34results about How to "Guaranteed thermal stability" patented technology

The invention discloses a polyhydroxyalkanoate composition and a preparation method thereof. The polyhydroxyalkanoate composition comprises the following components in parts by mass: 100 parts of polyhydroxyalkanoate; 0.5 to 5 parts of unsaturated D-polylactic acid; 0.5 to 5 parts of poly (L-lactic acid); the preparation method comprises the following steps: S1, carrying out melt blending on the polyhydroxyalkanoate and the unsaturated D-polylactic acid, and enabling the polyhydroxyalkanoate and the unsaturated D-polylactic acid to fully react, so as to obtain an intermediate product; and S2, carrying out melt blending on the intermediate product obtained in the step S1, poly-L-lactic acid and an ester exchange inhibitor to finally obtain the polyhydroxyalkanoate composition with excellent thermal stability, high melt strength and high crystallization speed.

The invention relates to a cobalt-free ultra-high nickel positive electrode material and a preparation method and application thereof, the preparation method comprises the following steps: ball-milling and mixing a nickel source, a lithium source and a dopant to obtain powder, and drying and sintering the obtained powder to obtain the cobalt-free ultra-high nickel positive electrode material, the doping agent comprises an aluminum-containing doping agent and a manganese-containing doping agent; the nickel source, the lithium source and the doping agent are mixed according to the molar ratio of the nickel element to the lithium element to the total doping element being (0.90-0.98): (1.03-1.06): (0.02-0.10). The Al and Mn elements are uniformly doped in the positive electrode material substrate through a solid-phase reaction method, the material performance is synergistically improved by utilizing the unique action mechanism of the doped elements, the electrochemical performance is synergistically improved on the premise of not depending on the cobalt element, and high initial discharge capacity, cycling stability and rate capability are kept in a wide voltage interval; and excellent capacity retention capability is shown in a wide multiplying power range.

The utility model provides an oil-resistant high-precision embedded thermal resistor, which belongs to the technical field of embedded thermal resistors, and comprises a reference end and a measuring end, the measuring end comprises a pipe sleeve head and two resistor elements arranged in the pipe sleeve head, the upper part of the pipe sleeve head is welded with an armored lead wire through laser, and the armored lead wire is connected with the reference end and the measuring end. The armored lead is sleeved with a silica gel heat shrink tube or a polytetrafluoroethylene tube, and a shielding lead is arranged between the armored lead and the reference end. According to the embedded thermal resistor, double resistor elements are adopted, so that the redundancy of a product is increased, cross validation can be realized, the measurement error is reduced, meanwhile, the lead directly connected with the measurement end is an armored lead, and a silica gel heat shrink tube or a polytetrafluoroethylene tube is sleeved on the lead, so that the oil resistance of the embedded thermal resistor is greatly improved, and the service life of the embedded thermal resistor is prolonged. In addition, environmental interference can be inhibited, thermal stability can be maintained, the service life can be prolonged, and the effective precision under actual working conditions is remarkably improved, especially in high-electromagnetic-interference, severe-temperature-change or corrosive environments.

This invention discloses a waterproof and breathable automotive signal light assembly and its sealing process, relating to the field of automotive signal light technology. It includes: a signal light body with LED beads installed inside; a signal light cover installed on one side of the signal light body, sealed together using a sealing process; and an exhaust mechanism located on one side of the heat dissipation mechanism for balancing the internal and external air pressure of the signal light cover. This device achieves dynamic pressure balance and thermal management based on the principle of thermally induced pressure change and unidirectional fluid control: when the LED operates, causing an increase in internal temperature and pressure, the thermally expanded gas overcomes the pre-tightening force of the first elastic element, opening the exhaust one-way valve core and entering the diversion chamber through the exhaust channel. At this time, the intake one-way valve is normally closed, and the high-pressure gas is only discharged through the top connecting pipe to prevent the sealing structure from deforming under pressure; while achieving pressure balance, it prevents direct intrusion of humid air.

The thermoplastic resin composition of the present invention comprises: about 100 parts by weight of polyester resin; about 5 to 30 parts by weight of polycarbonate resin; about 50 to 150 parts by weight of flat glass fiber; about 2 to 10 parts by weight of epoxy-modified olefin copolymer; and about 2 to 10 parts by weight of maleic anhydride-modified ethylene-propylene-diene monomer terpolymer, wherein the weight ratio of the epoxy-modified olefin copolymer to the maleic anhydride-modified ethylene-propylene-diene monomer terpolymer is about 1:0.5 to 1:2. The thermoplastic resin composition exhibits excellent metal adhesion, impact resistance, rigidity, and a balance of thermal stability and physical properties.

The utility model discloses a stackable battery pack structure which comprises a plurality of single battery packs stacked up and down, each single battery pack consists of a battery pack ring frame and a liquid cooling plate mounted at the bottom of the battery pack ring frame, and a battery core group is placed in a frame cavity of the battery pack ring frame. A frame upper edge ring is arranged on the top ring edge of the outer side of the battery pack ring frame, a frame lower edge ring is arranged on the bottom ring edge of the outer side of the battery pack ring frame, every two adjacent single battery packs are fixedly installed together through the frame upper edge ring and the frame lower edge ring, a liquid cooling cavity is formed in the liquid cooling plate, and the liquid cooling cavity is communicated with the liquid cooling cavity. A liquid inlet and outlet cavity hole is formed in the cavity wall of the liquid cooling cavity, and a liquid inlet and outlet pipe is installed on the outer side of the liquid inlet and outlet cavity hole. The battery pack has the beneficial effects that the space utilization rate is high, the thermal stability is strong, the structure is simplified, the integrated design of the battery pack is facilitated, the production cost is reduced, and the safety is improved.

The application discloses a cyclic olefin copolymer-benzene tricyanide composite dielectric film and a preparation method thereof, and aims to solve the problems of low energy storage density and insufficient breakdown strength of pure cyclic olefin copolymer at high temperature. The composite dielectric film comprises cyclic olefin copolymer and benzene tricyanide dispersed in the cyclic olefin copolymer, the added amount of the benzene tricyanide is 0.05wt%-0.3wt%, the preparation method is that the cyclic olefin copolymer and the benzene tricyanide are stirred and dissolved in an organic solvent and then are left to stand and defoam to obtain a casting solution, and the casting solution is prepared through flow casting and vacuum drying. The strong electron-withdrawing cyano group of the benzene tricyanide molecule constructs a deep electron trap in the free volume of the cyclic olefin copolymer. At a high temperature of 150 DEG C and a high electric field, the deep trap effectively captures the excited free electrons, inhibits the long-range migration of carriers and the conduction loss, and improves the high-temperature breakdown field strength, the discharge energy density and the service reliability of the composite dielectric film.

The application relates to the technical field of electric wire and cable, and provides a high-wear-resistance electric wire and cable and a preparation method thereof.The high-wear-resistance electric wire and cable comprises an inner core, a stress dispersion ring, a twisted constraint layer, a heat conduction layer, a diffusion layer and a wear-resistant layer which are coaxially sleeved from inside to outside, the wear-resistant layer comprises elastic connecting belts and flexible scales, the flexible scales are cross-connected to form a grid structure through the elastic connecting belts, and the wear-resistant layer is wrapped on the outside of the diffusion layer; and the inner core comprises a conductor core, an elastic porous filling layer and anti-torsion protrusions, and the elastic porous filling layer is filled between the conductor cores and on the outside. In the application, the wedge-shaped matching of the anti-torsion protrusions of the inner core and the meshing grooves of the stress dispersion ring, the elastic energy absorption of the spiral buffer strips, the structural reinforcement of the aramid belts of the twisted constraint layer, and the grid deformation matching of the elastic connecting belts and the flexible scales of the wear-resistant layer are combined, so that the torsional stress is gradedly dissipated, the wear damage is dispersed and buffered, the torsional life of the electric cable is greatly prolonged, and the surface wear resistance of the electric cable is greatly improved.

This utility model relates to a descending furnace, comprising a frame, furnace body, heating components, insulation cover, rotary lifting mechanism, sealing mechanism, crucible, and laser. The furnace body includes a furnace bottom, furnace cylinder, and furnace cover. The furnace cylinder and insulation cover are made of heat-resistant transparent optical material. The sealing mechanism is installed between a through hole and a drive shaft, and includes a flexible section configured to shorten as the drive shaft rises and extend as the drive shaft descends. An evacuation port is provided on the sealing mechanism. By employing an insulation cover and furnace cylinder made of heat-resistant transparent optical material, real-time visual monitoring of the entire crystal growth process is achieved. The sealing mechanism maintains a stable vacuum environment in the heating chamber, effectively suppressing heat loss caused by thermal radiation and convection. The laser beam promotes the nucleation and directional growth of crystal materials through light-induced effects, and simultaneously enables in-situ observation and diagnosis of solid-liquid interface morphology, interface fluctuations, and internal crystal defects.

The invention discloses a large laser gyroscope, which comprises a working platform, and a radio frequency laser, a plurality of angular cavities and a plurality of light path pipes supported on the working platform, the plurality of angular cavities and the plurality of light path pipes are sequentially and alternately connected end to end to form an annular cavity, the radio frequency laser is arranged on one of the light path pipes and is used for generating laser in the annular cavity, and the light path pipes are arranged on the other of the light path pipes. A reflector is arranged on the angular cavity and is used for reflecting the laser in the annular cavity, so that the laser forms annular resonant laser; the radio frequency laser comprises a closed gain tube and an electrode assembly, the electrode assembly comprises a first electrode connected with a radio frequency power supply and a grounded second electrode, working gas is arranged in the gain tube, and the first electrode and the second electrode are both of an annular structure and wrap the gain tube. The first electrode and the second electrode of the electrode assembly are provided with a discharge gap along the axial direction of the gain tube. The method has the advantages of low cost, high precision, high thermal stability and the like.

The invention specifically discloses an electrolyte and a lithium ion battery. The electrolyte comprises an electrolyte for first injection and an electrolyte for second injection, the first injection electrolyte comprises a first solvent, a first additive and a first lithium salt; the first solvent comprises dimethyl carbonate, the first additive comprises vinylene carbonate and a composite additive, and the composite additive comprises at least one of fluoroethylene carbonate, ethylene sulfate and methylene methanedisulphonate; the mass ratio of the dimethyl carbonate is 45%-50%; the secondary injection electrolyte comprises a second solvent, a second additive and a second lithium salt; the second solvent comprises dimethyl carbonate, and the second additive comprises vinylene carbonate; the mass ratio of the dimethyl carbonate is 45%-50%; the mass ratio of the vinylene carbonate is 15%. The lithium battery has the advantages of high energy density and long cycle performance.

This utility model relates to the field of laser scanning galvanometer technology, and in particular to a low-noise laser scanning galvanometer, comprising: a galvanometer body and a soundproof cover installed on the outside of the galvanometer body; the soundproof cover includes a main shell and a secondary shell, which are inserted into each other and fastened with bolts; wherein, sound-insulating cotton is installed on the inner surfaces of both the main shell and the secondary shell, and cooling structures are provided on both sides of the main shell. This utility model adopts a design of installing sound-insulating surfaces on the inner surfaces of both the main shell and the secondary shell to achieve sound insulation protection for the entire galvanometer body, thereby achieving a low-noise effect when the galvanometer body is working. At the same time, this application also installs a cooling structure on the outside of the main shell, so while reducing noise, it can also effectively ensure the heat dissipation stability of the internal galvanometer body during operation.

The invention provides a pressure balancing structure for a radiation source oil tank, and relates to the technical field of medical imaging equipment, the pressure balancing structure comprises an oil tank main body and a balancing bag body, at least one radiation generating mechanism is arranged in the oil tank main body, the oil tank main body is filled with an insulating medium, and the balancing bag body is arranged in the oil tank main body and is communicated with an inner cavity of the oil tank main body; wherein the balance capsule body is deformed in response to the volume change of the insulating medium caused by the temperature change, so as to maintain the pressure balance inside and outside the oil tank main body. By arranging the breathing bag in the oil tank, the volume expansion and shrinkage of the insulating oil caused by temperature change can be automatically responded, so that the internal pressure of the oil tank is always kept in dynamic balance with the external atmospheric pressure, and the problem of pressure fluctuation caused by thermal expansion and cold contraction of the oil in the oil tank is avoided.

The invention discloses a creep-resistant magnesium alloy with high elasticity modulus and high damping and a preparation method thereof, and the creep-resistant magnesium alloy with high elasticity modulus and high damping comprises the following components in percentage by mass: 1.2%-3.5% of Zn element, 2.5%-12% of Gd element, 0.5%-6% of Yb element, 0.15%-1.2% of Ni element, 0.3%-0.8% of Mn element, 0-0.5% of Cu element, 0.1%-5% of HRE element and the balance of Mg element. The HRE element is one or more of a Dy element, a Sm element and a Tb element, and the mixing enthalpy delta H of the creep-resistant magnesium alloy with the high elastic modulus and the high damping is-1.1 kJ / mol to-0.2 kJ / mol. The creep-resistant magnesium alloy with high elastic modulus and high damping is suitable for the fields of aerospace, precise instruments, transportation, 3C electronics and the like, and has remarkable technical and economic values.

The application relates to the technical field of nuclear fusion, and discloses a heat dissipation assembly and a tokamak device. The heat dissipation assembly comprises a supporting component and a heat dissipation pipeline. The supporting component comprises a first connecting seat, a second connecting seat, an elastic connecting structure and a connecting nail. The first connecting seat and the second connecting seat can move relative to each other. One of the elastic connecting structure and the connecting nail is arranged on the first connecting seat, and the other of the elastic connecting structure and the connecting nail is arranged on the second connecting seat. The second connecting seat is used for being mounted on a vacuum chamber. The elastic connecting structure comprises a first elastic piece and at least three second elastic pieces. The first elastic piece is arranged on the connecting nail, and the at least three second elastic pieces are arranged around the axis of the connecting nail. The heat dissipation pipeline is arranged on the first connecting seat and can be connected to a cladding system. In summary, the supporting component of the heat dissipation assembly can effectively guarantee the heat dissipation stability of the heat dissipation pipeline and prolong the service life of the heat dissipation pipeline.

The utility model relates to a hybrid rigid mine truck water tank cover and a rigid mine truck, and belongs to the technical field of mine car equipment, the hybrid rigid mine truck water tank cover comprises a water tank cover and a protection net assembly in bolted connection with the water tank cover, and the water tank cover is formed by welding a front panel, two side plates and a supporting framework; the protective net assembly comprises a heat dissipation net and a mold plate; the mould plate is detachably connected with the heat dissipation net; a partition plate is arranged between the heat dissipation net and the heat exchanger; the overall rigidity of the water tank cover is improved through a frame structure formed by welding the supporting framework, the front panel and the side plates, and mechanical impact and vibration under complex road conditions of a mining area can be resisted; the protection net assembly and the water tank cover are connected through bolts to achieve modular disassembly and assembly, and rapid maintenance and replacement are facilitated; through the partition plate arranged in the cavity between the heat dissipation net and the heat exchanger, a heat source is effectively isolated, hot air backflow is avoided, and heat dissipation stability is ensured.

This utility model discloses a multi-segment spliced ​​metal heat sink, comprising multiple detachably connected metal heat sink segments. Each metal heat sink segment includes a main substrate and heat dissipation fins vertically disposed on the surface of the main substrate. Adjacent metal heat sink segments are connected by a convex-concave mating structure. The convex-concave mating structure includes a boss at the rear end of the preceding metal heat sink segment and a groove at the front end of the following metal heat sink segment. The boss and the groove form an interference fit. The contact surface between the boss and the groove is coated with a thermally conductive adhesive layer with a thickness of 0.05-0.2mm. The multi-segment detachable design allows for flexible combination of lengths to adapt to different needs, saves space during transportation, and reduces costs by requiring only the replacement of damaged segments during maintenance. The convex-concave mating structure combined with the thermally conductive adhesive layer, along with the snap-fit ​​mechanism working in tandem with the convex-concave structure, reinforces the connection from the vertical direction, preventing loosening due to vibration and ensuring stable heat dissipation.

This utility model provides a wear-resistant and high-toughness composite titanium-based cermet cutting tool, relating to the field of metal cutting technology. It includes a tool head assembly, which comprises a titanium-based cermet base, a transition layer, and a composite wear-resistant coating. The composite wear-resistant coating is deposited on the surface of the tool head assembly by magnetron sputtering. The transition layer covers the outer side of the composite wear-resistant coating. The tool head assembly consists of a titanium-based cermet base, a transition layer, and a composite wear-resistant coating. The 8-12μm thick composite wear-resistant coating is applied to the surface by magnetron sputtering, effectively resisting wear and significantly extending the tool head's service life. The transition layer covers the outer side, enhancing the bonding force between the coating and the base, uniformly dispersing stress, and improving overall stability. The cutting edge on the outer side of the titanium-based cermet base has a reasonable angle design for efficient cutting. A locking groove below the base forms a tool clamping rod, providing a secure connection and facilitating installation and disassembly. This allows the tool head assembly to operate accurately and efficiently in various cutting operations, reducing maintenance costs and improving processing efficiency and product quality.

The utility model discloses a double-host glasses framework with multiplied computing power, which belongs to the technical field of image processing, two groups of Soc host units in local closed-loop operation are arranged in the glasses framework, the two groups of Soc host units respectively and independently process images of left and right eyes, a high-speed data link is arranged between the Soc host units, and the Soc host units are connected with the high-speed data link. The Soc host units undertake image processing tasks of corresponding single eyes, respectively process image data of the left eye and the right eye in parallel through the two groups of independent Soc host units to form a local closed loop, and cooperatively work by using a high-speed data link which only transmits control information; therefore, calculation power multiplication is realized while a binocular pixel path is decoupled, the display delay is remarkably reduced, and the redundancy safety of the system is improved.

This utility model relates to the technical field of engine lubrication structure, and discloses an oil cooler, including a housing with a coolant outlet pipe and a coolant inlet pipe fixedly connected to its outer wall. A heat exchanger is disposed inside the housing, and a heat dissipation assembly is disposed inside the heat exchanger. The heat dissipation assembly includes a first heat sink, disposed inside the heat exchanger, and a second heat sink on one side of the outer wall of the first heat sink. The first and second heat sinks are arranged alternately. A heat dissipation groove is formed inside the first heat sink. A heat dissipation plate is fixedly connected to the upper surface of both the first and second heat sinks. The heat dissipation plate is elongated, and multiple heat dissipation blocks, which are star-shaped, are fixedly connected to its upper surface. In this utility model, by setting the first and second heat sinks in an alternate arrangement inside the heat exchanger, the internal heat exchange density is significantly improved, and the contact area with the coolant is effectively expanded.

The invention discloses a commercial vehicle one-driving-two integrated controller power brick structure and a heat dissipation control method thereof. The commercial vehicle one-driving-two integrated controller power brick structure is specially applied to a dual-motor-driven commercial vehicle. Elements such as a filter assembly, a bus capacitor, a power module assembly and a control panel are integrated in a specific inversion brick shell, meanwhile, a heat dissipation device is arranged at the bottom of an inversion brick, a heat dissipation water channel of the heat dissipation device is designed in a U-shaped parallel mode, it is ensured that each power module is fully cooled, and uneven heat dissipation caused by too high water temperature is prevented; the heat dissipation distance is lengthened, and the heat dissipation effect is improved; a plurality of fixed-section throttling holes are formed in the water inlet position of the heat dissipation water channel, so that the pressure drop difference of the two water flow branches is reduced, and the flow limiting effect is achieved; in addition, a triangular guide structure is arranged at a branch opening of the water path to guide the flow direction of the water flow, and secondary flow equalization is carried out through a throttling hole of the power module; the water channels are designed to be unequal-width water channels, higher flow speed and higher heat exchange in the heat source area are achieved under the action of the guide ribs, and resistance and flow in the non-heat-source area are reduced.

The application discloses a layered micro-channel liquid cooling method and system based on a magnetic suction interface and relates to the technical field of micro-channel liquid cooling structures.The layered micro-channel liquid cooling method and system based on the magnetic suction interface comprises the following steps of S1, collecting and preprocessing temperature characteristic data and fluid flow velocity and pressure data, and constructing a standardized heat load trend data set;S2, evaluating the cooling liquid supply state of each layer and dynamically adjusting the liquid supply rhythm of the corresponding layer;S3, analyzing the cooling demand intensity of each layer and driving the working frequency variation of the branch pump of the corresponding layer; and S4, evaluating the coordination state of the liquid supply, heat dissipation and liquid return process of each layer and dynamically adjusting the liquid cooling control strategy.The application solves the problem that the existing liquid cooling distribution path cannot realize dynamic flow adjustment according to the heat load difference of each layer of equipment in a multi-layer server structure, resulting in uneven distribution of cooling resources and serious energy waste.

The utility model discloses a kind of water cooling liquid circulation mechanisms for pipe turning equipment, it is related to machining cooling technical field, including coolant storage tank, delivery pump and temperature regulating device, further including the shunt pipe being communicated with the delivery pump export;The end of the shunt pipe is equipped with multiple nozzles, and each nozzle is connected with shunt pipe by independent flow regulating valve;The valve core of the flow regulating valve is driven by stepper motor, and stepper motor receives signal from controller to adjust valve core opening degree;The liquid outlet direction of the nozzle is towards the working area of turning tool.The utility model provides a kind of water cooling liquid circulation mechanisms for pipe turning equipment, by flow regulating valve and stepper motor, and stepper motor adjusts valve core opening degree according to the signal of controller, to realize the accurate control of coolant flow;This design is suitable for the cooling demand under different working conditions, avoids the fluctuation of cooling effect due to unstable flow.

This invention discloses an organic electroluminescent device and display device. The organic electroluminescent device includes an anode, a cathode, and at least one light-emitting layer formed between the anode and the cathode. A hole injection layer and a hole transport region are provided between the anode and the light-emitting layer closest to the anode. The hole transport region includes a first hole transport layer and a second hole transport layer with different refractive indices. The first hole transport layer is selected from compounds of Formula 1 or Formula 3, and the second hole transport layer is selected from compounds of Formula 2. This invention's organic electroluminescent device, through improvements in film structure and material matching, ensures both material stability and carrier transport, while simultaneously improving the light field distribution through optimized optical microcavity structure, thus achieving performance enhancement. [Formula 1] [Formula 2] [Formula 3]

This invention discloses an electrically driven, buffered, traveling device for a beam-moving machine, belonging to the technical field of beam-moving machines. It includes a balance beam, mounting seats fixed to both sides of the balance beam, and traveling wheels. This invention externally mounts the drive motor on the top of the lower support, using external heat dissipation for cooling, and is equipped with a pulse-blowing dust removal system. This retains the advantages of external heat dissipation—simple structure, high heat exchange efficiency, and no need for a high-energy-consuming independent refrigeration system—while also utilizing the linkage design between the air supply mechanism and the traveling buffer action of the beam-moving machine to provide a non-powered air source for pulse-blowing. Combined with a lifting mechanism that drives the pulse air pipe to reciprocate, it achieves pulse-type dust removal from the motor surface without dead angles. The entire process requires no additional power consumption or manual cleaning, solving the problem of reduced heat dissipation efficiency caused by dust accumulation on the external motor. This ensures the stability of motor heat dissipation while reducing equipment energy consumption and maintenance costs, and improving operational reliability.

This invention discloses a high-strength, heat-resistant lithium-ion battery separator and its preparation method, belonging to the field of lithium-ion battery technology. The separator is a multilayer composite structure, comprising: a rigid porous framework membrane prepared from a rigid polymer material via thermally induced phase separation as a support layer; and a functional layer composited on the surface of the support layer. The functional layer is a gel electrolyte separator formed from a covalent organic framework material via electrospinning, containing a hierarchical porous network of micropores, mesopores, and macropores, and a flame retardant dispersed in the pores of the separator. The preparation method includes: thermally induced phase separation after melt blending, biaxial stretching and extraction, electrospinning surface deposition, flame retardant introduction, and hot pressing. The separator of this invention, through the synergistic effect of the rigid framework and the COFs gel layer, possesses high mechanical strength, high heat resistance, high ionic conductivity, and thermal runaway management functions, effectively improving the safety and cycle stability of semi-solid-state lithium-ion batteries.

The utility model discloses brake shoe hot press film, including base, the upper end place butt joint of base is provided with mould seat, the upper end place butt joint of mould seat is provided with lower mould seat, the mould seat is connected with lower mould seat through connecting device, a plurality of mould cavities are provided with the upper end place fixedly connected with a plurality of sealing devices of base at corresponding position, the upper portion of lower mould seat is provided with upper mould seat, the temperature control device is provided with the inside through -going of lower mould seat, a plurality of the mould cavities all are provided with a plurality of brake shoe templates of laminated design. The utility model has the benefit that the operator realizes multilayer hot press forming in single hole conveniently.

The application discloses a kind of modularizable integrated millimeter wave plane active phased array architecture, which is highly scalable by cascading N×M standard sub-modules in master version, and the system-level feasibility verification is completed in 2×2 sub-module array configuration;Each subarray module is arranged adjacently, and the relative sequential rotation topology of 0°, 90°, 180° or 270° is introduced;The array of the verification system subarray module adopts non-uniform spacing distribution design, and the system radio frequency link is constructed by cascading multi-channel beamforming chip and wilkinson power divider;The signal is amplified and synthesized to the total interface, and the system realizes agile scanning of beam by FPGA driving, and is packaged in active heat dissipation metal shell.The application has the characteristics of low profile and easy integration, and by irregular distribution of array elements and module rotation combination, high gain is maintained in wide-angle scanning domain, and the terminal's ability to capture and stable tracking of high-speed moving satellite is significantly enhanced.

The application provides a cooking utensil control method and control system, aiming at solving the problem that the cooking utensil in the prior art has a single reference measured temperature object when controlling the heating power of a heater, it is difficult to accurately judge the whole food heating environment, and the cooking effect is poor. The cooking utensil control method provided by the application collects four actual temperatures of a liner cavity, a liner side wall, a liner heated area and a food rack; compares the actual temperature of the liner cavity with the same time temperature of the stored liner cavity temperature change curve of the food to be cooked in real time; and controls the heating power of the heater by referring to the temperature change curves corresponding to the liner cavity, the liner side wall, the liner heated area and the food rack. By storing the temperature change curves of the four objects with the cooked food, the temperatures of the four objects are heated according to the stored temperature change curves during the heating process, and the stability of the food heating is ensured.

The application discloses a production process of a co-extrusion bidirectional stretching UV-resistant printing reflective film and relates to the technical field of reflective film preparation.The production process comprises the following steps: S1, raw material preparation; S2, co-extrusion casting; S3, bidirectional stretching; S4, surface treatment; and S5, winding.The production process of the co-extrusion bidirectional stretching UV-resistant printing reflective film adopts the "organic foaming agent and inorganic nucleating agent synergistic effect" technology to build a uniform microporous structure with a pore diameter of 0.5-3 microns in the core layer (A).The microporous structure can perform high-efficiency Mie scattering on incident light, and the reflectivity of the film is significantly improved (greater than or equal to 92%). Compared with a traditional solid white film, the microporous structure effectively reduces the light transmittance (less than or equal to 0.5%).