22 results about "Wave oscillation" patented technology

The invention relates to a seabed elastic parameter inversion method, system and device under an earthquake spherical reflection wave oscillation-gradual change nuclear decoupling framework, and belongs to the field of geophysical detection and acoustic detection. The method comprises the following steps: (1) inputting observation data and initializing seabed elastic parameters; (2) determining an integral interval and decomposing the integral interval into a plurality of sub-intervals; (3) calculating an oscillation nuclear local integral matrix corresponding to the incident angle of the observation data; (4) calculating a slowly-varying kernel local mean vector; (5) calculating a spherical wave reflection coefficient of oscillation-gradual change kernel decoupling; and (6) constructing a target function by using the decoupled spherical wave reflection coefficient, and solving the target function. In the objective function solving process, only the steps (4) and (5) need to be repeatedly executed after the seabed elastic parameters are updated, the oscillation nuclear local integral matrix in the step (3) does not need to be repeatedly calculated, redundant calculation about oscillation nuclear integration is avoided, and the calculation efficiency is improved.

The invention discloses a high-speed maglev train suspension constraint control method for coping with long-wave oscillation of a track beam, and belongs to the field of maglev track traffic. The method comprises the following steps: dynamically expanding high-speed maglev train model prediction suspension control under asymmetric preset performance constraints, and coping with safety constraint control of accurate suspension of the high-speed maglev train with long-wave oscillation of a track beam: establishing a track model of the long-wave oscillation of the track beam; designing the precise suspension dynamic expansion asymmetric preset performance constraint of the high-speed maglev train according to the long-wave oscillation information of the track beam; designing a high-speed maglev train suspension air gap mathematical model containing track beam long-wave oscillation information; obtaining a state space expression based on a reconstruction error according to the dynamic expansion asymmetric preset performance constraint and the conversion error; a prediction model is obtained through the expression, an optimal control problem is designed, and an optimal solution is solved; on the premise that the track beam oscillation reference air gap tracking precision is improved, suspension deadlock of the high-speed maglev train under long-wave oscillation of the track beam is avoided, and it is ensured that the high-speed maglev train runs safely in a small suspension gap with low power consumption under long-wave oscillation of the track beam.

A slow-wave structure, a traveling wave tube, an electronic device, and a communication system are provided. The slow-wave structure includes a folded waveguide structure, where the waveguide structure has a cycle in a longitudinal direction and an amplitude in a transverse direction perpendicular to the longitudinal direction, and at least one of an amplitude of a first part of the waveguide structure and a cycle of the first part gradually changes in the longitudinal direction. Therefore, reflection of the slow-wave structure can be reduced, backward wave oscillation can be effectively suppressed, and a wider operating bandwidth can be obtained.

A method for improving cerebrospinal fluid clearance through a glymphatic system, while a patient is sleeping, resting, or a combination thereof, the method comprising measuring ultrasound data with one or more ultrasound emitters and extracting B-wave oscillations from the ultrasound data.

The invention relates to a W-band low-noise voltage-controlled oscillator based on a transformer resonant cavity and harmonic extraction. The W-band low-noise voltage-controlled oscillator comprises a dual-core in-phase coupled oscillator core, a two-bit switched capacitor bank, a linear variable capacitor bank and an output buffer, the dual-core in-phase coupled oscillator core comprises a transformer resonant cavity and a harmonic extraction network, a fundamental wave oscillation signal is generated in the transformer resonant cavity and is coupled and output to the output buffer, and a high-power second harmonic oscillation signal is generated in the harmonic extraction network and is output as a target oscillation signal; the two-bit switched capacitor bank adopts an HBT switch with excellent high-frequency performance, the tuning range of the oscillator is divided into four sub-bands, and the tuning gain is reduced; the capacitance value of the linearized variable capacitor bank is linearly changed along with the tuning voltage height, and a conversion mechanism of flicker noise is inhibited; and the output buffer realizes load isolation and buffering of the fundamental wave oscillation signal. The voltage-controlled oscillator has low tuning gain and high output power in the W wave band, and excellent phase noise is achieved.

This invention discloses a slow-wave structure and circuit suitable for high-order modes, including a housing, an upper gate extending from the top wall to the bottom wall of the housing, and a lower gate extending from the bottom wall to the top wall of the housing. Multiple upper and lower gates are staggered, defining multiple periodic vacuum cavities. The upper and lower gates have different heights along the height direction of the slow-wave structure. An electron beam channel is formed between the upper and lower gates. This invention can suppress low-order mode competition and back-wave oscillations at low operating voltages, achieving stable operation in high-order modes and achieving high output power of 100W or more with low voltage.

The present application relates to a kind of seabed elastic parameter inversion method, system and device under the oscillation-slowly varying nuclear decoupling framework of seismic spherical reflection wave, belong to geophysical prospecting, acoustic detection field.The method includes the following steps: (1) input observation data and initialize seabed elastic parameter;(2) determine integration interval and decompose integration interval into several sub-intervals;(3) calculate the local integral matrix of oscillation kernel corresponding to the incidence angle of observation data;(4) calculate the local mean vector of slowly varying kernel;(5) calculate the spherical wave reflection coefficient of oscillation-slowly varying nuclear decoupling;(6) decoupled spherical wave reflection coefficient is used to construct objective function and solve.In the process of solving objective function, only need to repeat "step (4) (5)" after updating seabed elastic parameter, without repeating the calculation of oscillation kernel local integral matrix in step (3), avoid the redundant calculation about oscillation kernel integration, improve the calculation efficiency.

The invention belongs to the technical field of sleep regulation and control, and aims to provide a sleep regulation and control method and system based on closed-loop sound stimulation. Through phase tracking and phase compensation, the slow wave rising state can be accurately locked, millisecond-level synchronization of sound stimulation and brain slow wave oscillation can be achieved, compared with a traditional scheme only based on amplitude triggering, the physiological matching performance of sound stimulation can be remarkably improved, and the problem that stimulation and endogenous rhythm are not synchronous is fundamentally solved. According to the invention, slow wave phase locking can be realized, sound stimulation can be applied to a user at an optimal phase point, delay compensation capability is provided, and accurate control of sleep regulation can be realized.

The present invention discloses a magnetically tuned class-F voltage-controlled oscillator based on multi-coil coupling, comprising: a class-F oscillation loop, for generating an oscillation signal of a desired frequency and performing harmonic adjustment on the spectrum of the oscillation signal; a magnetically tuned transformer, for adjusting the voltage-current relationship of the oscillation signal in the class-F oscillation loop, changing the equivalent inductance value in the class-F oscillation loop, and thereby adjusting the oscillation frequency; and a common-mode resonant capacitor, for determining the common-mode capacitance in the class-F oscillation loop, and further reducing phase noise at the second harmonic through common-mode resonance. The present invention uses a class-F voltage-controlled oscillator to enhance harmonics to achieve frequency tripling to generate a millimeter-wave oscillation signal, and uses magnetic tuning to replace a low-quality-factor varactor to control and change the resonant frequency. Compared with a traditional LC voltage-controlled oscillator, the voltage-controlled oscillator of the present invention can obtain lower phase noise and higher quality factor, and eliminates the need for an additional frequency multiplier for generating millimeter-wave oscillation signals.

The utility model relates to an automatic adjustment power ultrasonic system, including power supply module, co-frequency drive circuit, ultrasonic oscillation circuit and sampling circuit, power supply module includes chip U8, chip U24, diode D6, diode D25 and inductor L8, co-frequency drive circuit includes chip U19, MOS transistor VT37, resistor R106, resistor R110 and resistor R119. The ultrasonic oscillation circuit comprises a triode VT32, a diode D36, a capacitor C125 and a capacitor C133. According to the utility model, the power can be automatically adjusted to a set value range, no special requirement on the transducer exists, the loss of a finished product can be greatly reduced, and meanwhile, the corresponding power adjustment is carried out along with the environment and the heating temperature of the transducer, so that the safety problem caused by overheating is prevented. And the abnormal power of the transducer can be automatically detected, so that the MCU can respond in time. The power output precision can be improved, the loss of finished products is reduced, the quality is improved, and the product safety is improved.

The invention discloses a wave impact intelligent locking protection method and system based on artificial intelligence, and belongs to the technical field of wave energy. Collecting wave oscillation waveform data, identifying wave crest time nodes, dividing time periods, monitoring a reciprocating vibration state of a vibration body and fitting a waveform; extracting a negative vibration characteristic waveform, and quantifying the observation sampling frequency of the pressure monitoring sensor; capturing a load pressure value and a time node at a negative half waveform trough, and constructing a dual-scale wavelet window model to quantify a high-frequency energy degree; load sampling frequency is calculated based on the high-frequency energy degree, and the sampling frequency is calibrated through the intelligent locking protection model and fed back to the sensor. According to the method, the time domain and energy domain characteristics of the vibration frequency are combined, the problems that in the prior art, a sampling strategy is rigid, characteristic analysis is one-sided, and a calibration mechanism is lacked are effectively solved, and the adaptability and efficiency of intelligent locking protection in the wave impact environment are improved.

The utility model discloses a slurry ultrasonic dispersion device which comprises a base and a bearing cylinder installed on the base, a dispersion mechanism is arranged on the base, an oscillation mechanism is arranged at the bottom of the bearing cylinder, and the dispersion mechanism comprises a servo air cylinder, a pushing plate, a first rotating motor, a rotating shaft, a U-shaped stirring paddle, an ultrasonic generator, a connecting line and an ultrasonic vibration rod. And the oscillating mechanism comprises a rotating motor II, an oscillating shaft, an eccentric wheel, two groups of guide rods, an oscillating seat and a guide wheel. The device has the beneficial effects that the dispersing mechanism is arranged on the base, the U-shaped stirring paddle is used for stirring the slurry in the bearing cylinder, and the reinforcing agent is completely dispersed in the slurry by virtue of the ultrasonic vibration rod by virtue of overshoot wave oscillation, so that the impact-resistant slurry is obtained, and the vibration seat of the vibration mechanism is used for driving the bearing cylinder to vibrate; therefore, the dispersion effect is improved.

The invention relates to the technical field of biomedical signal processing and intelligent wearable equipment, and discloses a real-time electroencephalogram-based closed-loop targeted memory reactivation system and method.The system comprises a wearable equipment body, an electroencephalogram sensing module, a central processing unit and an audio playing module, and the electroencephalogram sensing module collects electroencephalogram signals of a user in real time; the central processing unit is used for processing the electroencephalogram signals, including sleep staging, feature recognition and decision triggering; the audio playing module plays the memory-related audio clues under specific conditions. The system accurately locates a'golden window period 'of memory consolidation by identifying a time phase coupling relationship between slow wave oscillation and sleep spindle waves in sleep to realize targeted intervention of closed-loop control, and the system further comprises a non-stress period setting module, a self-adaptive adjusting module and a multi-mode physiological sensing module, realizes full-automatic, accurate and interference-free memory enhancement, and has a good application prospect. Compared with the prior art, the method has the remarkable advantages of accuracy, no interference and high efficiency.

The application belongs to the technical field of medical apparatus and instruments, in particular to a ring radiator and an ultrashort wave therapy machine based on the ring radiator. The ring radiator comprises a main box, a container cabinet is slidably connected to the front bottom of the main box, an open capacitor mechanism is connected to the inner bottom wall of the container cabinet, the open capacitor mechanism comprises a cover plate A attached to the bottom surface of the container cabinet, the open capacitor mechanism can still maintain the vertical relationship of the electric field and the magnetic field required by the TEM mode and their distribution characteristics in space, the resonant cavity can still maintain stable TEM mode electromagnetic wave oscillation and related electromagnetic functions, and the ultrashort wave energy can be better absorbed by the diseased tissue through the stable electromagnetic wave oscillation. The ultrashort wave energy can make the diseased part produce more intense vibration and generate more heat under the oscillation of the resonant cavity at a specific frequency, promote local blood circulation, enhance the working capacity of white blood cells, help eliminate soreness, avoid the reduction of energy reaching the lesion, and affect the treatment effect.

The application discloses a wave impact intelligent locking protection method and system based on artificial intelligence and belongs to the technical field of wave energy. Wave oscillation waveform data is collected, a wave peak time node is identified and time periods are divided, a vibration body reciprocating vibration state is monitored and a waveform is fitted; a negative vibration characteristic waveform is extracted, an observation sampling frequency of a pressure monitoring sensor is quantified; a load pressure value and a time node at a negative half-wave form trough are captured, a double-scale wave window model is constructed to quantize high-frequency energy degree; a load sampling frequency is calculated based on the high-frequency energy degree, the sampling frequency is calibrated through an intelligent locking protection model and is fed back to the sensor. The application combines time domain and energy domain characteristics of a vibration frequency, effectively solves the problems of rigid sampling strategy, one-sided feature analysis and missing calibration mechanism in the prior art, and improves the adaptability and efficiency of intelligent locking protection under a wave impact environment.

The present invention provides a structure that improves radiation efficiency of terahertz waves. The present invention comprises: an AC generation source; a first electrode and a second electrode that are stacked so as to have the AC generation source interposed therebetween to apply voltage and current to the AC generation source, the second electrode having a smaller area than the first electrode; and a constricted portion that is electrically connected to at least one of the first electrode and the second electrode, the constricted portion being more constricted than the at least one of the first electrode and the second electrode to which the constricted portion is connected.

This invention provides a method for oscillation simulation testing, implemented using a wave compensation test bench. The wave compensation test bench includes a first oscillation device, a second oscillation device, and a lifting device. The lifting device is mounted on the second oscillation device, and the second oscillation device is mounted on the first oscillation device. The first oscillation device drives the lifting device to oscillate along a first oscillation direction, and the second oscillation device drives the lifting device to oscillate along a second oscillation direction. The lifting device moves up and down along a third movement direction. The first oscillation direction, the second oscillation direction, and the third movement direction are perpendicularly arranged. The oscillation in the first oscillation direction, the second oscillation direction, and the third movement direction enable the lifting device to move in three different directions, while the first oscillation direction, the second oscillation direction, and the third movement direction are perpendicularly arranged. Therefore, the lifting device can move along the X-axis, the Y-axis, and the Z-axis, thereby simulating wave oscillation.

According to the airfoil structure for improving the performance of the large-attack-angle NACA0012 airfoil through suction surface traveling wave type oscillation, when the included angle between the airfoil and incoming flow is larger than or equal to 15 degrees, the suction surface of the airfoil is a traveling wave type suction surface, and by arranging alternate wave crests and wave troughs on the suction surface, an air boundary layer is changed into turbulent flow from laminar flow in advance, so that the performance of the large-attack-angle NACA0012 airfoil is improved, and the performance of the large-attack-angle NACA0012 airfoil is improved. Therefore, separation of a fluid boundary layer is delayed, and the aerodynamic performance of the airfoil is improved. And the amplitude of the traveling wave type suction surface is firstly increased and then decreased in the direction from the front edge of the airfoil profile to the tail edge of the airfoil profile. Continuous energy is provided for the boundary layer through traveling wave type oscillation, and separation of the boundary layer at the large attack angle is effectively restrained.

[Task] Providing a robot and robot control method by which vibrations of a shaft can be suppressed. [Solution] A robot comprises a robot arm, a shaft supported on the robot arm and moving linearly along a central axis relative to the robot arm, a hand attached to the front end section of the shaft, a first inertial sensor located on the robot arm and measuring inertia in a direction perpendicular to the central axis, a second inertial sensor located on the hand or shaft and measuring inertia in a direction perpendicular to the central axis, drive components for driving the robot arm, and a control component for controlling the drive components, wherein the control component, based on an output from the first inertial sensor, subjects the drive component to feedback control and, based on an output from the second inertial sensor, determines whether vibrations of the shaft are in a normal or abnormal state.where the conditions for feedback control in the case of the abnormal state are distinguished from those in the case of the normal state.

Traveling wave oscillator system (RTWO system) which features the following: a first RTWO ring designed to guide a traveling wave; several selectable capacitors distributed around the first RTWO ring, each of the several selectable capacitors being operable in a selected state and a non-selected state; and a decoder system configured to control the selection of several selectable capacitors based on a frequency tuning code having a fine tuning code and a coarse tuning code, wherein the decoder system is configured to operate a constant number of capacitors that switch the state for each value of the fine tuning code.

The application discloses a pipeline descaling device and method based on an electromagnetic wave method of irregular modulation frequency, and the method comprises the following steps: generating a cyclically changed basic frequency F0; using a microprocessor ADC to sample a suspended pin to generate a random number and calculate a random variable frequency Delta F; superimposing F0 and Delta F to generate an irregular modulation frequency F; and generating a high-frequency pulse modulation electromagnetic wave according to F to control an electromagnetic wave oscillation circuit, and radiating the electromagnetic wave to water through a pipeline to perform descaling. The device comprises a microprocessor module, an electromagnetic wave oscillation circuit, an indicator lamp and a power module. The electromagnetic wave oscillation circuit is composed of a triode, a capacitor and a magnetic bar to form an RLC oscillation circuit, and one end of a magnetic bar secondary coil is connected to a descaled metal pipeline. The application prevents water ions from producing adaptability through the irregular modulation frequency, improves the long-term stability of the descaling effect, and has the advantages of simple structure, low cost and good descaling effect.

The utility model discloses a crank connecting rod device capable of generating standard sine wave oscillation, which comprises a mounting plate, a wing-shaped piece and a turntable are rotatably connected on the mounting plate left and right at intervals, the turntable is provided with a rotating motor, a linkage component is connected between the turntable and the wing-shaped piece, and a turntable sliding block is eccentrically and rotatably connected on the turntable. The linkage assembly comprises a first sliding rail, a third sliding rail and a second sliding rail, the first sliding rail and the third sliding rail extend front and back, the second sliding rail extends left and right, one end of the second sliding rail and the first sliding rail are fixed together, a rotating disc sliding block is eccentrically and rotationally connected to the rotating disc, and the first sliding rail is slidably connected to the rotating disc sliding block; the second sliding rail is provided with a fixed sliding block, the fixed sliding block and the mounting plate are fixed together, and the second sliding rail is connected to the fixed sliding block in a sliding mode; the third sliding rail is fixed to the airfoil-shaped piece, an airfoil-shaped sliding block is connected to the third sliding rail in a sliding mode, and the other end of the second sliding rail is rotationally connected with the airfoil-shaped sliding block. Standard sine wave motion can be generated, and the accuracy of sine wave swing of the airfoil is improved.