CN215728499U

CN215728499U - Anti-interference conduction coupling testing device

Info

Publication number: CN215728499U
Application number: CN202121753654.3U
Authority: CN
Inventors: 马如坡; 王群; 印杰; 王振力
Original assignee: JIANGSU POLICE INSTITUTE
Current assignee: JIANGSU POLICE INSTITUTE
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-02-01
Anticipated expiration: 2031-07-29

Abstract

The utility model discloses an anti-interference conductive coupling test device, which detects a tested cable and comprises a metal box body, a conductive coupling clamp, a matched load, a metal wire, a coaxial cable connector, a grounding end and a cable fixing component, wherein the metal box body is provided with a plurality of conductive coupling clamps; the conductive coupling clamp comprises a lower polar plate and an upper polar plate, and the lower polar plate and the upper polar plate are in a hollow cylindrical structure after being butted; the lower polar plate is connected with the matched load through a metal lead; the cable fixing component comprises a movable pressing block, a bracket component and a clamp spring; the movable pressing block is fixed on the bracket component through the clamp spring, and the cable to be tested is fixed in the conduction coupling clamp through the clamp spring. The utility model is suitable for testing the conducted interference of the cable, effectively reduces the interference to the measuring sensor, and simultaneously reduces the interference influence of the radiation source on the tested cable.

Description

Anti-interference conduction coupling testing device

Technical Field

The present invention relates to a conductive coupling test device, and more particularly, to a conductive coupling test device with interference prevention.

Background

Electromagnetic pulses, which are a transient electromagnetic phenomenon, interfere with electronic devices or systems by means of radiation coupling or conductive coupling, thereby causing the performance of the whole electronic device or system to be degraded or damaged. In order to verify the capability of an electronic device or system to resist electromagnetic pulse interference, it is necessary to perform an electromagnetic compatibility test on the electronic device or system. And respectively adopting a radiation coupling test or a conduction coupling test according to different electromagnetic pulse coupling modes. One important device often used in conductive coupling testing is a capacitive coupling clamp.

Capacitive coupling clips were used in conjunction with pulse generators to conduct conducted interference tests and experiments. During testing, if the coupling current condition on the cable is to be monitored, a sensor such as a current probe is required to output the sensing result to an oscilloscope or other measuring instruments for displaying and analyzing. The current probe is a magnetic ring designed according to the Faraday principle, during testing, transient current flowing through the lead forms a magnetic field around the lead, and the current probe converts magnetic flux changing around the lead into a voltage value to be output. In the test process, if electromagnetic radiation interference exists in the test environment, the current probe can simultaneously superimpose the changed magnetic flux caused by the interference on the original changed magnetic flux, and the accuracy of the test result is influenced.

The existing capacitive coupling clamp adopts the structural style of an upper clamp plate and a lower clamp plate, and a high-voltage pulse signal output by a pulse generator is transmitted to the upper clamp plate and the lower clamp plate, so that certain electromagnetic radiation interference can be generated in the surrounding environment. The sensitivity of the current probe is high, so that the current probe is easily influenced by a test environment, the measurement result of the current probe generates deviation, and the measurement result is even invalid when the output amplitude of the pulse generator is high. Meanwhile, if there is a radiation interference source around the capacitive coupling clamp, the test result of the cable will also be affected. Accordingly, there is a need for improvements to existing capacitive coupling clip devices.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the defects of interference on a measuring sensor and interference on a measured cable in the prior art, the utility model provides an anti-interference conduction coupling testing device.

The technical scheme is as follows: the utility model relates to an anti-interference conductive coupling test device for detecting a tested cable, which comprises a metal box body, a conductive coupling clamp, a matched load, a metal lead, a coaxial cable connector, a grounding end and a cable fixing component.

The conductive coupling clamp comprises a lower polar plate and an upper polar plate, and the lower polar plate and the upper polar plate are in a hollow cylindrical structure after being butted; the lower polar plate is connected with the matched load through a metal lead.

The cable fixing component comprises a movable pressing block, a bracket component and a clamp spring; the movable pressing block is fixed on the bracket component through the clamp spring, and the cable to be tested is fixed in the conduction coupling clamp through the clamp spring.

The lower polar plate and the upper polar plate are in semicircular structures and are butted together to form a hollow cylindrical structure.

The metal box body is provided with a hole for the tested cable to pass through.

The movable pressing block is made of an insulating material.

The utility model also includes a load connection plate to which the mating load is connected via a coaxial cable connector and a metal wire.

The metal box body comprises a main box body, a box cover, a hinge and a hasp assembly, wherein one side of the main box body is connected with one side of the box cover through the hinge, and the other side of the main box body is connected with the other side of the box cover through the hasp assembly.

The end part of the lower polar plate is provided with a fastening belt which fixes the cable to be tested.

The bracket component includes upper bracket component and lower carriage component, and the upper polar plate passes through the upper bracket component to be fixed on the case lid, and the lower polar plate passes through the lower carriage component to be fixed in the main tank.

The bracket component distributes in the metal box, and then fixes last polar plate and bottom plate.

And a coaxial cable connector is fixed on the side surface of the metal box body, and the end part of the lower polar plate is connected with the coaxial cable connector.

Has the advantages that: compared with the prior art, the utility model has the following advantages: the structure that the conductive coupling clamp is embedded in the metal shielding box body is suitable for testing the conductive interference of the cable, effectively reduces the interference on a measuring sensor, and simultaneously reduces the interference influence of a radiation source on the tested cable.

Drawings

FIG. 1 is a front view of a tamper-proof conductive coupling test device in accordance with the present invention;

FIG. 2 is a top view of the interference-proof conductive coupling test apparatus of the present invention;

FIG. 3 is a left side view of the interference-free conductive coupling test apparatus of the present invention;

FIG. 4 is a cross-sectional view of a conductive coupling clip of the interference-proof conductive coupling test apparatus of the present invention.

Detailed Description

Example (b):

as shown in fig. 1 to 3, the interference-proof conductive coupling test apparatus of the present invention includes a metal case 1, a conductive coupling clip 2, a matching load 5, a metal wire 9, a coaxial cable connector 6, a ground terminal 11, and a cable fixing member.

The metal box body 1 consists of a main box body 1-1 at the lower part and a box cover 1-2 at the upper part, one side of the metal box body 1 is fixedly connected through a hinge 12, and the other side is fixed through two buckle components 13. Two ends of the metal box body 1 are respectively dug with a round hole for passing through the cable to be tested. The whole conductive coupling test device box body is made of metal materials so as to shield.

The cable fixing component comprises a movable pressing block 3, a support component 4 and an elastic clamp spring 8, the movable pressing block 3 is fixed on the support component 4 through the elastic clamp spring 8, and the movable pressing block 3 fixes the tested cable in the conduction coupling clamp 2 through the elastic clamp spring 8. The bracket assembly 4 is made of an insulating material, and in this embodiment, the bracket assembly 4 is made of a plastic steel material. The bracket assembly 4 includes an upper bracket assembly 4-2 and a lower bracket assembly 4-1.

As shown in fig. 4, the conductive coupling clip 2 is composed of a lower plate 2-1 and an upper plate 2-2 which are symmetrical, and the upper plate and the lower plate are in a semicircular structure and are butted together to form a hollow cylindrical structure. The lower polar plate 2-1 is fixed at the center of the bottom of the main box body 1-1 through three lower bracket assemblies 4-1 which are equally spaced. One end of the lower polar plate 2-1 is connected with a coaxial cable connector 6 fixed on the main box body 1-1, and the other end of the lower polar plate 2-1 is connected with a matching load 5 fixed at the bottom of the main box body 1-1 through a metal lead 9. The upper pole plate 2-2 is fixed to the center of the case cover 1-2 by three upper bracket assemblies 4-2 at equal intervals.

In this embodiment, six movable press blocks 3 made of insulating materials are respectively arranged at the positions of the support assembly 4 on the lower polar plate 2-1 and the upper polar plate 2-2 of the conductive coupling clamp 2, and are fastened and connected through an elastic snap spring 8, and the movable press blocks 3 are matched with two fastening belts 7 at two ends of the lower polar plate 2-2 to fix a cable to be tested which passes through the box body.

One end of the elastic clamp spring 8 is fixed on the support component 4, the other end of the elastic clamp spring is fixed on the movable pressing block 3, and the movable pressing block 3 is fixed on the tested cable under the elastic action of the spring 8.

The matching load 5 is connected to a load connecting plate 10 at the bottom in the box body through a coaxial cable connector 6, and the load connecting plate 10 is connected with the main box body 1-1 through a metal lead 9. The matching load 5 is fixed in the conduction coupling box, and the size of the load is selected and replaced according to actual test requirements.

The grounding end 11 is fixed at one end of the metal box body 1 and used for being connected with a ground wire during testing, and interference to the testing is reduced.

When the utility model is used, the hasp component 13 on the metal box body 1 is opened, the matched load 5 is changed as required, then the tested cable is straightened and placed in the center of the lower polar plate 2-1 of the conduction coupling clamp 2, the two ends of the cable are fixed by the fastening belt 7 to prevent the cable from bending and deforming, the upper polar plate 2-2 of the conduction coupling clamp 2 is covered, at the moment, the movable pressing block 3 fixes the cable under the action of the elastic snap spring 8, so that the cable is positioned in the center of the conduction coupling clamp 2, and finally the hasp component 13 is fixed. Because one end of the movable pressing block 3 is connected with the elastic clamp spring 8 and is regulated and controlled by the elastic clamp spring 8, the size of the central space of the conduction coupling clamp 2 can be enlarged or reduced, and cables to be tested with different wire diameters are all positioned at the central position of the conduction coupling clamp 2 to fix the cables.

Claims

1. An interference-proof conductive coupling test device, characterized in that: the anti-interference conduction coupling test device detects the tested cable; the conductive coupling test device comprises a metal box body (1), a conductive coupling clamp (2), a matched load (5), a metal lead (9), a coaxial cable connector (6), a grounding end (11) and a cable fixing assembly;

the conductive coupling clamp (2) comprises a lower polar plate (2-1) and an upper polar plate (2-2), and the lower polar plate and the upper polar plate are in a hollow cylindrical structure after being butted; the lower polar plate (2-1) is connected with a matched load (5) through a metal lead (9);

the cable fixing component comprises a movable pressing block (3), a bracket component (4) and a clamp spring (8); the movable pressing block (3) is fixed on the support component (4) through the clamp spring (8), and the movable pressing block (3) is used for fixing the tested cable in the conduction coupling clamp (2) through the clamp spring (8).

2. The tamper-proof conductive coupling test device of claim 1, wherein: the lower polar plate (2-1) and the upper polar plate (2-2) are of semicircular structures.

3. The tamper-proof conductive coupling test device of claim 1, wherein: the metal box body (1) is provided with a hole for the tested cable to pass through.

4. The tamper-proof conductive coupling test device of claim 1, wherein: the movable pressing block (3) is made of an insulating material.

5. The tamper-proof conductive coupling test device of claim 1, wherein: and the matching load (5) is connected to the load connecting plate (10) through the coaxial cable connector (6) and the metal lead (9).

6. The tamper-proof conductive coupling test device of claim 1, wherein: the metal box body (1) comprises a main box body (1-1), a box cover (1-2), a hinge (12) and a buckle component (13), wherein one side of the main box body (1-1) is connected with one side of the box cover (1-2) through the hinge (12), and the other side of the main box body (1-1) is connected with the other side of the box cover (1-2) through the buckle component (13).

7. The tamper-proof conductive coupling test device of claim 1, wherein: and a fastening belt (7) is arranged at the end part of the lower polar plate (2-1), and the fastening belt (7) is used for fixing the cable to be tested.

8. The tamper-proof conductive coupling testing device of claim 6, wherein: the support assembly (4) comprises an upper support assembly (4-2) and a lower support assembly (4-1), the upper pole plate is fixed on the box cover (1-2) through the upper support assembly (4-2), and the lower pole plate (2-1) is fixed in the main box body (1-1) through the lower support assembly (4-1).

9. The tamper-proof conductive coupling test device of claim 1, wherein: the bracket components (4) are distributed in the metal box body (1).

10. The tamper-proof conductive coupling test device of claim 1, wherein: a coaxial cable connector (6) is fixed on the side surface of the metal box body (1), and the end part of the lower polar plate (2-1) is connected with the coaxial cable connector (6).