CN216979332U - Three-dimensional line resolution test body of security check equipment - Google Patents
Three-dimensional line resolution test body of security check equipment Download PDFInfo
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- CN216979332U CN216979332U CN202220747309.7U CN202220747309U CN216979332U CN 216979332 U CN216979332 U CN 216979332U CN 202220747309 U CN202220747309 U CN 202220747309U CN 216979332 U CN216979332 U CN 216979332U
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Abstract
The utility model provides a three-dimensional line resolution test body of security inspection equipment, belongs to the technical field of security inspection equipment testing, and is mainly used for testing the quality of three-dimensional images of the security inspection equipment. The utility model provides a three-dimensional line resolution test body of security inspection equipment, which comprises a test body, wherein the test body comprises a cylindrical substrate, a plurality of line-shaped grooves are carved on the surface of the cylindrical substrate, the plurality of line-shaped grooves are uniformly arranged on the surface of the cylindrical substrate along the length direction of the cylindrical substrate, and copper wires with corresponding outer diameters are arranged in each line-shaped groove. The cylindrical substrate is made of a plastic material. And the wire diameters of the wire strip-shaped grooves are different. The test body can test the resolution capability of the security inspection equipment on isolated small objects, and the continuity and the smoothness of the three-dimensional image are reflected, so that the line resolution capability of the three-dimensional image of the security inspection equipment can be tested.
Description
Technical Field
The utility model belongs to the technical field of security inspection equipment testing, and particularly relates to a three-dimensional line resolution testing body of security inspection equipment.
Background
The security inspection equipment is applied to various public places, the existing security inspection equipment for security inspection by utilizing X-rays is generally two-dimensional imaging equipment, and two-dimensional images are displayed in display equipment, so that the shape of some inspected objects in the security inspection is not accurately judged. In order to more accurately judge the detected article, a CT type security inspection apparatus is in operation. The CT type security inspection equipment performs three-dimensional reconstruction on the inspected object by using the X-ray computed tomography principle to form a three-dimensional image, and provides a basis for a security inspector to identify the internal structural characteristics of the inspected object according to the image.
Security inspection requires that each article of the inspected content be identified relatively accurately based on the shape and position information of the inspected article. For CT type security check equipment, the three-dimensional image quality is an important basis for evaluating the security check equipment, and the current security check equipment test body is only suitable for evaluating the quality of a two-dimensional X-ray image and cannot test the imaging quality of a three-dimensional image of the CT type security check equipment. Although the CT type security inspection equipment is formally put into a use state, whether the imaging of the CT type security inspection equipment to the measured object is accurate or not cannot be judged, which is a problem that needs to be solved urgently in the security inspection field related to social stability and safety of residents.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art and scientifically and intuitively test the three-dimensional image quality of the security inspection equipment, the utility model provides a three-dimensional line resolution test body of the security inspection equipment, which comprises a test body, wherein the test body comprises a cylindrical substrate, a plurality of line-shaped grooves are carved on the surface of the cylindrical substrate, the plurality of line-shaped grooves are uniformly arranged on the surface of the cylindrical substrate along the length direction of the cylindrical substrate, and copper wires with corresponding outer diameters are arranged in each line-shaped groove.
The cylindrical substrate is made of a plastic material.
And the wire diameters of the wire strip-shaped grooves are different.
And each linear groove is in a sine wave shape.
The linear grooves are uniformly arranged on the surface of the cylindrical substrate from small to large according to the linear diameter along the length direction of the cylindrical substrate.
Wherein, the outer diameter of the cylindrical substrate is 30mm to 70mm, and the length is 120mm to 200 mm.
The rectangular acrylic box body is assembled by acrylic plates; a pair of supports are fixed on the two end faces of the test body in the length direction respectively, and the test body is supported in the middle of the cuboid acrylic box body in a suspending mode through the supports.
Wherein, two hole grooves are opened respectively to the corresponding position of two relative boards of cuboid ya keli box body, and this hole groove is inserted to the one end of support to the support test body.
Compared with the prior art, the utility model has the beneficial effects that:
the test body can test the resolution capability of the security check equipment on isolated fine objects, and the continuity and the smoothness of three-dimensional images are reflected, so that the three-dimensional line resolution capability of the security check equipment can be tested.
The test body is simple and convenient to the test process of the security check equipment, only a tester needs to distinguish the copper wire with the complete image and the smallest diameter after the security check equipment to be tested is imaged, the diameter of the copper wire is the three-dimensional line resolution of the security check equipment to be tested, the test body is small and portable, and the application range and the scene are wider.
The test body has better image discrimination and stability, and can visually represent the three-dimensional image quality of equipment.
Drawings
FIG. 1 is a side schematic view of a test body;
FIG. 2 is a transverse cross-sectional view of a test body;
FIG. 3 is a schematic view of a test state of the test body;
FIG. 4 is a schematic structural view of a test body;
FIG. 5 is a schematic view of a test body with a support for encapsulation;
FIG. 6 is a flow chart of a method of using the test body test security device;
FIG. 7 is a schematic view of the test body in an expanded configuration after the outer surface of the test body is cut along a generatrix of the cylinder.
Detailed Description
While the present invention will be described in detail with reference to the following examples, it should be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the present invention.
In the indexes for evaluating the quality of the three-dimensional image of the CT type security inspection equipment, the three-dimensional line resolution is one of important indexes, the index represents the resolution capability of the CT type security inspection equipment on isolated fine objects, the three-dimensional line resolution represents the continuity and smoothness of the three-dimensional image, the higher the line resolution, the better the smoothness of the image and the lower the noise of the image.
Example 1:
as shown in fig. 1, 2 and 4, the three-dimensional line resolution test body of the security inspection equipment comprises a test body 1 and a cuboid acrylic box body (the cuboid acrylic box body is not shown in fig. 1-7) for packaging the test body 1, wherein the substrate 2 of the test body 1 is an ABS plastic cylinder with an outer diameter of 30mm to 70mm, preferably 50mm, and a length of 120mm to 200mm, preferably 166 mm; a plurality of sine wave line-shaped grooves (not shown in the figure) with different thicknesses are engraved on the surface of the ABS plastic cylinder substrate, the sine wave line-shaped grooves are uniformly arranged on the surface of the cylinder substrate along the length direction of the cylinder substrate from small to large according to the line diameter, each sine wave line-shaped groove is connected end to end on the surface of the cylinder substrate, and each sine wave line-shaped groove is in sine wave shape after the cylinder is unfolded into a plane; each sine wave line-shaped groove is internally provided with a copper wire 3 with a corresponding outer diameter, and the copper wire 3 is embedded into the line-shaped groove.
As shown in fig. 7, the shape of the copper wire 3 of the test body was: forming a sine wave shape on the surface of the cylinder; each copper wire 3 winds a whole circle on the surface of the cylinder, after the cylinder is expanded into a plane, each copper wire 3 is in a sine wave shape, the structure can embody the three-dimensional characteristic of CT imaging, and if the copper wires 3 are in a linear shape, the imaging dimension can be reduced; and the images of the sine wave type are regular, and the image judging personnel can judge whether the imaging is complete or not more easily.
The ABS plastic material is adopted for the substrate of the test body because the density difference between the ABS plastic and the copper is large, the ABS plastic and the copper are different in color in a CT three-dimensional pseudo-color image, the discrimination is large, and the copper wires 3 are easier to distinguish. The base 2 of the test body adopts a cylinder because CT scanning generally adopts an arc track; if the substrate of the test body is a cuboid, the copper wire 3 is arranged on the surface of the substrate and cannot represent three-dimensional characteristics well; if the base of the test body is conical, the radii of tangent circles on different radial lengths are different, so that the wire diameter of the copper wire 3 is no longer the only variable, and the test is inaccurate.
The wire diameters of the sinusoidal waveform linear grooves are different, and the axial cross-sectional diameters (i.e., the wire diameters) of the sinusoidal waveform linear grooves with different wire diameters may be 0.321mm, 0.254mm, 0.203mm, 0.160mm, 0.127mm, 0.102mm, and 0.0787mm, respectively. This is the size of the wire gauge design of AWG (American wire gauge), which corresponds to AWG 28, AWG 30, AWG 32, AWG 34, AWG36, AWG 38, AWG 40, respectively, and the current limit of CT wire resolution is within this range.
Because the density difference between the ABS substrate and the copper wire is large, the CT reconstructed three-dimensional image shows a large contrast, and the sinusoidal curve is easier to identify in the three-dimensional image compared with a straight line, the test body has a better image discrimination. Because this test body simple structure, the material is stable, can deposit for a long time, and the multifrequency uses is difficult to damage, consequently has better stability. The sinusoidal copper wire is arranged on the surface of the cylindrical substrate, so that the imaging capability of each dimension of the security inspection equipment can be represented, and the three-dimensional image quality of the equipment can be visually represented.
As shown in fig. 5, the cuboid acrylic box body of the three-dimensional line resolution test body of the security inspection equipment is used for packaging the test body 1, the cuboid acrylic box body is formed by assembling six acrylic plates by pasting or other known fixed connection modes, a pair of supports 4 are respectively fixed on two end faces of the test body 1 in the length direction, and the test body 1 is fixedly supported in the cuboid acrylic box body through the supports. The specific packaging structure is as follows: a pair of brackets 4 are respectively fixed on two end faces of the test body 1 in the length direction, the test body 1 is suspended and supported in the middle of a cuboid acrylic box body assembled by acrylic plates through the brackets 4, two pairs of brackets 4 are respectively and fixedly installed on two opposite plates in the acrylic box body, and the test body 1 is supported in the acrylic box body through the brackets 4; two hole grooves can be respectively opened at the corresponding positions of two relative plates of the cuboid acrylic box body, and one end of the support 4 is inserted into the hole grooves, so that the test body 1 is supported. The difference of the material density and the atomic number of the acrylic packaging board material and the copper wire is large, the contrast in the image of the CT is large, the identification of the copper wire is not influenced, and the packaging structure can play a role in fixing and protecting the test body.
Example 2:
as shown in fig. 3 and 6, the process of testing the security inspection apparatus using the three-dimensional line resolution test body of the security inspection apparatus includes the following steps:
the first step is as follows: placing a three-dimensional line resolution test body of the security inspection equipment at the bottom center position of a conveying device of the security inspection equipment, and enabling the central axis of the cylindrical substrate to be parallel to the running direction of the conveying device;
the second step is that: operating the security inspection equipment and scanning the whole three-dimensional line resolution test body of the security inspection equipment;
the third step: after complete imaging, a tester directly watches the three-dimensional image of the test body on a display equipment screen, and observes and records the copper wire 3 which can be distinguished;
and judging whether the thinnest copper wire 3 which can be seen is complete, if the thinnest copper wire which can be seen is incomplete, observing the thicker copper wire 3, and so on until the complete copper wire 3 is seen, finding the outer diameter of the complete thinnest copper wire 3 which can be seen, wherein the outer diameter is the three-dimensional wire resolution numerical value of the security inspection equipment.
The above description is only for implementing the embodiments of the present invention, and those skilled in the art will understand that any modification or partial replacement without departing from the scope of the present invention shall fall within the scope defined by the claims of the present invention, and therefore, the scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a three-dimensional line resolution of security installations tests body, includes the test body, its characterized in that: the testing body comprises a cylindrical substrate, wherein a plurality of linear grooves are carved on the surface of the cylindrical substrate, the linear grooves are uniformly arranged on the surface of the cylindrical substrate along the length direction of the cylindrical substrate, and copper wires with corresponding outer diameters are arranged in each linear groove.
2. The three-dimensional line resolution test body of the security inspection apparatus according to claim 1, wherein: the cylindrical substrate is made of a plastic material.
3. The three-dimensional line resolution test body of the security inspection apparatus according to claim 2, wherein: the wire diameters of the linear grooves are different.
4. The three-dimensional line resolution test body of the security inspection equipment of claim 3, wherein: the shape of each linear groove is sine wave shape.
5. The three-dimensional line resolution test body of the security inspection apparatus according to claim 4, wherein: the plurality of linear grooves are uniformly arranged on the surface of the cylindrical substrate along the length direction of the cylindrical substrate from small to large according to the linear diameter.
6. The three-dimensional line resolution test body of the security inspection equipment of claim 5, wherein: the outer diameter of the cylindrical substrate is 30mm to 70mm, and the length is 120mm to 200 mm.
7. The three-dimensional line resolution test body of the security inspection apparatus according to claim 6, wherein: the rectangular acrylic box body is assembled by acrylic plates; a pair of supports are fixed on the two end faces of the test body in the length direction respectively, and the test body is supported in the middle of the cuboid acrylic box body in a suspending mode through the supports.
8. The three-dimensional line resolution test body of the security inspection apparatus according to claim 7, wherein: two hole grooves are respectively formed in corresponding positions of two opposite plates of the cuboid acrylic box body, and one end of the support is inserted into the hole grooves, so that the test body is supported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220747309.7U CN216979332U (en) | 2022-04-01 | 2022-04-01 | Three-dimensional line resolution test body of security check equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220747309.7U CN216979332U (en) | 2022-04-01 | 2022-04-01 | Three-dimensional line resolution test body of security check equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216979332U true CN216979332U (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220747309.7U Active CN216979332U (en) | 2022-04-01 | 2022-04-01 | Three-dimensional line resolution test body of security check equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216979332U (en) |
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2022
- 2022-04-01 CN CN202220747309.7U patent/CN216979332U/en active Active
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