This page is updated frequently with new Resonance Frequency-related patent applications.
| Moldable heater with miniature resonant frequency vibration generator for ophthalmic eyelid therapy|
A combined eyelid warming device, resonance frequency generator, coupling device, and tissue response sensor are disclosed in the field of use in dry eye treatment. These combined devices are used to ensure that the entire eyelid surface and periorbital structures receive defined therapeutic warmth and appropriately tuned harmonic resonance frequency for a required period of time to stimulate flow from the meibomian glands.
Eyedetec Medical, Inc.
|Piezoelectric drive device and robot|
A piezoelectric drive device includes a plurality of piezoelectric vibrating portions that drive a driven member. A difference between the maximum resonance frequency and the minimum resonance frequency in each resonance frequency of the plurality of piezoelectric vibrating portions falls within a range of 0.001% to 5% of an average resonance frequency of the plurality of piezoelectric vibrating portions..
Seiko Epson Corporation
|Power amplification circuit and transmitter|
Embodiments for a power amplifier that can increase a low-frequency resonance frequency are provided. The power amplifier includes a power amplifying transistor die, a first metal oxide semiconductor capacitor, a direct current decoupling capacitor, and an output matching network, where: a drain of the power amplifying transistor die is connected to a first end of the first metal oxide semiconductor capacitor by using a bonding wire, and a second end of the first metal oxide semiconductor capacitor is grounded; the drain of the power amplifying transistor die is directly connected to the output matching network by using a bonding wire; a source of the power amplifying transistor die is grounded; the first end of the first metal oxide semiconductor capacitor is connected to one end of the direct current decoupling capacitor by using a bonding wire; and the other end of the direct current decoupling capacitor is grounded..
Huawei Technologies Co., Ltd.
|Dc-ac power converting circuit|
A direct current (dc)-alternating current (ac) power convertor is disclosed. The dc-ac power converting circuit may include an inverter configured to convert the dc power into first output power, a piezoelectric transforming unit including piezoelectric transformers connected in parallel to an output terminal of the inverter, and each piezoelectric transformer of the piezoelectric transformers configured to transform the first output power to second output power, and an output configured to add the second output power output from the each of the piezoelectric transformer and to output ac power, wherein each piezoelectric transformer has a resonance frequency..
Samsung Electro-mechanics Co., Ltd.
|Servo control apparatus having function of displaying adjustment state in online automatic adjustment to control system|
A servo control apparatus according to the present invention includes a speed command generator; a torque command generator; a speed detector; a speed control loop; a speed control loop gain setting unit; at least one filter for filtering a specific band of a torque command value; a sinusoidal disturbance input unit for performing a sinusoidal sweep on the speed control loop; a frequency characteristics calculator for estimating the gain and phase of speed control loop input and output signals; a resonance frequency detector; a filter adjuster for adjusting the filter in accordance with a resonance frequency; a gain adjuster; a sequence controller for online and automatically performing the detection of the resonance frequency, the adjustment of the speed control loop gain, and the adjustment of the filter; and an adjustment state display unit. The adjustment state display unit displays a stage and progress in the adjustment by the sequence controller..
|Optically detected magnetic resonance imaging with an electromagnetic field resonator|
Measuring a sample includes providing a magnetic field at the sample using an electromagnetic field resonator. The electromagnetic field resonator includes two or more resonant structures at least partially contained within dielectric material of a substrate, at least a first resonant structure configured to provide the magnetic field at the sample positioned in proximity to the first resonant structure.
President And Fellows Of Harvard College
|Method and a system for protecting a resonant linear compressor|
A method for protecting a resonant linear compressor (14) including structural resonance frequencies (we) and a motor that is fed by feed voltage (va) that has amplitude (a) and a drive frequency (wa), both controlled according to the equation a.sin(wt). The protection method is configured so as to include the step of preventing feed to the motor at drive frequencies (wa) that have at least one harmonic coinciding tithe the structural resonance frequency (we) of the resonant linear compressor (14).
|Bioresonance frequency emitting device, system, and method|
A phototherapy or brt process and apparatus is provided, which, using a pre-recorded bioresonance frequency or compilation of frequencies, causes an emr emitter to emit within a biological window of a target organism to positively or negatively affect the organism. The emr may be generated in one or more leds by a device connected to a controller of the emr emitter which device provides the pre-recorded bioresonance frequency or compilation of frequencies to control the leds' emitted light in terms of its intensity and/or a frequency or flicker-rate..
Wave Force Electronics Inc.
|Resonant type transmission power supply device and resonant type transmission power supply system|
A resonant type transmission power supply device includes a pulse input circuit that inputs a pulse voltage to a transmission antenna at set intervals, a variable resonance frequency circuit that causes the resonance frequency of the transmission antenna to be variable and performs sweep detection of the resonance frequency when a pulse voltage is inputted, a frequency characteristic detecting circuit that detects a frequency characteristic of the transmission antenna when the sweep detection is performed, a foreign object detecting circuit that detects the presence or absence of a foreign object in an electromagnetic field generated from the transmission antenna on the basis of a detection result acquired by the frequency characteristic detecting circuit, and a power control circuit that reduces or stops the supply of electric power to the transmission antenna when a foreign object is detected.. .
Mitsubishi Electric Engineering Company, Limited
|Electric power steering control device|
Filters output a vibration-suppression gain for suppressing resonance of a sub frame or shimmy by performing a filter processing on a rotational angle of a motor. The filters have respective frequency characteristics that a gain becomes a maximum magnitude and a phase advances by 90° at a cut-off angle frequency.
Mazda Motor Corporation
Induction hob and operating an induction hob
The invention relates to an induction hob comprising at least two induction heaters (2, 3), each induction heater (2, 3) associated with at least one induction coil (4, 5), wherein a first induction heater (2) is associated with a first type of electronic driving means (6) comprising a first induction coil (4) and being adapted for driving an ac current through said first induction coil (4) of the first induction heater (2), wherein the second induction heater (3) is associated with a second type of electronic driving means (7) comprising a second induction coil (5) and being adapted for driving an ac current through said second induction coil (5) of the second induction heater (3) and wherein the electronic driving means (6, 7) are adapted to control the output power of the induction heaters (2, 3) by varying the frequency of the ac current through the respective induction coil (4, 5). Each electronic driving means (6, 7) is adapted to cause a constant electric power flow through the induction coil (4, 5) and the electronic driving means of the first and second type have different resonance frequencies such that the resonance frequency of the first type of electronic driving means (6) is at least 1.4 times higher than the resonance frequency of the second type of electronic driving means (7)..
Electrolux Appliances Aktiebolag
Magnetic memory element and memory device
According to one embodiment, a magnetic memory element includes a stacked structure. The stacked structure includes a first and a second stacked member.
Kabushiki Kaisha Toshiba
Single stylus for use with multiple inking technologies
Particular embodiments described herein provide for a stylus that includes a body, a plurality of conductive traces, a resonance circuit, and a tip, wherein the tip can be used to interact with both an electromagnetic resonance touchscreen and a capacitive touchscreen. The conductive traces can be spaced such that the conductive traces do not substantially block a resonance frequency of the resonance circuit..
System for positioning an object in lithography
A lithographic apparatus includes: an object that is moveable in at least one direction; a control system to move the object in the at least one direction, wherein the control system is arranged to control movement of the object in the at least one direction in a frequency range of interest; and a conduit provided with a fluid, wherein the conduit is arranged on or in the object in a pattern, and wherein the pattern is such that an acceleration of the object in the at least one direction causes an acceleration pressure profile in the fluid along the conduit, the acceleration pressure profile not matching with a resonance pressure profile that corresponds to a standing wave mode in the fluid with a resonance frequency in the frequency range of interest.. .
Asml Netherlands B.v.
A piezoelectric blower (100) includes a housing (17), a vibrating plate (41), and a piezoelectric element (42). The vibrating plate (41) forms a column-shaped blower chamber (31) together with the housing (17).
Murata Manufacturing Co., Ltd.
Controlled large signal capacitor and inductor
An electrical resonance network comprising a first capacitor and a first inductor whose resonance frequency can be tuned by means of a second capacitor and/or a second inductor. The resulting effective capacitor- or inductor value of a network period is controlled by a variable coupling respectively decoupling interval by means of at least one coupling switch.
Injection molded noise abatement assembly and deployment system
Acoustic resonators are formed by injection molding or other process that allows the shape, size, orientation, and arrangement of each resonator to be customized. Customizing the features of the resonators allows their resonance frequency to be adjusted based on their intended deployment.
Board Of Regents, The University Of Texas System
Vehicle door handle driving device and vehicle communication apparatus
A vehicle door handle driving device connected to an antenna and a dc driving detection member capable of detecting approach or touch of a person, which are connected in parallel, through first and second connection wires, wherein the first connection wire is constantly connected to a first positive dc power supply, and the second connection wire is connected to a ground for a period during which the antenna is not driven, the vehicle door handle driving device includes: a booster capacitor whose one terminal is connected to the first dc power supply; and an inverter connected to the other terminal of the booster capacitor, connected to a second positive dc power supply and the ground, generating an ac voltage having a resonance frequency of the antenna, and outputting the generated ac voltage to the first and second connection wires.. .
Aisin Seiki Kabushiki Kaisha
According to one embodiment, a memory device includes a stacked structure and a controller. The stacked structure includes a first magnetic layer, a second magnetic layer stacked with the first magnetic layer, and a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer.
Kabushiki Kaisha Toshiba
Ir photodetector using metamaterial-based on an antireflection coating to match the impedance between air and sp resonator
Provided are an infrared photodetector and a method for manufacturing the same. The infrared photodetector includes a bottom contact layer, a light absorption layer stacked on the bottom contact layer, a top contact layer stacked on the light absorption layer, a metal layer stacked on the top contact layer to induce surface plasmon resonance and having a plurality of holes, and a dielectric layer stacked on the metal layer to satisfy an antireflection condition with respect to externally impinging light at a surface plasmon resonance frequency.
Korea Research Institute Of Standards And Science
Forging method and forging apparatus
A forging method is set in a shaping hole of a die body, and the forging material is pressed with a punch to perform plastic shaping of the forging material. Ultrasonic vibration having a vibration frequency is applied to the die body with a vibration applying apparatus during the plastic shaping of the forging material.
Showa Denko K.k.
Wireless strain sensing device
A wireless strain sensing device uses a plurality of wireless sensors to obtain individual local strain data on the spot (area) where the wireless sensor is disposed on a stress member using a specific frequency response that is scanned externally. The resonance frequency shifts accordance with the locally applied strain on the specific point of the stress member.
Innovative In Vivo Sensing, Llc
Method and controlling mismatch in a voltage controlled oscillator array
A method and system are provided for reducing mismatch between oscillators in an lc vco array. In an implementation, a method comprises measuring the mismatch between the driver strengths, by measuring the corresponding oscillation amplitudes, and a mismatch between the resonance frequency of each lc vco in the array of vcos, and adjusting each lc vco to reduce the measured amplitude and frequency mismatches.
Microsemi Storage Solutions (u.s.), Inc.
A tunable antenna includes an antenna element having a feed point at one end thereof, a feed line being connected to the feed point, and a switcher that switches the resonance frequency of the antenna element. The switcher is connected to the antenna element at a position that is at a distance other than (λm/4)×n from the one end towards another end of the antenna element, where λm represents the wavelength corresponding to any resonance frequency of the antenna element, and n is a positive, odd number..
A piezoelectric blower includes a valve, a housing, a vibrating plate, and a piezoelectric element. The vibrating plate forms, together with the housing, a column-shaped blower chamber such that the blower chamber is interposed therebetween in a thickness direction of the vibrating plate.
Murata Manufacturing Co., Ltd.
Device for detecting low-pressure state of tire
Provided is a device for detecting a low-pressure state of a predetermined tire, comprising an index value calculation unit, a resonance frequency calculation unit and a low-pressure detection unit. The index value calculation unit calculates a low-pressure index value from wheel speed information of front and rear tires, the low-pressure index value being obtained by comparing rotation speeds of the front and rear tires.
Sumitomo Rubber Industries, Ltd.
System and powering on-road electric vehicles via wireless power transfer
A system for wireless power transfer of on-road vehicles is provided herein. The system includes a plurality of base stations; a power transmission line located beneath a surface of a road having a plurality of segments, each segment having at least one pair of coils and at least one capacitor electrically connected via a switch to the coils in the segment; and at least one vehicle having at least one power receiving segment having at least two coils, connected to at least one capacitor, wherein the at least one vehicle further includes a communication transmitter configured to transmit a power requesting signal, wherein the coils of the power transmitting segment are configured to receive the power requesting signal; and wherein each of the base stations is further configured to feed a plurality of the power transmitting segments with current at a resonance frequency, responsive to the power requesting signal..
Electric Road Ltd.
Antenna and mobile terminal
An antenna-includes a first radiator and a first capacitor structure. A first end of the first radiator is electrically connected to a signal feed end of a printed circuit board by means of the first capacitor structure, and a second end of the first radiator is electrically connected to a ground end of the printed circuit board.
Huawei Device Co., Ltd.
Tunable microwave resonator for static dynamic nuclear polarization (dnp)
A tunable millimeter-wave (mmw) dnp probe head is disclosed that is compatible with efficient h/x/y/e− dnp in samples that may have volume large compared to λ03, where λ0 is the free-space wavelength at the frequency fe of the electron paramagnetic resonance (epr) when placed in an external polarizing field b0, where b0 is typically in the range of 6.5 t to 35 t, corresponding to fe in the range of 180-1000 ghz, and corresponding to proton resonance frequency fh in the range of 280 mhz to 1500 mhz. The probe head comprises a tune cavity of adjustable volume, a sample cavity that is large compared to the sample wavelength, a tapered conical feed transition filled with a high dielectric material at the small end, and a selectively reflective wall that is substantially reflective of electromagnetic radiation at fe but substantially transparent to electromagnetic radiation at fh..
Doty Scientific, Inc.
Microwave measurement of water fraction
Apparatus and methods are provided for finding indications of at least one of a water fraction, a hydrocarbon fraction, water conductivity, and water salinity of a fluid. The fluid is within a flow line that extends through a resonator.
Schlumberger Technology Corporaton
Hemispherical resonator gyro
A hemispherical resonator gyro includes: a vibration mode shape extractor to extract, based on sine and cosine wave signals corresponding to an actuator drive frequency and radial displacement of a hemispherical resonator, a vibration mode shape excited in the hemispherical resonator; a drive frequency corrector to cause, based on a resonance phase characteristic of the hemispherical resonator, the actuator drive frequency to match resonance frequency of the hemispherical resonator; a nodal quadrature vibration controller to generate, based on a vibration amplitude of a nodal quadrature vibration and azimuth orientation of wave antinode of a resonance mode, an actuator dc drive signal to suppress the nodal quadrature vibration; and a resonance controller to generate an actuator ac drive signal to control the vibration amplitude to be a constant value, and detect a rotational angle in an angle measurement axis direction from the azimuth orientation of wave antinode of the resonance mode.. .
Mitsubishi Electric Corporation
Piezoelectric actuators optimized for synthetic jet actuators
A synthetic jet actuator and a method for optimizing a synthetic jet actuator to meet operating requirements and physical constraints may include estimating dimension and a resonance frequency of an air cavity of the synthetic jet actuator, and using the estimated resonance frequency to the estimate dimensions of a piezoelectric actuator of the synthetic jet actuator. Individual simulations of the air cavity and piezoelectric actuator, and a coupled simulation may be performed using the estimated dimensions, and the dimensions may be revised and simulations re-executed to match the resonance frequencies of the air chamber and the piezoelectric actuator.
The Boeing Company
Mobile member of a turbomachine which comprises means for changing the resonance frequency of same
A rotor of an aircraft turbomachine having a main axis a, which includes modifying the critical speed of the rotor, depending on whether the rotational speed of the rotor is lower or higher than a predefined rotational speed, including a component that is capable of occupying a first state or a second state depending on whether the rotational speed of the rotor is lower or higher than the predefined rotational speed, each state of the component corresponding to a critical speed of the rotor, and driving the component to one or the other of the two states thereof, depending on the rotational speed of the rotor, wherein modifying the critical speed of the rotor further includes a component that engages with the drive means and is capable of being deformed elastically between one or the other of two stable forms, each of which corresponds to a state of the component.. .
Power supply converter
A power supply converter includes a power input circuit, which generates and outputs a first alternating current voltage; a transformer, which converts the first alternating current voltage into a second alternating current voltage; a power output circuit, which converts the second alternating current voltage into an output voltage, and outputs the output voltage; a resonant circuit and a correction circuit, which senses the first alternating current voltage to obtain a detection signal, and detects a value of a ringing signal in the detection signal, and sends a control signal to the power input circuit according to the value of the ringing signal, to adjust the frequency of the first alternating current voltage to be equal to the resonance frequency of the resonant circuit or be around the resonance frequency, so as to adjust the value of the ringing signal to reach a minimum value.. .
Huawei Technologies Co., Ltd.
Non-contact communication device and antenna resonance frequency control method
An antenna drive unit has: an oscillator capable of controlling an oscillating frequency; an output part for supplying high frequency signal obtained by the oscillator to an antenna resonance circuit; a controller for controlling the oscillating frequency of the oscillator and the antenna resonance frequency of the antenna resonance circuit; and a phase detector for detecting a phase of output current or output impedance of the output part, wherein the oscillating frequency of the oscillator is controlled by the controller according to an operation mode, and also, the resonance frequency of the antenna resonance circuit is controlled by the controller based on the phase of output current or output impedance of the output part detected by the phase detector.. .
Piezoelectric device and circuitry
The present disclosure provides a device having a circuit. The circuit includes at least one boost converter receiving power from an energy source, a square wave driver in series with the boost converter, an inductor in series with the square wave driver for converting a square wave to a sinusoidal wave, and a piezoelectric transducer in series with the inductor, the piezoelectric transducer connectable to a load.
Actuator and electric beauty appliance
An actuator includes a movable body including a cylindrical magnet portion, an immovable body including pole tooth faces and a coil, and a torsion coil spring supporting a movable body to the immovable body. The coil receives an alternating current of a frequency substantially equal to a resonance frequency of the movable body and excites the pole tooth faces to have alternately different polarities in the circumferential direction.
Mitsumi Electric Co., Ltd.
Method for determining the cell aggressiveness grade of cancer cells or of cancer stem cells
Method for determining, in vitro, the cell aggressiveness grade of cancer cells or for detecting cancer stem cells in a cell sample originating from a solid tissue suspected of being cancerous, includes: a) dissociating the cell cluster constituting the sample into a suspension of whole and viable isolated cells, b) macroscopically sorting the cells to obtain homogeneous subpopulations, c) calibrating at least one microwave electromagnetic sensor resonating at its own resonance frequency, d) presenting the dissociated and sorted cells to the calibrated sensor, e) interrogating the sensor and determining its new resonance frequency having received the cells, f) calculating the variation in overall dielectric permittivity of the cells according to the variation in working frequency, which constitutes the electromagnetic signature of the cells. The macroscopic sorting is without prior labelling and is based on the intrinsic properties of the cells.
A turbomachine airfoil element has an airfoil. The airfoil has an inboard end, an outboard end, a leading edge, a trailing edge, a pressure side, and a suction side.
United Technologies Corporation
A transmitter for transmitting a high-rate data transmission through direct excitation
One aspect is a circuit for tuning a resonance frequency of an electrically small antenna and directly exciting the electrically small antenna. The circuit includes a first source configured for providing a constant voltage.
Virginia Tech Intellectual Properties, Inc.
Variable thickness diaphragm for a wideband robust piezoelectric micromachined ultrasonic transducer (pmut)
A diaphragm for a piezoelectric micromachined ultrasonic transducer (pmut) is presented having resonance frequency and bandwidth characteristics which are decoupled from one another into independent variables. Portions of at least the piezoelectric material layer and backside electrode layer are removed in a selected pattern to form structures, such as ribs, in the diaphragm which retains stiffness while reducing overall mass.
The Regents Of The University Of California
Speaker impedance monitoring
A speaker impedance may be determined by monitoring a voltage and/or current of the speaker. The calculated impedance may be used to determine whether the mobile device containing the speaker is on- or off-ear.
Cirrus Logic, Inc.
Parallel rc circuit equalizers
Disclosed are apparatus and methodology for increasing the resonance frequency and useful frequency range of surface mount rc equalizer devices. The presently disclosed subject matter provides improved operational characteristics of generally known such rc equalizer devices by implementing a reverse geometry that relocates the internal termination points, as well as external termination points for such devices, along lateral portions of the assembled device.
Wireless power receiving device and apparatus including the same
A wireless power receiving device includes a first resonance circuit configured to have a first resonance frequency; a second resonance circuit configured to have a second resonance frequency lower than the first resonance frequency; and a rectifying circuit connected to the first resonance circuit and the second resonance circuit without a switch and configured to rectify power received through the first resonance circuit and the second resonance circuit.. .
Samsung Electro-mechanics Co., Ltd.
Compliance chambers for marine vibrators
A marine vibrator may include a containment housing, a sound radiating surface, and a compliance chamber. The compliance chamber may include a compliance chamber housing, a non-linear linkage assembly, and a low pressure chamber.
Pgs Geophysical As
Ultrasonic transducer and transdermal delivery system
A transdermal delivery system including a first passive portion containing a substance for delivery in a reservoir and a second active portion that includes an ultrasonic source. The ultrasonic source includes piezoelectric element(s) that receive electrical stimulation and move radially.
Actuated Medical, Inc.
Ladder-type elastic wave filter having series and parallel resonators
In a ladder-type elastic wave filter, a resonance frequency of a second parallel resonator is higher than that of a series resonator and lower than an antiresonance frequency of a series resonator. With this configuration, an attenuation pole is formed by the second parallel resonator at a frequency region lower than an attenuation pole formed by the series resonator in a frequency region higher than the passband of the ladder-type elastic wave filter..
Skyworks Panasonic Filter Solutions Japan Co., Ltd.
Acoustic ambient temperature and humidity sensing
Acoustic ambient temperature and humidity sensing based on determination of sound velocity is described, in addition to sensors, algorithms, devices, systems, and methods therefor. An exemplary embodiment employs sound velocity in the determination of ambient temperature and humidity.
Wireless power transmission and charging system, and resonance frequency control wireless power transmission and charging system
A wireless power transmission and charging system, and a communication method of the wireless power transmission and charging system are provided. In one embodiment, a resonance frequency control method of a wireless power transmitter may include: generating communication power used for communication in a plurality of target devices using a reference resonance frequency; transmitting communication power to the plurality of target devices; transmitting charging power to the plurality of target devices; and adjusting the reference resonance frequency based on a reflected wave of the charging power, the amount of power received by one or more of the target devices, the amount of the charging power, the transmission efficiency of the charging power, or any combination thereof..
Samsung Electronics Co., Ltd.
A time variant antenna for transmitting wideband signals
A circuit for tuning a resonance frequency of an electrically small antenna. The circuit includes a first source configured for providing a modulation signal, a second source configured for providing a periodic electrical signal, an antenna, and a tuning circuit configured for modulating a resonance frequency of the antenna in response to the modulation signal.
Virginia Tech Intellectual Properties, Inc.
Loop-shaped antenna and mobile terminal
A loop-shaped antenna is disposed in a mobile terminal, where the mobile terminal includes a metal back cover at least partially covers the loop-shaped antenna; the loop-shaped antenna includes a feeding matching circuit, a grounding circuit, and a radiation portion, where the radiation portion is connected between the feeding matching circuit and the grounding circuit, and the radiation portion is of a symmetrical loop-shaped structure; the grounding circuit includes a switch component and a inductor, where the switch component and the inductor are connected in parallel and between ground and the radiation portion; the feeding matching circuit includes a feeding end and a variable capacitor, where the variable capacitor is connected between the feeding end and the radiation portion; and the feeding matching circuit is configured to adjust impedance matching of the loop-shaped antenna, and the grounding circuit is configured to adjust a resonance frequency of the loop-shaped antenna.. .
Huawei Device Co., Ltd.
A resonator filter according to a first exemplary embodiment of the present invention includes: a cover formed with a first coupling hole; a housing connected to the cover to form an inner space and having a second coupling hole formed at a bottom of the inner space; a dielectric material mounted around the second coupling hole in the bottom of the inner space of the housing; a first rod inserted to the first coupling hole to be connected to the cover and pressing the dielectric material; and a second rod inserted to the second coupling hole to be connected to the housing to be close to the dielectric material and tuning a resonance frequency by controlling a separation distance from the first rod.. .
Electronics And Telecommunications Research Institute