CN113804527B - 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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- CN113804527B CN113804527B CN202111104387.1A CN202111104387A CN113804527B CN 113804527 B CN113804527 B CN 113804527B CN 202111104387 A CN202111104387 A CN 202111104387A CN 113804527 B CN113804527 B CN 113804527B
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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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a neutron tomography resolution test piece, which comprises: a base, a core, and a cover; the base and the cover are combined to form a hollow cavity, the core body is arranged in the hollow cavity formed by combining the base and the cover, a plurality of resolution mark stripes with different widths are distributed on the surface of the core body, and the core body can be provided with a plurality of resolution mark stripes according to actual requirements; the manufacturing method of the core body disclosed by the invention comprises the steps of firstly preparing various resolution marking sheets with different widths, then bonding a plurality of groups of resolution marking sheets in a U-shaped groove at intervals by using an adhesive, and finally cutting resolution marking stripes; the test piece disclosed by the invention adopts the resolution mark stripes with different widths to meet the different resolution test requirements of cold neutrons or thermal neutrons tomography, and adopts the combination of a plurality of test piece cores to expand the dynamic test range of resolution, so that the applicability is strong.
Description
Technical Field
The invention belongs to the field of neutron nondestructive detection, and particularly relates to a neutron tomography resolution test piece and a core body manufacturing method thereof.
Background
Similar to X-ray tomography, neutron tomography of cold neutrons or thermal neutrons is to acquire transmission projection images of an object to be detected from different angles by utilizing neutron rays of corresponding energy segments, and then to utilize the projection images of different angles to perform three-dimensional detection images and two-dimensional slice images of a sample through a tomographic reconstruction algorithm, so that internal structure or defect information of the object to be detected is acquired, and the quality of the neutron tomography is determined by the imaging level of a neutron tomography device and the advantages and disadvantages of the tomographic reconstruction algorithm.
The quality of neutron tomography is usually dequantized by adopting a neutron tomography resolution test piece, namely transmission projection images of different angles of the neutron tomography test piece are acquired on a neutron tomography device, then a three-dimensional detection image and a two-dimensional slice image are reconstructed through a tomography reconstruction algorithm, and the value reached by the resolution is interpreted from the images. The neutron tomography resolution test piece which is commonly used at present is usually a cylinder, holes with different pore diameters are drilled in the cylinder, and then feature markers are inserted into the holes. Due to the influence of the processing technology at present, the minimum aperture and the marker are usually about 200 mu m, however, with the development of neutron tomography technology, the resolution of the method reaches tens of micrometers, and the resolution of the high-resolution neutron micro tomography technology can even reach micrometers, so that the conventional resolution test piece can not meet the use requirement.
Accordingly, there is a need for a higher resolution neutron tomography resolution test piece to accommodate the development of neutron imaging technology.
Disclosure of Invention
In view of the above, the present invention provides a neutron tomography resolution test piece and a method for manufacturing a core body thereof, wherein the test piece can meet the high resolution test requirement of cold neutron or thermal neutron tomography, and the test piece has a larger resolution test range.
To achieve the purpose, the invention adopts the following technical scheme: a neutron tomography resolution test piece, the test piece comprising: a base, a core, and a cover; the base is a cylinder with a hollow cavity, and the core body 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 and is matched with the base to encapsulate the core; 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 fabricating a core of a neutron tomography resolution test piece, the method comprising:
s1: plating a marking material on a base material, 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 sheets;
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 sheets into a U-shaped groove made of a matrix material, spacing the resolution marking sheets with different stripe widths by using the matrix material, and uniformly smearing adhesive between the resolution marking sheets and the U-shaped groove and between the resolution marking sheets and the spacing material for bonding;
s4: the resolution mark sheet and the U-shaped groove are compressed by a compressing piece on the U-shaped groove, and the adhesive is dried;
s5: after the binder is dried, cutting the U-shaped groove and the resolution mark stripes which are bonded into a whole, and cutting the U-shaped groove and the resolution mark stripes into thin slices, wherein a plurality of groups of resolution mark stripes with different stripe widths are arranged on each thin slice;
s4: cutting the sheet, and cutting a plurality of groups of resolution mark stripes with different stripe widths on the sheet into independent resolution mark stripes;
s5: and embedding the resolution mark stripes into grooves on the surface of the cylindrical core body to obtain the test piece core body.
Preferably, the marking material is gadolinium.
The beneficial effects of the invention are as follows: the invention discloses a neutron tomography resolution test piece, which adopts resolution marking stripes with different widths to meet the different resolution test requirements of cold neutrons or thermal neutrons tomography, and adopts a plurality of test piece core combinations to expand the dynamic test range of resolution; the method for manufacturing the core body of the neutron tomography resolution test piece is simple and easy to operate, and solves the manufacturing difficulty of the high resolution characteristic marker.
Drawings
FIG. 1 is a schematic diagram of a neutron tomography resolution test piece of the present invention;
FIG. 2 is a schematic diagram of a U-shaped groove structure assembled by resolution mark stripe sheets with different widths;
FIG. 3 is a schematic diagram of a cut sheet obtained after cutting a U-shaped groove and resolution mark stripes;
FIG. 4 is a schematic diagram of a resolution mark stripe structure obtained by the method of manufacturing a core body disclosed in the present invention;
FIG. 5 is a test piece core embedded with resolution mark stripes;
in the figure: 1. base 2, core 3, cover 4, resolution mark stripes.
Detailed Description
Those of ordinary skill in the art will recognize that the embodiments described herein are for the purpose of aiding the reader in understanding the principles of the present invention and should be understood that the scope of the invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific modifications and combinations from the teachings of the present disclosure without departing from the spirit thereof, and such modifications and combinations remain within the scope of the present disclosure.
The invention will now be described in detail with reference to the drawings and specific examples.
A neutron tomography resolution test piece as shown in fig. 1, the test piece comprising: a base, a core, and a cover; the base is a cylinder with a hollow cavity, the core body is a cylinder, and the core body 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 and is matched with the base to encapsulate the core; the outside of the core body cylinder distributes a plurality of resolution mark stripes, the stripe width of a plurality of resolution mark stripes is different from each other so as to meet different resolution test requirements of cold neutrons or thermal neutrons tomography, the core body can be provided with one or a plurality of resolution mark stripes with different widths embedded on the surface of the core body according to requirements, thereby meeting higher resolution test requirements of cold neutrons or thermal neutrons tomography and expanding the dynamic test range of the resolution.
A method of making 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 sheets with the periodic arrangement of the base and the marking material and uniform thickness; manufacturing resolution mark sheets with different stripe widths according to the same method;
then as shown in figure 2, a plurality of groups of resolution marking sheets are placed into a U-shaped groove made of a matrix material, the resolution marking sheets with different stripe widths are separated by the matrix material, and adhesive is uniformly smeared between the resolution marking sheets and the U-shaped groove as well as between the resolution marking sheets and the separation material for bonding; then, the resolution mark sheet and the U-shaped groove are compressed by a compressing piece on the U-shaped groove, and the adhesive is dried; after the binder is dried, cutting the U-shaped groove and the resolution mark stripes which are bonded into a whole, and cutting the U-shaped groove and the resolution mark stripes into thin slices shown in figure 3, wherein each thin slice is provided with a plurality of groups of resolution mark stripes with different stripe widths; cutting the sheet, and cutting a plurality of groups of resolution mark stripes with different stripe widths on the sheet into independent resolution mark stripes, as shown in fig. 4;
finally, the resolution mark stripes with different stripe widths are embedded in grooves on the surface of the cylindrical core body, so that the core body of the test piece is obtained, and the core body is shown in fig. 5.
Claims (3)
1. A neutron tomography resolution test piece, the test piece comprising: 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 (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 (2) and is matched with the base (1) to encapsulate the core (2); a plurality of resolution mark stripes (4) are distributed on the outer side of the cylinder of the core body (2);
the manufacturing method of the core body comprises the following steps:
s1: plating a marking material on a base material, 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 sheets;
s2: manufacturing resolution mark sheets with different stripe widths according to the method of S1;
s3: placing a plurality of groups of resolution marking sheets into a U-shaped groove made of a matrix material, spacing the resolution marking sheets with different stripe widths by using the matrix material, and uniformly smearing adhesive between the resolution marking sheets and the U-shaped groove and between the resolution marking sheets and the spacing material for bonding;
s4: the resolution mark sheet and the U-shaped groove are compressed by a compressing piece on the U-shaped groove, and the adhesive is dried;
s5: after the binder is dried, cutting the U-shaped groove and the resolution mark stripes which are bonded into a whole, and cutting the U-shaped groove and the resolution mark stripes into thin slices, wherein a plurality of groups of resolution mark stripes with different stripe widths are arranged on each thin slice;
s6: cutting the sheet, and cutting a plurality of groups of resolution mark stripes with different stripe widths on the sheet into independent resolution mark stripes;
s7: embedding the resolution mark stripes on a cylindrical core body to obtain the core body;
the stripe widths of the resolution mark stripes (4) are different.
2. The neutron tomography resolution test piece according to claim 1, characterized in that the core (2) is one or more.
3. The neutron tomography resolution test piece of claim 1, wherein the marker material is gadolinium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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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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| Application Number | Priority Date | Filing Date | Title |
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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 CN113804527A (en) | 2021-12-17 |
| CN113804527B true 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 |
|---|
| Development of Cold Neutron Radiography Facility (CNRF) based on China Mianyang Research Reactor (CMRR);Heyong Huo等;《Nuclear Inst. andMethods in Physics Research, A》;全文 * |
| 三维集成成像显示系统分辨率的测试模型设计;王俊夫等;《光子学报》;第47卷(第11期);全文 * |
| 基于小型加速器中子源的快中子层析 实验研究;尹伟等;《核技术》;第42卷(第4期);全文 * |
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| CN113804527A (en) | 2021-12-17 |
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