17results about How to "Reduce transfer efficiency" patented technology

The present application relates to the technical field of in-vehicle network communication, and discloses a lightweight and secure communication method and system between ECUs in an in-vehicle network. The communication method comprises an ECU identity authentication phase: each ECU interacts with a CAN gateway, and the CAN gateway performs batch identity authentication to verify the legality of all ECUs; a data classification phase: according to the data sensitivity, the data to be transmitted is classified as confidential data or non-confidential data; a data transmission phase: if the data to be transmitted is confidential data, the sender ECU uses a session key and an ASCON encryption algorithm to encrypt and authenticate the plaintext of the confidential data, generates ciphertext and authentication parameters, and sends a data packet containing the ciphertext and authentication parameters to the receiver ECU; if it is non-confidential data, the sender ECU uses a session key and an ASCON encryption algorithm to only sign but not encrypt the plaintext, generates an authentication tag, and sends a data packet containing the plaintext and the authentication tag to the receiver ECU. The present application takes into account the security and computational overhead of in-vehicle ECU communication.

This utility model discloses an electric vertical takeoff and landing manned aircraft, including an aluminum alloy frame, a vibration damping assembly, a right guardrail connected to one side of the aluminum alloy frame, and a left guardrail connected to the other side via a pivot seat. The vibration damping assembly includes a first carbon fiber tube and a vibration damping seat fitted on the first carbon fiber tube. The upper and lower vibration damping seats are fastened with bolts through the penetration between the first carbon fiber tube and the aluminum alloy frame. The rubber vibration damping pad absorbs high-frequency vibration energy through its own elastic deformation, effectively blocking the direct transmission of vibration to the frame. The axial anti-roll bracket forms an elastic clamp on the sleeve through rubber clips. This clamping force can be flexibly adjusted by the hardness of the rubber clips, which greatly reduces the vibration felt in the cockpit area. Both the first and second carbon fiber tubes are made of carbon fiber composite material, which has a weak ability to reflect sound waves and can reduce the transmission efficiency of propeller aerodynamic noise.

The invention discloses a high-temperature fire-resistant heat-insulation carbon fiber composite material which comprises the following components in parts by weight: 35-50 parts of wollastonite-feldspar composite powder, 25-35 parts of modified porous mullite aggregate, 12-20 parts of calcium aluminate cement, 2-8 parts of modified short carbon fibers, 1.5-2.5 parts of sodium dodecyl benzene sulfonate and 1-2 parts of sodium tripolyphosphate. The preparation method comprises the following steps: S1, weighing the wollastonite-feldspar composite powder, the modified porous mullite aggregate, the calcium aluminate cement and the modified short carbon fibers in proportion, and carrying out dry mixing; s2, adding water into sodium dodecyl benzene sulfonate and sodium tripolyphosphate, and stirring to obtain an auxiliary agent aqueous solution; s3, adding the auxiliary agent aqueous solution into the dry powder mixture, and stirring; s4, transferring the slurry into a mold for hydraulic forming; s5, the formed blank is subjected to curing, demolding, drying, high-temperature sintering and cooling, and the high-temperature fire-resistant heat-insulation carbon fiber composite material is obtained. The fire-resistant and heat-insulating carbon fiber composite material produced by the invention can improve the high temperature resistance and compression strength.

The utility model discloses a garbage incinerator hearth heat -proof heat preservation optimization structure belongs to garbage incineration equipment technical field, aims at solving traditional incinerator heat loss big, furnace wall temperature is high, the low temperature of secondary air leads to the problem such as high operating cost, low combustion efficiency, including inner furnace wall, outer furnace shell, both constitute double -deck structure, and the inner furnace wall front arch, rear arch is water cooled wall, and the vertical section is equipped with secondary air through -hole, and below is the furnace grate, the outer furnace shell and the inner furnace wall form cavity heat -proof, and its arch shell is equipped with the air extraction bin and through -hole, and the air extraction bin communicates cavity, and the through -hole corresponds with secondary air through -hole, and the fan passes through the air extraction pipe, air supply pipe and will cavity hot air as secondary air send into hearth. Meanwhile, water cooled wall and arch shell are matched through hanging block, positioning column, hanging groove, positioning groove, and are fixed with bolt, ensure that the connection is firm, and the structure realizes efficient heat -proof heat preservation and waste heat recovery, and optimizes secondary air supply, improves combustion efficiency, reduces pollutant emission and operating cost.

This utility model belongs to the field of refrigeration equipment technology, specifically providing a door seal, a refrigeration and freezing equipment, and an injection mold. This utility model addresses the problem of excessive cold leakage at the magnetic strip air bladder of existing refrigeration and freezing equipment door seals. The door seal of this utility model includes a fixing part and an air bladder part. The fixing part is used to fix the door seal to the door of the refrigeration and freezing equipment; the air bladder part is used to abut against the cabinet of the refrigeration and freezing equipment to seal the cabinet and door. The air bladder part includes a magnetic strip air bladder and a wrapping air bladder. The magnetic strip air bladder is used to house the magnetic strip. The wall of the magnetic strip air bladder away from the fixing part abuts against the cabinet and is referred to as the abutting wall. The other walls of the magnetic strip air bladder are referred to as grooved walls. The wrapping air bladder wraps around the grooved walls to prevent the grooved walls from contacting the air outside the refrigeration and freezing equipment. This utility model reduces the cold leakage at the magnetic strip air bladder of the door seal.

The utility model discloses a kind of composite wallboard of barrier cold and heat exchange, it is related to building material technical field, and its technical scheme main point is: including surface layer and base layer, the surface layer and the base layer are mutually fixedly connected with several contact layers on one side, the contact layer and with its fixedly connected the surface layer or the base layer form heat preservation cavity between, the contact layer on the surface layer and the base layer exist spacing between, the contact layer on the base layer and the surface layer exist spacing between, the contact layer on the surface layer and the contact layer on the base layer between two are line contact.The utility model is through the setting of structure, so that surface layer and base layer mainly contact through contact layer, and the contact layer contact area on two is smaller, to reduce the transmission path of heat, reduce the transmission efficiency of heat energy, make it unable to effectively conduct heat, to improve the effect of heat insulation.

The utility model provides a kind of door and window attached frame structure and door and window, hook attached frame includes: outside hook attached frame, hook attached frame heat insulation strip and inside hook attached frame;Outside hook attached frame and inside hook attached frame are connected by hook attached frame heat insulation strip and pre-buried in wall;Outside hook attached frame is connected with the outside of door and window outer frame, inside hook attached frame is connected with the inside of door and window outer frame;Inlet slot attached frame includes: outside inlet slot attached frame, inlet slot attached frame heat insulation strip and inside inlet slot attached frame;Outside inlet slot attached frame and inside inlet slot attached frame are connected by inlet slot attached frame heat insulation strip and pre-buried in wall;Outside inlet slot attached frame is connected with the outside of door and window outer frame, inside inlet slot attached frame is connected with the inside of door and window outer frame.The utility model adds heat insulation strip between door and window attached frame inside and outside structure, blocks heat conduction path, and ensures ultra-low energy consumption door and window comprehensive performance.

The utility model provides a high-voltage box and a battery pack. The high-voltage box comprises a first shell; the second shell and the first shell are connected and define a containing cavity, and a contactor is arranged in the containing cavity; each of the first shell and the second shell comprises an inner plate and an outer plate which are stacked, and the inner plates and the outer plates are connected and encircled to form a sound insulation cavity so as to block noise generated by closing and opening of the contactor; according to the high-voltage box provided by the invention, the noise generated by the contactor can be weakened by utilizing the sound insulation cavity, so that the noise transmission efficiency is reduced, the noise intensity is reduced, and the product quality of the battery pack is improved.

The application discloses a kind of ultra-high voltage busbar flexible butt joint device and method without support insulator, it is related to high voltage cable connection technical field, including insulator and two busbars, further including connecting assembly;The connecting assembly includes the butt block fixedly connected with insulator, fixedly installed with fixed frame and two arc metal rods on the butt block;Two the same end of the arc metal rod is commonly installed with a locking mechanism, and the two ends of the fixed frame are fixedly installed with two limiting mechanisms.Occupational advantages are as follows: first, arc metal rod is equipped with double elastic buffer of buffer spring, energy absorption adaptability is strong, and buffer compensation is more stable;Second, locking and bilateral limiting mechanism cooperate, realize flexible compensation and accurate location, guarantee busbar trajectory controllable;Third, abandon traditional insulator mechanical coupling design, and the anti-shock performance is greatly improved;Fourth, spring plate deformation linkage locking structure, can automatically improve busbar locking strength, more stable operation.

The utility model discloses a kind of damping device and air conditioner;The damping device includes: bottom plate, damping mechanism, support and compressor body, compressor body is connected in support, one end of damping mechanism is connected in bottom plate, the other end is connected support, damping mechanism includes long locking assembly, short locking assembly and support plate, long locking assembly is connected in the outer end of support through support plate, and short locking assembly is connected in the inner end of support through support plate, to form integral damping structure.The utility model is connected by setting the damping mechanism including long locking assembly, short locking assembly and support plate, realized the multi-path absorption and dispersion of compressor vibration energy, long locking assembly and short locking assembly are connected in the outer end and inner end of support respectively, formed the damping mechanism of inside and outside cooperation, can more comprehensively cover the vibration of different frequency and amplitude generated in the process of compressor operation, reduce the transmission efficiency of vibration to bottom plate, reduce low-frequency resonance phenomenon.

This utility model discloses a steering column mounting structure, a steering column assembly, and a vehicle. It includes a mounting bracket with a body mounting portion and a steering column mounting portion, the mounting surfaces of which are parallel. The body mounting portion is connected to the body; the steering column mounting portion is connected to the steering column. When the body is subjected to external vibration, the mounting bracket forms a torsional structure to absorb the vibration. In this embodiment, the mounting bracket torsions under vibration, forming a torsional structure. Due to the mounting bracket's torsional stiffness, its modal frequency is relatively high. The excitation energy frequency generated when the body is subjected to external vibration is typically low, and the excitation energy can only effectively excite modes with frequencies close to or the same as its own. The higher modal frequency of the mounting bracket helps reduce the transmission efficiency of external vibration energy, thus reducing the vibration transmitted from the body to the steering wheel.

The application provides an electric connection structure and an electronic device. The electric connection structure comprises a heat sink, a circuit board, an electronic component group and a heat equalizing piece. The circuit board is arranged at a distance from the heat sink. The electronic component group comprises a first electronic component and a second electronic component stacked between the heat sink and the circuit board. The first electronic component is in contact with the heat sink, and the second electronic component is in contact with the circuit board. The heat equalizing piece is located between the first electronic component and the second electronic component, and is used for absorbing heat generated by the first electronic component and the second electronic component. The heat equalizing piece can absorb the heat generated by the first electronic component and the second electronic component, the second electronic component can dissipate heat without passing through the first electronic component, the accumulation of heat in the first electronic component and the second electronic component can be reduced, the temperature of the first electronic component and the second electronic component can be reduced, the heat transfer efficiency can be improved, and the heat dissipation performance of the electronic device can be improved.

The invention discloses a battery heating system, method and device, electronic equipment and a computer program product, and relates to the technical field of electric automobiles. The method comprises the following steps: under the condition that a battery is in a charging state, detecting a battery temperature at the position of the battery; under the condition that the battery temperature is smaller than a first temperature threshold value, a locked-rotor heating mode of the motor is started, and the motor temperature at the position of the motor is detected; under the condition that the motor temperature is larger than a second temperature threshold value, a preset valve in the heat circulation pipeline is adjusted to be in a second state from a first state, under the condition of the first state, the heat transfer medium circulates independently in the first heat circulation pipeline and the second heat circulation pipeline, and under the condition of the second state, the heat transfer medium circulates independently in the first heat circulation pipeline and the second heat circulation pipeline. And the heat transfer medium circulates in a pipeline formed by the first heat circulation pipeline and the second heat circulation pipeline. According to the invention, the technical problems of invalid absorption of PTC heat and slow battery temperature rise caused by too low initial temperature of the motor in a low-temperature environment are solved.

The invention discloses a carrier wafer system with a high-temperature heat insulation structure, which is characterized by comprising a wafer main body, a temperature measuring device, a battery, a main control circuit, a box and a supporting structure, a customized high-temperature heat insulation structure is arranged in the box, the interior of the high-temperature heat insulation structure is divided into a battery independent cavity and a main control circuit cavity which are mutually independent, the battery is loaded in the battery independent cavity in a sealed mode, and the main control circuit is loaded in the main control circuit cavity in a sealed mode; the box is fixedly connected to the surface of the wafer main body through the supporting structure, and the temperature measuring device is arranged on the surface of the wafer main body and is electrically connected with the main control circuit. The device is good in stability, successfully solves the problems of inconvenience in temperature measurement, influence on a gas flow field, long cooling time and the like in the prior art, and provides a more efficient and accurate temperature measurement solution for the field of semiconductor processing.

This invention relates to the field of refrigeration equipment compressor technology, specifically disclosing a composite vibration damping device for compressors. The device includes an outer constraint unit and an inner energy-absorbing unit, with the inner energy-absorbing unit placed within the outer constraint unit and not connected to it. The inner energy-absorbing unit includes a first support plate, a second support plate, and a torsion assembly. The first and second support plates are arranged vertically, and the torsion assembly is positioned between and connected to both the first and second support plates. This composite vibration damping device for compressors solves the problem that current compressor vibration damping structures struggle to simultaneously meet the contradictory requirements of achieving low stiffness and high vibration isolation during compressor operation, and high stiffness and strong constraint when the compressor is subjected to external impacts.

The utility model provides a kind of pasted glass energy-saving reconstruction window, comprising: existing glass window, including fixed frame, opening window sash and existing glass, the existing glass is set on the fixed frame or opening window sash;Flexible warm edge strip, continuous adhesion in the whole perimeter edge of indoor side of the existing glass;Pasted glass, located indoor side of existing glass, be located on the flexible warm edge strip, and parallel with existing glass, pasted glass and the existing glass form sealed heat-insulating gas layer;Silicone structural adhesive, filled in the U-shaped embedded joint enclosed by the fixed frame or opening window sash, existing glass, pasted glass and flexible warm edge strip.The utility model provides a kind of pasted glass energy-saving reconstruction window, through the innovative design of double-glazing structure, significantly solve the deficiency of existing single glazing in heat insulation, sound insulation, safety, lighting and so on, it is a kind of simple, economic, efficient energy-saving reconstruction scheme.

The application relates to the technical field of fault resistance of cross-fault tunnels, in particular to a dynamic fault zone tunnel dynamic phase change fault resistance structure system. The structure system comprises: prefabricated pipe sections, a plurality of prefabricated pipe sections are arranged side by side; hydraulic supports, a plurality of hydraulic supports are uniformly arranged on the periphery of each prefabricated pipe section, one end of the hydraulic support is arranged on the prefabricated pipe section, and the other end is in contact with the surrounding rock of the expanded section; grouting holes, a plurality of grouting holes are arranged on each prefabricated pipe section; phase change materials, the phase change materials are injected into the space between the prefabricated pipe section and the surrounding rock of the expanded section through the grouting holes; the phase change materials comprise graded sand and gravel, clay minerals, a gelling agent and pore water; and exciters, a plurality of exciters are uniformly distributed on the inner side of the prefabricated pipe section, and the exciters are used for applying a harmonic load to the phase change materials, so that the phase change materials change into a low-shear-impedance fluid form. The structure system can significantly reduce the energy transmission efficiency of fault dislocation and avoid damage to the prefabricated pipe sections by fault dislocation energy as much as possible.