CN215641429U - Anti-electromagnetic interference experimental device - Google Patents
Anti-electromagnetic interference experimental device Download PDFInfo
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- CN215641429U CN215641429U CN202121660218.1U CN202121660218U CN215641429U CN 215641429 U CN215641429 U CN 215641429U CN 202121660218 U CN202121660218 U CN 202121660218U CN 215641429 U CN215641429 U CN 215641429U
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Abstract
The utility model relates to the technical field of shielding electromagnetic interference, and discloses an anti-electromagnetic interference experimental device which comprises a test bed and a hollow conductive box body, wherein the test bed is placed in the box body, a temperature measuring unit for measuring the temperature of a test sample is arranged on the test bed, the box body is connected with a first conducting wire for grounding, an wave absorbing structure is arranged on the inner side surface of the box body, a filter circuit box for being electrically connected with the test sample is arranged in the box body, an input and output connector lug is arranged on the box body, and the input and output connector lug is electrically connected with the filter circuit box. The experimental device can shield interference signals, protect personal safety, and is portable, reliable and convenient to use.
Description
Technical Field
The utility model relates to the technical field of electromagnetic interference shielding, in particular to an anti-electromagnetic interference experimental device.
Background
For devices applied to substations, rail transit, high-power supplies and the like under severe electromagnetic environments, the conventional test method mostly uses common copper wires or common twisted pairs as transmission lines; and fixing the device to be tested by using a simple clamp, and testing or debugging under the conditions of an open room. Under the prior art, the test sample is easily interfered by electromagnetic energy generated by the surrounding environment, and the electromagnetic energy generated by the test sample can cause more or less damage to the human body during the test process.
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is: an experimental device capable of shielding electromagnetic interference is designed, and is suitable for debugging and testing small modules and devices.
In order to achieve the purpose, the utility model provides an anti-electromagnetic interference experimental device which comprises a test bed and a hollow conductive box body, wherein the test bed is placed in the box body, a temperature measuring unit for measuring the temperature of a test sample is arranged on the test bed, the box body is connected with a first conducting wire for grounding, a wave absorbing structure is arranged on the inner side surface of the box body, a filter circuit box is arranged in the box body, an input and output connector lug is installed on the box body, and the input and output connector lug is electrically connected with the filter circuit box.
Preferably, the test bed is a conductive test bed.
Preferably, the box body is made of cold rolled steel.
As an optimized scheme, the box body is provided with a placing opening, the box body is connected with a shielding door used for opening and closing the placing opening, a temperature monitoring display screen is arranged on the shielding door, and the temperature measuring unit is electrically connected with the temperature monitoring display screen.
As a preferred scheme, the temperature measuring unit comprises a plurality of thermocouples which are uniformly distributed on the test bed.
Preferably, the temperature measuring unit is electrically connected with the temperature monitoring display screen through a second wire, and the second wire is arranged close to the inner side face of the box body.
Preferably, the upper surface of the test bed is provided with a mounting hole, and the temperature measuring unit is arranged in the mounting hole and exposes a test end for contacting with a test sample.
Preferably, the shield door is provided with a switch handle for locking or unlocking the shield door and the box body.
As a preferred scheme, the wave-absorbing structure is detachably connected with the box body.
Preferably, at least two filter circuit boxes which are arranged oppositely are arranged in the box body, and the filter circuit boxes are arranged on the inner side surface of the box body.
Compared with the prior art, the embodiment of the utility model has the beneficial effects that:
according to the experimental device for resisting electromagnetic interference, disclosed by the embodiment of the utility model, the influence of external electromagnetic wave energy on a testing process is shielded by the conductive box body, and the electromagnetic wave energy generated by a test sample in the testing process can be prevented from radiating outside the box body by arranging the wave-absorbing structure on the inner side surface of the box body, so that the damage to a tester is caused; a filter circuit box is arranged in the box body, an input/output connector lug is arranged on the box body, and the input/output connector lug is electrically connected with a test sample through the filter circuit box, so that the conducted interference can be reduced; the test bed is provided with a temperature measuring unit for measuring the temperature of a test sample, and the test sample or the module can be directly contacted with the temperature measuring unit when being placed on the test bed for debugging and testing, so that the interference is reduced; all interference and leakage of the box body are gathered to the ground through the first lead wire. In addition, the anti-electromagnetic interference test device provided by the utility model is portable, reliable and convenient to use.
Drawings
FIG. 1 is a schematic view of the external structure of a case according to an embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of the case according to the embodiment of the present invention;
FIG. 3 is a layout view of a temperature measuring unit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a feedthrough filter of an embodiment of the present invention.
In the figure:
1. a box body; 2. a test bed; 21. a conductive plate; 22. an insulating support frame; 3. a filter circuit box; 4. an input/output connector lug; 5. a temperature measuring unit; 6. a first conductive line; 7. a shield door; 8. a temperature monitoring display screen; 9. a switch handle; 10. the samples were tested.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "inner", "outer", etc., used in the present invention are used to indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 3, an anti-electromagnetic interference experimental apparatus according to a preferred embodiment of the present invention includes a test bed 2 and a hollow conductive box 1, the test bed 2 is placed in the box 1, a temperature measuring unit 5 for measuring a temperature of a test sample 10 is disposed on the test bed 2, the box 1 is connected to a first conducting wire 6 for grounding, a wave absorbing structure (not shown in the figure) is disposed on an inner side surface of the box 1, a filter circuit box 3 is disposed in the box 1, an input/output connector 4 is mounted on the box 1, and the input/output connector 4 is electrically connected to the filter circuit box 3.
According to the anti-electromagnetic interference experimental device, the conductive box body 1 is used for shielding the influence of external electromagnetic wave energy on the testing process, and the wave-absorbing structure is arranged on the inner side surface of the box body 1 and can prevent the electromagnetic wave energy generated by the test sample 10 in the testing process from radiating outside the box body 1 to cause damage to testers; a filter circuit box 3 is arranged in the box body 1, an input/output connector lug 4 is arranged on the box body 1, and the input/output connector lug 4 is electrically connected with a test sample 10 through the filter circuit box 3, so that the conducted interference can be reduced; the test bed 2 is provided with a temperature measuring unit 5 for measuring the temperature of the test sample 10, and when debugging and testing are carried out, the test sample 10 or a module is placed on the test bed 2 and can be directly contacted with the temperature measuring unit 5, so that interference is reduced; all disturbances and leakage from the tank 1 are summed to earth ground by grounding through the first conductor 6. In addition, the anti-electromagnetic interference test device provided by the utility model is portable, reliable and convenient to use.
Specifically, as shown in fig. 2 and 4, at least two filter circuit boxes 3 are disposed in the box 1, and the filter circuit boxes 3 are mounted on an inner side surface of the box 1. Specifically, the number of the filter circuit boxes 3 in this embodiment is two, and the two filter circuit boxes 3 are respectively installed on the left side and the right side of the box body 1 in the opposite arrangement. In addition, the wave-absorbing structure of this embodiment has the conical body that a plurality of compound wave-absorbing material formed, and a plurality of conical bodies are fixed at the medial surface of box 1 with certain interval, and filter circuit box 3 is feed-through filter, and filter circuit box 3's connector lug and input/output connector lug 4 are the banana head, have better electrical apparatus performance, and the wiring is convenient, and is with low costs.
In addition, the anti-electromagnetic interference experimental device of this embodiment is small in size, as the test unit of small-size test sample 10 or module, it is more portable, in addition, filter circuit box 3 in this embodiment is installed respectively on the left side and the right side of box 1, it is corresponding, the input/output joint 4 that is connected with filter circuit box 3 sets up and connects filter circuit box 3 and external circuit in the left and right sides of box 1, therefore, to complicated module test, can be through about box 1 arbitrary stack connection and extension experimental device unit, thereby adapt to the experiment of different types of module.
Further, the test bed 2 is a conductive test bed, electromagnetic interference is guided into the box body 1 along the test bed 2, static electricity is guided into the ground by placing the box body 1 on the ground and grounding the first lead 6, and therefore the electromagnetic interference generated by the static electricity is prevented. Specifically, the test stand 2 may be a metal test stand. In addition, in other embodiments, the test bed 2 includes an insulating support frame 22 and a conductive plate 21, the conductive plate 21 is disposed on the insulating support frame 22, and the conductive plate 21 is electrically connected to the box 1 through a third wire. The conductive plate 21 is a steel plate, the third lead is beryllium copper, and the conductive plate 21 is connected with the bottom of the box body 1 along the insulating support frame 22 through the third lead.
Further, the case 1 is made of a cold-rolled steel sheet. Specifically, the wire resistance of the box body 1 conducting the ground is smaller than 1 ohm, the steel plate at the bottom of the box body 1 can be directly grounded to prevent electric leakage, the back surface of the box body is grounded through the first wire 6, all interference and the electric leakage of the box body 1 are gathered to the ground, the requirement that the resistance is smaller than 1 ohm can be met, and personal safety can be protected.
Further, box 1 has been seted up and has been placed the opening, and box 1 is connected with and is used for the switch to place open-ended shield door 7, is equipped with temperature monitoring display screen 8 on the shield door 7 and is used for locking or unlocking the switch handle 9 that shields door 7 and box 1, and temperature measurement unit 5 is connected with temperature monitoring display screen 8 electricity. Specifically, temperature measuring unit 5 includes 3 thermocouples, and 3 mounting holes have been seted up to the upper surface of test bench 2, and the thermocouple is located in the mounting hole and is exposed and be used for the test end with test sample 10 contact, and the spaced distance between two liang is 1/4 of test bench 2's length. The temperature measuring unit 5 is electrically connected with the temperature monitoring display screen 8 through a second lead along the gap between the wave absorbing structures on the bottom surfaces of the test bed 2 and the box body 1 and the joint of the opening and the shielding door 7. The wiring mode of the temperature measuring unit 5 and the temperature monitoring display screen 8 can prevent other interferences caused by disordered wiring and difficulty in failure analysis work, so that the problem that test parameters are not credible is caused. Specifically, the switch handle 9 in this embodiment is a horizontal lock return pressure type handle.
Furthermore, the wave-absorbing structure is detachably connected with the box body 1. Specifically, the wave-absorbing structure at the bottom of the box body 1 can be detached, the test bed 2 can be selected according to the requirements of the test sample 10, and the position of the wave-absorbing structure at the bottom surface of the box body 1 is adjusted so as to stably place the test bed 2 and realize ground guiding by contacting with the box body 1.
In summary, the embodiment of the utility model provides an anti-electromagnetic interference experimental device, which shields the influence of external electromagnetic wave energy on the testing process through a conductive box body, and can prevent the electromagnetic wave energy generated by a test sample in the testing process from radiating outside the box body to cause damage to testers through a wave-absorbing structure arranged on the inner side surface of the box body; the left inner side and the right inner side of the box body are provided with filter circuit boxes, the left outer side and the right outer side of the box body are provided with input and output connector terminals, and the input and output connector terminals are electrically connected with a test sample through the filter circuit boxes, so that the conduction interference can be reduced; the test bed is provided with a temperature measuring unit for measuring the temperature of a test sample, the temperature measuring unit is connected with the temperature monitoring display screen through a second lead, and the test sample or the module can be directly contacted with the thermocouple when being placed on the test bed for debugging and testing, so that the interference is reduced; the test bed is a conductive test bed and is used for preventing electromagnetic interference such as static electricity. The wiring mode of the temperature measuring unit and the temperature monitoring display screen and other wiring modes of the box body cannot cause other interference through reasonable arrangement, failure analysis is facilitated, and the device is portable, reliable and convenient to use.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an anti-electromagnetic interference's experimental apparatus which characterized in that: including test bench and hollow electrically conductive box, the test bench place in the box, just be equipped with the temperature measurement unit that is used for measuring the test sample temperature on the test bench, the box is connected with the first wire that is used for ground connection, the medial surface of box is equipped with absorbing structure, be equipped with the filter circuit box that is used for being connected with the test sample electricity in the box, the input/output connector lug is installed to the box, the input/output connector lug with the filter circuit box electricity is connected.
2. The experimental apparatus for resisting electromagnetic interference of claim 1, wherein: the test bed is a conductive test bed.
3. The experimental apparatus for resisting electromagnetic interference of claim 1, wherein: the box body is made of cold rolled steel.
4. The experimental apparatus for resisting electromagnetic interference of claim 1, wherein: the box body is provided with a placing opening, the box body is connected with a shielding door used for opening and closing, a temperature monitoring display screen is arranged on the shielding door, and the temperature measuring unit is electrically connected with the temperature monitoring display screen.
5. The experimental apparatus for resisting electromagnetic interference of claim 4, wherein: the temperature measuring unit comprises a plurality of thermocouples which are uniformly distributed on the test bed.
6. The anti-electromagnetic interference experimental apparatus according to claim 4 or 5, wherein: the temperature measuring unit is electrically connected with the temperature monitoring display screen through a second wire, and the second wire is tightly attached to the inner side face of the box body.
7. The anti-electromagnetic interference experimental apparatus according to claim 1, 4 or 5, wherein: the upper surface of the test bed is provided with a mounting hole, and the temperature measuring unit is arranged in the mounting hole and exposes a testing end for contacting with a test sample.
8. The experimental apparatus for resisting electromagnetic interference of claim 4, wherein: the shielding door is provided with a switch handle used for locking or unlocking the shielding door and the box body.
9. The experimental apparatus for resisting electromagnetic interference of claim 1, wherein: the wave-absorbing structure is detachably connected with the box body.
10. The experimental apparatus for resisting electromagnetic interference of claim 1, wherein: at least two opposite filter circuit boxes are arranged in the box body, and the filter circuit boxes are arranged on the inner side surface of the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121660218.1U CN215641429U (en) | 2021-07-20 | 2021-07-20 | Anti-electromagnetic interference experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121660218.1U CN215641429U (en) | 2021-07-20 | 2021-07-20 | Anti-electromagnetic interference experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215641429U true CN215641429U (en) | 2022-01-25 |
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ID=79891228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121660218.1U Active CN215641429U (en) | 2021-07-20 | 2021-07-20 | Anti-electromagnetic interference experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215641429U (en) |
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2021
- 2021-07-20 CN CN202121660218.1U patent/CN215641429U/en active Active
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