179results about How to "Meet demanding requirements" patented technology

The invention relates to a reactive polyurethane hot melt adhesive, consisting of the following raw materials in parts by weight: 10-30 parts of polyether polyol, 30-50 parts of polyester polyol, 12-16 parts of isocyanate, 6-20 parts of tackifying resin, 8-20 parts of reactive plasticizer, 1-3 parts of latent curing agent and 0.1-0.5 part of catalyst. The reactive polyurethane hot melt adhesive prepared by the invention has good bonding strength, flexibility, hot and cold shock resistance, water resistance and aging resistance, and the curing speed is improved to greatly perfect the performance of PUR (Polyurethane) adhesive.

The invention relates to high-temperature-resistant heat-insulation paint and a preparation method thereof and belongs to the technical field of materials. The paint is used for heat-insulation protection of spacecrafts. The paint comprises, by weight, 25-35 parts of epoxide resin modified organic silicon resin containing nano particles, 10-20 parts of polybenzimidazole, 5-10 parts of high-temperature-resistant inorganic nonmetal compounds, 20-30 parts of high-temperature-resistant fillers, 1-3 parts of curing agents and 5-27 parts of solvents. The paint is high-temperature resistant, low in thermal conduction, high in shock resistance, low in density, good in bonding capacity, good in comprehensive performance index and capable of guaranteeing strength and rigidity of structural materials under the high temperature condition and meeting harsh requirements of aviation and space fields.

The invention relates to an active vibration isolation platform which comprises a platform, a sensor, a controller and an electrical actuator. The active vibration isolation platform has the working principle that the sensor measures the vibrations of the groundsill and platform; the controller controls the output of the electrical actuator according to the measurement signal of the sensor and a certain control algorithm; the rotor of the motor is connected with the platform through an actuating spring, and outputs displacement or angular displacement according to the control command of the controller; the displacement output is converted to force output by the actuating spring, or the angular displacement output is converted to a moment output, thereby reducing the platform vibrations; high-frequency noise can not be transferred by the electrical actuator of the invention; and the electrical actuator of the invention has larger output stroke and output force.

The invention relates to a sampling clock generation circuit for a multichannel time interleaving analog-digital converter. The sampling clock generation circuit for the multichannel time interleaving analog-digital converter is composed of a multiphase clock generation module, a duty ratio recovering circuit and a channel selection module, wherein the multiphase clock generation module generates a multiphase clock signal required by the multichannel analog-digital converter and compensates for the a phase error of the multiphase clock signal at the same time, so that the accuracy of sampling clocks between channels of the analog-digital converter is guaranteed; the duty ratio recovering circuit conducts edge adjustment on a multiphase clock generated by the multiphase clock generation module, namely duty ratio recovery is conducted, and the output multiphase clock signal serves as a sampling clock signal of a sampling hold circuit; the channel selection module receives a control code written in through an external serial port, judges the number of required internal channels, controls the opening and closing of the internal channels and selects a multiphase clock inside a multiphase pulse module according to the control code, so that sampling clock generation is achieved under the condition that different channels are selected.

The invention discloses a double-feed antenna based on a metal frame. The antenna comprises a metal frame, a first antenna excitation and a second antenna excitation. A grounding plate used for grounding is arranged on the metal frame, the metal frame is divided into a first frame and a second frame by the grounding plate, the first antenna excitation and the second antenna excitation are located in the first frame and the second frame respectively, the first antenna excitation is coupled with the first frame to form an antenna radiation loop to further form a first antenna. The second antenna excitation is coupled with the second frame to form an antenna radiation loop to further form the second antenna. The antennas of two types are placed in a mobile terminal, the mobile phone space is fully utilized, and the rigor requirement of the smart mobile terminal for antenna space is met.

The invention provides a laser induced nanometer brazing method of a silicon carbide particle reinforced aluminum matrix composite with high volume fraction, which relates to a brazing method of the silicon carbide particle reinforced aluminum matrix composite with high volume fraction. The method comprises the following steps of: (1) preparing nano-crystal particle layers at brazed surfaces of an upper matrix and a lower matrix; (2) preparing a silver matrix, aluminum matrix or zinc matrix brazing filler metal; (3) assembling a piece to be brazed, to be specific, placing the brazing filler metal prepared in the step (2) between the brazed surfaces of the upper matrix and the lower matrix, which are treated in the step (1), so as to form the piece to be brazed; and (4) under the protection of argon, carrying out double-beam laser brazing on the piece to be brazed, so as to achieve laser induced nanometer brazing of the composite. According to the invention, high temperature cannot be generated in the welding process; the shear strength of an obtained joint can reach about 260 MPa, so as to completely satisfy electronic packaging requirements or welding requirements of other materials, which contain a large quantity of ceramic phases and for which high brazing temperature is not allowed, and products thereof. The brazing method provided by the invention is used for brazing the silicon carbide particle reinforced aluminum matrix composite with high volume fraction.

A secondary mirror support structure of a space optical remote sensor comprises a primary mirror, a secondary mirror, a primary mirror frame, a secondary mirror frame, and secondary mirror support bars, wherein the secondary mirror frame is connected with the primary mirror frame through the secondary mirror support bars, and is parallel to the primary mirror frame; the primary mirror is fixedly mounted on the primary mirror frame; the secondary mirror is fixedly mounted on the secondary mirror frame; the primary mirror is parallel to the secondary mirror; each secondary mirror support bar includes two single plates and a plurality of stiffening ribs; both ends of the single plate are respectively connected with the secondary mirror frame and the primary mirror frame; and the stiffening ribs are arranged between the two single plates of each secondary mirror support bar. The secondary mirror support structure resolves the contradiction of small obstruction ratio, light weight and high rigidity of the support bars. Under the condition of the same obstruction ratio and the same weight, the double-plate structure provided by the invention can greatly improve the rigidity and the thermal stability of the structure in comparison to the conventional single-plate structure; and the specific manifestations are that the fundamental frequency is improved by more than one time, the deformation displacement in the optical axis direction is reduced to about 10% that of the conventional single-plate structure, and the double-plate structure has lower vibration response and less thermal deformation.

The invention discloses a V-shaped drop-proof steaming box comprising a box top and a steaming chamber, wherein the steaming chamber is positioned below the box top; a V-shaped groove is mounted at the lower part of the box top; an indirect heating pipe is arranged at the lower end of the bottom of the V-shaped groove; water stopping fins are mounted on two side surfaces of the indirect heating pipe; and heat insulation cotton is arranged above the box top. The V-shaped drop-proof steaming box is used in printing industries; and a V-shaped drop-proof structure simultaneously has heating and heat insulation functions to the interior of the steaming box to ensure the stable temperature in the steaming box, and can fully meet the stringent requirements on steaming conditions for printing and dyeing carpets.

The invention relates to a screw cap with a solid lubricating coating. The lubricating coating is 15-30mum thick, and the solid lubricating paint comprises the following ingredients in percentage by weight: 2-12% of molybdenum disulfide, 3-6% of polytetrafluorethylene, 1-7% of graphite, 0-3% of graphene, 12-18% of tungsten disulfide, 8-12% of carbon monofluoride, 16-34% of epoxy resin, 18-29% of nitroresin, and 3-9% of paint additives. The lubricating coating has excellent self-lubricating property, and anti-loosening and anti-occlusion properties. The screw cap with the solid lubricating coating realizes low torque coefficient of 0.1-0.13, and high torque coefficient of 0.14-0.17, thereby meeting the special requirements of automobiles, shipbuilding, power generation and other industries on the screw cap.

The invention relates to an underground temperature measurement system. The system comprises a thermocouple, a compensating lead and a heavy hammer, wherein the compensating lead is positioned above the thermocouple, and the lower end of the compensating lead is connected with the upper end of the thermocouple; the heavy hammer is positioned below the thermocouple, connected with the lower end of the thermocouple and used for guiding the thermocouple to advance in a temperature measurement passage; and the thermocouple is a sheathed thermocouple manufactured by combined assembly of a thermocouple wire, an insulating material and a metal protective sleeve and stretching, and the length of the sheathed thermocouple corresponds to the thickness of a highest temperature interval in an underground high temperature layer to be measured. The temperature measurement system can greatly reduce the manufacturing cost of the thermocouple, effectively prolong the service life of the thermocouple and improve the automation degree of temperature measurement, and is convenient for repair and maintenance of the system per se.

The invention discloses a resource scheduling method, device and system. The method comprises the steps that a base station receives a V2X (Vehicle-to-X) semi-persistent scheduling request sent by V2X user equipment on a preset resource; and the base station learns a size of a data packet requested by the V2X user equipment according to the V2X semi-persistent scheduling request and schedules a V2X resource to the V2X user equipment according to the size of the requested data packet. According to the resource scheduling method, device and system disclosed by the invention, a demand of V2X communication for low time delay can be satisfied.

The invention relates to a high strength hot rolled plate and a production process thereof, in particular to a heavy gauge hot rolled steel plate for a roll bending forming high strength steel plate pile and a production process thereof. The invention mainly solves the technical problems of inadequate thickness, and lowcold bending performance and absorbed-in-fracture energy in the prior high strength heavy gauge steel plate. The technical proposal comprises: the heavy gauge hot rolled steel plate for the roll bending forming high strength steel plate pile comprises the following chemical components by weight percentage: 0.08 to 0.15 percent of C, 0.10 to 0.40 percent of Si, 0.30 to 0.90 percent of Mn, 0.020 to 0.040 percent of Nb, 0.010 to 0.030 percent of Ti, less than or equal to 0.025 percent of P, less than or equal to 0.015 percent of S, and the balance being Fe. The microscopic structures can be fine grain ferrites, and pearlitic structures plus a small amount of bainite structures which are dispersed; the grain size level is 11 to 14; and the banded structure level is less than 0.5. The high strength hot rolled plate is mainly used for producing the steel plate pile.

The invention particularly relates to a VPX mainboard based on a Godson processor. The VPX mainboard uses the Godson 3B eight-core processor as a platform, is 1.2 GHz-1.5 GHz in main frequency and is supportive of surface memory sticking and adaptive to an RS780E+SB710 chip set of AMD, and an SATA NAN Drive embedded flash memory single-chip hard disk is adopted; a VPX architecture is adopted, and one group of VGA signals, one group of DVI signals, one group of KB / MS signals, eight groups of USB2.0 signals, eight groups of URAT signals and four groups of 10 / 100 / 1000 MPs Ethernet signals, one group of PCI signals and one group of PCIE*16 signals can be provided. The homemade Godson 3B processor is adopted, and software and hardware are autonomous, controllable, safe and reliable; the VPX architecture and a design scheme of board hard disk carrying and surface memory sticking are adopted, so that reinforcing performance of the mainboard is improved greatly, and the mainboard has high durability, shock resistance and reliability and is enabled to meet harsh requirements of servers for military use and ensured to be capable of normally and stably working in severe field environment.

An ultra violet radiation resistant environmental protection sheathing material is mainly prepared by the following materials according to the parts by weight: 40-50 pars of polyvinyl chloride resin, 6-8 parts of trioctyl trimellitate, 4-6 parts of dioctyl sebacate, 7-9 parts of dioctylphthalate, 4-6 parts of ca-zn composite stabilizer, 1-1.5 parts of epoxidized soybean oil, 1-1.5 parts of diantimony trioxide, 1-1.5 parts of diantimony trioxide, 10-13 parts of magnesium hydrate, 8-10 parts of refined calcium carbonate, 8-10 parts of titanium dioxide, and 0.3-0.5 parts of ultraviolet absorbent. The invention technically solves the difficult point of compound formulation of the ultra violet radiation resistant white sheathing material, greatly increases the resistance to ultra violet radiation performance of the product, has strong practicability and lays the material foundation for the design and development of resistance to ultra violet radiation coaxial-cables. Based on the resistance to ultra violet radiation white polyvinyl chloride sheathing material, the resistance to ultra violet radiation environmental protection sheathing material technically solves the technical difficulties of resistance to ultra violet radiation performance, softness, UL mechanical physical property, ROHS environment requirements and the like which are difficult to be achieved completely, meets the strict requirements of the application of products on tropical and subtropical regions and has remarkable social effect.

The invention provides a rapid double power supply switch device and a working method thereof, relates to a switch used for guaranteeing power supply continuity and the working method, and can effectively solve the problems of contact arcing, electrical energy loss and the like of a conventional switch. The device comprises a frequently-used power supply, a reserve power supply, a load, a circuit breaker I, a circuit breaker II as well as a switch unit I, a switch unit II, a data acquisition module and a total control module, wherein the structure of the switch unit I or the switch unit II comprises a full control type switching element insulated gate bipolar transistor I, a full control type switching element insulated gate bipolar transistor II, an uncontrollable semiconductor device diode I, an uncontrollable semiconductor device diode II, a buffer circuit I, a buffer circuit II, a drive circuit I and a drive circuit II. Serious affects of the problems such as temporary reduction of power supply voltage, short-term voltage interruption and the like on the load are reduced, and safe and stable operation of a power supply system is guaranteed. According to the rapid double power supply switch device and the working method thereof, power supply switch time reaches a millisecond level, seamless switching can be realized, both the rapidity and the transient characteristic are ideal, and strict requirements of a sensitive and critical load on the power supply reliability and electric energy quality are really met.

The invention provides a band-gap reference voltage source design with high gain and a high rejection ratio. A band-gap reference voltage source circuit is composed of an operational amplifier circuit, a starting and biasing circuit, a rejection ratio increasing circuit and the band-gap reference voltage source circuit. A high-gain operational amplifier is adopted for effectively guaranteeing precision and stability of Delta VBE, and offset is reduced by means of multistage amplification; the starting and biasing circuit provides starting voltage and bias for the other circuits, and is closed after the other circuits are started; the rejection ratio increasing circuit increases rejection of the whole circuit on power supply change in a current feedback mode, a locally supplied power supply VDDL is generated, and anti-interference performance of the circuit is enhanced; the band-gap reference voltage source circuit increases the power supply rejection ratio of output voltage by adoption of a current mirror of a self-bias cascade structure, and coordinates with an external circuit to generate reference voltage with stable performance and zero-temperature coefficient. Due to the adoption of the high-gain two-stage operational amplifier, a voltage source isolation technique, an RC compensation network and the current mirror in the self-bias cascade structure, the circuit has low offset voltage, high phase margin, high gain and high rejection ratio, and impact caused by MOS (metal oxide semiconductor) device channel modulation effect is reduced.

The invention discloses an LCD TV power system, comprising a relay and a standby circuit which are respectively connected with an AC input, a filter circuit connected with the relay, a rectifier circuit connected with the filter circuit, and a power factor corrector circuit connected with the rectifier circuit, wherein the relay is also connected with a low power consumption standby control circuit; and the power factor corrector circuit is also connected with a DC-DC transfer circuit and a DC-AC sine high voltage transfer circuit. The LCD TV power system in the invention can provide corresponding voltage and current for each system of the LCD TV, has ultra-low standby power consumption, high voltage conversion efficiency in normal work, relatively simple system and large power of unit volume output, and fully satisfies rigorous requirements of the LCD TV on power supply.

The invention relates to the field of computer motherboard, in particular to a Loongson 3A+2H chipset computer motherboard based on VPX standard. The computer motherboard comprises a Loongson 3A quad core processor, a Loongson 2H bridge plate, a motherboard and a hard disk, wherein the main frequency of Loongson 3A quad core processor is 1 GHzz, the processor uses on-board SATA base to are connected with SATA hard disk, the capacity of hard disk is 256GB, the link table of Loongson 3A quad core processor has memory of 4G; motherboard use VPX architecture and can provide 1 group of KB / MS mouse and key interface, 8 lines of URAD signal, 1 group of VGA display signal, 1 group of DVI display signal, 6 groups of USB 2.0 data signal, 3 groups of Ethernet signal and 1 group of PCIE*1 signal; the motherboard uses domestic Loongson 3A processor and Loongson 2H bridge plate. The software and hardware of the motherboard realize autonomous control. At the same time, the motherboard uses VPX architecture, the design proposal of on-board hard disk and memory of table improves the reinforcement performance greatly.

The invention relates to a disk permanent magnet composite brushless motor. The motor comprises a stator (1), a winding (2), a static magnet adjusting ring (3), a magnet gear outer rotor (4), a rotor yoke iron core (5) and a permanent magnet (6), wherein the magnet gear outer rotor (4) is integrated with an enclosure; the permanent magnet (6) is uniformly embedded on the rotor yoke iron core (5) along a circumferential direction; the stator (1) has a disk slotting structure; the winding (2) is embedded in a stator slot; and the static magnet adjusting ring (3) has a disk structure and is arranged between the magnet gear outer rotor (4) and the stator (1). In the motor, an inner rotor is saved on the basis of the conventional magnet gear structure, so processing technology is simplified, permanent magnet materials are saved and larger vibration and noise which are produced by the inner rotor are also eliminated simultaneously.

The invention discloses an ABS (acrylonitrile butadiene styrene) / PBT (polybutylene terephthalate) / PCTG (polyethylene terephthalate glycol) composite material high in low-temperature toughness and solvent resistance. The shortcoming that ABS resin is poor in solvent resistance is overcome by introduction of PBT resin from the composite material; low-temperature falling ball impact of the composite material is greatly increased by introduction of PCTG resin, and problems about increasing density, solvent resistance performance degradation and the like due to the fact that existing PC is taken as third-component polyester are solved; a bulking agent is applied to the composite material, compatibility of the composite material can be more effectively improved especially by the adoption of an MGD comb-shaped polymer, and low-temperature falling ball toughness of the material is further improved; the composite material is good in solvent resistance, heat resistance and low-temperature falling ball performance, and strict requirements of kitchen appliances, industrial battery shells and the like can be met.

The invention discloses a method for preparing a polyetherketone foaming material by using supercritical CO2. The method specifically comprises: taking fluid CO2 in supercritical state as a physical foaming agent to perform physical foaming on polyetherketone, saturating a polyetherketone sheet material in an autoclave, and realizing foaming on the saturated polyetherketone sheet material in high-temperature oil bath to obtain a closed-cell foamed material with uniform cell distribution, wherein the cell size can be changed through the technological conditions. By taking polyetherketone as the raw material and using the green environment-friendly foaming method, the obtained high-temperature resistant polymer is not only guaranteed in the original excellent performances, but also substantially reduced in production cost, and is a foaming material with a wide application prospect.

The invention relates to a preparation method of a polyurethane hot melt adhesive adhered with a lower surface energy material. The polyurethane hot melt adhesive prepared by the method provided by the invention has favorable flexibility and body tensile strength, can overcome the influence of an expansion factor difference between different materials, and is uniform in stress distribution so as to adapt to base materials in different types; an anti-dropping performance is good: the times for dropping a roller is higher than 300 times; the adhesion strength is high: the adhesion strength of PEI and a nickel-plated steel disc is higher than 6.0MPa; salt spray resistant and ageing-resistant performances are good: no damage is caused after a salt spray test is carried out for 500 hours, and no remarkable intensity attenuation is caused after a dual-85 test is carried out for 1000 hours.

The invention discloses a die material for copper hot extrusion and a preparation process thereof. The material consists of the following components in percentage by weight: 98.8 to 99.2 percent of micron-sized fine grain Mo matrix phase and 0.8 to 1.2 percent of La2O3 / Mo5Si3 disperse phase, wherein the disperse phase is generated in situ by adding La2O3 and MoSi2 in a weight ratio of 1:1-1: 1.1 in the form of compound particles. The preparation process comprises the following steps of: mixing, compression molding of mixture, sintering, and forging. The molybdenum material has the characteristics of high strength, high toughness, low inflation ratio and the like because of synthetic actions of strengthening and toughening of the La2O3 and Mo5Si3 prepared in situ. The die material further optimizes the organizational structure and improves density and performance through subsequent forging process. Serving as the copper extrusion die material, the die material prolongs the service life to be more than 1,000 times / die so as to greatly improve production efficiency and reduce die cost.

The invention discloses a full-flexibility three-translation mixed-connection micro-active device used for in-situ observation of a scanning electron microscope. The device comprises bases (1, 2), a sample platform (3), a microscopic head bracket (4) and piezoelectric ceramic micro-driver (5a, 5b and 5c); the microscopic head bracket (4) is arranged above the sample platform (3); the full-flexibility three-translation mixed-connection micro-active device is a mixed-connection mechanism which is formed in a way that a two-degree of freedom (DOF) full-flexibility plane parallel mechanism is connected with a single-DOF full-flexibility mechanism in series; the two-DOF full-flexibility plane parallel mechanism is a micro-active translation structure in x-direction and y-direction; the single-DOF full-flexibility mechanism is a micro-active translation mechanism in z-direction. The full-flexibility three-translation mixed-connection micro-active device generates no pollution caused by the volatilization of the introduced lubricant, avoids the defects of vibration impact, friction abrasion and the like, avoids the accumulation of all errors during the testing process, and can meet the high-precision requirement.

The invention discloses media platform architecture for cloud calculation. The media platform architecture comprises an MDC pubic function module layer, an IaaS middleware uniform interface layer and a resource pool layer. The SOA structure is adopted for the resource pool layer. The same functions are abstracted from devices or software of all manufacturers. The resource pool layer comprises a plurality of resources independent of one another. The IaaS middleware uniform interface layer comprises a plurality of middleware interfaces composed of a plurality of resources, and each middleware interface provides a unique function. The MDC public function module layer comprises a plurality of public function modules composed of a plurality of middleware interfaces. By centralizing and automatically managing all service resources through a platform, the work efficiency is greatly improved, the resource utilization rate is greatly increased, and enterprises can respond to cloud calculation service requirements in a faster, more effective and low-cost mode.

The invention discloses a ruggedized modularization server, which is based on a CPCI bus architecture, wherein a whole-machine structure comprises four server units, two switching units, one sharing storage unit, one management control unit, one redundant power source unit and a CD driver. The ruggedized modularization server provided by the invention is a dedicated military ruggedized computer, which conducts targeted design to electric devices and the structure of the computer in order to let the computer satisfy rigorous requirements for a military server and guarantee normal and stable work in an outdoor wicked environment.

The invention discloses a data transmission processing system applied to a financial message language. The system comprises a channel access layer, a gateway, an interactive control layer and a service processing layer which are connected in turn; a financial message language processing device is collocated on a channel access terminal server, the gateway, an application server and a host member; the financial message language processing device processes and forwards communication data packets between the channel access terminal server and the gateway, between the gateway and the application server and between the application server and the host member so as to realize data transmission of the financial message language. The invention discloses a data transmission processing device and a data transmission processing method applied to the financial message language at the same time. The system overcomes the technical defects of the conventional XML message language and a resolver thereof, has the characteristics of efficient packing and unpacking, low CPU consumption and the like, and balances the high-performance requirements of an application service member for an interface loose coupling and a host on-line core application.

The invention belongs to the technical field for preparing a ceramic heat accumulator, and particularly relates to a method for preparing a honeycomb ceramic heat accumulator by industrial ceramic waste, comprising the following steps of: weighing 45-50% of industrial ceramic waste, 30-32% of sintered mullite powder and 20-23% of Shuozhou soil powder according to the weight proportion; grinding and homogenizing the industrial ceramic waste to be less than 300 meshes; fully mixing; adding a molding assistant, a lubricant and water; obtaining a mud material after mixing, kneading, pugging and staling; extruding the mud material to form a shape, and cutting to be biscuits; and drying and sintering the biscuits, and then obtaining the finished ceramic heat accumulator. The ceramic heat accumulator obtained by the method disclosed by the invention has excellent performances, not only satisfies usage requirement of a heating furnace in the metallurgy industry, but also reduces preparation cost, consumes waste produced in the production of the industrial ceramics and usage of the industrial ceramics, and reduces resource waste and environment pollution.