133 results about "Strong pulse" patented technology

A low arc AC contactor comprises an on/off mechanism electromagnetic-controlled contact, a pulse power source generating circuit, a low arc trigger generating circuit, and a multifunctional fault-detecting circuit. The contactor converts an instantaneous strong current into strong pulse magnetic field energy to actuate contacts of mechanical portion of the contactor, so that the power source load is on or off. Each of the actuating process will be controlled by the electric circuit to perform at the lowest potential of AC voltage for reducing arc's destructive power. Moreover, the contactor uses photoelectric coupling circuits, in which it can be controlled by external low voltage signal commands, as well as providing protection from overload, phase loss, short circuit, and leakage current.

A modelocked fiber laser is designed to have strong pulse-shaping based on spectral filtering of a highly-chirped pulse in the laser cavity. The laser generates femtosecond pulses without a dispersive delay line or anomalous dispersion in the cavity.

The invention discloses a dielectric barrier corona discharge reactor which comprises an outer electrode, an inner electrode and a dielectric barrier layer positioned between the outer electrode and the inner electrode, wherein the outer electrode is connected with a power supply, and the inner electrode is grounded. The dielectric barrier corona discharge reactor can generate and transmit more charges under same external voltage and discharge spatial clearance due to corona ionization effect and simultaneously output higher discharge power. The dielectric barrier corona discharge reactor can obtain stronger pulse voltage and current during discharge and enable energy during the discharge to be more centralized.

The invention belongs to the technical field of laser, in particular to a device for generating high signal-to-noise ratio optical pulse. The device mainly consists of a multi-level chirped pulse amplification part and a pulse frequency-doubling purification part, wherein each level of chirped pulse amplification system respectively operates in different wavelengths (namely fundamental wave and harmonic wave); and non-linear purification of the pulse and conversion matching of the wavelengths can be realized through the frequency-doubling process between the fundamental wave and the harmonic wave, so as to obtain the high signal-to-noise ratio pulse. The device has the advantages of strong pulse purification ability, high overall efficiency and favorable expansibility performance towards a heavy calibre high energy state, and can be used for constructing laser systems of the petawatt magnitude.

The invention provides a pulse trigger. A medicine box is a hollow chamber; a thermal insulating layer covers the internal wall of the chamber; the chamber is full of ignition powder; two ends of the medicine box are respectively connected with an end cap and a connecting chamber assembly; the middle of the end cap is fixedly connected with an ignition tube; the connecting chamber is a through hollow chamber; the thermal insulating layer covers the internal wall of the chamber; a separation plate is arranged and positioned inside the connecting chamber through a supporting ring; the separation plate is provided with a plurality of through holes; a communicating part of the medicine box and the connecting chamber positions a sealing piston assembly through a stepped hole; the sealing piston assembly comprises a sealing piston and a thermal insulating layer; the sealing piston seals the communicating position of the medicine box and the connecting chamber and can be separated under combustion pressure of ignition powder; the medicine box and the connecting chamber are guaranteed to be communicated; the thermal insulating layer covers the sealing piston. The pulse trigger can increase the working pressure strong pulse by 0 to 20% in 0 to 5millisecond short time at any time during working of and engine and saves target range test costs.

A quantum cryptography communication apparatus performs quantum cryptography communication between a transmitter and a receiver. The quantum cryptography communication apparatus includes first communicating unit transmitting and receiving a communication signal including relatively strong pulse light between the transmitter and the receiver, and second communicating unit transmitting and receiving a relatively weak quantum cryptography signal between the transmitter and the receiver in a period in which the communication signal is off and the attitude axis for the receiver can be adjusted to that for the transmitter by the second communicating unit.

The invention discloses a pulse oscillation device constructed and designed based on a mathematical model, and relates to the technical field of pulse oscillators. The pulse oscillation device comprises a shell, a jet flow inlet, a first discrete vortex, a jet flow outlet, a second discrete vortex, a first air steam bag, a second air steam bag, first air bubbles and second air bubbles, and the jetflow inlet is fixedly formed in the top of the shell. According to the pulse oscillation device constructed and designed based on the mathematical model, the jet flow impact performance is high, thepulse signal mutability is high, the amplitude change is stable, the improvement on jet flow impact performance is facilitated, the characteristic of the stable pulse effect is achieved, an internal system is stable, large-scale vortexes existing in an oscillation cavity and the pulse pressure oscillation effect can cause vortex cavitation and oscillation cavitation formation in a self-oscillationcavity, and therefore the cavitation effect of the jet flow outlet is enhanced, the cavitation effect of the jet flow is effectively promoted, meanwhile, transmission and superposition of water pressure signals are facilitated, and the cracking problem is not prone to occurring.

The invention discloses a strong-pulse micro-wastewater emission and purification system which comprises a water inlet tee joint (1), a front filter group, a booster pump (13), a reverse osmosis membrane filter (15), and a rear active carbon filter (19) which are sequentially connected through a pipeline, wherein an outlet of the rear active carbon filter is connected with a water outlet (20) through a high-pressure switch (18), an outlet of the reverse osmosis membrane filter is connected with a water storage pressure barrel (4) through a pipeline, a wastewater discharge pipeline is arranged at an outlet of the reverse osmosis membrane filter, a pulse electromagnetic valve (14) is arranged on the pipeline, and after the water storage pressure barrel reflows trace pure water to the front end of the reverse osmosis membrane filter (15) through a pipeline and a one-way valve (22) and after the trace pure water is produced, a reverse osmosis membrane is soaked. According to the strong-pulse micro-wastewater emission and purification system, through two measures of rapid instant pulse pollution discharging and washing of the reverse osmosis membrane and pure water reflowing and washing and soaking and protecting of the reverse osmosis membrane, the raw water utilization rate is greatly increased to above 75 percent.

The invention discloses a recognition method of a strong pulse signal based on a slope and amplitude difference value threshold. The recognition method comprises the following steps: obtaining an acoustic signal through an acoustic sensor and converting the acoustic signal into an electrical signal to be sent to a preprocessing circuit so as to be amplified, filtered, detected, sampled and smoothed, finally obtaining a smooth curve; obtaining the slope between various points and adjacent points which form the curve by aiming at the smooth curve, and calculating slope difference values of the adjacent points, selecting the point of which the difference value of the slope with that of adjacent sampling points on two sides is greater than a preset threshold as a mutation point; taking the slope between the mutation point and the former adjacent sampling point of the mutation point as an initial value, calculating the slope difference value between the slope of the mutation point on the smooth curve and the follow-up point of the mutation point and the initial value, and an amplitude difference value between the mutation point and the follow-up point, if the amplitude difference value and the slope difference value of the follow-up points and the mutation points of set number are both greater than a set threshold value, judging the signal to be the strong pulse signal. The recognition method of the strong pulse signal based on the slope and amplitude difference value threshold disclosed by the invention can recognize the strong pulse signal.

The invention discloses a strong pulse current orientated solidification grain ultra-fining method and a strong pulse current orientated solidification grain ultra-fining device. The device comprises a heating controller, a drawing transmission mechanism, a supporting body, an orientated solidification furnace, a cantilever table, a fixing bracket and a pulse power source. The heating controller is connected with a resistance wire of the orientated solidification furnace through a lead and a thermocouple; the thermocouple is inserted into an inner wall of the orientated solidification furnace; and the power-on and power-off states by heating an electrically melt alundum tube in an inner ring of the orientated solidification furnace are adjusted in real time according to an inner temperature value of the orientated solidification furnace, which is measured and transmitted by the thermocouple in real time so as to fulfill the aim of controlling the internal temperature of the orientated solidification furnace. The pulse power source is connected with hot and cold end electrodes through leads, and the control of the pulse current is finished according to a electric pulse parameter regulating command. A cylindrical solidification structure with fine grain dimension and uniform orientation is obtained on the premise of simple and convenient equipment, effect is obvious, the harm of electromagnetic radiation can be reduced and the environmental burden is lightened.

The invention discloses a method and a device for forming and assembling a microscale part, and is applied to the forming and the assembly of micro-precision parts such as integrated circuits and microelectronic products. According to the method, flat top type strong pulse laser illuminates on a restraint layer to form pressure wave to impact a target and make the target locally and rapidly expanded; a micro-blanking material flying at a high speed is obtained under the action of a cutting mould; the micro-blanking material flies at a high speed and then hits against a part to be assembled, so the surface appearance of the part to be assembled is copied and microscale forming is formed; and the speed of the formed microscale part is reduced to zero, the formed microscale part is attached onto the upper surface of the part and then assembled, and the positioning and the installation of the microscale part are performed, so the integration of the forming and the assembly of the microscale part is realized. By the method, the forming and the assembly of the microscale part can be realized simultaneously; therefore, the method is a modern micro-device making method which integrates the processing and the assembly of the microscale part, and has the processing characteristics of high flexibility and high efficiency. Moreover, rapid industrialized production in a large scale is easyto realize.

The invention discloses pulse discharge auxiliary die-casting device and method, relates to discharge plasma die-casting device and method, belongs to the field of die-casting technologies and aims to solve the problems that the existing die-casting technology is high in energy consumption, preparation material is low in density, complex parts cannot be manufactured due to uneven pulse discharge temperature and pressure in the pulse discharge sintering technology. The pulse discharge auxiliary die-casting device comprises a feed rod, a hopper cover, a hopper, a graphite die, a graphite electrode, an auxiliary die, a die and a guide tube. The graphite die, the graphite electrode, a copper electrode and a graphite press head are added on the basis of conventional die-casting for pulse discharge, raw material applies machining residual metal scrap or waste metal fragments, material is placed in the hopper and pushed into the graphite die to be subjected to vacuum pumping, strong pulse is applied to two ends of the material to melt the material, and molten metal is extruded into a die cavity for forming. The pulse discharge auxiliary die-casting device and method are mainly applied to the die-casting technical fields, and waste raw material is effectively utilized to achieve environment friendliness.

The invention relates to a bremsstrahlung reflection triode for generating strong pulse hard X rays. The problems that the gap potentials of two cathodes and anodes of an existing bremsstrahlung reflection triode are inconsistent, and a radiation field cannot be fully utilized are solved. The triode comprises a reflection triode cavity, an anode base, an anode, cathodes, transverse cover plates, aforward cover plate, an insulation plate fixing nut, an insulation plate transition piece and an insulation plate. The part, connected with the insulation plate, of the reflection triode cavity is acylinder, the part, away from the insulation plate, of the reflection triode cavity is transited into a closed cavity, and two parallel flat plates are arranged on the opposite surfaces of the closedcavity; the two cathodes are respectively arranged on the two flat plates of the closed cavity; the anode is positioned between the two cathodes; the anode is arranged on the anode base, the anode base is installed on a water line inner cylinder through the insulation plate transition piece, and the insulation plate transition piece is fixed through the insulation plate fixing nut. The transversecover plates are arranged on the two flat plates of the closed cavity respectively, and the forward cover plate is arranged at the axial tail end of the closed cavity.

The invention relates to a system and a method for rotatably obtaining a strong pulse gamma radiation field by a thickness collimator. A rotor and a fixed housing are combined to form a combined shutter which has a good shielding function and is convenient to rotate at a high speed so as to cut pulse of a stable gamma ray. The fixed housing is a section of cylindrical body which is internally sleeved with a rotary collimator provided with a through hole or a trough. An extremely small gap is reserved between two substances for controlled rotation of the rotor at the high speed. The rotating manner can be realized by a way of a roller, floating or magnetic levitation and the like, so that the narrow pulse of the gamma ray is further formed. The fixed housing is arranged, so that the weight of the rotary collimator is reduced, shielding to scattered rays around the rotor is increased, the quality parameter of the collimator after pulse incision is improved, and the weight of the rotary collimator is effectively reduced, so that a higher rotating speed is conveniently formed and the narrow pulse is obtained.

The invention relates to a decoding system and decoding method of a BMC code. The decoding method of the BMC code includes the following steps: firstly, filtering an input signal by using a filteringmodule, eliminating burr interference, and then performing jump edge detection and analysis on the filtered signal to avoid the effect of strong pulse width distortion on the signal, and finally, carrying out decoding according to a jump edge detection result. High decoding accuracy and decoding efficiency can be achieved. In addition, the decoding system using the decoding method is simple in structure and low in cost.

The invention discloses a cable transmission and multi-module current collection strong pulse current device. The device is composed of dozens of low-inductance capacitor/discharge switch/capacitor modules in parallel, hundreds of low-resistance high-voltage coaxial cables are connected to a cable transition turning-connection component in parallel in a transmission mode, and the transmission cables become dozens of ceramic high-voltage cable connecting parts through the cable transition turning-connection component in a transition mode, and therefore energy of the device enters a vacuum experiment target chamber in a transmission mode. Due to different loads, strong pulse currents can be generated, wherein the amplitude value of the currents is 2 MA-3 MA, and the rise time of the currents is 600 ns-800 ns; a strong X-ray radiation source can be generated by metal wire electrical explosion, or nanometer particle materials of metal wire electrical explosion can be prepared, or dynamics behavior research can be performed on plane solenoid drive oblique wave loading materials.

The invention discloses a high-intensity pulse current crack arrest discharge apparatus. The apparatus comprises a charge loop unit, a trigger loop unit and a discharge loop unit. The trigger loop unit is introduced; a relatively high-intensity pulse current is generated by utilizing a principle that a high-voltage pulse capacitor bank generates an instant strong pulse current during energy storage and discharge; and at the moment that the pulse current passes through a metal plate with a crack, joule heat can be generated at a crack tip under a bypass current concentration effect, and the local temperature of the crack tip is increased and even exceeds a melting point of a material, so that the crack tip is molten to form a molten hole, the curvature radius of the crack tip is increased, the stress concentration is eliminated, and crack emerging and spreading of the crack tip can be inhibited. The apparatus is low in charge power, high in instant output electric energy and mature in technical principle, has intelligence and selectiveness for crack repair, and is simple to operate and small in influence on surrounding environment.

The invention relates to an impact testing device for a parachute landing unmanned aerial vehicle damper and a method thereof. The impact testing device comprises a displacement sensor, an electric discharging loop, an electric discharging coil, an induction coil, a conical driving head, a guiding shaft and a pressure sensor. The electric discharging loop performs instantaneous electric discharging on the electric discharging coil. Strong pulse current is generated in the discharging coil and furthermore an alternated high-strength magnetic field is formed at the periphery of the discharging coil. The induction coil closely abuts against the electric discharging coil. Because electromagnetic induction generates strong eddy current, the directions of the magnetic fields generated by the electric discharging coil and the induction coil are opposite, thereby generating an electromagnetic repulsion force, namely an electromagnetic impact force. The electromagnetic impact force performs impact loading on a to-be-tested damper through the conical driving head and the guiding shaft. Impact force data are acquired through a pressure sensor. Compression amount of the damper is acquired through the displacement sensor. The impact testing device and the method have advantages of accurate controllable impact force, high stability, simple operation and small land occupation. The impact testing device and the method thereof overcome defects of large land occupation, tedious operation and limited impact energy in a landing vibration testing platform for damper impact testing.

The invention discloses a sealing method of kerf-typed crystallizer brass pipe, which comprises the following steps: filling the sealing dielectrics in the kerf part of kerf-typed crystallizer brass pipe; setting electromagnetic working coil on the periphery of crystallizer brass pipe and next to the brass pipe; connecting the electromagnetic working coil with the high-power electromagnetic pulse current generation power; setting inside core mould in the brass pipe; outputting strong pulse current from high-power electromagnetic pulse current generation power; generating alternating magnetic field when the pulse current passes the electromagnetic working coil; deforming the brass pipe of diameter-reducing plasticity through electromagnetic pressure; forming sealing combination of brass pipe and sealing dielectrics.

A strong impulse current auxiliary copious cooling different speed asynchronous rolling device for preparing an ultra-fine grain metal strip comprises a left side copious cooling box and a right sidecopious cooling box; a left side metal crimping device is arranged in the left side copious cooling box; a right side metal crimping device is arranged in the right side copious cooling box; the two ends of a to-be-rolled metal strip are arranged on the left side metal crimping device and the right side metal crimping device correspondingly; an upper work roller and a lower work roller used for rolling the metal strip are arranged above and the below the middle position of the metal strip correspondingly; a left side conductive roller and a right side conductive roller connected with a strongpulse current power source are correspondingly arranged on the two sides of the upper work roller and the lower work roller; the left side conductive roller and the right side conductive roller act onthe metal strip, and apply a strong pulse current on the metal strip; and the upper work roller and the lower work roller are different in rotating speed. The invention further provides a corresponding strong impulse current auxiliary copious cooling different speed asynchronous rolling method, the method is suitable for preparing a large-size ultra-fine grain high-performance strip, it can be avoided that cracks occur on the edge portion of a rolled piece, and important using prospects are achieved.

The invention discloses a technology and equipment for coating a film in a deep hole. The equipment comprises two cathode target systems, two magnetic filtration systems, a vacuum chamber, a turnoversystem, a ceramic solenoid, a workpiece system, auxiliary anodes and the like. A bent tube is a direct current magnetic field; the cylindrical vacuum chamber is a strong pulse focusing magnetic field;and a ceramic tube wound in the vacuum chamber is also wound with the pulse focusing magnetic field. A cathode target is a pushable target when working; inert gases, Ar and hydrogen, are introduced into the vacuum chamber before coating the inner wall of a cylinder, surface cleaning is carried out through corona discharge between the auxiliary anodes and the inner wall of a piece to be coated, and arc deposition film coating is carried out after the cleaning. the length-diameter ratio of the cylinder capable of being coated by the technology and the equipment can be more than 20:1, wherein the diameter of the hole is not less than 20 mm, and the thickness uniformity of a film layer is better than +/-15%, thus making up the key technical bottleneck of poor uniformity and the limited length-diameter ratio of coating the film on the inner wall at home and abroad.

The invention discloses a pulse welding method, wherein the welding current waveform is cycled an repeated in periodicity. A unit period waveform is composed of a Gaussian wave strong pulse set and a rectangular wave weak pulse set, wherein a Gaussian function modulation mode of the Gaussian wave strong pulse set is divided into a Gaussian wave pulse peak value modulation and Gaussian wave pulse basic value modulation. In the unit period waveform, the time of basic value currents of the Gaussian wave strong pulse is equal, and the time of all peak value currents of the Gaussian wave pulse is equal. During the Gaussian wave pulse peak value modulation, magnitude and duration time of the basic value currents of the Gaussian wave pulse in the unit period waveform are equal, the magnitude of the peak currents is modulated according to a Gaussian function, and the time of the peak value currents is equal. During the Gaussian wave pulse basic value modulation, magnitude and duration time of the peak value currents of the Gaussian wave pulse in the unit period waveform are equal, the magnitude of the basic currents is modulated according to a Gaussian function, and the time of the basic value currents is equal. The welding method is capable of concentrating energy, good in controllability, and particularly suitable for welding sheet aluminum alloy.