2499 results about "Electric arc" patented technology

The invention discloses a 3D printing path planning method based on electric arc additive anisotropy and a stress field, and the method comprises the steps: constructing a CAD three-dimensional model of a part, and obtaining the stress field of the part through finite element simulation; determining a slice plane; mapping the stress field to a slice plane to form a force flow line; according to the obtained force flow line, rotation transformation regeneration is carried out according to the anisotropy of the used electric arc additive, and a reference trajectory considering the anisotropy of the material is obtained; under the principle of alternate arc starting and extinguishing, the corresponding printing sequence in the layers and between the layers is further planned, and the reference trajectory lines are connected end to end to be planned into a continuous path; and generating a code file, and printing according to the printing sequence. The comprehensive mechanical property of a printed piece is improved.

The invention relates to the field of electrical parameter measurement of power distribution switch equipment, in particular to an arc fault measurement method, system and device in the power distribution switch equipment and a medium, and the method comprises the steps: collecting a current signal in a power distribution loop in real time; separating out target frequency band components of which the frequency is greater than a preset frequency threshold in the current signal; performing envelope extraction on the target frequency band component to obtain an envelope signal; performing time domain analysis on the envelope signal to obtain the regularity intensity of the pulse of the envelope signal; performing short-time Fourier transform on the target frequency band component, and calculating a frequency spectrum variance; taking the regularity intensity and the spectrum variance as feature vectors, and inputting the feature vectors into a pre-trained artificial intelligence model; outputting a first fault diagnosis result by the artificial intelligence model; and generating a control instruction based on the first fault diagnosis result to trigger the protection device to act. The method has the advantage that the dangerous electric arc in the power distribution loop can be accurately identified and quickly responded.

An AC series arc detection method, system and device and a readable storage medium relate to the technical field of electrical engineering, and specifically comprise the following steps: generating a current anomaly event and a corresponding current anomaly time window based on a current signal at a current sampling moment and a current signal at a previous sampling moment; the current abnormal events comprise current short-time sudden change abnormity, high-frequency energy sudden increase abnormity and intermittent conduction interruption abnormity; generating a voltage abnormal event and a corresponding voltage abnormal time window according to all voltage signals in the current abnormal time window and the voltage signal at the current sampling moment, wherein the voltage abnormal event comprises zero-crossing conduction abnormity and voltage transient amplitude abnormity; determining a current and voltage dual-channel abnormal event based on the current abnormal time window and the voltage abnormal time window in a preset time alignment window; and determining an alternating-current series arc event according to the current-voltage dual-channel abnormal event to realize alternating-current series arc detection. According to the invention, the accuracy and realizability of alternating-current series arc detection can be ensured.

The invention discloses a switch cabinet electric arc light detection method and system based on multispectral fusion, and relates to the technical field of electric power system intelligent detection, and the method comprises the following steps: S1, building a cross-spectrum unified time reference, and carrying out the synchronous comparison of an infrared light signal, a visible light signal and an ultraviolet light signal, extracting a temperature transition trigger feature and a strong light disturbance spectrum feature, and generating a time synchronization deviation vector; and S2, constructing an anti-fact spectrum playback model based on the time synchronization deviation vector, generating a shadow spectrum sequence, positioning an infrared response threshold lifting reason through energy difference analysis, calculating a spectrum overlapping risk interval and duration, and outputting a threshold disturbance distribution diagram. According to the method, infrared anomalies are identified through cross-spectrum time alignment, anti-fact playback and differential analysis, channel recovery is guided in combination with springback prediction and time sequence correction, and a spectrum broken chain window is constructed through dislocation sampling and phase regulation and control, so that the accuracy and the anti-interference capability of arc identification are effectively improved.

The invention discloses an electric arc fuse wire additive manufacturing method for a complex metal component with a protruding part, which comprises the following steps of: 1, three-dimensional modeling optimization: analyzing a three-dimensional model of the complex metal component; through local treatment, right-angle or oblique angle treatment and protruding part bottom supporting treatment, it is guaranteed that arc fuse wire additive manufacturing can be achieved; the optimized three-dimensional model is subjected to slicing treatment, and an electric arc fuse wire additive manufacturing path is obtained and optimized; and thirdly, the complex metal component with the protruding part is obtained through electric arc fuse wire additive manufacturing. According to the method, through three-dimensional modeling optimization, combined path optimization and additive manufacturing process parameter real-time adjustment, one-time additive manufacturing forming of the complex metal component with the protruding part is achieved, the continuity of the additive manufacturing process is guaranteed, the consistency of the overall performance of the complex metal component is improved, and the manufacturing method is simple in process, controllable and suitable for large-scale production. The method is suitable for the field of electric arc fuse wire additive manufacturing.

The invention provides a steel pipe welding seam regulation and control method and system, electronic equipment and a storage medium, relates to the technical field of steel pipe welding, and continuously obtains multi-modal data, including visual image data, laser contour data, arc sensing data and infrared thermal image data, of the welding surface of a steel pipe in the welding process. And carrying out space-time alignment on the data to obtain a standardized fusion data set. And inputting the fusion data set into a double-branch deep learning model, extracting visual image edge features, laser contour geometric features and infrared thermal image temperature distribution features through CNN branches, and extracting arc time sequence fluctuation features through LSTM branches. And carrying out weighted fusion calculation on the characteristics to obtain the real-time coordinates of the groove center of the welding surface of the steel pipe and the temperature state parameter of the welding seam. And according to the real-time coordinates of the groove center and a preset reference, a welding seam temperature state parameter is combined, and a welding seam control strategy of the steel pipe welding surface is generated. According to the invention, high-precision welding seam regulation and control are realized, and the welding efficiency is improved.

The invention relates to the technical field of welding, in particular to a self-adaptive fusion steel pipe welding seam tracking method and system.The method comprises the following steps that a visual sensing subsystem collects a welding seam original laser image of a steel pipe welding plane in real time, and the transverse deviation of a welding gun of the visual sensing subsystem is calculated; the arc sensing subsystem collects original welding current signals in real time for filtering processing, and the transverse deviation of a welding gun of the arc sensing subsystem is calculated; the decision fusion subsystem performs dynamic multi-working-condition optimal fusion on the welding gun transverse deviation of the visual sensing subsystem and the welding gun transverse deviation of the electric arc sensing subsystem to obtain a final welding gun deviation value; and the executing mechanism drives the welding gun to act according to the final welding gun deviation value, and accurate tracking of the steel pipe welding seam is achieved. According to the method and the system provided by the invention, the information of the visual sensing subsystem and the electric arc sensing subsystem is fused, the steel pipe welding seam is tracked based on visual and electric arc composite sensing, and the precision and the reliability of welding seam tracking are greatly improved.

The invention relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method of the high-temperature-resistant flux-cored wire. The high-temperature-resistant flux-cored wire containing the rare earth elements comprises a welding wire skin and a flux core. The flux core comprises the following raw materials of dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, ferro-aluminum, potassium cryolite, potassium titanate, sodium titanate, fine iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, nitrided ferrochrome, bismuth oxide, auxiliaries and the balance reduced iron powder. The auxiliary agent is a mixture of a zirconium-iron alloy, a titanium-iron alloy and an aluminum-magnesium alloy. A specific alloy auxiliary is introduced into the flux core to protect stable transition of rare earth yttrium, yttrium and multiple components synergistically optimize the weld joint performance, 253MA heat-resistant steel is matched, slag and electric arc regulation and control components and a reasonable process are matched, and the welding quality of the welding wire is improved.

A converter station AC filter group circuit breaker abnormal arcing modeling analysis method comprises the following steps: firstly, carrying out time mark alignment, amplitude calibration and filtering de-noising on wave recording signals such as AC bus voltage and filter branch current to obtain high-quality input data; then, combining a primary wiring diagram, enabling an alternating current system to be equivalent to an ideal power supply and series impedance, enabling circuit breaker arcing to be equivalent to arc resistance changing along with time, and constructing an equivalent circuit model comprising the power supply, the impedance, a capacitor, an electric reactor and dynamic arc resistance; establishing a state space equation according to a voltage and current constraint relation, and performing time domain solution by adopting a two-step two-order or three-order diagonal implicit Runge-Kutta method to obtain voltage and current responses of the whole process of the fault; on this basis, the arc resistance change is inversed according to the ratio of arc voltage to current, the current zero passage is identified through the resistance symbol change at adjacent moments, and the zero passage section is smoothed; and finally, the inversion result is verified again by means of the simplified equivalent model.

The invention discloses a node structure electric arc fuse wire additive manufacturing method, and belongs to the technical field of electric arc additive manufacturing. According to the method, the problems that in the prior art, due to uneven heat distribution, the joint binding force is insufficient, the machining allowance is low, and the welding gun collision risk is caused by too high material accumulation in a joint area are solved; the method comprises the steps that a welding gun deposits a first welding bead along an arcing point, when a second cross welding bead is deposited, a coaxial electromagnetic coil is arranged outside the welding gun, an external alternating magnetic field is generated to act on an electric arc, the electric arc and a molten pool oscillate periodically, and therefore the metal fluidity of the molten pool is enhanced; by applying the external alternating magnetic field, non-contact stirring of the molten pool can be achieved, an additional mechanical movement device is not needed, the molten pool has the advantages of being safe and clean, the fluidity of the molten pool subjected to magnetic arc oscillation stirring is higher, and the problems that materials at nodes excessively accumulate and protrude, and joints of the nodes are heated unevenly and shrink are solved.

The invention provides an automatic wire feeding device of a gas shielded welding machine, which belongs to the technical field of electric arc welding equipment and comprises a wire feeding motor, a wire feeding wheel and a wire pressing wheel. Wherein a rotating frame is installed on the side, close to the wire incoming direction, of the output end of the wire feeding motor, a movable straightening wheel and two fixed straightening wheels are installed on the two sides of the center of the interior of the rotating frame respectively, the movable straightening wheel is located between the two fixed straightening wheels, and the rotating frame is arranged to be capable of rotating around the center of the wire guiding pipe. By arranging the rotating frame, the movable straightening wheel and the fixed straightening wheel, a drawn welding wire penetrates through the space between the movable straightening wheel and the fixed straightening wheel in the rotating frame before entering the wire feeding wheel, and the movable straightening wheel and the fixed straightening wheel exert pressure on the circumference of the welding wire along with rotation of the rotating frame; the bending of the welding wire in any direction of the whole circular section can be straightened, and unsmooth wire feeding caused by the fact that the tilting distance of the welding wire is too large is avoided.

The invention relates to the technical field of fire prevention, and discloses a high-and-low-voltage power distribution room fire prevention early warning system based on potassium ion aerosol fire extinguishing, which comprises a smoke fire detection module used for detecting fire related data inside and outside a high-and-low-voltage power distribution room; the fire related data comprises smoke data and temperature data; the comprehensive evaluation module is used for judging whether an adopted evaluation model is a temperature evaluation model or a smoke evaluation model according to the fire related data; the fireproof grade classification module is used for grading fireproof grades in the high and low voltage power distribution room according to the screened evaluation model; the fire prevention measure implementation module is used for starting the potassium ion aerial fog fire extinguishing equipment in the corresponding fire prevention subareas to extinguish fire according to different grades; the electrical characteristic monitoring module is used for monitoring the load current and arc signal intensity of electrical equipment in the high-low voltage power distribution room and the temperature change rate of key nodes in real time; according to the invention, multi-dimensional accurate monitoring and graded prevention and control of the fire risk of the high and low voltage power distribution room are realized.

The invention discloses an online monitoring system and method for an intelligent circuit breaker, and relates to the field of circuit breaker monitoring. The method comprises the following steps: collecting current, port voltage drop, mechanism acceleration and voltage high-frequency signals, and synchronously marking a time service timestamp and a monotonic timestamp for each frame of data; calculating a contact power perturbation intensity and a mechanism springback spectrum difference in the switching-on steady-state window; an electric arc precursor energy gate is calculated in the on-off rising edge window; constructing a multi-domain diagnosis atlas based on the contact entropy flow index, the mechanism rebound spectral difference and the arc precursor energy gate, and performing event root cause judgment to output a waveform section; according to grading and fragmentation of events, generating fragmentation abstracts and whole frame verification, and embedding timestamps and buffer area indexes; performing time sequence rearrangement on the cross-link data to ensure data time sequence consistency; and maintaining the fragment receiving state and retransmitting the missing fragments to complete the consistency verification of the whole frame. And through data fusion and intelligent fragmentation management, the monitoring precision and the data integrity are ensured.

The utility model discloses a fuse link, a fuse and an electric device, and belongs to the field of fuses. The fuse link is provided with a fusing part, a first end used for being connected with a negative electrode and a second end used for being connected with a positive electrode, the fuse link is provided with a first narrow-diameter part between the fusing part and the first end, and the fuse link is provided with a second narrow-diameter part between the fusing part and the second end; the distance between the fusing part and the adjacent first narrow part is smaller than the distance between the fusing part and the adjacent second narrow part. The fusing part is arranged at the first narrow-diameter part on the side, closer to the negative electrode, of the fusing body, when current is overloaded, the fusing part is fused, arcing occurs at the fusing part, an electric arc ignites the first narrow-diameter part and the second narrow-diameter part which are located on the two sides of the fusing part, the fusing part is closer to the negative electrode, the distance of firing towards the positive electrode is reduced, the electric arc is made to be away from a high-temperature area, and the service life of the fuse body is prolonged. The influence of temperature on arc burning is reduced, and rapid arc extinguishing can be realized.

To obtain excellent welding quality by suppressing an increase in generation amount of spatters even when a short circuit occurs between a welding wire and a base material in consumable electrode pulse arc welding.SOLUTION: A feed speed Fw of a weld wire is set to a forward feed peak during a peak period from a time t2 to a time t3, and is set to a reverse feed peak during a base period from the time t4 to the time t52, and a start of the peak period at the time t41 is delayed until a short circuit between the weld wire and a base metal generated during the base period at the time t52 is released.SELECTED DRAWING: Figure 3

The invention belongs to the field of metal additive manufacturing, and particularly relates to a high-strength and high-toughness electric arc fuse wire additive rare earth magnesium alloy component and a preparation method thereof. The high-strength and high-toughness electric arc fuse wire additive rare earth magnesium alloy component is prepared from, by mass, 7.0%-7.4% of gadolinium, 0.6%-1.0% of yttrium, 0.4%-0.5% of zirconium and the balance Mg, wherein inevitable impurities are smaller than or equal to 0.03%. The preparation method comprises the steps of wire material preparation, electric arc fuse wire additive manufacturing, solid solution, water quenching and aging treatment, tissue refinement, texture regulation and control and strengthening phase uniform precipitation are achieved, and the comprehensive mechanical property of a component is remarkably improved. According to the obtained high-strength and high-toughness electric arc fuse wire additive rare earth magnesium alloy component, the yield strength and the tensile strength are larger than 230 MPa and 340 MPa correspondingly, the ductility is larger than 19%, and the application requirements of light-weight structural parts for high specific strength and high ductility can be met.

The invention discloses an electric arc dynamic suppression method for hot plugging of an electric meter connector, relates to the technical field of electric energy metering equipment, and aims to solve the problems of electric arc generation, overproof metering error and the like caused by passive protection and lack of dynamic cooperative control in the prior art. The core of the method is that gap distance and power grid voltage phase signals are acquired in real time through a microcontroller, and the plugging speed, the signal injection and the position fine adjustment are dynamically regulated and controlled in three stages of pre-contact, low-current transition and full connection; and a machine learning model is combined to optimize a parameter threshold value, a redundancy safety mechanism and a multi-phase electric meter cooperative control strategy, so that double management and control of arc peak energy and metering errors are realized. The method can actively inhibit arc generation, avoid connector ablation and insulation deterioration, guarantee metering continuity and accuracy, adapt to complex power grid and environment working conditions, and meet the precision requirement of the intelligent electric meter.

The invention discloses a coating method and a coating device for coating superfine powder. The coating method comprises the following steps: S1, conveying original powder into gas-powder mixing equipment through a mixing pipeline; s2, a feeding unit in the gas-powder mixing equipment is started, meanwhile, an electric arc heating device is started, and the to-be-coated metal material is instantly melted through the high temperature of an electric arc; s3, the molten metal material to be coated forms atomized mixed liquid in gas-powder mixing equipment, and the atomized mixed liquid is conveyed into a collecting unit through spray holes; and S4, in a collecting unit, enabling the metal particles to be coated in the atomized mixed liquid to form a coated powder air mass, forming a coating or powder through deposition, and finally cooling and separating to obtain the coated ultrafine powder material. By adopting the coating method and the coating device, different types of metal materials or ceramic powder can be prepared, and the prepared coated ultrafine powder particles are controllable in particle size and high in purity, so that the application range of the ultrafine powder can be expanded.

A lunar regolith reduction reactor system includes a housing, a crucible, and a pair of electrodes. The housing includes a base structure and a cover structure detachably connected to the base structure, a gas input port to permit input of hydrogen gas into the housing, and a gas output port to permit outgassing of water vapor and gases. The crucible is designed to hold an amount of lunar regolith in the housing. The electrodes are disposed apart from one another and adjacent the crucible, wherein the electrodes are connectable to a power source to generate an electric arc to heat lunar regolith in the crucible and initiate a reduction reaction to separate oxygen gas and reduce separated material into a molten state.

A vacuum induction melting (VIM) furnace and method of using. A VIM is configured for use with metal-containing carbon powders. In operation, the metal-containing carbon powders are formed into a pellet so as to minimize or eliminate ejection of material during introduction of the pellet into the VIM processor. The VIM processor may be substituted or used in combination with a vacuum arc melt processing apparatus, an electron beam melt furnace, an ion plating furnace, a plasma flame source, a smelter, a traditional metal-metal melt furnace, or any equivalent. Pelletizing can be accomplished through use of a press or through application of any pelletizing technique and / or use of any apparatus that is able to generate pellets that have sufficient mass to avoid ejection from a VIM processor.

The invention provides an electrical equipment fire risk assessment system and method for a power distribution network, and relates to the technical field of fire risk assessment, and the method comprises the steps: extracting fault arc features and odd harmonic features of target electrical equipment from a current signal and a voltage signal of the target electrical equipment in the power distribution network; carrying out gradient analysis on the coupling effect of the target electrical equipment due to harmonic heating and load fluctuation thermal shock to obtain a sensitive gradient of thermal runaway generated by the target electrical equipment, and further determining a thermal stability margin of the target electrical equipment under a harmonic distortion working condition; according to the transient current impact value of the target electrical equipment in the nonlinear load fluctuation process, determining an accumulative effect coefficient of thermal aging generated by the target electrical equipment; and then performing fire risk assessment on the target electrical equipment to obtain a risk assessment index of the fire of the target electrical equipment. According to the invention, the method can achieve the evaluation of the fire risk of the electrical equipment under the complex working condition of current and voltage signal distortion caused by a nonlinear load in a power distribution network.

High-frequency irreversible electroporation (H-FIRE) is a tissue ablation modality employing bursts of electrical pulses in a positive phase-interphase delay-negative phase-interpulse delay pattern. Despite accumulating evidence suggesting the significance of these delays, their effects on therapeutic outcomes from clinically-relevant H-FIRE waveforms have not been studied extensively. The present invention provides methods of pulse delivery, including delays, that mitigate bubble formation and / or minimize the risk of arcing, such as due to the presence of bubbles, and / or minimize muscle stimulation are described herein.

The application belongs to the technical field of additive manufacturing, and discloses an electric arc additive manufacturing method for an aluminum alloy thin-walled shell with longitudinal internal rib plates, which comprises the following steps: establishing a three-dimensional model of a component and setting a reference coordinate system; slicing all the longitudinal internal rib plates together with the shell; initializing each slice contour path; extracting the main shape path of the shell and each longitudinal internal rib plate; rearranging the main shape path of the shell and each longitudinal internal rib plate; planning the accumulation path according to the main shape path of each longitudinal internal rib plate; sequentially connecting the shell and all the planned longitudinal internal rib plate paths at the beginning and the end to form a final closed-loop accumulation path; and performing electric arc additive manufacturing according to the closed-loop accumulation path. Through the application, the number of arc breakages in the electric arc additive manufacturing process can be greatly reduced, and problems such as electric arc gun interference and shell melting through that occur when the shell is formed first and then the rib plates are accumulated in the shell can be effectively avoided, thereby significantly improving the component forming quality and efficiency.

The invention provides a power cabinet working condition evolution prediction method based on a physical time sequence orthogonal decoupling architecture, and the method comprises the steps: firstly constructing a multi-dimensional non-stationary signal system based on arc disturbance and load impact characteristics, and collecting the working voltage, temperature rise upper limit, rated and withstand current and other operation parameter data of a power cabinet; in the modal decomposition and screening process, a noise suppression mechanism and a singular information retention technology are utilized, and weakening of non-Gaussian arc interference and retention of working condition abrupt change characteristics are achieved while physically independent orthogonal modal components are separated out. And finally, constructing a double-flow decoupling prediction network based on a deterministic mechanism and data-driven cooperative work. Further, static safety hyperplane constraint is introduced in a parameter updating stage, and a feasible region self-adaptive adjustment mechanism is supplemented, so that the model parameters are subjected to limited optimization on a constraint manifold defined by an electrical safety boundary; by establishing a multi-target topological potential energy function, balance between prediction precision and physical consistency is dynamically coordinated.

The invention discloses a dissimilar magnesium alloy composite structure and a low-cost electric arc additive manufacturing method thereof. The method comprises the following steps that 1, AZ series magnesium alloy wires and rare earth magnesium alloy wires are selected; 2, material distribution of the two kinds of wires is subjected to partition design; step 3, preheating the substrate; 4, depositing a material 1 in a single-arc and sequential wire feeding mode, and 5, depositing a material 2 in the middle: depositing the material 2 as a transition layer under a single-arc consumable electrode heat source. And step 6, interface processing. And 7, the component is preheated again, the material 2 continues to be deposited, and finally the AZ-rare earth magnesium alloy composite structure is obtained. According to the method, a single-arc, sequential wire feeding and interlayer friction stir processing cooperation strategy is adopted, the prepared composite structure has the characteristics of controllable performance, structural integration, good interface metallurgical bonding and the like, the performance limitation of a traditional single material is broken through, and the method has wide application prospects in the fields of aerospace, automobile lightweight and the like.

The invention relates to the technical field of laser material processing, in particular to a method for improving the synergistic enhancement effect of laser and electric arc in an attraction mode. The method comprises the following steps that a workpiece to be welded is installed on a workbench; the back face of the to-be-welded workpiece is subjected to air exhaust treatment, so that a back attraction area is formed on the back face of the to-be-welded workpiece, and the position of the to-be-welded workpiece is adjusted to enable the back attraction area to be located on the lower side of the weld joint; laser and electric arc hybrid welding is carried out on the welding seam, meanwhile, the back attraction area guides electric arc airflow and laser-induced metal steam to directionally escape from the lower side of the butt welding seam, and the concentration ratio of electric arc plasma in the laser action area is improved under the action of attraction force. By the adoption of the method for improving the cooperative enhancement effect of the laser and the electric arc in an attraction mode, the impact effect on electric arc airflow when metal steam generated during laser welding is erupted is reduced, and the cooling effect of the metal steam on electric arc plasmas is reduced. Meanwhile, arc plasmas are attracted to key an orifice area, so that the energy of the arc is more concentrated, and the welding quality and stability are improved.