|| List of recent Resonance Frequency-related patents
| Negative dielectric constant material based on ion conducting materials|
Metamaterials or artificial negative index materials (nims) have generated great attention due to their unique and exotic electromagnetic properties. One exemplary negative dielectric constant material, which is an essential key for creating the nims, was developed by doping ions into a polymer, a protonated poly (benzimidazole) (fbi).
| Electronic oscillation circuit|
An electronic oscillator circuit has a first oscillator, for supplying a first oscillation signal, a second oscillator, for supplying a second oscillation signal, a first controller for delivering the first control signal as a function of a phase difference between a first controller input and a second controller input of the first controller; a second controller for delivering the second control signal as a function of a phase difference between a first controller input of the second controller and a second controller input of the second controller; a resonator; at least a second resonance frequency, with a first phase shift dependent on the difference between the frequency of a second exciting signal and the second resonance frequency and processing means, for receiving the first oscillator signal and the second oscillator signal, determining their mutual proportion, looking up a frequency compensation factor in a prestored table and outputting a compensated oscillation signal.. .
| Composite micro-electro-mechanical-system apparatus and manufacturing method thereof|
A mems apparatus comprising composite vibrating unit and the manufacturing method thereof are disclosed. The vibrating unit includes a stiffness element on which a first material is disposed.
| Suspension system for in-wheel motor vehicle|
Included are an elastic support mechanism (10) and a shock absorber (11) in a suspension (3) interposed between an in-wheel motor device (1) and a vehicle body structure (2). The elastic support mechanism (10) can change a modulus of elasticity and the shock absorber (11) can change a damping force.
| Torque measuring system and a method thereof|
A torque measuring system is provided in a vehicle transmission including a clutch assembly having a two part, rotatable torque transmitting member, the two pans of the member being angularly movable relative to one another against the compression of at least one damper spring pack, and an actuator with a non rotatable cylinder for controlling the clutch. A device for radiating and receiving wave energy is arranged to irradiate the damper spring pack in order to receive a reflected modulation signal proportional to the current resonance frequency of the damper spring pack, and where the modulation signal is arranged to be converted to a torque value by a signal processing device, which torque value corresponds to the actual torque over the clutch..
|Receiving circuit, receiving device, and receiving method|
A receiving circuit includes: a mixing section configured to mix a local oscillation signal with a positioning signal that is received by an antenna within a constant receiving frequency band that includes a resonance frequency of the antenna, and output a mixed signal of the local oscillation signal and the positioning signal; and a control section configured to sequentially select any of a plurality of carrier frequency bands used in the positioning signal, and configured to switch the resonance frequency of the antenna to a specific frequency within the selected carrier frequency band, and switch a frequency of the local oscillation signal, based on the specific frequency and a frequency of the mixed signal.. .
|Enhanced inductive power and data transmission using hyper resonance|
A method of wirelessly transmitting power or data is disclosed. The method may include the step of providing a transmitter including a driver coil and a first transmitter resonator coil.
|Multi-frequency ultra wide bandwidth transducer|
Piezoelectric micromachined ultrasonic transducer (pmut) arrays and techniques for frequency shaping in pmut arrays are described, for example to achieve both high frequency and low frequency operation in a same device. The ability to operate at both high and low frequencies may be tuned during use of the device to adaptively adjust for optimal resolution at a particular penetration depth of interest.
|Magnetic memory element and nonvolatile memory device|
A magnetic memory element includes a first stacked unit and a second stacked unit. The first stacked unit includes a first ferromagnetic layer, a second ferromagnetic layer, and a first nonmagnetic layer.
An illustrative embodiment of a damper for use with rotary machinery may include a damper mass connected to an electronics housing via one or more piezo elements. The illustrative embodiment of the damper may include one or more electrical components wherein the electrical components, piezo elements, and/or damper mass may be tuned such that the damper is configured with an electrical resonance frequency corresponding to a mechanical resonance frequency present in a component of the rotary machinery.
|Lever mechanisms for anti-phase mode isolation in mems tuning-fork structures|
A mems resonator includes two resonating masses having an anti-phase and in-phase resonance mode, each mode having a resonance frequency, and an anti-phase resonance levering system coupled to the two resonating masses to stiffen and/or dampen the in-phase resonance mode while leaving the anti-phase resonance mode compliant. This effectively raises the in-phase resonance frequency above the anti-phase resonance frequency, and potentially creates a large frequency separation between the two resonance modes.
|Methods of controlling resonance frequencies in near field communication devices, near field communication devices and electronic systems having the same|
A method of controlling a resonance frequency of a near field communication (nfc) device that includes a resonance unit to transceive data through an electromagnetic wave and an nfc chip may comprise: detecting whether an nfc card or reader exists around the nfc device; when the nfc card is detected, setting a resonance frequency of the resonance unit as a first optimal frequency based on a magnitude of a voltage generated from the resonance unit while a carrier wave is radiated to the nfc card through the resonance unit; and/or when the nfc reader is detected, setting the resonance frequency of the resonance unit as a second optimal frequency based on the magnitude of the voltage generated from the resonance unit in response to the wave received from the nfc reader and/or a magnitude of an inner current generated from the nfc chip in response to the wave.. .
|Optical receiver and transceiver using the same|
An optical receiver is disclosed having a dielectric non-conductive substrate. A ground plane is positioned on the dielectric non-conductive substrate.
|Resonator element, resonator, and oscillator|
A resonator element includes: at least one resonating arm extending, wherein the resonating arm has a mechanical resonance frequency which is higher than a thermal relaxation frequency thereof, the resonating arm has a groove portion, the groove portion includes a bottom portion, a first side surface that extends along the longitudinal direction of the resonating arm and comes into contact with the opened principal surface and the bottom portion, and a second side surface that faces the first side surface with the bottom portion disposed therebetween and comes into contact with the opened principal surface and the bottom portion, and the groove portion has a non-electrode region which extends from a part of the first side surface close to the bottom portion to a part of the second side surface close to the bottom portion and in which no electrode is provided.. .
|Over-load protection of radio receivers|
A radio-powered apparatus (100) is protected from overloading in strong electromagnetic fields. The apparatus uses a resonant circuitry (120) to receive antenna signals at resonance frequency of the resonant circuitry and to obtain power from the received antenna signals.
|Wireless power transmitter, wireless power repeater and wireless power transmission method|
Disclosed is a wireless power transmitter which wirelessly transmits power through a wireless power repeater to a wireless power receiver using resonance. The wireless power transmitter includes a power supply unit for outputting ac power having a predetermined frequency, a transmission coil for receiving the ac power to generate a time-variable magnetic field, and a transmission resonant coil unit for transmitting power received from the transmission coil coupled with the transmission resonant coil, wherein the wireless power transmitter determines a resonance frequency for a power transmission while controlling a frequency of the ac power output from the power supply unit and a resonance frequency of the transmission resonant coil unit..
|Rf receiver with sideband symmetry circuit|
One aspect of the present invention includes an rf including a first mixer receiving an rf signal. A second mixer also receivers the rf signal.
|Vibration member driving circuit|
A vibration member driving circuit causes vibrations in a vibration member at least including an electro-mechanical energy conversion element and an elastic body by applying alternating voltage to the electro-mechanical energy conversion element fixed to the elastic body. The vibration member driving circuit includes an inductor and capacitor serially connected to the electro-mechanical energy conversion element.
|A capacitive contactless powering system|
A capacitive contactless powering system (100) comprises a pair of receiver electrodes (141, 142) connected to a load (150) through a first inductor (160), wherein the first inductor is coupled to the load to resonate the system; a pair of transmitter electrodes (121, 122) connected to a driver (110); an insulating layer (130) having a first side and a second side opposite each other, wherein the pair of transmitter electrodes are coupled to the first side of the insulating layer and the pair of receiver electrodes are decoupled from the second side of the insulating layer, such that a capacitive impedance is formed between the pair of transmitter electrodes and the pair of receiver electrodes, wherein a power signal generated by the driver is wirelessly transferred from the pair of transmitter electrodes to the pair of receiver electrodes to power the load when a frequency of the power signal matches a series-resonance frequency of the first inductor and the capacitive impedance.. .
|Marine seismic vibrators and methods of use|
Embodiments relate to marine seismic vibrators for use in seismic surveying and associated methods of use. An embodiment provides a marine seismic vibrator comprising: a shell having a spring constant selected to provide a first resonance frequency within an operational frequency range of about 1 hz and about 300 hz; a driver disposed within the shell and having a first end and a second end; and a spring element coupled to the shell between the first end and the second end of the driver, wherein the spring element has a second mode of oscillation that provides a second resonance frequency within the operational frequency range..
|Antennas with unique electronic signature|
Methods and apparatus are disclosed for manufacturing antennas with a unique signature and for identifying an antenna using its unique signature. An exemplary antenna comprises a radiating element and a ground element, between which a resistor-inductor-capacitor (rlc) circuit is connected.
|Multi-band antenna and terminal device|
An antenna that includes a first element extending from a connection point, and has a curvature such that a first tip end of the first element extends in a direction toward the connection point. A second element is connected to the connection point, and has a second tip end that extends in a direction away from the connection point, the second tip being disposed within an outer periphery of the first element.
|Wireless resonance coupled energy transmission|
In a further aspect of the present invention, a wireless power transmission link is suggested, which while substantially maintaining resonant coupling condition (resonance frequency of the source resonant circuit is substantially equal to the resonance frequency of the load resonance circuit) controlling the operating state of the wireless power transmission link such, that the coupling condition of wireless power transmission link is substantially limited to the critical coupling condition.. .
Provided is an rfid tag, wherein a communication distance of several centimeter or more can be secured and the cost of which can be reduced in comparison to conventional on-chip antennas, even when being compact in size (square shaped with a side of 1.9 to 13 mm). The rfid tag (80) comprises an antenna (20), an ic chip (30) connected to the antenna (20), and a sealing material (10) that seals the ic chip (30) and the antenna (20).
|Apparatus and methods for locking resonating frequency of a miniature system|
A resonance locking system for a pico-projector, the system comprising a resonance frequency sensor operative for sensing change in resonance frequency of a miniature mechanical device (10) including a moving mirror assembly having a driving frequency, by comparing a current resonance frequency to a reference; and a feedback loop changing at least one aspect of use of the miniature moving mirror assembly responsive to a current value of the resonance frequency measured by the sensor.. .
|Touch pen, electronic device for recognizing the touch pen, and method of operating the electronic device|
An electronic device includes an electromagnetic inductive type touch pen and a pen touch panel for recognizing the touch pen. The touch pen includes a hollow housing having a certain length, a coil body installed in the housing and including a coil wound a plurality of times and having a certain length, a magnetic body installed to be separated from the coil body with a certain interval and inducing the coil body to generate a certain resonance frequency, and a button unit installed to expose a part thereof to the outside of the housing and to be flowable and inducing a variance in the resonance frequency of the coil body by controlling an electric length of the coil wound around the coil body according to an operation of a user..
|Ladder-type elastic wave filter and antenna duplexer using same|
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..
|Amplifier and amplifying method|
An amplifier includes: an amplifying device configured to amplify an input signal; and a matching circuit coupled to the amplifying device, and including an impedance transformer and a parallel resonance circuit coupled to a wiring which spans from the impedance transformer to the amplifying device, wherein a circuit length of the impedance transformer is longer than one-fourth of wavelength of an electronic wave having a frequency which is substantially equal to a resonance frequency of the parallel resonance circuit.. .
|Piezo actuated fluid dispenser fluid characterization|
A technique, including a system and a method, for measuring a fluid property using a piezo-actuated fluid dispenser, is disclosed. The technique includes generating a pressure wave in a channel in the piezo-actuated fluid dispenser using a piezo element, detecting, using the piezo element, a residual pressure oscillation in the channel caused by the generating, obtaining a resonance frequency of the pressure oscillation, and determining, using the resonance frequency, the fluid property..
|Rfog with optical heterodyning for optical signal discrimination|
In one embodiment a system including a resonator fiber-optic gyroscope configured to measure rotation rate is provided. The resonator fiber-optic gyroscope includes a sensing resonator have a first resonance frequency for a first laser beam propagation direction and a second resonance frequency for a second laser beam propagation direction, an optical mixer coupled to an output of the sensing resonator and configured to mix an output of the sensing resonator with a reference laser, wherein the optical mixer outputs a beat signal, and a resonance tracking electronics coupled to the optical mixer.
|Method and apparatus providing wave division multiplexing optical communication system with active carrier hopping|
A wave division multiplexing (wdm) system is disclosed which accommodates shifts in the resonant frequency of optical modulators by using at least two carriers per optical communications channel and at least two resonant modulator circuits respectively associated with the carriers within each optical modulator. A first resonant modulator circuit resonates with a first carrier and a second resonates with a second carrier when there is a shift in resonance frequency of the at least two resonant optical modulator circuits.
A transformer sub-circuit for use in an electrically operated vehicle includes a bridge circuit which has at least four mosfets and capacitors connected in parallel with the mosfets, and an inductor connected to the bridge circuit for use as a primary side of a transformer. A control device or controller for the inverter is configured to cause switching of the mosfets in such a way that operation is performed at a frequency that is higher than the resonance frequency..
|Determining fracture length via resonance|
A system and method to determine a length of a fracture induced from a borehole are described. The method includes isolating a portion of the borehole, the portion of the borehole including an end of the fracture at the borehole wall, increasing fluid pressure in the portion of the borehole, deploying a low-frequency source in the portion of the borehole, and varying a frequency of the low-frequency source to generate resonance oscillations at a resonance frequency in the fracture.
|Inertially operated piezoelectric energy harvesting electronic circuitry|
An electrical energy harvesting device for harvesting electrical energy from a pulsed impact loading event. The device including: a piezoelectric element configured to be loaded and unloaded to a first load level by the pulsed impact loading event; and a first inductor coupled to the piezoelectric element configured to be loaded and unloaded to a second load level by the pulsed impact loading event, wherein the piezoelectric element and the first inductor together operate as a first inductor/capacitor (lc) resonant circuit having a first resonance frequency and wherein the loading of the first inductor lags in time the loading of the piezoelectric element..
|Pressure sensor using mems resonator|
A pressure sensor including: a mems resonator; a sweeping unit which sweeps a frequency of an excitation signal in a predetermined direction of sweeping, over a predetermined frequency range including a resonance frequency f0 of a vibrator in the mems resonator, while outputting the excitation signal to the mems resonator; an integrating unit which inputs a vibrating-state information signal as a characteristic amount indicative of a vibrating state of the vibrator from the mems resonator while the sweeping unit sweeps the frequency, integrates a plurality of the vibrating-state information signals at different frequencies of the excitation signal, and outputs the integrated value; and a conversion unit adapted to determine a pressure acting on the mems resonator, based on the integrated value.. .
|An acoustic ceiling for a capacitive power transfer system|
An acoustic ceiling tile (200) operating as a capacitive power transfer sys tem comprises a first layer (231) comprising a non-conductive material; at least a pair of receiver electrodes (220, 221) of the capacitive power transfer system configured on a first side of the first layer; a foam layer (240) having a side substantially covered with the first layer; and a load (210) connected to an inductor (212) and to the pair of receiver electrodes, wherein the load and the inductor are configured in a chamber formed between the first layer and the foam layer, wherein a power signal generated by a power driver is wirelessly transferred from a pair of transmitter electrodes to the pair of receiver electrodes (220, 221)to power the load when a frequency of the power signal substantially matches a series-resonance frequency of the inductor and a capacitive impedance created between the pair of receiver electrodes and the pair of transmitter electrodes.. .
|Method of designing semiconductor integrated circuit|
A method of designing a semiconductor integrated circuit, includes inserting, between a power supply voltage and a ground voltage, at least two types of capacitor cells which have a different ratio, the ratio being between an inverse number of a capacitance value of a capacitative element and a resistance value of an equivalent series resistance, such that an impedance between the power supply voltage and the ground voltage in a resonance frequency according to capacitances of the at least two types of capacitor cells and an external inductance, and an impedance between the power supply voltage and the ground voltage in a target frequency, are near respective desired values or less than or equal to the respective desired values.. .
|Antenna structure and wireless communication device using the same|
An antenna structure includes a feed portion, a ground portion, a first radiating body, a second radiating body and a third radiating body. The first radiating body is connected to the feed portion and configured to obtain a first resonance frequency band.
|Transparent capacitive wireless powering system|
A transparent capacitive powering system (200) is disclosed. The system comprises a pair of receiver electrodes (241, 242) connected to a load (250) through an inductor (260), wherein the inductor is coupled to the load to resonate the system; and a transparent infrastructure (220) having at least a first layer (130) of a non-conductive transparent material and a second layer (120) of a conductive transparent material coupled to each other, wherein the second layer is arranged to form a pair of transmitter electrodes (221, 222), wherein the pair of receiver electrodes are decoupled from the second layer, thereby forming a capacitive impedance between the pair of transmitter electrodes and the pair of receiver electrodes, wherein a power signal generated by a driver (210) is wirelessly transferred from the pair of transmitter electrodes to the pair of receiver electrodes to power the load when a frequency of the power signal substantially matches a series-resonance frequency of the first inductor and the capacitive impedance..
|Actuation system for a resonant linear compressor, method for actuating a resonant linear compressor, and resonant linear compressor|
An actuation system for a resonant linear compressor (50), applied to cooling systems, the latter being particularly designed to operate at the electromechanical frequency of said compressor (50), so that the system will be capable of raising the maximum power supplied by the linear actuator, in conditions of overload of said cooling system. Additionally, an actuation method for a resonant linear compressor (50) is disclosed, the operation steps of which enable one to actuate the equipment at the electromechanical resonance frequency, as well as to control the actuation thereof in over load conditions..
|Suspension structure of multi-functional type vibration actuator|
Provided is a multi-functional type vibration actuator capable of stabilizing a vibration characteristic and improving variation in a resonance frequency by matching vibration waveforms when increasing/reducing an input signal frequency, by using a frame-shaped suspension of a polygonal shape. A spring characteristic of the frame-shaped suspension may be improved by forming j-shaped structures which is formed by connecting an extension portion and an arc, on all corner portions of the frame-shaped suspension of the polygonal shape, whereby reducing variation in a vibration waveform and a resonance frequency when sensible vibration is generated..
|Wireless communication device, display apparatus, television receiver and method for adjusting resonance frequency|
In a wireless communication device having a sheet-like antenna 41 and a first and second covers 42, 43 covering the antenna 41, a dielectric first rib 42a that is in contact with the antenna 41 is provided on the antenna 41 side of the first cover 42. The method for adjusting a resonance frequency is as described below.
|Dual band antenna|
A dual-band antenna, disposed in a substrate, is provided. The dual-band antenna includes: a feeding part and a slot antenna.
|Position indicator and capacitor|
A position indicator includes a resonance circuit housed in a casing and having an inductance element and a capacitor variable in capacitance, such that the resonance circuit resonates at a predetermined frequency. The position indicator is electromagnetically coupled to a position detecting device.
|Power transmitting device, power receiving device, and non-contact charging method|
In a non-contact charging method, variable information with which a resonance frequency of a resonance circuit of an equipment device having maximum charging power as the power transmitting frequency, and a resonance frequency or a q value of a resonance circuit of a power receiving unit of an equipment device other than the equipment device having the maximum charging power as a resonance frequency or a q value for charging depending on each charging power, and transmits to each equipment device variable information corresponding to each equipment device.. .
|Monolithic energy harvesting system, apparatus, and method|
An energy harvesting device utilizing a monolithic, mesoscale, single-degree-of-freedom inertial based resonator in which the support structure, beam-spring, and proof mass are a single component without joints, bonds, or fasteners. Frequency tuning features include holes in the proof mass in which mass can be added to change the devices resonance frequency as well as levers which add curvature to the beam-spring system and adjust system stiffness.
|Wireless power converter utilized as a capacitive power transfer system|
A direct current (dc) to alternating current (ac) wireless converter apparatus (200) for supplying power to a load connected in a capacitive power transfer system. The apparatus comprises at least two connectors (201, 202) enabling a galvanic contact to at least two supply lines (211, 212) of a dc grid; a driver (203) coupled to the connectors (201, 202) and configured to generate an ac power signal from an input dc signal fed by the at least two connectors, wherein a frequency of the ac power signal substantially matches a series-resonance frequency of the capacitive power transfer system; and at least a pair of transmitter electrodes (204, 205) connected to an output of the driver..
|Method, apparatus and system for providing metering of acceleration|
Techniques and mechanisms to provide for metering acceleration. In an embodiment, a microelectromechanical accelerometer includes a magnet, a mass, and a first support beam portion and second support beam portion for suspension of the mass.
|Piezoresistive nems array network|
A sensor for detecting analytes, a method of making the sensor, and a method of using the sensor. In one embodiment, the present invention comprises at least one array comprising a plurality of resonators.
|Downhole fluid tracking with distributed acoustic sensing|
Various disclosed distributed acoustic sensing (das) based systems and methods include embodiments that process the das measurements to detect one or more contrasts in acoustic signatures associated with one or more fluids flowing along a tubing string, and determine positions of the one or more contrasts as a function of time. The detected contrasts may be changes in acoustic signatures arising from one or more of: turbulence, frictional noise, acoustic attenuation, acoustic coupling, resonance frequency, resonance damping, and active noise generation by entrained materials.
|Tunable impedance network|
A tunable impedance network and a method for tuning the tunable impedance network are disclosed. In one aspect, the tunable impedance network comprises a plurality of transformers connected in series.
|Angular velocity detecting device|
A high-performance angular rate detecting device is provided. A driving part including a drive frame and a coriolis frame is leviated by at least two fixing beams which share a fixed end and are extending in a direction orthogonal to a driving direction, thereby vibrating the driving part.
|Projection controlling method and mems projection apparatus|
A projection controlling method for controlling a mems scanning mirror to repeatedly scan an image light on a surface and form a projection image is provided. A resonance frequency of the mems scanning minor which swings around a first swing axis is detected and provided to a filter unit as a parameter of a filtering process.
|Nanostructure diffraction gratings for integrated spectroscopy and sensing|
The present disclosure pertains to metal or dielectric nanostructures of the subwavelength scale within the grating lines of optical diffraction gratings. The nanostructures have surface plasmon resonances or non-plasmon optical resonances.
|Resonant circuit with automated trimming capabilities|
According to an example embodiment, a device includes a resonant circuit configured and arranged to provide a peak current flow at a resonance frequency. A trimming circuit provides variable impedances to the resonant circuit and thereby changes the resonance frequency for the resonant circuit.
|Frequency altering brace for an electric motor|
A support brace for a motor enables altering the stiffness and reed critical frequency of a motor system without removal of the motor from a motor stand or support structure. The support brace includes a first flange configured to mount to an electrical motor housing, and a second flange configured to mount to a supporting fixture.
|Method for controlling a mechanical vibrating element|
A method for controlling a mechanical vibrating element driven by a driving means includes operating the driving means at an operation frequency for stimulating the vibrating element to oscillate at this frequency. The method also includes adjusting the operation frequency of the driving means for stimulating the vibration element at different frequencies and of determining a respective energy consumption of the driving means depending on the frequency at which the vibrating element oscillates.
|Bistable force and/or acceleration sensor|
A technique is provided for determining a force/acceleration acting on a proof mass of a bistable device. According to an aspect of the invention, the location of a boundary of one of the stable configurations of the device is monitored.
|Drive control method of electrostatic-type ultrasonic transducer, electrostatic-type ultrasonic transducer, ultrasonic speaker using electrostatic-type ultrasonic transducer, audio signal reproducing method, superdirectional acoustic system, and display|
A push-pull-type electrostatic-type ultrasonic transducer includes a first electrode having through holes, a second electrode having through holes each of which is paired with the corresponding through hole of the first electrode, and an oscillation film sandwiched between a pair of the first and second electrodes and having a conductive layer to which direct current bias voltage is applied. When a wavelength obtained from a resonance frequency at a mechanical oscillation resonance point of the oscillation film is λ, a thickness t of the respective fixed electrodes is (λ/4)·n or substantially (λ/4)·n (where λ: wavelength of ultrasonic wave, n: positive odd number).
|Power supplying apparatus and power charging apparatus|
There are provided a power supplying apparatus controlling voltage of a power factor correcting circuit according to a power state and a power charging apparatus controlling voltage of a power factor correcting circuit according to a charging state of a battery. The power supplying apparatus includes: a power factor correcting circuit switching input power to correct a power factor thereof and adjusting a voltage level of the power of which the power factor has been corrected according to a state of power transferred to a load; and a resonant dc to dc converting circuit having a resonance frequency varied according to a voltage level of dc power from the power factor correcting circuit and converting the dc power from the power factor correcting circuit into supply power having a preset level according to the resonance frequency..
|Wireless power transmission system capable of continuing power transmission while suppressing heatup of foreign objects|
A power transmitting antenna includes a first resonant circuit including a power transmitting coil, a power receiving antenna includes a second resonant circuit including a power receiving coil. When the power transmitting antenna and the power receiving antenna are electromagnetically coupled to each other, the power transmitting antenna and the power receiving antenna have an odd-mode resonance frequency corresponding to an odd-mode resonant condition, and an even-mode resonance frequency corresponding to an even-mode resonant condition, and the even-mode resonance frequency is higher than the odd-mode resonance frequency.
|Single-protein nanomechanical mass spectrometry in real time|
Methods and devices relating to measuring a landing position and mass of an analyte adsorbed to a nanomechanical resonator by resolving adsorbate-induced frequency shifts in at least two modes of a resonator resonance frequency, where during the resolving of the frequency shifts in the at least two modes analysis is so that the transformation (g) from the fractional-frequency shift pair to the analyte mass-position pair is one-to-one. Complex protein mixtures can be analyzed at high sensitivity and resolution..
|Image projection method and mems image projection apparatus|
An image projection method and a microelectromechanical system (mems) image projection apparatus are provided. The image projection method controls a mems scanning mirror swinging around a first swing axis to project an image light beam.
|Magnetic resonance imaging method and apparatus|
A magnetic resonance imaging (mri) method and apparatus are provided including a signal acquirer, a resonance frequency acquirer, and an rf driver. The signal acquirer is configured to acquire a free induction decay (fid) signal or an echo signal to generate a magnetic resonance image of a portion of an area of a subject.
|Capacitive wireless power inside a tube-shaped structure|
A capacitive powering system constructed to enable wireless power transfers inside a tube-shaped structure (200) includes a capacitive tube (220) including a pair of receiver electrodes (223, 224) connected to a load (221) through a first inductor (222), wherein the first inductor is coupled to the load to resonate the system; a transmitter device (210) including a pair of transmitter electrodes (213, 214) connected to a power driver(211);and an insulating layer (230) for electrically insulating the capacitive tube from the transmitter device to form a capacitive impedance between the pair of transmitter electrodes and the pair of receiver electrodes, wherein a power signal generated by the power driver is wirelessly transferred from the pair of transmitter electrodes to the pair of receiver electrodes to power the load when a frequency of the power signal substantially matches a series-resonance frequency of the first inductor and the capacitive impedance.. .
|Dynamic damper for vehicle|
A dynamic damper mounted within a vehicle is capable of tuning a resonance frequency for each direction and includes a housing formed by a vertical plate connected to a bottom plate. A first rubber having elasticity is seated on the bottom plate and a mass is seated on the first rubber in a vertical direction and is spaced apart from the vertical plate.