CN208155850U - A kind of fluorescent magnetic particle flaw detection on-line measuring device - Google Patents
A kind of fluorescent magnetic particle flaw detection on-line measuring device Download PDFInfo
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- CN208155850U CN208155850U CN201820689967.9U CN201820689967U CN208155850U CN 208155850 U CN208155850 U CN 208155850U CN 201820689967 U CN201820689967 U CN 201820689967U CN 208155850 U CN208155850 U CN 208155850U
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Abstract
A kind of fluorescent magnetic particle flaw detection on-line measuring device and method, belong to metallurgical industry detection technique field.Device includes industrial camera lens component, camera three-dimensional holder, ultraviolet light source, holder lamp source mounting bracket, detection computer, detection computer mounting bracket, GigE gigabit Ethernet line, 220V supply lines 8.Side face method includes：The spatial position of workpiece for measurement movement and motion profile on roller-way are clearly moved, detection device is connected, is adjusted：The detection system software of starting detection computer, is arranged sensed system parameter and industrial camera parameter；Industrial camera lens component light-inletting quantity, image size and clarity are adjusted, is detected automatically.The advantage is that for detecting fluorescent magnetic particle flaw detection forging face crack, crackle of the energy detection width down to sub- mm magnitude；The interference of the approximately parallel random knife mark in image background can be overcome when detection.
Description
Technical field
The utility model belongs to metallurgical industry detection technique field, specifically provides a kind of fluorescent magnetic particle flaw detection on-line checking
Device.
Background technique
Steel forging surface fluorescence magnetic powder inspection is the important procedure in forging production, its main purpose is to detect to forge
The crackle on part surface, in order to which subsequent handling eliminates it.Existing steel forging surface fluorescence magnetic powder inspection process flow is main
Including：It gets out workpiece to be detected first, workpiece to be detected is placed on roller-way, then adds in workpiece surface to be detected spray
Add fluorescentmagnetic particle(powder), D.C. magnetic field, alternating current magnetic field, Circumferential field etc. are applied to workpiece, fluorescentmagnetic particle(powder) is made to be enriched in face crack week
It encloses, being irradiated by particular light ultraviolet light source reveals surface defect from background convexity to detect crackle by people or equipment.
There are mainly two types of methods for flaw detection at present：Artificial ocular estimate and Machine Vision Detection method.
Artificial ocular estimate is mainly empirically passed through range estimation by operator and carries out forging surface crack testing, this method
The advantages of be flexibly, but to deposit insufficient both ways：On the one hand, manual measurement labor intensity is larger, working efficiency is not high, and (operation is dark
Staff in room will toggle operation for the tens of rice of detour between two stations, and eyes will watch close workpiece table always
Face), defect information can not save, be difficult to real automate and information-based.On the other hand, in the live ring using fluorescent magnetic particle flaw detection
In border, staff is frequently subjected to ultraviolet lamp radiation, and there are safe and healthy hidden danger.
Machine Vision Detection method using camera automatic shooting image and automatically identifies defect by image processing techniques, has
Have and mitigate manual operation, improve the advantages of working efficiency, but there is also insufficient.Document (T Nishimine, O
Tsuyama,T Tanaka,H Fujiwara.Automatic magnetic particle testing system for
square billets[C],IEEE Industry Applications Conference,1995,2:1585-1590.)
Used camera resolution is lower (512 × 512) when automatic detection crackle, and 200mm × 180mm is adopted as region, Bu Nengjian
Crack width is in 1mm magnitude crackle below.Document (the lossless inspection of Cheng Wei, huang wei honor Automated Fluorescent Magnetic Particle Testing System [J]
It surveys, 2000,22 (11):When 505-508.) handled in detection crackle automatically, calculate relatively single to the image background being directed to
(without the interference of the complex backgrounds such as knife mark), width and camera resolution further for crackle do not refer to.
In terms of prior art, there are two o'clock deficiencies for existing detection method：One, 1mm width crackle below cannot be detected；
Two, the crackle under the interference of the complex backgrounds such as knife mark cannot be detected.
Summary of the invention
The purpose of this utility model is to provide a kind of fluorescent magnetic particle flaw detection on-line measuring devices, for detecting fluorescentmagnetic particle(powder)
Flaw detection forging face crack, crackle of the energy detection width down to sub- mm magnitude；The approximation in image background can be overcome flat when detection
The interference of capable random knife mark.
The device of the utility model includes industrial camera lens component 1, camera three-dimensional holder 2, ultraviolet light source 3, holder
Lamp source mounting bracket 4, detection computer 5, detection computer mounting bracket 6, GigE gigabit Ethernet line 7,220V supply lines 8,
As shown in Figure 1.
Industrial camera lens component 1 is connected with camera three-dimensional holder 2 by rotational station fast-assembled plates；Camera three-dimensional holder 2 and cloud
Desk lamp source mounting bracket 4 is connected by UNC3/8 " screw；Ultraviolet light source 3 passes through screw with holder lamp source mounting bracket 4 respectively
It is connected；Detection computer 5 is connected with detection computer mounting bracket 6 by screw；Detect computer 5 and industrial camera lens group
Part 1 is connected by GigE gigabit Ethernet line 7.The 220V supply lines 8 of 220V alternating current divides for three parallel branches, all the way and work
Industry camera lens assembly 1 is connected, and is connected all the way with detection computer 5, another way is connected with ultraviolet light source 3.
The utility model using camera resolution be not less than 2456 × 2058 CCD camera, for no more than 215mm ×
180mm's adopts as region, and the minimum crack width that can be detected is down to 0.2mm.
Detection method described in the utility model is as follows：
1. clearly moving the spatial position and motion profile that workpiece for measurement 9 moves on roller-way 10.9 surface of workpiece has a system
Column inclination knife mark (knife mark is groove, and width is from 0 to a, and for depth from 0 to b, width, height are all random)；Knife mark is relative to work
Part traffic direction angle is between c to d degree, and angle is random；The width in region captured by industrial camera is W, a height of H；
2, detection device is connected by Fig. 1, is adjusted as follows：
(1) holder lamp source mounting bracket 4 is adjusted, makes holder lamp source mounting bracket in suitable horizontal position.
(2) camera three-dimensional holder 2 is adjusted, so that industrial camera lens component 1 is reached suitable position, alignment motion roller-way is pre-
Surely it adopts as region.
(3) ultraviolet light source 3 is adjusted, adopts the alignment of ultraviolet light source 3 as region, with industrial camera lens component 1 at phase
Industrial camera lens component 1, which adopts the illumination of picture, to be guaranteed to fixed position.
3, the detection system software of starting detection computer 5, is arranged sensed system parameter and industrial camera parameter.
4,1 light-inletting quantity of industrial camera lens component, image size and clarity are adjusted.
5, (1)-(3) are detected automatically according to the following steps：
(1) it acquires 9 surface image of workpiece for measurement and saves display.
(2) processing 9 surface defect of identification decision workpiece for measurement is carried out to image.
1. the RGB color image of acquisition is converted to HSV color image first；
2. then carrying out bianry image conversion using adaptive thresholding algorithm to V image；
3. realizing the detection to image middle conductor, detection followed by Hough transform straightway fitting algorithm
The straightway of doubtful knife mark and defect out；
4. and then counting distribution of the inclination angle of the straightway of doubtful knife mark and defect at 0 ° to 180 °, root
According to the regularity of distribution, determine which is knife mark, which is defect.
5. finally, then this image is exactly defect, calculating and drawing scarce if there is also images after removing knife mark
The center of sunken minimum circle-cover, circle and radius are to mark this defect.
(3) after the completion of detecting, detection device is closed.
Detailed description of the invention
The detection device of the utility model is as shown in Figures 1 to 4,
Fig. 1 is the structure chart of utility model device.Wherein, industrial camera lens component 1, camera three-dimensional holder 2, ultraviolet
Lamp source 3, holder lamp source mounting bracket 4, detection computer 5, detection computer mounting bracket 6, image transmission data line 7,
220V supply lines 8.
Fig. 2 is the original image of utility model device acquisition.
Fig. 3 is HSV image segmentation V image.
Fig. 4 is V figure adaptive threshold image.
Fig. 5 is the defect image after utility model device image procossing.
Fig. 6 is utility model device image processing algorithm flow chart.
Specific embodiment
The device of the utility model includes industrial camera lens component 1, camera three-dimensional holder 2, ultraviolet light source 3, holder
Lamp source mounting bracket 4, detection computer 5, detection computer mounting bracket 6, GigE gigabit Ethernet line 7,220V supply lines 8.
Industrial camera lens component 1 is connected with camera three-dimensional holder 2 by rotational station fast-assembled plates；Camera three-dimensional holder 2 and cloud
Desk lamp source mounting bracket 4 is connected by UNC3/8 " screw；Ultraviolet light source 3 passes through screw with holder lamp source mounting bracket 4 respectively
It is connected；Detection computer 5 is connected with detection computer mounting bracket 6 by screw；Detect computer 5 and industrial camera lens group
Part 1 is connected by GigE gigabit Ethernet line 7.The 220V supply lines 8 of 220V alternating current divides for three parallel branches, all the way and work
Industry camera lens assembly 1 is connected, and is connected all the way with detection computer 5, another way is connected with ultraviolet light source 3.
The utility model using camera resolution be not less than 2456 × 2058 CCD camera, for no more than 215mm ×
180mm's adopts as region, and the minimum crack width that can be detected is down to 0.2mm.
Main component is as follows：Industrial camera lens component 1 selects MV-EM510C model industrial camera, M2518-
MPW225mm tight shot；Camera three-dimensional holder 2 selects MPC30P pan and tilt head；Ultraviolet light source source 3 selects 500W light efficiency purple
Outer fluorescent lamp；Holder lamp source mounting bracket is using angle steel design welding；It detects computer 5 and selects industrial control computer DA-
682；Above-mentioned apparatus is arranged near the workpiece for measurement 9 on roller-way 10, so that the optical axis of industrial camera lens component 1 and to be measured
The surface to be measured of workpiece 9 is vertical, and industrial camera just can complete display take the image on workpiece for measurement surface to be measured；Simultaneously
So that workpiece for measurement surface is completely covered in the ultraviolet light luminous energy that ultraviolet light source 3 is issued, and around energy excitating surface crackle
The magnetic powder of enrichment issues fluorescence.
It follows these steps to carry out crackle measurement：
1, the spatial position and motion profile that workpiece for measurement 9 moves on roller-way 10 are clearly moved.9 surface of workpiece has a system
Arrange inclination knife mark substantially parallel to each other (knife mark is groove, width from 0 to 1mm, depth from 0 to 1mm, adjacent knife mark interval from
0.5 arrives 1mm, and width, height and interval are all random)；Knife mark relative to workpiece traffic direction angle be 25 to 60 degree between,
Angle is random；The width in region captured by industrial camera is 200mm, a height of 150mm；
2, detection device is connected by Fig. 1, is adjusted as follows：
(1) holder lamp source mounting bracket 4 is adjusted, makes holder lamp source mounting bracket 4 in suitable position, and keep holder lamp source
Mounting bracket 4 keeps horizontal, determines that be horizontally mounted distance of the holder lamp source mounting bracket 4 apart from workpiece for measurement 9 is 500mm, erects
Straight mounting distance is 500mm.
(2) camera three-dimensional holder 2 is adjusted, so that industrial camera lens component 1 is with respect to the horizontal plane tilted down 45 °, alignment
The tested region of workpiece for measurement, by being adopted in advance as display adjustment is adopted as area size is predetermined value.
(3) ultraviolet light source 3 is adjusted, adopts source alignment as region.
3, the detection system software of starting detection computer 5, set camera resolution as 2456 × 2058, setting camera work
Operation mode is software triggering collection, other are default value.
4, rotation industrial camera aperture adjusts industrial camera light-inletting quantity, and rotation industrial camera finely tunes Focussing image clearly
Degree, makes the image quality amount of adopting of camera reach best.
5, (1)-(3) are detected automatically according to the following steps：
(1) software triggering industrial camera acquires the surface image of workpiece to be detected, shows the workpiece surface to be detected of acquisition
Image is to detection computer display and is saved in particular memory file.
(2) image of acquisition is handled, determines workpiece surface to be detected with the presence or absence of defect crack.
1. the RGB color image of acquisition is pressed formula
V=max (R, G, B)
if(H<0) H=H+360；
It is converted to HSV color image；
2. carrying out binaryzation using adaptive thresholding algorithm to V image, algorithm is as follows：
if P(i,j)<M (i, j)-T Q (i, j)=0；
Else Q (i, j)=255；
The window size B=21, h=(B-1)/2 of capture element (i, j) neighborhood, deviant adjustment amount T=20 are algorithmically public
Formula carries out bianry image conversion, the image pixel value Q (i, j) after obtaining binaryzation；
3. utilizing Hough transform straightway fitting algorithm, the parameter definition pixel step-length of HoughLineP function is set
For 1, resolution angle step-length be 1, minimum votes are 30, straightway minimum length is 25, maximum interspace is allowed to be 3.It returns
It is detected
The Vec4i type vector of the coordinate of line segment beginning and end endpoint, detects the straightway of doubtful knife mark and defect；
4. counting distribution of the straightway inclination angle at 0 ° to 180 ° to sentence if the straightway number at a certain inclination angle is greater than 3
Fixed its is knife mark and removes；Other parts are crackle.
5. the center and radius that calculate the circle of the minimum circle-cover of defect are respectively：Central point is apart from the tested region left side
123mm, central point is apart from tested region top 84mm, radius 20mm.
(3) after the completion of detecting, detection device is closed.
Claims (1)
1. a kind of fluorescent magnetic particle flaw detection on-line measuring device, which is characterized in that
Including industrial camera lens component (1), camera three-dimensional holder (2), ultraviolet light source (3), holder lamp source mounting bracket
(4), computer (5), detection computer mounting bracket (6), GigE gigabit Ethernet line (7), 220V supply lines (8) are detected；
Industrial camera lens component (1) is connected with camera three-dimensional holder (2) by rotational station fast-assembled plates；Camera three-dimensional holder (2) and
Holder lamp source mounting bracket (4) is connected by UNC3/8 " screw；Ultraviolet light source (3) respectively with holder lamp source mounting bracket (4)
It is connected by screw；Detection computer (5) is connected with detection computer mounting bracket (6) by screw；Detect computer (5) and
Industrial camera lens component (1) is connected by GigE gigabit Ethernet line (7)；The 220V supply lines (8) of 220V alternating current is divided into
Three parallel branches are connected with industrial camera lens component (1) all the way, are connected all the way with detection computer (5), another way and purple
Outer lamp source (3) is connected.
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| CN201820689967.9U CN208155850U (en) | 2018-05-09 | 2018-05-09 | A kind of fluorescent magnetic particle flaw detection on-line measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732148A (en) * | 2018-05-09 | 2018-11-02 | 冶金自动化研究设计院 | A kind of fluorescent magnetic particle flaw detection on-line measuring device and method |
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- 2018-05-09 CN CN201820689967.9U patent/CN208155850U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732148A (en) * | 2018-05-09 | 2018-11-02 | 冶金自动化研究设计院 | A kind of fluorescent magnetic particle flaw detection on-line measuring device and method |
| CN108732148B (en) * | 2018-05-09 | 2023-12-22 | 冶金自动化研究设计院 | Online detection device and method for fluorescent magnetic particle inspection |
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