A piezoelectric ceramic sheet defect detection system and a detection method

Abstract

The application discloses a piezoelectric ceramic sheet defect detection system and a detection method, relates to the technical field of defect detection, and comprises a chromatic aberration judgment end, a brightness coordination end and an analysis and early warning end. The chromatic aberration judgment end is used for performing chromatic aberration detection on the printed pattern of the piezoelectric ceramic sheet in different regions in real time, and judging whether the printed pattern is abnormal. The brightness coordination end is used for continuously and coordinately judging whether the printed pattern at different positions and different moments is abnormal in combination with different light brightness parameters when the piezoelectric ceramic sheet defect detection is normal. The analysis and early warning end is used for analyzing the cause of the existence of the printing chromatic aberration according to the color when the piezoelectric ceramic sheet defect detection has the printing chromatic aberration. The piezoelectric ceramic sheet defect detection system and the detection method realize the timeliness and high efficiency of the piezoelectric ceramic sheet printed pattern defect detection, improve the accuracy of the piezoelectric ceramic sheet defect detection, and can timely perform cause early warning according to the printing chromatic aberration when the piezoelectric ceramic sheet defect detection is performed.

Description

Technical Field

[0001] This invention relates to the field of defect detection technology, and in particular to a defect detection system and method for piezoelectric ceramic sheets. Background Technology

[0002] Piezoelectric ceramic sheet defect detection refers to the process of non-destructively inspecting and evaluating the internal and external quality of piezoelectric ceramic sheets using a series of physical or chemical methods. The aim is to identify various defects that may affect their performance and reliability. Its core objective is to ensure that only piezoelectric ceramic sheets without defects or with defects within the allowable range can enter the subsequent manufacturing process of electronic components (such as filters, sensors, transducers, and actuators).

[0003] Currently, there are some shortcomings in the defect detection of piezoelectric ceramic sheets: 1. Surface defects of piezoelectric ceramic sheets include printed pattern defects. When performing defect detection on piezoelectric ceramic sheets, it is impossible to determine whether the printed pattern is abnormal based on the printing color difference in different areas of the piezoelectric ceramic sheet; 2. When detecting printed pattern defects on piezoelectric ceramic sheets in different areas, the influence of different lighting brightness will cause errors in the color comparison of the printed pattern, resulting in a large error in the detection of printed pattern defects and affecting the accuracy of piezoelectric ceramic sheet defect detection; 3. When printing color difference is found in the defect detection of piezoelectric ceramic sheets, it is impossible to provide timely warning based on the printing color difference, resulting in weak practicality and analysis effect of piezoelectric ceramic sheet defect detection.

[0004] Therefore, a defect detection system and method for piezoelectric ceramic sheets are proposed to solve the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide a defect detection system and method for piezoelectric ceramic sheets to solve the problems mentioned in the background above.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a piezoelectric ceramic sheet defect detection system, comprising a color difference judgment end, a brightness coordination end, and an analysis and early warning end;

[0007] The color difference judgment terminal is used to receive the printed pattern of the piezoelectric ceramic sheet in real time, divide the printed pattern into regions, set standard piezoelectric ceramic sheet parameters, perform color difference detection in real time based on the printed pattern of the piezoelectric ceramic sheet in different regions, judge whether the printed pattern is abnormal based on the printed color difference, and locate the position point of the printed pattern in real time when there is an abnormality, and mark it by sorting with Arabic numerals.

[0008] The brightness coordination terminal is used to adjust the illumination brightness parameters when the piezoelectric ceramic sheet defect detection is normal, and continuously coordinate to judge whether the printed pattern at different positions and times is abnormal by combining different illumination brightness parameters, so as to realize the coordinated detection of different light brightness, and to coordinate and warn whether the piezoelectric ceramic sheet defect detection is abnormal according to the cycle.

[0009] The analysis and early warning terminal is used to compare the colors of the locations where color differences occur in real time when printing color differences are detected in the piezoelectric ceramic sheet defect detection, analyze the cause of the printing color difference based on the color, and provide real-time early warning based on the cause whether the color difference has a performance impact.

[0010] The color difference judgment terminal includes a region division module, a standard parameter module, and a color difference judgment module;

[0011] The region division module includes a printed graphic unit and a region division unit;

[0012] The printed pattern unit is used to construct a defect detection model. The defect detection model includes standard printed patterns corresponding to different types of piezoelectric ceramic sheets, defect performance failures, defect performance impacts, and micro-defect matching compliance application standards. According to the piezoelectric ceramic sheet model, the printed patterns corresponding to different types of piezoelectric ceramic sheets are received in real time through a data receiver, and the printed pattern parameters of the piezoelectric ceramic sheets corresponding to different types are entered into the defect detection model. The printed pattern parameters include shape, color, pattern, and position points.

[0013] The region division unit is used to divide the piezoelectric ceramic sheet into several small regions of equal area.

[0014] The standard parameter module includes a standard parameter unit and a parameter threshold unit;

[0015] The standard parameter unit is used to set standard printing graphic parameters, which include the standard shape, standard color, standard pattern, and standard position points corresponding to different piezoelectric ceramic sheet models in the defect detection model.

[0016] The parameter threshold unit is used to set deviation thresholds for the standard shape, standard color, standard pattern, and standard position points corresponding to different piezoelectric ceramic sheet models in the defect detection model. The deviation thresholds are determined according to actual needs.

[0017] The color difference judgment module includes a printing color difference unit, a printing judgment unit, a positioning anomaly unit, and a sorting mark unit;

[0018] The printing color difference unit is used to detect color difference based on the printing patterns of piezoelectric ceramic sheets in different areas, and to obtain the printing color difference in different areas.

[0019] The printing judgment unit is used to calculate the difference between the printing color difference in different areas and the color difference threshold in the defect detection model. If the printing color difference is greater than the color difference threshold, the printing pattern in the corresponding area is judged to be abnormal, that is, the piezoelectric ceramic sheet defect detection is abnormal. If not, the printing pattern in the corresponding area is judged to be normal, that is, the piezoelectric ceramic sheet defect detection is normal.

[0020] The anomaly location unit is used to locate the location point where the printing pattern anomaly occurs in real time according to the corresponding area.

[0021] The sorting and marking unit is used to mark the locations where printing errors occur with red dots, and to sort the marked red dots by Arabic numerals from smallest to largest.

[0022] The brightness coordination terminal includes a brightness control module, a coordination detection module, and a periodic self-tracking module;

[0023] The brightness control module includes a region configuration unit and a brightness adjustment unit;

[0024] The area configuration unit is used to configure lighting equipment in different areas;

[0025] The brightness adjustment unit is used to adjust the brightness parameters of the lighting equipment in real time.

[0026] The collaborative detection module includes a detection positioning unit and a detection timing unit;

[0027] The detection and positioning unit is used to locate in real time based on the location points of the detection area;

[0028] The detection time unit is used to record the time in real time according to the detection area using a clock.

[0029] The periodic self-tracking module includes a periodic tracking unit, a periodic coordination unit, and a periodic early warning unit;

[0030] The periodic tracking unit is used to collect the printed pattern parameters detected at three different times under different illumination parameters when the defect detection of the piezoelectric ceramic sheet is normal. The printed pattern parameters include color, area, length and detection angle.

[0031] The periodic coordination unit is used to continuously coordinate and judge whether the printed graphic parameters at different positions and times are abnormal by combining different illumination parameters, and to calculate the consistency score of the printed graphic parameters under different illumination parameters.

[0032] The periodic early warning unit is used to set a consistency score threshold (the threshold is set according to actual needs, including 0-1). If the score exceeds the consistency score threshold, the piezoelectric ceramic defect detection is considered abnormal, and an abnormal alarm is immediately reported to the system. Otherwise, the piezoelectric ceramic defect detection is considered normal (detecting whether the printed patterns at the same location at different times are abnormal, thus determining whether the printed patterns at different locations at different times are abnormal).

[0033] The analysis and early warning terminal includes a data receiving module, a color difference comparison module, a color difference analysis module, and a judgment and early warning module;

[0034] The data receiving module is used to receive the defect detection and judgment results of the piezoelectric ceramic sheet in real time through the data receiver.

[0035] The color difference comparison module includes a multi-region comparison unit. When a printing color difference is detected in the piezoelectric ceramic sheet defect detection, the multi-region comparison unit is used to collect abnormal location points of the printed pattern color difference in real time through a vision camera, generate an image, and obtain the color of the abnormal location point of the printed pattern by comparing it with the color library. The colors include yellow, dark, white and gray.

[0036] The color difference analysis module includes a multi-region analysis unit, which is used to collect the color of abnormal locations in the printed patterns of different regions of the piezoelectric ceramic sheet. The reasons for the printing color difference are analyzed based on the color analysis as follows:

[0037] Yellow indicates insufficient sintering or poor storage environment, resulting in oxidation of the silver surface.

[0038] Dark color indicates incomplete debinding during sintering, resulting in carbonization of organic matter;

[0039] White indicates that the surface is contaminated with dust, other metal particles, or chemical impurities during the printing or sintering process;

[0040] Gray indicates the initial stage of silver migration in a humid environment, during which silver ions begin to migrate and be reduced.

[0041] If the colors of the abnormal locations in the three areas of the printed pattern are not the same, it indicates that the printed pattern color is not uniform. This indicates that the printing pressure or the fluidity of the paste is poor, the paste is not mixed evenly, and the silver powder, glass powder and organic carrier in the paste are not fully dispersed.

[0042] The judgment and early warning module includes a standard-reaching judgment unit and an impact analysis and early warning unit;

[0043] The compliance judgment unit is used to judge whether the piezoelectric ceramic sheet meets the standard in real time based on the cause of the printing color difference. If the defect detection result of the piezoelectric ceramic sheet is normal, the product is judged to meet the standard. If the defect detection result of the piezoelectric ceramic sheet is abnormal and the color of the abnormal position point of the printed pattern includes any two of yellow, dark, white and gray, the product is judged to be non-compliant and the system is reported to provide feedback for manual intervention.

[0044] The analysis and early warning unit is used to provide early warning based on the cause of whether the color difference in the printed pattern of the piezoelectric ceramic sheet affects its performance. The specific method is as follows:

[0045] If the printed pattern of the piezoelectric ceramic sheet shows abnormal color, such as yellow, it indicates that the conductivity of silver oxide in the piezoelectric ceramic sheet is lower than that of pure silver, resulting in a decrease in conductivity.

[0046] If it is dark, it indicates that the adhesion of the piezoelectric ceramic sheet has deteriorated, that is, organic residue will weaken the bonding force between the electrode and the ceramic.

[0047] If it is white, it indicates that the insulation of the piezoelectric ceramic sheet has decreased;

[0048] If it is gray, it indicates that the device inside the piezoelectric ceramic sheet has short-circuited and failed.

[0049] If the colors of the abnormal locations in the printed patterns within the three regions are all different, it indicates that the electrode resistance of the piezoelectric ceramic sheet is uneven, which makes it prone to overheating and aging, affecting high-frequency performance.

[0050] A method for detecting defects in piezoelectric ceramic sheets includes the following steps:

[0051] Step 1: Configure the IP address information of the remote control area server for defect detection;

[0052] Step 2: Enter the color difference judgment end, divide the printed pattern on the piezoelectric ceramic sheet into areas, set the standard piezoelectric ceramic sheet parameters, and judge whether the printed pattern is abnormal in real time based on the printing color difference of the piezoelectric ceramic sheets in different areas. If abnormal, locate the piezoelectric ceramic sheet with abnormal printing pattern in real time, sort and display the position points, and enter the analysis and warning end.

[0053] Step 3: If normal, proceed to the brightness coordination end. The brightness of the detection area is adjusted in real time. When the color difference of the piezoelectric ceramic sheet printing is normal, adjust the illumination brightness parameter and continuously coordinate the detection error at different positions and times to make a second judgment on whether the printed pattern is abnormal.

[0054] Step 4: Enter the analysis and early warning terminal. When there is an abnormal color difference in the printing of the piezoelectric ceramic sheet, compare the color difference...

[0055] Analyze the causes of printing color differences, and based on the causes, determine in real time whether the piezoelectric ceramic sheet meets the standards and provide early warnings of the impact on the product.

[0056] The present invention has the following beneficial effects:

[0057] 1. In this invention, by setting a color difference judgment end, during the defect detection operation of piezoelectric ceramic sheets, the printed pattern of the piezoelectric ceramic sheet is received in real time by a data receiver, and color difference detection is performed in real time based on the printed pattern of the piezoelectric ceramic sheet in different areas to determine whether the printed pattern is abnormal. This enables the determination of whether the printed pattern is abnormal based on the printing color difference of the piezoelectric ceramic sheet in different areas during defect detection of piezoelectric ceramic sheets, and to locate the position point of the printed pattern in real time when an abnormality occurs. By using Arabic numeral sorting marks, the timeliness and efficiency of defect detection of printed pattern of piezoelectric ceramic sheets are achieved.

[0058] 2. In this invention, by setting a brightness coordination end, when performing piezoelectric ceramic sheet defect detection, if the piezoelectric ceramic sheet defect detection is normal, the invention continuously coordinates and judges whether the printed pattern at different positions and times is abnormal by combining different illumination brightness parameters. This enables the detection of printed pattern defects on the piezoelectric ceramic sheet in different regions, and can periodically coordinate and warn whether the piezoelectric ceramic sheet defect detection is abnormal. This reduces the probability of color difference errors in the comparison of printed patterns during piezoelectric ceramic sheet defect detection, and improves the accuracy of piezoelectric ceramic sheet defect detection.

[0059] 3. In this invention, by setting up an analysis and early warning terminal, when a printing color difference is detected during the piezoelectric ceramic sheet defect detection operation, the color of the location of the color difference is compared in real time. The cause of the printing color difference is analyzed based on the color, and an early warning is issued based on the cause to indicate whether the color difference has a performance impact. This enables the system to issue timely warnings based on the printing color difference during piezoelectric ceramic sheet defect detection, increasing the practicality of piezoelectric ceramic sheet defect detection and improving the strength of the analysis effect. Attached Figure Description

[0060] Figure 1 This is a schematic diagram of the system architecture of a piezoelectric ceramic sheet defect detection system and detection method according to the present invention;

[0061] Figure 2 This is a schematic diagram of the color difference judgment end of the piezoelectric ceramic sheet defect detection system and detection method of the present invention;

[0062] Figure 3 This is a schematic diagram of the brightness coordination end of the piezoelectric ceramic sheet defect detection system and detection method of the present invention;

[0063] Figure 4 This is a schematic diagram of the analysis and early warning terminal of the piezoelectric ceramic sheet defect detection system and detection method of the present invention;

[0064] Figure 5 These are schematic diagrams of various printed patterns on piezoelectric ceramic sheets. Detailed Implementation

[0065] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0066] Example 1, please refer to Figures 1-2 As shown: A defect detection system and method for piezoelectric ceramic sheets, including a color difference judgment end, a brightness coordination end, and an analysis and early warning end;

[0067] The color difference judgment end is used to receive the printed pattern of the piezoelectric ceramic sheet in real time, divide the printed pattern into regions, set the standard piezoelectric ceramic sheet parameters, and perform color difference detection in real time based on the printed pattern of the piezoelectric ceramic sheet in different regions. It judges whether the printed pattern is abnormal based on the printed color difference, and locates the position point of the printed pattern in real time when there is an abnormality, and marks it by sorting with Arabic numerals.

[0068] The brightness coordination end is used to adjust the illumination brightness parameters when the piezoelectric ceramic sheet defect detection is normal. It continuously coordinates the judgment of whether the printed pattern at different positions and times is abnormal by combining different illumination brightness parameters, so as to realize the coordinated detection of different light brightness and the coordinated early warning of whether the piezoelectric ceramic sheet defect detection is abnormal on a periodic basis.

[0069] The analysis and early warning terminal is used to compare the colors of the locations where color differences occur in real time when defects are detected in piezoelectric ceramic sheets. Based on the color analysis, the cause of the color difference is determined, and an early warning is issued in real time to indicate whether the color difference will affect performance.

[0070] The color difference judgment module includes a region division module, a standard parameter module, and a color difference judgment module.

[0071] The region division module includes printed graphic units and region division units;

[0072] The printed pattern unit is used to build a defect detection model. The defect detection model includes standard printed patterns corresponding to different models of piezoelectric ceramic sheets, defect performance failures, defect performance impacts, and micro-defect matching compliance application standards. According to the piezoelectric ceramic sheet model, the printed patterns corresponding to different models of piezoelectric ceramic sheets are received in real time through the data receiver, and the printed pattern parameters of the piezoelectric ceramic sheets corresponding to different models are entered into the defect detection model. The printed pattern parameters include shape, color, pattern, and position points.

[0073] The region division unit is used to divide the piezoelectric ceramic sheet into several small regions of equal area.

[0074] The standard parameter module includes standard parameter units and parameter threshold units;

[0075] The standard parameter unit is used to set standard printing graphic parameters, which include the standard shape, standard color, standard pattern, and standard position points corresponding to different piezoelectric ceramic sheet models in the defect detection model.

[0076] The parameter threshold unit is used to set deviation thresholds for the standard shape, standard color, standard pattern, and standard position points corresponding to different piezoelectric ceramic sheet models in the defect detection model. The deviation thresholds are determined according to actual needs (color deviation should be ≤1.5, shape deviation including thickness deviation should be controlled within ≤±2μm, diameter deviation should be controlled within ≤±0.1mm, position point deviation includes 0.05-0.2mm, where 0.05mm is for high-performance devices and 0.2mm is for ordinary devices, and the pattern deviation threshold can be set to the defect area not exceeding 0.5% of the total electrode area, including burr height / width ≤5μm).

[0077] The color difference judgment module includes a printing color difference unit, a printing judgment unit, a positioning anomaly unit, and a sorting mark unit;

[0078] The printing color difference unit is used to detect color differences based on the printed patterns of piezoelectric ceramic sheets in different areas, and to obtain the printing color difference in different areas. The calculation formula for the printing color difference in different areas is as follows:

[0079] The calculation formula is as follows: ;

[0080] in, This indicates the color difference between the standard color and the real-time color captured by the visual camera. The coordinates of the light source representing the standard color. The coordinates of the light source representing the real-time color. This indicates the brightness difference between different areas (the different areas here refer to the multiple detection areas achieved when performing printing color difference detection at multiple locations);

[0081] The printing judgment unit is used to calculate the difference between the printing color difference in different areas and the color difference threshold in the defect detection model. If the printing color difference is greater than the color difference threshold, the printing pattern in the corresponding area is judged to be abnormal, that is, the piezoelectric ceramic sheet defect detection is abnormal. Otherwise, the printing pattern in the corresponding area is judged to be normal, that is, the piezoelectric ceramic sheet defect detection is normal.

[0082] The anomaly location unit is used to locate the position point where the printing pattern anomaly occurs in real time according to the corresponding area.

[0083] The sorting and marking unit is used to mark the locations where printing errors occur with red dots, and to sort the marked red dots by Arabic numerals from smallest to largest (this is the prior art).

[0084] By performing real-time color difference detection on the printed patterns of piezoelectric ceramic sheets in different areas, calculating the printing color difference in different areas in real time, and judging whether the printed pattern is abnormal based on the printing color difference, it is possible to judge whether the printed pattern is abnormal in real time when performing defect detection on piezoelectric ceramic sheets, and locate the location of the printed pattern in real time when an abnormality occurs, thus achieving timeliness and efficiency in detecting defects in the printed patterns of piezoelectric ceramic sheets.

[0085] Example 2, please refer to Figure 3 As shown: Based on Embodiment 1, the brightness coordination terminal includes a brightness control module, a coordination detection module, and a periodic self-tracking module;

[0086] The brightness control module includes a region configuration unit and a brightness adjustment unit;

[0087] The zone configuration unit is used to configure lighting equipment in different zones;

[0088] The brightness adjustment unit is used to adjust the brightness parameters in real time according to the lighting equipment;

[0089] The collaborative detection module includes a detection positioning unit and a detection timing unit;

[0090] The detection and positioning unit is used to locate itself in real time based on the location points of the detection area;

[0091] The detection time unit is used to record the time in real time according to the detection area using a clock.

[0092] The cycle self-tracking module includes a cycle tracking unit, a cycle coordination unit, and a cycle early warning unit;

[0093] The periodic tracking unit is used to collect the printed pattern parameters detected at three different times under different illumination parameters when the defect detection of the piezoelectric ceramic sheet is normal. The printed pattern parameters include color, area, length and detection angle.

[0094] The periodic coordination unit is used to continuously coordinate and judge whether the printed pattern parameters at different positions and times are abnormal by combining different illumination parameters, and calculate the consistency score of printed pattern parameters under different illumination parameters. The formula is as follows: ;

[0095] in, This represents the score indicating the consistency of printed graphic parameters under different illumination parameters. This represents the coordinates of the same point on a printed graphic under different illumination parameters and at different times. This represents the total number of detections at the same location. Indicates the first Printing graphic parameters at a given location point under various illumination parameters. Indicates the first Printing graphic parameters at a given location point under various illumination parameters. This refers to comparing the printed graphic parameters obtained by selecting any two different illumination parameters from three illumination parameters;

[0096] The periodic warning unit is used to set a consistency score threshold (the threshold is set according to actual needs, including 0-1). If the score exceeds the consistency score threshold, the piezoelectric ceramic defect detection is considered abnormal, and an abnormal alarm is immediately reported to the system. Otherwise, the piezoelectric ceramic defect detection is considered normal (detecting whether the printed patterns at the same location at different times are abnormal, thus determining whether the printed patterns at different locations at different times are abnormal).

[0097] By combining different illumination parameters to continuously and collaboratively judge whether the printed pattern is abnormal at different positions and times, when detecting printed pattern defects on piezoelectric ceramic sheets in different regions, it can achieve collaborative detection of different light brightness and periodically provide early warning of whether the piezoelectric ceramic sheet defect detection is abnormal, thereby reducing the probability of color difference error when comparing printed patterns during piezoelectric ceramic sheet defect detection.

[0098] Example 3, please refer to Figures 4-5 As shown: Based on Embodiment 1, the analysis and early warning terminal includes a data receiving module, a color difference comparison module, a color difference analysis module, and a judgment and early warning module;

[0099] The data receiving module is used to receive the defect detection and judgment results of the piezoelectric ceramic sheet in real time through the data receiver;

[0100] The color difference comparison module includes a multi-region comparison unit. When a printing color difference is detected in the piezoelectric ceramic sheet defect detection, the multi-region comparison unit uses a vision camera to collect abnormal location points where the printing pattern color difference occurs in real time, generates an image, and obtains the color of the abnormal location point of the printing pattern by comparing it with the color library (the color library collects the printing pattern colors corresponding to different defects of piezoelectric ceramic sheets of different models, and stores the color affecting the performance of piezoelectric ceramic sheets in the defect construction model through a data logger. When comparing with the color library, the collected color is compared with the color in the color library). The colors include yellow, dark, white, and gray.

[0101] The color difference analysis module includes a multi-region analysis unit, which is used to collect the color of abnormal locations in the printed pattern of different areas of the piezoelectric ceramic sheet. The reasons for the printing color difference are analyzed as follows (the reasons are initially recorded in the defect detection model, which can be adjusted according to actual needs):

[0102] Yellow indicates insufficient sintering or poor storage environment, resulting in oxidation of the silver surface.

[0103] Dark color indicates incomplete debinding during sintering, resulting in carbonization of organic matter;

[0104] White indicates that the surface is contaminated with dust, other metal particles, or chemical impurities during the printing or sintering process;

[0105] Gray indicates the initial stage of silver migration in a humid environment, during which silver ions begin to migrate and be reduced.

[0106] If the colors of the abnormal locations in the three areas of the printed pattern are not the same, it indicates that the printed pattern color is not uniform. This indicates that the printing pressure or the fluidity of the paste is poor, the paste is not mixed evenly, and the silver powder, glass powder and organic carrier in the paste are not fully dispersed.

[0107] Color analysis is as follows:

[0108] Yellow: Mainly due to oxidation (Ag→Ag2O), spectral characteristics: [XPS: Ag + XRD: Ag2O, Reflectance Spectrum: Blue Light Absorption;

[0109] Dark color: The main cause is carbonization (C residue), spectral characteristics: [Raman: D / G peak, XPS: CC, FTIR: CH], performance impact: decreased adhesion;

[0110] White: The main cause is contamination (SiO2, etc.), spectral characteristics: [EDS: anomalous element, high reflectivity], performance impact: local insulation failure;

[0111] Gray: Mainly due to silver migration; spectral characteristics: [nano-Ag particles, dendritic structure]; threshold: pattern fractal dimension > 1.5; scalability; performance impact: insulation resistance index decreases.

[0112] Uneven color: The main cause is the dispersion of the slurry. Spectral characteristics: [uneven component distribution, texture statistics].

[0113] The judgment and early warning module includes a standard-reaching judgment unit and an impact analysis and early warning unit;

[0114] The compliance judgment unit is used to judge whether the piezoelectric ceramic sheet meets the standard in real time based on the cause of the printing color difference. If the defect detection result of the piezoelectric ceramic sheet is normal, the product is judged to meet the standard. If the defect detection result of the piezoelectric ceramic sheet is abnormal and the color of the abnormal position point of the printed pattern includes any two of yellow, dark, white and gray, the product is judged to be non-compliant and the system is reported for manual intervention.

[0115] The analysis and early warning unit is used to provide early warnings based on the cause of color differences in the printed patterns of piezoelectric ceramic sheets to determine whether they affect performance. The specific method is as follows:

[0116] If the printed pattern of the piezoelectric ceramic sheet shows abnormal color, such as yellow, it indicates that the conductivity of silver oxide in the piezoelectric ceramic sheet is lower than that of pure silver, resulting in a decrease in conductivity.

[0117] If it is dark, it indicates that the adhesion of the piezoelectric ceramic sheet has deteriorated, that is, organic residue will weaken the bonding force between the electrode and the ceramic.

[0118] If it is white, it indicates that the insulation of the piezoelectric ceramic sheet has decreased;

[0119] If it is gray, it indicates that the device inside the piezoelectric ceramic sheet has short-circuited and failed.

[0120] If the colors of the abnormal locations in the printed pattern are all different in the three regions, it indicates that the electrode resistance of the piezoelectric ceramic sheet is uneven, which makes it prone to heat generation and aging, affecting high-frequency performance (the cause analysis and early warning performance impact are initially recorded in the defect detection model. The defect detection model can be adjusted according to actual needs. The defect detection model is constructed using a visual Transformer or a high-performance CNN (such as ConvNeXt). The construction method is as follows).

[0121] When a printing color difference is detected in the piezoelectric ceramic sheet defect detection, the color of the point where the color difference occurs is compared in real time. The cause of the printing color difference is analyzed based on the color, and the piezoelectric ceramic sheet is judged in real time based on the cause to determine whether it meets the standard. The system also provides real-time warnings on whether the color difference has a performance impact based on the cause. This allows the system to provide timely warnings based on the cause of the printing color difference when detecting defects in piezoelectric ceramic sheets, thus increasing the practicality of piezoelectric ceramic sheet defect detection.

[0122] In this invention, the color difference judgment end, brightness coordination end, and analysis and early warning end are service processor control ports. In specific applications, the service processor is divided into three control ports within the system: the color difference judgment end, the brightness coordination end, and the analysis and early warning end. A piezoelectric ceramic sheet defect detection system and method are described. During operation, firstly, the IP address information of the remote control area server for defect detection is configured. Then, the color difference judgment end divides the printed pattern on the piezoelectric ceramic sheet into regions, sets standard piezoelectric ceramic sheet parameters, and judges whether the printed pattern is abnormal based on the color difference of the piezoelectric ceramic sheet in different regions. If abnormal, the location points of the piezoelectric ceramic sheet with the abnormal printed pattern are located and displayed in a sorted manner. Next, the analysis and early warning end receives the printed pattern of the piezoelectric ceramic sheet in real time through a data receiver during the piezoelectric ceramic sheet defect detection operation. The printed pattern is divided into regions of equal area, standard piezoelectric ceramic sheet parameters are set, and threshold values ​​are set for the parameters. Color difference detection is performed in real time based on the printed pattern of the piezoelectric ceramic sheet in different regions, and the printing color difference of different regions is calculated in real time. The abnormality of the printed pattern is judged based on the printing color difference, thus ensuring that the piezoelectric ceramic sheet defect detection system and method are effective. When performing defect detection on piezoelectric ceramic sheets, the system can determine whether the printed pattern is abnormal in real time based on the printing color difference of different areas of the piezoelectric ceramic sheet. If an abnormality is detected, the system can locate the point where the printed pattern appears in real time and use Arabic numerals to sort and mark it, achieving timeliness and efficiency in detecting defects in the printed pattern of the piezoelectric ceramic sheet. If the pattern is normal, the system enters the brightness coordination stage, adjusting the brightness of the detection area in real time. When the printing color difference of the piezoelectric ceramic sheet is normal, the system adjusts the illumination parameters and continuously calculates the detection error based on different positions and times, making a second judgment on whether the printed pattern is abnormal. During the piezoelectric ceramic sheet defect detection operation, when the defect detection is normal, the system configures lighting equipment in different areas and adjusts the illumination parameters in real time based on the lighting equipment. It continuously and collaboratively judges whether the printed pattern is abnormal at different positions and times based on different illumination parameters. This enables coordinated detection of printed pattern defects on piezoelectric ceramic sheets in different areas, achieving coordinated detection of different light brightness levels and periodic coordinated warnings for abnormal defects in piezoelectric ceramic sheet defect detection. This reduces the probability of color difference errors during printing pattern comparison during piezoelectric ceramic sheet defect detection and improves the accuracy of piezoelectric ceramic sheet defect detection.Upon entering the analysis and early warning stage, when abnormal color differences occur in the printing of piezoelectric ceramic sheets, the cause of the color difference is analyzed by comparing the color differences. Based on the cause, the system determines in real time whether the piezoelectric ceramic sheet meets the standards and issues an early warning regarding the impact on the product. During the piezoelectric ceramic sheet defect detection operation, the system receives the defect detection results in real time through the data receiver. When a color difference is detected in the piezoelectric ceramic sheet defect detection, the system compares the colors at the location of the color difference in real time, analyzes the cause of the color difference, and determines in real time whether the piezoelectric ceramic sheet meets the standards. The system also issues an early warning in real time regarding whether the color difference has a performance impact. This allows the system to issue timely warnings based on the cause of the color difference during piezoelectric ceramic sheet defect detection, increasing the practicality of piezoelectric ceramic sheet defect detection and improving the strength of the analysis effect. Figure 5 The invention demonstrates printed patterns of piezoelectric ceramic sheets of different shapes and sizes, and uses the printed patterns for detection and analysis to achieve defect detection of the piezoelectric ceramic sheets.

[0123] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A piezoelectric ceramic sheet defect detection system, characterized by, The system includes a color difference judgment terminal, a brightness coordination terminal, and an analysis and early warning terminal; The color difference judgment terminal is used to receive the printed pattern of the piezoelectric ceramic sheet in real time, divide the printed pattern into regions, set standard piezoelectric ceramic sheet parameters, perform color difference detection in real time based on the printed pattern of the piezoelectric ceramic sheet in different regions, judge whether the printed pattern is abnormal based on the printed color difference, and locate the position point of the printed pattern in real time when there is an abnormality, and mark it by sorting with Arabic numerals. The brightness coordination terminal is used to adjust the illumination brightness parameters when the piezoelectric ceramic sheet defect detection is normal, and continuously coordinate to judge whether the printed pattern at different positions and times is abnormal by combining different illumination brightness parameters, so as to realize the coordinated detection of different light brightness, and to coordinate and warn whether the piezoelectric ceramic sheet defect detection is abnormal according to the cycle. The analysis and early warning terminal is used to compare the color of the location of the color difference in real time when the defect detection of the piezoelectric ceramic sheet shows a printing color difference, analyze the cause of the printing color difference based on the color, and provide an early warning in real time based on the cause whether the color difference has a performance impact. The color difference judgment terminal includes a region division module, a standard parameter module, and a color difference judgment module; The region division module includes a printed graphic unit and a region division unit; The printed pattern unit is used to construct a defect detection model. The defect detection model includes standard printed patterns corresponding to different types of piezoelectric ceramic sheets, defect performance failures, defect performance impacts, and micro-defect matching compliance application standards. According to the piezoelectric ceramic sheet model, the printed patterns corresponding to different types of piezoelectric ceramic sheets are received in real time through a data receiver, and the printed pattern parameters of the piezoelectric ceramic sheets corresponding to different types are entered into the defect detection model. The printed pattern parameters include shape, color, pattern, and position points. The region division unit is used to divide the piezoelectric ceramic sheet into several small regions of equal area. The standard parameter module includes a standard parameter unit and a parameter threshold unit; The standard parameter unit is used to set standard printing graphic parameters, which include the standard shape, standard color, standard pattern, and standard position points corresponding to different piezoelectric ceramic sheet models in the defect detection model. The parameter threshold unit is used to set deviation thresholds for the standard shape, standard color, standard pattern, and standard position points corresponding to different piezoelectric ceramic sheet models in the defect detection model. The deviation thresholds are determined according to actual needs. The color difference judgment module includes a printing color difference unit, a printing judgment unit, a positioning anomaly unit, and a sorting mark unit; The printing color difference unit is used to detect color difference based on the printing patterns of piezoelectric ceramic sheets in different areas, and to obtain the printing color difference in different areas. The printing judgment unit is used to calculate the difference between the printing color difference in different areas and the color difference threshold in the defect detection model. If the printing color difference is greater than the color difference threshold, the printing pattern in the corresponding area is judged to be abnormal, that is, the piezoelectric ceramic sheet defect detection is abnormal. If not, the printing pattern in the corresponding area is judged to be normal, that is, the piezoelectric ceramic sheet defect detection is normal. The anomaly location unit is used to locate the location point where the printing pattern anomaly occurs in real time according to the corresponding area. The sorting and marking unit is used to mark the locations where printing errors occur with red dots, and to sort the marked red dots by Arabic numerals from smallest to largest. The brightness coordination terminal includes a brightness control module, a coordination detection module, and a periodic self-tracking module; The brightness control module includes a region configuration unit and a brightness adjustment unit; The area configuration unit is used to configure lighting equipment in different areas; The brightness adjustment unit is used to adjust the brightness parameters of the lighting equipment in real time. The collaborative detection module includes a detection positioning unit and a detection timing unit; The detection and positioning unit is used to locate in real time based on the location points of the detection area; The detection time unit is used to record the time in real time according to the detection area using a clock. The periodic self-tracking module includes a periodic tracking unit, a periodic coordination unit, and a periodic early warning unit; The periodic tracking unit is used to collect the printed pattern parameters detected at three different times under different illumination parameters when the defect detection of the piezoelectric ceramic sheet is normal. The printed pattern parameters include color, area, length and detection angle. The periodic coordination unit is used to continuously coordinate and judge whether the printed pattern parameters at different positions and times are abnormal by combining different illumination parameters, and calculate the consistency score of the printed pattern parameters under different illumination parameters. The formula is as follows: ; in, This represents the score indicating the consistency of printed graphic parameters under different illumination parameters. This represents the coordinates of the same point on a printed graphic under different illumination parameters and at different times. This represents the total number of detections at the same location. Indicates the first Printing graphic parameters at a given location point under various illumination parameters. Indicates the first Printing graphic parameters at a given location point under various illumination parameters. This refers to comparing the printed graphic parameters obtained by selecting any two different illumination parameters from three illumination parameters; The periodic early warning unit is used to set a consistency score threshold. If the score exceeds the consistency score threshold, the piezoelectric ceramic defect detection is considered abnormal, and an abnormal alarm is immediately reported to the system. Otherwise, the piezoelectric ceramic defect detection is considered normal.

2. The system of claim 1, wherein: The analysis and early warning terminal includes a data receiving module, a color difference comparison module, a color difference analysis module, and a judgment and early warning module; The data receiving module is used to receive the defect detection and judgment results of the piezoelectric ceramic sheet in real time through the data receiver. The color difference comparison module includes a multi-region comparison unit. When a printing color difference is detected in the piezoelectric ceramic sheet defect detection, the multi-region comparison unit is used to collect abnormal location points of the printed pattern color difference in real time through a vision camera, generate an image, and obtain the color of the abnormal location point of the printed pattern by comparing it with the color library. The colors include yellow, dark, white and gray.

3. The system of claim 2, wherein: The color difference analysis module includes a multi-region analysis unit, which is used to collect the color of abnormal locations in the printed pattern of different regions of the piezoelectric ceramic sheet. The reasons for the printing color difference are analyzed based on the color analysis as follows: Yellow indicates insufficient sintering or poor storage environment, resulting in oxidation of the silver surface. Dark color indicates incomplete debinding during sintering, resulting in carbonization of organic matter; White indicates that the surface is contaminated with dust, other metal particles, or chemical impurities during the printing or sintering process; Gray indicates the initial stage of silver migration in a humid environment, during which silver ions begin to migrate and be reduced. If the colors of the abnormal locations in the three areas of the printed pattern are not the same, it indicates that the printed pattern color is uneven. This indicates that the printing pressure or the fluidity of the paste was poor, and the paste was not mixed evenly, resulting in the silver powder, glass powder and organic carrier in the paste not being fully dispersed.

4. The system of claim 3, wherein: The judgment and early warning module includes a standard-reaching judgment unit and an impact analysis and early warning unit; The compliance judgment unit is used to judge whether the piezoelectric ceramic sheet meets the standard in real time based on the cause of the printing color difference. If the defect detection result of the piezoelectric ceramic sheet is normal, the product is judged to meet the standard. If the defect detection result of the piezoelectric ceramic sheet is abnormal and the color of the abnormal position point of the printed pattern includes any two of yellow, dark, white and gray, the product is judged to be non-compliant and the system is reported to provide feedback for manual intervention. The analysis and early warning unit is used to provide early warning based on the cause of whether the color difference in the printed pattern of the piezoelectric ceramic sheet affects its performance. The specific method is as follows: If the printed pattern of the piezoelectric ceramic sheet shows abnormal color, such as yellow, it indicates that the conductivity of silver oxide in the piezoelectric ceramic sheet is lower than that of pure silver, resulting in a decrease in conductivity. If it is dark, it indicates that the adhesion of the piezoelectric ceramic sheet has deteriorated, that is, organic residue will weaken the bonding force between the electrode and the ceramic. If it is white, it indicates that the insulation of the piezoelectric ceramic sheet has decreased; If it is gray, it indicates that the device inside the piezoelectric ceramic sheet has short-circuited and failed. If the colors of the abnormal locations in the printed patterns within the three regions are all different, it indicates that the electrode resistance of the piezoelectric ceramic sheet is uneven, which can easily lead to overheating and aging, affecting high-frequency performance.

5. A method for detecting defects in piezoelectric ceramic sheets, implemented using the piezoelectric ceramic sheet defect detection system described in any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Configure the IP address information of the remote control area server for defect detection; Step 2: Enter the color difference judgment end, divide the printed pattern on the piezoelectric ceramic sheet into areas, set the standard piezoelectric ceramic sheet parameters, and judge whether the printed pattern is abnormal in real time based on the printing color difference of the piezoelectric ceramic sheets in different areas. If abnormal, locate the piezoelectric ceramic sheet with abnormal printing pattern in real time, sort and display the position points, and enter the analysis and warning end. Step 3: If normal, proceed to the brightness coordination end. The brightness of the detection area is adjusted in real time. When the color difference of the piezoelectric ceramic sheet printing is normal, adjust the illumination brightness parameter and continuously coordinate the detection error at different positions and times to make a second judgment on whether the printed pattern is abnormal. Step 4: Enter the analysis and early warning terminal. When the printing color difference of the piezoelectric ceramic sheet is abnormal, the cause of the printing color difference is analyzed by comparing the color difference. Based on the cause, it is judged in real time whether the piezoelectric ceramic sheet meets the standard and the impact on the product is warned.

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