103 results about "Phase coupling" patented technology

Inertial sensors with reduced sensitivity to quadrature errors and micromachining inaccuracies include a gyroscope incorporating two specially-configured single-axis gyroscopes for sensing rotations about two orthogonal axes (the axes of sensitivity) in the device plane, where each single-axis gyroscope includes a resonator having two rotationally-dithered shuttles interconnected by a fork and each shuttle is configured to tilt out-of-plane along a tilt axis perpendicular to the axis of sensitivity and includes corresponding Coriolis sensing electrodes positioned along an axis perpendicular to the tilt axis (i.e., parallel to the axis of sensitivity). The two single-axis gyroscopes may be interconnected, e.g., by one or more in-phase or anti-phase couplings interconnecting the forks and / or the shuttles.

The invention relates to a three-degree-of-freedom magnetic suspension switch reluctance motor, and belongs to the field of magnetic suspension switch reluctance motors and magnetic suspension bearings. A motor stator is composed of a radial magnetic filed motor stator body and two magnetic bearing stator bodies. The radial magnetic filed motor stator body and the two magnetic bearing stator bodies are of a salient pole structure, a motor winding winds each stator tooth of the radial magnetic filed motor stator body, and a magnetic bearing winding winds each stator tooth of each magnetic bearing stator body. A rotor is composed of a salient pole rotor body and two cylindrical rotor bodies in an axial superposition mode, the salient pole rotor body is located between the two cylindrical rotor bodies and is used for generating torque, and the cylindrical rotor bodies are used for generating radial and axial suspension force. The three-degree-of-freedom magnetic suspension switch reluctance motor integrates a bearingless switch reluctance motor and an axial magnetic suspension bearing, and is high in integrity. Only one set of windings is arranged on the radial magnetic bearing stator teeth, the stator bodies are of the salient pole structure, and therefore a plurality of structure modes can be selected. The minimum inductance area is used for suspension control, suspension current has little influence on torque current, and the inter-phase coupling effect is little.

The invention relates to a thermoelectricity tri-generation method and a system thereof, wherein the system includes a thermoelectricity tri-generation set used for generating the electric energy and the heat energy; an air-condition coupled with the thermoelectricity tri-generation set through the power line and for driving the heat pump to generate the heat energy by the electric energy generated by the thermoelectricity tri-generation set; an air-condition ammeter phase coupling with the air-condition specially used for detecting the power consumption of the heat pump in the air-condition; a control device used for obtaining the electric energy of the thermoelectricity tri-generation set and the optimal working point data generated by the heat energy according to the electric consumption data and the energy consumption, and controlling the operation of the thermoelectricity tri-generation set based on the optimal working point data. Adopting the device, the inhabitant heating users are divided into the air-condition heat pump heating users and the hot water type radiator centralized heating users, and the electric energy and the heat energy are supplied to the heating users by the thermoelectricity tri-generation for the requirement in the winter, which reduces the heat road difference in the summer and waiter, advances the energy source using efficiency and the economical profit of the thermal power plant.

The invention provides a device and a method for detecting a high sound pressure-phase shifting characteristic of a microphone. A variable-section closed space is formed by an equal-phase coupling cavity, a variable-section reflection end cover, a standing wave tube and a bottom reflection end cover; a loudspeaker in the standing wave tube is connected with a power amplifier; the power amplifier is connected with a signal source; the signal source is connected with a computer; a reference microphone and a calibrated microphone are respectively arranged on the side wall of the equal-phase coupling cavity and are connected with a signal amplifier; and the signal amplifier is connected with the computer. The method comprises the following steps of: controlling the signal source by the computer, and driving the loudspeaker in the standing wave tube to send a sound wave signal by the power amplifier; and performing cross-spectrum analysis on a signal which is acquired by the reference microphone and the calibrated microphone, so as to obtain a phase difference of the calibrated microphone relative to the reference sensor under a certain condition. A sound source has high sound pressure of 94 to 160 decibels according to a standing wave sound field theory, and the distortion degree is less than 1 percent; and therefore, the phase shifting characteristic of the phase sensitivity of the microphone is calibrated under a high sound pressure environment.

A reference image of a pattern having a first pitch and projected on a sample 1 by a projector 6 is captured by a camera 5. Next, a measuring image of a pattern having a second pitch and projected on the sample 1 by the projector 6 is captured by the camera 5. Here, the second pitch of the pattern light is determined by a value calculated based on the phase resolution of the pattern light having the first pitch. Then, using the reference image thus obtained, phase coupling for the measuring image is performed. The three-dimensional shape of the sample is obtained in this manner.

An apparatus comprises a data processing unit, which causes the apparatus to: receive at least two electroencephalographic signals of a brain of a person; form a first information about at least one of the following: phase-to-phase coupling between at least two electroencephalographic signals, phase-to-amplitude coupling between at least two electroencephalographic signals and amplitude-to-phase coupling between at least two electroencephalographic signals, the first information being related to slow waves having frequencies at or lower than 1 Hz; normalize the first information; and output information about the normalized first information.

The invention discloses a hybrid integrated composite cavity wave length-tunable laser transmitter. Optical waveguides of a passive photonic chip sequentially comprise phase control regions, a first reflection grating, a phase coupling region and a second reflection grating, and a tunable laser outer cavity is formed by the phase control regions, the first reflection grating, the phase coupling region and the second reflection grating. Optical waveguides connecting the phase coupling regions are Y-branch waveguide couplers of two asymmetrical waveguide arms, wherein the second reflection grating is arranged on one waveguide arm, and a waveguide laser intensity modulator is arranged on the other waveguide arm; tunable lasers are output from the middle of a composite reflection mirror in a light split mode, and is then transmitted and output at the speed modulated according to the laser intensity of the lasers from a port of the waveguide arm provided with the waveguide laser intensity modulator. Because the second reflection grating and the waveguide laser intensity modulator are arranged on the two Y-branch waveguide couplers of the two asymmetrical waveguide arms respectively, the size of the hybrid integrated composite cavity wave length-tunable laser transmitter is reduced; the waveguide laser intensity modulator can achieve high-speed laser transmission.

A power line phase coupler system for repeating data signals between power line phases that can be easily installed by a user. The power line phase coupler system includes a housing, a female connector positioned within the housing, a male connector electrically connected to the female connector by a length of cord, and a repeater coupler electrically connected to the male connector. The repeater coupler is electrically connected between Phase A and Phase B of the male connector for repeating and amplifying a data signal received from either phase to the opposite phase.

The invention relates to a thermoelectricity tri-generation method and a system thereof, wherein the system includes a thermoelectricity tri-generation set used for generating the electric energy and the heat energy; an air-condition coupled with the thermoelectricity tri-generation set through the power line and for driving the heat pump to generate the heat energy by the electric energy generated by the thermoelectricity tri-generation set; an air-condition ammeter phase coupling with the air-condition specially used for detecting the power consumption of the heat pump in the air-condition; a control device used for obtaining the electric energy of the thermoelectricity tri-generation set and the optimal working point data generated by the heat energy according to the electric consumption data and the energy consumption, and controlling the operation of the thermoelectricity tri-generation set based on the optimal working point data. Adopting the device, the inhabitant heating users are divided into the air-condition heat pump heating users and the hot water type radiator centralized heating users, and the electric energy and the heat energy are supplied to the heating users by the thermoelectricity tri-generation for the requirement in the winter, which reduces the heat road difference in the summer and waiter, advances the energy source using efficiency and the economical profit of the thermal power plant.

The invention relates to a high pressure electric potential therapeutic apparatus which can output the asymmetrycomplex wave form. The high pressure electric potential therapeutic apparatus includes a power supply, a functional module, an output control, a high pressure output end, and an irregular wave form generating circuit connected in series between the power supply and the high pressure output end. The irregular wave form generating circuit includes a phase coupling booster transformer (T1) and a wave variable transformer (T2), and three groups of circuits connected in parallel between the secondary order of the wave variable transformer. The high pressure electric potential therapeutic apparatus of the invention, first is provided with a divider resistance and a high voltage diode in series by the high pressure end outputted by the high pressure, to realize the function of high pressure voltage division and attenuation; then, the elementary tandem connection wave variable transformer outputted by the high pressure realizes the addition of waveforms, thereby changing the high pressure outputting wave form. When the human body is cured, due to the abnormity of the electric potential, the physiological function of the human body can not generate the 'adopting' disease, to make the physiatrics used for a long time and maintain better therapeutic effect.

The invention discloses a high-gain bidirectional four-phase DC-DC converter based on a coupling inductor and a control method. The converter comprises the four-phase coupling inductor, eight power switch tubes S1 to S8 and five capacitors CL, C1, C2, CH1 and CH2, wherein the inductance of all phases of the coupling inductor includes inductance L1 to L4, the coupling mode is a positive-negative coupling mode, and that is to say, positive coupling is realized between odd-number phases and between even-number phases of the coupling inductor and negative coupling is realized between the odd-number phases and the even-number phases. The converter has a higher voltage conversion ratio, and the voltage conversion ratio of the converter can be increased to be four times that of a traditional bidirectional four-phase DC-DC converter; the power switch tubes have lower voltage stress, the voltage borne when the power switch tubes S2, S4 and S6 are turned off is one half of the high-voltage sidevoltage, and the voltage borne when the power switch tubes S1, S3, S5, S7 and S8 is one fourth of the high-voltage side voltage.

The invention provides a BP neural network-based multimodal motion method and system of robot fish. The method comprises the steps of building a CPG model; carrying out dynamic modeling on robot fish with pectoral fins at four joints, inhibiting pectoral fin CPGs by tail fin CPGs in a one-way manner, determining left and right input stimuluses, downlink and uplink phase coupling coefficients, uplink and downlink coupling coefficient weights and CPG frequencies corresponding to various joints by using nonlinear oscillator models as CPG neurons; building a BP neural network model; obtaining variations of joint angles on the basis of the CPG model, storing variation values of the joint angles as data packets for carrying out BP neural network training, and transmitting the trained data to a controller of the biomimetic robot fish; and driving swinging of various joints by using CPG signals and carrying out swimming and turning motions of the robot fish. According to the BP neural network-based multimodal motion method and system of the robot fish, multimodal motions of the robot fish are learned by using the BP neural network, so that the target of learning the multimodal motion processes of the robot fish through the BP neural network is finally achieved and the autonomy and the adaptability of a robot fish system are improved.

The invention discloses a high-beam-quality large-scale VCSEL in-phase coupled array and belongs to the field of semiconductor laser unit technology. The high-beam-quality large-scale VCSEL in-phase coupled array is provided with grid electrodes. A proton injection method is adopted to realize electrical isolation between light-out units. When a device operates, the effective refractive index of each light outlet region is lower than the effective refractive index of each interval region, and a special anti-waveguide structure is formed. The grid electrodes in the interval regions further enlarge anti-waveguide refractive index steps, so that in-phase coupling difficulty is lowered. By properly adjusting proton injection depth d and unit spacing, the array satisfies in-phase laser emission conditions, and the in-phase coupled array can be realized. By reasonably designing the array unit spacing and the proton injection depth d, in-phase laser output can be obtained, the beam quality of the array is improved, and the array can be applied to the fields of free space optical interconnection, laser radar, laser printing, optical fiber communication, optical pumping, etc.

Inertial sensors with reduced sensitivity to quadrature errors and micromachining inaccuracies include a gyroscope incorporating two specially-configured single-axis gyroscopes for sensing rotations about two orthogonal axes (the axes of sensitivity) in the device plane, where each single-axis gyroscope includes a resonator having two rotationally-dithered shuttles interconnected by a fork and each shuttle is configured to tilt out-of-plane along a tilt axis perpendicular to the axis of sensitivity and includes corresponding Coriolis sensing electrodes positioned along an axis perpendicular to the tilt axis (i.e., parallel to the axis of sensitivity). The two single-axis gyroscopes may be interconnected, e.g., by one or more in-phase or anti-phase couplings interconnecting the forks and / or the shuttles.

The invention relates to an amplitude modulation method and an amplitude modulation device for a pure-phase spatial light modulator. The method comprises the following steps: acquiring the number Ntotal*Mtotal of pixels of the spatial light modulator, and dividing the pixels into a plurality of sub-areas, wherein the number of pixels in each sub-area is N*M; randomly dividing the N*M pixels into a plurality of 1*2 modulation units; modulating incident light phases of two adjacent pixels in each modulation unit, and performing interference stacking or interference offset on the output light of the adjacent pixels to realize amplitude modulation of each modulation unit; modulating amplitudes between all modulation units on the sub-areas so as to realize modulation of a plurality of gray levels on the spatial light modulator. The amplitude modulation device provided by the invention is realized by using the amplitude modulation method. According to the amplitude modulation method and the amplitude modulation device for the pure-phase spatial light modulator, pure phase modulation and phase coupling-free amplitude modulation can be realized for the pure-phase spatial light modulator, and phase / amplitude-independent combined modulation can also be realized.

The invention provides a transformer with a self interference signal offsetting function and an ultrahigh frequency radio frequency identification device (RFID) receiver front end based on the same. The transformer comprises a normal phase coupling coil, a reverse phase coupling coil and three ports. The receiver front end comprises a conversion switch, a low noise amplifier, the transformer, an active balun, a first mixer, a second mixer, a first outer filter, a second outer filer, a first trans-impedance amplifier, a second trans-impedance amplifier and a phase-locked loop. The conversion switch enables the receiver front end to be converted between a high gain working mode and a low gain working mode. The high gain working mode is that the conversion switch is connected with the low noise amplifier to enable signals to be transmitted to the active balun and a follow-up module through the low noise amplifier. The low gain working mode is that the conversion switch is connected with the transformer to enable the signals to be transmitted to the active balun and the follow-up module through the transformer. The two working modes are separated, in the low gain working mode, a self interference signal offsetting technology based on the transformer is adopted, and the problem of high power carrier signal leakage can be effectively solved.

This invention relates to dynamically controlled, electronic article surveillance (EAS) systems whereby an array of antenna elements is digitally phased and actively driven for concurrent transmission, and digitally phased and combined in the receiver unit to improve detection. In particular, the individual frequency and phase of the plurality of the transmit / receive signals are rapidly varied to allow for automated manipulation (steering) of the transmit field pattern and receive field sensitivity. The invention achieves the following features via means of digital phasing and dynamic computer control: sufficient far-field cancellation, null-free detection and uncompromised detection performance regardless of tag's orientation while using single transmission drivers to drive entire antenna structures, whether loop antenna or ferrite core antenna, using a phase coupler, thereby allowing more efficient system operation or additional features such as deactivator antenna operation.

The invention relates to a rare-earth permanent magnet and a preparation method thereof, which aims to solve the problem of high cost, demanding preparation condition and low magnetism existing in the prior art. The structure of a nanocrystalline two-phase coupling rare-earth permanent magnet provided in the invention is Re-Fe-O / Fe2O3, wherein Re refers to a lanthanide element; and the method for preparing the nanocrystalline two-phase coupling rare-earth permanent magnet comprises the following steps: preparing a precursor firstly by using a soft chemical molecular mixing method, wherein the precursor is a mixture of chelated Re salts and Fe salts; and then carrying out thermal deformation processing on prepared permanent magnetic particles under the conditions that the temperature is 1023 to1273K, the pressure is 20 to 30kNm, and the deformation rate is 50 to 70 percent so as to obtain the nanocrystalline two-phase coupling rare-earth permanent magnet. The invention has the following advantages: the magnetic property of the permanent magnet is higher than that of a common ferrite; the rare-earth content of the raw materials is less and only rare earth oxides are required, therefore, the cost of raw material is low; and the precursors are mixed evenly, and the reaction condition is mild, therefore, the invention has the characteristics of energy conservation and low cost.

A coupled ring oscillator includes n ring oscillators (20) each including m inverter circuits (10), and a phase-coupling loop (40) in which m×n phase-coupling circuits (30), each of which couples signal phases at two points in a certain phase mode, are connected with each other to form a loop. Connection points at which the inverter circuits (10) are connected with each other and the connection points at which the phase-coupling circuits (30) are connected with each other are connected bijectively; and each of the inverter circuits (10) is connected between two points that divide the phase-coupling circuits (30) into two parts at a certain ratio.

The invention discloses a phase coupling reflection grating feedback-based wavelength tunable laser, which comprises an active gain chip and a passive photonic chip, wherein optical waveguides are arranged in the active gain chip and the passive photonic chip respectively; the two chips are coupled and butted with each other through a waveguide core; the waveguide on the passive photonic chip comprises a laser phase control part and a compound waveguide reflecting mirror part; the compound waveguide reflecting mirror part comprises a first reflecting mirror section, a phase coupling section and a second reflecting mirror section; each section is provided with a corresponding electrode for changing the waveguide refraction rate; and by alternatively or simultaneously changing the waveguiderefraction rates of the first reflecting mirror region and the second reflecting mirror region, the distribution wavelength positions of the reflection peaks of the two reflecting mirror regions are changed. Due to the adoption of the wavelength tunable laser, the output wavelength can be continuously or selectively changed, stepped or continuous tuning of the laser output wavelength is realized,and a wide wavelength range can be covered.

An M-phase coupled inductor including a magnetic core and M windings, where M is an integer greater than one. The magnetic core is formed of a core material, and the magnetic core includes a first outer leg forming a first gap. The first gap includes a first gap material having lower magnetic permeability than the core material. Each winding is wound at least partially around at least a portion of the magnetic core, and each winding has a respective leakage inductance. The first gap causes the leakage inductances to be greater than if the first outer leg did not form the first gap. The coupled inductor may be used in a power supply, and the power supply may be used in a computing apparatus.

A numerical simulation method for sand control screen pipe erosion in deep water gas well includes dividing the erosion and wear process into gas-solid two-phase coupling flow and erosion and wear ofsand particle on wall surface according to the erosion and wear mechanism of sand particle on screen pipe. For the gas-solid two-phase coupled flow problem, firstly, the physical model of screen-pipebasin is constructed, because the gravel layer and screen-pipe filter unit are solid porous media, it is simplified to a porous media basin with certain pore throat size, permeability and porosity inthe physical model. Then, the gas-solid coupling motion model is introduced to describe the turbulent flow pattern of two-phase flow, and the two-phase flow field distribution is obtained. For the problem of sand erosion and wear on the screen filter unit, the physical model of screen hole and crevice basin is established, and the wide angle screen pipe erosion model of discrete particles is established. The boundary conditions of gas-solid two phases at the entrance of the screen hole and crevice basin are determined by combining the flow field distribution. The numerical simulation of sand erosion and wear rate is carried out.

The invention relates to a bi-spectrum analysis method based on combination of a circulation modulation frequency spectrum and segmentation mutual correlation. The method comprises steps of calculating a circulation modulation frequency spectrum of a signal to noise ratio hydrophone signal; carrying out Fourier transform on the circulation modulation frequency spectrum to obtain a time domain signal; inputting the time domain signal into a full-phase position digital filter; dividing a filtered signal into multiple segments of mutually correlated bi-spectrums and then carrying out combination;calculating the significance level of the bi-spectrum; taking the significance level as an acceptance region of secondary phase position coupling; calculating to obtain a slice spectrum of a bi-coherent index spectrum; and finally, extracting an axis frequency and harmonic waves of each order of a target subjected to the secondary phase position coupling from the low-frequency band of the slicingspectrum. According to the invention, under the condition of a low signal to noise ratio, the axis frequency and harmonic waves subjected to the secondary phase position coupling in the hydrophone signal can be effectively detected; the method has quite high sensitivity and robustness; and data verification shows that even under the condition of the low signal to noise ratio, the axis frequency and harmonic waves of each order of the target subjected to the secondary phase position coupling can be precisely detected.

A reference image of a pattern having a first pitch and projected on a sample 1 by a projector 6 is captured by a camera 5. Next, a measuring image of a pattern having a second pitch and projected on the sample 1 by the projector 6 is captured by the camera 5. Here, the second pitch of the pattern light is determined by a value calculated based on the phase resolution of the pattern light having the first pitch. Then, using the reference image thus obtained, phase coupling for the measuring image is performed. The three-dimensional shape of the sample is obtained in this manner.

The invention provides a squint InSAR ground moving target detection method based on rotatable forward-looking array. The method includes the steps of adding a servo rotary bench to the rear end of a radar radio frequency portion, controlling the angle theta a between an SAR system baseline and the vertical direction, making the baseline, track and wave beam central direction on a same plane by rotatably installing the SAR system, making the forward-looking array of the vertical baseline equivalent to an along-track multi-channel SAR system with the equivalent baseline length being Btana, receiving target echo signals, and estimating the target speed and position according to the equivalent baseline length Btana. The angle between the baseline and an imaging plane is configured by rotating one-dimensional track array, thereby solving the problem of target height and speed interference phase coupling. Fewer elements are needed, and the signal processing method is simple. The method is applicable to suppressing complex terrain clutters and has high practical engineering valve.

The invention discloses a near-threshold low-power-consumption quadrature voltage controlled oscillator. The voltage controlled oscillator comprises an oscillator main body circuit and a self-detection bias circuit, wherein a phase coupling circuit in the oscillator main body circuit and a peak value detection circuit in the self-detection bias circuit are combined, so that current is multiplexed, and the power consumption is lowered. The near-threshold low-power-consumption quadrature voltage controlled oscillator works under a relatively high bias voltage at the beginning of oscillation start, and oscillation of the circuit can be started rapidly under large current. After oscillation start, four PMOS (P-channel Metal Oxide Semiconductor) transistors limit phase differences among four paths of oscillation signals at 90 degrees, detect a peak voltage and control the bias circuit to lower a bias point, so that the power consumption is lowered, and the noise performance is optimized.

The invention discloses a lightning arrester resistive current and capacitive current transient value measuring method which includes that leaked current sampling values of a three-phase lightning arrester grounding down lead at all sampling times and high voltage side voltage sampling values of an A-phase lightning arrester at all sampling times are collected; phase angle of fundamental frequency voltage of high voltage side voltage of the A-phase lightning arrester, amplitude valueof fundamental frequency voltage, phase angle of tertiary voltage harmonic wave and amplitude value of tertiary voltage harmonic wave are calculated in a Fourier algorithm; influences of tertiary voltage harmonic wave and inter-phase coupling capacitance are considered, and transient values of capacitive current and resistive current in leaked current of the three-phase metallic oxide lightning arrester are obtained through calculation. According to the lightning arrester resistive current and capacitive current transient value measuring method, influences of tertiary voltage harmonic wave and inter-phase coupling capacitance are considered on a mathematical model, accurate measurement of the transient process of resistive current and capacitive current in leaked current of the three-phase lightning arrester is achieved, insulating property monitoring time points of the three-phase lightning arrester are shortened to all the sampling times, and reliable basis is provided for finding lightning arrester insulating property dynamic change conditions and fast making lightning arrester overhaul schemes.

A staggered parallel-connection direct-current voltage reduction converter with a phase-by-phase coupled inductor of the invention comprises power switch tubes, a filtering capacitor and a coupled inductor possessing n windings. In the coupled inductance windings, a first phase inductance winding is coupled with a second phase inductance winding; the second phase inductance winding is coupled with a third phase inductance winding; an n-1th phase inductance winding is coupled with an nth phase inductance winding; the nth phase inductance winding is coupled with the first phase inductance winding; except the first phase inductance winding and the nth phase inductance winding, a mth phase inductance winding is only coupled with a m-1th phase inductance winding and a m+1th phase inductance winding and is not coupled with other windings; the first phase winding is only coupled with the second phase winding and the nth phase winding, and the nth phase winding is only coupled with the first phase winding and the n-1th phase winding. An array-type magnetic core is used to realize phase-by-phase coupling of n phase coupled inductance windings. Through designing an inductive coupling coefficient and controlling conduction time of a main switch tube, an output current ripple of the converter is reduced and dynamic response is increased.

The invention relates to an array antenna wave beam shaping system and a wave beam scanning method thereof. The system comprises at least two antenna arrays, each antenna array comprises two antenna subarrays in anti-phase coupling, signals of the antenna arrays are weighted, vector composition is carried out on the weighted signals, and an antenna wave beam is obtained. The signal weighted values of the antenna arrays are changed to realize antenna wave beam scanning.