26 results about "Bimorph" patented technology

The technology described herein is directed towards a metasurface arranged with unit cells for narrowband sound absorption, in which the unit cells are based on Helmholtz resonators that can have their resonant frequencies adjusted via MEMS actuators. A sound absorbing unit-cell is designed and constructed based on a general resonance frequency, and includes a neck portion and air chamber dimensioned to resonate close to the desired resonance frequency and thereby inverse phase cancel corresponding narrowband frequencies of incoming sound waves. A bimorph MEMS actuator and / or moveable part in the resonators, controlled by a controller, facilitates changing of the airflow the unit cells to adjust the resonant frequencies thereof, to cancel acoustic waves of different frequencies corresponding to noise, which can change over time. The unit cells can be distributed as part of a metasurface, which can be positioned proximate to a noise source to phase cancel the noise.

A piezoelectric jacquard device for a warp knitting machine comprises a novel base, a novel bimorph, a plug assembly, a shield assembly, a cable bundle assembly, a pouring sealant, a grounding screw, a novel guide needle assembly, a stainless steel front blocking tooth assembly, a rotating shaft, a rotating shaft cover plate, a cover plate fixing screw and a front blocking tooth fixing screw. Wherein the novel yarn guide needle assembly comprises a plastic clamping sleeve and a novel yarn guide needle, and the stainless steel front blocking tooth assembly comprises stainless steel upper blocking teeth and stainless steel lower blocking teeth. One end of the novel bimorph is limited and fixed in a rear blocking tooth of the novel base, and the other end of the novel bimorph is limited in a bimorph swing limiting groove in the novel yarn guide needle assembly to form flexible hinge connection; the novel yarn guide needle assembly is matched and positioned with the rotating shaft through a rotating shaft positioning hole in the novel yarn guide needle assembly; a novel yarn guide needle of the novel yarn guide needle assembly is limited up and down and left and right in a yarn guide needle limiting groove in the stainless steel front blocking tooth assembly.

The utility model provides a double-form tobacco pipe which comprises a tobacco pipe body, a tobacco burning bin is arranged at the top of the tobacco pipe body, a detachable bottom cover is arranged on the bottom face of the tobacco pipe body, an annular threaded connecting part is arranged at the bottom of the tobacco pipe body, and the detachable bottom cover is installed on the annular threaded connecting part in a threaded fit mode. The suction nozzle is communicated with the tobacco combustion bin, and the suction nozzle is used for sucking smoke; the conversion kit comprises a threaded bottom cover, a water pipe and a sealing ring, the threaded bottom cover is matched with the annular threaded connecting part at the bottom of the tobacco pipe body, an annular connector is further arranged on the inner side of the threaded bottom cover, the water pipe is detachably connected to the annular connector, an annular mounting groove is formed in the inner side of the threaded bottom cover, and the sealing ring is embedded in the annular mounting groove; the water pipe is arranged on the periphery of the water pipe. The dual-form tobacco pipe can be freely switched between a common tobacco pipe form and a hookah form, different requirements of users are met, and convenience and scene adaptability of products are effectively improved.

The application discloses a temperature compensation type resonator based on polarity inversion double piezoelectric layers, a filter and a multiplexer, and belongs to the technical field of bulk acoustic wave resonators, and comprises a bottom electrode, a top electrode and a composite piezoelectric stack structure arranged between the bottom electrode and the top electrode, wherein the composite piezoelectric stack structure comprises two piezoelectric layers and a temperature compensation layer arranged between the two piezoelectric layers; the crystal polarity directions of the two piezoelectric layers are opposite, and the thicknesses are arranged according to a preset ratio, so that the temperature compensation layer is located in a vibration displacement minimum value region of the composite piezoelectric stack structure in a resonant state. The temperature compensation type resonator aims to solve the problem that the existing bulk acoustic wave resonator is difficult to balance between temperature stability and electrical performance, and lacks optimal design of polarity configuration of the piezoelectric layer, and cannot fully utilize the performance potential of the piezoelectric material, thereby limiting the performance improvement of the temperature compensation type resonator, and achieves the balance between temperature stability and electrical performance, and realizes the unity of high performance and high stability.

A method of making a bimorph assembly by stacking a perforated outer bottom metal layer, a transductive element, a perforated central metal layer, a second transductive element, and a perforated outer top metal layer to form a laminar structure, the metal layers and transductive elements being separated by thin conductive ink layers. Applying uniform and continuous pressure to the bottom and top surfaces of the laminar structure. Thermal cycling the laminar structure according to a thermal profile that causes suffusion of the thin conductive ink layers into the metal perforations and the transductive element surface. Removing the pressure from the bottom and top surfaces of the laminar structure and applying an electric field to the central metal layer, the outer top metal layer, and the outer bottom metal layer.

The application relates to the technical field of flexoelectric fan, and discloses a micro dual-element flexoelectric fan and a use method, a shell of the device comprises an upper air outlet cover and a lower air inlet plate, the two are coveringly arranged, and are respectively provided with an air outlet and an air inlet; a clamping unit is arranged between the upper air outlet cover and the lower air inlet plate, two groups of ceramic fan elements are clamped between the two through the clamping unit, and upper and lower air chambers are formed. A first wire is electrically connected with the upper surfaces of the ceramic fan elements through the clamping unit of the upper air outlet cover, a second wire is electrically connected with the lower surfaces of the ceramic fan elements through the clamping unit of the lower air inlet plate, and the other ends of the wires are electrically connected with the outside. The application realizes bending vibration air supply by applying a sinusoidal alternating voltage to the two groups of ceramic fan elements, breaks away from the material and temperature limitations of a traditional piezoelectric fan, and can stably work in a high-temperature environment.

The invention discloses an AlMgScZr alloy reinforced based on a column-equal dual-state grain precipitated phase and a reinforcement method and a yield strength calculation method thereof, and belongs to the technical field of metal material reinforcement. According to the method, pulse current is adopted to treat the printed AlMgScZr alloy, and the specific parameters are as follows: square waveform, current density of 45-75 A / mm < 2 >, duty ratio of 10%, pulse interval of 1 ms, frequency of 100 Hz and treatment time of 180 s. According to the method, strengthening is achieved by inducing rapid precipitation of multiple precipitated phases in columnar crystal and isometric crystal areas in the alloy. On the basis of characterization statistics of the precipitated phases, strength contributions provided by the precipitated phases in a columnar crystal region, an equiaxed crystal region and each region are calculated respectively, and the obtained theoretical yield strength value is well matched with an experimental value. According to the method, the strength of the AlMgScZr aluminum alloy can be remarkably improved within a short time, and the method is suitable for research and application of microstructure regulation and mechanical property optimization of the additive manufacturing aluminum alloy.

SMA actuators and related methods are described. One embodiment of an actuator includes a base; a plurality of buckle arms; and at least a first shape memory alloy wire coupled with a pair of buckle arms of the plurality of buckle arms. Another embodiment of an actuator includes a base and at least one bimorph actuator including a shape memory alloy material. The bimorph actuator attached to the base.

The invention discloses a piezoelectric electromagnetic bimorph sensing structure and a simulation analysis method thereof, and relates to the technical field of sensor design and simulation. The structure comprises a PZT5H piezoelectric layer, an AFC260 alloy elastic blade layer and a PZT5H piezoelectric layer which are stacked in sequence, terminal-ground-terminal parallel excitation is adopted to induce bending vibration, and the resonant frequency can be accurately tuned within the range of 2327 kHz through additional mass. The structure can be further compounded or coupled with a FeGa magnetostrictive layer to form a magnetoelectric sensing unit for non-contact current measurement. According to the matched simulation method, accurate prediction and optimization of resonant frequency, vibration amplitude and stress distribution are realized through parametric modeling, grid encryption, electromechanical / magnetoelectric multi-physics field coupling analysis and stress evaluation. The device is high in integration level and flexible in tuning, remarkably shortens the development period through simulation driving design, improves the reliability, and is suitable for the field of power monitoring and micro sensing.

The invention belongs to the technical field of micro electro mechanical systems (MEMS), and particularly provides a low-loss planar vibration double-tuning-fork resonator based on an AlN-on-Si structure. The double-tuning-fork resonator provided by the invention comprises resonant beams, coupling beams, anchor points, piezoelectric layers, metal layers and insulating layers, the two resonant beams are connected through the double-end coupling beams, and then double-end fixing constraint is carried out through the anchor points on the two sides; the piezoelectric layer and the metal layer on the surface of the resonant beam form an active area, and the active areas are arranged on the upper surface and the lower surface of the resonant beam at the same time and used for exciting an in-plane mode of the double-tuning-fork resonator, limiting out-of-plane displacement, reducing energy dissipation between an anchor point and the outside, achieving low loss and a high Q value, and improving the performance of the double-tuning-fork resonator. The complicated snakelike electrode design in the prior art is also avoided; furthermore, a clamping coupling beam structure is introduced between the two resonant beams, the displacement of the resonator is further limited in a plane, meanwhile, the area and the displacement of an active region are increased, and the signal strength is improved.

The invention discloses a three-dimensional whisker network reinforced mesoporous composite anti-condensation insulating material and a preparation method thereof, and belongs to the technical field of insulating materials, the material is composed of 18%-22% of a three-dimensional whisker network reinforced phase, 70%-76% of a silicon oxide-aluminum oxide composite mesoporous matrix, 3%-5% of an anti-condensation functional component and 0.5%-1.5% of an interface coupling agent KH550, the mesoporous matrix is in bimodal pore size distribution, and the anti-condensation component is a composite system of fluorosilane and double nanoparticles. According to the preparation method, material performance optimization is achieved through the synergistic steps of in-situ whisker network construction, sol-gel compounding, ALD transition layer deposition, radiation crosslinking, plasma modification and the like. The dielectric strength of the obtained material is larger than or equal to 27 kV / mm, the compression strength is larger than or equal to 4.2 MPa, the 72-hour condensation inhibition rate in the 95% RH environment is larger than or equal to 96%, the high-humidity 3000-hour dielectric attenuation rate is smaller than or equal to 4%, and the material can tolerate the salt mist extreme environment, is suitable for long-acting insulation protection of electrical equipment in the high-humidity and strong-corrosion scenes such as ocean platforms and chemical industrial parks and has remarkable industrial application value.

The present embodiments relate to a shape memory alloy (SMA) actuator with a reduced number of materials for manufacturing the actuator. In some instances, elements of the SMA actuator can comprise a dielectric material disposed on the actuator via an injection molding process. In other instances, the SMA actuator can dispose SMA wires above a base of the SMA actuator without the use of any dielectric material. In a first example, an SMA actuator can include a carriage and a base. The base can include a fixed end fixed to the carriage, a free end, a beam connecting the fixed end and the free end, and at least one SMA wire. The SMA actuator can also include an insulator comprising a dielectric material electrically isolating a set of electrical contacts at the fixed end.

This invention discloses a dual-piezoelectric tube driven inertial motor and its control method, along with a scanning probe microscope, relating to the field of piezoelectric tube technology. The invention includes a base, a first piezoelectric tube, a second piezoelectric tube, and a U-shaped sliding body. The first and second piezoelectric tubes are parallel to each other along their axes, with one end fixed to the base and the other end free. The two parallel arms of the U-shaped sliding body, referred to as the left and right sliding rods, are elastically connected via a junction at the bottom of the U-shaped sliding body. The left and right sliding rods are coaxially inserted into the inner walls of the first and second piezoelectric tubes, respectively. This invention not only ensures that the two sliding rods consistently and stably abut against the inner cavities of their respective piezoelectric tubes, guaranteeing effective transmission of driving force, but also improves the overall mechanism's motion accuracy, load-bearing capacity, and anti-interference capability through the coordinated and alternating operation of the dual-drive piezoelectric tubes, laying a structural foundation for achieving high-precision and high-stability stepping motion.

The invention, which relates to the technical field of the actuator, discloses a cooperative comprehensive dynamic modeling method for double piezoelectric actuating mechanisms, comprising the following steps: establishing a kinematics relationship between the actuator and an operation object; establishing a dynamic relationship between the actuator and the operation object; establishing a hysteresis model of a single piezoelectric actuator; establishing a dynamical model of a single piezoelectric actuator and an operation object; based on the two piezoelectric actuators and the operation object, a comprehensive dynamic model is integrated and established. A comprehensive dynamic model between two actuators and an operation object is established through a position coupling relation and a cooperative working mode, the two piezoelectric actuators and the operation object are regarded as a complete kinematics closed-chain system, and then one controller can be used for controlling the two actuators at the same time; and the change of environments and tasks can be flexibly and quickly responded.

The invention relates to the technical field of precision machining, in particular to a dynamic rotary cutter turning system driven by double piezoelectric ceramics. Comprising a machine tool shaft B and a double-piezoelectric-ceramic driving fast tool device. The device is directly fixed at the rotating end part of a shaft B and comprises a sharp knife U shaft and a sharp knife V shaft which are respectively arranged along the radial direction and the cutting depth direction of a workpiece and are driven by piezoelectric ceramics. A spiral cutter path is formed through linkage of B-axis rotation and U-axis and V-axis micro-displacement of the fast cutter and used for machining the free-form surface micro-lens array. Compared with a traditional scheme, the system has the advantages that the motion mass is concentrated on the cutter side, the structure is compact, the mass is light, the rotation center and the mass center are highly overlapped, the dynamic balance characteristic is improved, the vibration problem of a large-mass part on the workpiece side during high-speed rotation is avoided, and the machining precision and stability are improved.

A dual bimorph assembly includes a multilaminar element structure where each elements includes a perforated metal layer, a suffusing conductive ink layer and a transductive assembly. A retainer assembly is provided with conductive tabs and a retainer through connector electrically connects metal layers.

The present embodiments relate to a shape memory alloy (SMA) actuator with a reduced number of materials for manufacturing the actuator. In some instances, elements of the SMA actuator can comprise a dielectric material disposed on the actuator via an injection molding process. In other instances, the SMA actuator can dispose SMA wires above a base of the SMA actuator without the use of any dielectric material. In a first example, an SMA actuator can include a carriage and a base. The base can include a fixed end fixed to the carriage, a free end, a beam connecting the fixed end and the free end, and at least one SMA wire. The SMA actuator can also include an insulator comprising a dielectric material electrically isolating a set of electrical contacts at the fixed end.

A Shape Memory Alloy (SMA) actuator comprises a beam 612 with fixed 620 and free 608 ends, and an SMA wire 610 connected between the ends so that it bends the beam 612 when the SMA 610 contracts due t

This embodiment relates to a shape memory alloy (SMA) actuator with a reduced number of materials required to manufacture the actuator. In some cases, the elements of the SMA actuator include a dielectric material that is placed on the actuator through an injection molding process. In other cases, the SMA actuator may have SMA wires placed above the base of the SMA actuator without using any dielectric material. In the first example, the SMA actuator may include a carriage and a base. The base may include a fixed end fixed to the carriage, a free end, a beam connecting the fixed and free ends, and at least one SMA wire. The SMA actuator may also include an insulator containing a dielectric material that electrically insulates a first set of electrical contacts at the fixed end.

The present embodiments relate to a shape memory alloy (SMA) actuator with a reduced number of materials for manufacturing the actuator. In some instances, elements of the SMA actuator can comprise a dielectric material disposed on the actuator via an injection molding process. In other instances, the SMA actuator can dispose SMA wires above a base of the SMA actuator without the use of any dielectric material. In a first example, an SMA actuator can include a carriage and a base. The base can include a fixed end fixed to the carriage, a free end, a beam connecting the fixed end and the free end, and at least one SMA wire. The SMA actuator can also include an insulator comprising a dielectric material electrically isolating a set of electrical contacts at the fixed end.

This application discloses a dual piezoelectric diaphragm MEMS ultrasonic transducer and its fabrication method. The transducer includes a first substrate and one or more electrode structures located on the first substrate. Each of the one or more electrode structures includes: a first electrode structure, which includes a first bottom electrode, a first piezoelectric film, and a first top electrode stacked sequentially, with the first bottom electrode located on the substrate; and a second electrode structure, which includes a second bottom electrode, a second piezoelectric film, and a second top electrode stacked sequentially; wherein the second top electrode and the first top electrode are bonded together, and the stress distribution of the first piezoelectric film and the second piezoelectric film is symmetrical about the bonding surface of the second top electrode and the first top electrode.

The application discloses a kind of double crystal phase microcrystalline glass materials and preparation method and application, belong to luminescent material technical field.The double crystal phase microcrystalline glass material includes Ca2Al2SiO7:Eu 2+ And CaAl2Si2O8:Eu 2+ Double crystal phase;The glass matrix of the double crystal phase microcrystalline glass material includes the following components: SiO2, Al2O3, CaO, Eu2O3.The double crystal phase in the double crystal phase microcrystalline glass material of the application is activated ion Eu 2+ Multiple doping sites are provided, so that the photoluminescence color and long afterglow light color can be realized from blue light to wide yellow light adjustable tuning;The thermal release peak of the double crystal phase microcrystalline glass material is wide and extends to high temperature 650K, and the defect energy level of the surface is very deep and the defect energy level energy storage performance is good.The double crystal phase microcrystalline glass material of the application provides technical support for high temperature scene warning sign and night vision lighting field.

The invention belongs to the technical field of scanning probe microscopes, and particularly relates to a double-piezoelectric tube imaging scanning probe microscope and a scanning imaging method thereof. The microscope comprises a microscope body, the microscope body comprises an outer frame, an imaging module and a driving module, the driving module comprises a second tubular piezoelectric body and a first tubular piezoelectric body which are nested inside and outside, and the fixed ends of the first tubular piezoelectric body and the second tubular piezoelectric body are fixedly arranged on the outer frame; the imaging module comprises a sample frame and a scanning unit which are oppositely arranged, the sample frame is fixedly arranged at the free end of the first tubular piezoelectric body, and the scanning unit is fixedly arranged at the free end of the second tubular piezoelectric body; and under the driving of the free end of the first tubular piezoelectric body and / or the free end of the second tubular piezoelectric body, the scanning unit performs needle insertion or needle withdrawal or scanning imaging relative to the sample holder. The maximum adjusting distance between the needle tip and the sample can be increased within the limited volume of the endoscope body, and the scanning imaging area can be efficiently replaced.

Shape memory alloy (SMA) systems suffer from system complexity, resulting in bulky systems that require a large footprint and significant height clearance. Furthermore, current systems have not been able to achieve a high Z-stroke range with a compact, low-profile footprint. [Solution] SMA actuators and related methods are described. One embodiment of the actuator includes a base, a plurality of bending arms, and at least a first shape memory alloy wire connected to a pair of the plurality of bending arms. Another embodiment of the actuator includes a base and at least one bimorph actuator comprising a shape memory alloy material. The bimorph actuator is mounted on the base.

SMA actuators and related methods are described. One embodiment of an actuator includes a base; a plurality of buckle arms; and at least a first shape memory alloy wire coupled with a pair of buckle arms of the plurality of buckle arms. Another embodiment of an actuator includes a base and at least one bimorph actuator including a shape memory alloy material. The bimorph actuator attached to the base.

The utility model relates to a piezoelectric jacquard device for a warp knitting machine, which comprises a novel base, a novel needle selection sheet, a plug assembly, a shield assembly, a cable bundle assembly, a pouring sealant, a grounding screw and a rotating shaft, the yarn guide needle assembly comprises an elastic clamping piece, a reinforcing iron piece, a yarn guide needle clamping piece and a novel yarn guide needle, and is characterized in that one end of a novel bimorph is elastically and flexibly connected with the yarn guide needle assembly through elastic glue to form a novel needle selection piece, and the other end of the novel bimorph is fixedly installed in a rear tooth of a novel base; when the novel bimorph swings leftwards in a power-on state, the elastic clamping piece connected with the elastic rubber is driven to move leftwards, then the yarn guide needle assembly is driven to rotate around the rotating shaft, and the front end of the novel yarn guide needle moves rightwards between the front teeth of the novel base. When the novel bimorph swings rightwards in a power-on state, the elastic clamping piece connected with the elastic rubber is driven to move rightwards, then the yarn guide needle assembly is driven to rotate around the rotating shaft, and then the front end of the novel yarn guide needle moves leftwards between the front teeth of the novel base. A rotating shaft rotating hole in the yarn guide needle assembly is a rectangular hole. The rotating shaft is assembled in the rotating shaft through hole of the novel base in an over-hard fit mode.