Product Inspection System

Abstract

The present invention relates to a product inspection system capable of improving accuracy when analyzing product defects by making the image clearer when photographing a product. To this end, the present invention provides a product inspection system comprising: a product transport unit for transporting a product; a photographing unit provided on the upper part of the product transport unit for photographing the product; and a defect determination unit for analyzing the image of the product photographed by the photographing unit to determine whether it is defective, wherein the photographing unit includes a blocking cover for blocking external light and a first light for illuminating the inside of the blocking cover. Therefore, according to the present invention, unnecessary parts such as shadows can be removed during product photography, and only the product image can be obtained clearly, which has the advantage of dramatically improving accuracy during product inspection.

Description

Technology Field

[0001] The present invention relates to a product inspection system, and specifically, to a product inspection system capable of improving accuracy when analyzing product defects by making the image clearer when photographing a product. Background Technology

[0002] Machine vision is a technology that acquires images using a camera and analyzes them using a computer. In other words, a camera acting as the human eye acquires images to perform tasks such as identifying, inspecting, and measuring products.

[0003] Visual inspection is subject to varying defect standards among inspectors and inevitably faces physical limitations when inspecting large volumes of goods. In contrast, machine vision boasts groundbreakingly superior performance, including speeds that humans simply cannot match, high accuracy that maintains consistent defect standards, and high performance that remains unwavering even during mass inspections.

[0004] According to the prior art registered patent No. 10-2108956 (machine vision inspection device having machine vision modular software utilizing artificial intelligence), the invention includes a storage unit that stores training sample data of a first volume for multiple inspection items related to a designated product differently for each user for AI-based vision inspection, and a control unit that performs AI-based deep learning for each inspection item based on the training sample data of the first volume stored differently and the captured image provided by the shooting device of the production line to perform vision inspection of the designated product, and expands the training sample data from the first volume to the second volume based on the results of the vision inspection, thereby minimizing the preprocessing process and solving the problem of difficulty in applying AI technology due to insufficient initial data.

[0005] However, there is a problem in that if the original image itself is not sharp during product photography or if there are parts such as shadows that make image analysis difficult, poor results are inevitably obtained in subsequent processes. The problem to be solved

[0006] The present invention aims to solve the aforementioned problems, and specifically, to provide a product inspection system capable of removing unnecessary parts such as shadows during product photography and obtaining only a clear product image. means of solving the problem

[0007] To achieve the above objective, the present invention provides a product inspection system comprising: a product transfer unit for transferring a product; a shooting unit provided on the upper part of the product transfer unit for photographing the product; and a defect determination unit for analyzing an image of the product photographed by the shooting unit to determine whether it is defective, wherein the shooting unit includes a blocking cover for blocking external light and a first light for illuminating the inside of the blocking cover.

[0008] The lower part of the above-mentioned blocking cover is open, and it is preferable that a product transfer unit for transferring products be located there.

[0009] The above product conveying unit may include a transparent belt and a roller supporting the transparent belt.

[0010] It is desirable that a second light be provided at the bottom of the above product to prevent unnecessary images excluding the product. Effects of the invention

[0011] According to the present invention, unnecessary parts such as shadows can be removed during product photography, and only the product image can be obtained clearly, which has the advantage of dramatically improving accuracy during product inspection. Brief explanation of the drawing

[0012] FIG. 1 is a configuration diagram showing the configuration of a product inspection system according to the present invention; FIG. 2 is a configuration diagram showing the configuration of the product transfer unit in FIG. 1; FIG. 3 is a perspective view showing the exterior of the imaging unit in FIG. 1; Figure 4 is a cross-sectional view showing the structure of the imaging unit. Specific details for implementing the invention

[0013] The configuration and operation of a specific embodiment according to the present invention will be described in detail with reference to the drawings.

[0014] Referring to FIG. 1, the product inspection system according to the present invention comprises a product transfer unit (200), a shooting unit (300), and a defect determination unit (400).

[0015] Referring to FIG. 2, the product transfer unit (200) serves to transfer a product to be inspected for defects to a shooting unit. In this embodiment, the product transfer unit (200) may be configured to include a transparent belt, a roller supporting the transparent belt, and a motor.

[0016] The product is transported by being placed on the transparent belt, and the transparent belt is made of a material that transmits visible light to prevent unwanted images, such as shadows, from being captured during product photography. The transparent belt may be made of materials such as polyurethane or silicone.

[0017] The above transparent belt can be supported by a plurality of rollers (230), and the product can be supported while the transparent belt is taut by applying a tensile force through the rollers. In addition, the motor rotates the rollers so that the transparent belt can move according to the rotation of the rollers.

[0018] The above transparent belt can be structured such that it is wound by a roller, the upper transparent belt supports and transports the product, and the lower transparent belt returns after the product has finished transporting.

[0019] The above product transfer unit is equipped with a position detection sensor that detects the position of the product, so that when the product is located below the shooting unit, the transfer of the product can be driven to temporarily stop.

[0020] Referring to FIG. 3, a shooting unit (300) is provided on the upper part of the product transfer unit (200).

[0021] The above-mentioned shooting unit (300) serves to photograph the product transferred to the lower part and generate an image for inspection.

[0022] Specifically, referring to FIG. 4, the shooting unit (300) is configured to include a blocking cover (310), a camera (330), a first light, and a second light (350).

[0023] The above-mentioned blocking cover (310) is made of a material that does not transmit visible light, and has a structure in which the bottom surface is open and the top surface and sides are both closed. In addition, it is preferable that the top surface and sides of the blocking cover have a semicircular cross-section to remove unnecessary images other than the product.

[0024] A camera (330) is installed on the upper part of the above-mentioned blocking cover to photograph a product located below. At this time, a first light is installed near the camera to allow the product to be photographed with bright light. The first light may be provided integrally with the camera.

[0025] For ease of installation, the camera and the first light may be provided separately from the blocking cover and positioned on the upper part of the blocking cover, and a transparent window may be installed on the upper part of the blocking cover so that light from the first light can be transmitted.

[0026] Meanwhile, a second light (350) is provided below the transparent belt supporting the product to remove unnecessary images, including the shadow of the product. The first and second lights may use lighting elements such as LEDs.

[0027] The light irradiated downward from the first light above causes reflection from the product, but since no reflection occurs on the transparent belt, the image excluding the product is excluded. In addition, the second light located below the product and irradiated upward makes the image of the product clearer, so the preprocessing process becomes easier when the defect determination unit determines whether the product is defective, enabling a faster determination and improved accuracy.

[0028] The above defect determination unit (400) performs the role of determining whether a product is defective using an image of the product captured by the shooting unit (300). In this embodiment, the product may be a snack bag, and the sealing condition of the snack bag is inspected through the captured image.

[0029] The above defect determination unit (400) can determine whether a product is defective through artificial intelligence learning, and if it is determined to be defective, it transmits a control signal to collect the product through the product transfer unit.

[0030] The above defect determination unit (400) uses an image of the product to first detect an inspection area to be inspected and marks it in red. For example, in this embodiment, the inspection area is the sealing part of the snack bag, and the ends and the middle part of the snack bag are detected in a shape similar to an "H".

[0031] Subsequently, the trained artificial intelligence model is used to detect images with poor sealing conditions and transmit defect signals to the manager and product transfer unit.

[0032] Although the present invention has been described above with reference to embodiments thereof, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as described in the following claims. Explanation of the symbols

[0033] 200: Product transfer unit 300: Shooting unit 310 : Barrier cover 330 : Camera 350 : Second lighting 400 : Defect determination unit

Claims

Claim 1 The system is configured to include: a product transfer unit for transferring a product; a shooting unit provided on the upper part of the product transfer unit for photographing the product; and a defect determination unit that analyzes the image of the product photographed by the shooting unit to determine whether it is defective. The product transfer unit includes a transparent belt and a roller supporting the transparent belt. The shooting unit includes a blocking cover with opaque upper and side surfaces and an inner cross-section formed in a semicircular shape to block external light and suppress diffuse reflection of an internal light source; a camera installed on the upper part of the blocking cover to photograph the product inside the blocking cover; and a first light that illuminates the inside of the blocking cover. A second light is positioned on the lower part of the product to illuminate upward through the transparent belt to remove shadows around the product and sharpen the outline. A transparent window is installed on the upper part of the blocking cover to allow light from the first light to pass through. The camera and the first light are provided separately from the blocking cover and are located on the upper part of the transparent window. The product transfer unit is equipped with a position detection sensor to detect the position of the product, so that the product is the A product inspection system characterized by being driven to temporarily stop the transport of a product when located at the bottom of a shooting unit. Claim 2 A product inspection system according to claim 1, characterized in that the lower part of the blocking cover is open and a product transfer unit for transferring products is located therein. Claim 3 delete Claim 4 delete

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