Auxiliary device for coaxial method electromagnetic parameter test sample preparation
By installing multiple coaxial sleeves on the central axis and setting up limiting parts, the problem of low preparation accuracy of coaxial sample is solved, and high accuracy and stability of electromagnetic parameter testing is achieved.
Patent Information
- Application Number
- CN202421390035.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-06-18
AI Technical Summary
It is difficult for the prior art to effectively prepare coaxial samples that meet standard sizes, resulting in large fluctuations in the electromagnetic parameter test results and affecting data analysis.
An auxiliary device for preparing coaxial electromagnetic parameter test sample is designed. By placing multiple coaxial sleeves on the central axis and setting limiting parts at both ends of the central axis, the test sample is ensured to be in close contact between the sleeves, prevent displacement and ensure accuracy.
The coaxial sample prepared by this device is accurate in outer diameter and meets standard size, which improves the accuracy and stability of electromagnetic parameter testing.
Smart Images
Figure CN222979200U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electromagnetic parameter testing, in particular to an auxiliary device for preparing a test sample for electromagnetic parameter testing by the coaxial method. Background Technique
[0002] The "Test Method for Complex Dielectric Constant and Complex Permeability of Microwave High-Loss Solid Materials" (SJ 20512-1995) stipulates the standards for testing the complex dielectric constant and complex permeability of solid materials by the coaxial method. The solid materials need to be processed into rings with an outer diameter of 7 mm and an inner diameter of 3.04 mm (referred to as coaxial specimens). It also requires that the gap between the coaxial specimen and the test fixture should be as small as possible. Therefore, high processing accuracy of the coaxial specimen is required. For testing the electromagnetic parameters of common composite materials, coating and other bulk materials, it is difficult to achieve the standard coaxial specimen, and there is no special processing tooling at present. The coaxial specimens made by cutting tools such as cutters have low dimensional accuracy, resulting in large fluctuations in the electromagnetic parameter test results and affecting subsequent data analysis and processing. Therefore, there is an urgent need for a tooling for preparing coaxial specimens to meet the requirements of the standard size of coaxial specimens, which will greatly improve the accuracy of material electromagnetic parameter testing.
[0003] In view of this, the inventor provides an auxiliary device for preparing a test sample for electromagnetic parameter testing by the coaxial method to solve the above technical problems. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the above-mentioned disadvantages of the prior art and provide an auxiliary device for preparing a test sample for electromagnetic parameter testing by the coaxial method. By setting a central axis, a plurality of coaxial and identically structured sleeves are sleeved on the central axis. The test sample is sleeved on the central axis and located between any two adjacent sleeves. Limiting members are also provided at both ends of the central axis. The limiting members limit the positions of the sleeves and the test sample and make the sleeves and the test sample in close contact without displacement, ensuring that the processed test sample has high precision and stable electromagnetic parameter test results.
[0005] The purpose of the utility model is solved by the following technical solutions:
[0006] The utility model provides an auxiliary device for preparing a test sample for electromagnetic parameter testing by the coaxial method, including a central axis. A plurality of coaxial and identically structured sleeves are sleeved on the circumference of the central axis. A test sample is sleeved on the circumference of the central axis and located between any two adjacent sleeves. Limiting members are detachably connected to both ends of the central axis respectively. The limiting members are used to lock the positions of the sleeves and the test sample on the central axis and make the sleeves and the test sample in close fit.
[0007] Furthermore, the thickness of the test sample is not limited here, and preferably is 0.8 mm to 4 mm.
[0008] Further, external threads are provided at both ends of the central axis, and threaded holes matching the external threads of the central axis are formed in each of the limiting members.
[0009] Further, the threaded holes in the limiting members are threaded blind holes, and the length of the threaded blind holes is greater than or equal to the length of the external threads provided on the central axis.
[0010] Further, the length of the central axis is L, and L is equal to the sum of the lengths of all the external threads, the sum of the heights of all the sleeves, and the sum of the thicknesses of all the test samples.
[0011] Further, both the sleeve and the test sample are in clearance fit with the central axis.
[0012] Further, the sleeve is made of stainless steel material.
[0013] Specifically, the sleeve is a hollow cylinder.
[0014] Compared with the prior art, the technical solution provided by the present utility model has the following beneficial effects:
[0015] The present utility model discloses an auxiliary device for preparing a coaxial method electromagnetic parameter test sample. The device is provided with a central axis, and a plurality of coaxial and identically structured sleeves are sleeved on the central axis. The test sample is sleeved on the central axis and located between any two adjacent sleeves. Limiting members are also provided at both ends of the central axis. The limiting members are used to limit the positions of the sleeves and the test samples and make all the sleeves and the test samples in close contact. In order to ensure that the test sample does not displace during the cutting of the test sample, the cutting accuracy is guaranteed, and the cutting is convenient; in addition, the test sample is arranged between the sleeves, and the size of the sleeve is a standard size. During the cutting process, the excess part of the test sample is cut off along the outer edge of the sleeve, and thus the target test sample is obtained. This method can ensure that the obtained target test sample has an accurate outer diameter and meets the standard size; in addition, the device can connect different numbers of test samples in series at one time according to requirements, so the efficiency of preparing the target test sample is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principle of the present utility model.
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other accompanying drawings can also be obtained based on these accompanying drawings without creative efforts.
[0018] Figure 1 This is a schematic structural diagram of an auxiliary device for preparing a sample for coaxial method electromagnetic parameter testing according to the present utility model;
[0019] Figure 2 This is a schematic structural diagram of a sleeve of an auxiliary device for preparing a sample for coaxial method electromagnetic parameter testing according to the present utility model;
[0020] Figure 3 This is a schematic structural diagram of a central shaft of an auxiliary device for preparing a sample for coaxial method electromagnetic parameter testing according to the present utility model;
[0021] Figure 4 This is a schematic structural diagram of a limiting member of an auxiliary device for preparing a sample for coaxial method electromagnetic parameter testing according to the present utility model.
[0022] Wherein: 1 is the central shaft; 2 is the sleeve; 3 is the limiting member; 11 is the external thread; 31 is the threaded hole; A is the test sample. Specific embodiments
[0023] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model. On the contrary, they are merely examples of devices consistent with some aspects of the present utility model detailed in the appended claims.
[0024] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the drawings and embodiments.
[0025] Embodiment 1
[0026] See Figure 1 , the embodiment of the present utility model provides an auxiliary device for preparing a sample for coaxial method electromagnetic parameter testing, including a central shaft 1. Four coaxial and identically structured sleeves 2 are sleeved on the circumference of the central shaft 1. A test sample A is sleeved on the circumference of the central shaft 1 and located between any two adjacent sleeves 2. Limiting members 3 are detachably connected to both ends of the central shaft 1 respectively. The limiting members 3 are used to lock the positions of the four sleeves 2 and the three test samples A on the central shaft 1 and make all the sleeves 2 and the test samples A in close contact to ensure that no displacement occurs.
[0027] It should be noted that the number of sleeves 2 can be set according to actual needs.
[0028] Furthermore, external threads 11 are provided at both ends of the central shaft 1, and threaded holes 31 matching the external threads 11 of the central shaft 1 are opened on each limiting member 3.
[0029] Further, the threaded hole 31 on the limiting member 3 is a threaded blind hole, and the length of the threaded blind hole is greater than or equal to the length of the external thread 11 provided on the central shaft 1.
[0030] Specifically, in this embodiment, the length of the threaded blind hole is equal to the length of the external thread 11 provided on the central shaft 1.
[0031] Further, the limiting member 3 has a structure conforming to the grasping of the human hand.
[0032] Specifically, as Figure 4 shown, in this embodiment, the limiting member 3 has a frustum structure, and the frustum structure can just be held by the palm of the hand, and the comfort of the fingers is relatively high during operation. A threaded blind hole is provided at the center of the top surface of the frustum structure, and external threads 11 matching the threaded blind hole are respectively provided at both ends of the central shaft 1. The limiting member 3 is connected and fixed to the central shaft 1 through the interaction between the threaded blind hole and the external thread 11.
[0033] In this embodiment, the outer diameter dimension of the top surface of the frustum structure is the same as the outer diameter dimension of the sleeve 2. Specifically, the outer diameter R4 of the top surface of the frustum structure and the outer diameter R2 of the sleeve 2 are both 7 mm, and the outer diameter R5 of the bottom surface of the frustum structure is 12 mm.
[0034] Further, the length of the central shaft 1 is L, and the L is equal to the sum of the lengths of all the external threads 11, the sum of the heights of all the sleeves 2, and the sum of the thicknesses of all the test samples A. Specifically, as Figure 1 、 2 、3 shown, in this embodiment, the length of each external thread 11 is 7.5 mm, the length L1 of each sleeve 2 is 20 mm, and the thickness of each test sample A is 3 mm, that is, the length of L is obtained as 103 mm. It should be noted that the length of the central shaft 1 is determined according to the actual working conditions, as long as the above conditions are met.
[0035] Further, both the sleeve 2 and the test sample A are in clearance fit with the central shaft 1.
[0036] Specifically, in this embodiment, the diameter R3 of the central shaft 1 is 3.0 mm, the inner diameter R1 of the sleeve 2 is 3.04 mm, the outer diameter R2 of the sleeve 2 is 7 mm, and the inner diameter of the test sample A is 3.04 mm.
[0037] As Figure 2 shown, the sleeve 2 is a hollow cylinder and is made of quenched stainless steel material.
[0038] Embodiment 2
[0039] This embodiment provides an auxiliary device for preparing a test sample for measuring electromagnetic parameters by the coaxial method, including a central axis 1. Four coaxial and identically structured sleeves 2 are sleeved on the circumference of the central axis 1. A test sample A is sleeved on the circumference of the central axis 1 between any two adjacent sleeves 2. Limiting members 3 are detachably connected to both ends of the central axis 1 respectively. The limiting members 3 are used to lock the positions of the four sleeves 2 and the three test samples A on the central axis 1 and make all the sleeves 2 and the test samples A in close contact to ensure that no displacement occurs.
[0040] It should be noted that the number of sleeves 2 can be set according to actual needs.
[0041] Further, external threads 11 are provided at both ends of the central axis 1, and threaded holes 31 matching the external threads 11 of the central axis 1 are formed in each limiting member 3.
[0042] In this embodiment, the threaded holes 31 in the limiting members 3 penetrate through the centers of the limiting members 3. The external threads 11 on the central axis 1 interact with the threaded holes 31 to lock the positions of the four sleeves 2 and the three test samples A on the central axis 1 and make all the sleeves 2 and the test samples A in close contact to ensure that no displacement occurs.
[0043] It should be noted that the length of the central axis 1 is not limited in this embodiment, as long as it meets the requirement that the limiting members 3 lock the positions of the sleeves 2 and the test samples A to ensure that no displacement occurs.
[0044] Further, both the sleeves 2 and the test samples A are in clearance fit with the central axis 1.
[0045] Further, the sleeve 2 is a hollow cylinder made of quenched stainless steel material.
[0046] The specific process of this device in practical application is as follows:
[0047] Select a test sample A with a thickness meeting the requirements according to the standard SJ 20512 - 1995, and use a pistol drill to drill a threaded blind hole at the center of the test sample A so that the test sample A and the central axis 2 are in clearance fit. Then, in the order of sleeve 2, test sample A, sleeve 2, sleeve 2 and test sample A are sleeved on the circumferential surface of the central axis 1 in sequence, ensuring that each test sample A is clamped between two sleeves 2. Then, the limiting members 3 are fastened to both ends of the central axis 2. Compressive stress is applied to the sleeves 2 through the limiting members 3 so that the test sample A is in close contact with the sleeves 2 at its two ends to ensure the relative position of the test sample A is fixed. Finally, use scissors or a utility knife to cut off the material of the non - clamped part of the sleeve 2, and use sandpaper to polish the edge of the test sample A smooth, then the target test sample is obtained.
[0048] The above are only specific embodiments of the present utility model, enabling those skilled in the art to understand or implement the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model.
[0049] It should be understood that the present utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present utility model is only limited by the appended claims.
Claims
1. An auxiliary device for preparing samples for electromagnetic parameter testing by coaxial method, characterized in that: The invention comprises a central axis (1), wherein a plurality of coaxial sleeves (2) with the same structure are sleeved on the circumference of the central axis (1), a test sample (A) is sleeved on the circumference of the central axis (1) and between any two adjacent sleeves (2), and both ends of the central axis (1) are detachably connected to limit members (3), wherein the limit members (3) are used to lock the positions of the sleeves (2) and the test sample (A) on the central axis (1) and to make the sleeves (2) and the test sample (A) fit tightly.
2. The auxiliary device for preparing samples for electromagnetic parameter testing by the coaxial method according to claim 1, characterized in that: Both ends of the central shaft (1) are provided with external threads (11), and each of the limiting members (3) is provided with a threaded hole (31) matching the external threads (11) of the central shaft (1).
3. The auxiliary device for preparing samples for coaxial electromagnetic parameter testing according to claim 2, characterized in that: The threaded hole (31) on the limiting member (3) is a threaded blind hole, and the length of the threaded blind hole is greater than or equal to the length of the external thread (11) provided on the central axis (1).
4. The auxiliary device for preparing samples for coaxial electromagnetic parameter testing according to claim 3, characterized in that: The length of the central axis (1) is L, which is equal to the sum of the lengths of all external threads (11), the heights of all sleeves (2), and the thicknesses of all test samples (A).
5. The auxiliary device for preparing samples for electromagnetic parameter testing by coaxial method according to claim 3, characterized in that: The limiting member (3) is a structure suitable for grasping by human hands.
6. The auxiliary device for preparing samples for electromagnetic parameter testing by coaxial method according to claim 1, characterized in that: The sleeve (2) and the test sample (A) are both in clearance fit with the central axis (1).
7. The auxiliary device for preparing samples for electromagnetic parameter testing by coaxial method according to claim 1, characterized in that: The sleeve (2) is made of stainless steel.