Abstract: A surface acoustic wave resonator includes a piezoelectric substrate, a first surface acoustic wave resonator having a comb electrode provided on the piezoelectric substrate, and a second surface acoustic wave resonator having a comb electrode provided on the piezoelectric substrate. The first surface acoustic wave resonator and the second surface acoustic wave resonator are apodized and connected in parallel.

Abstract: An ultrasonic sensor, in particular for a vehicle, including a housing, includes the following: a transducer element which is attached to the bottom of the housing for generating ultrasonic oscillations; a first damping element situated in the housing for damping oscillations of the bottom; and a cover for sealing the housing, the cover being provided with a second damping element and having continuous tapering of the cover thickness in the region of the second damping element.

Abstract: A piezoelectric device includes: a base substrate; an electronic component provided on a first surface of the base substrate; and a piezoelectric resonator that is provided on the first surface of the base substrate without planarly overlapping with the electronic component and have a package base, a mounting surface of the package base having one of a recessed part and a cutout part. In the device, the base substrate includes a resonator-disposing section disposed in a region of the one of the recessed part and the cutout part of the piezoelectric resonator and the resonator-disposing section is a part of the base substrate in plan view and is coupled to a bottom surface of the one of the recessed part and the cutout part.

Abstract: An ultrasonic actuator may be provided in which generation of a stress is prevented in the connection face of the piezoelectric element between the electrodes and the conductive members. The ultrasonic actuator includes a piezoelectric element (P1) and flexible cables (F1). The piezoelectric element (P1) includes: a piezoelectric layer (1); a power supply electrode (2) provided on a principal surface of the piezoelectric layer (1); a counter electrode (3) provided to face the power supply electrode (2) with the piezoelectric layer (1) interposed therebetween; a power supply external electrode (4) which is provided on a short-side surface of the piezoelectric element (P1), and is electrically coupled to the power supply electrode (2); and a counter external electrode (5) which is provided on a short-side surface of the piezoelectric element (P1), and is electrically coupled to the counter electrode (3).

Abstract: A self-powered impulse detecting system comprising a signal transmitter; an energy storage component; and an energy harvester comprising a top plate configured to receive a stress impulse by an external object on its top surface; a bottom plate positioned opposite to the top plate and leaving room in between the bottom plate and the top plate; an elastic element positioned in between the top plate and the bottom plate; a bendable substrate attached at a first end to the bottom surface of the top plate, the bendable substrate is configured to bend freely, colliding with the top plate and a stopper; a piezoelectric element positioned on the bendable substrate; a deadweight attached to a second end of the bendable substrate; wherein collisions between the bendable substrate, the top plate and the stopper cause the bendable substrate to bend along with the piezoelectric element to generate power.

Abstract: An electronic device having a piezoelectric pump. The electronic device includes: an audio input section; an audio recording section recording input sound from the audio input section; a piezoelectric pump cooling air by a piezoelectric element; a drive circuit driving the piezoelectric element; and a control circuit monitoring and controlling operation of the audio input section, the audio recording section, and the drive circuit, wherein when an operation mode being monitored is an audio recording mode, in which the input sound is used for recording by the audio recording section, the control circuit controls the drive circuit to decrease the amount of air flow exhausted outside from the piezoelectric pump, and when the operation mode being monitored is another mode without audio recording, the control circuit maintains the amount of the air flow.

Abstract: A piezoelectric thin film element includes a substrate, a lower electrode, a piezoelectric thin film, and an upper electrode. The lower electrode, the piezoelectric thin film and the upper electrode are formed on the substrate. The piezoelectric thin film includes a polycrystal thin film including crystal grains, an alkali niobium oxide based perovskite structure represented by a general formula: (K1-xNax)NbO3 (0.4<x<0.7), a film thickness of not less than 1 ?m and not more than 10 ?m, a columnar structure configured by the crystal grains, a majority of the crystal grains including a shape in a cross-section direction thereof longer than in a plane direction of the substrate, and an average crystal grain size of not less than 0.1 ?m and not more than 1.0 ?m in the plane direction of the substrate.

Abstract: An apparatus for producing a holding or transmission frame (12, 20) for an electrostrictive actuator, in particular, a stacked piezoactuator (5) includes the following steps: a) a winding spindle (52), corresponding to the shape of the inner periphery of the frame (12, 20), is wound with several layers of a unidirectional prepreg for forming a laminate body; b) the laminate body is hardened; c) the hardened laminate body in the frame is cut by sections parallel to the direction of winding. An electrostrictive drive (100) includes an electrostrictive actuator (5) in which the length varies during actuation, and a transmission frame (12) that surrounds the actuator, is connected to the actuator for initiating the variation in length of the actuator and for amplifying the actuator, the transmission frame (12) being made of a prepreg that is wound in the laminate body and hardened.

Abstract: An ultrasonic motor includes a driven object, a piezoelectric element for driving the driven object, a vibration plate including a notch having an inner peripheral surface of an arc-shaped form having a central angle larger than 180 degrees and being vibrated by the piezoelectric element, and a contact portion made of a material different from that of the vibration plate, having a portion overlapping the piezoelectric element in a plan view and being smaller in thickness than the piezoelectric element, attached to the notch of the vibration plate by press fitting or forced fitting and being in contact with the driven object. Thereby, the ultrasonic motor can have a high shock resistance and a high wear resistance, and can be driven with high efficiency.

Abstract: The cylindrical piezoelectric actuator which comprised a piezoelectric element which provided electrode in each of an inner peripheral face and an outer peripheral face which was cylindrical at least, and drive power supply to drive it. And the outer side electrode of the piezoelectric element covered the substantially circumferential outer face entirety and it was connected to a ground potential, and the electrode in the internal perimeter surface connected to drive power supply.

Abstract: A movable table unit provided here has a simple structure but can increase the precision of detecting the displacement of a movable table, and comprises a quadrangle frame-shaped stationary base a movable table disposed inside the stationary base, spring members interposed between the movable table and the stationary base, and a piezoelectric element fixed to either the stationary base or the movable table and capable of expanding/contracting in the axis direction to exert either an expansion or contraction force on the other, to allow the movable table to move relative to the stationary base. A strain gauge is mounted in a strain occurrence site where strain occurs as the movable table moves, so that the amount of travel of the movable table is detected on the basis of the value detected by the strain gauge.

Abstract: A piezoelectric generator that includes a piezoelectric element having first and second surfaces on which a first electrode and a second electrode are disposed. A vibrating plate is bonded to the piezoelectric element such that the first surface is adjacent thereto. The vibrating plate includes a first bend disposed at a first side of a vibrating-plate main section to which the piezoelectric element is bonded and a second bend disposed at a second side thereof. A support member supports the vibrating plate at a location outside the first and second bends. A vibration body including the vibrating-plate main section and the piezoelectric element is supported at both ends.

Abstract: A piezoelectric resonator element includes: a resonating arm extending in a first direction and cantilever-supported; a base portion cantilever-supporting the resonating arm; and an excitation electrode allowing the resonating arm to perform flexural vibration in a second direction that is orthogonal to the first direction. In the piezoelectric resonator element, the resonating arm includes an adjusting part adjusting rigidity with respect to a bend in a third direction that is orthogonal to the first and second directions.

Abstract: To achieve small-sized formation by shortening a total length after ensuring a length of a base portion capable of sufficiently reducing vibration leakage, there is provided a piezoelectric vibrating piece 2 including a piezoelectric plate 10 including a pair of vibrating arm portions 11, 12 arranged in parallel with each other in a state of being extended in one direction from base ends to front ends, and a base portion 13 having connecting portions 13a respectively connected to the pair of vibrating arm portions at middle positions from the base ends to the front ends for integrally supporting the pair of vibrating arm portions by way of the connecting portions, exciting electrodes 20, 21 respectively formed on outer surfaces of the pair of vibrating arm portions for vibrating the pair of vibrating arm portions when a drive voltage is applied thereto, a pair of mount electrodes 22, 23 formed on an outer surface of the base portion and electrically connected respectively to the pair of exciting electrodes, i

Abstract: To provide a piezoelectric resonator in which a casing houses a tuning-fork piezoelectric resonator element and whose failure occurrence caused when shavings of adjustment films scatter and adhere to excitation electrodes is prevented.

Abstract: A piezoceramic material according to an embodiment of the present invention has a composition represented by Pbm{Zr1-x-y-zTixSny(Sb1-nNbn)z}O3 where 1.000?m?1.075, 0.470?x<0.490, 0.020?y?0.040, 0<n<1.000 and 0<z?0.025 and a crystallite size of 30 to 39 nm.

Abstract: A device for damping of vibrations for an item of equipment comprising a structure to which a first element and a second fragile element having to be protected from the vibrations are coupled. The device comprises first piezoelectric transducer means inserted between the structure and the first element and charged with converting energy of vibration of the structure into electric energy, at least one sensor coupled to the structure and arranged to deliver measurement signals representative of vibrations, control means electrically supplied by the electric energy generated and charged with deducing at least one amplitude of movement to compensate at least partially for the vibration, and to deliver control signals representative of each determined amplitude, and second piezoelectric transducer means inserted between the structure and the second element and charged with converting the control signals into movement to damp at least partially for the second element the vibrations.

Abstract: The present invention relates to a micro-electro-mechanical systems (MEMS) vibrating structure supported by a MEMS anchor system, and includes a single-crystal piezoelectric thin-film layer having domain inversions, which determine certain vibrational characteristics of the MEMS vibrating structure. The MEMS vibrating structure may have dominant lateral vibrations or dominant thickness vibrations. The single-crystal piezoelectric thin-film layer may include Lithium Tantalate or Lithium Niobate, and may provide MEMS vibrating structures with precise sizes and shapes, which may provide high accuracy and enable fabrication of multiple resonators having different resonant frequencies on a single substrate.

Abstract: A sensor for detecting a physical quantity includes a piezoelectric thin film device having a lower electrode, a piezoelectric thin film and an upper electrode, and a voltage detecting device connected between the lower and upper electrodes of the piezoelectric thin film device. The piezoelectric thin film is formed of an alkali niobium oxide-based perovskite material expressed by (K1-xNax)NbO3 (0<x<1), and a (001)KNN plane diffraction peak of the piezoelectric thin film indicates an angle 2? from 22.1° to 22.5° in an X-ray diffraction 2?/? measurement to a surface of the piezoelectric thin film, and the (001)KNN plane diffraction peak occupies 80% or more of diffraction peaks of the piezoelectric thin film.

Abstract: An ultrasound transducer includes a substrate, an ultrasound transducer cell placed on one surface of the substrate and having a lower electrode, a first gap portion placed on the lower electrode and an upper electrode placed on the first gap portion, a first conductive layer placed on the other surface of the substrate and electrically connected to one of the lower electrode and the upper electrode, an electret film placed on the first conductive layer, an insulating layer placed on the electret film, and a second conductive layer placed on the insulating layer and electrically connected to the one of the lower electrode and the upper electrode not electrically connected to the first conductive layer.