49results about How to "Optimize energy distribution" patented technology

The invention discloses a method of improving laser processing efficiency by optimizing light beam quality, and relates to the technology application field of optical systems and laser processing systems. The method is characterized in that light beams of an Nd: YAG laser device are optimized and shaped from two aspects, wherein a step A is that a shaping system of a Galileo-type aspherical mirror set is used for optimizing and shaping round laser spots in a Gaussian distribution pattern into round laser spots in an ultra Gaussian flat-topped distribution pattern; a step B is that the round laser spots in the ultra Gaussian flat-topped distribution pattern in the step A pass through a spot conversion device and are converted into linear spots in the ultra Gaussian flat-topped distribution pattern under the action of the spot conversion device. Laser beams obtained through the method are uniform in energy distribution and optimized in quality, and energy conversion efficiency of laser is improved. The method has the advantages that the technique is simple, and since two sets of devices are both composed of various lenses, cost and power consumption are low, and the method is easy to implement.

A laser beam irradiating apparatus comprising, a plurality of lasers, member for synthesizing a plurality of laser beams emitted respectively from the plurality of lasers into a single laser beam on a stage, and member for moving the synthesized laser beam on the stage while keeping a specific shape thereof. A semiconductor film can be crystallized or an impurity element doped therein can be activated by irradiating a laser beam to the semiconductor film from the laser beam irradiating apparatus arranged as above. Consequently, it is possible to provide a laser beam irradiating apparatus capable of achieving uniform annealing efficiently by employing an optical system simpler than a conventional one and using laser beams having attenuated regions. Also, it is possible to provide a method of irradiating a laser beam using the laser beam irradiating apparatus, and to provide a method of manufacturing a semiconductor device including the laser beam irradiating method in the fabrication sequence thereof.

The invention discloses an aluminum alloy pulse ultrasound and electric arc composite welding device and method. Based on ultrasound and electric arc composite welding, the device further comprises a current and voltage detection circuit, a DSP, a single chip microcomputer, a triode switch circuit and a drive circuit. The current and voltage detection circuit is connected with the output end of a matching circuit of an ultrasound generation system. The current and voltage detection circuit is connected with the DSP. The DSP is connected with the drive circuit. The single chip microcomputer is connected with the triode switch circuit. The triode switch circuit is connected with the drive circuit. The drive circuit is connected with a DC / AC full-bridge inversion circuit of the ultrasound generation system. According to the welding method, ultrasound is applied to conduct pulsing processing, and aluminum alloy pulse ultrasound and electric arc composite welding is achieved. The aluminum alloy pulse ultrasound and electric arc composite welding device and method have the advantages of ordinary ultrasound and electric arc composite welding, the electric arc stiffness can be improved, weld penetration is increased, grains are refined, the size of molten drops is reduced, transition frequency is increased, splashing is reduced, high-quality welding under a common welding environment is achieved, aluminum alloy welding pores, welding cracks and the like can be reduced effectively, the microstructure of weld metal is optimized, and the mechanical property of welding connectors is improved remarkably.

The invention relates to a method for adjusting states of charge of battery cells which are electrically operated in a manner connected in parallel, having the following steps of: - determining the states of charge of the battery cells, - selecting those battery cells whose states of charge are intended to be adjusted according to a predefinable selection rule, - activating those battery cells which are adjusted using a semiconductor switch of the battery cells in each case, and deactivating the remaining battery cells using the semiconductor switches of the respective remaining battery cells, - adjusting the states of charge and monitoring the states of charge, and - ending the adjustment of the states of charge if a predefined state of charge is reached by the activated battery cells.

The invention discloses an independent micro-grid dynamic optimization scheduling method, which comprises the following steps of: 1, establishing a long-period energy matching evaluation and optimization model for an independent micro-grid system, and formulating a diesel oil consumption plan, an energy storage system energy storage plan and a load transfer plan within expectation; comprising the following steps: establishing objective functions about reliable power supply probability, diesel consumption and load transfer amount; setting constraint conditions of an energy storage system, diesel oil consumption and load energy transfer; 2, establishing a day-ahead stochastic optimization model based on scene analysis, and making a micro-grid hourly scheduling plan in the next day; the photovoltaic and load uncertainty is processed through a multi-scene technology, and meanwhile, the scheduling risk cost caused by the photovoltaic and load uncertainty is measured by using the conditional value-at-risk CVaR; the load transfer scheme and the standby electricity demand in the long-period energy matching evaluation and optimization stage are considered; an objective function in the day-ahead stochastic optimization model is to minimize comprehensive scheduling cost, and the comprehensive scheduling cost comprises scheduling cost and risk cost; the constraint conditions comprise a power balance constraint, an energy storage operation constraint, a diesel generator operation constraint, a load transfer constraint and a standby electricity demand constraint.

The invention discloses an interferometric fiber-optical sensor based on a core shift structure. The interferometric fiber-optical sensor based on the core shift structure comprises introducing single-mode optical fibers, sensing single-mode optical fibers, multimode optical fibers, leading-out single-mode optical fibers and a spectrograph. The introducing single-mode optical fibers are used for receiving and transmitting light beams from a light source, and outputting the light beams to the sensing single-mode optical fibers. The sensing single-mode optical fibers are in core shift fusion welding relative to the introducing single-mode optical fibers and are used for generating interference and enabling the interfered mode to be coupled to the multimode optical fibers. The multimode optical fibers enable the interfered mode to be coupled to the introducing single-mode optical fibers so as to achieve outputting. The spectrograph is used for executing transmitted spectrum detection on the interfered mode output by the introducing single-mode optical fibers and obtains sensing data correspondingly according to a detection result. The invention further discloses a corresponding manufacturing method. By means of the interferometric fiber-optical sensor based on the core shift structure and the manufacturing method thereof, indeterminacy caused by the offset direction is effectively avoided, the extinction ratio of the entire sensing system can be improved obviously, and meanwhile an optical fiber sensor which is high in sensitivity and convenient to manufacture and package is obtained.

The invention discloses an aluminum alloy pulse ultrasound and electric arc composite welding device and method. Based on ultrasound and electric arc composite welding, the device further comprises a current and voltage detection circuit, a DSP, a single chip microcomputer, a triode switch circuit and a drive circuit. The current and voltage detection circuit is connected with the output end of a matching circuit of an ultrasound generation system. The current and voltage detection circuit is connected with the DSP. The DSP is connected with the drive circuit. The single chip microcomputer is connected with the triode switch circuit. The triode switch circuit is connected with the drive circuit. The drive circuit is connected with a DC / AC full-bridge inversion circuit of the ultrasound generation system. According to the welding method, ultrasound is applied to conduct pulsing processing, and aluminum alloy pulse ultrasound and electric arc composite welding is achieved. The aluminum alloy pulse ultrasound and electric arc composite welding device and method have the advantages of ordinary ultrasound and electric arc composite welding, the electric arc stiffness can be improved, weld penetration is increased, grains are refined, the size of molten drops is reduced, transition frequency is increased, splashing is reduced, high-quality welding under a common welding environment is achieved, aluminum alloy welding pores, welding cracks and the like can be reduced effectively, the microstructure of weld metal is optimized, and the mechanical property of welding connectors is improved remarkably.

The invention provides a method and a system for recognizing working conditions of a hybrid-power shunting engine. The recognizing method includes: a first stage: obtaining an output power sum curve of the shunting engine in a specific working state; sampling the output power sum curve, wherein each sample is a section of output power sum curve, sampling time is ts seconds, and sampling interval is tf seconds; calculating a first characteristic parameter of each section of output power sum curve; and confirming control parameters required by working state recognition according to the specific working state and the first characteristic parameter; and a second stage: collecting output power sum value of a driving motor in each ts second of the current shunting engine, wherein collecting gap is equal to the sampling interval tf; enabling the output power sum value in each ts second to be a segment, and calculating a second characteristic parameter of the segment; and confirming working state of the shunting engine according to the control parameter acquired in the first stage and the second characteristic parameter.

The present invention relates to a device for generating a disturbance in the differential mode of propagation of an RF signal transmitted along a coaxial transmission line.

The invention discloses a dynamic power distribution method based on an EH distributed base station system. The purpose of the invention is to ensure that the energy collected by the EH remote antennaunit can be used by itself. Redundant energy can be conveyed to the energy sharing pool; and the energy sharing pool is shared by other EH remote antenna units, and whether the energy sharing pool transactions with the intelligent power grid is determined according to the amount of energy in the energy sharing pool, so that dynamic change of an energy transmission rate threshold value between theEH remote antenna units and the energy sharing pool and dynamic distribution of power are realized. According to the invention, dynamic balance of energy utilization is facilitated, and the performance of the system is improved.

The invention discloses a diffusion rotating device which is arranged on a transmission path of a light beam. The diffusion rotating device comprises a substrate, a rotating shaft and a driving element. The rotating shaft is connected to substrate. The driving element is connected to the rotating shaft and used for driving the rotating shaft to rotate. The substrate comprises a first diffusion region and an optical region which are adjacently arranged, the first diffusion region is provided with a plurality of first diffusion sub-regions, and each first diffusion sub-region extends along the circumferential direction of the substrate and the plurality of first diffusion sub-regions are concentrically arranged along the radial direction of the substrate; when the first diffusion region cutsinto a transmission path of a light beam, the light beam forms a first light spot on the first diffusion region of the substrate; in the radial direction of the substrate, the diffusivity of the first diffusion sub-region corresponding to the central part of the first light spot in the plurality of first diffusion sub-regions is greater than the diffusivity of the first diffusion sub-region corresponding to the edge part of the first light spot. A projection device is also provided. Therefore, the projection device applying the diffusion rotating device has good optical efficiency.

The invention relates to a process for carrying out strengthening circulation, stage grinding and quality improvement on lignite by utilizing superheated steam and a system thereof. The method comprises the following steps: (1) carrying out grinding on the raw material lignite; (2) burning one part of coal blocks / powder to produce high-temperature flue gas serving as a heat source and carrying out air separation and dring on the other part of coal blocks / powder requiring to be subjected to quality improvement; (3) in the process of air separation, adopting the high-temperature flue gas from the step (2), carrying out drying, separation and dust removal on the qualified coal blocks / powder conforming to the standard grain diameter after air separation, collecting the qualified coal blocks / powder, sending the qualified coal blocks / powder to the forming process, making the unqualified coal blocks / powder drop in a grinding ventilating device to carry out grinding and drying, then continuously completing deep drying by air separation and repeating the steps, wherein the oxygen content in the flue gas is less than 8 percent; and (4) sending one path of waste gas subjected to air separation and drying to the washing process and returning the other path of waste gas serving as a return tail gas part to the step (2) so as to prepare the high-temperature flue gas and carry out air separation. The process has the advantages of safety, energy saving, environment protection, high efficiency, stability and the like.

The present invention provides a method for improving the toughness of additively manufactured samples, which includes the following steps: (1) single-pass forming process: obtain single-pass morphology under different laser forming processes, and select forming conditions corresponding to continuous and uniform melt paths; 2) Change the laser scanning strategy to print a cuboid with different scanning line spacing; (3) Cut a small square from the end of the cuboid, grind the six sides of the small square and conduct a density experiment to obtain the density; After the annealing treatment of the cuboid of the small square, it is processed into a tensile strip by wire cutting, and the stress-strain curve and toughness value of the printed part are obtained through the tensile test; (5) Analyze the fracture morphology of the stretched strip, and select a reasonable scan Line spacing value for strong, tough prints. This method improves the energy distribution of the laser acting on the material, reduces thermal stress, and is conducive to obtaining printed samples with high surface precision and good toughness; it is simple and easy to implement, and is conducive to meeting the needs of the 3D printing industry.