50 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 invention belongs to the technical field of photoetching micromachining, and relates to an overlay alignment method and device for a transparent bicrystal substrate sample covered by a film. According to the invention, transmission light is utilized to realize bimorph crystal boundary imaging in the bimorph substrate; a reflection imaging system of the photoetching machine with a microscope realizes photoetching layout imaging on the surface of the sample; by accurately adjusting the position of the focal plane, under the condition of transmission / reflection dual-mode cooperative imaging, the photoetching layout and the bicrystal boundary line are clearly visible, so that the accurate alignment of the photoetching layout and the bicrystal boundary line is realized. The method does not depend on alignment of overlay marks, the overlay process is simplified, and the overlay freedom degree is improved. According to the overlay alignment device disclosed by the invention, a transmission light source is transferred out of a photoetching system through the reflective prism, so that the problem that the light source is not uniform due to a narrow space between the overlay mask and the objective table is solved, the problems of a strong light source and heat dissipation of the strong light source are thoroughly solved, and the penetrating power of transmission light is greatly improved.

The invention belongs to the technical field of nondestructive testing, and relates to a high-sensitivity ultrasonic testing method for an oversized metal billet based on multi-probe combination. According to the method, the bimorph longitudinal wave normal probes and the single-wafer longitudinal wave normal probes with different parameters are jointly used, and reasonable selection of detection partitions, detection surfaces and sensitivity adjustment modes is combined, so that high-sensitivity detection of the oversized metal billets with the thickness of 500-1000mm is realized, and meanwhile, relatively high near-surface resolution is ensured. According to the invention, the background noise of the material is reduced, the detection signal-to-noise ratio is improved, effective detection of the metal billet with the maximum thickness of 1m can be realized, the detection sensitivity can reach the equivalent weight of a flat-bottomed hole with the diameter of 1.2 mm, meanwhile, the near-surface resolution is superior to 2-5mm, a large number of reference blocks are not required to be manufactured, the cost is reduced, and field operation is facilitated. According to the method, the problem that ultrasonic detection of the oversized metal billets cannot be detected or the detection sensitivity is low at present can be solved, and an effective means is provided for controlling the internal quality of raw materials for large metal parts.

A piezoelectric microelectromechanical systems device can include a cavity bounded by walls and an asymmetrical bimorph structure at least partially spanning the cavity that includes at least a piezoelectric layer and two electrode layers. The electrode layers can have relative thicknesses configured to compensate for expected temperature stress in the bimorph structure. Thus, metals having different thicknesses can be positioned and configured to compensate deflection due to thermal stress of any or all of the piezoelectric layer, the first metal layer, and second metal layer and a substrate. A method for making the piezoelectric microelectromechanical systems device is also provided.

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 gravimetric solid-state dosing feeder system, configured for use in the movement of granular solids in an efficient manner while limiting jams and / or clogs in the feeder. The system employs bimorph benders in operation. The system provides rate and dosing accuracy to the limit of an individual pulse of material from the Pre-Feeder or depending on the feeder required flow rate, in the order of micrograms. The system is solid state in the sense that there are no bearings, gears, linkages, material shear plates and other moving parts. As such, it has the advantages of piezoelectric drives.

The present embodiments relate to a shape memory alloy (SMA) actuator with a joint between an SMA wire the SMA actuator being disposed at a bottom surface of the SMA actuator. The SMA actuator can include at least one fixed end configured to be fixed to a carriage, at least one free end, at least one beam connecting the fixed end and the free end, and at least one SMA wire. The at least one SMA wire can be electrically connected to the at least one fixed end and the at least one free end via electrical contact portions. The position of the at least one SMA wire being affixed to the bottom surface can allow for reduced stress and a wire exit angle at the weld joint between each SMA wire and the actuator, improving resiliency of the SMA actuator.

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.

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 provides an ultrahigh-strength high-temperature alpha + beta titanium alloy and a preparation method thereof, and belongs to the field of ultrahigh-strength high-temperature titanium alloys, the ultrahigh-strength high-temperature alpha + beta titanium alloy comprises but is not limited to Ti, Al, V, Mo, Nb, Zr, Si and other elements, and comprises the following alloy components in percentage by mass: 6.0-7.0% of Al, 1.0-2.0% of V, 1.2-2.0% of Mo, 0.5-1.5% of Nb, 10.0-12.0% of Zr, 0.15-0.35% of Si, less than or equal to 0.02% of Mn, less than or equal to 0.02% of C, less than or equal to 0.01% of Ni, less than or equal to 0.20% of Sn, less than or equal to 0.04% of Cr, less than or equal to 0.02% of O, less than or equal to 0.01% of P, less 87.8 wt.% < = Ti + 0.9 Zr < = 90.3 wt.%, 6.2 wt.% < = Al + Si < = 7.2 wt.%, 3.5 wt.% < = Mo + Nb + 1.9 V < = 6.5 wt.%, and Ti, Al and Mo are main elements. Through alloy design, the alloy has a specific structure morphology which is a double-state structure, the alloy is composed of a primary alpha phase and a transformation beta phase, round or oval silicide is separated out in the structure, and no harmful phase is generated after aging at 550 DEG C; and meanwhile, the alloy has good mechanical property and excellent processing deformation capacity, and is a novel ultrahigh-strength high-temperature double-phase titanium alloy.

Force measuring device on a complex surface The present description relates to a conformable force measuring device, intended to be subjected simultaneously to compressive forces and bending forces, the device comprising sensors (11, 12) arranged on either side of a substrate (100), the sensors comprising an organic piezoelectric layer (120) arranged between a first electrode (110) and a second electrode (130), the sensors (11, 12) being arranged opposite one another, so as to form a bimorph (10), the sensors being connected to electrically conductive tracks (200) intended to be connected to measuring devices, the organic piezoelectric layers (120) of the sensors (11, 12) being polarized and the sensors (11, 12) being intended to be electrically connected to the measuring devices so as to cancel either the compressive forces or the bending forces. Figure for abstract: Fig. 6

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.

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.

A transducer comprises two piezoelectric layers attached to a substrate, two protective layers, two masses, and two stiffeners arranged at the ends of the bimorph. The transducer is made using a composite bagging process and autoclave curing. The transducer is attached to a flat panel using a parallelogram-shaped double-sided tape to form a loudspeaker or a display panel with haptic feedback. The improved transducer enables a full-range flat panel speaker with uniform frequency response over its operating frequency.

The present invention discloses a bimorph linear motor with triple friction self-matching, which includes a first piezoelectric body, a second piezoelectric body, and a moving rod. The first piezoelectric body and the second piezoelectric body are fixedly connected, and support frames are connected to both the first piezoelectric body and the second piezoelectric body. Friction support portions for supporting the moving rod are provided on the support frames, the first piezoelectric body, and the second piezoelectric body; the friction support portion includes a friction portion connected to the first piezoelectric body and / or the second piezoelectric body, and a first protrusion and a second protrusion located on the support frame. In the operation of the linear motor of the present application, the frictions acting on three positions of the moving rod are self-equal and matched. The double piezoelectric rods formed by the bimorph drive the moving rod to perform linear stepping. The structure is easy to assemble, can maintain operation under ideal conditions, and has a low starting voltage; due to the triple friction self-matching during operation, in an application environment where mechanical structure deformation is caused by factors such as temperature change, the motor still maintains a matching state during the temperature change process, thus being applicable to this extreme environment.

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 is attached to the base.

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.

The present description relates to a conformable force-measuring device, intended to be subjected simultaneously to compressive forces and bending forces, the device comprising sensors (11, 12) arranged on either side of a substrate (100), the sensors comprising an organic piezoelectric layer (120) arranged between a first electrode (110) and a second electrode (130), the sensors (11, 12) being arranged opposite each other, so as to form a bimorph (10), the sensors being connected to electrically conductive tracks (200) intended to be connected to measuring apparatuses, the organic piezoelectric layers (120) of the sensors (11, 12) being polarised and the sensors (11, 12) being intended to be electrically connected to the measuring apparatuses so as to cancel out either the compressive forces or the bending forces.

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 invention relates to the technical field of spinning processing, and particularly discloses a variable-rigidity micromirror and a scanning density modulation method.The variable-rigidity micromirror comprises a micromirror body, the micromirror body is composed of a micromirror plate body, a first shaft rod, a second shaft rod and an assembling component, the first shaft rod is fixedly connected to the interior of the micromirror plate body, and the second shaft rod is fixedly connected to the interior of the assembling component; one end of the first shaft rod is fixedly connected with one end of the assembling component, an aluminum layer material and a silicon dioxide layer material are selected as two materials of the Bimorph structure, and MEMS micromirror characteristic frequencies under different voltages can be obtained by changing the voltages at the two ends of a lead layer electrode to change the rigidity of a cantilever beam, so that the micromirror generates different deflection angles. Through the characteristic that shape memory layers such as resin and liquid crystal elastomers can deform after being heated, the memory material structure deforms and the rigidity of the cantilever beam is changed through the heat effect brought by pressurization, the scanning frequency can be controlled, and the problem that the scanning density cannot be modulated in the prior art is solved.