Abstract: Piezoelectric composites are described. A piezoelectric composite can include a polymeric matrix, piezoelectric additive(s), and polyol. Methods of making and using the piezoelectric composite are also described.

Abstract: An RF filter system includes a plurality of bulk acoustic wave resonators arranged in a circuit having serial and parallel shunt configurations of resonators. Each resonator having a reflector, a support member including a surface, a first electrode including tungsten, overlying the reflector, a piezoelectric film including crystalline aluminum scandium nitride overlapping the first electrode, a second electrode including tungsten overlapping the piezoelectric film and the first electrode, and a passivation layer including silicon nitride overlying the second electrode. Portions of the support member surface of at least one resonator define a cavity region having a portion of the first electrode of the at least one resonator is located within the cavity region. The pass band circuit response has a bandwidth corresponding to a thickness of at least one of the first electrode, piezoelectric film, second electrode, and passivation layer. The system can include single crystal or polycrystalline BAW resonators.

Abstract: A vibrator device includes a package including a base that is a semiconductor substrate and a lid that is a semiconductor substrate and has a housing section, a vibrator element and a passive element housed in the housing section and placed at the base, an oscillation circuit placed at the base and electrically coupled to the vibrator element, and a circuit that is placed at the base or the lid, is electrically coupled to the passive element, and operates based on an oscillation signal from the oscillation circuit.

Abstract: Ultrasonic probes are provided to abate unwanted signal noise. An ultrasonic probe includes a bundle of rods configured to sample data at a first end and propagate a signal encoding the sampled data to a second end. Each of the rods in the bundle of rods has a substantially similar length and a substantially similar diameter. The ultrasonic probe also includes a shell concentrically disposed around the bundle of rods. The shell is configured to pack the bundle of rods together. The shell includes a plurality of grooves configured to abate a prevailing bulk wave sampled by the first end.

Abstract: A reinforcing element for a structural profile, in particular for a round, oval or elliptical structural tube, includes a composite structure, which has a hollow-cylindrical, helically wound mesh of fiber strands which form an inner shell surface configured to receive the structural profile, wherein the fiber strands are respectively embedded in a matrix material, which has an electroactive polymer which can be stretched along a longitudinal extent of the fiber strands by application of an electrical voltage, such that the composite structure can be expanded by application of the electrical voltage to introduce the structural profile into the composite structure and can be shrunk by switching off the electrical voltage to fix the structural profile on the shell surface in the composite structure.

Abstract: At least some embodiments of the present disclosure an electrostatic sheet jamming device comprising a first sheet having a first conductive layer, a first dielectric layer disposed adjacent to the first conductive layer, and a second sheet comprising a second conductive layer and disposed proximate to the first dielectric layer. The first dielectric layer is disposed between the first conductive layer and the second conductive layer. The first sheet and the second sheet are non-extensible and flexible, wherein the first sheet and the second sheet are slidable relative to each other in a first state. The first sheet and the second sheet are jammed with each other in a second state when a voltage is applied between the first conductive layer and the second conductive layer. In some embodiments, the applied voltage is less than or equal to a break-down voltage of air at a distance between the first conductive layer and the second conductive layer.

Abstract: A piezoelectric device and a manufacturing method thereof in which a piezoelectric film formed of a thin film of a lead zirconate titanate-based perovskite oxide is formed on a substrate, and at least a first region out of the first region and a second region of the piezoelectric film is irradiated with electromagnetic waves having a wavelength of 230 nm or less in a reducing atmosphere to provide a difference in piezoelectric characteristics between the first region and the second region so that the first region has a smaller absolute value of a piezoelectric constant d31 and a smaller dielectric loss tan ? than the second region.

Abstract: Acoustic resonator devices and filters are disclosed. An acoustic resonator includes a piezoelectric plate having front and back surfaces and an interdigital transducer (IDT). The IDT has a first pitch/mark zone with interleaved fingers having a pitch equal to a first pitch value P1 and a mark equal to a first mark value M1, and a second pitch/mark zone with interleaved fingers having a pitch equal to a second pitch value P2 and a mark equal to a second mark value M2. A radio frequency signal applied to the IDT causes excitation of a same shear primary acoustic mode by both the first pitch/mark zone and the second pitch/mark zone. P1, M1, P2, and M2, are selected such that an amplitude of spurious modes is reduced as compared to a device having a same primary acoustic mode and a single pitch/mark zone.

Abstract: An elastic wave device that excites main vibration of an SH mode includes a piezoelectric layer formed from a piezoelectric material, a carrier substrate, and an IDT electrode formed on the piezoelectric layer. When a wavelength of an elastic wave, which is determined by an electrode cycle P of the IDT electrode, is represented by ?, the piezoelectric layer has a thickness of 0.15? or more and 1.5? or less. The carrier substrate has an acoustic anisotropy, and is arranged in a crystal orientation that reduces unnecessary vibrations of an SV mode and a vertical L-mode.

Abstract: An acoustic resonator with a reinforcing structure is provided according to the present disclosure. The acoustic resonator includes a substrate and a cavity formed on the substrate, a piezoelectric layer is arranged above the substrate and an opening passing through the piezoelectric layer is formed in a peripheral region of the piezoelectric layer. The reinforcing structure includes a reinforcing layer, part of the reinforcing layer is formed at the edge of the opening with being fitted to the edge, to reinforce a resonant functional layer near the edge of the opening, which can reduce a change in stress of the piezoelectric layer and the lower electrode near the edge of the opening after the cavity is released, so that the piezoelectric layer and the lower electrode do not easily collapse due to stress, thereby ensuring the performance of a device. A method for manufacturing the same is further provided.

Abstract: Systems and apparatus are disclosed relating to improved fluid supply systems. In some examples, the improved fluid supply systems use an electrically controllable proportional valve and a surge prevention process to prevent a surge of pressurized fluid at the end of a welding-type operation. In particular, the surge prevention process may coordinate closure of the proportional valve and an on/off solenoid valve so that pressure in the fluid flow path can equalize to an ambient pressure after a welding operation (and/or a post flow operation) has ended. This coordination ensures that there is no pressure buildup and/or associated surge of fluid when the on/off solenoid valve is next opened (e.g., at the start of the next welding operation).

Abstract: Mechanoluminescent devices and articles, such as wearable articles, that include mechanoluminescent devices. The mechanoluminescent devices may have a lateral type architecture or a vertical type architecture. The mechanoluminescent devices may be sensors, including pressure sensors.

Abstract: A PMUT includes a substrate, a stopper, and a multi-layered structure, where the substrate includes a corner, and a cavity is disposed in the substrate. The stopper is in contact with the corner of the substrate and the cavity. The multi-layered structure is disposed over the cavity and attached to the stopper and the multi-layered structure includes at least one through hole in contact with the cavity.

Abstract: Mechanoluminescent devices and articles, such as wearable articles, that include mechanoluminescent devices. The mechanoluminescent devices may have a lateral type architecture or a vertical type architecture. The mechanoluminescent devices may be sensors, including pressure sensors.

Abstract: Mechanoluminescent devices and articles, such as wearable articles, that include mechanoluminescent devices. The mechanoluminescent devices may have a lateral type architecture or a vertical type architecture. The mechanoluminescent devices may be sensors, including pressure sensors.

Abstract: A through hole formed in an AT-cut crystal plate includes an inclined surface (72) that extends from a peripheral area toward a penetrating part (71) in a center part of the through hole. The inclined surface (72) includes: a first crystal surface S1 that extends from the penetrating part (71) toward the peripheral area of the through hole in a ?Z? and a +X directions; a second crystal surface S2 that extends from the penetrating part (71) toward the peripheral area of the through hole in the ?Z? and the +X directions and that contacts with the first crystal surface S1 in the +Z? and the +X directions of the first crystal surface S1; and a third crystal surface S3 that contacts with the second crystal surface S2 in the +X direction of the second crystal surface S2 and that contacts with the main surface of the AT-cut crystal plate.

Abstract: A piezoelectric generator structure disposed between an upper platform and a lower platform that includes a lower piezoelectric pad, an upper piezoelectric pad, and a connecting shaft. The lower piezoelectric pad coupled to the upper piezoelectric pad via the connecting shaft, where the lower piezoelectric pad is configured to compress under a downward motion of the upper platform during a compression movement due to an additional load being applied to an existing load on a top surface of the upper platform, where the lower piezoelectric pad produces a first voltage due to the compression movement. The upper piezoelectric pad configured to compress under an upward motion of the upper platform during a rebound movement of the upper platform, where the upper piezoelectric pad produces a second voltage due to the rebound movement. The generator structure configured to provide the first and the second voltage to a coupled power storage unit.

Abstract: There is provided a laminated substrate having a piezoelectric film, including: a substrate; a first electrode film provided on the substrate; and a piezoelectric film provided on the first electrode film, wherein an oxide film containing an oxide represented by a composition formula of RuOx or IrOx, is provided on the piezoelectric film.

Abstract: Mechanoluminescent devices and articles, such as wearable articles, that include mechanoluminescent devices. The mechanoluminescent devices may have a lateral type architecture or a vertical type architecture. The mechanoluminescent devices may be sensors, including pressure sensors.

Abstract: A resonant member of a MEMS resonator oscillates in a mechanical resonance mode that produces non-uniform regional stresses such that a first level of mechanical stress in a first region of the resonant member is higher than a second level of mechanical stress in a second region of the resonant member. A plurality of openings within a surface of the resonant member are disposed more densely within the first region than the second region and at least partly filled with a compensating material that reduces temperature dependence of the resonant frequency corresponding to the mechanical resonance mode.

Abstract: Devices and processes for preparing devices are described for reducing resonance of spurious waves in a bulk acoustic resonator and/or for obstructing propagation of lateral waves out of an active region of the bulk acoustic resonator. A first electrode is coupled to a first side of a piezoelectric layer and a second electrode is coupled to a second side of the piezoelectric layer to form a stack having the active region. The piezoelectric layer in the active region is configured to resonate in response to an electrical signal applied between the first electrode and the second electrode. One or more perforations in the first electrode, the piezoelectric layer and/or the second electrode, and/or one or more posts or beams supporting the stack, reduce resonance of spurious waves and obstruct propagation of lateral acoustic waves out of the active region.

Abstract: A display apparatus includes a display panel configured to display an image and a plurality of vibration generating devices on a rear surface of the display panel, the display panel being at least one of a vibration plate configured to output sound and a vibration plate configured to output a haptic vibration. Each of the plurality of vibration generating devices includes a first electrode under the display panel, a piezoelectric member under the first electrode, a damping member in a periphery the piezoelectric member, and a second electrode under the piezoelectric member.

Abstract: An imaging lens driving module includes a base, a casing, a driving mechanism and a damping element. The base has an opening, and the casing has a central aperture corresponding to the opening. The casing includes a plastic frame portion and a metal structure portion. The plastic frame portion is coupled to the base. The metal structure portion has a plurality of pins extending towards the base. The driving mechanism is disposed in the casing. The driving mechanism is configured to drive the lens unit to move in a direction parallel to an optical axis. The damping element is connected to the pins and the lens unit. The metal structure portion is insert-molded with the plastic frame portion to form the casing. The pins are located closer to the optical axis than the other part of the metal structure portion to the optical axis.

Abstract: Provided is a piezoelectric thin film device in which lattice mismatch between a piezoelectric thin film and a lower electrode layer (first electrode layer) is reduced. A piezoelectric thin film device 10 comprises a first electrode layer 6a and a piezoelectric thin film 2 laminated directly on the first electrode layer 6a; the first electrode layer 6a includes an alloy composed of two or more metal elements; the first electrode layer 6a has a face-centered cubic lattice structure; and the piezoelectric thin film 2 has a wurtzite structure.

Abstract: An apparatus for transmitting ultrasonic waves, the apparatus including a microchip (300) for driving a resonant circuit and a resonant circuit which is at least one of an inductance (L) capacitance (C) circuit (LC tank), an antenna and a piezoelectric transducer. The microchip (300) is a single unit which includes a plurality of interconnected embedded components and subsystems including at least an oscillator (315), a pulse width modulation (PWM) signal generator subsystem (329), an analogue to digital converter (ADC) subsystem (318) and a digital to analogue converter (DAC) subsystem (327).

Abstract: A sensor element includes a piezoelectric body and a plurality of electrodes. The piezoelectric body, when viewed on a plane, includes a base part and at least one arm part extending from the base part. The plurality of electrodes are located on a surface of the arm part. The piezoelectric body, when viewed on the plane, further includes a frame part which surrounds the base part and the at least one arm part and upon which the base part is bridged.

Abstract: A multi-axis MEMS assembly includes: a micro-electrical-mechanical system (MEMS) actuator configured to provide linear three-axis movement; and an optoelectronic device coupled to the micro-electrical-mechanical system (MEMS) actuator.

Abstract: A resin composition for an acoustic matching layer; an acoustic matching sheet formed from the composition; an acoustic wave probe; an acoustic wave measuring apparatus; a method for manufacturing an acoustic wave probe; and a material set, for an acoustic matching layer, that is suitable for preparation of the composition, in which the resin composition for an acoustic matching layer includes a binder including a resin; and metal particles having a monodispersity of 40% to 80%, wherein the monodispersity is calculated by equation (1): monodispersity (%)=(standard deviation of particle sizes of metal particles/average particle size of metal particles)×100.

Abstract: A microchip (300) for driving a resonant circuit, wherein the resonant circuit is an inductance (L) capacitance (C) circuit (LC tank), an antenna or a piezoelectric transducer, and wherein the microchip (300) is a single unit which includes a plurality of interconnected embedded components and subsystems including at least an oscillator (315), a pulse width modulation (PWM) signal generator subsystem (329), an analogue to digital converter (ADC) subsystem (318) and a digital to analogue converter (DAC) subsystem (327).

Abstract: An ultrasound generation member according to an aspect of the present invention includes an ultrasound generation element configured to emit ultrasound in a direction of a target object in one specific container of a plurality of containers. An ultrasound emission device according to an aspect of the present invention includes the ultrasound generation member, and a drive power supply configured to apply voltage across the ultrasound generation element of the ultrasound generation member. An ultrasound emission device according to an aspect of the present invention includes the ultrasound generation member that includes, as the ultrasound generation element, a plurality of ultrasound generation elements, and a drive power supply configured to apply voltage across the plurality of ultrasound generation elements of the ultrasound generation member.

Abstract: A method for isolating vibrations for centrifuge testing devices is provided. The method comprises coupling a test payload platform to a number of piezoelectric actuators and coupling the piezoelectric actuators to a reaction mass coupled to a centrifuge arm. A layer of vibration-absorbing material is sandwiched between the reaction mass and the centrifuge arm. The centrifuge arm is rotated around an axis, and the test payload platform is vibrated with the piezoelectric actuators as the centrifuge rotates, wherein the layer of vibration-absorbing material prevents vibrations from traveling down the centrifuge arm.

Abstract: A MEMS actuator includes a monolithic body of semiconductor material, with a supporting portion of semiconductor material, orientable with respect to a first and second rotation axes, transverse to each other. A first frame of semiconductor material is coupled to the supporting portion through first deformable elements configured to control a rotation of the supporting portion about the first rotation axis. A second frame of semiconductor material is coupled to the first frame by second deformable elements, which are coupled between the first and the second frames and configured to control a rotation of the supporting portion about the second rotation axis. The first and second deformable elements carry respective piezoelectric actuation elements.

Abstract: An ultrasonic transducer device for use in an acoustic biometric imaging system, the ultrasonic transducer device comprising: a first piezoelectric element having a first face, a second face opposite the first face, and side edges extending between the first face and the second face; a first transducer electrode on the first face of the first piezoelectric element; a second transducer electrode on the second face of the first piezoelectric element; and a spacer structure leaving at least a portion of the first transducer electrode of the first piezoelectric element uncovered.

Abstract: Example implementations may relate to methods and systems for detecting an event in a physical region within a physical space. Accordingly, a computing system may receive from a subscriber device an indication of a virtual region within a virtual representation of the physical space such that the virtual region corresponds to the physical region. The system may also receive from the subscriber a trigger condition associated with the virtual region, where the trigger condition corresponds to a particular physical change in the physical region. The system may also receive sensor data from sensors in the physical space and a portion of the sensor data may be associated with the physical region. Based on the sensor data, the system may detect an event in the physical region that satisfies the trigger condition and may responsively provide to the subscriber a notification that indicates that the trigger condition has been satisfied.

Abstract: An elastic wave device manufacturing method includes a preparing a piezoelectric wafer on which IDT electrodes are provided in elastic wave device forming portions, providing on a first main surface of the piezoelectric wafer support layers in the elastic wave device forming portions, bonding a cover member to cover the support layers to obtain a multilayer body, cutting the multilayer body in a first direction multiple times, cutting the multilayer body in a second direction orthogonal to the first direction to obtain elastic wave devices, in which a resin layer extends across a boundary between the elastic wave device forming portions adjacent to each other on the first main surface of the piezoelectric wafer, and the second cutting step is performed in a state in which the resin layer is present.

Abstract: An energy converting device includes a base, which is fixed; a methylammonium lead bromide (MAPbBr3) material having a first end fixedly attached to the base and a second end free to move; and an actuator block attached to the second end of the MAPbBr3 material. The actuator block moves relative to the base when the MAPbBr3 material is exposed to light.

Abstract: A piezoelectric composition comprises an oxide having a perovskite structure, wherein the oxide contains bismuth, barium, iron and titanium; the X-ray diffraction pattern of the piezoelectric composition after a polarization treatment has a first peak and a second peak in the range of the diffraction angle 2? of 38.6° or more and 39.6° or less; the diffraction angle 2? of the first peak is smaller than the diffraction angle 2? of the second peak; an intensity of the first peak is represented as IL; an intensity of the second peak is represented as IH; and IH/IL is 0.00 or more and 2.00 or less.

Abstract: Provided are a directional acoustic sensor that detects a direction of sound, a method of detecting a direction of sound, and an electronic device including the directional acoustic sensor. The directional acoustic sensor includes a sound inlet through which a sound is received, a sound outlet through which the sound received through the sound inlet is output, and a plurality of vibration bodies arranged between the sound inlet and the sound outlet, in which one or more of the plurality of vibration bodies selectively react to the sound received by the sound inlet according to a direction of the received sound.

Abstract: A film bulk acoustic resonator (FBAR) structure includes, a bottom cap wafer, a piezoelectric layer disposed on the bottom cap wafer, the piezoelectric layer including lithium niobate or lithium tantalate, a bottom electrode disposed below the piezoelectric layer, and a top electrode disposed above the piezoelectric layer. Portions of the bottom electrode, the piezoelectric layer, and the top electrode that overlap with each other constitute a piezoelectric stack. The FBAR structure also includes a cavity disposed below the piezoelectric stack. A projection of the piezoelectric stack is located within the cavity.

Abstract: A film structure body has: a substrate that is a silicon substrate including an upper surface composed of a (100) plane; an orientation film including a zirconium oxide film that is cubic crystal (100)-oriented on the upper surface; and a conductive film including a platinum film that is cubic crystal (100)-oriented on the orientation film.

Abstract: Technologies for a microelectromechanical system (MEMS) made up of composable piezoelectric actuators is disclosed. An elongated piezoelectric rod is disposed between a top and a bottom electrode. The top electrode runs along one edge of the top of the piezoelectric rod for a first segment, then runs along the other edge of the top of the piezoelectric rod for the a second segment. When a voltage is applied across the electrodes, the piezoelectric rod bends in a first direction for the first segment and in a second direction opposite the first for the second segment, displacing the tip of the rod. Several such rods can be joined in parallel and/or series, allowing for large-scale systems to be composed.

Abstract: Mechanoluminescent devices and articles, such as wearable articles, that include mechanoluminescent devices. The mechanoluminescent devices may have a lateral type architecture or a vertical type architecture. The mechanoluminescent devices may be sensors, including pressure sensors.

Abstract: An actuator device for a wind turbine, in particular for a rotor blade of a wind turbine, and also to an associated wind turbine and a method of assembly, with an actuator component and a control component, wherein the actuator component has at least one actuator layer with a preferential direction and, substantially parallel to the actuator layer, at least one exciting layer, wherein the actuator layer comprises a photoactuator, wherein the photoactuator is designed to change a strain and/or stress of the actuator layer in the preferential direction on the basis of excitation light, wherein the exciting layer is designed to guide excitation light into the actuator layer, wherein the control component comprises a light source and a light guide, wherein the light source is arranged away from the exciting layer and is connected to the exciting layer by means of the light guide and wherein the light guide runs in different directions through the exciting layer.

Abstract: A power generation device is provided. A weight may vibrate in one direction as an axial direction in response to an external vibration. A beam may be arranged in at least one side with respect to the weight in the axial direction of the weight, and vibrate together with the weight. A piezoelectric element may be mounted on the beam. A guide may include a hollow guiding a movement of the weight in the axial direction. A stopper may be included in the weight. The stopper may restrict an amount of the movement of the weight in the axial direction within a predetermined amount. A stopper wall may stop the movement of the weight in the axial direction by contacting with the stopper.

Abstract: A piezoelectric motor may include a stator, a rotor rotating about a rotational axis and at least one piezoelectric element driving the rotor and maintained by the stator. Mechanical reliability and performance levels of a piezoelectric motor may be increased in that the at least one piezoelectric element may be mounted in an oscillating housing that oscillates with respect to the stator about the pivot axis.

Abstract: An apparatus comprises a piezoelectric element and a mechanical energy storage unit. The mechanical energy storage unit can be configured to receive a force and store the force as stored mechanical energy. The apparatus further comprises a mass configured to receive the stored mechanical energy from the mechanical energy storage unit when the stored mechanical energy is released, move with a velocity as a result of receiving the stored mechanical energy, and deform the piezoelectric element based on the velocity of the mass.

Abstract: A method of forming a piezoelectric thin film includes sputtering a first surface of a substrate to provide a piezoelectric thin film comprising AlN, AlScN, AlCrN, HfMgAlN, or ZrMgAlN thereon, processing a second surface of the substrate that is opposite the first surface of the substrate to provide an exposed surface of the piezoelectric thin film from beneath the second surface of the substrate, wherein the exposed surface of the piezoelectric thin film includes a first crystalline quality portion, removing a portion of the exposed surface of the piezoelectric thin film to access a second crystalline quality portion that is covered by the first crystalline quality portion, wherein the second crystalline quality portion has a higher quality than the first crystalline quality portion and processing the second crystalline quality portion to provide an acoustic resonator device on the second crystalline quality portion.

Abstract: A surface acoustic wave device includes a quartz layer, a piezoelectric layer, and an Inter Digital Transducer. A rotation in a right-screw direction is assumed as a +-rotation. A three-dimensional coordinate system formed by an x1-axis, a y1-axis, and a z1-axis respectively matching an X-axis, a Y-axis, and a Z-axis as crystallographic axes of a quartz-crystal is rotated from +125.25° in a range of ±3° with the x1-axis as a rotation axis. Subsequently, the three-dimensional coordinate system is rotated from +45° in a range of ±2° with the z1-axis as the rotation axis. Subsequently, the three-dimensional coordinate system is rotated from ?45° in a range of ±2° with the x1-axis as the rotation axis. The quartz layer is cut along a surface as a sectional plane perpendicular to the z1-axis. The quartz layer has a propagation direction of the surface acoustic wave in a direction parallel to the x1-axis.

Abstract: A sensor system includes a sensor and an optical source. The sensor has a receptor configured to bind to a chemical species. A spacer is bound to the receptor, and a fluorophore is bound to the spacer. The optical source is configured to irradiate the sensor to dissociate the chemical species from the receptor. The optical source can be infrared light, microwave or radio wave. The sensor system optionally includes a photodetector configured to determine an amount of the chemical species by measuring fluorescence when the optical source irradiates the sensor.

Abstract: A system and method in a building or vehicle for an actuator operation in response to a sensor according to a control logic, the system comprising a router or a gateway communicating with a device associated with the sensor and a device associated with the actuator over in-building or in-vehicle networks, and an external Internet-connected control server associated with the control logic implementing a PID closed linear control loop and communicating with the router over external network for controlling the in-building or in-vehicle phenomenon. The sensor may be a microphone or a camera, and the system may include voice or image processing as part of the control logic. A redundancy is used by using multiple sensors or actuators, or by using multiple data paths over the building or vehicle internal or external communication. The networks may be wired or wireless, and may be BAN, PAN, LAN, WAN, or home networks.