CN114624252A

CN114624252A - Automatic detection device for grid defects

Info

Publication number: CN114624252A
Application number: CN202111623081.7A
Authority: CN
Inventors: 王丹; 盛锋; 黄洋; 李峰; 尹富斌; 陈仲全; 谢威; 王洪; 蒋文峰; 景云亮; 刘宗峰; 袁林; 杜兵
Original assignee: Xi'an Yifei Nuclear Energy Equipment Co ltd; China Jianzhong Nuclear Fuel Co Ltd
Current assignee: Xi'an Yifei Nuclear Energy Equipment Co ltd; China Jianzhong Nuclear Fuel Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-06-14

Abstract

The utility model belongs to the technical field of nuclear power, concretely relates to an automatic checkout device for framework defect. In the defect detection device, a plurality of cameras are respectively fixed on a camera heightening block, and the camera heightening block is fixed on the front surface of a camera back plate; the movable end of the single-shaft sliding table is fixedly connected with the back surface of the camera back plate, and the single-shaft sliding table is used for fine adjustment of the positions of a plurality of cameras; the single-shaft sliding table is fixedly connected with the back plate support; the coaxial light source support is fixed on the back plate support, the coaxial light sources are fixed on the coaxial light source support, the lens of each camera is opposite to one coaxial light source, and each coaxial light source is used for providing illumination for the image acquisition area of the opposite camera; the X-axis module, the Z-axis module and the Y-axis module realize the movement of the camera assembly in the X-axis direction, the Z-axis direction and the Y-axis direction, and realize the positioning and the rotation of the grillwork through the positioning and rotating mechanism. Thereby improving the detection efficiency and reducing human errors.

Description

Automatic detection device for grid defects

Technical Field

The invention belongs to the technical field of nuclear power, and particularly relates to an automatic detection device for grid defects.

Background

In the related art, the quality of the grillwork needs to be checked manually, the inspection personnel seriously depend on the experience, the probability of false detection and missed detection is high, the inspection efficiency is low, and the quality of the grillwork product cannot be effectively controlled, so that the efficiency and the accuracy of the grillwork quality inspection are improved, and the problem to be solved urgently is solved.

Disclosure of Invention

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

According to an aspect of the embodiments of the present disclosure, there is provided an automatic detection apparatus for grid defects, the automatic detection apparatus for grid defects includes a camera assembly, the camera assembly includes a plurality of cameras, a camera block, a camera back plate, a coaxial light source bracket, a plurality of coaxial light sources, a single-axis sliding table;

the cameras are respectively fixed on the camera heightening blocks, and the camera heightening blocks are fixed on the front surface of the camera back plate;

the movable end of the single-shaft sliding table is fixedly connected with the back surface of the camera back plate, and the single-shaft sliding table is used for fine adjustment of the positions of the cameras;

the single-shaft sliding table is fixedly connected with the back plate support;

the coaxial light source support is fixed on the back plate support, the coaxial light sources are fixed on the coaxial light source support, the lens of each camera is opposite to one coaxial light source, and each coaxial light source is used for providing illumination for the image acquisition area of the opposite camera;

the automatic detection apparatus for grid defects further comprises: the device comprises a left support, a right support, an X-axis module, a Z-axis module, a Y-axis module and a positioning 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 erected 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 a horizontal X-axis direction, the Z-axis module can drive the camera assembly to move along a vertical Z-axis direction, and the Y-axis module can drive the camera assembly to move along a horizontal Y-axis direction;

the positioning and rotating mechanism is used for placing a grillwork to be detected.

In one possible implementation, the positioning and rotating mechanism includes: a turntable and a rotary motor;

the rotary table is connected with a rotor of the rotary motor, and the rotary motor is used for driving the rotary table to rotate.

In one possible implementation, the turntable includes: the inside backlight that sets up of revolving stage, the revolving stage panel of revolving stage upper surface is made by transparent material, the revolving stage panel is used for placing the check grid that waits to detect, the backlight can see through the revolving stage panel is right check grid on the revolving stage panel throws light on.

In a possible implementation manner, a first positioning block and a second positioning block are arranged on the upper surface of the rotary table, and the first positioning block and the second positioning block are L-shaped and used for limiting two opposite angles of a grid to be detected.

In one possible implementation, the plurality of cameras are arranged in a line, and the distribution of the camera lenses is adapted to the distribution of the grid cells of the grid to be detected, so that each camera lens can be aligned with one grid cell.

In a possible implementation manner, the automatic detection device for grid defects further comprises 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, and images of the inner side wall of each grid unit are collected;

and the controller identifies the defects according to the acquired images and identifies the positions with the defects on the acquired images.

The beneficial effect of this disclosure lies in: the X-axis module and the Z-axis module of the automatic detection device for the grid defects and the Y-axis module realize the movement of the camera assembly in the X-axis direction, the Z-axis direction and the Y-axis direction, and realize the positioning and the rotation of the grid through the positioning and rotating mechanism. Thereby improving the detection efficiency and reducing human errors.

Drawings

Fig. 1 is a schematic diagram illustrating an automatic detection apparatus for grid defects according to an exemplary embodiment.

FIG. 2 is a schematic view of a camera assembly of an apparatus for automated detection of grid defects, according to an exemplary embodiment.

Fig. 3 is a schematic view of a camera assembly of an apparatus for automatic detection of grid defects, according to an exemplary embodiment.

Fig. 4 is a schematic diagram illustrating a positioning rotation mechanism of an automatic detection apparatus for grid defects according to an exemplary embodiment.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

Fig. 1 is a schematic diagram illustrating an automatic detection apparatus for grid defects according to an exemplary embodiment. Fig. 2 is a schematic view of a camera assembly of an apparatus for automatic detection of grid defects, according to an exemplary embodiment. Fig. 3 is a schematic view of a camera assembly of an apparatus for automatic detection of grid defects, according to an exemplary embodiment. Fig. 4 is a schematic diagram illustrating a positioning rotation mechanism of an automatic detection apparatus for grid defects according to an exemplary embodiment. As shown in fig. 1 to 4, the automatic detection device for grid defects of the present disclosure includes a left support 1, a guide rail assembly 2, a heightening pad 3, a guide rail stopper 4, an X-axis module support 5, an X-axis tow chain assembly 6, an X-axis module 7, a Z-axis tow chain assembly 8, a Z-axis module 9, a Y-axis module 10, a Y-axis tow chain assembly 11, a right support 12, an intelligent camera 13, a camera lens 14, a camera pad height block 15, a camera back plate 16, a single-axis sliding table 17, a back plate support 18, a sliding bottom plate 19, a coaxial light source support 20, a coaxial light source 21, a sensor support 22, a diffuse reflection sensor 23, a positioning table bottom plate 24, a positioning table side plate one 25, a first positioning block 26, a positioning table side plate two 27, a turntable panel 28, a positioning table side plate three 29, a second positioning block 30, a positioning table side plate four 31, and a foot rest 32.

The camera assembly mainly includes a smart camera 13, a camera lens 14, a camera block-up block 15, a camera back plate 16, a single-axis slide table 17, a back plate support 18, a slide base plate 19, a coaxial light source support 20, and a coaxial light source 21.

The positioning and rotating mechanism comprises a positioning table bottom plate 24, a positioning table side plate I25, a first positioning block 26, a positioning table side plate II 27, a turntable panel 28, a positioning table side plate III 29, a second positioning block 30, a positioning table side plate IV 31, a supporting foot seat 32 and a backlight source 33;

the guide rail assembly 2 is mainly used for carrying, overturning, moving and the like during grid detection.

The heightening pad 3 is used for heightening and supporting the auxiliary end of the X-axis module bracket 5 in a sliding manner.

Guide rail stopper 4 be fixed in the both ends of guide rail set spare 2, prevent that the module from removing beyond the scope, as final hard spacing.

The X-axis transverse module bracket 5 is formed by processing an aluminum plate, so that the weight of the body is reduced to the maximum extent while the rigidity is ensured, the longitudinal movement is ensured to be smooth, and the resistance is small; the X-axis transverse module bracket 5 is mainly used for fixing an X-axis drag chain assembly 6, an X-axis module 7, a Z-axis drag chain assembly 8, a Z-axis module 9, fixing parts thereof and the like;

the Z-axis module 9 is mainly used for fixing the Z-axis drag chain assembly 8, the camera assembly and the like.

The Y-axis module 10 is fixed on the right support 12 and used as a Y-axis driving single-axis robot, the X-axis transverse module support 5 and all fixing pieces on the upper portion of the X-axis transverse module support are fixed on a sliding block of the Y-axis driving single-axis robot, and the X-axis transverse module support 5 and all fixing pieces on the upper portion of the X-axis transverse module support are guaranteed to integrally and synchronously move in the working process.

The intelligent camera 13 and the camera lens 14 are connected in a matching way, and the intelligent camera is totally 2 sets of components which are respectively fixed on the camera heightening block 15 and then are integrally fixed on the camera back plate 16 to form a whole part of two cameras.

The single-shaft sliding table 17 is fixed on the back of the camera back plate 16, and the left end and the right end of the single-shaft sliding table are respectively used for fine adjustment of the whole camera component.

The backboard support 18 is connected with the sliding bottom board 19 for heightening and then concentric with the coaxial light source.

The coaxial light source bracket 20 is fixed at two ends of the backboard support 18, and the coaxial light source 21 is fixed on the coaxial light source bracket 20.

The diffuse reflection sensor 23 is fixed on the sensor support 22 and used for detecting whether the positioning rotation mechanism is filled with materials, so that collision is avoided and whether the materials are detected is ensured.

The positioning table bottom plate 24, the positioning table side plate I25, the positioning table side plate II 27, the rotary table panel 28, the positioning table side plate III 29 and the positioning table side plate IV 31 form a box-shaped structure, the backlight source 33 is fixed on the positioning table bottom plate 24 in the box-shaped structure, the rotary table panel 28 (wherein the transparent material can be transparent glass or organic glass, and the like, for example) supported by a transparent material is fixed on the upper portion of the box-shaped structure, the first positioning block 26 and the second positioning block 30 are fixed on the diagonal of the upper portion of the rotary table panel 28, and the positioning rotary mechanism is integrally formed.

The function and the working principle of the automatic detection device for the grid defects are as follows:

the automatic detection device for the grid defects mainly comprises a detection mechanism, a camera assembly, a positioning and rotating mechanism, a vision system, a software system and the like. Wherein: the detection mechanism is responsible for detection and movement of the grillwork, the camera assembly is responsible for shooting defects, the positioning rotating mechanism is responsible for functions of positioning of the grillwork, switching of detection surfaces and the like, each visual system module is composed of a camera, a lens, a light source and a software system, the visual system can convert signals such as images and the like acquired in the grillwork appearance detection process into data which can be recognized and analyzed by an industrial personal computer, and all data are stored in a database. The software system can analyze, process image recognition, classify and defect judgment the data converted by the vision system and stored in the database, automatically identify the unqualified data system, statistically analyze the detection result and provide data support for quality management and auxiliary process analysis. And the analysis and processing results are displayed on an interface of the positioning grid detection system software for further analysis and processing by operators. The software system can automatically record and analyze the appearance detection data, and also supports manual recording of the detection data and participation in statistical analysis.

The detection mechanism main part comprises X axle, Y axle, Z axle etc. mainly is used for driving the camera subassembly, 2 intelligent cameras side by side promptly, and 8 grid units of interval move as a whole, detects just protruding, spring, strip of framework, the deformation and the defect condition that splashes of spot welding tongue. The working angles of the 2 groups of intelligent cameras are parallel to the vertical direction, and the camera and light source adjusting modules are used for adjusting the positions and postures of the intelligent cameras (2 groups), so that project debugging is facilitated. The backlight source is used for assisting the intelligent camera (2 groups) to detect deformation and splashing defects of rigid protrusions, springs, strips and spot welding tongues on the inner wall of the grillwork; because each grid in the framework is deep, the well depth of a camera cannot be checked clearly at one time, and the camera needs to move in the vertical direction for secondary photographing until all detection in the whole grid is finished; according to the requirements of detecting different types of grids, the visual field of a camera can only shoot one side of the grids clearly, so that the grids need to be turned over by means of an external loading and unloading mechanism, such as a manipulator, and then the detection of the other side is continuously carried out. When the positioning and rotating mechanism works normally, the positioning and rotating mechanism is provided with the diffuse reflection sensor, and the diffuse reflection sensor is used for detecting whether the grid frame which is being detected is placed on the positioning and rotating mechanism or not.

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

a, an external feeding and discharging mechanism feeds a grillwork to a positioning rotating mechanism;

b, driving an intelligent camera to traverse the positions of all rigid bulges, springs, strips and spot welding tongues above the grid frame by an S-shaped path in sequence in the X direction and the Y direction, and detecting and recording the deformation and splashing defect conditions of each rigid bulge, spring, strip and spot welding tongue.

c, after the deformation and the splash defects of the rigid bulge, the spring, the strip and the spot welding tongue on the upper surface of the grid frame are detected, the side of the grid frame, which faces upwards, needs to be turned 180 degrees by an external loading and unloading mechanism to be turned downwards, and the grid frame is placed on a positioning rotating mechanism.

And repeating the step b for detection.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and 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 terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. The automatic detection device for the grid defects is characterized by comprising a camera assembly, a camera module and a control module, wherein the camera assembly comprises a plurality of cameras, a camera heightening block, a camera back plate, a coaxial light source support, a plurality of coaxial light sources and a single-shaft sliding table;

the movable end of the single-shaft sliding table is fixedly connected with the back surface of the camera back plate, and the single-shaft sliding table is used for fine adjustment of the positions of a plurality of cameras;

the automatic detection apparatus for grid defects further includes: the device comprises a left support, a right support, an X-axis module, a Z-axis module, a Y-axis module and a positioning rotating mechanism;

2. The automatic detection device for grid defects according to claim 1, characterized in that said positioning rotation mechanism comprises: a turntable and a rotary motor;

3. The automatic detection apparatus for grid defects of claim 2, wherein the turntable comprises: the inside backlight that sets up of revolving stage, the revolving stage panel of revolving stage upper surface is made by transparent material, the revolving stage panel is used for placing the check grid that waits to detect, the backlight can see through the revolving stage panel is right check grid on the revolving stage panel throws light on.

4. The automatic detection device for grid defects of claim 2, wherein the upper surface of the turntable is provided with a first positioning block and a second positioning block, and the first positioning block and the second positioning block are L-shaped for limiting two opposite corners of the grid to be detected.

5. The apparatus of claim 1, wherein the plurality of cameras are arranged in a line, and the distribution of the cameras is adapted to the distribution of the grid cells of the grid to be inspected, so that each camera can be aligned with one grid cell.

6. The automatic detection apparatus for grid defects of claim 1, further comprising a controller;