68results about How to "No thermal effect" patented technology

The invention provides a method for cutting a transparent material by using ultra-short pulse laser. The ultra-short pulse laser output by an ultra-short pulse laser generating device is condensed by a condensation device so as to form a bunching laser beam; the bunching laser beam enters from the surface of the transparent material to be machined, so that the center refractive index at a laser application point is increased to form a waveguide structure along a laser emitting direction; the laser is transmitted to the inside of the transparent material along the waveguide structure, and continuously generates a waveguide structure along the laser emitting direction in a transmission process until the entire waveguide structure and the laser penetrate through the transparent material; and therefore, the laser moves in a direction which is vertical to the surface of the transparent material at uniform speed, so that a waveguide plane is formed in the transparent material. The invention further provides a device for cutting the transparent material by using the ultra-short pulse laser. The method and the device for cutting the transparent material by using the ultra-short pulse laser provided by the invention have the advantages of fast cutting speed, small cutting seam, no material consumption and no powder pollution. When the machined material bears a suitable external force, the material is cracked only along a stress fault surface; the broken surface nearly has no conical degree; and the roughness is good.

In an underground exploitation process of a coal mine, the coal recovery rate needs improving, and a roller bit of a coal mining machine is prevented from cutting roof strata as far as possible so as not to damage equipment or even cause accidents, so an interface of a coal layer and a rock layer needs on-line identification. The invention provides a coal-rock interface identification method, a coal-rock interface identification system and a coal-rock interface identification probe. A specific energy-level high-pressure water jet which can penetrate the coal layer but cannot penetrate the rock layer is jetted to the coal layer above a tunnel, different acting forces of reflected flow reflected by the coal layer or the rock layer on a nozzle are sensed in real time, and a controller judges the distance between the upper end of the roller bit of the coal mining machine and the coal-rock interface to realize automatic heightening control of a rocker arm of the coal mining machine so that the coal exploitation process realizes the goals of high recovery rate, low mechanical abrasion rate, automatic operation and the like. The coal-rock interface identification method, the coal-rock interface identification system and the coal-rock interface identification probe provided by the invention have the advantages of low cost, high adaptability, high reliability, intrinsic safety and the like.

The invention discloses a device of optical capturing and detecting based on quantum photon Nano-jet array. The device comprises a microscope, a microfluidic channel is arranged on an microscopic objective table, the microfluidic channel consists of a cover glass and a glass slide, two optical fibers are placed inside the microfluidic channel, two optical fibers are respectively sleeved a glass capillary, the glass capillary is fixed on an adjustable light regulation frame, wherein end of one optical fiber is connected with a Y-tape optical fiber coupler,a photoelectric detector and a fiber laser, other end of the photoelectric detector is connected with an oscilloscope, other end of the other optical fiber is connected with a laser device. The invention further discloses a method of optical capturing and detecting based on quantum photon Nano-jet array, comprises the following steps: 1, preparing a mini-type optical fiber probe for capturing and detecting; 2, making a micro-lens array; 3, using the assemble micro-lens for capturing and detecting fluorescence Nano-particles; 4, using the assemble micro-lens for capturing and detecting colon bacillus.

The invention provides a CPA and OPCPA mixed type ultra high power femtosecond laser system which comprises a Ti sapphire femtosecond locked mode impulse hunting device, a programmable acoustic optical modulator, a pulse broadening device, a CPA amplifer chain, an OPCPA terminal amplifier stage, an Nd:YAG pumping source, a CPA amplifier chain pumping source, an OPCPA terminal amplifier stage high-energy pumping source, a vacuum tube and a compressor, wherein pulse laser sequentially passes through the CPA amplifier chain and the OPCPA terminal amplifier stage by broadening of the pulse broadening device, and amplifier laser pulse is compressed by the compressor after transmitted by a vacuum tube image. The CPA and OPCPA mixed type ultra high power femtosecond laser system has the advantages of being high in stability, high in conversion efficiency, high in single-pass gain, free of heat effect, and free of parasitic oscillation, and achieving stable and high-efficiency IOPW stage high-power output, and even laser output of an ES (1018W) stage.

The invention discloses an anti-icing coating for an insulator. The anti-icing coating consists of a high-resistivity coating and a low-resistivity coating. The high-resistivity coating consists of silicon rubber and carbon black, wherein the weight percentage content of the carbon black is lower than 1 percent; and the high-resistivity coating is coated at the outermost edge of the skirt of the insulator. The low-resistivity coating consists of silicon rubber and carbon black, wherein the weight percentage content of the carbon black is between 10 percent and 30 percent; and the low-resistivity coating is coated on the surface of the insulator except the outermost edge. Two coatings with high resistivity and low resistivity are prepared respectively by adding carbon black into the silicon rubber according to different proportions; the upper surface and the lower surface of the skirt of the insulator are coated with the low-resistivity coating; and the outermost edge of the skirt of the insulator is coated with the high-resistivity coating. By adopting the high-resistivity coating, ice is prevented from growing at the skirt edge by adopting the high-resistivity coating, the flashover voltage is prevented from being lowered by ice bridging, the working stability of the insulator is enhanced, and safe and reliable power transmission is ensured.

The invention provides an LTCC substrate with built-in microchannels and high heat dissipation performance as well as a manufacturing method thereof. The LTCC substrate comprises an upper layer part,a middle layer part and a lower layer part; the upper layer part is provided with a metal column array, the middle layer part is provided with a cavity formed by two microchannels and a hollow cavitywhich are communicated, the hollow cavity is internally provided with a metal column array, and metal columns of the upper layer part and metal columns of the middle layer part are in one-to-one correspondence; and the lower layer part is provided with a cooling liquid outlet/inlet hole. The manufacturing method comprises the following steps: preparing a carbon belt green body sample with a metalcolumn array and a pure carbon belt green body sample; preparing an upper layer green ceramic disc, a middle layer green ceramic disc and a lower layer green ceramic disc respectively corresponding tothe upper layer part, the middle layer part and the lower layer part; and laminating the carbon belt green body sample and the green ceramic discs in a corresponding manner, and sintering. The substrate provided by the invention is provided with the metal column arrays, the cavity and the microchannels, and the metal column array in an upper layer transfers heat produced by a chip to the metal column array in a middle layer; and the metal column array in the middle layer transfers heat to a heat dissipation medium inside the cavity by virtue of increased surface area, so that the heat dissipation performance of the substrate is improved.

The invention discloses a novel flexible terahertz 2bit code metasurface for wide-frequency-band radar scattering cross section reduction. The novel flexible terahertz 2bit code metasurface involves the following steps that electromagnetic field software is used for designing the structural shapes and parameters of four elements of '00', '01', '10' and '11' under optimization of the structural parameters, and the 2bit code metasurface achieving terahertz broadband nondirectional scattering, namely diffuse reflection, is optimized; on the basis of optimizing the 2bit code metasurface, a silicon wafer is coated with a polyimide film with a needed thickness; a needed code metasurface is prepared on the polyimide film through traditional micromachining technology, the silicon wafer is removed on the basis of the prepared 2bit code metasurface, and on the basis that the silicon wafer is removed, a gold film with a needed thickness is evaporated on the polyimide film on the other surface of a metal-free structure; terahertz broadband radar scattering cross section reduction is achieved, and simulation and experiment results show that the radar scattering cross section reduction can reach above 10 dBsm within the range from 0.66 THz to 1.26 THz.

The invention discloses a hericium erinaceus polysaccharide extraction and separation method, which comprises the following steps: S1, obtaining hericium erinaceus powder; S2, freezing the hericium erinaceus powder with liquid nitrogen, unfreezing the hericium erinaceus powder with an unfreezing agent, and repeatedly freezing and thawing the hericium erinaceus powder for three times; S3, introducing inert gas until the pressure is 4000-5500kpa, and rapidly recovering to normal atmospheric pressure to obtain a hericium erinaceus cell suspension; S4, conducting centrifugal separation, and flocculating supernate through a flocculating agent, thus obtaining a hericium erinaceus polysaccharide extract. Hericium erinaceus polysaccharide is extracted evenly and thoroughly, the extraction speed ishigh, and the operation is easy and convenient. The structural integrity of polysaccharide is protected. The extraction rate is high, and pure physical extraction is achieved. The hericium erinaceuspolysaccharide extract is non-toxic, harmless and low in cost.

The invention provides an outer cavity type electrooptically tuned laser device, wherein an adopted electrooptically tuned filter adopts a liquid crystal Fabry-Perot cavity with very short cavity length and can ensure that only one mode of the fixed Fabry-Perot cavity of the filter is selected within one period interval, a broadband film is used for filtering periodic multiple waves generated by the fixed Fabry-Perot cavity and only reflecting wavelength of one peak to an optical resonant cavity, then one peak of a longitudinal mode of the optical resonant cavity can be adjusted to a main peak of the electrooptically tuned filter through an electrooptically tuned liquid crystal phase compensator, then single mold output of laser can be ensured, and the stability and reliability of the output of the laser can be improved.

A high-pressure water cutting machine relates to the technical field of metal cutting equipment; one side of the frame is provided with a workbench, and a slide rail and a horizontal screw are arranged on the frame, and the horizontal movement motor is connected to the screw drive, and the screw is screwed with a Nut, the nut is connected with a moving frame, the moving frame is provided with a slide rail and a longitudinal screw rod, the longitudinal moving motor is driven and connected with the longitudinal screw rod, the longitudinal screw rod is connected with the longitudinal slider through the nut, and the lower end of the slider is fixed with a nozzle; The water tank is connected to the nozzle through a high-pressure water pump; the single-chip microcomputer is respectively connected to the horizontal movement motor, the longitudinal movement motor and the high-pressure water pump. The high-pressure water cutting machine of the present invention has no cracks, no burrs, and no dross on the cutting workpiece, and the incision is small and smooth, without thermal effects, work hardening and stress, and does not require secondary processing, which reduces processing time and improves production. Efficiency, no environmental pollution.

The invention discloses a production process for an integrated solar cell with diodes and a manufacturing method for a photovoltaic assembly. The production process comprises the following steps of: generating completely-isolated diodes on part of the back surface of the cell by virtue of the design concept of integrated circuits, a photoetching technology and an etching process; printing the same paste on the back surfaces of cell slices by virtue of a printing silk screen, and connecting the negative poles of the diodes with the positive pole of the cell (or connecting the positive poles of the diodes with the negative pole of the cell); and forming the integrated solar cell which is characterized in that the front surface is provided with the cell while the back surface is partially provided with the diodes. One end of the cell is connected with the diodes, and the other end of the cell is independent. During a process of producing an assembly by using the cell, the cell is connected with the electrodes of the diodes by virtue of a welding strip welding process, so as to form the photovoltaic assembly without a need to be externally connected with bypass diodes.

The invention belongs to the technical field of electric vehicle application, and provides an electric vehicle cold start system based on eddy current heating. A high-frequency alternating current is introduced into eddy current coils arranged at the upper position and the lower position of the square battery, an eddy current is generated on a metal pole plate of the square battery through the electromagnetic induction effect, and the square battery is evenly heated through the heat effect of the eddy current. Temperature sensors are distributed on the surfaces of the square batteries, temperature signals of the surfaces of the batteries are transmitted to a single chip microcomputer, and the single chip microcomputer controls an inverter so as to control the heating process. Compared with a traditional electric automobile cold start system, the electric automobile cold start system has the advantages that the square batteries are heated in a spaced mode through the electromagnetic induction effect, the uniformity of the temperature of the single batteries is guaranteed, and the influence of heat conduction on other parts in an automobile body is reduced. Compared with a traditional heating mode, the efficiency of eddy current heating is as high as 95%. The eddy current heating speed is high and the response time is short. The system can directly utilize a direct-current power supply provided by a square battery, and the direct-current power supply is converted into a high-frequency alternating-current power supply through an inverter.

The invention discloses a pork preserving method with irradiation, and the method comprises the following steps: rapidly freezing fresh pork at -20 to -10 DEG C for 1-2 hours, then cooling the pork at -2 to 6 DEG C for 5-10 hours, and cutting the pork into chilled meat blocks of 100-500 grams; treating the chilled meat with antioxidants at -2 to 6 DEG C, wherein the antioxidants comprise tea polyphenols; carrying out controlled atmosphere packaging on the chilled meat after antioxidation treatment, wherein in the controlled atmosphere shielding gas used for controlled atmosphere packaging, the gas ratio of oxygen to carbon dioxide to nitrogen gas equals to 70:20:10, or the gas ratio of oxygen to carbon dioxide equals to 75:25; and carrying out irradiation on the chilled meat after controlled atmosphere packaging. The pork preserving method with irradiation combines a controlled atmosphere technique with an irradiation preservation technique, has good sterilizing effect and broad-spectrum sterilization, and can effectively avoid bacterial breeding, prolong the preservation time of meat and keep the meat fresh red, and the irradiation is cold treatment which hardly generates heat effect.

The invention discloses a method for preparing a friction-reducing and wear-resistant porous coating on the inner surface of a shaft sleeve type part. The method comprises the following steps of: polishing the inner surface of the part, washing and drying the part; installing the part in a mechanically coating ball-milling tank; putting a certain amount of mixed powder and several hard alloy grinding balls in a ball grinding tank, wherein the mixed powder comprises nickel-based alloy powder, ceramic particle powder and Sn powder; closing the ball-milling tank, and carrying out ball milling under the protection of an inert gas to achieve mechanical coating of the inner surface of the part; and putting the coated part in a vacuum furnace, and carrying out vacuum pressureless sintering to form the friction-reducing and wear-resistant porous coating with the thickness of 1.2mm and the porosity of 5 to 25%. The prepared coating is tightly bonded to the inner surface of the part, and has small residual stress, connected and uniformly distributed pores, and excellent mechanical properties and tribological properties under oil lubrication. The method is suitable for shaft sleeve type partsmade from various materials including non-ferrous metals, is simple in process and low in cost and has no environmental pollution.

The invention discloses an energetic room-temperature curing agent based on a hydroxyl-terminated polybutadiene bonding system, namely, 5-nitrobenzene-1, 3-dinitrile oxide. According to a preparationmethod of the energetic room-temperature curing agent based on the hydroxyl-terminated polybutadiene bonding system, with 1, 3-phthalic aldehyde as an initial raw material, the 5-nitrobenzene-1, 3-dinitrile oxide is synthesized through four steps of reactions of nitrification, oximation, halogenation and dehydrohalogenation. The invention further discloses a solidified body, which is formed by mixing hydroxyl-terminated polybutadiene and the 5-nitrobenzene-1, 3-dinitrile oxide, of the energetic room-temperature curing agent based on the hydroxyl-terminated polybutadiene bonding system. The prepared energetic room-temperature curing agent based on the hydroxyl-terminated polybutadiene bonding system, disclosed by the invention, has the advantages of good product quality, high yield and simple separation, is suitable for large-scale industrial production, is suitable for room temperature curing and forming of hydroxyl-terminated polybutadiene type cast composite propellent in a solid rocket engine and room temperature curing and forming of a HTPB type explosive mixture and can also be used for room temperature curing of other HTPB type adhesives, sealing materials and coatings.

The invention provides a device with a manganese oxide film adjustable and controllable in a magnetic domain wall. The device comprises a manganese oxide core unit and a magnetic domain wall adjusting and controlling unit. The manganese oxide core unit comprises three layers of structures, namely the conductive manganese oxide film, an insulating substrate and a metallic conductive base arranged sequentially from top to bottom. The magnetic domain wall adjusting and controlling unit is a magnetic conductive needle point, a magnetization direction of the magnetic conductive needle point is perpendicular to the surface of the manganese oxide film, and the magnetic conductive needle point closely contacts with a top film surface and can move along the same. The invention further provides a magnetic domain wall adjusting and controlling method of the manganese oxide film. The method includes moving the magnetic domain wall on the basis of a low-voltage alternating-current electric field effect of the needle point. Based on the device and the method, the invention provides a magnetic memory and a writing method thereof. Since the adopted voltage amplitude is low and no thermal effect is produced, power consumption is reduced.

The invention discloses laser multifunctional cleaning equipment suitable for ships. The equipment comprises a sensing positioning unit, a signal processing unit, a control unit, a laser cleaning unitand an optical imaging unit. The sensing positioning unit, the signal processing unit and the control unit are connected with the laser cleaning unit and the optical imaging unit correspondingly. Thesensing positioning unit is used for acquiring orientation information about a cleaning part of the laser cleaning unit and sending the orientation information to the control unit, the signal processing unit and the control unit control the cleaning action of an image sensing positioning device according to the orientation information, and the optical imaging unit is used for acquiring image information about the cleaning part and sending the image information to the control unit; and the control unit determines cleaning parameters according to the image information and controls the laser cleaning unit to emit laser for cleaning.

The invention discloses a solar cell preparation method, and belongs to the technical field of solar cell preparation. The method mainly comprises the following steps that cleaning is conducted; texturing is conducted; boron diffusion is conducted; regional ion implantation is conducted, wherein the back is divided into a comb-shaped N type region and a comb-shaped P type region; annealing is conducted; laser etching is conducted, wherein PN junctions around a silicon wafer are removed, so that PN junctions of the front and the back are separated, the front adopts the main cell PN junction, and the back adopts the secondary cell or protection diode PN junction; by means of PECVD, the two sides of the silicon wafer are coated with films, and anti-reflection films are formed; silk-screen printing is conducted on the front and the back of the silicon wafer, and a front electrode, a first back electrode and a second back electrode are formed through sintering. Accordingly, the influence caused by a bypass diode on the solar cell and component sunlight area is avoided; meanwhile, the solar cell shot spot effect problem can be solved, the generating efficiency is improved, the power generation loss is lowered, and the component operating life is prolonged.

The invention relates to a liquid working medium temperature change self circulation power generation device and power generation method, which belong to the technical field of comprehensive utilization of energy. The technical scheme is that: a liquid working medium heating device is arranged in a heater; the liquid working medium is rose in temperature, reduced in density and increased in volume after being heated in the heater; the liquid working medium is driven by buoyancy lift to automatically flow to a water wheel generator along an outlet pipeline on the upper part of the heater to push the water wheel generator to apply work; the decompressed liquid working medium automatically flows back to an inlet on the lower part of the heater from a liquid return pipeline to form a natural circulation loop; and the water wheel generator applies work continuously to generate power. The water wheel generator is introduced to a liquid working medium temperature change self circulation system to convert kinetic energy of the self circulation system into electric energy, so that the power generation method is safe, environment-friendly, energy-saving, water-saving, low-cost, high in power generation efficiency, without cold and heat effects and consumption of cooling water and cooling air, and is a novel power generation method.

The invention discloses gastrodiaelata wine and a preparation method thereof, and belongs to the technical field of health wine. The gastrodiaelata wine is prepared by the following steps: with freshgastrodiaelata as a raw material, treating the raw material, adjusting juice, saccharifying and inoculating with bacteria, performing primary fermentation, performing post-fermentation, aging and thelike. From raw material treatment to fermentation into the finished gastrodiaelata wine, all the steps are performed at low temperature, and UV pulse sterilization is adopted to avoid heat effect, sothat heat-sensitive components and volatile components are greatly protected, and destruction and loss of effective components of the gastrodiaelata are avoided. The gastrodiaelata wine prepared by the preparation method provided by the invention has the alcoholic strength of 14.9%vol (20 DEG C) and the gastrodin content of 106.65mg/L, the wine liquid has strong complex Baijiu aroma and special tianma aroma, the wine body is coordinated, mellow and palatable, and the gastrodiaelata wine has a unique flavor.

The invention relates to a method for destroying a waste automobile airbag gas generator. The method adopts a water knife cutting process, namely by using high-pressure water jet flow to carry out cold-state cutting so as to destroy the airbag gas generator, and involves a water knife cutting machine, wherein the water knife cutting machine is mainly composed of a high-pressure pump, a numerical control machining platform, an injection cutting head, a sand supply system and a cooling system; and meanwhile, a waste water pretreatment system is also provided. The airbag gas generator is divided into two halves after being cut by a water knife, wherein sodium azide (NaN3 ) and potassium nitrate (KNO3) and the like of the airbag gas generator are completely dissolved in water, and an igniter is completely destroyed to lose the detonation function, so that only a metal shell capable of being recycled of the whole gas generator remains, and the metal shell is separately treated after being collected. Compared with the prior art, the method for destroying a waste airbag gas generator has the advantages of being safe and reliable in process, clean and environment-friendly, small in occupied area, low in operation cost, high in treatment efficiency and capable of running for 24 hours continuously; and meanwhile, the recycling application of the gas generator outer shell after treatment is wide.