Image detection device

Abstract

The invention relates to the technical field of machine vision detection, and discloses an image detection device, which comprises a first camera, a first magnification lens, a second camera, a second magnification lens, a corner coaxial light source and a light splitting assembly, the first magnification lens is mounted on the first camera, and the first magnification lens faces the light splitting assembly; the second magnification lens is mounted on the second camera and faces the light splitting assembly; the corner coaxial light source is used for illuminating a workpiece and reflecting a reflected light beam of the workpiece to the light splitting assembly; the light splitting assembly is used for emitting the reflected light beam to the first magnification lens and / or the second magnification lens. The image detection device is wider in application range.

Description

Technical Field

[0001] The present invention relates to the technical field of machine vision detection, and in particular to an image detection device. Background Art

[0002] Visual detection is to use a machine to replace the human eye for measurement and judgment, and can be used to detect whether a workpiece is qualified.

[0003] Existing visual detection devices generally use a camera and a lens module to take pictures of a workpiece, and then judge whether the workpiece is qualified according to the captured image. However, in this detection method, the lens can only output a workpiece image with one magnification ratio to the camera, and it is impossible to simultaneously meet the needs of large-range global detection and high-precision local detection. The applicable range is relatively small and it is difficult to meet various needs in actual detection.

[0004] In view of this, it is necessary to design an image detection device to further expand the applicable range of the image detection device.

[0005] The above information is given as background information only to assist in understanding the present disclosure, and does not determine or admit whether any of the above content can be used as the prior art relative to the present disclosure. Summary of the Invention

[0006] The present invention provides an image detection device with a larger applicable range.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An image detection device includes a first camera, a first magnification lens, a second camera, a second magnification lens, a corner coaxial light source and a beam splitting component;

[0009] The first magnification lens is mounted on the first camera and the first magnification lens faces the beam splitting component; the second magnification lens is mounted on the second camera and the second magnification lens faces the beam splitting component;

[0010] The corner coaxial light source is used to illuminate the workpiece and reflect the reflected light beam of the workpiece towards the beam splitting component; the beam splitting component is used to direct the reflected light beam towards the first magnification lens and / or the second magnification lens.

[0011] Optionally, the beam splitting component includes a square beam splitting prism, a triangular reflection prism, a first adjustment device for adjusting the position of the corner coaxial light source and a second adjustment device for adjusting the position of the triangular reflection prism;

[0012] When the corner coaxial light source is located at the preset first position and the triangular reflecting prism is located at the preset first reflecting position, the reflection light outlet of the corner coaxial light source faces the square beam splitter prism directly. The square beam splitter prism divides the reflected light beam into a first imaging light beam directed towards the first magnification lens and a second imaging light beam directed towards the triangular reflecting prism, and the second imaging light beam is directed towards the second magnification lens after passing through the triangular reflecting prism.

[0013] Optionally, when the corner coaxial light source is located at the preset second position and the triangular reflecting prism is located at the preset second reflecting position, the reflection light outlet of the corner coaxial light source faces the triangular reflecting prism directly. The triangular reflecting prism reflects the reflected light beam to the second magnification lens.

[0014] Optionally, when the corner coaxial light source is located at the preset first position and the triangular reflecting prism is located at the preset third reflecting position, the reflection light outlet of the corner coaxial light source faces the square beam splitter prism directly, and the mirror surface of the triangular reflecting prism does not face the square beam splitter prism.

[0015] Optionally, the image detection device further includes a support plate;

[0016] The first camera, the first magnification lens, the second camera, the second magnification lens, the corner coaxial light source and the beam splitting assembly are all mounted on the same side of the support plate;

[0017] The support plate has a first plate surface close to the first camera, and the rotation drive shafts of the first adjustment device and the second adjustment device are both perpendicular to the first plate surface.

[0018] Optionally, a first clamping seat and a first pressing plate for pressing the first magnification lens onto the first clamping seat are further provided on the support plate;

[0019] A second clamping seat and a second pressing plate for pressing the second magnification lens onto the second clamping seat are further provided on the support plate.

[0020] Optionally, a first horizontal sliding groove is formed on the support plate, and the second clamping seat is slidably mounted in the first horizontal sliding groove;

[0021] A second horizontal sliding groove is further provided on the support plate, and the triangular reflecting prism is slidably mounted in the second horizontal sliding groove, and the triangular reflecting prism is always located directly below the second magnification lens.

[0022] Optionally, the beam splitting assembly includes a square beam splitter prism, a triangular reflecting prism and a light shielding plate;

[0023] The reflection light outlet of the corner coaxial light source faces the square beam splitter prism directly. The square beam splitter prism divides the reflected light beam into a first imaging light beam directed towards the first magnification lens and a second imaging light beam directed towards the triangular reflecting prism, and the second imaging light beam is directed towards the second magnification lens after passing through the triangular reflecting prism;

[0024] The light blocking plate is located between the square beam splitter prism and the first magnification lens, and the horizontal position of the light blocking plate is adjustable.

[0025] Optionally, the corner coaxial light source is located directly below the square beam splitter prism, and the center point of the square beam splitter prism, the center point of the corner coaxial light source, and the center point of the triangular reflecting prism are located on the same vertical plane.

[0026] Optionally, both the first adjustment device and the second adjustment device are servo motors.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] For the image detection device provided by the present invention, the light rays of the workpiece reflecting the corner coaxial light source form a reflected light beam. After being reflected by the corner coaxial light source, the reflected light beam is directed towards the beam splitting component. The beam splitting component can only transmit the reflected light beam to the first magnification lens to meet the need for global detection, or only transmit the reflected light beam to the second magnification lens for precise detection, or simultaneously transmit the reflected light beam to the first magnification lens and the second magnification lens to simultaneously achieve global detection of the workpiece and precise detection of the local part of the workpiece. The user can select different detection modes according to the detection requirements of the workpiece, and the applicable range of the image detection device in the present invention is significantly increased.

[0029] The present invention 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. These accompanying drawings and specific embodiments are jointly used to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the following described accompanying drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these accompanying drawings.

[0031] Figure 1 is an exploded schematic view of the image detection device provided by the embodiment of the present invention;

[0032] Figure 2 It is a front view schematic diagram of the image detection device provided by an embodiment of the present invention;

[0033] Figure 3 It is a side view schematic diagram of the image detection device provided by an embodiment of the present invention;

[0034] Figure 4 It is a rear view schematic diagram of the image detection device provided by an embodiment of the present invention;

[0035] Figure 5 It is a top view schematic diagram of the image detection device including a light shield provided by an embodiment of the present invention;

[0036] Figure 6 It is a side view schematic diagram of another image detection device provided by an embodiment of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the image detection device when the corner coaxial light source is located at a preset second position and the triangular reflection prism is located at a preset second reflection position provided by an embodiment of the present invention.

[0038] Reference numerals: 1, first camera; 2, first magnification lens; 3, second camera; 4, second magnification lens; 5, corner coaxial light source; 6, beam splitting component; 6, beam splitting component; 61, square beam splitting prism; 62, triangular reflection prism; 7, support plate; 71, first horizontal sliding groove; 72, second horizontal sliding groove; 701, first plate surface; 81, first clamping seat; 82, first pressing plate; 83, second clamping seat; 84, second pressing plate; 9, light shield. Detailed implementation manners

[0039] To describe in detail the possible application scenarios, technical principles, implementable specific solutions, achievable purposes and effects, etc. of the present application, the following is described in detail with reference to the specific embodiments listed and in conjunction with the 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.

[0040] Referring to "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at 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 the corresponding implementable technical solutions.

[0041] Unless otherwise defined, the technical terms used herein have the same meanings as those commonly understood by those skilled in the technical field to which this application pertains; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0042] 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, which means: A exists, B exists, and both A and B exist simultaneously. Additionally, the character " / " herein generally represents an "or" logical relationship between the associated objects before and after.

[0043] 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.

[0044] Without further limitations, in this application, the expressions "including", "comprising", "having", or other similar expressions used in statements 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 including the described elements. Thus, a process, method, or product including a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or elements inherent to such a process, method, or product.

[0045] 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), and similar expressions related to "multiple", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.

[0046] 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 embodiments or drawings. It is only for the convenience of describing the specific embodiments of this application or facilitating the understanding of the reader, and does not indicate or imply that the indicated device or component 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.

[0047] 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.

[0048] In view of the defects existing in the above-mentioned existing image detection devices, based on the rich practical experience and professional knowledge accumulated over the years in the design and manufacture of such products by the applicant, and in cooperation with the application of theory, the applicant actively conducts research and innovation in the hope of creating an image detection device that can solve the defects in the prior art and is more practical. After continuous research, design, repeated sample production and improvement, the present invention with practical value is finally created.

[0049] Please refer to Figures 1 to 4 , an embodiment of the present invention provides an image detection device, including a first camera 1, a first magnification lens 2, a second camera 3, a second magnification lens 4, a corner coaxial light source 5 and a beam splitting component 6.

[0050] Among them, the first magnification lens 2 is installed on the first camera 1 and the first magnification lens 2 faces the beam splitting component 6. The first magnification lens 2 is used to introduce light into the first camera 1 so that the first camera 1 forms a workpiece image with a first magnification ratio; the second magnification lens 4 is installed on the second camera 3 and the second magnification lens 4 faces the beam splitting component 6. The second magnification lens 4 is used to introduce light into the second camera 3 so that the second camera 3 forms a workpiece image with a second magnification ratio.

[0051] The corner coaxial light source 5 is used to illuminate the workpiece and reflect the reflected light beam of the workpiece towards the beam splitting component 6; the beam splitting component 6 is used to direct the reflected light beam towards the first magnification lens 2 and / or the second magnification lens 4. The reflected light beam of the workpiece refers to the light beam reflected by the workpiece.

[0052] In this embodiment, the corner coaxial light source 5 emits light towards the workpiece to illuminate the workpiece, and the workpiece reflects the light of the corner coaxial light source 5 to form a reflected light beam. After being reflected by the corner coaxial light source 5, the reflected light beam is directed towards the beam splitting component 6. The beam splitting component 6 can transmit only the reflected light beam to the first magnification lens 2 to meet the needs of global detection, or only transmit the reflected light beam to the second magnification lens 4 to meet the needs of precise detection. Or, the beam splitting component 6 simultaneously transmits the reflected light beam to the first magnification lens 2 and the second magnification lens 4, enabling the first camera 1 to form a workpiece image with a first magnification and the second camera 3 to form a workpiece image with a second magnification, thereby simultaneously achieving global detection of the workpiece and precise detection of the workpiece. The user can select different detection modes according to the detection needs of the workpiece. The applicable range of the image detection device in the present invention is significantly increased.

[0053] The image detection device in this embodiment does not require the workpiece to be placed under two different camera modules for detection. It can simultaneously detect the entire surface of the workpiece and the local surface features of the workpiece with high precision in a single detection, effectively improving the detection efficiency and applicable range.

[0054] Optionally, the beam splitting component 6 includes a square beam splitting prism 61, a triangular reflecting prism 62, a first adjustment device for adjusting the position of the corner coaxial light source 5, and a second adjustment device for adjusting the position of the triangular reflecting prism 62. As Figure 2 shown, when the corner coaxial light source 5 is located at a preset first position and the triangular reflecting prism 62 is located at a preset first reflection position, the reflection light outlet of the corner coaxial light source 5 is directly opposite the square beam splitting prism 61. The square beam splitting prism 61 divides the reflected light beam into a first imaging light beam directed towards the first magnification lens 2 and a second imaging light beam directed towards the triangular reflecting prism 62, and the second imaging light beam is directed towards the second magnification lens 4 after passing through the triangular reflecting prism 62. The first imaging light beam passes through the first magnification lens 2 and enters the first camera 1 to form a workpiece image with a first magnification, and the second imaging light beam passes through the second magnification lens 4 and enters the second camera 3 to form a workpiece image with a second magnification. Figure 1 In [the figure], neither the first adjustment device nor the second adjustment device is shown.

[0055] Optionally, as Figure 7, when the corner coaxial light source 5 is located at the preset second position and the triangular reflecting prism 62 is located at the preset second reflection position, the reflection light outlet of the corner coaxial light source 5 faces the triangular reflecting prism 62 directly, and the triangular reflecting prism 62 reflects the reflected light beam to the second magnification lens 4. At this time, the corner coaxial light source 5 directly reflects the workpiece image to the triangular reflecting prism 62, and the triangular reflecting prism 62 reflects the workpiece image into the second camera 3. In this embodiment, the corner coaxial light source 5 can rotate around a first rotation axis perpendicular to the first plate surface 701, and the triangular reflecting prism 62 can rotate around a second rotation axis perpendicular to the first plate surface 701, so that the workpiece image directly shoots towards the second camera 3 without passing through the square beam splitter prism 61, which is beneficial to improving the illumination intensity, reducing light loss, and making the formed second magnified workpiece image more likely to highlight the surface defects of the workpiece.

[0056] Optionally, when the corner coaxial light source 5 is located at the preset first position and the triangular reflecting prism 62 is located at the preset third reflection position, the reflection light outlet of the corner coaxial light source 5 faces the square beam splitter prism 61 directly, and the mirror surface of the triangular reflecting prism 62 does not face the square beam splitter prism 61. It should be added that when the triangular reflecting prism 62 is located at the preset third reflection position at this time, the triangular reflecting prism 62 faces away from the square beam splitter prism 61 and does not reflect the second imaging light beam split by the square beam splitter prism 61. At this time, the second camera 3 will not image.

[0057] Optionally, the image detection device further includes a support plate 7; the first camera 1, the first magnification lens 2, the second camera 3, the second magnification lens 4, the corner coaxial light source 5 and the beam splitting assembly 6 are all installed on the same side of the support plate 7, and the support plate 7 supports all the above components; the support plate 7 has a first plate surface 701 close to the first camera 1, and the rotation drive shafts of the first adjustment device and the second adjustment device are both perpendicular to the first plate surface 701. It should be added that the first adjustment device is used to drive the corner coaxial light source 5 to rotate to a suitable angle, and the first adjustment device can be a motor, a rotary cylinder or other rotary drive devices that can drive the corner coaxial light source 5 to rotate to a specific angle. Similarly, the second adjustment device can be a motor, a rotary cylinder or other rotary drive devices.

[0058] Optionally, a first clamping seat 81 and a first pressing plate 82 for pressing the first magnification lens 2 onto the first clamping seat 81 are further arranged on the support plate 7; a second clamping seat 83 and a second pressing plate 84 for pressing the second magnification lens 4 onto the second clamping seat 83 are further arranged on the support plate 7.

[0059] In this embodiment, the first clamping seat 81 and the first pressing plate 82 cooperate to clamp the first magnification lens 2, and the second clamping seat 83 and the second pressing plate 84 cooperate to clamp the second magnification lens 4.

[0060] Optionally, a first transverse chute 71 is formed in the support plate 7, and the second clamping seat 83 is slidably mounted in the first transverse chute 71; a second transverse chute 72 is further provided on the support plate 7, and the triangular reflecting prism 62 is slidably mounted in the second transverse chute 72, and the triangular reflecting prism 62 is always located directly below the second magnification lens 4. The first transverse chute 71 is used to adjust the position of the second magnification lens 4 to avoid conflicts with the position of the second magnification lens 4; in addition, the optical path from the second magnification lens 4 to the triangular reflecting prism 62 can be changed, improving the flexibility of the structure.

[0061] Optionally, the beam splitting assembly 6 includes a square beam splitting prism 61, a triangular reflecting prism 62 and a light blocking plate 9; the reflection light outlet of the corner coaxial light source 5 faces the square beam splitting prism 61 directly, the square beam splitting prism 61 divides the reflected light beam into a first imaging light beam directed to the first magnification lens 2 and a second imaging light beam directed to the triangular reflecting prism 62, and the second imaging light beam is directed to the second magnification lens 4 through the triangular reflecting prism 62; the light blocking plate 9 is located between the square beam splitting prism 61 and the first magnification lens 2, and the lateral position of the light blocking plate 9 is adjustable.

[0062] In another specific embodiment, as Figure 5 , at this time, the light blocking plate 9 neither blocks the first imaging light beam nor the second imaging light beam, and both the first camera 1 and the second camera 3 can image. When the light blocking plate 9 slides to directly above the square beam splitting prism 61, the light blocking plate 9 blocks the first imaging light beam, and the first camera 1 cannot image, while the second camera 3 images normally. When the light blocking plate 9 slides to directly above the triangular reflecting prism 62, the light blocking plate 9 blocks the second imaging light beam, the first camera 1 can image, and the second camera 3 cannot image. In this embodiment, the position adjustment of the light blocking plate 9 is simple and easy to operate, which can be very convenient for the user to use. Preferably, a lateral telescopic device can be provided to laterally adjust the position of the light blocking plate 9.

[0063] Optionally, the corner coaxial light source 5 is located directly below the square beam splitting prism 61, and the center points of the square beam splitting prism 61, the corner coaxial light source 5 and the triangular reflecting prism 62 are located on the same vertical plane to ensure that when the corner coaxial light source 5 rotates to the preset second position, it can directly reflect the workpiece image through the internal beam splitter and direct it to the triangular reflecting prism 62. Figure 6 The installation position of the first adjustment device is particularly drawn in Figure 6 the motor at the lower left corner position in

[0064] Optionally, both the first adjustment device and the second adjustment device are servo motors.

[0065] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of this application, the patent protection scope of this application cannot be limited thereby. Any technical solutions generated by equivalent structure or equivalent process substitution or modification made based on the essential concept of this application and using the content recorded in the text and drawings of the specification of this application, as well as the direct or indirect implementation of the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of this application.

Claims

1. An image detection device, characterized in that: It includes a first camera, a first magnification lens, a second camera, a second magnification lens, an angled coaxial light source and a light splitting component; The first magnification lens is mounted on the first camera and faces the light splitting component; the second magnification lens is mounted on the second camera and faces the light splitting component; The angled coaxial light source is used to illuminate the workpiece and reflect the reflected light beam of the workpiece toward the beam splitter component; the beam splitter component is used to direct the reflected light beam toward the first magnification lens and / or the second magnification lens.

2. The image detection device according to claim 1, characterized in that: The light splitting assembly includes a square light splitting prism, a triangular reflecting prism, a first adjusting device for adjusting the position of the corner coaxial light source, and a second adjusting device for adjusting the position of the triangular reflecting prism; When the corner coaxial light source is located at a preset first position and the triangular reflecting prism is located at a preset first reflecting position, the reflected light outlet of the corner coaxial light source is directly opposite to the square beam splitter prism, and the square beam splitter prism splits the reflected light beam into a first imaging light beam directed toward the first magnification lens and a second imaging light beam directed toward the triangular reflecting prism, and the second imaging light beam is directed toward the second magnification lens via the triangular reflecting prism.

3. The image detection device according to claim 2, characterized in that: When the corner coaxial light source is located at a preset second position and the triangular reflecting prism is located at a preset second reflecting position, the reflected light outlet of the corner coaxial light source faces the triangular reflecting prism, and the triangular reflecting prism reflects the reflected light beam to the second magnification lens.

4. The image detection device according to claim 3, characterized in that: When the corner coaxial light source is located at a preset first position and the triangular reflecting prism is located at a preset third reflecting position, the reflected light outlet of the corner coaxial light source faces the square beam splitter prism, and the mirror surface of the triangular reflecting prism does not face the square beam splitter prism.

5. The image detection device according to claim 2, characterized in that: Also included is a support plate; The first camera, the first magnification lens, the second camera, the second magnification lens, the angled coaxial light source and the light splitting component are all mounted on the same side of the support plate; The support plate has a first plate surface close to the first camera, and the rotation drive shafts of the first adjustment device and the second adjustment device are both perpendicular to the first plate surface.

6. The image detection device according to claim 5, characterized in that: The support plate is also provided with a first clamping seat and a first pressing plate for pressing the first magnification lens onto the first clamping seat; The support plate is also provided with a second clamping seat and a second pressing plate for pressing the second magnification lens onto the second clamping seat.

7. The image detection device according to claim 6, characterized in that: The support plate is provided with a first transverse sliding groove, and the second clamping seat can be slidably installed in the first transverse sliding groove; The support plate is also provided with a second transverse sliding groove, and the triangular reflecting prism can be slidably installed in the second transverse sliding groove, and the triangular reflecting prism is always located directly below the second magnification lens.

8. The image detection device according to claim 1, characterized in that: The light splitting component includes a square light splitting prism, a triangular reflecting prism and a light blocking plate; The reflected light outlet of the corner coaxial light source faces the square beam splitter prism, and the square beam splitter prism splits the reflected light beam into a first imaging light beam directed to the first magnification lens and a second imaging light beam directed to the triangular reflection prism, and the second imaging light beam is directed to the second magnification lens via the triangular reflection prism; The light blocking plate is located between the square beam splitter prism and the first magnification lens, and the lateral position of the light blocking plate is adjustable.

9. The image detection device according to claim 2 or 8, characterized in that: The corner coaxial light source is located directly below the square beam splitter prism, and the center point of the square beam splitter prism, the center point of the corner coaxial light source and the center point of the triangular reflecting prism are located on the same vertical plane.

10. The image detection device according to claim 5, characterized in that: The first adjusting device and the second adjusting device are both servo motors.

Images