CN220355281U

CN220355281U - Annular light source device

Info

Publication number: CN220355281U
Application number: CN202321055464.3U
Authority: CN
Inventors: 刘圣祥
Original assignee: Hefei Tuxun Electronic Technology Co ltd
Current assignee: Hefei Tuxun Electronic Technology Co ltd
Priority date: 2023-05-04
Filing date: 2023-05-04
Publication date: 2024-01-16
Anticipated expiration: 2033-05-04

Abstract

The utility model discloses an annular light source device, and belongs to the technical field of visual detection. Aiming at the problems that when the annular visual field is larger, the annular light source irradiation is uneven, the annular light source irradiation angle is not enough and the like in the prior art, the utility model provides an annular light source device, which comprises LED (light emitting diode) lamp beads and light source fixing parts, wherein the light source fixing parts are in honeycomb holes, the two ends of the light source fixing parts are circular rings with different opening sizes, a plurality of fixing holes with the same size are distributed on the light source fixing parts, the LED lamp beads are arranged in the fixing holes, and the fixing holes are used for fixing the irradiation angles of the LED lamp beads, so that the irradiation angles of the LED lamp beads cannot deviate, the annular light source irradiation uniformity is ensured, and the irradiation angles of the annular light source are increased.

Description

Annular light source device

Technical Field

The utility model relates to the technical field of visual inspection, in particular to an annular light source device.

Background

At present, the domestic machine vision detection technology is widely applied to quality detection, and the annular light source is one of the series of light sources commonly used in machine vision. The annular light source is in a shape of an annular light source which emits light at a certain inclined angle after being formed into a cone shape by the LED array, irradiates the surface of an object to be tested, and illuminates a small area by a diffuse reflection mode, so that the edge and the height change of the object to be tested can be highlighted, the details which are difficult to see originally are highlighted, and the annular light source is widely applied to scenes such as edge detection, metal surface lettering, damage detection and the like.

In the prior art, the annular light source mainly comprises a shell and an LED, the LED is fixed by the shell to form certain characteristic angles, and then the product is irradiated by the light source, so that the software can realize visual detection after image extraction processing. However, when the detected product is large, defects are caused, such as that when the annular visual field is large, the image extracted by the software is not uniform enough, and the irradiation angle of the annular light source is insufficient.

Through searching, chinese patent application, application number 202011639838.7, publication day 2021, month 4 and 16 discloses an annular light source capable of conveniently adjusting the light emitting angle. The utility model comprises the following steps: the device comprises a first shell, a second shell, a reflecting lens, an adjusting mechanism and a light source, wherein the reflecting lens, the adjusting mechanism and the light source are arranged in a containing cavity formed by the first shell and the second shell, the first shell and the second shell are movably connected, and the adjusting mechanism is used for adjusting the axial distance between the reflecting lens and the light source. The utility model can conveniently adjust the light emitting angle according to the actual light effect requirement, but the utility model does not consider the problem that the annular light source is uneven when the annular visual field is large in the visual detection process.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems that when the annular visual field is large, the annular light source is uneven in irradiation, the annular light source is insufficient in irradiation angle and the like in the prior art, the utility model provides the annular light source device which is characterized in that LED lamp beads are fixedly arranged in the fixing holes of the light source fixing parts, so that the annular light source is uniformly irradiated, and the irradiation angle of the annular light source is increased.

2. Technical proposal

The aim of the utility model is achieved by the following technical scheme.

An annular light source device comprises LED lamp beads and light source fixing parts; the LED lamp bead is characterized in that the light source fixing part is in a honeycomb hole shape, two ends of the light source fixing part are circular rings with different opening sizes, a plurality of fixing holes with the same size are distributed on the inner wall of the light source fixing part, the fixing holes are small holes, and the LED lamp bead is arranged in the fixing holes.

Further, the annular light source device further comprises a light source shell, the light source shell is of a circular annular structure, two ends of the light source shell are annular with the same opening size, and the light source fixing part is arranged in the containing cavity of the light source shell.

Further, the annular light source device further comprises a circuit board, and the circuit board is connected with the LED lamp beads.

Further, the annular light source device further comprises a light source cover plate, wherein the light source cover plate is an annular cover plate; the central line of the light source cover plate and the central line of the light source shell are on the same straight line; the radius of the light source cover plate is the same as that of the light source shell.

Further, the light source housing is connected with one end of the light source cover plate through a circuit board to form the annular light source device.

Further, the annular light source device further comprises a waterproof connector, the waterproof connector is arranged at the other end of the light source cover plate, and the waterproof connector is used for connecting an LED lamp bead outgoing line with a power supply.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

according to the annular light source device, the LED lamp beads are fixedly arranged in the fixing holes of the light source fixing parts, so that the irradiation angles of the LED lamp beads cannot deviate, the annular light source device can be uniformly irradiated on a detected object during detection, meanwhile, the irradiation angles of the annular light source are more, the detected object can be clearly and rapidly detected, the detection time is effectively saved, and the detection efficiency is greatly improved.

Drawings

FIG. 1 is an exploded view of a ring light source device according to the present embodiment;

FIG. 2 is a front view of the annular light source device of the present embodiment;

FIG. 3 is a top view of the annular light source device of the present embodiment;

FIG. 4 is a schematic view showing angles of each channel of the annular light source according to the present embodiment;

FIG. 5 is a schematic view of a hemispherical object illuminated by each layer of light source of the annular light source of the present embodiment;

FIG. 6 is a high angle schematic view of the ring light source of the present embodiment;

fig. 7 is a low-angle schematic view of the ring light source according to the present embodiment.

The reference numerals in the figures illustrate: 1. LED lamp beads; 2. a light source housing; 3. a light source fixing part; 31. a fixing hole; 4. a circuit board; 5. a light source cover plate; 6. a waterproof joint; 7. hemispherical object to be detected.

Detailed Description

The utility model will now be described in detail with reference to the drawings and the accompanying specific examples.

Examples

In the prior art, for the annular light source device, the LED lamp beads 1 are mainly fixed through the printed circuit board (Printed Circuit Boards, PCB), but the printed circuit board has the problem of bending, so that the irradiation angle of the LED lamp beads 1 is deviated, the irradiation angle of the annular light source is uneven, and meanwhile, the irradiation angle of the annular light source is also reduced.

As shown in fig. 1 to 3, an annular light source device is provided in this embodiment. The annular light source device comprises an LED lamp bead 1 and a light source fixing part 3. In this embodiment, the light source fixing part 3 is in a honeycomb hole shape, two ends of the light source fixing part 3 are circular rings with different opening sizes, and a plurality of fixing holes 31 with the same size are distributed on the light source fixing part 3, and the fixing holes 31 are circular small holes. The LED lamp beads 1 are fixedly installed in the fixing holes 31, the LED lamp beads 1 are fixed through the fixing holes 31, the LED lamp beads 1 cannot move in the fixing holes 31, and therefore the irradiation angles of the LED lamp beads 1 cannot deviate, and the irradiation angles of the annular light sources are guaranteed to be uniform. In this embodiment, the selected LED lamp beads 1 are F5 LED lamp beads with a diameter of 5 mm.

Further, the annular light source device provided in this embodiment further includes a light source housing 2, a circuit board 4, a light source cover plate 5, and a waterproof joint 6. Specifically, the light source housing 2 is a circular ring structure, two ends of the light source housing 2 are circular rings with the same opening size, and the light source fixing part 3 is arranged in the accommodating cavity of the light source housing 2. The circuit board 4 is connected with the LED lamp beads 1, and the circuit board 4 provides power to the LED lamp beads 1 to ensure the work of the LED lamp beads 1. In this embodiment, the circuit board 4 includes an R321LB circuit board, an R322LB circuit board, an R323LB circuit board, and the like. The light source cover plate 5 is a circular ring cover plate, the central line of the light source cover plate 5 and the central line of the light source housing 2 are on the same straight line, and the radius of the light source cover plate 5 is the same as the radius of the light source housing 2. The light source housing 2 is connected to one end of the light source cover plate 5 through the circuit board 4, and the light source housing 2 is connected to the light source cover plate 5 to form the annular light source device according to the embodiment. The other end of the light source cover plate 5 is connected with a waterproof connector 6, and the waterproof connector 6 is used for connecting the outgoing line of the LED lamp beads 1 with a power supply. The LED lamp beads 1 are single-color lamp beads or multi-color lamp beads. In this embodiment, preferably, the LED lamp beads are multi-color lamp beads, including red LED lamp beads, blue LED lamp beads, and white LED lamp beads.

As shown in fig. 4, the LED lamp beads 1 are fixedly installed in the fixing holes 31 of the light source fixing part 3, and the ring-shaped light source device is horizontally placed. When the LED lamp beads 1 are connected with the circuit board 4 and electrified, sixteen layers of light source channels are generated by taking the center of the light source fixing part 3 as an origin, and the angles of each layer of light source channel and the horizontal plane are different. In this embodiment, the angles between each layer of light source channel and the horizontal plane are sequentially: 3.4 °, 7 °, 10.7 °, 14.4 °, 18 °, 21.7 °, 25.3 °, 29 °, 32.7 °, 36.3 °, 40 °, 43.7 °, 47.3 °, 51 °, 54.6 °, 58.3 °. In addition, each layer of light source channel has independent channel line connection, can control the switch of LED lamp pearl 1 alone, simultaneously, the LED lamp pearl 1 on each layer of light source channel can be monochromatic LED lamp pearl or polychrome LED lamp pearl. Sixteen layers of light source channels passing through the annular light source can irradiate each position of the detected object, so that the detection efficiency of the detected object is improved. As shown in fig. 5, the hemispherical object 7 is detected by the annular light source device, and when the circuit board 4 is connected with the power supply, the LED lamp beads 1 of each layer of light source channel irradiate on the hemispherical object, so that the hemispherical object 7 can be detected rapidly and clearly.

In the annular light source device provided in this embodiment, as shown in fig. 6, when the irradiation angle a of the LED lamp beads 1 is 58.3 °, the light source of the LED lamp beads 1 with the highest angle of the annular light source device has an irradiation area of a center circle B plus an outer circle C, and it is noted that, because the irradiation angle of the LED lamp beads 1 is close to the center, the brightness of the middle circle B is slightly higher than that of the outer circle C. As shown in fig. 7, when the irradiation angle a ' of the LED lamp bead 1 is 3.4 °, the light source of the LED lamp bead 1 with the lowest angle of the annular light source device has an irradiation area of a center circle B ' plus an outer circle C ', and it is noted that, since the irradiation angle of the LED lamp bead 1 is far from the center, the center circle B ' has a brightness first point than the outer circle C '. Therefore, according to the annular light source device provided by the embodiment, the light source channels with different angles are lightened through the LED lamp beads 1 in the sixteen layers of light source channels, so that the detected objects can be detected rapidly and uniformly.

The annular light source device provided by the embodiment can be used for detecting products such as solder balls, seals, trays (tray) and the like.

Therefore, according to the annular light source device, the LED lamp beads 1 are fixedly arranged in the fixing holes 31 of the light source fixing part 3, so that the irradiation angle of the LED lamp beads 1 cannot deviate, the annular light source device can be ensured to irradiate on a detected object more uniformly during detection, meanwhile, the irradiation angle of the annular light source is more, the detected object can be detected more clearly and rapidly, the detection time is effectively saved, and the detection efficiency is greatly improved.

The foregoing has been described schematically the utility model and embodiments thereof, which are not limiting, but are capable of other specific forms of implementing the utility model without departing from its spirit or essential characteristics. The drawings are also intended to depict only one embodiment of the utility model, and therefore the actual construction is not intended to limit the claims, any reference number in the claims not being intended to limit the claims. Therefore, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical scheme are not creatively designed without departing from the gist of the present utility model, and all the structural manners and the embodiment are considered to be within the protection scope of the present patent. In addition, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" preceding an element does not exclude the inclusion of a plurality of such elements. The various elements recited in the product claims may also be embodied in software or hardware. The terms first, second, etc. are used to denote a name, but not any particular order.

Claims

1. An annular light source device is characterized by comprising LED lamp beads (1) and light source fixing parts (3); the LED lamp is characterized in that the light source fixing part (3) is in a honeycomb hole shape, two ends of the light source fixing part (3) are circular rings with different opening sizes, a plurality of fixing holes (31) with the same size are distributed on the inner wall of the light source fixing part (3), the fixing holes (31) are round small holes, and the LED lamp beads (1) are arranged in the fixing holes (31).

2. The annular light source device according to claim 1, further comprising a light source housing (2), wherein the light source housing (2) is of a circular annular structure, two ends of the light source housing (2) are circular rings with the same opening size, and the light source fixing part (3) is installed in the accommodating cavity of the light source housing (2).

3. The annular light source device according to claim 1, further comprising a circuit board (4), wherein the circuit board (4) is connected to the LED lamp beads (1).

4. A ring-shaped light source device according to claim 3, characterized in that the ring-shaped light source device further comprises a light source cover plate (5), the light source cover plate (5) being a ring-shaped cover plate; the central line of the light source cover plate (5) and the central line of the light source shell (2) are on the same straight line; the radius of the light source cover plate (5) is the same as that of the light source shell (2).

5. An annular light source device according to claim 4, characterized in that the light source housing (2) is connected to one end of a light source cover plate (5) via a circuit board (4) to constitute the annular light source device.

6. The annular light source device according to claim 5, further comprising a waterproof connector (6), wherein the waterproof connector (6) is arranged at the other end of the light source cover plate (5), and the waterproof connector (6) is used for connecting the LED lamp beads (1) to a power supply in a wire-out manner.