Photographing device applied to industrial visual inspection

Abstract

The invention relates to the technical field of industrial visual inspection, in particular to a photographic device applied to industrial visual inspection, which comprises a camera main body and a lens cone retaining ring mounted at a lens of the camera main body, and further comprises a plurality of laser emission mechanisms and an independent driver, and the lens cone retaining ring is mounted on a lens of the camera main body and is provided with a protective lens; selecting at least two target laser emission mechanisms from the plurality of laser emission mechanisms, driving respective laser emission units to move to a preset working position and emit laser, and enabling at least two beams of emitted laser to intersect on the surface of the to-be-detected product to form an optical mark point; the laser intersection points are dynamically generated on the surface of the to-be-detected product to serve as marks, image quality reduction and feature recognition interference caused by mark line shielding are reduced, a pure image substrate is provided for a high-precision visual algorithm, visual disorder caused by numerous useless intersection lines in a fixed grid is not prone to occurring, the mark points are clear and independent, and the detection accuracy is improved. And the visual guide target is clear.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial visual inspection, and particularly to a photographic device applied to industrial visual inspection. BACKGROUND

[0002] Industrial visual inspection technology, as a core part of modern intelligent manufacturing, has been widely applied to online quality control and position guidance in many fields such as electronic component assembly, automobile part production, home appliance manufacturing, and precision instrument processing. In this technical system, in order to establish a stable and reliable coordinate reference datum in the image captured by the camera, to assist the visual algorithm in fast positioning, comparison or measurement, it is usually necessary to set up clear markers in the field of view of the camera.

[0003] In the prior art, the commonly used marker method in the industry is to etch permanent cross lines on the surface of the protective glass or filter in front of the industrial camera lens by physical or chemical means. In order to mark multiple targets, multiple interlaced fine lines are used to form multiple cross lines for marking. However, the multiple interlaced fine lines may block other components, inevitably reducing the clarity of part of the components. In addition, the fine lines forming the cross lines are easily interlaced with other fine lines, forming additional cross lines, which leads to confusion of the cross lines in visual inspection, and weakens the effectiveness of visual guidance. SUMMARY

[0004] The present application provides a photographic device applied to industrial visual inspection, and the specific scheme is as follows: A photographic device applied to industrial visual inspection, comprising a camera main body and a lens barrel guard ring installed at the lens thereof, the lens barrel guard ring being provided with a protective lens, and further comprising: A plurality of laser emission mechanisms are installed along the lens barrel guard ring, each of the laser emission mechanisms comprising a laser emission unit rotatably connected to the lens barrel guard ring and an electromagnetic drive assembly, the electromagnetic drive assembly being configured to drive the laser emission unit to move along the optical axis thereof; An independent drive mechanism is installed on the lens barrel guard ring and configured to drive each of the laser emission units to rotate; At least two target laser emission mechanisms are selected from the plurality of laser emission mechanisms, and the corresponding electromagnetic drive assemblies of the target laser emission mechanisms are controlled to drive the respective laser emission units to move to a preset working position and emit laser light, so that at least two beams of emitted laser light intersect on the surface of the product to be measured to form an optical marker point.

[0005] Further, the independent driving mechanism comprises a ring gear sleeved on the outer periphery of the lens barrel guard ring, a transmission gear mounted with the laser emitting unit, and a magnet corresponding to the electromagnetic driving assembly mounted on the transmission gear, so that the transmission gear is engaged with the ring gear when the laser emitting unit is driven to move along the optical axis direction by the electromagnetic driving assembly.

[0006] Further, the lens barrel guard ring is mounted with a driving motor, and the output end of the driving motor is engaged with the ring gear through a gear.

[0007] Further, the lens barrel guard ring is provided with a limiting installation cavity corresponding to the transmission gear, for limiting the action of the transmission gear in the limiting installation cavity.

[0008] Further, the electromagnetic driving assembly comprises an electromagnet mounted with the lens barrel guard ring and a sliding sleeve mounted with the laser emitting unit, and the transmission gear is mounted with the sliding sleeve on the laser emitting unit.

[0009] Further, the electromagnetic driving assembly further comprises a guide rod inserted with the sliding sleeve, the laser emitting unit is mounted on the guide rod, the magnet is mounted on the end of the guide rod away from the laser emitting unit, and the guide rod is sleeved with a return spring in a section of the inner cavity of the sliding sleeve.

[0010] Further, the inner wall of the sliding sleeve is mounted with a guide strip arranged along the axial direction, and the guide rod is arranged in the sliding groove along the guide strip.

[0011] Further, the laser emitting mechanisms are uniformly distributed along the circumference of the lens barrel guard ring, and the number of the laser emitting mechanisms is even.

[0012] Compared with the prior art, the present application can achieve the following beneficial effects: 1、The present application generates a laser intersection point on the surface of the product to be measured as a mark, which is essentially a scattering spot of two laser beams on the surface of the object, not a solid in the optical path of the camera, reducing the image quality decline and feature recognition interference caused by the mark line shielding, providing a pure image base for high-precision vision algorithm, accurately controlling the generation of only the current required mark point, and avoiding the visual confusion caused by numerous useless intersection lines in the fixed grid, the mark point is clear and independent, and the visual guidance target is clear.

[0013] 2、The laser emitting unit is kept in the reset position in the default state, when marking at one or more points is needed, each marking point is formed by the laser emitted by the two laser emitting units, when the corresponding laser emitting mechanism needs to be activated, the electromagnetic driving assembly is operated to drive the laser emitting unit in the laser emitting mechanism to extend, and the orientation of the laser emitting unit is adjusted through the independent driving mechanism, so that the two laser emitting units emit laser towards the corresponding marking point to form a marking point at the staggered position; and the electromagnetic driving assembly is used to drive the laser emitting unit to move along the optical axis direction, so that the laser emitting units corresponding to different marking points are arranged in a staggered manner, and the emitted laser is prevented from interfering with each other. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them: Figure 1 It is a schematic diagram of the overall structure of the present application.

[0015] Figure 2 It is a schematic diagram of the structure of the laser emitting unit of the present application when working.

[0016] Figure 3 It is a schematic diagram of the structure of the mirror tube ring part of the present application.

[0017] Figure 4 It is an enlarged view of A in the present application. Figure 3

[0018] Figure 5 It is a schematic diagram of the independent driving mechanism structure of the present application.

[0019] Figure 6 It is a motion state diagram of the guide rod and the laser emitting unit when the electromagnet of the present application works.

[0020] Among them, the reference signs are as follows: 1, camera body; 2, lens; 3, mirror tube ring; 4, protective lens; 5, laser emitting unit; 6, transmission gear; 7, ring gear; 8, driving motor; 9, electromagnet; 10, limit installation cavity; 11, sliding sleeve; 12, guide rod; 13, reset spring; 14, magnet. DETAILED DESCRIPTION

[0021] ​With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0022] Embodiment one, please refer to Figures 1 to 5 The present application provides a photographic device applied to industrial visual detection, comprising a camera main body 1 and a lens barrel protection ring 3 installed at the lens 2 thereof, a protective lens 4 is installed on the lens barrel protection ring 3, further comprising a plurality of laser emission mechanisms and independent driving mechanisms; The plurality of laser emission mechanisms are installed along the lens barrel protection ring 3, the laser emission mechanism comprises a laser emission unit 5 rotationally connected with the lens barrel protection ring 3 and an electromagnetic driving assembly, the electromagnetic driving assembly is used for driving the laser emission unit 5 to move along the optical axis direction thereof; It should be noted that a set of electromagnetic driving assemblies is arranged for each laser emission mechanism, so as to generate a pushing force or a pulling force along the laser optical axis direction, drive the entire laser emission unit 5 to do linear motion along the optical axis direction, realize axial displacement, and facilitate adjustment of different target laser emission units 5 to the corresponding planes.

[0023] The independent driving mechanism is installed on the lens barrel protection ring 3 and is used for driving each laser emission unit 5 to rotate.

[0024] The independent driving mechanism is used for driving each laser emission unit 5 to do independent rotary motion, so as to change the projection azimuth angle of the laser beam on the horizontal plane.

[0025] Among the plurality of laser emission mechanisms, at least two target laser emission mechanisms are selected, and the electromagnetic driving assemblies corresponding to the target laser emission mechanisms are controlled, so as to drive the respective laser emission units 5 to move to the preset working positions and emit laser, so that the emitted at least two laser beams intersect on the surface of the product to be detected to form an optical marking point.

[0026] Through the above structural design, in the default state, the laser emission unit 5 is kept in the reset position, when marking is needed at one or more points to form marking points, each marking point is composed of the laser emitted by two laser emission units 5, at this time, when the corresponding laser emission mechanism needs to be enabled, the electromagnetic driving assembly is worked to drive the laser emission unit 5 in the laser emission mechanism to extend, and the independent driving mechanism is used to adjust the orientation of the laser emission unit 5, so that the two laser emission units 5 emit laser towards the corresponding marking points to form the marking points at the intersection positions, such as Figure 2 the marking point e and the marking point f in FIG. 4; and the electromagnetic driving assembly is used to drive the laser emission unit 5 to move along the optical axis direction thereof, so that the laser emission units 5 corresponding to different marking points are arranged in a staggered manner, and the emitted laser is prevented from interfering with each other.

[0027] The independent drive mechanism includes an annular gear ring 7 sleeved on the outer circumference of the lens barrel retaining ring 3 and a transmission gear 6 mounted with the laser emitting unit 5. The transmission gear 6 is equipped with a magnet 14 corresponding to the electromagnetic drive assembly, so that when the laser emitting unit 5 is driven to move along its optical axis by the electromagnetic drive assembly, the transmission gear 6 meshes with the annular gear ring 7. The lens barrel retaining ring 3 has a limiting mounting cavity 10 corresponding to the transmission gear 6, which is used to limit the movement of the transmission gear 6 in the limiting mounting cavity 10. The limiting mounting cavity 10 is used to limit the position of the transmission gear moving in the axial direction, so that after it moves to the position of meshing with the annular gear ring 7, its movement is restricted.

[0028] It should be noted that an annular gear ring 7, which is fitted around the outer circumference of the lens barrel guard ring 3, serves as a common driving element. When a specific laser emitting mechanism needs to be activated, the corresponding electromagnetic drive component operates, emitting a magnetic force to repel the magnet 14 on the transmission gear 6. This drives the transmission gear 6 to mesh with the annular gear ring 7, thereby driving the corresponding transmission gear 6 and the laser emitting unit 5 to rotate through the rotating annular gear ring 7. This, in turn, adjusts the direction of the laser emitted by the laser emitting unit 5. Thus, through the cooperation of each electromagnetic drive component, the orientation of each laser emitting unit 5 can be independently controlled, and the emission direction of the laser beam can be precisely adjusted.

[0029] In addition, after individually adjusting the orientation of each laser emitting unit 5, the distance the laser emitting unit 5 moves along its optical axis is adjusted by controlling the operation of each electromagnetic drive component, so that the laser emitting units 5 corresponding to different marking points are misaligned to avoid mutual interference of the emitted lasers.

[0030] A drive motor 8 is mounted on the lens barrel retaining ring 3. The output end of the drive motor 8 meshes with the ring gear 7 via a gear. The independent drive mechanism also includes a drive motor 8 fixed on the lens barrel retaining ring 3, preferably a micro stepper motor or a servo motor. When it is necessary to adjust the projection direction of the laser emitting unit 5, the drive motor 8 is controlled to rotate, and the power is transmitted to the ring gear 7 through the drive gear, causing the ring gear 7 to rotate. Since the transmission gear 6 of the target laser emitting mechanism is meshed with the ring gear 7, the rotational motion of the ring gear 7 is converted into the rotation of the transmission gear 6, thereby driving the laser emitting unit 5 connected to it to rotate around its optical axis, and precisely adjusting the emission direction of the laser beam.

[0031] The laser emitting mechanisms are evenly distributed along the circumference of the lens barrel guard ring 3, and the number of laser emitting mechanisms is even. As an efficient and symmetrical layout scheme, the number of laser emitting mechanisms is preferably set to an even number, which facilitates the construction of a marker point by pairs of laser emitting units 5.

[0032] Example 2 further optimizes the photographic device for industrial visual inspection provided in Example 1. The difference from Example 1 is that... (See also: [link to Example 1]). Figures 4-6 The electromagnetic drive assembly includes an electromagnet 9 mounted to the lens barrel guard ring 3 and a sliding sleeve 11 mounted to the laser emitting unit 5. The transmission gear 6 is mounted to the sliding sleeve 11 on the laser emitting unit 5. The electromagnetic drive assembly also includes a guide rod 12 inserted into the sliding sleeve 11. The laser emitting unit 5 is mounted on the guide rod 12. The magnet 14 is mounted on the end of the guide rod 12 away from the laser emitting unit 5. A return spring 13 is sleeved on a section of the guide rod 12 located in the inner cavity of the sliding sleeve 11.

[0033] It should be noted that when it is necessary to individually control the movement of each laser emitting unit 5 along its optical axis, so that the laser emitting units 5 corresponding to different marking points are misaligned, the corresponding electromagnet 9 is energized to generate a magnetic force that repels the magnet 14 at the tail end of the guide rod 12. This force overcomes the elastic force of the return spring 13, pushing the guide rod 12 and the laser emitting unit 5 connected to it forward as a whole. This movement is achieved through the fixed connection between the laser emitting unit 5 and the sliding sleeve 11, ultimately manifested as the guide rod 12 driving the laser emitting unit 5 forward along the middle of the sliding sleeve 11. When the electromagnet 9 generates a reverse magnetic force, the elastic force stored in the return spring 13 is released, pushing the guide rod 12 and the laser emitting unit 5 backward to reset. At this time, the sliding sleeve 11 and the transmission gear 6 are simultaneously driven back to their original positions, disengaging from the ring gear 7.

[0034] The inner wall of the sliding sleeve 11 is equipped with a guide bar arranged along its axial direction. The guide rod 12 is slidably arranged along the guide bar through a groove. A guide bar is machined or inlaid on the inner wall of the sliding sleeve 11 along its axial direction. The cross-section of the guide bar can be rectangular or trapezoidal. It extends from one end of the inner cavity of the sliding sleeve 11 to the other end to form a sturdy guide rail, ensuring that the guide rod 12 moves smoothly in the inner cavity of the sliding sleeve 11 without any circumferential rotation, which facilitates precise adjustment of the orientation of the laser emitting unit 5.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A photographic device for industrial visual inspection, comprising a camera body (1) and a lens barrel guard (3) mounted on its lens (2), wherein a protective lens (4) is mounted on the lens barrel guard (3), characterized in that, Also includes: Multiple laser emitting mechanisms are installed on the lens barrel guard ring (3). Each laser emitting mechanism includes a laser emitting unit (5) rotatably connected to the lens barrel guard ring (3) and an electromagnetic drive assembly. The electromagnetic drive assembly is used to drive the laser emitting unit (5) to move along its optical axis. An independent drive mechanism is installed on the lens barrel guard ring (3) to drive each of the laser emitting units (5) to rotate; Among the plurality of laser emitting mechanisms, at least two target laser emitting mechanisms are selected, and the electromagnetic drive components corresponding to each target laser emitting mechanism are controlled to drive their respective laser emitting units (5) to move to a preset working position and emit lasers, so that at least two emitted laser beams converge on the surface of the product to be tested to form optical markers.

2. The photographic apparatus for industrial visual inspection as described in claim 1, characterized in that: The independent drive mechanism includes an annular toothed ring (7) sleeved on the outer periphery of the lens barrel guard ring (3) and a transmission gear (6) installed with the laser emitting unit (5). The transmission gear (6) is equipped with a magnet (14) corresponding to the electromagnetic drive assembly, so that when the laser emitting unit (5) is driven to move along its optical axis by the electromagnetic drive assembly, the transmission gear (6) meshes with the annular toothed ring (7).

3. The photographic device for industrial visual inspection as described in claim 2, characterized in that: A drive motor (8) is installed on the lens barrel guard ring (3), and the output end of the drive motor (8) meshes with the ring gear (7) through a gear.

4. The photographic device for industrial visual inspection as described in claim 1, characterized in that: The lens barrel guard ring (3) has a limiting mounting cavity (10) corresponding to the transmission gear (6) to restrict the movement of the transmission gear (6) in the limiting mounting cavity (10).

5. The photographic apparatus for industrial visual inspection as described in claim 2, characterized in that: The electromagnetic drive assembly includes an electromagnet (9) mounted to the lens barrel guard ring (3) and a sliding sleeve (11) mounted to the laser emitting unit (5). The transmission gear (6) is mounted to the sliding sleeve (11) on the laser emitting unit (5).

6. The photographic apparatus for industrial visual inspection as described in claim 5, characterized in that: The electromagnetic drive assembly also includes a guide rod (12) that is inserted into the sliding sleeve (11). The laser emitting unit (5) is mounted on the guide rod (12). The magnet (14) is mounted on the end of the guide rod (12) away from the laser emitting unit (5). A return spring (13) is sleeved on a section of the guide rod (12) located in the inner cavity of the sliding sleeve (11).

7. The photographic apparatus for industrial visual inspection as described in claim 6, characterized in that: The inner wall of the sliding sleeve (11) is equipped with a guide bar arranged along its axial direction, and the guide rod (12) is slidably arranged along the guide bar through a groove.

8. The photographic apparatus for industrial visual inspection as described in claim 1, characterized in that: The laser emitting mechanisms are evenly distributed along the circumference of the lens barrel guard ring (3), and the number of the laser emitting mechanisms is even.

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