CN111302782A - Physical signal isolation and protection device for motor-driven field electronic equipment - Google Patents

Abstract

The invention provides a physical signal isolation and prevention device for motorized field operation electronic equipment. The lightning and electromagnetic pulse isolation protection device comprises a metal oxide magnetic ring, and a primary reactance coil and a secondary reactance coil which are connected with the metal oxide magnetic ring, wherein the primary reactance coil comprises an input port which receives input of lightning and electromagnetic pulse signals, and the secondary reactance coil comprises an output port which outputs signals processed by a physical signal isolation protection device; the physical signal isolation and precaution device is used for carrying out physical Joule energy isolation processing on the received thunder and electromagnetic pulse signals. The device has higher lightning current resisting energy, is very suitable for geological and severe places such as mountainous areas, watersheds, Gobi, grasslands and the like and high lightning areas, and is an ideal protection device for mobile field operation system equipment.

Description

Physical signal isolation and protection device for motor-driven field electronic equipment

Technical Field

The invention relates to the technical field of lightning protection, in particular to a physical signal isolation and prevention device for motorized field operation electronic equipment.

Background

In modern war, fixed command system, communication system, weaponry and medical logistics supply system, geographical position is fixed, and survivability is extremely poor, is difficult to adapt to the war survival demand under high technical condition. Integrated comprehensive information systems such as a motorized small-area field operation array, a motorized field operation command post, a motorized field operation hospital, a motorized field operation logistics support warehouse, a motorized field operation communication vehicle (a field operation radar vehicle, a field operation monitoring vehicle and a communication command vehicle) and a motorized small-area operation array (a radar station, a navigation station and a command center machine room) must have functions of transfer and motorized deployment at any time. The combat demands set temporarily under different environmental conditions are different, and the system also needs to cope with the examination of the severe environment and climate in the nature under the attack of 'soft killing' and 'hard destruction' of defending enemies. Especially lightning destruction is important. A lightning stroke means a single or multiple lightning current impact, which can cause serious damage to electronic system lines and equipment. This is a devastating damage to the information-based device. As thunder has the tendency and characteristics of finding the minimum path to discharge thundercloud charges and rapidly neutralizing the geodetic charges, and the mobile field operation system works in the field, when the lightning phenomenon occurs nearby, strong induced lightning waves easily enter equipment along a cable and a communication signal line, so that equipment damage and personal safety accidents are caused.

Therefore, the lightning protection which meets the use requirements of all regions and all weather and fully ensures the personal safety and the equipment safety becomes an essential key link in the safety design of the mobile field operation system. Therefore, the army also issues correspondingly: GJB7581-2012 'requirements for lightning protection of mobile communication systems', GJB5080-2004 'requirements for lightning protection design and use of military communication facilities', GJB6784-2009 'general requirements for lightning protection of military ground electronic facilities', GJB6071-2007 'requirements for lightning protection technology of military meteorological stations', GJB1389A-2005 'requirements for system electromagnetic compatibility', GJB8848-2016 'test methods for system electromagnetic environmental effects', and BMB5-2000 'requirements for electromagnetic leakage emission protection of confidential information equipment use sites'; BMBl 7-2006 requirements for hierarchical protection of information systems relating to national secrets; GJB5792-2006 electromagnetic shielding room grade division and measurement method for military secret-related information systems aims to thoroughly reduce and solve lightning damage and lightning protection problems and also aims to prevent electromagnetic attack, electromagnetic leakage and other problems.

Meanwhile, to prevent external electromagnetic interference input destruction, as is known, future war is electromagnetic war, and the existing advanced electromagnetic weapons such as EMP bomb and the like can directly introduce and destroy military electronic and microelectronic equipment along power supply circuit and data communication circuit. The problem of transmission of line conduction leakage of information equipment must be paid high attention. Information equipment is often subjected to electromagnetic attacks during operation, so that the system is broken down and the information storage unit is permanently damaged. Security accidents such as loss of information sometimes occur.

Electromagnetic attacks in nature, such as lightning high-voltage large-current impact, high-power overvoltage flashover, inductive load and capacitive load on-off overvoltage and the like threaten the information working safety and hardware storage safety of information equipment. The system protection function of the confidential computer is added while the electromagnetic leakage is prevented, and the same importance is given to further guarantee the safe hardware storage and the data safety of the confidential computer. The TEMPEST technology is electromagnetic security protection for electromagnetic environment, and comprises a series of technologies for analyzing, testing, receiving, restoring and protecting sensitive information carried in electromagnetic leakage signals, wherein the TEMPEST is a general name of a series of fields forming information security and confidentiality and is a basic measure for preventing radiation leakage. These devices are designed and produced with radiation protection measures to minimize electromagnetic leakage from the devices.

The electromagnetic radiation interference technology is that an interference unit is adopted to carry out electromagnetic interference on computer radiation, so that a stealing party is difficult to extract information. There are two methods of using noise interferers:

firstly, a disturber capable of generating noise is placed beside the computer equipment, and the noise generated by the disturber and the information radiation generated by the computer equipment are radiated outwards together, so that the radiation generated by the computer equipment is not easy to be accepted and reproduced. The electromagnetic radiation generated by the jammer should not exceed the EMI standard.

Secondly, a computer for processing important information is arranged in the middle, and some devices for processing general information are arranged around the computer, so that electromagnetic leakage generated by the devices radiates outwards together.

Filtering techniques are a complement to masking techniques. The shielded devices and components are not completely sealed within the shield and the power, signal and common ground lines need to be connected to the outside. Thus, the electromagnetic waves can also be transmitted from the outside into the shield or from the inside to the outside by conduction or radiation. The filtering technology is adopted, only signals of certain frequencies are allowed to pass, and signals of other frequency ranges are prevented, so that the filtering effect is achieved.

The disadvantages of the signal isolation guarding devices in the prior art include:

1. the existing signal isolation precaution devices usually implement a conditional so-called "electrical" isolation by means of a series resistance, the main disadvantage being that the residual voltage is too high.

2: the existing signal isolation and precaution devices usually realize conditional so-called 'electrical' isolation by series resistors, and have the main defect that the attenuation of normal working signals is large and is usually more than 2db.

3: the existing signal isolation and prevention device usually realizes conditional so-called 'electrical' isolation by a series resistor, and has the main defects that the resistor is damaged and loses the isolation function frequently caused by lightning strike.

4: the existing signal isolation and precaution device usually realizes conditional so-called 'electrical' isolation by a series resistor, and has the main defects that joule energy is not completely isolated, but only 'partial' bearing attenuation on the resistor is caused, and the unfortunate and wonderful damage of the military equipment of the maneuvering field operations is often caused in practical use.

5: the existing signal isolation and precaution device usually adopts an active optical coupler to realize conditional so-called 'electrical' isolation, and has the main defect that the linear area of an optical coupler device is narrow and cannot meet the requirements of user equipment.

6: the existing signal isolation and prevention device usually adopts an active optical coupler to realize conditional so-called 'electrical' isolation, and has the main defects that an optical coupler device needs a driving power supply, the power supply is difficult to find in reality, and the requirements of the military equipment of the maneuvering field operations cannot be met.

7: the existing signal isolation and protection device usually realizes conditional so-called 'electrical' isolation through a series resistor, and has the main defects that the signal isolation and protection device is naturally burnt out when an alternating current 220V voltage (test) is applied, and no isolation function can pass an alternating current carrying test required by an IEEE standard communication protocol.

Disclosure of Invention

The embodiment of the invention provides a physical signal isolation and protection device for motorized field operation electronic equipment, which aims to overcome the problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme.

A physical signal isolation precaution device for motorized field operation electronic equipment, comprising: the primary reactance coil comprises an input port which receives input of thunder and lightning and electromagnetic pulse signals, and the secondary reactance coil comprises an output port which outputs signals processed by the physical signal isolation precaution device;

the physical signal isolation and precaution device is used for carrying out physical Joule energy isolation processing on the received thunder and electromagnetic pulse signals.

Preferably, the primary reactance coil and the secondary reactance coil are double-wire same-direction surrounding bodies along the magnetic ring.

Preferably, the high-frequency inductance of the primary reactance coil is equal to the high-frequency inductance of the secondary reactance coil; or the high-frequency inductance of the primary reactance coil is not more than that of the secondary reactance coil, the pass-band attenuation is less than-0.2 db, and the input-output tracking waveform is less than 1 degree.

Preferably, the component materials of the metal oxide magnetic ring comprise:

1) metal oxide or compound material:

ferric oxide; manganese dioxide; zinc oxide; cobalt carbonate; titanium dioxide; silicon dioxide; niobium pentoxide; vanadium pentoxide;

magnesium oxide; sodium molybdate; neodymium oxide; nickel oxide; tin oxide; potassium tantalate; ammonium fluoride; barium sulfate; sodium dodecyl sulfate;

copper oxide; bismuth trioxide; lithium nitrate; alumina;

boron oxide; aluminum dihydrogen phosphate; sodium molybdate; yttrium oxide;

lanthanum oxide; cesium oxide;

2) non-metallic technological auxiliary materials:

ammonia water; polyvinyl alcohol; trimethylolpropane;

zinc stearate; ethyl silicate; tributyl citrate;

fatty acid polyethylene glycol esters; dodecyl dimethyl ammonium carbioxide;

polyacrylamide; potassium permanganate;

two formulas of each component material in the metal oxide magnetic ring are as follows:

preferably, the manufacturing process of the metal oxide magnet ring comprises the following steps:

1: batching process

Preparing the metal oxide or compound material of the metal oxide magnetic ring according to the formula in a molar percentage manner, and placing the prepared main metal oxide or compound material, the non-metal technological auxiliary material and the ionized water in a ball mill for mixing;

2: first ball milling and mixing

Preparing three steel spheres with the hardness of 65-70, namely a large steel sphere, a medium steel sphere and a small steel sphere according to the diameter ratio of 5:3: 2: the weight of the steel ball is the same as that of the material body, and the steel ball is matched with the material body;

grinding operation is carried out in the ball mill by utilizing the three steel spheres in sequence, the first steel sphere rotates at 500-600 circles per minute, and grinding is carried out in the ball mill for 4-16 hours; the second steel ball rotates at 800-; the third steel ball rotates at 2800 circles per minute, and is ground in a ball mill for 4-8 hours;

3: first spray granulation

Putting the slurry subjected to ball milling and mixing into a granulator to realize medium-temperature spray granulation;

4: high temperature pretreatment sintering

Placing the apple-shaped granular material subjected to medium-temperature spray granulation into a temperature-resistant container, and placing the apple-shaped granular material into a kiln to realize the presintering work of the material at 800-900 ℃ under the protection of nitrogen, wherein the sintering time is 2-4 hours;

5: mixing materials by ball milling for the second time

Putting the slurry after high-temperature pretreatment and sintering into a ball mill, and carrying out grinding operation in the ball mill by utilizing the three steel balls in sequence, wherein the first steel ball rotates at 500-600 circles per minute, and is ground for 4-16 hours in the ball mill; the second steel ball rotates at 800-; the third steel ball rotates at 2800 circles per minute, and is ground in a ball mill for 4-8 hours;

6: second spray granulation

Putting the slurry subjected to the second ball milling and mixing into a granulator to realize second medium-temperature spray granulation;

7: press forming

Putting the slurry subjected to secondary medium-temperature spray granulation into a grinding tool of a special oil press to realize blank compression molding, wherein the pressure of the blank subjected to compression molding is 75-85Mpa, and the density of the blank is 3.8-4.8 g/cm;

8: sintering under control of nitrogen protective atmosphere core tunnel kiln implementation temperature zone

The blank is filled in a kiln at the stage T1: sintering under the protection of nitrogen with the content of 98-99%, wherein the sintering curve is T1: the temperature is increased to the stage T2 at 100-150 ℃ per hour, and the kiln is charged at the stage T2 temperature zone 600-720 ℃: the kiln is raised to a stage T3 under the protection of nitrogen with the content of 96-98 percent and sintering; the temperature rising rate of T2-T3 is 90-110 degrees per hour; the furnace is heated to the high temperature interval of 1100 ℃ and 1200 ℃ at the stage of T3 and is kept for 1.5 to 3.5 hours; the temperature rise rate of the kiln is increased to 60-80 ℃ per hour to 1350-1480 ℃ at the stage T4 for heat preservation for 3.5-5 hours; starting a T5 temperature reduction stage under the protection of nitrogen with the content of 99-99.9 percent and sintering, reducing the temperature reduction rate to a T6 temperature region of 650-700 ℃ at 100-150 ℃ per hour, and preserving the heat for 2-3 hours; carrying out quenching treatment;

9: quenching treatment

Heating the sintered magnetic ring to 650-750 ℃, then pulling out the magnetic ring from the furnace and placing the magnetic ring under the protection of nitrogen for 20-90min to realize cooling at room temperature under the nitrogen, wherein the density of the sintered magnetic ring is 4.8-5.8 g/per square centimeter;

10: mechanical grinding

Performing mechanical grinding processing and shaping processing on the edge angles of the quenched magnetic ring or the mold closing seam of the forming grinding tool to finish the appearance processing work of the finished magnetic ring;

11: surface insulation treatment

And heating the finished magnetic ring after mechanical grinding to the temperature of 150-200 ℃, spraying a layer of high-temperature high-insulation epoxy resin powder, putting the magnetic ring into a high-temperature box at 120 ℃, preserving heat for 4 hours for solidification, cooling, taking out the magnetic ring to finish surface insulation treatment, and obtaining the finished metal oxide magnetic ring.

According to the technical scheme provided by the embodiment of the invention, the physical signal isolation and prevention device has higher lightning current resistance, is very suitable for geological and geological severe places such as mountainous areas, watersheds, Gobi, grasslands and the like and high lightning areas, and is an ideal protection device for mobile field operation system equipment.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a block diagram of a physical signal isolation and protection device for a mobile field electronic equipment according to an embodiment of the present invention;

FIG. 2 is a schematic view of a blank magnet ring, a sintered magnet ring and a surface insulation treated magnet ring according to an embodiment of the present invention;

fig. 3 is a schematic wiring diagram of a physical signal isolation protection apparatus according to an embodiment of the present invention.

The magnetic circuit comprises a primary reactance coil 1, a metal oxide magnetic ring 2 and a secondary reactance coil 3.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including 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. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking several specific embodiments as examples in conjunction with the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.

The structure of a physical signal isolation and protection device for a motorized field operation electronic equipment provided by the embodiment of the invention is shown in fig. 1, and comprises the following components: the transformer comprises a metal oxide magnetic ring 2, a primary reactance coil 1 and a secondary reactance coil 3 which are connected with the metal oxide magnetic ring.

The primary reactance coil comprises an input port which receives input of lightning and electromagnetic pulse signals, the secondary reactance coil comprises an output port which outputs signals processed by the physical signal isolation precaution device.

The physical signal isolation and precaution device is used for carrying out physical Joule energy isolation processing on received thunder and lightning and electromagnetic pulse signals and is an isolator with special function parameters.

The internal technology of the metal oxide magnetic ring is based on the core formula and the manufacturing process of high working frequency, high efficiency, anti-saturation and excellent Curie temperature coefficient of a tiny data signal under a specific frequency. The manufacturing process of the metal oxide magnet ring comprises the following steps: the metal oxide magnetic ring meeting the parameter requirements is produced by executing excellent formulation technology and links such as proportioning, ball milling and mixing, granulation, compression molding, high-temperature pretreatment, core sintering, quenching treatment, machining by a mechanical grinding machine, surface insulation treatment, initial permeability test, hysteresis loop test and the like.

Then, after winding the two high-voltage enameled wires along the metal oxide magnetic ring and meeting the set frequency and inductance, connecting two communicated input ends or output ends with the primary reactance coil L1 and the secondary reactance coil L2 respectively, wherein L1 'and L2' are cable ends for connecting the load impedance of the equipment signal port.

And (5) carrying out high-frequency signal test, and using the whole machine after the test is qualified.

The physical signal isolation and protection device has the core characteristics that: in principle, L1 is equal to L2, and if the attenuation is large, L2 can be adjusted, that is, L1 is no higher than L2, and the small-range adjustment is performed under the condition that the pass-band attenuation is less than-0.2 db and the input/output tracking waveform is less than 1 °.

The L1 high frequency inductance is the high frequency inductance of the primary reactance coil, and the L2 high frequency inductance is the high frequency inductance of the secondary reactance coil.

The basic component materials of the metal oxide magnetic ring comprise:

1) main metal oxide (or compound) materials:

ferric oxide; manganese dioxide; zinc oxide; cobalt carbonate; titanium dioxide; silicon dioxide; niobium pentoxide; vanadium pentoxide;

magnesium oxide; sodium molybdate; neodymium oxide; nickel oxide; tin oxide; potassium tantalate; ammonium fluoride; barium sulfate; sodium dodecyl sulfate;

copper oxide; bismuth trioxide; lithium nitrate; alumina;

boron oxide; aluminum dihydrogen phosphate; sodium molybdate; yttrium oxide;

lanthanum oxide; cesium oxide;

2) main non-metallic process aid material (for manufacturing):

ammonia water; polyvinyl alcohol; trimethylolpropane;

zinc stearate; ethyl silicate; tributyl citrate;

fatty acid polyethylene glycol esters; dodecyl dimethyl ammonium carbioxide;

polyacrylamide; potassium permanganate;

two typical formulations of the individual component materials in the above-described metal oxide magnetic rings are as follows:

the manufacturing process of the metal oxide magnet ring comprises the following steps:

1: the batching process comprises the following steps:

the main metal oxide (or compound) material of the metal oxide magnetic ring is configured according to the formula by mole percentage, and usually, an analytically pure material is used. And (3) placing the prepared main metal oxide (or compound) material, the non-metal technological auxiliary material and the ionized water in a ball mill to realize the next step of full mixing.

2: primary ball milling and mixing:

three steel balls with the hardness of 65-70, which are large, medium and small, are arranged according to the diameter ratio of 5:3:2, and the steel balls and the material bodies are in the same weight ratio.

The three steel balls are used for carrying out grinding operation in the ball mill in sequence, the first steel ball rotates at 500-600 circles per minute, and grinding is carried out in the ball mill for 4-16 hours. The second steel ball rotates at 800-. The third steel ball rotates at 2800 circles per minute and is ground in a ball mill for 4-8 hours.

3: primary spray granulation:

and (4) putting the slurry subjected to the primary ball milling and mixing into a granulator to realize primary medium-temperature spray granulation.

4: high-temperature pretreatment sintering:

the apple-shaped granular material after the first medium-temperature spray granulation is put into a temperature-resistant container and put into a kiln to realize the presintering work of the material at 900 ℃ under the protection of nitrogen, and the sintering time is 2-4 hours.

5: secondary ball milling and mixing:

and (3) putting the slurry subjected to high-temperature pretreatment and sintering into a ball mill, and configuring large, medium and small 65-70 hardness steel balls according to the diameter ratio of 5:3:2, wherein the steel balls and the steel balls are in the same weight and are proportioned. 500 and 600 revolutions per minute and 4 to 16 hours of grinding material. The rotation speed of 800-. Rotate at 2800 revolutions per minute, and grind for 4-8 hours.

6: and (3) secondary spray granulation:

and (4) putting the slurry subjected to secondary ball milling and mixing into a granulator to realize secondary medium-temperature spray granulation.

7: and (3) pressing and forming:

and (3) putting the mixture into a prepared grinding tool of a special oil press for secondary medium-temperature spray granulation to realize blank compression molding. Blank pressure: 75-85 MPa. Density of a blank formed by pressing: 3.8-4.8 (grams per square centimeter).

8: sintering under the control of a nitrogen protective atmosphere core tunnel kiln implementation temperature zone:

the blank is filled in a kiln at the stage T1: sintering under the protection of nitrogen with the content of 98-99%, wherein the sintering curve is T1: the temperature is increased to the stage T2 at 100-150 ℃ per hour, and the kiln is charged at the stage T2 temperature (600-720 ℃): the kiln is raised to a stage T3 under the protection of nitrogen with the content of 96-98 percent and sintering; the temperature rising rate of T2-T3 is 90-110 degrees per hour; the furnace is heated to the high temperature interval of 1100 ℃ and 1200 ℃ at the stage of T3 and is kept for 1.5 to 3.5 hours; the temperature rise rate of the kiln is increased to 60-80 ℃ per hour to 1350-1480 ℃ at the stage T4 for heat preservation for 3.5-5 hours; starting a T5 temperature reduction stage under the protection of nitrogen with the content of 99-99.9 percent and sintering, reducing the temperature reduction rate to a T6 temperature region of 650-700 ℃ at 100-150 ℃ per hour, and preserving the heat for 2-3 hours; and carrying out quenching treatment.

9: quenching treatment:

and heating the sintered magnetic ring to 650-750 ℃, quickly pulling out the magnetic ring from the furnace, and placing the magnetic ring under the protection of nitrogen for 20-90min to realize cooling at room temperature under nitrogen. Density of magnetic rings after sintering: 4.8-5.8 (grams per square centimeter).

10: mechanical grinding:

and (3) carrying out mechanical grinding processing and shaping processing on the edge angle (high hardness) of the quenched magnetic ring or the matched die seam of the formed grinding tool to finish the related processing work such as the appearance (chamfering, deburring) of the finished magnetic ring.

11: surface insulation treatment:

heating the finished magnetic ring after mechanical grinding to 150-200 ℃, spraying a layer of high-temperature high-insulation epoxy resin (ultrafine particle) powder, putting the magnetic ring into a 120-DEG high-temperature box, preserving heat for 4 hours, solidifying, cooling and taking out to finish surface insulation treatment. And finally, obtaining the manufactured metal oxide magnetic ring. Fig. 2 is a schematic view of a blank magnetic ring, a sintered magnetic ring and a surface insulation treated magnetic ring according to an embodiment of the present invention.

The basic electrical parameters of the metal oxide magnetic ring are as follows:

1) single turn inductance test at set frequency: according to circuit design parameters

2) And (3) multi-turn inductance testing at a set frequency: according to circuit design parameters

3) And (3) testing initial magnetic permeability: 1.5-6K

4) Curie temperature: 150 ℃ C. and 300 ℃ C

5) Resistivity: 50-200 ohm/m

6) Magnetic saturation magnetic flux density: 200 mT

7) The working frequency is as follows: 0.5-10MHz

8) Commercial power tolerance: 0.1 hour under AC220

9) The inductance of the primary reactance coil L1 is 15 mH-175 mH, and the debugging frequency range is 1 KHz-6 MHz

The inductance of the secondary reactance coil L2 is 15 mH-175 mH, and the debugging frequency range is 1 KHz-6 MHz

Fig. 3 is a schematic wiring diagram of a physical signal isolation and protection device according to an embodiment of the present invention, and a method for testing a primary reactance coil and a secondary reactance coil of the physical signal isolation and protection device includes:

preparing a testing device:

a primary impedance matching RF device; a secondary impedance matching RF device; a frequency-modulated inductive bridge; an analog signal source; a spectrum analyzer; memorizing an oscilloscope; a gain amplifier;

the loss method comprises the following steps:

primary reactance (input) impedance frequency modulation test;

secondary reactance (input) impedance frequency modulation test;

under the primary and secondary impedance matching, a primary is connected in series with an analog signal source; the secondary is connected in series to a memory oscilloscope; under the condition of adjusting an analog signal source, testing the peak value change of the primary and secondary signal levels, and converting the level of the primary and secondary signals into the amount of insertion loss (db).

Under the primary and secondary impedance matching, a primary is connected in series with an analog signal source; a secondary stage is connected into the spectrum analyzer in series; and (3) testing critical loss (db) points and frequency points of the level peak changes of the primary signal and the secondary signal under the condition of adjusting the analog signal source, and implementing further adjustment work.

Under the primary and secondary impedance matching, a primary is connected in series with an analog signal source; the secondary is connected in series to a memory oscilloscope; and (3) testing the electrical phase change following characteristics of the primary and secondary signals under the condition of adjusting the analog signal source, wherein the primary and secondary signals follow the change angle (less than or equal to 1 degree) of the phase.

In summary, the physical signal isolation and prevention device for the motorized field operation electronic equipment of the embodiment of the invention has the isolation measure, so that even if the protector is damaged, the subsequent electronic equipment load is very safe. Can resist typical (multiple waves such as lightning) electromagnetic attack waves: voltage wave 1.2/50 μ S (GJB1389A related clause); the current wave 8/20 muS (GJB6784 and GJB5080 related terms. the lightning current resisting energy is higher, and the device is very suitable for geological and geological condition severe places such as mountainous areas, watersheds, Gobi, grasslands and the like and lightning high-rise areas, and is an ideal protection device for the mobile field operation system equipment.

The physical signal isolation and prevention device for the motorized field operation electronic equipment, provided by the embodiment of the invention, realizes omnibearing physical isolation, thoroughly isolates thunder and electromagnetic pulses, and ensures that the system has very low residual voltage (usually induced voltage, actually induced voltage without current).

The physical signal isolation and prevention device for the motorized field operation electronic equipment, provided by the embodiment of the invention, realizes omnibearing physical isolation, and has smaller attenuation which is usually less than 0.2 db.

The physical signal isolation and prevention device for the motorized field operation electronic equipment, provided by the embodiment of the invention, realizes omnibearing physical isolation and thoroughly isolates Joule energy.

The physical signal isolation and prevention device for the motorized field operation electronic equipment, provided by the embodiment of the invention, realizes omnibearing physical isolation, and the defect of optical coupling isolation is overcome by excellent frequency characteristics.

The physical signal isolation and prevention device for the motorized field electronic equipment of the embodiment of the invention realizes omnibearing physical isolation, is a typical passive device and meets the requirements of the motorized field military equipment.

The physical signal isolation and prevention device for the motorized field operation electronic equipment, provided by the embodiment of the invention, realizes omnibearing physical isolation, directly bears alternating current 220V voltage (test) voltage, and meets the alternating current carrying test requirement required by an IEEE standard communication protocol.

Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (5)

1. A physical signal isolation precaution device for motorized field electronic equipment, comprising: the primary reactance coil comprises an input port which receives input of thunder and lightning and electromagnetic pulse signals, and the secondary reactance coil comprises an output port which outputs signals processed by the physical signal isolation precaution device;

the physical signal isolation and precaution device is used for carrying out physical Joule energy isolation processing on the received thunder and electromagnetic pulse signals.

2. The apparatus as claimed in claim 1, wherein the primary and secondary reactance coils are two windings wound in the same direction along the magnetic ring.

3. The apparatus of claim 2, wherein a high frequency inductance of the primary reactance coil is equal to a high frequency inductance of the secondary reactance coil; or the high-frequency inductance of the primary reactance coil is not more than that of the secondary reactance coil, the pass-band attenuation is less than-0.2 db, and the input-output tracking waveform is less than 1 degree.

4. The device as claimed in claim 1 or 2, wherein the component materials of the metal oxide magnetic ring comprise:

1) metal oxide or compound material:

ferric oxide; manganese dioxide; zinc oxide; cobalt carbonate; titanium dioxide; silicon dioxide; niobium pentoxide; vanadium pentoxide;

magnesium oxide; sodium molybdate; neodymium oxide; nickel oxide; tin oxide; potassium tantalate; ammonium fluoride; barium sulfate; sodium dodecyl sulfate;

copper oxide; bismuth trioxide; lithium nitrate; alumina;

boron oxide; aluminum dihydrogen phosphate; sodium molybdate; yttrium oxide;

lanthanum oxide; cesium oxide;

2) non-metallic technological auxiliary materials:

ammonia water; polyvinyl alcohol; trimethylolpropane;

zinc stearate; ethyl silicate; tributyl citrate;

fatty acid polyethylene glycol esters; dodecyl dimethyl ammonium carbioxide;

polyacrylamide; potassium permanganate;

two formulas of each component material in the metal oxide magnetic ring are as follows:

5. the apparatus as claimed in claim 4, wherein the process of manufacturing the metal oxide magnet ring comprises:

1: batching process

Preparing the metal oxide or compound material of the metal oxide magnetic ring according to the formula in a molar percentage manner, and placing the prepared main metal oxide or compound material, the non-metal technological auxiliary material and the ionized water in a ball mill for mixing;

2: first ball milling and mixing

Preparing three steel spheres with the hardness of 65-70, namely a large steel sphere, a medium steel sphere and a small steel sphere according to the diameter ratio of 5:3: 2: the weight of the steel ball is the same as that of the material body, and the steel ball is matched with the material body;

grinding operation is carried out in the ball mill by utilizing the three steel spheres in sequence, the first steel sphere rotates at 500-600 circles per minute, and grinding is carried out in the ball mill for 4-16 hours; the second steel ball rotates at 800-; the third steel ball rotates at 2800 circles per minute, and is ground in a ball mill for 4-8 hours;

3: first spray granulation

Putting the slurry subjected to ball milling and mixing into a granulator to realize medium-temperature spray granulation;

4: high temperature pretreatment sintering

Placing the apple-shaped granular material subjected to medium-temperature spray granulation into a temperature-resistant container, and placing the apple-shaped granular material into a kiln to realize the presintering work of the material at 800-900 ℃ under the protection of nitrogen, wherein the sintering time is 2-4 hours;

5: mixing materials by ball milling for the second time

Putting the slurry after high-temperature pretreatment and sintering into a ball mill, and carrying out grinding operation in the ball mill by utilizing the three steel balls in sequence, wherein the first steel ball rotates at 500-600 circles per minute, and is ground for 4-16 hours in the ball mill; the second steel ball rotates at 800-; the third steel ball rotates at 2800 circles per minute, and is ground in a ball mill for 4-8 hours;

6: second spray granulation

Putting the slurry subjected to the second ball milling and mixing into a granulator to realize second medium-temperature spray granulation;

7: press forming

Putting the slurry subjected to secondary medium-temperature spray granulation into a grinding tool of a special oil press to realize blank compression molding, wherein the pressure of the blank subjected to compression molding is 75-85Mpa, and the density of the blank is 3.8-4.8 g/cm;

8: sintering under control of nitrogen protective atmosphere core tunnel kiln implementation temperature zone

The blank is filled in a kiln at the stage T1: sintering under the protection of nitrogen with the content of 98-99%, wherein the sintering curve is T1: the temperature is increased to the stage T2 at 100-150 ℃ per hour, and the kiln is charged at the stage T2 temperature zone 600-720 ℃: the kiln is raised to a stage T3 under the protection of nitrogen with the content of 96-98 percent and sintering; the temperature rising rate of T2-T3 is 90-110 degrees per hour; the furnace is heated to the high temperature interval of 1100 ℃ and 1200 ℃ at the stage of T3 and is kept for 1.5 to 3.5 hours; the temperature rise rate of the kiln is increased to 60-80 ℃ per hour to 1350-1480 ℃ at the stage T4 for heat preservation for 3.5-5 hours; starting a T5 temperature reduction stage under the protection of nitrogen with the content of 99-99.9 percent and sintering, reducing the temperature reduction rate to a T6 temperature region of 650-700 ℃ at 100-150 ℃ per hour, and preserving the heat for 2-3 hours; carrying out quenching treatment;

9: quenching treatment

Heating the sintered magnetic ring to 650-750 ℃, then pulling out the magnetic ring from the furnace and placing the magnetic ring under the protection of nitrogen for 20-90min to realize cooling at room temperature under the nitrogen, wherein the density of the sintered magnetic ring is 4.8-5.8 g/per square centimeter;

10: mechanical grinding

Performing mechanical grinding processing and shaping processing on the edge angles of the quenched magnetic ring or the mold closing seam of the forming grinding tool to finish the appearance processing work of the finished magnetic ring;

11: surface insulation treatment

And heating the finished magnetic ring after mechanical grinding to the temperature of 150-200 ℃, spraying a layer of high-temperature high-insulation epoxy resin powder, putting the magnetic ring into a high-temperature box at 120 ℃, preserving heat for 4 hours for solidification, cooling, taking out the magnetic ring to finish surface insulation treatment, and obtaining the finished metal oxide magnetic ring.

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