Welding seam detection device and detection method for igniter

Abstract

The invention provides a welding seam detection device and detection method for an igniter, and the device comprises a blanking assembly which is used for carrying out the vibration blanking of the igniter, a beat regulation and control assembly which is communicated with a bottom discharge port of the blanking assembly and is used for adjusting the feeding beat, and an inspection assembly which is communicated with a top discharge port of the beat regulation and control assembly. The method comprises the following steps: collecting original images from multiple angles through exposure time and focal length of a high-resolution industrial camera, then obtaining a standard welding seam image, extracting welding seam defect features, and utilizing an improved CNN (Convolutional Neural Network) model which introduces an attention mechanism to detect an igniter; the method comprises the following steps of: extracting defect feature information of a corrected image after training of a large number of labeled samples, then identifying defect types by using an SVM (Support Vector Machine) algorithm based on a preset feature vector space through defect identification and classification, and finally, outputting and storing a detection result, and intuitively displaying defect positions, types and severity on a monitoring terminal through a graphical interface.

Description

Technical Field

[0001] This invention relates to the field of ignition fixture weld inspection technology, and particularly to an ignition fixture weld inspection device and inspection method. Background Technology

[0002] Ignition devices are used to ignite gunpowder, propellant, or other combustibles, and are widely used in military, industrial, automotive safety, and firefighting fields. Their core function is to ignite the ignition element using specific forms of energy (such as electrical, mechanical, or chemical energy) to produce a flame or high-temperature gas, which then ignites the main charge. Ignition devices can be further subdivided into: inertial ignition devices: utilizing the inertial force of the projectile during firing, causing the firing pin to strike the percussion cap, igniting the delay charge, and ultimately igniting the rocket propellant (such as in extended-range projectiles); acid ignition devices: ignited by chemical energy, suitable for ignition requirements in specific environments; and partition ignition devices: utilizing the shock wave generated by the previous stage of the propellant to penetrate a metal partition, igniting the next stage of the propellant. These devices have a high pressure resistance and are highly safe.

[0003] The components of the ignition device include the ignition body (for fuel filling), the cap, and the electric ignition head. The ignition body is composed of a shell cover, a moisture-proof gasket, a gasket, and copper tubing. The assembly process involves manually or automatically loading the above structures with fuel and then connecting them. However, to further improve the airtightness of the assembled ignition device, a sealing welding process is usually used at the connection between the ignition body and the cap to improve the sealing effect.

[0004] However, currently, the production and subsequent inspection of ignition devices typically rely on manual labor. Some ignition device inspection processes, in an effort to improve efficiency, involve arranging the ignition devices on an assembly line, with production line workers then picking them up one by one and relying on their experience to inspect the welds. This approach hasn't significantly improved labor consumption. Furthermore, traditional ignition device transport lines, due to the shape limitations of the ignition devices, are limited to simply placing finished ignition devices on a conveyor belt for transport, without the ability to arrange or organize them during the process. This causes inconvenience for workers when picking up and inspecting the devices, and the disorderly arrangement of ignition devices can lead to accidental firing or damage. Additionally, traditional manual inspection standards rely solely on workers' experience, lacking standardized testing methods, resulting in significant variations in ignition device weld inspection operations and poor inspection quality. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a weld inspection device and method for ignition devices, so as to fundamentally solve the problem that current weld inspection devices for ignition devices cannot organize and arrange the ignition devices, resulting in inconvenience for workers when handling and inspecting them, and the arrangement is messy.

[0006] According to an embodiment of the present invention, a weld inspection device for an ignition device includes a feeding assembly for vibrating feeding of the ignition device, a rhythm control assembly connected to the bottom outlet of the feeding assembly and used for adjusting the feeding rhythm, a delivery assembly connected to the top outlet of the rhythm control assembly, and a weld inspection assembly sleeved on the outer surface of the delivery assembly and used for image recognition inspection of the ignition device. The feeding assembly includes a feeding hopper, multiple guide plates arranged alternately at an inclined angle inside the feeding hopper, a workpiece guide rail arranged at the bottom outlet of the feeding hopper, a workpiece positioning part flipped and arranged at the bottom outlet of the feeding hopper, and a vibration assembly arranged at the bottom of the feeding hopper. Specifically, the workpiece positioning section corrects and flips the ignition tools located at the discharge port of the hopper that do not meet the conveying position, and arranges them uniformly on the workpiece guide rail. The rhythm control assembly then pushes the ignition tools vertically towards or away from the inspection assembly one by one according to a preset rhythm. Finally, the inspection assembly pushes the ignition tools laterally into the weld inspection assembly for inspection.

[0007] Furthermore, the timing control assembly includes a base at the bottom, a telescopic cylinder at the top of the base, an output rod at the top output end of the telescopic cylinder, and a lifting assembly at the top of the output rod for pushing the igniter toward or away from the test assembly.

[0008] Furthermore, the lifting assembly includes a workpiece lifting part for wrapping the igniter, a spiral part embedded on the top of the workpiece lifting part for guiding the igniter to adjust its axial position, and a first discharge groove opened on the side of the workpiece lifting part away from the workpiece guide rail.

[0009] Furthermore, the feeding assembly also includes an electrostatic discharge section surrounding the outer surface of the feeding hopper, and the vibration component includes at least two damping platforms for supporting the feeding hopper, a damping section disposed between the two damping platforms, and at least one vibration motor disposed at the top of the damping platform, so as to realize the vibration feeding of the ignition device in the feeding hopper.

[0010] Furthermore, the inspection assembly package is connected to the top of the timing control assembly via a feeding guide rail, an ion fan is mounted on the feeding guide rail and located near the timing control assembly, a sliding feeder is slidably mounted on the feeding guide rail and used to push the igniter, an inspection guide rail is mounted on the feeding guide rail away from the ion fan, and a second discharge chute is mounted on the inspection guide rail away from the feeding guide rail. The inner side of the inspection guide rail is adapted to the outer surface of the igniter.

[0011] Furthermore, the weld inspection assembly includes an inspection box connected to the inspection assembly, a drive motor disposed on the top of the inspection box, an information acquisition component disposed at the output end of the drive motor and located inside the inspection box for collecting information on the ignition weld, at least one robotic arm disposed on the inner wall of the inspection box, and a processor embedded in the inspection box for information processing and equipment control.

[0012] Furthermore, the ignition device includes a fuel tank for containing fuel, a cover for sealing the fuel tank, at least two electrodes penetrating the cover into the fuel tank, and a weld for sealing the connection between the fuel tank and the cover.

[0013] A control method for a weld seam detection device of an ignition device according to an embodiment of the present invention is used to control the weld seam detection device of the ignition device of the present invention, the method comprising: The position information of the ignition device under test is obtained by the positioning detection device, and the light source device inside the detection box is adjusted based on the position information to enhance the image contrast. The information acquisition component surrounds the weld seam of the igniter in the circumferential direction and acquires original image data of the weld seam of the igniter at multiple preset angles. Based on the original image data, a deep learning model is used to train the weld seam image and extract the defect feature information of the weld seam. Based on the extracted defect feature information, the Support Vector Machine (SVM) classification algorithm is used to identify and classify defects. By pre-defining the feature vector space of different types of defects, the extracted defect features are matched with the preset feature vector space to determine the type of defect. At the same time, the severity of the defect is evaluated and graded according to parameters such as the geometric size and shape features of the defect. The results of defect identification and classification are displayed on the monitoring terminal in an intuitive graphical interface, clearly indicating the location, type and severity of the defects on the weld. The detection results data are stored in the database, and the detection results data includes at least the model, batch, and detection time of the ignition device, as well as the defect information.

[0014] Furthermore, after the step of acquiring original image data of the weld portion of the ignition device at multiple preset angles by means of an information acquisition component circumferentially surrounding the weld portion, the method further includes: The original image data was denoised using a wavelet transform-based image denoising algorithm, while preserving the edge and texture details of the weld. A combination of histogram equalization and contrast stretching is used to improve the overall contrast of the image, making the weld area clearer and more identifiable. Then, the image is geometrically corrected, and the image distortion caused by shooting angle and lens distortion is eliminated according to the pre-calibrated camera parameters and the geometric relationship of the inspection fixture, so as to obtain the corrected standard weld image.

[0015] Compared with the prior art, the ignition tool weld inspection device in the above embodiments of the present invention, through the workpiece positioning part, performs a corrective flipping of ignition tools located at the discharge port of the hopper that do not conform to the conveying position, and arranges them in a uniform orientation on the workpiece guide rail. Through the cycle control assembly, the feeding cycle of the ignition tools can be controlled to avoid the ignition tools being arranged too tightly, which would affect the quality of subsequent weld inspection. At the same time, through the spiral part, it can also drive the ignition tools to rotate and adjust along their own axis during the lifting and conveying process, so that the remaining ignition tools can be sequentially introduced into the inspection assembly and weld inspection assembly in the same orientation. This realizes the arrangement and organization of the ignition tools during the conveying process, so as to ensure the uniformity of the subsequent inspection process. This solves the problem that the current ignition tool weld inspection device cannot organize and arrange the ignition tools, which causes inconvenience for workers when picking them up for inspection and results in a messy arrangement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the weld inspection device for the ignition device in the first embodiment of the present invention; Figure 2 This is a partial structural diagram of the material feeding assembly in the weld inspection device of the ignition device in the first embodiment of the present invention; Figure 3 This is a schematic diagram of a partial cross-sectional structure of the hopper in the weld inspection device of the ignition device in the first embodiment of the present invention; Figure 4 This is a partial structural diagram of the cycle control assembly in the weld seam detection device of the ignition device in the first embodiment of the present invention; Figure 5 This is a partial structural diagram of the weld inspection device for the ignition device in the first embodiment of the present invention. Figure 6 This is a partial structural diagram of the weld detection assembly in the weld detection device of the ignition device according to the first embodiment of the present invention; Figure 7 This is a partial structural diagram of the ignition device in the weld inspection device of the ignition device in the first embodiment of the present invention; Figure 8 This is a flowchart of the control method for the weld seam detection device of the ignition tool in the second embodiment of the present invention.

[0017] Explanation of key component symbols:

[0018] The following detailed description of the embodiments will further illustrate the present invention in conjunction with the above-described accompanying drawings. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Example 1 Please see Figures 1 to 7The image shows a weld inspection device for an ignition device according to the first embodiment of the present invention. It includes a feeding assembly 1 for vibrating and feeding the ignition device 5; a rhythm control assembly 2 connected to the bottom outlet of the feeding assembly 1 and used to adjust the feeding rhythm; a delivery assembly 3 connected to the top outlet of the rhythm control assembly 2; and a weld inspection assembly 4 sleeved on the outer surface of the delivery assembly 3 for image recognition and inspection of the ignition device 5. The feeding assembly 1 includes a feeding hopper 11, multiple guide plates 12 alternately inclined within the feeding hopper 11, wherein the top of the guide plates 12 is provided with multiple guide grooves for guiding the ignition device 5; a workpiece guide rail 18 located at the bottom outlet of the feeding hopper 11; and a workpiece guide rail 18 flipped and located at the bottom outlet of the feeding hopper 11. The workpiece alignment part 17 and the vibration assembly provided at the bottom of the feeding hopper 11 are used to perform alignment and flipping of the ignition device 5 located at the discharge port of the feeding hopper 11 that does not meet the conveying position, and arrange them in a uniform orientation on the workpiece guide rail 18. In some optional embodiments, the workpiece alignment part 17 can be composed of a spring shaft and a baffle. When performing alignment operation, the baffle limits the movement of the ignition device 5 on its path. When the vibration assembly performs vibration feeding, the ignition device 5 is attached to the baffle and flipped. The rhythm control assembly 2 pushes the ignition device 5 vertically towards or away from the inspection assembly 3 one by one according to a preset rhythm. Finally, the inspection assembly 3 pushes the ignition device 5 laterally into the weld inspection assembly 4 for inspection.

[0023] Furthermore, the cycle control assembly 2 includes a base 21 at the bottom, a telescopic cylinder 22 at the top of the base 21, an output rod 23 at the top output end of the telescopic cylinder 22, and a lifting assembly at the top of the output rod 23 for pushing the igniter 5 toward or away from the inspection assembly 3. The lifting assembly includes a workpiece lifting part 24 for wrapping the igniter 5, and a spiral part 25 embedded in the top of the workpiece lifting part 24 for guiding the igniter 5 to adjust its axial position. It should be noted that there are two spiral parts 25, which are fixedly disposed on the inner wall of the top of the workpiece lifting part 24. The main contact is with the electrode 53 on the igniter 5, which guides the electrode 53 to rotate axially along the spiral path when it overlaps the spiral part 25, thus implementing a positive positioning adjustment. A first discharge chute 26 is opened on the side of the workpiece lifting part 24 away from the workpiece guide rail 18. The unloading assembly 1 also includes an electrostatic discharge part 13 surrounding the outer surface of the unloading hopper 11. The vibration assembly includes at least two damping platforms 15 for supporting the unloading hopper 11, a damping part 16 disposed between the two damping platforms 15, and at least one vibration motor 14 disposed at the top of the damping platform 15, so as to realize the vibration of the igniter 5 in the unloading hopper 11. The vibration feeding assembly includes a feeding guide rail 32 connected to the top of the cycle control assembly 2, an ion fan 31 mounted on the feeding guide rail 32 and located near the cycle control assembly 2, a sliding feeding component 33 slidably mounted on the feeding guide rail 32 for pushing the ignition device 5, a feeding guide rail 34 located on the side of the feeding guide rail 32 away from the ion fan 2, and a second discharge chute 35 located on the side of the feeding guide rail 34 away from the feeding guide rail 32. The inner side of the feeding guide rail 34 is adapted to the outer surface of the ignition device 35. The weld inspection assembly 4 includes an inspection box 41 connected to the feeding assembly 3. The device includes a drive motor 42 located on the top of the detection box 41, an information acquisition component 43 located at the output end of the drive motor 42 and inside the detection box 41 for acquiring information on the weld seam of the ignition device 5, at least one robotic arm 44 located on the inner wall of the detection box 41, and a processor 45 embedded in the detection box 41 for information processing and equipment control. The ignition device 5 includes a fuel tank 51 for holding fuel, a cover 52 for sealing the fuel tank 51, at least two electrodes 53 penetrating the cover 52 into the fuel tank 51, and a weld seam 54 for sealing the connection between the fuel tank 51 and the cover 52.

[0024] In specific implementation, firstly, the operator can pour the ignition device 5 to be tested along the guide plate 12 at the top of the feeding assembly 1. To reduce the collision force between the ignition device 5 and the guide plate 12, in some optional embodiments, rubber sleeves can be fitted to the cap 52 and electrode 53 of the ignition device 5, or rubber pads can be added to the contact area between the top of the guide plate 12 and the ignition device 5 to improve the protection of the ignition device 5. Afterwards, the operator can control the vibration motor 14 to start via the processor 45. In some optional embodiments of the present invention, the processor 45 can be installed on the weld detection device for the ignition device at any convenient location for the operator, and the controller can also be an MCU (Microcontroller Unit). The microcontroller unit (MCU) chip is used to control the weld seam detection device of the ignition fixture. The processor 45 is electrically connected to the weld seam detection device of the ignition fixture, and this electrical connection includes wired and wireless connections. Wireless connections include, but are not limited to, Bluetooth, WiFi, IF radio frequency, and Zigbee. Wired connections include, but are not limited to, network communication lines and USB lines connecting the weld seam detection device of the ignition fixture to the processor 45. Subsequently, the vibration motor 14 sequentially drives the damping table 15 and the feeding hopper 11 to perform a vibration feeding operation. During this process, the ignition fixture 5 moves along the inclined rail of the guide plate 12. The igniter 5 rolls along the guide plate 12, and in some alternative embodiments, the guide groove on the guide plate 12 can be designed in a triangular or trapezoidal shape so that the igniter 5 can be guided by the inclined surface in the guide groove and enter its guiding area when it rolls on the surface of the guide plate 12, realizing the initial material discharge operation. After that, the arranged igniters 5 roll down along the guide plate 12 in sequence and are arranged laterally at the bottom of the hopper 11, that is, the axial direction of the cover 52 is parallel to the workpiece guide rail 18. Then, the vibration motor 14 continuously outputs and cooperates with the counterweight 55 to make the igniter 5 automatically flip on the workpiece guide rail 18, so that the electrode 53 of the igniter 5 on the workpiece guide rail 18 always remains perpendicular to the ground. Figure 2As shown, in addition, to ensure smooth transmission of the ignition device 5 and avoid the ignition device 5 being restricted and unable to rotate due to workpiece stacking, a workpiece positioning part 17 is provided at the bottom discharge port of the hopper 11 to limit and assist the rotation operation of the unrotated ignition device 5. Specifically, regarding the size design of the ignition device 5, the diameter of the cover 52 is greater than the axial height of the cover 52 after sealing with the fuel tank 51, and the triggering length of the workpiece positioning part 17 is greater than the axial height of the cover 52 after sealing with the fuel tank 51 but less than the diameter of the cover 52. The length setting is understandable. After the igniter is automatically flipped, it can pass directly to the bottom of the workpiece positioning part 17. However, the igniter 5 that is parallel to the workpiece guide rail 18 or the stacked igniters 5 will be intercepted by the positioning part 17 and will pass through after the workpiece is flipped or turned over under the continuous output of the vibration motor 14. This design includes the research and development of the size of the igniter 5 and the qualification screening at the production line outlet. It achieves automatic arrangement, automatic flipping and automatic transmission of the igniter 5 with low equipment cost, which saves labor costs to a certain extent.

[0025] Furthermore, under the continuous output of the vibration motor 14, the igniter 5 moves along the workpiece guide rail 18 towards the side closer to the cycle control assembly 2, and directly enters the telescopic cylinder 22 to await subsequent pushing of the igniter 5. Specifically, the triggering method for the telescopic cylinder 22 can be based on adding a positioning sensor at the discharge port of the telescopic cylinder 22. When the igniter 5 is detected to have entered the telescopic cylinder 22, the output rod 23 is triggered to extend or retract. Alternatively, the triggering control conditions of the telescopic cylinder 22 can be set to correspond to the time required for subsequent detection by the weld seam detection assembly 4. For example, the weld seam detection assembly 4 may require 10 seconds to detect the igniter 5. The telescopic cylinder 22 is triggered once every 10 seconds to achieve cycle control of the feeding process. Furthermore, when the output rod 23 drives the workpiece lifting part 24 to push the igniter 5, the spiral part 25 in the workpiece lifting part 24 can directly contact the electrode 53 on the igniter 5. After contact, the electrode 53 can move along the spiral trajectory of the spiral part 25, so that the igniter 5 can rotate and adjust along its own axis during the lifting and transmission process, so that the remaining igniters 5 can be sequentially introduced into the inspection assembly 3 and the weld inspection assembly 4 in the same orientation, so as to ensure the uniformity of the subsequent inspection process.

[0026] Next, the igniter 5 is pushed into the feeding guide rail 32 by the workpiece lifting part 24, and then the sliding feeding part 33 is triggered. In some optional embodiments, a corresponding positioning sensor can be installed in the feeding guide rail 32 and electrically connected to the sliding feeding part 33. After detecting that the igniter 5 has arrived, the sliding feeding part 33 is triggered and pushes the igniter 5 along the trajectory of the feeding guide rail 32 to the first discharge trough 26 for discharge, sliding towards or away from the inspection guide rail 34. During the process, the ion fan 31 is turned on, and through... The ion blower 31 blows the ignition tool 5 to remove surface residues and negative ions, preventing static electricity and residues from affecting the quality of subsequent weld inspection. In some optional embodiments, the ion blower 31 can also be used as the power source for pushing the ignition tool 5. After the positioning sensor detects that the ignition tool 5 has entered the feeding guide rail 32, the ion blower 31 is controlled to turn on, and the ignition tool 5 is driven by wind power to slide along the trajectory of the feeding guide rail 32 and be guided into the inspection guide rail 34 to wait for the weld inspection operation.

[0027] Next, the weld seam of the ignition device 5 is inspected by the weld seam inspection assembly 4. The information acquisition component 43 is driven by the drive motor 42 to rotate around the weld seam 54 of the ignition device 5 and collect information. The collected information is then analyzed and processed. Specifically, the position information of the ignition device under test is obtained by the positioning detection device, and the light source device inside the detection box is adjusted based on the position information to enhance the image contrast. Then, the information acquisition component surrounds the weld seam of the ignition device circumferentially and collects original image data of the weld seam at multiple preset angles. Based on the original image data, a deep learning model is used to train the weld seam image and extract the defect feature information of the weld seam. Based on the extracted defect feature information, the Support Vector Machine (SVM) classification algorithm is used to identify and classify the defects. By pre-defining the feature vector space of different types of defects, the extracted defect features are matched with the preset feature vector space to determine the type of defect. At the same time, the severity of the defect is evaluated and graded according to the geometric size, shape features and other parameters of the defect. The results of defect identification and classification are displayed on the monitoring terminal in an intuitive graphical interface, clearly marking the location, type, and severity of defects on the weld. The detection results data are stored in the database, including at least the model, batch, and detection time of the igniter, as well as defect information. Finally, the weld inspection and processing operation of the igniter 5 is completed. Finally, the qualified igniters can be pushed along the inspection guide rail 34 to the second discharge trough 35 for export by the robotic arm 44. For the unqualified igniters 5, they are clamped and uniformly stored in the weld inspection assembly 4, such as in any storage space on the top of the processor 45, for the staff to retrieve.

[0028] In summary, the ignition tool weld inspection device in the above embodiments of the present invention, through the workpiece positioning part 17, performs a corrective flipping of the ignition tool 5 located at the discharge port of the hopper 11 that does not conform to the conveying position, and arranges it uniformly on the workpiece guide rail 18. Through the cycle control assembly 2, the feeding cycle of the ignition tool 5 can be controlled to avoid the ignition tool 5 being arranged too tightly, which would affect the quality of subsequent weld inspection. At the same time, through the spiral part 25, it can also drive the ignition tool 5 to rotate and adjust along its own axis during the upward conveying process, so that the remaining ignition tools 5 can be sequentially introduced into the inspection assembly 3 and the weld inspection assembly 4 in the same orientation. This realizes the arrangement and organization of the ignition tool 5 during the conveying process, so as to ensure the uniformity of the subsequent inspection process. It solves the problem that the current ignition tool weld inspection device cannot organize and arrange the ignition tools, which causes inconvenience for workers when picking them up for inspection and the arrangement is messy.

[0029] Example 2 Please see Figure 8 The figure shows a control method for a weld seam detection device for an ignition device according to the second embodiment of the present invention. The method is applied to the weld seam detection device for an ignition device and specifically includes steps S01-S04.

[0030] Step S01: Obtain the position information of the ignition device to be tested through the position detection device, and adjust the light source device inside the detection box based on the position information to enhance the image contrast.

[0031] In practical implementation, the position information of the ignition device under test within the weld inspection assembly 4 is obtained through the positioning detection device. Based on this position information, the light source device inside the inspection chamber is adjusted. In some optional embodiments of this invention, the light source device can be a multi-angle ring light source or a coaxial light source. The multi-angle ring light source illuminates the weld from different incident angles, highlighting the texture details of the weld surface and making the microscopic features of the weld more clearly visible. During adjustment, it is necessary to ensure that the ring light source is uniformly surrounding the weld, and that the illumination light from each angle can fully cover the weld area. The coaxial light source's main function is to eliminate reflected light interference and enhance image contrast. When adjusting the coaxial light source, its optical axis must be precisely aligned with the camera's optical axis so that the light can perpendicularly illuminate the weld surface, thereby effectively reducing the impact of reflected light on image quality.

[0032] Step S02: The information acquisition component surrounds the weld seam of the igniter in the circumferential direction and acquires original image data of the weld seam of the igniter at multiple preset angles. Based on the original image data, a deep learning model is used to train the weld seam image and extract the defect feature information of the weld seam.

[0033] In practice, a high-resolution industrial camera is used for image acquisition. Before acquisition, appropriate exposure time and focal length parameters need to be set according to the actual inspection scene and weld characteristics. The exposure time should be set to avoid overexposure due to excessive exposure or underexposure due to excessive exposure. The focal length parameter should ensure that the weld area can be clearly imaged. After setting the parameters, raw image data of the ignition tool weld is acquired from multiple preset angles to obtain comprehensive and accurate weld image information.

[0034] Furthermore, the acquired original image data is denoised using a wavelet transform image denoising algorithm while preserving the edge and texture details of the weld. A combination of histogram equalization and contrast stretching is employed to enhance the overall image contrast, making the weld area more clearly discernible. Subsequently, geometric correction is performed on the image, and image distortion caused by shooting angle and lens distortion is eliminated based on pre-calibrated camera parameters and the geometric relationship of the detection fixture, resulting in a corrected standard weld image. Based on this standard weld image, a deep learning model is used to train the weld image and extract the defect feature information of the weld. In some optional embodiments of this invention, the image preprocessing method also includes image enhancement. To improve the overall image contrast and make the weld area more clearly discernible, a combination of histogram equalization and contrast stretching is used for image enhancement. Histogram equalization can redistribute the gray values ​​of image pixels, making the gray-level distribution of the image more uniform; contrast stretching further enhances the image contrast by adjusting the gray-level range of the image. Combining these two methods can effectively improve the visual effect of images. Alternatively, geometric correction can be used to address image distortion issues caused by factors such as shooting angle and lens distortion. This system performs geometric correction on the image based on pre-calibrated camera parameters and the geometric relationship of the inspection fixture. By establishing a mapping relationship between the image coordinate system and the actual coordinate system, image distortion is eliminated, resulting in a corrected standard weld image, ensuring the accuracy of subsequent defect detection.

[0035] Next, based on the original image data, a deep learning model is used to train the weld images and extract the defect features of the welds. The deep learning model is then used to extract features from the corrected standard weld images. This deep learning model employs a modified convolutional neural network (CNN) structure, introducing an attention mechanism module. This attention mechanism module enables the model to automatically focus on key features of the weld region, improving its ability to extract defect features. A large number of labeled weld defect image samples are used to train the model. During training, sample images are input into the model, and by continuously adjusting the model's parameters, the model learns the feature representations of different types of defects such as cracks, porosity, and lack of fusion. After training, the model will have the ability to accurately extract weld defect features. The corrected standard weld images are then input into the trained deep learning model, which automatically analyzes and processes the images to extract the weld defect features. These features will serve as an important basis for subsequent defect identification and classification.

[0036] Step S03: Based on the extracted defect feature information, the Support Vector Machine (SVM) classification algorithm is used to identify and classify defects. By pre-defining the feature vector spaces of different types of defects, the extracted defect features are matched with the preset feature vector spaces to determine the type of defect. At the same time, the severity of the defect is evaluated and graded according to parameters such as the geometric size and shape features of the defect.

[0037] In practical implementation, based on the extracted defect feature information, this invention uses a Support Vector Machine (SVM) classification algorithm to identify and classify defects. The SVM algorithm has powerful classification capabilities, able to find the optimal classification hyperplane in high-dimensional space, accurately separating different types of defects. Then, by pre-defining feature vector spaces for different types of defects—a mathematical description of the features of each type—the extracted defect features are matched with the pre-defined feature vector spaces to determine the defect type. For example, for crack defects, the feature vector space may contain feature parameters such as crack length, width, and orientation; for porosity defects, it may contain feature parameters such as pore size, shape, and distribution. In addition to identifying the defect type, the system also assesses and grades the severity of defects based on parameters such as geometric dimensions and shape characteristics. For example, for crack defects, they can be classified into three levels—minor, moderate, and severe—based on crack length and width; for porosity defects, they can be graded based on pore size and number. The assessment results will provide an important reference for the quality judgment of ignition devices.

[0038] Step S04: Display the results of defect identification and classification on the monitoring terminal in an intuitive graphical interface, clearly indicating the location, type and severity of the defect on the weld, and store the test result data in the database. The test result data includes at least the model, batch, and test time of the ignition device, as well as the defect information.

[0039] In practice, the results of defect identification and classification are displayed on the monitoring terminal in an intuitive graphical interface. This interface clearly marks the specific location, type, and severity of defects on the weld. Operators can intuitively understand the quality status of the ignition fixture welds through this interface, promptly identifying any defects. Simultaneously, the system stores the inspection results data in a database. The stored data includes detailed information such as the ignition fixture model, batch, inspection time, and defect information. This data storage not only facilitates subsequent quality traceability and enables rapid location of production information and inspection records for problematic products, but also provides rich data support for statistical analysis. By analyzing a large amount of inspection data, the overall trend of product quality and common defect types can be understood, providing a valuable basis for improving production processes and optimizing quality control strategies.

[0040] In summary, this invention enables non-contact weld inspection through image acquisition. Specifically, the igniter is fixed to a dedicated fixture to ensure the weld is in a standard inspection position. Multi-angle ring and coaxial light sources are used for illumination to highlight texture and eliminate reflection interference. The exposure time and focal length of a high-resolution industrial camera are set to acquire original images from multiple angles. Then, image preprocessing is performed, using wavelet transform algorithms for noise reduction while preserving edges and textures. Histogram equalization and contrast stretching are used to enhance the image. Image distortion is corrected based on calibration parameters and geometric relationships to obtain a standard weld image. Weld defect features are extracted using an improved CNN model incorporating an attention mechanism. After training with a large number of labeled samples, defect feature information is extracted from the corrected image. Next, defect identification and classification are performed using an SVM algorithm based on a preset feature vector space to identify defect types. The severity of defects is assessed and graded based on geometric dimensions and shape features. Finally, the inspection results are output and stored, and the defect location, type, and severity are displayed intuitively on a monitoring terminal via a graphical interface. The igniter model, batch, inspection time, and defect information are stored in a database for easy traceability and statistical analysis.

[0041] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A weld inspection device for an ignition device, characterized in that, It includes a feeding assembly for vibrating feeding of the ignition device, a rhythm control assembly connected to the bottom outlet of the feeding assembly and used to adjust the feeding rhythm, an inspection assembly connected to the top outlet of the rhythm control assembly, and a weld detection assembly sleeved on the outer surface of the inspection assembly and used for image recognition detection of the ignition device. The feeding assembly includes a feeding hopper, multiple guide plates arranged alternately at an inclined angle inside the feeding hopper, a workpiece guide rail arranged at the bottom outlet of the feeding hopper, a workpiece positioning part flipped and arranged at the bottom outlet of the feeding hopper, and a vibration assembly arranged at the bottom of the feeding hopper. Specifically, the workpiece positioning section corrects and flips the ignition tools located at the discharge port of the hopper that do not meet the conveying position, and arranges them uniformly on the workpiece guide rail. The rhythm control assembly then pushes the ignition tools vertically towards or away from the inspection assembly one by one according to a preset rhythm. Finally, the inspection assembly pushes the ignition tools laterally into the weld inspection assembly for inspection.

2. The weld inspection device for ignition equipment according to claim 1, characterized in that, The beat control assembly includes a base at the bottom, a telescopic cylinder at the top of the base, an output rod at the top output end of the telescopic cylinder, and a lifting component at the top of the output rod for pushing the igniter toward or away from the test assembly.

3. The weld inspection device for ignition equipment according to claim 2, characterized in that, The lifting assembly includes a workpiece lifting part for wrapping the igniter, a spiral part embedded on the top of the workpiece lifting part for guiding the igniter to adjust its axial position, and a first discharge groove opened on the side of the workpiece lifting part away from the workpiece guide rail.

4. The weld inspection device for ignition equipment according to claim 3, characterized in that, The feeding assembly also includes an electrostatic discharge section surrounding the outer surface of the feeding hopper, and the vibration assembly includes at least two damping platforms for supporting the feeding hopper, a damping section disposed between the two damping platforms, and at least one vibration motor disposed at the top of the damping platform, so as to realize the vibration feeding of the ignition device in the feeding hopper.

5. The weld inspection device for an ignition device according to claim 4, characterized in that, The inspection assembly package is connected to the top of the timing control assembly via a feeding guide rail, an ion fan is mounted on the feeding guide rail and located near the timing control assembly, a sliding feeder is slidably mounted on the feeding guide rail and used to push the igniter, an inspection guide rail is mounted on the feeding guide rail away from the ion fan, and a second discharge chute is mounted on the inspection guide rail away from the feeding guide rail. The inner side of the inspection guide rail is adapted to the outer surface of the igniter.

6. The weld inspection device for an ignition device according to claim 5, characterized in that, The weld inspection assembly includes an inspection box connected to the inspection assembly, a drive motor disposed on the top of the inspection box, an information acquisition component disposed at the output end of the drive motor and located inside the inspection box for collecting information on the ignition weld, at least one robotic arm disposed on the inner wall of the inspection box, and a processor embedded in the inspection box for information processing and equipment control.

7. The weld inspection device for an ignition device according to claim 6, characterized in that, The ignition device includes a fuel tank for containing fuel, a cover for sealing the fuel tank, at least two electrodes penetrating the cover into the fuel tank, and a weld for sealing the connection between the fuel tank and the cover.

8. A control method for a weld seam detection device for an ignition tool, characterized in that, A weld inspection device for operating an ignition device according to any one of claims 1 to 7, the method comprising: The position information of the ignition device under test is obtained by the positioning detection device, and the light source device inside the detection box is adjusted based on the position information to enhance the image contrast. The information acquisition component surrounds the weld seam of the igniter in the circumferential direction and acquires original image data of the weld seam of the igniter at multiple preset angles. Based on the original image data, a deep learning model is used to train the weld seam image and extract the defect feature information of the weld seam. Based on the extracted defect feature information, the Support Vector Machine (SVM) classification algorithm is used to identify and classify defects. By pre-defining the feature vector space of different types of defects, the extracted defect features are matched with the preset feature vector space to determine the type of defect. At the same time, the severity of the defect is evaluated and graded according to parameters such as the geometric size and shape features of the defect. The results of defect identification and classification are displayed on the monitoring terminal in an intuitive graphical interface, clearly indicating the location, type and severity of the defects on the weld. The detection results data are stored in the database, and the detection results data includes at least the model, batch, and detection time of the ignition device, as well as the defect information.

9. A control method for a weld seam detection device for an ignition tool, characterized in that, After the step of acquiring original image data of the weld seam of the igniter by circumferentially surrounding the weld seam of the igniter with the information acquisition component, the method further includes: The original image data was denoised using a wavelet transform-based image denoising algorithm, while preserving the edge and texture details of the weld. A combination of histogram equalization and contrast stretching is used to improve the overall contrast of the image, making the weld area clearer and more identifiable. Then, the image is geometrically corrected, and the image distortion caused by shooting angle and lens distortion is eliminated according to the pre-calibrated camera parameters and the geometric relationship of the inspection fixture, so as to obtain the corrected standard weld image.

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