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7629726 |
Ultrasound system
An ultrasound system for providing megasonics and ultrasonics to a liquid at different frequencies and/or sweeping frequencies with associated generators, transducers, operations between resonance...
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7626315 |
Piezo-injector driving apparatus
A piezo-injector driving apparatus overcomes disadvantages occurring at the start and the end of charging or discharging of a piezoelectric element while maintaining high responsiveness. At the...
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7622845 |
Piezoelectric transducer signal processing circuit
A piezoelectric detector circuit has at least one input line, a piezoelectric transducer in the input line, an amplifier receiving signals on the input line and generating an output, and one or two...
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7618391 |
Waveform sensing and regulating fluid flow valve
Microfluidic shunt valves are disclosed having a deflectable element capable of being held in a closed position to occlude the passage of fluid between an inlet and outlet and, when not held in the...
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7608979 |
Driving device and driving system
Drive technology is provided which makes suitable low velocity driving and smooth changing of driving velocity possible and achieves reduced power consumption. In the driving device, the drive unit...
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7610089 |
Implantable strain sensor for medical diagnostics
Embodiments include strain sensor devices for detecting movement, morphological changes or other physical parameters within a patient's body tissue. Some embodiments are directed specifically to...
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7608980 |
Vibration control apparatus and method
A vibration control apparatus capable of efficiently generating vibrations of different orders using the same electrodes. A plurality of electrodes polarized to have desired polarities are formed...
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7608989 |
Compliant electroactive polymer transducers for sonic applications
Described herein are compliant electroactive polymer transducers for use in acoustic applications. A compliant electroactive polymer transducer includes a compliant electroactive polymer at least...
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7602100 |
Driving method and driving device for standing-wave-type ultrasonic actuator
The invention provides a driving method and driving device for a standing-wave-type ultrasonic actuator which can prevent falling of and eliminate unstable motion of a driven body during...
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7598654 |
Megasonic processing apparatus with frequency sweeping of thickness mode transducers
A megasonic processing apparatus and method has one or more piezoelectric transducers operating in thickness mode at fundamental resonant frequencies of at least 300 KHz. A generator powers the...
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7589454 |
Driving apparatus
A driving apparatus comprises: an electro-mechanical conversion element; a driving member that drives backwards and forwards in a straight line in response to extension and contraction of the...
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7586392 |
Dual path acoustic data coupling system and method
A data coupler includes first and second acoustic isolation transformers that develop first and second isolated output signals in response to first and second modulated input signals. A first and a...
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7586235 |
Matching circuit for megasonic transducer device
A method and apparatus for matching impedance magnitude and impedance phase for an acoustic-wave transducer load and an RF power source. The acoustic-wave transducer load has a load impedance...
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7579750 |
Ultrasonic motor
An ultrasonic motor includes a stator that includes a comb body with a plurality of circumferentially-arranged comb-like projections and a piezoelectric body integrally mounted on the comb body, a...
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7579749 |
Power supply device and image forming apparatus using the power supply device
A power supply device generates an output voltage by driving a piezoelectric transformer using a frequency signal. The power supply device includes a comparison unit configured to compare an output...
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7573180 |
Ultrasonic motor
The invention provides an ultrasonic motor including internal electrodes provided in an ultrasonic vibrator and disposed in regions where electrical charges of the same sign are generated in one...
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7573177 |
Active/passive distributed absorber for vibration and sound radiation control
The active/passive absorber for extended vibration and sound radiation control includes principally two layers. The first layer has a low stiffness per unit area which allows motion in the...
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7573179 |
Driving method of liquid drop ejecting head and liquid drop ejecting apparatus
Disclosed herein is a driving method of a liquid drop ejecting head in which an oscillatory wave is imparted to a liquid accommodated in a pressure chamber using an electromechanical transducer,...
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7569973 |
Method for driving piezoelectric element or optical modulator including piezoelectric element
Disclosed are a method for driving a piezoelectric element or an optical modulator including a piezoelectric element and a recorded medium recorded with a program for executing the same. In...
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7567012 |
Drive unit
A drive unit being characterized in that a movable object can be prevented from being tilted when the movable object is stopped using a restricting member. The drive unit comprises a piezoelectric...
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7564164 |
Drive circuit for piezoelectric pump and cooling system that uses this drive circuit
A piezoelectric element of the piezoelectric pump is driven by the output signal of an amplifier that takes as input a signal that is generated by a sine wave oscillator of the same frequency that...
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7564165 |
Actuating device having an integrated electronic control circuit
An actuating device including a load and an integrated electronic control circuit comprising a microcontroller and at least one passive component. The microcontroller performs the dual function of...
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7564163 |
Structural vibration damping device
Disclosed is a structural vibration damping device, which comprises a piezoelectric element adapted to be mounted on a structure, a shunt circuit inserted between two electrodes of the...
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7564166 |
Driving apparatus, lens driving apparatus and image pickup apparatus
A driving apparatus comprises an actuator, the actuator comprising an electromechanical conversion element and a driving shaft attached to the electromechanical conversion element, wherein the...
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7554243 |
Class DE driving amplifier for piezoelectric actuators
The invention relates to a method and device for driving a piezo-electric actuator. A driving voltage is coupled to the piezo-electric actuator by an inductive element coupled in series with the...
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7550897 |
Electronic drive system for a droplet spray generation device
An electronic drive system for a droplet spay generation device of the type having a droplet generator including a perforate membrane driven by a piezoelectric transducer, the electronic drive...
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7545076 |
System and method for tracking drive frequency of piezoelectric motor
A system and method for actively tracking a drive frequency of a piezoelectric motor is disclosed. A drive voltage can be applied at a drive frequency to an active piezoelectric element in the...
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7538473 |
Drive circuits and methods for ultrasonic piezoelectric actuators
A drive circuit for and method of driving a piezoelectric actuator utilizes an impedance coupled to the piezoelectric actuator, wherein the impedance and the piezoelectric actuator together form a...
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7528525 |
Damping and stabilization for linear motor stage
A system that facilitates damping of mechanical vibration associated with machinery that is subject to such mechanical vibration. The system comprises machinery with at least one moveable part and...
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7525234 |
Drive circuit for an injector arrangement
A drive circuit ( 20 a, 20 b ) for an injector arrangement having at least one piezoelectric injector ( 12 a, 12 b ) is described. The drive circuit comprises: a first charge storage means (C 2 )...
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7521838 |
Device for operating a piezo actuator
A first energy control unit has a pilot controller with an applied setpoint energy and outputs a pilot control signal, and a regulator outputting a regulator signal as a function of the setpoint...
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7518285 |
Starting-process controller for starting a piezomotor
A starting-process controller for starting a piezomotor, having a voltage-controlled oscillator, a power output stage, and a resonant converter. The oscillator generates the control signals...
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7514842 |
Multiplexer for a piezo ceramic identification device
Provided is a multiplexer for a biometric apparatus. The multiplexer includes a plurality of first conductors coupled to the first ends of piezo ceramic elements in corresponding rows and a...
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7514844 |
Acoustic data coupling system and method
A data coupler includes an acoustic isolation transformer operable to develop an isolated output signal in response to an input signal. A transmitter is coupled to the acoustic isolation...
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7514843 |
Piezoelectric actuator and device
A generally diamond-shaped detection electrode is formed in the approximate center of the piezoelectric element. The strain resulting from the bending secondary vibration mode in the vicinity of...
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7511403 |
High-powered actuators and actuating systems for extended range and precise positioning
A piezoelectric motor (PEM) is driven with loosely coupled inductors 24 and switching amplifier having a pulse width modulator 18 , gate driver circuit 21 and two pairs of power mosfets 210,...
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7508116 |
Method and apparatus for vibration machining with two independent axes
A vibration machining apparatus and method of use. The vibration machining apparatus includes a cutting tool and a motion stage coupled to one of the cutting tool or the workpiece to move the...
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7498716 |
Piezoelectric actuator, inspection method, and liquid eject apparatus
A piezoelectric actuator includes a piezoelectric vibrating plate including piezoelectric ceramics, an internal electrode formed on a first surface of the piezoelectric vibrating plate, a...
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7480109 |
Piezoelectrically driven optical lens module
The present invention provides a piezoelectrically driven optical lens module. The piezoelectrically driven optical lens module includes at least a lens body, a guiding rod for providing an axial...
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7474036 |
High-capacity ultrasonic composite oscillating device
The invention is intended to provide a high-capacity ultrasonic composite oscillating device that is sufficiently rigid as a composite oscillating body for various strong ultrasonic applications....
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7471029 |
Frequency-control-type piezo actuator driving circuit and method of driving the same
The present invention relates to a frequency-control-type piezo actuator driving circuit. The frequency-control-type piezo actuator driving circuit includes a piezo actuator that is driven by a...
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7468573 |
Method of providing tactile feedback
A method provides tactile feedback emulating a click like feedback provided by one or more low cost, thin piezoelectric devices ( 142 ) to an input device ( 110 ) of an electronic device ( 100 ),...
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7462974 |
Inertial driving actuator
An inertial driving actuator includes a fixing member, a moving element that is fixed to the fixing member and generates a small displacement by extension and contraction, an oscillation substrate...
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7455051 |
Control device for piezo actuators of fuel injection valves
A control device for piezo actuators of fuel injection valves includes a DC/DC up converter and an output stage configured as a SEPIC converter having a second transistor and a coupling capacitor...
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7456545 |
Method for determining the activation voltage of a piezoelectric actuator of an injector
A method for determining the activation voltage of a piezoelectric actuator of at least one injector which is used to inject a liquid volume under high pressure into a cavity, in particular into a...
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7439815 |
Method and apparatus for switching on an ultrasound oscillation system
In a method and a circuit arrangement for operating an ultrasound oscillation system, wherein an excitation voltage is applied to an ultrasound oscillation system comprising an ultrasound...
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7432630 |
High power-to-mass ratio actuator
A method for driving an actuator. The method includes applying an electrical potential across an electrostrictive material relative to a counterelectrode disposed within an electrolyte, thereby...
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7432635 |
Moving member driving device and lens barrel
A driving device in a lens barrel unit of a lens unit drives advancing/retreating of a lens frame holding a lens, and manual focusing. The lens frame is supported freely movably back and forth by...
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7432636 |
Driving device and optical instrument
A piezoelectric actuator having a frame portion includes a drive shaft for frictional engagement with an engageable barrel arm of a lens unit. First and second piezoelectric elements are supported...
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7429838 |
Control of a piezoelectric motor
A method for controlling a piezoelectric motor, such that control signals of the motor are periodic non-sinusoidal voltage signals.
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