CN107221364B - Nuclear fuel assembly underwater test platform and test method - Google Patents
Nuclear fuel assembly underwater test platform and test method Download PDFInfo
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- CN107221364B CN107221364B CN201710399146.1A CN201710399146A CN107221364B CN 107221364 B CN107221364 B CN 107221364B CN 201710399146 A CN201710399146 A CN 201710399146A CN 107221364 B CN107221364 B CN 107221364B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/001—Mechanical simulators
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
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- 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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- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The present invention relates to the technical field of nuclear fuel assembly, a kind of nuclear fuel assembly underwater test platform and test method are disclosed.Nuclear fuel assembly underwater test platform, including simulation water tank, analysis portion, analysis portion include transmission installation module, detection module, drive module, analysis module, and installation module includes adjustable installation platform, reflective mirror substrate, reflective mirror pedestal；Detection module includes object and video camera to be detected；Drive module includes the first actuator and the second actuator；Analysis module includes linear displacement transducer and data analysing terminal.Nuclear fuel assembly underwater test platform proposed by the present invention, pass through installation module, detection module, drive module, the analysis module in analysis portion, make it possible that nuclear fuel assembly is tested under water in this way, and provides specific design considerations for the underweater vision measuring system of subsequent Nuclear Plant.
Description
Technical field
The present invention relates to the technical field of nuclear power more particularly to a kind of nuclear fuel assembly underwater test platform and test sides
Method.
Background technique
Irradiation has significant impact to nuclear fuel performance, constitutes and challenges to power plant's operational safety.As irradiation time increases, core
The chemical behavior of fuel and involucrum can be significantly changed gradually, and influence its thermal technology and mechanical attributes, if oxygen/metal is than increasing
Thermal conductivity is caused to reduce, pellet temperature increases and irradiation creep rate increases；Nuclear fuel rod outer surface can because irradiation and temperature it is comprehensive
Cooperation is with causing involucrum to aoxidize and corrosion product deposition, and cladding tube wall thickness degree and suction hydrogen can be reduced by corroding, and eventually lead to hydrogen
Compound is precipitated, and reduces the strength of materials and ductility；Fuel assembly, involucrum and irradiation growth of screen work etc..Therefore, operation is irradiated
Fuel assembly afterwards carries out pool side inspection, tracks and supervise the fuel performance of these dynamic changes, to guarantee safe operation of power plant
It is significant, especially in the case where nuclear fuel has design alteration or fresh fuel/new material introduces, should more it keep close
Performance tracking.
Nuclear fuel assembly deformation measuring device is that fuel assembly pool side checks one of important equipment, the measurement being mainly used for
Nuclear fuel assembly critical size, such as inclination, bending, torsion and length, in order to guarantee the essence to nuclear fuel assembly deformation measurement
Degree, the mode that fuel assembly deformation is combined using Linear displacement transducer and vision measurement system mode.
Traditional nuclear fuel test platform can not all work under water, but fill in nuclear power field fuel assembly in spentnuclear fuel pond
In the environment of water.Therefore, designing a kind of test platform that nuclear fuel assembly is tested under water is urgently technology to be resolved
Problem.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of nuclear fuel assembly underwater test platform is provided
And test method, solve the problems, such as that nuclear fuel assembly can be tested under water, and be the water of subsequent Nuclear Plant
Lower vision measurement system provides specific design considerations.
The embodiment of the invention provides a kind of nuclear fuel assembly underwater test platforms, comprising: simulation water tank is set to described
The analysis portion in water tank is simulated, the analysis portion includes:
Module is installed, including the reflective mirror substrate being set on the adjustable erecting bed, and the setting reflective mirror base
Reflective mirror pedestal and camera mount on plate, the reflective mirror pedestal and the camera mount are located at the reflective mirror substrate
The same side；
Detection module, including the Underwater Camera being slidably set on the camera mount, and rotatably setting
Reflective mirror on the reflective mirror pedestal；
Drive module, it is anti-including the first driving assembly for driving the Underwater Camera mobile, and for driving
Second driving assembly of light microscopic rotation；
Analysis module, including the linear displacement transducer with the underwater camera mechatronics, and with the straight line position
The data analysing terminal of displacement sensor electrical connection.
Further, the reflective mirror substrate and the camera mount are located at the same end of the adjustable installation platform.
Further, the surface difference of the camera mount and the Underwater Camera is encapsulated.
Further, the camera shooting head of the Underwater Camera is covered with one layer of radiation-resistant oxidation film.
Further, the detection module further includes being set on the adjustable erecting bed for setting off the back of object to be measured
Scape template is carved with scale on the background template.
Further, second driving assembly includes motor, worm gear and the worm screw with the worm gear, described
Worm screw connect with the reflective mirror pedestal, and the worm gear is set on the motor shaft.
Further, the linear displacement transducer includes coil rack, the primary line being distributed on the coil rack
Circle, two secondary coils and the rod core that can move freely.
Further, the straight-line displacement sensing can also be by being wirelessly electrically connected with the Underwater Camera.
The embodiment of the invention also provides a kind of test methods of nuclear fuel assembly underwater test platform, including walk as follows
It is rapid:
S01, the current measurement examination hall irradiation size of selection do not change structure member as calibrating block；
S02, object feature physical size is demarcated by scale precise measurement；
S03, reference object image is acquired by video camera, transmits signals to data analysing terminal by rectilinear transducer,
Features localization object Pixel Dimensions are measured by edge detection or manual reconnaissance mode；
S04, the physical length for calculating object plane corresponding to each TV pixel in measurement visual field；
S05, the picture size for obtaining object to be measured, calculate the actual physical size of object to be measured.
Preferably, the object to be measured includes upper tube socket and bottom nozzle and the core between upper tube socket and bottom nozzle
Fuel assembly.
Preferably, the calibration physical size of object, object plane corresponding to each TV pixel physical length be position
It is measured in air.
Preferably, realize that target is real by obtaining the bottom nozzle upper surface and the upper tube socket lower surface width measurement difference
Border physical size.
Based on the above-mentioned technical proposal, the nuclear fuel assembly underwater test platform and test method that the embodiment of the present invention proposes,
By installation module, detection module, drive module, the analysis module in analysis portion, so that nuclear fuel assembly is tested under water
To be possible, and specific design considerations is provided for the underweater vision measuring system of subsequent Nuclear Plant.
Detailed description of the invention
Fig. 1 is nuclear fuel assembly underwater test platform structure schematic diagram in the embodiment of the present invention；
Fig. 2 is that nuclear fuel assembly underwater test platform principle omits schematic diagram in the embodiment of the present invention；
Fig. 3 is camera mount structural schematic diagram in the embodiment of the present invention；
Fig. 4 is reflective mirror base construction schematic diagram in the embodiment of the present invention；
Fig. 5 a is the roll marks open defect figure of nuclear fuel assembly in the embodiment of the present invention；
Fig. 5 b is the scratch open defect figure of nuclear fuel assembly in the embodiment of the present invention；
Fig. 5 c is the bonding open defect figure of nuclear fuel assembly in the embodiment of the present invention；
Fig. 5 d is the rust staining open defect figure of nuclear fuel assembly in the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or it may be simultaneously present centering elements.When an element is known as " being connected to " another element, it can be with
It is directly to another element or may be simultaneously present centering elements.
It is only phase each other in addition, it should also be noted that, positional terms such as left and right, upper and lower in the embodiment of the present invention
It is reference to concept or with the normal operating condition of product, and should not be regarded as restrictive.Below in conjunction with tool
Realization of the invention is described in detail in body embodiment.
As shown in Figures 1 to 4, the embodiment of the present invention proposes a kind of nuclear fuel assembly underwater test platform comprising mould
Quasi- water tank 1, analysis portion 2, wherein analysis portion 2 is completely deposited in the simulation water tank for filling high boron water, and analysis portion 2 is arranged in mould
On quasi- water tank 1.Specifically, analysis portion 2 may include installation module 21, detection module 22, drive module 23, analysis module 24,
In:
Module 21 is installed, including the adjustable installation platform 211, Yi Jitong for reflective mirror substrate and camera mount to be arranged
It crosses the reflective mirror substrate 212 that a fixing piece is connected to mounting platform 211 and is provided with reflective mirror pedestal on reflective mirror substrate here
213 with camera mount 214, and reflective mirror pedestal 213, camera mount 214 are located on the side of reflective mirror substrate 212；
Camera mount is slidably arranged in including the object to be detected 221 being arranged on mounting platform in detection module 22
Underwater Camera 222 on 214, the reflective mirror 223 being rotatably set on reflective mirror pedestal 213, here, Underwater Camera
222 are fixed on the removable movable slider 232 on camera mount, and Underwater Camera 222 can be made back and forth along camera mount 214
It is axially moved；
Drive module 23, including controllable the first driving for being set to the camera pedestal top shoe 232 and moving up and down
Component (is not drawn into) in attached drawing, and controllable is set to adjust that reflective mirror 223 axially rotates on reflective mirror pedestal 213 the
Two driving assemblies (are not drawn into) in attached drawing；First driving assembly is controlled by Adjustable switch, convenient for manually grasping according to demand
Make；Second actuator drives worm gear by motor, and worm-drive causes the rotation of reflective mirror to worm screw.
Analysis module 24, linear displacement transducer (being not drawn into attached drawing) and number including being set to Underwater Camera one end
According to analysing terminal；
Above-mentioned detection module 22 is electrically connected with drive module 23 and analysis module 24.
The nuclear fuel assembly underwater test platform that the embodiment of the present invention proposes passes through the installation module 21 in analysis portion, inspection
Module 22, drive module 23, analysis module 24 are surveyed, such that nuclear fuel assembly is tested under water, and is subsequent nuclear power
The underweater vision measuring system of fuel assembly of standing provides specific design considerations.
Further, in an embodiment of the present invention, be located on can for above-mentioned reflective mirror substrate 212 and camera mount 214
One end of mounting platform 211 is adjusted, position is opposite with the object to be detected 221 being arranged on adjustable installation platform 211, convenient for subsequent
The surface of measurement, above-mentioned camera mount 214 and Underwater Camera 222 can both prevent so respectively by encapsulated processing
High boron aqueous corrosion camera mount 214, but it is underwater to prevent high boron water from penetrating into influence video camera in Underwater Camera 222
222 service life.
Further, in embodiments of the present invention, the camera of the Underwater Camera 222 described in it coats one layer of resistance to spoke
The oxidation film (being not drawn into attached drawing) penetrated, since the radiation of nuclear fuel can aggravate the service life of shortening video camera 222, in order to
The service life of Underwater Camera 222 is further increased, it can be by coating one layer of radiation-resistant oxidation film, in this way when camera is to be measured
When article is detected, nuclear radiation fuel can be reduced, it is radiated, protect camera head, extend video camera 222
Service life.
Further, in an embodiment of the present invention, above-mentioned detection module 22 further includes being set to object behind to be measured
Background template (is not drawn into) in attached drawing, and scale is carved on above-mentioned background template, here, when camera shooting is radiated at object under test,
It is subsidiary to irradiate its background template together, the length of object under test can be more accurately tested out by the scale on background template
Degree, to improve its measuring accuracy.
Further, in an embodiment of the present invention, object to be detected be by upper tube socket 2211, bottom nozzle 2213 and on
Nuclear fuel assembly 2212 between tube socket and bottom nozzle forms, by camera imaging go out the lower surface 2213 of upper tube socket 2211 with
Distance between the upper surface of bottom nozzle tests out the length of object under test.Above-mentioned object to be detected can be also other structure types,
It does not limit uniquely herein.
Further, in an embodiment of the present invention, above-mentioned adjusting Underwater Camera 222 is along camera mount 214
The first driving assembly axially moved, here, the first driving assembly are realized underwater by the sliding block on control Underwater Camera
The movement of video camera 222, sliding block at this time is removable to be fixed by fixed device, above-mentioned control Underwater Camera 222
It moves up and down and is not limited to sliding block 232, be also possible to other structures part.
Further, in an embodiment of the present invention, the sliding block can also be moved to the upper end of camera mount, then
It is fixed by fixed device, by adding reflective mirror, allows its camera lamp to penetrate its dozen on a mirror, it is made to give out light
Image is presented in mirror, if full phase is not presented in reflective mirror, full phase is presented by it in reflective mirror for fine-tuning reflective mirror.Above-mentioned reflective mirror
223 are mounted on reflective mirror pedestal 213, since the intrinsic high radioactivity of nuclear fuel assembly has larger shadow to the electrical component service life
It rings, therefore video camera direct irradiation and observes fuel assembly and can significantly shorten the service life of photographic device, it is reflective by adding
Mirror 223 avoids video camera 222 and contacts with the direct of nuclear fuel assembly, improves the service life of its video camera 222.
Further, in an embodiment of the present invention, the second driving assembly that above-mentioned control reflective mirror 223 rotates includes snail
Wheel and matched worm screw (being not drawn into attached drawing), the worm screw is linked together with reflective mirror pedestal 213, described
In the fixed rotation axis with electric machine 231 of worm gear, and worm gear is controlled by external electric machine 231, in this way, by remote
Process control electric machine 231, electric machine 231 drive worm gear rotation, and worm gear is rotated by engaging driving worm screw with worm screw, snail
Bar drives the rotation of reflective mirror pedestal, and reflective mirror may be implemented it and axially rotate, to realize the fine tuning of reflective mirror 223.By remote
The fine tuning of reflective mirror 223 is realized in journey operation, so that its camera is completed imaging to measurement object by reflective mirror 223, is avoided
It is artificial closely to operate, the injury of nuclear fuel Radiation On Human body is prevented, improving the above-mentioned driving structure of working efficiency can also be other
Structure type, do not limit uniquely herein.
Further, in an embodiment of the present invention, for above-mentioned linear displacement transducer 24 by a primary coil, two secondary
Grade coil, iron core, coil rack, the components such as shell composition, primary coil, secondary coil are distributed on coil rack, in coil
There is the rod core that can move freely in portion (attached drawing is not made).When iron core is in an intermediate position, two secondary coils are produced
Raw induced electromotive force is equal, and such output voltage is zero；When iron core is mobile in coil inside and deviates center, two
The induced electromotive force that coil generates differs, and has voltage output, and voltage swing depends on the size of displacement.Pass through electricity accordingly
Source output size determines its displacement by linear relationship, achievees the purpose that measurement.Above-mentioned linear displacement transducer can be with
It is electrically connected or is wirelessly electrically connected by wired with Underwater Camera, do not repeat here.
Further, in an embodiment of the present invention, above-mentioned nuclear fuel assembly underwater test platform is placed in equipped with high boron water
Simulation water tank in.Here, high boron water boron content with higher, the irradiation speed that nuclear fuel can be delayed to radiate test it
Influence, secondly, the condition of water quality of high boron water is preferable, impurity is less, avoids influence of the water quality to test result, improves underwater
Measurement accuracy.
In embodiments of the present invention, foregoing invention also discloses the test method of nuclear fuel assembly underwater test platform, should
Test method includes the following steps:
S01 chooses current measurement examination hall irradiation size and does not change structure member as calibrating block；
S02 demarcates object feature physical size L by scale precise measurementCalibration；
S03 acquires reference object image by video camera, transmits signals to data analysing terminal by rectilinear transducer, leads to
It crosses edge detection or manual reconnaissance mode measures features localization object Pixel Dimensions nPicture；
S04 calculates the physical length of object plane corresponding to each TV pixel in measurement visual field: DEquivalent=LCalibration/nPicture；
The picture size n of S05 acquisition object to be measuredTarget, calculate the actual physical size L of object to be measuredTarget=nTarget×
DEquivalent。
Preferably, in embodiments of the present invention, it chooses current measurement examination hall irradiation size and does not change structure member as mark
Determine block, it is preferable that the projection section that tube socket is not contacted with nuclear fuel assembly in selection is demarcated as calibrating block by aquatic measurement
The width L of objectCalibration, then, feature block transverse width pixel is obtained by self-developed vision measurement software caliper tool measurement
Size.Pixel equivalent actual value D is sought by pixel equivalent calculation formulaEquivalent=LCalibration/nPicture.When actual measurement, pixel equivalent is surveyed
Magnitude can change as the distance between video camera and measuring surface change, in order to determine the pass between pixel equivalent and object distance
System, by demarcating video camera to pixel equivalent respectively from remote and nearly four installation sites by apart from upper bottom nozzle surface
(referring to table 1).
It can be seen from Table 1 that object distance variation, i.e. observed range are different, to pixel in the case where other conditions are constant
The calibration result influence of equivalent is very big, and observed range is closer, and pixel equivalent is smaller, therefore, when measuring surface is not overlapped with calibration face
When, measurement error is inevitably generated, therefore in actual field measurement, the distance between calibration face and measuring surface should be made to the greatest extent
Measure it is small, with reduce pixel equivalent calibration generate error.Therefore in vision measurement, after the completion of industrial camera calibration, in observation side
To theoretically irremovable.Keep object distance constant.
Pixel equivalent calibration result under the different observed ranges of table 1
Embodiment 1
In the present embodiment, the above-mentioned practical equivalent value of determination is to carry out on the water, determines final equivalent value, i.e., video camera with
The distance between determinand determines, keeps this apart from constant, its test platform is placed under water, and test underwater environment is to core combustion
Expect the influence of height measurement results, the influence due to waterborne and underwater environment to equivalent value is smaller, therefore does not consider environment pair herein
The influence of equivalent value.
Further, table 2 and table 3 respectively indicate waterborne, underwater upper bottom nozzle height difference measuring result.Here aqueous medium
For common Natural Water.Distance between fixed waterborne, underwater camera device and target, by under test platform adjustment to optimum state,
Repeatedly distance between tube socket width on nuclear fuel assembly, bottom nozzle width, upper bottom nozzle is measured, analysis vision repeats to survey
The stability of amount and the influence factor of measurement accuracy.From test result as can be seen that the present embodiment is respectively to waterborne, underwater survey
Amount result is tested, and is increased under water compared with aquatic measurement resultant error from waterborne can be seen that with subaqueous survey result, this may
It is made of since simulation water tank is using tempered glass, surrounding is transparent, and external lights have very big interference to imaging picture, it may appear that
The even phenomenon of uneven illumination causes concern feature unobvious, influences measurement accuracy.
Further, table 4 indicates that upper bottom nozzle height difference measuring is as a result, from the results, it was seen that in height under different medium
Error is significantly less than common Natural Water in the medium of boron water, this shows that measurement error can be reduced by using high boron water, mentions
High measurement accuracy.
The upper bottom nozzle height difference measuring result waterborne of table 2
The underwater upper bottom nozzle height difference measuring result of table 3
Upper bottom nozzle height difference measuring result under 4 different medium of table
Embodiment 2
In the present embodiment, using reflective mirror image-forming principle, indirect imaging test, and confirmatory measurement are carried out to target exemplar
Precision.Preferably, this test respectively measures tube socket width on nuclear fuel assembly for two kinds of situations waterborne and underwater.It will
Sliding block is moved to the upper end of camera mount, is then fixed by fixed device, is beaten and penetrated reflective by camera lamp
On mirror, make its give out light mirror present image, if full phase is not presented in reflective mirror, can according to the second driving assembly by it in reflective mirror
Full phase is presented.Table 4 and table 5 respectively indicate waterborne, underwater upper tube socket width measurements, by comparison as can be seen that reflective mirror
Imaging model is closer to the straight measurement result according to model, therefore reflective mirror imaging model is before enhancing video camera service life
It puts, measurement accuracy is within the scope of allowable error.
The upper bottom nozzle height difference measuring result waterborne of table 5
The underwater upper bottom nozzle height difference measuring result of table 6
Embodiment 3
In the present embodiment, nuclear fuel assembly test platform can also survey the integrality of nuclear fuel assembly appearance
Amount.By the manufacturing defect on nuclear fuel assembly surface, for example roll marks, scratch, bonding, rust staining are (see Fig. 5 a to 5d), reasonably
Type selecting photographic device, it is artificial to adjust photographic device parameter, image can be cleaned with photographic subjects object, realize target surface integrality
Detection.If target surface integrality is destroyed, can by camera pop one's head in detect, and using software to rejected region into
Line flag.Can significantly find out from Fig. 5 a to 5d, sample defects can be apparent it is detected go out, realize test platform energy
The possibility of enough detections for carrying out complete appearance to defect object under water.
Embodiment described above, the only specific embodiment of the invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent repair
Change, replace and improve etc., these modifications, replacement and improvement should be covered by the protection scope of the present invention.Therefore, this hair
Bright protection scope should be subject to the protection scope in claims.
Claims (10)
1. nuclear fuel assembly underwater test platform characterized by comprising be loaded with the simulation water tank of high boron water, and setting
Analysis portion in the simulation water tank, the analysis portion include:
Module is installed, including anti-on the reflective mirror substrate being set on adjustable erecting bed, and the setting reflective mirror substrate
Light microscopic pedestal and camera mount, the reflective mirror pedestal and the camera mount are located at the same of the reflective mirror substrate
Side；
Detection module, including be slidably set on the camera mount Underwater Camera, rotatably be set to it is described anti-
Reflective mirror on light microscopic pedestal and the background template for being set to the reflective mirror opposite side are carved with mark on the background template
Ruler；
Drive module, including the first driving assembly for driving the Underwater Camera mobile, and for driving reflective mirror
Second driving assembly of rotation；
Analysis module is passed including the linear displacement transducer with the underwater camera mechatronics, and with the straight-line displacement
The data analysing terminal of sensor electrical connection；
The surface of the camera mount and Underwater Camera difference is encapsulated；And the camera shooting head of the Underwater Camera is covered
It is stamped one layer of radiation-resistant oxidation film.
2. nuclear fuel assembly underwater test platform as described in claim 1, which is characterized in that the reflective mirror substrate and described
Camera mount is located at the same end of the adjustable installation platform.
3. nuclear fuel assembly underwater test platform as described in claim 1, which is characterized in that the detection module further includes setting
It is placed on the adjustable erecting bed for setting off the background template of object to be measured, is carved with scale on the background template.
4. nuclear fuel assembly underwater test platform as described in claim 1, which is characterized in that second driving assembly includes
Motor, worm gear and the worm screw with the worm gear, the worm screw connect with the reflective mirror pedestal, the worm gear setting
In on the motor shaft.
5. nuclear fuel assembly underwater test platform as described in claim 1, which is characterized in that the linear displacement transducer packet
Coil rack is included, primary coil, two secondary coils being distributed on the coil rack, and the rod-shaped iron that can move freely
Core.
6. nuclear fuel assembly underwater test platform as described in claim 1, which is characterized in that the straight-line displacement sensing and institute
Stating Underwater Camera can also be by being wirelessly electrically connected.
7. the test method of nuclear fuel assembly underwater test platform, which is characterized in that
S01, the current measurement examination hall irradiation size of selection do not change structure member as calibrating block；
S02, object feature physical size is demarcated by scale precise measurement；
S03, reference object image is acquired by video camera, transmits signals to data analysing terminal by rectilinear transducer, passes through
Edge detection or manual reconnaissance mode measure features localization object Pixel Dimensions；
S04, the physical length for calculating object plane corresponding to each TV pixel in measurement visual field；
S05, the picture size for obtaining object to be measured, calculate the actual physical size of object to be measured.
8. the test method of nuclear fuel assembly underwater test platform as claimed in claim 7, which is characterized in that the determinand
Part includes upper tube socket and bottom nozzle and the nuclear fuel assembly between upper tube socket and bottom nozzle.
9. the test method of nuclear fuel assembly underwater test platform as claimed in claim 8, which is characterized in that the calibration object
Physical size, object plane corresponding to each TV pixel physical length be to be located in air to measure.
10. the test method of nuclear fuel assembly underwater test platform as claimed in claim 8, which is characterized in that pass through acquisition
The bottom nozzle upper surface and the upper tube socket lower surface width measurement difference realize target actual physical size.
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| CN109975303B (en) * | 2017-12-28 | 2023-10-20 | 核动力运行研究所 | Device and method for hole positioning measurement and inner wall detection |
| CN110208639B (en) * | 2018-11-30 | 2022-05-13 | 中航光电科技股份有限公司 | Underwater connector testing device and testing method |
| CN110208640B (en) * | 2018-11-30 | 2022-05-13 | 中航光电科技股份有限公司 | Underwater connector testing device and testing method |
| CN110807773B (en) * | 2019-11-12 | 2023-04-11 | 中广核检测技术有限公司 | Panoramic image detection method for surface defects of nuclear power station |
| CN110853778B (en) * | 2019-11-18 | 2021-09-28 | 中国核动力研究设计院 | Irradiation device for realizing real-time measurement of axial length change of fuel element |
| CN113063358B (en) * | 2021-03-23 | 2022-07-29 | 中国核动力研究设计院 | System and method for measuring length of irradiated fuel assembly |
| CZ309882B6 (en) * | 2021-12-03 | 2024-01-10 | Centrum Výzkumu Řež S.R.O. | A method of measuring fuel assembly deformation using digital image processing from fuel inspection videos |
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| CN101855677A (en) * | 2007-10-08 | 2010-10-06 | 法国国家电力企业 | Device for inspecting a fuel rod assembly in the pool of a nuclear plant and corresponding inspection method |
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