Linear I-shaped inductor appearance inspection method

Abstract

The invention discloses and provides a linear I-shaped inductor appearance inspection method which is high in inspection efficiency, high in precision and capable of increasing the putting-into-use speed. The method comprises the following steps: 1, establishing a defective product data a, placing defective products on a product conveying device; b, carrying out image acquisition on defective products and judging by a system; c, photographing the defective products; d, creating image data of a defective product image database; and 2, inspecting the product to be inspected: (1) placing the inductor to be inspected on the product conveying device; (2) the clamping device clamps the inductor to be inspected to an image acquisition and discrimination system; (3) the image acquisition module photographs the inductor to be inspected; (4) after receiving the picture information of the inductor to be inspected, the image judgment module extracts picture data in the defective product image database and compares the picture data with the defective product image database; and (5) the control module acts according to a result fed back by the image judgment module. The method is applied to the technical field of appearance inspection of linear I-shaped inductors.

Description

Technical Field

[0001] The present invention relates to an inductor appearance inspection method, and in particular to a linear I-shaped inductor appearance inspection method. Background Art

[0002] I-shaped inductors are one of the electronic components that we often see in plug-in operations. I-shaped inductors include a magnetic core or an iron core winding, which is usually wound on an I-shaped magnetic core according to different parameter requirements and has two pins, such as Figure 1 As shown. At present, the appearance inspection items for I-shaped inductors often include whether the pin soldering is in place and whether there is any tin slag residue, whether the pin length is correct, whether the enameled wire has any wire throwing phenomenon, etc. Most of the above inspection items are inspected manually, but manual inspection is bound to be unable to avoid the disadvantages of manual inspection, such as wrong inspection, missed inspection, low efficiency, etc. In order to improve the efficiency of the appearance inspection of I-shaped inductors, inductor appearance visual inspection equipment has been applied. However, since the specifications and processes of I-shaped inductors produced by each company are different, the addition of inductor appearance inspection visual equipment to the company's production line cannot be put into use in a timely manner. Instead, sufficient comparison samples must be collected to improve the accuracy of the inspection. Therefore, how to speed up the collection of comparison samples in the inductor appearance visual inspection equipment is a technical problem that urgently needs to be solved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a method for inspecting the appearance of a linear I-shaped inductor which has high inspection efficiency, high precision and can accelerate the speed of commissioning.

[0004] The technical solution adopted by the present invention is: the linear I-shaped inductor appearance inspection method of the present invention is applied to the linear I-shaped inductor appearance visual inspection equipment, the linear I-shaped inductor appearance visual inspection equipment includes a product conveying device, a clamping device, an image acquisition and discrimination system, the image acquisition and discrimination system includes an image acquisition module, a defective product image database, a control module, and an image discrimination module, the image acquisition module, the defective product image database, and the image discrimination module are all connected to the control module, and the linear I-shaped inductor appearance inspection method includes the following steps: 1. Establish a defective product database a. placing a plurality of defective linear I-shaped inductors screened out manually on the product conveying device; b. The clamping device clamps defective linear I-shaped inductors one by one to the image acquisition and identification system; c. The image acquisition module takes a picture of defective linear I-shaped inductors; d. Create the defective product image database image data: the control module continuously stores the defective product photos collected by the image acquisition module one by one in the defective product image database until all the defective linear I-shaped inductors are collected.

[0005] 2. Check the products to be inspected ① Place the linear I-shaped inductor to be inspected on the product conveying device; ② The clamping device clamps the linear I-shaped inductor to be inspected to the image acquisition and identification system; ③ The image acquisition module takes a picture of the linear I-shaped inductor to be inspected, and the control module transmits the picture information collected by the image acquisition module to the image recognition module; ④ After receiving the image information of the linear I-shaped inductor to be inspected, the image recognition module extracts the image data in the defective product image database for comparison, and feeds back the comparison result to the control module; ⑤ After the control module receives the feedback from the image recognition module, the control module controls the clamping device to clamp the inspected linear I-shaped inductor to the defective product box or the good product area.

[0006] Furthermore, in step d of establishing a defective product database, after the image acquisition module has completed acquiring all the defective linear I-shaped inductors, all the photos of the defective linear I-shaped inductors are mirrored and all the mirrored photos are stored in the defective product image database.

[0007] Furthermore, in step ④ of inspecting the product to be inspected, a picture data updating step is also included before the comparison result is fed back to the control module, that is, defective products found in random inspection or manual inspection are marked and mixed into the linear I-shaped inductor clamp to be inspected. When the marked defective products are identified by the image recognition module and compared with the original picture data in the defective product image database, the marked defective product photos are stored in the defective product image database, and then the defective product results are fed back to the control module, and the control module controls the clamping device to take the marked defective products to the defective product box. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is the structural diagram of the existing I-shaped inductor; Figure 2 It is a schematic diagram of the structure of the visual inspection equipment for the appearance of a linear I-shaped inductor; Figure 3 It is a block diagram of the image acquisition and discrimination system. DETAILED DESCRIPTION

[0009] like Figure 2 and Figure 3 As shown, in this embodiment, the linear I-shaped inductor appearance inspection method of the present invention is applied to a linear I-shaped inductor appearance visual inspection device, the linear I-shaped inductor appearance visual inspection device includes a product conveying device 1, a clamping device 2, and an image acquisition and discrimination system 3, the image acquisition and discrimination system 3 includes an image acquisition module 4, a defective product image database 5, a control module 6, and an image discrimination module 7, the image acquisition module 4, the defective product image database 5, and the image discrimination module 7 are all connected to the control module 6, and the linear I-shaped inductor appearance inspection method includes the following steps: 1. Establish a defective product database a. Place a plurality of defective linear I-shaped inductors screened out manually on the product conveying device 1.

[0010] b. The clamping device 2 clamps defective linear I-shaped inductors one by one and sends them to the image acquisition and identification system 3.

[0011] c. The image acquisition module 4 takes photos of defective linear I-shaped inductors.

[0012] d. Create the image data of the defective product image database 5: The control module 6 continuously stores the defective product photos collected by the image acquisition module 4 one by one in the defective product image database 5 until all the defective linear I-shaped inductors are collected. When the image acquisition module 4 has collected all the defective linear I-shaped inductors, it will mirror all the photos of the defective linear I-shaped inductors and store all the mirrored photos in the defective product image database 5. Figure 1 For the I-shaped inductor with a certain symmetry shown in the figure, the original image data is doubled by processing with the mirror technology, which speeds up the construction of the image data in the defective product image database 5, and further speeds up the time for the linear I-shaped inductor appearance visual inspection equipment to be put into use. In this embodiment, the mirror processing of the image refers to symmetric each point in the image along the central axis, thereby generating a new image that is symmetrical to the original image on the axis. In this embodiment, the mirror processing of the image adopts horizontal mirroring, that is, the pixels in the image are symmetrically operated in the horizontal direction, and the left and right parts of the image are flipped and symmetrical with each other. In the field of deep learning, data enhancement is a common method to improve model performance. By mirroring the image, training samples similar to the original image but flipped in the mirror can be generated, thereby increasing the diversity of the data set and improving the robustness and accuracy of the deep learning model. The inspection efficiency and accuracy of the linear I-shaped inductor appearance visual inspection equipment can be effectively improved.

[0013] 2. Check the products to be inspected ① Place the linear I-shaped inductor to be inspected on the product conveying device 1.

[0014] ② The clamping device 2 clamps the linear I-shaped inductor to be inspected to the image acquisition and identification system 3.

[0015] ③ The image acquisition module 4 takes a picture of the linear I-shaped inductor to be inspected, and the control module 6 transmits the picture information acquired by the image acquisition module 4 to the image recognition module 7.

[0016] ④ After receiving the image information of the linear I-shaped inductor to be inspected, the image recognition module 7 extracts the image data in the defective product image database 5 for comparison, and feeds back the comparison result to the control module 6.

[0017] ⑤ After the control module 6 receives the feedback from the image recognition module 7, it controls the clamping device 2 to clamp the inspected linear I-shaped inductor to the defective product box or the good product area.

[0018] In step ④, before the comparison result is fed back to the control module 6, it also includes a picture data update step, that is, the defective products found in the random inspection or manual inspection are marked and mixed into the linear I-shaped inductor clamp to be inspected. When the marked defective products are identified by the image discrimination module 7 and compared with the original picture data in the defective product image database 5, the marked defective product photos are stored in the defective product image database 5, and then the defective product results are fed back to the control module 6. The control module 6 controls the clamping device 2 to take the marked defective products to the defective product box, so that the database can be updated without stopping. The defective product image database 5 is updated without stopping the machine, and the defective product image database 5 can continue to run without causing production interruption due to the update operation. This is crucial for systems that require high efficiency and avoids data loss caused by interruptions during the update process. During the update process, the new database can be quickly ensured to be put into use, which helps to quickly switch to the new database after the update is completed without affecting continuous production.

[0019] Although the embodiments of the present invention are described with practical solutions, they do not constitute limitations on the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A method for inspecting the appearance of a linear I-shaped inductor, applied to a device for visually inspecting the appearance of a linear I-shaped inductor, wherein the device comprises a product conveying device (1), a clamping device (2), and an image acquisition and discrimination system (3), wherein the image acquisition and discrimination system (3) comprises an image acquisition module (4), a defective product image database (5), a control module (6), and an image discrimination module (7), wherein the image acquisition module (4), the defective product image database (5), and the image discrimination module (7) are all connected to the control module (6), and wherein: The linear I-shaped inductor appearance inspection method comprises the following steps:

1. Establish a defective product database a. placing a plurality of defective linear I-shaped inductors manually screened out on the product conveying device (1); b. The clamping device (2) clamps defective linear I-shaped inductors one by one to the image acquisition and identification system (3); c. the image acquisition module (4) takes a photo of defective linear I-shaped inductors; d. Creating the image data of the defective product image database (5): the control module (6) continuously stores the defective product photos collected by the image collection module (4) one by one in the defective product image database (5) until all defective linear I-shaped inductors are collected; 2. Inspect the products to be inspected ① placing the linear I-shaped inductor to be inspected on the product conveying device (1); ② The clamping device (2) clamps the linear I-shaped inductor to be inspected to the image acquisition and identification system (3); ③ The image acquisition module (4) takes a picture of the linear I-shaped inductor to be inspected, and the control module (6) transmits the picture information acquired by the image acquisition module (4) to the image identification module (7); ④ After receiving the image information of the linear I-shaped inductor to be inspected, the image recognition module (7) extracts the image data in the defective product image database (5) for comparison, and feeds back the comparison result to the control module (6); ⑤ The control module (6) controls the clamping device (2) to clamp the inspected linear I-shaped inductor to a defective product box or a good product area based on the feedback result from the image recognition module (7).

2. The method for inspecting the appearance of a linear I-shaped inductor according to claim 1, characterized in that: In step d of establishing a defective product database, after the image acquisition module (4) has completed acquiring all defective linear I-shaped inductors, all photos of the defective linear I-shaped inductors are mirrored, and all mirrored photos are stored in the defective product image database (5).

3. The method for inspecting the appearance of a linear I-shaped inductor according to claim 1, characterized in that: In step ④ of inspecting the product to be inspected, before the comparison result is fed back to the control module (6), a picture data updating step is also included, that is, defective products found in random inspection or manual inspection are marked and mixed into the linear I-shaped inductor clamp to be inspected. When the marked defective products are identified by the image recognition module (7) and compared with the original picture data in the defective product image database (5), the marked defective product photos are stored in the defective product image database (5), and then the defective product results are fed back to the control module (6), and the control module (6) controls the clamping device (2) to take the marked defective products into the defective product box.

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