Material electromagnetic parameter testing system and testing method

Abstract

The application discloses a material electromagnetic parameter testing system and a testing method. The system comprises a product conveying device, a material testing device and a control device. The product conveying device comprises a first conveying module and a second conveying module. The first conveying module sucks material plates from a feeding area and places the material plates on a predetermined detection position of the second conveying module. The second conveying module is arranged at the center of the material testing device and is used for adjusting the material plates placed on the predetermined detection position to a detection posture and moving the material plates to the material testing device for electromagnetic testing. The material testing device comprises multiple pairs of testing antennas with different testing frequencies. The control device is used for controlling the product conveying device to convey the material plates and controlling the material testing device to test the material plates to obtain electromagnetic parameters of the material plates. The application can realize full-automatic electromagnetic parameter testing and improve testing efficiency and testing precision.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic parameter testing technology for materials, specifically relating to a material electromagnetic parameter testing system and testing method. Background Technology

[0002] With the rapid development of modern electronic information, aerospace, and military stealth technologies, the electromagnetic properties of materials have become one of the core factors affecting system performance. Accurately obtaining parameters such as the dielectric constant and permeability of materials in the microwave frequency band is of great significance for material design, performance evaluation, and product optimization.

[0003] Currently, methods for testing the electromagnetic parameters of materials mainly include the resonant cavity method, transmission line method, coaxial probe method, and free space method. Among them, the free space method has gradually become the mainstream testing method due to its advantages such as non-contact, non-destructive nature, applicability to large-area flat samples, and wide measurable frequency bandwidth. However, existing free space method testing systems still suffer from low automation and relatively low testing accuracy. Summary of the Invention

[0004] One objective of this application is to provide an automated testing system for electromagnetic parameters of materials, enabling fully automated testing of electromagnetic parameters such as complex permittivity and complex permeability of material plates. Another objective of this application is to provide a testing method using this material electromagnetic parameter testing system.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application discloses a material electromagnetic parameter testing system, including a product conveying device, a material testing device, and a control device;

[0007] The product conveying device includes a first conveying module and a second conveying module;

[0008] The first conveying module picks up a material plate from the feeding area and places the material plate at a predetermined detection position of the second conveying module;

[0009] The second conveying module is located in the center of the material testing device and is used to adjust the material plate placed at the predetermined testing position to the testing posture and move it to the material testing device for electromagnetic testing.

[0010] The material testing device includes multiple pairs of test antennas with different test frequencies, wherein each pair of test antennas is respectively arranged on both sides of the second transmission module;

[0011] The control device is used to control the product conveying device to convey the material plate and to control the material testing device to test the material plate to obtain the electromagnetic test parameters of the material plate.

[0012] Optionally, the first conveying module includes a three-degree-of-freedom moving module and a product picking module;

[0013] The product suction module is disposed at the movable end of the movable module;

[0014] After the control device controls the moving module to move to the feeding area, it controls the product suction module to suction the material plate. Then, when the moving module moves to the detection position, it controls the product suction module to release the material plate.

[0015] The first conveying module further includes a first vision detection module, which is disposed at the end of the moving module or on the product picking module;

[0016] The control device acquires a first image of the material plate through the first vision detection module, determines a first relative position of the material plate relative to the feeding area based on the first image, and controls the moving module to move based on the first relative position and the position of the product suction module so that the product suction module moves to the feeding area of ​​the material plate to pick up the material plate.

[0017] Optionally, the second conveying module includes a linear conveying module and a rotary module;

[0018] The rotation module includes a support component and an attitude adjustment component disposed on the support component for supporting and adjusting the material plate, wherein a predetermined detection position is provided on the attitude adjustment component;

[0019] The support component is fixedly mounted on the linear conveying module, which is arranged along a direction perpendicular to the connection line of each pair of antennas, thereby driving the support component to move linearly.

[0020] Optionally, the attitude adjustment assembly includes a first support plate and a second support plate that are capable of relative rotation;

[0021] The first support plate is configured corresponding to the first conveying module, and the side corresponding to the second support plate is used to support the material plate conveyed by the first conveying module;

[0022] The control device controls the linear conveying module to move linearly while simultaneously controlling the second support plate carrying the material plate to rotate toward the first support plate until the material plate reaches the predetermined detection position. The second support plate and the first support plate cooperate to confine the material plate to the predetermined detection position.

[0023] Optionally, the material testing device further includes a second visual inspection module, which is disposed on top of the second conveying module;

[0024] The second visual detection module is used to acquire a second image of the material plate at the center of the test antenna, and determine the detection posture of the material plate based on the second image. The detection posture includes the distance between the material plate and the two corresponding test antennas, whether the plane of the material plate is perpendicular to the line connecting the two corresponding test antennas, and the offset distance between the center of the material plate and the center of the two corresponding test antennas.

[0025] The control device is used to control the second conveying module to move or rotate the material plate to adjust the detection posture of the material plate.

[0026] Optionally, the control device is used to control the product conveying device to move to the test position corresponding to each pair of test antennas before testing the material plate to perform blank calibration tests and obtain blank parameters; control the product conveying device to convey standard material parts to the corresponding test positions to perform standard parameter calibration and obtain predetermined detection positions and detection postures; after controlling the product conveying device to convey the material plate to the corresponding predetermined detection positions and detection postures to perform tests and obtain test results, obtain the electromagnetic test parameters of the material plate based on the blank parameters and the test results.

[0027] Optionally, the control device is further configured to, after controlling the product conveying device to convey the standard material part to the corresponding test position to obtain standard parameters through standard parameter calibration testing, determine the position adjustment amount of the product conveying device relative to the test position based on the blank parameters, the standard parameters, and the fixed electromagnetic parameters of the standard material part, the position adjustment amount including the movement adjustment amount and the rotation adjustment amount, and update the test position of the material plate based on the position adjustment amount.

[0028] Optionally, the control device is further configured to control the product conveying device to convey the material plate to a new test position for testing to obtain initial test parameters, adjust the test position of the material plate based on a preset number of test position adjustment amounts, and then perform testing again to obtain adjusted test parameters, and obtain electromagnetic test parameters of the material plate based on the initial test parameters and the adjusted test parameters.

[0029] Optionally, the control device is used to select matching test parameters from the initial test parameters and the adjusted test parameters as electromagnetic test parameters for the material plate based on a preset test parameter trend model.

[0030] Another aspect of this application discloses a testing method using the material electromagnetic parameter testing system described above, the method comprising:

[0031] The product conveying device is controlled to convey the material plate, and the material testing device is controlled to test the material plate to obtain the electromagnetic test parameters of the material plate.

[0032] The beneficial effects of this application are as follows:

[0033] This system integrates vision technology with automated control to achieve full automation of the material electromagnetic parameter testing process. In terms of positioning accuracy, it uses visual inspection algorithms to accurately identify the coordinates and contours of the material plate, correcting deviations in real time, reducing the risk of bias and test data errors. The entire process requires no manual intervention; from material plate placement and orientation adjustment to multi-band testing, everything is completed automatically, significantly improving testing efficiency and meeting the needs of high-precision, automated, and high-volume testing, making it suitable for various application scenarios. Attached Figure Description

[0034] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0035] Figure 1 This diagram illustrates the structure of a material electromagnetic parameter testing system provided in an embodiment of this application.

[0036] Figure 2 This diagram shows the structure of the first conveying module of the material electromagnetic parameter testing system provided in an embodiment of this application;

[0037] Figure 3 This diagram shows the structure of the second conveying module of the material electromagnetic parameter testing system provided in an embodiment of this application;

[0038] Figure 4 This diagram illustrates the automatic testing link of the material electromagnetic parameter testing system provided in an embodiment of this application.

[0039] Figure 5 This diagram illustrates the structure of a material electromagnetic parameter testing system, including a mobile servo, provided in an embodiment of this application.

[0040] Figure 6 A schematic diagram of the structure of a computer programmable logic device used to implement embodiments of the present invention is shown.

[0041] Figure label:

[0042] 1. Test antenna; 2. Three-degree-of-freedom motion module; 3. Product pick-up module; 4. Unloading area; 5. Linear conveyor module; 6. Rotation module; 61. Support assembly; 62. First support plate; 63. Second support plate; 7. Material plate; 9. Control device; 10. Motion servo; 81. Vector network analyzer; 82. RF switching matrix module. Detailed Implementation

[0043] To more clearly illustrate this application, the following description, in conjunction with embodiments and accompanying drawings, further clarifies the application. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of this application.

[0044] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0045] It should also be noted that, in the description of this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Currently, existing free-space method testing systems still have the following problems:

[0047] 1. Low level of automation: Sample loading and unloading, positioning, posture adjustment and testing processes rely heavily on manual operation, which is inefficient and prone to human error;

[0048] 2. Insufficient test throughput: It is difficult to achieve continuous automatic testing of batch samples, which cannot meet the needs of production line and high-throughput testing.

[0049] 3. Test accuracy is greatly affected by operation: The placement position of the sample, the attitude angle, and the alignment accuracy with the antenna will all affect the accuracy and repeatability of the test results;

[0050] 4. Low system integration: Mechanical, radio frequency, control, and software subsystems are often designed independently, resulting in poor coordination and insufficient overall reliability;

[0051] 5. Lack of intelligent process monitoring: The test process lacks the ability to monitor and adjust the sample and system status in real time.

[0052] Therefore, there is an urgent need for a high-throughput unmanned free-space testing system that integrates automated loading and unloading, high-precision motion control, machine vision positioning, automatic switching of multi-band antennas, and intelligent software control to achieve efficient, accurate, repeatable, and large-scale automated testing of material electromagnetic parameters.

[0053] In order to solve at least one of the problems existing in the prior art, according to one aspect of this application, such as Figures 1-3 As shown in the figure, this embodiment discloses a material electromagnetic parameter testing system. The system includes a product conveying device, a material testing device, and a control device 9.

[0054] The product conveying device includes a first conveying module and a second conveying module. The first conveying module picks up the material plate 7 from the feeding area 4 and places the material plate 7 at a predetermined detection position of the second conveying module. The second conveying module is located in the center of the material testing device and is used to adjust the material plate 7 placed at the predetermined detection position to the detection posture and move it to the material testing device for electromagnetic testing.

[0055] In this embodiment, the material electromagnetic parameter testing system achieves accurate and efficient testing of the electromagnetic parameters of the material plate 7 through the collaborative work of multiple devices. It should be noted that the first and second conveying modules of the product conveying device do not operate independently, but rather form a closed-loop collaboration under the unified scheduling of the control device 9, ensuring stable transmission of the material plate 7 from pickup to the testing position throughout the entire process. This application is not limited to this; the overall layout of the system can be flexibly adjusted according to the spatial conditions and batch testing requirements of the actual application scenario. For example, in large-batch testing scenarios, the movement trajectory of the conveying device can be optimized to improve turnover efficiency. For instance, in a space-constrained laboratory environment, the relative positions of the first and second conveying modules can be adjusted to reduce the system's space occupation without affecting testing accuracy.

[0056] The material testing device includes multiple pairs of test antennas 1 with different test frequencies, wherein each pair of test antennas 1 is respectively arranged on both sides of the second transmission module.

[0057] To cover various test frequency bands that the material may require, the material testing device includes multiple pairs of test antennas 1 with different test frequencies. It should be noted that each pair of test antennas 1 is positioned on both sides of the second transmission module to ensure that the material board 7 forms a stable signal interaction environment with the antennas during the testing process.

[0058] The control device 9 is used to control the product conveying device to convey the material plate 7 and to control the material testing device to test the material plate 7 to obtain the electromagnetic parameters of the material plate 7.

[0059] As the core control unit of the system, the control device 9 is responsible for coordinating the timing of the conveying device's actions, processing the feedback data from the testing device in real time, and dynamically adjusting the working status of each component according to the testing progress to ensure the continuity and accuracy of the testing process.

[0060] In an optional embodiment, the first conveying module includes a three-degree-of-freedom moving module 2 and a product suction module 3; the product suction module 3 is disposed at the moving end of the moving module; after the control device 9 controls the moving module to move to the unloading area 4, it controls the product suction module 3 to suck up the material plate 7, and further controls the moving module to move to the material plate 7 when the material plate 7 reaches the preset detection position, it controls the product suction module 3 to release the material plate 7.

[0061] In this embodiment, the three-degree-of-freedom moving module 2 of the first conveying module is used to realize the spatial transfer of the material plate 7. It can achieve displacement in three-dimensional space and adapt to the transportation of the material plate 7 under different relative layouts of the feeding area 4 and the predicted detection position. It should be noted that the product suction module 3 is set at the moving end of the moving module. This integrated design can shorten the response distance of the suction action, improve the suction efficiency, and reduce the inertial influence during the module movement, ensuring the stability of the suction action. This application is not limited to this. The degree-of-freedom design of the moving module can be optimized according to the actual suction requirements. For example, in scenarios where the initial placement angle of the material plate 7 varies, the rotational degree of freedom can be increased to adapt to more suction conditions. For example, for material plates 7 with special surface structures that need to be suctioned at specific angles, the material plate 7 in different states can be obtained by adjusting the movement dimension of the moving module.

[0062] It should be noted that the control device 9 first controls the moving module to move to the unloading area 4, and then starts the suction action of the product suction module 3. This avoids collisions between the suction module and surrounding components during movement, and ensures that the suction action is accurately applied to the predetermined area of ​​the material board 7. When the material board 7 is conveyed to the preset detection position, the control device 9 will trigger a release action according to the preset position judgment conditions, so that the material board 7 is stably placed on the second conveying module for subsequent movement testing.

[0063] In an optional embodiment, the system further includes a first visual detection module disposed at the end of the moving module or on the product suction module 3;

[0064] The control device 9 acquires a first image of the material plate 7 through the first vision detection module, determines a first relative position of the material plate 7 relative to the feeding area 4 based on the first image, and controls the moving module to move based on the first relative position and the position of the product suction module 3 so that the product suction module 3 moves to the predetermined suction position of the material plate 7 to suction the material plate 7.

[0065] In this embodiment, the actual position information of the material plate 7 is obtained in real time through the image recognition technology of the first visual detection module, solving the positioning deviation problem caused by the reliance on preset positions in traditional mechanical picking. It should be noted that the placement of the first visual detection module is flexible; it can be integrated into the end of the moving module or installed on the product picking module 3, as long as it can clearly capture a complete image of the material plate 7 without obstruction or light interference. This application is not limited to this; the type of visual detection module can be selected according to the environmental conditions of the application scenario. For example, in strong light environments, a module with anti-glare function can be selected, while in low light environments, an auxiliary light source can be used to improve image clarity. For example, for the material plate 7 with minimal color difference from the background, a high-resolution visual detection module can be selected to improve the distinguishability of image recognition.

[0066] By analyzing the first image acquired by the first vision detection module, the control device 9 can calculate the first relative position of the material plate 7 relative to the feeding area 4. It should be noted that, based on this relative position and the real-time position data of the product suction module 3, the control device 9 can generate motion commands for the moving module, guiding the product suction module 3 to move to the predetermined suction position. This closed-loop control method based on image feedback can effectively compensate for the effects of initial placement deviations of the material plate 7, environmental vibrations, and other factors, significantly reducing the suction failure rate while avoiding damage to the material plate 7 due to suction deviations.

[0067] In this specific example, to address the issues of material board 7 being easily damaged due to positioning deviation and insufficient recognition accuracy due to low background differentiation, a 5-megapixel high-resolution industrial camera with anti-glare function is integrated as the first vision inspection module and installed at the end of the multi-axis robotic arm of the moving module. Simultaneously, an adjustable-brightness ring-shaped LED auxiliary light source is added to the side of the camera lens, and the light source brightness is preset to be adapted to the current brightness of material board 7, for example, 350 lux. Three calibration reference points are set at the edge of the platform in the unloading area 4. The coordinate data of these reference points is pre-stored by the control device 9 to complete the calibration of the coordinate system of the vision inspection module with the equipment motion coordinate system, controlling the conversion accuracy error between image pixel coordinates and actual physical coordinates.

[0068] After the equipment is started, the stacked material plates 7 are placed on the platform in the feeding area 4. Assuming an initial deviation of ±5mm in material placement, the control device 9 first sends a command to control the moving module to move the first vision detection module to a preset shooting position 150mm directly above the feeding area 4. At the same time, the ring LED auxiliary light source is turned on, and the light source angle is adjusted to 45° to avoid direct light shining on the surface of the material plate 7 and causing reflection interference. Subsequently, the first vision detection module acquires the first image of the material plate 7 according to preset parameters. During the acquisition process, the image preprocessing algorithm built into the camera, such as the improved adaptive threshold segmentation algorithm, is used to reduce noise and enhance contrast, thereby increasing the grayscale difference between the material plate 7 and the stainless steel platform to significantly improve the distinction between the background and the material plate 7.

[0069] After the first image is acquired, it is transmitted to the control device 9 in real time. The control device 9 calls the image recognition algorithm to analyze the preprocessed image. By identifying the feature points of the four corners of the material plate 7 and combining them with the pre-stored coordinates of the calibration reference point of the feeding area 4, the first relative position of the material plate 7 relative to the feeding area 4 is calculated. For example, the offset of the center coordinate of the material plate 7 relative to the preset center coordinate of the feeding area 4 is +3.2mm on the X-axis and -2.8mm on the Y-axis. At the same time, a slight tilt of 1.5° is detected in the material plate 7. Next, the control device 9 reads the current real-time position data of the product suction module 3 and, combined with the first relative position calculated above, generates precise motion commands for the moving module through the inverse kinematics algorithm. The commands include a translation amount of 3.2mm in the reverse X-axis and 2.8mm in the forward Y-axis, as well as a rotation amount of -1.5° around the Z-axis to ensure that the suction cup assembly and the surface of the material plate 7 remain parallel and aligned.

[0070] After the moving module completes translation and rotation according to the motion command, the control device 9 sends another command to the first vision detection module to capture a second image. This confirms that the suction cups of the product suction module 3 are precisely aligned with the predetermined suction position of the material plate 7, namely the suction cup contact area at the center and four corners of the material plate 7 where the force is evenly distributed. Image analysis shows that the alignment deviation has been reduced to ±0.03mm, meeting the suction accuracy requirements. Subsequently, the control device 9 controls the moving module to lower the product suction module 3 to a distance of 2mm from the surface of the material plate 7, and activates the vacuum adsorption system. Through gradual pressure control, for example, gradually increasing from -0.02MPa to -0.06MPa, the pressure is prevented from deforming the material plate 7 due to instantaneous negative pressure, thus achieving stable suction of the material plate 7. After suction is completed, the control device moves the moving module to the next process, improving the efficiency of the entire vision positioning and suction process.

[0071] In an optional implementation, the first vision detection module is further configured to capture a material image of the material plate 7, identify the height difference between the material plate 7 and the fixed surface from the material image to generate the thickness of the material plate 7, and control the three-degree-of-freedom moving module 2 to adjust the suction force of the product suction module 3 according to the thickness of the material plate 7.

[0072] Specifically, the control device 9 adjusts the vacuum suction force generated by the product suction module 3 based on the thickness of the material plate 7, so that the suction force generated by the product suction module 3 matches that of the material plate 7, avoiding damage to the material plate 7 during suction. Furthermore, the control device 9 controls the vertical movement speed of the three-degree-of-freedom moving module 2 driving the product suction module 3, setting at least a proximal stroke close to the material plate 7 and a distal stroke far from the material plate 7. When the product suction module 3 is at the distal stroke, a faster vertical movement speed can be used; when it is at the proximal stroke close to the material plate 7, the vertical movement speed of the product suction module 3 needs to be reduced to avoid damage to the material plate 7 from the instantaneous impact force upon contact. It should be noted that in practical applications, those skilled in the art can set the distances between the distal and proximal strokes and the surface of the material plate 7 according to actual needs; this application does not impose any limitations on this.

[0073] Optionally, the control device 9 can obtain the electromagnetic test parameters of the material plate 7 based on the thickness of the material plate 7 obtained automatically and the test results of the material testing device, without the need for manual detection and input of the thickness parameters of the material plate 7, thus further improving the automation level of the system.

[0074] In a specific example, when the suction module 3 is used to suction the material plate 7, the material plates 7 of different thicknesses are prone to excessive contact impact between the suction module 3 and the material plate 7 due to mismatch in suction force and uncertainty in the position of the material plate 7, which can easily lead to damage to the material plate 7. In this application, the material feeding area 4 is provided with a through-hole corresponding to the side area of ​​a large number of stacked material plates 7, and a gray scale calibration block is set accordingly. The control device 9 pre-stores the standard height data of the gray scale calibration block and the corresponding adaptive suction force parameters for material plates 7 of different thickness ranges, such as a vacuum suction force of -0.04MPa for a thickness of 1-3mm and -0.06MPa for a thickness of 3-5mm, and segmented movement speed parameters, such as a far-end stroke speed of 50mm / s and a near-end stroke speed of 10mm / s, with the near-end stroke threshold set to 5mm from the surface of the material plate 7.

[0075] After the equipment is started, the control device 9 first controls the three-degree-of-freedom moving module 2 to move the first vision detection module to the preset shooting position directly above the feeding area 4. The auxiliary light source is turned on to eliminate ambient light interference. First, the first image of the material plate 7 is acquired to complete the relative position recognition. After determining the precise position of the material plate 7, the moving module is controlled to drive the vision detection module to capture the side image of the stacked material plate 7. The grayscale boundary between the side of the material plate 7 and the fixed surface of the feeding area 4 is identified. The height difference between the material plate 7 and the fixed surface is calculated by combining optical ranging. The actual thickness of the material plate 7 is determined by combining the thickness of the grayscale calibration block. To further improve the reliability of thickness detection, a multi-region sampling verification method can be added to collect height difference data in five regions, including the center and four corners of the material plate 7. After removing outliers, the average value is taken as the final thickness result, which effectively avoids the thickness measurement deviation caused by the unevenness of the surface of the material plate 7.

[0076] After the thickness data is determined, the control device 9 automatically matches the corresponding suction force parameters, adjusts the vacuum adsorption suction force of the suction module, and plans the movement path according to the pre-stored segmented speed parameters. Then, it controls the three-degree-of-freedom moving module 2 to drive the product suction module 3 to move along the planned path. In the initial stage, it moves towards the material plate 7 at a far-end stroke speed of 50 mm / s. When it moves to a distance of 6 mm from the surface of the material plate 7, the control device 9 judges that it is about to enter the near-end stroke by using the distance data collected in real time by the vision detection module, and immediately triggers the speed switching command to reduce the movement speed to 10 mm / s. When the product suction module 3 moves to a distance of 2 mm from the surface of the material plate 7, the control device 9 confirms the position accuracy again by using the vision detection module. After ensuring that it is aligned with the predetermined suction position, the control module continues to slowly descend to contact the surface of the material plate 7 and starts vacuum adsorption to complete stable suction.

[0077] When material plates 7 of different thicknesses are subsequently detected, the control device 9 automatically matches the corresponding vacuum suction force, while the segmented moving speed parameters remain unchanged, achieving adaptive suction control for material plates 7 of different thicknesses. This embodiment effectively solves the limitations of the traditional fixed parameter suction method through the above-mentioned improvements. Among them, multi-area sampling verification improves the thickness recognition accuracy, graded suction force avoids the problems of over-suction deformation of thin materials and insufficient suction to fall off of thick materials, and segmented moving speed significantly reduces the impact force at the moment of contact. Actual testing shows that the damage rate of material plates 7 of different thicknesses is reduced, the connection time between the feeding and testing stages is shortened, and the automation level and production efficiency of the system are greatly improved.

[0078] In an optional embodiment, the second conveying module includes a linear conveying module 5 and a rotating module 6.

[0079] The rotation module 6 includes a support component 61 and an attitude adjustment component disposed on the support component 61 for supporting and adjusting the material plate 7. The attitude adjustment component is provided with a predetermined detection position.

[0080] The support component 61 is fixedly mounted on the linear conveying module 5, which is arranged along a direction perpendicular to the connection line of each pair of antennas, thereby driving the support component 61 to move linearly.

[0081] In this embodiment, the combined design of the linear conveying module 5 and the rotating module 6 of the second conveying module significantly improves the continuity of the testing process. It should be noted that the linear conveying module 5 is positioned perpendicular to the connection line between each pair of antennas, ensuring that the material plate 7 always moves along the arrangement direction of each pair of test antennas 1 during its movement. This enables continuous testing of antennas 1 at different frequencies, improving overall testing efficiency. The linear transmission of the linear conveying module 5 ensures that the material plate 7 accurately enters the testing area of ​​each pair of antennas, avoiding test interruptions due to deviations in the direction of movement. This application is not limited to this; the conveying method of the linear conveying module 5 can be selected according to actual needs. For example, for heavier material plates 7, heavy-duty guide rails can be used to ensure stability; for thinner material plates 7, belt conveying can be used to reduce contact damage. For instance, in scenarios requiring high conveying speed, a high-speed linear motor-driven conveying method can be used to improve overall testing efficiency.

[0082] The support component 61 of the rotating module 6 is fixedly mounted on the linear conveyor module 5 and can rotate synchronously with the linear conveyor module 5. Its structural design must meet the weight requirements of bearing the attitude adjustment component and the material plate 7, while ensuring stability during movement. The attitude adjustment function of the rotating module 6 works in conjunction with the movement function of the linear conveyor module 5, enabling the attitude conversion of the material plate 7 during conveying. This eliminates the need for a separate attitude adjustment station, effectively reducing the system's space occupation and testing time.

[0083] In an optional embodiment, the attitude adjustment assembly includes a first support plate 62 and a second support plate 63 that are capable of relative rotation.

[0084] The first support plate 62 is provided corresponding to the first conveying module, and the side corresponding to the second support plate 63 is used to support the material plate 7 conveyed by the first conveying module;

[0085] The control device 9 controls the linear conveying module 5 to move linearly while controlling the second support plate 63 carrying the material plate 7 to rotate toward the first support plate 62 until the material plate 7 reaches the predetermined detection position. The second support plate 63 and the first support plate 62 cooperate to limit the material plate 7 to the predetermined detection position.

[0086] In this embodiment, the first support plate 62 and the second support plate 63 of the attitude adjustment component have relative rotation capability, enabling the material plate 7 to be adjusted from a horizontal position to a detection posture, meeting the specific requirements for the posture of the material plate 7 during the testing process. This allows the material plate 7 to change from a horizontal to a vertical direction as it moves towards the center of the test antenna 1, and makes the plane of the material plate 7 perpendicular to the line connecting the corresponding pair of test antennas 1, that is, perpendicular to the center line of the coaxiality of the two corresponding test antennas 1. It should be noted that the first support plate 62 is located near the first conveying module, which enables the material plate 7 to move quickly from the first conveying module to the attitude adjustment component, reducing the risk of the material plate 7 falling during the transfer process. This application is not limited to this; the relative rotation angle range of the first support plate 62 and the second support plate 63 can be adjusted according to the requirements of the detection posture, and the rotation drive method can also be flexibly selected, such as using a servo motor drive to ensure rotation accuracy, or using a pneumatic drive to improve the rotation response speed. For example, when a large adjustment of the posture is required, a larger rotation angle range can be designed; when only a fine adjustment of the posture is required, the rotation mechanism can be optimized to improve the fine adjustment accuracy. During testing, while the control device 9 controls the linear conveying module 5 to move, it simultaneously drives the second support plate 63 to rotate toward the first support plate 62. This synchronous control logic can complete the posture adjustment during the conveying of the material plate 7, achieving the purpose of conveying and adjusting at the same time, effectively improving the efficiency of the testing process.

[0087] It should be noted that the design of the second support plate 63 and the first support plate 62 in conjunction with the limiting material plate 7 can ensure that the material plate 7 maintains a stable posture during subsequent linear conveying and testing, and avoids posture deviation caused by vibration or external force.

[0088] In an optional embodiment, the first support plate 62 and the second support plate 63 are hollowed out in the center.

[0089] It should be noted that during electromagnetic testing, if the support plate is a solid structure, it may block or reflect the electromagnetic signal emitted by the test antenna 1, interfering with the signal transmission path and thus affecting the accuracy of the test data. The central hollow design reduces the contact area between the support plate and the test signal, reduces interference with the electromagnetic signal, and ensures that the test signal can smoothly act on the test area of ​​the material plate 7.

[0090] This application is not limited to this; the shape and size of the cutout can be customized according to factors such as the specifications of the material plate 7 and the signal coverage range of the test antenna 1. For example, a circular cutout structure can be used for a circular material plate 7; a rectangular cutout structure can be used for a rectangular material plate 7, ensuring that the edge of the material plate 7 is confined within the first support plate 62 and the second support plate 63 to prevent the material plate 7 from falling. In addition, the central cutout design can also reduce the overall weight of the support plate and reduce the motion load of the linear conveying module 5 and the rotating module 6, which not only helps to improve the flexibility and response speed of conveying and rotation, but also reduces energy consumption and extends the service life of the equipment. It should be noted that the cutout design does not weaken the load-bearing capacity of the support plate; its edge part is structurally optimized to provide a stable support point for the material plate 7, ensuring that the material plate 7 will not deform or fall during conveying, rotation, and testing.

[0091] In an optional embodiment, the structures of the first support plate 62 and the second support plate 63 are fixed, and the size of the predetermined detection position formed by the central cutout is fixed. In order to adapt to the automated testing of material plates 7 of different sizes, in this optional embodiment, when the control device 9 picks up the material plate 7, it identifies the size of the material plate 7 and determines the placement position of the material plate 7 at the predetermined detection position based on the size of the material plate 7 so that at least two adjacent edges of the first support plate 62 and the second support plate 63 can limit the edge area of ​​the material plate 7, so that the testing system can match the electromagnetic parameter testing of material plates 7 of different sizes.

[0092] In an optional embodiment, the material testing apparatus includes multiple pairs of test antennas 1 and a vector network analyzer 81;

[0093] The control device 9 controls the linear conveying module 5 to move to the center of each pair of test antennas 1, and controls the vector network analyzer 81 to perform electromagnetic testing using the test antenna 1 currently corresponding to the material board 7. After the electromagnetic test is completed, the linear conveying module 5 is controlled to move to the center of the next test antenna 1 to perform electromagnetic testing until the test is completed.

[0094] In this embodiment, the multiple pairs of test antennas 1 and the vector network analyzer 81 of the material testing device constitute the core testing unit. The collaborative work of the two enables the detection of electromagnetic parameters of the material plate 7. It should be noted that the control device 9 controls the linear conveying module 5 to move to the center position of each pair of test antennas 1, ensuring that the distance between the material plate 7 and each pair of test antennas 1 is equal, so that the test signal forms a symmetrical operating environment on both sides of the material plate 7.

[0095] This application is not limited to this. The number of test antennas 1 and the corresponding test frequency bands can be flexibly configured according to actual test requirements. For example, for the test requirements of special materials, test antennas 1 in specific frequency bands can be added to optimize test efficiency.

[0096] It should be noted that the control device 9 controls the linear conveyor module 5 to move sequentially to the center of each pair of test antennas 1 for testing according to a preset order. This orderly testing method can avoid test chaos, facilitate the control device 9 to classify, store and analyze the test data of each frequency band, and at the same time ensure that the tests of all preset frequency bands can be fully covered without any omissions.

[0097] In specific examples, such as Figure 4 As shown, the control device 9 is connected to the vector network analyzer 81 and the radio frequency switching matrix module 82 respectively. The vector network analyzer 81 is electrically connected to multiple test antennas 1 through the radio frequency switching matrix module 82.

[0098] Specifically, when testing the material plate 7, when the first conveying module of the product conveying device places the material plate 7 at the predetermined testing position, the second conveying module adjusts the material plate 7 to the testing posture and moves the material plate 7 linearly to the testing position at the center of the first pair of test antennas 1. The product conveying device of this application adjusts the posture and position of the material plate 7 while rotating and moving it linearly, so as to achieve the purpose of quickly transporting the material plate 7 to the testing position and adjusting it to the testing posture, thereby improving testing efficiency and ensuring testing accuracy.

[0099] When the material board 7 reaches the test position of the first set of test antennas 1, the control device 9 selects the corresponding test antenna 1 through the RF switching matrix module 82 to transmit test electromagnetic signals, and performs the first test on the material board 7 through the vector network analyzer 81. After the test is completed, the product conveying device moves the material board 7 to the test position of the second set of test antennas 1, and the control device 9 selects the second set of test antennas 1 through the RF switching matrix module 82 to transmit test electromagnetic signals, performing the second test on the material board 7. The control device 9 achieves multiple continuous tests on the material board 7 by comprehensively controlling the product conveying device and switching test antennas 1, resulting in high testing efficiency and enabling high-throughput automated testing of material electromagnetic parameters without manual intervention throughout the process.

[0100] In an optional embodiment, the material testing device further includes a second visual inspection module disposed on top of the second conveying module;

[0101] The second visual detection module is used to acquire a second image of the material plate 7 at the center of the test antenna 1, and determine the detection posture of the material plate 7 based on the second image. The detection posture includes the distance between the material plate 7 and the two corresponding test antennas 1, whether the plane of the material plate 7 is perpendicular to the line connecting the two corresponding test antennas 1, and the offset distance between the center of the material plate 7 and the center of the two corresponding test antennas 1.

[0102] The control device 9 is used to control the second conveying module to move or rotate the material plate 7 to adjust the detection posture of the material plate 7.

[0103] In this embodiment, the second visual detection module is configured to monitor the material board 7's orientation at the test position in real time, promptly detect and correct orientation deviations, and ensure accurate testing. It should be noted that the second visual detection module is located on top of the linear conveying module 5, allowing for clear observation of the overall state of the material board 7 in the center of the test antenna 1, avoiding obstruction by other components of the testing device, and ensuring the integrity and clarity of image acquisition.

[0104] This application is not limited to this. The number of second vision detection modules can be adjusted according to the detection accuracy requirements. For example, in scenarios with extremely high posture accuracy requirements, multiple vision detection modules can be set up to acquire images from different angles. Through multi-image fusion analysis, the detection posture of the material plate 7 can be determined more comprehensively and accurately. For example, in addition to the top setting, a side-viewing module can also be added to the side of the test area to focus on detecting the verticality of the material plate 7. The detection posture determined by the second vision detection module through analysis of the second image covers key dimensions such as the distance between the material plate 7 and the test antenna 1, the verticality of the plane of the material plate 7 and the line connecting the antenna, and the offset distance between the center of the material plate 7 and the center of the antenna. These dimensions directly affect the interaction effect between the electromagnetic signal and the material plate 7 and are the core factors determining the accuracy of the test data. It should be noted that the control device 9 controls the second conveying module to move or rotate the material plate 7 in real time according to the feedback results of the second vision detection module to ensure that the detection posture of the material plate 7 always meets the test requirements.

[0105] In a specific example, the second vision detection module may include a top main view module installed directly above the test area on the top of the linear conveying module 5, and two side view auxiliary modules symmetrically arranged on both sides of the test area to monitor the test status within the test area from multiple angles.

[0106] In a specific example, the control device 9 pre-stores the standard parameters of the detection posture requirements: the distance between the material plate 7 and the two test antennas 1 is 25±0.1mm, the perpendicularity deviation between the plane of the material plate 7 and the line connecting the two test antennas 1 is ≤0.5°, and the offset distance between the center of the material plate 7 and the center of the two test antennas 1 is ≤0.2mm. Based on the posture requirements, the calibration of each vision detection module is completed.

[0107] After the material plate 7 is picked up through the feeding process and transported to the test area by the linear conveyor module 5, the control device 9 first controls the linear conveyor module 5 to stop moving, triggering the second vision detection module to start image acquisition; the top main view module first acquires the second image of the material plate 7 in the center of the test antenna 1, and extracts the edge feature points of the two test antennas 1 and the contour features of the material plate 7 through the image recognition algorithm, and preliminarily calculates the offset distance between the center of the material plate 7 and the center of the antenna; at the same time, the side view auxiliary modules on both sides synchronously acquire the side images of the material plate 7, and perform multi-image analysis in combination with the top image data to identify the perpendicularity deviation between the plane of the material plate 7 and the line connecting the two test antennas 1, as well as the distance between the two sides of the material plate 7 and the corresponding test antennas 1.

[0108] To enhance the anti-interference capability of attitude detection, this embodiment adds an improved method for image feature point enhancement processing. The contour differentiation between the test antenna 1 and the material plate 7 is enhanced by the edge sharpening algorithm. At the same time, dynamic threshold segmentation technology is used to filter image noise caused by equipment shadows and ambient light in the test area, ensuring the accuracy of feature point recognition.

[0109] The control device 9 can generate precise adjustment instructions for the second conveying module based on the preset attitude standard and the actual detection deviation through kinematic algorithms. First, it controls the translation mechanism of the second conveying module to move the material plate 7 in the horizontal direction to complete the center offset calibration. Then, it controls the rotation mechanism to rotate the material plate 7 to calibrate the perpendicularity of the plane of the material plate 7 to the antenna connection line until the distance standard parameters are met. After each adjustment step is completed, the second visual detection module will collect images again to verify the deviation, avoiding attitude deviation caused by excessive or insufficient adjustment in a single step.

[0110] In alternative implementations, such as Figure 5 As shown, at least one of each pair of test antennas 1 in the material testing device is provided with a motion servo 10, and the control device 9 is further used to control the motion servo 10 to drive the test antenna 1 to move in order to adjust the detection posture of the material plate 7.

[0111] In this embodiment, at least one of each pair of test antennas 1 is equipped with a motion servo 10, allowing the distance between the test antenna 1 and the material plate 7 to vary, thereby further improving the flexibility and accuracy of attitude adjustment. It should be noted that the motion servo 10 possesses high-precision position control capabilities, enabling it to drive the test antenna 1 to make minute displacement adjustments. This adjustment method complements the adjustment of the material plate 7 by the second conveying module, covering a wider range of attitude deviation scenarios.

[0112] This application is not limited to this. The driving method and movement range of the moving servo 10 are designed according to factors such as the thickness of the test material plate 7 and the required adjustment accuracy. For adjustment scenarios with high accuracy requirements, a moving servo 10 with precision ball screw drive can be selected to improve position control accuracy. For example, when the center of the material plate 7 is offset, the position of the test antenna 1 can be adjusted by the moving servo 10 to compensate, avoiding attitude fluctuations or the inability to move the material plate 7 due to frequent movement. The control device 9 is responsible for coordinating the adjustment actions of the moving servo 10 and the second conveying module to ensure that there is no action conflict between the two and to achieve coordinated adjustment. It should be noted that this bidirectional adjustment method can quickly correct the attitude deviation of the material plate 7, which is especially suitable for scenarios with strict requirements for test attitude, effectively improving the system's adaptability to complex test conditions and ensuring the accuracy of test data.

[0113] In an optional embodiment, the control device 9 is used to control the product conveying device to move to the test position corresponding to each pair of test antennas 1 before testing the test material plate 7 to perform blank calibration tests and obtain blank parameters; control the product conveying device to convey standard material parts to the corresponding test positions to perform standard parameter calibration and obtain predetermined detection positions and detection postures; after controlling the product conveying device to convey the material plate 7 to the corresponding predetermined detection positions and detection postures to perform tests and obtain test results, obtain the electromagnetic test parameters of the material plate 7 based on the blank parameters and the test results.

[0114] Specifically, to ensure the accuracy and precision of the material electromagnetic parameter testing, in this optional embodiment, the product conveying device moves to the test position corresponding to test antenna 1 to perform a blank test, obtaining blank parameters where the electromagnetic signal only passes through the air and the product conveying device. Then, a standard material component is transported to the test position via the product conveying device, and its electromagnetic parameters are tested to obtain standard parameters. Since the electromagnetic parameters of the standard material component are known, the electromagnetic test parameters of the standard material component can be obtained based on the blank parameters and the standard parameters. The test position is adjusted using the known electromagnetic parameters of the standard material component, and the test is continued. This process is repeated until the error of the electromagnetic test parameters obtained from the standard material component test meets the requirements, thus completing the calibration of the test position.

[0115] In an optional embodiment, the control device 9 is further configured to, after controlling the product conveying device to convey the standard material part to the corresponding test position to perform standard parameter calibration test to obtain standard parameters, determine the position adjustment amount of the product conveying device relative to the test position based on the blank parameters, the standard parameters and the preset electromagnetic parameters of the standard material part, the position adjustment amount including the movement adjustment amount and the rotation adjustment amount, and update the test position of the material plate 7 based on the position adjustment amount.

[0116] Specifically, by comparing the electromagnetic test parameters of the standard material part obtained from the test with the known electromagnetic parameters of the standard material part, the test error of the test system can be determined. Then, the control device 9 adjusts the test position of the material plate 7. The adjustment can include both movement and rotation. The step movement adjustment amount and rotation adjustment amount for each movement and rotation adjustment can be preset. After each adjustment of the test position, the standard material part is tested again until the test error of the standard material part is within the preset error threshold. The system test position calibration is completed so as to perform accurate electromagnetic testing on the material plate 7 at the adjusted test position and improve the accuracy of the test results.

[0117] In an optional embodiment, the control device 9 is further configured to control the product conveying device to convey the material plate 7 to a new test position for testing to obtain initial test parameters, adjust the test position of the material plate 7 based on a preset number of test position adjustment amounts, and then perform testing again to obtain adjusted test parameters, and obtain electromagnetic test parameters of the material plate 7 based on the initial test parameters and the adjusted test parameters.

[0118] Specifically, it is understandable that in existing technologies, the test position of material board 7 is usually fixed, and different material boards 7 are manually placed into the fixed position for testing. However, for high-throughput, automated testing of material board 7, the system needs to use a product conveying device to pick up the material board 7 for testing each time and place it in the designated position after the test. Therefore, although the test position is calibrated through blank testing and standard material parts, when the product conveying device moves the material board 7 to the test position again and adjusts its attitude, the actual position of the material board 7 may still deviate from the adjusted test position due to inherent system errors. Therefore, this application records the initial test parameters after testing the material board 7 at the test position corresponding to each group of antennas, and then adjusts the test position of the material board 7 through the product conveying device to obtain adjusted test parameters. Among the initial test parameters and multiple adjusted test parameters, the test parameter with the highest accuracy can be determined based on the characteristics of electromagnetic test parameters.

[0119] In an optional implementation, the control device 9 is used to select a matching test parameter from the initial test parameter and the adjusted test parameter as the electromagnetic test parameter of the material plate 7 based on a preset test parameter trend model.

[0120] Specifically, it is understandable that during the testing of material plate 7, there is an essential difference in the waveform of electromagnetic waves emitted by test antenna 1 when they are vertically incident and obliquely incident. This is because the electromagnetic wave incident mode has different effects on the electromagnetic wave polarization state, propagation path and mode interference. This difference is mainly reflected in the overall structure, peak characteristics and polarization consistency of time-domain reflected waves, time-domain transmitted waves and frequency-domain S-parameters. When incident perpendicularly, the time-domain reflected wave exhibits a single sharp main peak with a steep shape and no tail. The baselines before and after the main peak are stable and free of obvious clutter. Under dual-polarization measurement, the peak position, amplitude, and peak height of TE and TM polarization are consistent. This is because the reflection coefficients of TE and TM polarization are exactly the same under normal incidence conditions. All reflected signals return to the receiving antenna along the material normal direction without any additional propagation path interference. Furthermore, parasitic signals such as material edge diffraction and antenna sidelobes are effectively suppressed. The corresponding time-domain transmitted wave also features a single main peak as its core characteristic. The time lag between the peak position and the main peak of the reflected wave strictly conforms to the propagation law of electromagnetic waves in the material. There are no obvious multiple transmission peaks or the amplitude of the secondary peaks is less than 10% of that of the main peak. The overall amplitude is stable and the phase curve is continuous and smooth. The consistency of the dual-polarization waveform is good. This is because the transmitted wave propagates only along the normal direction. Multiple transmission signals at the material front and back interfaces can be effectively separated by time-domain gates, and no non-TEM wave modes are excited. In the frequency domain, the amplitudes of the reflection coefficient and transmission coefficient of the perpendicularly incident wave show a smooth trend with frequency change, without obvious periodic oscillations, sudden peaks or valleys, and the phase-frequency curves show linear or gentle changes without sawtooth-like abrupt changes, reflecting the stable frequency domain response under single-mode propagation of electromagnetic waves.

[0121] Therefore, this application pre-trains a parameter trend model by learning and training the changing trends of the electromagnetic test parameter representation curves through a neural network. The parameter trend model is then used to determine the initial and adjusted test parameters. Furthermore, the parameter trend model is used to evaluate the electromagnetic parameter curves obtained from the tests, identifying any inaccurate curves. This allows for the determination of the final electromagnetic parameters based on the electromagnetic parameter curves at multiple test locations and the difference between the corresponding test location and the adjusted test location. For example, the electromagnetic test parameters of material plate 7 can be output as those whose accuracy reaches a preset threshold and are closest to the adjusted test location. This application compensates for test errors caused by the movement deviation of material plate 7 during automated testing through multiple tests at the same location and intelligent recognition, significantly improving the accuracy of electromagnetic parameter testing for material plate 7. In a specific example, a pre-trained parameter trend model is formed by learning from a large number of material plates 7 of various materials, areas, and thicknesses from historical experiments and their corresponding electromagnetic parameters. Therefore, after obtaining the initial test parameters and the adjusted test parameters, the parameter trend model can determine whether the results of different test parameters are abnormal, and remove obviously abnormal test parameter results. At the same time, the parameter trend model can determine the test result that is closest to the trend of the test parameter curve obtained from the accurate test among multiple test parameters, thereby compensating for the displacement error of the material plate 7 in the automated testing process and avoiding multiple tests or misjudgments.

[0122] When the image analysis results acquired by the second vision detection module show that all attitude parameters of the material plate 7 meet the standard requirements, the control device 9 sends an attitude lock command to the second conveying module and a test start command to the material testing device to start the electromagnetic performance test of the material plate 7. During the test, the second vision detection module maintains low-frequency image acquisition and monitors the detection attitude of the material plate 7 in real time. If the attitude deviation exceeds the threshold due to factors such as equipment vibration, the test is immediately interrupted and the above attitude adjustment process is repeated. The test is resumed after the attitude is recalibrated. To further improve the test accuracy, this embodiment introduces a parameter trend model based on neural networks to collaboratively optimize the test results. First, the parameter trend model is pre-trained. Samples of material plate 7 covering 10 material types, 5 area specifications, and 8 thickness specifications from historical experiments are collected, along with 100,000 sets of electromagnetic test data for the corresponding samples under different test attitudes. This includes information such as test parameter representation curves and test position coordinates. The data is then pre-processed and improved. For example, Z-score standardization can be used to eliminate dimensional differences, and sliding window smoothing can be used to filter test noise, remove extreme abnormal data other than 3σ, and then the preprocessed dataset can be input into a convolutional neural network (CNN) for training. The focus is on learning the changing trend characteristics of electromagnetic parameter curves under different variables, and iterative optimization is performed until the model prediction accuracy reaches more than 98%. The trained parameter trend model is then deployed to the control device 9.

[0123] During the testing phase, control device 9 controls the material testing device to perform three repeated tests at the currently calibrated test position, acquiring three sets of initial test parameters and corresponding parameter curves. Then, the second conveying module is controlled to drive the material plate 7 to perform two fine-tuning adjustments within a ±0.3mm range. Two tests are then performed at the two adjusted positions to acquire the corresponding adjusted test parameters and curves, forming an original test dataset containing seven sets of data. Next, the parameter trend model is activated for intelligent judgment. First, the original test dataset is input into the model. Based on pre-learned curve trend characteristics, the model judges the rationality of each set of parameter curves, removing two sets of abnormal data that deviate from the standard trend threshold. Then, the curve trends of the remaining five sets of valid data are matched with the standard curves of similar materials and specifications in the model to calculate a similarity score. Simultaneously, a comprehensive score is calculated based on the distance between each test position and the initial calibration position. Finally, the set of data with the highest comprehensive score is selected as the final electromagnetic test parameters for the material plate 7.

[0124] This embodiment effectively solves the problem of accurately controlling posture deviation in automated testing by employing improved techniques such as multi-view visual inspection and step-by-step closed-loop adjustment. It also combines a neural network-based parameter trend model to achieve intelligent optimization of test data. Multi-image fusion analysis enables comprehensive monitoring of the detection posture across multiple dimensions, the step-by-step adjustment strategy improves the accuracy of posture calibration, and dynamic anti-interference processing ensures testing stability in complex production environments. Improvements such as parameter trend model preprocessing and feature enhancement significantly improve the accuracy of abnormal data identification and valid data selection, substantially enhancing the reliability of test data. This also avoids invalid tests caused by posture or movement deviations, further improving the automation level and testing efficiency of the production line.

[0125] Optionally, an environmental monitoring module can be set up, which includes hardware such as temperature and humidity sensors to monitor real-time changes in environmental factors such as ambient temperature, humidity, and VNA phase drift. By learning the correlation between changes in environmental factors and measurement errors through a parameter trend model, a multi-factor error compensation model can be constructed. This model is then used to compensate for environmental factors in the electromagnetic test parameters to further improve the accuracy of the electromagnetic parameter test results.

[0126] In a specific example, in addition to introducing a neural network-based parameter trend model to collaboratively optimize test results, an environmental monitoring module can be added to construct a multi-factor error compensation model, achieving dual error compensation for environmental factors and displacement deviations. Specifically, the pre-training of the parameter trend model and the construction of the multi-factor error compensation model are completed first. Seven samples of material plates covering 10 material types, 5 area specifications, and 8 thickness specifications from historical experiments are collected, along with 150,000 sets of electromagnetic test data for the corresponding samples under different test postures and environmental conditions. This includes information such as test parameter representation curves, test position coordinates, ambient temperature, humidity, and VNA phase drift data. Data preprocessing improvements include: Z-score standardization to eliminate dimensional differences, smoothing through a sliding window to filter test noise, and removing extreme outliers other than 3σ. To address the time synchronization issue between environmental and test data, timestamp alignment is added to ensure each set of test data accurately matches the corresponding environmental parameters. The preprocessed dataset is then divided into two parts: one part is input into a convolutional neural network (CNN) to train a parameter trend model, focusing on learning the correlation trends between material properties, test location, and parameter curves; the other part is input into a deep neural network (DNN) to train an environmental factor correlation model. Finally, a multi-factor error compensation model is constructed through a model fusion strategy, iteratively optimized until the overall model compensation accuracy reaches over 99%, and then deployed to control device 9.

[0127] Meanwhile, the environmental monitoring module can be deployed as follows: three sets of temperature sensors and two sets of humidity sensors are evenly arranged around the test area. A phase drift detector is installed at the signal output end of the VNA test instrument. Each sensor is connected to the control device 9 through an industrial bus. The environmental parameter acquisition frequency is set to 100ms / time to ensure real-time capture of environmental changes.

[0128] During the testing phase, the control device 9 simultaneously initiates material testing and environmental monitoring: on one hand, it controls the material testing device to perform three repeated tests at the currently calibrated test position, obtaining three sets of initial test parameters and corresponding parameter curves; then, it controls the second conveying module to drive the material plate 7 to perform two fine adjustments within a range of ±0.3mm, and performs two tests at the two adjusted positions respectively, obtaining four sets of adjusted test parameters and corresponding curves, forming an original test dataset containing seven sets of data; on the other hand, the environmental monitoring module collects the temperature, humidity, and VNA phase drift data of the test area in real time, transmits them synchronously to the control device 9 and timestamps them to ensure accurate matching with each set of test data. Next, a multi-factor error compensation model is activated for intelligent optimization: First, the original test dataset and corresponding environmental parameters are input into the model. The model first calls the parameter trend model part and removes two sets of abnormal data that deviate from the standard trend threshold based on the pre-learned curve trend features. Second, for the remaining five sets of valid data, the model calls the environmental factor correlation part and calculates the test error compensation amount under the current environmental conditions by combining the correlation patterns between real-time environmental parameters and historical training. Third, the distance between each test position and the initial calibration position is combined with a weight of 30%, curve similarity weight of 50%, and environmental compensation fit weight of 20% for comprehensive scoring. Finally, the data with the highest comprehensive score, for example, a set of data with a curve similarity of 96%, a distance of 0.05mm from the initial position, and an environmental compensation fit of 98%, is used as the final electromagnetic test parameters for material plate 7 after adding the environmental error compensation amount.

[0129] This embodiment uses a multi-factor error compensation model combined with multi-sensor data fusion and attention mechanism to accurately discover the correlation between environmental factors and test errors, achieving dual compensation for displacement deviation and environmental error. This significantly improves the reliability and environmental adaptability of test data, while avoiding invalid tests or damage to material board 7 caused by various deviations, and greatly improving the automation level and testing efficiency of the production line.

[0130] This application also discloses a testing method using the material electromagnetic parameter testing system as described in this embodiment. The system includes a product conveying device and a material testing device.

[0131] The product conveying device includes a first conveying module and a second conveying module;

[0132] The first conveying module picks up the material plate 7 from the feeding area 4 and places the material plate 7 at the predetermined detection position of the second conveying module;

[0133] The second conveying module is located in the center of the material testing device and is used to adjust the material plate 7 placed at the predetermined testing position to the testing posture and move it to the material testing device for electromagnetic testing.

[0134] The material testing device includes multiple pairs of test antennas 1 with different test frequencies, wherein each pair of test antennas 1 is respectively arranged on both sides of the second transmission module;

[0135] The method includes:

[0136] The product conveying device is controlled to convey the material plate 7, and the material testing device is controlled to test the material plate 7 to obtain the electromagnetic test parameters of the material plate 7.

[0137] In this embodiment of the application, the testing method achieves efficient and accurate testing of the electromagnetic parameters of the material plate 7 through an automated process, reducing errors and inefficiencies caused by manual intervention.

[0138] Since the principle behind this method is similar to that of the above system, the implementation of this method can be found in the system implementation, and will not be repeated here.

[0139] This application also provides a computer programmable logic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described method.

[0140] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.

[0141] Those skilled in the art will understand that the embodiments of this application can provide methods, systems, or computer programs that produce the systems, apparatuses, modules, or units described in the above embodiments. Specifically, they can be implemented by computer chips or entities, or by products with certain functions. A typical implementation of a programmable logic device is a computer programmable logic device. Specifically, a computer programmable logic device can be, for example, a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation programmable logic device, email programmable logic device, game console, tablet computer, wearable programmable logic device, or any combination of these programmable logic devices.

[0142] In a typical example, a computer programmable logic device specifically includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the method executed by the client as described above, or the method executed by the server as described above.

[0143] The following is for reference. Figure 6 It shows a schematic diagram of the structure of a computer programmable logic device 600 suitable for implementing embodiments of the present application.

[0144] like Figure 6 As shown, the computer programmable logic device 600 includes a central processing unit (CPU) 601, which can perform various appropriate tasks and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage section 608 into a random access memory (RAM) 603. The RAM 603 also stores various programs and data required for the operation of the computer programmable logic device 600. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0145] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal feedback (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed in storage section 608 as needed.

[0146] In particular, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program including program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611.

[0147] Computer-readable media include both permanent and non-permanent, removable and non-removable media that can store information by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage, programmable logic devices, or any other non-transferable media that can be used to store information accessible by a computer programmable logic device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0148] For ease of description, the above devices are described separately by function as various units. Of course, in implementing this application, the functions of each unit can be implemented in one or more software and / or hardware.

[0149] This application is described with reference to flowchart illustrations and / or block diagrams of methods, programmable logic devices (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing programmable logic device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing programmable logic device, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0150] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing programmable logic device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0151] These computer program instructions can also be loaded onto a computer or other programmable data processing logic device, causing a series of operational steps to be executed on the computer or other programmable logic device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable logic device for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0152] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or programmable logic device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or programmable logic device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or programmable logic device that includes said element.

[0153] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0154] This application can be described in the general context of computer-executable instructions, such as program modules, that are executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This application can also be practiced in distributed computing environments where tasks are performed by remotely processed programmable logic devices connected via a communication network. In a distributed computing environment, program modules can reside in local and remote computer storage media, including storage for programmable logic devices.

[0155] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0156] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A material electromagnetic parameter testing system, characterized in that, This includes product conveying devices, material testing devices, and control devices; The product conveying device includes a first conveying module and a second conveying module; The first conveying module picks up a material plate from the feeding area and places the material plate at a predetermined detection position of the second conveying module; The second conveying module is located in the center of the material testing device and is used to adjust the material plate placed at the predetermined testing position to the testing posture and move it to the material testing device for electromagnetic testing. The material testing device includes multiple pairs of test antennas with different test frequencies, wherein each pair of test antennas is respectively arranged on both sides of the second transmission module; The control device is used to control the product conveying device to convey the material plate and to control the material testing device to test the material plate to obtain the electromagnetic test parameters of the material plate; The control device is used to control the product conveying device to move to the test position corresponding to each pair of test antennas before testing the material plate to perform blank calibration tests and obtain blank parameters; control the product conveying device to convey standard material parts to the corresponding test positions to perform standard parameter calibration and obtain predetermined detection positions and detection attitudes; after controlling the product conveying device to convey the material plate to the corresponding predetermined detection positions and detection attitudes to perform tests and obtain test results, the electromagnetic test parameters of the material plate are obtained based on the blank parameters and the test results. The control device is further configured to, after controlling the product conveying device to convey a standard material component to the corresponding test position to obtain standard parameters through standard parameter calibration testing, determine the position adjustment amount of the product conveying device relative to the test position based on the blank parameters, the standard parameters, and the fixed electromagnetic parameters of the standard material component. The position adjustment amount includes a movement adjustment amount and a rotation adjustment amount. The test position of the material plate is updated based on the position adjustment amount.

2. The material electromagnetic parameter testing system according to claim 1, characterized in that, The first conveying module includes a three-degree-of-freedom moving module and a product picking module; The product suction module is disposed at the movable end of the movable module; After the control device controls the moving module to move to the feeding area, it controls the product suction module to suction the material plate. Then, when the moving module moves to the detection position, it controls the product suction module to release the material plate. The first conveying module further includes a first vision detection module, which is disposed at the end of the moving module. On the part or the product suction module; The control device acquires a first image of the material plate through the first vision detection module, determines a first relative position of the material plate relative to the feeding area based on the first image, and controls the moving module to move based on the first relative position and the position of the product suction module so that the product suction module moves to the feeding area of ​​the material plate to pick up the material plate.

3. The material electromagnetic parameter testing system according to claim 1, characterized in that, The second conveying module includes a linear conveying module and a rotary module; The rotation module includes a support component and an attitude adjustment component disposed on the support component for supporting and adjusting the material plate, wherein a predetermined detection position is provided on the attitude adjustment component; The support component is fixedly mounted on the linear conveying module, which is arranged along a direction perpendicular to the connection line of each pair of antennas, thereby driving the support component to move linearly.

4. The material electromagnetic parameter testing system according to claim 3, characterized in that, The attitude adjustment assembly includes a first support plate and a second support plate that are capable of relative rotation; The first support plate is configured corresponding to the first conveying module, and the side corresponding to the second support plate is used to support the material plate conveyed by the first conveying module; The control device controls the linear conveying module to move linearly while simultaneously controlling the first support plate carrying the material plate to rotate toward the second support plate until the material plate reaches the predetermined detection position. The second support plate and the first support plate cooperate to confine the material plate to the predetermined detection position.

5. The material electromagnetic parameter testing system according to claim 1, characterized in that, The material testing device further includes a second vision inspection module, which is disposed on top of the second conveying module; The second visual detection module is used to acquire a second image of the material plate at the center of the test antenna, and determine the detection posture of the material plate based on the second image. The detection posture includes the distance between the material plate and the two corresponding test antennas, whether the plane of the material plate is perpendicular to the line connecting the two corresponding test antennas, and the offset distance between the center of the material plate and the center of the two corresponding test antennas. The control device is used to control the second conveying module to move or rotate the material plate to adjust the detection posture of the material plate.

6. The material electromagnetic parameter testing system according to claim 1, characterized in that, The control device is further used to control the product conveying device to convey the material plate to a new test position for testing to obtain initial test parameters, adjust the test position of the material plate based on multiple preset test position adjustment amounts, and then test again to obtain adjusted test parameters, and obtain electromagnetic test parameters of the material plate based on the initial test parameters and the adjusted test parameters.

7. The material electromagnetic parameter testing system according to claim 6, characterized in that, The control device is used to select matching test parameters from the initial test parameters and the adjusted test parameters as the electromagnetic test parameters of the material plate based on a preset test parameter trend model.

8. A testing method using the material electromagnetic parameter testing system as described in any one of claims 1-7, characterized in that, The method includes: The product conveying device is controlled to convey the material plate, and the material testing device is controlled to test the material plate to obtain the electromagnetic test parameters of the material plate.

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