A camera that detects the true edge of connector terminals

Abstract

The present invention discloses a camera for detecting the true edge of a connector terminal, comprising a fixing bracket, wherein one side of the fixing bracket is provided with a product fixing mechanism, a coaxial light source, a lens and a camera in sequence from top to bottom, the product fixing mechanism comprises an LED light strip, a lens, a first reflector and a second reflector, a camera is provided on the lower side of the product fixing mechanism, a lens is provided on one side of the camera, and a product positioning fixture is provided between the product fixing mechanism and the lens. The present invention adopts a professionally designed light source solution, wherein light is emitted from a ring-shaped LED light strip, becomes horizontally parallel light after passing through the lens, and then is reflected by the first reflector and the second reflector and irradiated onto the terminal. Since the light is relatively parallel, the height of the light source is controlled to ensure that the terminal head is illuminated, while the raised buckle on the terminal is not illuminated, so that the true edge under the rounded corner of the terminal can be illuminated without irradiating the curved buckle, thereby avoiding interference from the reflection of the raised buckle, solving the problem of not being able to capture the true edge during detection, and making the device have the best clarity and accuracy of visual detection.

Description

Technical Field

[0001] The present invention relates to the field of automated detection technology, and in particular to a camera for detecting the real edge of a connector terminal. Background Art

[0002] With the development of the automated inspection industry, the environments and complexity of product inspection locations are becoming increasingly complex. In response to customer demand, we now need to perform visual inspection on connector terminals. The connector provided by the customer has a socket with four terminals in a groove. The terminal heads (bottoms) have rounded corners and a raised snap-fit structure in the middle of the terminals. During inspection, we require the actual edge of the terminal heads to be grasped, and the width of the heads must be smaller than the raised snap-fit structure.

[0003] However, during the current inspection process, it was found that due to the reflection generated by the raised snap-on structure, the CCD camera could only see the flat surface on the rounded corner of the terminal but could not see the real edge. Currently, there is no suitable light source on the market that can meet the optical requirements of visual inspection. Summary of the Invention

[0004] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a camera for detecting the real edge of the connector terminal. It adopts a professionally designed light source solution, which can illuminate the real edge under the rounded corner of the terminal without illuminating the curved buckle, thereby avoiding interference caused by the protruding buckle.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A camera for detecting the real edge of a connector terminal, which is used to detect the connector terminal, includes a fixing bracket, and one side of the fixing bracket is provided with a product fixing mechanism, a coaxial light source, a lens and a camera in sequence from top to bottom. The product fixing mechanism has a central through hole that passes through the upper and lower parts, and the connector terminal is placed at the upper end of the central through hole of the product fixing mechanism. The upper end of the central through hole of the product fixing mechanism has light that is horizontally projected toward the connector terminal.

[0006] More specifically, the product fixing mechanism includes a fixed shell and an LED light strip, a lens, a first reflector and a second reflector arranged in the fixed shell. The fixed shell includes a lower shell, an upper shell and a side wall fixedly connected to the lower shell and the upper shell. The middle part of the lower shell is fixedly connected to an upwardly protruding inner cylinder, and the inner cylinder has a central cavity that passes through the upper and lower parts. The center of the upper shell is provided with an outer cylinder that is adapted to the inner cylinder, a first interlayer cavity is provided between the inner cylinder and the outer cylinder, and a second interlayer cavity is provided between the lower shell and the upper shell. The upper end of the outer cylinder has a first opening that is connected to the central cavity, and a light-transmitting gap that is connected to the first interlayer cavity is provided between the upper end of the inner cylinder and the upper end of the outer cylinder. The first reflector is provided on the lower side of the first interlayer cavity, and the second reflector is provided directly above the first reflector and adjacent to the light-transmitting gap. The lens surrounds the first reflector and is arranged in the second interlayer cavity. The LED light strip is arranged around the outside of the lens and fixedly mounted on the inner side of the side wall.

[0007] More specifically, the LED light strip and the lens are both arranged in a ring shape.

[0008] More specifically, the first reflector and the second reflector both have a reflective slope of 45 degrees.

[0009] More specifically, a position adjustment plate is provided on one side of the fixing bracket, and the product fixing mechanism is connected to the fixing bracket via the position adjustment plate.

[0010] More specifically, a camera fixing piece is provided on one side of the fixing bracket, and the camera and the lens are connected to the fixing bracket via the camera fixing piece.

[0011] More specifically, heat dissipation silica gel is provided between the LED light strip and the side wall.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention adopts a professionally designed light source solution. Light is emitted from a ring-shaped LED light strip, becomes horizontally parallel light after passing through a lens, and then illuminates the terminal after being reflected by a first reflector and a second reflector. Because the light is relatively parallel, the height of the light source is controlled to ensure that the terminal head is illuminated, while the raised buckle on the terminal is not illuminated. The real edge under the rounded corner of the terminal can be illuminated without illuminating the curved buckle, avoiding interference from the reflection of the raised buckle, and solving problems such as the inability to capture the real edge during detection, so that the equipment has the best clarity and accuracy of visual detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0015] Figure 2 Schematic diagram of the structure of the connector to be tested

[0016] Figure 3 Schematic diagram of the structure of the connector terminal to be tested

[0017] Figure 4 It is a schematic structural diagram of the cross section of the present invention;

[0018] Figure 5 It is a structural schematic diagram of the cross section of the fixing mechanism of the product of the present invention;

[0019] Figure 6 A diagram of the light path within the product's mounting structure. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-6 An embodiment of a camera for detecting the true edge of a connector terminal is provided. The camera is used to detect a connector terminal 20. A CCD camera is used to photograph the outline of the terminal 20. By comparing the images, the terminal 20 is checked for defects. The embodiment includes a fixing bracket 1. A product fixing mechanism 2, a coaxial light source 12, a lens 7, and a camera 6 are sequentially arranged on one side of the fixing bracket 1 from top to bottom.

[0022] The product fixing mechanism 2 includes a fixing housing, an LED light strip 21, a lens 3, a first reflector 4 and a second reflector 5;

[0023] The fixed shell includes a lower shell 8 and an upper shell 9 arranged on the upper side of the lower shell 8. The lower shell 8 and the upper shell 9 are fixedly connected by a side wall 22. The middle part of the lower shell 8 is fixedly connected with an inner cylinder 10 that protrudes upward. The inner cylinder 10 has a central cavity 100 that runs through the upper and lower parts. The middle part of the upper shell 9 is provided with an outer cylinder 11 that is adapted to the inner cylinder 10. A first interlayer cavity 101 is provided between the inner cylinder 10 and the outer cylinder 11. A second interlayer cavity 102 is provided between the lower shell 8 and the upper shell 9. The upper end of the outer cylinder 11 has a first opening 103 that is connected to the central cavity 100. A light-transmitting gap 104 that is connected to the first interlayer cavity 101 is provided between the upper end of the inner cylinder 10 and the upper end of the outer cylinder 11. The first reflector The mirror 4 is arranged on the lower side of the first interlayer cavity 101, the second reflector 5 is arranged directly above the first reflector 4 and adjacent to the light-transmitting gap 104, the lens 3 surrounds the first reflector 4 and is arranged in the second interlayer cavity 102, the LED light strip 2 is arranged around the outside of the lens 3 and is fixedly installed on the inside of the side wall 22. In order to facilitate heat dissipation, the LED light strip 22 and the side wall 22 are filled with heat-dissipating silicone. The light is emitted from the LED light strip 2, becomes parallel light in the horizontal direction after passing through the lens 3, and then reflected by the first reflector 4 and the second reflector 5, and then shines on the terminal from the light-transmitting gap 104. Because the light is relatively parallel, the height of the light source is controlled to ensure that the terminal head is illuminated, while the raised buckle part is not illuminated, and no reflection occurs, which affects the visual inspection of the terminal head.

[0024] In one aspect of this embodiment, the LED light strip 2 and the lens 3 are both arranged in a ring shape, and the LED light strip 2 and the lens 3 are both arranged between the lower shell 8 and the upper shell 9. The ring-shaped LED light strip 2 emits light, which passes through the ring-shaped lens 3 and becomes parallel light in a nearly horizontal direction.

[0025] In one aspect of this embodiment, the position adjustment plate 13 on one side of the fixing bracket 1 plays a role in adjusting the vertical position of the product fixing mechanism.

[0026] In one aspect of this embodiment, the camera fixing member 14 provided on one side of the fixing bracket 1 serves to fix and support the camera 6 and the lens 7 .

[0027] The coaxial light source 12 provides more uniform illumination than traditional light sources, improving the accuracy and reproducibility of machine vision. The coaxial light source 12 can highlight the unevenness of the object surface and overcome the interference caused by surface reflection. It is mainly used to detect bumps, scratches, cracks and foreign objects on the flat and smooth surface of the object.

[0028] The working principle of the present invention is as follows: the camera for detecting the real edge of the connector terminal 20, in which the annular LED light strip 21 emits light, which passes through the annular lens 3 and becomes parallel light in a nearly horizontal direction. After passing through the first reflector 4, it is reflected upward in a 90-degree vertical direction. After being reflected by the second reflector 5, it becomes a parallel light source in a 90-degree horizontal direction again. It illuminates the head of the terminal 20 through the light-transmitting gap 104, and the real edge of the terminal head can be illuminated. The light reflecting the real edge of the terminal finally passes downward through the central cavity 100, and the coaxial light source lens 3 is captured by the camera. In this solution, all electrical equipment are powered by an external power supply.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A camera for detecting the true edge of a connector terminal, for detecting a connector terminal (20), comprising a fixing bracket (1), characterized in that: A product fixing mechanism (2), a coaxial light source (12), a lens (7) and a camera (6) are sequentially provided on one side of the fixing bracket (1) from top to bottom. The product fixing mechanism (2) has a central through hole extending vertically therethrough. The connector terminal (20) is placed at the upper end of the central through hole of the product fixing mechanism (2). The upper end of the central through hole of the product fixing mechanism (2) has light that is horizontally directed toward the connector terminal (20). The product fixing mechanism (2) comprises a fixed shell and an LED light strip (21), a lens (3), a first reflector (4) and a second reflector (5) arranged in the fixed shell. The fixed shell comprises a lower shell (8), an upper shell (9) and a side wall (22) fixedly connected to the lower shell (8) and the upper shell (9). An inner cylinder (10) protruding upward is fixedly connected to the middle of the lower shell (8). The inner cylinder (10) has a central cavity (100) that passes through from top to bottom. An outer cylinder (11) that matches the inner cylinder (10) is arranged at the center of the upper shell (9). A first interlayer cavity (101) is arranged between the inner cylinder (10) and the outer cylinder (11). The lower shell (8) and the upper shell are fixedly connected to each other. (9), a second interlayer cavity (102) is provided between the upper end of the outer tube (11), a first opening (103) communicating with the central cavity (100), a light-transmitting gap (104) communicating with the first interlayer cavity is provided between the upper end of the inner tube (10) and the upper end of the outer tube (11), the first reflector (4) is provided on the lower side of the first interlayer cavity (101), the second reflector (5) is provided directly above the first reflector (4) and adjacent to the light-transmitting gap (104), a lens (3) surrounds the first reflector (4) and is provided in the second interlayer cavity (102), the LED light strip (21) surrounds the outer side of the lens (3) and is fixedly mounted on the inner side of the side wall (22); The LED light strip (21) and the lens (3) are both arranged in a ring shape; The first reflector (4) and the second reflector (5) both have a 45-degree reflective slope.

2. The camera for detecting the true edge of a connector terminal according to claim 1, characterized in that: A position adjustment plate (13) is provided on one side of the fixing bracket (1), and the product fixing mechanism (2) is connected to the fixing bracket (1) via the position adjustment plate (13).

3. The camera for detecting the true edge of a connector terminal according to claim 1, characterized in that: A camera fixing member (14) is provided on one side of the fixing bracket (1), and the camera (6) and the lens (7) are connected to the fixing bracket (1) via the camera fixing member (14).

4. The camera for detecting the true edge of a connector terminal according to claim 1, characterized in that: Heat dissipation silica gel is provided between the LED light strip (21) and the side wall (22).

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