Annular stripe light source and detection device

Abstract

The utility model relates to the technical field of light sources, and discloses an annular stripe light source and a detection device. The streak tube is mounted in the mounting hole, and the streak tube is provided with a detection hole; the center line of the striped tube is parallel to the center line of the mounting hole, and the striped tube is provided with strip-shaped shading parts and strip-shaped light-transmitting parts which are alternately arranged; the light-emitting assembly is installed between the shell and the streak tube, and light emitted by the light-emitting assembly penetrates through the streak tube to irradiate the surface of the workpiece to be detected of the detection hole so as to form light and shade alternated stripes on the surface of the workpiece to be detected. According to the annular stripe light source and the detection device, the accuracy of defect detection can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of light sources, in particular to an annular striped light source and a detection device. Background Art

[0002] The current striped light source includes a light-emitting component and a striped plate. The striped plate is provided with a strip-shaped gap for light transmission. The light emitted by the light-emitting component passes through the strip-shaped gap and shines on the workpiece to be detected, so as to form dark stripes on the surface of the workpiece to be detected. The dark stripes can more easily highlight the surface defects of the workpiece to be detected. That is, if there are defects such as depressions and scratches on the surface of the workpiece, the dark stripes at the defect locations will be distorted or deformed, making it easier to be detected by the camera.

[0003] However, in the existing strip light source, the middle of the strip-shaped gap is easily blocked by fine dust or impurities, resulting in distortion and deformation of the dark stripes themselves. In addition, the flow of the workpiece to be detected will drive air flow disturbance, further increasing the possibility of blockage of the strip-shaped gap, thereby reducing the accuracy of defect detection.

[0004] In view of this, it is necessary to design an annular striped light source and a detection device, which can help maintain the accuracy of defect detection.

[0005] The above information is given as background information only to assist in understanding the present disclosure, and it is not determined or admitted whether any of the above content can be used as the prior art relative to the present disclosure. Summary of the Utility Model

[0006] The utility model provides an annular striped light source and a detection device, which can help maintain the accuracy of defect detection.

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] An annular striped light source, comprising:

[0009] A housing having a mounting hole;

[0010] A striped tube installed in the mounting hole, the striped tube having a detection hole; the center line of the striped tube is parallel to the center line of the mounting hole, and the striped tube has alternately arranged strip-shaped light-shielding portions and strip-shaped light-transmitting portions;

[0011] A light-emitting component installed between the housing and the striped tube, and the light emitted by the light-emitting component passes through the strip-shaped light-transmitting portion and irradiates on the surface of the detection hole for the workpiece to be detected, so as to form light and dark alternating stripes on the surface of the workpiece to be detected.

[0012] Optionally, both the strip-shaped light-shielding portion and the strip-shaped light-transmitting portion are parallel to the center line of the mounting hole.

[0013] Optionally, the strip-shaped light-shielding portion is annular, the strip-shaped light-transmitting portion is annular, and both the strip-shaped light-shielding portion and the strip-shaped light-transmitting portion are perpendicular to the center line of the detection hole.

[0014] Optionally, the annular stripe light source further includes a diffusion plate installed between the light-emitting component and the stripe tube;

[0015] The light emitted by the light-emitting component sequentially passes through the diffusion plate and the stripe tube.

[0016] Optionally, the diffusion plate is tubular and sleeved on the outer periphery of the stripe tube.

[0017] Optionally, the light-emitting component includes a circuit board, LED lamp beads are arranged in an array on the circuit board, and the LED lamp beads are installed on one side of the circuit board close to the stripe tube.

[0018] Optionally, the housing is a metal shell, and the circuit board is attached to the shell wall of the housing.

[0019] Optionally, the surface of the strip-shaped light-shielding portion is coated with a light-absorbing layer.

[0020] Optionally, in a cross-section perpendicular to the center line of the mounting hole, the cross-sections of both the strip-shaped light-shielding portion and the strip-shaped light-transmitting portion are fan-shaped.

[0021] A detection device includes a detection camera and the annular stripe light source as described in any one of the above.

[0022] The detection camera is installed on one side of the top of the housing to take pictures of the surface of the workpiece to be detected.

[0023] Compared with the prior art, the present utility model has the following beneficial effects:

[0024] The annular stripe light source and the detection device provided by the present utility model, through a clever structural improvement, enable the stripe tube to have a strip-shaped light-shielding portion and a strip-shaped light-transmitting portion, thereby avoiding the situation that dust and impurities enter the strip-shaped gap and affect the detection accuracy; in addition, the light-emitting component is arranged between the stripe tube and the housing, and debris and small impurities floating in the gas are not easily introduced between the stripe tube and the light-emitting component to interfere with the shape of the light and dark stripes, which is also beneficial to improving the detection accuracy.

[0025] The present utility model has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent specific embodiments, or will be described in detail in the accompanying drawings incorporated herein and the subsequent specific embodiments, and these drawings and specific embodiments are jointly used to explain the specific principles of the present utility model. Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 is a top view schematic diagram of the annular stripe light source provided by the embodiment of the present invention;

[0028] Figure 2 is this Figure 1 schematic diagram of the A-A cross-sectional structure in;

[0029] Figure 3 is a three-dimensional structure schematic diagram of the annular stripe light source provided by the embodiment of the present invention.

[0030] Reference numerals: 1, housing; 101, mounting hole; 2, stripe tube; 21, strip-shaped light-shielding part; 22, strip-shaped light-transmitting part; 3, light-emitting component; 31, circuit board; 32, LED lamp beads; 4, diffusion plate; 5, detection camera. Detailed implementation manners

[0031] To describe in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects, etc. of the present application, the following will be described in detail in conjunction with the specific embodiments listed and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0032] When "embodiment" is mentioned herein, it means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" that appears in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the meanings of the technical terms used herein are the same as those generally understood by those skilled in the technical field to which the present application belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit the present application.

[0034] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this text generally represents an "or" logical relationship between the associated objects before and after.

[0035] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationships between these entities or operations.

[0036] Without further limitations, in this application, the expressions "comprising", "including", "having", or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method, or product that includes the said elements. Thus, in a process, method, or product that includes a series of elements, it can include not only those defined elements, but also other elements that are not explicitly listed, or elements that are inherent to this process, method, or product.

[0037] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the present number; expressions such as "above", "below", "within", etc. are understood to include the present number. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two). Similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in this way, unless otherwise specifically defined.

[0038] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiment or the drawing. This is only for the convenience of describing the specific embodiments of this application or for the reader's understanding, and does not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of this application.

[0039] Unless otherwise clearly specified or defined, in the description of the embodiments of the present application, terms such as "installed", "connected", "linked", "fixed", and "set" shall be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] Embodiment 1

[0041] In view of the defects of the existing stripe light sources as described above, based on the rich practical experience and professional knowledge in the design and manufacture of such products for many years by the applicant, and in cooperation with the application of theory, the applicant actively conducts research and innovation, hoping to create a technology that can solve the defects in the existing technology and make the stripe light source more practical. After continuous research, design, and repeated sample making and improvement, the present utility model with practical value is finally created.

[0042] Please refer to Figures 1 to 3 , an embodiment of the present utility model provides an annular stripe light source, including: a housing 1 having a mounting hole 101; a stripe tube 2 installed in the mounting hole 101, the stripe tube 2 having a detection hole; the center line of the stripe tube 2 being parallel to the center line of the mounting hole 101, the stripe tube 2 having alternately arranged strip-shaped light-shielding portions 21 and strip-shaped light-transmitting portions 22; a light-emitting component 3 installed between the housing 1 and the stripe tube 2, the light emitted by the light-emitting component 3 passing through the strip-shaped light-transmitting portion 22 and irradiating on the surface of the detection hole for the workpiece 100 to be detected, so as to form light and dark alternating stripes on the surface of the workpiece 100 to be detected.

[0043] As Figure 1 and Figure 2 shown, the housing 1 is sleeved on the outer periphery of the stripe tube 2, and a light-emitting component 3 is installed between the housing 1 and the stripe tube 2. The light-emitting component 3 can be tubular or composed of a plurality of lamp beads arranged in a circle.

[0044] The stripe tube 2 emits light, and the light passes through the strip-shaped light-transmitting portion 22 and shoots towards the workpiece 100 to be detected, thereby forming light and dark alternating stripes on the surface of the workpiece 100 to be detected. It should be noted here that the bright stripes are formed by the light-emitting component 3 passing through the strip-shaped light-transmitting portion 22 and irradiating on the surface of the workpiece 100 to be detected, and the dark stripes are the projections of the strip-shaped light-shielding portions 21.

[0045] In this embodiment, on the one hand, the structure of the streak tube 2 is improved. The streak tube 2 has no strip-shaped gap, so small impurities will not get stuck in the strip-shaped gap and affect the effect of bright and dark fringes. In addition, the tubular streak tube 2 and the housing 1 can effectively protect the light-emitting component 3 and reduce the possibility of dust and small impurities entering between the streak tube 2 and the light-emitting component 3, thereby effectively maintaining the accuracy of defect detection and reducing the influence of small impurities such as debris on the detection result.

[0046] Optionally, as Figure 2 shown, both the strip-shaped light-shielding part 21 and the strip-shaped light-transmitting part 22 are parallel to the center line of the mounting hole 101. The strip-shaped light-shielding part 21 and the strip-shaped light-transmitting part 22 are parallel to each other. Once the bright and dark fringes are distorted or deformed, they can be observed more intuitively, which is beneficial to further improving the detection accuracy.

[0047] Optionally, the strip-shaped light-shielding part 21 is annular, the strip-shaped light-transmitting part 22 is annular, and both the strip-shaped light-shielding part 21 and the strip-shaped light-transmitting part 22 are perpendicular to the center line of the detection hole. At this time, both the bright fringes and the dark fringes are horizontally projected onto the surface of the workpiece 100 to be detected. The strip-shaped light-shielding part 21 and the strip-shaped light-transmitting part 22 are alternately laminated to form the required streak tube 2. Preferably, the streak tube 2 is a straight tube. Optionally, one end of the streak tube is large and the other end is small, forming a horn-shaped structure.

[0048] Optionally, the annular stripe light source further includes a diffuser plate 4 installed between the light-emitting component 3 and the streak tube 2; the light emitted by the light-emitting component 3 sequentially passes through the diffuser plate 4 and the streak tube 2.

[0049] Specifically, the diffuser plate 4 is used to homogenize the light, making the projection effect of the light and dark fringes more uniform to facilitate the detection by the detection camera 5.

[0050] Optionally, the diffuser plate 4 is tubular and sleeved on the outer periphery of the streak tube 2, so as to diffuse the light in the 360° direction and avoid local strong light or weak light on the surface of the workpiece 100 to be detected.

[0051] Optionally, the light-emitting component 3 includes a circuit board 31, on which LED lamp beads 32 are arranged in an array, and the LED lamp beads 32 are installed on the side of the circuit board 31 close to the streak tube 2.

[0052] Optionally, the housing 1 is a metal shell, and the circuit board 31 is attached to the shell wall of the housing 1. The metal shell has good heat dissipation effect and can effectively prevent the circuit board 31 from overheating.

[0053] Optionally, the surface of the strip-shaped light-shielding part 21 is coated with an absorbent layer, which is beneficial to making the boundary of the bright and dark fringes clearer.

[0054] Optionally, in a cross-section perpendicular to the center line of the mounting hole 101, the cross-sections of the strip-shaped light-shielding portion 21 and the strip-shaped light-transmitting portion 22 are both fan-shaped.

[0055] Optionally, a sealed space is formed between the diffusion plate 4 and the stripe tube 2 to prevent dust, debris, and impurities from entering the sealed space.

[0056] Optionally, the stripe tube includes a frame body and a strip-shaped light-transmitting body. The frame body includes a strip-shaped light-shielding portion 21, and a through strip-shaped groove is provided between adjacent strip-shaped light-shielding portions 21. The strip-shaped light-transmitting body is sealed and installed in the strip-shaped groove to form a strip-shaped light-transmitting portion 22. Preferably, the material of the strip-shaped light-transmitting portion 22 is transparent glass, transparent resin, or other light-transmitting materials.

[0057] Preferably, a cooling flow channel is provided inside the strip-shaped light-shielding portion 21, and a liquid cooling medium flows through the cooling flow channel.

[0058] Embodiment 2

[0059] A detection device includes a detection camera 5 and an annular stripe light source as described in Embodiment 1; the detection camera 5 is installed on one side of the top of the housing 1 to take pictures of the surface of the workpiece to be detected. Preferably, at least three detection cameras 5 are provided, and all the detection cameras 5 are arranged circumferentially around the center line of the detection hole.

[0060] Finally, it should be noted that although the above embodiments have been described in the text of the specification and drawings of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of the present application and using the content recorded in the text of the specification and drawings of the present application, as well as those directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. A ring-shaped stripe light source, characterized in that: include: A housing (1) having a mounting hole (101); A stripe tube (2) is installed in the installation hole (101), the stripe tube (2) having a detection hole; the center line of the stripe tube (2) is parallel to the center line of the installation hole (101), and the stripe tube (2) has stripe-shaped light-shielding portions (21) and stripe-shaped light-transmitting portions (22) that are alternately arranged; A light emitting component (3) is mounted between the housing (1) and the stripe tube (2), wherein light emitted by the light emitting component (3) passes through the strip-shaped light-transmitting portion (22) to illuminate the surface of the workpiece (100) to be detected in the detection hole, so as to form light and dark alternating stripes on the surface of the workpiece (100) to be detected.

2. The annular stripe light source according to claim 1, characterized in that: The strip-shaped light-shielding portion (21) and the strip-shaped light-transmitting portion (22) are both parallel to the center line of the mounting hole (101).

3. The annular stripe light source according to claim 1, characterized in that: The strip-shaped light-shielding portion (21) is annular, the strip-shaped light-transmitting portion (22) is annular, and both the strip-shaped light-shielding portion (21) and the strip-shaped light-transmitting portion (22) are perpendicular to the center line of the detection hole.

4. The annular stripe light source according to claim 1, characterized in that: It also includes a diffusion plate (4) installed between the light-emitting component (3) and the stripe tube (2); The light emitted by the light-emitting component (3) passes through the diffusion plate (4) and the streak tube (2) in sequence.

5. The annular stripe light source according to claim 4, characterized in that: The diffusion plate (4) is in a tubular shape and is sleeved on the outer circumference of the striped tube (2).

6. The annular stripe light source according to claim 1, characterized in that: The light-emitting component (3) comprises a circuit board (31), on which LED lamp beads (32) are arranged in an array, and the LED lamp beads (32) are mounted on a side of the circuit board (31) close to the stripe tube (2).

7. The annular stripe light source according to claim 6, characterized in that: The shell (1) is a metal shell, and the circuit board (31) is attached to the shell wall of the shell (1).

8. The annular stripe light source according to claim 1, characterized in that: The surface of the strip-shaped light-shielding portion (21) is coated with a light-absorbing layer.

9. The annular stripe light source according to claim 2, characterized in that: In a cross section perpendicular to the center line of the mounting hole (101), the cross sections of the strip-shaped light-shielding portion (21) and the strip-shaped light-transmitting portion (22) are both fan-shaped.

10. A detection device, characterized in that: It comprises a detection camera (5) and an annular stripe light source as claimed in any one of claims 1 to 9; The detection camera (5) is mounted on one side of the top of the housing (1) to take a picture of the surface of the workpiece to be detected.

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