CN112816857A - Circuit board test system and manufacturing method thereof - Google Patents
Circuit board test system and manufacturing method thereof Download PDFInfo
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- CN112816857A CN112816857A CN202110409688.9A CN202110409688A CN112816857A CN 112816857 A CN112816857 A CN 112816857A CN 202110409688 A CN202110409688 A CN 202110409688A CN 112816857 A CN112816857 A CN 112816857A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
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Abstract
The invention discloses a circuit board testing system, which relates to the technical field of circuit board production equipment and comprises a plurality of fixed modules, a plurality of sliding modules, a plurality of connecting modules, a refrigerating module and a power supply module, wherein one end of a circuit board is fixedly arranged on a first sliding module through a buckle structure on the first sliding module, the other end of the circuit board is fixedly arranged on a second sliding module through a buckle structure on the second sliding module, the first sliding module is parallel to the second sliding module, one end of the first sliding module is fixedly connected with the first fixed module through a T-shaped connecting piece and a corresponding nut, the refrigerating module is fixedly arranged on a third sliding module through a clamping column and a fifth fixing device which are positioned at the rear end of the third sliding module, one end of the third sliding module is fixedly connected with the third fixed module through an L-shaped connecting piece and a corresponding nut, the compatibility is strong, the cost is reduced, and the testing efficiency is improved. The invention also discloses a manufacturing method of the circuit board testing system.
Description
Technical Field
The invention relates to the technical field of circuit board production equipment, in particular to a circuit board testing system and a manufacturing method thereof.
Background
A Printed Circuit Board (PCB) is a support for electronic components and is a provider for connecting electronic components with circuits. And aiming at the PCB, the PCB assembly is formed by assembling the PCB by a surface assembly technology and then inserting the PCB by a dual in-line package technology. Due to the reasons of processing errors, improper use, aging of components and the like, problems may occur in the manufacturing process and the use process of the PCB assembly, so after the PCB assembly is manufactured, various performance tests need to be performed on the PCB assembly by means of a tool. In the prior art, a PCB assembly to be tested is fixed to a base by screws, and a test environment is established in which the PCB assembly is tested. This solution has the following drawbacks:
(1) different bases are needed for various PCB assemblies with different sizes, so that the cost is higher;
(2) for various PCB assemblies with different sizes, the complex work of completely dismantling the PCB assemblies and the base and rebuilding the test environment is required to be completed in each test process, the time spent is long, and the test efficiency is low.
Therefore, there is a need for a testing device that is compatible with various sizes of PCB assemblies to solve the above-mentioned drawbacks.
Disclosure of Invention
The embodiment of the invention provides a circuit board testing system and a manufacturing method thereof, which are used for solving the defects of poor compatibility, high cost and low efficiency in the prior art.
In order to achieve the above object, in a first aspect, a circuit board testing system provided in an embodiment of the present invention includes a circuit board, a plurality of fixing modules, a plurality of sliding modules, a plurality of connecting modules, a refrigerating module, and a power supply module, where:
the plurality of connecting modules comprise a plurality of four-dimensional connecting pieces, a plurality of L-shaped connecting pieces, a plurality of T-shaped connecting pieces and a plurality of nuts.
The plurality of fixing modules are connected together through the plurality of four-dimensional connecting pieces to form a three-dimensional tool.
One end of the circuit board is fixedly arranged on the first sliding module through a buckle structure on the first sliding module.
The other end of the circuit board is fixedly arranged on the second sliding module through a buckle structure on the second sliding module.
The first sliding module is parallel to the second sliding module.
One end of the first sliding module is fixedly connected with the first fixing module through a T-shaped connecting piece and a corresponding nut.
The other end of the first sliding module is fixedly connected with the second fixing module through a T-shaped connecting piece and a corresponding nut.
One end of the second sliding module is fixedly connected with the first fixing module through a T-shaped connecting piece and a corresponding nut.
The other end of the second sliding module is fixedly connected with the second fixing module through a T-shaped connecting piece and a corresponding nut.
The refrigeration module is fixedly arranged on the third sliding module through a clamping column positioned at the rear end of the refrigeration module and a fifth fixing device.
One end of the third sliding module is fixedly connected with the third fixing module through an L-shaped connecting piece and a corresponding nut.
The other end of the third sliding module is fixedly connected with the fourth fixing module through an L-shaped connecting piece and a corresponding nut.
And one end of the power supply module is fixedly connected with the fifth fixing module through a T-shaped connecting piece and a corresponding nut.
The other end of the power supply module is fixedly connected with the sixth fixing module through a T-shaped connecting piece and a corresponding nut.
As a preferred embodiment of the invention, the refrigeration module comprises a fan cover and a fan.
As a preferred embodiment of the present invention, the bottom surface of the fan cover is provided with a plurality of positioning holes having different sizes.
As a preferred embodiment of the present invention, two sides of the bottom surface of the fan cover are respectively and fixedly provided with a clamping column.
As a preferred embodiment of the invention, each L-shaped connecting piece is an L-shaped dovetail slide block.
As a preferred embodiment of the invention, each T-shaped connecting piece is a T-shaped dovetail slide block.
As a preferred embodiment of the present invention, each of the nuts is a handle nut.
As a preferred embodiment of the present invention, the power supply module is an AC TO DC power supply module capable of outputting a plurality of voltages.
As a preferred embodiment of the present invention, the tool is a rectangular parallelepiped or a cube.
As a preferred embodiment of the present invention, each of the fixing modules is a profile.
As a preferred embodiment of the present invention, each of the sliding modules is a sliding bar.
In a second aspect, an embodiment of the present invention provides a method for manufacturing a circuit board testing system according to the first aspect, where the method includes the following steps:
s101, selecting a plurality of sectional materials according to requirements and selecting four sectional materials from the plurality of sectional materials;
s102, connecting the four sections into a rectangle by using a four-dimensional connecting piece to form a first-layer structural body;
s103, respectively installing four sectional materials at four intersection points of the first layer of structure body through four-dimensional connecting pieces;
s104, fixedly arranging a first section bar and a second section bar which are parallel to each other among the four section bars by utilizing an L-shaped connecting piece and a corresponding nut;
s105, fixedly installing the PCB to be tested between a first slide bar and a second slide bar which are preset with elastic buckle structures;
s106, fixedly arranging the first sliding rod between the first profile and the second profile by utilizing a T-shaped connecting piece and a corresponding nut;
s107, fixedly arranging the second slide bar between the first section bar and the second section bar by utilizing a T-shaped connecting piece and a corresponding nut;
s108, fixedly arranging a third sliding rod between a third section bar and a fourth section bar by utilizing an L-shaped connecting piece and a corresponding nut to form a second-layer structure body;
s109, fixedly mounting a section bar between four section bars mounted at four intersection points of the first layer of structure body by using a four-dimensional connecting piece to form a third layer of structure body;
s1010, fixedly mounting a refrigerating device on the third sliding rod by using a nut;
and S1011, fixedly installing the power supply device between two parallel sectional materials by utilizing the nut and the T-shaped connecting piece to form a circuit board testing system.
The circuit board test system and the manufacturing method thereof provided by the embodiment of the invention have the following beneficial effects:
(1) by arranging the sliding device in the profile and arranging the elastic buckle structure on the sliding rod, the PCB assembly with different sizes and thicknesses can be compatible, the cost is reduced, the complex dismantling and building work is saved, and the testing efficiency is improved;
(2) through the clamping columns arranged on the bottom surface of the fan cover and the positioning holes with different sizes, the fans with different sizes are fixed on the fan cover, so that the position and the wind direction of the refrigeration system can be flexibly adjusted, the fans can be conveniently replaced, and the use is convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic perspective view of a circuit board testing system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a connection between a PCB assembly and a sliding bar according to an embodiment of the present invention;
fig. 3 is a perspective view of the bottom of the fan cover according to the embodiment of the present invention;
FIG. 4 is an exploded view of a circuit board testing system according to an embodiment of the present invention;
FIG. 5 is a schematic view of the connection between the section bar and the sliding rod provided by the embodiment of the invention;
fig. 6 is a schematic view of the connection between the T/L-shaped connecting member and the sliding rod according to the embodiment of the present invention.
Description of the labeling:
1-14-section bar, 15-refrigerating plant, 16-power supply unit, 17-PCB board subassembly, 18-first slide bar, 19-second slide bar, 20-first elasticity buckle structure, 21-24- "T" type connecting piece, 25-third slide bar, 26-second elasticity buckle structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The following describes a circuit board testing system provided by an embodiment of the present invention:
as a specific embodiment of the present invention, as shown in fig. 1, a circuit board testing system provided by the embodiment of the present invention includes a profile 1, a profile 2, a profile 3, a profile 4, a profile 5, a profile 6, a profile 7, a profile 8, a profile 9, a profile 10, a profile 11, a profile 12, a profile 13, a profile 14, three sliding rods (not shown in the figure), a connection fitting (not shown in the figure), a refrigerating device 15, a power supply device 16, and a PCB board assembly 17, wherein:
the connecting fittings comprise a plurality of four-dimensional connecting pieces, a plurality of L-shaped connecting pieces, a plurality of T-shaped connecting pieces and a plurality of nuts.
One end of the section bar 1, the section bar 3 and the section bar 5 are connected together through a four-dimensional connecting piece, the other end of the section bar 1 is connected with one end of the section bar 9 and one end of the section bar 14 through a four-dimensional connecting piece, the other end of the section bar 3 is connected with one end of the section bar 4 and one end of the section bar 6 through a four-dimensional connecting piece, the other end of the section bar 5 is connected with one end of the section bar 7 and one end of the section bar 13 through a four-dimensional connecting piece, the section bar 8, the section bar 11 and one end of the section bar 12 are connected together through a four-dimensional connecting piece, the other end of the section bar 8 is connected with one end of the section bar 6 and one end of the section bar 7 through a four-dimensional connecting piece, the other end of the section bar 11 is connected with one end.
One end of the section bar 2 is fixedly connected with the section bar 9 through an L-shaped connecting piece and a corresponding nut, the other end of the section bar 2 is fixedly connected with the section bar 3 through the L-shaped connecting piece and a corresponding nut, one end of the section bar 10 is fixedly connected with the section bar 12 through the L-shaped connecting piece and a corresponding nut, the other end of the section bar 10 is fixedly connected with the section bar 7 through the L-shaped connecting piece and a corresponding nut, the section bar 2 is parallel to the section bar 1 and the section bar 4, and the section bar 10 is parallel to the section bar 8 and the section bar 13.
As a specific embodiment of the present invention, as shown in fig. 2, the PCB board assembly 17 is disposed between the first sliding bar 18 and the second sliding bar 19, wherein the first sliding bar 18 and the second sliding bar 19 are parallel. One end of the PCB assembly 17 is fixedly disposed on the first sliding rod 18 through a first elastic buckle structure 20, and the other end of the PCB assembly 17 is fixedly disposed on the second sliding rod 19 through a second elastic buckle structure 26.
One end of the first sliding bar 18 is fixedly arranged on the section bar 2 through a T-shaped connecting piece 21 and a corresponding nut.
The other end of the first slide bar 18 is fixed to the profile 10 by a T-shaped connector 22 and a corresponding nut.
One end of the second slide bar 19 is fixedly arranged on the section bar 2 by means of a "T" shaped connecting piece 24 and a corresponding nut.
The other end of the second slide bar 19 is fixed on the profile 10 by means of a "T" shaped connection 23 and a corresponding nut.
As a specific embodiment of the present invention, as shown in fig. 3, the refrigeration device 15 includes a fan cover and a fan, wherein the bottom surface of the fan cover is provided with a plurality of positioning holes with different sizes, and two sides of the bottom surface of the fan cover are respectively and fixedly provided with a clamping column. Through setting up the card post, can make the fan give PCB board subassembly heat dissipation at the angle of difference, improved the radiating efficiency.
Through the locating hole that sets up not unidimensional in the bottom surface different positions of fan casing, can fix not unidimensional fan on the fan casing for refrigerating plant 15 has the characteristics of convenient change, is applicable to the PCB board subassembly of various consumptions. As can be seen from fig. 2, the first elastic snap structure 20 and the second elastic snap structure 26 are composed of a plurality of elastic snaps located at different positions, so as to fix PBC board assemblies with different thicknesses, which is highly compatible and saves cost.
As an embodiment of the present invention, as shown in fig. 3, the fan cover is fixedly disposed on the third sliding rod 25 through a clamping column at the rear end thereof and a corresponding nut.
One end of the third sliding rod 25 is fixedly connected with the section bar 9 through an L-shaped connecting piece and a corresponding nut.
The other end of the third sliding rod 25 is fixedly connected with the section bar 12 through an L-shaped connecting piece and a corresponding nut.
The L-shaped connecting pieces arranged at the two ends of the third sliding rod 25 can slide up and down, the spatial position of the fan on the tool can be adjusted, and the use is convenient.
As a specific embodiment of the present invention, each "L" type connecting piece is an "L" type dovetail slider, and each "T" type connecting piece 21, each "T" type connecting piece 22, each "T" type connecting piece 23, and each "T" type connecting piece 24 is a "T" type dovetail slider, so as to be adapted to a guide rail of a profile.
As a specific embodiment of the invention, each nut is a handle nut, which is convenient for manual use.
Fig. 3 only shows 3 kinds of positioning holes with different sizes, and actually, the positioning holes can be added according to application situations.
As shown in FIG. 6, the L-shaped connecting piece and the T-shaped connecting piece usually do mechanical movement, and the movement precision is high and stable. Each L-shaped connecting piece and each T-shaped connecting piece are matched with the trapezoidal guide rail in the section bar for use, and the L-shaped connecting pieces and the T-shaped connecting pieces play a role in guiding and supporting.
As an alternative embodiment of the present invention, as shown in fig. 1, the structural body formed by the profile 1, the profile 2, the profile 3, the profile 4, the profile 5, the profile 6, the profile 7, the profile 8, the profile 9, the profile 10, the profile 11, the profile 12, the profile 13, and the profile 14 is a cuboid, or a cube, so that the tool can be placed on any surface as a bottom, and the placement mode of the tool can be changed according to the test requirements, thereby improving the test efficiency.
The T-shaped connecting piece 21, the T-shaped connecting piece 22, the T-shaped connecting piece 23 and the T-shaped connecting piece 24 can slide in corresponding profiles to drive the first slide bar 18 and the second slide bar 19 to move left and right, so that PBC plate assemblies with different areas can be fixed.
The T-shaped connecting pieces in the section bars 8 and 10 slide in the section bars 8 and 10, so that the power supply device 16 can be driven to move left and right, and the power supply device can be conveniently supplied to the testing device at different positions.
As an alternative embodiment of the present invention, the power supply device 16 is an AC TO DC power module capable of outputting multiple voltages, so that the power supply device 16 can supply power TO PCB board assemblies with different power consumptions. In order to save space, the power supply device 16 may be placed inside the tool holder, not limited to the placement position shown in fig. 1.
Particularly, the thin plates (acrylic or metal plates) can be arranged on six faces of the tool as required, the radiating holes are formed, the radiating effect of the chassis structure is simulated, the chassis environment can be simulated, the PBC board assembly can be comprehensively tested without the chassis, and the cost is saved. The tool is formed by combining a plurality of standard sectional materials and is convenient to build.
The circuit board testing system provided by the embodiment of the invention comprises a circuit board, a plurality of fixed modules, a plurality of sliding modules, a plurality of connecting modules, a refrigerating module and a power supply module, wherein the plurality of connecting modules comprise a plurality of four-dimensional connecting pieces, a plurality of L-shaped connecting pieces, a plurality of T-shaped connecting pieces and a plurality of nuts, the plurality of fixed modules are connected together through the plurality of four-dimensional connecting pieces to form a three-dimensional tool, one end of the circuit board is fixedly arranged on the first sliding module through a buckle structure on the first sliding module, the other end of the circuit board is fixedly arranged on the second sliding module through a buckle structure on the second sliding module, the first sliding module is parallel to the second sliding module, one end of the first sliding module is fixedly connected with the first fixed module through the T-shaped connecting pieces and the corresponding nuts, the other end of the first sliding module is fixedly connected with the second fixed module through the T-shaped connecting pieces and the corresponding nuts, one end of the second sliding module is fixedly connected with the first fixed module through a T-shaped connecting piece and a corresponding nut, the other end of the second sliding module is fixedly connected with the second fixed module through the T-shaped connecting piece and the corresponding nut, the refrigeration module is fixedly arranged on the third sliding module through a clamping column and a fifth fixing device which are positioned at the rear end of the second sliding module, one end of the third sliding module is fixedly connected with the third fixed module through an L-shaped connecting piece and a corresponding nut, the other end of the third sliding module is fixedly connected with the fourth fixed module through an L-shaped connecting piece and a corresponding nut, one end of the power supply module is fixedly connected with the fifth fixed module through the T-shaped connecting piece and a corresponding nut, the other end of the power supply module is fixedly connected with the sixth fixed module through the T-shaped connecting piece and a corresponding nut, the compatibility is strong, and the cost is reduced, the testing efficiency is improved.
In addition, the embodiment of the invention also provides a manufacturing method of the circuit board testing system, which comprises the following steps:
selecting 14 sectional materials, wherein the 14 sectional materials are sectional materials 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 and 14;
connecting the section 4, the section 6, the section 8 and the section 11 into a rectangle by using a four-dimensional connecting piece to form a first layer of structural body;
respectively installing section bars, namely section bars 3, 7, 9 and 12 at four intersection points of the first layer structure through four-dimensional connecting pieces;
fixing the section bar 2 between the section bar 3 and the section bar 9 by using an L-shaped connecting piece and a corresponding nut, and fixing the section bar 10 between the section bar 7 and the section bar 12;
fixedly mounting a PCB (printed Circuit Board) assembly to be tested between a slide bar 18 and a slide bar 19 which are preset with elastic buckle structures;
the first slide bar 18 is fixedly arranged between the section bar 2 and the section bar 10 by utilizing a T-shaped connecting piece and a corresponding nut;
the second slide bar 19 is fixedly arranged between the section bar 2 and the section bar 10 by utilizing a T-shaped connecting piece and a corresponding nut;
the third slide bar 25 is fixedly arranged between the section bars 9 and 12 by using an L-shaped connecting piece and a corresponding nut to form a second layer of structure body;
fixedly installing a profile 13 between the profile 7 and the profile 12, fixedly installing a profile 5 between the profile 7 and the profile 3, fixedly installing a profile 1 between the profile 3 and the profile 9, and fixedly installing a profile 14 between the profile 9 and the profile 12 by using a four-dimensional connecting piece to form a third-layer structural body;
the refrigeration device 15 is fixedly mounted on the third slide bar 25 by means of a nut;
the power supply device 16 is fixedly arranged between the section bars 8 and 10 by using nuts and T-shaped connecting pieces to form a circuit board testing system.
In particular, a plurality of mutually parallel PCB board assemblies may be arranged within the second layer structure to enable testing of a plurality of PCB board assemblies simultaneously.
It will be appreciated that the relevant features of the method and apparatus described above are referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
It should be noted that the above-mentioned embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the protection scope of the present invention.
Claims (12)
1. The utility model provides a circuit board test system, includes the circuit board, its characterized in that still includes a plurality of fixed modules, a plurality of slip module, a plurality of connection module, refrigeration module and power module, wherein:
the plurality of connecting modules comprise a plurality of four-dimensional connecting pieces, a plurality of L-shaped connecting pieces, a plurality of T-shaped connecting pieces and a plurality of nuts;
the plurality of fixing modules are connected together through the plurality of four-dimensional connecting pieces to form a three-dimensional tool;
one end of the circuit board is fixedly arranged on the first sliding module through a buckle structure on the first sliding module;
the other end of the circuit board is fixedly arranged on the second sliding module through a buckle structure on the second sliding module;
the first sliding module is parallel to the second sliding module;
one end of the first sliding module is fixedly connected with the first fixing module through a T-shaped connecting piece and a corresponding nut;
the other end of the first sliding module is fixedly connected with the second fixing module through a T-shaped connecting piece and a corresponding nut;
one end of the second sliding module is fixedly connected with the first fixing module through a T-shaped connecting piece and a corresponding nut;
the other end of the second sliding module is fixedly connected with the second fixing module through a T-shaped connecting piece and a corresponding nut;
the refrigeration module is fixedly arranged on the third sliding module through a clamping column positioned at the rear end of the refrigeration module and a fifth fixing device;
one end of the third sliding module is fixedly connected with the third fixing module through an L-shaped connecting piece and a corresponding nut;
the other end of the third sliding module is fixedly connected with the fourth fixing module through an L-shaped connecting piece and a corresponding nut;
one end of the power supply module is fixedly connected with the fifth fixing module through a T-shaped connecting piece and a corresponding nut;
the other end of the power supply module is fixedly connected with the sixth fixing module through a T-shaped connecting piece and a corresponding nut.
2. The circuit board testing system of claim 1, wherein the cooling module comprises a fan housing, a fan.
3. The circuit board testing system of claim 2, wherein the bottom surface of the fan housing is provided with a plurality of positioning holes having different sizes.
4. The circuit board testing system of claim 2, wherein two sides of the bottom surface of the fan housing are respectively and fixedly provided with a clamping column.
5. The circuit board testing system of claim 1, wherein each of said "L" shaped connectors is an "L" shaped dovetail slider.
6. The circuit board testing system of claim 1, wherein each said "T" shaped connector is a "T" shaped dovetail slider.
7. The circuit board testing system of claim 1, wherein each of said nuts is a handle nut.
8. The circuit board testing system of claim 1, wherein the power module is an AC TO DC power module capable of outputting multiple voltages.
9. The circuit board testing system of claim 1, wherein the tooling is rectangular or square.
10. The circuit board testing system of claim 1, wherein each of the securing modules is a profile.
11. The circuit board testing system of claim 1, wherein each of the sliding modules is a sliding bar.
12. A method of manufacturing a circuit board testing system according to any of claims 1-11, comprising:
selecting a plurality of sectional materials according to requirements and selecting four sectional materials from the plurality of sectional materials;
connecting the four fixed modules into a rectangle by using a four-dimensional connecting piece to form a first layer of structural body;
respectively installing four fixing modules at four intersection points of the first layer of structure body through four-dimensional connecting pieces;
a first fixing module and a second fixing module which are parallel to each other are fixedly arranged among the four fixing modules by utilizing the L-shaped connecting piece and the corresponding nut;
fixedly installing a circuit board to be tested between a first sliding module and a second sliding module which are preset with elastic buckle structures;
the first sliding module is fixedly arranged between the first fixing module and the second fixing module by utilizing a T-shaped connecting piece and a corresponding nut;
the second sliding module is fixedly arranged between the first fixing module and the second fixing module by utilizing a T-shaped connecting piece and a corresponding nut;
the third sliding module is fixedly arranged between the third fixing module and the fourth fixing module by utilizing the L-shaped connecting piece and the corresponding nut to form a second-layer structure body;
respectively and fixedly mounting a fixing module between four fixing modules mounted at four intersection points of the first layer of structural body by using a four-dimensional connecting piece to form a third layer of structural body;
fixedly mounting a refrigeration module on the third sliding module by using a nut;
the power supply module is fixedly arranged between two parallel fixing modules by utilizing the nut and the T-shaped connecting piece to form a circuit board testing system.
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