.18㎡ within 6 seconds, the average temperature difference drops to +2.3℃, and the surface wind speed uniformity index recovers 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 >8%, using a fuzzy PID algorithm to improve the accuracy of the incremental coefficient to level 0.1, ensuring that the temperature field fluctuation during the curing process remains stable within the ±1.5℃ process requirement range.

[0094] In the complete scheme of step 103 above, the adaptive optimization and upgrade of the thermal field control system is achieved through the linkage design of the threshold triggering mechanism of the abnormal area proportion and the hierarchical compensation strategy. Its core lies in establishing a priority sequence for duct adjustment based on the mapping relationship between the airflow coverage pattern and the spatial position of the door when the abnormal area exceeds the limit. Through the coupling of dual parameters of area proportion and temperature difference amplitude, the damper opening is dynamically adjusted in stages: first, the basic opening is linearly set according to the area proportion, and then the incremental coefficient of the compensation airflow is calculated by superimposing the temperature difference amplitude, forming a step-by-step control strategy. Finally, through hierarchical association rules, the compensation coefficient is transformed into a compensation command containing target identifiers, airflow values, and timing logic, so that the airflow output intensity is accurately matched with the spatial distribution and thermodynamic characteristics of the thermal field anomaly. This significantly improves the airflow distribution efficiency and thermal balance response speed under large-area thermal anomaly conditions, ensuring the stable operation of the system under complex thermal field disturbances.

[0095] 104. Based on the execution status of the hierarchical compensation command and the trend of the incremental coefficient of the compensation air volume, when the temperature difference value at a specific location in the three-dimensional thermal field model exceeds the safety threshold, the corresponding heating source is cut off and the redundant cooling channel is switched to dissipate heat. 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 circuit is formed through the synchronous correction of the guide plate angle and the synergistic effect of the eddy current 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 hierarchical compensation command and the trend of the incremental coefficient of the compensation air volume in real time. When the rate of change of the incremental coefficient of the hierarchical compensation command exceeds the set threshold, activate the early warning detection mode.

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

[0099] 1043. The power supply circuit of the heating source corresponding to the target coordinate area is cut off by the multi-channel switching unit, and the redundant cooling channel and the main air duct system are switched to 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 incremental coefficient of the current compensation air volume, and the current rotation angle data of the guide plate is called simultaneously. The angle of the guide plate is corrected according to the coordinate position of the target area to adjust the direction of heat dissipation airflow.

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

[0102] Step 1045 may specifically include the following processes: calling the current rotation angle data of the guide vane, and directly calculating the deflection reference angle of the vortex suppression device in the static pressure box based on the geometric relationship between the current rotation angle data and the coordinate position of the target area; activating the deflection array in the vortex suppression device, and adjusting the deflection angle of each deflection in the array based on the deflection reference angle to eliminate pressure mutations related to the guide vane angle in the heat dissipation airflow path; inputting the current rotation angle data of the guide vane and the deflection angle of the deflection into the timing coordination control unit to generate a coordination control command that changes synchronously with the curvature of the door surface, and synchronously controlling the guide vane angle correction action and the deflection action of the vortex suppression device; through the periodic iteration of the coordination control command, ensuring that the direction of the heat dissipation airflow always maintains dynamic matching with the current rotation angle of the guide vane, and suppressing airflow separation phenomenon through the compensation adjustment of the deflection angle of the deflection.

[0103] In the above steps, the hierarchical compensation instruction refers to a set of control commands that include the target air duct identifier, compensation parameters, and timing; the incremental coefficient of the compensation air volume refers to the additional air volume adjustment ratio calculated based on the temperature difference range; the safety threshold refers to the preset temperature difference limit; the redundant cooling channel refers to the backup heat dissipation path connected in parallel with the main air duct; the guide vane angle correction refers to the mechanical adjustment process of adjusting the airflow direction according to the target area coordinates; the vortex suppression device in the static pressure box refers to the 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 coordination control unit refers to the instruction generation module that synchronizes the timing of multiple device actions; and the directional heat dissipation circuit refers to the airflow circulation path formed along the curvature of the door surface.

[0104] In this embodiment, firstly, step 1041 monitors the change trend of the incremental coefficient of the compensation air volume in the hierarchical compensation command in real time. When the incremental coefficient is detected to rise from 1.5 to 3.0 within 10 seconds, it is determined that the rate of change 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 to perform cluster analysis on the coordinate points where the temperature difference exceeds the safety threshold of 50°C. Then, the outline of the abnormal area is drawn by the edge tracking algorithm, and the expansion rate of the outline area is calculated. Finally, when the expansion rate of the area 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, in 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 with excessive temperature difference. First, the coordinate temperature data of the three-dimensional thermal field model is collected at a cycle of 0.5 seconds to identify the area where the temperature exceeds the standard for 5 consecutive cycles. Second, the regional boundary expansion vector is calculated by the image morphology processing algorithm. When the boundary expansion speed reaches 1.8 meters per minute, it is determined to be a risk of thermal runaway. Finally, a protection response trigger command containing the center coordinates of the target area, the risk level, and the diffusion direction angle is generated to prepare for the execution of emergency heat dissipation measures.

[0106] Next, the protection response trigger command is received in step 1043, and the heating source code corresponding to the target area is parsed. First, the physical location 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-channel switching unit. Second, the centrifugal fan unit 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, the heat dissipation intensity is adjusted based on the incremental coefficient of the current compensation air volume in step 1044; when the incremental coefficient is 3.0, the speed of the cooling fan in the redundant channel is increased to 300% of the reference value; first, the current rotation angle data of the guide vane is read. If the guide vane is in a 40° deflection state, it needs to be corrected to 48° according to the radius of curvature of the target area coordinates; second, the guide vane angle is adjusted at a rate of 8° per second by a high-precision servo motor; then, the airflow direction is monitored in real time by a laser Doppler velocimeter. When the airflow axis is detected to deviate from the center of the target area by more than 2°, the angle fine-tuning program is automatically triggered; finally, after the guide vane angle correction is completed, an airflow coverage verification report is generated and updated to the control system.

[0108] Finally, by calling the current angle data of the guide vane at 48° in step 1045 and combining it with the door curvature equation, the location of the airflow separation point in the static pressure box is calculated. First, the reference angle for the deflector deployment is determined to be 25°, and the corresponding 8 sets of deflector arrays in the vortex suppression device are activated. Second, a synchronization command is generated by the timing coordination control unit to ensure that the deflector angle correction action and the deflector deployment action are time-matched within 0.3 seconds. Then, the high-frequency pressure sensor is used to monitor the pressure change of the airflow path. When a local pressure surge exceeding 50Pa is detected, the deflector deployment angle is automatically increased to 28°. Finally, through the dynamic coordination of the deflector angle and the deflector deployment angle, a directional heat dissipation loop with a flow velocity of 12m / s and a coverage error of less than 1.5% is formed on the door surface to achieve efficient suppression of the thermal runaway region.

[0109] In practical applications, for example, in a temperature control system for curing irregularly shaped door panels, when an embossed aluminum door panel with a length of 3.2 meters and a curvature radius of R = 750 mm is detected to experience overheating for 120 seconds in the X:1500-1800 mm region, and the compensation air volume increment coefficient increases at a rate of 12% per minute, the system immediately cuts off the three sets of 18kW carbon fiber heating tubes in the corresponding region and simultaneously opens the DN50 solenoid valve of the redundant cooling channel to 75% opening, allowing -15℃ liquid carbon dioxide to be injected into the main air duct through the honeycomb static pressure box at a flow rate of 5.2 m / s. Based on the current compensation coefficient K = 1.8, the system increases the liquid CO2 injection pressure in the redundant channel to 0.45 MPa within 0.8 seconds, driving the top guide vane to rotate from 32° to a deflection angle of 47.5°. Simultaneously, it activates 12 sets of vortex suppression plates within the static pressure chamber: plates 1-6 vibrate at 150 Hz and expand to 55°, while plates 7-12 expand to 38° at 120 Hz, forming an involute airflow path matching the curvature of the door. Real-time feedback from a laser Doppler velocimeter dynamically corrects the guide vane angle and suppression plate expansion parameters every 200 ms. When a 0.3 m vortex is detected at X: 1650 mm... 2 During the airflow stripping zone, suppression plates No. 3 and No. 9 immediately compensated by expanding +8° and increasing the CO2 injection pressure to 0.52 MPa, causing the surface wind speed in that 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℃ to 178.6℃ within 9 seconds, with the temperature gradient stabilizing within ±1.2℃. 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 circuit and effectively preventing carbonization defects in the embossed texture caused by localized overheating.

[0110] In the complete scheme of step 105 above, an adaptive thermal management system with multiple safety guarantees is constructed through the deep integration of dynamic response to thermal anomalies and multi-level heat dissipation control. Its core innovation lies in cross-validating the trend of compensated airflow changes with real-time data from the three-dimensional thermal field model. When the temperature difference exceeds the limit, a smart switching mechanism that quickly cuts off the heating source and redundant cooling channels achieves a seamless transition from anomaly warning to active protection. The system precisely controls the heat dissipation intensity of redundant channels through dynamic mapping of the compensated airflow increment coefficient, and reconstructs the heat dissipation airflow path by combining the coordinated control of the guide vane angle correction and eddy current suppression device: on the one hand, based on the geometric relationship between the guide vane rotation angle and the target area coordinates, the airflow direction correction is calculated in real time; on the other hand, the dynamic deployment of the baffle array suppresses airflow separation and eliminates pressure surges. Under the iterative instructions of the time-series coordinated control unit, the heat dissipation airflow always forms a closed-loop directional circuit along the door curvature, ensuring both efficient accumulation of heat dissipation energy and 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 system reliability and thermal runaway protection capabilities under high-risk operating conditions.

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

[0112] In the intelligent curing control system for irregularly shaped door panels, for aluminum alloy door panels with a curvature radius of 0.8 meters and a wavy surface, the system achieves precise temperature field regulation through multi-dimensional collaborative control. When the door passes through a 185-degree Celsius curing oven at a constant speed of 0.6 meters per second, FLIR A8580 infrared thermal imager arrays deployed at 1.2-meter intervals on the side capture surface temperature data in real time at a scanning frequency of 25 Hz. A motion compensation algorithm eliminates the 0.3-millimeter-level image ghosting caused by door movement, accurately identifying a low-temperature anomaly area of ​​0.35 square meters with a temperature difference of ±7.2 degrees Celsius in the top wavy area. Based on the three-dimensional thermal field model generated by B-spline surface reconstruction technology, the system automatically marks the anomaly area as located within a curved surface region with a curvature radius of 650 millimeters and calculates that this area accounts for 18% of the total door surface area.

[0113] The system immediately activates the dynamic adjustment mechanism of the top tapered air duct. The 304 stainless steel guide plate rotates to a 32.5-degree deflection angle within 0.5 seconds, simultaneously increasing the airflow intensity to 130% of the standard value. The 12 sets of folded blade arrays in the middle air duct unfold at a 45-degree angle, forming a cone-shaped high-speed airflow jet covering the waistline area of ​​the door. The bottom negative pressure adsorption air duct starts a 2.5 kW centrifugal fan to enhance the airflow adhesion effect in decorative grooves with a depth exceeding 15 mm. When the area of ​​the abnormal zone does not drop to 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, and adjusts the opening of the top air damper to 72% in stages, increasing the airflow from the baseline value of 3800 cubic meters per hour to 4940 cubic meters per hour, while simultaneously increasing the unfolding angle of the middle blade array to 48 degrees.

[0114] When the temperature difference at coordinate X1350 mm exceeded the safety threshold of ±8.5 degrees Celsius, the system immediately cut off the three sets of carbon fiber heating tubes with a total power of 18 kW in the corresponding area and switched to the redundant cooling channel to perform directional heat dissipation. Liquid carbon dioxide was injected into the main air duct at a flow rate of 5.2 m / s through a DN50 solenoid valve, and the angle of the guide plate was simultaneously corrected to a deflection state of 47.5 degrees. The 12 sets of eddy current suppression plates in the static pressure box adopted an asymmetric control mode, with the first 6 sets of suppression plates deployed at 55 degrees and the last 6 sets deployed at 38 degrees, forming an involute airflow path that matched the curvature of the door. With a jet pressure of 0.45 MPa, the temperature in the target area dropped linearly from 192.3 degrees Celsius to 178.6 degrees Celsius within 9 seconds, and the surface wind speed uniformity was improved to 94%. Ultimately, the process target of a curing defect rate of less than 1.2% for irregularly shaped door panels and a temperature control accuracy of ±0.8 degrees Celsius was achieved. The servo motor responds to the feedback data from the laser Doppler velocimeter in real time, dynamically correcting the angle of the guide vane every 200 milliseconds to an accuracy of ±0.3 degrees. The vibration frequency of the eddy current suppression plate is precisely adjusted in 5 Hz increments to ensure that the airflow coverage dynamically matches the complex curved surface of the door.

[0115] Figure 3 This application provides a schematic diagram of the structure of a temperature control system for an automated production line of painted doors, as shown in the embodiment of the present application. Figure 3 As shown, the system includes:

[0116] The acquisition module 31 scans the temperature distribution data of the door surface in real time during movement, identifies abnormal areas where the temperature difference exceeds the set range by synchronously eliminating motion acquisition deviation, and generates a three-dimensional thermal field model containing position coordinates, temperature difference value and area ratio based on the temperature distribution data.

[0117] Elimination module 32 constructs a three-layer air duct system with independent adjustment at the top, middle and bottom. Static pressure boxes are set at the end of each layer of air duct to eliminate internal pressure fluctuations. Rotatable guide plates are configured at the output end of the static pressure boxes. The rotation angle and airflow intensity of the guide plates at the corresponding level 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.

[0118] The compensation module 33 adjusts the opening of the corresponding air duct damper according to the hierarchical position based on the airflow coverage mode when the area ratio of the abnormal area exceeds the set ratio. At the same time, it calculates the incremental coefficient of the compensation air volume in combination with the temperature difference value amplitude, and generates a hierarchical compensation command based on the incremental coefficient of the compensation air volume.

[0119] The correction module 34, based on the execution status of the hierarchical compensation command and the trend of incremental coefficient changes, cuts off the corresponding heating source and switches to the redundant cooling channel for heat dissipation when the temperature difference value at a specific location coordinate in the three-dimensional thermal field model exceeds the safety threshold. At the same time, it 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 circuit through the synchronous correction of the guide plate angle and the synergistic effect of the eddy current suppression device in the static pressure box.

[0120] Figure 3 The temperature control system for an automated production line of painted doors described above can perform... Figure 1 The implementation principle and technical effects of the temperature control method for an automated production line of painted doors described in the illustrated embodiment will not be repeated here. The specific operation methods of each module and unit in the temperature control system for an automated production line of painted doors described in the above embodiments have been described in detail in the embodiments related to this method, and will not be elaborated upon here.

[0121] In one possible design, Figure 3 The temperature control system for an automated production line of painted doors shown in the embodiment 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 invoked and executed by the processing component 42.

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

[0124] The processing component 42 may include one or more processors to execute computer instructions to complete all or part of the steps in the above-described method. Alternatively, the processing component may 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-described method.

[0125] 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 storage 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 storage, flash memory, magnetic disk, or optical disk.

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

[0127] Input / output interfaces provide interfaces between processing components and peripheral interface modules, which can be output devices, input devices, etc.

[0128] The communication components are configured to facilitate wired or wireless communication between computing devices and other devices.

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

[0130] This application also provides a computer storage medium storing a computer program, which, when executed by a computer, can perform the above-described functions. Figure 1 The embodiment shown illustrates a temperature control method for an automated production line for painted doors.

[0131] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing 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. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0133] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A temperature control method for an automated production line for painted doors, characterized in that, include: The temperature distribution data of the door surface is scanned in real time during movement. Abnormal areas with temperature differences exceeding the set range are identified by synchronously eliminating motion acquisition deviations. Based on the temperature distribution data, a three-dimensional thermal field model including position coordinates, temperature difference value and area ratio is generated. A three-layer air duct system with independent adjustments at the top, middle, and bottom is constructed. A static pressure box is installed at the end of each layer to eliminate internal pressure fluctuations. A rotatable guide vane is configured at the output end of the static pressure box. The rotation angle and airflow intensity of the guide vane at the corresponding layer are dynamically adjusted based on the position coordinates and temperature difference values ​​in the three-dimensional thermal field model, forming an airflow coverage pattern that matches the curved surface of the door, including: A tapered cross-section structure is set in the top air duct, an deployable blade array is installed in the middle air duct, and a negative pressure adsorption component is connected at the end of the bottom air duct to construct a three-layer air duct system with independent adjustment of the top, middle and bottom. Connect the output end of each layer of air duct to the pressure balancing unit, and eliminate pressure fluctuations inside the air duct through the honeycomb flow-blocking component in the pressure balancing unit. A directional adjustment unit is installed at the output end of the pressure balancing unit. Based on the position coordinates of the abnormal region in the three-dimensional thermal field model, the deflection angle of the directional adjustment unit is calculated. Simultaneously, the output airflow intensity of the directional adjustment unit is dynamically adjusted according to the magnitude of the temperature difference, including: A direction adjustment unit is installed at the output end of the pressure balance unit. The position coordinates of the abnormal area in the three-dimensional thermal field model are extracted by the position analysis module to generate deflection angle control parameters that match the curvature of the door surface. The amplitude of the temperature difference is input into the intensity distribution module, and the adjustment ratio coefficient of the output airflow intensity is calculated based on the ratio between the temperature difference and the preset reference value. The servo drive unit receives the deflection angle control parameters and adjustment ratio coefficient, and synchronously controls the mechanical deflection angle and 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. Based on the real-time monitoring of the airflow coverage uniformity and the amplitude change trend of the temperature difference, the deflection angle control parameter and the adjustment ratio coefficient are dynamically corrected to realize the dynamic adjustment of the output airflow intensity. The combination of the deflection angle of the direction adjustment unit and the output airflow intensity forms an airflow coverage pattern that matches the curved surface of the door. When the area of ​​the abnormal region exceeds the set proportion, the opening of the corresponding air duct damper is adjusted according to the hierarchical position based on the airflow coverage mode. At the same time, the incremental coefficient of the compensation air volume is calculated in combination with the temperature difference value amplitude, and a hierarchical compensation command is generated based on the incremental coefficient of the compensation air volume. Based on the execution status of the hierarchical compensation command and the trend of the incremental coefficient of the compensation air volume, when the temperature difference at a specific location in the three-dimensional thermal field model exceeds the safety threshold, the corresponding heating source is cut off and the system switches to the redundant cooling channel for heat dissipation. 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 circuit is formed through the synchronous correction of the guide plate angle and the synergistic effect of the eddy current suppression device in the static pressure box.

2. The method according to claim 1, characterized in that, Based on the execution status of the hierarchical compensation command and the trend of the incremental coefficient of the compensation airflow, when the temperature difference at a specific location in the three-dimensional thermal field model exceeds a safety threshold, the corresponding heating source is cut off and the system switches to a redundant cooling channel for heat dissipation. Simultaneously, the heat dissipation intensity of the redundant channel is adjusted based on the incremental coefficient of the compensation airflow. A directional heat dissipation loop is formed through the synchronous correction of the guide vane angle and the synergistic effect of the eddy current suppression device within the static pressure box, including: The execution status of the hierarchical compensation command and the trend of the incremental coefficient of the compensation air volume are monitored in real time. When the rate of change of the incremental coefficient of the hierarchical compensation command exceeds the set threshold, the early warning detection mode is activated. In the early warning detection mode, the coordinate region in the three-dimensional thermal field model where the temperature difference value continuously exceeds the standard is tracked by boundary. When the rate of expansion of the tracked region exceeds the set safety threshold, a protection response is triggered. The power supply circuit of the heating source corresponding to the target coordinate area is cut off by the multi-channel switching unit, and the redundant cooling channel and the main air duct system are switched to 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 incremental coefficient of the current compensation air volume, and the current rotation angle data of the guide plate is called simultaneously. The angle of the guide plate is corrected according to the coordinate position of the target area to adjust the direction of heat dissipation airflow. The vortex suppression device inside the static pressure box is activated synchronously to eliminate pressure changes in the airflow path. Through the timing coordination control of the guide plate angle correction and the vortex suppression device, the heat dissipation airflow forms a directional circulation loop along the curvature of the door surface.

3. The method according to claim 2, characterized in that, The vortex suppression device inside the static pressure box is activated synchronously to eliminate pressure abrupt changes in the airflow path. Through the coordinated control of the guide vane angle correction and the vortex suppression device's timing, the cooling airflow forms a directional circulation loop along the curvature of the door surface, including: The current rotation angle data of the guide vane is called, and the reference angle for the deployment of the vortex suppression device in the static pressure box is directly calculated based on the geometric relationship between the current rotation angle data and the coordinate position of the target area. Activate the spoiler array in the eddy current suppression device, and adjust the deployment angle of each spoiler in the array based on the spoiler deployment reference angle to eliminate pressure abrupt changes in the heat dissipation airflow path related to the guide plate angle; The current rotation angle data of the guide vane and the deployment angle of the spoiler are input into the timing coordination control unit to generate a coordination control command that changes synchronously with the curvature of the door surface, and synchronously control the guide vane angle correction action and the spoiler deployment action of the eddy current suppression device. Through the periodic iteration of the coordinated control commands, the direction of the cooling airflow is always dynamically matched with the current rotation angle of the guide vane, while the airflow separation phenomenon is suppressed by the compensation adjustment of the deflector deployment angle.

4. The method according to claim 1, characterized in that, The system scans the temperature distribution data of the door surface in real time, identifies abnormal areas where temperature differences exceed a set range by synchronously eliminating motion acquisition deviations, and generates a three-dimensional thermal field model based on the temperature distribution data, including location coordinates, temperature difference values, and area percentages. 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 a pulse-triggered mode. The continuously collected surface temperature data is input into the spatial conversion unit, and the motion distortion of the scanned data is corrected by the speed feedback signal of the dynamic tracking module to generate temperature distribution data that matches the geometry of the door surface. The temperature distribution data is divided into hierarchical detection areas. The temperature difference fluctuation amplitude is calculated based on the dispersion of temperature values ​​within the hierarchical detection areas. Areas where the temperature difference fluctuation amplitude exceeds a set threshold are selected and marked as abnormal areas. The location coordinates, temperature difference, and area ratio of the abnormal region 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.

5. The method according to claim 1, characterized in that, When the area of ​​the abnormal region exceeds a set proportion, the opening of the corresponding air duct damper is adjusted according to the hierarchical position based on the airflow coverage pattern. Simultaneously, an incremental coefficient for compensating airflow is calculated based on the temperature difference amplitude, and a hierarchical compensation command is generated based on this incremental coefficient, including: When the area of ​​the abnormal region exceeds a set proportion, the spatial adjustment priority sequence of the target air duct is determined according to the correspondence between the hierarchical position in the airflow coverage mode and the door surface. Based on the spatial 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 based on the product of the temperature difference 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 containing the target air duct identifier, the compensation air volume value and the execution sequence is generated through the hierarchical association rules preset in the compensation decision unit.

6. 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 surface in real time during movement, identifies abnormal areas where the temperature difference exceeds the set range by synchronously eliminating motion acquisition deviation, and generates a three-dimensional thermal field model containing position coordinates, temperature difference value and area ratio based on the temperature distribution data. The system employs an elimination module to construct a three-layer air duct system with independent adjustments at the top, middle, and bottom. A static pressure box is installed at the end of each duct layer to eliminate internal pressure fluctuations. A rotatable guide vane is configured at the output end of the static pressure box. The rotation angle and airflow intensity of the guide vane at each layer are dynamically adjusted based on the position coordinates and temperature difference values ​​in the three-dimensional thermal field model, forming an airflow coverage pattern that matches the curved surface of the door. This includes: A tapered cross-section structure is set in the top air duct, an deployable blade array is installed in the middle air duct, and a negative pressure adsorption component is connected at the end of the bottom air duct to construct a three-layer air duct system with independent adjustment of the top, middle and bottom. Connect the output end of each layer of air duct to the pressure balancing unit, and eliminate pressure fluctuations inside the air duct through the honeycomb flow-blocking component in the pressure balancing unit. A directional adjustment unit is installed at the output end of the pressure balancing unit. Based on the position coordinates of the abnormal region in the three-dimensional thermal field model, the deflection angle of the directional adjustment unit is calculated. Simultaneously, the output airflow intensity of the directional adjustment unit is dynamically adjusted according to the magnitude of the temperature difference, including: A direction adjustment unit is installed at the output end of the pressure balance unit. The position coordinates of the abnormal area in the three-dimensional thermal field model are extracted by the position analysis module to generate deflection angle control parameters that match the curvature of the door surface. The amplitude of the temperature difference is input into the intensity distribution module, and the adjustment ratio coefficient of the output airflow intensity is calculated based on the ratio between the temperature difference and the preset reference value. The servo drive unit receives the deflection angle control parameters and adjustment ratio coefficient, and synchronously controls the mechanical deflection angle and 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. Based on the real-time monitoring of the airflow coverage uniformity and the amplitude change trend of the temperature difference, the deflection angle control parameter and the adjustment ratio coefficient are dynamically corrected to realize the dynamic adjustment of the output airflow intensity. The combination of the deflection angle of the direction adjustment unit and the output airflow intensity forms an airflow coverage pattern that matches the curved surface of the door. The compensation module adjusts the opening of the corresponding air duct damper according to the hierarchical position based on the airflow coverage mode when the area ratio of the abnormal area exceeds the set ratio. At the same time, it calculates the incremental coefficient of the compensation air volume based on the temperature difference value amplitude and generates a hierarchical compensation command based on the incremental coefficient of the compensation air volume. The correction module, based on the execution status of the hierarchical compensation command and the trend of incremental coefficient changes, cuts off the corresponding heating source and switches to redundant cooling channels for heat dissipation when the temperature difference at a specific location in the three-dimensional thermal field model exceeds a safety threshold. At the same time, it adjusts the heat dissipation intensity of the redundant channels based on the incremental coefficient of the compensation air volume, and forms a directional heat dissipation loop through the synchronous correction of the guide plate angle and the synergistic effect of the eddy current suppression device in the static pressure box.

7. A computing device, characterized in that, It includes a processing component and a storage component; the storage component stores one or more computer instructions; the one or more computer instructions are invoked and executed by the processing component to implement the temperature control method for an automated production line of painted doors as described in any one of claims 1 to 5.

8. A computer storage medium, characterized in that, The device contains a computer program that, when executed by a computer, implements a temperature control method for an automated production line for painted doors as described in any one of claims 1 to 5.

Images