CN112540246B - Bounded wave strong electromagnetic pulse simulation system - Google Patents
Bounded wave strong electromagnetic pulse simulation system Download PDFInfo
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- CN112540246B CN112540246B CN202011190802.5A CN202011190802A CN112540246B CN 112540246 B CN112540246 B CN 112540246B CN 202011190802 A CN202011190802 A CN 202011190802A CN 112540246 B CN112540246 B CN 112540246B
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Abstract
The present application provides a bounded wave strong electromagnetic pulse simulation system. The system comprises a high-voltage pulse component and a waveguide type antenna connected with the high-voltage pulse component, wherein the tail end of the waveguide type antenna is connected with a load; the high-voltage pulse assembly comprises a direct-current high-voltage module, a charging resistor, an energy storage capacitor and an air switch which are sequentially connected, the capacitance value of the energy storage capacitor is adjustable, the air switch comprises a shell, a first electrode and a second electrode with variable discharge gaps are arranged in the shell, and working gas with variable pressure is filled in the shell; the direct-current high-voltage module is used for outputting direct-current high voltage and compressing the direct-current high voltage into the energy storage capacitor through the charging resistor, the energy storage capacitor is used for triggering the air switch to break down to form corresponding voltage pulse, and the voltage pulse is transmitted to a load through the waveguide antenna. The strong electromagnetic pulse output by the system has large amplitude, front edge and pulse width variation amplitude, small discrete degree and high system stability.
Description
Technical Field
The invention relates to the technical field of electromagnetic fields, in particular to a bounded wave strong electromagnetic pulse simulation system.
Background
The high altitude nuclear electromagnetic pulse (HEMP) effect test is a test for placing a subject in a HEMP environment, researching the effect rule of the subject, and evaluating the fighting efficiency and the survival ability of the subject in the HEMP environment, and is generally carried out in an artificially simulated radiation environment. At present, the domestic common HEMP simulator comprises a radiation wave simulator and a bounded wave simulator, and consists of a high-voltage pulse source, a transmission line, a terminal load and the like. A bounded wave simulator (also called a guided wave electromagnetic pulse simulator) employs a parallel plate transmission line as its antenna, along which electromagnetic waves propagate, mainly in the TEM mode. Parallel plate transmission line structures form the boundaries of waveguides during the propagation of electromagnetic waves and are therefore referred to as bounded wave simulators. Bounded wave simulators are often used to fail test electronic devices to simulate a HEMP environment. The bounded wave simulator is divided into large, medium and small bounded wave simulators according to size. The nano-chip is suitable for different objects, such as airplanes and tanks, and nano-chips. The small-sized bounded wave simulator is mainly used for performing the HEMP strong electromagnetic environment reliability test on some small-sized electronic products. With the complexity of the current information system and devices, the development unit hopes to understand the failure mode of the devices under strong electromagnetic pulses, so as to further strengthen the devices.
However, most of the conventional electromagnetic pulse simulators output a fixed electromagnetic pulse, and although a small amount of the electromagnetic pulse simulators can adjust output voltage, the amplitude variation is small, the discrete degree is large, and the stability is poor, so that a relatively long time is still spent on performing failure testing, and the testing accuracy is difficult to guarantee.
Disclosure of Invention
Therefore, it is necessary to provide an improved bounded wave strong electromagnetic pulse simulation system for solving the problems of small amplitude variation, large dispersion degree and poor stability of the electromagnetic pulse output by the conventional electromagnetic pulse simulator.
A bounded wave strong electromagnetic pulse simulation system comprises a high-voltage pulse component and a waveguide antenna connected with the high-voltage pulse component, wherein the tail end of the waveguide antenna is connected with a load;
the high-voltage pulse assembly comprises a direct-current high-voltage module, a charging resistor, an energy storage capacitor and an air switch which are sequentially connected, the capacitance value of the energy storage capacitor is adjustable, the air switch comprises a shell, a first electrode and a second electrode with variable discharge gaps are arranged in the shell, and working gas with variable pressure is filled in the shell;
the direct-current high-voltage module is used for outputting direct-current high voltage and compressing the direct-current high voltage into the energy storage capacitor through the charging resistor, the energy storage capacitor is used for triggering the air switch to be broken down to form corresponding voltage pulse, and the voltage pulse is transmitted to the load through the waveguide type antenna.
According to the bounded wave strong electromagnetic pulse simulation system, the change of the amplitude and the front edge of the output voltage pulse can be realized by adjusting the discharge gap and the gas pressure of the air switch, the change of the pulse width of the output voltage pulse can be realized by adjusting the capacitance value of the energy storage capacitor, the change is large in amplitude and small in dispersion degree, and the stability of the system is high, so that the failure sensitive point of a tested sample can be found under the condition that one electromagnetic simulator is used, the test time is greatly reduced, and the test precision can be improved to a certain extent.
In one embodiment, the housing includes a first side and a second side disposed opposite to each other, the first side being adjacent to the energy storage capacitor; the first electrode is connected with the first side through a sliding rod, the sliding rod is used for driving the first electrode to reciprocate along the axis of the first electrode under the action of external force, and the second electrode is fixedly connected with the second side.
In one embodiment, the apparatus further comprises an inflation assembly, the inflation assembly comprising: a gas tank for storing the working gas; the air inlet valve is arranged on the shell; and the pressure-indicating and pressure-stabilizing device is connected between the gas tank and the air inlet valve, is used for inflating the air inlet valve, and stops inflating the air inlet valve when the pressure of working gas in the shell reaches a set pressure value.
In one embodiment, the pressure variation range of the working gas is 0.5-6 atmospheres, and the variation range of the discharge gap is 0-20 mm.
In one embodiment, the capacitor comprises a capacitor mounting seat, the capacitor mounting seat is detachably connected with the energy storage capacitor, and when the energy storage capacitor is mounted on the capacitor mounting seat, the energy storage capacitor is coaxial with the first electrode and the second electrode.
In one embodiment, the capacitor mount includes a first insulating block and a second insulating block; a first copper block is arranged on the first insulating block, one end of the first copper block is grounded, the other end far away from the ground is provided with a first groove, and one end of the energy storage capacitor is supported and leaned in the first groove; and a second copper block is arranged on the second insulating block, one end of the second copper block is connected with the air switch, a second groove is formed in the other end of the second copper block, which is far away from the air switch, and one end of the energy storage capacitor, which is far away from the first copper block, is supported and leaned in the second groove.
In one embodiment, a discharge groove is formed in the second copper block, the high-voltage pulse assembly further includes an automatic discharge device, and the automatic discharge device includes: a motor; the discharging rod is connected with the power output end of the motor; after the air switch is broken down, the motor drives the discharging rod to move to be in contact with the discharging groove, and after the preset time, the motor drives the discharging rod to reset.
In one embodiment, a charging interface is further arranged on the second copper block, and the charging resistor is connected into the charging interface.
In one embodiment, the waveguide antenna comprises an input port, a TEM cell and an output port, which are connected in sequence, the input port is connected with the output end of the air switch, the TEM cell is used for generating a uniform electromagnetic field when transmitting a voltage pulse, and the output port is connected with the load.
In one embodiment, the electric field strength generated within the TEM cell is in the range of 0-300 kV/m.
Drawings
FIG. 1 is a system diagram of an embodiment of the present application;
FIG. 2 is a schematic view of a component connection according to an embodiment of the present application;
FIG. 3 is a cross-sectional view of a coaxial structure at the front end of a discharge circuit according to an embodiment of the present application;
FIG. 4 is a waveform diagram of voltage pulses output by an embodiment of the present application;
FIG. 5 is a waveform diagram of a voltage pulse output according to another embodiment.
The reference numerals of the various elements in the figures denote the following:
100. the system comprises a bounded wave strong electromagnetic pulse simulation system 10, a high-voltage pulse component 20, a waveguide antenna 30, a load 40 and an oscilloscope;
11. the energy storage capacitor charging system comprises a box body, 12, an energy storage capacitor, 13, an air switch, 14, a left capacitor mounting seat, 15, a right capacitor mounting seat, 16 and an inflation assembly;
130. the device comprises a shell, 131, a first electrode, 132, a second electrode, 133, a sliding rod, 134, a supporting rod, 135, a driver, 141, a first insulating block, 142, a first copper block, 143, a first groove, 151, a second insulating block, 152, a second copper block, 153, a second groove, 154, a charging interface, 161, an air tank, 162, a pressure-indicating and pressure-stabilizing device, 163 and an air inlet valve;
21. input port, 22, output port, 23, TEM cell, 24, transmission line.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "upper," "lower," "front," "rear," "circumferential," and the like are based on the orientation or positional relationship shown in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The traditional simulator mainly comprises a Marx system bounded wave electromagnetic pulse simulator, a Marx system radiation wave electromagnetic pulse simulator, a solid high-power high-repetition-frequency bounded wave electromagnetic pulse simulator, a solid high-power high-repetition-frequency radiation wave electromagnetic pulse simulator, a capacitor direct discharge type bounded wave electromagnetic pulse simulator and a multifunctional electromagnetic pulse simulator. However, most of the above electromagnetic pulse simulators output a fixed electromagnetic pulse, and although a small amount of the electromagnetic pulse simulators can adjust the output voltage, the amplitude variation is small, the dispersion degree is large, and the stability is poor, so that a relatively long time is still spent on performing failure tests, and the test accuracy is difficult to guarantee.
In response to the above-described deficiencies, the present application provides an improved bounded wave strong electromagnetic pulse simulation system 100. Referring to fig. 1 to 3, a bounded wave strong electromagnetic pulse simulation system 100 of the present application includes a high voltage pulse component 10, a waveguide antenna 20, and a load 30, which are connected in sequence, and performs online monitoring on a voltage waveform across the load 30 through an oscilloscope 40. The high voltage pulse assembly 10 may be used for high voltage pulses and the waveguide antenna 20 used to simulate a high altitude nuclear electromagnetic pulse (HEMP) environment.
Specifically, the high-voltage pulse assembly 10 includes a direct-current high-voltage module, a charging resistor, an energy storage capacitor 12 and an air switch 13, which are connected in sequence, the capacitance value of the energy storage capacitor 12 is adjustable, the air switch 13 includes a housing 130, and a first electrode 131 and a second electrode 132, which have variable discharge gaps, are disposed in the housing 130, and are filled with working gas with variable pressure. To facilitate the wiring, the dc high voltage module, the charging resistor, the energy storage capacitor 12 and the air switch 13 may be disposed in the corresponding partitions of the case 11, respectively.
The dc high voltage module is provided with a control board (not shown) for switching on and off the main circuit. The control panel is provided with a singlechip, the singlechip interacts with an upper computer (computer) in a simplex mode through a USB data line, and the singlechip executes corresponding operation according to a received instruction. Still be provided with the rectification module of raising the frequency beside the control panel, the theory of operation of rectification module of raising the frequency does: five power frequency transformers from 220V to 15V are used for supplying power to four paths of IGBTs and one path of SG3525 control circuit; and then a 220V-to-36V power frequency transformer is used for supplying power to the full-bridge inverter circuit. When the computer sends out an on command, SG3525 sends out a PWM wave with a certain frequency, so that the main circuit outputs a square wave with a corresponding frequency.
Further, the dc high voltage module is further provided with a boost module (not shown) connected to the rectification boost module. The boosting module comprises a high-frequency transformer, a 10-time voltage-multiplying rectifying plate and an oil box. The main working principle is as follows: the full-bridge inverter circuit outputs square waves of 48V and 14kHz, and the square waves pass through a high-frequency transformer to output approximate sine waves with the voltage of about 4 kV. Finally, the sine wave is rectified and amplified to a fluctuating direct current voltage of about 20kV through a 10-time voltage-multiplying rectifying circuit.
The charging resistor is used for compressing the fluctuating direct current voltage and storing the direct current voltage into the energy storage capacitor. The present application uses a non-inductive resistor of 20M Ω, and performs an ignition prevention process.
The upper limit of the energy storage capacitor 12 will directly affect the final output voltage pulse limit of the whole high voltage pulse assembly, so that under the condition that the load 30 is not changed, the difference of the capacitance values of the energy storage capacitor 12 will determine the pulse width of the output pulse. Specifically, the capacitance value can be changed by changing the distance and the relative area of the pole plates in the energy storage capacitor and the dielectric constant of the medium between the pole plates, and the capacitance value can also be changed by directly replacing different energy storage capacitors. Preferably, the energy storage capacitor 12 is a CBB non-inductive metal thin film capacitor.
Referring to fig. 3, the air switch 13 may change the amplitude and leading edge of the output voltage pulse by adjusting the distance between the first electrode 131 and the second electrode 132 (i.e., the size of the discharge gap), or by adjusting the kind and pressure of the charged working gas. The first electrode 131 and the second electrode 132 are both two hemispheres made of pure copper. Wherein, the variation range of the discharge gap is 0-20 mm, the pressure of the gas is 0.5-6 atmospheres, correspondingly, the high-voltage pulse component 10 can output voltage pulse with the amplitude of 0-40 kV and the leading edge of 8-30 ns. Further, the air switch 13 has an initial adjustment position in which the discharge gap is maximized, for example, 20mm, to prevent the air switch 13 from being broken down at the beginning, which may affect the testing effect.
After the dc high voltage module outputs the dc high voltage, the dc high voltage is compressed into the energy storage capacitor 12 through the charging resistor, the energy storage capacitor 12 is configured to trigger the air switch 13 to break down to form a corresponding voltage pulse, and the voltage pulse is transmitted to the load 30 through the waveguide antenna 20. Specifically, the waveguide antenna 20 is also called a TEM cell because most of the transmitted electromagnetic waves are transverse electromagnetic waves. The working space which can be used is the central TEM cell, the field strength of which is
V is the potential difference between the transmission line 24 and the upper and lower plates, which can be considered herein as the voltage on the load 30; h is the distance between the transmission line 24 and the upper and lower plates. Preferably, the characteristic impedance of the waveguide antenna is 50.2 Ω, and the applicable frequency band is 0 to 900 MHz. The upper polar plate and the lower polar plate are two same aluminum plates, and the field intensity of the transmission line to the upper polar plate and the lower polar plate is approximately the same. In actual operation, the probe can be placed on the upper polar plate, the test plate can be placed on the lower polar plate, and the support for supporting the upper polar plate, the lower polar plate and the transmission line can be made of polytetrafluoroethylene.
The bounded wave strong electromagnetic pulse simulation system 100 can realize the change of the amplitude and the leading edge of the output voltage pulse by adjusting the discharge gap and the gas pressure of the air switch 13, can realize the change of the pulse width of the output voltage pulse by adjusting the capacitance value of the energy storage capacitor 12, has large amplitude and small discrete degree of the change, and has high system stability, thereby being capable of finding the failure sensitive point of a tested sample under the condition of using one electromagnetic simulator, greatly reducing the testing time and improving the testing precision to a certain extent.
In an exemplary embodiment, as shown in fig. 3, the housing 130 includes a first side and a second side disposed opposite to each other, the first side being adjacent to the energy storage capacitor 12; the first electrode 131 is connected with the first side through a sliding rod 133, the sliding rod 133 is used for driving the first electrode 131 to reciprocate along the axis of the sliding rod 133 under the action of external force, and the second electrode 132 is fixedly connected with the second side. Specifically, the sliding rod 133 is connected to the positive electrode of the energy storage capacitor 12, the air switch 13 further includes a supporting rod 134 for supporting the first electrode 131 and a driver 135 for driving the first electrode 131 to move, wherein the supporting rod 134 can support the first electrode 131 by being connected to the sliding rod 133, the other end of the supporting rod 134 is physically connected to the driver 135, and the driver 135 can be a high-precision stepping motor. Further, the air switch 13 further includes a power supply for supplying power to the stepping motor and a controller for controlling the stepping motor.
In the exemplary embodiment, further includes an inflation assembly 16, the inflation assembly 16 including: a gas tank 161 for storing working gas; an intake valve 163 provided in the housing 130; and a pressure-indicating pressure-stabilizing device 162 connected between the air tank 161 and the intake valve 163 for inflating the intake valve, and stopping inflation of the intake valve 163 when the working gas pressure in the housing 130 reaches a set pressure value. Specifically, the gas tank 161 may have a plurality of tanks, and each tank may store a different kind of gas, such as dry air, argon gas, neon gas, or the like, which is an insulating, low-chemical-activity gas. Different gas tanks can be arranged on different branch pipelines, and when a certain kind of gas needs to be introduced, the gas can be inflated only by opening the valve on the corresponding branch pipeline.
The pressure display stabilizer 162 is used to display the air pressure in the air switch 13 and stabilize the air pressure in the air switch 13. Specifically, before the air intake valve 163 is inflated, a preset air pressure may be set for the pressure-indicating pressure-stabilizing device 162, and then the air intake valve 163 is opened to inflate. When the air pressure in the air switch 13 reaches the preset air pressure, it is closed, and the air tank 161 is stopped from charging the air intake valve 163. Finally, the air valves of the air inlet valve 163 and the air tank 161 are closed, and the primary air charging process is completed.
In an exemplary embodiment, a capacitive mount is also included. Taking fig. 3 as an example, the capacitor mounting base includes a left capacitor mounting base 14 and a right capacitor mounting base 15, the energy storage capacitor 12 is detachably connected to both the left capacitor mounting base and the right capacitor mounting base, and when the energy storage capacitor 12 is mounted on the capacitor mounting base, the energy storage capacitor 12 is coaxial with the first electrode 131 and the second electrode 132, so that the shortest routing between the energy storage capacitor 12 and the air switch 13 is achieved, the inductance caused by the line is reduced, and a better voltage pulse is output. Because the energy storage capacitor 12 is detachably connected with the capacitor mounting seat, the replacement is also convenient, thereby being beneficial to the adjustment of the pulse width of the output voltage pulse.
Further, with reference to fig. 3, the left capacitor mounting base 14 includes a first insulating block 141, a first copper block 142 is disposed on the first insulating block 141, one end of the first copper block 142 is grounded, the other end away from the ground is provided with a first groove 143, and one end of the energy storage capacitor 12 is supported in the first groove 143; the right capacitor mounting base 15 comprises a second insulating block 151, a second copper block 152 is arranged on the second insulating block 151, one end of the second copper block 152 is connected with the air switch 13, the other end far away from the air switch 13 is provided with a second groove 153, and one end, far away from the first copper block 142, of the energy storage capacitor 12 is supported in the second groove 153. Because the two ends of the energy storage capacitor 12 are clamped in the grooves of the copper block, the energy storage capacitor 12 is in a floating state, and even if the two ends of the energy storage capacitor 12 are not clamped, the contact of the capacitor is good due to the self weight. Moreover, the arrangement greatly facilitates the replacement of the energy storage capacitor 12, and the 'instant use after putting' is realized. Both the first insulating block 141 and the second insulating block 151 may be made of teflon.
In an exemplary embodiment, the second copper block 152 is provided with a discharge slot, and the high voltage pulse assembly 10 further includes an automatic discharge device (not shown) for discharging the residual charge in the energy storage capacitor 12 after the air switch 13 breaks down. The automatic discharge device includes: a motor; the discharging rod is connected with the power output end of the motor; after the air switch is broken down, the motor drives the discharging rod to move to be in contact with the discharging groove, and after a preset time (such as 2s), the motor drives the discharging rod to reset. Further, the motor of the automatic discharging device can act under the control of the control board in the direct current high-voltage module. After can guaranteeing air switch 13 to puncture, before next electric capacity charges through setting up automatic discharge device, the electric quantity of electric capacity is 0 to be favorable to air switch 13 when gaseous kind is confirmed, carry out quick adjustment to the discharge gap, and then obtain required voltage pulse.
In an exemplary embodiment, the second copper block 152 is further provided with a charging interface, and the charging resistor is connected to the charging interface, so as to charge the energy storage capacitor 12.
In an exemplary embodiment, the waveguide antenna 20 includes an input port 21, a TEM cell 23 and an output port 22 connected in sequence, the input port 21 being connected to the output of the air switch 13, the TEM cell 23 being used to generate a uniform electromagnetic field between the plate and the transmission line 24 when the transmission line 24 transmits a voltage pulse, and the output port 22 being connected to a load 30. Further, a port transition section is connected between the input port 21 and the TEM cell 23 to reduce the impedance mismatch effect between the input port 21 and the transmission line 24 and to reduce the emission of electromagnetic waves. Specifically, the input port 21 transitions from a cylindrical body to a conical body. In addition, the upper and lower plates of the waveguide antenna 20 are designed in a recessed manner, that is, the upper and lower plates are embedded in the teflon support, so that the edge discharge phenomenon between the transmission line 24 and the upper and lower plates is prevented, and the influence of the uneven field intensity at the edge on the overall performance of the waveguide antenna 20 is reduced. On the other hand, theoretically, the TEM cell 23 requires an initial frequency of 100kHz for transient test, and as the frequency increases, high-order modes of each order are excited in the TEM cell 23, and in order to avoid the generation of the high-order modes, the upper limit frequency of the TEM cell 23 is 100kHz to 375 MHz.
Furthermore, the electric field intensity generated in the TEM cell ranges from 0kV/m to 300kV/m, so that the simulation of a real HEMP environment is facilitated.
In an exemplary embodiment, the load 30 may be formed by winding RI80 high-frequency non-inductive glaze film resistor in a wheel-type symmetrical structure, so as to facilitate reducing the inductance of the whole resistor and simultaneously improve the voltage withstanding level of the resistor. An oscilloscope 40 is connected to the load 30 for acquiring waveforms across the load 30.
The following two specific examples will demonstrate the strong electromagnetic pulse formed under specific conditions.
Detailed description of the preferred embodiment
The energy storage capacitor 12 is adjusted to 476pF, the working gas in the air switch 13 is adjusted to dry air, the pressure is 0.5 atmosphere, and the discharge gap is 5 mm.
As shown in fig. 4, it can be seen that the resulting voltage pulse in this case has a peak value close to 40kV, a rising edge of 8ns and a pulse width of 53 ns.
Detailed description of the invention
The energy storage capacitor 12 is adjusted to 33nF, the working gas in the air switch 13 is adjusted to dry air, the pressure is 1 atmosphere, and the discharge gap is 10 mm.
As shown in fig. 5, it can be seen that the voltage pulse formed in this case has a peak value close to 30kV, a rising edge of 32.8ns, and a pulse width of 1.19 μ s.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A bounded wave strong electromagnetic pulse simulation system is characterized by comprising a high-voltage pulse component and a waveguide antenna connected with the high-voltage pulse component, wherein the tail end of the waveguide antenna is connected with a load;
the high-voltage pulse assembly comprises a direct-current high-voltage module, a charging resistor, an energy storage capacitor and an air switch which are connected in sequence;
the capacitance value of the energy storage capacitor is adjustable;
the air switch comprises a shell, wherein a first electrode and a second electrode with variable discharge gaps are arranged in the shell, and working gas with variable pressure intensity is filled in the shell;
the direct-current high-voltage module is used for outputting direct-current high voltage and compressing the direct-current high voltage into the energy storage capacitor through the charging resistor, the energy storage capacitor is used for triggering the air switch to be broken down to form corresponding voltage pulse, and the voltage pulse is transmitted to the load through the waveguide type antenna;
the air switch changes the amplitude and the leading edge of an output voltage pulse by adjusting the distance between the first electrode and the second electrode, or changes the amplitude and the leading edge of the output voltage pulse by adjusting the type and the pressure of the charged working gas, or changes the width of the voltage pulse by adjusting the capacitance value of the energy storage capacitor, and the air switch has an initial adjusting position at which the discharge gap in the air switch is maximized;
the bounded wave strong electromagnetic pulse simulation system also comprises a capacitor mounting seat and an automatic discharging device,
the capacitor mounting seat comprises a first insulating block and a second insulating block; a first copper block is arranged on the first insulating block, one end of the first copper block is grounded, the other end far away from the ground is provided with a first groove, and one end of the energy storage capacitor is supported and leaned in the first groove; a second copper block is arranged on the second insulating block, one end of the second copper block is connected with the air switch, a second groove is formed in the other end, far away from the air switch, of the second copper block, and one end, far away from the first copper block, of the energy storage capacitor is supported and leaned in the second groove; a discharge groove is formed in the second copper block;
the capacitor mounting seat further comprises a left capacitor mounting seat and a right capacitor mounting seat, the energy storage capacitor is detachably connected with the left capacitor mounting seat and the right capacitor mounting seat, and when the energy storage capacitor is mounted on the capacitor mounting seat, the energy storage capacitor is coaxial with the first electrode and the second electrode;
the automatic discharging device comprises a motor; the discharge rod is connected with the power output end of the motor; after the air switch is broken down, the motor drives the discharging rod to move to be in contact with the discharging groove, and after the preset time, the motor drives the discharging rod to reset.
2. The bounded wave strong electromagnetic pulse simulation system of claim 1, wherein the housing comprises first and second oppositely disposed sides, the first side proximate to the energy storage capacitor;
the first electrode is connected with the first side through a sliding rod, the sliding rod is used for driving the first electrode to reciprocate along the axis of the first electrode under the action of external force, and the second electrode is fixedly connected with the second side.
3. The bounded wave strong electromagnetic pulse simulation system of claim 1, further comprising an inflation assembly, the inflation assembly comprising:
a gas tank for storing the working gas;
the air inlet valve is arranged on the shell; and the number of the first and second groups,
and the pressure indicating and stabilizing device is connected between the gas tank and the gas inlet valve, is used for inflating the gas inlet valve, and stops inflating the gas inlet valve when the pressure of working gas in the shell reaches a set gas pressure value.
4. The bounded wave strong electromagnetic pulse simulation system of any one of claims 1-3, wherein the pressure of the working gas varies from 0.5 atm to 6 atm, and the discharge gap varies from 0mm to 20 mm.
5. The bounded wave strong electromagnetic pulse simulation system of claim 1, further comprising a capacitor mount removably coupled to the energy storage capacitor, the energy storage capacitor being coaxial with the first electrode and the second electrode when the energy storage capacitor is mounted on the capacitor mount.
6. The bounded wave strong electromagnetic pulse simulation system of claim 3, wherein the inflation assembly comprises a plurality of gas tubes, each gas tank storing a different type of gas.
7. The bounded wave strong electromagnetic pulse simulation system of claim 6, wherein the gas comprises dry air, argon, neon.
8. The bounded wave strong electromagnetic pulse simulation system according to claim 1, wherein a charging interface is further arranged on the second copper block, and the charging resistor is connected to the charging interface.
9. The bounded wave strong electromagnetic pulse simulation system of claim 1, wherein the waveguide antenna comprises an input port, a TEM cell, and an output port connected in series, the input port being connected to the output of the air switch, the TEM cell being configured to generate an electromagnetic field when transmitting a voltage pulse, the output port being connected to the load.
10. The bounded wave strong electromagnetic pulse simulation system of claim 9, wherein the electric field strength generated within the TEM cell ranges from 0 to 300 kV/m.
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| CN113899923B (en) * | 2021-10-18 | 2024-02-23 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | HEMP radiation field and injection energy synchronous loading test environment simulation system and method |
| CN114034952B (en) * | 2021-11-04 | 2023-09-22 | 西南科技大学 | Strong electromagnetic pulse simulator with waveform convenient to switch and configuration method thereof |
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| CN212570753U (en) * | 2020-08-21 | 2021-02-19 | 元六鸿远(苏州)电子科技有限公司 | Device for assisting large-size multilayer ceramic dielectric capacitor in welding lead |
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| CN103237183A (en) * | 2012-11-22 | 2013-08-07 | 李明锁 | Television with antenna isolator |
| CN104360114A (en) * | 2014-11-20 | 2015-02-18 | 国家电网公司 | 10 KV square-wave voltage generator for checking performance of impulse voltage divider |
| CN105891563A (en) * | 2014-12-16 | 2016-08-24 | 中国人民解放军63973部队 | High-altitude nuclear explosion electromagnetic pulse standard signal analog device |
| CN109031109A (en) * | 2018-07-25 | 2018-12-18 | 西安交通大学 | The breaker post-arc current measuring device and method with compensation are measured based on structure capacitive dynamic |
| CN109450413A (en) * | 2018-11-07 | 2019-03-08 | 北京京航计算通讯研究所 | Simulate the high pressure two fingers number wave impulse source of complex electromagnetic environment |
| CN212570753U (en) * | 2020-08-21 | 2021-02-19 | 元六鸿远(苏州)电子科技有限公司 | Device for assisting large-size multilayer ceramic dielectric capacitor in welding lead |
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