Electromagnetic interference test tool with same impedance

Abstract

The utility model discloses an electromagnetic interference testing tool with the same impedance, which comprises a cup body loaded with normal saline, a plurality of groups of mutually symmetrical assembling grooves are vertically arranged on the inner wall of the cup body along the central axis of the cup body, the axial length of the assembling grooves is consistent with the height of the cup body, and the assembling grooves are matched with the assembling grooves. An installation assembly used for installing a to-be-tested cable is arranged in each assembling groove. The tool enables the electrode contacts of each to-be-tested cable to be at the same height, prevents each electrode contact from being contacted, and improves the efficiency and accuracy of electromagnetic interference testing.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic interference testing technology, and specifically to an electromagnetic interference testing fixture with the same impedance. Background Technology

[0002] Currently, in the process of electromagnetic interference testing of electromechanical equipment, the electrodes of the cables under test at both ends are usually placed directly into a cup containing physiological saline. Since multiple electrode connectors of the cables under test are placed in the cup, multiple electrode connectors may come into contact with each other and cause short circuits. Alternatively, if the two electrode connectors of the same pair are randomly placed in the physiological saline, their heights may be inconsistent, resulting in inconsistent impedances for each pair of electrode connectors, ultimately affecting the results of the electromagnetic interference test.

[0003] Therefore, an electromagnetic interference testing fixture with the same impedance is proposed, which is also easy to manufacture. Utility Model Content

[0004] The purpose of this invention is to provide an electromagnetic interference testing fixture with identical impedance. Multiple pairs of symmetrical assembly slots are vertically arranged on the inner wall of the cup. Metal columns can be detachably installed within these slots. An L-shaped plate at the top of each metal column provides a limiting function and ensures identical impedance. A mounting plate at the bottom of the L-shaped plate provides installation conditions for the electrode connectors. Regardless of the amount of saline solution added inside the cup, each symmetrical electrode connector of the cable under test is kept at the same height, ensuring that each pair of electrode connectors has the same impedance. This prevents contact between electrode connectors, improves the efficiency and accuracy of electromagnetic interference testing, and solves the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0006] An electromagnetic interference testing fixture with the same impedance includes a cup filled with physiological saline. The inner wall of the cup is vertically arranged with several sets of mutually symmetrical assembly slots along the central axis of the cup. The axial length of the assembly slot is consistent with the height of the cup. Each assembly slot is provided with an installation component for installing the cable under test.

[0007] Furthermore, the mounting assembly includes a metal column, an L-shaped plate located at the top of the metal column, and a mounting plate fixed to the bottom of the L-shaped plate for clamping the cable to be tested, with multiple L-shaped plates symmetrical about the central axis of the cup body.

[0008] Furthermore, any L-shaped plate has the same axial length as its symmetrical L-shaped plate, while any two asymmetrical L-shaped plates have different axial lengths.

[0009] Furthermore, the bottom end of the metal column coincides with the bottom end of the assembly groove.

[0010] Furthermore, the bottom ends of the mounting plate and the L-shaped plate are perpendicular to each other.

[0011] Furthermore, the lateral length of the L-shaped plate is greater than the thickness of the cup body.

[0012] Furthermore, the metal column, L-shaped plate, and mounting plate are formed by integral welding.

[0013] Furthermore, the cross-section of the assembly groove is arc-shaped.

[0014] Furthermore, the two electrodes of the cable under test mounted on the mounting plate at the bottom of one of the symmetrical L-shaped boards are respectively connected to a signal source or an oscilloscope.

[0015] The beneficial effects of this utility model are:

[0016] This invention features multiple pairs of symmetrical assembly slots on the inner wall of the cup, within which metal columns can be detachably installed. The L-shaped plate at the top of the metal column provides a limiting function, while the mounting plate at the bottom provides installation conditions for the electrode connectors. This ensures that the electrode connectors of each cable under test are at the same height, preventing contact between the electrode connectors and improving the efficiency and accuracy of electromagnetic interference testing. Attached Figure Description

[0017] Figure 1 This is a top view of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the installation components and assembly slots of this utility model during assembly.

[0020] Reference numerals: 1-Cup body, 2-Assembly slot, 3-Mounting component, 30-Metal column, 31-L-shaped plate, 32-Mounting plate. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0022] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0024] An embodiment of this utility model is an electromagnetic interference testing fixture with the same impedance, including a cup body 1 filled with physiological saline. Several sets of mutually symmetrical assembly slots 2 are arranged vertically along the central axis of the cup body 1 on the inner wall of the cup body 1. The axial length of the assembly slot 2 is consistent with the height of the cup body 1. Each assembly slot 2 is provided with an installation component 3 for installing the cable under test.

[0025] Reference Figures 1 to 3 The technical concept of this utility model is to provide multiple pairs of symmetrical assembly grooves 2 on the inner wall of the cup body 1 for electromagnetic interference testing, so that the axial length of the assembly grooves 2 is consistent with the height of the cup body 1. Then, an installation component 3 is assembled inside the assembly grooves 2. The installation component 3 clamps the two electrode connectors of the same cable under test to the outside of the installation component 3. That is, part of the installation component 3 is located inside the cup body 1 and part is located outside the cup body 1. The electrode connectors are clamped to the installation component 3 located outside the cup body 1, so that the two electrode connectors are at the same height. This ensures that the same pair of cables under test have the same impedance. This reduces the risk of randomly throwing all the electrode connectors of the cables under test into the water during the test, which would result in inconsistent impedance between each pair of connectors. It also avoids contact with other electrode connectors, which could cause short circuits and affect the test results during electromagnetic interference testing.

[0026] To facilitate the clamping of the electrode connectors of the cable under test and subsequent testing using the mounting assembly 3, the mounting assembly 3 includes a metal post 30, an L-shaped plate 31 located at the top of the metal post 30, and a mounting plate 32 fixed to the bottom of the L-shaped plate 31 for clamping the cable under test. Multiple L-shaped plates 31 are symmetrical about the central axis of the cup body 1. Each L-shaped plate 31 has the same axial length as its symmetrical counterpart, while any two asymmetrical L-shaped plates 31 have different axial lengths.

[0027] The number of mounting components 3 is the same as the number of mounting slots 2. The heights of the L-shaped plates 31 in the symmetrical mounting components 3 are consistent, thus ensuring that the electrode connectors of the same cable under test are at the same impedance. On one side of the symmetry line, the axial lengths of the multiple asymmetrical L-shaped plates 31 are all different. The differentiated axial length here refers to the axial lengths of the multiple L-shaped plates 31 on one side of the symmetry line increasing or decreasing sequentially, or the adjacent axial lengths being staggered. The specific setting method is selected according to actual needs to ensure that the axial lengths of each L-shaped plate 31 on the same side of the symmetry line are different.

[0028] Furthermore, it is ensured that no matter how much water is added inside the cup body 1, it will not affect the symmetrical electrode connectors of each cable under test being at the same height, and the bottom end of the metal column 30 coincides with the bottom end of the assembly groove 2. The length of the metal column 30 is adapted to the length of the assembly groove 2, ensuring that after water is added, multiple metal columns 30 are at the same level inside the cup body 1, and the axial length of the external L-shaped plate 31 ensures that the impedance of each pair of electrode connectors is the same.

[0029] In some preferred embodiments, the mounting plate 32 is perpendicular to the bottom end of the L-shaped plate 31. The mounting plate 32 provides a clamping position for the electrode clamp of each cable under test, preventing loosening during testing. The vertical mounting plate 32 ensures that electrode connectors of the same pair are on the same horizontal line, ensuring the same impedance and improving the accuracy of the test results.

[0030] Furthermore, the lateral length of the L-shaped plate 31 is greater than the thickness of the cup body 1. Here, the lateral length of the L-shaped plate 31 is the length of the horizontal portion, which allows the horizontal portion of the L-shaped plate 31 to contact the surface of the cup body 1, better limiting the position of the vertical portion of the L-shaped plate 31 and the metal column 30 on both sides of the body, while also facilitating assembly and disassembly.

[0031] The metal column 30, L-shaped plate 31, and mounting plate 32 are formed by integral welding. Integral welding ensures that the metal column 30 and mounting plate 32 at both ends of the L-shaped plate 31 are securely installed, facilitating processing without the need for secondary processing and reducing tooling processing costs.

[0032] In order to accommodate the assembly of the metal column 30, the cross-section of the assembly groove 2 is arc-shaped, and the arc shape of the metal column 30 is also arc-shaped, so that the metal column 30 can be clamped into the inner wall of the assembly groove 2 for secure installation.

[0033] Specifically, the two electrodes of the cable under test mounted on the mounting plate 32 at the bottom of one of the symmetrical L-shaped plates 31 are respectively connected to a signal source or an oscilloscope. The number of assembly slots 2 and their corresponding metal pillars 30 in this application can be set according to actual conditions to ensure that multiple cables under test are tested, while each cable under test does not come into contact during testing; one pair can be connected to a signal source or an oscilloscope to achieve both signal acquisition and stimulation modes. When acquiring a signal, one cable under test is connected to the signal source, and the remaining cables are connected to the cable of the device under test; when in stimulation mode, one cable under test is connected to the oscilloscope.

[0034] The working principle of this utility model is as follows: An assembly groove 2 is vertically set inside a cup body 1 containing physiological saline, and a metal column 30 is set inside the assembly groove 2. The horizontal part of the L-shaped plate 31 set at the top of the metal column 30 is locked to the top of the cup body 1 for limiting. At the same time, the mounting plate 32 set at the bottom of the vertical part of the L-shaped plate 31 provides installation conditions for the electrode connector of the cable under test. By ensuring that the axial lengths of the relatively symmetrical L-shaped plates 31 are consistent and the axial lengths of the asymmetrical L-shaped plates 31 are inconsistent, it is ensured that the electrode connectors of each cable under test are at the same height and do not come into contact. No matter how much physiological saline is added inside the cup body 1, each pair of electrode connectors has the same impedance and avoids short circuits, thereby improving testing efficiency and accuracy.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An electromagnetic interference testing fixture with identical impedance, characterized in that, The cup (1) is filled with saline solution. Several sets of symmetrical assembly slots (2) are arranged vertically along the central axis of the cup (1) on the inner wall of the cup (1). The axial length of the assembly slots (2) is consistent with the height of the cup (1). Each assembly slot (2) is provided with an installation component (3) for installing the cable to be tested.

2. The electromagnetic interference testing fixture with the same impedance according to claim 1, characterized in that, The mounting assembly (3) includes a metal column (30), an L-shaped plate (31) located at the top of the metal column (30), and a mounting plate (32) fixed to the bottom of the L-shaped plate (31) for clamping the cable to be tested. The multiple L-shaped plates (31) are symmetrical about the central axis of the cup body (1).

3. The electromagnetic interference testing fixture with the same impedance according to claim 2, characterized in that, Any L-shaped plate (31) has the same axial length as its symmetrical L-shaped plate (31), and any two asymmetrical L-shaped plates (31) have different axial lengths.

4. The electromagnetic interference testing fixture with the same impedance according to claim 2, characterized in that, The bottom end of the metal column (30) coincides with the bottom end of the assembly groove (2).

5. The electromagnetic interference testing fixture with the same impedance according to claim 2, characterized in that, The mounting plate (32) and the bottom of the L-shaped plate (31) are perpendicular to each other.

6. The electromagnetic interference testing fixture with the same impedance according to claim 2, characterized in that, The lateral length of the L-shaped plate (31) is greater than the thickness of the cup body (1).

7. The electromagnetic interference testing fixture with the same impedance according to claim 2, characterized in that, The metal column (30), L-shaped plate (31), and mounting plate (32) are formed by integral welding.

8. The electromagnetic interference testing fixture with the same impedance according to claim 2, characterized in that, The cross-section of the assembly groove (2) is arc-shaped.

9. The electromagnetic interference testing fixture with the same impedance according to claim 2, characterized in that, The two electrodes of the cable under test mounted on the mounting plate (32) at the bottom of one of the symmetrical L-shaped plates (31) are respectively connected to the signal source or oscilloscope.

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