CN103837434A - Integrated apparatus used for measuring geometric density of uranium dioxide fuel pellet - Google Patents
Integrated apparatus used for measuring geometric density of uranium dioxide fuel pellet Download PDFInfo
- Publication number
- CN103837434A CN103837434A CN201210470751.0A CN201210470751A CN103837434A CN 103837434 A CN103837434 A CN 103837434A CN 201210470751 A CN201210470751 A CN 201210470751A CN 103837434 A CN103837434 A CN 103837434A
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- pellet
- ccd
- diameter
- optical system
- measuring device
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- 239000008188 pellet Substances 0.000 title claims abstract description 62
- FCTBKIHDJGHPPO-UHFFFAOYSA-N uranium dioxide Inorganic materials O=[U]=O FCTBKIHDJGHPPO-UHFFFAOYSA-N 0.000 title claims abstract description 13
- OOAWCECZEHPMBX-UHFFFAOYSA-N oxygen(2-);uranium(4+) Chemical compound [O-2].[O-2].[U+4] OOAWCECZEHPMBX-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 239000000446 fuel Substances 0.000 title abstract description 7
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 230000004323 axial length Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Monitoring And Testing Of Nuclear Reactors (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to an integrated apparatus used for measuring the geometric density of a uranium dioxide (UO2) fuel pellet. The integrated apparatus comprises an electronic analytical balance, a precise positioning platform fixed on the electronic analytical balance, a diameter measuring device and a height measuring device; the UO2 fuel pellet is positioned over the precise positioning platform; the diameter measuring device comprises a first LED, a first diffuser, a first collimator, a first telecentric optical system and a first HL-CCD; the height measuring device comprises a second LED, a second diffuser, a second collimator, a second telecentric optical system and a second HL-CCD; and the first HL-CCD and the second HL-CCD are connected with a computer system. The integrated apparatus realizes the simultaneous measurement of the diameter, the height and the weight of the pellet on a station, and the automatic acquisition and the database management of measured data, greatly improves the measuring efficiency of the geometric density of the pellet, realizes stable work and high repeatability, and improves the automation level of the pellet examination.
Description
Technical field
The present invention relates to a kind of for UO
2fuel pellet geometric density measure integrated apparatus, particularly relate to a kind of working stability, repeatability high, automatization level high for UO
2the integrated apparatus that fuel pellet geometric density is measured.
Background technology
UO
2pellet is by UO
2the uranium dioxide ceramic body with certain size, shape, intensity and density that powder is repressed, sintering, grinding form, its profile is as small cylindrical, according to UO
2the technical conditions requirement of pellet, need to be to the diameter of pellet, highly, weight measures, and to verify the pellet quality degree requiring that meets the specification, calculates UO by these data simultaneously
2the geometric density of pellet.UO is measured in employing at present used
2the problem of pellet geometric density method maximum is that production efficiency is low, and the probability of manually makeing mistakes is higher.First due to UO
2increasing sharply of pellet turnout, reviewer every day need to be to the diameter of pellet, highly, weight carries out the measurements of up to ten thousand times, these data be all by reviewer's manual entry in computing machine, overall inspection efficiency is lower, cannot meet the needs of output expanding day; And mass data relies on manual entry, the probability that typing makes mistakes is higher, repeatedly occurs due to the data typing quality problems that cause of makeing mistakes; In addition, to UO
2the measurement of pellet diameter and height, adopted digimatic micrometer to carry out contact in the past and directly measured, and so not only caused measuring speed slower, and after long-time frequent measurement of digimatic micrometer, easily caused measuring head wearing and tearing, produced cumulative errors.Therefore need badly and provide a kind of novel for UO
2the integrated apparatus that fuel pellet geometric density is measured.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of working stability, repeatability is high, the integrated apparatus of measuring for uranium dioxide pellet geometric density that automatization level is high.
For solving the problems of the technologies described above, a kind of integrated apparatus of measuring for uranium dioxide pellet geometric density of the present invention, comprises electronic analytical balance, is fixed on precisely locating platform and one group of diameter measuring device and one group of height measuring device on electronic analytical balance; UO
2pellet is positioned on precisely locating platform; Diameter measuring device comprises a LED, the first fan diffuser, the first collimator, the first telecentric optical system, a HL-CCD; Height measuring device comprises the 2nd LED, the second fan diffuser, the second collimator, the second telecentric optical system, the 2nd HL-CCD; The light beam that the one LED sends, through the first fan diffuser and the first collimator, irradiates UO with parallel beam
2pellet, then images in a HL-CCD through the first telecentric optical system; The light beam that the 2nd LED sends, through the second fan diffuser and the second collimator, irradiates UO with parallel beam
2pellet, then images in the 2nd HL-CCD through the second telecentric optical system; The one HL-CCD is connected with computer system with the 2nd HL-CCD.
Precisely locating platform comprises locating piece and positioning ring, and locating piece is provided with columniform projection, and the internal diameter of positioning ring is consistent with the diameter of projection, and the height of projection is less than positioning ring axial length; UO
2pellet is positioned on projection, within being positioned at positioning ring.
The first telecentric optical system and a HL-CCD entirety are placed on diameter measurement hoistable platform, realize 7mm, 5mm, tri-kinds of scanning distances of 3mm.
The present invention realized pellet diameter, highly, weight measures in a station, and automatic collection and the data base administration of measurement data, greatly improved the measurement efficiency of pellet geometric density.In-site measurement data have reduced a large amount of papery refuses after having realized with no paper at all, realize energy-saving and emission-reduction, and Green Development has been made positive contribution.By client is installed, can easily realize telemanagement, comprise inquiry, the statistics etc. of data, improve the quality management level in company, workshop.The present invention is highly stable, repeatability is high, has improved the automatization level of pellet inspection.
Brief description of the drawings
Fig. 1 is the schematic diagram of a kind of integrated apparatus of measuring for uranium dioxide pellet geometric density provided by the present invention.
Fig. 2 is the schematic diagram of locating piece and positioning ring.
In figure: 1 is cable, 2 is display controller, and 3 is PC, and 4 is a HL-CCD, 5 is the first telecentric optical system, and 6 is diameter measurement hoistable platform, and 7 is precisely locating platform, and 8 is electronic analytical balance, 9 is UO2 pellet, and 10 is the first collimator, and 11 is the first fan diffuser, 12 is server, and 13 is the 2nd HL-CCD, and 14 is the second telecentric optical system, 15 is the second collimator, and 16 is the second fan diffuser, and 17 is the 2nd LED, 18 is a LED, and 19 is locating piece, and 20 is positioning ring.Embodiment
Below in conjunction with drawings and Examples, the present invention is further detailed explanation.
The present invention includes electronic analytical balance 8, be fixed on precisely locating platform 7 and one group of diameter measuring device and one group of height measuring device on electronic analytical balance 8.
Precisely locating platform 7 comprises locating piece 19 and positioning ring 20, and locating piece 19 is provided with columniform projection, and the internal diameter of positioning ring 20 is consistent with the diameter of projection, and the height of projection is less than positioning ring 20 axial lengths; UO
2pellet 9 is positioned on projection, within being positioned at positioning ring 20.
Diameter measuring device comprises a LED18, the first fan diffuser 11, the first collimator 10, the first telecentric optical system 5, a HL-CCD4; The first telecentric optical system 5 and a HL-CCD4 entirety are placed on diameter measurement hoistable platform 6, realize 7mm, 5mm, tri-kinds of scanning distances of 3mm; Height measuring device comprises the 2nd LED17, the second fan diffuser 16, the second collimator 15, the second telecentric optical system 14, the 2nd HL-CCD13.
The light beam that the one LED18 sends, through the first fan diffuser 11 and the first collimator 10, irradiates UO with parallel beam
2pellet 9, then images in a HL-CCD4 through the first telecentric optical system 5; The light beam that the 2nd LED17 sends, through the second fan diffuser 16 and the second collimator 15, irradiates UO with parallel beam
2pellet 9, then images in the 2nd HL-CCD13 through the second telecentric optical system 14; The one HL-CCD4 and the 2nd HL-CCD13 are by cable 1 and display controller 2, and PC 3 connects.PC 3 is connected with server 12.
It is the diameter of pellet, highly that this device needs the physical dimension of measuring, by measuring pellet diameter and the height of gained, just can draw the cumulative volume of right cylinder pellet, (cavity volume is obtained by another systematic survey then to deduct chamfering and dish cavity volume partly, here be generally defaulted as constant), and then obtaining the volume of pellet, quality generally adopts electronic analytical balance 8 to measure, and utilizes density formula can calculate the geometric density of pellet.
In formula: ρ: the geometric density of pellet, g/cm
3;
M: pellet weight, g;
D: pellet diameter, cm;
H: pellet height, cm;
Vv: cavity volume, by constant calculations, cm
3.
Automatic measurement system adopts the optics method of blocking to carry out to the measurement of pellet diameter and height, measuring principle is that the radiant light that LED sends becomes the uniform directional light of certain width through scattering device and collimator camera lens, then project on pellet to be measured, because the part that pellet is light tight and self blocks presents shade.The part directional light not being blocked, the telecentric optical system that enters receiving end.The effect of telecentric optical system is only to allow directional light to see through, with the precision of guaranteeing to measure.By entering HL-CCD(high-speed linear CCD after telecentric optical system), the image of tested like this pellet is just presented at HL-CCD.Light-struck in clear zone in HL-CCD upstream, blocked by determinand in dark space, measure parameter to be measured by the edge that detects clear zone and dark space.Because the boundary between clear zone and dark space is not very clear, therefore before output parameter, must carry out rim detection, native system adopts DE(numeral rim detection) processor edge detects.After rim detection completes, carry out data processing by CPU, then data are transferred to computing machine by Serial Port Line.
Table 1 UO
2pellet diameter, height-gauge performance table
Table 2 UO
2pellet is weighed with electronic analytical balance performance table
| Measurement range | 0~120g |
| Readable | 0.1mg |
| Average response time | ≤2s |
| Repeatability | ≤±0.1mg |
| Linear | ≤±0.2mg |
Fuel ball diameter is to affect under nuclear reactor operating condition, UO
2one of mechanical interaction (PCI) factor of pellet 9 and involucrum.Pellet completes after grinding in the situation that tapering, cylindricity exist deviation, only a section in the middle of pellet is measured to the real conditions that cannot effectively reflect pellet diameter, therefore under the prerequisite of guaranteeing precision, for more accurately obtaining the measured value of pellet diameter, pellet diameter is carried out to multimetering necessary.According to light transmission formula sensor emission device, transmitting has the directional light of certain width, thereby receiver obtains the principle of dimension of object by receiving the image of its central cross-section object under test, measuring system completes the receiver of taking stepper motor drive installation on diameter measurement hoistable platform 6 scanning measurement of diameter.Ensureing, under the prerequisite of precision, can to meet 7mm, 5mm, tri-kinds of scanning distances of 3mm are selected (each distance can scan 20 points, can select maximal value, minimum value, mean value).The measurement of pellet diameter can be selected four kinds of modes, is respectively 1 point, 3mm, 5mm, 7mm measurement.
Claims (3)
1. an integrated apparatus of measuring for uranium dioxide pellet geometric density, is characterized in that: comprise electronic analytical balance, be fixed on precisely locating platform and one group of diameter measuring device and one group of height measuring device on described electronic analytical balance; Described UO
2pellet is positioned on precisely locating platform; Described diameter measuring device comprises a LED, the first fan diffuser, the first collimator, the first telecentric optical system, a HL-CCD; Described height measuring device comprises the 2nd LED, the second fan diffuser, the second collimator, the second telecentric optical system, the 2nd HL-CCD; The light beam that a described LED sends, through the first fan diffuser and the first collimator, irradiates UO with parallel beam
2pellet, then images in a described HL-CCD through the first telecentric optical system; The light beam that described the 2nd LED sends, through the second fan diffuser and the second collimator, irradiates UO with parallel beam
2pellet, then images in described the 2nd HL-CCD through the second telecentric optical system; A described HL-CCD is connected with computer system with the 2nd HL-CCD.
2. a kind of integrated apparatus of measuring for uranium dioxide pellet geometric density according to claim 1, it is characterized in that: described precisely locating platform comprises locating piece and positioning ring, described locating piece is provided with columniform projection, the internal diameter of described positioning ring is consistent with the diameter of projection, and the height of described projection is less than described positioning ring axial length; Described UO
2pellet is positioned on described projection, within being positioned at positioning ring.
3. a kind of integrated apparatus of measuring for uranium dioxide pellet geometric density according to claim 1, it is characterized in that: described the first telecentric optical system and a HL-CCD entirety are placed on diameter measurement hoistable platform, realize 7mm, 5mm, tri-kinds of scanning distances of 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210470751.0A CN103837434A (en) | 2012-11-20 | 2012-11-20 | Integrated apparatus used for measuring geometric density of uranium dioxide fuel pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210470751.0A CN103837434A (en) | 2012-11-20 | 2012-11-20 | Integrated apparatus used for measuring geometric density of uranium dioxide fuel pellet |
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| Publication Number | Publication Date |
|---|---|
| CN103837434A true CN103837434A (en) | 2014-06-04 |
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ID=50801152
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210470751.0A Pending CN103837434A (en) | 2012-11-20 | 2012-11-20 | Integrated apparatus used for measuring geometric density of uranium dioxide fuel pellet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935292A (en) * | 2015-12-31 | 2017-07-07 | 中核建中核燃料元件有限公司 | A kind of method of various enriched uranium pellet column lengths in measurement nuclear fuel rod |
Citations (4)
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|---|---|---|---|---|
| CN2599522Y (en) * | 2002-12-16 | 2004-01-14 | 国营建中化工总公司 | Automatic detection device for uranium dioxide core block |
| CN1789909A (en) * | 2005-12-20 | 2006-06-21 | 山东建筑工程学院 | Method and apparatus for measuring volume and density of small article |
| CN101660897A (en) * | 2009-09-18 | 2010-03-03 | 重庆大学 | Multi-parameter synchronous detection device of cylindrical workpiece |
| CN203241317U (en) * | 2012-11-20 | 2013-10-16 | 中核建中核燃料元件有限公司 | Integrated device for measuring geometric density of uranium dioxide fuel pellet |
-
2012
- 2012-11-20 CN CN201210470751.0A patent/CN103837434A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2599522Y (en) * | 2002-12-16 | 2004-01-14 | 国营建中化工总公司 | Automatic detection device for uranium dioxide core block |
| CN1789909A (en) * | 2005-12-20 | 2006-06-21 | 山东建筑工程学院 | Method and apparatus for measuring volume and density of small article |
| CN101660897A (en) * | 2009-09-18 | 2010-03-03 | 重庆大学 | Multi-parameter synchronous detection device of cylindrical workpiece |
| CN203241317U (en) * | 2012-11-20 | 2013-10-16 | 中核建中核燃料元件有限公司 | Integrated device for measuring geometric density of uranium dioxide fuel pellet |
Non-Patent Citations (1)
| Title |
|---|
| 萧泽新: "《光机电一体化系统及应用》", 31 October 2011, article "华南理工大学出版社2011年10月第1版第1次印刷" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935292A (en) * | 2015-12-31 | 2017-07-07 | 中核建中核燃料元件有限公司 | A kind of method of various enriched uranium pellet column lengths in measurement nuclear fuel rod |
| CN106935292B (en) * | 2015-12-31 | 2018-11-02 | 中核建中核燃料元件有限公司 | A kind of method of a variety of enriched uranium pellet column lengths in measurement nuclear fuel rod |
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Application publication date: 20140604 |