Machine vision detection shading device

Abstract

A machine vision detection shading device comprises a U-shaped mounting frame and a swing frame, a shading plate is arranged at the front end of the swing frame, a connecting shaft is arranged at the rear end of the swing frame, the connecting shaft is rotationally connected with the opening end of the U-shaped mounting frame, a driving mechanism is arranged on the U-shaped mounting frame, and the driving mechanism is in transmission connection with the connecting shaft. An arc-shaped mounting plate concentric with the U-shaped mounting frame is arranged on the portion, on the periphery of the connecting shaft, of the U-shaped mounting frame, a plurality of photosensitive elements are evenly arranged on the outer side face of the arc-shaped mounting plate and serve as control switches to be electrically connected with the driving mechanism, and a connecting rod is arranged at the end of the connecting shaft in the arrangement direction of the swing frame; the end part of the connecting rod is provided with an anti-dazzling screen along the axial direction of the connecting shaft, and the anti-dazzling screen can shield the front of the photosensitive element on the corresponding side of the shading plate. According to the utility model, the light sensitive element senses the angle of the interference light and controls the angle of the light shielding plate for automatic adjustment, the angle of the light shielding plate does not need to be controlled manually, and the detection efficiency of the machine vision system is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of light-shielding equipment technology, and in particular to a light-shielding device for machine vision inspection. Background Technology

[0002] Machine vision inspection is a technology that uses machines to replace human eyes for measurement and judgment, and it is widely used in industrial production, scientific research, and other fields. Its basic principles include image acquisition, image processing, feature extraction, and discrimination control. It involves capturing images of target objects using a camera, converting the images into digital signals, and then using image processing algorithms to analyze the images, ultimately achieving automatic detection and analysis of the target objects.

[0003] In machine vision inspection, light-blocking devices are primarily used to address imaging problems caused by light interference or obstruction in visual inspection systems. Among these, light shields are commonly used to block unwanted light, reducing ghosting or light spots and thus improving image quality. However, in practical applications, it has been found that many external interfering light rays are not static. This necessitates continuous adjustment of the light-blocking equipment during the visual inspection process, making the operation extremely cumbersome and significantly increasing labor costs.

[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a machine vision inspection light-blocking device to solve the above problems.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solution of this utility model and facilitating the understanding of those skilled in the art. It should not be assumed that the above content is known to those skilled in the art simply because it has been described in the background section of this utility model. Utility Model Content

[0006] To overcome the shortcomings of the prior art, the present invention aims to disclose a machine vision inspection shading device to solve the problem that traditional shading devices require frequent adjustment and calibration during use.

[0007] This utility model discloses a machine vision inspection light-shielding device, including a U-shaped mounting frame and a swing frame. The front end of the swing frame is provided with a light-shielding plate, and the rear end of the swing frame is provided with a connecting shaft. The connecting shaft is rotatably connected to the open end of the U-shaped mounting frame. The U-shaped mounting frame is provided with a driving mechanism, which is connected to the connecting shaft for transmission. The U-shaped mounting frame on the outer periphery of the connecting shaft is provided with an arc-shaped mounting plate concentric with it. A plurality of photosensitive elements are evenly provided on the outer surface of the arc-shaped mounting plate. The photosensitive elements are electrically connected to the driving mechanism as control switches. The end of the connecting shaft is provided with a connecting rod along the setting direction of the swing frame. The end of the connecting rod is provided with a light-shielding plate along the axial direction of the connecting shaft. The light-shielding plate can shield the front of the photosensitive element on the corresponding side of the light-shielding plate.

[0008] Preferred technical solution: The light-shielding plate is an arc-shaped light-shielding plate, and the arc axis of the arc-shaped light-shielding plate is the same as the swing axis of the swing frame, so as to facilitate the control of the light-shielding angle.

[0009] Preferred technical solution: The light-shielding sheet is an arc-shaped light-shielding sheet, and the arc axis of the arc-shaped light-shielding sheet is the same as that of the arc-shaped mounting plate, so as to ensure the stability of the light-shielding sheet in shielding the photosensitive element on the arc-shaped mounting plate.

[0010] Preferred technical solution: The U-shaped mounting bracket and the outer periphery of the connecting shaft are provided with an annular guide groove, and the arc-shaped mounting plate is slidably set in the annular guide groove, so that the orientation of the arc-shaped mounting plate can be freely changed.

[0011] Preferred technical solution: The photosensitive element is one of a photoresistor, a photodiode, and a phototransistor.

[0012] Preferred technical solution: A balance bar is connected to the side of the connecting shaft away from the light shield, and a counterweight is detachably provided at the end of the balance bar to balance the force of the swing frame on the other side of the connecting shaft and reduce the rotational resistance of the connecting shaft.

[0013] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0014] This invention relates to a machine vision inspection light-shielding device. A photosensitive element is placed at the swing axis of a light-shielding plate. A light-shielding plate, arranged on a rotating shaft in the same direction as the light-shielding plate, shields the photosensitive element at the corresponding position. In use, when the intensity of external interference light exceeds the threshold of the photosensitive element, the photoresistor activates the drive mechanism to drive the light-shielding plate to swing along the rotating shaft. When the light-shielding plate and the light-shielding plate simultaneously reach the side of the interference light, the light-shielding plate shields the photosensitive element in this direction, and the drive mechanism stops moving. This allows the light-shielding plate and the light-shielding plate to remain at this position, shielding the interference light. Furthermore, as the interference light moves, the light-shielding device can automatically adjust the light-shielding, thereby improving the efficiency and quality of machine vision inspection. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a machine vision inspection light-shielding device according to the present invention;

[0017] Figure 2 for Figure 1A magnified view of a portion of point A in the middle.

[0018] In the attached diagrams above, 1 is a U-shaped mounting bracket; 11 is an annular guide groove; 2 is a swing bracket; 21 is a connecting shaft; 22 is a connecting rod; 23 is a light-shielding plate; 3 is a light-shielding plate; 4 is a drive mechanism; 5 is an arc-shaped mounting plate; 6 is a photosensitive element; 7 is a balance bar; and 8 is a counterweight. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and their synonyms, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0022] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0023] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Example:

[0026] like Figure 1 and Figure 2 As shown, this utility model discloses a machine vision inspection light-shielding device, including a U-shaped mounting frame 1 and a swing frame 2. The front end of the swing frame 2 is provided with a light-shielding plate 3, and the rear end of the swing frame 2 is provided with a connecting shaft 21. The connecting shaft 21 is rotatably connected to the open end of the U-shaped mounting frame 1. The U-shaped mounting frame 1 is provided with a driving mechanism 4, which is connected to the connecting shaft 21 in a transmission manner. The U-shaped mounting frame 1 on the outer periphery of the connecting shaft 21 is provided with an arc-shaped mounting plate 5 concentric with it. A plurality of photosensitive elements 6 are evenly provided on the outer surface of the arc-shaped mounting plate 5. The photosensitive elements 6 are electrically connected to the driving mechanism 4 as control switches. The end of the connecting shaft 21 is provided with a connecting rod 22 along the setting direction of the swing frame 2. The end of the connecting rod 22 is provided with a light-shielding plate 23 along the axial direction of the connecting shaft 21. The light-shielding plate 23 can shield the front of the photosensitive element 6 on the corresponding side of the light-shielding plate 3.

[0027] refer to Figure 1 and Figure 2As shown, the usage method and principle of this utility model are as follows: In use, when the intensity of external interference light shining on a photosensitive element 6 of the arc-shaped mounting plate 5 exceeds a preset threshold, the photosensitive element 6 activates the drive mechanism 4, driving the swing frame 2 and the light-shielding plate 3 to move. Since the light-shielding plate 3 and the light-shielding sheet 23 move in the same direction and synchronously, when the light-shielding plate 3 blocks the interference light during its movement, the light-shielding sheet 23 also simultaneously blocks the photosensitive element 6 illuminated by the interference light. After the photosensitive element 6 is blocked, the drive mechanism 4 is closed, so that the light-shielding plate 3 and the light-shielding sheet 23 remain in the blocking position. When the external interference light changes and shines on the photosensitive element 6 in other positions, the above process continues, eventually causing the light-shielding plate 3 and the light-shielding sheet 23 to block the illuminated photosensitive element 6, thereby causing the light-shielding plate 3 to block the machine vision inspection system, ensuring that the external interference light will not affect the quality of visual imaging. The entire process is fully automatic and requires no manual operation.

[0028] like Figure 1 and Figure 2 As shown, to ensure the stability of the light-blocking effect of the light-blocking plate, the light-blocking plate 3 is an arc-shaped light-blocking plate, and the arc axis of the arc-shaped light-blocking plate is the same as the swing axis of the swing frame 2.

[0029] like Figure 1 and Figure 2 As shown, in order to improve the stability of the light-blocking effect of the light-blocking plate, the light-blocking plate 23 is an arc-shaped light-blocking plate, and the arc axis of the arc-shaped light-blocking plate is the same as that of the arc-shaped mounting plate 5.

[0030] like Figure 1 and Figure 2 As shown, to increase the applicability, the U-shaped mounting bracket 1 and the connecting shaft 21 are provided with an annular guide groove 11 at the corresponding positions on the outer periphery. The arc-shaped mounting plate 4 is slidably set in the annular guide groove 11, so that the installation angle of the shading device can be freely adjusted.

[0031] like Figure 1 and Figure 2 As shown, to ensure the response speed of the light-shielding device, the photosensitive element 6 is one of a photoresistor, a photodiode, and a phototransistor.

[0032] like Figure 1 and Figure 2 As shown, to facilitate the rotation of the connecting shaft, a balance bar 7 is connected to the side of the connecting shaft 21 away from the light shield 3. The end of the balance bar 7 is detachably equipped with a counterweight 8 to balance the forces on both sides of the connecting shaft 21 and reduce rotational resistance.

[0033] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A machine vision inspection light shielding device, characterized by: The utility model relates to a light shielding device, including U type mounting frame (1) and swing frame (2), the front end of swing frame (2) is equipped with light shield (3), the rear end of swing frame (2) is equipped with connecting shaft (21), connecting shaft (21) is rotatably connected with the open end of U type mounting frame (1), be equipped with drive mechanism (4) on U type mounting frame (1), drive mechanism (4) is transmission connection with connecting shaft (21), the periphery of connecting shaft (21) is equipped with the arc mounting plate (5) with same center of circle on U type mounting frame (1), the outside of arc mounting plate (5) is evenly equipped with a plurality of photosensitive elements (6), photosensitive element (6) is as control switch and is electrically connected with drive mechanism (4), the end of connecting shaft (21) is arranged the connecting rod (22) along the setting direction of swing frame (2), the end of connecting rod (22) is equipped with light shield (23) along the axial direction of connecting shaft (21), light shield (23) can shield the front of photosensitive element (6) on the corresponding side of light shield (3).

2. The machine vision inspection light shielding device according to claim 1, wherein: The light shield (3) is an arc-shaped light shield, and the arc center of the arc-shaped light shield is the same as the swing axis of the swing frame (2).

3. The machine vision inspection light shielding device according to claim 1, wherein: The light shield (23) is an arc-shaped light shield, and the arc center of the arc-shaped light shield is the same as the arc center of the arc-shaped mounting plate (5).

4. The machine vision inspection light shielding device according to claim 1, wherein: The U-shaped mounting frame (1) is provided with a ring-shaped guide groove (11) at a position corresponding to the outer periphery of the connecting shaft (21), and the arc-shaped mounting plate (5) is slidably arranged in the ring-shaped guide groove (11).

5. The machine vision inspection light shielding device according to claim 1, wherein: The photosensitive element (6) is one of a photosensitive resistor, a photodiode, and a phototransistor.

6. The machine vision inspection light shielding device according to claim 1, wherein: The connecting shaft (21) is connected to a balance bar (7) on the side away from the light shield (3), and the end of the balance bar (7) is detachably provided with a counterweight (8).

Images