Abstract: A drum-type wide-frequency piezoelectric power generation apparatus may include a protective layer pasted on piezoelectric layer through epoxy resin glue or other conductive adhesives. The piezoelectric layer is pasted on the base layer through epoxy resin or other conductive adhesives. One side of piezoelectric vibrators are fixed on the end cap “a” through the clamp and are away from a first permanent magnet. The end cap “a” provided an octagonal boss “a”. There are bosses “b”, “c”, “d” on the surface of boss “a”. The four piezoelectric vibrators are fixed on four symmetry planes of bosses “a”, “b”, “c”, “d”. The four planes of end cap “a” are fixed on piezoelectric vibrator corresponding to four straight slots respectively, which are used to fix the clamp. The auxiliary magnet is closer to the center of end cap “b” than second permanent magnet. Each of second permanent magnets has a corresponding auxiliary magnet. The first second permanent magnets are mutually exclusive.

Abstract: Provided are an electroacoustic transduction film and an electroacoustic transducer capable of reproducing a sound with a sufficient sound volume and preventing deterioration of appearance. The electroacoustic transduction film includes: a polymer composite piezoelectric body in which piezoelectric body particles are dispersed in a viscoelastic matrix formed of a polymer material having viscoelasticity at a normal temperature; a lower thin film electrode laminated on one principal surface of the polymer composite piezoelectric body; a lower protective layer laminated on the lower thin film electrode; an upper thin film electrode formed on the other principal surface of the polymer composite piezoelectric body; an upper protective layer laminated on the upper thin film electrode; and a colored layer laminated on at least one of a surface layer side of the upper thin film electrode and a surface layer side of the lower thin film electrode.

Abstract: An IC for heating includes a semiconductor substrate on which a diffusion layer is formed; a first pad and a first via that apply a power voltage to the diffusion layer; and a second pad and a second via that apply a ground voltage to the diffusion layer. The vias overlap with an area on which the diffusion layer is formed in a plan view, the first pad overlaps with the first via in a plan view, and the second pad overlaps with the second via in a plan view. The current flowing through the first pad and the first via, the second pad and the second via, and the diffusion layer flows between an upper surface of the first pad and a lower surface of the first via, and a lower surface of the second via and an upper surface of the second pad.

Abstract: A piezoelectric energy harvester is provided. The piezoelectric energy harvester includes a housing, a metal plate, a first piezoelectric material, an auto-returning device, a movable supporter, a first magnet and a second magnet. The housing includes a bottom plate, a top plate, a first side wall and a second side wall. A first terminal of the metal plate is fixed on the first side wall and a second terminal of the metal plate extends toward the second side wall. The first piezoelectric material is disposed on the metal plate to be deformed when the metal plate is deformed. When the movable supporter is moved, the movable supporter can push the second terminal of the metal plate to deform the metal plate. The first magnet and the second magnet are respectively disposed on the bottom plate and the top plate to attract the second terminal of the metal plate.

Abstract: Disclosed examples include ultrasonic lens cleaning systems and driver circuits to clean a lens using four or more transducer segments mechanically coupled to the lens, in which the driver circuit provides phase shifted oscillating signals to the transducer segments to generate a mechanical traveling wave rotating around the center axis of the lens to vibrate the lens for improved ultrasonic cleaning.

Abstract: An ultrasonic probe is provided that makes it possible to increase the shock resistance of a board of an ultrasonic device unit. An ultrasonic probe includes a housing. The housing defines an opening and an accommodation space that is continuous with the opening. An ultrasonic device unit is disposed in the accommodation space. A board has on its first surface an ultrasonic transducer that faces the opening. A rigid body is in contact with a second surface of the board and the housing. The rigid body has higher stiffness than the board.

Abstract: A multilayer component includes a main body and an external contact. The external contact has a connection element and a contact layer. The contact layer electrically conductively connects the main body to the connection element. A connection between the main body and the connection element is produced by sintering of the contact layer.

Abstract: An ultrasonic wave generation apparatus that includes an ultrasonic wave generation element having an inner space formed by bonding first and second vibrators so as to close off a through-hole or a groove provided in a frame body, and a connecting member that is bonded to the second vibrator supports the ultrasonic wave generation element and is electrically connected to at least one of the first and second vibrators. A ventilation hole that opens into a first side surface of the frame body and that allows the inner space to communicate with the exterior is provided in the frame body. When a direction parallel to the first main surface or the second main surface is a lengthwise direction, an outer side end portion of the ventilation hole in the lengthwise direction and an inner side end portion in the lengthwise direction of the connecting member do not match.

Abstract: An electric energy scavenger device has a housing forming an internal chamber with an internal wall, and a movable element contained within the internal chamber. The movable element is freely movable and unconnected to any other movable element within the internal chamber. Within the internal chamber, the device also has a plurality of piezoelectric charge conversion elements positioned along the internal wall. The plurality of piezoelectric charge conversion elements are positioned side-by-side to contact the movable element when the movable element moves within the internal chamber. In addition, the movable element is configured to simultaneously contact at least two of the plurality of side-by-side piezoelectric charge conversion elements. During use, the movable element is freely movable within the internal chamber in response to movement of the entire housing.

Abstract: A piezoelectric ceramic base body that has a polyhedral shape having shape anisotropy, such as a rectangular parallelepiped shape, and which has opposed faces on which external electrodes are formed. The opposed faces have first sides and second sides. Between the first side and the second side of one of the opposed faces, a width dimension of the surface in a direction orthogonal to the first side and the second side is larger than a length dimension of each of the first and the second sides. The crystal axis is {100} oriented in a direction parallel to the first and the second sides, and a degree of orientation by a Lotgering method is 0.4 or more.

Abstract: A method is provided for fabricating piezoelectric plates. A sacrificial layer is formed overlying a growth substrate. A template layer, with openings exposing sacrificial layer surfaces, is formed over the sacrificial layer. An adhesion layer/first electrode stack is selectively deposited in the openings overlying the sacrificial layer surfaces, and a piezoelectric material formed in the openings overlying the stack. Then, a second electrode is formed overlying the piezoelectric material. Using the second electrode as a hardmask, the piezoelectric material is etched to form polygon-shaped structures, such as disks, attached to the sacrificial layer surfaces. After removing the template layer and annealing, the polygon-shaped structures are separated from the sacrificial layer. With the proper choice of growth substrate material, the annealing can be performed at a relatively high temperature.

Abstract: This invention prevents an adhesive portion between a piezoelectric element and a conducting member of a small vibrator from peeling off. In a vibrator, a conducting member includes at least one first adhesive portion adhered to an electrode, at least one second adhesive portion adhered to an elastic member, and a feed portion electrically connected to means for applying an external voltage. In the conducting member, a path length from the feed portion to the first adhesive portion is longer than a path length from the feed portion to the second adhesive portion.

Abstract: User feedback may be generated and user input received through a single semiconductor component integrated into the electronic device. The single semiconductor component may include a piezoelectric cantilever actuator integrated with a transistor, such as a thin-film transistor, such that the actuator is electrically isolated from the transistor but mechanically attached to the transistor. One manner of integration is to extend a piezoelectric thin film of the actuator into a gate electrode stack of the transistor. The cantilever actuator may be controlled to provide haptic feedback. Separate from, and possibly simultaneously with the control of the cantilever actuator, user input may be received through the transistor integrated with the cantilever actuator.

Abstract: A structural health management system may include a structural health management apparatus including a carbon nanotube element configured to generate an electrical output in response to a deformation of the carbon nanotube element, a piezoelectric element configured to actuate in response to an electrical voltage applied to the piezoelectric element, electrode elements coupled to the carbon nanotube element and the piezoelectric element, and a controller communicatively coupled to the structural health management apparatus, wherein the controller is configured to convert the electrical output into data representing a measurement value of a structural abnormality and to initiate application of the electrical voltage to the piezoelectric element to counter the structural abnormality upon the measurement value being equal to or greater than a predetermined threshold value.

Abstract: A robot includes a first arm unit and a second arm unit. The robot includes a first drive part provided within the first arm unit and rotating the first arm unit about a first axis, and a second drive part provided within the first arm unit and rotating the second arm unit about a second axis. At least one of the first drive part and the second drive part contains a piezoelectric body.

Abstract: According to an embodiment of the present disclosure, a generator using a flexible piezoelectric device comprises a tire with a hollow tube structure, a ring-shaped inner wall formed on an inner surface of the tire, a supporting frame connecting a center of the tire with in inner surface of the tire to support the inner wall, and a flexible piezoelectric device fastened or mounted on an overall outer surface of the inner wall. The flexible piezoelectric device is pressurized to generate electricity as the tire is compressed by contact with the ground and at space between the inner wall and the inner surface of the tire is thus reduced.

Abstract: An ultrasonic wave generating device includes: an ultrasonic transducer; and a variable pulse generating device which generates and outputs an electric pulse. The ultrasonic transducer comprises a piezoelectric element which receives electric pulse from the electric pulse generating device and vibrates, and a memory which stores characteristic information of the ultrasonic transducer.

Abstract: An electric motor device includes a rotor, a stator, and electrical means for driving rotation of the rotor relative to the stator, the device being characterized in that the stator includes a substantially spherical cavity receiving the rotor, which is itself substantially spherical, and in that the electrical means are arranged to drive the rotor in rotation about at least two axes.

Abstract: A piezoelectric actuator includes a piezoelectric element, a vibrating plate configured to vibrate according to application of a signal to the piezoelectric element, and a driven body driven by the vibration of the vibrating plate. The vibrating plate vibrates in a first mode according to a signal having a first frequency, vibrates in a second mode according to a signal having a second frequency, and vibrates in a third mode according to a signal having a third frequency. The first frequency and the second frequency are different. The first frequency and the third frequency are different.

Abstract: The present invention provides a surface acoustic wave sensor capable of suitably controlling the flow of a liquid sample onto IDT electrodes. A surface acoustic wave sensor 1 has a piezoelectric substrate, a first IDT electrode and a second IDT electrode which are located on the upper surface of the piezoelectric substrate and are separated from each other while sandwiching a detection part (detection region) on the piezoelectric substrate there between, and the cover which forms the space being on the first IDT electrode, second IDT electrode, and detection part and straddling them. On the lower surface of the cover, the detection part-facing surface (lower surface of the film) facing the detection part has a smaller contact angle to the liquid sample than that of a pair of electrode-facing surfaces (lower surface of the cover body) facing the first IDT electrode and second IDT electrode.