Electrostatic protection electromagnetic shielding test platform based on microgravity environment

Abstract

The invention discloses an electrostatic protection electromagnetic shielding test platform based on a microgravity environment, and the platform comprises a shielding box body which is internally provided with an electrostatic discharge generator, and the side wall of the shielding box body is provided with a test window and a waveguide window; wherein the shielding effectiveness and electrostatic discharge parameter test is performed on the test material sample through the test window, the shielding box body can be placed in a microgravity environment formed by the falling tower to perform a test experiment, and the signal acquisition processing of the electrostatic protection electromagnetic shielding test is performed on the test material sample through the waveguide window. By adopting the technical scheme of the invention, not only can the tower falling experiment microgravity environment be adapted, but also test conditions with certain electromagnetic shielding effectiveness can be provided, so that the purpose of electrostatic discharge parameter measurement can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of electromagnetic shielding, and in particular relates to an electrostatic protection electromagnetic shielding test platform based on a microgravity environment. Background Art

[0002] Electrostatic discharge is an important factor that cannot be ignored for the safe operation of spacecraft in orbit. Without corresponding protective measures, it may cause static electricity breakdown of spacecraft electronic components, degrade material performance, and even affect the success or failure of the entire mission. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an electrostatic protection and electromagnetic shielding test platform based on a microgravity environment.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] An electrostatic protection electromagnetic shielding test platform based on a microgravity environment comprises: a shielding box, an electrostatic discharge generator is arranged inside the shielding box, and a test window and a waveguide window are arranged on the side wall of the shielding box; wherein, shielding effectiveness and electrostatic discharge parameter tests are performed on test material samples through the test window, and the shielding box can be placed in a microgravity environment formed by a drop tower for test experiments, and signal collection and processing of electrostatic protection electromagnetic shielding tests are performed on test material samples through the waveguide window.

[0006] Preferably, the shielding box comprises a cabin shielding door, the cabin shielding door adopts a single-pole double-spring structure, and the door body and door frame of the cabin shielding door are both made of aluminum profiles.

[0007] Preferably, the waveguide window is a waveguide bundle composed of a plurality of small waveguides, the cross-section of the small waveguide is hexagonal, and the cutoff frequency of the waveguide window is 10 kHz-18 GHz.

[0008] Preferably, a control panel is provided on the shielding box, and the control panel is used for triggering control of the electrostatic discharge generator, synchronous control of the drop tower release time and the electrostatic discharge trigger time, and remote control of sending and receiving test data.

[0009] Preferably, a control panel and an energy management module are provided on the shielding box, and the energy management module is composed of a filtering circuit, a boosting circuit, a voltage stabilizing circuit and an energy storage circuit; the energy management module receives electric energy from the portable mobile power supply, first filters the input voltage fluctuation through the filtering circuit; then boosts the voltage through the boosting circuit, and stabilizes the voltage through the voltage stabilizing circuit; and then stores the electric energy through the energy storage circuit.

[0010] Preferably, the shielding box is provided with the memory device for storing data acquired from the test experiment.

[0011] Preferably, the shielding box is a square cabin structure, the inner skin material of the cabin panel of the shielding box is a steel plate, the outer skin material of the shielding box is an aluminum plate, and the middle is a fully fluorine-free PIR polyurethane rigid foam material; the frequency range of the shielding box is 10MHz-18GHz, and the shielding effectiveness is not less than 60dB.

[0012] The present invention can not only adapt to the microgravity environment of the drop tower experiment, but also provide a certain test condition of electromagnetic shielding effectiveness to achieve the purpose of electrostatic discharge parameter measurement. It has the following advantages:

[0013] 1. Simulate specific scenarios and extreme environments of spacecraft on orbit, and be compatible with microgravity environment and electromagnetic shielding environment;

[0014] 2. The material of the space window for testing multi-factor effect electrostatic discharge parameters can be replaced;

[0015] 3. Extremely short test cycle controls the real-time performance of the communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 It is a front view of an electrostatic protection and electromagnetic shielding test platform based on a microgravity environment according to an embodiment of the present invention;

[0018] Figure 2 This is an internal cross-sectional view of an electrostatic protection and electromagnetic shielding test platform in a microgravity environment according to an embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional view of the shelter structure. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Embodiment 1:

[0023] like Figure 1 , 2 As shown, an embodiment of the present invention provides an electrostatic protection electromagnetic shielding test platform based on a microgravity environment, comprising: a shielding box, an electrostatic discharge generator is arranged inside the shielding box, and a test window and a waveguide window are arranged on the side wall of the shielding box; wherein, the shielding effectiveness and electrostatic discharge parameter tests are performed on the test material sample through the test window, and the shielding box can be placed in the microgravity environment formed by the drop tower for testing experiments, and the signal collection and processing of the electrostatic protection electromagnetic shielding test of the test material sample is performed through the waveguide window.

[0024] Preferably, the shielding box is a square cabin structure, the inner skin material of the cabin panel of the shielding box is a steel plate, the outer skin material of the shielding box is an aluminum plate, and the middle is a fully fluorine-free PIR polyurethane hard foam material; the inner skin is made of cold plate Q235 with a thickness of 1.2mm, and the outer skin is made of aluminum plate 3A21 with a thickness of 2mm. The frequency range of the shielding box is 10MHz-18GHz, and the shielding effectiveness is not less than 60dB.

[0025] As an implementation mode of an embodiment of the present invention, the shielding box includes a cabin shielding door, which adopts a single-pole double-spring structure. The door body and door frame of the cabin shielding door are made of aluminum profiles. The aluminum profiles are provided with a variety of stoppers. Copper reeds and shielding sealing strips are installed on the inner ring to ensure the shielding effect inside the cabin. Watertight rubber strips are installed on the outer ring to prevent rainwater from intrusion, which protects the reeds inside the cabin and the shielding layer.

[0026] As an implementation method of an embodiment of the present invention, the waveguide window is a waveguide bundle composed of many small waveguides, and the cross-sectional shape of the small waveguide is hexagonal. Since the square and hexagonal waveguides allow less wave types to propagate than the circular waveguides, they are more advantageous for the isolation of electromagnetic waves. Under the condition of equal insertion attenuation capability, the channel area of ​​the hexagonal waveguide is larger than that of the square waveguide, thereby increasing the ventilation area, and under the same size, the weight of the hexagonal waveguide structure is also lighter than that of the square waveguide. The waveguide window is selected to have a specification of 3.2mm, and the cutoff frequency of the waveguide window is 10kHz-18GHz, which is the same as the shielding effectiveness of the darkroom. The waveguide window is used to prevent the leakage of electromagnetic signals while ensuring air circulation. The waveguide window is the main channel for shielding the exchange of indoor air with the outside world, and it can effectively cut off the passage of electromagnetic waves. The waveguide size needs to achieve shielding effectiveness together with the thickness. Selecting a 3.2mm hexagonal waveguide window with a thickness of ≥8mm can meet the B-level standard required by GJB5792-2006.

[0027] As an implementation method of an embodiment of the present invention, a control panel, a power management module, a memory device and a communication chip device are provided in the shielding box. The control panel is used for triggering control of the electrostatic discharge generator, synchronous control of the drop tower release time and the electrostatic discharge trigger time, and remote control of the test data reception and transmission. The power management module is composed of a filter circuit, a boost circuit, a voltage stabilizing circuit and an energy storage circuit; the power management module receives the electric energy of the portable mobile power supply, first filters the input voltage fluctuation through the filter circuit; then boosts the voltage through the boost circuit, stabilizes the voltage through the voltage stabilizing circuit; and then stores it through the energy storage circuit. The memory device is used to store the data obtained from the test experiment. The communication chip device is responsible for transmitting the electrostatic discharge parameter test data after collection and processing, and supports wired communication such as cables and optical cables or Bluetooth, radio frequency, infrared, and GPRS wireless communication.

[0028] As an implementation method of the present invention, the shielding measures of the shielding box body are combined with the shielding inside and outside the shielding box. Figure 3 As shown, specifically including:

[0029] a) The cabin body adopts internal and external shielding;

[0030] b) The joints of the six-wall bulkhead plates of the shelter are welded by argon arc continuous welding;

[0031] c) The joint surface between the inner surface of the outer package and the deck: remove the oxide layer, apply conductive liquid, place the metal mesh between the outer package edge and the deck, and fix it with rivets;

[0032] d) After the inner and outer panels are pressed and bonded to the large panel frame, rivets are used around the door frame opening;

[0033] e) At the ventilation vents, the inner and outer panels of the large panel are pressed and bonded to the ventilation opening door frame of the large panel frame, and rivets are used around the opening of the door frame;

[0034] f) Install a waveguide window inside the vent;

[0035] i) Install power filter components and signal filter components at the power / signal ports;

[0036] j) Knife-type springs and shielding strips are used between the side door and the side door frame.

[0037] The embodiments described above are only descriptions of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An electrostatic protection and electromagnetic shielding test platform based on a microgravity environment, characterized in that: include: A shielding box is provided with an electrostatic discharge generator inside the shielding box, and a test window and a waveguide window are provided on the side wall of the shielding box; wherein, shielding effectiveness and electrostatic discharge parameter tests are performed on test material samples through the test window, and the shielding box can be placed in a microgravity environment formed by a drop tower for test experiments, and signal collection and processing of electrostatic protection electromagnetic shielding tests are performed on test material samples through the waveguide window.

2. The electrostatic protection and electromagnetic shielding test platform based on a microgravity environment as claimed in claim 1, characterized in that: The shielding box includes a cabin shielding door, which adopts a single-pole double-spring structure. The door body and door frame of the cabin shielding door are made of aluminum profiles.

3. The electrostatic protection and electromagnetic shielding test platform based on a microgravity environment as claimed in claim 2, characterized in that: The waveguide window is a waveguide bundle composed of many small waveguides, the cross-section of the small waveguide is hexagonal, and the cutoff frequency of the waveguide window is 10kHz-18GHz.

4. The electrostatic protection and electromagnetic shielding test platform based on a microgravity environment as claimed in claim 3, characterized in that: A control panel is provided on the shielding box, and the control panel is used for triggering control of the electrostatic discharge generator, synchronous control of the drop tower release time and the electrostatic discharge triggering time, and remote control of sending and receiving test data.

5. The electrostatic protection and electromagnetic shielding test platform based on a microgravity environment as claimed in claim 4, characterized in that: A control panel is provided on the shielding box body and an energy management module is provided, the energy management module is composed of a filtering circuit, a boosting circuit, a voltage stabilizing circuit and an energy storage circuit; the energy management module receives the electric energy of the portable mobile power supply, first filters the input voltage fluctuation through the filtering circuit; then boosts the voltage through the boosting circuit, stabilizes the voltage through the voltage stabilizing circuit; and then stores the electric energy through the energy storage circuit.

6. The electrostatic protection and electromagnetic shielding test platform based on a microgravity environment as claimed in claim 5, characterized in that: The shielding box is provided with the memory device for storing the data obtained from the test experiment.

7. The electrostatic protection and electromagnetic shielding test platform based on a microgravity environment as claimed in claim 6, characterized in that: The shielding box is a square cabin structure. The inner skin material of the cabin is steel plate, the outer skin material is aluminum plate, and the middle is a fully fluorine-free PIR polyurethane rigid foam material; the frequency range of the shielding box is 10MHz-18GHz, and the shielding effectiveness is not less than 60dB.

Images