104 results about "Constant waveform" patented technology

Methods, systems, and devices for wireless communications are described. A wireless communication device may receive, via a first radio frequency spectrum band, a control message that includes an uplink grant for sending one or more backscattered uplink messages via a second radio frequency spectrum band that is higher than in frequency than the first radio frequency spectrum band and separated from the first radio frequency spectrum band by at least a threshold frequency gap. The wireless communication device may then receive a continuous waveform via the second radio frequency spectrum band, and modulate the continuous waveform with uplink data of the one or more backscattered uplink messages. The wireless device may then send, via the second radio frequency spectrum band, a backscattered signal of the continuous waveform based on modulating the continuous waveform with the uplink data.

The invention discloses a seismic surface wave array tomography method, a storage medium and equipment, and relates to the technical field of surface wave tomography, and the method comprises the steps: calculating a cross-correlation function between all seismic station pairs according to continuous waveform data recorded by seismic stations; determining the size of the sub-array according to the distance and the number of the seismic stations; processing all the cross-correlation functions in each sub-array by using linear Radon transform to obtain a frequency dispersion curve of each sub-array; respectively moving the positions of the sub-arrays according to a certain step length along the horizontal direction and the vertical direction, and obtaining frequency dispersion curves of the sub-arrays at other positions by using linear Radon transformation; and taking the frequency dispersion curves of different sub-arrays as input data, and constructing a phase velocity value of each grid point in the research area by using a seismic array tomography method. According to the scheme of the invention, the imaging resolution of a seismic array processing technology can be improved.

The invention discloses an exhaust valve self-adaptive noise reduction method based on environmental noise recognition, and belongs to the technical field of exhaust valve data noise reduction. The problem that noise reduction parameters of an exhaust valve cannot be automatically generated according to the actual environment noise condition at present, and then signals cannot be effectively processed is solved. The method comprises the following steps: acquiring a noisy exhaust valve audio signal, preprocessing and standardizing the signal, then sending the signal into a deep learning model for identification to obtain an environment category of a valve audio, and acquiring a binary mask corresponding to a prior environment category according to the environment category; performing short-time Fourier transform on the preprocessed audio to obtain a frequency amplitude spectrum Yn (f) and a phase phi n (f) of a signal; and performing point-by-point multiplication operation on the Yn (f) and a binary mask Mv (f) corresponding to an environment category to obtain a signal, and performing inverse STFT based on the phase phi n (f) to recover a time domain signal # imgabs0 # to synthesize a continuous waveform through an overlap-add method.

The invention relates to the technical field of continuous wave soldering, in particular to selective continuous wave soldering equipment based on electronic components, which comprises a base, a conveying unit, a soldering unit, a guide component and an auxiliary component. According to the welding device, firstly, the upper die base and the lower die base are closed and locked, a welding area is accurately opposite to the nozzle by means of the guide assembly, the welding quality and welding efficiency of follow-up welding are ensured, and batch rapid production is facilitated; the upper die base and the lower die base serve as first-stage covering protection, and the guide assembly limits the height of the nozzle; the tin solution is cooled before welding to form second-stage temperature protection, then third-stage protection is formed by means of nitrogen filling in in the welding process, fourth-stage protection is formed through preheating and cooling protection in the auxiliary assembly, in conclusion, through the four-stage temperature protection, the problem that components are damaged due to high temperature is solved, and the welding quality is improved.

The invention provides a prediction model training method, an earthquake prediction method and device and electronic equipment, and relates to the technical field of earthquake monitoring and earthquake prediction. The training method comprises the steps that multiple pieces of aftershock data in historical seismic waveform data of a target area are synthesized with preset noise data, and an earthquake precursor data set is obtained; intercepting a plurality of continuous waveform data containing small seismic group events from the historical seismic waveform data to obtain a random event data set; determining a noise data set by generating a white noise sequence or selecting waveform data of a plurality of noise segments of which the magnitude is below a preset seismic magnitude from historical seismic waveform data; and training the neural network by using the earthquake precursor data set, the random event data set and the noise data set to obtain an earthquake prediction model. According to the invention, the recognition precision of earthquake precursor anomalies is improved.

Methods, systems, and devices for wireless communications are described. In some examples, an ambient internet of things (AIoT) device may receive a continuous waveform from a radio frequency (RF) source, where the continuous waveform may be associated with first transmission power. The AIoT device may also receive a forward link message from a reader of the AIoT device, where the forward link message triggers the AIoT device to transmit a backscattered signal of the continuous waveform. In response to receiving the continuous waveform and the forward link message, the AIoT device may transmit, to the reader, signaling indicating that an energy level of the AIoT device is insufficient to transmit the backscattered signal. In such examples, the reader may trigger one or more repetitions of the forward link message, a modified version of the continuous waveform, or a second continuous waveform to be sent to the AIoT device.

The present invention specifically relates to a motor U-shaped flat wire continuous wave winding flexible forming equipment and forming method, the device includes: a grasping device, a rotary clamping cylinder, a linear bearing, an X-axis servo electric cylinder, a Y-axis servo electric cylinder and a forming die, and the above components are all fixedly connected to the workbench; the grasping device is placed on one side of the workbench; the rotary clamping cylinder and the X-axis servo electric cylinder are arranged opposite to each other, the output end of the rotary clamping cylinder is fixedly connected to the left dynamic clamp, the output end of the X-axis servo electric cylinder is fixedly connected to the slide, and the bottom of the slide is fixedly connected to the top of the linear bearing; the slide is provided with a right static clamp and a clamping cylinder, the output end of the clamping cylinder is provided with a right dynamic clamp, and the right static clamp and the right dynamic clamp are arranged opposite to each other; the Y-axis servo electric cylinder, the forming punch and the forming die are arranged between the rotary clamping cylinder and the slide, the forming punch is arranged at the output end of the Y-axis servo electric cylinder, and the forming punch and the forming die are arranged opposite to each other.

The embodiment of the invention discloses a stator winding and a motor. The stator winding comprises a plurality of winding branches, wherein each winding branch comprises a wire inlet end and a wire outlet end; wherein the number of winding layers of the winding branches is multiple, the winding branches conduct winding in the stator grooves, the winding mode of the winding branches is a continuous wave winding mode, and the stator grooves at the wire inlet end and the wire outlet end of each winding branch are different stator grooves. According to the stator winding and the motor provided by the embodiment of the invention, the problem of imbalance of inter-phase current can be solved, and the output efficiency is improved.

Methods, systems, and devices for wireless communication are described. A first wireless device may receive, from a second wireless device, a first frequency modulated continuous waveform (FMCW) signal via an orthogonal frequency division multiplexing (OFDM) channel. The first wireless device may generate a second FMCW signal based on a set of FMCW parameters associated with the first FMCW signal. The first wireless device may combine the first and second FMCW signals and filter the combined FMCW signal. The first wireless device may sample the combined and filtered FMCW signal in a time domain. The first wireless device may estimate the frequency domain OFDM channel based on sampling the combined and filtered FMCW signal. The first and second wireless devices may communicate OFDM signals via the OFDM channel based on the estimation of the frequency domain OFDM channel.

Continuous waveforms for driving a four-particle electrophoretic medium including four different types of particles, for example a set of scattering particles and three sets of subtractive particles. Methods for identifying a preferred waveform for a target color state or a target transition when using a continuous or quasi-continuous voltage driver / controller.

The invention discloses an overload protection method for controlling an electric machine tool by using a current sum value. The method comprises the following steps: setting a constant value D1 in a control system; the current value of the motor during operation is detected, the current value is a continuous wave-shaped current waveform, and the current values of the single first working process and the single second working process are combined into a waveform unit in the current waveform; adding the current wave peak values of the second working process in the two adjacent waveform units in the unit time to obtain a sum value D2, and comparing the sum value D2 with the fixed value D1; when the sum value D2 is larger than the fixed value D1, the control system controls the motor to stop; and when the sum value D2 is smaller than or equal to the fixed value D1, the electric machine tool continues to run, the program for detecting the current value of the motor and comparing the current value is executed again, the problem that the machine is damaged due to the fact that the machine still runs when the electric machine tool is overloaded is solved through the method, and the overload protection effect on the grease gun which is not detected by the pressure sensor can be achieved.

Methods, systems, and devices for wireless communications are described. A wireless communication device may receive, via a first radio frequency spectrum band, a control message that includes an uplink grant for sending one or more backscattered uplink messages via a second radio frequency spectrum band that is higher than in frequency than the first radio frequency spectrum band and separated from the first radio frequency spectrum band by at least a threshold frequency gap. The wireless communication device may then receive a continuous waveform via the second radio frequency spectrum band, and modulate the continuous waveform with uplink data of the one or more backscattered uplink messages. The wireless device may then send, via the second radio frequency spectrum band, a backscattered signal of the continuous waveform based on modulating the continuous waveform with the uplink data.

The present application provides a heat exchange apparatus and an air conditioning apparatus. The heat exchange apparatus comprises a heat exchange member and refrigerant pipes. The heat exchange member comprises a first flat portion, a second flat portion, and a first spacing portion. The first flat portion is provided with a plurality of through holes spaced apart in a first direction, and each refrigerant pipe penetrates through a through hole. The first flat portion and the second flat portion are respectively connected to two opposite sides of the first spacing portion in a second direction. The second flat portion and the first flat portion continuously extend in the first direction. The first spacing portion extends in a continuous wave shape in the first direction. The second direction intersects with both the axis of each through hole and the first direction. In this way, the defrosting efficiency of the heat exchange apparatus can be effectively improved.

The present application discloses an anti-false wave method for an ultrasonic flowmeter and an ultrasonic flowmeter. The method includes: setting an initial threshold; obtaining, according to the initial threshold, the peak value of the steady-state sine wave and the amplitudes of a plurality of consecutive waveforms that exceed the initial threshold and are before the steady-state sine wave from the first echo signal, including: the first wave and the adjacent waveforms after the first wave; calculating a first preset value according to the peak value of the steady-state sine wave of the first echo signal and the amplitudes of the plurality of waveforms; obtaining a second preset value of the second echo signal according to the initial threshold; obtaining a second threshold according to the ratio of the second preset value to the first preset value; obtaining the first wave of the third echo signal according to the second threshold. By calculating the ratio of the first preset value of the first echo signal to the second preset value of the second echo signal, and adjusting the initial threshold according to the ratio to obtain the second threshold, the logic is simple, which is conducive to real-time calculation, can avoid the influence of false waves, reduce the influence of interference on the measurement result, and improve the measurement accuracy.

The invention discloses a pressure balancing part for a continuous wave mud pulse generator, and relates to the technical field of underground drilling tool equipment. The device comprises an axially telescopic transmission shaft piece and an auxiliary transmission piece, the auxiliary transmission piece is fixed on a mounting sleeve of the pulse generator, a rotary valve of the pulse generator is connected to a telescopic shaft of the transmission shaft piece, and the telescopic shaft of the transmission shaft piece penetrates through the rotary valve to be connected with the auxiliary transmission piece. A rotary valve rotor of the rotary valve is fixedly connected with a telescopic shaft of the transmission shaft piece, and a rotary valve stator is rotationally connected with the rotary valve rotor; when the transmission shaft piece drives the rotary valve rotor to rotate relative to the rotary valve stator, the telescopic shaft drives the rotary valve to integrally move in the axial direction of the mounting sleeve under the connection matching of the telescopic shaft of the transmission shaft piece and the auxiliary transmission piece. In the slurry throughput change process of the rotary valve, the rotary valve is made to make adaptive movement along the rotating axis of the rotary valve through the cooperation effect of the transmission shaft piece capable of stretching and retracting in the axial direction and the auxiliary transmission piece, so that the pressure at the position of the rotary valve is dynamically balanced.

The present application relates to the technical field of power cable, in particular to a kind of cable installation device for overhead line based on tension self-balancing.The cable is externally provided with inner sheath, the outer surface of the inner sheath is provided with outer sheath, and the one end of the cable is provided with fixing mechanism, and the fixing mechanism is used to fix the cable on the telegraph pole.The present application is provided with a plurality of tooth protrusions which are uniformly distributed on the outer surface of the inner sheath, so that a continuous wave-shaped structure is formed between the tooth protrusions and the tooth groove, and a metal clamping strip is additionally provided to further enhance the surface strength of the inner sheath, and the locking teeth and the clamping block are cooperated with each other to uniformly disperse the stress at the clamping plate to the tooth groove and the metal clamping strip.Meanwhile, the inner sheath is synchronously locked by the locking plate and the second locking assembly, so that the stress distribution on the surface of the inner sheath is further dispersed, and the risk of fracture of the inner sheath is reduced.

The present invention discloses an artificial intelligence-based template matching earthquake detection method, and the steps include: extracting effective seismic phase data by using a deep learning detection model; using the effective seismic waveform as a machine-detected seismic waveform template; intercepting the artificial seismic monitoring waveform as an artificially-detected seismic waveform template; jointly building a template seismic waveform library; obtaining the template waveforms of each seismic phase; intercepting the continuous waveform data suspected of having an earthquake event as the continuous waveform to be detected, and performing matching calculations between the continuous waveform to be detected and the template waveforms of each seismic phase of each seismic waveform template in the template seismic waveform library. By performing matching calculations between the continuous waveform to be detected and the template waveforms of each seismic phase of each seismic waveform template in the template seismic waveform library, the template matching earthquake detection method can quickly and accurately identify and judge the continuous waveform to be detected, so as to quickly determine whether there is an earthquake event in the continuous waveform to be detected.

The invention provides an underground continuous pressure wave generating device. The underground continuous pressure wave generating device comprises a rotary valve body, a driving motor and a speed reducer, the rotary valve body comprises a stator, a rotor and a rotary shaft. The driving motor drives the speed reducer, the rotating shaft and the rotor to rotate; the stator is mechanically connected with a shell of the continuous wave pulser and rotates along with the rotation of the drill rod; the front ends of valve ports of the stator and the rotor are designed according to a theoretical curve, and curves of the front ends of the valve ports of the stator and the rotor are designed by combining a fluid dynamics simulation analysis technology and a correlation algorithm; the distance between the stator and the rotor relative to the fluid inflow direction is an axial gap, and a radial gap is arranged in the radial direction. By adopting the scheme, the problems of high blocking risk and serious pressure wave signal loss in the prior art are solved, the stator and rotor valve port curve is optimally designed by utilizing the relevancy algorithm, the influence of the axial clearance and the radial clearance on the pressure wave is comprehensively considered to generate the high-quality continuous sine pressure wave, and support is provided for efficient and lossless transmission of underground data.

Techniques for wireless communication are disclosed. Aspects of the present disclosure relate to PC-FMCW based MIMO sensing operations. In an aspect, an NB phase code scrambling sequence may be associated with different MIMO antenna ports, where the FMCW for each MIMO antenna port is multiplied by the associated NB phase code scrambling sequence for that MIMO antenna port to produce a PC-FMCW. Then, as part of a MIMO sensing operation, each MIMO antenna port may transmit its respective PC-FMCW. Other aspects of the present disclosure relate to the communication of a MIMO sensing capability indication that can be used to determine a sensing configuration for MIMO sensing operations.

Disclosed is an apparatus that floats at the surface of a body of water over which waves pass. Passing waves cause a nominally vertical axis of the apparatus to tilt away from an axis normal to the resting surface of the body of water. Tilting of sufficient magnitude and duration allows a fluid to flow through a channel that in an un-tilted apparatus would require the gravitational potential energy of the fluid to increase (i.e., to flow uphill), but, because of the tilt allows the fluid to flow through the channel in a downhill direction. Flowing water is trapped at a plurality of levels which in an un-tilted apparatus are higher than the respective levels from which the fluid has flowed. A subsequent tilt of the apparatus in a sufficiently different direction, and of a sufficient magnitude and duration, causes the trapped water to flow to new, yet higher levels. Successive wave-driven tilts of the apparatus incrementally raise water to a height and / or head from which a portion of its gravitational potential energy can be released, and / or converted to electrical power, by causing the water to return to a lower level by flowing through a water turbine thereby energizing an operationally connected generator, or through some other apparatus that performs a useful function when supplied with a flow of high-pressure water.

The invention provides a continuous wave winding structure of a motor stator, a motor and a vehicle, the continuous wave winding structure of the motor stator comprises an M-phase continuous wave winding, the continuous wave winding comprises a conventional span group and a staggered span group, the conventional span group comprises conventional spans adopted when a plurality of continuous wave windings are continuously arranged, and the staggered span group comprises staggered spans adopted when the plurality of continuous wave windings are continuously arranged. The dislocation span group comprises a plurality of dislocation spans adopted during dislocation transformation of the continuous wave winding, each winding wire of the continuous wave winding is arranged by adopting one dislocation span of a plurality of conventional spans and dislocation spans in the conventional span group, and each winding wire is arranged by adopting one dislocation span only once. According to the invention, while the process difficulty is reduced, the problems of motor heating, vibration and the like caused by phase imbalance between branches of each phase winding can be effectively avoided.

This invention discloses a seismic surface wave array tomography method, storage medium, and device, relating to the field of surface wave tomography technology. The method includes: calculating the cross-correlation function between all pairs of seismic stations based on continuous waveform data recorded by seismic stations; determining the size of the subarray based on the spacing and number of seismic stations; processing all cross-correlation functions within each subarray using a linear Radon transform to obtain the dispersion curve of each subarray; moving the subarray along both the horizontal and vertical directions with a certain step size, and using a linear Radon transform to obtain the dispersion curves of subarrays at other positions; using the dispersion curves of different subarrays as input data, and constructing the phase velocity values ​​of each grid point in the study area using the seismic array tomography method. The solution of this invention can improve the imaging resolution of seismic array processing technology.

The present invention provides a heart rate estimation method based on millimeter wave radar. The method comprises the following steps: sampling a human body by using a millimeter wave radar to obtain a plurality of frequency modulated continuous wave sweep signals; forming a distance-slow time matrix and locating the distance between the human body and the radar; extracting the human body phase by using an inverse tangent function, unfolding the phase whose phase change exceeds a set threshold by using a phase unwrapping function, obtaining the phase difference of adjacent frames, and smoothing the difference exceeding the threshold by using an interpolation method; removing the noise of the smoothed phase signal by using a wavelet transform, and obtaining a reconstructed phase signal; combining an EEMD-ICA method to separate a heartbeat signal, a respiratory signal, a respiratory harmonic and noise in the reconstructed phase signal, and obtaining a heartbeat waveform; constructing a spatial spectrum function by using a multi-signal classification algorithm, and estimating the heartbeat frequency by searching the spectrum peak; the method can accurately separate the heartbeat signal and greatly improve the accuracy of the heartbeat frequency estimation.

The application discloses a kind of continuous wave windings of axial motor, it is related to motor technical field, including annular stator core, stator core is equipped with several gaps along the axial direction;Several integrally formed windings, several windings are sequentially stacked along the axial direction, S-shaped curve is equipped on winding and gap is matched, adjacent winding is misaligned at gap, and several windings form the circulation of ladder shape;Structure gasket, structure gasket is located between adjacent winding;The radial straight-through cooling flow channel of the S-shaped winding integrally pressure casting formed with the axial ladder-shaped stacking structure, the electrical performance and heat management capability of the system optimization of axial flux motor winding forming process are realized by cooperation structure gasket construction;Pressure casting molding eliminates the bending work hardening and insulation layer damage risk of traditional flat wire winding, maintains the original crystal structure and electrical conductivity of copper material, while avoiding the uneven welding point resistance, high failure rate and low production efficiency and other problems caused by multi-section welding.

This application relates to a fault diagnosis method, system, device, and medium for vehicle communication networks. It involves acquiring continuous waveform data from the physical layer of the vehicle communication network, preprocessing the waveform data to obtain at least one protocol data unit (ARD) signal block of a preset length. Each ARDR signal block includes multiple logical bits, and each logical bit corresponds to K consecutive sampling points in the continuous waveform. K is determined by the protocol rate and physical layer sampling rate of the vehicle communication network. The ARDR signal block is then input into a trained neural network model. The neural network model includes a feature extraction layer, which uses a convolution kernel of size K and stride K to perform convolution operations on the input signal block. Based on the output of the neural network model, the fault diagnosis result of the vehicle communication network physical layer is determined. This significantly improves the identification accuracy and generalization ability of various faults caused by abnormalities in different bit positions.

The utility model relates to the technical field of air purification and disinfection, and provides a high-pressure high-energy tunnel particle sterilization mechanism and a device thereof, the high-pressure high-energy tunnel particle sterilization mechanism comprises an outer tubular column, an inner conductor and a fixing frame, the outer tubular column is internally provided with a channel for the inner conductor to pass through, the inner wall of the channel is provided with threads, the outer tubular column is vertically arranged on the fixing frame, and the outer tubular column is vertically arranged on the fixing frame. The inner electric conductor is a metal electric conductor with the outer side face in a continuous corrugated shape, the height of the inner electric conductor is the same as that of the outer tubular column, the inner electric conductor is located in the middle of the outer tubular column, and the lower end of the inner electric conductor is vertically and fixedly arranged on the fixing frame. A high-pressure high-energy particle release ring is formed by the outer tubular column and the inner electric conductor, so that a high-energy particle tunnel body is formed between the outer tubular column and the inner electric conductor, particles in the tunnel body are impacted and ionized, bacteria, viruses and particles passing through the tunnel body are impacted and ionized, original structures are damaged, and the bacteria, the viruses and the particles die instantly. The disinfection and sterilization effects are achieved.

A continuous wave winding motor stator structure disclosed by the present invention comprises a stator iron core and a stator winding, the stator iron core is provided with a plurality of stator grooves arranged at intervals in the circumferential direction of the stator iron core, the stator winding is embedded in the stator grooves, and the stator winding located in the stator grooves is an in-groove winding section. The stator winding outside the stator slot is an end winding section; the in-slot winding section is coated with a first insulating layer, and the end winding section is coated with a second insulating layer; the first insulating layer is composed of two U-shaped insulating grooves, two convex ribs are arranged on the outer surface of one side wall of each U-shaped insulating groove in the length direction of the U-shaped insulating grooves, and the two convex ribs are arranged at a groove opening and the connecting position of the groove bottom and the groove side wall respectively; and the other side wall of the U-shaped insulating groove is inserted between the winding section in the groove and the side wall, provided with the convex rib, of the other U-shaped insulating groove, so that the interference fit between the first insulating layer and the stator groove is facilitated. According to the invention, the stator winding and the stator core can be effectively fixed into a whole, the operation is convenient, the energy consumption is low, and the production efficiency is high.

This invention discloses a biomimetic blade, impeller, and fan with a wave-like surface structure. The blade features a continuous wave structure along its chord length. The wave structure includes a first wave structure, a gentler wave structure, and a second wave structure arranged sequentially along the chord length. This invention targets a closed axial flow impeller, employing a wave-like biomimetic design on the blade surface. The wave pattern is primarily concentrated from 50% of the blade height to the blade tip, aiming to reduce noise from the blade tip to 50% of the blade height. During operation, the area with the highest sound pressure level is concentrated above 50% of the blade height to the blade tip, with the highest sound pressure level near the blade tip. The wave-like design at this location effectively improves the area of ​​airflow energy dissipation and accumulation, thereby reducing noise.

The present invention discloses a method for identifying repeating earthquakes based on single-station seismic observation data, belonging to the technical field of repeating earthquake identification, including: obtaining template earthquakes, stations and continuous waveform data; calculating multi-segment cross-correlation coefficients using the multi-segment cross-correlation method to screen potential repeating earthquake events; calculating the magnitude difference between the template earthquake event and the potential repeating earthquake events, and screening out the potential repeating earthquake events with a small magnitude difference from the template earthquake event; calculating the source rupture area radius of the template earthquake event and the potential repeating earthquake events using the assumed stress drop value; estimating the source distance using the PS travel-time difference of the repeating earthquake event pair to the same station, and calculating the source distance; calculating the overlap degree of the source rupture area using the source distance and screening repeating earthquakes. By adopting the above method, the present invention combines the waveform similarity judgment method and the physical judgment method at the same time under the condition that only single-station seismic observation data is available, improving the reliability and accuracy of repeating earthquake identification.