A centrifugal constant acceleration test system

Abstract

The application discloses a centrifugal constant acceleration test system and belongs to the technical field of centrifugal constant acceleration test devices. The application solves the problems of high cost, low efficiency and complex operation of the existing centrifugal constant acceleration test system. The centrifugal constant acceleration test system comprises a support cantilever, a counterweight cantilever and a rotating part. The support cantilever and the counterweight cantilever are arranged at the two ends of the rotating part, and the rotating part is used for driving the support cantilever and the counterweight cantilever to rotate. The counterweight cantilever is used for matching the support cantilever with equal mass counterweights. A test piece test direction conversion unit is arranged on the support cantilever, and the test piece test direction conversion unit is used for changing the test direction of the test piece without changing the mass of the support cantilever. The application can change the test direction of the test piece without changing the mass of the support cantilever, thereby reducing the test cost and improving the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of centrifugal constant acceleration testing devices, and more particularly to a centrifugal constant acceleration testing system. Background Technology

[0002] Centrifugal constant acceleration systems are currently an important evaluation tool used by various research institutes to determine whether electronic products, components, equipment, and structures can achieve the expected results when subjected to constant acceleration (steady-state acceleration) environments. They can also be used as a method to reproduce product environments, induce product failures, and improve product environmental adaptability.

[0003] In centrifugal constant acceleration testing systems, the test orientation of the specimen is determined first. The specimen is tested along three orthogonal axes, with two positive and two negative directions for each axis, for a total of six directions. When installing the specimen, the specimen and fixture are first weighed. Then, the fixture is installed on one of the cantilever horizontal platforms of the centrifugal constant acceleration testing system, and the specimen is then installed on the fixture. A counterweight of the same mass is then installed on the other cantilever horizontal platform of the same centrifugal constant acceleration testing system. When changing orientation, the specimen and fixture need to be disassembled sequentially, the test orientation readjusted, and then reassembled sequentially. Vertical testing requires the prior design of vertical fixtures or plates, which introduces issues related to design cycle, processing cycle, and processing costs. The addition of vertical plates or fixtures inevitably causes changes in the mass of the test specimen. Therefore, the counterweight on the other cantilever of the centrifugal constant acceleration testing system needs to be adjusted to ensure dynamic balance during the centrifuge rotation process.

[0004] In summary, the main reason why existing centrifugal constant acceleration test systems are cumbersome to operate, inefficient, and costly during testing is due to the special nature of their test requirements. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a centrifugal constant acceleration test system to solve the problems of high cost, low efficiency and complicated operation of existing centrifugal constant acceleration test systems.

[0006] The objective of this invention is mainly achieved through the following technical solutions:

[0007] This invention provides a centrifugal constant acceleration test system, including a support cantilever, a counterweight cantilever, and a rotating component; the support cantilever and the counterweight cantilever are located at both ends of the rotating component, and the rotating component is used to drive the support cantilever and the counterweight cantilever to rotate; the counterweight cantilever is used to apply a counterweight of equal mass to the support cantilever.

[0008] The support cantilever is equipped with a test specimen test direction conversion unit, which is used to change the test direction of the test specimen without changing the mass of the support cantilever.

[0009] In one possible design, the test specimen test direction conversion unit includes a fixed base, a movable platform, a clamp, and a locking assembly;

[0010] The fixed base is fixed to the cantilever; the test piece is fixed to the movable table by a clamp. The movable table is located on the fixed base and is locked by a locking component. The test direction of the test piece can be changed by adjusting the installation direction of the movable table.

[0011] In one possible design, the test piece is provided with multiple connecting lugs, and the fixture is provided with multiple mounting holes, the number of which is equal to the number of connecting lugs; the test piece is fixedly connected to the mounting holes on the fixture through its connecting lugs.

[0012] In one possible design, the fixture is a rectangular plate with four mounting holes arranged in a rectangular pattern.

[0013] In one possible design, the locking components include a first safety pin and a second safety pin with identical structures.

[0014] In one possible design, both the first and second safety pins include a pin body; the pin body is cuboid in shape, and has a vertical safety pin locking end and a horizontal safety pin locking end that are opposite each other along the length of the pin body.

[0015] In one possible design, the end face of the locking end of the vertical safety pin is provided with a groove, and two parallel vertical pins are provided in the groove. When the movable panel is installed on the fixed base in a horizontal manner, the vertical pins are used to lock the movable panel.

[0016] In one possible design, grooves are provided on both end faces along the length of the safety pin body. The grooves are along the width and height of the safety pin body, and the two ends of the safety pin body form safety pin wings by setting the grooves.

[0017] In one possible design, the safety pin wing has a fixing hole; the base has a safety pin fixing hole, and the fixing hole on the safety pin wing and the safety pin fixing hole on the base can be aligned and connected by bolts.

[0018] In one possible design, the locking end of the horizontal safety pin is provided with a cubic block-shaped horizontal pin;

[0019] When the movable table is fixed to the fixed base in a horizontal manner, the movable table is locked with a horizontal pin.

[0020] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0021] (1) The first and second safety pins of the present invention both include a pin body, which is rectangular in shape. Along the length of the pin body, the pin body is provided with a vertical safety pin locking end and a horizontal safety pin locking end, which are located on opposite surfaces. A groove is provided on the end face of the vertical safety pin locking end, the width of which is equal to the width of the insert plate on the movable table. In addition, two parallel vertical pins are provided in the groove, and movable panel safety insertion holes are provided at both ends along the length of the insert plate. When the movable table is inserted vertically into the first T-slot on the boss, the first and second safety pins are inserted on the outer sides of the two insert plates of the movable table. At this time, the two vertical pins of the first and second safety pins can be inserted into the movable panel safety insertion holes on the corresponding insert plates to achieve the vertical safety pin locking state, thereby fixing the movable table.

[0022] (2) The present invention utilizes the movable platform to change different directions and angles on the fixed base, thereby enabling the centrifugal constant acceleration system to quickly change direction when changing the test direction. Operationally, this avoids the frequent disassembly and installation of test pieces and fixtures, and reduces the test risks caused by the increased number of test piece installations.

[0023] (3) When the test piece is subjected to vertical testing, the present invention does not require the design of a vertical plate or vertical fixture, thus eliminating the work of installing a vertical plate or vertical fixture, saving time, simplifying the steps, and reducing the design of vertical plates and vertical fixtures, as well as the production cycle and processing costs.

[0024] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0025] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0026] Figure 1 This is a schematic diagram of the overall structure of the test direction conversion unit of the test specimen of the centrifugal constant acceleration test system of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the fixing base of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the movable platform of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the fixing component of the present invention;

[0030] Figure 5 This is a schematic diagram showing the movable platform fixed to the fixed base in a horizontal installation manner;

[0031] Figure 6 for Figure 5 A schematic diagram of the structure in which the movable platform is fixed to the fixed base after being rotated 90° counterclockwise or clockwise;

[0032] Figure 7 This is a schematic diagram showing the movable tabletop fixed to the base in a vertical installation manner;

[0033] Figure 8 for Figure 7 A schematic diagram of the structure in which the movable platform is fixed to the fixed base after being rotated 90° counterclockwise;

[0034] Figure 9 This is a schematic diagram of the structure of the test piece of the present invention.

[0035] Figure label:

[0036] 1-Rotating arm; 2-Fixed base; 3-Boss; 4-Safety pin insertion hole; 5-Fixed base and cantilever connection hole; 6-Cross combination first T-slot; 7-Constraint baffle; 8-Movable platform; 9-First T-pin; 10-Movable panel mounting hole; 11-Movable panel safety insertion hole; 12-Fixed component; 13-Vertical safety pin locking end; 14-Safety pin wing; 15-Horizontal safety pin locking end; 16-Square opening; 17-Safety pin fixing hole; 18-Second T-pin; 19-Vertical pin; 20-Test piece. Detailed Implementation

[0037] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0038] This invention provides a centrifugal constant acceleration testing system, including a support cantilever, a counterweight cantilever, and a rotating component; the support cantilever and the counterweight cantilever are located at both ends of the rotating component, and the rotating component is used to drive the support cantilever and the counterweight cantilever to rotate; the counterweight cantilever is used to provide a counterweight of equal mass to the support cantilever; the support cantilever is provided with a test pressure component test direction conversion unit, which is used to change the test direction of the test pressure component 20 without changing the mass of the support cantilever.

[0039] The test direction conversion unit of the present invention includes a fixed base 2 and a movable platform 8; the fixed base 2 is fixed on the cantilever 1, and the test specimen 20 is fixed on the movable platform 8 by a clamp; the movable platform 8 is fixed on the fixed base 2 and can be converted to different directions on the fixed base 2.

[0040] Specifically, such as Figure 1 As shown, the centrifugal constant acceleration test system of the present invention adopts the existing centrifugal constant acceleration test system. The centrifugal constant acceleration test system is provided with a cantilever 1, a fixed base 2 fixed on the cantilever 1, the test pressure piece 20 is first fixedly connected to the clamp, and then the clamp is fixed on the movable table 8, and the movable table 8 is installed on the fixed base 2.

[0041] It should be noted that, as Figures 5 to 8 As shown, the movable platform 8 can be installed horizontally or vertically on the fixed base 2. When the movable platform 8 is installed horizontally, its installation direction can be adjusted by rotating it clockwise or counterclockwise by 90°, 180°, and 270°. When the movable platform 8 is installed vertically, its installation direction can also be adjusted by rotating it clockwise or counterclockwise by 90°, 180°, and 270°.

[0042] Existing centrifugal constant acceleration testing systems can only perform constant acceleration tests in one direction with a single installation. Changing the direction requires reassembling and disassembling the test specimen 20 and the fixture. Vertical tests also require the installation of a dedicated vertical plate or fixture, the design and production of which increase the test preparation cycle and cost. Furthermore, changing the vertical plate or fixture necessitates readjusting the corresponding counterweights to ensure the accuracy and safety of the test.

[0043] Compared with existing technologies, this invention utilizes the movable platform 8 to switch different directions and angles on the fixed base 2, thereby enabling the centrifugal constant acceleration system to quickly change direction during test direction changes. Operationally, this avoids frequent disassembly and installation of the test specimen 20 and fixtures, reducing the test risks caused by increased installation frequency of the test specimen 20. When the test specimen 20 is tested vertically, this invention eliminates the need for designing vertical plates or fixtures, saving time, simplifying procedures, and reducing the design, production cycle, and processing costs associated with vertical plates and fixtures. Furthermore, the overall test mass remains constant throughout all test directions (the overall mass of the fixed base 2 and the movable platform 8 does not change), eliminating the need to readjust the counterweight due to adding vertical plates or replacing vertical fixtures. The movable platform 8 on the fixed base 2 allows for adjustments to twelve test directions, providing optimal conditions for the centrifugal constant acceleration test of the test specimen 20. In summary, this invention saves time, money, and manpower costs, and improves work efficiency.

[0044] In order to securely fix the test piece 20 to the movable table 8, the clamp of the present invention is a cuboid plate with mounting holes for fixing the test piece 20. The test piece 20 is fixed to the clamp through the mounting holes.

[0045] It should also be noted that, such as Figure 9 As shown, the main body of the table is provided with multiple movable panel mounting holes 10, and the fixture is also provided with connecting ears that correspond to the positions of the movable panel mounting holes 10 and are equal in number. The fixture is used to fix the opposite side of the test pressure piece 20 to be aligned with and fitted to the main body of the table. After the connecting ears of the fixture are aligned with the mounting holes of the movable panel, they are connected by bolts, thereby fixing the fixture to the movable table 8.

[0046] In order to better fix the fixed base 2 to the cantilever 1, multiple fixed base and cantilever connection holes 5 are reserved on the fixed base 2, such as eight fixed base and cantilever connection holes 5. The eight fixed base and cantilever connection holes 5 are arranged in two parallel groups on both sides of the fixed base 2. The fixed base 2 is fixed to the cantilever 1 of the centrifugal constant acceleration test system through the eight fixed base and cantilever connection holes 5.

[0047] To increase the stability of the movable platform 8, the fixed base 2 of the present invention is cuboid in shape; the cuboid fixed base 2 is provided with a cuboid boss 3, and the boss 3 is provided with an inverted cross-shaped first T-shaped groove 6; a square opening 16 is provided in the center of the boss 3; the square opening 16 penetrates the boss 3 along the depth direction of the boss 3.

[0048] like Figure 2 As shown, the fixed base 2 is cuboid in shape and is fixed to the cantilever 1. The three sides of the fixed base 2 are parallel to the corresponding sides of the cantilever 1. The boss 3 is located at the geometric center of the fixed base 2 in plan view. The length and width of the boss 3 are equal, and both the length and width of the boss 3 are greater than the height of the boss 3. The boss 3 is provided with two inverted first T-shaped grooves. The length direction of the bottom of the two inverted first T-shaped grooves is parallel to the four sides of the corresponding boss 3. In addition, the two inverted first T-shaped grooves intersect and are perpendicular to each other, forming an inverted cross-shaped combination of first T-shaped grooves 6.

[0049] Compared with the prior art, the present invention sets two mutually perpendicular inverted first T-slots, which provide a basis for the orientation change of the movable platform 8. The movable platform 8 can be embedded in any one of the inverted first T-slots, thereby realizing the orientation change of the movable platform 8. Since the position of the test piece 20 on the movable platform 8 is fixed, when the orientation of the movable platform 8 is changed, it will take the test piece 20 to synchronously change to different orientations, so that the test piece 20 can meet the centrifugal constant acceleration test in different directions.

[0050] In existing technologies, when the installation direction of the test specimen 20 needs to be changed to adjust the test direction, the test specimen 20 and the fixture need to be disassembled sequentially, the test direction readjusted, and then the test specimen 20 and the fixture reinstalled sequentially. Furthermore, when conducting vertical tests, vertical fixtures or plates need to be designed first, resulting in issues related to design cycle, processing cycle, and processing cost. Conducting vertical tests requires first removing the test specimen 20 and fixtures, then weighing the vertical plate or independent vertical fixture, and then installing it on the cantilever 1 platform of the centrifugal constant acceleration test system. Subsequently, the horizontal fixture and test specimen 20 are sequentially installed on the vertical plate, or the test specimen 20 is directly installed on the independent vertical fixture. Because the addition of the vertical plate or vertical fixture inevitably causes changes in the test mass, the counterweight of the other end of the cantilever 1 of the centrifugal constant acceleration test system also needs to be adjusted to ensure dynamic balance during the centrifuge rotation process.

[0051] Compared with the prior art, the present invention does not require the design of existing upright plates and vertical clamps when adjusting the test direction of the test specimen 20. The present invention first fixes the test specimen 20 on the movable table 8, and adjusts the test direction of the test specimen 20 by changing the direction of the movable table 8.

[0052] The specific process for adjusting the test direction of the test specimen 20 is as follows: Figures 5 to 8 As shown, when the test specimen 20 is subjected to a horizontal test, the movable platform 8 is inserted horizontally into any one of the T-slots on the fixed base 2. With the front body in horizontal mounting, the movable platform 8 can be rotated 90°, 180°, and 270° clockwise or counterclockwise to adjust the installation direction of the test specimen 20, achieving four possible combinations in two directions. When the movable platform 8 is inserted vertically into the T-slot on the fixed base 2, with the front body in vertical mounting, two different surfaces of the movable platform 8 can be rotated 90°, 180°, and 270° clockwise or counterclockwise respectively to adjust the installation direction of the test specimen 20, achieving eight possible combinations in four directions.

[0053] It should be emphasized that the entire test process using the test direction conversion unit of the present invention is convenient and quick to operate because it does not require the processing of special vertical plates and vertical fixtures. It also ensures that the test mass remains constant in all test directions without the need for counterweight adjustment. The present invention effectively solves the problems of existing centrifugal constant acceleration test systems, such as complicated operation and long test preparation time when changing test directions, which leads to increased economic costs and safety risks for personnel.

[0054] This invention provides two mutually perpendicular inverted first T-slots, which form the basis for changing the direction of the movable platform 8. The movable platform 8 can be embedded in any one of the inverted first T-slots to achieve the change of direction of the movable platform 8. Since the position of the test piece 20 on the movable platform 8 is fixed, when the direction of the movable platform 8 is changed, the test piece 20 will be changed in the same direction, so that the test piece 20 can meet the centrifugal constant acceleration test in different directions.

[0055] It should be noted that, as Figure 1 As shown, when conducting a centrifugal constant acceleration test using a centrifugal constant acceleration system, the test direction of the test specimen 20 needs to be determined first. The test specimen 20 is divided into three orthogonal axes (XC, YC, and ZC), each axis including two positive and two negative directions, for a total of six test directions. In this invention, the origin is taken as the intersection of two adjacent sides of the base surface of the fixed base, the directions of the two adjacent sides are defined as the XC and YC directions respectively, and the height direction of the boss is taken as the ZC direction to establish a coordinate system.

[0056] It is important to note that the depth of the square opening 16 on the boss 3 is equal to the height of the first T-slot; the length and width of the square opening 16 are both equal to the width of the bottom of the first T-slot. Furthermore, the inverted first T-slot includes a bottom horizontal slot and a top vertical slot, wherein the width of the bottom horizontal slot is equal to the height of the first T-slot (including the height of the bottom horizontal slot plus the height of the top vertical slot); and the ratio of the width of the bottom horizontal slot to the width of the top vertical slot is 3:1 to 5:1. This ensures that the movable platform 8 and the fixed base 2 maintain optimal contact when changing direction.

[0057] In order to ensure that the movable tabletop 8 can be flexibly adjusted in installation direction on the fixed base 2, the movable tabletop 8 of the present invention includes a cuboid tabletop body, and insert plates are provided at both ends along the long side of the tabletop body. The two insert plates and the tabletop body are combined to form two first T-shaped pins 9; the two first T-shaped pins 9 can be inserted into the T-shaped groove.

[0058] Specifically, such as Figure 3 As shown, the length and width of the main body of the tabletop are equal and both are greater than the thickness of the main body of the tabletop. Along the length direction of the main body of the tabletop, there are insert plates on the end faces of both ends of the main body of the tabletop. The two insert plates and the main body of the tabletop are combined to form two first T-shaped pins 9. The insert plates of the two first T-shaped pins 9 are arranged in parallel.

[0059] When the test specimen 20 needs to be tested vertically, insert either of the two first T-pins 9 into either of the T-slots from one side of the boss 3 of the fixed base 2. When the vertical test direction needs to be adjusted, pull the first T-pin 9 out of the T-slot and rotate the movable platform 8 clockwise or counterclockwise by 90°, 180° and 270° respectively to adjust the installation direction of the test specimen 20. Similarly, when the vertical test direction needs to be adjusted again, pull the first T-pin 9 out of the T-slot and replace it with another T-pin, and rotate the movable platform 8 clockwise or counterclockwise by 90°, 180° and 270° respectively to adjust the installation direction of the test specimen 20.

[0060] To further increase the vertical testing orientation of the test specimen 20, the present invention provides a second T-shaped pin 18 on the main body of the platform, and the second T-shaped pin 18 is located on the opposite side of the test specimen 20; the second T-shaped pin 18 can be inserted into any T-shaped groove.

[0061] Specifically, such as Figure 3 As shown, both the first T-pin 9 and the second T-pin 18 include a horizontal portion and a vertical portion; the second T-pin 18 is located on the central axis of the table body parallel to the two insert plates, and the angle between the second T-pin 18 and the first T-pin 9 on both sides differs by 90°. The width of the horizontal portion of the three sets of T-pins is 1:5 with the width of the vertical portion, which is the same as the size of the T-slot.

[0062] It should be emphasized that the length of the lateral portion of the two first pins is greater than the length of the lateral portion of the second pin.

[0063] It should be noted that the first T-slot includes a bottom horizontal slot and a top vertical slot; the thickness of the movable platform 8 is equal to the width of the top vertical slot. Furthermore, the ratio of the width of the bottom horizontal slot to the width of the top vertical slot is 1:5.

[0064] To securely fix the movable platform 8 to the fixed base 2, the boss 3 of the present invention is surrounded by a constraint baffle 7, which is parallel to the adjacent side of the boss 3. Furthermore, the height of the constraint baffle 7 is the same as the height of the boss 3 and is equal to 2 / 5 of the width of the bottom of the T-slot. The T-slot of the fixed base 2 extends horizontally through the boss 3 and the constraint baffle 7.

[0065] Specifically, eight sets of constraint baffles 7 surround the boss 3. The constraint baffles 7 are parallel to the edges of the adjacent boss 3. The height of the constraint baffles 7 is the same as the height of the boss 3, and both are equal to 2 / 5 of the bottom width of the T-slot. The T-slot passes through the boss 3 and the constraint baffles 7 in the horizontal direction. The distance between the constraint baffles 7 and the boss 3 of the base is the depth value of the bottom transverse groove of the T-slot.

[0066] In order to constrain the movable platform 8, the test direction conversion unit of the test specimen of the present invention also includes two fixing components 12; when the second T-pin 18 or one of the first T-pins 9 on the movable platform 8 is inserted into any T-slot on the fixed base 2, the movable platform 8 is fixed by the two fixing components 12.

[0067] Specifically, such as Figure 4 As shown, the two fixing components 12 of the present invention are two safety pins; the two safety pins are a first safety pin and a second safety pin, and the first safety pin and the second safety pin have the same structure; both the first safety pin and the second safety pin include a pin body, which is rectangular in shape. Along the length direction of the pin body, the pin body is provided with a vertical safety pin locking end 13 and a horizontal safety pin locking end 15, which are located on opposite surfaces; a groove is provided on the end face of the vertical safety pin locking end 13, and the width of the groove is... The width of the insert plate on the movable platform 8 is equal to the width of the insert plate. In addition, two parallel vertical pins 19 are provided in the groove, and movable panel safety holes 11 are provided at both ends along the length of the insert plate. When the movable platform 8 is inserted vertically into the first T-slot on the boss 3, the first safety pin and the second safety pin are inserted on the outer side of the two insert plates of the movable platform 8, respectively. At this time, the two vertical pins 19 of the first safety pin and the second safety pin can be inserted into the movable panel safety holes 11 on the corresponding insert plates to achieve the vertical safety pin locking state, thereby fixing the movable platform 8.

[0068] In addition, in order to fix the first and second safety pins, grooves are provided on both end faces along the length of the safety pin body. The grooves are along the width and height of the safety pin body. By setting the grooves, the two ends of the pin body respectively form safety pin wings. The safety pin wings are provided with fixing holes, and the base is provided with safety pin fixing holes 17. The fixing holes on the safety pin wings and the safety pin fixing holes 17 on the base can be aligned and connected by bolts.

[0069] A cubic block-shaped horizontal pin is provided at the locking end 15 of the horizontal safety pin; in addition, safety pin insertion holes 4 are opened on the four sides of the boss 3. The opening position of the safety pin insertion hole 4 is located between the constraint baffle 7 and the boss 3, adjacent to the extension surface of the first T-slot; the depth direction of the safety pin insertion hole 4 penetrates the fixed base 2, and the length and width of the safety pin insertion hole 4 are equal to the width of the bottom transverse groove of the first T-slot (i.e., the bottom width of the first T-slot) and the height; when the movable platform 8 is inserted into the first T-slot on the boss 3 in a horizontal manner, the first safety pin and the second safety pin are respectively inserted at both ends of the second pin of the movable platform 8. At this time, the horizontal pins of the first safety pin and the second safety pin can be inserted into the safety pin insertion hole 4 on the fixed base 2 to achieve the horizontal safety pin locking state, thereby fixing the movable platform 8.

[0070] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A centrifugal constant acceleration test system capable of adjusting twelve test orientations, characterized in that, It includes a support cantilever, a counterweight cantilever, and a rotating component; the support cantilever and the counterweight cantilever are located at both ends of the rotating component, and the rotating component is used to drive the support cantilever and the counterweight cantilever to rotate; the counterweight cantilever is used to apply a counterweight of equal mass to the support cantilever. The support cantilever is equipped with a test specimen test direction conversion unit, which is used to change the test direction of the test specimen without changing the mass of the support cantilever. The test direction conversion unit for the test specimen includes a fixed base, a movable platform, a clamp, and a locking assembly; The fixed base is fixed to the cantilever; the test piece is fixed to the movable table by a clamp, the movable table is disposed on the fixed base and locked by a locking component, and the test direction of the test piece can be changed by adjusting its installation direction. The fixed base is cuboid in shape and is fixed to the cantilever. Three sides of the fixed base are parallel to the corresponding sides of the cantilever. A boss is located at the geometric center of the fixed base in plan view. The length and width of the boss are equal, and both the length and width of the boss are greater than the height of the boss. The boss has two inverted first T-slots, and the length direction of the bottom of the two inverted first T-slots is parallel to the four sides of the corresponding boss. In addition, the two inverted first T-slots intersect and are perpendicular to each other, forming an inverted cross-shaped combination of first T-slots. A square opening is provided in the center of the boss. The square opening penetrates the boss along its depth direction. The position of the test specimen on the movable platform is fixed; the movable platform can be installed horizontally on the fixed base or vertically on the fixed base. The process of adjusting the test orientation of the test specimen is as follows: When the test specimen is subjected to a horizontal test, the movable platform is inserted into any one of the T-slots on the fixed base in a horizontal position. Under the front body of the horizontal installation, the movable platform is rotated 90°, 180°, and 270° clockwise or counterclockwise to adjust the installation orientation of the test specimen, achieving four possible combinations of two orientations. When the movable platform is inserted into the T-slot on the fixed base in a vertical position, under the front body of the vertical installation, two different faces of the movable platform are rotated 90°, 180°, and 270° clockwise or counterclockwise respectively to adjust the installation orientation of the test specimen, achieving eight possible combinations of four orientations. The locking components include a first safety pin and a second safety pin with identical structures; Both the first and second safety pins include a pin body; the pin body is rectangular and has a vertical safety pin locking end and a horizontal safety pin locking end that are opposite each other along the length of the pin body. The end face of the locking end of the vertical safety pin is provided with a groove, and two parallel vertical pins are provided in the groove. When the movable panel is installed on the fixed base in a horizontal manner, the vertical pins are used to lock the movable panel. Grooves are provided on both end faces along the length of the pin body. The grooves are along the width and height of the pin body. By providing the grooves, the two ends of the safety pin body respectively form safety pin wings. The safety pin wing is provided with a fixing hole; the base is provided with a safety pin fixing hole, and the fixing hole on the safety pin wing and the safety pin fixing hole on the base can be aligned and connected by bolts; The horizontal safety pin locking end is provided with a cubic block-shaped horizontal pin; When the movable platform is fixed to the fixed base in a horizontal manner, the movable platform is locked with a horizontal pin.

2. The centrifugal constant acceleration test system capable of adjusting twelve test orientations according to claim 1, characterized in that, The test piece is provided with multiple connecting lugs, and the fixture is provided with multiple mounting holes, the number of which is equal to the number of connecting lugs; the test piece is fixedly connected to the fixture through its connecting lugs and the mounting holes on the fixture.

3. The centrifugal constant acceleration test system capable of adjusting twelve test orientations according to claim 2, characterized in that, The clamp is a rectangular plate, and there are four mounting holes, which are distributed in a rectangular shape on the clamp.

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