Abstract: Disclosed herein is a piezo vibration module, including: a piezo element having a pattern of an internal electrode printed therein and having an external electrode connected to the internal electrode disposed on an outer surface thereof; a flexible printed circuit board (FPCB) having each terminal and applying power to the external electrodes of the piezo element; and a conductive adhesive interposed between the piezo element and the FPCB to electrically connect the piezo element to the flexible printed circuit board.

Abstract: Disclosed is a bulk acoustic wave resonator (BAWR). The BAWR includes a bulk acoustic wave resonance unit with a first electrode, a second electrode, and a piezoelectric layer. The piezoelectric layer is disposed between the first electrode and the second electrode. An air edge is formed at a distance from a center of the bulk acoustic wave resonance unit.

Abstract: A barium titanate piezoelectric ceramic having good piezoelectric properties and mechanical strength and a piezoelectric element that includes the ceramic are provided. A method for making a piezoelectric ceramic includes forming a compact containing barium titanate particles, sintering the compact, and decreasing the temperature of the compact. The sintering includes (A) increasing the temperature of the compact to a temperature range of a shrinking process of the compact; (B) increasing the temperature of the compact to a temperature range of a liquid phase sintering process of the compact; (C) decreasing the temperature of the compact to the temperature range of the shrinking process of the compact; and (D) retaining the third temperature.

Abstract: An acoustic resonator device comprises: a substrate comprising a cavity or an acoustic mirror; a first electrode disposed over the substrate; a piezoelectric layer disposed over the first electrode; and a second electrode disposed over the piezoelectric layer. The first electrode or the second electrode, or both, are made of an electrically conductive material having a positive temperature coefficient.

Abstract: A piezoelectric vibration device for a mobile terminal is disclosed. A bimorph piezoelectric vibrator includes a pair of piezoelectric element layers connected to one of positive and negative poles and a middle electrode plate interposed between the piezoelectric element layers and connected to the other pole. The piezoelectric vibrator generates vibration due to up/down bending displacement by fixing both end portions thereof to an inner surface of a casing of a mobile terminal. A voltage-boosting transformer raises a power source voltage of a mobile terminal to a driving voltage. A driving chip receives the raised driving voltage from the voltage-boosting transformer and drives the piezoelectric vibrator. Weights are attached to at least one of both sides of the piezoelectric vibrator to amplify vibration. Insulation members are provided at both end portions of the piezoelectric vibrator to prevent electricity applied to the piezoelectric vibrator from leaking to the casing.

Abstract: A high temperature ultrasonic probe and a mounting fixture for attaching and aligning the probe to a steam pipe using blind alignment. The high temperature ultrasonic probe includes a piezoelectric transducer having a high temperature. The probe provides both transmitting and receiving functionality. The mounting fixture allows the high temperature ultrasonic probe to be accurately aligned to the bottom external surface of the steam pipe so that the presence of liquid water in the steam pipe can be monitored. The mounting fixture with a mounted high temperature ultrasonic probe are used to conduct health monitoring of steam pipes and to track the height of condensed water through the wall in real-time.

Abstract: The present disclosure includes: a magnetostrictive plate including a magnetostrictive material; a yoke around which a coil is wound and which has two ends magnetically connected to a surface of the magnetostrictive plate; and a bias magnet that generates bias magnetic flux circulating from one of the two ends of the yoke to the other one of the two ends through the yoke. Here, the magnetostrictive plate is surface-bonded to a non-magnetic structural body.

Abstract: A piezoelectric component has at least one piezoelectric ceramic layer and at least one electrode adjacent the piezoelectric ceramic layer. The piezoelectric ceramic layer has a piezoelectric ceramic material of the general formula Pb1-x-y-[(2a-b)/2]-p/2V[(2a-b)/2-p/2]?CupBaxSry[(TizZr1-z)1-a-bWaREb]O3, where 0?x?0.035, 0?y?0.025, 0.42?z?0.5, 0.0045?a?0.009, 0.009?b?0.011, 2a>b, p?2a?b, RE is a rare earth metal, and V? is a Pb vacancy.

Abstract: A self-power synchronized switch harvesting on inductor circuit for harvesting energy from a piezoelectric element generating an AC voltage, comprises an envelope detector having first and second capacitors connected in parallel with the piezoelectric element and functioning as negative and positive voltage detectors. An inductor is connected in parallel with the capacitors, and transistors are connected in circuit with the capacitors and inductor and are responsive to a change in voltage across the first capacitor from positive to negative to enable flow of positive voltage to the inductor until terminal voltage reaches a certain amount and current in the inductor reaches zero. A full-wave rectifier is connected to convert the AC output of the piezoelectric element to DC voltage, and a DC-DC converter is connected to adapt the power output of the rectified voltage.

Abstract: A surface-launched acoustic wave sensor tag system for remotely sensing and/or providing identification information using sets of surface acoustic wave (SAW) sensor tag devices is characterized by acoustic wave device embodiments that include coding and other diversity techniques to produce groups of sensors that interact minimally, reducing or alleviating code collision problems typical of prior art coded SAW sensors and tags, and specific device embodiments of said coded SAW sensor tags and systems. These sensor/tag devices operate in a system which consists of one or more uniquely identifiable sensor/tag devices and a wireless interrogator. The sensor device incorporates an antenna for receiving incident RF energy and re-radiating the tag identification information and the sensor measured parameter(s). Since there is no power source in or connected to the sensor, it is a passive sensor. The device is wirelessly interrogated by the interrogator.

Abstract: An electro-mechanical transducer element is disclosed. The electro-mechanical transducer element includes a first electrode formed on a substrate; an electro-mechanical transducer film formed on at least a part of the first electrode; and a second electrode formed on at least a part of the electro-mechanical transducer film. In at least one cross section of the electro-mechanical transducer film, a film thickness distribution shape is convex to the second electrode side.

Abstract: A flow energy harvesting device having a harvester pipe includes a flow inlet that receives flow from a primary pipe, a flow outlet that returns the flow into the primary pipe, and a flow diverter within the harvester pipe having an inlet section coupled to the flow inlet, a flow constriction section coupled to the inlet section and positioned at a midpoint of the harvester pipe and having a spline shape with a substantially reduced flow opening size at a constriction point along the spline shape, and an outlet section coupled to the constriction section. The harvester pipe may further include a piezoelectric structure extending from the inlet section through the constriction section and point such that the fluid flow past the constriction point results in oscillatory pressure amplitude inducing vibrations in the piezoelectric structure sufficient to cause a direct piezoelectric effect and to generate electrical power for harvesting.

Abstract: This invention concerns a piezoelectric energy harvesting device or actuator comprising a piezoelectric material (12) on a substrate (14). The piezoelectric material is divided into a plurality of discrete regions to provide a plurality of piezoelectric elements (16) on the substrate which are electrically insulated from each other. The elements are preferably disposed along the length of a cantilevered beam. The piezoelectric layer may be divided or further divided with an insulating gap extending in the longitudinal direction of the beam for energy harvesting in torsional mode(s) of beam vibration as well as bending modes.

Abstract: There is provided a vibrator including: a housing having an internal space; an elastic member including a housing fixed part fixed to the housing, a piezoelectric element mounted part disposed so as to face the housing fixed part, and a weight body installed part disposed adjacent to the housing fixed part; a piezoelectric element fixed to the piezoelectric element mounted part; and a weight body fixed to the weight body installed part, wherein the elastic member has a closed curve shape.

Abstract: An actuator includes a vibrating piezoelectric element and a holding section configured to hold the piezoelectric element. The holding section includes a first supporting section arranged on a vibrating surface of the piezoelectric element and arranged on one side of the piezoelectric element and a second supporting section arranged on the other side of the piezoelectric element.

Abstract: An acoustic wave device includes a piezoelectric substrate, an IDT electrode including plural electrode fingers disposed above an upper surface of the piezoelectric substrate, a first dielectric film made of oxide disposed above the upper surface of the substrate for covering the electrode fingers, and a second dielectric film made of non-oxide disposed on upper surfaces of the electrode fingers and between the first dielectric film and each of the electrode fingers. The first dielectric film contacts the upper surface of the piezoelectric substrate at a position between electrode fingers out of the plural electrode fingers adjacent to each other. The acoustic wave device prevents the electrode fingers of the IDT electrode from corrosion.

Abstract: A bearing includes at least an inner ring, an outer ring, and rolling bodies arranged between the inner and outer rings, one of the rings being designed to turn and the fixed, and one of the rings including an inducing element is designed to generate an inducing electromagnetic field, the other of the rings including an electrical circuit in which an induced current is generated when one of the rings turns in relation to the other of the rings, and when the inducing element generates an inducing electromagnetic field, wherein the inducing element designed to generate an inducing electromagnetic field includes a module having a piezoelectric effect and/or a module having a thermoelectric effect.

Abstract: Implementations herein relate to a bistable piezoelectric cantilever vibration energy generator based on spherical composite structure with partial separation of different layers that includes a beam bracket and a shell. The shell is spherical, the bottom of the shell has a circular opening. The beam bracket and the shell are fixed to the base respectively. Vibration of the beam bracket can cause deformation of the piezoelectric cantilever beam, the piezoelectric cantilever beam generates electrical energy using the piezoelectric effect during deformation. The bistable piezoelectric cantilever vibration energy generator further includes twenty-five piezoelectric oscillator structures, and the lengths of the cantilever beam in the same layer are different such as to form a wide resonance frequency domain and to substantially increase power generation.

Abstract: A piezoelectric/electrostrictive element includes a substrate, an adhesive layer, a first conductive layer, an anchor portion and a second conductive layer. The substrate contains a ceramic as a main component. The substrate has a main surface. The adhesive layer is formed on the main surface of the substrate. The adhesive layer contains a metal oxide as a main component. The first conductive layer is formed on the adhesive layer. The anchor portion is formed on the adhesive layer. The anchor portion is embedded in the conductive layer. The anchor portion contains glass as a main component. The second conductive layer is disposed opposite to the first conductive layer with the substrate located in-between.

Abstract: There is provided a vibration generating apparatus including: a housing having an internal space; a vibrator disposed and vibrating within the housing; and a plurality of damper members installed in at least one of the housing and the vibrator and formed of different materials, wherein the plurality of damper members are overlapped and formed integrally with each other or are disposed to be adjacent to each other.