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122results about How to "Reduce the modulus of elasticity" patented technology
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Bonding structure with compliant bumps
InactiveUS6972490B2Reduce the modulus of elasticityReduce pressurePrinted circuit assemblingSemiconductor/solid-state device detailsBonding processEngineering
A bonding structure with compliant bumps includes a stopper structure and a protection layer. Compliant bumps include at least a polymer bump, a metal layer and a surface conductive layer. Both the stopper structure and protection layer are formed with polymer bumps and metal layer. Compliant bumps provide bonding pad and conductive channel. Stoppers are used to prevent compliant bumps from crushing for overpressure in bonding process. The protection layer provides functions of grounding and shielding. The stoppers can be outside or connected with the compliant bumps. The protection layer has thickness smaller than the stopper structure and compliant bumps. It can be separated or connected with stoppers.
Owner:IND TECH RES INST
System for measuring thrust suitable to thrust engine with tiny space
InactiveCN1916580AEliminate frictionGuaranteed distanceEngine testingApparatus for force/torque/work measurementDriver circuitTransducer
A thrust measuring system of thrust engine used in small space comprises storage tank of thrust agent, engine, mechanical body, transducer, driving and controlling circuit. It is featured as setting transducer at external side of one end on working beam and balance weight block on another end; placing said driving and controlling circuit in horizontal trench of front and back support beams; arranging engine on connection piece; connecting one end of thrust agent tube to engine and another end to thrust agent storage tank; forming mechanical body by support frame, master shaft, working beam, thrust component and balance weight.
Owner:BEIHANG UNIV
Sensitive structure and accelerometer with super-high acceleration displacement sensitivity and manufacturing method
ActiveCN105858585AReduce the modulus of elasticityReduce maximum stressPrecision positioning equipmentDecorative surface effectsCantilevered beamGrating
The invention discloses a sensitive structure and accelerometer with super-high acceleration displacement sensitivity and a manufacturing method. The micromechanical sensitive structure comprises a sensitive mass block, a high-reflective film plated on the sensitive mass block, an S-shaped beam type cantilever beam connected to the sensitive mass block and a silicon substrate connected with the tail end of the S-shaped beam type cantilever beam. The lower portion of the micromechanical sensitive structure is connected with a substrate with a groove. The S-shaped beam type cantilever beam is mainly formed by sequentially connecting four straight beams of a thigh beam, a first curved beam, a second curved beam and a shank beam. The sensitive mass block and the silicon substrate are both made of SOI substrates. The cantilever beam is made of a monocrystalline silicon device layer in the SOI substrate. According to the sensitive structure and accelerometer, the super-high acceleration displacement sensitivity is achieved, small off-axis crosstalk can still be kept, a micromachining process and an IC process can be compatible, the substrate conveying rate is high, mass manufacturing is easy, and in cooperation with a displacement reading-out system based on a grating interference cavity, super-high acceleration measuring sensitivity and precision can be achieved.
Owner:ZHEJIANG UNIV
Five-bit radio-frequency MEMS phase shifter
InactiveCN101694896AReduce board weightReduce the modulus of elasticityTelevision system detailsImpedence networksElectronic communicationVIT signals
The invention belongs to a five-bit radio-frequency MEMS phase shifter in radio-frequency communication and MEMS technologies, comprising a CPW signal wire, an insulating layer, a grounding wire, an MEMS hole-plate metal beam, an elastic cantilever-type support, a proportional capacitor, a direct current (DC) bias electrode, an insulating layer, 31 MEMS switches consisting of bias leads, 5 DC loaded electrodes, connecting leads and a substrate with an insulating layer. The invention effectively overcomes the defect of phase-shifting malfunction of the MEMS metal beam due to self oscillation by adding the DC bias electrode, adopts the hole-plate metal beam and the elastic cantilever-type support to decrease a voltage to be pulled down by approximate 9V, not only realizes the small step of 11.25, 5-bit phase shifting and 32 phase-shifting states, but also has little reflection loss and high phase-shifting precision up to 3.5 and has the advantages of low insertion loss and pull-down voltage, small step amplitude, high bits, phase-shifting precision and reliability of the phase shifter, simpler machining process, matched use with a modern electronic communication system, and the like.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
Optical connector apparatus
ActiveCN102405430ASimple structureStable connection strengthCouplings bases/casesCoupling light guidesElectrical conductorHot swapping
Disclosed is an optical connector apparatus comprising a connector which is connected to an opto-electrical composite cable including an optical fiber strand and a metal conductor, and an object to be connected. The connector is provided with a ferrule which has a conductor portion on at least a part of the surface thereof. The object to be connected is provided with an electrically conductive connector member to be connected to the ferrule. The ferrule and the cable are connected by a caulking structure. When the ferrule is inserted in the connector member, the connector and the object to be connected are electrically and optically connected to each other. Provided is also an optical connector apparatus which comprises a connector having a plurality of ferrules having different distances between the ends of the ferrules and the conductor portion, so that the time at which the connection of the connector to the object to be connected is established differs, and thus the optical connector apparatus is capable of hot swapping. The object to be connected can be a combination of an adapter and a mating connector, or an optical element and an adapter which holds the same, etc.
Owner:JAPAN AVIATION ELECTRONICS IND LTD
Electromagnetic sliding valve
ActiveCN1952453AReduce noiseReduce vibrationOperating means/releasing devices for valvesMultiple way valvesEngineeringRefrigeration
The invention relates to an electromagnetic sliding valve for frozen and cold storage refrigeration system so as to improve the performance, comprising valve body, valve cavity, one inlet port connected with said valve cavity and two outlet ports set on the flat sealing face of said valve cavity, a stepper motor comprised by stator on the outer shell and rotor in said valve cavity, sliding block for changing the opening-closing status of outlet port, which is driven to move on the said flat sealing face by said rotor. It is characterized in that power is transmitted to said sliding block to move straight so as to change the opening-closing status of outlet by said rotor through rack and pinion mechanism, said sliding block is pretension to said flat sealing face so as to ensure the sealing between sliding block and sealing face by encouragement method. The moving and driving method of sliding block is changed and it is suitable for machining and assembling parts. It is provided with enough designing space for opening design of electromagnetic valve and there is no vibration and noise basically.
Owner:ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
Bonding structure with compliant bumps
InactiveUS20050098901A1Reduce the modulus of elasticityReduce pressurePrinted circuit assemblingSemiconductor/solid-state device detailsBonding processEngineering
The invention provides a bonding structure with compliant bumps, and also includes a stopper structure and a protection layer. Compliant bumps include at least a polymer bump, a metal layer and a surface conductive layer. Both the stopper structure and protection layer are formed with polymer bumps and metal layer. Compliant bumps provide bonding pad and conductive channel. Stoppers are used to prevent compliant bumps from crushing for overpressure in bonding process. The protection layer provides functions of grounding and shielding. The stoppers can be outside or connected with the compliant bumps. The protection layer is lower then the stopper structure and compliant bumps. It can be separated or connected with stoppers.
Owner:IND TECH RES INST
Camera hidden type full-screen mobile phone
ActiveCN108111653AImprove the camera field of viewAdapt to the photo environmentTelephone set constructionsHand operationsMobile phone
The invention discloses a camera hidden type full-screen mobile phone which comprises a machine body; the full-screen mobile phone is characterized in that symmetric sliding grooves are formed in themiddle upper position of the back of the machine body; a groove and a square groove are formed in the middle position above the back part of the machine body; the square groove is communicated with the groove; the inner side of the square groove is fixedly connected with one end of a guide rod; the groove is communicated with the symmetric sliding grooves; sliding blocks are arranged in the symmetric sliding grooves respectively; and one side of the sliding block is fixedly connected with a contact sensor head, a soft spring and a hard spring respectively. According to the mobile phone in theinvention, the height of the camera can be adjusted according to the field of view of photographing and the environment; photographing can be realized on the premise that the mobile phone is not unlocked; stretching of the camera can be realized by one-hand operation; a symmetrical design is quite attractive and user operations are facilitated; due to the design of a dual-linear track, the liftingprocess of the camera is more stable.
Owner:宜章鑫晨光电子有限公司
SAW transducer interface to pressure sensing diaphragm
InactiveCN1619954AFacilitates mechanical alignmentReduce non-linearityInflated body pressure measurementImpedence networksElectricityPressure sense
A sensor arrangement for monitoring a physical parameter in a given environment, such as a tire or wheel arrangement, comprising an improved interface between sensor components. The sensor device includes a piezoelectric substrate on which a resonator element, such as a surface acoustic wave (SAW) resonator, is disposed. The resonators are configured to produce an electrical output within a predetermined range of resonator frequencies that can be monitored to determine information such as pressure and temperature to which the devices are exposed. Protrusions are formed on the surface of the piezoelectric substrate which selectively contact recessed surface areas within the flexible cover housing member. The cover housing component and rigid base assembly combine to form a closed enclosure for the sensor device. An antenna may be incorporated into the sensor device to facilitate receiving and / or transmitting communication signals.
Owner:MICHELIN & CO CIE GEN DES ESTAB MICHELIN +1
Comb condenser type dual-spindle accelerometer
InactiveCN101504426AHigh resolutionIncrease the initial capacitance valueTelevision system detailsSemi-permeable membranesSpeed measurementPhysics
The invention relates to a comb capacitance type dual-axis accelerometer, which comprises a substrate; the substrate is provided with a sensitive mass block; the sensitive mass block is provided with fixing comb teeth respectively; movable comb teeth are also arranged between each periphery and corresponding fixing comb teeth of the sensitive mass block; four corners of the sensitive mass block are also connected with four support frames respectively; and the four support frames are symmetrical with the center of the sensitive mass block, and the other ends of the four support frames are connected to the substrate. The comb capacitance type dual-axis accelerometer has small volume and light weight, and can realize two-dimensional acceleration measurement with high sensitivity and resolution.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Large-area-friction-induced micron-scale processing equipment in multipoint contact mode
ActiveCN102718182ANumber of needle points adjustmentAdjustable sizeDecorative surface effectsChemical vapor deposition coatingElectricityCantilevered beam
The invention relates to large-area-friction-induced micron-scale processing equipment in a multipoint contact mode. The large-area-friction-induced micron-scale processing equipment consists of a base, a processing platform drive device, a loading mechanism and a data acquisition and control system, wherein the processing platform drive device consists of a horizontal two-dimensional electronically-controlled translation stage, a manual three-dimensional displacement stage and an L-shaped sample stage; the loading mechanism is formed in a manner that an electric angular displacement stage is arranged on the upper surface of the base, the fixed end of a force-sensitive cantilever beam is fixed on the horizontal working surface of the electric angular displacement stage, and a probe array is fixed on the lower surface of the end part of the free end of the cantilever beam; a laser displacement sensor is located right above the end part of the free end of the cantilever beam; and the horizontal two-dimensional electronically-controlled translation stage, the electric angular displacement stage and the laser displacement sensor are all electrically connected with the data acquisition and control system. The equipment has the advantages of large processing size, high processing efficiency, accuracy in load control, evenness in load distribution and evenness and consistency for processed structures.
Owner:SOUTHWEST JIAOTONG UNIV
Radio frequency micro-electro-mechanical system (MEMS) switch and fabrication method thereof
ActiveCN105575734AReduce the driving voltageReduce the modulus of elasticityElectrostatic/electro-adhesion relaysEngineeringRadio frequency
The invention discloses a radio frequency micro-electro-mechanical system (MEMS) switch and a fabrication method thereof. The radio frequency MEMS switch is characterized by being of a silicon-silicon dual-layer structure and comprises a substrate, a dielectric layer, a driving electrode, an isolation layer, a signal line, a ground line and a cover cap, wherein the signal line comprises a signal line input electrode, a columnar anchor point, two fixed beams, a cross beam, a multi-contact system and a signal line output electrode, one end of each of the two fixed beams is fixed on the upper surface of the columnar anchor point, the other ends of the two fixed beams are connected with a fixed end of the cross beam, the multi-contact system is arranged below a free end of the cross beam, the driving element is arranged below the cross beam, a groove and through holes are formed in a silicon cap, and the positions of the through holes are in correspondence to the signal line input electrode, the signal line output electrode, the ground line and the driving electrode. With the radio frequency MEMS switch disclosed by the invention, the driving voltage of the switch is effectively reduced, the service lifetime of the contact point is prolonged, the cross beam is protected by the silicon cap so as not to be affected by an environment, and the reliability of the switch is improved.
Owner:BEIJING MXTRONICS CORP +1
MEMS pressure sensor and manufacturing method thereof
ActiveCN105036054AImprove performanceReduce the modulus of elasticityPrecision positioning equipmentDecorative surface effectsMems pressure sensorSignal-to-noise ratio (imaging)
The invention discloses an MEMS pressure sensor and a manufacturing method of the MEMS pressure sensor. A sensitive membrane layer which forms a vacuum chamber with a substrate is arranged above the substrate. The sensitive membrane layer comprises a middle sensitive portion and a supporting portion which is arranged at the edge of the sensitive portion and supported on the substrate, wherein the plane where the sensitive portion is located is lower than the supporting portion and is connected with the supporting portion via an inclining portion so that the sensitive portion, the inclining portion and the supporting portion could form a step-shaped structure. According to the MEMS pressure sensor, the sensitive portion, the inclining portion and the supporting portion in the sensitive membrane layer forms a step-shaped sinking structure, so that the internal stress of the sensitive membrane layer could be completely released in the process of depositing the sensitive membrane layer. Because the elastic coefficient of the sensitive membrane layer is low, relative higher sensitivity could be obtained. In addition, the sensitive portion is connected with the supporting portion via the inclining portion, so the sensibility of the sensitive portion to the change of the stress could be greatly reduced so as to improve signal to noise ratio of a chip and improve the performance of the pressure sensor.
Owner:WEIFANG GOERTEK MICROELECTRONICS CO LTD
Micro-mechanical cantilever beam type pi type continuous reconfigurable microwave band-pass filter
ActiveCN103811834AReduce the modulus of elasticityReduce the driving voltageWaveguide type devicesCapacitanceOut of band rejection
The invention discloses a micro-mechanical cantilever beam type pi type continuous reconfigurable microwave band-pass filter. The micro-mechanical cantilever beam type pi type continuous reconfigurable microwave band-pass filter comprises a planar spiral inductor, two identical MEMS variable planar plate capacitors and two identical MIM capacitors are symmetrically arranged at the left and right sides of the planar spiral inductor in sequence, wherein each MEMS variable planar plate capacitor is connected between a CPW signal wire and a ground wire in parallel while each MIM capacitor is connected with the CPW signal wire in series so as to make up a pi type topological structure with band-pass characteristics. The MEMS variable planar plate capacitors achieve different capacitances based on an electrostatic principle; the upper pole plate of each MEMS variable planar plate capacitor is an MEMS cantilever beam while the lower pole plate thereof is the CPW signal wire, wherein the MEMS cantilever beam stretches across the CPW signal wire, and a drive electrode is arranged near the CPW signal wire; an Si3N4 insulating medium layer covers each of the CPW signal wire under the MEMS cantilever beam and the drive electrode. The filter realizes the continuous tuning for the center frequency and the band width and has advantages of low loss, good out-of-band rejection, wide frequency band tuning and small chip area.
Owner:SOUTHEAST UNIV
Shock absorber with intelligent automatic pre-pressure adjusting function
ActiveCN104879430AReduce the modulus of elasticityMeet comfort requirementsSpringsShock absorbersPressure functionEngineering
The invention relates to a shock absorber with the intelligent automatic pre-pressure adjusting function. The shock absorber comprises a damping rod and a damping spring. A first telescopic portion of the damping rod is provided with a lifting seat and an adjusting gear. The adjusting gear drives the lifting seat to rise and fall to adjust the pre-pressure of the damping spring. An adjusting device comprises a main rack, a gear plate, a gear shifting mechanism and a gear shifting transmission mechanism. The gear shifting transmission mechanism is provided with three gears, namely the forward gear for driving the adjusting gear to fall, the neutral gear not driving the adjusting gear and the reverse gear for driving the adjusting gear to rise. The gear shifting transmission mechanism is located in different gears through gear shifting motion of a gear shifting driving lever, and when a gear shifting switch is located in the upshift position, the gear shifting transmission mechanism is in the reverse gear state; when the gear shifting switch is located in the downshift position, the gear shifting switch drives the gear shifting driving lever to make the gear shifting transmission mechanism located in the forward gear state. The shock absorber has the advantages that the pre-pressure can be automatically adjusted according to loads, and the comfort requirements under different load conditions are met.
Owner:常州舒安智能机器人有限公司
Two-axis accelerometer based on SOI technology
InactiveCN101839923AHigh sensitivityHigh resolutionTelevision system detailsSemi-permeable membranesAccelerometerSilicon
The invention relates to a comb-teeth capacitive type two-axis accelerometer based on an SOI technology, comprising an insulating substrate; the insulating substrate is provided with a sensitive mass block; fixed comb teeth which are fixed on the insulating substrate by an oxidation layer in the middle of an SOI silicon wafer are respectively arranged at the periphery of the sensitive mass block; a movable comb tooth is also arranged between each peripheral edge of the sensitive mass block and the corresponding fixed comb tooth; the four corners of the sensitive mass block are also respectively connected with four supporting frames; and the four supporting frames are distributed at the periphery of the sensitive mass block in a central symmetry way, and the other ends of the four supporting fames are connected to an anchorage zone. The comb-teeth capacitive type two-axis accelerometer has small volume and light weight, and can realize two-dimensional accelerate measurement with high sensitivity and high resolution.
Owner:鲍路路
Thermoset resin composition and multi-layer printed circuit board used thereof
ActiveCN1690119AImprove insulation reliabilityImprove heat resistancePrinted circuit detailsUrnsEpoxyCrack resistance
The present invention provides a thermosetting resin composition which has smaller solidification shrinking and excellent crack resistance and insulation reliability and the like properties, further the invention provides a thermosetting resin composition which has excellent sealing property between the condensate filled in the hole part and the cover coating layer. The thermosetting resin composition provided by the invention is characterized in that the composition comprises the following components: (A) epoxy resin, (B) polyfunctional phenolic compound, (C) solidifying catalyst, (D) filling agent and (E) the thermosetting resin composition of the oxetane compound; the invention also provides a thermosetting resin composition containing the compound which is showed by the general formula (I) and includes the oxazine ring group.
Owner:TAIYO HLDG CO LTD
Self-floating type climbing mechanism
Owner:浙江科钛机器人股份有限公司
Linkage shock absorber device
PendingCN107882913AConsider comfortFlexible switchingSpringsLiquid based dampersHydraulic cylinderShock avoidance
The invention provides a linkage shock absorber device for automobile spring shock absorption. The linkage shock absorber comprises four groups of shock absorber assemblies; the shock absorber assemblies can achieve shock absorption by hydraulic damping; the four groups of shock absorber assemblies comprises a left front shock absorber assembly suitable for a left front wheel, a right rear shock absorber assembly suitable for a right rear wheel, a left rear shock absorber component suitable for a left rear wheel, and a right front shock absorber assembly suitable for a right front wheel; the left front shock absorber assembly communicate with the right rear shock absorber assembly through a oil passage to achieve linkage, so that a corresponding hydraulic cylinder has the same stretching direction; the left rear shock absorber component communicates with the right front shock absorber assembly through the oil passage to achieve linkage, so that the corresponding hydraulic cylinder hasthe same stretching direction. The linkage shock absorber device solves the technical problem that the car body is obviously tilted when the traditional technology car turns in the turning, and the car body can beat obviously when meets the uneven pavement, and the comfort of the car and the anti-roll cannot be taken into account in one time.
Owner:畅建坤
Vibration monitor and earthquake vibration monitoring apparatus
InactiveCN104181582ALower resonance frequencyLow costSeismic signal receiversVibration controlEngineering
The invention discloses an earthquake vibration monitoring apparatus comprising a vibration monitor including a base body, an elastic plate, a vibration sensing portion, and an oscillator installed at the elastic plate. The circumferential edge of the elastic plate is supported on the base body. The base body has a hollow structure and provides a motion space for the elastic plate. When being vibrated, the elastic plate moves along the direction perpendicular to the elastic plate and drives the oscillator to move; and the vibration sensing portion senses the movement of the elastic plate to generate a vibration signal. Compared with the prior art, the apparatus has the following beneficial effects: the elastic plate vibrates along the axial direction; the resonant frequency is low; the elastic coefficient is low; the vibration induction sensitivity is high; the detection sensitivity is high; the structure is simple; and the cost is low. Therefore, the vibration monitor can sense the tiniest vibration by the elastic plate, so that the detection precision is high.
Owner:BEIJING JIAYUE TONGLEJI ELECTRONICS
Driving electrode plate and capacitor upper electrode plate separating type RF MEMS switch
InactiveCN103943421AReduce the modulus of elasticityReduce the driving voltageElectrostatic/electro-adhesion relaysCoplanar waveguideTypes of capacitor
The invention discloses a driving electrode plate and capacitor upper electrode plate separating type RF MEMS switch which comprises a substrate, a buffer dielectric layer, a ground wire, a coplanar waveguide transmission line, an anchor point, an insulating dielectric layer, elastic folding beams and an upper electrode. The ground wire, the coplanar waveguide transmission line and the anchor point are arranged on the buffer dielectric layer, the coplanar waveguide transmission line is covered with the insulating dielectric layer, a gap is reserved between the upper electrode and the insulating dielectric layer, the upper electrode is divided into a capacitor upper electrode plate and driving electrode plates located at the two ends of the capacitor upper electrode plate, the driving electrode plates are connected with the capacitor upper electrode plate through two sets of elastic folding beams in the bent shape of n with the bent number being one, and the driving electrode plates are connected with the anchor point through two sets of elastic folding beams in the bent shape of n with the bent number being two. According to the driving electrode plate and capacitor upper electrode plate separating type RF MEMS switch with the structure, the microbridge elastic coefficient is effectively reduced, so that the driving voltage of the capacitor type RF MEMS switch is reduced, and the driving voltage can be lower than 3 V.
Owner:SUZHOU KUEN ELECTRONICS TECH
Extrusion device for plastic injection molding based on turbid liquid soft and hard state change
InactiveCN111716645AState changes are controllableEasy to deform and shrinkRubber ringElectrical resistance and conductance
The invention relates to an extrusion device for plastic injection molding based on turbid liquid soft and hard state change, and relates to the technical field of plastic injection molding. The device comprises an extrusion cylinder, wherein a push block is movably connected to the inner wall of the right side of the extrusion cylinder, a positive plate is fixedly connected to the inner wall of the top of the push block, a negative plate symmetrical to the positive plate is fixedly connected to the inner wall of the bottom of the push block, and the inner wall of the bottom of the push blockis fixedly connected with a resistor electrically connected with the negative plate. According to the extrusion device for plastic injection molding based on the turbid liquid soft and hard state change, through cooperative use of a dielectric plate and the resistor, the dielectric plate is located at the leftmost end in an initial state, at the moment, a relative area of the positive plate and the negative plate is the largest, a circuit is powered on, a conductive block powers on turbid liquid to be in a solid state, transmission is facilitated, when the dielectric plate is inserted into theinnermost side of the push block, the circuit voltage is reduced to the minimum and is smaller than the minimum path voltage of the resistor, the circuit is disconnected, and deformation and contraction of a rubber ring are facilitated, so that the effect of the controllable turbid liquid state change is achieved.
Owner:黄晓娜
Water supplement and drainage control method for hanging board and sunshade board combined support slope greening structure
ActiveCN110402720AReduce loadReduce in quantityGeneral water supply conservationGrowth substratesWater storageWater storage tank
The invention provides a water supplement and drainage control method for a hanging board and sunshade board combined support slope greening structure. The water supplement and drainage control methodinvolves a hanging board fixed to a slope, the hanging board is anchored to the slope through a plurality of anchor rods, a sunshade board is anchored to the top of the slope, a plurality of groovesare formed in the hanging board, and water storage tanks are installed at the positions of the grooves. A water supplement and drainage pipe penetrates into the hanging board and is communicated withthe water storage tanks, the sunshade board comprises two metal boards with holes, and the two metal boards are arranged on the top layer and the bottom layer respectively; a pressure plate is fixed to the inner side wall of the metal board on the top layer, springs are fixed to the bottom of the inner wall of the pressure plate, the bottoms of the springs are fixedly provided with an opening-closing plate, and the bottom of the opening-closing plate is provided with the metal plate on the bottom layer; soft water drainage pipes are communicated between the pressure plate and the opening-closing plate. The water supplement and drainage control method has the advantages that construction is convenient, fewer damage factors exist, water drainage and supplement can be facilitated, and later maintenance is facilitated and reduced.
Owner:CHINA THREE GORGES UNIV
Piezoelectric ultrasonic transducer and preparation method thereof
ActiveCN107511317AHigh electromechanical coupling coefficientLower resonant frequencyMechanical vibrations separationElectrical resistance and conductanceElectricity
The invention provides a piezoelectric ultrasonic transducer and a preparation method thereof. The piezoelectric ultrasonic transducer comprises a vibrating diaphragm and a piezoelectric diaphragm arranged on the vibrating diaphragm in an attached mode. A resistor structure capable of generating joule heat to enable the local temperature of the vibrating diaphragm to rise under the power-on state is arranged on a marginal area, close to a base, of the vibrating diaphragm. Because the vibrating diaphragm adopts materials of silicon dioxide and the like, wherein the Young modulus of the materials is reduced along with rising of the temperature, the integral elastic coefficient of the vibrating diaphragm can be reduced by heating, the electromechanical coupling factor of the transducer is increased, and sound pressure output is changed; and on the other hand, the resonant frequency when the vibrating diaphragm vibrates is reduced along with reducing of the elastic coefficient, and dynamic adjustment of an ultrasonic wave output frequency is achieved.
Owner:AAC TECH PTE LTD
Centrifugal speed regulator device for preventing pulsation
InactiveCN108591398AEliminate vibrationReduce noiseGear vibration/noise dampingFluid gearingsHydraulic cylinderEngineering
The invention belongs to the technical field of centrifugal speed regulators, and particularly relates to a centrifugal speed regulator device for preventing pulsation. The centrifugal speed regulatordevice for preventing pulsation comprises an input shaft, a disc, fixed blocks, racks, a conical shell and a control rod, wherein the input shaft rotates and drives the disc to rotate; when the rotating speed of the disc is relatively fast, the three fixed blocks move and drive the three corresponding racks to move under the effect of the centrifugal force; the three racks move and drive three corresponding gears to rotate; the three gears rotate and drive an annular gear ring to rotate; three first fixed springs extrude three first hydraulic cylinders; at the moment, the conical shell suffers the acting force of a ball No.1, a ball No.2 and a ball No.3 under the combined action of the first fixed springs and the centrifugal force; and the ball No.1, the ball No.2 and the ball No.3 extrude the conical shell under the action of centrifugal force, and the conical shell moves axially at the moment, so that the conical shell suffers the same pressure force, and further the pulsation phenomenon happening to the centrifugal speed regulator is avoided.
Owner:狄文莉
Safety valve
InactiveCN102758643AReduce the modulus of elasticityFast dynamic responseProps/chocksInlet channelSafety valve
The invention discloses a safety valve. The safety valve comprises a valve body, a valve sleeve, a valve core, a spring seat, a spring, and pressure adjusting screws, wherein the valve body is provided with a valve chamber; the valve sleeve, the valve core, the spring seat, the spring and the pressure adjusting screws are arranged in the valve chamber; the valve body is also provided with a liquid inlet channel, a liquid outlet channel and a valve hole for communicating the liquid inlet channel and the liquid outlet channel; a sliding hole and a pressure chamber positioned at the middle of the sliding hole are arranged at the centre of the valve sleeve; one end of the valve core is provided with a sealing part for blocking the valve hole, and the other end of the valve core is provided with a propping part propped on the spring seat; a sliding part sliding in the sliding hole of the valve sleeve is arranged at the middle end of the valve core; a blind hole and a liquid guide hole are arranged on the valve core, wherein the opening of the valve core is positioned at the centre of the sealing part, and the liquid guide hole is used for communicating the blind hole and a pressure chamber in the valve sleeve; and one end of the spring is propped on the spring seat, and the other end of the spring is propped on the adjusting screw. Compared with the traditional product, the safety valve can effectively reduce the elasticity coefficient of a returning spring on the premise that the same flow is achieved, thus achieving the technical effect under relatively fast dynamic response.
Owner:乐清市东风煤矿设备有限公司
Parallel capacitor switch
ActiveCN110853985AReduce the modulus of elasticityReduce the driving voltageElectrostatic/electro-adhesion relaysWaveguide type devicesCapacitanceTransmission line
The embodiment of the invention discloses a parallel capacitor switch, which comprises two anchor zones, an RF MEMS switch beam, a dielectric layer and a signal transmission line. The RF MEMS switch beam includes a plurality of snakelike structured springs and intermediate beams. The two anchor zones are respectively fixed on both sides of the RF MEMS switch beam. The dielectric lay is located between the RF MEMS switch beam and the signal transmission line. The elasticity coefficient of the multiple snakelike structured springs is less than a preset elasticity coefficient threshold. One end of the snakelike structured springs is connected with the anchor zones, and the other end of the snakelike structured springs is connected with the intermediate beams. When a driving voltage accesses to the RF MEMS switch beam, the intermediate beams move downward to drive multiple snakelike structured springs to twist until the intermediate beams and the multiple snakelike structured springs comeinto contact with the dielectric layer, so that signals transmitted by a signal transmission line are coupled to the ground wire.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Autoclaved aerated concrete block blank steam-curing device
ActiveCN106584663AEasy clampingEasy to operateAuxillary shaping apparatusStructural engineeringEngineering
The invention belongs to the technical field of production of autoclaved aerated concrete blocks, and in particular, relates to an autoclaved aerated concrete block blank steam-curing device. The autoclaved aerated concrete block blank steam-curing device comprises a frame and stand columns; the stand columns are fixedly mounted on the frame; a cross beam bracket is fixedly mounted at the upper ends of the stand columns; a pressing plate is arranged under the cross beam bracket; a cylinder is fixedly mounted on the pressing plate, and is movably connected to the cross beam bracket; a cutter is vertically connected between the cross beam bracket and the frame; an autoclaved aerated concrete block blank is placed below the pressing plate; a baffle plate and a spring are arranged on one side, far from the cutter, of the autoclaved aerated concrete block blank; two ends of the spring are fixedly connected with rubber cushion blocks; a rubber band is arranged between the two ends of the spring, and is fixedly connected to the rubber cushion blocks; the rubber band compresses the spring; the spring abuts against one side, near the autoclaved aerated concrete block blank, of the baffle plate; a coil is wound at the upper end of the cutter; and the cutter is connected with a power supply. The autoclaved aerated concrete block blank steam-curing device solves the problem of difficult drying of the interior of the autoclaved aerated concrete block blank due to difficult introduction of steam into a gap of the autoclaved aerated concrete block blank.
Owner:重庆市泰日建材有限公司
Capacitive RF MEMS switch
InactiveCN103943417AReduce the modulus of elasticityReduce the driving voltageElectrostatic/electro-adhesion relaysCoplanar waveguideEngineering
A capacitive RF MEMS switch comprises a substrate, a buffer dielectric layer on the substrate, grounding leads, a coplanar waveguide transmission line, anchor points, an insulation dielectric layer, elastic folded beams and an upper electrode. The grounding leads, the coplanar waveguide transmission line and the anchor points are arranged on the buffer dielectric layer, the coplanar waveguide transmission line is covered with the insulation dielectric layer, one ends of the elastic folded beams are connected with the anchor points, the other ends of the elastic folded beams are connected with the upper electrode, a clearance is reserved between the upper electrode and the insulation dielectric layer, the elastic folded beams are bent to be in an n shape, the bending number is two, and the set number is two. The upper electrode comprises a drive electrode plate and a capacitive upper electrode plate, and the drive electrode plate and the capacitive upper electrode plate are connected through dual straight beams. The supporting structure of the upper electrode plate is optimized, the elastic coefficient of a microbridge is effectively lowered, and the drive voltage of the capacitive RF MEMS switch is lowered. Experiments show that the drive voltage can be lower than 3 V.
Owner:SUZHOU KUEN ELECTRONICS TECH
Shock absorber of rotary encoder
InactiveCN101726327AEliminate eccentric vibrationReduce the modulus of elasticityMeasurement apparatus componentsMotor shaftRotary encoder
The invention relates to a shock absorber of a rotary encoder, which comprises straight sections and bending sections, and is characterized in that at least two bending sections are arranged between two straight sections, can move upwards, downwards, forwards, backwards, leftwards and rightwards and can borrow deviations from a plurality of directions. The middle parts of the straight section are provided with arch sections which are provided with holes and play roles of screw troughs. The shock absorber can eliminate multi-directional eccentric vibrations generated between a shaft of the rotary encoder and a motor shaft, can borrow the deviations from a plurality of directions and reduce elasticity coefficients, and has the advantages of simple structure and low cost.
Owner:SHANGHAI HENGXIANG OPTICAL ELECTRONICS
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