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Resonance Frequency patents



      
           
This page is updated frequently with new Resonance Frequency-related patent applications. Subscribe to the Resonance Frequency RSS feed to automatically get the update: related Resonance RSS feeds. RSS updates for this page: Resonance Frequency RSS RSS


Electronic device and method of operating the same

Samsung Electronics

Electronic device and method of operating the same

Microwave frequency setting device, microwave frequency setting method, and recording medium

Advantest

Microwave frequency setting device, microwave frequency setting method, and recording medium

Microwave frequency setting device, microwave frequency setting method, and recording medium

Sicpa Holding Sa

Method and system for authenticating a device

Date/App# patent app List of recent Resonance Frequency-related patents
02/26/15
20150057653
 Medical wireless power supply system patent thumbnailnew patent Medical wireless power supply system
A medical wireless power supply system includes a trocar, a power transmission coil provided in a state in which at least a part thereof is covered with a nonconductive member, a power transmission coil unit including the power transmission coil and configured to be capable of resonating at a predetermined resonance frequency, a medical instrument including a cylindrical insertion portion insertable into an insertion hole of the trocar, a power reception coil provided in a state in which at least a part thereof is covered with a nonconductive member on an inside of the insertion portion, and a power reception coil unit including the power reception coil and configured to be capable of resonating at a resonance frequency that coincides with the predetermined resonance frequency.. .
Olympus Corporation
02/26/15
20150054808
 Driving device, electronic device, and drive control program patent thumbnailnew patent Driving device, electronic device, and drive control program
A driving device includes a storage unit configured to store waveform data of driving signals whose phase is shifted by π/2 from a sinusoidal wave satisfying a frequency f1=m/n×f0 (m, n are natural numbers, and m≠n) where a resonance frequency of. An actuator is f0, wherein the; driving signals excite the actuator for an m number of times and stop exciting the actuator at a point other than a center point of amplitude; and a processor programmed to execute a process including reading the waveform data stored in the storage unit and outputting, to the actuator, the driving signals corresponding to the waveform data that has been read..
Fujitsu Limited
02/26/15
20150054770
 Driving device, electronic device, and drive control program patent thumbnailnew patent Driving device, electronic device, and drive control program
A driving device includes a storage unit configured to store waveform data of driving signals of a sinusoidal wave satisfying a frequency f1=m/n×f0 (m, n are natural numbers and m≠n) where a resonance frequency of an actuator is f0, wherein the driving signals excite the actuator for an m number of times; and a processor programmed to execute a process including reading the waveform data stored in the storage unit and outputting, to the actuator, the driving signals corresponding to the waveform data that has been read.. .
Fujitsu Limited
02/26/15
20150054769
 Driving device, electronic device, and drive control program patent thumbnailnew patent Driving device, electronic device, and drive control program
A driving device includes a storage unit configured to store waveform data of driving signals for stopping excitation of an actuator at a sinusoidal wave of a resonance frequency of the actuator, at portions other than a center point of an amplitude of the sinusoidal wave; and a processor programmed to execute a process including reading the waveform data stored in the storage unit and outputting, to the actuator, the driving signals corresponding to the waveform data that has been read.. .
Fujitsu Limited
02/26/15
20150054701
 Electronic device and  operating the same patent thumbnailnew patent Electronic device and operating the same
An electronic device including a processor and an antenna device is provided. The antenna device includes a power feeding unit, a first radiation section connected to the power feeding unit, and a switching element including a first terminal electrically connected to first portion of the first radiation section, and a second terminal electrically connected to a second portion of the first radiation section.
Samsung Electronics Co., Ltd.
02/26/15
20150054355
 System and  triggering power transfer across an inductive power coupling and non resonant transmission patent thumbnailnew patent System and triggering power transfer across an inductive power coupling and non resonant transmission
A triggerable power transmitter for power transmission from a primary coil to an inductively coupled secondary coil in a power receiver has a primary coil; a driver for electrically driving the primary coil; a front end receiving analog signal indicative of resonance properties of the primary coil and generating digital information in response to the analog signal; and a processor capable of: determining if said primary coil is coupled to a secondary coil based on the digital information, and triggering power from the primary coil to said secondary coil when said primary coil is inductively coupled to said secondary coil. The effective inductance of the primary coil increases reducing the resonance frequency when a secondary coil is inductively coupled to the primary coil.
Powermat Technologies Ltd.
02/26/15
20150053671
 Microwave frequency setting device, microwave frequency setting method, and recording medium patent thumbnailnew patent Microwave frequency setting device, microwave frequency setting method, and recording medium
According to a microwave frequency setting device, an additional signal source outputs an additional signal. An adder adds the additional signal to a microwave to output the microwave thus-obtained.
Advantest Corporation
02/26/15
20150053007
 Method and system for authenticating a device patent thumbnailnew patent Method and system for authenticating a device
Method for authenticating a timepiece comprising measuring acoustic vibrations emitted by said timepiece to obtain an electrical signal indicating magnitude information comprising a variation of a magnitude of the measured acoustic vibrations as a function of time. The electrical signal comprises at least one specific tone associated with the presence of a quartz resonator in the timepiece.
Sicpa Holding Sa
02/19/15
20150051817
 Drive control device and drive control  hybrid electric vehicle patent thumbnailDrive control device and drive control hybrid electric vehicle
A hybrid electric vehicle comprises an internal combustion engine and an electric motor/generator connected via a first clutch. In response to a system stop request in a vehicle stop state, a rotation speed of the internal combustion engine is decreased to a predetermined rotation speed higher than a predetermined resonance frequency band by a negative torque applied to the internal combustion engine from the electric motor/generator via the first clutch.
Nissan Motor Co., Ltd.
02/19/15
20150048893
 Resonator arrangement and  exciting a resonator patent thumbnailResonator arrangement and exciting a resonator
A method for exciting a resonator having a resonance frequency, the resonator is excited in a first period with a first frequency that differs from the resonance frequency by a first frequency difference is provided. During a second period, the resonator is excited with a second frequency that differs from the resonance frequency by a second frequency difference.
Siemens Aktiengesellschaft
02/12/15
20150042330

Determining the form of rf pulses for selective excitation in magnetic resonance imaging


Wherein m(lr,t) stands for a desired transversal magnetization after the selective excitation, t stands for a time, {right arrow over (r)} stands for a position vector and t stands for a duration of a pulse, and whereby s(t) stands for a magnetic resonance signal, v stands for a volume that is to be examined, t2 stands for a transversal relaxation time, and ωs stands for a shift of the resonance frequency. The invention also relates to a nuclear spin tomograph for carrying out the magnetic resonance method..
02/12/15
20150042171

Non-contact power transmission device drive method and non-contact power transmission device


A primary coil (l1) is excited by selectively using: a first resonance frequency (al) near a frequency determined by the primary coil (l1) and a primary-side capacitor (c), said primary coil (l1) being placed in a power-supply area (ar); and a second resonance frequency (bl) near a frequency determined by a secondary-side inductance component and a secondary-side capacitance component, said components existing when the primary coil (l1) faces a secondary coil (l2).. .
Panasonic Corporation
02/05/15
20150035526

Magnetic sensor including a lorentz force transducer driven at a frequency different from the resonance frequency, and driving a lorentz force transducer


A magnetic-field sensor, including: a die, a current generator in the die. The current generator generating a driving current.
Stmicroelectronics S.r.l.
02/05/15
20150034795

Pneumatic suspension and vibration isolation system employing low friction cable isolators


The present invention provides a suspension and vibration isolation system having cable isolators. The cable isolators employ low-friction air-bearing pneumatic cylinders and cables to isolate a suspended payload from vibrations of a carrier or to isolate the carrier from vibrations of the payload.
Vale S.a.
01/29/15
20150032046

Energy-based treatment methods for refractory gout


A method of performing a medical procedure is disclosed. The method includes: positioning an energy delivery device configured to deliver energy adjacent uric acid (ua) crystals having a resonance frequency; applying energy to tissue through the energy delivery device at a predetermined frequency thereby resonating the ua crystals; debulking at least a portion of the ua crystals; and removing at least a portion of the debulked ua crystals..
Covidien Lp
01/29/15
20150031315

Rf device and method with improved active load modulation capability


There is described an rf bidirectional communication device utilizing active load modulation, the device comprising (a) a resonance circuit including an antenna (326), and (b) a control unit (322) for controlling communication of the device, including switching between a transmission mode and a receiving mode, wherein the control unit is adapted to (c) modify a configuration of the resonance circuit such that the resonance circuit has a first resonance frequency (f0) when the device is in the transmission mode and a second resonance frequency (f0+Δf) when the device is in the receiving mode, and (d) modify the configuration of the resonance circuit such that a q-factor of the resonance circuit is periodically decreased while the device is in the transmission mode. There is also described a corresponding method and a system comprising a rf device and a reader/writer device.
Nxp B.v.
01/29/15
20150031313

Single differential-inductor vco with implicit common-mode resonance


A circuit for a single differential-inductor oscillator with common-mode resonance may include a tank circuit formed by coupling a first inductor with a pair of first capacitors; a cross-coupled transistor pair coupled to the tank circuit; and one or more second capacitors coupled to the tank circuit and the cross-coupled transistors. The single differential-inductor oscillator may be configured such that a common mode (cm) resonance frequency (fcm) associated with the single differential-inductor oscillator is at twice a differential resonance frequency (fd) associated with the single differential-inductor oscillator..
Broadcom Corporation
01/29/15
20150030169

Method of controlling sound reproduction of enclosure mounted loudspeakers


A method of controlling sound reproduction may include applying an audio signal to a voice coil of the electrodynamic loudspeaker to produce sound, detecting one of an impedance and admittance of the loudspeaker across a predetermined audio frequency range based on a detected voice coil current and voice coil voltage and determining a fundamental resonance frequency of the loudspeaker based on the detected impedance or admittance. The fundamental resonance frequency of the loudspeaker may be compared with a nominal fundamental resonance frequency of the loudspeaker representing a nominal acoustic operating condition of the loudspeaker.
Analog Devices A/s
01/29/15
20150030167

Method of detecting enclosure leakage of enclosure mounted loudspeakers


A method of detecting enclosure leakage of an electrodynamic loudspeaker mounted in an enclosure or box may include applying an audio signal to a voice coil of the electrodynamic loudspeaker through an output amplifier and detecting a voice coil current flowing into the voice coil. A voltage across the voice coil may be detected and an impedance or admittance of the loudspeaker across a predetermined audio frequency range may be detected based on the detected voice coil current and voice coil voltage.
Analog Devices A/s
01/29/15
20150028958

Differential oscillator


A differential oscillator includes a resonator, a differential amplifier circuit, and a filter. The filter is disposed in parallel to the resonator and the differential amplifier circuit.
Nihon Dempa Kogyo Co., Ltd.
01/29/15
20150027199

Circuit to extend frequency response of accelerometer


A compensation circuit connected to an accelerometer's output extends the frequency response of the accelerometer, while reducing noise produced by the accelerometer. The compensation circuit has a gain as a function of frequency that is (i) constant up to a first frequency that is less than the accelerometer's natural resonance frequency, and (ii) reduced to approximately zero at a second frequency that is greater than the accelerometer's natural resonance frequency..
01/22/15
20150023515

Earphone with noise reduction


The second diaphragm (13) attenuates acoustic signals entering the rear cavity (10) from ambient space (6) at frequencies above the resonance frequency and virtually increases the acoustic compliance of the rear cavity (10) at frequencies below the resonance frequency. The earphone (1, 201, 401, 601) thus behaves as an acoustically closed earphone at frequencies above the resonance frequency and as an acoustically open earphone at frequencies below the resonance frequency..
01/22/15
20150022411

Method and system for multiple feed point antennas


An antenna, including a radiating element configured to have a fundamental resonance frequency being regarded as a first harmonic resonance frequency fo, and feed points positioned on the configured radiating element at selected multiple locations that correspond to where a multiple of the first harmonic resonance frequency have current maxima, wherein feeds at the feed points cooperate at an operating frequency of the antenna to constructively combine their respective antenna radiation patterns.. .
Blackberry Limited
01/22/15
20150021483

Vibrating mirror element, distance measuring apparatus, and projector


A vibrating mirror element includes a drive control portion configured to control the driving of a correction drive portion to keep the turning angle velocity of a mirror portion substantially constant by oscillating the mirror portion about an axis at a non-resonance frequency in a direction opposite to a direction in which a resonant drive portion oscillates the mirror portion.. .
Funai Electric Co., Ltd.
01/15/15
20150016620

Transducer with motion control


An audio system comprises an electroacoustic transducer (1) with transducer connections (12, 13) to receive an audio signal (as) in the audio frequency range from a driver circuit (14) and measure means (11) to measure the excursion of a diaphragm (3) of the electro-acoustic transducer (1), wherein a sensor signal source (16) provides a sensor signal (ss) at the transducer connections (12, 13) with a sensor frequency beyond the audio frequency range and in the range of the resonance frequency of the electro-acoustic transducer and, wherein the measure means (11) comprise a sensor circuit (18) to sense changes of the impedance of the electro-acoustic transducer (1) for the sensor signal (ss) at the transducer connections (12, 13) caused by the excursion of the diaphragm (3) due to the audio signal (as).. .
Knowles Ipc (m) Sdn. Bhd.
01/15/15
20150015863

Radiation source and lithographic apparatus


The present invention provides a method of monitoring the operation of a radiation source fuel droplet stream generator comprising a fuel-containing capillary and a piezo-electric actuator (500). The method comprises analysing the resonance frequency spectrum of a system comprising the fuel-containing capillary and the piezo-electric actuator in particular to look for changes in the resonance frequencies of the acoustic system which may be indicative of a change in the properties of the system requiring investigation..
Asml Netherland B.v.
01/15/15
20150013462

Ultrasound diagnostic device and ultrasound probe


In order to reduce the variation of transmitting and receiving sensitivity among a plurality of cmut cells, an ultrasound diagnostic device comprises: a plurality of cmut cells each having a vibrating membrane that vibrates when ultrasound is transmitted to or received from a subject; an upper electrode and a lower electrode disposed facing each other on mutually opposite sides of each of the cmut cells to apply a bias voltage to each of the cmut cells by a bias power supply; and transmitting and receiving correction units for each correcting the voltage supplied from the bias power supply by using a function using at least one parameter of the thickness and resonance frequency of the vibrating membrane of each of the cmut cells.. .
Hitachi Aloka Medical, Ltd.
01/08/15
20150012230

Method of measuring micro- and nano-scale properties


This invention is a novel methodology for precision metrology, sensing, and actuation at the micro- and nano-scale. It is well-suited for micro- and nano-scale because it leverages off the electromechanical benefits of the scale.
01/08/15
20150011899

Device and monitoring variation of animal respiration and/or heartbeat


A method of monitoring variation in either or both respiration and heartbeat of an animal comprising the steps of vibrating a piezoelectric vibrator by continuously or intermittently applying an ac voltage of a frequency corresponding to a natural resonance frequency of the vibrator to the piezoelectric vibrator under such condition that the vibrator is placed directly or indirectly in contact with the surface of the animal's body; collecting a current generated by the vibrator under vibration; and calculating an impedance of the vibrator from a value of the current and a value of the ac voltage applied to the vibrator so as to continuously or intermittently detect variation of the impedance by lapse of time is effective to monitor variation of respiration and/or heartbeat of animals including humans who are in sleep or under exercise and take a variety of positions with high sensitivity.. .
Ueda Japan Radio Co., Ltd.
01/08/15
20150008755

Electric power receiving device and non-contact power supply system


In a non-contact power supply system, an electric power receiving device with suppressed heat generation is provided. The electric power receiving device is configured with a resonance circuit which includes a resonance capacity and a resonance coil acting as a receiving antenna, and receives electric power in a non-contact manner using resonant coupling of the resonance circuit.
Renesas Electronics Corporation
01/01/15
20150002166

Method for detecting foreign objects in an induction charging device


A method for detecting foreign objects in an induction charging device, with the aid of at least one control and/or regulating unit of the induction charging device, includes: ascertaining a resonance frequency; determining an actual quality at the resonance frequency; and comparing the actual quality to a setpoint quality which is a function of a resonance frequency.. .
Robert Bosch Gmbh
01/01/15
20150002148

Joint estimation of chemical shift and quantitative susceptibility map using mri signal


An example implementation of a method for mapping tissue magnetic susceptibility includes acquiring magnetic resonance (mr) images acquired at multiple echo times, where the mr images correspond to a subject comprising at least two species of protons, and where each species has a different chemical shift in its respective resonance frequency. The method also includes determining, for each species, an estimated chemical shift value, determining an estimated map of magnetic field inhomogeneity based on the estimated chemical shift values, determining an estimated susceptibility distribution of the subject and an error of each estimated chemical shift value based on the estimated map of magnetic field inhomogeneity and prior information regarding the subject, and generating an image of the subject based on the estimated susceptibility distribution..
Medimagemetric Llc
12/25/14
20140378760

Mobile capsule device and control method thereof


A mobile capsule device 10 comprises a long capsule body 11 having a permanent magnet 13 movable in the lengthwise direction with respect to the long capsule body and a coil for driving the permanent magnet 13, while a propulsion force is generated entirely by applying an alternate current to the coil and performing back and forth movements of the permanent magnet 13. The coil has first and second coil parts 15 and 16 arranged circumferentially in front and back of the permanent magnet 13, and a frequency of an alternate current applied to the first and second coil parts 15 and 16 is made to accord with a resonance frequency of the capsule device 10 generated by a back and forth vibration of the permanent magnet 13.
Kyushu Institute Of Technology
12/25/14
20140378273

Method and system for reducing driveline nvh


A method and a system for reducing driveline speed oscillations related to a driveline resonance frequency are described. Driveline speed oscillations may be reduced via slipping a driveline clutch or adjusting torque of a driveline motor/generator.
Ford Global Technnologies, Llc
12/25/14
20140375515

Frequency tunable antenna


A frequency tunable antenna is provided. Specifically, a device is provided that includes: a ground; an antenna feed; a first radiating arm connected to the antenna feed; a second radiating arm capacitively coupled to the first radiating arm; a switch connected to the second radiating arm, the switch having an open position and a closed position; an inductor connected to the switch on one side and the ground on an opposite side, and, a processor in communication with the switch, the processor configured to open and close the switch to tune a resonance frequency of at least the second radiating arm thereby changing a resonant length of the second radiating arm depending on whether the inductor is connected thereto..
Blackberry Limited
12/25/14
20140375398

Signal trasmission through lc resonant circuits


An embodiment of an electronic system includes a first electronic circuit and a second electronic circuit. The electronic system further includes a resonant lc circuit having a resonance frequency for coupling the first electronic circuit and the second electronic circuit; each electronic circuit includes functional means for providing a signal at the resonance frequency to be transmitted to the other electronic circuit through the lc circuit andor for receiving the signal from the other electronic circuit.
Stmicroelectronics S.r.l.
12/25/14
20140375257

Non-contact charging system and non-contact charging method


The present invention provides a non-contact charging system which can transmit the information on the reception state from an electric power receiving device to an electric power transmitting device while performing the electric power reception. The non-contact charging system is configured with an electric power transmitting device which performs electric power transmission at a resonance frequency and an electric power receiving device which performs electric power reception at the resonance frequency.
Renesas Electronics Corporation
12/25/14
20140375137

Electric power transmitting device, non-contact power supply system, and control method


A non-contact power supply system is provided employing an electric power transmitting device which can improve the transmission efficiency of electric power, suppressing the circuit scale. The electric power transmitting device is configured with a resonance circuit including a resonance capacity and a resonance coil acting as a transmitting antenna, and a first coil arranged magnetically coupled with the resonance coil.
Renesas Electronics Corporation
12/18/14
20140372006

Indirect tire pressure monitoring systems and methods using multidimensional resonance frequency analysis


Embodiments relate to an indirect tire pressure monitoring systems (tpms) and methods that utilize anti-lock braking system (abs) sensed signals coupled to circuitry and/or controllers to process the sensed signals using a multidimensional resonance frequency analysis (mrfa) technique. In some embodiments, additional information from other sensed signals or stored data settings for non-tire variables and parameters can be incorporated into the mrfa.
Infineon Technologies Ag
12/18/14
20140368289

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.
12/18/14
20140367211

Energy absorbing system for safeguarding structures from disruptive forces


The invention is a system and method for automatically adjusting the resonance frequency of an energy absorbing device in response to a disruptive force. By configuring an energy absorbing device for automatic response tuning, utilizing a controller coupled to one or more sensors for processing a determination primarily based on sensing data, the natural period of an overall structure may be adjusted (i.e.
12/11/14
20140361776

Magnetic resonance imaging apparatus


A magnetic resonance imaging apparatus includes a sequence controller. The sequence controller is configured to apply mt (magnetization transfer) pulses having a frequency different from a resonance frequency of free water protons and then acquires magnetic resonance signals of an object to be imaged.
12/04/14
20140354261

Method, circuit and integrated circuit for detecting resonance frequency


A method, circuit, and integrated circuit for detecting resonance frequency is disclosed in which a first operational amplifier circuit receives an input signal and provides an output signal for a resonance circuit to store energy, a zero crossing comparator circuit samples a discharge current of the resonance circuit and transforms the sampled current into a sampled voltage and outputs a square signal to a digital signal processor based on the sampled voltage, and the digital signal processor obtains a resonance frequency based on the square signal.. .
12/04/14
20140354067

Wireless power transmission designing the same


A wireless power transmission system includes a transmitting antenna, a power supply for supplying power of a resonance frequency f0 to the transmitting antenna, a first capacitor connected in series to the transmitting antenna, a receiving antenna magnetically coupled to the transmitting antenna, a load connected to the receiving antenna, and a second capacitor connected in series to the receiving antenna. Supposing that the coupling factor between the transmitting antenna and the receiving antenna is represented by k, the internal resistance of the power supply by rs and the resistance of the load by rl, then the self-inductance ls of the transmitting antenna and the self-inductance ll of the receiving antenna are determined to satisfy an equation: ls×ll=rs×r1/(2πf0k)2.
12/04/14
20140353934

Vehicle


A spring constant of each of four suspension springs and a shared load on each of four wheels are adjusted so that a sprung resonance frequency corresponding to two front wheels and a sprung resonance frequency corresponding to two rear wheels are mutually different. From among the four shock absorbers, only two shock absorbers provided corresponding to two wheels of lowered sprung resonance frequency, from among the two front wheels and the two rear wheels have respectively damping coefficient modification mechanisms that modify a damping coefficient serving as a reference of the magnitude of the damping force generated by the two shock absorbers.
12/04/14
20140353506

Electromagnetic wave spectrum analyzer and infrared thermal image analyzer including multiple resonance structures each having different resonance frequency


An electromagnetic wave spectrum analyzer includes a plurality of resonance structures each having a different resonance frequency, a plurality of thermal legs configured to support the plurality of resonance structures, a substrate including circuit elements configured to detect resistance changes in the plurality of thermal legs, and a signal processing unit configured to analyze a spectrum of incident electromagnetic waves from the resistance changes. The plurality of thermal legs are formed of a thermistor material of which an electrical resistance is changed due to thermal energy of electromagnetic waves absorbed by the plurality of resonance structures..
11/20/14
20140341394

Loudspeaker enclosure system with signal processor for enhanced perception of low frequency output


A loudspeaker system with a transducer and an enclosure with at least one resonant chamber, including a resonant-chamber resonance frequency, at which a displacement characteristic of a vibratile diaphragm of the transducer has a minimum. The loudspeaker system further includes a multi-mode signal processor with a set of signal processes wherein in one example, a variable gain, frequency selective dynamic filter reduces the gain in a high displacement frequency range upon an output in the frequency range exceeding an overload amplitude threshold.
11/20/14
20140340985

Gas spring compensation marine acoustic vibrator


Embodiments related to restriction of gas flow in a marine acoustic vibrator to compensate for gas spring effects. An embodiment provides a marine acoustic vibrator, comprising: an outer shell; and a variable gas flow restrictor disposed within the outer shell; wherein the marine acoustic vibrator has a resonance frequency selectable based at least in part on the variable gas flow restrictor..
11/20/14
20140340175

Signal transmission device, filter, and inter-substrate communication device


A signal transmission device includes substrates and resonance sections resonating at the predetermined resonance frequency. At least one of the substrates is formed with two or more resonators in the second direction, and the remaining one or two or more of the substrates are each formed with one or more resonators in the second direction, and at least one of the resonance sections is configured by a plurality of resonators opposing one another in the first direction between the substrates, the opposing resonators form a coupled resonator resonating as a whole at the predetermined resonance frequency through electromagnetic coupling in a hybrid resonance mode, and in a state that the substrates are separated away from one another to fail to establish electromagnetic coupling thereamong, the resonators forming the coupled resonator resonate at any other resonance frequency different from the predetermined resonance frequency on the substrate basis..
11/20/14
20140340003

System and controlling the stroke and operation at resonance frequency of a resonant linear motor


Linear compressor comprising a resonant linear motor (4) having a stator (9) and a linear displacer (3), the linear motor (4) cooperating with a resonant spring (2) that is driven by the linear displacer (3) at one of the ends of the resonant spring (2) with the opposite end of the resonant spring (2) cooperating with a mechanical actuation element (1). A variation sensor of magnetic flux (5) cooperates with the resonant spring (2).
11/20/14
20140339915

Wireless power transmission system


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.
11/13/14
20140334259

Variable mass load marine vibrator


Embodiments related to addition of a variable mass load to the shell of a marine vibrator to compensate for air spring effects. An embodiment provides a marine vibrator, comprising: an outer shell; a driver disposed at least partially within the outer shell and coupled thereto; and a mass load coupled to an exterior surface of the outer shell; wherein the marine vibrator has a resonance frequency selectable based at least in part on the mass load..
11/13/14
20140333305

Multiple channel nuclear magnetic resonance coil


A multi-channel nuclear magnetic resonance (nmr) coil operating at a resonance frequency includes a plurality of unit loops disposed upon a cylindrical surface of a coil body and surrounding the coil body as a closed nmr coil; and a plurality of inter-loop capacitors configured to connect adjacent unit loops respectively, wherein each unit loop comprises a signal channel and further comprises a pair of vertical conducting parts parallel to a cylindrical axis of the coil body, each vertical conducting part comprising an inductor and a first capacitor connected in serial; and a pair of horizontal conducting parts perpendicular to the cylindrical axis of the coil body, at least one horizontal conducting part comprising a second capacitor; and the inter-loop capacitor connects two respective horizontal conducting parts of adjacent unit loops disposed on a same side to eliminate coupling between signal channels of adjacent unit loops.. .
11/13/14
20140333303

Magnetic resonance rf excitation with two resonance frequencies to detect the cest effect


In a magnetic resonance apparatus and method for rf excitation with two resonance frequencies to detect the cest effect, the rf excitation is achieved with the use of a first rf antenna and a second rf antenna of the magnetic resonance apparatus with a first portion of the rf excitation at a first resonance frequency of the two resonance frequencies being implemented with the first rf antenna, and a second portion of the rf excitation at a second resonance frequency of the two resonance frequencies is implemented with the second rf antenna.. .
11/13/14
20140333153

Non-contact electric power transmission system


Disclosed is a non-contact electric power transmission system including a power feeding unit provided with a power feeding side coil to which electric power is supplied, a power receiving unit provided with a power receiving side coil electromagnetically coupled with the power feeding side coil, and a capacitor connected in parallel with at least one of the power feeding side coil and the power receiving side coil, a capacity of which is varied such that a resonance frequency of the resonance circuit when the power feeding side coil and the power receiving side coil are critically coupled in a predetermined coil-to-coil distance between the power feeding side coil and the power receiving side coil, and a resonance frequency of the resonance circuit when the power feeding side coil and the power receiving side coil are over-coupled in a distance shorter than the coil-to-coil distance are conformed.. .
11/13/14
20140331772

Ultrasonic measuring system having a reduced minimum range and detecting an obstacle


An ultrasonic measuring system is described for detecting an obstacle using a resonant transducer element for transmitting an ultrasonic pulse and for generating a received signal which includes the ultrasonic echo pulse reflected from the obstacle, the transducer element generating a decay signal having its resonance frequency after transmitting an ultrasonic pulse. The ultrasonic measuring system includes an evaluation unit having a control unit which is designed to activate the transducer element for transmitting the ultrasonic pulse with the aid of a frequency-modulated transmitted signal generated by the control unit, the frequency modulation taking place with the aid of a modulation signal in such a way that the to signature of the ultrasonic pulse differs from that of the decay signal.
11/13/14
20140331766

Method for measuring a fluid density or a fluid viscosity


A method and device for estimating a density value ρm indicative of a true density ρ or for estimating a viscosity value ηm indicative of a true viscosity η of a fluid is disclosed. For this, a first resonance frequency fr of a first mechanical oscillator in a reference volume and a second resonance frequency ff of a second mechanical oscillator in contact with the fluid are measured.
11/13/14
20140331747

Method for determining and/or monitoring viscosity and corresponding apparatus


A method for determining and/or monitoring the viscosity of a medium, wherein a mechanically oscillatable unit is excited to execute oscillations based on an exciter signal, and wherein oscillations are received from the mechanically oscillatable unit and transduced into a received signal. The eigenfrequency and/or resonance frequency of the mechanically oscillatable unit and/or phase relationship between the exciter signal and the received signal are/is ascertained and/or monitored, and from changes in the eigenfrequency and/or resonance frequency and/or phase relationship, a change in viscosity is deduced and/or, based on dependencies of the oscillations on the viscosity of the medium, from the eigenfrequency and/or resonance frequency and/or phase relationship, viscosity is ascertained.
11/06/14
20140328091

Power converter


A power converter includes a rectifier section, an inverter section, a capacitance element connected between inverter section input ends, an inductance element forming part of an lc filter with the capacitance element, a voltage detector detecting an inductance element voltage, and a controller controlling the inverter section based on the detected voltage. The lc filter has a resonance frequency set such that ripple current components contained in dc current outputted from the rectifier section passes through, and current components of a frequency equal to a carrier frequency of the inverter section are dampened.
11/06/14
20140327592

Antenna structure and wireless communication device employing same


An antenna structure includes an antenna and a metal member located between the antenna and an electronic member. The antenna is configured for receiving and sending wireless signals.
11/06/14
20140327398

Portable terminal adjusting rfid antenna resonance frequency


Provided is a portable terminal apparatus equipped with an rfid function, which includes a storage unit storing in advance correspondence between an apparatus configuration in which the portable terminal apparatus has a predetermined preset extension function allowed to be added thereto, and a correction value of a resonance frequency of an rfid antenna, a detection unit detecting which extension function is installed on the portable terminal apparatus, and a control unit obtaining a correction value of the resonance frequency of the rfid antenna, corresponding to an apparatus configuration including the extension function, from the storage unit and correcting the resonance frequency of the rfid antenna, based on the correction value.. .
11/06/14
20140327339

Piezoelectric resonator


A piezoelectric resonator including a base part, a first support part fixed to the base part, a beam part fixed to the first support part, a weight part fixed to the beam part, a drive unit provided on the beam part, and an adjusting magnet movable on a main surface of the base part. Furthermore, the weight part is formed of a magnet or a magnetic body, and the beam part extends in a direction along the main surface of the base part.
11/06/14
20140326858

Optical sensor arrangement and measuring an observable


An optical sensor arrangement for measuring an observable including at least one light source for generating a first light component of a first frequency including a first mode and a second light component of a second frequency including a second mode orthogonal to the first mode, an optical resonator having differing optical lengths for the first and second modes, at least one of the optical lengths being variable depending on the observable and a dependence of the respective optical length being different for the first and second modes, and a detector unit coupled to the optical resonator for coupling out the two light components and being configured for detecting a frequency difference between a resonance frequency of the optical resonator for the first mode and a resonance frequency of the optical resonator for the second mode.. .
10/30/14
20140320268

System and method to determine sterilization of a device


A system and method for verifying the occurrence of an environmental condition is disclosed. Rather than store information concerning the occurrence and/or success of the sterilization process, the present invention modifies the wireless transmission characteristics of the device.
10/30/14
20140320266

System for interrogating a remotely interrogatable passive sensor integrated into a metal cavity with reduced system loss and interrogation method


A system comprises a cavity being reflecting for rf waves and comprises at least one acoustic wave sensor exhibiting a resonance frequency band, coupled to a sensor antenna; and an interrogation/reception device for the sensor. The interrogation/reception device comprises: means for transmitting/receiving an rf signal transmitting within an interrogation frequency band comprising the resonance frequency band of the sensor; at least a first transmission/reception antenna and a second transmission antenna/reception, positioned within the cavity; means for dividing the signal into at least a first rf signal and a second rf signal, the first signal being transmitted to the first transmission/reception antenna and the second signal being transmitted to the second transmission/reception antenna; means for creating a phase-shift between the first rf signal and the second rf signal; means for analysing the power level of the received signal.
10/30/14
20140318220

Pressure measuring device, pressure measuring method and leakage inspecting device


A pressure measuring device includes: a tube fixable to a sample body along its surface; a pressure sensor and a closing plug both fixed inside the tube with a predetermined gap therebetween; a pipe for supplying reference pressure; a space defined between the sensor and the plug; and a pressure detecting hole penetrating the tube and communicating with the space. Since a volume of the space between the sensor and the plug is small, unsteady pressure fluctuations to be measured are prevented from being made unclear, thereby improving measurement accuracy.
10/16/14
20140305510

Automatic passive control of liquid positioning in microfluidic chips


A device for controlling liquid motion includes a substrate (10) of material having piezoelectric properties, and a system for controlling the motion of a quantity of liquid placed in contact with the substrate. The control system includes at least one interdigitated transducer (t1, t3, t5, t7), applied to the substrate (10) and designed for selectively generating a surface acoustic wave adapted to propagate on the substrate (10) and interact with the quantity of liquid.
10/16/14
20140305191

Resonant fiber based aerosol particle sensor and method


The present invention relates to methods and devices for determining the weight of small particles, typically being nano-sized particles by use of resonating fibers in the form of elongate members being driven into resonance by an actuator or e.g. Thermal noise/fluctuation.
10/09/14
20140303918

Handling resonances in a power transmission system


A method, resonance handling device and computer program product are disclosed for handling resonances in a power transmission system. The resonance handling device can include a resonance frequency determining unit configured to obtain measurements (y1, y2, yr) from measurement devices in the power transmission system, apply the measurements in at least one state space model (m1, m2) and determine modal resonance frequencies (ωj) in the system based on the application of the system measurements in the state space model, and an activity determining unit configured to determine the modal activity of at least one of the resonance frequencies..
10/09/14
20140300455

Vehicle approach warning apparatus


A vehicle approach warning apparatus for abnormality detection in various abnormal modes is provided. In the vehicle approach warning apparatus, a sound generator output from the microcomputer passes an amp and hpf, and an output voltage corresponding to the sound generator output is applied to a speaker to emit vehicle approach sound.
10/09/14
20140300359

Radio-frequency coil arrays and methods of arranging the same


In accordance with various embodiments, a radio frequency (rf) coil array for use in a magnetic resonance imaging (mri) system includes at least first and second rf coils. Each of the rf coils have a main body loop configured to at least one of transmit or receive rf energy at an operating imaging frequency in connection with acquiring mri image data for an mri system.
10/09/14
20140300357

Method and magnetic resonance system to determine a resonance frequency deviation


In a first method and magnetic resonance apparatus to determine a resonance frequency deviation given an excitation of a slice of a volume segment within an examination subject, by a slice selection gradient is activated along one direction, an rf excitation pulse is irradiated in order to excite nuclear spins in the slice, a readout gradient is activated along the direction of the slice selection gradient, and mr data are read out while the readout gradient is activated. Image points within an mr image reconstructed using the mr data are identified, that exhibit a signal intensity that is greater than a predetermined threshold, in order to determine one of the image points that has a maximum separation in the direction between this image point and the slice.
10/09/14
20140300202

Wireless power supply apparatus, wireless power supply system, and wireless power supply method


A wireless power supply apparatus includes a power supplying unit that supplies electric power to a power transmission coil at a resonance frequency at which magnetic field resonance is generated between the power transmission coil and a power reception coil, the power transmission coil sending out electric power as magnetic field energy, using the magnetic field resonance; a detecting unit that detects a phase difference of current flowing in the power transmission coil for voltage applied to the power transmission coil; and a control unit that switches an amount of the electric power supplied by the power supplying unit, based on the phase difference.. .


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Resonance Frequency topics: Resonance Frequency, Circuit Switch, Addressing, Signal Processing, Low Frequency, Ultrasonic, Transducer, Piezoelectric, Shift Module, Frequency Band, Blood Pressure, Wireless Power, Circuit Switching, Fault Detection, Ground Fault Detection Circuit

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