CN109990706A - The on-line measuring device and method of fuel pellet apparent size - Google Patents
The on-line measuring device and method of fuel pellet apparent size Download PDFInfo
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- CN109990706A CN109990706A CN201910243908.8A CN201910243908A CN109990706A CN 109990706 A CN109990706 A CN 109990706A CN 201910243908 A CN201910243908 A CN 201910243908A CN 109990706 A CN109990706 A CN 109990706A
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- 239000008188 pellet Substances 0.000 title claims abstract description 445
- 239000000446 fuel Substances 0.000 title claims abstract description 335
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims description 47
- 230000011218 segmentation Effects 0.000 claims description 27
- 238000012216 screening Methods 0.000 claims description 26
- 230000003068 static effect Effects 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000010998 test method Methods 0.000 claims description 13
- 230000001276 controlling effect Effects 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 15
- 230000032258 transport Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000005498 polishing Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000320 mechanical mixture Substances 0.000 description 1
- FLDALJIYKQCYHH-UHFFFAOYSA-N plutonium(IV) oxide Inorganic materials [O-2].[O-2].[Pu+4] FLDALJIYKQCYHH-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/06—Devices or arrangements for monitoring or testing fuel or fuel elements outside the reactor core, e.g. for burn-up, for contamination
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The present invention provides the on-line measuring device and method of a kind of fuel pellet apparent size.The on-line measuring device includes: pellet rotary unit, for driving the fuel pellet for being located at the first predeterminated position at the uniform velocity to rotate around its axis；Pellet circumferential surface shooting unit, for being continuously shot the circumferential surface of fuel pellet during fuel pellet rotates to obtain the complete image of circumferential surface；Pellet transports unit, for fuel pellet to be transported to the second predeterminated position from the first predeterminated position automatically；Pellet end face shooting unit, for shooting the end face for being located at the fuel pellet of the second predeterminated position to obtain the complete image of end face；Image processing unit is handled for the complete image respectively to the complete image of circumferential surface and end face, to obtain and export length, outer diameter, center bore and the chamfer dimesion of fuel pellet.The present invention is capable of the detection of automatic, efficient, the high-precision outer diameter, length, center bore and chamfer dimesion for completing MOX fuel ball, and good compatibility.
Description
Technical field
The present invention relates to nuclear fuel element detection technique fields, and in particular to a kind of online inspection of fuel pellet apparent size
Survey device and a kind of online test method of fuel pellet apparent size.
Background technique
MOX fuel ball is with UO2Powder and PuO2Powder is raw material, by made of mechanical mixture, compacting and sintering
Ceramic body is widely used in presurized water reactor and fast reactor as nuclear fuel.
MOX fuel ball in the production process with complete after, being easy to make pellet due to being sintered, transport etc.
Length, outer diameter, center bore, chamfering equidimension are there is a situation where exceeding product index, while the defects of pellet fracture can also draw
Play the change of pellet size.The apparent size of MOX fuel ball is exceeded, on the one hand can cause pellet in fuel rod tubulature technique
Some problems in the process, on the other hand during reactor operation, the exceeded of fuel ball apparent size can cause fuel
Stick involucrum uneven heating leads to clad failure to cause the generation of nuclear accident.Just because of this, before fuel rod tubulature
It is necessary to ensure that the apparent size of each MOX fuel ball meets its technical requirement, it is therefore necessary to fire to all MOX cores
Expect that pellet carries out 100% visual examination, to ensure the safe operation of reactor.The product size of MOX fuel ball has
Stringent product requirement, meanwhile, UO of the MOX fuel ball with respect to presurized water reactor2Size is smaller for fuel pellet, therefore to inspection
The required precision of survey is higher.
Due to the hot of MOX fuel ball and the hypertoxicity of Pu element, entire on-line measuring device must be installed
In glove box, manual intervention can not be carried out, this is greatly to test to the compatibility of on-line measuring device.Moreover, existing MOX
The apparent size detection scheme of fuel ball, which is only able to achieve, detects the outer diameter of MOX fuel ball, can not detect core
Length, center bore and chamfer dimesion of block etc., and detection efficiency is lower, is unable to satisfy MOX fuel ball industrial production
The demand of line.
Therefore, this field needs automatic, efficient, the high-precision detection scheme of one kind to complete MOX fuel ball appearance
The detection of size, the program can not only detect the outer diameter of MOX fuel ball, moreover it is possible to detect MOX fuel ball length, in
Heart aperture and chamfer dimesion, and good compatibility.
Summary of the invention
The present invention is completed in order at least partly solve the technical problems existing in the prior art.
Solving technical solution used by present invention problem is:
The present invention provides a kind of on-line measuring device of fuel pellet apparent size comprising: pellet rotary unit, pellet
Circumferential surface shooting unit, pellet transhipment unit, pellet end face shooting unit, image processing unit and control unit；The pellet rotation
Turn unit for driving the fuel pellet for being located at the first predeterminated position at the uniform velocity to rotate around its axis；The pellet circumferential surface shooting unit
For being continuously shot the circumferential surface of fuel pellet during fuel pellet rotates, to obtain the complete graph of fuel pellet circumferential surface
Picture；The pellet transhipment unit is used to fuel pellet being transported to the second predeterminated position automatically from the first predeterminated position；The core
Block end face shooting unit is used to shoot the end face of the fuel pellet positioned at the second predeterminated position, to obtain the complete of fuel pellet end face
Whole image；Complete graph of the described image processing unit for the complete image to fuel pellet circumferential surface and fuel pellet end face respectively
As being handled, to obtain and export length, outer diameter, center bore and the chamfer dimesion of fuel pellet；Described control unit is used
It is acted in the transhipment of the revolving speed, pellet transhipment unit of the start and stop and fuel pellet for controlling the pellet rotary unit, and
The shooting of the pellet circumferential surface shooting unit and pellet end face shooting unit.
Optionally, described image processing unit includes:
Carrying out image threshold segmentation module, for respectively to fuel pellet circumferential surface complete image and fuel pellet end face it is complete
Image carries out Threshold segmentation processing；
Judgment module, for judging complete image and the fuel pellet end face of fuel pellet circumferential surface according to Threshold segmentation result
Complete image in determined without fuel pellet in image if fuel pellet is not present in the two with the presence or absence of fuel pellet, if
There is fuel pellet in the two, then determine there is fuel pellet in image；
Output module, for exporting the conclusion in image whether there is or not fuel pellet.
Optionally, described image processing unit further include: preprocessing module, for the complete image to fuel pellet circumferential surface
Median filter process is carried out with the complete image of fuel pellet end face；Described image Threshold segmentation module is specifically used for, right respectively
The complete image of fuel pellet circumferential surface after median filtering and the complete image of fuel pellet end face carry out at Threshold segmentation
Reason.
Optionally, described image processing unit further include:
Initial alignment module, the complete image for complete image and fuel pellet end face respectively to fuel pellet circumferential surface
Initial alignment is carried out, to determine the centre coordinate of target object；
It is emerging to establish multiple senses for the centre coordinate according to target object on target object for candidate boundary point searching module
Interesting area, and search corresponding candidate boundary point pair in each region of interest, including length boundary point pair, outer diameter boundary point pair, in
Heart hole boundary point pair and chamfering boundary point pair；
Boundary point screening module for calculating the distance between every group of candidate boundary point centering two o'clock, then selects out occurrence
The most distance value of number, retains the candidate boundary point for meeting the distance value, and as the boundary point pair after screening；
Computing module, for calculating the length of fuel pellet, outer diameter, center bore according to the boundary point pair after screening and falling
Angle square cun；
The output module is also used to, and exports the calculated result of computing module.
Optionally, the on-line measuring device further include: pellet positioning unit is located at second predetermined position,
For after fuel pellet is transported to second predetermined position, keeping fuel pellet static and positioning, and make fuel pellet
End face to be measured is right against pellet end face shooting unit.
Optionally, the pellet positioning unit includes: pellet static immobilization device and its regulating mechanism；The pellet is static
Positioning device keeps fuel pellet static and is located in second predetermined position for receiving fuel pellet；The pellet
Static immobilization device regulating mechanism is used to adjust horizontal position and the vertical position of fuel pellet, so that it is right against the pellet
End face shooting unit, and be located in the shooting field range of pellet end face shooting unit.
Optionally, the pellet rotary unit includes: rotating device and its regulating mechanism；The rotating device is for driving
Fuel pellet is at the uniform velocity rotated around its axis；The rotating device regulating mechanism is used to adjust the horizontal position of fuel pellet, so that
In its shooting field range for being located at the pellet circumferential surface shooting unit.
Optionally, the pellet circumferential surface shooting unit includes: camera, camera lens, light source, camera adjustments mechanism and light source
Regulating mechanism；The camera adjustments mechanism is used to adjust orientation and relative position of the camera relative to fuel pellet, so that
The shooting axis for obtaining the camera is consistent with the axis of fuel pellet；The light source controlling mechanism is opposite for adjusting the light source
In the orientation of fuel pellet, so that the source emissioning light beam is consistent with fuel pellet axis.
Optionally, in the pellet circumferential surface shooting unit, light source uses two, the two source symmetrics are arranged in camera
Two sides.
Optionally, pellet end face shooting unit includes: camera, camera lens, light source and camera adjustments mechanism；It is described
Camera adjustments mechanism is for adjusting the orientation and relative position of the camera and the light source relative to fuel pellet, so that institute
The end face of the axis and fuel pellet of stating camera and the light source is perpendicular, and makes the working field of view of the camera and the light source
Cover the end face of entire fuel pellet.
Optionally, the on-line measuring device is placed in glove box, and is operated, repaired and more in glove box
It changes.
The present invention also provides a kind of online test methods of fuel pellet apparent size comprising following steps:
The fuel pellet that driving is located at the first predeterminated position is at the uniform velocity rotated around its axis；
It is continuously shot the circumferential surface of fuel pellet, during fuel pellet rotation to obtain the complete of fuel pellet circumferential surface
Image；
Fuel pellet is transported to the second predeterminated position from first predeterminated position automatically；
Shooting is located at the end face of the fuel pellet of the second predeterminated position, to obtain the complete image of fuel pellet end face；
The complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face are handled respectively, to obtain simultaneously
Export length, center bore and the chamfer dimesion of fuel pellet.
Optionally, it after the complete image of the complete image and fuel pellet end face that obtain fuel pellet circumferential surface, also wraps
Include following steps:
The complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face carry out Threshold segmentation processing respectively；
Judged in the complete image of fuel pellet circumferential surface and the complete image of fuel pellet end face according to Threshold segmentation result
With the presence or absence of fuel pellet, if fuel pellet is not present in the two, determine without fuel pellet in image, if the two has combustion
Expect pellet, then determines there is fuel pellet in image；
Whether there is or not the conclusions of fuel pellet in output image.
Optionally, threshold value is carried out in the complete image of complete image and fuel pellet end face respectively to fuel pellet circumferential surface
Further include following steps before the step of dividing processing:
The complete image of complete image and fuel pellet end face to fuel pellet circumferential surface carries out median filter process.
Optionally, it is described it is other to the complete image of fuel pellet circumferential surface and the complete image of fuel pellet end face at
The step of reason, length, center bore and chamfer dimesion to obtain and export fuel pellet specifically:
The complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face carry out initial alignment respectively, with true
Set the goal the centre coordinate of object；
Multiple region of interest are established on target object according to the centre coordinate of target object, and search each region of interest
Interior corresponding candidate boundary point pair, including length boundary point pair, outer diameter boundary point pair, centre bore boundary point pair and chamfering boundary point
It is right；
The distance between every group of candidate boundary point centering two o'clock is calculated, then selects the most distance value of frequency of occurrence, to full
The candidate boundary point of the foot distance value is retained, and as the boundary point pair after screening；
Length, center bore and the chamfer dimesion of fuel pellet are calculated according to the boundary point pair after screening；
Export calculated result.
The utility model has the advantages that
The on-line measuring device and method of fuel pellet apparent size of the present invention can be automatic, efficient, high-precision
The detection for completing MOX fuel ball apparent size, can not only detect the outer diameter of MOX fuel ball, moreover it is possible to detect the combustion of MOX core
Expect length, center bore and the chamfer dimesion of pellet, and good compatibility.
Through live actual test, the result shows that, the present invention is to the detection accuracy of MOX fuel ball apparent size
0.1%, detection speed is not less than 40/min, and can calculate length, outer diameter, chamfering and the aperture dimension of pellet automatically,
The judgement conclusion of pellet can be also provided according to technical indicator.
Detailed description of the invention
Fig. 1 is the partial structurtes signal of the on-line measuring device for the fuel pellet apparent size that the embodiment of the present invention 1 provides
Figure；
Fig. 2 is the entire infrastructure signal of the on-line measuring device for the fuel pellet apparent size that the embodiment of the present invention 1 provides
Figure；
Fig. 3 is the structural schematic diagram of image processing unit in Fig. 2；
Fig. 4 is one of the flow chart of online test method for the fuel pellet apparent size that the embodiment of the present invention 2 provides；
Fig. 5 is the two of the flow chart of the online test method for the fuel pellet apparent size that the embodiment of the present invention 2 provides；
Fig. 6 a is the original image for the fuel pellet end face that the embodiment of the present invention 2 provides；
Fig. 6 b is image of the original image after median filtering shown in Fig. 6 a；
Fig. 6 c is image of the image after Threshold segmentation after median filtering shown in Fig. 6 b；
Fig. 7 a is to establish the schematic diagram after a region of interest on the original image shown in Fig. 6 a；
Fig. 7 b is to establish the schematic diagram after some region of interest on the original image shown in Fig. 6 a；
Fig. 7 c is to find out in each region of interest to correspond to again after establishing original image shown in Fig. 6 a whole region of interest
Candidate boundary point pair schematic diagram；
Fig. 7 d is the schematic diagram to candidate boundary point shown in Fig. 7 c to the boundary point pair obtained after screening；
Fig. 7 e is the schematic diagram of the segment boundary point pair in Fig. 7 d.
In figure: 1- fuel pellet；2- pellet rotary unit；3- pellet circumferential surface shooting unit；4- pellet positioning unit；
5- pellet end face shooting unit；6- pellet transports unit；7- pellet automatic transferring；8- rotating device；T2- rotation
Device regulating mechanism；9- camera；10- camera lens；R3-1, T3-1- camera adjustments mechanism；The first linear light source of 11-；
The linear light source controlling mechanism of R3-2, T3-2- first；The second linear light source of 12-；The second linear light source of R3-3, T3-3- is adjusted
Mechanism；13- pellet static immobilization device；T4- pellet static immobilization device regulating mechanism；14- camera；15- camera lens；
R5, T5- camera adjustments mechanism；16- annular light source；17- control unit；18- image processing unit；181- pre-processes mould
Block；182- carrying out image threshold segmentation module；183- judgment module；184- initial alignment module；185- candidate boundary point is searched
Module；186- boundary point screening module；187- computing module；188- output module.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawings and examples to this
Invention is described in further detail.
Embodiment 1:
The present embodiment provides a kind of on-line measuring devices of fuel pellet apparent size, are suitable for on-line checking various types
Fuel pellet apparent size, be particularly suitable for the apparent size of on-line checking MOX fuel ball.
As depicted in figs. 1 and 2, the on-line measuring device include: pellet rotary unit 2, pellet circumferential surface shooting unit 3,
Pellet transports unit 6, pellet end face shooting unit 5, image processing unit 18 and control unit 17.
Pellet rotary unit 2 is used to that the fuel pellet 1 positioned at the first predeterminated position to be driven at the uniform velocity to rotate around its axis, to protect
Demonstrate,prove the complete image acquisition of fuel pellet circumferential surface.Pellet circumferential surface shooting unit 3 is used for continuous during fuel pellet 1 rotates
The circumferential surface for shooting fuel pellet 1, to obtain the complete image of fuel pellet circumferential surface, and is transferred to image processing unit 18.Pellet
Transhipment unit 6 is used to fuel pellet 1 being transported to the second predeterminated position automatically from the first predeterminated position.Pellet end face shooting unit
5, for shooting the end face of the fuel pellet 1 positioned at the second predeterminated position, to obtain the complete image of fuel pellet end face, and pass
It is defeated by image processing unit 18.Image processing unit 18 is for the complete image to fuel pellet circumferential surface and fuel pellet end respectively
The complete image in face is handled, to obtain and export length, outer diameter, center bore and the chamfer dimesion of fuel pellet 1.
Control unit 17 is used to control the start and stop of pellet rotary unit 2 and the revolving speed of fuel pellet 1, pellet transhipment unit 6
Transhipment movement and pellet circumferential surface shooting unit 3 and pellet end face shooting unit 5 shooting.In other words, control unit 17 exists
To pellet rotary unit 2, pellet circumferential surface shooting unit 3, pellet end face shooting unit 5, core in entire detection device operational process
Block transports unit 6, and the operation of the pellet positioning unit 4 hereinafter referred to and switch are uniformly controlled and are cooperated,
Realize the complete acquisition to 1 appearance images of fuel pellet.
In the present embodiment, by the acquisition to fuel pellet circumferential surface complete image and end face complete image, and to this two
Width image is handled, and the outer diameter of MOX fuel ball can not only be detected, moreover it is possible to detect length, the center of MOX fuel ball
Aperture and chamfer dimesion, and good compatibility.
As shown in figure 3, image processing unit 18 specifically includes:
Carrying out image threshold segmentation module 182, for respectively to fuel pellet circumferential surface complete image and fuel pellet end face
Complete image carries out Threshold segmentation processing；
Judgment module 183, for judging the complete image and fuel pellet of fuel pellet circumferential surface according to Threshold segmentation result
Determine in image if fuel pellet is not present in the two without cartridge in the complete image of end face with the presence or absence of fuel pellet
Block determines there is fuel pellet in image if the two has fuel pellet；
Output module 188, for exporting the conclusion in image whether there is or not fuel pellet.
As shown in figure 3, image processing unit 18 further include: preprocessing module 181, for the complete of fuel pellet circumferential surface
Image and the complete image of fuel pellet end face carry out median filter process.Then carrying out image threshold segmentation module 182 is specifically used for, point
It is other that threshold value point is carried out to the complete image of the fuel pellet circumferential surface after median filtering and the complete image of fuel pellet end face
Cut processing.
As shown in figure 3, image processing unit 18 further include:
Initial alignment module 184, for respectively to fuel pellet circumferential surface complete image and fuel pellet end face it is complete
Image carries out initial alignment, to determine the centre coordinate of target object, wherein target object includes the complete of fuel pellet circumferential surface
The complete image of image and fuel pellet end face；
Candidate boundary point searching module 185 is established on target object multiple for the centre coordinate according to target object
Region of interest (ROI, Region Of Interest), and corresponding candidate boundary point pair in each region of interest is searched, including
Length boundary point pair, outer diameter boundary point pair, centre bore boundary point pair and chamfering boundary point pair；
Boundary point screening module 186, for calculating the distance between every group of candidate boundary point centering two o'clock, further according to mode
Screening method selects the most distance value of frequency of occurrence, retains the candidate boundary point for meeting the distance value, and as screening
Boundary point pair afterwards, wherein keep the on-line measuring device equally applicable to the pellet for having larger defect using mode screening method；
Computing module 187, for calculating length, the outer diameter, center bore of fuel pellet according to the boundary point pair after screening
And chamfer dimesion.
Correspondingly, output module 188 is also used to, and exports the calculated result of computing module 187.
In addition, as illustrated in fig. 1 and 2, the on-line measuring device further include: it is default to be located at second for pellet positioning unit 4
At position, for after fuel pellet 1 is transported to the second predetermined position, making fuel pellet 1 static and positioning, and make cartridge
The end face to be measured of block 1 is right against pellet end face shooting unit 5.Correspondingly, control unit 17 is also used to control pellet positioning unit 4
Location action.
As shown in Figure 1, pellet positioning unit 4 specifically includes: pellet static immobilization device 13 and its regulating mechanism T4.
Pellet static immobilization device 13 keeps fuel pellet 1 static and to be located in second default for receiving fuel pellet 1
At position.Pellet static immobilization device regulating mechanism T4 is used to adjust horizontal position and the vertical position of fuel pellet 1, so that its
It is right against pellet end face shooting unit 5, and is located in the shooting field range of pellet end face shooting unit 5.Pellet static immobilization
Device regulating mechanism T4 is also used to, and pellet static immobilization device 13 is adjusted during the on-line measuring device installation and debugging
Position and angle.
As it can be seen that the image that image processing unit 18 first shoots pellet circumferential surface shooting unit 3 and pellet end face shooting unit 5
It analyzed, handled and is calculated, obtain length, outer diameter, center bore and the chamfer dimesion of fuel pellet 1, it finally can also basis
The calculated result of fuel pellet apparent size classifies to fuel pellet and exports differentiation conclusion.
Specifically, the workflow of image processing unit 18 is as follows:
(1) initialization of detection device
Pellet rotary unit 2, pellet circumferential surface shooting unit 3, pellet positioning unit 4, pellet end face shooting unit 5 and pellet
Transhipment unit 6 is in standby.
(2) implement measurement
1 feeding of fuel pellet to be measured guarantees that fuel pellet 1 is positioned at the bat of pellet circumferential surface as on pellet rotary unit 2
It takes the photograph in the field range of unit 3.
Fuel pellet 1 in place after, control unit 17 control pellet rotary unit 2 drive fuel pellet 1 at the uniform velocity rotated,
Pellet circumferential surface shooting unit 3 cooperates the image of the revolving speed acquisition complete circumferential surface of pellet of fuel pellet 1 simultaneously.It will figure after the completion of acquisition
As data are transmitted to image processing unit 18.
Pellet transports unit 6 and fuel pellet 1 is transported to pellet positioning unit 4 from pellet rotary unit 2 automatically, and pellet is fixed
Bit location 4 makes the end face face pellet end face to be measured shooting unit 5 of fuel pellet 1, and positions to fuel pellet 1.Fuel
Pellet 1 in place after, control unit 17 control pellet end face shooting unit 5 with acquisition the complete end face of pellet image.Acquisition is completed
Image data is transmitted to image processing unit 18 afterwards.
Processing calculating is carried out by circumferential surface and end face figure like of the image processing unit 18 to above-mentioned collected fuel pellet 1.
The measuring external appearance size conclusion of the fuel pellet 1 is provided before the measurement of next fuel pellet by image processing unit 18.
(3) image processing unit 18 obtains 1 apparent size calculation procedure of fuel pellet
Illustrative fuel pellet apparent size calculation process specifically includes following procedure:
1) determination of primary condition: the circumferential surface image and end face figure like that collect fuel pellet 1 are pre-processed respectively
With carrying out image threshold segmentation processing, judge that whether there is or not pellets in image according to the result of Threshold segmentation in each image.
2) it reprocesses: carrying out the initial alignment of target object to pretreated circumferential surface image and end face figure like, determine mesh
Mark the centre coordinate of object.
3) candidate boundary point is searched: multiple region of interest are established on target object according to the centre coordinate of target object,
And corresponding candidate boundary point pair in each region of interest is searched, including length boundary point pair, outer diameter boundary point pair, center hole edge
Boundary's point to and chamfering boundary point pair.
4) screen boundary point: calculate every group of candidate boundary point to the distance between, occurrence is selected according to mode screening method
The most distance values of number, to meeting the candidate boundary point of the distance value to retaining, and as the boundary point after screening.
5) result calculates: length, outer diameter, center bore and the chamfering ruler of pellet are calculated according to the boundary point pair after screening
It is very little.
6) result exports: providing the conclusion in image whether there is or not pellet.If it is concluded that then exporting the appearance of fuel pellet to have
Size value.
As shown in Figure 1, pellet rotary unit 2 specifically includes: rotating device 8 and its regulating mechanism T2.
Rotating device 8 is for driving fuel pellet 1 at the uniform velocity to rotate around its axis.Rotating device regulating mechanism T2 is for adjusting
The horizontal position of fuel pellet 1, to be located in the shooting field range of pellet circumferential surface shooting unit 3.Rotating device is adjusted
Mechanism T2 is also used to, the horizontal position of adjusting rotating device 7 during the on-line measuring device installation and debugging.
Pellet circumferential surface shooting unit 3 specifically includes: camera 9, camera lens 10, light source 11 and 12, camera adjustments mechanism R3-
1 and T3-1 and light source controlling mechanism R3-2, T3-2, R3-3 and T3-3.Camera 9 and camera lens 10 are connected to each other, camera tune
Section mechanism R3-1 and T3-1 is integrally attached to connect with camera 9 and camera lens 10.The image of 1 circumferential surface of fuel pellet passes through camera lens
10 focus on the sensitive chip of camera 9, so that camera 9 be made to be acquired the image of 1 circumferential surface of fuel pellet.
Wherein, light source controlling mechanism R3-2 and T3-2 corresponds to light source 11, and light source controlling mechanism R3-3 and T3-3 correspond to
Light source 12.Industrial line-scan digital camera can be used in camera 9, and industrial camera lens can be used in camera lens 10, and light source 11 and 12 is preferably
Linear light sources.
Camera adjustments mechanism R3-1 and T3-1 is used to adjust orientation and relative position of the camera 9 relative to fuel pellet 1, with
So that the shooting axis of camera 9 is consistent with the axis of fuel pellet 1.Specifically, camera adjustments mechanism R3-1 be used for it is described
Camera 9 and the whole horizontal position relative to fuel pellet 1 of camera lens 10 are adjusted during line detector installation and debugging；Phase
Machine regulating mechanism T3-1 during the on-line measuring device installation and debugging for adjusting the work of camera 9 and camera lens 10
Distance and operating angle.
Light source controlling mechanism R3-2, T3-2, R3-3 and T3-3 are respectively used to adjust light source 11 and 12 relative to fuel pellet 1
Orientation so that light source 11 and 12 emit light beam it is consistent with 1 axis of fuel pellet.Specifically, light source controlling mechanism R3-2
It is whole relative to cartridge to be used to adjust light source 11 and 12 respectively during the on-line measuring device installation and debugging with R3-3
The lateral position of block 1；Light source controlling mechanism T3-2 and T3-3 for adjusting 11 He of light source respectively during device installation and debugging
12 operating distance and operating angle.
Correspondingly, control unit 17 controls pellet circumferential surface shooting unit 3 and carries out polishing and image to the circumferential surface of fuel pellet 1
Acquisition.Pellet circumferential surface shooting unit 3 matches to shoot the week of fuel pellet 1 with pellet rotary unit 2 and control unit 17
Face image, the image of shooting should be able to reflect the entire circumferential surface information of fuel pellet 1.
In the present embodiment, light source uses two, and respectively light source 11 and 12, the two source symmetrics are arranged in camera 9
Two sides, uniform polishing is carried out to the circumferential surface of fuel pellet from the two sides of camera 9, the high-luminance light beaten focuses on fuel pellet
On the axis of circumferential surface, to guarantee the brightness uniformity of pellet circumferential surface shooting area.
Pellet end face shooting unit 5 specifically includes: camera 14, camera lens 15, light source 16 and camera adjustments mechanism R5 and
T5.Camera 14 and camera lens 15 are connected to each other, and camera adjustments mechanism R5 and T5 and camera 14, camera lens 15 and light source 16 are whole
Body is connected.The image of 1 end face of fuel pellet focuses on the sensitive chip of camera 14 by camera lens 15, to make camera
The image of 14 pairs of 1 end faces of fuel pellet is acquired.
Wherein, industrial area array cameras can be used in camera 14, and industrial camera lens can be used in camera lens 15, and light source 16 is preferred
Using annular light source, to carry out polishing to pellet end face.
Camera adjustments mechanism R5 and T5 is for adjusting camera 14 and light source 16 relative to the orientation of fuel pellet 1 and opposite position
It sets, so that the axis of camera 14 and light source 16 and the end face of fuel pellet 1 are perpendicular, and makes the work of camera 14 and light source 16
Visual field covers the end face of entire fuel pellet 1.Camera adjustments mechanism R5 and T5 are also used to, and are installed and are adjusted in the on-line measuring device
The whole horizontal and vertical position of pellet end face filming apparatus 5 is adjusted during examination.
Correspondingly, control unit 17 controls pellet end face shooting unit 5 and carries out polishing and image to the end face of fuel pellet 1
Acquisition.Pellet end face shooting unit 5 matches to shoot the end face figure like of fuel pellet 1 with control unit 17.
As shown in Figure 1, pellet transhipment unit 6 includes pellet automatic transferring 7, fuel pellet 1 can be made in pellet
It is transported automatically between rotary unit 2 and pellet positioning unit 4, i.e., pellet automatic transferring 7 can make fuel pellet 1 from pellet
Rotary unit 2 is transported to pellet positioning unit 4 automatically, and fuel pellet 1 is made to be transported to pellet automatically from pellet positioning unit 4
Rotary unit 2.
In the present embodiment, the on-line measuring device can be designed as modular detection device, and can be placed in gloves
It in case, operated, repaired and is replaced in glove box.
As it can be seen that on-line measuring device described in the present embodiment being capable of automatic, efficient, high-precision completion MOX fuel ball
The detection of apparent size can not only detect the outer diameter of MOX fuel ball, moreover it is possible to detect length, the center of MOX fuel ball
Aperture and chamfer dimesion, and good compatibility.
Embodiment 2:
The present embodiment provides a kind of online test methods of fuel pellet apparent size, are suitable for on-line checking various types
Fuel pellet apparent size, be particularly suitable for the apparent size of on-line checking MOX fuel ball.
As shown in figure 4, a kind of specific embodiment as the present embodiment, the online test method include the following steps
S101 to S105.
S101. the fuel pellet that driving is located at the first predeterminated position is at the uniform velocity rotated around its axis；
S102. it is continuously shot the circumferential surface of fuel pellet, during fuel pellet rotates to obtain fuel pellet circumferential surface
Complete image；
S103. fuel pellet is transported to the second predeterminated position from the first predeterminated position automatically；
S104. shooting is located at the end face of the fuel pellet of the second predeterminated position, to obtain the complete graph of fuel pellet end face
Picture；
S105. the complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face are handled respectively, with
Obtain and export length, center bore and the chamfer dimesion of fuel pellet.
In the present embodiment, by the acquisition to fuel pellet circumferential surface complete image and end face complete image, and to this two
Width image is handled, and the outer diameter of MOX fuel ball can not only be detected, moreover it is possible to detect length, the center of MOX fuel ball
Aperture and chamfer dimesion, and good compatibility.
It further include following steps B to D between step S104 and step S105.
B. the complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face carry out at Threshold segmentation respectively
Reason；
C. the complete image of fuel pellet circumferential surface and the complete image of fuel pellet end face are judged according to Threshold segmentation result
In determined without fuel pellet in image, if the two exists if fuel pellet is not present in the two with the presence or absence of fuel pellet
Fuel pellet then determines there is fuel pellet in image；
D. whether there is or not the conclusions of fuel pellet in output image.
It further include following steps A before step B.
A. the complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face carry out median filter process.
Step S105 specifically comprises the following steps S105-1 to S105-5.
S105-1. the complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face initially determine respectively
Position, to determine the centre coordinate of target object, wherein target object includes the complete image and fuel pellet of fuel pellet circumferential surface
The complete image of end face；
S105-2. multiple region of interest (ROI, Region are established on target object according to the centre coordinate of target object
Of Interest), and corresponding candidate boundary point pair in each region of interest is searched, including length boundary point pair, outer diameter boundary
Point is to, centre bore boundary point pair and chamfering boundary point pair；
S105-3. the distance between every group of candidate boundary point centering two o'clock is calculated, selects appearance further according to mode screening method
The most distance value of number, retains the candidate boundary point for meeting the distance value, and as the boundary point pair after screening,
In, keep the online test method equally applicable to the pellet for having larger defect using mode screening method；
S105-4. length, center bore and the chamfer dimesion of fuel pellet are calculated according to the boundary point pair after screening；
S105-5. calculated result is exported.
As shown in figure 5, another specific embodiment as the present embodiment, the online test method includes following step
Rapid S201 to S214.
S201. the fuel pellet that driving is located at the first predeterminated position is at the uniform velocity rotated around its axis；
S202. it is continuously shot the circumferential surface of fuel pellet, during fuel pellet rotates to obtain fuel pellet circumferential surface
Complete image；
S203. fuel pellet is transported to the second predeterminated position from the first predeterminated position automatically；
S204. shooting is located at the end face of the fuel pellet of the second predeterminated position, to obtain the complete graph of fuel pellet end face
Picture, as shown in Figure 6 a；
S205. the complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face carry out at median filtering
Reason, as shown in Figure 6 b；
S206. the complete image to the fuel pellet circumferential surface Jing Guo median filter process and fuel pellet end face respectively is complete
Whole image carries out Threshold segmentation processing, as fig. 6 c；
S207. the complete image of fuel pellet circumferential surface and the complete graph of fuel pellet end face are judged according to Threshold segmentation result
S208 is thened follow the steps if fuel pellet is not present in the two with the presence or absence of fuel pellet as in, if the two has cartridge
Block thens follow the steps S209；
S208. determine in image without fuel pellet, and export the conclusion in image without fuel pellet, detection process terminates；
S209. determine there is fuel pellet in image, and export the conclusion for having fuel pellet in image；
S210. the complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face initially determine respectively
Position, to determine the centre coordinate of target object；
S211. as illustrated in figs. 7 a and 7b, established on target object according to the centre coordinate of target object multiple interested
Corresponding candidate boundary point pair in each region of interest is searched as shown in Figure 7 c by area (ROI, Region Of Interest), packet
Include length boundary point pair, outer diameter boundary point pair, centre bore boundary point pair and chamfering boundary point pair；
S212. the distance between every group of candidate boundary point centering two o'clock is calculated, then selects the most distance value of frequency of occurrence,
The candidate boundary point for meeting the distance value is retained, and as the boundary point pair after screening, as shown in Fig. 7 d and 7e；
S213. length, center bore and the chamfer dimesion of fuel pellet are calculated according to the boundary point pair after screening；
S214. calculated result is exported.
As it can be seen that online test method described in the present embodiment being capable of automatic, efficient, high-precision completion MOX fuel ball
The detection of apparent size can not only detect the outer diameter of MOX fuel ball, moreover it is possible to detect length, the center of MOX fuel ball
Aperture and chamfer dimesion, and good compatibility.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (15)
1. a kind of on-line measuring device of fuel pellet apparent size characterized by comprising pellet rotary unit, pellet week
Face shooting unit, pellet transhipment unit, pellet end face shooting unit, image processing unit and control unit；The pellet rotation
Unit is used to that the fuel pellet positioned at the first predeterminated position to be driven at the uniform velocity to rotate around its axis；The pellet circumferential surface shooting unit is used
In the circumferential surface for being continuously shot fuel pellet during fuel pellet rotates, to obtain the complete image of fuel pellet circumferential surface；
The pellet transhipment unit is used to fuel pellet being transported to the second predeterminated position automatically from the first predeterminated position；The pellet end
Face shooting unit is used to shoot the end face of the fuel pellet positioned at the second predeterminated position, to obtain the complete graph of fuel pellet end face
Picture；Described image processing unit for the complete image to fuel pellet circumferential surface respectively and the complete image of fuel pellet end face into
Row processing, to obtain and export length, outer diameter, center bore and the chamfer dimesion of fuel pellet；Described control unit is for controlling
Make the start and stop of the pellet rotary unit and the revolving speed of fuel pellet, the transhipment movement of pellet transhipment unit and described
The shooting of pellet circumferential surface shooting unit and pellet end face shooting unit.
2. on-line measuring device according to claim 1, which is characterized in that described image processing unit includes:
Carrying out image threshold segmentation module, the complete image for complete image and fuel pellet end face respectively to fuel pellet circumferential surface
Carry out Threshold segmentation processing；
Judgment module, for judged according to Threshold segmentation result fuel pellet circumferential surface complete image and fuel pellet end face it is complete
Determine if fuel pellet is not present in the two without fuel pellet in image, if the two in whole image with the presence or absence of fuel pellet
There is fuel pellet, then determines there is fuel pellet in image；
Output module, for exporting the conclusion in image whether there is or not fuel pellet.
3. on-line measuring device according to claim 2, which is characterized in that described image processing unit further include: pre- place
Module is managed, the complete image for complete image and fuel pellet end face to fuel pellet circumferential surface carries out median filter process；
Described image Threshold segmentation module is specifically used for, respectively the complete image to the fuel pellet circumferential surface after median filtering and combustion
Expect that the complete image of pellet end face carries out Threshold segmentation processing.
4. on-line measuring device according to claim 2, which is characterized in that described image processing unit further include:
Initial alignment module, the complete image for complete image and fuel pellet end face respectively to fuel pellet circumferential surface carry out
Initial alignment, to determine the centre coordinate of target object；
Candidate boundary point searching module is established on target object multiple interested for the centre coordinate according to target object
Area, and corresponding candidate boundary point pair in each region of interest is searched, including length boundary point pair, outer diameter boundary point pair, center
Hole boundary point pair and chamfering boundary point pair；
Boundary point screening module for calculating the distance between every group of candidate boundary point centering two o'clock, then selects frequency of occurrence most
More distance values retains the candidate boundary point for meeting the distance value, and as the boundary point pair after screening；
Computing module, for calculating length, outer diameter, center bore and the chamfering ruler of fuel pellet according to the boundary point pair after screening
It is very little；
The output module is also used to, and exports the calculated result of computing module.
5. on-line measuring device described in any one of -4 according to claim 1, which is characterized in that further include: pellet positioning is single
Member is located at second predetermined position, for making cartridge after fuel pellet is transported to second predetermined position
Block is static and positions, and the end face to be measured of fuel pellet is made to be right against pellet end face shooting unit.
6. on-line measuring device according to claim 5, which is characterized in that the pellet positioning unit includes: that pellet is quiet
State positioning device and its regulating mechanism；The pellet static immobilization device keeps fuel pellet static for receiving fuel pellet
And it is located in second predetermined position；The pellet static immobilization device regulating mechanism is used to adjust the level of fuel pellet
Position and vertical position so that it is right against pellet end face shooting unit, and are located at pellet end face shooting unit
It shoots in field range.
7. on-line measuring device described in any one of -4 according to claim 1, which is characterized in that the pellet rotary unit packet
It includes: rotating device and its regulating mechanism；The rotating device is for driving fuel pellet at the uniform velocity to rotate around its axis；The rotation
Device regulating mechanism is used to adjust the horizontal position of fuel pellet, to be located at the shooting view of the pellet circumferential surface shooting unit
In the range of field.
8. on-line measuring device described in any one of -4 according to claim 1, which is characterized in that the pellet circumferential surface shooting is single
Member includes: camera, camera lens, light source, camera adjustments mechanism and light source controlling mechanism；The camera adjustments mechanism is for adjusting
Orientation and relative position of the camera relative to fuel pellet, so that the axis of the shooting axis and fuel pellet of the camera
Line is consistent；The light source controlling mechanism is for adjusting orientation of the light source relative to fuel pellet, so that the light source is sent out
Irradiating light beam is consistent with fuel pellet axis.
9. on-line measuring device according to claim 8, which is characterized in that in the pellet circumferential surface shooting unit, light
Source uses two, the two source symmetrics are arranged in the two sides of camera.
10. on-line measuring device described in any one of -4 according to claim 1, which is characterized in that the pellet end face shooting
Unit includes: camera, camera lens, light source and camera adjustments mechanism；The camera adjustments mechanism for adjust the camera and
Orientation and relative position of the light source relative to fuel pellet, so that the axis and cartridge of the camera and the light source
The end face of block is perpendicular, and the working field of view of the camera and the light source is made to cover the end face of entire fuel pellet.
11. on-line measuring device described in any one of -4 according to claim 1, which is characterized in that the on-line measuring device
It is placed in glove box, and is operated, repaired and replaced in glove box.
12. a kind of online test method of fuel pellet apparent size, which comprises the steps of:
The fuel pellet that driving is located at the first predeterminated position is at the uniform velocity rotated around its axis；
It is continuously shot the circumferential surface of fuel pellet, during fuel pellet rotation to obtain the complete graph of fuel pellet circumferential surface
Picture；
Fuel pellet is transported to the second predeterminated position from first predeterminated position automatically；
Shooting is located at the end face of the fuel pellet of the second predeterminated position, to obtain the complete image of fuel pellet end face；
The complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face are handled respectively, to obtain and export
Length, center bore and the chamfer dimesion of fuel pellet.
13. online test method according to claim 12, which is characterized in that obtaining the complete graph of fuel pellet circumferential surface
Further include following steps after picture and the complete image of fuel pellet end face:
The complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face carry out Threshold segmentation processing respectively；
Judged in the complete image of fuel pellet circumferential surface and the complete image of fuel pellet end face according to Threshold segmentation result whether
There are fuel pellets, if fuel pellet is not present in the two, determine without fuel pellet in image, if the two has cartridge
Block then determines there is fuel pellet in image；
Whether there is or not the conclusions of fuel pellet in output image.
14. online test method according to claim 13, which is characterized in that respectively to the complete of fuel pellet circumferential surface
Further include following steps before the step of image and the complete image of fuel pellet end face carry out Threshold segmentation processing:
The complete image of complete image and fuel pellet end face to fuel pellet circumferential surface carries out median filter process.
15. online test method according to claim 13, which is characterized in that described other to the complete of fuel pellet circumferential surface
Image and the complete image of fuel pellet end face are handled, to obtain and export the length of fuel pellet, center bore and fall
The step of angle square cun specifically:
The complete image to fuel pellet circumferential surface and the complete image of fuel pellet end face carry out initial alignment respectively, to determine mesh
Mark the centre coordinate of object；
Multiple region of interest are established on target object according to the centre coordinate of target object, and search it is right in each region of interest
The candidate boundary point pair answered, including length boundary point pair, outer diameter boundary point pair, centre bore boundary point pair and chamfering boundary point pair；
The distance between every group of candidate boundary point centering two o'clock is calculated, then selects the most distance value of frequency of occurrence, it should to meeting
The candidate boundary point of distance value is retained, and as the boundary point pair after screening；
Length, center bore and the chamfer dimesion of fuel pellet are calculated according to the boundary point pair after screening；
Export calculated result.
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