A flexible material testing fixture based on quasi-optical cavity method

Abstract

A flexible material test fixture based on quasi-optical cavity method, comprising: lofting table (1), test fixture lower (2), flexible material (3), test fixture upper (4), screw (5), pressure piece (6) and first pin (7). In order to prevent the deformation of the flexible material (3) during the test, the test fixture lower (2) and the test fixture upper (4) are used to fix the flexible material (3), in addition, the test fixture is provided with a through hole, and the diameter of the through hole is suitable for the quasi-optical cavity beam to act on the flexible material (3). In order to ensure that the surface of the flexible material (3) is flat during sample preparation, the lofting table (1) and the pressure piece (6) jointly act on the flexible material (3) from both ends of the test fixture, then the test fixture is fixed by using the screw (5), finally the test fixture is put into the quasi-optical cavity for testing. The innovation of the present application lies in that the outer ring + inner cylindrical structure of the pressure piece is used to press the test fixture, so that the flexible material (3) is uniformly stressed, thereby obtaining a sample with flat surface, which is beneficial to the quasi-optical cavity test.

Description

Technical Field

[0001] A flexible material testing fixture based on the quasi-optical cavity method is disclosed, relating to the field of electromagnetic property parameter testing, and particularly to flexible material testing technology based on the quasi-optical cavity method. Background Technology

[0002] With the development of microwave measurement technology, the electromagnetic parameter testing of flexible materials has attracted widespread attention. However, the thinness and softness of flexible materials make them difficult to apply in quasi-optical cavity testing. This is because quasi-optical cavity testing requires extremely high precision and a smooth, flat sample surface. Due to the softness of flexible materials, it is difficult to ensure a tight fit between samples on the stage, leading to significant testing errors. Furthermore, although a metal plate can be used to flatten the flexible sample before testing, deformation during testing is still inevitable, resulting in poor test results. Based on the issue of sample flexibility, this invention designs a test fixture to fix the sample, preventing deformation during testing. Simultaneously, it proposes a sample preparation method that better maintains surface flatness during preparation, thereby improving the accuracy of flexible material testing in the quasi-optical cavity method. Summary of the Invention

[0003] This invention addresses the problem of poor testing results for flexible materials in quasi-optical cavity testing due to surface unevenness or easy deformation. It designs a flexible material testing fixture based on the quasi-optical cavity method, which maintains the shape of the flexible material sample under the fixture's support, thus minimizing deformation during testing. Furthermore, this invention provides a sample preparation method that allows the flexible material sample to be uniformly stressed under mold stamping, resulting in a smooth surface and reducing the difficulty of quasi-optical cavity testing for flexible materials.

[0004] To achieve the above-mentioned objectives, the technical solution of this invention is as follows: A flexible material testing fixture based on the quasi-optical cavity method, as shown in the attached figure. Figure 1As shown, the fixture includes: a placement stage 1, a lower test fixture 2, a flexible material 3, an upper test fixture 4, screws 5, a pressure component 6, and a first pin 7. The test fixture, comprising the lower test fixture 2, the upper test fixture 4, and screws 5, is made of low electromagnetic loss material. The flexible material 3 is fixed by the test fixture to prevent material deformation during testing. Furthermore, the through-hole in the test fixture ensures that the quasi-optical cavity beam acts on the flexible material 3. The placement stage 1 has a cylindrical sample stage with a diameter matching that of the quasi-optical cavity sample stage. The pressure component 6 is a combined structure of an outer ring and an inner cylinder, wherein the diameter of the inner cylinder matches the diameter of the sample stage. The lower test fixture 2 and the upper test fixture 4... Each section has through holes with a diameter just large enough to allow the sample-laying stage 1 and pressure member 6 to pass through and act on the flexible material 3. To ensure that the surface of the flexible material 3 remains flat during sample preparation, the following method is adopted: First, place the sample-laying stage 1 on a flat table. Fix the flexible material 3 using the lower test fixture 2 and the upper test fixture 4. Then place it on the sample-laying stage 1. Next, place the pressure member 6 on the test fixture, so that its inner cylinder presses down on the middle part of the flexible material 3, while its outer ring presses down on the outer part of the flexible material 3. Finally, use screws 5 to lock the lower test fixture 2 and the upper test fixture 4, and remove the sample-laying stage 1 and pressure member 6. The obtained test fixture can then be inserted into the quasi-optical cavity for testing.

[0005] As a preferred method, see attached Figure 2 As shown, the pressure component 6 consists of an outer ring 8, an inner cylinder 9, and a spherical handle 10. The inner diameter of the outer ring 8 is slightly larger than the diameter of the inner cylinder 9. The inner cylinder 9 has two rows of pin holes, where pin 11 restricts the outer ring 8 from sliding downwards, and first pin 7 restricts the outer ring 8 from sliding upwards. Therefore, second pin 11 and first pin 7 restrict the outer ring 8 to the middle position of the inner cylinder 9. Its function is that when the pressure component 6 is used to press the inner cylinder 9 downwards against the flexible material 3, the first pin 7 will hold the outer ring 8 and press it downwards against the outer periphery of the flexible material 3, so that the entire material is evenly stressed. When the pressure component 6 is removed, the second pin 11 can lift the outer ring and remove it together.

[0006] As a preferred method, see attached Figure 3 As shown, the inner wall of the outer ring 8 has an outer ring groove 12, which is the installation position of the second pin 11. Therefore, when the pressure member 6 is lifted, the second pin 11 in the inner cylinder 9 can hold the outer ring groove 12, so that the outer cylinder 8 will not fall out of the pressure member 6.

[0007] As a preferred embodiment, the height of the lower 2 of the test fixture is the same as the height of the cylindrical sample stage of the lofting table 1. The purpose is that when the test fixture is mounted on the lofting table 1, the cylindrical sample stage just contacts the flexible material 3 in the middle of the test fixture.

[0008] As a preferred embodiment, the middle through holes of the lower 2 and upper 4 of the test fixture are both chamfered. When installed on the sample placement table 1, the chamfer of the former is required to face down and the chamfer of the latter is required to face up. The purpose is that during the sample preparation process, the sample placement table 1 and the pressure component 6 will squeeze the flexible material 3 from both the top and bottom. Therefore, the presence of the chamfer can prevent the two from being stuck by the inner wall of the test fixture during the squeezing process.

[0009] As a preferred embodiment, the upper 4 and lower 2 of the test fixture are provided with through holes at four identical corners. The difference is that the former is a through hole without threads, while the latter is a through hole with threads.

[0010] As a preferred method, see attached Figure 2 As shown, the inner cylinder 9 of the pressure component 6 is equipped with a spherical handle 10. After the sample preparation is completed, the pressure component 6 can be removed through the spherical handle 10.

[0011] As a preferred embodiment, the cylindrical sample stage of the sample stage 1 should have a height equal to or less than that of the sample stage of the quasi-optical cavity testing system.

[0012] The advantages of this invention are: I. The design of the test fixture allows flexible materials to be made into circular samples with a sample stage diameter without the need for traditional testing methods. Instead, the sample size only needs to be larger than the sample stage, thereby reducing the sample preparation difficulty for testers. Second, during sample preparation, the pressure structure of the outer ring and inner cylinder of the pressure component is used to apply pressure to the flexible material sample, which can make the flexible material sample uniformly stressed without surface wrinkles. Therefore, the surface of the flexible material sample is kept flat during the sample preparation process, thereby improving the accuracy of the quasi-optical cavity method for testing flexible material samples. Attached Figure Description

[0013] Appendix Figure 1 This is a structural diagram of a flexible material testing fixture based on the quasi-optical cavity method.

[0014] Appendix Figure 2 This is a structural diagram of the pressure component.

[0015] Appendix Figure 3 This is a structural diagram of the outer ring in a pressure component.

[0016] Appendix Figure 4 This is a schematic diagram of the test of a flexible material sample using a quasi-optical cavity.

[0017] Among them, 1 is the sample placement stage, 2 is the lower test fixture, 3 is the flexible material, 4 is the upper test fixture, 5 is the screw, 6 is the pressure component, 7 is the first pin, 8 is the outer ring, 9 is the inner cylinder, 10 is the spherical handle, 11 is the second pin, 12 is the outer ring groove, 13 is the quasi-optical cavity, 14 is the quasi-optical cavity test sample stage, and 15 is the sample preparation fixture. Detailed Implementation

[0018] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0019] A flexible material testing fixture based on the quasi-optical cavity method, as shown in the attached figure. Figure 1 As shown, the fixture includes: a placement stage 1, a lower test fixture 2, a flexible material 3, an upper test fixture 4, screws 5, a pressure component 6, and a first pin 7. The test fixture, including the lower test fixture 2, the upper test fixture 4, and the screws 5, is made of low electromagnetic loss material. The flexible material 3 is fixed by the test fixture to prevent material deformation during the test. In addition, the through holes in the test fixture ensure that the quasi-optical cavity beam acts on the flexible material 3. The placement stage 1 has a cylindrical sample stage with a diameter consistent with that of the quasi-optical cavity sample stage. The pressure component 6 is a combined structure of an outer ring and an inner cylinder, wherein the diameter of the inner cylinder is consistent with the diameter of the sample stage. Both the lower test fixture 2 and the upper test fixture 4 have through holes in the middle, with a diameter just large enough to allow the placement stage 1 and the pressure component 6 to pass through and act on the flexible material 3.

[0020] Furthermore, as shown in the appendix Figure 2 As shown, the pressure component 6 consists of an outer ring 8, an inner cylinder 9, and a handle 10. The inner diameter of the outer ring 8 is slightly larger than the diameter of the inner cylinder 9. The inner cylinder 9 has two rows of pin holes, with the second pin 11 restricting the outer ring 8 from sliding downwards and the first pin 7 restricting the outer ring 8 from sliding upwards. Therefore, the second pin 11 and the first pin 7 restrict the outer ring 8 to the middle position of the inner cylinder 9. Its function is that when the pressure component 6 is used to press the inner cylinder 9 downwards against the flexible material 3, the first pin 7 will hold the outer ring 8 and press it downwards against the outer periphery of the flexible material 3, so that the entire material is evenly stressed. When the pressure component 6 is removed, the second pin 11 can lift the outer ring and remove it together.

[0021] Furthermore, as shown in the appendix Figure 3 As shown, the inner wall of the outer ring 8 has an outer ring groove 12, which is the installation position of the second pin 11. Therefore, when the pressure member 6 is lifted, the second pin 11 in the inner cylinder 9 can hold the outer ring groove 12, so that the outer cylinder 8 will not fall out of the pressure member 6.

[0022] Furthermore, the height of the test fixture 2 is consistent with the height of the cylindrical sample stage of the lofting table 1. The purpose is that when the test fixture is mounted on the lofting table 1, the cylindrical sample stage just contacts the flexible material 3 in the middle of the test fixture.

[0023] Furthermore, the middle through holes of the lower 2 and upper 4 of the test fixture are both chamfered. When installed on the sample placement table 1, the chamfer of the former is required to face down and the chamfer of the latter is required to face up. The purpose is that during the sample preparation process, the sample placement table 1 and the pressure component 6 will squeeze the flexible material 3 from both the top and bottom. Therefore, the presence of the chamfer can prevent the two from being stuck by the inner wall of the test fixture during the squeezing process.

[0024] Furthermore, both the upper 4 and lower 2 of the test fixture have through holes at four identical corners. The difference is that the former is a through hole without threads, while the latter is a through hole with threads.

[0025] Furthermore, as shown in the appendix Figure 2 As shown, the inner cylinder 9 of the pressure component 6 is equipped with a spherical handle 10. After the sample preparation is completed, the pressure component 6 can be removed through the spherical handle 10.

[0026] Furthermore, the cylindrical sample stage of the sampling stage 1 should have a height equal to or less than that of the sample stage of the quasi-optical cavity testing system.

[0027] Regarding the above description, the assembly method of the pressure component 6 is as follows: First, install the second pin 11 on the inner cylinder 9, then put the outer ring 8 on the inner cylinder 9 from top to bottom, and ensure that the pin 11 falls into the groove 12 of the outer ring. Next, install the first pin 7, so that the outer ring 8 is restricted between the first pin 7 and the second pin 11. Finally, install the ball handle 10.

[0028] To achieve a smooth surface on the flexible material 3 as described above, the following sample preparation method is adopted: First, place the sample placement stage 1 on a flat table. Clamp the flexible material 3 using the lower test fixture 2 and the upper test fixture 4, and then place it on the sample placement stage 1. Next, place the pressure member 6 on the test fixture, so that its inner cylinder 9 presses down on the middle part of the flexible material 3, while the outer ring 8 presses down on the outer periphery of the flexible material 3. Finally, use screws 5 to lock the lower test fixture 2 and the upper test fixture 4, and remove the sample placement stage 1 and the pressure member 6. The resulting test fixture can then be placed on the quasi-optical cavity test sample stage 14 for testing. The test schematic diagram is attached. Figure 4 As shown.

Claims

1. A flexible material testing fixture based on the quasi-optical cavity method, comprising: The test fixture comprises a lower test fixture (2), a flexible material (3), an upper test fixture (4), a screw (5), a pressure component (6), and a first pin (7). The test fixture consists of a lower test fixture (2), an upper test fixture (4), and a screw (5), all made of low electromagnetic loss materials. The flexible material (3) is fixed by the test fixture to prevent material deformation during testing. Furthermore, the through-hole in the test fixture ensures that the quasi-optical cavity beam acts on the flexible material (3). The lower test fixture (1) has a cylindrical sample stage with a diameter consistent with the quasi-optical cavity sample stage. The pressure component (6) is a combined structure of an outer ring and an inner cylinder, with the inner cylinder having a diameter consistent with the sample stage diameter. The lower test fixture (2) and the upper test fixture (4) are located between... All have through holes with a diameter just large enough to allow the layout stage (1) and pressure component (6) to pass through and act on the flexible material (3). To ensure that the surface of the flexible material (3) remains flat during sample preparation, the following method is adopted: First, place the layout stage (1) on a flat table. Fix the flexible material (3) using the lower test fixture (2) and the upper test fixture (4). Then place it on the layout stage (1). Next, place the pressure component (6) on the test fixture, so that its inner cylinder presses down on the middle part of the flexible material (3), while the outer ring presses down on the outer part of the flexible material (3). Finally, use screws (5) to lock the lower test fixture (2) and the upper test fixture (4), and remove the layout stage (1) and pressure component (6). The obtained test fixture can then be put into the quasi-optical cavity for testing.

2. The flexible material testing fixture based on the quasi-optical cavity method according to claim 1, characterized in that, The inner diameter of the outer ring of the pressure component (6) is slightly larger than the diameter of the inner cylinder, so the two are movable. In addition, two first pins (7) are installed at the upper end of the inner cylinder. When the inner cylinder presses down on the flexible material (3), the first pins (7) will press against the outer ring and press down on the outer periphery of the flexible material (3), so that the flexible material (3) is evenly stressed.

3. The flexible material testing fixture based on the quasi-optical cavity method according to claim 1, characterized in that, The height of the test fixture (2) is the same as the height of the cylindrical sample stage of the sample placement table (1), the purpose of which is: When the test fixture is placed on the sample placement stage (1), the cylindrical sample stage just comes into contact with the flexible material (3) in the middle of the test fixture.

4. The flexible material testing fixture based on the quasi-optical cavity method according to claim 1, characterized in that, The middle through holes of the lower (2) and upper (4) test fixtures are both chamfered. When installed on the layout table (1), the chamfer of the former should face down and the chamfer of the latter should face up.

5. The flexible material testing fixture based on the quasi-optical cavity method according to claim 1, characterized in that, Both the upper (4) and lower (2) of the test fixture have through holes at four identical corners, the difference being: The former is a through hole without threads, while the latter is a through hole with threads.

6. The flexible material testing fixture based on the quasi-optical cavity method according to claim 2, characterized in that, The inner cylinder (9) of the pressure component (6) is equipped with a spherical handle (10). After the sample is prepared, the pressure component (6) can be removed through the spherical handle (10).

7. The flexible material testing fixture based on the quasi-optical cavity method according to claim 3, characterized in that, The cylindrical sample stage of the sample stage (1) should have a height equal to or less than that of the sample stage of the quasi-optical cavity test system.

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