This page is updated frequently with new Resonance Frequency-related patent applications.
|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
Beat detection and enhancement
A system encourages experimentation with audio frequency and speaker technologies while causing an inanimate figure to appear to dance. The system applies a bandpass filter to an incoming audio stream (e.g., in a low frequency bass band).
Antenna apparatus and wireless communication system
Disclosed is an antenna apparatus and a wireless communication system. According to one implementation, the antenna apparatus includes, a near field communication antenna and a cable that is connected to the near field communication antenna.
Mitsumi Electric Co., Ltd.
Parameter setting method and parameter setting positioning apparatus, and positioning apparatus provided with the parameter setting apparatus
A parameter setting apparatus includes a calculator calculating a first resonance frequency ωr1 of a structure composed of a table, a rotor of a drive motor, and an object and a second resonance frequency ωr2 of a structure composed of a stator of the drive motor and a base using equations given below, and a setter setting a frequency band to be removed for a first damping filter based on the calculated first resonance frequency ωr1 and setting a frequency band to be removed for a second damping filter based on the second resonance frequency ωr2.. .
Dmg Mori Co., Ltd.
A bezel abutting a peripheral edge of a display region of a liquid crystal panel having the display region on one surface, and a bl chassis holding the liquid crystal panel from the other surface side of the liquid crystal panel are fastened to each other by a plurality of fastening members to form a housing. Each of the fastening members is selected from a plurality of types of the fastening members having different electrical resistance values for each fastening location so that a resonance frequency of the housing does not coincide with a frequency of the electromagnetic wave noise radiated from the housing..
Sakai Display Products Corporation
Oscillator, electronic apparatus, and moving object
An oscillator includes a resonator element; an oscillation circuit which outputs an oscillation signal by oscillating the resonator element; and a temperature compensation circuit as a frequency control circuit which controls an oscillation frequency of the oscillation signal, wherein, if a resonance frequency of the resonator element is referred to as fr (mhz) and an equivalent series capacitance is referred to as c1 (ff), a relationship of c1≧0.00279×fr2−0.05684×fr+2.69481 is satisfied.. .
Seiko Epson Corporation
Parameter setting positioning apparatus and positioning apparatus
A positioning apparatus includes a parameter setter for setting control parameters used by the positioning apparatus. The parameter setter executes a resonance frequency detection processing to detect a resonance frequency which occurs when a movable rest having an object to be moved attached thereto is moved and an inertia estimation processing to estimate an inertia which acts on the movable rest when the movable rest having the object to be moved attached thereto is moved, and executes a processing of setting a frequency band to be removed by a notch filter and a speed gain used in a speed controller based on the detected resonance frequency and a processing of setting a processing a rapid feed time constant based on the estimated inertia..
Dmg Mori Co., Ltd.
Sensor, detecting magnetic substance, and image forming apparatus
The sensitivity of a sensor that detects the amount or density of magnetic substance is raised. The sensor includes an oscillation circuit, a differential transformer, and an amplification circuit.
Kyocera Document Solutions Inc.
Common mode filter
A common mode filter includes a first filter and a second filter formed by a magnetic coupling between primary coils and secondary coils, respectively, and connected in series. In the common mode filter, a resonance frequency f1 of the first filter and a resonance frequency f2 of the second filter are different from each other..
Samsung Electro-mechanics Co., Ltd.
Method and apparatus to change resonance frequency of an electronic device
An electronic device may include a motor to operate at a first frequency during a first time period and to operate at a second frequency during a second time period, and an accelerometer to obtain first data relating to operation of the motor at the first frequency and to obtain second data relating to operation of the motor at the second frequency. The electronic device may also include a processor to determine a desired resonant frequency of the motor based on the first data and the second data..
Power conversion device
The resonant inverter circuit includes two or more switch elements. A detector detects an output current of the switch elements.
Mitsubishi Electric Corporation
Unit current transformer device and magnetic induction power supplying device for linearly controlling output power by using the same
The present invention relates to a unit current transformer device and a magnetic induction power supplying device, and particularly to a magnetic induction power supply unit capable of linearly adjusting output power according to the number of unit current transformer devices configured to have a specific resonance frequency. To this end, the unit current transformer device includes a current transformer inducing secondary current from primary current flowing through a line in a magnetic induction manner and having a resonant frequency double or greater than that of the primary current, and a converting unit converting an output of the current transformer to dc power..
Tera Energy System Solution Co. Ltd
Pellicle aging estimation and particle removal from pellicle via acoustic waves
A pellicle is disposed over a lithography mask. An acoustic wave generator is placed over the pellicle.
Taiwan Semiconductor Manufacturing Company, Ltd.
Method of manufacturing rotor
A method of manufacturing a rotor according to the present invention includes: a process of stacking a plurality of electromagnetic steel plates on a jig 30 to fix the electromagnetic steel plates to the jig 30, and a process of inserting magnets 21 into a plurality of respective openings 11 included in a rotor core 10 in which the plurality of electromagnetic steel plates are stacked on one another. The magnets 21 are inserted into the respective openings 11 while a structure 80 including the rotor core 10 and the jig 30 is vibrated at a resonance frequency of the structure 80..
Toyota Jidosha Kabushiki Kaisha
Closed loop controller and fast scanning probe microscopy
A method of operating a metrology instrument includes generating relative motion between a probe and a sample at a scan frequency using an actuator. The method also includes detecting motion of the actuator using a position sensor that exhibits noise in the detected motion, and controlling the position of the actuator using a feedback loop and a feed forward algorithm.
Bruker Nano, Inc.
Mobile terminal charging device and vehicle equipped with same
A controller of a mobile terminal charging device compares a resonance frequency or a resonance voltage of each of a plurality of foreign object detection coils with a reference resonance frequency or a reference resonance voltage of each foreign object detection coil, stored in a memory, corresponding to a position of a charging coil. The controller performs a safety operation on the basis of a comparison result..
Panasonic Intellectual Property Management Co., Ltd.
Optical image scanning component and microscope device
An optical image scanning component is suitable to receive a light provided by a light source of a microscope device and comprises a first scanning unit and a second scanning unit. The first scanning unit comprises a first scanning mirror rotated along a first direction as axis at a first resonance frequency.
Air-spring compensation in a piston-type marine vibrator
Embodiments relate to the restriction of gas flow in a piston-type marine vibrator to compensate for air-spring effects. An embodiment provides marine vibrator comprising: a containment housing; a piston plate; a fixture coupled to the containment housing; a mechanical spring element coupled to the piston plate and to the fixture; a driver coupled to the piston plate and to the fixture; and a variable gas flow restrictor disposed in an interior volume of the marine vibrator, wherein the marine vibrator has a resonance frequency selectable based at least in part on the variable gas flow restrictor..
Pgs Geophysical As
Piston integrated variable mass load
Embodiments relate to relate to marine vibrators that incorporate one or more piston plates that act on the surrounding water to produce acoustic energy. An example marine vibrator may comprise: a containment housing; a piston plate; a fixture coupled to the containment housing; a mechanical spring element coupled to the piston plate and the fixture; a driver disposed in the marine vibrator, wherein the driver is coupled to the piston plate and the fixture; and a container coupled to the piston plate, wherein the container is configured to hold a variable mass load; wherein the marine vibrator has a resonance frequency selectable based at least in part on the variable mass load..
Pgs Geophysical As
Antenna device of electronic apparatus
An antenna device of an electronic apparatus, according to embodiments of the present invention, includes radiation patterns comprising: at least one open boundary; and a plurality of radiation sections having the open boundary placed and arranged therebetween, wherein the radiation pattern forms a resonant frequency in a first frequency band (hereinafter, referred to as “a first resonance frequency”) and at least one among the radiation sections can form a resonant frequency in a second frequency band (hereinafter, referred to as “a second resonant frequency band”) higher than the first resonant frequency. The antenna device of the electronic apparatus, according to the present invention, can be implemented through other various embodiments..
Samsung Electronics Co., Ltd
Bistable piezoelectric cantilever vibration energy generator based on spherical composite structure and partial separation of different layers
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.
Beijing University Of Technology
Temperature sensor using piezoelectric resonator and methods of measuring temperature
A method of measuring temperature includes positioning a piezoelectric resonator in an environment exhibiting the temperature to be measured, applying an input signal to the piezoelectric resonator to resonate the piezoelectric resonator, varying a frequency of the input signal over a range of input frequencies, determining the resonance frequency of the piezoelectric resonator, and determining the temperature of the environment by referencing the resonance frequency of the piezoelectric resonator. The resonance frequency of the piezoelectric resonator changes according to a change in the temperature of the environment and the resonance frequency of the piezoelectric resonator corresponds to the temperature of the environment..
California Institute Of Technology
Antenna and mobile terminal
An antenna, including a first radiation part, a matching circuit, and a feed source, where the first radiation part includes a first radiator, a second radiator, and a capacitor structure, a first end of the first radiator is connected to the feed source using the matching circuit, the feed source is connected to a grounding part, a second end of the first radiator is connected to a first end of the second radiator using the capacitor structure, a second end of the second radiator is connected to the grounding part, the first radiation part is configured to generate a first resonance frequency, and a length of the second radiator is one-eighth of a wavelength corresponding to the first resonance frequency which helps to reduce an antenna length, and a volume of a mobile terminal.. .
Huawei Device Co., Ltd.
Magnetic resonance imaging apparatus
In one embodiment, an mri apparatus includes a gradient generation circuit configured to apply a gradient pulse according to a pulse sequence in which application of an rf pulse and application of the gradient pulse are included; and an rf transmission circuit configured to (a) perform modulation on a controlled output waveform of the rf pulse in such a manner that the controlled output waveform of the rf pulse follows time variation of a magnetic resonance frequency caused by time variation of an eddy-current magnetic field estimated from a waveform of the gradient pulse and (b) apply the rf pulse subjected to the modulation to an object.. .
Toshiba Medical Systems Corporation
Vibration sensor and pulse sensor
A bpf connected to a pulse wave generator has a bandwidth encompassing the fluctuation range of the resonance frequency of a helical antenna. As a result, even if the resonance frequency of the helical antenna fluctuates by a human body approaching the helical antenna, one or a number of a plurality of frequencies of signals passing through the bpf can pass through the bandwidth of the helical antenna..
Kyushu Institute Of Technology
Resonant inverter and switching power source unit
A resonance inverter includes a first coil provided between an input terminal and a switch element, a first capacitor provided between the drain and the source of the switch element, a second capacitor serially connected between the drain and the source of the switch element, and a second coil. A drain-source voltage of a switch element can be effectively lowered, by setting a serial resonance frequency based on the second coil and the second capacitor to a value higher than twice of a driving frequency, and lower than 2.75 times thereof..
Mobile-terminal charging device and vehicle provided with same
In a mobile-terminal charging device, a controller performs a safety operation in a case where a resonance frequency detected by a foreign object detection coil corresponding to a location where a charging coil is present is higher than a reference resonance frequency stored in a memory, or a resonance voltage detected by a foreign object detection coil corresponding to a location where the charging coil is present is lower than a reference resonance voltage stored in the memory.. .
Panasonic Intellectual Property Management Co., Ltd.