41 results about "Nuclear electromagnetic pulse" patented technology

The invention relates to an electric connector resisting nuclear electromagnetic pulses, comprising a socket and a plug. The socket is formed by sequentially connecting a socket outer shell, a plastic closing ring, a lower base, a grommet, a bracing spring ring, a contact pin, a top base, an interface sealing gasket and a sealing ring; the plug is formed by sequentially connecting a threaded sleeve, an elastic gasket, a static ratchet wheel, a movable ratchet wheel, an end outer shell, a plastic closing ring, a lower base, a jack, a grommet, a bracing spring ring and an end top base; and the socket outer shell and the end outer shell of the electric connector are made of permeable magnetic material while conductive material is coated on the surface, a shielding spring leaf is axially arranged on the excircle of the end outer shell, and conductive rubber gaskets are arranged on abutting end surfaces so as to form a full-closed shield. The electric connector has excellent conductivity, effectively shields electromagnetic interference caused by an external electrical field and magnetic variation and enhances the capability of resisting strong electromagnetic pulses caused by nuclear bursts.

The invention provides an electromagnetic pulse composite effect test method and system in a space environment. The method and system are used for accurately obtaining a high-power electromagnetic pulse composite effect threshold of a target in the space environment. A space environment simulation means (having environmental capabilities such as space particle environment simulation, space high-low temperature environment simulation and space vacuum environment simulation) acts on an object, so that the object is in a space environment condition; meanwhile, a high-power electromagnetic pulse signal (which can be one or a combination of more of narrow-band high-power microwave HPM, ultra wide band electromagnetic pulse UWB, broadband electromagnetic pulse wideband, lightning electromagneticpulse LEMP, nuclear electromagnetic pulse NEMP and electrostatic discharge ESD) is loaded in an irradiation or injection mode; finally, online monitoring is conducted on the test object through detection equipment, a high-power electromagnetic pulse composite effect threshold value in the space environment is obtained, and then threshold value data and rules are accurately obtained.

The invention relates to the technical field of electromagnetic pulses. The invention discloses a strong electromagnetic pulse protection device of a vehicle electric control system, which comprises apower interface protection circuit, an engine interface protection circuit and an OEM interface protection circuit which are isolated from one another, and the power interface protection circuit comprises a transient suppression circuit, a filter circuit and a delay circuit which are cascaded in sequence; the transient suppression circuit comprises a gas discharge tube and a piezoresistor and isused for discharging and amplifying current; the filter circuit and the delay circuit suppress common-mode interference based on the LC circuit and delay pulse rise time at the same time. According tothe invention, a protection method for cutting off a coupling channel of the strong electromagnetic pulse to the electric control unit interface is adopted, so that the protection efficiency of the strong electromagnetic pulse to the electric control system is maximized, and the damage of nuclear electromagnetic pulse, broadband strong electromagnetic pulse and narrowband strong electromagnetic pulse to the vehicle electric control system can be effectively prevented.

The invention relates to a nuclear electromagnetic pulse resisting cable which structurally comprises a conductor, an insulator, a separated shield part, a combined shield part and a protection sleeve. The high-temperature-resisting fluoroplastic insulator extruded by high-temperature extruding equipment is arranged at the periphery of the conductor using a tin-plated round copper stranded wire or a sliver-plate round copper stranded wire, the separated shield part woven by high-weaving tin-plated round copper wires is arranged at the periphery of the high-temperature fluoroplastic insulator, the combined shield part formed by a control line and a data line which are stranded by a cabling machine is positioned at the periphery of the separated shield part, and the low-temperature-resisting elastic protection sleeve extruded by a normal-temperature extruding machine is positioned outs of the combined shield part. Manufacturing process uses a combined method of lapped shield and braided shield and primarily uses 300T conductive cloth lapping materials to substitute metal lapping materials. The nuclear electromagnetic pulse resisting cable has the advantages of resisting to nuclear electromagnetic pulse, being soft, being high in abrasion resistance, preventing mould, resisting to moist, resisting to acid-base corrosion, being capable of keep good data transmission performance in complex electromagnetic environment, being applied to a hydraulic information control system and having the information transmission function in special portions of the hydraulic information control system.

The invention discloses an ultrasoft control cable resistant to nuclear electromagnetic pulses. The ultrasoft control cable comprises conductors, each conductor is wrapped by an insulating layer to form an insulating wire core, the multiple insulating wire cores and a filled core formed by intertwisting micropore polytetrafluoroethylene belts are intertwisted together to form a cable core, a composite metal shielding layer is woven outside the cable core and sequentially comprises a copper-nickel alloy woven belt wrapping layer, a tinned copper braid, a polytetrafluoroethylene micropore belt wrapping layer, an iron-nickel alloy belt wrapping layer and a nickel plated copper wire braid, and the composite metal shielding layer is wrapped by an outer sheath. The ultrasoft control cable is small in outer diameter, light in weight, resistant to high and low temperature, and resistant to flame and weather, the outer diameter and the weight of the cable are effectively reduced, the shielding effectiveness can be improved to 82.9 dB from original 70 dB, and the softness of the cable is improved.

The invention relates to a nuclear electromagnetic pulse resisting electrical connector which comprises a jack A, a jack B, a jack C, a lower insulation body, a pressure ring, an electric field shielding sleeve, a magnetic field shielding sleeve, an upper insulation body, a shell, a locking nut, an insulation sleeve A, a locking sleeve, an insulation sleeve B, an insulation sleeve C, sealing rings A and a sealing ring B. The plug end of a socket is closed by a metal shielding layer 17, circular holes are arranged on the metal shielding layer and are internally provided with the insulation sleeve A, the insulation sleeve B and the insulation sleeve C, silicon rubber is filled between the upper insulation body and the lower insulation body which are fixed in the shell, a flange disc of the shell is provided with an annular groove and the sealing ring B, and the sealing rings A are arranged at the plug parts of the jacks and the socket. The invention has strong nuclear electromagnetic pulse resistance capacity and is not easy to damage.

The invention discloses a horizontal polarization nuclear electromagnetic pulse simulator antenna. The horizontal polarization nuclear electromagnetic pulse simulator antenna comprises an arc-shaped cage type line radiation dipole and further comprises two conical feed transition sections. The cage type line radiation dipole is composed of two arc-shaped cage type line radiation arms which are symmetrically arranged. Each cage type line radiation arm comprises a plurality of circular-ring-shaped supports and a plurality of radiation cables, wherein the circular-ring-shaped supports are sequentially fixed to form an arc-shaped framework of the cage type line radiation arm, and the radiation cables are evenly fixed along the outer edge of the framework. The two conical feed transmission sections are arranged between the two cage type line radiation arms and are symmetrically arranged. The bottom faces of the conical feed transition sections are fixedly connected with one ends of the inner sides of the two cage type line radiation arms respectively. The vertexes of the conical feed transition sections do not make contact. By means of the horizontal polarization nuclear electromagnetic pulse simulator antenna, radiation antennas of large nuclear electromagnetic pulse simulators can have better direction characteristics, and the pulse field intensity and the field uniformity of test areas are improved.

The invention provides an anti-nuclear electromagnetic pulse shielding socket. The socket consists of two parts of a multi-tap socket and an anti-nuclear module which are tightly connected by a turnbuckle; the anti-nuclear electromagnetic pulse shielding socket is mainly provided with a transfer jack, a contact pin, a ground plate, a filter component, a transient voltage suppression diode, a sealant and an insulator, and the socket joint end of a shell is provided with a metal shielding layer. The metal shielding layer is provided with a series of round holes to form a waveguide holes array; the shell is made of metal with high magnetoconductivity and effectively, therefore the shielding effect on the powerful electromagnetism is effectively improved. The transient voltage suppression diode arranged in the anti-nuclear module part effectively protects the circuit connected by a contact member against damaging when impacted by the nuclear electromagnetic pulse; the transient voltage suppression diode and the filter component are sealed inside the socket by the sealant, thereby preventing the intrusion of the hazardous substance and preventing the two components from becoming invalid.

The invention discloses a data-based strong electromagnetic pulse electromagnetic coupling modeling method, which is suitable for the requirements of transient electromagnetic field electromagnetic coupling modeling with the characteristics of instantaneity, broadband, high field strength and wide action range, such as electro-static discharge (ESD) coupling modeling, nuclear electromagnetic pulse (NEMP) coupling modeling, lightning electromagnetic pulse (LEMP) coupling modeling, high-power microwave (HPM) coupling modeling, ultra wide band (UWB) coupling modeling and the like. The data-based strong electromagnetic pulse electromagnetic coupling modeling method is characterized in that transient modeling is performed by utilizing observable experimental data before and after an electromagnetic coupling process; input data are strong electromagnetic pulse signals (ESD, NEMP, LEMP, HPM and UWB) starting to entering equipment under test (EUT) in the manner of irradiation; and the input and the output of an electromagnetic coupling process are synchronously tested time sequences. A second-order or high-order Volterra kernel function is adopted by a model structure so as to meet different requirements of nonlinear degree system modeling. A frequency domain identification algorithm is high-order spectral estimation. A brand-new path is opened to solving the complicated strong electromagnetic pulse electromagnetic coupling modeling problem by the method.

The invention discloses an ultra-low-frequency nuclear electromagnetic pulse receiving antenna which comprises an antenna cover composed of a shell and a base, a signal output interface and a power supply input interface are arranged on the base, a circuit board installation box is arranged at the top of the base, and a signal conditioning circuit is installed in the circuit board installation box. A signal output end electrically connected with the signal output interface and a power supply input end electrically connected with the power supply input interface are arranged on the signal conditioning circuit, a magnetic field receiving antenna is installed at the top of the circuit board installation box, and an electric field receiving antenna is installed at the top of the magnetic field receiving antenna. According to the ultra-low-frequency nuclear electromagnetic pulse receiving antenna disclosed by the invention, various defects in the prior art are overcome, acquisition and receiving of ultra-low-frequency nuclear electromagnetic pulse waveform signals can be better realized, the sensitivity, the dynamic range and the anti-interference performance of the antenna are improved, and meanwhile, the miniaturization and the usability of the antenna are ensured.

The invention relates to a cathode protection device and a protection method thereof. The cathode protection device comprises a cathode protection constant potential rectifier, a positive power electronic switch set, a negative power electronic switch set, a current transformer and a computer controller, wherein the positive power electronic switch set, the negative power electronic switch set, the current transformer and the computer controller are serious into a protected electric appliance loop; and the computer controller receives sampling information coming from the current transformer, judges the working mode of the cathode protection constant potential rectifier, further controls opening and closing of the positive power electronic switch set and the negative power electronic switch set, transmits a failure reset command to a latch in a timing mode according to the preset time, and clears up a second-stage failure latch signal. The problem that grounding apparatus, like the cathode protection constant potential rectifier, which are connected into a pipe are possibly burnt under the conditions of geomagnetic storms, direct current transmission systems, nuclear electromagnetic pulses and the like is solved.

The invention discloses an integrated nuclear electromagnetic pulse resistant signal filter. The filter comprises LC filter bodies and RV bleeders. The filter is composed of a plurality of modules by parallel connection. In each module, each RV bleeder is composed of an RV varistor and a feedthru capacitor by parallel connection and connected to output and input ends of the LC filter bodies, the LC filter bodies and the RV bleeders are welded and fixed on a printed circuit board (PCB) by an insulation pouring structure, and a certain amount of the modules are integrated through a case slot as required. Survival and information countermeasure capacities of communication centers during wartime can be improved through the integrated nuclear electromagnetic pulse resistant signal filter.

The invention relates to an ultrahigh-field-intensity broadband electromagnetic pulse weapon and a broadband electromagnetic pulse generation method. The ultrahigh-field-intensity broadband electromagnetic pulse weapon comprises a shell, a grain, an igniter and a nozzle assembly, wherein the nozzle assembly is fixed to one end of the shell, a closed cavity is formed by the nozzle assembly and theshell, the grain is located in the closed cavity and fixed to the other end of the shell, the igniter is fixed to the shell, and an ignition cable switch of the igniter ignites the grain. The ultrahigh-field-intensity broadband electromagnetic pulse weapon disclosed by the invention solves the technical problems that an existing non-nuclear electromagnetic pulse weapon is short in action distance,complex in structure and limited in various properties, and the weapon provided by the invention can generate broadband and ultrahigh-field-intensity electromagnetic pulses, is simple in structure, does not need electric energy, and has the coverage range of dozens of kilometers or even higher.

The invention relates to a nuclear explosion electromagnetic pulse signal source simulation device. The signal generation unit of the present invention is realized by a digital circuit, that is, DSP+DDS is used to form the main circuit of the signal source simulation device, and the setting and control of the DDS by the DSP are realized through the SPI interface. The crystal oscillator is the DSP clock input, and the DSP system clock output signal is used as the DDS clock input. The DSP sets the DDS internal PLL through SPI communication to control the DDS system clock frequency, and then can achieve 300MHz~30MHz frequency conversion output. DDS can obtain a maximum output signal of 400MHz. The frequency conversion period is adjustable, and the minimum frequency conversion period is 4ns; the amplitude is adjustable, which is suitable for simulating the electromagnetic pulse signal of the nuclear explosion electromagnetic pulse in the atmosphere and the longitudinal transmission through the ionosphere, especially for the simulation of the electromagnetic pulse signal of the nuclear explosion in the satellite detection nuclear explosion signal test , is of great significance to the national defense construction of our country.

The invention discloses a light nuclear electromagnetic pulse resistant cable for aerospace and a production process thereof, and particularly relates to the field of cables. The light nuclear electromagnetic pulse resistant cable for aerospace comprises a cable core, wherein the cable core comprises four nickel-plated copper alloy conductors and five basalt fiber filling bodies, the outer walls of the four nickel-plated copper alloy conductors are each coated with a PI/FEP insulating film, the outer wall of the cable core is provided with a PTFE microporous membrane isolation layer, the outer wall of the PTFE microporous membrane isolation layer is provided with a metal-plated carbon fiber braided sleeve, the outer wall of the metal-plated carbon fiber is provided with a carbon fiber filled PTFE semi-conductive microporous membrane wrapping tape shielding layer, and a carbon fiber plated metal copper foil wire braided sleeve is arranged on the outer wall of the carbon fiber filled PTFE semi-conductive microporous membrane wrapping tape shielding layer. According to the light nuclear electromagnetic pulse resistant cable for aerospace and the production process thereof, the nuclear electromagnetic pulse resistant performance, the flexibility and the radiation resistance of the cable for aerospace can be effectively improved, and the cable has excellent shielding performance, is small in outer diameter and light in weight and can be widely applied to the field of aerospace.

A short-wave radio station high-altitude nuclear electromagnetic pulse protection device belongs to the technical field of electromagnetic pulse protection, and the invention particularly relates to a short-wave radio station high-altitude nuclear electromagnetic pulse protection device. The invention provides a short-wave radio station high-altitude nuclear electromagnetic pulse protection device with good protective effect on strong electromagnetic pulse. The short-wave radio station high-altitude nuclear electromagnetic pulse protection device comprises a gas discharge tube GDT1. The short-wave radio station high-altitude nuclear electromagnetic pulse protection device has the structural features that one end of the GDT1 is respectively connected with one end of an antenna and one end of a resistor R5, the other end of the GDT1 is grounded, and the other end of the R5 is respectively connected with one end of a gas discharge tube GDT2, a toggle terminal of a controlled end of a relay, and one end of a capacitor C1; the other end of the GDT2 is connected with one end of a first voltage dependent resistor, the other end of the first voltage dependent resistor is connected with one end of a second voltage dependent resistor, the other end of the second voltage dependent resistor is connected with one end of a third voltage dependent resistor, and the other end of the third voltage dependent resistor is grounded.

A three-stage surge protection device protects against complex, time-variant voltage transients, including those resulting from a high-altitude nuclear electromagnetic pulse or a solar coronal mass ejection. The device relies on interaction between a snubbing low-pass filter, a transient voltage suppressor, and an electronic crowbar circuit. The low-pass filter significantly lowers the let-through voltage of the device for short-duration pulses, and helps to spread the energy to more effectively utilize the transient voltage suppressor. The transient voltage suppressor limits the let-through voltage to a clamping level and provides indication to the crowbar circuit when it is no longer able to do so. Once the clamping level is no longer able to be maintained, the crowbar circuit draws enough current to trip an upstream protective device, such as a breaker or fuse.

The invention belongs to the electromagnetic field and microwave technological field and relates to an electrodeless passive pulsed electric field detector. The bias of the detector can be set, the probe of the detector is passive, the probe can be an electrodeless probe, and the problem of the application of the detector to environments such as nuclear electromagnetic pulses, lightning electromagnetic pulses and ultra-wideband environments can be solved. The structure of the detector comprises a light source and a front end probe; the light source is a tunable polarization narrow-spectrum light source; the front end probe comprises a tube shell and a crystal; the tube shell and the crystal are both cuboid; the crystal is encapsulated in the tube shell; a waveguide is prepared on the surface of the crystal by means of titanium diffusion, wherein the waveguide can be an x-cut y-transmission waveguide, a z-cut y-transmission waveguide, a y-cut x-transmission waveguide, or a z-cut x-transmission waveguide; two ends of the waveguide on the crystal are respectively used as an optical signal input end and an optical signal output end; the input end is coupled with a polarization-maintaining optical fiber; the polarization direction of input light is aligned with an o-optical main axis and an e-optical main axis in the direction of 45 degrees; the output end is at first in -45-degreecoupling with an analyzer, and then is in aligned coupling with the slow axis of the polarization-maintaining optical fiber.

The invention relates to a strong electromagnetic pulse resistance reinforcing method for a nuclear security system and a nuclear security system. The method comprises the following steps of: 1) performing shielding with a structure box body; 2) performing shielding with optical isolation signals; 3) performing equipment internal processing; 4) performing power supply improvement, and 5) improving the circuit of a circuit board. The nuclear security system comprises an access control host, an alarm center end, an alarm extension set, a switch, a nuclear shield platform, an infrared detector, a microwave detector, a camera, a door lock and a button. According to the strong electromagnetic pulse resistance reinforcing method of the nuclear security system and the nuclear security system, the anti-interference capability of nuclear electromagnetic pulse resistance of the nuclear security system can be effectively improved; and the nuclear security system can still work normally when high-altitude explosion occurs.

The invention discloses a piezoelectric type nuclear electromagnetic pulse isolation device. The device comprises a power supply, a high-sensitivity piezoelectric ceramic, a gear ring, an iron core, aspiral line probe, a permanent magnet, a high-sensitivity strain gage, a divider resistor, a ground wire and a signal transmission wire, wherein the iron core is arranged at the center of the spiralline probe; the lower end of the iron core is connected with the permanent magnet; the periphery of the gear ring is opposite to the upper end of the iron core at the center of the spiral line probe;a gap exists between the gear ring and the spiral line probe; the upper and lower ends of the high-sensitivity piezoelectric ceramic are respectively connected with two leading-out terminals of the spiral line probe; the high-sensitivity strain gage is arranged on the side surface of the high-sensitivity piezoelectric ceramic; one end of the high-sensitivity strain gage is connected with the powersupply and the other end of the high-sensitivity strain gage is divided into two paths; and one path is connected with the signal transmission wire and the other path is connected with the ground wire through the divider resistor. The piezoelectric type nuclear electromagnetic pulse isolation device is capable of realizing the transmission of sensing signals of magneto-electric sensors and the isolation of high-voltage signals of nuclear electromagnetic pulses, so as to isolate interferences, to control circuits, of the nuclear electromagnetic pulse.

The invention relates to a flexible anti-nuclear reinforced cable and a manufacturing method. The flexible anti-nuclear reinforced cable comprises a central skeleton, cable core units, a polyester wrapping layer, a metal shielding layer and a polyurethane sheath layer from inside to outside, and is characterized in that the central skeleton is arranged at the central position of the cable, is madeof a thermoplastic elastomer material and isolates the cable core units in the wrapping space of the wrapping layer. The flexible anti-nuclear reinforced cable solves the problems that an existing anti-nuclear electromagnetic pulse cable is poor in flexibility, a cable conductor is broken and disengaged due to the fact that the bending portion of the cable is uneven in stress, and the using requirement for the flexible anti-nuclear electromagnetic pulse cable in a nuclear weapon cannot be met.