|| List of recent Resonance Frequency-related patents
|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..
|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.. .
|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.
|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.
|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.
|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.
|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.
|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.
|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
|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
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..
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
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
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..
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.
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
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
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
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.
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.
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.
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.. .
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.
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.
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..
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.
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..
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..
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).
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.
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..
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.. .
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.. .
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.. .
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.
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.
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.
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.
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.
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.. .
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.
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.. .
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.
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.
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.
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.
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.
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..
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.
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.
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.
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.. .
Surface deformation sensor
A surface deformation sensor that includes a resonance circuit is described herein. The resonance circuit includes a sensing capacitor and inductive coil.
Packaged capacitor component with multiple self-resonance frequencies
A packaged capacitor component such as a surface mount technology capacitor component may be formed with multiple self-resonant frequencies. The capacitor component may include multiple capacitor portions separated by dielectric layers.
Resonator element, resonator, oscillator, electronic apparatus, and moving object
A resonator element includes a base portion and a pair of vibrating arms that are provided integrally with the base portion and extend in a y-axis direction from a distal end of the base portion. When the lengths of the vibrating arms are set to l and the lengths of hammerheads are set to h, a relation of 0.183≦h/l≦0.597 is satisfied.
Atomic oscillator and manufacturing the atomic oscillator
An atomic oscillator includes an atomic cell in which an atom is enclosed, a magnetic field generation part to apply a magnetic field to the atomic cell, a reference oscillator which is controlled based on an atomic resonance signal outputted from the atomic cell and generates a reference signal, and a fractional n-pll which receives the reference signal to generate a signal including a resonance frequency of the atom, in which when a maximum digit of the resonance frequency adjustable by the magnetic field generation part is a boundary digit, the fractional n-pll can adjust at least a digit one digit higher than the boundary digit.. .
Millimeter-wave band spectrum analysis device and analysis method
An input signal sx in a first millimeter-wave frequency band higher than 100 ghz is input to a millimeter-wave band filter 20 in which a pair of radio wave half mirrors 30a and 30b so as to opposite to each other and which performs a resonance operation. A signal component sa corresponding to the resonance frequency of the filter is extracted, is mixed with a first local signal l1 with a fixed frequency, and is converted into a signal in a second frequency band.
Device for wireless inductive energy transfer to a receiver
A device for wireless inductive energy transfer to a receiver, in particular an energy storage device of an electrically powered vehicle, includes at least one transformer coil and a compensation capacitor array. During the operation of the device at a resonance frequency, the compensation capacitor array compensates for an inductive voltage drop across the transformer coil.
Power transmitting apparatus, power receiving apparatus, power transmitting method, power receiving method, and program
A power transmitting apparatus for transmitting the power to a power receiving apparatus includes a power transmitting unit configured to wirelessly transmit the power, a receiving unit configured to receive from other power transmitting apparatuses currently transmitting the power the information about the resonance frequencies used for the current power transmission, and a resonance frequency determination unit configured to, based on the resonance frequency information, determine a resonance frequency to be used for power transmission by the power transmitting unit.. .
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.