Device for detecting undifferentiated defects on surface of cylinder

Abstract

A cylinder surface undifferentiated defect detection device comprises a detection device body and a line scanning camera installed on the detection device body, a semi-arc-shaped light source cover is arranged on the light source side of the line scanning camera, an opening of the light source cover right faces a detected object, a tunnel portal is formed in the center of the light source cover, and the tunnel portal is connected with the line scanning camera. The tunnel portal is parallel to a detected object, mounting frames are arranged on the upper edge and the lower edge of the inner side of the light source cover, lamp beads which are vertically opposite are connected to the mounting frames, and a diffuse reflection pattern layer is arranged on the inner surface of the light source cover; therefore, the light source is more uniform during image acquisition, light reflected by the surface of the detected object is reduced, and the acquired image is better in effect.

Description

Technical Field

[0001] The present application relates to the field of detection technology, and in particular to a device for detecting indifferent defects on the surface of a cylinder. Background Art

[0002] Cylindrical workpieces are often used in many manufacturing production lines. The detection of surface defects of cylindrical workpieces is an important link in determining whether the product meets quality standards. Currently, line scan cameras and line scan light sources are commonly used in the market for image acquisition. Line scan cameras are special cameras that use a narrow sensor to capture the entire scene. Line scan light sources are specially designed light sources that enable line scan cameras to acquire images. They are also commonly used in surface defect detection. However, when actually acquiring images in this way, the inventors found that due to the reflection of the surface of the object being inspected, many noise points would be generated in the collected images, and the light source was not uniform enough, resulting in poor image quality.

[0003] Therefore, it is necessary for the inventor to design a new cylindrical surface indifferent defect detection device to overcome the above problems. Summary of the invention

[0004] The main purpose of the present application is to provide a cylindrical surface indifferent defect detection device to solve the problems of reflection on the surface of the object being detected, uneven light source and poor collected image effect in the related art.

[0005] In order to achieve the above-mentioned purpose, the present application provides a cylindrical surface indiscriminate defect detection device, including a detection device body, a line scan camera installed on the detection device body, a semicircular arc-shaped light source cover is arranged on the light source side of the line scan camera, the opening of the light source cover is facing the object to be detected, a tunnel opening is opened at the center position of the light source cover, and the tunnel opening is kept parallel to the object to be detected, a mounting frame is arranged on the upper and lower edges of the inner side of the light source cover, and lamp beads are connected to the mounting frame so as to radiate vertically from top to bottom, and a diffuse reflection layer is arranged on the inner surface of the light source cover.

[0006] Furthermore, the lamp beads are arranged on the mounting frame in a dot matrix along edge lines of the upper and lower inner edges of the light source cover.

[0007] Furthermore, the diffuse reflection layer is a diffuse reflection film, and the diffuse reflection film is attached to the inner surface of the light source cover.

[0008] Furthermore, the lamp beads are LED lamps.

[0009] Furthermore, the lamp bead is detachably connected to the mounting frame.

[0010] Furthermore, a first mounting arm and a second mounting arm are provided on the detection device body, the first mounting arm is detachably connected to the line scan camera, and the second mounting arm is detachably connected to the light source cover.

[0011] Furthermore, the light source cover is connected to one end of the second mounting arm through a fastener.

[0012] Furthermore, the first mounting arm and the second mounting arm are provided with height adjustment devices, the detection device body is connected with a sliding track, and the sliding track cooperates with the height adjustment device.

[0013] The utility model provides a cylindrical surface indifferent defect detection device, which has the following beneficial effects compared with the prior art:

[0014] 1. The light source is uniform and the picture collection effect is good; the upper and lower edges of the light source cover of the utility model are provided with mounting frames, lamp beads are connected to the mounting frames, and the inner surface of the light source cover has a diffuse reflection layer. The upper and lower lamp beads are vertically reflected. The diffuse reflection layer of the light source cover makes the light irradiated to the surface of the product more uniform, thereby improving the quality of image collection.

[0015] 2. Reduce the reflection on the surface of the object to be inspected; a light source cover is set at the light source of the line scan camera on the detection device of the utility model. The light source cover is arc-shaped, and a tunnel opening is opened at the center of the light source cover. The tunnel opening and the surface of the object to be inspected are kept parallel. In this state, the light passes through the tunnel opening and hits the object to be inspected, which can greatly reduce the reflection on the surface, and the collected pictures have better effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0017] Figure 1 It is a front view of the indifferent defect detection device on the surface of a cylinder of the utility model;

[0018] Figure 2 It is a rear view of the cylinder surface indifferent defect detection device of the utility model.

[0019] Among them: 1. Line scan camera; 2. Light source cover; 3. Tunnel entrance; 4. Mounting frame; 5. Lamp beads; 6. First mounting arm; 7. Height adjustment device; 8. Sliding track; 9. Diffuse reflection layer; 10. Object to be detected; 11. Second mounting arm. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0022] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0023] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0024] In addition, the term "plurality" shall mean two or more.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] Embodiment 1:

[0027] like Figure 1 and Figure 2As shown, a cylindrical surface non-differentiated defect detection device comprises a detection device body, a line scan camera 1 mounted on the detection device body, a semicircular arc-shaped light source cover 2 is arranged on the light source side of the line scan camera 1, the opening of the light source cover 2 faces the object to be detected 10, a tunnel opening 3 is opened at the center of the light source cover 2, and the tunnel opening 3 is parallel to the object to be detected 10, a mounting frame 4 is arranged on the upper and lower edges of the inner side of the light source cover 2, and lamp beads 5 are connected to the mounting frame 4 for vertically irradiating from top to bottom, and a diffuse reflection layer 9 is arranged on the inner surface of the light source cover 2; through the tunnel opening The tunnel light of 3 is parallel to the object to be detected 10, which can reduce the reflection of the surface of the object to be detected 10 and improve the quality of the collected pictures; the vertically irradiated pearlescent and diffuse reflection layers 9 can enhance the uniformity of the light, and the diffuse reflection layer 9 can evenly scatter the incident light in all directions, so that the light can be more evenly irradiated to the surface of the object to be detected 10. By vertically irradiating the upper and lower lamp beads 5, combined with the diffuse reflection layer 9 on the inner surface of the light source cover 2, the light irradiated to the surface of the object to be detected 10 will be more uniform, thereby improving the quality of image acquisition and further enhancing the detection effect. A mounting seat is set below the object to be detected 10, and the mounting seat is rotatably set on the frame and driven by a motor. The motor is preferably a servo motor, which can make the object to be detected 10 rotate 360 ​​degrees, and cooperate with the line scan camera 1 to dynamically scan and take pictures, and the collected images are more complete.

[0028] Further, such as Figure 2 As shown, the lamp beads 5 are arranged in a dot matrix on the mounting frame 4 along the edge lines of the upper and lower edges of the inner side of the light source cover 2; the dot matrix arrangement can achieve uniform distribution of light, avoid uneven illumination of light, reduce reflection of the detected object 10, and improve detection accuracy.

[0029] Further, such as Figure 2 As shown, the diffuse reflection layer 9 is a diffuse reflection film, and the diffuse reflection film is attached to the inner surface of the light source cover 2; the diffuse reflection layer 9 is a special material, preferably a diffuse reflection film, which is attached to the inner surface of the light source cover 2. The diffuse reflection film is usually formed by alternating stacking of high-refractive index and low-refractive index materials, such as high-refractive index materials such as zinc oxide, silicon dioxide, and magnesium fluoride, and low-refractive index materials such as silicon oxide and magnesium fluoride. The selection of these materials and the design of the layer thickness can cause multiple reflections and interferences of light in the film, thereby achieving the effect of diffuse reflection, achieving the effect of making the light more uniform, and the relatively low cost.

[0030] Furthermore, the lamp bead 5 is an LED lamp. This type of lamp can be a lamp with a long service life, avoiding long-term replacement, saving costs, and the LED lamp is relatively small, saving installation space.

[0031] Further, the lamp bead 5 is detachably connected to the mounting frame 4. The lamp bead 5 is also a consumable, and long-term use may cause loss and insufficient brightness, so the detachable connection designed here facilitates the replacement of the lamp bead 5 in the later stage.

[0032] Further, such as Figure 1 As shown, the detection device body is provided with a first mounting arm 6 and a second mounting arm 11, the first mounting arm 6 is detachably connected to the line scan camera 1, and the second mounting arm 11 is detachably connected to the light source cover 2. The light source cover 2 is connected to one end of the second mounting arm 11 by a fastener. The detachable connection facilitates the replacement of the line scan camera 1 and the light source cover 2 at a later time. When different specifications of cameras need to be replaced when different products need to be detected; the fastener connection is preferably a nut connection.

[0033] Further, such as Figure 1 As shown, the first mounting arm 6 and the second mounting arm 11 are provided with a height adjustment device 7, and the detection device body is connected with a sliding track 8, and the sliding track 8 cooperates with the height adjustment device 7. The object to be detected 10 is a cylindrical workpiece in most cases, but the cylindrical workpiece may have different sizes and different acquisition angles, so a device that can adjust the height of the camera and the light source cover 2 is designed here, which is convenient for adjusting to a suitable height according to the detection objects of different sizes, and is more flexible; the height adjustment device 7 here is preferably opened on the device and then the height is limited by a nut, and it can cooperate with the sliding track 8 to complete the linear motion more accurately and efficiently.

[0034] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cylindrical surface non-differentiated defect detection device, comprising a detection device body, and a line scan camera (1) mounted on the detection device body, characterized in that: A semicircular light source cover (2) is arranged on the light source side of the line scan camera (1), the opening of the light source cover (2) faces the object to be detected (10), a tunnel opening (3) is opened at the center of the light source cover (2), the tunnel opening (3) is parallel to the object to be detected (10), mounting frames (4) are arranged on the upper and lower edges of the inner side of the light source cover (2), lamp beads (5) are connected to the mounting frames (4) for vertically irradiating from top to bottom, and a diffuse reflection layer (9) is arranged on the inner surface of the light source cover (2).

2. The cylindrical surface indifferent defect detection device according to claim 1, characterized in that: The lamp beads (5) are arranged on the mounting frame (4) in a dot matrix along the edge lines of the upper and lower inner edges of the light source cover (2).

3. The cylindrical surface indifferent defect detection device according to claim 1, characterized in that: The diffuse reflection layer (9) is a diffuse reflection film, and the diffuse reflection film is adhered to the inner surface of the light source cover (2).

4. The cylindrical surface indifferent defect detection device according to claim 2, characterized in that: The lamp bead (5) is an LED lamp.

5. The cylindrical surface indifferent defect detection device according to claim 2, characterized in that: The lamp bead (5) is detachably connected to the mounting frame (4).

6. The cylindrical surface indifferent defect detection device according to claim 1, characterized in that: A first mounting arm (6) and a second mounting arm (11) are provided on the detection device body; the first mounting arm (6) is detachably connected to the line scan camera (1), and the second mounting arm (11) is detachably connected to the light source cover (2).

7. The cylindrical surface indifferent defect detection device according to claim 6, characterized in that: The light source cover (2) is connected to one end of the second mounting arm (11) via a fastener.

8. The cylindrical surface indifferent defect detection device according to claim 6, characterized in that: The first mounting arm (6) and the second mounting arm (11) are provided with a height adjustment device (7), the detection device body is connected with a sliding track (8), and the sliding track (8) cooperates with the height adjustment device (7).

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