A vehicle heat distortion detection system, method, and vehicle
By using blue light scanning equipment and a temperature control system, non-contact, automated, and visual detection of thermal deformation of vehicle plastic shells has been achieved, solving the problem of low accuracy in traditional methods and improving the accuracy and efficiency of detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING CHANGAN AUTOMOBILE CO LTD
- Filing Date
- 2026-03-24
- Publication Date
- 2026-05-29
Smart Images
Figure CN122107977A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vehicle technology, and specifically to a vehicle thermal deformation detection system, method, and vehicle. Background Technology
[0002] With the development of the new energy vehicle industry, the market has increasingly stringent requirements for the refinement of vehicle appearance and overall performance. Plastic shells and decorative parts are widely used in automotive exteriors due to their advantages of being lightweight, easy to mold, and able to enhance the appearance. However, automobiles are exposed to complex environmental conditions over a long period of time, and extreme high and low temperatures can easily cause thermal deformation of the vehicle's plastic shell, affecting its appearance integrity, assembly accuracy, and operational stability. Therefore, testing and evaluating the thermal deformation performance of plastic shells is crucial during the design phase, and accurately detecting the amount of thermal deformation of plastic shells is key to solving current testing pain points, ensuring product quality, and enhancing market competitiveness.
[0003] Currently, the detection of thermal deformation of vehicle plastic shells mainly relies on special gauges or steel rulers. These traditional methods have obvious limitations, which directly lead to low accuracy in the detection of thermal deformation of vehicle plastic shells: the special gauges have a fixed structure and cannot accurately quantify the amount of thermal deformation of complex curved plastic shells; moreover, the gauges are mostly made of metal, and their own thermal expansion and contraction characteristics will further interfere with the detection results, thereby reducing the accuracy of thermal deformation detection. Summary of the Invention
[0004] This invention provides a vehicle thermal deformation detection system, method, and vehicle, aiming to solve the technical problem of how to accurately detect the thermal deformation of a vehicle's plastic shell.
[0005] In a first aspect, this application provides a vehicle thermal deformation detection system, comprising: a blue light scanning device; the blue light scanning device includes: a scanning unit and a thermal deformation detection unit; wherein, the scanning unit and the thermal deformation detection unit are communicatively connected; the scanning unit is used to scan the exterior parts of the vehicle to obtain a three-dimensional blue light image, and send it to the thermal deformation detection unit; the three-dimensional blue light image is used to characterize the distance between key points in the exterior parts and the blue light scanning device; the thermal deformation detection unit is used to perform thermal deformation detection on the exterior parts based on the three-dimensional blue light image and a reference blue light image of the exterior parts at a reference temperature.
[0006] Based on the aforementioned technical means, non-contact optical scanning of exterior parts using the scanning unit in the blue light scanning device can quickly and accurately acquire three-dimensional morphological data of the part surface, generating a complete three-dimensional blue light image. This avoids scratches and damage to the workpiece surface caused by traditional contact measurements, while significantly improving detection efficiency and data integrity. The thermal deformation detection unit then compares and analyzes the measured three-dimensional blue light image with a reference blue light image, achieving automated, visualized, and quantitative detection of the degree of thermal deformation of exterior parts. This effectively improves the accuracy, stability, and reliability of thermal deformation detection, providing accurate and efficient technical support for dimensional quality control, thermal deformation analysis, and structural optimization of vehicle plastic exterior parts.
[0007] Furthermore, the thermal deformation detection unit is specifically used for: determining the deformation of key points based on the three-dimensional blue light image and the reference blue light image; constructing a three-dimensional deviation chromatogram of the exterior parts based on the deformation; encoding one deformation by one color in the three-dimensional deviation chromatogram; and performing thermal deformation detection on the exterior parts based on the three-dimensional deviation chromatogram.
[0008] Based on the above technical means, by converting the key point deformation variables into a three-dimensional deviation chromatogram, the thermal deformation distribution can be visualized, quantified, and displayed globally and intuitively, which facilitates the rapid identification of deformation size, region, and trend. At the same time, color coding corresponding to the deformation variables can significantly improve detection efficiency and interpretation accuracy, reduce the difficulty of manual analysis, and provide intuitive and reliable data for the thermal deformation assessment, structural optimization, and quality verification of vehicle exterior parts.
[0009] Furthermore, the thermal deformation detection unit is specifically used to: place the three-dimensional blue light image and the reference blue light image in the same spatial coordinate system; determine the first position of the key point in the three-dimensional blue light image in the spatial coordinate system; determine the second position of the matching point in the reference blue light image that is closest to the key point in the three-dimensional blue light image in the spatial coordinate system; and use the straight-line distance between the first position and the second position as the deformation of the key point.
[0010] Based on the above technical means, merging the three-dimensional blue light image and the reference blue light image into the same spatial coordinate system can simplify the comparison between the three-dimensional blue light image and the reference blue light image. Thus, by using the position of key points in the three-dimensional blue light image and the reference blue light image, the deformation of key points can be determined more accurately and quickly, thereby improving the accuracy of thermal deformation detection of exterior parts.
[0011] Furthermore, the vehicle thermal deformation detection system also includes: a display unit; the display unit is communicatively connected to the thermal deformation detection unit; the display unit is used to display a three-dimensional deviation chromatogram and thermal deformation detection results.
[0012] Based on the above technical means, the display unit can intuitively display the three-dimensional deviation chromatogram and the thermal deformation detection results, which facilitates understanding and subsequent optimization of appearance components.
[0013] Furthermore, the display unit is specifically used to mark key deformation features in the three-dimensional deviation chromatogram to display the thermal deformation detection results; wherein, the key deformation features include: the maximum deformation key point, the minimum deformation key point, and at least one of the deformation key point regions.
[0014] Based on the above technical means, by marking key deformation features such as the maximum deformation key point, the minimum deformation key point, and the deformation concentration area in the three-dimensional deviation chromatogram, the thermal deformation detection results can be displayed intuitively, clearly, and prominently. This facilitates the rapid location of the deformation extreme value and deformation distribution of the parts, greatly improves the readability and judgment efficiency of the detection results, and enables accurate identification and intuitive evaluation of thermal deformation defects.
[0015] Furthermore, the display unit is specifically used to display the deformation anomaly key point area and the deformation of key points in the deformation anomaly key point area, so as to display the thermal deformation detection results.
[0016] Based on the above-mentioned technical means, by displaying the deformation of abnormal areas and corresponding key points, it is possible to accurately locate unqualified areas, intuitively quantify the degree of deformation, realize the automatic identification and accurate judgment of thermal deformation defects, and effectively improve the accuracy and efficiency of detection.
[0017] Furthermore, the vehicle thermal deformation detection system also includes: a temperature detection device; the temperature detection device is communicatively connected to the display unit; the temperature detection device is used to detect the component temperature of the exterior parts and send it to the display unit; the display unit is also used to bind and display the component temperature with a three-dimensional deviation chromatogram to facilitate the optimization of the exterior parts.
[0018] Based on the above technical means, by binding the component temperature with the three-dimensional deviation chromatogram, the synchronous correlation display of temperature-deformation data can be realized, which intuitively reflects the thermal deformation law of appearance parts under different temperature conditions. This facilitates the accurate analysis of the influence mechanism of temperature on deformation, and provides complete and reliable data basis for the material selection, structural design and process optimization of appearance parts, effectively improving the optimization efficiency and accuracy.
[0019] Furthermore, the vehicle thermal deformation detection system also includes: a temperature control device; the temperature control device is communicatively connected to the temperature detection device; the temperature control device is used to heat or cool the exterior parts and to send temperature detection commands for the exterior parts to the temperature detection device; the temperature control device is also used to stop heating or cooling when the component temperature returned by the temperature detection device meets preset conditions; wherein, the preset conditions include: the component temperature reaches the target temperature; or, the duration for which the component temperature reaches the target temperature is greater than or equal to a preset duration.
[0020] Based on the above technical means, the temperature control equipment and the temperature detection equipment form a closed-loop temperature control, which can accurately realize the heating and cooling of the appearance parts, and automatically stop the temperature control after the part temperature reaches the target temperature or meets the stability time. This can ensure that the parts reach thermal equilibrium in a stable, uniform and controllable temperature environment, effectively avoid the interference of temperature fluctuations on the thermal deformation detection results, and significantly improve the consistency, accuracy and repeatability of thermal deformation detection.
[0021] Furthermore, the vehicle thermal deformation detection system also includes: an isolation device and a gas conversion device; the isolation device is used to isolate the exterior parts from contact with the external environment; the gas conversion device is used to inject inert gas into the cavity formed by the isolation device and the exterior parts to suppress light interference and water vapor interference from blue light scanning.
[0022] Based on the above technical means, by setting up isolation equipment and gas conversion equipment, the contact between the tested parts and the external environment can be effectively isolated, reducing interference factors such as external temperature and airflow; at the same time, injecting inert gas into the inner cavity can suppress optical interference such as water vapor condensation and light scattering, providing a stable, clean, and unobstructed detection environment for blue light scanning, thereby ensuring the accuracy and reliability of three-dimensional scanning data and improving the accuracy and stability of thermal deformation detection results.
[0023] Secondly, this application provides a vehicle thermal deformation detection method, applied to the thermal deformation detection unit of the vehicle thermal deformation detection system described in the first aspect above. The vehicle thermal deformation detection method includes: performing thermal deformation detection on the exterior parts based on a three-dimensional blue light image and a reference blue light image corresponding to the exterior parts of the vehicle at a reference temperature; wherein, the three-dimensional blue light image is a three-dimensional blue light image obtained and transmitted by the scanning unit by scanning the exterior parts with blue light; the three-dimensional blue light image is used to characterize the distance between key points in the exterior parts and the blue light scanning device.
[0024] Thirdly, this application provides a vehicle that uses the vehicle thermal deformation detection system described in the first aspect to detect the thermal deformation of its exterior components.
[0025] Fourthly, this application provides an electronic device comprising: a processor and a memory; the memory storing processor-executable instructions. When the processor is configured to execute the instructions, the electronic device implements the method described in the second aspect.
[0026] Fifthly, this application provides a computer-readable storage medium storing computer program instructions that, when executed by a processor, implement the method described in the second aspect.
[0027] In a sixth aspect, this application provides a computer program product comprising computer program instructions that, when executed by a processor, implement the method described in the second aspect.
[0028] It should be noted that the technical effects of any of the implementation methods in aspects two through six can be found in the technical effects of the corresponding implementation methods in aspect one, and will not be repeated here.
[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0030] Figure 1 A system architecture diagram of a vehicle thermal deformation detection system provided by the present invention; Figure 2 A system architecture diagram of another vehicle thermal deformation detection system provided by the present invention; Figure 3 A system architecture diagram of another vehicle thermal deformation detection system provided by the present invention; Figure 4 A system architecture diagram of another vehicle thermal deformation detection system provided by the present invention; Figure 5 This is a structural diagram of an electronic device provided by the present invention.
[0031] Figure label: 110 - Blue light scanning equipment, 120 - Display unit, 130 - Temperature detection equipment, 140 - Temperature control equipment, 150 - Isolation equipment, and 160 - Gas conversion equipment. Detailed Implementation
[0032] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.
[0033] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0034] For ease of understanding, the vehicle thermal deformation detection system provided in this application will be described in detail below with reference to the accompanying drawings.
[0035] In some embodiments, such as Figure 1 As shown, the vehicle thermal deformation detection system includes: a blue light scanning device 110.
[0036] The blue light scanning device 110 includes a scanning unit and a thermal deformation detection unit; wherein the scanning unit and the thermal deformation detection unit are communicatively connected.
[0037] As a feasible implementation method, the scanning unit is used to scan the exterior parts of the vehicle to obtain a three-dimensional blue light image, which is then sent to the thermal deformation detection unit.
[0038] The three-dimensional blue light image is used to characterize the distance between key points in the exterior components and the blue light scanning device 110, and can reflect the shell shape of the exterior components at the target temperature, where the target temperature can be greater than or less than the reference temperature. For example, the target temperature can be 50℃, 80℃, 100℃, 0℃, -20℃, or -40℃.
[0039] In this embodiment, the exterior components are preferably vehicle plastic trim parts or plastic shell parts.
[0040] In an exemplary embodiment, the scanning unit can perform omnidirectional scanning of vehicle exterior components from multiple perspectives. The raw point cloud data obtained from the scan is sequentially subjected to noise reduction, filtering, and simplification processing to remove environmental noise and scanning noise, thereby optimizing the point cloud data quality. For multiple sets of point cloud data acquired from multiple angles, the Iterative Closest Point (ICP) algorithm or its improved algorithm is used for automatic and precise stitching, fusing them to generate a complete, distortion-free three-dimensional digital model, i.e., a three-dimensional blue light image.
[0041] For example, noise reduction, filtering, and simplification can be achieved by: removing outliers far from the main point cloud through statistical filtering, optimizing the continuity of the point cloud surface through smoothing filtering, and simplifying the point cloud data using a voxel grid downsampling method, thereby reducing data redundancy and improving the efficiency of subsequent processing while preserving the morphological features of the parts.
[0042] The method for determining a 3D blue light image may include: using a point cloud from a certain perspective as the reference data, spatially registering point clouds from other perspectives through rotation and translation, iteratively optimizing the objective function to minimize the distance deviation between point clouds from different perspectives, thereby completing the precise alignment and fusion of multiple sets of point clouds and constructing a unified, complete, and high-precision 3D blue light model.
[0043] Specifically, from multiple sets of point clouds acquired through multi-view scanning, a set with scanning angles covering the core area of the component, uniform point cloud density, and no significant noise is selected as the baseline data. The point clouds from the remaining views are used as the point clouds to be registered. Simultaneously, rotation matrices and translation vectors are initialized, and a convergence threshold and maximum number of iterations for the objective function are set. Based on the initialized rotation matrices and translation vectors, rotation and translation transformations are performed on each point cloud to be registered to adjust its spatial orientation, achieving initial alignment between the point cloud to be registered and the baseline point cloud. Using the Iterative Closest Point (ICP) algorithm or its improved version, corresponding point pairs between each point cloud to be registered and the baseline point cloud are searched based on the initially aligned point cloud data. The distance deviation between corresponding point pairs is calculated and substituted into the preset objective function (with the minimum sum of squared distance deviations between corresponding point pairs as the optimization objective). By iteratively updating the rotation matrix and translation vectors, the objective function value is continuously optimized until the distance deviation reaches the preset convergence threshold or the number of iterations reaches the maximum threshold, at which point the iteration stops. The multiple sets of point cloud data that have been precisely aligned after iterative optimization are seamlessly fused, and overlapping and redundant points that occur during the fusion process are removed, while the complete morphological features of the vehicle's exterior components are preserved. Based on the fused point cloud data, meshing is performed to finally construct a unified, complete, and high-precision 3D blue light image.
[0044] It should be noted that multi-view scanning can be either a single blue light scanning device 110 moving or changing position to complete scanning from multiple different perspectives sequentially, or multiple blue light scanning devices 110 being arranged simultaneously to scan synchronously from different perspectives.
[0045] In the exemplary embodiment, the scanning unit specifically employs a blue light 3D scanner. The blue light 3D scanner is a high-precision non-contact measurement device based on the principle of blue light structured light imaging, and it mainly includes a blue light emitting module, an image acquisition module, a control circuit, and a data processing unit.
[0046] Specifically, the blue light emitting module projects an coded blue light structured light field onto the surface of the component being measured. After being modulated by the surface morphology of the component, the image acquisition module acquires the deformed stripe image. The control circuit conditions and converts the acquired light intensity and position signals from analog to digital to generate raw measurement data containing spatial position information. The wavelength of the blue light emitted by the blue light emitting module can be selected from 380–450 nm.
[0047] After receiving the raw measurement data, the data processing unit uses the principles of triangulation and phase calculation to invert the three-dimensional point cloud information of the surface of the measured object. Then, through multi-view point cloud registration, fusion, and mesh reconstruction, it generates a complete and high-precision three-dimensional blue light image of the exterior components.
[0048] It should be understood that the measurement principle of the blue light 3D scanner is not affected by changes in ambient temperature, which can avoid the systematic errors caused by thermal expansion and contraction of traditional metal inspection tools; at the same time, the detection accuracy can reach 0.02mm, which can meet the stringent requirements of high-precision dimensional inspection and thermal deformation quantitative analysis of plastic parts on the vehicle exterior.
[0049] Optionally, the blue light 3D scanner may also include a filter for filtering out ambient stray light, high-temperature radiation light, and other band interference light to improve the signal-to-noise ratio and measurement stability of image acquisition.
[0050] As a feasible implementation method, after receiving the three-dimensional blue light image sent by the scanning unit, the thermal deformation detection unit is used to perform thermal deformation detection on the appearance parts based on the three-dimensional blue light image and the reference blue light image corresponding to the appearance parts at the reference temperature.
[0051] The reference temperature can be room temperature. The reference blue light image can reflect the shape and structure of the exterior components at room temperature. The room temperature can be 25°C.
[0052] In the exemplary embodiment, the thermal deformation detection unit registers the three-dimensional blue light image acquired at the target temperature with the reference blue light image corresponding to the exterior component at the reference temperature in the same coordinate system, and compares the three-dimensional coordinates, morphological data and spatial deviations of the corresponding positions in the unified coordinate system point by point. Based on the coordinate differences and morphological deviations, the degree of thermal deformation of the exterior component is determined, thereby realizing the thermal deformation detection of the exterior component.
[0053] It should be understood that since the appearance components at the reference temperature and the target temperature use the same clamping and positioning method, the three-dimensional blue light images obtained at different temperatures can be compared in the same coordinate system.
[0054] For example, the thermal deformation detection unit includes a backend server, which is used to receive the three-dimensional blue light model uploaded by the scanning unit, perform coordinate system I, registration and alignment, three-dimensional deviation calculation and thermal deformation degree analysis of the model at different temperatures, and output the thermal deformation detection results.
[0055] As a feasible implementation method, the thermal deformation detection unit is specifically used for: determining the deformation of key points based on the three-dimensional blue light image and the reference blue light image; constructing a three-dimensional deviation chromatogram of the exterior parts based on the deformation; encoding one deformation by one color in the three-dimensional deviation chromatogram; and performing thermal deformation detection on the exterior parts based on the three-dimensional deviation chromatogram.
[0056] Among them, the deformation of key points is used to characterize the spatial deformation value generated by any sampling point on the surface of the exterior component under temperature load.
[0057] As a feasible implementation method, the thermal deformation detection unit is specifically used to: place the three-dimensional blue light image and the reference blue light image in the same spatial coordinate system; determine the first position of the key point in the three-dimensional blue light image in the spatial coordinate system; determine the second position of the matching point in the reference blue light image that is closest to the key point in the three-dimensional blue light image in the spatial coordinate system; and use the straight-line distance between the first position and the second position as the deformation of the key point.
[0058] In an exemplary embodiment, multiple three-dimensional images (such as three-dimensional blue light images and reference blue light images) obtained by scanning at different temperatures are unified to the same spatial coordinate system through best-fit alignment (such as based on reference points, local features, or global surfaces).
[0059] For example, using a reference blue light image at a reference temperature as a reference, the three-dimensional blue light model at the target temperature is rotated, translated, and its posture optimized to achieve high-precision alignment between the two in the positioning area, eliminating systematic deviations caused by clamping and scanning positions, and ensuring the accuracy and reliability of thermal deformation detection results.
[0060] Specifically, using the reference blue light model obtained at the reference temperature as a reference template, the corresponding feature points, feature surfaces, or overall surface information of the reference blue light model and the three-dimensional blue light model at the target temperature are extracted in the clamping and positioning area, structural feature area, or part rigidity invariant area. By performing rotation, translation, and attitude fine-tuning on the three-dimensional blue light model at the target temperature, the two sets of models achieve the best fit and alignment in the above-mentioned rigidity invariant area. The distance deviation between corresponding points of the two sets of models is iteratively optimized until the deviation is less than a preset threshold, thereby accurately unifying the three-dimensional blue light model at the target temperature into the coordinate system of the reference model, effectively eliminating the influence of non-temperature factors such as clamping error and scanning position deviation, and ensuring that the subsequent thermal deformation detection results are true, accurate, and reliable.
[0061] In an exemplary embodiment, after unifying the 3D Blu-ray image and the reference Blu-ray image to the same coordinate system and completing high-precision registration and alignment, using the first position of a key point in the 3D Blu-ray image as a reference, the second position of the closest matching point to the first position is found in the reference Blu-ray image. The straight-line distance between the first and second positions is taken as the deformation of the key point. By comparing the registered and aligned 3D Blu-ray image under high temperature or low temperature conditions with the reference Blu-ray image at room temperature point by point, the spatial position change of each key point on the surface of the exterior component, i.e., the deformation, can be accurately calculated.
[0062] In an exemplary embodiment, the three-dimensional deviation chromatogram can intuitively and quantitatively display the thermal deformation distribution of the entire surface of the exterior component using different colors. For example, red can be used to represent positive deformation (convexity), and blue can be used to represent negative deformation (concavity). The magnitude of the deformation can be reflected by changes in color depth or gradation, thereby achieving an intuitive, visual, and quantitative expression of the thermal deformation results.
[0063] It should be understood that by converting discrete and abstract deformation values into continuous and intuitive color distributions, the magnitude, direction, and distribution patterns of thermal deformation at various points on the surface of exterior components can be displayed in a visual, global, and quantitative manner. This facilitates the rapid identification of areas of concentrated deformation, locations of maximum deformation, and deformation trends by inspection personnel, thereby enabling efficient determination and accurate assessment of the degree of thermal deformation of vehicle plastic exterior components.
[0064] In the exemplary embodiment, the maximum and minimum values of thermal deformation on the surface of the exterior components, the deformation distribution area, and the overall deformation trend can be intuitively displayed through a three-dimensional deviation chromatogram. Based on the color distribution and color gradation changes presented by the chromatogram, the deformation concentration area and abnormal deformation location of the components can be located, and it can be determined whether the thermal deformation exceeds the design allowable range.
[0065] Optionally, based on the three-dimensional deviation chromatogram, key features such as the spacing of mounting holes, edge contour, and surface curvature on the appearance parts are extracted, the dimensional changes of the above features under different temperature environments are calculated, and the specific deformation values corresponding to the key features are output. Finally, a complete and detailed thermal deformation analysis report is generated, thereby realizing the quantitative detection and comprehensive evaluation of the degree of thermal deformation of the appearance parts.
[0066] It should be understood that using three-dimensional deviation chromatograms for thermal deformation detection not only enables the visualization of deformation results, but also allows for the automatic extraction of key features and the accurate output of deformation data. This effectively improves the intuitiveness, accuracy, and efficiency of thermal deformation detection, providing reliable data support for the structural optimization, material selection, and quality verification of vehicle plastic exterior parts.
[0067] In some embodiments, to visually display the detection results, such as Figure 2 As shown, the vehicle thermal deformation detection system also includes a display unit 120; the display unit 120 is communicatively connected to the thermal deformation detection unit.
[0068] Display unit 120 is used to display three-dimensional deviation chromatograms and thermal deformation detection results.
[0069] In the exemplary embodiment, the display unit 120 receives the three-dimensional deviation chromatogram and the corresponding thermal deformation detection results output by the thermal deformation detection unit, and displays them visually through a graphical interface, color rendering, feature annotation and data overlay.
[0070] For example, the display unit 120 can be a high-definition display screen, an industrial control display terminal, or a terminal device with display function such as a computer or tablet.
[0071] As a feasible implementation method, the display unit 120 is specifically used to mark key deformation features in the three-dimensional deviation chromatogram to display the thermal deformation detection results; wherein, the key deformation features include: the maximum deformation key point, the minimum deformation key point, and at least one of the deformation key point regions.
[0072] Among them, the maximum deformation key point can reflect the location where the appearance component is most significantly deformed and at the highest risk under temperature load. It is the key basis for judging whether the component has deformation deviation, assembly interference and appearance defects.
[0073] The minimum deformation key point can reflect the area where the structure of the appearance component is relatively stable and the deformation is minimal in a temperature environment. It can be used to characterize the stability of the rigid area or positioning reference area of the component.
[0074] The deformation key point area can reflect the area where the thermal deformation distribution on the surface of the appearance component is dense and the deformation trend is consistent, which can intuitively reflect the overall deformation law and weak parts of the component.
[0075] In an exemplary embodiment, the display unit 120 can highlight key deformation features on a three-dimensional deviation chromatogram using different colors, marking symbols, or text annotations, making it easier for inspectors to quickly identify and evaluate them.
[0076] It should be understood that by marking key deformation features in a three-dimensional deviation chromatogram, the results of thermal deformation can be displayed intuitively and in a focused manner, effectively improving the readability and judgment efficiency of thermal deformation detection.
[0077] As another feasible implementation, the display unit 120 is specifically used to display the deformation anomaly key point area and the deformation of key points in the deformation anomaly key point area, so as to display the thermal deformation detection results.
[0078] Among them, the deformation anomaly key point area can reflect the area where the surface deformation of the appearance parts exceeds the preset threshold and does not meet the design requirements, and is used to quickly locate the unqualified area and defect location.
[0079] The deformation of key points in the abnormal deformation critical point region can reflect the specific degree of deformation and the amount of deviation within the abnormal region, providing quantitative data support for the structural improvement, process optimization and quality judgment of parts.
[0080] In an exemplary embodiment, the display unit 120 can highlight, color, or select areas with abnormal deformation, and simultaneously display the deformation values, excess ratios, and location information of the corresponding key points.
[0081] It should be understood that by displaying the abnormal deformation areas and their corresponding deformation amounts, it is possible to accurately locate and quantitatively analyze the areas of unqualified thermal deformation, thereby further improving the automation level and accuracy of thermal deformation detection.
[0082] In some embodiments, such as Figure 3 As shown, the vehicle thermal deformation detection system also includes at least one of the following: temperature detection device 130, temperature control device 140, isolation device 150, and gas conversion device 160.
[0083] The temperature detection device 130 is communicatively connected to the display unit 120; the temperature control device 140 is communicatively connected to the temperature detection device 130. The temperature control device 140, the temperature detection device 130, the gas conversion device 160, and the external components can all be placed inside the cavity of the isolation device 150, while the blue light scanning device 110 and the display unit 120 can be placed outside the isolation device 150.
[0084] It should be understood that placing the blue light scanning device 110 outside the isolation device 150 allows for the non-contact acquisition of complete three-dimensional blue light images of exterior components. This enables precise quantification and visualization analysis of thermal deformation of any complex curved surface, edge, buckle, and other features, overcoming the limitations of traditional methods that can only measure specific points or simple dimensions. Furthermore, as an optical measurement method, blue light scanning's core components are located in a constant-temperature environment or are not directly affected by the temperature field, ensuring that the scanning results are unaffected by temperature changes. This fundamentally avoids the "false deformation" or "misjudgment" problems caused by the thermal expansion and contraction of traditional metal inspection tools, ensuring the authenticity and reliability of the test results.
[0085] As a feasible implementation method, the isolation device 150 is used to isolate the exterior components from contact with the external environment.
[0086] In an exemplary embodiment, the isolation device 150 may employ a double-layer transparent high-temperature resistant glass structure, housing the temperature control device 140, temperature detection device 130, gas conversion device 160, and exterior components within the double-layer transparent high-temperature resistant glass. The double-layer transparent high-temperature resistant glass consists of two layers of high-temperature resistant transparent glass covers, with a vacuum interlayer between the two layers having a vacuum level below 10 Pa. The purpose of setting the vacuum interlayer is to reduce heat conduction between the inside and outside, maintaining a stable internal temperature. Using transparent high-temperature resistant glass effectively reduces obstruction and light refraction on the blue light scanning path, reduces interference with blue light signals reflected from the exterior components, and ensures the accuracy and integrity of the three-dimensional blue light image acquired by the scanning unit.
[0087] As a feasible implementation method, the gas conversion device 160 is used to inject inert gas into the cavity formed by the isolation device 150 and the exterior components to suppress light interference and water vapor interference during blue light scanning.
[0088] The inert gas is preferably nitrogen or helium.
[0089] Optical interference is used to characterize the interference caused by external stray light, gas scattering, optical path attenuation, and other factors on the propagation and reception of blue light signals, so as to avoid affecting the accuracy and reliability of blue light images.
[0090] Water vapor interference is used to characterize the phenomenon that water vapor in the inner cavity of the isolation device condenses, atomizes, or forms a water film under high and low temperature changes, which blocks, refracts, and scatters the blue light scanning optical path, thus leading to distortion of scanning data and increased noise.
[0091] In an exemplary embodiment, the gas conversion device 160 may employ an inert gas replacement device, which includes an inert gas storage tank and a gas replacement module, for replacing the air in the cavity of the isolation device 150 with high-purity inert gas, thereby reducing the water vapor and oxygen content inside the isolation device 150.
[0092] Reducing the water vapor content can prevent water mist or water film from forming on the glass surface inside the isolation device 150 due to temperature changes, thereby preventing the shading, refraction or scattering of the emitted and reflected light of the blue light scanning device 110; reducing the oxygen content can reduce the risk of oxidation and aging of external parts and tooling materials under high temperature environment, improve the stability of the internal environment, and ensure the safety and reliability of the high and low temperature test process.
[0093] It should be understood that by filling the sealed cavity with inert gas and completing gas replacement, water vapor condensation and optical interference can be effectively eliminated, while improving the safety and stability of the test environment. This provides a stable, clean, and low-interference testing environment for blue light 3D scanning, further ensuring the accuracy and repeatability of thermal deformation test results.
[0094] As a feasible implementation method, the temperature detection device 130 is used to detect the component temperature of the exterior parts and send it to the display unit 120.
[0095] In the exemplary embodiment, the component temperature is the actual temperature at which the appearance component reaches thermal stability under the target temperature environment, and it is a key parameter for performing thermal deformation analysis and comparing the correlation between temperature and deformation.
[0096] For example, the temperature detection device 130 may include a temperature sensor and a digital display module, which can detect the ambient temperature of the inner cavity of the isolation device 150 and the surface temperature of the components in real time, so as to achieve accurate acquisition and stable reading of the temperature of the external components.
[0097] As a feasible implementation method, the display unit 120 is also used to bind the component temperature with a three-dimensional deviation chromatogram for display, so as to facilitate the optimization of the appearance components.
[0098] In the exemplary embodiment, the display unit 120 can simultaneously label the component temperature at the corresponding acquisition time while displaying the three-dimensional deviation chromatogram, forming a one-to-one visual data of "temperature-deformation", which facilitates the analysis of the thermal deformation law of the appearance parts under different temperature conditions and provides a basis for the structural optimization, material selection and process improvement of the parts.
[0099] As a feasible implementation method, the temperature control device 140 is used to heat or cool the exterior parts and to send temperature detection commands for the exterior parts to the temperature detection device 130.
[0100] In the exemplary embodiment, the ambient temperature inside the isolation device 150 is adjusted by the heating or cooling module according to the preset target temperature, so that the exterior parts gradually reach the set test temperature, and the temperature detection device 130 is triggered to collect the component temperature in real time.
[0101] As a feasible implementation method, the temperature control device 140 is also used to stop heating or cooling when the component temperature returned by the temperature detection device 130 meets the preset conditions.
[0102] The preset conditions include: the component temperature reaches the target temperature; or, the duration for which the component temperature reaches the target temperature is greater than or equal to the preset duration.
[0103] In the exemplary embodiment, the temperature control device 140 receives the component temperature returned by the temperature detection device 130 in real time and compares it with the target temperature. When the detected temperature reaches the target temperature and remains stable for a preset time, it is determined that the appearance component has reached a thermal equilibrium state, and then the heating or cooling output is turned off to ensure that the thermal deformation detection is carried out under stable and uniform temperature conditions.
[0104] In an exemplary embodiment, the temperature control device includes a gas-circulating heating machine, a gas-circulating cooling machine, and a gas-circulating fan.
[0105] The gas circulation heater consists of a heating module and a gas circulation fan. It is used to raise the gas temperature in the 150mm cavity of the isolation device. At the same time, the fan forces gas convection, so that the temperature in the cavity quickly becomes uniform.
[0106] The gas circulation chiller consists of a refrigeration module and a gas circulation fan. It is used to reduce the gas temperature inside the isolation device 150 and promote gas circulation through the fan to ensure a uniform temperature distribution inside the cavity.
[0107] The gas circulation fan ensures a uniform and stable temperature field throughout the test space through forced convection heat transfer, eliminating local temperature differences and ensuring that all parts of the exterior components are heated and cooled evenly, thus avoiding distortion of thermal deformation test results due to uneven temperature.
[0108] It should be understood that the vehicle thermal deformation detection system in this application highly integrates vacuum insulation technology, gas circulation temperature control technology, and inert gas protection technology to form a stable and reliable testing environment: the vacuum insulation layer can effectively block the transfer of heat between the inside and outside, reduce the interference of the external environment on the internal temperature field, and ensure the long-term stability of the internal cavity temperature; the gas circulation fan realizes forced convection throughout the entire area, greatly improving temperature uniformity and ensuring that the parts are heated / cooled in a consistent manner; the inert gas replacement fundamentally solves the problems of fogging, frosting, and optical path interference on the inner wall of the glass during the high and low temperature switching process, providing a continuously clear optical window for blue light scanning, while suppressing high-temperature oxidation, ensuring the optical clarity, environmental purity, and chemical stability of the test environment, thereby significantly improving the accuracy, reliability, and repeatability of the thermal deformation detection results.
[0109] In some embodiments, such as Figure 4 As shown, in the vehicle thermal deformation detection system, the information interaction between the various devices includes: the blue light scanning device 110 scans the exterior parts and generates a blue light image based on the reflected light from the exterior parts; the temperature control device 140 placed inside the isolation device 150 can control the component temperature of the exterior parts; and the gas conversion device 160 can inject inert gas into the isolation device 150.
[0110] In some embodiments, the vehicle thermal deformation detection method provided in this application can be applied to the thermal deformation detection unit in a vehicle thermal deformation detection system. The vehicle thermal deformation detection method may specifically include: performing thermal deformation detection on the exterior parts based on a three-dimensional blue light image and a reference blue light image corresponding to the exterior parts of the vehicle at a reference temperature.
[0111] Among them, the three-dimensional blue light image is a three-dimensional blue light image obtained and sent by the scanning unit through blue light scanning of the exterior parts; the three-dimensional blue light image is used to characterize the distance between key points in the exterior parts and the blue light scanning device.
[0112] In some embodiments, the vehicle thermal deformation detection method provided in this application can be implemented as follows: placing the exterior component to be tested into an isolation device (i.e., double-layer transparent high-temperature resistant glass) at a reference temperature, turning on the gas conversion device to replace the gas in the isolation device with a water and oxygen content of less than 0.1%. Starting the blue light scanning device to scan the exterior component from multiple angles, acquiring a reference blue light image, and saving it.
[0113] Furthermore, the temperature control and temperature detection equipment are activated to adjust the temperature of the exterior components in the isolation equipment to the target temperature (such as 50℃, 80℃, 100℃, 0℃, -20℃, or -40℃), and the temperature is maintained for a preset time (such as 4 hours). The blue light scanning equipment is then activated again to scan the exterior components from multiple angles to obtain a three-dimensional blue light image. The blue light scanning equipment aligns the reference blue light image and the three-dimensional blue light image with high precision, determines the deformation of key points in the reference blue light image and the three-dimensional blue light image, and generates a three-dimensional deviation chromatogram to detect the thermal deformation of the exterior components.
[0114] In some embodiments, this embodiment also proposes a vehicle in which a vehicle thermal deformation detection system is used to detect the thermal deformation of exterior components.
[0115] like Figure 5 As shown, the electronic device 500 includes, but is not limited to, a processor 501 and a memory 502.
[0116] The aforementioned memory 502 is used to store the executable instructions of the aforementioned processor 501. It is understood that the aforementioned processor 501 is configured to execute instructions to implement the vehicle thermal deformation detection method in the above embodiments.
[0117] It should be noted that those skilled in the art will understand that Figure 5 The electronic device structure shown does not constitute a limitation on electronic device 500, which may include more than Figure 5 This may indicate more or fewer components, or combinations of certain components, or different component arrangements.
[0118] Processor 501 is the control center of electronic device 500. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in memory 502, and by calling data stored in memory 502, it performs various functions and processes data of electronic device 500, thereby providing overall monitoring of electronic device 500. Processor 501 may include one or more processing units. Optionally, processor 501 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into processor 501.
[0119] The memory 502 can be used to store software programs and various data. The memory 502 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, application programs required by at least one functional module (such as a determination unit, processing unit, etc.), etc. Furthermore, the memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.
[0120] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 502 including instructions, which can be executed by a processor 501 of an electronic device 500 to implement the vehicle thermal deformation detection method in the above embodiments.
[0121] Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium, such as a read-only memory (ROM), random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device.
[0122] In an exemplary embodiment, this application also provides a computer program product including one or more instructions, which can be executed by the processor 501 of the electronic device 500 to complete the vehicle thermal deformation detection method in the above embodiment.
[0123] It should be noted that when one or more instructions in the computer-readable storage medium or computer program product are executed by the processor of an electronic device, they implement the various processes of the above method embodiments and achieve the same technical effect as the above method. To avoid repetition, they will not be described again here.
[0124] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.
[0125] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another apparatus, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.
[0126] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the classified units can be selected to achieve the purpose of this embodiment, depending on actual needs.
[0127] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.
[0128] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, essentially, or the part that contributes to the prior art, or a complete or partial classification of the technical solution, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.
[0129] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.
Claims
1. A vehicle thermal deformation detection system, characterized in that, The vehicle thermal deformation detection system includes: a blue light scanning device; the blue light scanning device includes: a scanning unit and a thermal deformation detection unit; wherein, the scanning unit and the thermal deformation detection unit are communicatively connected. The scanning unit is used to scan the exterior components of the vehicle to obtain a three-dimensional blue light image, which is then sent to the thermal deformation detection unit. The three-dimensional blue light image is used to characterize the distance between key points in the exterior components and the blue light scanning device. The thermal deformation detection unit is used to perform thermal deformation detection on the exterior components based on the three-dimensional blue light image and the reference blue light image corresponding to the exterior components at the reference temperature.
2. The vehicle thermal deformation detection system according to claim 1, characterized in that, The thermal deformation detection unit is specifically used for: Based on the three-dimensional blue light image and the reference blue light image, the deformation of the key points is determined; Based on the deformation, a three-dimensional deviation chromatogram of the appearance component is constructed; in the three-dimensional deviation chromatogram, one color encodes one deformation. Based on the three-dimensional deviation chromatogram, thermal deformation detection is performed on the exterior components.
3. The vehicle thermal deformation detection system according to claim 2, characterized in that, The thermal deformation detection unit is specifically used for: The three-dimensional blue light image and the reference blue light image are placed in the same spatial coordinate system; Determine the first position of the key points in the three-dimensional blue light image in the spatial coordinate system; Determine the second position in the spatial coordinate system of the matching point in the reference blue light image that is closest to the key point in the three-dimensional blue light image; The straight-line distance between the first position and the second position is used as the deformation of the key point.
4. The vehicle thermal deformation detection system according to claim 2, characterized in that, The vehicle thermal deformation detection system further includes: a display unit; the display unit is communicatively connected to the thermal deformation detection unit; The display unit is used to display the three-dimensional deviation chromatogram and the thermal deformation detection results.
5. The vehicle thermal deformation detection system according to claim 4, characterized in that, The display unit is specifically used to mark key deformation features in the three-dimensional deviation chromatogram to display the thermal deformation detection results; or, the display unit is specifically used to display the key point region of deformation anomaly and the deformation of key points in the key point region of deformation anomaly to display the thermal deformation detection results. The key deformation features include at least one of the following: the maximum deformation key point, the minimum deformation key point, and the deformation key point region.
6. The vehicle thermal deformation detection system according to any one of claims 4-5, characterized in that, The vehicle thermal deformation detection system further includes: a temperature detection device; the temperature detection device is communicatively connected to the display unit; The temperature detection device is used to detect the component temperature of the exterior parts and send it to the display unit; The display unit is also used to bind the component temperature with the three-dimensional deviation chromatogram for display, so as to facilitate the optimization of the appearance components.
7. The vehicle thermal deformation detection system according to claim 6, characterized in that, The vehicle thermal deformation detection system further includes: a temperature control device; the temperature control device is communicatively connected to the temperature detection device. The temperature control device is used to heat or cool the exterior parts, and to send temperature detection commands for the exterior parts to the temperature detection device. The temperature control device is also used to stop heating or cooling when the component temperature returned by the temperature detection device meets the preset conditions. The preset conditions include: the component temperature reaches the target temperature; or, the duration for which the component temperature reaches the target temperature is greater than or equal to a preset duration.
8. The vehicle thermal deformation detection system according to any one of claims 1-5, characterized in that, The vehicle thermal deformation detection system also includes: an isolation device and a gas conversion device; The isolation device is used to isolate the exterior components from contact with the external environment; The gas conversion device is used to inject inert gas into the cavity formed by the isolation device and the exterior components to suppress light interference and water vapor interference during blue light scanning.
9. A method for detecting vehicle thermal deformation, applied to a thermal deformation detection unit in a vehicle thermal deformation detection system as described in any one of claims 1-8, characterized in that, The vehicle thermal deformation detection method includes: Thermal deformation detection is performed on the exterior components based on a three-dimensional blue light image and a reference blue light image corresponding to the vehicle's exterior components at a reference temperature; wherein, the three-dimensional blue light image is a three-dimensional blue light image obtained and transmitted by the scanning unit by scanning the exterior components with blue light; the three-dimensional blue light image is used to characterize the distance between key points in the exterior components and the blue light scanning device.
10. A vehicle, characterized in that, The vehicle employs the vehicle thermal deformation detection system as described in any one of claims 1-8 to perform thermal deformation detection on its exterior components.