Power magnetic core visual detection device and power magnetic core detection and classification system

Abstract

The invention discloses a power magnetic core visual detection device, and relates to the technical field of non-standard detection equipment, the power magnetic core visual detection device comprises an image acquisition assembly and a detection table used for placing a detected power magnetic core, the image acquisition assembly acquires the maximum sizes of at least two different positions on the detected power magnetic core in the length direction; the average value of the obtained values is recorded as the detection value of the detected power magnetic core, the difference value between the detection value of the detected power magnetic core and the standard maximum size in the length direction is calculated, manual participation is not needed in visual detection, the detection speed is high, the result is accurate, the image acquisition assembly does not make contact with the detected power magnetic core, and the detection accuracy is high. The appearance defect of the detected power magnetic core is avoided, meanwhile, the influence caused by shooting distortion can be effectively eliminated by adjusting the placement mode of the detected power magnetic core and improving the quality of a visual recognition algorithm, errors are eliminated to the maximum extent, and the accuracy of a detection result is ensured. The invention further discloses a power magnetic core detection and classification system which comprises the power magnetic core visual detection device.

Description

Technical Field

[0001] The present invention relates to the technical field of non-standard detection equipment, and in particular to a power core visual detection system and a power core classification system. Background Art

[0002] Power cores, primarily used in various power conversion devices, are one of their core components. Made from materials with high magnetic permeability, power cores provide high magnetic flux density and low magnetic resistance, enabling efficient power conversion. The performance of power cores directly impacts the efficiency, size, and weight of power conversion equipment. Therefore, the research and application of power cores has been a focus of attention in the development of the power electronics industry. Power cores must be used in pairs, requiring high dimensional matching. Significant differences in the dimensions of two power cores can affect their performance when used together. Among the multiple dimensional parameters of power cores, the maximum length dimension is crucial for determining whether they can be used in pairs. Therefore, during the production process, the maximum length dimension of the power cores is measured and grouped based on the measurement results. Power cores with similar maximum length dimensions are grouped together, and cores within a group can be paired for direct use.

[0003] like Figure 1 As shown, since the top surface of the power core has a certain width, there are multiple locations for taking values ​​of the maximum length dimension of the power core. In production, due to limitations in process level and equipment accuracy, the multiple maximum length directions of the power core are often inconsistent. In order to ensure the reliability of the measurement, when obtaining the maximum length dimension of the power core, it is often necessary to first obtain the maximum length dimension of the power core at several different measurement locations, then add the obtained results and calculate the average value, and use the obtained average value as the final measurement value. In the prior art, there are two ways to measure the maximum length dimension of the power core. The first is manual measurement. The problems with this method are: 1. Low efficiency. Calculated at 3 seconds per piece, only about 20 can be measured in one minute; 2. Low detection accuracy. The low measurement accuracy is caused by the strength of the caliper grip, changes in the measurement position, and mental fatigue caused by long-term work. The second is to use a mechanical grating ruler for measurement. Problems caused by this method: 1. Because the grating scale needs to be in direct contact with the magnetic core, if the core is directly measured after grinding, it is easy to cause appearance defects such as the core falling off. Therefore, only the core before grinding can be measured, and the measurement can only be used as a reference, not the final size; 2. Due to the limitation of the measurement principle, only one dimension can be measured at a time, and it is impossible to avoid the influence of core deformation on the size measurement.

[0004] Therefore, a device for detecting the maximum length dimension of a power core is needed that can overcome the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a power core visual inspection device to solve the problems existing in the above-mentioned prior art. The length data of the maximum dimension of the power core to be measured is directly obtained by direct visual inspection. Visual inspection does not require human participation. The maximum dimensions of the length direction of multiple different inspection positions can be obtained in one inspection. The inspection speed is fast and the results are accurate. The image acquisition component does not contact the power core to be measured, avoiding the appearance defects of the power core to be measured. At the same time, adjusting the placement of the power core to be measured and improving the quality of the visual recognition algorithm can effectively eliminate the influence of shooting distortion, minimize errors, and ensure the accuracy of the inspection results.

[0006] The present invention also provides a power magnetic core detection and classification system, including the above-mentioned power magnetic core visual detection device. The power magnetic core detection and classification system provided by the present invention can realize the functions of automatic loading and automatic grading and collection, and can complete the complete process of loading, detection and grading and collection without manual operation.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides a power core visual inspection device, comprising an image acquisition component and a detection platform for placing a power core to be measured, wherein the detection platform is arranged below a collection window of the image acquisition component; after the power core to be measured is placed on the detection platform, the image acquisition component acquires an image of the power core to be measured, and obtains the maximum length dimensions of at least two different positions on the power core to be measured, takes an average value of the obtained multiple values ​​as the detection value of the power core to be measured, and calculates the difference between the detection value of the power core to be measured and the standard maximum length dimension.

[0009] Preferably, it further comprises an adjustment module for adjusting the position of the image acquisition component, and the image acquisition component is arranged on the adjustment module.

[0010] Preferably, the image acquisition component includes a camera, and the camera is arranged on the adjustment module through a camera mounting back plate.

[0011] Preferably, the adjustment module includes a vertical rail and a moving block moving on the vertical rail, the camera mounting back plate is arranged on the moving block, and the slider is provided with a locking device for fixing the moving block on the vertical rail.

[0012] Preferably, it further comprises a light source for enhancing the brightness of the power core being measured, and the light source is arranged above the detection platform.

[0013] The present invention also provides a power core detection and classification system, comprising a feeding conveyor, a discharging classifier and the above-mentioned power core visual detection device, wherein a detection conveyor belt is arranged on the detection table; the feeding conveyor comprises a loading conveyor belt for providing the power core to be measured to the power core visual detection device, and the output end of the loading conveyor belt is connected to the input end of the detection conveyor belt; the discharging classifier comprises a discharging conveyor belt and a classifier for collecting the power core to be measured in grades, the input end of the discharging conveyor belt is connected to the output end of the detection conveyor belt, and the gear position of each classifier corresponds to an independent tolerance interval. The discharging conveyor belt transports the tested power core to the classifier after detection, and after comparing the difference and the gear position, the classifier will collect the tested power cores belonging to the same gear position according to the calculation result of the image acquisition component.

[0014] Preferably, the feed conveyor also includes a feed conveyor belt for providing the measured power core to the loading conveyor belt, and the output end of the feed conveyor belt is connected to one side of the loading conveyor belt; the feed conveyor belt is arranged above the feed conveyor frame, and a slider for driving the feed conveyor belt to move is provided between the feed conveyor belt and the feed conveyor frame, and the slider is provided on a slide rail, the axial direction of the slide rail is parallel to the movement direction of the feed conveyor belt, and slide rail support seats for fixing the slide rail are provided at both ends of the slide rail.

[0015] Preferably, the stepper is a stepping cylinder used to push the measured power core out of the discharge conveyor belt. The stepping cylinder is arranged on one side of the discharge conveyor belt, and the stepping conveyor belt used to convey the measured power core after stepping is arranged on the other side of the discharge conveyor belt. Each stepping cylinder corresponds to an independent stepping conveyor belt, and a partition is provided between adjacent stepping conveyor belts.

[0016] Preferably, the discharging grading machine also includes a discharging grading machine frame, the power core visual detection device, the grading cylinder and the grading conveyor belt are arranged above the discharging grading machine frame, the front section of the detection conveyor belt is arranged below the image acquisition component, and the rear section of the detection conveyor belt is arranged between the grading cylinder and the grading conveyor belt.

[0017] Preferably, it also includes a touch screen for inputting operation instructions and outputting operation results, a gear display screen for displaying the gear number value, and a computer display screen for displaying the collected number of measured power cores in each gear.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The present invention provides a power core visual inspection device, which directly obtains the length data of the maximum dimension of the power core to be measured in the longitudinal direction through direct visual inspection. Visual inspection does not require human participation, and the maximum dimensions of the length directions of multiple different inspection positions can be obtained in one inspection. The inspection speed is fast and the results are accurate. The image acquisition component does not contact the power core to be measured, thereby avoiding appearance defects of the power core to be measured. At the same time, adjusting the placement of the power core to be measured and improving the quality of the visual recognition algorithm can effectively eliminate the influence of shooting distortion, minimize errors, and ensure the accuracy of the inspection results.

[0020] The present invention also provides a power magnetic core detection and classification system, including the above-mentioned power magnetic core visual detection device. The power magnetic core detection and classification system provided by the present invention can realize the functions of automatic loading and automatic grading and collection, and can complete the complete process of loading, detection and grading and collection without manual operation.

[0021] Compared with the prior art, the present invention also achieves the following technical effects:

[0022] 1. In the power core visual inspection device provided by the present invention, the camera is installed on the adjustment module, and the focus distance of the camera can be changed by moving the position of the adjustment module, which facilitates visual inspection of different types of power cores under test.

[0023] 2. The power core visual detection device provided by the present invention is provided with a light source that enhances the brightness of the power core being tested, so that the image collected by the visual detection is clear enough to ensure the reliability of the detection.

[0024] 3. In the power core detection and classification system provided by the present invention, the grading cylinder and the grading conveyor belt work together to smoothly separate and collect the power cores to be measured. The grading cylinder will not push out the power cores to be measured, avoiding damage to the appearance of the power cores to be measured due to fixing methods such as grabbing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 Schematic diagram of different maximum length values ​​of the power core;

[0027] Figure 2 Schematic diagram of the structure of the power core detection and classification system in an embodiment of the present invention;

[0028] Figure 3A schematic diagram of the side structure of a feed conveyor in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the overall structure of the feed conveyor in an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the side structure of a discharging and grading machine in an embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of the overall structure of the discharging and grading machine in an embodiment of the present invention.

[0032] Among them, 1. Feed conveyor; 2. Discharge grader; 3. Feed conveyor belt; 4. Loading conveyor belt; 5. Slide rail; 6. Feed conveyor frame; 7. Slide rail support seat; 8. Slider; 9. Out-of-material sensor; 10. Transition cylinder; 11. Camera; 12. Lens; 13. Light source; 14. Camera mounting back plate; 15. Adjustment module; 16. Touch screen; 17. Transition conveyor belt; 18. Discharge grader frame; 19. Grade conveyor belt; 20. Computer display; 21. Detection conveyor belt; 22. Grade cylinder; 23. Gear display; 24. Pass detection sensor. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The purpose of the present invention is to provide a power core visual inspection device to solve the problems existing in the prior art. The length data of the maximum dimension of the power core to be measured is directly obtained by direct visual inspection. Visual inspection does not require human participation. The maximum dimensions of the length direction of multiple different inspection positions can be obtained in one inspection. The inspection speed is fast and the results are accurate. The image acquisition component does not contact the power core to be measured, avoiding the appearance defects of the power core to be measured. At the same time, adjusting the placement of the power core to be measured and improving the quality of the visual recognition algorithm can effectively eliminate the influence of shooting distortion, minimize errors, and ensure the accuracy of the inspection results.

[0035] The present invention also provides a power magnetic core detection and classification system, including the above-mentioned power magnetic core visual detection device. The power magnetic core detection and classification system provided by the present invention can realize the functions of automatic loading and automatic grading and collection, and can complete the complete process of loading, detection and grading and collection without manual operation.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 2 、 Figure 5 and Figure 6 As shown, the present invention provides a power core visual inspection device, including an image acquisition component and a detection platform for placing the power core to be measured, the detection platform is arranged below the acquisition window of the image acquisition component, after the power core to be measured is placed on the detection platform, the image acquisition component acquires an image of the power core to be measured, and obtains the maximum length direction dimensions of at least two positions on the power core to be measured, takes an average value of the multiple obtained values ​​as the detection value of the power core to be measured, and calculates the difference between the detection value of the power core to be measured and the standard maximum length direction dimension.

[0038] like Figure 5 As shown, the present invention also includes an adjustment module 15 for adjusting the position of the image acquisition component. The image acquisition component is set on the adjustment module 15. The adjustment module 15 drives the image acquisition component to move to adjust the viewing range and focusing distance of the image acquisition component.

[0039] like Figure 5 and Figure 6 As shown, the image acquisition component includes a camera 11, which is set on an adjustment module 15 through a camera mounting back plate 14. The camera 11 is also equipped with a switchable lens 12. In a preferred embodiment, the adjustment module 15 includes a vertical rail and a moving block moving on the vertical rail. The camera mounting back plate 14 is set on the moving block, and the moving block is provided with a locking device for fixing the moving block on the vertical rail.

[0040] like Figure 6 As shown, the present invention also includes a light source 13 for enhancing the brightness of the power core being measured. The light source 13 is arranged above the detection table. In a preferred embodiment, the light source 13 is installed on the adjustment module 15. The light source 13 can move on the adjustment module 15 to adjust the brightness of the light on the power core being measured.

[0041] like Figure 2As shown, the present invention also provides a power core detection and classification system, including a feeding conveyor 1, a discharging classifier 2 and the above-mentioned power core visual detection device, a detection conveyor belt 21 is arranged on the detection table, the feeding conveyor 1 includes a loading conveyor belt 4 for providing the power core to be measured to the power core visual detection device, the output end of the loading conveyor belt 4 is connected to the input end of the detection conveyor belt 21, the discharging classifier 2 includes a discharging conveyor belt and a classifier for collecting the power core to be measured in grades, the input end of the discharging conveyor belt is connected to the output end of the detection conveyor belt 21, the gear position of each classifier corresponds to an independent tolerance interval, the discharging conveyor belt transports the tested power core to the classifier after detection, and after comparing the difference and the gear position, the classifier will collect the tested power cores belonging to the same gear position according to the calculation result of the image acquisition component.

[0042] like Figure 3 and Figure 4 As shown, the feed conveyor 1 also includes a feed conveyor belt 3 for providing the measured power core to the upper feed conveyor belt 4. The output end of the feed conveyor belt 3 is connected to one side of the upper feed conveyor belt 4. The feed conveyor belt 3 is arranged above the feed conveyor frame 6. A slider 8 for driving the feed conveyor belt 3 to move is provided between the feed conveyor belt 3 and the feed conveyor frame 6. The slider 8 is provided on the slide rail 5. The axial direction of the slide rail 5 is parallel to the movement direction of the feed conveyor belt 3. Slide rail support seats 7 for fixing the slide rail 5 are provided at both ends of the slide rail 5. The slider 8 is driven by a transition cylinder 10. The slider 8 drives the feed conveyor belt 3 to move back and forth, realizing the feeding and taking of the feed conveyor belt 3. Specifically, the power core to be measured is placed on the end of the feed conveyor belt 3 away from the loading conveyor belt 4, and then the slider 8 drives the feed conveyor belt 3 to move toward the loading conveyor belt 4. When the power core to be measured contacts the loading conveyor belt 4, it rubs against the loading conveyor belt 4, thereby separating from the feed conveyor belt 3. The slider 8 drives the feed conveyor belt 3 to move in the opposite direction, and repeats the above process for continuous loading. This working method can control the loading speed of the power core to be measured, so that the loading and detection time are consistent, and there will be no redundancy or even collision of the power core to be measured on the conveyor belt. Multiple power cores to be measured can be placed simultaneously during one loading process. Figure 1 As shown, in a preferred embodiment, the feeding conveyor belt 4 and the detection conveyor belt 21 are connected by a transition conveyor belt 17, and the transition conveyor belt 17 can extend the conveying distance to accommodate more power cores to be tested. Figure 4 and Figure 5 As shown, in a preferred embodiment, a material shortage sensor 9 for detecting the passing status of the power core to be measured is provided on the feeding conveyor belt 4, and a passing detection sensor 24 for detecting whether the power core to be measured is in place is provided on the detection conveyor belt 21.

[0043] like Figure 5As shown, the stepper is a stepping cylinder 22 used to push the measured power cores onto the discharge conveyor. The stepping cylinder 22 is located on one side of the discharge conveyor, and the stepping conveyor 19 used to transport the graded measured power cores is located on the other side of the discharge conveyor. Each stepping cylinder 22 corresponds to an independent stepping conveyor 19, and partitions are installed between adjacent stepping conveyor belts 19. After testing, the measured power cores are conveyed to the stepping cylinder 22 that meets the gear position. The stepping cylinder 22 then extends to push the measured power cores onto the corresponding stepping conveyor 19, completing the graded collection.

[0044] like Figure 5 As shown, the discharging grading machine 2 also includes a discharging grading machine frame 18, a power core visual detection device, a grading cylinder 22 and a grading conveyor belt 19 are arranged above the discharging grading machine frame 18, the front section of the detection conveyor belt 21 is arranged below the image acquisition component, and the rear section of the detection conveyor belt 21 is arranged between the grading cylinder 22 and the grading conveyor belt 19.

[0045] like Figure 5 As shown, the present invention further includes a touch screen 16 for inputting operation instructions and outputting operation results, a gear display screen 23 for displaying the gear number value, and a computer display screen 20 for displaying the number of power cores measured in each gear that has been collected.

[0046] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A power core visual detection device, characterized in that: It includes an image acquisition component and a detection platform for placing the power core to be tested, and the detection platform is arranged below the acquisition window of the image acquisition component; After the power core to be measured is placed on the detection table, the image acquisition component captures the image of the power core to be measured, and obtains the maximum length direction dimensions of at least two different positions on the power core to be measured, takes an average value of the multiple values ​​obtained and records it as the detection value of the power core to be measured, and calculates the difference between the detection value of the power core to be measured and the standard maximum length direction dimension.

2. The power core visual detection device according to claim 1, characterized in that: It also comprises an adjustment module (15) for adjusting the position of the image acquisition component, and the image acquisition component is arranged on the adjustment module (15).

3. The power core visual detection device according to claim 2, characterized in that: The image acquisition component comprises a camera (11), and the camera (11) is arranged on the adjustment module (15) via a camera mounting back plate (14).

4. The power core visual detection device according to claim 3 is characterized in that: The adjustment module (15) comprises a vertical rail and a moving block moving on the vertical rail, the camera mounting back plate (14) is arranged on the moving block, and the moving block is provided with a locking device for fixing the moving block on the vertical rail.

5. The power core visual detection device according to claim 1, characterized in that: It also comprises a light source (13) for improving the brightness of the power core being tested, and the light source (13) is arranged above the testing platform.

6. A power core detection and classification system, characterized in that: It comprises a feeding conveyor (1), a discharging grader (2) and a power magnetic core visual inspection device according to any one of claims 1 to 5, wherein a detection conveyor belt (21) is arranged on the inspection table; The feeding conveyor (1) comprises a feeding conveyor belt (4) for providing the power core to be tested to the power core visual detection device, and the output end of the feeding conveyor belt (4) is connected to the input end of the detection conveyor belt (21); The discharging sorting machine (2) comprises a discharging conveyor belt and a grader for collecting the power cores to be tested in grades. The input end of the discharging conveyor belt is connected to the output end of the detection conveyor belt (21). Each gear position of the grader corresponds to an independent tolerance interval. The discharging conveyor belt transports the power cores to be tested after detection to the grader. After comparing the difference and the gear position, the grader collects the power cores to be tested belonging to the same gear position in a centralized manner according to the calculation result of the image acquisition component.

7. The power core detection and classification system according to claim 6, characterized in that: The feeding conveyor (1) further comprises a feeding conveyor belt (3) for providing the measured power magnetic core to the loading conveyor belt (4), and an output end of the feeding conveyor belt (3) is connected to one side of the loading conveyor belt (4); The feed conveyor belt (3) is arranged above the feed conveyor frame (6), and a slider (8) for driving the feed conveyor belt (3) to move is arranged between the feed conveyor belt (3) and the feed conveyor frame (6). The slider (8) is arranged on a slide rail (5), and the axial direction of the slide rail (5) is parallel to the movement direction of the feed conveyor belt (3). Slide rail support seats (7) for fixing the slide rail (5) are arranged at both ends of the slide rail (5).

8. The power core detection and classification system according to claim 6, characterized in that: The stepper is a stepping cylinder (22) used to push the measured power magnetic core out of the discharge conveyor belt. The stepping cylinder (22) is arranged on one side of the discharge conveyor belt. The stepping conveyor belt (19) used to convey the measured power magnetic core after stepping is arranged on the other side of the discharge conveyor belt. Each stepping cylinder (22) corresponds to an independent stepping conveyor belt (19), and a partition is arranged between adjacent stepping conveyor belts (19).

9. The power core detection and classification system according to claim 8, characterized in that: The discharging and grading machine (2) further comprises a discharging and grading machine frame (18); the power core visual detection device, the grading cylinder (22) and the grading conveyor belt (19) are arranged above the discharging and grading machine frame (18); the front section of the detection conveyor belt (21) is arranged below the image acquisition component; and the rear section of the detection conveyor belt (21) is arranged between the grading cylinder (22) and the grading conveyor belt (19).

10. The power core detection and classification system according to claim 6, characterized in that: It also includes a touch screen (16) for inputting operation instructions and outputting operation results, a gear display screen (23) for displaying the gear number value, and a computer display screen (20) for displaying the number of power magnetic cores to be measured in each gear that has been collected.

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