Product detection method and system for flexible dual-mode dimming film of sports glasses

Abstract

The invention relates to a dimming film detection technology, and discloses a sports glasses flexible dual-mode dimming film product detection method and system, and the method comprises the steps: carrying out the suspension tiling of a dimming film, carrying out the edge clamping and stretching shaping, giving an axial tension to the dimming film in the stretching process, and adjusting the relaxation degree of the dimming film after clamping and positioning; a dynamic pressure applying pneumatic nozzle is moved to the position below a to-be-tested node of the dimming film, and dynamic controllable bending stress is applied to the dimming film through gas kinetic energy; and when the dynamic controllable bending stress is applied, a controllable electric signal is applied to the dimming thin film, and under the switching adjustment of the electric signal, the optical state of the dimming thin film is changed. Different from traditional static detection, a set of detection scheme that the sports glasses and the dimming thin film thereof simulate real working conditions is constructed, multi-dimensional detection of the dimming thin film can be completed more comprehensively, and quality detection of the dimming thin film after production and forming is automatically achieved.

Description

Technical Field

[0001] This invention relates to the field of testing technology for dimming films in sports glasses, specifically to a product testing method and system for flexible dual-mode dimming films in sports glasses. Background Technology

[0002] To improve the stability of optical characteristics and the versatility of applications in sports eyewear, such as adaptive light transmission adjustment to automatically adapt to rapidly changing lighting environments like tunnels, shaded areas, and direct sunlight, sports eyewear often incorporates a dimming film to adjust light transmission. During the production of this dimming film, continuous sampling and testing are necessary to ensure its stable and effective performance, enabling long-term use in sports eyewear.

[0003] Existing testing processes for dimming films typically involve statically positioning the film to ensure its stability on a testing stage. The film is then subjected to performance testing in a static, flat state, focusing on its dimming response speed and optical uniformity to assess performance degradation. While this method provides a stable assessment of the film's performance, it has limitations. For instance, sports glasses possess inherent toughness, deformation, and recovery characteristics due to their inherent properties and usage. During use, they are frequently subjected to impacts from wearing, storage, and drops, causing deformation of both the glasses and the dimming film, thus affecting its optical performance. Therefore, conventional static testing of dimming films cannot accurately detect usage defects or assess the stability of their optical properties.

[0004] To address the aforementioned issues, it is imperative to innovate the existing detection methods for dimming films in sports glasses. Summary of the Invention

[0005] The purpose of this invention is to provide a product testing method and system for flexible dual-mode dimming films for sports glasses, in order to solve the problem mentioned above. The existing dimming film testing method for sports glasses tests the dimming film in a static, flat state, which has significant defects and cannot effectively detect the adverse effects on optical performance caused by bending deformation of the dimming film.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a product testing method for a flexible dual-mode dimming film for sports glasses, comprising the following steps: S1: The dimming film is suspended and laid flat, and its edges are clamped and stretched for shaping. During the stretching process, an axial tension is applied to the dimming film to adjust the slack of the dimming film after clamping and positioning. S2: Move the dynamic pressure pneumatic nozzle to the node to be tested on the dimming film and apply dynamic and controllable bending stress to the dimming film using the kinetic energy of the gas. S3: While applying dynamic and controllable bending stress, a controllable electrical signal is applied to the dimming film. Under the adjustment of the electrical signal switching, the optical state of the dimming film changes. S4: Synchronously acquire the bending deformation motion state and optical state changes of the dimming film in S2 and S3 to form the optical response signal and data of the dimming film; S5: Extract and save the optical response signal and data, and further extract the dimming performance coupling parameters of the dimming film in a static state. Evaluate the film quality by comparing the parameters and data.

[0007] Preferably, the clamping and positioning of the dimming film in S1 utilizes a servo motor and a flexible clamp to achieve the positioning of the dimming film, and the relaxation is adjusted to facilitate the local deformation treatment of the dimming film. The number and distribution of the servo motor and the flexible clamp depend on the overall area size of the dimming film being detected.

[0008] Preferably, in step S2, a dynamically controllable bending stress is applied to the dimming film, the curvature of which is programmable and controllable. This stress, together with the relaxation adjustment of the dimming film, simulates the changes in wearing status in different scenarios under the bending shape of the dimming film.

[0009] Preferably, the controllable electrical signal input in S3 uses a transparent conductive material coated on the upper and lower surfaces of the dimming film as a transparent conductive layer, which is connected to a dual-mode driving power supply through a flexible electrode structure to control the voltage signal and switch the transparent conductive layer of the dimming film between transparent and dark states.

[0010] Preferably, the optical response signal and data acquisition in S4 uses a hyperspectral imager to change the optical state of the dimming film to achieve a stable dark state and a stable transparent state, scan the transmittance and reflectance spectrum of the dimming film in the visible light band, and evaluate the optical uniformity of the dimming film.

[0011] Preferably, in step S4, the optical response signal and data acquisition also involves using a high-speed camera to capture the brightness change process of the dimming film surface at a specific wavelength and measuring the response time.

[0012] Preferably, the dimming performance coupling parameters of the dimming film in S5 include the local response delay area and the spectral shift vector, wherein the preset values ​​of the coupling parameters are obtained by detecting the dimming film in a static state.

[0013] Preferably, the local response delay area identifies the size and location of the area where the dimming film's response speed is slower than normal due to bending stress; it captures the response delay and determines the local impact of bending stress on the film switching speed.

[0014] Preferably, the spectral shift vector determines the effect of the bending of the dimming film on the changes in the light transmittance and color characteristics of the dimming film, and performs a comparative analysis of the dynamic and static parameters of the dimming film.

[0015] The present invention further provides a product inspection system for a flexible dual-mode dimming film for sports glasses, the system comprising the following modules: The power loading module uses a servo motor and a film positioning fixture to complete the edge clamping and positioning of the dimming film, as well as the adjustment of the positioning stretch of the dimming film under axial tension, and applies the deformation pressure of the dimming film through a dynamic pressure pneumatic nozzle under the film. The dual-mode excitation module includes a programmable dynamic pressure pneumatic nozzle, a dual-mode drive power supply, and a synchronization control module. When the dynamic pressure pneumatic nozzle applies deformation pressure to the dimming film, the dual-mode drive power supply outputs a voltage signal, which is connected to the dimming film to enable the dimming film to synchronously change between dark and transparent states. The synchronization control module ensures that the deformation and bending action of the dimming film is synchronized with the voltage signal switching. The optical acquisition module includes a high-speed camera, a hyperspectral imager, and a synchronization trigger module. The high-speed camera acquires the changes in surface brightness and curvature during the deformation of the dimming film, while the hyperspectral imager analyzes the wavelength information of reflected and transmitted light from the pixels during the deformation of the dimming film. The synchronization trigger module is used to align the high-speed camera and the hyperspectral imager with the deformation and optical state of the dimming film at the moment of shooting. The parameter comparison module extracts time-dimensional, spatial-dimensional, and spectral-dimensional parameters, and compares the dynamic response parameters of the dimming film deformation and optical state switching with the static reference parameters of the dimming film to determine the influence of bending stress during dimming film deformation on the optical state switching speed of the film.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the product testing method and system for the flexible dual-mode dimming film of sports glasses, which is different from the traditional static testing, can construct a testing scheme for sports glasses and their dimming film that simulates real working conditions, can more comprehensively complete the multi-dimensional testing of dimming film, and automatically realize the quality testing of dimming film after production and molding, thereby improving the molding and output quality of dimming film. 1. Highly simulates the complex dynamic mechanical environment experienced by sports glasses during actual wear. Through the power loading module, the system can simultaneously apply precise and controllable axial tensile force to the dimming film and local dynamic bending stress applied through the pneumatic nozzle, thereby reproducing the real composite force scenario, simulating the tension and impact state of the frame of sports glasses during use, and simulating the squeezing, collision or wind pressure of sports glasses during long-term use, thereby improving the accuracy of the data obtained by the dimming film in product testing; 2. The synchronous control unit ensures that the optical state switching and mechanical deformation process of the thin film are synchronized at the millisecond level. This synchronous control enables the observation results to directly and accurately establish the causal relationship between bending stress and optical performance changes, avoiding data distortion caused by timing deviations and greatly improving the accuracy and reliability of the detection. 3. Simultaneously, a multi-dimensional optical performance capture system for optical thin films is implemented to accurately and effectively identify hidden defects. This includes a quantified response delay feature, which uses a high-speed camera to capture millisecond-level transient changes in film surface brightness. This allows for precise identification of localized response delay regions caused by bending stress, quantifying their delay area and time. This directly reflects the local impact of stress on the film's switching speed, defects that are difficult to detect in static inspections. Furthermore, uniform attenuation is assessed. By comprehensively analyzing high-speed and hyperspectral data, the uniform attenuation coefficient of the film's optical performance under dynamic bending conditions can be calculated. This effectively detects stress-induced unevenness in brightness, streaks, or light spots, comprehensively evaluating the product's consistency and reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the product testing method for the flexible dual-mode dimming film for sports glasses of the present invention; Figure 2 This is a schematic diagram of the product testing system module for the flexible dual-mode dimming film for sports glasses of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figure 1 - Figure 2 This invention provides a technical solution: a product testing method for a flexible dual-mode dimming film for sports glasses. The specific steps of this method are as follows: S1: The dimming film is suspended and laid flat, and its edges are clamped and stretched for shaping. During the stretching process, an axial tension is applied to the dimming film to adjust the slack of the dimming film after clamping and positioning. When suspending and laying the S1 dimming film, the film to be tested is first placed on the testing table with static flat deformation. It is crucial to ensure the film's flatness to avoid distortion caused by placement and positioning issues, as well as the effects of electrostatic adsorption. Therefore, the testing table needs to be destaticated. Subsequently, a servo motor and flexible clamps are used to hold the edges of the film. The flexible clamps are pneumatically driven to apply pressure and position the film. The servo motor, through a transmission mechanism, lifts and lowers the flexible clamps. To improve the ease of bending deformation during subsequent testing, these flexible clamps can move axially, allowing symmetrically distributed clamps to move closer or further apart, adjusting the film's relaxation level. This utilizes the film's inherent toughness. This design ensures greater stability and prevents damage to the dimming film during relaxation adjustment. Specifically, when the symmetrically distributed flexible clamps are spaced apart, an axial outward stretching force is applied to the dimming film. This prevents the film from sagging due to its own weight when lifted and suspended by the flexible clamps and servo motors, thus avoiding bending caused by gravity and affecting the extraction of subsequent static dimming performance parameters. Furthermore, to improve the dynamic and controllable bending stress application during use, the relative positions of the symmetrically distributed flexible clamps can be altered, bringing them closer together to achieve relaxation adjustment of the dimming film. This avoids the tensile stress damage caused by the film being under tension during bending deformation control.

[0020] In the above scheme, it should be noted that the dimming film uses a flexible clamp to achieve clamping and positioning operations, thereby adjusting the tension and relaxation of the dimming film. In the tensioned state, the dimming film is more compatible with the installation form of the dimming film in existing sports glasses, thus improving the accuracy of dimming film detection.

[0021] S2: Move the dynamic pressure pneumatic nozzle to the node to be tested on the dimming film and apply dynamic and controllable bending stress to the dimming film using the kinetic energy of the gas. In the above-mentioned application of dynamic and controllable bending stress to the S2 dimming film, it is first necessary to ensure that the dimming film is suspended and in a relaxed standby state through the action of flexible clamps and servo motors. This facilitates the synchronous use of the dynamic pressure pneumatic nozzles and avoids the dimming film from being damaged by its own pressure due to the detection action. The dynamic pressure pneumatic nozzles are arranged in groups, that is, multiple dynamic pressure pneumatic nozzles are arranged in an array. During mechanical use, all dynamic pressure pneumatic nozzles generate negative pressure positioning for the dimming film. When it is necessary to apply bending stress to a corresponding local area of ​​the dimming film, the dynamic pressure pneumatic nozzle at the corresponding installation position releases the negative pressure adsorption positioning state, and its pneumatic mode changes from negative pressure to positive pressure. The pneumatic force is used to push the dimming film to achieve the local deformation effect of the dimming film. The pneumatic pressure form and the magnitude of the pneumatic kinetic energy of the dynamic pressure pneumatic nozzles are controlled by the programming system, which improves the convenience of operation and can more accurately apply bending stress to the dimming film, realizing the control of different bending changes of the dimming film.

[0022] It is worth noting that in the above technical solution, the local positioning of the dimming film and the deformation pressure control under dynamic load are achieved through dynamic pressure pneumatic nozzles. The dynamic pressure pneumatic nozzles are installed in an array, and the array distribution directly utilizes the workpiece clamping mechanism to achieve stable positioning, preventing the dynamic pressure pneumatic nozzles from relaxing their self-limiting state, which would affect their precise and stable dynamic load output to the dimming film. In addition to using the workpiece clamping mechanism for installation limitation, the workpiece itself also needs to be positioned to ensure the stability of the dynamic pressure pneumatic nozzles. The dynamic pressure pneumatic nozzles and their associated clamping workpieces can be effectively moved in all directions within the area where the dimming film is located. They can be installed, moved, and positioned using hydraulic components or servo motors and other supporting facilities. This allows the array of dynamic pressure pneumatic nozzles to move and position in multiple directions on the horizontal plane, as well as to be positioned vertically. After the dimming film is lifted and laid flat in mid-air, the array of dynamic pressure pneumatic nozzles can move to the installation position of the dimming film. The pneumatic action is used to achieve the effect of local limiting and applying bending deformation stress to the area of ​​the dimming film to be tested.

[0023] S3: While applying dynamic and controllable bending stress, a controllable electrical signal is applied to the dimming film. Under the adjustment of the electrical signal switching, the optical state of the dimming film changes. In the aforementioned application of a controllable electrical signal to the S3 dimming film, this operation step is first performed synchronously with the application of dynamic controllable bending stress to the dimming film. This allows for simultaneous application of an electrical signal during the bending deformation of the dimming film, altering its optical state. This enables more precise detection of the impact of bending stress on the optical state of the dimming film, thus detecting how its optical performance changes when deformed by external forces in practical applications. This improves the accuracy of optical detection and better reflects the usage characteristics of dimming films in sports glasses. The purpose of applying a controllable electrical signal to the dimming film is to perform a comprehensive dynamic functional test, utilizing flexible probes or capacitive coupling. An electric field is applied in various ways, and a dedicated stable power supply, namely a dual-mode drive power supply, is installed to output a voltage signal. This converts the conventional 220V voltage into a safe, low operating voltage required for the dimming film to function, preventing damage to the dimming film caused by excessive voltage or reverse connection. Simultaneously, depending on the structural characteristics of the dimming film, the electric field drives the liquid crystal molecules to align in an orderly manner when power is applied, or triggers an oxidation-reduction reaction in the electrochromic material, achieving the technical effect of switching between a transparent and dark state. When power is off, the disappearance of the electric field causes the functional materials of the dimming film to revert to their original random state, resulting in the optical state of the dimming film changing to a transparent state. This detection method can be repeated continuously without affecting the functionality of the dimming film in subsequent normal applications.

[0024] S4: Synchronously acquire the bending deformation motion state and optical state changes of the dimming film in S2 and S3 to form the optical response signal and data of the dimming film; In the aforementioned optical response signal and data acquisition of the S4 dimming film, a high-speed camera and a hyperspectral imager are used together to collect information such as changes in surface brightness and curvature during the deformation of the dimming film, as well as the wavelengths of light reflected and transmitted by pixels during the deformation of the dimming film. The detection method is as follows: under pneumatic pressure drive, the dynamic controllable bending stress applied to the dimming film is adjusted; under the action of a controllable electrical signal, the optical state of the dimming film is changed; and data information on the changes in the bending deformation motion state and the changes in the optical state of the dimming film are collected simultaneously. The dimming film detection operation is carried out simultaneously in the above process. By collecting the changes in the optical state of the dimming film during the deformation and bending process, the functional characteristics of the dimming film itself caused by the external force are detected to determine whether it meets the effect of sports glasses under normal use.

[0025] S5: Extract and save the optical response signal and data, and further extract the dimming performance coupling parameters of the dimming film in the static state. Evaluate the film quality by comparing the parameters and data. In the aforementioned S5 dimming film detection, functional parameters of the dimming film, such as light transmittance, need to be set in advance. To compare whether the optical performance of the dimming film changes adversely due to deformation and bending, a controllable electrical signal is applied to the dimming film in a static, flat state, and its optical performance is detected using a hyperspectral imager. This allows for the quantification of the coupled changes in performance across time and space in the high-speed images and spectral data acquired during subsequent dynamic bending and power-on switching processes. This operational step can simulate the realistic working state of the dimming film on sports glasses. Testing the dimming film under realistic working conditions is essential to directly and accurately reflect its final performance. This testing also allows for the precise detection of hidden defects in the dimming film. Many defects are undetectable under static conditions. For example, while electrical testing can detect issues such as uneven microstructure distribution, electrode damage, or poor encapsulation, which can lead to localized slow response and uneven dimming, these problems are amplified under dynamic conditions, causing previously unseen issues to persist. Therefore, dynamic simulation of real-world working conditions allows for more accurate detection of these defects that only manifest under stress.

[0026] Example 2: In the specific steps of the product testing method for the flexible dual-mode dimming film of sports glasses, the product testing method for the dimming film can be implemented more accurately.

[0027] In S1, the dimming film is clamped and positioned using a servo motor and a flexible fixture to achieve the positioning of the dimming film. The relaxation is adjusted to facilitate the local deformation treatment of the dimming film. The number and distribution of the servo motor and the flexible fixture depend on the size of the overall area of ​​the dimming film being detected. In the aforementioned clamping and positioning of the dimming film, the number and distribution of servo motors and flexible fixtures can be changed according to the overall area of ​​the dimming film to be tested. This operation allows the dimming film to be suspended and laid flat, preventing twisting and deformation of the dimming film during clamping, positioning, and pulling. Wrinkles caused by twisting and deformation of the dimming film can lead to errors in optical testing, affecting the accuracy of dimming film performance testing. The flexible fixture uses pneumatic means to clamp and position the dimming film without covering the electrodes, facilitating the subsequent power-on processing of the dimming film.

[0028] In S2, a dynamic and controllable bending stress is applied to the dimming film. The curvature of the bending stress is programmable and controlled. Together with the relaxation adjustment of the dimming film, it simulates the changes in wearing status in different scenarios under the bending shape of the dimming film. The aforementioned dimming film is subjected to dynamically controllable bending stress. Using a dynamic pressure pneumatic nozzle, the bending arc, speed, and frequency of the dimming film are changed, allowing it to cyclically move between flatness and a specific curvature, simulating the torsional changes of sports glasses and the dimming film under long-term use. The dynamic pressure pneumatic nozzle, due to its multiple array-distributed installations, allows for localized positioning and complete bending deformation adjustment of the dimming film, achieving adjustment for its use. In addition to the above scheme, an adjustment clamp can be further added, replacing the flexible clamp holding the dimming film in S1 with an adjustment clamp. This adjustment clamp is directly attached to the outside of the dimming film and driven directly by a servo motor, achieving curvature adjustment of both the clamp and the dimming film, simulating changes in the curvature of the temples of sports glasses. Through the use of the adjustment clamp or the dynamic pressure pneumatic nozzle, in... At the moment the dimming film is bent by adjusting the clamp or the dynamic pressure pneumatic nozzle, a synchronous controller and a dual-mode drive power supply are used simultaneously. The dual-mode drive power supply synchronously sends a command output voltage signal, such as the required +5V for the controllable electrical signal output of the dimming film, to drive the dimming film from a dark state to a transparent state. After the dimming film reaches the transparent state, in order to improve the accuracy and stability of the dimming film product detection, the voltage is maintained until the deformation motion of the dimming film reaches the preset maximum bending degree. Then, the synchronous controller commands the dual-mode drive power supply to output a reverse voltage of -5V, or directly cuts off the voltage, so that the dimming film switches from the transparent state to the dark state. This process is repeated continuously at a high frequency. The number of repetitions depends on the dimming film layer and quality being tested, simulating the continuous stress experienced by sports glasses during long-term use, so that the dimming film is under real and continuous dynamic stress state for performance testing.

[0029] In S3, the controllable electrical signal input uses transparent conductive material deposited on the upper and lower surfaces of the dimming film as a transparent conductive layer. It is connected to the dual-mode driving power supply through a flexible electrode structure to control the voltage signal and switch the transparent conductive layer of the dimming film between transparent and dark states. In the aforementioned controllable electrical signal input, the transparent conductive layer typically uses an extremely thin layer of indium tin oxide (ITO), which is both conductive and ensures extremely high light transmittance without obstructing the view. The flexible electrode structure mentioned above can be a flexible probe. In the above-mentioned application, the arrangement of liquid crystal molecules in the interlayer is controlled by an electric field. When there is no electric field, the liquid crystal molecules inside the film are in a disordered and random arrangement. These disordered molecules will strongly scatter the incident light, making the film appear milky white and opaque (i.e., dark or foggy), thus achieving a light-blocking effect. When a voltage is applied through the transparent electrodes on both sides of the film, the electric field will drive the liquid crystal molecules to quickly align in an orderly manner along the direction of the electric field. Once the molecules are aligned, light can pass through the film smoothly, making it transparent and colorless, forming the transparent state of the dimming film.

[0030] In S4, the optical response signal and data acquisition uses a hyperspectral imager to change the optical state of the dimming film to achieve the switching between a stable dark state and a stable transparent state. The transmittance and reflectance spectra of the dimming film in the visible light band are scanned to evaluate the optical uniformity of the dimming film. In the use of the aforementioned hyperspectral imager, it can not only take pictures, but also analyze the wavelength (color) information of the light reflected or transmitted by each pixel, and discover local color distortion or uneven light transmission caused by bending stress, which are defects that ordinary cameras cannot see. Its data acquisition obtains an "image cube", simultaneously recording the spatial information of the object under test and the continuous spectral information of each pixel. The imaging spectrometer disperses the incident light and obtains a three-dimensional data block through scanning. Data analysis extracts and compares feature spectra, identifies small spectral changes caused by bending stress, extracts average spectral curves in suspected defect areas and normal areas respectively, quantifies the differences through algorithms (calculating the root mean square error of the spectrum RMSE), or uses the similarity of the shape of the spectral curves (spectral fit goodness coefficient GFC) to assist in the analysis.

[0031] In S4, optical response signal and data acquisition also involves using a high-speed camera to capture the brightness change process of the dimming film surface at a specific wavelength and measuring the response time. The aforementioned high-speed camera records the brightness change process of the entire film surface at an extremely high frame rate (1000 frames per second), capturing millisecond-level response delays that are indistinguishable to the naked eye. This allows for the determination of whether the film's "color change" is rapid and uniform, and to visually assess whether the optical state of the dimming film changes synchronously during the application of bending deformation stress. It also determines whether the bending deformation stress affects the switching of the optical state by causing a local response delay, thereby measuring the response time of the dimming film's optical state switching. This facilitates subsequent comparison of its optical response signal and data with statically obtained detection parameters to evaluate the effect of dynamic stress on the dimming film.

[0032] The dimming performance coupling parameters of the dimming film in S5 include the local response delay area and the spectral shift vector. The preset values ​​of these coupling parameters are obtained from the dimming film under static conditions. In this technical solution, the initial parameters of the film are acquired under static conditions; these parameters are the foundation for subsequent accurate dynamic performance evaluation. When obtaining the raw optical data, the local response delay area is used as a reference. The core of this parameter is time. Under static conditions, the average response time of the film in static conditions (e.g., the time required to switch from a transparent to a dark state) is obtained using elliptic polarization or spectroscopy as a standard reference value. Then, although the sample is static, the entire film surface can be scanned using high-resolution imaging technology (hyperspectral camera) to obtain the response time of each tiny pixel. Next, the difference between the response time of each pixel and the global average reference value is calculated. Under ideal static conditions, the difference between all points should be minimal. The baseline value of the "delayed area" should theoretically be close to zero, representing the ideal level of uniformity under stress-free conditions. Any delayed area significantly larger than this baseline value appearing in subsequent dynamic tests indicates a performance degradation area caused by stress. The spectral offset vector baseline, whose core parameter is color / spectral fidelity, is measured using a hyperspectral imager in the static state of the dimming film under a specific operating condition (complete darkness). This curve serves as the standard reference spectrum. Similarly, this reference spectrum can be the average value of the entire area. The "spectral offset vector" is the mathematical expression used to quantify the difference between the spectrum measured in dynamic testing and this static reference spectrum. In the static state, the baseline value of the spectral offset vector should also approach zero, indicating no deviation in color reproduction. Non-zero vectors appearing in subsequent dynamic tests characterize spectral distortion (yellowing of color or deformation of the transmittance curve) caused by bending or other reasons.

[0033] In the above scheme, in order to establish a reliable parameter database and transform the parameters obtained in the above steps into valuable benchmark parameters, systematic work is still required, such as: Multiple measurements and statistics: To ensure the reliability of the baseline, it is necessary to repeatedly measure multiple samples from the same batch or different locations of the same sample, then take the average value and calculate the standard deviation; this helps to determine a reasonable baseline range (mean ± 3 times the standard deviation), rather than a single theoretical value, thus accommodating the intrinsic small fluctuations of the material; Establish a parameter database: Ultimately, the baseline parameters (local response delay area, spectral shift vector, along with thickness, refractive index, etc.) of each model / batch of dimming film in a static state should be stored in the database; this database will serve as the "benchmark" for judging whether products are qualified in future online testing.

[0034] In terms of local response delay area, it identifies the size and location of areas where the dimming film's response speed is slower than normal due to bending stress; it captures the response delay to determine the local impact of bending stress on the film's switching speed; in extracting time-dimensional parameters and capturing the response delay, in addition to establishing a baseline for the response delay, it is also necessary to perform dynamic comparison of the dimming film during detection. While the dimming film undergoes bending morphological movement and changes in optical state, it extracts the brightness change curve of each pixel (micro-region) on the film surface over time from video sequences captured by a high-speed camera. This includes the transition from a dark state to a transparent state (response time) and from... The complete process of returning from the transparent state to the dark state (relaxation time) is described. Then, the data acquired under dynamic bending conditions is processed. For the same pixel, its response time under dynamic conditions is calculated. The dynamic response time is compared with the static reference time to form a time difference (ΔT), which is the response delay of that point. A reasonable delay threshold is set (the preset threshold in this scheme is 2 standard deviations beyond the static reference time), and all pixels with delays exceeding the threshold are marked. The total area of ​​the region formed by these points is the local response delay area. This parameter directly reflects the local influence of bending stress on the thin film switching speed.

[0035] The spectral shift vector is used to determine the impact of bending on the light transmission and color characteristics of the dimming film. A comparative analysis of dynamic and static parameters of the dimming film is performed. Based on the extracted spectral parameters, color distortion is detected. This detection method aims to determine whether bending alters the inherent optical properties of the film. In addition to establishing a baseline for the spectral shift vector, while the dimming film undergoes bending motion and changes in its optical state, a hyperspectral imager or spectrophotometer is used to acquire complete transmission or reflection spectral curves of the film in a stable dark and transparent state under dynamic bending conditions. Then, the spectral curve under dynamic bending conditions is precisely compared with the reference spectral curve under static baseline conditions. Two key changes are considered: first, the characteristic peak / valley shift of the spectral curve: if absorption or transmission peaks exist in the spectrum, the shift of their peak wavelength under dynamic conditions (Δλ); and second, overall spectral deformation: the correlation coefficient or root mean square error (RMSE) between the two spectral curves is calculated as a quantitative representation of the "spectral shift vector." This shift may indicate that bending stress has altered the microstructure of the film material or the arrangement of liquid crystal molecules, leading to color distortion.

[0036] In addition to the aforementioned dimming performance coupling parameters of the dimming film, including the local response delay area and spectral shift vector, this invention can further extract spatial dimension parameters, namely, to evaluate the uniformity attenuation effect of the optical film. The goal of this step is to quantify how bending affects the consistency and uniformity of film dimming. A constant parameter benchmark can be obtained using data collected by a hyperspectral imager when the film reaches a stable dark state and a stable transparent state, to obtain the brightness or specific wavelength transmittance distribution map of the entire film surface. Then, its uniformity is calculated; under static flat conditions, the brightness or transmittance of the entire film surface is calculated. The standard deviation of the rate (σstatic) is calculated; the smaller the standard deviation, the better the uniformity. To calculate dynamic uniformity, at a specific moment of dynamic bending (such as when bending to the maximum curvature), the standard deviation of the brightness or transmittance of the film surface (σdynamic) is also calculated. When quantifying the attenuation effect, a uniformity attenuation coefficient (η) is set, which can be calculated by the formula η=σ(dynamic) / σ(static). The larger the coefficient is than 1, the more severe the optical non-uniformity caused by dynamic bending. It comprehensively reflects the defects such as light spots, stripes or uneven brightness that bending may cause, thereby improving the detection efficiency and accuracy of the dimming film in a variety of ways.

[0037] Example 3: The present invention further discloses a product testing system for a flexible dual-mode dimming film for sports glasses, wherein the specific system module types are as follows: The power loading module uses a servo motor and a film positioning fixture to complete the edge clamping and positioning of the dimming film, as well as the adjustment of the positioning stretch of the dimming film under axial tension, and applies the deformation pressure of the dimming film through a dynamic pressure pneumatic nozzle under the film. The use of the dynamic loading module simulates complex mechanical scenarios in real-world use, including tension and bending, providing repeatable and precisely controllable stress conditions for testing. It precisely simulates the actual stress and bending effects on the optical film. This module is the foundation of the entire testing system, and its core task is to accurately simulate the complex mechanical environment that sports glasses may experience during actual wear and use. Precise positioning and tension control: Through servo motors and film positioning fixtures, the system can achieve precise edge clamping and positioning of the dimming film sample and precise adjustment of axial tension. This ensures high consistency and repeatability of initial conditions and tensile strain in each test, providing a reliable foundation for subsequent data analysis. Furthermore, dynamic deformation pressure application can apply controllable and programmable local pressure to the film surface, simulating the bending deformation of the lens under accidental compression or dynamic wind pressure. This composite loading method, through tension and bending, more realistically reflects the complex stress state faced by the film in actual use.

[0038] The dual-mode excitation module includes a programmable dynamic pressure pneumatic nozzle, a dual-mode drive power supply, and a synchronization control module. When the dynamic pressure pneumatic nozzle applies deformation pressure to the dimming film, the dual-mode drive power supply outputs a voltage signal, which is connected to the dimming film to enable the dimming film to synchronously change between dark and transparent states. The synchronization control module ensures that the deformation and bending action of the dimming film is synchronized with the voltage signal switching. The dual-mode excitation module is used to excite and test the core functions of the thin film. It utilizes the synchronous operation of electrical signal application and power output to ensure precise synchronization between optical changes and mechanical deformation. The dual-mode drive and rapid switching are accomplished as follows: the dual-mode drive power supply applies electrical signals of specific waveforms and voltages to the dimming film, driving it to rapidly switch between a highly transparent state and a dark, opaque state. This dual-mode characteristic means that the performance of the thin film can be tested under different voltage modes. The synchronization control module is the core component of this module. It ensures that the action of the dynamic pressure-applying pneumatic nozzle in applying deformation pressure is synchronized with the timing of the voltage signal output by the dual-mode drive power supply. This synchronization of electrical signal control and force load application is a prerequisite for accurately capturing the influence of bending stress on optical performance and avoids data distortion caused by timing deviations.

[0039] The optical acquisition module includes a high-speed camera, a hyperspectral imager, and a synchronization trigger module. The high-speed camera acquires the changes in surface brightness and curvature during the deformation of the dimming film, while the hyperspectral imager analyzes the wavelength information of reflected and transmitted light from the pixels during the deformation of the dimming film. The synchronization trigger module is used to align the high-speed camera and the hyperspectral imager with the deformation and optical state of the dimming film at the moment of shooting. In the aforementioned optical acquisition module, multi-dimensional optical response capture is completed. It is responsible for capturing and recording the optical performance of the thin film under dynamic stress from different dimensions. The high-speed camera records the transient changes in surface brightness and curvature of the dimming thin film during deformation at an extremely high frame rate. This is directly used to analyze the response delay and overall uniformity of the thin film in local areas and to identify areas where the response speed is slowed down due to bending stress. The hyperspectral imager has a function far exceeding that of an ordinary camera. It can acquire complete reflection or transmission spectral information of each pixel. This can be used to discover microscopic defects such as local color distortion or uneven transmittance caused by bending stress that are difficult for the human eye to detect, and can perform spectral characteristic analysis. The synchronous triggering module is the key to ensuring the validity of the data. It ensures that the moment of shooting by the high-speed camera and the hyperspectral imager is precisely aligned with the deformation position and electronic control switch state of the thin film, so that subsequent analysis can establish accurate causal relationships.

[0040] The parameter comparison module extracts time, space, and spectral parameters, and compares the dynamic response parameters of the dimming film's deformation and optical state switching with the static reference parameters of the dimming film to determine the impact of bending stress during deformation on the film's optical state switching speed. This intelligent decision-making process from data to judgment allows for a more intuitive presentation of data to inspectors. The module extracts three key parameters from the optical acquisition data: time dimension parameters (local response delay area, quantifying the region where the response is slowed due to bending); space dimension parameters (uniformity attenuation coefficient, assessing the impact of bending on the overall light transmittance consistency of the film); and spectral dimension parameters (spectral shift vector, characterizing whether bending causes changes in the film's color or light transmittance characteristics). It then performs a dynamic and static comparison of the optical film, comparing these parameters measured under dynamic bending conditions with reference parameters established when the film is in a static, flat state. This comparison accurately quantifies the impact of bending stress on the film's optical state switching speed, consistency, and fidelity, ultimately forming an objective judgment of the film's quality.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A product testing method for a flexible dual-mode dimming film for sports glasses, characterized in that, Includes the following steps: S1: The dimming film is suspended and laid flat, and its edges are clamped and stretched for shaping. During the stretching process, an axial tension is applied to the dimming film to adjust the slack of the dimming film after clamping and positioning. S2: Move the dynamic pressure pneumatic nozzle to the node to be tested on the dimming film and apply dynamic and controllable bending stress to the dimming film using the kinetic energy of the gas. S3: While applying dynamic and controllable bending stress, a controllable electrical signal is applied to the dimming film. Under the adjustment of the electrical signal switching, the optical state of the dimming film changes. S4: Synchronously acquire the bending deformation motion state and optical state changes of the dimming film in S2 and S3 to form the optical response signal and data of the dimming film; S5: Extract and save the optical response signal and data, and further extract the dimming performance coupling parameters of the dimming film in a static state. Evaluate the film quality by comparing the parameters and data.

2. The product testing method for the flexible dual-mode dimming film for sports glasses according to claim 1, characterized in that: The dimming film clamping and positioning in S1 utilizes a servo motor and a flexible fixture to achieve the positioning of the dimming film. The relaxation is adjusted to facilitate the local deformation treatment of the dimming film. The number and distribution of the servo motor and the flexible fixture depend on the overall area size of the dimming film being detected.

3. The product testing method for the flexible dual-mode dimming film for sports glasses according to claim 1 or 2, characterized in that: In S2, a dynamic and controllable bending stress is applied to the dimming film. The curvature of the bending stress is programmable and controlled. Together with the relaxation adjustment of the dimming film, it simulates the changes in wearing status in different scenarios under the bending shape of the dimming film.

4. The product testing method for the flexible dual-mode dimming film for sports glasses according to claim 1, characterized in that: The controllable electrical signal input in S3 uses transparent conductive material deposited on the upper and lower surfaces of the dimming film as a transparent conductive layer. It is connected to the dual-mode driving power supply through a flexible electrode structure to control the voltage signal and switch the transparent conductive layer of the dimming film between transparent and dark states.

5. The product testing method for the flexible dual-mode dimming film for sports glasses according to claim 1, characterized in that: The optical response signal and data acquisition in S4 uses a hyperspectral imager to change the optical state of the dimming film, achieving a switch between a stable dark state and a stable transparent state. It scans the transmittance and reflectance spectrum of the dimming film in the visible light range to evaluate the optical uniformity of the dimming film.

6. The product testing method for the flexible dual-mode dimming film for sports glasses according to claim 1 or 5, characterized in that: In S4, the optical response signal and data acquisition also involves using a high-speed camera to capture the brightness change process of the dimming film surface at a specific wavelength and measuring the response time.

7. The product testing method for the flexible dual-mode dimming film for sports glasses according to claim 1, characterized in that: The dimming performance coupling parameters of the dimming film in S5 include the local response delay area and the spectral shift vector. The preset values ​​of the coupling parameters are obtained by detecting the dimming film under static conditions.

8. The product testing method for the flexible dual-mode dimming film for sports glasses according to claim 7, characterized in that: The local response delay area identifies the size and location of the area where the dimming film's response speed is slower than normal due to bending stress; it captures the response delay to determine the local impact of bending stress on the film's switching speed.

9. The product testing method for the flexible dual-mode dimming film for sports glasses according to claim 7, characterized in that: The spectral shift vector is used to determine the effect of the bending of the dimming film on the changes in the light transmission and color characteristics of the dimming film, and to compare and analyze the dynamic and static parameters of the dimming film.

10. A product inspection system for a flexible dual-mode dimming film for sports glasses, applied to the product inspection method for a flexible dual-mode dimming film for sports glasses as described in any one of claims 1-9, wherein the specific system modules used include: The power loading module uses a servo motor and a film positioning fixture to complete the edge clamping and positioning of the dimming film, as well as the adjustment of the positioning stretch of the dimming film under axial tension, and applies the deformation pressure of the dimming film through a dynamic pressure pneumatic nozzle under the film. The dual-mode excitation module includes a programmable dynamic pressure pneumatic nozzle, a dual-mode drive power supply, and a synchronization control module. When the dynamic pressure pneumatic nozzle applies deformation pressure to the dimming film, the dual-mode drive power supply outputs a voltage signal, which is connected to the dimming film to enable the dimming film to synchronously change between dark and transparent states. The synchronization control module ensures that the deformation and bending action of the dimming film is synchronized with the voltage signal switching. The optical acquisition module includes a high-speed camera, a hyperspectral imager, and a synchronization trigger module. The high-speed camera acquires the changes in surface brightness and curvature during the deformation of the dimming film, while the hyperspectral imager analyzes the wavelength information of reflected and transmitted light from the pixels during the deformation of the dimming film. The synchronization trigger module is used to align the high-speed camera and the hyperspectral imager with the deformation and optical state of the dimming film at the moment of shooting. The parameter comparison module extracts time-dimensional, spatial-dimensional, and spectral-dimensional parameters, and compares the dynamic response parameters of the dimming film deformation and optical state switching with the static reference parameters of the dimming film to determine the influence of bending stress during dimming film deformation on the optical state switching speed of the film.

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