|| List of recent Resonance Frequency-related patents
| Resonant impedance sensing with drive current pulse shaping to reduce noise folding|
A resonant inductive sensing system includes in the drive current signal path of the resonator a pulse shaper for noise reduction, including reducing noise resulting from down modulation of signal energy around harmonics of the oscillator (multiples of the resonance frequency), and from uncertainty in the duration of the oscillation period. The pulse shaper is configured so that, for each modulation period of the drive current, consecutive drive current pulses are substantially identical.
| 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.
| Apparatus and reducing vibrations in a washing machine|
The present disclosure relates to an apparatus and a method of reducing vibrations in a washing machine, and particularly, to an apparatus and a method of reducing vibrations in a washing machine that may predict a resonance frequency (or vibration generation region) before operating or driving a motor during a washing process to prevent a resonance phenomenon, thereby reducing noise and vibrations in the washing machine. To this end, the apparatus may include a motor configured to transmit rotational force; a motor driving unit configured to output a motor driving signal controlling an operation of the motor; and a filter configured to remove or reject a frequency or band causing a resonance phenomenon of the washing machine and allow another frequency or band to pass through in the motor driving signal output..
|Built-in self-test technique for detection of imperfectly connected antenna in ofdm transceivers|
Ofdm communication transceiver having a receiver chain and an emitting chain, adapted to test its connection with an antenna circuit unit (11), the receiver chain comprising a time-to-frequency transform unit (15) and the emitting chain comprising a frequency-to-time transform unit (6), and the transceiver further comprising:—means for disconnecting the receiver chain to the antenna circuit unit (11);—means for providing a stimulus as input to the emitting chain;—means (22, 23) for reintroducing the signal at the output of the emitting chain as an input of the receiving chain;—means (24) for determining a circuit resonance frequency, fr, and a quality factor, q, of a transfer function computed from the output of the time-to-frequency transform unit (15);—means for deciding (25, 26) about the connection of said antenna circuit unit (11) according to these resonance frequency and quality factor.. .
|Nfc antenna module and nfc module including the same|
A resonance frequency of a near field communication (nfc) antenna module may be set to be equal to a first frequency by a resonance unit included in the nfc antenna module. The nfc module may include a matching circuit connected to the nfc antenna module.
Samsung Electronics Co., Ltd.
|Motor controller for electric vehicle|
A motor controller for an electric vehicle sufficiently reduces vibration components caused by torque ripples passing through a resonance frequency of a vehicle body. The motor controller includes motor torque setting means for generating a first torque command, based on vehicle information, rotation position detection means for detecting a rotation position of the motor, rotation speed calculation means for calculating a rotation speed from a rotation position signal, a high-pass filter that extracts an ac signal component of a rotation speed signal, and a resonance suppression gain circuit that outputs a resonance suppression signal.
Mitsubishi Electric Corporation
|System and determining density of a medium in a tank|
A system and method for determining a density of a non-conducting medium in a tank is disclosed where the relationship between a dielectric constant and a density of the medium is known. The system comprises a transceiver, and a waveguide, the waveguide extends towards and into the medium.
Rosemount Tank Radar Ab
|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.
|Wavelength sweepable laser source|
Wavelength sweepable laser source is disclosed, wherein the laser source is a semiconductor laser source adapted for generating laser light at a lasing wavelength. The laser source comprises a substrate, a first reflector, and a second reflector.
Danmarks Tekniske Universitet
|Physical quantity sensor|
A physical quantity sensor has a resonance frequency f1 in same-phase mode and a resonance frequency f3 in same-phase absorptive mode greater than the resonance frequency f1. An absolute value Δf3 is a difference between the resonance frequency f3 in the same-phase absorptive mode and a value that is the product of the resonance frequency f1 in the same-phase mode multiplied by n; an avoidance difference d indicates a degree of deviation of the absolute value Δf3 from the resonance frequency f1 in the same-phase mode.
Microwave resonator sensor and associated methods of sensing
The sensor for sensing at least a physical property of an environment generally has a microwave resonator having a top conductive layer, a bottom conductive layer and a substrate layer therebetween, the substrate layer being made of a first dielectric material, a fence electrically connecting the top conductive layer to the bottom conductive layer across the substrate layer, and enclosing at least one resonance cavity, at least one microwave signal port across the fence, at least one sensing portion of a second dielectric material functionalized to the physical property of the environment, extending in the at least one resonance cavity and being exposed to the environment across at least one of the top conductive layer and the bottom conductive layer, the microwave resonator having at least one resonance frequency being dependent of the exposure of the second dielectric material with the environment to affect a microwave signal resonating therein.. .
3r Valo, Société En Commandite
Transmission line filter with tunable capacitor
A tunable filter design. The filter is implemented using transmission line sections as inductive and capacitive components.
Method and controlling an antenna
A system that incorporates the subject disclosure may include, for example, a method for coupling a primary antenna to an auxiliary antenna portion with a current-controlled switch. The method further includes generating a unidirectional direct current or a first bias voltage having a first polarity to cause the current-controlled switch to substantially form a conduction channel between the primary antenna and the auxiliary antenna portion.
Tunable interdigitated capacitor
A tunable capacitor implemented as interdigitated arrays of finger elements arranged so that the spacing between finger arrays may be adjusted. The design has a number of advantages including high capacitance for a given circuit area, small area for a given desired capacitance, mechanical stability, high self resonance frequency, and high quality factor..
Ultrasonic inspection device and method
An ultrasonic transmitter 3 attached to an inspecting target object 1, an ultrasonic receiver 5 receiving a reflected wave of the ultrasonic wave that has propagated from the ultrasonic transmitter 3 in the inspecting target object, a data processing device 7 acquiring position specifying data for specifying a position of a defect 1a in the inspecting target object 1 on the basis of received data representing a waveform of the reflected wave received by the ultrasonic receiver 5 are provided. The ultrasonic wave generated by the ultrasonic transmitter 3 has been frequency-modulated, and has a waveform composed of components of respective frequencies that are deviated from a resonance frequency of the ultrasonic transmitter 3 and the ultrasonic receiver 5.
Ihi Inspection And Instrumentation Co., Ltd.
Detection device, sensor, electronic apparatus and moving object
A detection device includes: a drive circuit that receives a feedback signal from a vibrator and drives the vibrator; a detection circuit that performs detection based on a signal from the vibrator and outputs detection data; and a digital signal processing unit that performs digital filtering for the detection data from the detection circuit. The digital signal processing unit performs band elimination filtering for attenuating a component of a detuning frequency Δf=.
Sensor unit for quantification of physical training with rubber band
A sensor unit (18) adapted for mounting on a rubber band (17) for physical training the sensor unit comprises attachment means such as a clamp (4, 5), means (10) for measuring the tension of the rubber band, a power source (1), a processor (11) and optionally a signal transmitter (12) for cable or wireless data transfer. In one embodiment, the means for measuring the tension is an integral part of the attachment means.
Motor driving device
A motor driving device includes an inverter circuit having switching elements; and a control device controlling the switching of the switching elements. The control device sets a carrier frequency to f1 when a two-phase modulation scheme is selected, and sets the carrier frequency to f0, which is half of the carrier frequency f1, when a three-phase modulation scheme is selected.
Wireless power transmitter, wireless power receiver, wireless power transmission method and wireless power reception method
A wireless power reception method of a wireless power receiver for receiving power from a wireless power transmitter is disclosed. The wireless power receives a connection signal for identifying the wireless power receiver from the wireless power transmitter; transmitting a response signal in response to the connection signal to the wireless power transmitter; negotiating a power transmission condition with the wireless power transmitter; and receiving the power using resonance frequency band according to the negotiated power transmission condition.
Lg Innotek Co., Ltd.
Wavelength tunable mems-fabry perot filter
A wavelength tunable gain medium with the use of micro-electromechanical system (mems) based fabry-perot (fp) filter cavity tuning is provided as a tunable laser. The system comprises a laser cavity and a filter cavity for wavelength selection.
Nuclear quadrupole resonance interfacing with a subject material
An improved system for interfacing with a subject material is provided where an interface material having target atoms with a known nuclear quadrupole resonance frequency is purposely associated with a subject material. An excitation signal is used to cause a nuclear quadrupole resonance of the target atoms and a receiving devices receives a received signal comprising a probe signal energy.
Method for detecting a perturbation by hysteretic cycle using a nonlinear electromechanical resonator and device using the method
A method is provided for detecting a perturbation with respect to an initial state, of a device comprising at least one resonant mechanical element exhibiting a physical parameter sensitive to a perturbation such that the said perturbation modifies the resonance frequency of the said resonant mechanical element. A device is provided for detecting a perturbation by hysteretic cycle comprising at least one electromechanical resonator with nonlinear behaviour and means for actuation and for detection of the reception signal via a transducer so as to analyse the response signal implementing the method.
Centre National De La Recherche Scientifique
Sensor with a vibrating member in a cavity with integrated anomaly detection
The resonator (10) with a vibrating element is placed in an oscillating circuit controlled by a closed-loop control, the oscillating circuit supplying an oscillating signal y(t) at a resonance frequency fp representing the measurement of a physical quantity. The resonance frequency is calculated by counting pulses over a time window.
Systems and methods for producing and delivering ultrasonic therapies for wound treatment and healing
One embodiment is directed to a non-contact, medical ultrasound therapy system for generating and controlling low frequency ultrasound. The ultrasound therapy system includes a treatment wand including an ultrasonic transducer, a generator unit, and a cable coupling the treatment wand to the generator unit.
Sensor device and label-free detecting of nucleic acid sequences
A sensor device (100), which is adapted for detecting target molecules having a target nucleic acid sequence, comprises an optical whispering gallery mode (wgm) resonator (10) having a resonance frequency, wherein the wgm resonator is functionalized with a double-strand dna precursor compound and the 10 resonance frequency depends on a mass load provided by the double-strand precursor compound, the double-strand precursor compound is capable of a target-specific strand displacement reaction with the target molecules, and in response to the strand displacement reaction, the double-strand precursor 15 compound is capable to be partially decoupled from the wgm resonator (10), wherein the mass load can be decreased and the resonance frequency of the wgm resonator can be increased. Furthermore, a sensing method for detecting target molecules including nucleic acid sequences is described..
Radiation imaging sensor
The present invention relates to a radiation imaging sensor with at least one detection element, which is implemented on a substrate as a micromechanical resonator and which absorbs the radiation to be detected. The resonator is set into a resonant oscillation with an excitation device and a shift in the resonance frequency of the detection element under exposure to radiation is detected with a detection device.
Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.
Physical/chemical sensor and measuring specific substance
A physical/chemical sensor has a movable membrane (3) having a diaphragm structure provided to form a hollow section (2) between the movable membrane (3) and a light receiving surface of a light receiving element (1), a first piezoelectric membrane (4) that is provided on a front-side surface or a backside surface of the movable membrane (3) and that excites the movable membrane (3), and a second piezoelectric membrane (5) that is provided on the front-side surface or the backside surface of the movable membrane (3) and that senses a voltage caused by oscillation of the movable membrane (3). A measuring method using the physical/chemical sensor applies a voltage to the first piezoelectric membrane (4) while changing frequency and senses resonance frequency by sensing a voltage outputted from the second piezoelectric membrane (5)..
Rapid interrogation elastic wave resonant devices
A method for interrogating an elastic wave device includes probing the response of a piezoelectric resonant device at a single frequency alternately on either side of a previously determined first resonance frequency, to characterize this resonance frequency characteristic of the measured physical quantity, by correlating this single measurement with a previously performed measurement.. .
Wireless power transfer device and wireless charging system having same
The present specification provides a wireless power transfer device formed to transmit power to a wireless power reception device, and a power transfer unit in the wireless power transfer device comprises: a first coil formed to generate a magnetic field so as to transmit power in an induction scheme; and a second coil wound around the first coil and formed to generate a magnetic field vibrating at a resonance frequency so as to transmit power in a resonance scheme.. .
Lg Electronics Inc.
A multi-frequency antenna includes a ground layer, at least one antenna unit and at least one antenna network. The antenna unit has its one end electrically connected to the ground layer and its other end electrically connected to the antenna network for generating at least one first resonance frequencies.
Apparatus for generating mechanical oscillations and a determining the resonance frequency of such apparatus
A device for generating mechanical oscillations is provided. The device has a first mass, a second mass, and a piezoelectric excitation system mechanically coupling the first mass and the second mass to one another, with the piezoelectric excitation system having a stiffness.
Fiber scanning optical probe and medical imaging apparatus including the same
Fiber scanning optical probes and medical imaging apparatuses including the same are provided. The fiber scanning optical probe includes an optical fiber; an actuator attached onto the optical fiber and configured to drive the optical fiber at a driving resonance frequency; a mass provided at a side of the optical fiber and configured to control the driving resonance frequency; and a frequency separator provided on a portion of the optical fiber between the actuator and the mass, the frequency separator being configured to separate the driving resonance frequency into separate resonance frequencies..
Samsung Electronics Co., Ltd.
Wireless transceiver device and antenna module thereof
A wireless transceiver device and an antenna module thereof, the antenna module has the current path of a first resonance frequency band and the current path of a second resonance frequency band. The first resonance frequency band partially overlaps the second resonance frequency band.
Lynwave Technology Ltd.
Power feeding device and contactless power feeding system provided with power feeding device
A power feeding device utilizing an electromagnetic resonance coupling method and a contactless power feeding system can be provided. A coupling coefficient of electromagnetic induction coupling in the power feeding device and/or the inside of a power receiving device is optimized to improve electric power transmission efficiency of a resonance frequency regardless of positions of the power feeding device and the power receiving device.
Semiconductor Energy Laboratory Co., Ltd.
Optical scanning apparatus, image forming apparatus including the optical scanning apparatus, and adjusting resonance frequency at oscillating mirror unit in the optical scanning apparatus
A groove in which a curable resin is filled, is formed on the opposite side face of a face for reflecting light of an oscillating mirror unit. The groove extends so as to cross the swing axis of the oscillating mirror unit, seen from the opposite side of the reflection face of the oscillating mirror unit..
Kyocera Document Solutions Inc.
Chip antenna and communication circuit substrate for transmission and reception
A first radiating electrode of a split ring resonator type is formed on a side face of a substrate of a rectangular cuboid antenna device so as to be at a right angle to a ground electrode surface, a second radiating electrode is provided on a top surface of the substrate, the first radiating electrode and the second radiating electrode are capacitively coupled, and the resonance frequency of the first radiating electrode and second radiating electrode are configured to be approximately in symmetry with the central frequency of the used frequency.. .
Taiyo Yuden Co., Ltd.
Angular velocity sensor, electronic apparatus, and moving object
An angular velocity sensor includes fixing units, a base portion, beam portions that support the base portion with respect to the fixing units, driving vibrating arms connected to the base portion, and detection vibrating arms connected to the base portion. When a width of a detection frequency band is set to f1 [hz], a resonance frequency in a rotational vibration mode in which the base portion rotates and vibrates around a detection axis with respect to the fixing units in association with the deformation of the beam portions is set to f2 [hz], and a detuning frequency is set to f3 [hz], the relation of f1<f2<f3 is satisfied..
Seiko Epson Corporation
Angular velocity sensor, electronic apparatus, and moving object
In an angular velocity sensor, when a width of a detection frequency band is set to f1 [hz], a resonance frequency in a first rotational vibration mode in which a base portion rotates and vibrates around a detection axis with respect to fixing units in association with the deformation of beam portions is set to f2 [hz], a detuning frequency is set to f3 [hz], and a resonance frequency in a second rotational vibration mode, having a phase opposite to that of the first rotational vibration mode, in which the base portion rotates and vibrates around the detection axis with respect to the fixing units in association with the deformation of the beam portions is set to f4, a relation of f1<f2<f3<f4 or a relation of f1<f2<f4<f3 is satisfied.. .
Seiko Epson Corporation
Sound absorber and image forming apparatus incorporating same
A sound absorber includes a duct member constituting a resonance pathway, the duct member including a pathway portion communicating ends of the duct member; a base member including a concave portion; and a cover member including a neck in which to insert the duct member. The cover member covers the concave portion of the base member, and the cover member combined with the base member forms a resonance space having a volume v the resonance pathway has dimensions of a length lh and a cross-sectional area sh and communicates the resonance space and an exterior of the sound absorber.
Ricoh Company, Ltd.
Non-invasive measurement of dielectric properties of a substance
The invention pertains to an apparatus and a method for determining a dielectric property of a first substance in a composition in a non-invasive manner. The composition includes at least the first substance to be measured and a second substance.
Parelectrics Ug (haftungsbeschränkt)
Antenna resonance frequency control driver
An antenna control circuit including: an h-bridge circuit including three half-bridge circuits; and a controller configured to control the h-bridge circuit; wherein a first half-bridge circuit and a second half-bridge circuit of the three half-bridge circuits are configured to electrically connect across a resonant antenna with a first resonant frequency and a second resonant frequency; wherein a third half-bridge circuit is configured to electrically connect to a first capacitance connected to the resonant antenna, wherein the controller is configured to control the third half-bridge circuit to switch the connection of the first capacitance to the resonant antenna to a first position that changes the resonant frequency of the resonant antenna to the first resonant frequency.. .
Provided is a dynamometer system capable of stable speed control and position control even in instances of large load inertia. A speed-control device (6c) in a dynamometer system is provided with: a speed-control-circuit unit (61a) for calculating a torque-current-command value (t2) on the basis of an angular-velocity-command value (ωref) and the angular velocity (ωm) of the dynamometer; a disturbance-observer-compensation unit (63c) for correcting the torque-current-command value by subtracting a disturbance observer (tobs) from the torque-current-command value (t2); and a shaft-torque-detection-compensation unit (62a) for correcting the torque-current-command value by adding a shaft-torque-detection-compensation amount (tsh_k), which is obtained by multiplying a filter transfer function (gbpf) and a control gain (k1) by a shaft-torque-detection value (tsh), to a torque-current-command value (t1).
Receiver and transmitter of coping with interference in super-regenerative communication system, and using the receiver and the transmitter
A receiver and a transmitter that copes with interference in a super-regenerative communication system, and a method of using the receiver and the transmitter, are provided. A super-regenerative receiver includes a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal that is received from a transmitter.
Samsung Electronics Co., Ltd.
Method of surface hardening sintered bodies by using vibrations
The present invention relates to a method of surface hardening a plurality of sintered bodies having a hard phase and a binder phase. The method includes the steps of placing the bodies in a container, and forming a system including the container and the bodies therein, and causing the bodies to move and collide with each other and with inside walls of the container.
Sandvik Intellectual Property Ab
Extraction of tire characteristics combining direct tpms and tire resonance analysis
Embodiments relate to tire characterization systems and methods for combining direct tire pressure monitoring systems (tpms) and tire resonance analysis in indirect tire pressure monitoring systems (tpms) for the extraction of tire characteristics to characterize other tire parameters. In embodiments, itpms and methods that utilize anti-lock braking system (abs) sensed signals coupled to an electronic control unit (ecu) that may comprise circuitry and/or controllers to process the sensed signals using a resonance frequency analysis (rfa) technique can be combined with direct tire pressure sensor measurements from direct tpms systems.
Infineon Technologies Ag
Autonomous intracorporeal capsule with frequency conversion energy harvesting
The energy harvester module of the capsule comprises: a primary oscillating structure subjected to an external low-frequency stress; a secondary oscillating structure comprising an elastic element and able to vibrate in high-frequency resonance; and an electrostatic structure with a first electrode coupled to the primary structure and a second electrode coupled to the secondary structure. The electrodes exert a mutual attraction between them driving the secondary structure away from its stable equilibrium position with tensioning of the elastic element, up to a limit beyond which the secondary structure is released by relaxation effect to vibrate at a resonance frequency.
Sorin Crm Sas
Antenna module and a wireless communication
An antenna module for wireless communication comprises an antenna element, a first port and a second port. The antenna element comprises a first resonance frequency and a second resonance frequency.
Broadband capacitively-loaded tunable antenna
A broadband capacitively-loaded tunable antenna, and device there for is provided. The device comprises: an antenna feed; a first radiating arm connected to the antenna feed; a second radiating arm capacitively coupled to the first radiating arm; an adjustable reactance device connecting the second radiating arm to one or more of a ground and a third radiating arm; and, a processor in communication with the adjustable reactance device, the processor configured to adjust a reactance of the adjustable reactance device to tune a resonance frequency of a combination of the second radiating arm, the adjustable reactance device, and, when present, the third radiating arm..
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
Electric field ferromagnetic resonance excitation method and magnetic function element employing same
To realize an electric field-driven type ferromagnetic resonance excitation method of low power consumption using an electric field as drive power, and provide a spin wave signal generation element and a spin current signal generation element using the method, a logic element using the elements, and a magnetic function element such as a high-frequency detection element and a magnetic recording device using the method. A magnetic field having a specific magnetic field application angle and magnetic field strength is applied to a laminate structure in which an ultrathin ferromagnetic layer sufficiently thin so that an electric field shield effect by conduction electrons does not occur and a magnetic anisotropy control layer are directly stacked on each other and an insulation barrier layer and an electrode layer are arranged in order on an ultrathin ferromagnetic layer side.
National Institute Of Advanced Industrial Science And Technology
An embedded antenna includes: a metal protrusion portion for providing a first resonance frequency; a co-axial cable for providing a second resonance frequency; and a ground portion. The co-axial cable is fixed and electrically connected to the ground portion.
Quanta Computer Inc.
A duplexer includes a reception filter that is connected between a reception terminal and an antenna terminal and includes one or a plurality of series resonators that are acoustic wave resonators, and a transmission filter that is connected between a transmission terminal and the antenna terminal and includes one or a plurality of acoustic wave resonators, a resonance frequency of a first series resonator that is one of the one or the plurality of series resonators and is closest to the antenna terminal in the reception filter being higher than an upper limit frequency of a reception band of the reception filter.. .
Taiyo Yuden Co., Ltd.
Power supply apparatus
A power supply apparatus includes a power supply section and a control section. The power supply section includes a first switch which performs switching of power-supply output, an inductor and a capacitor which form an lc circuit that resonates current flowing through the first switch, and a second switch which changes capacitance of the capacitor.
Method to produce and scale-up cocrystals and salts via resonant acoustic mixing
A method to produce and manufacture cocrystals and salts is disclosed wherein crystalline solids and other components were combined in the desired proportions into a mixing chamber and mixed at high intensity to afford a cocrystalline product. No grinding media were required.
Nalas Engineering Services Inc.
Device and lateral environment detection of a motor vehicle
A device for lateral environment detection of a motor vehicle and a method for the substantially simultaneous operation of a parking support device and a door protection device is provided. The parking support device and the door protection device perform an environment detection with structurally identical environmental sensors.
Linear motor, a linear compressor, a controlling a linear compressor, a cooling system, and a linear compressor controlling a system
A linear motor (10), a linear compressor (100), a method of controlling a linear compressor (100), a cooling system (20) and a system of controlling a linear compressor (100) to operate a linear compressor (100) in resonance in it's the greatest possible efficiency throughout its operation are described. One of the ways of achieving these objectives is by means of a linear compressor (100) applicable to a cooling system (20), the linear compressor (100) comprising a piston (1) driven by a linear motor (10), the piston (1) having displacement range controlled by means of a controlled voltage (vm), the controlled voltage (vm) having a voltage frequency (φp) applied to the linear motor (10) and adjusted by a processing unit (22), the range of piston (1) displacement being dynamically controlled in function of a variable demand of the cooling system (20), the linear compressor (100) having a resonance frequency, the processing unit (22) adjusting the range of piston (1) displacement, so that the linear compressor (100) will be dynamically kept on resonance throughout the variations in demand of the cooling system (20)..
A reflectarray reflects an incident wave in a desired direction, and the reflectarray includes a plurality of elements arranged in a first direction and in a second direction perpendicular to the first direction. The elements reflect the incident wave.
Ntt Docomo, Inc.
Audio signal processing apparatus, method, and program
An audio signal processing apparatus that includes a band division section, an analysis section, a gain adjustment amount calculation section, and a gain adjustment section. The band division section is configured to generate a resonance in-band signal by band division on an audio input signal.
Controller and a controlling a process variable and a power supply circuit comprising a power supply and a controller
A controller (100; 200) for controlling a process variable (202) comprises an input interface (102) configured to receive a feedback signal indicative of an error between a process variable (202) to be controlled and a setpoint (104) for the process variable. At least a first integrator is (108) configured to derive an accumulated error signal using an integrator input signal depending on the feedback signal and at least one resonator having a predetermined resonance frequency is configured to provide a resonator output signal using a resonator input signal depending on the feedback signal.
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.. .
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..
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.. .
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.. .
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.
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.