Defect upgrading inspection method and system after fluorescence permeation

Abstract

The invention is applicable to the field of fluorescent penetrant detection, and provides a defect upgrading inspection method and system after fluorescent penetrant, and the method comprises the following steps: acquiring workpiece placement sensing information; based on the workpiece placement sensing information, generating and sending a workpiece surface cleanliness detection instruction and obtaining workpiece surface cleanliness information; on the basis of the workpiece surface cleanliness information, workpiece feature information is recognized and generated, and a workpiece targeted penetration instruction and a developer spraying instruction are generated and sent; generating a personalized ultraviolet light pulse instruction based on the workpiece feature information; workpiece defect images are collected and recognized, a workpiece visual report is generated and output, cleanliness pre-detection is set, misjudgment is effectively avoided, workpiece characteristics are adapted according to different workpiece working conditions, targeted penetration and intelligent spraying, ultraviolet light optimization imaging is carried out, the follow-up inspection image precision is improved, meanwhile, rapid judgment is carried out by means of a high-precision sensor, and the detection accuracy is improved. And erroneous judgment caused by visual fatigue or subjective negligence of workers is completely eradicated.

Description

Technical Field

[0001] The present invention belongs to the field of fluorescent penetration testing, and in particular relates to a method and system for upgrading and inspecting defects after fluorescent penetration. Background Art

[0002] In industrial manufacturing, especially in the fields of aerospace, automobiles, precision machinery, etc., the quality requirements for parts are extremely high, and even tiny defects may cause serious safety accidents. Fluorescent penetrant testing, as a commonly used non-destructive testing method, is widely used to detect surface open defects such as cracks and pores on metals, ceramics and other materials.

[0003] However, the traditional fluorescent penetrant testing process has limitations, and the subsequent observation phase of traditional fluorescent penetrant testing is highly dependent on manual operation. Inspectors need to work in a black light environment for a long time, using their naked eyes to carefully identify defects on the surface of parts after fluorescent penetrant imaging. However, long-term exposure to black light radiation can easily cause visual fatigue and damage, which not only harms the health of inspectors, but also significantly reduces inspection efficiency as working hours increase. At the same time, manual observation is greatly affected by subjective factors, and it is difficult for different inspectors to unify the judgment standards for defects, which is prone to misjudgment and missed judgment, and cannot meet the current strict requirements of industrial production for high-precision and high-reliability inspections.

[0004] With the rapid development of science and technology, robotics and machine vision systems have become increasingly mature, providing the possibility of breaking through the bottleneck of traditional manual inspection. The organic combination of advanced robotic control technology and high-precision visual inspection systems is expected to achieve the automation and intelligent transformation of post-fluorescence penetration defect detection, which can not only greatly improve the detection efficiency, but also ensure the accuracy and stability of the detection results. Therefore, it is urgent to develop a post-fluorescence penetration defect upgrade inspection method and system. Summary of the invention

[0005] The object of the present invention is to provide a method and system for upgrading defect inspection after fluorescent penetration, aiming to solve the problems raised in the above-mentioned background technology.

[0006] The present invention is implemented in this way. On the one hand, a method for inspecting defects after fluorescent penetration upgrades, the method comprising:

[0007] Obtain workpiece placement sensing information;

[0008] Based on the workpiece placement sensing information, generate and send workpiece surface cleanliness detection instructions and obtain workpiece surface cleanliness information;

[0009] Based on the workpiece surface cleanliness information, identify and generate workpiece feature information, generate and send workpiece targeted penetration instructions and developer spraying instructions;

[0010] Generate personalized UV pulse instructions based on workpiece feature information;

[0011] Collect and identify workpiece defect images, generate and output workpiece visualization reports.

[0012] As a further solution of the present invention, the generating and sending of workpiece surface cleanliness detection instructions and obtaining workpiece surface cleanliness information based on workpiece placement sensing information specifically includes:

[0013] Retrieve workpiece placement sensing information;

[0014] Identify the maximum number of particles per unit area of ​​the workpiece;

[0015] Determine whether the maximum number of particles per unit area of ​​the workpiece is less than the particle number threshold;

[0016] If the maximum number of particles per unit area of ​​the workpiece is less than the particle number threshold, a first-level qualified feedback information is generated;

[0017] Identify the characteristic peak intensity value of oil stain on workpiece;

[0018] Determine whether the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold;

[0019] If the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold, a second-level qualified feedback information is generated;

[0020] Check whether the first-level qualified feedback information and the second-level qualified feedback information exist at the same time;

[0021] If the first-level qualified feedback information and the second-level qualified feedback information exist at the same time, the workpiece surface cleanliness qualified information is generated.

[0022] As a further solution of the present invention, the identification and generation of workpiece feature information based on the workpiece surface cleanliness information, and the generation and sending of workpiece targeted penetration instructions and developer spraying instructions specifically include:

[0023] Retrieve workpiece surface cleanliness qualification information;

[0024] Collect and identify the workpiece spectral bands to generate workpiece material information;

[0025] Obtain workpiece process information and generate workpiece estimated defect type information;

[0026] Obtain workpiece material information and estimated defect type information, and match penetrant temperature adjustment instructions and penetration time control instructions;

[0027] Generates a countdown for developer spraying based on the penetration time.

[0028] As a further solution of the present invention, the generating of personalized ultraviolet light pulse instructions based on workpiece feature information specifically includes:

[0029] Identify and determine workpiece material information;

[0030] If the workpiece is made of metal, high-frequency pulsed ultraviolet light is generated;

[0031] If the workpiece is a non-metallic insulating material, low-frequency pulsed ultraviolet light is generated.

[0032] As a further solution of the present invention, the generating of personalized ultraviolet light pulse instructions based on workpiece feature information specifically further includes:

[0033] Identify and determine estimated defect type information;

[0034] When the estimated defect type information is a large-area shallow crack, high-frequency pulsed purple light is generated;

[0035] When the defect type information is estimated to be a tiny void or an internal crack, a low-frequency pulsed violet light is generated.

[0036] As a further solution of the present invention, on the other hand, a fluorescent post-penetration defect upgrade inspection system is provided, the system comprising:

[0037] An acquisition module, used to acquire workpiece placement sensing information;

[0038] A first generating and sending module is used to generate and send a workpiece surface cleanliness detection instruction and obtain workpiece surface cleanliness information based on the workpiece placement sensing information;

[0039] An identification and generation module is used to identify and generate workpiece feature information based on the workpiece surface cleanliness information;

[0040] The second generation and sending module generates and sends a workpiece targeted penetration instruction and a developer spraying instruction;

[0041] A generation module, used for generating personalized ultraviolet light pulse instructions;

[0042] An acquisition and recognition module is used to acquire and recognize workpiece defect images;

[0043] Generate output module, used to generate and output artifact visualization report.

[0044] As a further solution of the present invention, the first generating and sending module specifically includes:

[0045] A first retrieval unit, used to retrieve workpiece placement sensing information;

[0046] The first recognition unit is used to recognize the maximum number of particles per unit area of ​​the workpiece;

[0047] A first judging unit is used to judge whether the maximum number of particles per unit area of ​​the workpiece is less than a particle number threshold;

[0048] A first generating unit is used to generate first-level qualified feedback information if the maximum number of particles per unit area of ​​the workpiece is less than a particle number threshold;

[0049] The second identification unit is used to identify the characteristic peak intensity value of the oil stain on the workpiece;

[0050] The second judgment unit is used to judge whether the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold;

[0051] The second generating unit is used to generate secondary qualified feedback information if the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold;

[0052] A detection unit, used to detect whether the first-level qualified feedback information and the second-level qualified feedback information exist at the same time;

[0053] The third generating unit is used to generate workpiece surface cleanliness qualification information if the first-level qualified feedback information and the second-level qualified feedback information exist at the same time.

[0054] As a further solution of the present invention, the second generating and sending module specifically includes:

[0055] The second retrieval unit is used to retrieve the qualified cleanliness information of the workpiece surface;

[0056] An acquisition and identification unit, used for acquiring and identifying the spectral band of the workpiece;

[0057] A fourth generating unit, used for generating workpiece material information;

[0058] A first acquisition unit, used for acquiring workpiece process information;

[0059] A fifth generating unit, used to generate workpiece estimated defect type information;

[0060] A second acquisition unit is used to acquire workpiece material information and estimated defect type information;

[0061] A matching unit, used for matching penetrant temperature adjustment instructions and penetration time control instructions;

[0062] The sixth generating unit is used to generate a developer spraying countdown based on the penetration time.

[0063] As a further solution of the present invention, the generation module specifically includes:

[0064] A first identification and judgment unit, used to identify and judge the material information of the workpiece;

[0065] The seventh generating unit is used to generate high-frequency pulsed ultraviolet light if the workpiece is made of metal;

[0066] The eighth generating unit is used to generate low-frequency pulsed ultraviolet light if the workpiece is made of non-metallic insulating material.

[0067] As a further solution of the present invention, the generation module specifically further includes:

[0068] A second identification and judgment unit is used to identify and judge the estimated defect type information;

[0069] A ninth generating unit, used for generating high-frequency pulsed purple light when the estimated defect type information is a large-area shallow crack;

[0070] The tenth generation unit is used to generate low-frequency pulsed purple light when the estimated defect type information is a tiny gap or an internal crack.

[0071] The present invention provides a method and system for upgrading the inspection of defects after fluorescent penetration. The method and system are provided with a pre-cleanliness detection to effectively avoid misjudgment. According to different workpiece working conditions, targeted penetration and intelligent spraying are adapted to the workpiece characteristics, and ultraviolet light is optimized for imaging to improve the accuracy of subsequent inspection images. At the same time, rapid judgment by high-precision sensors is carried out to eliminate misjudgment caused by manual visual fatigue or subjective negligence, thereby comprehensively improving detection accuracy and efficiency and further assisting quality control. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 It is a main flow chart of the defect upgrade inspection method after fluorescent penetration.

[0073] Figure 2 The invention discloses a flow chart of generating and sending workpiece surface cleanliness detection instructions and obtaining workpiece surface cleanliness information based on workpiece placement sensing information in a method for upgrading defects after fluorescent penetration.

[0074] Figure 3 The invention discloses a flow chart for identifying and generating workpiece feature information based on workpiece surface cleanliness information, and generating and sending workpiece targeted penetration instructions and developer spraying instructions in a method for upgrading defects after fluorescent penetration.

[0075] Figure 4 The present invention is a flowchart of a first embodiment of generating personalized ultraviolet light pulse instructions based on workpiece feature information in a method for upgrading defect inspection after fluorescent penetration.

[0076] Figure 5 The present invention is a flow chart of a second embodiment of a method for upgrading defect inspection after fluorescent penetration, for generating personalized ultraviolet light pulse instructions based on workpiece feature information.

[0077] Figure 6 It is a main structural diagram of a fluorescent penetration post-defect upgrade inspection system.

[0078] Figure 7The present invention is a structural block diagram of a first generation and sending module in a fluorescent post-penetration defect upgrade inspection system.

[0079] Figure 8 The invention is a structural block diagram of a second generation sending module in a defect upgrade inspection system after fluorescent penetration.

[0080] Fig. 9 The present invention is a structural block diagram of a first embodiment of a generation module in a fluorescent post-penetration defect upgrade inspection system.

[0081] Fig.10 The present invention is a structural block diagram of a second embodiment of a generation module in a fluorescent post-penetration defect upgrade inspection system. DETAILED DESCRIPTION

[0082] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0083] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0084] The present invention provides a method and system for upgrading and inspecting defects after fluorescence penetration, which solves the technical problems in the background technology.

[0085] like Figure 1 As shown, it is a main flow chart of a method for upgrading inspection of defects after fluorescent penetration provided by an embodiment of the present invention, and the method for upgrading inspection of defects after fluorescent penetration includes:

[0086] Step S100: Acquiring workpiece placement sensing information;

[0087] Step S200: Based on the workpiece placement sensing information, generate and send a workpiece surface cleanliness detection instruction and obtain the workpiece surface cleanliness information;

[0088] Step S300: Based on the workpiece surface cleanliness information, identify and generate workpiece feature information, generate and send workpiece targeted penetration instructions and developer spraying instructions;

[0089] Step S400: generating a personalized ultraviolet light pulse instruction based on the workpiece feature information;

[0090] Step S500: collecting and identifying workpiece defect images, generating and outputting workpiece visualization reports;

[0091] When this embodiment is applied, the system is equipped with robotic automated workpiece transfer equipment, robotic spraying equipment and high-precision visual image industrial acquisition cameras. The robotic automated workpiece transfer equipment can directionally transfer the workpiece to be inspected to a designated position. A pressure sensor is installed at the designated position. Then, when the workpiece passes through the robotic automated workpiece transfer equipment to the designated position, the workpiece placement sensing information is obtained. First, a workpiece surface cleanliness detection instruction is generated and the workpiece surface cleanliness information is obtained. If there is residual oil or impurities on the workpiece surface, it is easy to cause misjudgment, cover up real defects or produce false positive results. When the workpiece surface cleanliness meets the requirements, based on the workpiece surface cleanliness information, the workpiece feature information is identified and generated. The feature information includes workpiece material information and estimated defect type information. Different workpiece targeted penetration instructions and Developer spraying instructions, different workpiece targeted penetration instructions, penetration of penetrants at different temperatures and different penetration times. When the penetrant penetration is completed, based on the sent developer spraying instructions, the robot spraying equipment is controlled to spray the developer at the designated position according to the preset spraying trajectory. When the developer spraying is completed, based on the workpiece feature information, the ultraviolet light pulse frequency is adjusted according to the different component materials, the fluorescence excitation effect is optimized, the image contrast is improved, and the subsequent defect display is clearer. Then the high-precision visual image industrial acquisition camera collects the workpiece defect image with fluorescence display, transmits it to the image analysis software, uses the deep learning-based image recognition algorithm to identify the defect features, combines the laser confocal microscope to measure the defect depth, accurately judges the defect nature, size, shape and depth, and finally outputs the workpiece visualization report to facilitate subsequent quality control and query.

[0092] like Figure 2 As shown, as a preferred embodiment of the present invention, the generating and sending of workpiece surface cleanliness detection instructions and obtaining workpiece surface cleanliness information based on workpiece placement sensing information specifically includes:

[0093] Step S201: Retrieve workpiece placement sensing information;

[0094] Step S202: Identify the maximum number of particles per unit area of ​​the workpiece;

[0095] Step S203: determining whether the maximum number of particles per unit area of ​​the workpiece is less than a particle number threshold;

[0096] Step S204: if the maximum number of particles per unit area of ​​the workpiece is less than the particle number threshold, a first-level qualified feedback information is generated;

[0097] Step S205: identifying the characteristic peak intensity value of the oil stain on the workpiece;

[0098] Step S206: determining whether the intensity value of the characteristic peak of the oil pollution on the workpiece is less than an intensity threshold;

[0099] Step S207: if the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold, generating secondary qualified feedback information;

[0100] Step S208: Detect whether the first-level qualified feedback information and the second-level qualified feedback information exist at the same time;

[0101] Step S209: if the first-level qualified feedback information and the second-level qualified feedback information exist at the same time, generate workpiece surface cleanliness qualified information;

[0102] When this embodiment is applied, when the workpiece placement sensing information is retrieved, the particle and oil stain detection on the workpiece surface is performed simultaneously. When the workpiece surface particle detection is performed, the maximum number of particles per unit area of ​​the workpiece is identified, and it is determined whether the maximum number of particles per unit area of ​​the workpiece is less than the particle number threshold. If the maximum number of particles per unit area of ​​the workpiece is less than the particle number threshold, a first-level qualified feedback information is generated. At the same time, in order to avoid interference from particles in the external environment, the detection process should be performed in a clean environment. When the workpiece surface oil stain detection is performed, Fourier transform infrared spectroscopy is used to detect the oil stain residue on the workpiece surface, the workpiece oil stain characteristic peak intensity value is identified, and it is determined whether the workpiece oil stain characteristic peak intensity value is less than the intensity threshold. If the workpiece oil stain characteristic peak intensity value is less than the intensity threshold, a second-level qualified feedback information is generated, and it is detected whether the first-level qualified feedback information and the second-level qualified feedback information exist at the same time. If the first-level qualified feedback information and the second-level qualified feedback information exist at the same time, it indicates that the workpiece meets the basic requirements of subsequent detection, and the workpiece surface cleanliness qualified information is generated.

[0103] like Figure 3 As shown, as a preferred embodiment of the present invention, the identification and generation of workpiece feature information based on the workpiece surface cleanliness information, the generation and sending of workpiece targeted penetration instructions and developer spraying instructions specifically include:

[0104] Step S301: Retrieve workpiece surface cleanliness qualification information;

[0105] Step S302: Collect and identify the workpiece spectral band to generate workpiece material information;

[0106] Step S303: Acquire workpiece process information and generate workpiece estimated defect type information;

[0107] Step S304: obtaining workpiece material information and estimated defect type information, and matching penetrant temperature adjustment instructions and penetration time control instructions;

[0108] Step S305: generating a developer spraying countdown based on the penetration time;

[0109] When this embodiment is applied, when the qualified information of the surface cleanliness of the workpiece is retrieved, the workpiece material can be identified by a spectrometer. The high-precision spectrometer scans the workpiece and accurately determines the workpiece material according to the absorption and reflection spectral characteristics of different materials in specific bands. At the same time, the workpiece process information is obtained. Based on the preset algorithm, the workpiece estimated defect type information can be generated. For example, if the workpiece undergoes a high-temperature forging process, it may have a thermal crack defect. A penetration characteristic comparison database is preset. Different workpiece material information and estimated defect type information correspond to different penetrant temperatures and penetration times. When the workpiece material information and estimated defect type information are obtained, the corresponding penetrant temperature adjustment instructions and penetration time control instructions can be matched to ensure that the penetration effect is optimal, so that the penetrant fully infiltrates possible defect sites, laying the foundation for subsequent imaging links. A microfluidic penetration device can be used to ensure that the penetrant covers the workpiece surface evenly and stably to improve the penetration effect. Once the penetrant begins to penetrate, the countdown mechanism is started synchronously. According to the pre-set penetration time, the remaining time is accurately calculated. When the countdown reaches zero, the developer spraying instruction is immediately triggered to ensure that the developer can be sprayed onto the workpiece surface at the best time.

[0110] like Figure 4 As shown, as a preferred embodiment of the present invention, the generation of personalized ultraviolet light pulse instructions based on workpiece feature information specifically includes:

[0111] Step S401: Identify and determine workpiece material information;

[0112] Step S402: if the workpiece is made of metal, generate high-frequency pulsed ultraviolet light;

[0113] Step S403: if the workpiece is a non-metallic insulating material, generate low-frequency pulsed ultraviolet light;

[0114] It should be understood that the material information of the workpiece should be identified and judged first. If the workpiece is made of metal, high-frequency pulsed ultraviolet light is generated. Since the surface electronic structure of metal materials is relatively active, under the irradiation of high-frequency pulsed ultraviolet light, it can stimulate stronger fluorescence signals, so that the luminescence effect of the fluorescent penetrant adsorbed on the tiny defects on the surface is significantly enhanced, which is conducive to clear imaging; if the workpiece is made of non-metallic insulating material, low-frequency pulsed ultraviolet light is generated. The internal crystal structure of non-metallic insulating materials is relatively stable, and low-frequency pulsed ultraviolet light is more conducive to slowly and deeply exciting fluorescence, avoiding fluorescence quenching due to excessively high frequency shocks, thereby accurately highlighting the defect characteristics.

[0115] like Figure 5 As shown, as a preferred embodiment of the present invention, the generating of personalized ultraviolet light pulse instructions based on workpiece feature information specifically further includes:

[0116] Step S411: identifying and determining estimated defect type information;

[0117] Step S412: when the estimated defect type information is a large-area shallow crack, high-frequency pulsed purple light is generated;

[0118] Step S413: when the estimated defect type information is a tiny gap or an internal crack, generating a low-frequency pulsed purple light;

[0119] When this embodiment is applied, the estimated defect type information is first identified and determined. When the estimated defect type information is a large-area shallow crack, this type of defect is usually more obvious and has a relatively wide distribution range. The system will determine that the current detection needs are rapid initial screening and large-area inspection. At this time, according to the preset algorithm, a high-frequency ultraviolet light pulse frequency is quickly generated. The high-frequency pulse prompts the fluorescent penetrant to quickly glow in large-area shallow cracks. The inspector can scan a large surface area of ​​the workpiece in a short time and quickly locate these suspected defective parts with obvious signs of luminescence; when the estimated defect type information is a tiny gap or internal crack, this type of defect is highly concealed and small in size, and requires careful identification, generating low-frequency pulsed purple light to extend the single irradiation time. The low-frequency pulse allows the fluorescence of the penetrant to be released continuously and stably in tiny pores or internal fine cracks. Combined with the extremely high sensitivity of the high-precision visual image acquisition equipment, it can capture extremely weak fluorescence changes.

[0120] like Figure 6 As shown, as another preferred embodiment of the present invention, on the other hand, a fluorescent post-penetration defect upgrade inspection system, the system comprises:

[0121] An acquisition module 100 is used to acquire workpiece placement sensing information;

[0122] A first generating and sending module 200 is used to generate and send a workpiece surface cleanliness detection instruction and obtain workpiece surface cleanliness information based on the workpiece placement sensing information;

[0123] The identification and generation module 300 is used to identify and generate workpiece feature information based on the workpiece surface cleanliness information;

[0124] The second generating and sending module 400 generates and sends a workpiece targeted penetration instruction and a developer spraying instruction;

[0125] A generating module 500, for generating a personalized ultraviolet light pulse instruction;

[0126] The acquisition and recognition module 600 is used to acquire and recognize workpiece defect images;

[0127] The generation and output module 700 is used to generate and output a workpiece visualization report.

[0128] When this embodiment is applied, the acquisition module 100 acquires the workpiece placement sensing information, based on the workpiece placement sensing information, the first generation and sending module 200 generates and sends the workpiece surface cleanliness detection instruction and acquires the workpiece surface cleanliness information, based on the workpiece surface cleanliness information, the identification generation module 300 identifies and generates the workpiece feature information, the second generation and sending module 400 generates and sends the workpiece targeted penetration instruction and the developer spraying instruction, the generation module 500 generates personalized ultraviolet light pulse instructions, the acquisition and identification module 600 acquires and identifies the workpiece defect image, and the generation and output module 700 generates and outputs the workpiece visualization report.

[0129] like Figure 7 As shown, as another preferred embodiment of the present invention, the first generating and sending module 200 specifically includes:

[0130] The first retrieval unit 201 is used to retrieve the workpiece placement sensing information;

[0131] The first recognition unit 202 is used to recognize the maximum number of particles per unit area of ​​the workpiece;

[0132] The first judging unit 203 is used to judge whether the maximum number of particles per unit area of ​​the workpiece is less than a particle number threshold;

[0133] The first generating unit 204 is used to generate first-level qualified feedback information if the maximum number of particles per unit area of ​​the workpiece is less than the particle number threshold;

[0134] The second identification unit 205 is used to identify the characteristic peak intensity value of the oil stain on the workpiece;

[0135] The second judgment unit 206 is used to judge whether the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold;

[0136] The second generating unit 207 is used to generate secondary qualified feedback information if the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold;

[0137] A detection unit 208, used to detect whether the first-level qualified feedback information and the second-level qualified feedback information exist at the same time;

[0138] The third generating unit 209 is used to generate workpiece surface cleanliness qualification information if the first-level qualified feedback information and the second-level qualified feedback information exist at the same time.

[0139] When this embodiment is applied, the first retrieval unit 201 retrieves the workpiece placement sensing information, the first identification unit 202 identifies the maximum number of particles per unit area of ​​the workpiece, the first judgment unit 203 judges whether the maximum number of particles per unit area of ​​the workpiece is less than the particle number threshold, if the maximum number of particles per unit area of ​​the workpiece is less than the particle number threshold, the first generation unit 204 generates first-level qualified feedback information, the second identification unit 205 identifies the characteristic peak intensity value of the oil pollution of the workpiece, the second judgment unit 206 judges whether the characteristic peak intensity value of the oil pollution of the workpiece is less than the intensity threshold, if the characteristic peak intensity value of the oil pollution of the workpiece is less than the intensity threshold, the second generation unit 207 generates second-level qualified feedback information, the detection unit 208 detects whether the first-level qualified feedback information and the second-level qualified feedback information exist at the same time, if the first-level qualified feedback information and the second-level qualified feedback information exist at the same time, the third generation unit 209 generates workpiece surface cleanliness qualified information.

[0140] like Figure 8 As shown, as another preferred embodiment of the present invention, the second generating and sending module 400 specifically includes:

[0141] The second retrieval unit 401 is used to retrieve the workpiece surface cleanliness qualification information;

[0142] The acquisition and identification unit 402 is used to acquire and identify the spectral band of the workpiece;

[0143] The fourth generating unit 403 is used to generate workpiece material information;

[0144] A first acquisition unit 404 is used to acquire workpiece process information;

[0145] A fifth generating unit 405 is used to generate workpiece estimated defect type information;

[0146] The second acquisition unit 406 is used to acquire workpiece material information and estimated defect type information;

[0147] A matching unit 407, used for matching a penetrant temperature adjustment instruction and a penetration time control instruction;

[0148] The sixth generating unit 408 is used to generate a developer spraying countdown based on the penetration time.

[0149] When this embodiment is applied, the second retrieval unit 401 retrieves the qualified cleanliness information of the workpiece surface, the collection and identification unit 402 collects and identifies the spectral band of the workpiece, the fourth generation unit 403 generates the material information of the workpiece, the first acquisition unit 404 acquires the process information of the workpiece, the fifth generation unit 405 generates the estimated defect type information of the workpiece, the second acquisition unit 406 acquires the material information of the workpiece and the estimated defect type information, the matching unit 407 matches the penetrant temperature adjustment instruction and the penetration time control instruction, and based on the penetration time, the sixth generation unit 408 generates the developer spraying countdown.

[0150] like Fig. 9 As shown, as another preferred embodiment of the present invention, the generating module 500 specifically includes:

[0151] The first identification and judgment unit 501 is used to identify and judge the material information of the workpiece;

[0152] The seventh generating unit 502 is used to generate high-frequency pulsed ultraviolet light if the workpiece is made of metal;

[0153] The eighth generating unit 503 is used to generate low-frequency pulsed ultraviolet light if the workpiece is made of non-metallic insulating material:.

[0154] When this embodiment is applied, the first identification and judgment unit 501 identifies and judges the material information of the workpiece. If the workpiece is made of metal material, the seventh generation unit 502 generates high-frequency pulsed ultraviolet light. If the workpiece is made of non-metallic insulating material, the eighth generation unit 503 generates low-frequency pulsed ultraviolet light.

[0155] like Fig.10 As shown, as another preferred embodiment of the present invention, the generating module 500 specifically further includes:

[0156] The second identification and judgment unit 511 is used to identify and judge the estimated defect type information;

[0157] A ninth generating unit 512, configured to generate high-frequency pulsed purple light when the estimated defect type information is a large-area shallow crack;

[0158] The tenth generating unit 513 is used to generate low-frequency pulsed purple light when the estimated defect type information is a tiny gap or an internal crack.

[0159] When this embodiment is applied, the second identification and judgment unit 511 identifies and judges the estimated defect type information. When the estimated defect type information is a large-area shallow crack, the ninth generation unit 512 generates high-frequency pulsed purple light. When the estimated defect type information is a tiny gap or an internal crack, the tenth generation unit 513 generates a low-frequency pulsed purple light.

[0160] The above-mentioned embodiment of the present invention provides a method for upgrading and inspecting defects after fluorescent penetration, and provides a system for upgrading and inspecting defects after fluorescent penetration. The system is equipped with a robotic automated workpiece transfer device, a robotic spraying device and a high-precision visual image industrial acquisition camera. The robotic automated workpiece transfer device can directionally transfer the workpiece to be inspected to a designated position. A pressure sensor is installed at the designated position. Then, when the workpiece passes through the robotic automated workpiece transfer device to the designated position, the workpiece placement sensing information is obtained. First, a workpiece surface cleanliness detection instruction is generated and the workpiece surface cleanliness information is obtained. If there is residual oil or impurities on the workpiece surface, it is easy to cause misjudgment, cover up real defects or produce false positive results. When the workpiece surface cleanliness meets the requirements, based on the workpiece surface cleanliness information, the workpiece feature information is identified and generated. The feature information includes workpiece material information and estimated defect type information. According to different workpiece feature information, different workpiece targeted penetration instructions and developer spraying instructions are generated and sent. Different workpiece targeted penetration instructions perform penetrant penetration at different temperatures and different penetration times. When the penetrant penetrates After the developer spraying is completed, based on the developer spraying instruction sent, the robot spraying equipment is controlled to spray the developer on the designated position according to the preset spraying trajectory. After the developer spraying is completed, based on the workpiece feature information, the ultraviolet light pulse frequency is adjusted according to the different parts materials, the fluorescence excitation effect is optimized, the image contrast is improved, and the subsequent defect display is clearer. Then the high-precision visual image industrial acquisition camera collects the workpiece defect image with fluorescence display and transmits it to the image analysis software. The image recognition algorithm based on deep learning is used to identify the defect characteristics. The defect depth is measured in combination with a laser confocal microscope to accurately determine the defect nature, size, shape and depth. Finally, a workpiece visualization report is output to facilitate subsequent quality control and inquiry. The method and system are provided with a pre-cleanliness detection to effectively avoid misjudgment. According to different workpiece working conditions, targeted penetration and intelligent spraying are adapted to the workpiece characteristics. Ultraviolet light optimizes imaging to improve the accuracy of subsequent inspection images. At the same time, relying on high-precision sensors for rapid judgment, it eliminates manual misjudgment caused by visual fatigue or subjective negligence, comprehensively improves detection accuracy and efficiency, and further assists quality control.

[0161] In order to load the above-mentioned method and system and enable it to run smoothly, the system, in addition to the various modules mentioned above, may also include more or fewer components than described above, or a combination of certain components, or different components, for example, it may include input and output devices, network access devices, buses, processors and memories, etc.

[0162] The processor may be a central processing unit, or other general-purpose processors, digital signal processors, application-specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the system, and various interfaces and lines are used to connect various parts.

[0163] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0164] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0165] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for inspecting defects after fluorescence penetration, characterized in that: The method comprises: Obtain workpiece placement sensing information; Based on the workpiece placement sensing information, generate and send workpiece surface cleanliness detection instructions and obtain workpiece surface cleanliness information; Based on the workpiece surface cleanliness information, identify and generate workpiece feature information, generate and send workpiece targeted penetration instructions and developer spraying instructions; Generate personalized UV pulse instructions based on workpiece feature information; Collect and identify workpiece defect images, generate and output workpiece visualization reports.

2. The method for upgrading defect inspection after fluorescent penetration according to claim 1, characterized in that: The generating and sending of a workpiece surface cleanliness detection instruction and obtaining workpiece surface cleanliness information based on the workpiece placement sensing information specifically includes: Retrieve workpiece placement sensing information; Identify the maximum number of particles per unit area of ​​the workpiece; Determine whether the maximum number of particles per unit area of ​​the workpiece is less than the particle number threshold; If the maximum number of particles per unit area of ​​the workpiece is less than the particle number threshold, a first-level qualified feedback information is generated; Identify the characteristic peak intensity value of oil stain on workpiece; Determine whether the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold; If the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold, a second-level qualified feedback information is generated; Check whether the first-level qualified feedback information and the second-level qualified feedback information exist at the same time; If the first-level qualified feedback information and the second-level qualified feedback information exist at the same time, the workpiece surface cleanliness qualified information is generated.

3. The method for upgrading defect inspection after fluorescent penetration according to claim 1, characterized in that: The identifying and generating workpiece feature information based on the workpiece surface cleanliness information, and generating and sending the workpiece targeted penetration instruction and the developer spraying instruction specifically include: Retrieve workpiece surface cleanliness qualification information; Collect and identify the workpiece spectral bands to generate workpiece material information; Obtain workpiece process information and generate workpiece estimated defect type information; Obtain workpiece material information and estimated defect type information, and match penetrant temperature adjustment instructions and penetration time control instructions; Generates a countdown for developer spraying based on the penetration time.

4. The method for inspecting defects after fluorescent penetration according to claim 3, characterized in that: The generating of personalized ultraviolet light pulse instructions based on the workpiece feature information specifically includes: Identify and determine workpiece material information; If the workpiece is made of metal, high-frequency pulsed ultraviolet light is generated; If the workpiece is a non-metallic insulating material, low-frequency pulsed ultraviolet light is generated.

5. The method for upgrading defect inspection after fluorescent penetration according to claim 3, characterized in that: The step of generating a personalized ultraviolet light pulse instruction based on the workpiece feature information specifically includes: Identify and determine estimated defect type information; When the estimated defect type information is a large-area shallow crack, high-frequency pulsed purple light is generated; When the defect type information is estimated to be a tiny void or an internal crack, a low-frequency pulsed violet light is generated.

6. A fluorescent post-penetration defect upgrade inspection system, characterized in that: The method for upgrading defect inspection after fluorescent penetration according to any one of claims 1 to 5 is applied, wherein the system comprises: An acquisition module, used to acquire workpiece placement sensing information; A first generating and sending module is used to generate and send a workpiece surface cleanliness detection instruction and obtain workpiece surface cleanliness information based on the workpiece placement sensing information; An identification and generation module is used to identify and generate workpiece feature information based on the workpiece surface cleanliness information; The second generation and sending module generates and sends a workpiece targeted penetration instruction and a developer spraying instruction; A generation module, used for generating personalized ultraviolet light pulse instructions; An acquisition and recognition module is used to acquire and recognize workpiece defect images; Generate output module, used to generate and output artifact visualization report.

7. The fluorescent post-penetration defect upgrade inspection system according to claim 6, characterized in that: The first generating and sending module specifically includes: A first retrieval unit, used to retrieve workpiece placement sensing information; The first recognition unit is used to recognize the maximum number of particles per unit area of ​​the workpiece; A first judging unit is used to judge whether the maximum number of particles per unit area of ​​the workpiece is less than a particle number threshold; A first generating unit is used to generate first-level qualified feedback information if the maximum number of particles per unit area of ​​the workpiece is less than a particle number threshold; The second identification unit is used to identify the characteristic peak intensity value of the oil stain on the workpiece; The second judgment unit is used to judge whether the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold; The second generating unit is used to generate secondary qualified feedback information if the intensity value of the characteristic peak of the oil pollution on the workpiece is less than the intensity threshold; A detection unit, used to detect whether the first-level qualified feedback information and the second-level qualified feedback information exist at the same time; The third generating unit is used to generate workpiece surface cleanliness qualification information if the first-level qualified feedback information and the second-level qualified feedback information exist at the same time.

8. The fluorescent post-penetration defect upgrade inspection system according to claim 6, characterized in that: The second generating and sending module specifically includes: The second retrieval unit is used to retrieve the qualified cleanliness information of the workpiece surface; An acquisition and identification unit, used for acquiring and identifying the spectral band of the workpiece; A fourth generating unit, used for generating workpiece material information; A first acquisition unit, used for acquiring workpiece process information; A fifth generating unit, used to generate workpiece estimated defect type information; A second acquisition unit is used to acquire workpiece material information and estimated defect type information; A matching unit, used for matching penetrant temperature adjustment instructions and penetration time control instructions; The sixth generating unit is used to generate a developer spraying countdown based on the penetration time.

9. The fluorescent post-penetration defect upgrade inspection system according to claim 6, characterized in that: The generation module specifically includes: A first identification and judgment unit, used to identify and judge the material information of the workpiece; The seventh generating unit is used to generate high-frequency pulsed ultraviolet light if the workpiece is made of metal; The eighth generating unit is used to generate low-frequency pulsed ultraviolet light if the workpiece is made of non-metallic insulating material.

10. The fluorescent post-penetration defect upgrade inspection system according to claim 6, characterized in that: The generation module specifically includes: A second identification and judgment unit is used to identify and judge the estimated defect type information; A ninth generating unit, used for generating high-frequency pulsed purple light when the estimated defect type information is a large-area shallow crack; The tenth generation unit is used to generate low-frequency pulsed purple light when the estimated defect type information is a tiny gap or an internal crack.

Images