A pulse source output structure that satisfies the requirement of constant electric field waveform and matches different antennas

Abstract

The present invention relates to a pulse source output structure that satisfies the requirement of an unchanged electric field waveform and matches different antennas, including an inductance adjustment device, a resistance adjustment device and an interface position adjustment device, wherein a replaceable wave-modulation inductor is provided in the inductance adjustment device, and a plurality of rotatable and positionable resistance chains are provided in the resistance adjustment device, one end of the wave-modulation inductor in the inductance adjustment device is connected to the high-voltage output end of the pulse source of a bounded wave simulator through a cable, and the other end is connected to one end of a resistance chain in the resistance adjustment device through a flexible wire, and the other end of the resistance chain connected to the wave-modulation inductor is connected to the antenna system of the bounded wave simulator through a flexible wire; the interface position adjustment device is arranged at the bottom of the resistance adjustment device. The present invention provides a universal interface structure design scheme for matching antenna systems of multiple sizes with the same pulse source, improves the design and installation efficiency of the bounded wave simulation test system, and saves construction costs.

Description

Technical Field

[0001] The invention relates to an electromagnetic pulse environment simulation experiment technology, in particular to a pulse source output structure that satisfies the requirement of an unchanged electric field waveform and matches different antennas. Background Art

[0002] The bounded wave simulator is the most widely used test facility for electromagnetic pulse radiation effect testing. Under information conditions, various electronic information equipment has been widely used in military and civilian key facilities and important targets, and its electromagnetic vulnerability threshold is gradually decreasing, which poses a serious threat to these facilities and targets. In order to conduct research on electromagnetic vulnerability and protection technology, it is necessary to establish various electromagnetic pulse simulation experimental systems.

[0003] At present, a large number of electromagnetic pulse bounded wave simulators have been built both at home and abroad, but these systems are simulation systems of specific structures, and can only configure pulse sources with specific indicators for antenna systems of specific sizes. The pulse sources with determined structures and performance cannot meet the needs of antenna systems of various sizes; therefore, each bounded wave simulator must be designed once, which increases the construction and design costs and reduces construction efficiency.

[0004] In order to improve construction efficiency and save construction costs, it is very necessary to design a pulse source output structure that can keep the electromagnetic pulse electric field waveform unchanged and match antennas of different sizes. Summary of the invention

[0005] The purpose of the present invention is to propose a pulse source output structure that satisfies the requirement of an unchanged electric field waveform and matches different antennas. Under the condition of satisfying the requirement of an unchanged electric field waveform of an electromagnetic pulse, by adjusting the output of the pulse source, a pulse source can be matched with radiating antenna systems of different sizes.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution:

[0007] A pulse source output structure that satisfies the requirement of an unchanged electric field waveform and matches different antennas, comprising an inductance adjustment device, a resistance adjustment device and an interface position adjustment device, wherein a replaceable wave-modulation inductor is provided in the inductance adjustment device, and a plurality of rotatable and positionable resistance chains are provided in the resistance adjustment device, one end of the wave-modulation inductor in the inductance adjustment device is connected to the high-voltage output end of a pulse source of a bounded wave simulator through a cable, and the other end is connected to one end of a resistance chain in the resistance adjustment device through a flexible wire, and the other end of the resistance chain connected to the wave-modulation inductor is connected to the antenna system of the bounded wave simulator through a flexible wire; the interface position adjustment device is arranged at the lower part of the resistance adjustment device, and is used to adjust the height of the resistance adjustment device to match antennas of different sizes;

[0008] The resistance adjustment device comprises an insulating box, an insulating wheel and a resistance chain, wherein the insulating wheel is detachably arranged in the insulating box, and a plurality of resistance chains with different impedances are arranged on the insulating wheel, and the inner walls at both ends of the insulating box are provided with conductive interfaces connected to the outside, and the two ends of each resistance chain are provided with connectors matching the conductive interfaces on the inner walls at both ends of the insulating box;

[0009] The inductance adjustment device includes a modulating inductor and an insulating mounting sleeve. Both ends of the insulating mounting sleeve are provided with an insulating cover body connected by a thread. Each end face of the insulating cover body is provided with a through hole. The modulating inductor is fixedly arranged in the insulating mounting sleeve through the insulating cover body. Both ends of the modulating inductor are connected to the outside through the through holes on the end faces of the insulating cover body.

[0010] The insulating wheel of the resistance adjustment device is an I-shaped wheel with a rotating shaft in the middle. The two ends of the rotating shaft are detachably inserted into the inner walls of the insulating box at both ends. The multiple resistance chains are parallel to the rotating shaft axis of the insulating wheel and are evenly distributed on a circumferential surface of the insulating wheel.

[0011] The conductive interfaces on the inner wall of the insulating box of the resistance adjusting device are all elastic components, and the elastic components include a body, a guide column and a spring. The body is composed of an inner connecting plate and an outer connecting rod vertically fixed to the side of the inner connecting plate. The inner connecting plate is installed on the inner wall of the insulating box through the guide column, and the outer connecting rod is penetrated through the inner wall of the insulating box. A spring is sleeved on the outer connecting rod, and one end of the spring is in contact with the side of the inner connecting plate, and the other end is in contact with the inner wall of the insulating box.

[0012] The conductive interface has a spherical groove on one side of its body that contacts the resistor chain, and correspondingly, the joints at both ends of the resistor chain are both spherical.

[0013] The interface position adjustment device is a lifting mechanism made of insulating non-metallic materials as a whole, and the insulating box of the resistance adjustment device is arranged on the upper part of the lifting mechanism.

[0014] The flexible conductor is a copper strip.

[0015] The beneficial effects of the present invention are as follows: the structure provided by the present invention provides a universal interface structure design scheme for matching the same pulse source with antenna systems of multiple sizes; the structure provided by the present invention is also suitable for matching multiple sets of pulse sources with antenna systems of multiple sizes in the same test site, that is, it provides a universal standard interface design scheme, improves the design and installation efficiency of the bounded wave simulation test system, and saves construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 Schematic diagram of the resistance adjustment device.

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0019] Figure 4 It is a three-dimensional schematic diagram of the insulating rotor.

[0020] Figure 5 Schematic diagram of a capacitor adjustment device.

[0021] In the figure, 1, a modulating inductor, 11, an insulating mounting sleeve, 12, an insulating cover;

[0022] 2. resistance chain, 21. insulating box, 22. insulating wheel, 23. conductive interface, 201. joint, 231. body, 232. guide column, 233. spring, 2311. inner connecting plate, 2312. outer connecting rod;

[0023] 3. Output interface connecting plate; 4. Lifting mechanism. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a pulse source output structure that satisfies the requirement of an unchanged electric field waveform and matches different antennas comprises an inductance adjustment device, a resistance adjustment device and an interface position adjustment device, wherein a replaceable wave-modulation inductor 1 is provided in the inductance adjustment device, and a plurality of rotatable and positionable resistance chains 2 are provided in the resistance adjustment device, one end of the wave-modulation inductor 1 in the inductance adjustment device is connected to the high-voltage output end of the pulse source of the bounded wave simulator through a cable, and the other end is connected to one end of a resistance chain 2 in the resistance adjustment device through a flexible wire, and the other end of the resistance chain 2 connected to the wave-modulation inductor 1 is connected to the antenna system of the bounded wave simulator through a flexible wire; the interface position adjustment device is arranged at the lower part of the resistance adjustment device, and is used to adjust the height of the resistance adjustment device to match antennas of different sizes;

[0026] like Figure 2 , Figure 4As shown, the resistance adjustment device comprises an insulating box 21, an insulating wheel 22 and a resistance chain 2, the insulating wheel 22 is detachably arranged in the insulating box 21, a plurality of resistance chains 2 with different impedances are arranged on the insulating wheel 22, the insulating box 21 is provided with conductive interfaces 23 connected to the outside on both ends of the inner wall of the insulating wheel 22, and both ends of each resistance chain 2 are provided with connectors 201 matching the conductive interfaces 23 on the inner walls of both ends of the insulating box 21;

[0027] like Figure 5 As shown, the inductance adjustment device includes a modulating inductor 1 and an insulating mounting sleeve 11. Both ends of the insulating mounting sleeve 11 are provided with an insulating cover body 12 connected by threads. Each end face of the insulating cover body 12 is provided with a through hole. The modulating inductor 1 is fixedly arranged in the insulating mounting sleeve 11 through the insulating cover body 12, and both ends of the modulating inductor 1 are connected to the outside through the through holes on the end faces of the insulating cover body 12.

[0028] like Figure 2 , Figure 4 As shown, the insulating wheel 22 of the resistance adjustment device is an I-shaped wheel with a rotating shaft in the middle, and the two ends of the rotating shaft are detachably inserted into the inner walls of the insulating box 21 at both ends. The multiple resistance chains 2 are parallel to the rotating shaft axis of the insulating wheel 22 and are evenly distributed on a circumferential surface of the insulating wheel 22.

[0029] like Figure 2 , Figure 3 As shown, the conductive interfaces 23 on the inner wall of the insulating box 21 of the resistance adjusting device are all elastic components, and the elastic components include a body 231, a guide column 232 and a spring 233. The body 231 is composed of an inner connecting plate 2311 and an outer connecting rod 2312 vertically fixed to the side of the inner connecting plate 2311. The inner connecting plate 2311 is installed on the inner wall of the insulating box 21 through the guide column 232, and the outer connecting rod 2312 is penetrated on the inner wall of the insulating box 21. A spring 233 is sleeved on the outer connecting rod 2312, and one end of the spring 233 is in contact with the side of the inner connecting plate 2311, and the other end is in contact with the inner wall of the insulating box 21.

[0030] like Figure 2 , Figure 3 As shown, the conductive interface 23 has a body 231 with a spherical groove on one side in contact with the resistor chain 2. Correspondingly, the connectors 201 at both ends of the resistor chain 2 are both spherical.

[0031] like Figure 1 , Figure 2The resistance chain 2 of the resistance adjusting device is connected to the antenna system of the bounded wave simulator through the output interface connecting plate 3. The output interface connecting plate 3 is fixedly arranged outside the insulating box 21 of the resistance adjusting device, and the output interface connecting plate 3 is connected to the conductive interface 23 on the inner wall of one end of the insulating box 21.

[0032] The interface position adjustment device is a lifting mechanism 4 made of insulating non-metallic material as a whole, and the insulating box 21 of the resistance adjustment device is arranged on the upper part of the lifting mechanism 4.

[0033] The flexible conductor is a copper strip.

[0034] The present invention is described below with reference to specific embodiments in combination with the above technical solutions.

[0035] Embodiment 1,

[0036] Now it is required that the pulse source can generate the following electric field waveform in the parallel section of the antenna system: the rate of change is 6.8*10 11 V / m / s, half width not less than 6us, peak value adjustable;

[0037] There are two types of antenna systems: 3m high parallel line antenna and 10m high parallel line antenna;

[0038] The size parameters of the 3m high parallel line antenna are as follows: the overall structure of the antenna system includes three parts: the front cone section, the parallel section, and the rear cone section. The front cone is 7m long, the horizontal section is 3.5m long, 3.6m wide, and 3m high. The rear cone is 5m long. The total length of the antenna is 15.5m and the width is 3.6m. The aspect ratio of the horizontal section is 1.2:1.

[0039] The size parameters of the 10m high parallel line antenna are as follows: the overall structure of the antenna system consists of three parts: the front cone section, the parallel section, and the rear cone section. The front cone is 30m long, the horizontal section is 15m long, 15m wide, 10m high, and the rear cone is 15m long. The total length of the antenna is 60m and the width is 15m. The aspect ratio of the horizontal section is 1.5:1;

[0040] The antenna brackets of both antenna systems are made of fiberglass wound tubes, the crossbeams are made of metal truss structures, the upper antenna plates are made of metal wires, and the lower antenna plates are stainless steel meshes fixed on the concrete floor; the distributed load is divided into multiple conical sections, each of which is connected to a resistor chain, and each resistor chain is composed of multiple high-voltage non-inductive high-power resistors connected in series.

[0041] The technical solution of the pulse source output structure designed for the above configuration is basically consistent with the technical solution provided in the invention content of the specification, which is omitted here, and the part described by determining the numerical value in this embodiment is now explained in detail:

[0042] Since the antenna system has a 3-meter-high parallel line antenna and a 10-meter-high parallel line antenna, two modulation inductors need to be directly replaced. The modulation inductor resistance value adapted to the 3-meter-high parallel line antenna is 2.8μH, and the modulation inductor resistance value adapted to the 10-meter-high parallel line antenna is 4.74μH.

[0043] The resistance adjustment device is to be adapted to 3m high and 10m high antenna systems respectively, therefore, two groups of resistance chains are involved, each group of resistance chains is composed of 9 voltage-dividing resistance chains, and the two groups of resistance chains can be quickly switched, so two insulating wheels can be made, and the resistance chain can be replaced by replacing the insulating wheels; 9 voltage-dividing resistance chains are installed on each insulating wheel, and these 9 voltage-dividing resistance chains should be placed in order and cannot be mixed up, so that the 9 voltage-dividing resistance chains on the wheel can be switched by rotation, which is convenient and quick.

[0044] After calculation, resistors and resistor chains with specific resistance values ​​are set, and the output structure provided by the present invention can be used to achieve the matching of a pulse source with two antenna systems. In this embodiment, after testing, for the 3m high parallel line antenna system, when the voltage divider resistors are in the states of 122Ω, 148Ω, and 180Ω, respectively, the peak voltages of the upper and lower plates of the parallel segment antenna are 180kv, 165kv, and 150kv, respectively, and the electric field strengths of the corresponding 3m high transmission lines are 60kv / m, 55kv / m, 50kv / m, 45kv / m, 40kv / m, and 35kv / m, respectively; the electric field change rate is 6.5*10 11 -7.0*10 11 v / m / s, relative 6.8*10 11 v / m / s, the error range is within ±5%, meeting the experimental requirements;

[0045] For the 10m high parallel line antenna system, when the voltage divider resistance is 143Ω, 200Ω, and 285Ω respectively, the peak voltage of the upper and lower plates of the parallel segment antenna is 300kv, 250kv, and 200kv respectively, and the electric field strength of the 10m high transmission line is 30kv / m, 25kv / m, and 20kv / m respectively; the electric field change rate is 6.5*10 11 -7.0*10 11 v / m / s, relative 6.8*10 11 v / m / s, and the error range is within ±5%, which also meets the test requirements.

[0046] Because antennas of different sizes have different heights from the ground at the starting port of the front cone section or the heights between the upper and lower plates, it is necessary to adjust the pulse source output height according to the antenna requirements. In this embodiment, the output interface connecting plate on the resistance adjusting device is equivalent to the output end of the pulse source. Therefore, an interface position adjusting device is installed at the bottom of the resistance adjusting device. The interface position adjusting device is made of non-metallic materials, and the adjustment height is adjustable within the range of 0.4-1.2m. The lifting platform is made of bakelite material and the four-bar principle, and the platform height is adjusted by rotating bolts.

[0047] In summary, the pulse source output structure for matching antennas of different sizes proposed in the present invention provides a universal interface structure design scheme for matching the same pulse source with antenna systems of multiple sizes, and is suitable for matching multiple sets of pulse sources with antenna systems of multiple sizes in the same test site.

[0048] Parts of the present invention not described in detail are prior art.

Claims

1. A pulse source output structure that satisfies the requirement of an unchanged electric field waveform and matches different antennas, comprising an inductance adjustment device, a resistance adjustment device and an interface position adjustment device, characterized in that: The inductance adjustment device is provided with a replaceable modulated inductor (1), and the resistance adjustment device is provided with a plurality of rotatable and positionable resistor chains (2). One end of the modulated inductor (1) in the inductance adjustment device is connected to the high-voltage output end of the pulse source of the bounded wave simulator via a cable, and the other end is connected to one end of a resistor chain (2) in the resistance adjustment device via a flexible wire. The other end of the resistor chain (2) connected to the modulated inductor (1) is connected to the antenna system of the bounded wave simulator via a flexible wire. The interface position adjustment device is arranged at the bottom of the resistance adjustment device and is used to adjust the height of the resistance adjustment device to match antennas of different sizes. The resistance adjustment device comprises an insulating box (21), an insulating wheel (22) and a resistance chain (2); the insulating wheel (22) is detachably arranged in the insulating box (21); a plurality of resistance chains (2) with different impedances are arranged on the insulating wheel (22); the insulating box (21) is provided with conductive interfaces (23) connected to the outside on both ends of the inner wall of the insulating wheel (22); and each resistance chain (2) is provided with connectors (201) matching the conductive interfaces (23) on the inner wall of both ends of the insulating box (21); The inductance adjustment device comprises a modulating inductor (1) and an insulating mounting sleeve (11), wherein both ends of the insulating mounting sleeve (11) are provided with an insulating cover body (12) connected by a thread, and each end face of the insulating cover body (12) is provided with a through hole, and the modulating inductor (1) is fixedly arranged in the insulating mounting sleeve (11) through the insulating cover body (12), and both ends of the modulating inductor (1) are connected to the outside through the through holes on the end face of the insulating cover body (12).

2. The pulse source output structure according to claim 1 that satisfies the requirement of constant electric field waveform and matches different antennas is characterized by: The insulating rotating wheel (22) of the resistance adjusting device is an I-shaped wheel with a rotating shaft in the middle, and the two ends of the rotating shaft are detachably inserted into the inner walls of the insulating box (21). The multiple resistance chains (2) are parallel to the rotating shaft axis of the insulating rotating wheel (22) and are evenly distributed on a circumferential surface of the insulating rotating wheel (22).

3. The pulse source output structure according to claim 1 that satisfies the requirement of constant electric field waveform and matches different antennas is characterized by: The conductive interfaces (23) on the inner wall of the insulating box (21) of the resistance adjusting device are all elastic components. The elastic components include a body (231), a guide column (232) and a spring (233). The body (231) is composed of an inner connecting plate (2311) and an outer connecting rod (2312) vertically fixed to the side of the inner connecting plate (2311). The inner connecting plate (2311) is installed on the inner wall of the insulating box (21) through the guide column (232). The outer connecting rod (2312) is inserted into the inner wall of the insulating box (21). A spring (233) is sleeved on the outer connecting rod (2312). One end of the spring (233) contacts the side of the inner connecting plate (2311) and the other end contacts the inner wall of the insulating box (21).

4. The pulse source output structure according to claim 3 that satisfies the requirement of an unchanged electric field waveform and matches different antennas is characterized in that: The conductive interface (23) has a body (231) with a spherical groove on one side thereof that contacts the resistor chain (2). Correspondingly, the connectors (201) at both ends of the resistor chain (2) are both spherical.

5. The pulse source output structure according to claim 1 that satisfies the requirement of constant electric field waveform and matches different antennas is characterized by: The resistance chain (2) of the resistance adjusting device is connected to the antenna system of the bounded wave simulator via an output interface connecting plate (3); the output interface connecting plate (3) is fixedly arranged outside the insulating box (21) of the resistance adjusting device; the output interface connecting plate (3) is connected to a conductive interface (23) on the inner wall of one end of the insulating box (21).

6. The pulse source output structure according to claim 1 that satisfies the requirement of constant electric field waveform and matches different antennas is characterized by: The interface position adjustment device is a lifting mechanism (4) made of an insulating non-metallic material as a whole, and the insulating box (21) of the resistance adjustment device is arranged on the upper part of the lifting mechanism (4).

7. The pulse source output structure according to claim 1 that satisfies the requirement of constant electric field waveform and matches different antennas is characterized by: The flexible conductor is a copper strip.

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