Appearance detection device for hub motor of electric vehicle based on computer vision system

Abstract

The utility model discloses an electric vehicle hub motor appearance detection device based on a computer vision system, which comprises a conveying mechanism, a carrier, a camera module, a light source module and a computer system, the carrier is connected to the conveying mechanism and can move along the surface of the conveying mechanism, the carrier is used for placing and fixing a hub motor to be detected, and the camera module is connected to the camera module. A rack is fixedly connected above the conveying mechanism, the camera module, the light source module and the computer system are all connected to the rack, the camera module is used for shooting and identifying a hub motor, the light source module is used for illuminating the hub motor, and the computer system is connected with and controls the camera module and the light source module. The camera module can automatically detect and judge the problems of omission, deformation and the like of laser etching characters of products by using an OCR technology, and judges whether the problems of omission of oil seal installation, reverse installation of oil seal, missed installation of screws, valve hole dislocation after assembly of a hub and a side cover and the like exist or not by using a visual comparison technology, so that omission and misjudgment caused by manual inspection are completely eradicated.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle production technology, and in particular to an electric vehicle wheel hub motor appearance inspection device based on a computer vision system. Background Technology

[0002] In the production process of electric vehicle hub motors, various indicators of the hub motor need to be tested before shipment to ensure product quality, among which appearance inspection is a key indicator. Currently, most appearance inspections in the industry are done manually, which is greatly affected by human subjectivity, making it difficult to guarantee consistency and carrying risks such as missed or over-inspected items. Furthermore, as customers' requirements for product quality become increasingly stringent, comprehensive inspection of the hub motor's appearance is needed, including issues such as missing, deformed, or missing laser-engraved characters, double images, discrepancies with QR code content, missing or reversed oil seals, faulty or missing screws, misaligned valve holes after hub and side cover assembly, missing labels, and missing QR codes. Manual methods are insufficient to meet production demands. Therefore, designing an efficient, comprehensive, and accurate inspection device is crucial. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an electric vehicle wheel hub motor appearance inspection device based on a computer vision system.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] An electric vehicle hub motor appearance inspection device based on a computer vision system is characterized by comprising a conveying mechanism, a carrier, a camera module, a light source module, and a computer system. The carrier is connected to the conveying mechanism and can move along the surface of the conveying mechanism. The carrier is used to place and fix the hub motor to be inspected. A frame is fixedly connected above the conveying mechanism. The camera module, the light source module, and the computer system are all connected to the frame. The camera module is used to capture and identify the hub motor, the light source module is used to illuminate the hub motor, and the computer system is connected to and controls the camera module and the light source module.

[0006] Furthermore, the camera module includes a servo motor, a slide rail, a slider, and a camera. The slide rail is vertically fixedly connected to the frame, the slider is slidably connected to the slide rail, the servo motor drives and connects to the slider, and the camera is fixedly connected to the slider. The camera and the servo motor are connected to a computer system.

[0007] Furthermore, the light source module includes a light source bracket and a ring light source. The upper end of the light source bracket is fixedly connected to the slider, and the ring light source is fixedly connected to the lower end of the light source bracket and connected to the computer system.

[0008] Furthermore, the light source support includes a first support and a second support. The first support is connected to the slider, and the upper end of the second support is connected to the first support, while the lower end is connected to the ring light source.

[0009] Furthermore, the camera is located above the center point of the ring light source.

[0010] Furthermore, the light source module also includes an auxiliary light source, which is fixedly connected to the light source bracket and connected to the computer system.

[0011] Furthermore, the auxiliary light source has a long strip-shaped structure.

[0012] Furthermore, the conveying mechanism includes a base and a conveyor belt, the conveyor belt being disposed at the upper end of the base, the carrier being connected to the surface of the conveyor belt, and the frame being connected to the base and straddling the conveyor belt.

[0013] Furthermore, it also includes a display, which is disposed on the front of the rack and connected to the computer system.

[0014] Furthermore, the conveying mechanism is equipped with sensors that can identify the position of the vehicle.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The camera module on this device uses OCR technology to automatically detect and judge problems such as omission, deformation, missing, and ghosting of laser-engraved characters on the product. It uses visual comparison technology to judge whether there are problems such as missing oil seals, reversed oil seals, missing or poorly installed screws, misaligned valve holes after the wheel hub and side cover are assembled, missing labels, and missing QR codes. This eliminates omissions and misjudgments caused by manual inspection and ensures product consistency.

[0017] 2. The computer system enables automatic product model switching without human intervention, and the testing efficiency is higher, more accurate and more comprehensive than that of personnel. The production line can produce a variety of products.

[0018] 3. The technology of binding QR codes with the engraving content of products is adopted to effectively identify incorrect codes and prevent the use of the wrong parts.

[0019] 4. Employing simultaneous camera and light source movement technology, it is compatible with products of different heights and specifications. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the rack;

[0022] Among them: 1-carrier, 2-computer system, 3-hub motor, 4-frame, 5-servo motor, 6-slide rail, 7-slider, 8-camera, 9-ring light source, 10-first bracket, 11-second bracket, 12-auxiliary light source, 13-base, 14-conveyor belt, 15-display. Detailed Implementation

[0023] To enhance understanding of this utility model, we will now describe it in further detail with reference to the accompanying drawings. This embodiment is only used to explain this utility model and does not constitute a limitation on the scope of protection of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," and "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; and they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Figure 1 , 2 An electric vehicle wheel hub motor appearance inspection device based on a computer vision system is shown, including a conveying mechanism, a carrier 1, a camera module, a light source module, a computer system 2, and a display 15.

[0028] The conveying mechanism includes a base 13 and a conveyor belt 14. The conveyor belt 14 is disposed on the upper surface of the base 13. A carrier 1 is connected to the surface of the conveyor belt 14 and is movable along the surface of the conveying mechanism. The carrier 1 is used to place and fix the hub motor 3 to be tested. A frame 4 is connected to the base 13 and spans over the conveyor belt 14. A display 15 is disposed on the front of the frame 4 and connected to a computer system 2.

[0029] like Figure 2 As shown, the camera module, light source module, and computer system 2 are all connected inside the frame 4. The camera module is used to capture and identify the hub motor 3, the light source module is used to illuminate the hub motor 3, and the computer system 2 is connected to and controls the camera module and the light source module.

[0030] The camera module includes a servo motor 5, a slide rail 6, a slider 7, and a camera 8. The slide rail 6 is vertically fixed to the frame 4, the slider 7 is slidably connected to the slide rail 6, the servo motor 5 drives the slider 7, and the camera 8 is fixedly connected to the slider 7. The camera 8 and the servo motor 5 are connected to the computer system 2.

[0031] The light source module includes a light source bracket and a ring light source 9. The light source bracket includes a first bracket 10 and a second bracket 11. The first bracket 10 is connected to the slider 7. The upper end of the second bracket 11 is connected to the first bracket 10, and the lower end is connected to the ring light source 9. The ring light source 9 is connected to the computer system 2. The camera 8 is located above the center point of the ring light source 9.

[0032] The light source module also includes an auxiliary light source 12, which is fixedly connected to the second bracket 11 and connected to the computer system 2. The auxiliary light source 12 has a long strip structure.

[0033] Preferably, the conveying mechanism is equipped with sensors that can identify the position of the vehicle.

[0034] The workflow of the above embodiment is as follows: When the hub motor 3 to be tested, placed on the carrier 1, flows to the bottom of the frame 4 via the conveyor belt 14, the sensor detects the presence of the hub motor 3 and the camera module and light source module are activated; the camera 8 captures the QR code information on the hub motor 3 to control the device software, and the device automatically switches the preset relevant detection parameters and product model to generate a product template for that model; the servo motor 5 is activated to drive the camera 8, the ring light source 9, and the auxiliary light source 12 to move simultaneously to the preset parameter position; the camera 8 captures the hub motor 3 to be tested, and the content of the photo captured by the camera 8 is compared with the parameters set in the system to determine whether the product is qualified; unqualified products stop the process and trigger an alarm for manual handling, while qualified products proceed to the next process; after the test is completed, the next hub motor to be tested flows in.

[0035] The above specific embodiments are only for illustrating the technical concept and structural features of this utility model, and are intended to enable those skilled in the art to implement them. However, the above content does not limit the protection scope of this utility model. Any equivalent changes or modifications made in accordance with the spirit and essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A device for inspecting the appearance of electric vehicle wheel hub motors based on a computer vision system, characterized in that: The system includes a conveying mechanism, a carrier (1), a camera module, a light source module, and a computer system (2). The carrier (1) is connected to the conveying mechanism and can move along the surface of the conveying mechanism. The carrier (1) is used to place and fix the hub motor (3) to be detected. A frame (4) is fixedly connected above the conveying mechanism. The camera module, the light source module, and the computer system (2) are all connected to the frame (4). The camera module is used to photograph and identify the hub motor (3). The light source module is used to illuminate the hub motor (3). The computer system (2) is connected to and controls the camera module and the light source module.

2. The electric vehicle wheel hub motor appearance inspection device based on a computer vision system according to claim 1, characterized in that: The camera module includes a servo motor (5), a slide rail (6), a slider (7), and a camera (8). The slide rail (6) is vertically fixed on the frame (4), the slider (7) is slidably connected to the slide rail (6), the servo motor (5) drives the slider (7), and the camera (8) is fixedly connected to the slider (7). The camera (8) and the servo motor (5) are connected to the computer system (2).

3. The electric vehicle wheel hub motor appearance inspection device based on a computer vision system according to claim 2, characterized in that: The light source module includes a light source bracket and a ring light source (9). The upper end of the light source bracket is fixedly connected to the slider (7), and the ring light source (9) is fixedly connected to the lower end of the light source bracket and connected to the computer system (2).

4. The electric vehicle wheel hub motor appearance inspection device based on a computer vision system according to claim 3, characterized in that: The light source support includes a first support (10) and a second support (11). The first support (10) is connected to the slider (7). The upper end of the second support (11) is connected to the first support (10), and the lower end is connected to the ring light source (9).

5. The electric vehicle wheel hub motor appearance inspection device based on a computer vision system according to claim 3, characterized in that: The camera (8) is located above the center point of the ring light source (9).

6. The electric vehicle wheel hub motor appearance inspection device based on a computer vision system according to claim 3, characterized in that: The light source module also includes an auxiliary light source (12), which is fixedly connected to the light source bracket and connected to the computer system (2).

7. The electric vehicle wheel hub motor appearance inspection device based on a computer vision system according to claim 5, characterized in that: The auxiliary light source (12) has a long strip structure.

8. The electric vehicle wheel hub motor appearance inspection device based on a computer vision system according to claim 1, characterized in that: The conveying mechanism includes a base (13) and a conveyor belt (14). The conveyor belt (14) is disposed on the upper end of the base (13). The carrier (1) is connected to the surface of the conveyor belt (14). The frame (4) is connected to the base (13) and spans over the conveyor belt (14).

9. The electric vehicle wheel hub motor appearance inspection device based on a computer vision system according to claim 1, characterized in that: It also includes a display (15) disposed on the front of the rack (4) and connected to the computer system (2).

10. The electric vehicle wheel hub motor appearance inspection device based on a computer vision system according to claim 1, characterized in that: The conveying mechanism is equipped with sensors that can identify the position of the vehicle.

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