CN218976341U

CN218976341U - Electromagnetic pulse protector

Info

Publication number: CN218976341U
Application number: CN202223602870.5U
Authority: CN
Inventors: 熊瑞君
Original assignee: Chongqing Daji Electronic Technology Co ltd
Current assignee: Chongqing Daji Electronic Technology Co ltd
Priority date: 2022-12-31
Filing date: 2022-12-31
Publication date: 2023-05-05
Anticipated expiration: 2032-12-31

Abstract

The utility model provides an electromagnetic pulse protector. The utility model adopts the energy domain protection unit and the frequency domain protection unit to be connected in series in the protector shell, and solves the problems that the high-frequency strong electromagnetic pulse energy and the radio frequency interference in the small part remained after the electromagnetic pulse protection in the prior art can not be filtered, and the adverse effect is generated on equipment or a filter device is additionally required to be added to consume the volume. The electromagnetic pulse protection device can solve the problems of strong electromagnetic pulse protection and electromagnetic compatibility at the same time, replaces the combination of electromagnetic pulse protection products and filtering products, and has the effect of smaller volume.

Description

Electromagnetic pulse protector

Technical Field

The utility model relates to the technical field of electromagnetic pulse protection, in particular to an electromagnetic pulse protector.

Background

Electromagnetic pulse weapons are a type of strong electromagnetic pulse in modern military that is generated by nuclear explosions or other methods to destroy an incoming missile or to destroy electronics in radar, communications, and weapons systems. The electronic components such as a transistor, an integrated circuit, a resistor, a capacitor, a filter, a relay, a particle wave device and the like can be damaged; the electromagnetic pulse energy can be coupled with cables, wires, antennas and the like to transfer electromagnetic pulse energy to electronic equipment, so that failure or damage of the electronic equipment, tripping of a circuit switch and flip-flop can demagnetize or distort a memory (magnetic core, magnetic drum, magnetic tape and the like) working according to magnetic flux, destroy components or erase stored information, and cause closing, transfer false signals and the like.

The utility model patent of 202220868185.8 discloses an electromagnetic pulse protector with double signal wires in the prior art, which comprises a primary protection unit module and a secondary protection unit module which are connected through a protection circuit, wherein the primary protection unit module and the secondary protection unit module are arranged along the input end to the output end of the protection circuit, an inductance element is connected in series on the protection circuit between the primary protection unit module and the secondary protection unit module, and the primary protection unit module is used for primary protection of the circuit to isolate energy and guide the energy to be grounded; the secondary protection unit module is used for clamping leakage current and voltage to be within a range which can be born by equipment; the inductance element decouples the various voltage limiting elements and limits the discharge current through the secondary protection unit module. Also included is a guard housing that houses the primary and secondary protection unit modules. The guard housing is mounted in a feed-through manner.

However, in this structure, only the electromagnetic pulse protection circuit can only filter most of the middle-low frequency strong electromagnetic pulse energy, but the rest of the middle-high frequency strong electromagnetic pulse energy and the radio frequency interference cannot be filtered, so that adverse effects are generated on the equipment or the total volume of the device is increased when a filtering device is additionally arranged.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides an electromagnetic pulse protector, which solves the problems that the energy of a small part of medium-high frequency strong electromagnetic pulse and the radio frequency interference remained after the electromagnetic pulse is protected in the prior art cannot be filtered out, thereby causing adverse effect on equipment or needing to additionally add a filter device to consume volume.

According to an embodiment of the present utility model, an electromagnetic pulse protector includes a protector housing accommodating an energy domain protecting unit and a frequency domain filtering unit; the protector shell comprises an input end and an output end, wherein the input end is provided with a pair of input connecting terminals for connecting protection equipment, and the output end is provided with a pair of output connecting terminals for connecting lines; the energy domain protection unit and the frequency domain filtering unit are arranged from the input end to the output end and are connected in series; the energy domain protection unit is used for carrying out electromagnetic pulse protection on the protection equipment and filtering out most of medium-low frequency strong electromagnetic pulse energy, and the frequency domain filtering unit is used for carrying out filtering treatment on the rest small part of medium-high frequency strong electromagnetic pulse energy and radio frequency interference.

Optionally, the energy domain protection unit comprises a first-level protection unit and a second-level protection unit, wherein the first-level protection unit and the second-level protection unit are arranged from an input end to an output end and are connected in series, and an inductance element is connected in the middle; the first-stage protection unit is used for isolating electromagnetic pulse energy and guiding the electromagnetic pulse energy to be grounded, the second-stage protection unit is used for clamping current and voltage leaked by the first-stage protection unit to be within a bearable range of equipment, and the inductance element is used for decoupling the first-stage protection unit and limiting leakage current passing through the second-stage protection unit.

Optionally, the frequency domain protection unit includes a penetration capacitor, a grounding plate and a filtering module, and the signal after electromagnetic pulse protection by the energy domain protection unit is connected to the grounding plate after high-frequency filtering by the penetration capacitor and is led out to the filtering module for filtering and then output.

Optionally, the guard housing is a threaded tubular structure.

Optionally, the guard housing is mounted in a feed-through configuration, such that the input and output ends are completely isolated.

Optionally, the guard housing shell is provided with a double nickel plating.

Optionally, the input end and the output end of the protector shell are of a fully sealed design filled with epoxy resin.

The technical principle of the utility model is as follows: in a protector housing provided with a pair of input connection terminals for connection of protection equipment and a pair of output connection terminals for connection of lines, an energy domain protection unit and a frequency domain filtering unit are arranged from the protector input end to the protector output end and are connected in series.

Compared with the prior art, the utility model has the following beneficial effects: by adopting the technical problems that the energy domain protection unit and the frequency domain protection unit are placed in the protector shell in series, the energy domain protection unit and the frequency domain protection unit solve the technical problems that the energy of the high-frequency strong electromagnetic pulse and the radio frequency interference in a small part remained after the electromagnetic pulse protection in the prior art cannot be filtered, thereby generating adverse effects on equipment or needing to additionally add a filtering device to consume the volume, and the technical effects of simultaneously solving the strong electromagnetic pulse protection and the electromagnetic compatibility and having smaller device volume are generated.

Drawings

FIG. 1 is an assembly view of an embodiment of the guard housing of the present utility model;

fig. 2 is a circuit diagram of another embodiment of the present utility model.

In the above figures: 1. a ground plate module; 2. cross groove countersunk head screw; 3. a guard housing; 100. an energy domain protection unit; 200. a frequency domain protection unit; 101. a first-stage protection unit; 102. and a secondary protection unit.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

As shown in fig. 1, an embodiment of the present utility model proposes an electromagnetic pulse protector, which includes a ground plate module 1, a cross-slot countersunk head screw 2, and a protector housing 3. The detailed working process of this embodiment is that the circuit module before the ground plate module 1 belongs to an energy domain protection unit, the ground plate module 1 and the following circuits belong to a frequency domain protection unit, the input connection terminal of the protection device is connected with a pair of input connection terminals of the protector housing 3, after electromagnetic pulse protection is performed on the input connection terminals through the energy domain protection unit, most of middle-low frequency strong electromagnetic pulse energy is filtered, and then the rest of middle-high frequency strong electromagnetic pulse energy and radio frequency interference are filtered through the frequency domain protection unit. Because the electromagnetic pulse protector combines the energy domain protection technology and the frequency domain filtering technology, the filter can be ensured to have lower residual energy. And the problems of strong electromagnetic pulse protection and electromagnetic compatibility can be solved simultaneously, and the combination of an electromagnetic pulse protection product and a filtering product is replaced, so that the electromagnetic pulse protection device has smaller volume.

Optionally, the guard housing is a threaded tubular structure. Therefore, the protector shell can be arranged on the shielding partition plate to form a feed-through structure, and the problems of secondary coupling after protection and filtration can be effectively isolated.

Optionally, the guard housing is mounted in a feed-through configuration, with the input and output ends completely isolated. Therefore, the protector has minimum grounding path and impedance, can ensure that the protector has excellent medium-high frequency protection and filtering performance, and effectively protects electromagnetic pulse and radio frequency interference.

Optionally, the guard housing shell is provided with a double nickel plating. Therefore, the shielding effect and the protection effect can be improved by adopting the double-layer nickel plating layer, and the anti-abrasion and anti-aging coating is wear-resistant.

Optionally, the input and output ends of the guard housing are of a fully sealed design with epoxy potting. Thus, the front end and the rear end of the shell adopt the fully-sealed design of epoxy resin encapsulation, and the shell can be suitable for severe environments.

As shown in fig. 2, according to another embodiment of the present utility model, the energy domain protection unit 100 and the frequency domain protection unit 200 are included, wherein the energy domain protection unit includes a primary protection unit 101 and a secondary protection unit 102, and the primary protection unit and the secondary protection unit are arranged from an input end to an output end and are connected in series, and inductance elements L1 and L2 are connected in the middle. The primary protection unit 101 includes piezoresistors RV1 and RV2 and fuses F1 and F2 for isolating and guiding electromagnetic pulse energy to ground, and the secondary protection unit 102 includes transient suppression diodes D1, D2 and D3 for clamping the current and voltage of the primary protection unit leakage to within the device's affordable range, and inductive elements L1 and L2 are used to decouple the primary protection unit 101 and limit leakage current through the secondary protection unit 102. The frequency domain protection unit 200 includes through capacitors C1 and C2, a ground plate and a filtering module, and the signals after electromagnetic pulse protection by the energy domain protection unit 100 are connected to the ground plate after high-frequency filtering by the through capacitors C1 and C2 and led out to the filtering module for filtering and then output.

Due to the adoption of a multistage transient electromagnetic protection technology and a filtering technology, the electromagnetic pulse electromagnetic shielding device has excellent electromagnetic pulse (nuclear electromagnetic pulse, thunder, static electricity and the like) shielding performance and electromagnetic interference filtering performance, can ensure that a product meets the requirements of the standards of the technical requirements and the test methods of the electromagnetic pulse shielding device at the electric inlet end of GJB 9408-2018, and finally ensures that a weapon system meets the requirements and the measurements of electromagnetic emission and sensitivity of military equipment and subsystems of GJB151B-2013 and the requirements of the electromagnetic pulse shielding of the standards of the system of GJB 1389A-2005 electromagnetic compatibility. In some embodiments, the electromagnetic pulse protector adopts a multi-stage transient protection technology, and performs parameter matching aiming at the characteristics of various electromagnetic pulses, so that various electromagnetic pulse interferences including nuclear electromagnetic pulses, electromagnetic pulse bombs, lightning electromagnetic pulses, static electricity, switching transients and the like can be prevented. In the embodiment of the utility model, the electromagnetic pulse protector mainly performs electromagnetic pulse protection on a power line.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims

1. An electromagnetic pulse protector characterized by comprising a protector housing accommodating an energy domain protection unit and a frequency domain filtering unit; the protector shell comprises an input end and an output end, wherein the input end is provided with a pair of input connecting terminals for connecting protection equipment, and the output end is provided with a pair of output connecting terminals for connecting lines; the energy domain protection unit and the frequency domain filtering unit are arranged from the input end to the output end and are connected in series; the energy domain protection unit is used for carrying out electromagnetic pulse protection on the protection equipment and filtering out most of medium-low frequency strong electromagnetic pulse energy, and the frequency domain filtering unit is used for carrying out filtering treatment on the rest small part of medium-high frequency strong electromagnetic pulse energy and radio frequency interference.

2. The electromagnetic pulse protector as set forth in claim 1, wherein the energy domain protecting unit comprises a primary protecting unit and a secondary protecting unit, the primary protecting unit and the secondary protecting unit are arranged in series from an input end to an output end, and an inductance element is connected in the middle;

the first-stage protection unit is used for isolating electromagnetic pulse energy and guiding the electromagnetic pulse energy to be grounded, the second-stage protection unit is used for clamping current and voltage leaked by the first-stage protection unit to be within a bearable range of equipment, and the inductance element is used for decoupling the first-stage protection unit and limiting leakage current passing through the second-stage protection unit.

3. The electromagnetic pulse protector as set forth in claim 1, wherein the frequency domain filtering unit comprises a feedthrough capacitor, a ground plate and a filtering module, and the signal after electromagnetic pulse protection by the energy domain protecting unit is connected to the ground plate after high-frequency filtering by the feedthrough capacitor and is led out to the filtering module for filtering and then output.

4. An electromagnetic pulse protector as defined in claim 1, wherein said protector housing is of threaded tubular construction.

5. An electromagnetic pulse protector as defined in claim 1, wherein said protector housing is mounted in a feed-through configuration to completely isolate said input end from said output end.

6. An electromagnetic pulse protector as defined in claim 1, wherein said protector housing shell has a double layer nickel plating.

7. An electromagnetic pulse protector as claimed in claim 1, wherein said protector housing input and output are of a fully sealed design with epoxy potting.