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319results about How to "Flexible structure design" patented technology
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Underwater sound source direction estimating method
The invention discloses an underwater sound source direction estimating method, comprising the following steps of: mounting acoustic-optical coupling interference type fiber optic hydrophones on an overwater onboard platform, wherein all the acoustic-optical coupling interference type fiber optic hydrophones are arranged into a uniform round array; respectively vertically emitting probing light to a water surface by using each acoustic-optical coupling interference type fiber optic hydrophone, and generating reference light simultaneously; respectively returning each path of the probing light to the original acoustic-optical coupling interference type fiber optic hydrophone after each path of the probing light is reflected by the water surface, and carrying out related demodulation on the returned probing light through the acoustic-optical coupling interference type fiber optic hydrophones, so as to obtain underwater sound source data; and using a beam forming algorithm to process the underwater sound source data demodulated by each acoustic-optical coupling interference type fiber optic hydrophone, so as to estimate and obtain a direction of the underwater sound source. With the adoption of the underwater sound source direction estimating method provided by the invention, the rapid probing of a large-range sea area can be realized, and the full-direction estimation of a direction angle and a pitch angle of the underwater sound source can be realized. The position of the fiber optic hydrophones on a sliding rail can be adjusted, so that a uniform round array can be applicable to positioning the underwater sound source with a wider frequency band range.
Owner:ZHEJIANG UNIV
Dendritic polymer with POSS group and preparation method thereof
ActiveCN103642050AWide variety of sourcesRich varietySilicon organic compoundsChemical synthesisCrystallography
The invention relates to a dendritic polymer with POSS group and preparation method thereof. The preparation of the product comprises the following steps: designing a POSS group intermediate R2-POSS-(R1)n-1 (n=6, 8, 10, 12) with asymmetric structure, and then using a chemical synthetic method, and obtaining a dendritic polymer (containing derivatives thereof) containing POSS group and a lot of end functional groups. The product has the advantages of unique structure design and diversified selections, thereby the product has latent application prospects for the aspects of surfactant, biological medicine carrier, catalyst, photon crystallization, optical material, anti-corrosion material, electronic material, information recording material, printing material, battery material, magnetic material, electronic luminescent device, etc.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Novel multi-stable ultrasonic detection sensor
ActiveCN106198724AReduce volumeEasy to integrateAnalysing fluids using sonic/ultrasonic/infrasonic wavesAnalysing solids using sonic/ultrasonic/infrasonic wavesSolid phasesImage resolution
The invention relates to a novel multi-stable ultrasonic detection sensor which is used in the field of ultrasonic detection and includes: an acoustic resistance matching layer, a metal electrode, a piezoelectric film, a high-voltage-resistant insulating layer, a hollow chamber sealing layer, a back lining layer, and an electromechanical control circuit board. The ultrasonic detection sensor can achieve a multi-stable working mode of combination of piezoelectric ultrasonic sensing and capacitive ultrasonic sensing on one ultrasonic transducer unit through the electromechanical control circuit board, wherein each stable working mode can be designed according to optional ultrasonic frequencies, for example, a design scheme of capacitive low frequency ultrasonic sensing and piezoelectric high frequency ultrasonic sensing, thus considering both the depth and resolution of ultrasonic detection. The multi-stable ultrasonic detection sensor can be flexibly applied in ultrasonic detection on gas-phase, liquid-phase and solid-phase mediums, is simple in resistance matching, is small in size and is easy to integrate, can be produced in large scale and is low in cost, and has application prospects in the fields of underwater acoustic detection, bio-medical imaging, industrial ultrasonic non-destructive testing, etc.
Owner:CHONGQING UNIV
Piezoelectric ceramic driver for optical focusing and zooming of mobile phone
InactiveCN102097971ACooperate wellSimple structurePiezoelectric/electrostriction/magnetostriction machinesTelephone set constructionsElectricityLinear motion
The invention relates to the field of piezoelectric ceramic drivers, in particular to a piezoelectric ceramic driver for optical focusing and zooming of a mobile phone. The structure of the piezoelectric ceramic driver comprises a disc stator at the center, a piezoelectric ceramic plate stuck to the surface of the stator, and a mobile body in threaded fit with the stator, wherein the piezoelectric ceramic plate is of a thin ring shape, and upper and lower surface electrodes of the ring-shaped ceramic are of fan-shaped quarter shapes; and when electrical signals are introduced to the surfaces of four fan-shaped regions of the piezoelectric ceramic, continuous driving force is formed on the internal thread of the disc stator to propel the mobile body to rotate spirally relative to the stator so as to realize axial linear motion. The manufacturing process is simple and suitable for industrialized production; compared with the prior art, the piezoelectric ceramic driver is easily microminiaturized, the output performance of an executor is more stable, and the piezoelectric ceramic driver has broad application prospect in the fields of optical focusing, precision driving and micro systems. Particularly, the piezoelectric ceramic driver can realize double effects on focusing and zooming in an embedded lens of the mobile phone or a notebook computer.
Owner:TSINGHUA UNIV +1
Miniaturized ultra wide band filter with two-notch features
InactiveCN105762465ASmall sizeGood in-band performanceWaveguide type devicesDielectric substrateEngineering
The invention provides a miniaturized ultra wide band filter with two-notch features, which is composed of two input / output ports, a dielectric substrate, an upper-layer microstrip structure and a bottom metal grounding board of the dielectric substrate, wherein the upper-layer microstrip structure comprises two uniform transmission line units, two first parallel coupled feeder lines, a stepped impedance resonator, a loaded T-type stub and two bandstop units, each bandstop unit comprises an open-loop stepped impedance transmission line and a short circuit stub, and short circuit is realized via a metallized through hole; the bottom metal grounding board comprises a first defect unit, a second defect unit, a first metallized through hole, a second metallized through hole and a grounding metal unit; and the two input / output ports are respectively connected with the upper-layer microstrip structure and the bottom metal grounding board of the dielectric substrate. Through coupling the two bandstop units with the parallel coupled feeder lines respectively, notch features can be realized, and the filter of the invention has the advantages of compact structure, high frequency selectivity and the like.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Casting method of magnesium alloy casting
InactiveCN103231016AGuaranteed decompositionGuaranteed fillingFoundry mouldsFoundry coresInterfacial reactionCasting mold
The invention provides a casting method of a magnesium alloy casting. With the method, advantages of different casting methods are utilized, and defects of the methods are overcome. With a special shell preparation method and a method for preventing magnesium alloy-casting mold interfacial reaction, a unique casting technology suitable for thin-wall complex magnesium alloy part production is formed. The method has important significance for developing magnesium alloy performance advantages and satisfying automotive magnesium alloy application requirements.
Owner:HUBEI UNIV OF AUTOMOTIVE TECH
Measurement system and method for detecting orientation and size of underwater target on basis of laser sound source
ActiveCN104808208AAvoid disadvantagesAvoid attenuationUsing subsonic/sonic/ultrasonic vibration meansUsing optical meansSound sourcesFrequency spectrum
The invention discloses a measurement system and method for detecting the orientation and the size of an underwater target on the basis of a laser sound source. According to the measurement system and method, the sound source is generated through lasers, laser energy is converted into sound wave energy, an acousto-optical coupling interference type optical fiber hydrophone array serves as a receiving sensor, the defects that in the optical measurement process, optical waves which are used are large in attenuation and the measuring distance is short are overcome, the defects of a sonar sensor in traditional acoustics detection are overcome, and the advantages that mobility and flexibility are high are achieved. Meanwhile, a sound source signal is generated through a laser-induced sound system, and generated sound signals have the advantages of being high in sound pressure level, wide in frequency spectrum, capable of conducting non-contact type control, and the like. An acousto-optical coupling interference type optical fiber hydrophone is used as the acoustic signal sensor, and the acoustic signal sensor has the advantages of being capable of detecting underwater acoustic signals in the non-contact mode, high in mobility, small in size, flexible in structural design, and the like.
Owner:ZHEJIANG UNIV
Forming method of current divider
InactiveCN101097232AReduce feverSmall temperature coefficientTime integral measurementElectrical resistance and conductanceShunt Device
The invention discloses a forming method of diverter used in electric energy meter, specially a forming method of diverter made by resistance metal material and conducting metal material. The purpose of the invention is providing a forming method of diverter whose operation is easy, performance is stable, and efficiency is high. The method includes three steps of selecting material, welding and punching figuration. The forming method of diverter possesses characters that course of production is unpolluted, precision is high.
Owner:TONGXIANG WEIDA ELECTRONICS
Large stroke pricision working platform device and drive method
A precise work piece table with large stoke is prepared as connecting fluid-dynamic driving fine mechanism to back of rough moving mechanism through load connection head and rough moving mechanism to load carry platform through said head, using moving guide track of rough moving mechanism and said platform together with fixed guide track to form relative movement pair, fixing position detector and fixed track as well as fine moving mechanism on base, carrying position detector and fixed track as well as fine moving mechanism on base, carrying rough-positioning by rough moving mechanism under control of controller then using fine moving mechanism to carry out fine-positioning till positioning goal is realized.
Owner:许宏
Uninterruptable power supply management system of lithium battery
InactiveCN105553030AAvoid redundancyLow costBatteries circuit arrangementsEmergency protective circuit arrangementsSupply managementEngineering
The invention relates to an uninterruptable power supply management system of a lithium battery. The uninterruptable power supply management system comprises a DC / DC converter, a central control unit, a temperature detection unit, a current sampling monitoring unit and a voltage sampling balance unit, wherein the temperature detection unit, the current sampling monitoring unit and the voltage sampling balance unit are respectively used for detecting temperature, current and voltage of the lithium battery and sending the detected temperature, current and voltage parameters to the central control unit, the central control unit is used for judging the state of the lithium battery according to the detected temperature, current and voltage parameters and controlling on / off of a lithium battery protection circuit through the DC / DC converter according to state information of the lithium battery, and the uninterruptable power supply management system is characterized by being directly used for acquiring temperature, current and voltage information of the battery and switching on / off the lithium battery protection circuit. By the system, all acquisition units and control units are integrated into an uninterruptable power supply (UPS), the optimal resource configuration is achieved, the hardware redundancy is avoided, and the cost is saved.
Owner:DONGGUAN UNIV OF TECH +1
Dendritic polyketal as well as preparation method and application thereof
ActiveCN103804693ARegular structureWide range of potential applicationsOther foreign material introduction processesPharmaceutical non-active ingredientsChemical synthesisMedical diagnosis
The invention relates to dendritic polyketal as well as an application thereof and a preparation method of the dendritic polyketal and a derivative. According to the preparation method, firstly, a monomer R1-ketal-R2 containing a ketal group which is highly sensitive to acid is designed, and subsequently the dendritic polyketal (including the derivative) which is tidy in structure, contains a great amount of tail end active groups or molecules, is highly sensitive to acid and has the structure of the formula in the specification is obtained by using a chemical synthesis method. Due to the property of high sensitivity to acid and the unique structure and property advantages of a dendritic polymer, the dendritic polyketal has a wide potential application prospect in fields such as biologic medicine carriers, gene transfection, bioimaging and medical diagnosis.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Piezoelectric driving type variable-diaphragm dimming apparatus and method
ActiveCN107462963ADimming method is simpleFlat and compact structureMountingsInterference fitCantilevered beam
The invention discloses a piezoelectric driving type variable-diaphragm dimming apparatus and method. The apparatus is composed of a variable diaphragm unit, a piezoelectric actuator and a pedestal. The piezoelectric actuator consists of four cantilever beams and eight piezoelectric ceramics; the four cantilever beams employ square ring beam structures formed by end-to-end connection of metallic elastic base bodies; driving feet in an interference fit relationship with the outer wall of a moving ring of the variable diaphragm unit are arranged at the midpoints of the inner wall of the four cantilever beams; and the eight piezoelectric ceramics are arranged on the outer wall of the two sides of the midpoints of the four cantilever beams correspondingly. When the apparatus works, excitation signals with a phase difference of 90 degrees are applied to the two piezoelectric ceramics on each beam, elliptic motion is caused at the driving feet, the moving ring is driven to make rotation, and thus a diaphragm piece is driven by the moving ring to rotate, so that expansion or contraction of the aperture of a through hole is realized. According to the invention, with piezoelectric driving, the piezoelectric driving type variable-diaphragm dimming apparatus has advantages of flat and compact structure, small size, light weight, high adjustment precision, fast speed, and high reliability; the performances of the optical instrument are improved; and the production cost is lowered.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Loudspeaker box
InactiveCN108924710AImprove acoustic performanceIncrease cavity volumeSingle transducer incorporationMicrophonesResonant cavityEngineering
Owner:AAC TECH PTE LTD
Cell phone capable of receiving and transmitting multi-frequency-band signal
ActiveCN102801832AFlexible structure designReduce volumeTransmissionTelephone set constructionsAntenna designMulti band
The invention discloses a cell phone capable of receiving and transmitting multi-frequency-band signal, and the cell phone comprises a baseband chip, a radio frequency circuit, a first antenna and a second antenna, wherein the first antenna and the second antenna have different work frequency bands; one end of the radio frequency circuit is respectively connected with the first antenna and the second antenna; and the other end of the radio frequency circuit is connected with a phase circuit of the baseband chip. According to the cell phone capable of receiving and transmitting the multi-frequency-band signal disclosed by the invention, each antenna does not bear a task of receiving and transmitting radio frequency signals of a plurality of the frequency bands in the prior art, so that the defect in the prior art that the design of a single antenna requires that the antenna has a larger size is overcome and the space in a cell phone shell can be more effectively utilized; and therefore, the structural design of the cell phone is more flexile, the volume of the cell phone is convenient to reduce, and the portability of the cell phone is improved.
Owner:HUAQIN TECH CO LTD
Internal supporting positioning device for girth welding of flange plates of carrier rocket tanks
ActiveCN106392451AAvoid piercingWeld firmlyWelding/cutting auxillary devicesAuxillary welding devicesEngineeringRocket
The invention relates to the field of processing technology equipment for aerospace products, in particular to an internal supporting positioning device for girth welding of flange plates of carrier rocket tanks. The internal supporting positioning device comprises a power mechanism, a circumferential overall rotating mechanism, a radial supporting-tightening mechanism and an axial pressing mechanism. One end of the circumferential overall rotating mechanism is coaxially and fixedly installed at one end of the power mechanism. The radial supporting-tightening mechanism is coaxially and fixedly installed at the other end of the circumferential overall rotating mechanism. The axial pressing mechanism is coaxially and fixedly installed at the other end of the radial supporting-tightening mechanism. External workpieces are fixed between the radial supporting-tightening mechanism and the axial pressing mechanism in the axial direction. The power mechanism drives the circumferential overall rotating mechanism to achieve rotating movement of the workpieces in the axis directions of the workpieces. The device can internally support and tighten the two welded workpieces simultaneously, coaxiality adjustment is completed while supporting and tightening are conducted, the welded workpieces can be clamped in the axial direction, and the device needs to have enough structural rigidity so that welding deformation of products can be borne and reduced.
Owner:CAPITAL AEROSPACE MACHINERY +1
Light detector of semiconductor quantum well
InactiveCN102709346AReduce distanceEasy to adjustSemiconductor devicesSemiconductor quantum wellsFrequency spectrum
The invention belongs to the technical field of light wave detectors, and particularly relates to a light detector of a semiconductor quantum well. The detector comprises a semiconductor layer, a quantum layer and a layer of a subwavelength periodic structured metal film. The quantum well at least comprises two energy levels and has a certain carrier concentration. Incident light wave with a certain spectrum width enters the semiconductor layer vertically or obliquely; the incident light wave stimulates the periodic structured metal film / a surface plasma of a quantum well interface; the surface plasma is absorbed by the semiconductor quantum well and an electronic subband transition process is generated; and the transited electrons form current signals under the externally applied bias voltage. According to the light detector of the semiconductor quantum well disclosed by the invention, the detection efficiency can be greatly improved.
Owner:FUDAN UNIV
Photonic crystal vertical cavity surface emitting laser with single module, large power and low divergence angle
ActiveCN101588017AFlexible device structure designIncrease the areaLaser detailsSemiconductor lasersVertical-cavity surface-emitting laserDefect region
The invention relates to the technical field of semiconductor optoelectronic devices, and discloses a photonic crystal vertical cavity surface emitting laser with a single module, large power and a low divergence angle; the photonic crystal vertical cavity surface emitting laser consists of a lower electrode, a n-type underlayer, a lower DBR, an active layer, an oxidation layer, a defect cavity structure of which the surface is etched with a photonic crystal pattern, an upper DBR of an annular light emitting region, a p-type cover layer and an upper annular electrode from bottom to top, wherein a photonic crystal region of the surface of the upper DBR of the photonic crystal vertical cavity surface emitting laser has a high loss region and a coupling region; an annular region and a defect region are light outputting regions; and the electrode of the photonic crystal vertical cavity surface emitting laser is formed on the surface of the p-type cover layer of the upper DBR and the lower surface of the n-type underlayer through vapor deposition. The photonic crystal vertical cavity surface emitting laser is utilized to improve the outputting power of the single module and inhibit the divergence angle.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Spring probe and probe card having spring probe
ActiveUS20170082656A1Excessive deflectionStable performanceCoupling device connectionsElectrical measurement instrument detailsContact padEngineering
A probe card includes a probe seat having upper and lower dies and a probe accommodating hole, a spring probe inserted through the probe accommodating hole and including a spring sleeve having upper and lower non-spring sections, and a circuit board disposed on the upper die and having a contact pad against which the spring probe is abutted. At least one of the upper and lower dies has a stopping surface partially facing the probe accommodating hole and an extended portion inserting hole in alignment with the probe accommodating hole. At least one of the upper and lower non-spring sections has a cylinder portion abutted on the stopping surface and an extended portion inserted through the extended portion inserting hole.
Owner:MICROELECTRONICS TECH INC
Toroidal cavity resonator based ultra wide band (UWB) notch filter
ActiveCN103035985AIndependent control of passband widthEnhanced inhibitory effectWaveguide type devicesOut of band rejectionEngineering
The invention discloses a toroidal cavity resonator based ultra wide band (UWB) notch filter which comprises a micro-strip substrate, a front face part, a reverse face part, and input\output terminals. The toroidal cavity resonator based UWB notch filter is characterized in that the front face part and the reverse face part are respectively located on the two faces of the micro-strip substrate, the reverse face part is used as a metal grounding plate of the filter, the number of the input\output terminals is two, and the input\output terminals are respectively a first input\output terminal and a second input\output terminal. The toroidal cavity resonator based UWB notch filter has the advantages of being small in size, wide in band, good in out-of-band rejection, controllable in model, good in notch properties, and the like.
Owner:广州桑瑞科技有限公司
Compound parabolic concentrator (CPC) solar energy concentration and photovoltaic power generation combined application device
InactiveCN102628613AImprove power generation efficiencyReduce heat loadSolar heat devicesPhotovoltaicsEngineeringElectric power
A compound parabolic concentrator (CPC) solar energy concentration and photovoltaic power generation combined application device relates to a solar energy concentration and photovoltaics combined application device, belongs to the technical field of solar energy application, aims at separately using infrared light and visible light in solar radiation energy, and has good utilization efficiency. A solar photovoltaic battery, foam quartz glass and quartz glass are sequentially arranged on the inner surface of a CPC, wherein visible light is covered on the quartz glass in plating mode to reflect feature films of infrared. Reflected infrared waves enter a heat absorber to be converted into heat energy, visible light penetrates through the quartz glass and is reflected and refracted for multiple times by the foam quartz glass and uniformly irradiated onto the surface of the solar energy, and electric power is output. According to changes of sunlight incident angles, distribution proportion of optothermal quantity and photoelectrical quantity of a system is adjusted. The CPC solar energy concentration and photovoltaic power generation combined application device comprehensively uses solar energy, can provide heat energy and power supply power, is simple in processing and operating, and has huge application potential.
Owner:HARBIN INST OF TECH
Bent oscillator stimulated rotary ultrasonic motor and electric excitation mode thereof
InactiveCN102710167ACompact layoutIncrease output powerPiezoelectric/electrostriction/magnetostriction machinesElectric machineEngineering
The invention discloses a bent oscillator stimulated rotary ultrasonic motor and an electric excitation mode thereof. The rotary ultrasonic motor comprises a stator assembly, a rotor assembly and a rotation shaft arranged along the axial direction of the stator assembly, wherein the stator assembly and the rotor assembly are coaxially arranged; the stator assembly comprises a metal ring body and four piezoelectric bent oscillators; the metal ring body comprises an upper circular ring; four connecting feet are evenly distributed on the circumferential direction of an upper circular ring and are correspondingly connected with the four piezoelectric bent oscillators one by one; the four piezoelectric bent oscillators are evenly distributed at 90 degrees in a rotating mode around the center shaft of the metal ring body; and meanwhile, the length direction of each piezoelectric bent oscillator is tangent with the circumferential direction of the upper circular ring. Therefore, according to the invention, the rotary ultrasonic motor can realize forward and reverse rotation motion, and has high-power output characteristic and an electric excitation mode. The bent oscillator stimulated rotary ultrasonic motor has the characteristics of stable performance, high output power, compact structure, single requirement on a ceramic chip and low processing and assembling requirement.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Laser radar
ActiveCN108872965AFlexible structure designGet rid of physical size constraintsBundled fibre light guideElectromagnetic wave reradiationRadarLaser light
The invention provides a lase radar. That lase radar comprises a laser light source and a laser emission optical system. The laser light source is a distributed emission light source. The distributedemission light source comprises a laser, a coupling optical fiber and an optical fiber fixture. The laser is used for emitting detection light. One end of the coupling optical fiber is coupled with the laser, and the other end is a light emergent end face. The optical fiber fixture is used for fixing the light emergent end face, and the optical fiber fixture is co-arranged with the light emergentend face of the coupling optical fiber so as to control the light emergent direction of the light emergent end face. The light emitted from the light emergent end face is incident to the laser emission optical system. According to the lase radar, the lase circuit is arranged at any position where the space is easy to dissipate heat by virtue of the flexible characteristics of the optical fiber, and the optical fiber is pulled out and arranged on the focal plane so that the luminous area and the heating area of the laser radar are separated and the structural design of the laser radar is more flexible.
Owner:HESAI TECH CO LTD
Substrate integrated coaxial line (SICL) resonant cavity gap-based asymmetric circularly-polarized antenna device
InactiveCN108258401ASimple structureLow costAntenna arraysRadiating elements structural formsMicrostrip patch antennaDielectric
The invention relates to the technical field of a circularly-polarized antenna sensor device, in particular to a substrate integrated coaxial line (SICL) resonant cavity gap-based asymmetric circularly-polarized antenna device. The SICL resonant cavity gap-based asymmetric circularly-polarized antenna device is characterized by being formed by combining a dielectric integrated coaxial line resonator cavity slot antenna and a broadband E-shaped microstrip patch antenna, a lamination structure is arranged between the dielectric integrated coaxial line resonator cavity slot antenna and the broadband E-shaped microstrip patch antenna and is implemented by a printed circuit technology, the dielectric integrated coaxial line resonator cavity slot antenna forms a polarization port, the broadbandE-shaped microstrip patch antenna is used as a polarization port orthogonal to the polarization port, the two polarization ports are asymmetric, the two polarization ports form an orthogonal radiationfield in space, and a dual-polarization working mode can be generated. The dual-polarization antenna structure is simple, is relatively low in cost, is suitable for occasions of dual-polarization radar, a communication system and the like, has platform applicability and is widely applied to the field.
Owner:HARBIN INST OF TECH AT WEIHAI
UV-cured self-repairing polyurethane acrylate coating and preparation method thereof
InactiveCN113072874AFlexible structure designQuick fixPolyurea/polyurethane coatingsPhotoinitiatorImide
The invention discloses a UV-cured self-repairing type polyurethane acrylate coating and a preparation method thereof. The polyurethane resin coating is prepared from, by mass, 20 to 35 parts of diisocyanate, 40 to 55 parts of polymer polyol, 3 to 5 parts of a micromolecular diol chain extender, 5 to 12 parts of a functional end-capping reagent composition, 0.03 to 0.05 part of a polymerization inhibitor, 0.05 to 1 part of a catalyst, 0.5 to 3 parts of a photoinitiator, 0.5 to 2 parts of other auxiliaries, 10 to 20 parts of a diluting monomer and 60 to 100 parts of a solvent. The UV-cured polyurethane acrylate is flexible in structural design, the functional end-capping reagent adopts a composition containing three groups, namely furfuryl, maleimide and acrylate, and the furfuryl and the maleimide can form a dynamically reversible Diels-Alder covalent bond, therefore, the UV light-cured polyurethane acrylate coating prepared by the preparation method disclosed by the invention not only has higher glossiness and transparency, but also has better tensile strength, hardness and wear resistance, and also has good self-repairing performance.
Owner:南阳金牛彩印集团有限公司 +1
Travelling wave driven prezoelectric ceramic pump capable of realizing forward-reverse fluid flow
InactiveCN1710280AEasy to operateReduce mechanical wearPumpsPositive-displacement liquid enginesElectricityBack pressure
The invention relates to flow pump technique field in precise machine which features that the circle edge of pump body is processed with slots on both upper and lower side, and with several through holes in slots; the slot is sealed by upper and lower pump cover forming a flow channel; upper and lower piezoelectric ceramic plate pasted respectively on the upper and lower side of the pump body, moreover the upper and lower pieces is one fourth wavelength different along the circle, generating a needed traveling wave fluctuate in upper and lower slots while working; flow inlet port and outlet port placed on the same or different sides of the ceramic pump, and block is just between the two port ensuring the flow enters from the inlet port and leaves from the outlet port. The flow direction is controlled by the phase difference of the two exterior power source while the flow amount, speed and back pressure with width, frequency and phase position. It is of low sealing requirement, high reliability, fine flow block performance, handily operation and the working frequency is above 10 KHz.
Owner:TSINGHUA UNIV +1
Washing machine having honeycomb and flexible friction washing devices
InactiveCN1632213AHigh strengthFlexible structural designOther washing machinesControl devices for washing apparatusWoolHoneycomb
The present invention relates to washing machines, in particular to washing machines with a new washing mechanism. The characteristics are: the material used for the washing mechanism, that is, the inner cylinder, the pulsator, etc., is linear low-density polyethylene, or vinyl chloride-acrylonitrile copolymer; the wall and bottom of the washing inner cylinder are evenly distributed with honeycomb holes. The expected performance of the invention is to achieve a cleaning ratio of 0.7-1.5, a wear rate of less than 0.10%, a wide range of washable clothes, a good protective effect on woolen clothes, and a particularly high washing effect on heavy clothes (such as blankets).
Owner:魏东红
Logic backup method and logic backup system for database
ActiveCN103226501AImprove securityImprove logical backup efficiencyRedundant operation error correctionSpecial data processing applicationsDistributed computingNetwork segment
The invention provides a logic backup method and a logic backup system for a database. The method comprises the following steps: a network segment centralized deployment node sends logic backup requests to a plurality of nodes of a production server; the nodes of the production server achieve logic backup of production data according to the logic backup requests so as to obtain backup data; the production server sends operation information and backup logs, which are generated in the logic backup process, to the network segment centralized deployment node; the network segment centralized node collects a plurality of backup logs to generate log information; a center node grabs the log information and the operation information on the network segment centralized deployment node; the center node analyzes the log information to obtain analysis result information; and the center node analyzes the operation information to acquire analysis result. The invention solves the difficult technical problems in the prior art that the management of the backup system is decentralized, the quantity of backup operation is large and operation and maintenance are cumbersome.
Owner:INDUSTRIAL AND COMMERCIAL BANK OF CHINA
High-capacity lithium ion battery power supply system for well emergency risk avoiding lifesaving facility
InactiveCN103928948ARealize managementAchieve scalabilityBatteries circuit arrangementsElectric powerElectrical batteryEngineering
The invention relates to a high-capacity lithium ion battery power supply system for a well emergency risk avoiding lifesaving facility. A master control apparatus is connected with a charge and discharge apparatus and a power supply apparatus; the charge and discharge apparatus is connected with the power supply apparatus; the master apparatus receives power supply state signals of the charge and discharge apparatus and the power supply apparatus, controls the charging of the charge and discharge apparatus and the battery management of the power supply apparatus through a CAN bus and, performs voltage conversation on external commercial power for supplying to the risk avoiding lifesaving facility, and is also provided with a liquid crystal display function; the charge and discharge apparatus performs logic control of charge and discharge according to the control command of the master control apparatus; and the power supply apparatus performs power supply management according to the control instruction of the master control apparatus and is used for finishing uninterrupted power supply to the risk avoiding lifesaving facility in case of abnormal external power supply. The advantages are as follows: the structural design is flexible, a master-slave type control mode is employed, a subordination control panel and a battery pack are arranged in a power supply explosion-proof case, information data exchange is finished through the CAN bus and a master control board, and management and expansion of multiple power supply modules are realized flexibly.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Stitch skipping prevention device for textile use
InactiveCN105110086AReduce jumpingSmooth transmissionFilament handlingTextiles and paperYarnEngineering
The invention relates to a stitch skipping prevention device for textile use. The stitch skipping prevention device comprises a base, a traction device and a guiding device, wherein the traction device and the guiding device are parallelly arranged at the upper end of the base; the traction device comprises a pedestal A, a tension spring and a threader A, which are sequentially arranged on the base from bottom to top, a through hole A allowing a yarn to pass through is formed in the threader A, and the two ends of the through hole A are circular-arc-shaped; and the guiding device comprises a pedestal B arranged on the base and a threader B hinged to the upper end of the pedestal B, a through hole B allowing the yarn to pass through is formed in the threader B, and the two ends of the through hole B are circular-arc-shaped. The stitch skipping prevention device for textile use has the advantages as follows: as the stitch skipping prevention device for textile use mainly comprises the traction device and the guiding device, and the tension spring is arranged on the traction device, skipping of yarns is reduced to a certain extent; the guiding device adopts a fixed structure and enables the yarn to be stably transferred, and the traction device and the guiding device are used together to realize accurate and stable guiding; and meanwhile, as the end parts of the through holes in the threaders are circular-arc-shaped, the yarn is prevented from breakage, and the structure is reasonable.
Owner:HAIAN TEXTILE MACHINERY
Fluorescence enhanced chip based on all-medium artificial microstructure super-surface
PendingCN109374591ASolve the problem of low fluorescence efficiencySolving the Fluorescence Efficiency ChallengeFluorescence/phosphorescenceQuantum efficiencyResonance wavelength
The invention discloses a fluorescence enhanced chip based on an all-medium artificial microstructure super-surface. An upper layer of the chip is composed of periodically-arranged nano-medium columnclusters, and a lower layer is a medium substrate; the refractive index of the upper layer is greater than that of the lower layer; the collective magnetic dipole resonance wavelength and the collective electric dipole resonance wavelength of the chip satisfy that one is equal to the excitation wavelength of a fluorescent marker, and the other is equal to the radiation wavelength of the fluorescent marker. In the periodically-arranged nano-medium column clusters, each of periodic units is a square or a regular hexagon of the same size; four nano-medium columns of the same size are contained ineach of the periodic units. The fluorescence enhanced chip disclosed by the invention has the benefits that a fluorescence signal is simultaneously enhanced from three aspects of enhancing an excitation light local field, improving the radiation quantum efficiency and improving the fluorescence collection efficiency, so that the detection sensitivity of the fluorescent marker is greatly improved.The whole chip is arranged on a low-refractive index substrate and has the advantages that the material loss is low, the preparation is simple, and the structure size can be changed to work in different wavebands.
Owner:ZHEJIANG UNIV
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