|| List of recent Piezo-related patents
|Portable device for treating insect bites and the like|
A portable device for treating the bites or stings of insects and harmful creatures, comprising a monolithic containing body made in a single piece and defining an internal housing space, a piezoelectric element configured for producing a predetermined difference in electrical potential, and an actuating element operable by a user and associated with said piezoelectric element to impart to the piezoelectric element a predetermined state of stress/deformation; the actuating element, the piezoelectric element and the discharge area are aligned along the operating axis. The monolithic containing body presenting a bottom part developing along the operating axis below a guide and housing portion, the bottom part defining part of the internal housing space with an overall span orthogonal to the operating axis which is constantly smaller than an overall span of the internal housing space defined by the guide and housing portion..
|Electronic blood pressure meter|
A blood pressure meter includes an adjustment unit that adjusts a pressure in a cuff by controlling a piezoelectric pump that uses a piezoelectric vibrator to supply fluid to the cuff, a driving control unit that gradually changes a cuff pressure by performing driving control on the adjustment unit, a pressure detection unit that detects the cuff pressure, a blood pressure determination unit that determines a blood pressure value, a circumferential length detection unit that detects a circumferential length of the measurement area, a battery that supplies power to various units, and a decrease detection unit that detects a voltage decrease value for the battery during blood pressure measurement. Based on the circumferential length and the voltage decrease value detected in an initial inflation period when the blood pressure measurement is first started, a range of the voltage decrease value during blood pressure measurement carried out thereafter is estimated..
|Backing element and ultrasound probe including same|
The present disclosure in some embodiment provides a backing member for an ultrasonic probe that is disposed on a rear surface of a piezoelectric element constituting the ultrasonic probe to attenuate ultrasonic waves radiated from the rear surface of the piezoelectric element, the backing member including a mixture of a base member and a filler, wherein the base member is a polyurethane resin and the filler is manganese powder, whereby the backing member has appropriate sound absorption function and excellent dicing processability and provides an ultrasonic probe including the backing member.. .
|Enhanced detection sensitivity with piezoelectric microcantilever sensors|
A method for enhancing the detection sensitivity of a piezoelectric microcantilever sensor. The method may involve providing a piezoelectric microcantilever and inducing a change in the young's modulus during detection of a species of interest.
|Assembly for a device of a fiber web production line|
An apparatus having a rod or a blade (21) for a device of a fiber web production line, especially a rod-bed or a blade holder or holder assembly for a rod or a blade (21) of a device for coating or sizing a fiber web, particularly a paper or a board web, which assembly comprises a holder (25), in which the rod or the blade (21) is supported on the front side of the holder (25), and which assembly has loading means (24). The assembly further comprises sensors, in particular piezo sensors (10) located between the rod or the blade (21) and the loading means (24) for measuring the loading pressure of the rod or the blade (21) locally..
Provided is an acoustic generator which has a high sound pressure at ultrahigh frequencies and which can suppress occurrence of large peak dips. An acoustic generator includes a film, a frame member disposed on an outer peripheral edge of the film, a piezoelectric element disposed on the film and inside the frame member, and a resin layer filled inside the frame member so as to cover the piezoelectric element..
|Programmable high voltage energy saving system|
A programmable system includes a first level protection circuit comprised of discharge tube cr1/cr2 and piezoresistor mov1/mov2 in series; a second-level protection circuit comprised of the series arm of capacitor c1 and resistor r1 in parallel with a transient voltage suppression diode tvs1, and inductors l1/l2 connected to the ends of first level and second-level protection circuits respectively. A control circuit includes a pwm driver module and a scm.
|Method for manufacturing a fluid ejection device and fluid ejection device|
A method for manufacturing a fluid ejection device, comprising the steps of: providing a first semiconductor body having a membrane layer and a piezoelectric actuator which extends over the membrane layer; forming a cavity underneath the membrane layer to form a suspended membrane; providing a second semiconductor body; making, in the second semiconductor body, an inlet through hole configured to form a supply channel of the fluid ejection device; providing a third semiconductor body; forming a recess in the third semiconductor body; forming an outlet channel through the third semiconductor body to form an ejection nozzle of the fluid ejection device; coupling the first semiconductor body with the third semiconductor body and the first semiconductor body with the second semiconductor body in such a way that the piezoelectric actuator is completely housed in the first recess, and the second recess forms an internal chamber of the fluid ejection device.. .
|Liquid discharging device|
A liquid discharging device includes a pressure chamber made up of a space surrounded by a pair of side walls, a floor wall, and a ceiling wall; a substrate configured to make up at least one of the floor wall or ceiling wall; a liquid supplying unit configured to fill the pressure chamber with liquid; and an electrode having a pair of side walls made of piezoelectric elements, configured to apply voltage to the piezoelectric elements in order to shrink the volume of the pressure chamber by deforming the piezoelectric elements and to discharge liquid from the pressure chamber; wherein the tip side face portion of the piezoelectric element is restrained as to the substrate.. .
|Ink-jet recording apparatus|
To provide an ink jet recording apparatus in which the residual vibration of any ink can be prevented to avoid the spread of the ink at an opening portion and to perform the continuous discharge of the ink stably. An ink-jet recording apparatus includes a recording head including a pressure chamber and a nozzle, the pressure chamber containing ink, the nozzle communicating with the pressure chamber and having an opening portion formed therein to discharge the ink, a piezoelectric element forming part of the pressure chamber, and a driving signal producing section producing a driving signal to be input to the piezoelectric element to change the volume of the pressure chamber..
|Method of fabricating multi-band filer module|
A method of fabricating a multi-band filter module is provided. The method includes forming a film bulk acoustic resonator (fbar) on a piezoelectric substrate by forming a resonant part on the piezoelectric substrate and then an air gap recessed on a surface of the piezoelectric substrate and positioned under the resonant part; and forming a surface acoustic wave (saw) device on the piezoelectric substrate in which the steps of forming the fbar and the saw are concurrently performed..
|Semiconductor device and operating method thereof|
A substrate including a plurality of transistors, and a piezoelectric formed to be contacted with the substrate. The piezoelectric is formed heat-expendably in a direction parallel to a gate direction of the transistors..
|Flexure-enhancing system for improved power generation in a wind-powered piezoelectric system|
Improving wind-based piezoelectric power conversion is provided. For example, a piezoelectric element affixed to a vibratory member is provided.
|High temperature ultrasonic probe and pulse-echo probe mounting fixture for testing and blind alignment on steam pipes|
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.
|Layer composite comprising electroactive layers|
The invention relates to a multi-layer composite (2, 2.1, 2.2, 18) comprising at least two electroactive layers (4, 6) positioned between a first electrically conductive layer (12) and a second electrically conductive layer (14), wherein at least one electrically conductive sub-layer (8) is positioned between the at least two electroactive layers (4, 6), and wherein at least one of the at least two electroactive layers (4, 6) is a piezo layer (6), wherein at least one other of the at least two electroactive layers (4, 6) is a dielectric elastomer layer (4).. .
|Normally-off gallium nitride-based semiconductor devices|
A method includes forming a relaxed layer in a semiconductor device. The method also includes forming a tensile layer over the relaxed layer, where the tensile layer has tensile stress.
|Method for manufacturing a braking element with integrated sensor, in particular a brake pad, brake pad with integrated sensor, vehicle braking system and associated method|
A method in which at least one piezoceramic sensor, which converts every mechanical force to which it is subjected into an electrical signal and having a curie temperature higher than 200° c., is solidarized directly onto the surface of a metal support element of a vehicle braking element, which during use faces a vehicle element to be braked. While in contact with such a surface, an electrical circuit is implemented that picks up and eventually processes the electrical signal, the electrical circuit being connected with a connector integrated with the metal support element.
A power generator includes layered-polymer piezoelectric element that is arranged on an object to be a heat source and a vibration source, and that generates electric power according to vibration transmitted from the object; a first heat conductor containing a flexible material that is arranged on the object, and that conducts heat from the object. The power generator includes a second heat conductor that is arranged on the first heat conductor and the layered-polymer piezoelectric element, and that conducts heat from the first heat conductor.
|Semiconductor pressure sensor, pressure sensor apparatus, electronic equipment, and method of manufacturing semiconductor pressure sensor|
A semiconductor pressure sensor (720) includes a thin film piezoelectric element (701) which applies strain to a portion of a semiconductor substrate that corresponds to a thin region (402). The thin film piezoelectric element (701) is formed at a distance away from diffusion resistors (406, 408, 410, and 412) functioning as strain gauges and is extended to the proximity of a bonding pad (716a) connected to an upper electrode layer of the thin film piezoelectric element and a bonding pad (716f) connected to a lower electrode thereof.
|Cryocoolers with electronic cryostat flow controllers and related system and method|
A system includes a cryocooler configured to cool an object, a sensor configured to measure a temperature of the object, and a controller configured to generate an actuator drive signal to control the cryocooler based on at least one temperature measurement from the sensor. The cryocooler includes a heat exchanger and a needle configured to control flow of coolant gas through the heat exchanger.
|Multi-capillary in-line rheometer for mineral slurries|
A rheometer for measuring non-newtonian fluids is disclosed. The rheometer includes capillaries with piezometers therein, a pump, flow control valves, flow, density, and speed meters, and a controller.
|Ultrasound transducer device and ultrasound medical apparatus|
There is provided an ultrasound transducer device including a plurality of piezoelectric single-crystal plates that are stacked such that polarization components thereof are alternately inverted. The plurality of piezoelectric single-crystal plates are stacked such that directions thereof in which strain deformation in a direction orthogonal to a direction of voltage application from electrodes respectively interposed between the plurality of piezoelectric single-crystal plates becomes largest coincide with each other.
|Blood pressure measurement device and control method for blood pressure measurement device|
A blood pressure measurement device determines an amplitude and a frequency of a voltage applied to a piezoelectric pump, carries out control so that a voltage at the determined amplitude and frequency is applied to the piezoelectric pump, and calculates a blood pressure value based on a detected cuff pressure during inflation when the cuff pressure is increased by the piezoelectric pump. A control frequency at which a pump efficiency of the piezoelectric pump is maximum in the case where the fluid is supplied to the cuff at a required flow rate during inflation using a predetermined voltage as the voltage is determined, and first control that applies a voltage at the amplitude of the predetermined voltage and at the determined control frequency is carried out.
|Liquid ejecting head, liquid ejecting apparatus, piezoelectric element and ultrasonic sensor|
A liquid ejecting head includes a flow channel-forming substrate in which a pressure generating chamber that communicates with a nozzle opening is provided; and a piezoelectric element that includes a first electrode provided on one surface side of the flow channel-forming substrate corresponding to the pressure generating chamber, a piezoelectric layer provided on the first electrode, and a second electrode provided on the piezoelectric layer, in which the first electrode configures a separate electrode that is independent for each active portion that is a substantial driving portion of the piezoelectric element, the second electrode configures a common electrode shared with the active portion, the piezoelectric element extends up to the outer side of the pressure generating chamber in at least one end of the pressure generating chamber, and the piezoelectric element includes a weighting film provided to overlap to one end of the pressure generating chamber on the second electrode in a region extended up to the outer side of the pressure generating chamber, where (film thickness of weighting film×young's modulus)/(film thickness of piezoelectric layer×young's modulus) is in a range of 0.6 or higher and 1.2 or lower.. .
|Systems and methods for piezo-based haptic feedback|
Systems and methods for piezo-based haptic feedback are disclosed. For example, one described apparatus for piezo-based haptic feedback includes a polymer matrix, and a piezoelectric actuator at least partially embedded within the polymer matrix, the piezoelectric actuator configured to output a haptic effect..
|Piezoelectric materials and methods of property control|
Among other things, piezoelectric materials and methods of their manufacture are described; particularly methods of forming regions of varying crystal structure within a relaxor piezoelectric substrate. Such methods may including heating the piezoelectric substrate above the transition temperature and below the curie temperature such that a first phase transition occurs to a first crystal structure; rapidly cooling the piezoelectric substrate below the transition temperature at a cooling rate that is sufficiently high for the first crystal structure to persist; and applying an electric field through one or more selected regions of the piezoelectric substrate, such that within the one or more selected regions, a second phase transition occurs and results in a second crystal structure..
|Vibration generating apparatus|
There is provided a vibration generating apparatus including: a bracket having a circular plate shape; a vibration member having a lower edge portion of a central portion fixed to the bracket and having a closed curved line shape; a piezoelectric element fixed to a lower surface of the vibration member among inner surfaces of the vibration member and deformed when power is applied thereto; and a mass body fixed to the inner surfaces of the vibration member and disposed to face the piezoelectric element.. .
|Surface vibration using compliant mechanical amplifier|
A displacement amplifier receives an actuation displacement signal from a piezoelectric actuator. The displacement signal is amplified by one or more stages of compliant elements, and a corresponding force is applied to a load.
A bonding apparatus includes a bonding arm which has a receiving portion facing a center axis of a bonding tool; a pair of capillary holding portions in contact with the bonding tool; a pair of piezoelectric elements configured to generate an ultrasonic vibration in contact with the capillary holding portions; and a pressurizing device which has a pressurizing member arranged to face the receiving portion of the bonding arm and a moving device configured to move the pressurizing member toward the receiving portion of the bonding arm. The pressurizing member is moved in a state in which the pair of piezoelectric elements, the pair of capillary holding portions, and the bonding tool are placed between the receiving portion of the bonding arm to cause the bonding arm to hold the pair of capillary holding portion and the bonding tool..
|Apparatuses and methods for generating shock waves for use in the energy industry|
Several methods and devices are provided herein to generate shock waves that are used in the oil industry for well drilling, hydrocarbon or gas exploitation, fracking process or improved oil recovery (ior), enhanced oil recovery (eor), cleaning of process waters, oil spills byproducts and oil pipes, which can be used as independent systems or as auxiliary systems concomitantly with other existing technologies. The different devices consist of generating shock waves utilizing either one or more laser sources, or a self-generated combustible gas supply, or a micro-explosive pellet, or piezocrystals, or a piezofiber composite structure..
|Miniature robot having multiple legs using piezo legs having two degrees of freedom|
The present invention relates to a miniature robot using a plurality of piezo legs capable of deforming in two degrees of freedom by supplying input voltage signals, and an integrated artificial neural network behavior controller capable of modeling complex behavioral patterns and gait patterns by a simple structure. The miniature robot with multiple legs includes: a main body; a plurality of piezo legs constituted by bimorph piezoelectric elements and connected to the main body to generate motion through morphological deformation in two degrees of freedom by applied voltage signals, thereby resulting in movement on the ground; and a control part including an artificial neural network behavior controller, which controls motion patterns by feeding back information with respect to the environment transmitted from external sensors and to electrical signals transmitted when the piezo legs contact the surface of the ground, to control the voltage applied to each of the piezo legs..
|Automatic passive control of liquid positioning in microfluidic chips|
A device for controlling liquid motion includes a substrate (10) of material having piezoelectric properties, and a system for controlling the motion of a quantity of liquid placed in contact with the substrate. The control system includes at least one interdigitated transducer (t1, t3, t5, t7), applied to the substrate (10) and designed for selectively generating a surface acoustic wave adapted to propagate on the substrate (10) and interact with the quantity of liquid.
|Surface acoustic wave sensor|
A surface acoustic wave sensor of the invention includes: a piezo element that propagates a surface acoustic wave; an electrode that carries out conversion of an electrical signal and a surface acoustic wave; and a porous base member into which liquid infiltrates and which comes into contact with the piezo element.. .
|Dual channel accelerometer and method of manufacturing the same|
Each of the first piezoelectric elements and the second piezoelectric elements are interleaved with one another, and are co-located with the seismic mass, the co-located first and second piezoelectric elements and the seismic mass being fastened to the supporting base by a rigid mechanical coupling. The interleaved first and second piezoelectric elements provide an improved first output channel to second output channel matching..
|Energy harvesting cochlear implant|
The invention is related to a totally implantable cochlear implant having a transducer which is a piezoelectric vibration energy harvester to be mounted on the ossicular chain or the tympanic membrane to detect the frequency of oscillations and generate the required voltage to stimulate the relevant auditory nerves. The invention enables patients' continuous access to sound, since it eliminates the outside components of conventional cochlear implants.
A screen sounder includes a housing having a front case, a screen supported by the front case, a piezoelectric module mounted with the screen for driving the screen to generate sound or converting vibration of the screen into electric energy, an audio signal source electrically connecting to the piezoelectric module for driving the piezoelectric module to vibrate, a rechargeable module electrically connecting to the piezoelectric module for receiving the electric energy, and a switching control unit electrically connecting with the piezoelectric module for switching the electrical connections between the audio signal source, the rechargeable module and the piezoelectric module.. .
|Oct probe using pzt|
An optical coherence tomography (oct) probe using lead zirconate titanate (pzt). In the oct probe using pzt, a sine wave is induced from a vibrator made of a piezoelectric element, so that an image in which the scanning range is increased can be captured due to the vibration of the vibrator.
|Ring laser gyro|
A ring laser gyro with no piezoelectric elements for dither detection includes a laser beam receiving unit for receiving a laser beam taken out of a gyro block, a laser beam intensity measuring unit for measuring the intensity of the laser beam received by the laser beam receiving unit, a dither mechanism, a dither control unit for driving the dither mechanism, and a gyro case housing the gyro block, wherein the laser beam receiving unit is secured to the gyro case, the laser beam receiving unit has a laser beam receiving surface for receiving the laser beam from the gyro block to detect a laser beam receiving position on the laser beam receiving surface and output positional information indicating the laser beam receiving position. The dither control unit drives the dither mechanism on the basis of information indicating the amplitude of the laser beam receiving position obtained from the positional information..
|Full-parallax acousto-optic/electro-optic holographic video display|
A full-parallax acousto-optic/electro-optic holographic video display includes a control layer and a piezo-electric layer, which includes a substrate and an array of anisotropic waveguide elements. Each waveguide element guides light into a single polarization and includes a horizontal grating, which diffracts light horizontally and comprises surface acoustic waves, and vertical grating, which diffracts light vertically and includes an electro-optic phased array.
|Bicycle alarm with signaling siren and light|
A signaling and alarm device that is attachable, without using tools, to a bicycle or other conveyance using a flexible fixture and s-hook fastener. By way of two slide switches and one push-button switch located on the device housing, the device is able to achieve an alarm mode, an audible signaling mode, and a visual signaling mode.
|Resonating element, resonator, electronic device, electronic apparatus, moving vehicle and method of manufacturing resonating element|
A piezoelectric resonating element includes a piezoelectric substrate having a rectangular vibrating portion and a thick-walled portion, excitation electrodes and, and lead electrodes. The thick-walled portion includes a fourth thick-walled portion, a third thick-walled portion, a first thick-walled portion, and a second thick-walled portion.
|Piezoelectric generating with location signaling|
An apparatus including a piezoelectric convertor layer; at least one piezoresistive layer on the piezoelectric convertor layer; and electrical conductor outputs. The at least one piezoresistive layer includes a plurality of spaced apart piezoresistive electrodes.
|System for generating and distributing energy from piezoelectric materials|
The invention relates to a system that generates energy from piezoelectric materials, applied mainly to supplying energy in traffic systems. The invention reduces the costs associated with the implementation of the piezoelectric systems on roads or vehicle and pedestrian transit systems, since in some cases they are manufactured in modules.