LED lamp strip for visual detection and detection station constructed by using LED lamp strip

Abstract

The utility model provides an LED lamp strip for visual inspection and a detection station constructed by using the LED lamp strip, the LED lamp strip is in an arch shape, an arch door shape or an n shape, and the LED lamp strip comprises a shell, an LED light source, a reflector and a dodging sheet; the shell is provided with a semi-closed inner cavity, the LED light source is attached to the surface of the inner cavity, and lamp beads arranged at equal intervals are distributed on the LED light source. A plurality of supporting plates are further fixed to the surface of the inner cavity, the supporting plates are distributed on the left side and the right side of the LED light source and used for fixing the reflector to the periphery of the LED light source, and the fixed reflector is perpendicular to the LED light source. The dodging piece is fixed to the opening side of the inner cavity, and the installed dodging piece, the installed light reflecting piece and the installed LED light source form a closed cavity. The lamp strip in the design adopts a splicing-free design mode and is suitable for a mirror surface / mirror surface-like object detection station, and efficient and high-precision visual measurement of the mirror surface / mirror surface-like object can be realized by adopting the detection station constructed by the LED lamp strip in the design.

Description

Technical Field

[0001] The utility model relates to the field of light source design, and particularly relates to an LED light strip for visual inspection and an inspection station constructed by using the same. Background Technique

[0002] During the visual inspection process, the light source is a common auxiliary device, which is used for supplementary lighting or participating in visual inspection. In the visual inspection station for mirror / similar mirror objects, the light source projects a strip of light onto the surface of the object to be measured, and the visual sensor collects the image of the light strip. At present, for the visual inspection of mirror / similar mirror objects, most of them use spliced light sources. For example, a lighting device for automobile paint surface inspection proposed in the patent document CN219828672U uses magnetic attraction to splice multiple light sources to form a door frame-shaped light source device. However, since the light source is spliced, there will be the following problems: scattered layout, obvious splicing partitions, low brightness and uniformity. Furthermore, it affects the image quality collected by the visual sensor and reduces the detection accuracy. Summary of the Invention

[0003] In order to solve the above technical problems, the utility model provides an LED light strip for visual inspection and an inspection station constructed by using the same. The light strip in this design adopts a non-spliced design method, and all the light is reflected by the reflective sheet, which has the characteristics of high brightness and uniform brightness; it is suitable for the inspection station of mirror / similar mirror objects to assist the visual sensor to complete the measurement. The inspection station constructed by using the LED light strip in this design can realize efficient and high-precision visual measurement of mirror / similar mirror objects.

[0004] The technical solution is as follows:

[0005] An LED light strip for visual inspection, the LED light strip is in an arch shape, an archway shape, a "7" shape or a "冂" shape, and it includes a housing, an LED light source, a reflective sheet and a light homogenizing sheet;

[0006] The housing is provided with a semi-closed inner cavity, the LED light source is attached to the surface of the inner cavity, and lamp beads are arranged at equal intervals on it;

[0007] A plurality of support plates are further fixed on the surface of the inner cavity, and the plurality of support plates are distributed on the left and right sides of the LED light source, and are used to fix the reflective sheet around the LED light source. After fixing, the reflective sheet is perpendicular to the placement surface of the LED light source;

[0008] The light homogenizing sheet is fixed on the opening side of the inner cavity, and after installation, the light homogenizing sheet, the reflective sheet and the LED light source form a closed cavity.

[0009] Preferably, a convex surface is provided in the inner cavity, the inner surface of the convex surface is used to arrange the LED light source, and the outer surface is provided with heat dissipation fins.

[0010] Preferably, the inner cavity is provided with a slot on the side wall of the opening side, and the slot is used to install a light homogenizing sheet;

[0011] One or more cover plates are also provided on the outside of the light homogenizer. The cover plates are distributed around the light homogenizer and do not block the middle area of ​​the light homogenizer. The cover plates are fixed on the housing and are used to press the light homogenizer.

[0012] Preferably, a gap is left between the support plate and the inner wall of the shell, and the gap is used to store cables.

[0013] Furthermore, a wire outlet hole is provided at the end of the shell.

[0014] The utility model also discloses a detection station constructed by using the above-mentioned LED light strip for visual detection, wherein the detection station comprises a light shielding shed, a gantry and a camera;

[0015] The sunshade shed is fixed on the ground, and includes vertical plates arranged on the left and right sides and a top plate fixed on the vertical plates on both sides, and the vertical plates and the top plate are both opaque plates;

[0016] The gantry is used to install the LED light strip, which is fixedly arranged inside the sunshade shed, and includes vertical poles arranged on the left and right sides and cross bars fixed on the vertical poles; when the gantry is placed, the cross bars are perpendicular to the vertical plates;

[0017] The camera is fixed around the LED light strip and located inside the sunshade.

[0018] Preferably, the inner surfaces of the vertical plates and the top plate are black plates, and a shielding curtain is provided between the vertical plates on both sides.

[0019] Furthermore, there are 4 to 30 cameras, which are evenly distributed on the gantry.

[0020] The utility model provides an LED light strip for visual inspection, wherein the LED light strip adopts a non-splicing design; a light homogenizer (seamless diffuse reflection plate), a reflector and an LED light source form a closed cavity, and the reflector is used to fully reflect the light diverged from both sides of the light source onto the light homogenizer, thereby achieving a focusing effect; at the same time, the LED light source adopts LED lamp beads arranged in a high-power uniform array, so that the light emitted by the light strip has the characteristics of high brightness and high uniformity, so that the light strip projected on the object to be measured can better meet the detection requirements of mirror / mirror-like objects.

[0021] In addition, this design also designs heat dissipation fins on the outside of the LED light source bonding surface to prevent the LED light source from overheating.

[0022] The inspection station constructed using the LED light strip in this design can achieve efficient and high-precision visual measurement of mirror / mirror-like objects. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of the LED light strip in the specific implementation manner;

[0024] Figure 2 It is a schematic diagram of the disassembled structure of the LED light strip in the specific implementation manner;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the LED light strip in the specific implementation manner;

[0026] Figure 4 It is a schematic diagram of installing the LED light strip on the gantry in the specific implementation manner;

[0027] Figure 5 It is a schematic diagram of the detection station in the specific implementation manner Specific Implementation Manner

[0028] The technical solution of the present utility model will be described in detail below in conjunction with the drawings and specific implementation manners.

[0029] An LED light strip for visual inspection, as Figure 1-3 shown, the LED light strip is in an arch shape, an archway shape, a "7" shape or a "冂" shape, and it includes a housing 1, an LED light source 3, a reflective sheet 8 and a light homogenizing sheet 6;

[0030] The housing is provided with a semi-closed inner cavity, and the LED light source 3 is attached to the surface of the inner cavity, on which the lamp beads 301 arranged at equal intervals are distributed; for example, the LED light source 3 is attached to the bottom surface of the inner cavity by means of a thermally conductive double-sided tape;

[0031] A plurality of support plates 14 are also fixed on the surface of the inner cavity, and the plurality of support plates are distributed on the left and right sides of the LED light source, and they are used to fix the reflective sheet 8 around the LED light source, and the fixed reflective sheet 8 is perpendicular to the placement surface of the LED light source 3;

[0032] The light homogenizing sheet 6 is fixed on the opening side of the inner cavity, and after installation, the light homogenizing sheet 6, the reflective sheet 8 and the LED light source 3 form a closed cavity.

[0033] Among them, the reflective sheet 8 can reflect all the light emitted by the LED light source 3 onto the light homogenizing sheet 6, realizing the function of light concentration and maintaining the high brightness of the LED light strip.

[0034] For the convenience of heat dissipation, as Figure 2 shown, there is a raised surface in the inner cavity, and the inner surface of the raised surface is used to arrange the LED light source 3, and the outer surface is provided with heat dissipation fins 4.

[0035] In order to fasten the light homogenizing sheet, a card slot is provided on the side wall of the inner cavity at the opening side, and the card slot is used to install the light homogenizing sheet 6;

[0036] One or more cover plates 7 are also provided on the outside of the light homogenizer 6. The cover plates 7 are distributed around the light homogenizer 6 and do not block the middle area of ​​the light homogenizer. The cover plates 7 are fixed to the housing to press the light homogenizer 6 and limit its longitudinal movement.

[0037] In order to facilitate wiring, Figure 2 , 3 As shown, there is a gap between the support plate and the inner wall of the shell, and the gap is used to store cables. A wire outlet hole is provided at the end of the shell.

[0038] The utility model also discloses a detection station constructed by using the above-mentioned LED light strip for visual detection, such as Figure 5 As shown, the inspection station includes a light shielding shed 5, a gantry 9 and a camera;

[0039] The sunshade shed 5 is fixed on the ground, and includes vertical plates 10 arranged on the left and right sides and a top plate 11 fixed on the vertical plates on both sides, and both the vertical plates and the top plate are opaque plates;

[0040] Gantry 9 is used to install LED light strips (such as Figure 4 ), which is fixedly arranged inside the sunshade awning, including upright poles 12 arranged on the left and right sides and a cross bar 13 fixed on the upright poles; when the gantry is placed, the cross bar 13 is perpendicular to the upright plate 10;

[0041] The cameras are fixed around the LED light strip and located inside the light shielding shed. Generally, there are 4 to 30 cameras, which are evenly distributed on the gantry 9.

[0042] In order to further avoid interference from external ambient light, the inner surfaces of the vertical plates and the top plate are black plates, and shielding curtains are also provided between the vertical plates 10 on both sides, that is, shielding curtains are provided at the front and back of the sunshade shed.

[0043] During the inspection, the object to be inspected passes through the interior of the light shielding shed 5, and the LED light strip projects a light strip onto the surface of the object to be inspected, and the camera collects the surface image of the object to be inspected after the light strip is projected.

[0044] When using, the size of the LED light strip and the number of cameras should be reasonably selected according to the actual size of the object to be tested. Ensure that the object to be tested can pass through the LED light strip and multiple cameras can capture the entire area to be tested. For example, when the object to be tested is a car body in white, the length of the LED light strip is about 4 meters, and there are 8 to 20 cameras.

[0045] The foregoing description of the specific exemplary embodiments of the detection system is presented for the purpose of illustration and description. The foregoing description is not intended to be exhaustive, nor is it intended to limit the detection system to the precise form disclosed, and obviously, many changes and variations are possible in light of the above teachings.

Claims

1. An LED light strip for visual inspection, characterized in that: The LED strip is in an arch shape, an archway shape, a "7" shape or a "冂" shape, and includes a housing (1), an LED light source (3), a reflector (8) and a light homogenizing sheet (6); The housing is provided with a semi-closed inner cavity, and the LED light source (3) is attached to the surface of the inner cavity, on which lamp beads (301) are arranged at equal intervals; A plurality of support plates (14) are further fixed on the surface of the inner cavity. The plurality of support plates are distributed on the left and right sides of the LED light source (3) and are used to fix the reflector (8) around the LED light source. After being fixed, the reflector (8) is perpendicular to the placement surface of the LED light source (3); The light homogenizing sheet (6) is fixed on the opening side of the inner cavity. After installation, the light homogenizing sheet (6), the reflector (8) and the LED light source (3) form a closed cavity.

2. The LED light strip for visual inspection according to claim 1, characterized in that: A convex surface is provided in the inner cavity. The inner surface of the convex surface is used to arrange the LED light source (3), and the outer surface is provided with heat dissipation fins (4).

3. The LED light strip for visual inspection according to claim 1, characterized in that: A clamping groove is provided on the side wall of the inner cavity at the opening side, and the clamping groove is used to install the light homogenizing sheet (6); One or more cover plates (7) are further provided on the outer side of the light homogenizing sheet (6). The cover plates (7) are distributed around the light homogenizing sheet (6) and do not block the middle area of the light homogenizing sheet. They are fixed on the housing and are used to press the light homogenizing sheet (6).

4. The LED light strip for visual inspection according to claim 1, characterized in that: A gap is left between the support plate and the inner wall of the housing, and the gap is used to store cables.

5. The LED light strip for visual inspection according to claim 1, characterized in that: A wire outlet hole is provided at the end of the housing.

6. An inspection station constructed using the LED light strip for visual inspection as claimed in any one of claims 1 to 5, characterized in that: The detection station includes a light-shielding shed (5), a gantry (9) and a camera; The light-shielding shed (5) is fixed on the ground and includes vertical plates (10) arranged on the left and right sides and a top plate (11) fixed on the two vertical plates. The vertical plates and the top plate are both opaque plates; The gantry (9) is used to install the LED strip and is fixedly arranged inside the light-shielding shed. It includes vertical rods (12) arranged on the left and right sides and a cross bar (13) fixed on the vertical rods. When the gantry is placed, the cross bar (13) is perpendicular to the vertical plate (10); The camera is fixed around the LED strip and is located inside the light-shielding shed.

7. The detection station according to claim 6, characterized in that: The inner surfaces of the vertical plates and the top plate are black plates, and a shielding curtain is further provided between the two vertical plates (10).

8. The detection station as claimed in claim 6, characterized in that: There are 4 to 30 cameras, which are evenly distributed on the gantry (9).

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