Inner wall detection light source and visual detection device

Abstract

The utility model relates to the technical field of visual inspection, and discloses an inner wall detection light source and a visual inspection device, which are used for detecting the inner hole wall of a workpiece, and comprise a tubular support used for extending into the inner hole of the workpiece; the stripe light source comprises a parallel light emitting module and light absorbing partition plates which are arranged on the peripheral side of the tubular support in parallel at intervals; wherein a light-emitting gap is formed between every two adjacent light-absorbing partition plates, the parallel light-emitting modules are installed in the light-emitting gaps, and the light-emitting direction of the parallel light-emitting modules is parallel to the light-absorbing partition plates. According to the inner wall detection light source and the visual detection device disclosed by the utility model, surface defects of a workpiece can be more obviously highlighted, and the surface defects of the workpiece can be more accurately detected by a detection camera.

Description

Technical Field

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

[0002] In the current vision detection device, the light source directly projects light onto the surface of the workpiece, and then the detection camera takes pictures for detection.

[0003] The existing light sources are generally point light sources or surface light sources. When the light of the light source is projected onto the surface of the workpiece, it is difficult to clearly show the surface defects on the surface of the workpiece, especially on the curved surface.

[0004] In view of this, it is necessary to design an inner wall detection light source and a vision detection device to more clearly highlight the surface defects of the workpiece.

[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 inner wall detection light source and a vision detection device to more clearly show the surface defects of the workpiece.

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

[0008] An inner wall detection light source for detecting the inner hole wall of a workpiece, comprising:

[0009] A tubular bracket for extending into the inner hole of the workpiece;

[0010] A stripe light source, comprising a parallel light output module and light absorption partitions which are installed on the outer peripheral side of the tubular bracket at intervals and in parallel;

[0011] Wherein, a light output gap is formed between two adjacent light absorption partitions, the parallel light output module is installed in the light output gap, and the light output direction of the parallel light output module is parallel to the light absorption partitions.

[0012] Optionally, the light absorption partitions are perpendicular to the center line of the tubular bracket, the light absorption partitions are annular plates, and the light absorption partitions are sleeved on the outer peripheral side of the tubular bracket.

[0013] Optionally, the parallel light output module includes a lamp bead, a first condenser lens and a second condenser lens which are arranged in sequence along the light output direction.

[0014] Optionally, a cooling flow channel is formed inside the tubular bracket.

[0015] Optionally, the inner wall detection light source further includes a water inlet joint and a water outlet joint, and the water inlet joint and the water outlet joint are respectively communicated with opposite ends of the cooling flow channel.

[0016] Optionally, the inner wall detection light source further includes a top partition and a bottom partition, and opposite ends of the tubular bracket are respectively connected to the top partition and the bottom partition;

[0017] The water inlet joint is located on the top partition, and the water outlet joint is located on the bottom partition.

[0018] Optionally, the stripe light source includes a circuit board attached to the outer peripheral surface of the tubular bracket, and all the lamp beads are mounted on the circuit board; one end of the light absorbing partition close to the tubular bracket is attached to the circuit board.

[0019] Optionally, the inner wall detection light source further includes a transparent protection plate;

[0020] The transparent protection plate is tubular, and one end of the light absorbing partition away from the tubular bracket is fixed on the transparent protection plate.

[0021] A vision detection device includes the inner wall detection light source as described in any one of the above;

[0022] The tubular bracket is fixedly connected with a detection camera, and the detection camera is inclined to photograph the inner hole wall of the workpiece.

[0023] Optionally, at least 3 detection cameras are provided, and all the cameras are circumferentially and arrayedly distributed around the center line of the tubular bracket.

[0024] Compared with the prior art, the present utility model has the following beneficial effects:

[0025] For the inner wall detection light source and the vision detection device provided by the present utility model, the parallel light emitting module emits light outward, and under the limitation of the light absorbing partition, it irradiates on the surface of the workpiece, thereby forming a projection effect of light and dark stripes. When the light and dark stripes are projected on defects such as scratches and depressions, the stripes will be significantly distorted or deformed, thus significantly reflecting the surface defects of the workpiece and facilitating the detection camera to take pictures for detection.

[0026] The present utility model has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent detailed implementation manners, or will be detailedly described in the accompanying drawings incorporated herein and the subsequent detailed implementation manners. These accompanying drawings and detailed implementation manners are jointly used to explain the specific principles of the present utility model. Description of the Drawings

[0027] 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 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 also be obtained based on these drawings.

[0028] Figure 1 is a schematic cross-sectional structure diagram of an inner wall detection light source provided by an embodiment of the present invention;

[0029] Figure 2 is Figure 1 an enlarged schematic diagram of position A in

[0030] Reference numerals: 1, tubular bracket; 11, cooling channel; 12, water inlet joint; 13, water outlet joint; 100, workpiece; 2, stripe light source; 21, parallel light output module; 22, light absorption partition; 211, lamp bead; 212, first condenser lens; 213, second condenser lens; 214, circuit board; 31, top partition; 32, bottom partition; 4, detection camera; 5, transparent protection plate. Detailed implementation manners

[0031] To elaborate in detail on 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] Referring to "embodiments" in this article means that the specific features, structures or characteristics described in combination with the embodiments can be included in at least one embodiment of the present application. The term "embodiment" appearing 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 in this article 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 in this article 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 "include", "comprise", "have", 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 described elements. Thus, a process, method, or product that includes a series of elements may include not only those limited elements, but also other elements not explicitly listed, or elements inherent to such a 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 recited number; expressions such as "above", "below", "within", etc. are understood to include the recited 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 "multiple", such as "multiple groups", "multiple times", etc., are understood in the same 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 drawings. It is only for the convenience of describing the specific embodiments of this application or for the reader's understanding, rather than indicating or implying 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 to 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", "set", etc. 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 a direct connection or an indirect connection 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 light sources described above, based on the applicant's rich R & D experience and professional knowledge in the design and manufacture of such products for many years, and in combination with the application of principles, the applicant actively conducts research and innovation in the hope of creating a technology that can solve the defects in the existing technology and make the light source more practical. After continuous research, design, and repeated sample making and improvement, the applicant finally creates the present utility model with practical value.

[0042] Please refer to Figure 1 and Figure 2 , an inner wall detection light source provided by an embodiment of the present utility model is used to detect the inner hole wall of a workpiece 100, and includes: a tubular bracket 1 for extending into the inner hole of the workpiece 100; a stripe light source 2 including a parallel light emitting module 21 and light absorbing partitions 22 installed on the outer peripheral side of the tubular bracket 1 at intervals and in parallel; wherein, a light emitting gap is formed between two adjacent light absorbing partitions 22, the parallel light emitting module 21 is installed in the light emitting gap, and the light emitting direction of the parallel light emitting module 21 is parallel to the light absorbing partitions 22.

[0043] In this embodiment, a group of parallel light emitting modules 21 will emit a strip-shaped light spot to form light stripes, and the presence of the light absorbing partitions 22 will result in a dark stripe between two adjacent light stripes, thereby forming light and dark stripes on the surface of the workpiece 100, and the light and dark stripes on the surface of the workpiece 100 are parallel to each other under normal conditions. Whether it is a dark stripe or a light stripe, when projected onto defects such as scratches and depressions on the surface of the workpiece 100, the light and dark stripes will be distorted or deformed, more significantly reflecting the surface defects of the workpiece 100, thereby making it easier for the detection camera 4 to detect surface defects.

[0044] Optionally, the light-absorbing partition 22 is perpendicular to the center line of the tubular support 1. The light-absorbing partition 22 is an annular plate, and the light-absorbing partition 22 is sleeved on the outer peripheral side of the tubular support 1. Each group of parallel light-emitting modules 21 forms an annular strip-shaped light spot on the inner hole wall of the workpiece 100. The light-absorbing partition 22 is annular, which can better separate each parallel light-emitting module 21 and avoid light crosstalk, thus affecting the boundary clarity of the stripes. It should also be added that the light-absorbing partition 22 itself has the ability to block light, reduce reflection, make the light emission more parallel, and make the boundary of the stripe light spot irradiated on the surface of the workpiece 100 clearer.

[0045] Optionally, the parallel light-emitting module 21 includes a lamp bead 211, a first condenser lens 212, and a second condenser lens 213 arranged in sequence along the light-emitting direction. Specifically, the first condenser lens 212 and the second condenser lens 213 are used to correct the light of the lamp bead 211 so that the finally emitted light is parallel light. It should be further added that a group of parallel light-emitting modules 21 may include several lamp beads 211, and all the lamp beads 211 in the same group are arranged in a circumferential array around the tubular support 1.

[0046] Optionally, a cooling channel 11 is formed inside the tubular support 1. Specifically, the cooling channel 11 can improve the cooling effect of the inner wall detection light source, so that the lamp bead 211 can choose a lamp bead with a larger power, further improving the illumination effect, which is beneficial to improving the subsequent detection effect. In addition, the larger power of the lamp bead 211 is also beneficial to improving the detection accuracy of the detection camera 4.

[0047] Optionally, the inner wall detection light source further includes a water inlet joint 12 and a water outlet joint 13, and the water inlet joint 12 and the water outlet joint 13 are respectively communicated with opposite ends of the cooling channel 11. In this embodiment, the flow rate of the coolant in the cooling channel 11 can be controlled by controlling the water inlet joint 12 and the water outlet joint 13 to ensure the cooling effect.

[0048] Optionally, the inner wall detection light source further includes a top partition 31 and a bottom partition 32. Opposite ends of the tubular support 1 are respectively connected to the top partition 31 and the bottom partition 32; the water inlet joint 12 is located on the top partition 31, and the water outlet joint 13 is located on the bottom partition 32. The top partition 31 shields one end of the cooling channel 11, and the bottom partition 32 shields the other end of the cooling channel 11, and the transparent protection plate 5 is located between the top partition 31 and the bottom partition 32. The top partition 31 and the bottom partition 32 also function to fix the transparent protection plate 5 and can better support and fix the transparent protection plate 5.

[0049] Optionally, the stripe light source 2 includes a circuit board 214 attached to the outer peripheral surface of the tubular bracket 1, and all the lamp beads 211 are mounted on the circuit board 214; one end of the light-absorbing partition 22 close to the tubular bracket 1 is attached to the circuit board 214. The circuit board 214 is attached to the tubular bracket 1, and the heat dissipation effect is better, which can effectively prevent the circuit board 214 and the lamp beads 211 on the circuit board 214 from overheating.

[0050] Optionally, the inner wall detection light source further includes a transparent protection plate 5; the transparent protection plate 5 is tubular, and one end of the light-absorbing partition 22 away from the tubular bracket 1 is fixed on the transparent protection plate 5. The transparent protection plate 5 plays a protective role, which can effectively prevent external dust or other impurities from entering the light-emitting gap, reducing the possibility of the first condenser lens 212 and the second condenser lens 213 being affected, and is conducive to ensuring the clear visibility of the stripes.

[0051] Embodiment 2

[0052] This embodiment discloses a vision detection device, including the inner wall detection light source as described in Embodiment 1; the tubular bracket 1 is fixedly connected with a detection camera 4, and the detection camera 4 is inclined to photograph the inner hole wall of the workpiece 100. The light and dark stripes of the inner wall detection light source are projected on the surface of the workpiece 100, and then the detection camera 4 takes pictures for detection, so that the surface defects of the workpiece 100 can be detected more easily, improving the detection accuracy.

[0053] Optionally, at least 3 detection cameras 4 are provided, and all the cameras are circumferentially arrayed around the center line of the tubular bracket 1 to ensure that the detection cameras 4 can completely detect the required detection surface of the workpiece 100.

[0054] 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, using the content recorded in the text of the specification and drawings of the present application, and any technical solutions directly or indirectly implementing the above embodiments in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An inner wall detection light source for detecting the inner hole wall of a workpiece (100), characterized in that, Comprising: A tubular support (1) for extending into the inner hole of a workpiece (100); A stripe light source (2), comprising a parallel light-emitting module (21) and light-absorbing partitions (22) spaced parallelly and mounted on the outer peripheral side of the tubular support (1); Wherein, a light-emitting gap is formed between two adjacent light-absorbing partitions (22), the parallel light-emitting module (21) is mounted in the light-emitting gap, and the light-emitting direction of the parallel light-emitting module (21) is parallel to the light-absorbing partitions (22).

2. The inner wall detection light source according to claim 1, wherein The light-absorbing partitions (22) are perpendicular to the center line of the tubular support (1); the light-absorbing partitions (22) are annular plates, and the light-absorbing partitions (22) are sleeved on the outer peripheral side of the tubular support (1).

3. The inner wall detection light source according to claim 1, characterized in that The parallel light-emitting module (21) comprises a lamp bead (211), a first condenser lens (212) and a second condenser lens (213) arranged in sequence along the light-emitting direction.

4. The inner wall detection light source according to claim 1, wherein A cooling channel (11) is formed inside the tubular support (1).

5. The inner wall detection light source according to claim 4, characterized in that, It further comprises a water inlet joint (12) and a water outlet joint (13), and the water inlet joint (12) and the water outlet joint (13) are respectively communicated with opposite ends of the cooling channel (11).

6. The inner wall detection light source according to claim 5, characterized in that, It further comprises a top partition (31) and a bottom partition (32), and opposite ends of the tubular support (1) are respectively connected to the top partition (31) and the bottom partition (32); The water inlet joint (12) is located on the top partition (31), and the water outlet joint (13) is located on the bottom partition (32).

7. The inner wall detection light source according to claim 3, characterized in that The stripe light source (2) comprises a circuit board (214) attached to the outer peripheral surface of the tubular support (1), and all the lamp beads (211) are mounted on the circuit board (214); one end of the light-absorbing partition (22) close to the tubular support (1) is attached to the circuit board (214).

8. The inner wall detection light source according to claim 1, characterized in that, It further comprises a transparent protection plate (5); The transparent protection plate (5) is tubular, and one end of the light-absorbing partition (22) far from the tubular support (1) is fixed on the transparent protection plate (5).

9. A visual detection device, characterized in that, Comprising an inner wall detection light source as described in any one of claims 1-8; The tubular support (1) is fixedly connected with a detection camera (4), and the detection camera (4) is inclined to photograph the inner hole wall of the workpiece (100).

10. The visual detection device according to claim 9, wherein At least 3 detection cameras (4) are provided, and all the cameras are circumferentially and arrayedly distributed around the center line of the tubular support (1).

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