Automatic detection device for grid defects

Abstract

The present disclosure belongs to the field of nuclear power technology, and specifically relates to an automatic detection device for grid defects. In the defect detection device disclosed in the present disclosure, multiple cameras are respectively fixed on the camera pads, and the camera pads are fixed on the front of the camera back plate; the movable end of the single-axis slide is fixedly connected to the back of the camera back plate, and the single-axis slide is used for fine-tuning the positions of multiple cameras; the single-axis slide is fixedly connected to the back plate support; the coaxial light source bracket is fixed on the back plate support, and multiple coaxial light sources are fixed on the coaxial light source bracket. The lens of each camera is directly opposite to a coaxial light source, and each coaxial light source is used to provide lighting for the image acquisition area of ​​the camera facing it; the X-axis module, the Z-axis module, and the Y-axis module realize the movement of the camera assembly in the X-axis, Z-axis, and Y-axis directions, and the positioning and rotation of the grid are realized by the positioning and rotating mechanism. Thereby improving the detection efficiency and reducing human errors.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to an automatic detection device for grid defects. Background Art

[0002] In the related technology, the quality of the grid needs to be inspected manually, which relies heavily on the experience of the inspectors. There is a high probability of false detection and missed detection, and the inspection efficiency is low, making it impossible to effectively control the quality of the grid products. Therefore, how to improve the efficiency and accuracy of grid quality inspection has become a problem that needs to be solved urgently. Summary of the invention

[0003] In order to overcome the problems existing in the related art, an automatic detection device for grid defects is provided.

[0004] According to one aspect of an embodiment of the present disclosure, there is provided an automatic detection device for grid defects, the automatic detection device for grid defects comprising a camera assembly, the camera assembly comprising a plurality of cameras, a camera spacer block, a camera back plate, a coaxial light source bracket, a plurality of coaxial light sources, and a single-axis slide;

[0005] The plurality of cameras are respectively fixed on the camera raising blocks, and the camera raising blocks are fixed on the front side of the camera back plate;

[0006] The movable end of the single-axis slide is fixedly connected to the back of the camera back plate, and the single-axis slide is used for fine-tuning the positions of multiple cameras;

[0007] The single-axis slide is fixedly connected to the back plate support;

[0008] The coaxial light source bracket is fixed on the back plate support, and multiple coaxial light sources are fixed on the coaxial light source bracket. The lens of each camera faces a coaxial light source, and each coaxial light source is used to provide lighting for the image acquisition area of ​​the camera facing it.

[0009] The automatic detection device for grid defects also includes: a left support, a right support, an X-axis module, a Z-axis module, a Y-axis module and a positioning and rotating mechanism;

[0010] The Y-axis module is fixedly connected to the right support, the X-axis module is connected to the driving end of the Y-axis module and is mounted between the left support and the right support, the Z-axis module is connected to the driving end of the X-axis module, and the camera assembly is connected to the driving end of the Z-axis module;

[0011] The X-axis module can drive the camera assembly to move along the horizontal X-axis direction, the Z-axis module can drive the camera assembly to move along the vertical Z-axis direction, and the Y-axis module can drive the camera assembly to move along the horizontal Y-axis direction;

[0012] The positioning and rotating mechanism is used to place the grid to be inspected.

[0013] In a possible implementation, the positioning and rotating mechanism includes: a turntable and a rotating motor;

[0014] The turntable is connected to the rotor of the rotary motor, and the rotary motor is used to drive the turntable to rotate.

[0015] In one possible implementation, the turntable includes: a backlight source is arranged inside the turntable, a turntable panel on the upper surface of the turntable is made of a transparent material, the turntable panel is used to place the grid to be inspected, and the backlight source can illuminate the grid on the turntable panel through the turntable panel.

[0016] In a possible implementation, a first positioning block and a second positioning block are disposed on the upper surface of the turntable, and the first positioning block and the second positioning block are L-shaped and are used to limit two diagonal corners of the grid to be inspected.

[0017] In a possible implementation, the multiple cameras are arranged in a straight line, and the distribution of the camera lenses is adapted to the distribution of the grids of the to-be-detected grid, so that each camera lens can be aligned with a grid unit.

[0018] In a possible implementation, the automatic detection device for grid defects further includes a controller;

[0019] The controller drives the camera to traverse each grid unit through the X-axis module, the Z-axis module, and the Y-axis module to collect the image of the inner wall of each grid unit;

[0020] The controller performs defect recognition based on the acquired image and marks the position of the defect on the acquired image.

[0021] The beneficial effects of the present disclosure are as follows: the X-axis module, Z-axis module, and Y-axis module of the automatic detection device for grid defects of the present disclosure realize the movement of the camera assembly in the X-axis, Z-axis, and Y-axis directions, and the positioning and rotation of the grid are realized through the positioning and rotating mechanism, thereby improving the detection efficiency and reducing human errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of an automatic detection device for grid defects according to an exemplary embodiment.

[0023] Figure 2 The figure is a schematic diagram of a camera assembly of an automatic detection device for grid defects according to an exemplary embodiment.

[0024] Figure 3The figure is a schematic diagram of a camera assembly of an automatic detection device for grid defects according to an exemplary embodiment.

[0025] Figure 4 It is a schematic diagram of a positioning and rotating mechanism of an automatic detection device for grid defects according to an exemplary embodiment. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Figure 1 is a schematic diagram of an automatic detection device for grid defects according to an exemplary embodiment. Figure 2 The figure is a schematic diagram of a camera assembly of an automatic detection device for grid defects according to an exemplary embodiment. Figure 3 The figure is a schematic diagram of a camera assembly of an automatic detection device for grid defects according to an exemplary embodiment. Figure 4 FIG. 1 is a schematic diagram of a positioning and rotating mechanism of an automatic detection device for grid defects according to an exemplary embodiment. Figures 1 to 4 As shown, the automatic detection device for grid defects disclosed in the present invention includes a left support 1, a guide rail assembly 2, a heightening pad 3, a guide rail limit block 4, an X-axis module bracket 5, an X-axis drag chain assembly 6, an X-axis module 7, a Z-axis drag chain assembly 8, a Z-axis module 9, a Y-axis module 10, a Y-axis drag chain assembly 11, a right support 12, a smart camera 13, a camera lens 14, a camera heightening block 15, a camera back plate 16, a single-axis slide 17, a back plate support 18, a sliding bottom plate 19, a coaxial light source bracket 20, a coaxial light source 21, a sensor bracket 22, a diffuse reflection sensor 23, a positioning platform bottom plate 24, a positioning platform side plate one 25, a first positioning block 26, a positioning platform side plate two 27, a turntable panel 28, a positioning platform side plate three 29, a second positioning block 30, a positioning platform side plate four 31, and a support foot 32.

[0028] The camera assembly mainly includes an intelligent camera 13, a camera lens 14, a camera heightening block 15, a camera back plate 16, a single-axis slide 17, a back plate support 18, a sliding base plate 19, a coaxial light source bracket 20, and a coaxial light source 21.

[0029] The positioning and rotating mechanism includes a positioning platform bottom plate 24, a positioning platform side plate 1 25, a first positioning block 26, a positioning platform side plate 27, a turntable panel 28, a positioning platform side plate 3 29, a second positioning block 30, a positioning platform side plate 4 31, a support base 32 and a backlight source 33;

[0030] The guide rail assembly 2 is mainly used for carrying, flipping, moving and other actions during the grid inspection.

[0031] The height-increasing pad 3 is used for the height-increasing support of the auxiliary end sliding of the X-axis module bracket 5 .

[0032] The guide rail limit blocks 4 are fixed at both ends of the guide rail assembly 2 to prevent the module from moving beyond the range, serving as the final hard limit.

[0033] The X-axis horizontal module bracket 5 is made of aluminum plate, which can reduce the weight of the body to the greatest extent while ensuring rigidity, and ensure smooth longitudinal movement with low resistance; the X-axis horizontal module bracket 5 is mainly used to fix the X-axis drag chain assembly 6, the X-axis module 7, the Z-axis drag chain assembly 8, the Z-axis module 9 and its fixings, etc.;

[0034] The Z-axis module 9 is mainly used to fix the Z-axis drag chain assembly 8 and the camera assembly, etc.

[0035] The Y-axis module 10 is fixed on the right bracket 12, and serves as a single-axis driving robot of the Y-axis. The X-axis cross-module bracket 5 and all the upper fixings thereof are fixed on its slider, ensuring that the X-axis cross-module bracket 5 and all the upper fixings thereof move synchronously as a whole during operation.

[0036] The smart camera 13 and the camera lens 14 are matched and connected. There are two sets of components in the present invention, which are fixed on the camera pad block 15 respectively, and then fixed on the camera back plate 16 as a whole to form a two-camera integral component.

[0037] The single-axis slide 17 is fixed to the back of the camera back plate 16, one at each end, and is used for fine-tuning the overall components of the camera.

[0038] The back plate support 18 is connected to the sliding bottom plate 19 and is used to be heightened and concentric with the coaxial light source.

[0039] The coaxial light source bracket 20 is fixed to both ends of the back plate support 18 , and the coaxial light source 21 is fixed on the coaxial light source bracket 20 .

[0040] The diffuse reflection sensor 23 is fixed on the sensor bracket 22, and is used to detect whether there is material on the positioning rotation mechanism, to ensure that no collision occurs during the detection, and to confirm the detection of whether there is material.

[0041] The positioning platform bottom plate 24 and the positioning platform side plate 1 25, the positioning platform side plate 27, the turntable panel 28, the positioning platform side plate 3 29, and the positioning platform side plate 4 31 form a box-like structure. The backlight source 33 is fixed on the positioning platform bottom plate 24 inside the box-like structure. The turntable panel 28 supported by a transparent material is fixed on the upper part of the box-like structure (wherein the transparent material can be, for example, transparent glass or organic glass, etc.). The first positioning block 26 and the second positioning block 30 are diagonally fixed on the upper part of the turntable panel 28, forming a positioning and rotating mechanism as a whole.

[0042] Function and working principle of the automatic detection device for grid defects:

[0043] The automatic detection device for grid defects is mainly composed of a detection mechanism, a camera assembly, a positioning and rotating mechanism, a visual system, a software system, etc. Among them: the detection mechanism is responsible for the detection and movement of the grid, the camera assembly is responsible for taking pictures of defects, and the positioning and rotating mechanism is responsible for the positioning of the grid, switching the detection surface and other functions. Each visual system module is composed of a camera, a lens, a light source and a software system. The visual system can convert the image and other signals obtained during the grid appearance detection process into data that can be recognized and analyzed by the industrial computer, and all data are stored in the database. The software system can analyze and process the data converted by the visual system and stored in the database for image recognition, classification and defect determination. The unqualified data system automatically identifies and statistically analyzes the detection results to provide data support for quality management and auxiliary process analysis. The analysis and processing results are displayed on the interface of the "positioning grid detection system software" for further analysis and processing by the operator. In addition to automatically recording and analyzing appearance inspection data, the software system also supports manual entry of inspection data and participation in statistical analysis.

[0044] The main body of the detection mechanism consists of X-axis, Y-axis, Z-axis, etc., which are mainly used to drive the camera assembly, that is, 2 smart cameras arranged side by side, with a spacing of 8 grid units, to move as a whole to detect the deformation and splash defects of the rigid convex, spring, strip, and spot welding tongue of the grid. The working angle of the two groups of smart cameras is parallel to the vertical direction. The camera and light source adjustment module is used to adjust the position and posture of the smart camera (2 groups) to facilitate project debugging. The backlight source is used to assist the smart camera (2 groups) to detect the deformation and splash defects of the rigid convex, spring, strip, and spot welding tongue on the inner wall of the grid; because each square inside the grid is deep, the camera well depth cannot be fully viewed at once, and it is necessary to move the vertical direction to take pictures twice until the entire square is fully inspected; according to the requirements of different types of grid inspection, the camera field of view can only clearly shoot one side of the grid, so it is necessary to use an external loading and unloading mechanism, such as a manipulator to turn the grid over, and then continue to inspect the other side. During normal operation, the positioning and rotating mechanism is equipped with a diffuse reflection sensor, which is used to detect whether the grid being inspected is placed on the positioning and rotating mechanism.

[0045] The specific detection process of the automatic detection device B is as follows:

[0046] a. The external loading and unloading mechanism loads a grid onto the positioning and rotating mechanism;

[0047] b The detection mechanism of the automatic detection device B drives the intelligent camera to traverse the positions of all rigid convexities, springs, strips, and spot welding tongues above the grid in an "S"-shaped path in the order of first X direction and then Y direction, and detects and records the deformation and spatter defects of each rigid convexity, spring, strip, and spot welding tongue.

[0048] c After the deformation and spatter defects of the rigid convexity, spring, strip and spot welding tongue on the upper surface of the grid are inspected, the external loading and unloading mechanism needs to flip the upward side of the grid 180° so that it faces downward and place it on the positioning and rotating mechanism.

[0049] Repeat the above step b to perform the test again.

[0050] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An automatic detection device for grid defects, characterized in that: The automatic detection device for grid defects includes a camera assembly, which includes a plurality of cameras, a camera pad, a camera back plate, a coaxial light source bracket, a plurality of coaxial light sources, and a single-axis slide; The plurality of cameras are respectively fixed on the camera raising blocks, and the camera raising blocks are fixed on the front side of the camera back plate; The movable end of the single-axis slide is fixedly connected to the back of the camera back plate, and the single-axis slide is used for fine-tuning the positions of multiple cameras; The single-axis slide is fixedly connected to the back plate support; The coaxial light source bracket is fixed on the back plate support, and multiple coaxial light sources are fixed on the coaxial light source bracket. The lens of each camera faces a coaxial light source, and each coaxial light source is used to provide lighting for the image acquisition area of ​​the camera facing it. The automatic detection device for grid defects also includes: a left support, a right support, an X-axis module, a Z-axis module, a Y-axis module and a positioning and rotating mechanism; The Y-axis module is fixedly connected to the right support, the X-axis module is connected to the driving end of the Y-axis module and is mounted between the left support and the right support, the Z-axis module is connected to the driving end of the X-axis module, and the camera assembly is connected to the driving end of the Z-axis module; The X-axis module can drive the camera assembly to move along the horizontal X-axis direction, the Z-axis module can drive the camera assembly to move along the vertical Z-axis direction, and the Y-axis module can drive the camera assembly to move along the horizontal Y-axis direction; The positioning and rotating mechanism is used to place the grid to be inspected; The positioning and rotating mechanism comprises: a turntable and a rotating motor; The turntable is connected to the rotor of the rotary motor, and the rotary motor is used to drive the turntable to rotate; The turntable comprises: a backlight source is arranged inside the turntable, a turntable panel on the upper surface of the turntable is made of a transparent material, the turntable panel is used to place a grid to be detected, and the backlight source can illuminate the grid on the turntable panel through the turntable panel; A first positioning block and a second positioning block are arranged on the upper surface of the turntable, wherein the first positioning block and the second positioning block are L-shaped and are used to limit the two diagonal corners of the grid to be inspected; The plurality of cameras are arranged in a straight line, and the distribution of the camera lenses is adapted to the distribution of the grids of the grid to be inspected, so that each camera lens can be aligned with a grid unit; The device also includes a guide rail assembly for carrying, flipping and moving during grid detection; a back plate support is connected to the sliding bottom plate and is used to be concentric with the coaxial light source after being raised; and a diffuse reflection sensor is configured on the positioning rotating mechanism to detect whether there is material on the positioning rotating mechanism.

2. The automatic detection device for grid defects according to claim 1, characterized in that: The automatic detection device for grid defects also includes a controller; The controller drives the camera to traverse each grid unit through the X-axis module, the Z-axis module, and the Y-axis module to collect the image of the inner wall of each grid unit; The controller performs defect recognition based on the acquired image and marks the position of the defect on the acquired image.

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