CN113804527A - Neutron tomography resolution test piece and core body manufacturing method thereof - Google Patents
Neutron tomography resolution test piece and core body manufacturing method thereof Download PDFInfo
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- CN113804527A CN113804527A CN202111104387.1A CN202111104387A CN113804527A CN 113804527 A CN113804527 A CN 113804527A CN 202111104387 A CN202111104387 A CN 202111104387A CN 113804527 A CN113804527 A CN 113804527A
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- resolution
- core body
- marking
- test piece
- stripes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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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
Abstract
The invention discloses a neutron tomography resolution test piece, which comprises: the base, the core and the cover; the base and the sealing cover are combined to form a hollow cavity, the core body is arranged in the hollow cavity formed by combining the base and the sealing cover, a plurality of resolution marking stripes with different widths are distributed on the surface of the core body, and the number of the core bodies can be set according to actual requirements; the core body manufacturing method disclosed by the invention comprises the steps of firstly preparing resolution mark sheets with different widths, then bonding the multi-component resolution mark sheets in a U-shaped groove at intervals by using a bonding agent, and finally cutting resolution mark stripes; the test piece disclosed by the invention adopts the resolution marking stripes with different widths to meet the different resolution test requirements of cold neutron or thermal neutron tomography, adopts the combination of a plurality of test piece cores to expand the dynamic test range of resolution, and has strong applicability.
Description
Technical Field
The invention belongs to the field of neutron nondestructive testing, and particularly relates to a neutron tomography resolution testing piece and a core body manufacturing method thereof.
Background
Similar to X-ray tomography, cold neutron or thermal neutron tomography uses neutron rays of corresponding segments to obtain transmission projection images of a detected object from different angles, and then uses the projection images at different angles to invert a three-dimensional detection image and a two-dimensional slice image of a sample through a tomography reconstruction algorithm, so as to obtain the internal structure or defect information of the detected object, and the imaging level of a neutron tomography device and the quality of the tomography reconstruction algorithm jointly determine the quality of the neutron tomography.
The quality of neutron tomography is usually dequantized by using a neutron tomography resolution test piece, namely, transmission projection images of the test piece at different angles are obtained on a neutron tomography device, then a three-dimensional detection image and a two-dimensional slice image are reconstructed by a tomography reconstruction algorithm, and the numerical value of the resolution is interpreted from the image. Currently, the resolution test piece for neutron tomography generally has a cylindrical body, holes with different apertures are drilled in the cylindrical body, and then feature markers are inserted into the holes. Because the current test piece is influenced by a processing technology, the minimum aperture and the mark are usually about 200 mu m, however, with the development of a neutron tomography technology, the resolution of the neutron tomography technology reaches dozens of micrometers, and the resolution of a high-resolution neutron micro tomography technology can even reach micron level, so the current resolution test piece can not meet the use requirement.
Therefore, a neutron tomography resolution test piece with higher resolution is needed to adapt to the development of neutron imaging technology.
Disclosure of Invention
In view of this, the present invention provides a neutron tomography resolution test piece and a core body manufacturing method thereof, where the test piece can meet the high resolution test requirement of cold neutron or thermal neutron tomography, and the test piece has a large resolution test range.
In order to achieve the purpose, the invention adopts the following technical scheme: a neutron tomography resolution test piece, the test piece comprising: the base, the core and the cover; the base is a cylinder with a hollow cavity, and the core is a cylinder and is placed in the hollow cavity of the base; the sealing cover is a cylinder with a hollow cavity, wherein the hollow cavity is sleeved on the core body and is matched with the base to package the core body; and a plurality of resolution mark stripes are distributed on the outer side of the core body cylinder.
Preferably, the resolution mark stripes have different stripe widths.
Preferably, the core is one or more.
A method of making a core of a neutron tomography resolution test piece, the method comprising:
s1: plating a marking material on the base material, then plating the base material with the same thickness as the marking material on the marking material, and repeating the operation for 5 times to form uniformly distributed resolution marking pieces;
s2: manufacturing resolution mark sheets with different stripe widths according to the method of the step S1;
s3: placing a plurality of groups of resolution marking pieces into a U-shaped groove made of a base material, spacing the resolution marking pieces with different stripe widths by using the base material, and uniformly coating a binder between the resolution marking pieces and the U-shaped groove and between the resolution marking pieces and the spacing material for bonding;
s4: pressing the resolution marking sheet and the U-shaped groove through a pressing piece on the U-shaped groove until the bonding agent is dried;
s5: after the binder is dried, cutting the U-shaped groove and the resolution mark stripes which are bonded into a whole into thin slices, wherein each thin slice is provided with a plurality of groups of resolution mark stripes with different stripe widths;
s4: cutting the slice, and cutting a plurality of groups of resolution marking stripes with different stripe widths on the slice into independent resolution marking stripes;
s5: and embedding the resolution mark stripes into the grooves on the surface of the cylindrical core body to obtain the core body of the test piece.
Preferably, the marker material is gadolinium.
The invention has the beneficial effects that: the invention discloses a neutron tomography resolution test piece, which adopts resolution marking stripes with different widths to meet different resolution test requirements of cold neutron or thermal neutron tomography, and adopts a plurality of test piece core body combinations to expand the dynamic test range of resolution; the core body manufacturing method of the neutron tomography resolution test piece is simple and easy to operate, and solves the manufacturing problem of the high-resolution characteristic marker.
Drawings
FIG. 1 is a schematic structural diagram of a resolution test piece for neutron tomography according to the present invention;
FIG. 2 is a schematic structural view of a U-shaped groove in which resolution mark stripe pieces with different widths are assembled;
FIG. 3 is a schematic structural diagram of a cut slice obtained after cutting the U-shaped groove and the resolution mark stripes;
FIG. 4 is a schematic view of a resolution marking stripe structure obtained by the core body manufacturing method disclosed in the present invention;
FIG. 5 is a core of a test piece with resolution marking stripes embedded therein;
in the figure: 1. the base 2, the core 3, the cover 4 and the resolution mark stripe.
Detailed Description
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
The invention is described in detail below with reference to the figures and specific embodiments.
A neutron tomography resolution test piece as illustrated in fig. 1, the test piece comprising: the base, the core and the cover; the base is a cylinder with a hollow cavity, and the core is a cylinder and is placed in the hollow cavity of the base; the sealing cover is a cylinder with a hollow cavity, wherein the hollow cavity is sleeved on the core body and is matched with the base to package the core body; a plurality of resolution mark stripes are distributed on the outer side of the core body cylinder, the stripe widths of the resolution mark stripes are different to meet different resolution test requirements of cold neutron or thermal neutron tomography, one or more resolution mark stripes can be arranged on the core body according to requirements, the resolution mark stripes with different widths embedded on the surface of the core body are increased, so that the requirement of the cold neutron or thermal neutron tomography on higher resolution test is met, and the dynamic test range of the resolution is expanded.
A method for manufacturing a neutron tomography resolution test piece core, the method comprising:
firstly plating a marking material on a base material, then plating the base material with the same thickness as the marking material on the marking material, repeating the operation for 5 times to form resolution marking pieces with uniform thickness, wherein the base material and the marking material are periodically arranged; manufacturing resolution mark sheets with different stripe widths according to the same method;
then, as shown in fig. 2, a plurality of groups of resolution marking pieces are placed in a U-shaped groove made of a base material, the resolution marking pieces with different stripe widths are spaced by the base material, and adhesives are uniformly coated between the resolution marking pieces and the U-shaped groove and between the resolution marking pieces and the spacing material for bonding; then, the resolution marking piece and the U-shaped groove are pressed through a pressing piece on the U-shaped groove, and the binder is dried; after the adhesive is dried, cutting the U-shaped groove and the resolution marking stripes which are bonded into a whole into sheets as shown in figure 3, wherein each sheet is provided with a plurality of groups of resolution marking stripes with different stripe widths; cutting the sheet, and cutting a plurality of groups of resolution marking stripes with different stripe widths on the sheet into independent resolution marking stripes, as shown in fig. 4;
finally, resolution mark stripes with different stripe widths are embedded in the grooves on the surface of the cylindrical core body, and the core body of the test piece is obtained, as shown in fig. 5.
Claims (5)
1. A neutron tomography resolution test piece, the test piece comprising: the device comprises a base (1), a core body (2) and a sealing cover (3); the base (1) is a cylinder with a hollow cavity, and the core body (2) is a cylinder and is placed in the hollow cavity of the base (1); the sealing cover (3) is a cylinder with a hollow cavity, wherein the hollow cavity is sleeved on the core body (2) and is matched with the base (1) to package the core body (2); a plurality of resolution mark stripes (4) are distributed on the outer side of the cylinder of the core body (2).
2. The neutron tomography resolution test piece according to claim 1, wherein the resolution mark stripes (4) have stripe widths that are different from each other.
3. The neutron tomography resolution test piece according to claim 2, wherein the core (2) is one or more.
4. A method for manufacturing a core body of a neutron tomography resolution test piece is characterized by comprising the following steps:
s1: plating a marking material on the base material, then plating the base material with the same thickness as the marking material on the marking material, and repeating the operation for 5 times to form uniformly distributed resolution marking pieces;
s2: manufacturing resolution mark sheets with different stripe widths according to the method of the step S1;
s3: placing a plurality of groups of resolution marking pieces into a U-shaped groove made of a base material, spacing the resolution marking pieces with different stripe widths by using the base material, and uniformly coating a binder between the resolution marking pieces and the U-shaped groove and between the resolution marking pieces and the spacing material for bonding;
s4: pressing the resolution marking sheet and the U-shaped groove through a pressing piece on the U-shaped groove until the bonding agent is dried;
s5: after the binder is dried, cutting the U-shaped groove and the resolution mark stripes which are bonded into a whole into thin slices, wherein each thin slice is provided with a plurality of groups of resolution mark stripes with different stripe widths;
s4: cutting the slice, and cutting a plurality of groups of resolution marking stripes with different stripe widths on the slice into independent resolution marking stripes;
s5: and embedding the resolution mark stripe on the cylindrical core body to obtain the core body.
5. The method of claim 4, wherein the marking material is gadolinium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111104387.1A CN113804527B (en) | 2021-09-18 | 2021-09-18 | Neutron tomography resolution test piece and core body manufacturing method thereof |
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| CN202111104387.1A CN113804527B (en) | 2021-09-18 | 2021-09-18 | Neutron tomography resolution test piece and core body manufacturing method thereof |
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| CN113804527A true CN113804527A (en) | 2021-12-17 |
| CN113804527B CN113804527B (en) | 2023-05-05 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519728A (en) * | 2018-02-12 | 2018-09-11 | 北京工业大学 | A kind of high resolution ratio digital holographic Diffraction tomography |
| CN111141430A (en) * | 2019-12-23 | 2020-05-12 | 陕西电器研究所 | Film core body sealing assembly in sputtering film pressure sensor and preparation thereof |
-
2021
- 2021-09-18 CN CN202111104387.1A patent/CN113804527B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519728A (en) * | 2018-02-12 | 2018-09-11 | 北京工业大学 | A kind of high resolution ratio digital holographic Diffraction tomography |
| CN111141430A (en) * | 2019-12-23 | 2020-05-12 | 陕西电器研究所 | Film core body sealing assembly in sputtering film pressure sensor and preparation thereof |
Non-Patent Citations (3)
| Title |
|---|
| HEYONG HUO等: "Development of Cold Neutron Radiography Facility (CNRF) based on China Mianyang Research Reactor (CMRR)", 《NUCLEAR INST. ANDMETHODS IN PHYSICS RESEARCH, A》 * |
| 尹伟等: "基于小型加速器中子源的快中子层析 实验研究", 《核技术》 * |
| 王俊夫等: "三维集成成像显示系统分辨率的测试模型设计", 《光子学报》 * |
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| CN113804527B (en) | 2023-05-05 |
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