CN-122016855-A - Valve body inner cavity defect detection device based on machine vision

CN122016855ACN 122016855 ACN122016855 ACN 122016855ACN-122016855-A

Abstract

The invention discloses a valve body inner cavity defect detection device based on machine vision, which relates to the technical field of valve body vision detection and comprises a box body, a three-shaft sliding table module and a clamping platform, wherein a sliding block of the three-shaft sliding table module is connected with a rotary cylinder, the lower end of the sliding block is fixedly connected with a detection rod, the detection rod is provided with a ventilation assembly, a positioning ring and a cleaning assembly, and a vision detection control system is also configured and electrically connected with each detection and execution part. The cleaning assembly is matched with the cleaning assembly and the air blowing and dust collecting box to clean impurities in the inner cavity, the cleaning assembly can protect and detect a camera lens, and the proximity switch realizes anti-collision protection. The vision detection control system comprises a multifunctional module, realizes image acquisition processing, defect judgment and motion control, and is also provided with a self-learning optimization module for optimizing algorithms and execution parameters. The device realizes the linkage control of cleaning, protection and detection, solves the problems of incomplete impurity cleaning, no protection structure and poor detection suitability of the traditional device, and improves the stability and accuracy of detection.

Inventors

LI YANTAO
CHEN YONG
SHI SONG
LIU CHENGLIN
LIU BO
ZHANG MING
WANG BIAO

Assignees

保定奥成机械制造有限公司

Dates

Publication Date: 20260512
Application Date: 20260326

Claims (10)

1. The valve body inner cavity defect detection device based on machine vision comprises a box body (1), a triaxial slipway module (2) fixedly installed at the upper end of the box body (1), a sliding block slidably installed on the triaxial slipway module (2) and a clamping platform (5) installed at the lower end inside the box body (1), and is characterized in that a rotary cylinder (7) is fixedly installed on one side of the sliding block, the lower end of the rotary cylinder (7) is fixedly connected with a detection rod (4) in a coaxial manner, the detection rod (4) performs circumferential rotary motion along with the rotary cylinder (7), one side of the detection rod (4) is fixedly provided with a ventilation assembly, two positioning rings (8) are fixedly sleeved on the side wall of the lower end of the detection rod (4), the two positioning rings (8) are axially distributed at intervals along the detection rod (4), and a cleaning assembly is assembled on the outer wall of the detection rod (4) between the two positioning rings (8); The device is also provided with a visual detection control system, a detection component is arranged on the detection rod (4), the visual detection control system is respectively electrically connected with the detection component, the three-shaft sliding table module (2), the rotary cylinder (7), the ventilation assembly and the cleaning assembly, the visual detection control system outputs control instructions to each execution component, linkage action control of each component is realized, detection data acquired by the detection component are received, and machine visual identification, analysis and judgment of defects in the inner cavity of the valve body are completed.
2. The machine vision-based valve body inner cavity defect detection device according to claim 1, wherein the ventilation assembly comprises a ventilation pipe (3) fixedly arranged on one side of the detection rod (4), two branch pipes which are arranged at the upper end of the ventilation pipe (3) in a communicating manner, and a plurality of through holes which are formed in the outer side of the positioning ring (8) at equal intervals.
3. The machine vision-based valve body inner cavity defect detection device according to claim 2 is characterized in that a cavity for connecting a vent pipe (3) and a through hole is formed in the detection rod (4), the upper ends of two branch pipes are fixedly arranged on the upper part of the box body (1), and electromagnetic valves (6) are fixedly arranged at the side ends of the two branch pipes.
4. The machine vision-based valve body inner cavity defect detection device according to claim 1, wherein the cleaning assembly comprises a hairbrush (9) vertically sleeved on the outer wall of the detection rod (4) between two positioning rings (8) in a sliding manner and an electric push rod (11) fixedly installed at the upper end of the hairbrush (9), and a mounting ring (12) is fixedly installed on the side wall of the detection rod (4) at the lower end of the hairbrush (9).
5. The machine vision-based valve body inner cavity defect detection device according to claim 4 is characterized in that detection cameras (10) are fixedly arranged on two sides of a fixed end of an electric push rod (11) and the lower end of a detection rod (4), and proximity switches (13) are arranged on two sides of a plurality of detection cameras (10).
6. The machine vision-based valve body inner cavity defect detection device according to claim 1, wherein a blow box and a dust collection box are fixedly arranged on two sides of the box body (1), and a plurality of fans are arranged in the blow box.
7. The machine vision-based valve body inner cavity defect detection device according to claim 1, wherein the vision detection control system comprises an image acquisition module, a data transmission module, an image processing module, a motion control module and a defect judging module, the image acquisition module is electrically connected with the detection camera (10), the data transmission module is respectively in communication connection with the image acquisition module and the image processing module, the motion control module is respectively in communication connection with the three-axis sliding table module (2), the rotary cylinder (7), the ventilation assembly and the cleaning assembly, and the defect judging module is respectively in communication connection with the image processing module and the motion control module.
8. The machine vision-based valve body cavity defect detection device is characterized in that an image acquisition module is used for acquiring valve body cavity image information shot by a detection camera (10), performing primary coding processing on the image information and then transmitting the image information to a data transmission module, and an image processing module is used for receiving the image information of the data transmission module, performing preprocessing operations of noise reduction, enhancement and segmentation on an image, and extracting characteristic information of a valve body cavity in the image.
9. The machine vision-based valve body cavity defect detection device is characterized in that a valve body cavity standard feature database is arranged in a defect judgment module, feature information extracted by an image processing module is compared with data in the standard feature database and analyzed, a defect judgment result is output, meanwhile, the judgment result is transmitted to a motion control module, and the motion control module sends a control instruction according to the defect judgment result to realize the start and stop of actions and parameter adjustment of a three-axis sliding table module (2), a rotary cylinder (7), a ventilation assembly and a cleaning assembly.
10. The machine vision-based valve body inner cavity defect detection device of claim 1 is characterized in that the vision detection control system further comprises a man-machine interaction module and a data storage module, wherein the man-machine interaction module is in communication connection with the defect judging module and the motion control module and is used for realizing input of detection parameters, real-time display of a detection process and visual output of defect judging results, and the data storage module is in communication connection with the data transmission module and the defect judging module and is used for storing original image information acquired by the image acquisition module, preprocessing data of the image processing module and final judging results of the defect judging module.

Description

Valve body inner cavity defect detection device based on machine vision Technical Field The invention relates to the technical field of valve body vision detection tools, in particular to a valve body inner cavity defect detection device based on machine vision. Background In the field of industrial manufacturing, the valve body is used as a core component of a fluid control system, and the machining quality of an inner cavity of the valve body directly determines the running safety and stability of equipment, so that accurate detection of defects of the inner cavity becomes a key link of quality control of valve body production. With the development of intelligent manufacturing technology, machine vision gradually replaces manual visual inspection by virtue of the advantages of automation, high precision and high efficiency, becomes a mainstream technology for detecting defects of the inner cavity of the valve body, and is applied to the technologies such as triaxial mobile positioning, image acquisition and analysis and the like, and further provides technical support for automatic upgrading of valve body detection, so that the requirements of industrial production lines on batch and rapid quality inspection are met. The existing valve body inner cavity machine vision detection device realizes basic automatic detection, but a plurality of technical short plates still exist, the detection process is easily interfered by impurities such as residual particles and dust in an inner cavity, the impurities can not only shield a detection lens to influence the image acquisition precision, but also scratch the lens to cause equipment damage during cleaning, meanwhile, the device lacks an anti-collision structure, the detection rod is easy to collide with the inner wall of the valve body in the moving process, the blowing, cleaning and dust extraction processes are not linked, the impurities are not thoroughly cleaned, the suitability of a detection algorithm is poor, the omission rate and the false detection rate are high, the high-precision quality detection requirement is difficult to meet, and under the pain point of the industry, the research and development of the integrated valve body inner cavity defect detection device integrating cleaning, protection and intelligent detection is needed. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a valve body inner cavity defect detection device based on machine vision. The valve body inner cavity defect detection device based on machine vision comprises a box body, a three-axis sliding table module fixedly arranged at the upper end of the box body, a sliding block slidingly arranged on the three-axis sliding table module and a clamping platform arranged at the lower end of the box body, and is characterized in that a rotary cylinder is fixedly arranged at one side of the sliding block, the lower end of the rotary cylinder is fixedly connected with a detection rod in a coaxial manner, the detection rod performs circumferential rotary motion along with the rotary cylinder, a ventilation assembly is fixedly arranged at one side of the detection rod, two positioning rings are fixedly sleeved on the side wall of the lower end of the detection rod, the two positioning rings are distributed at intervals along the axial direction of the detection rod, and a cleaning assembly is assembled on the outer wall of the detection rod between the two positioning rings; the visual detection control system is also configured, the detection component is arranged on the detection rod, the visual detection control system is respectively electrically connected with the detection component, the three-shaft sliding table module, the rotary cylinder, the ventilation assembly and the cleaning assembly, and outputs control instructions to each execution component to realize linkage action control of each component, and meanwhile, detection data acquired by the detection component are received to complete machine vision identification, analysis and judgment of defects of the inner cavity of the valve body. Preferably, the ventilation assembly comprises a ventilation pipe fixedly arranged on one side of the detection rod, two branch pipes which are arranged at the upper end of the ventilation pipe in a communicating manner and a plurality of through holes which are formed in the outer side of the positioning ring in an equidistant manner. Preferably, the inside of the detection rod is provided with a cavity for connecting the vent pipe with the through hole, the upper ends of the two branch pipes are fixedly arranged on the upper part of the box body, and the side ends of the two branch pipes are fixedly provided with electromagnetic valves. Preferably, the cleaning component comprises a hairbrush vertically sleeved on the outer wall of the detection rod between the two positioning rings in a sliding manner and an electric push rod fixedly installed