40 results about "Constant waveform" patented technology

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.

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.

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 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.

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.

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.

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.

A system includes a controller configured to reconstruct a continuous waveform into a discrete analog version. The system includes a numerical optimizer configured to determine the frequency of a pulse sequence. The numerical optimizer uses radial motion mode frequencies and desired gate times. The numerical optimizer generates the pulse sequence by disabling phase space trajectories, unwrapping spins and motion, and limiting the Rabi frequencies of motion sideband transitions. The system also includes a display configured to illustrate the discrete-frequency modulated pulse sequence based on the determined frequencies.

The utility model provides a front and back universal leveling machine. The utility model discloses a front and back universal leveling machine which comprises a rack, a lower roller assembly, an upper roller assembly, a feeding assembly and an adjusting assembly. Wherein the rack is fixedly arranged on the horizontal ground; the lower roller assembly is arranged at the bottom of the rack and is connected with driving equipment; the upper roller assembly is slidably arranged on the rack in the vertical direction and located above the lower roller assembly, and a continuous wavy roller gap with the variable width is formed by the upper roller assembly and the lower roller assembly. The feeding assembly is arranged on the rack in a sliding mode in the vertical direction and can be connected with the lower roller assembly. The adjusting assembly is arranged on the machine frame in a sliding mode in the vertical direction and can be adjusted to the position with the height equal to that of the upper roller assembly. The front and back universal leveling machine can adapt to plates in different uncoiling modes, and has the advantages of being thorough in stress eliminating effect and good in leveling effect.

The invention relates to a stator winding preparation method, a stator winding, a stator assembly and a permanent magnet motor. The stator winding preparation method comprises the steps that 18 conductors used for winding 9 winding branches of three phases are sequentially laid and wound in a wave winding mode; during tiled winding, the two effective parts of the wave winding pattern of the same-layer overline formed by wave winding of any conductor are arranged on the same layer, and the two effective parts of the wave winding pattern of the two adjacent groove layers are arranged in an up-and-down staggered layer manner; the 18 conductors which are laid and wound are coiled from one ends of the conductors to the other ends of the conductors; during coiling, the coiling direction of the 18 conductors is the direction in which the serial number of the conductor grooves is reduced, and the radial outer sides of the 18 conductors are the sides where the groove layers with the serial number of 1 of the conductor grooves are located. Through the specified coiling process, the problem that the NVH performance of the odd-number-layer stator winding of the continuous wave winding of the permanent magnet motor is poor due to the improper preparation method can be solved.

The invention relates to the field of petroleum drilling equipment, in particular to a high-speed continuous wave pulser for petroleum drilling, which comprises a pulse generating device shell sleeve, a transmission shaft, a rotor valve plate and a stator valve plate, the transmission shaft, the rotor valve plate and the stator valve plate are mounted on the inner side of the pulse generating device shell sleeve, and a first slurry passing hole and a second slurry passing hole are correspondingly formed in the rotor valve plate and the stator valve plate respectively. The rotor valve plate and the transmission shaft are coaxially fixed, the stator valve plate is fixed to the inner wall of the pulse generating device shell sleeve, and the stator valve plate is located on the side, away from the slurry output direction, of the rotor valve plate and is in sliding fit with the rotor valve plate; a valve type filtering structure used for filtering sand particles is arranged on the side, away from the rotor valve plate, of the stator valve plate. Compared with an existing high-speed continuous wave pulser for petroleum drilling, the high-speed continuous wave pulser has the advantages of being capable of preventing gravel particles with large particle sizes in slurry from abrading the edge of a valve hole of a rotary valve, and therefore the service life of the rotary valve is prolonged.

The invention relates to a preparation method of a stator winding, the stator winding, a stator assembly and an induction motor. The method comprises the following steps of: flatly winding conductors for winding 6m branch units of three phases in sequence in a wave winding manner; during tiled winding, two effective parts of any wave winding pattern formed by wave winding of any conductor are arranged in an up-and-down staggered layer manner, and the effective parts of the wave winding patterns in different cross-layer manners are arranged in a staggered layer manner; the 6m conductors which are laid and wound are coiled from one ends of the conductors in a circular ring shape, and the 6m conductors are coiled for n / 2 circles to the other ends of the conductors; during coiling, the coiling direction of the 6m conductors is the direction in which the serial number of the conductor slots is increased, and the radial outer side of the 6m conductors is the side where the slot layer with the serial number of 1 of the conductor slots is located. According to the invention, through the specified coiling process, the problem that the inductance unbalance amount of the continuous wave winding stator winding of the induction motor is relatively large due to an improper preparation method can be improved.

The invention discloses an unsupervised deep neural network construction method based on integrated learning, and particularly relates to the technical field of neural networks, and the method comprises the steps: obtaining a continuous waveform record of an underground detector, obtaining a discrete waveform sample through preprocessing, distributing an index, constructing a pseudo-label pool, and initializing a parallel neural network; executing forward correction training based on hidden state consistency, dynamically correcting a pseudo tag and updating a network weight; sending a new round of samples into the updated network, integrating decision results and positioning an uncertain source network; a diagnostic feedback packet is generated based on the source network, and pseudo-tag pool parameters are adjusted to optimize subsequent training. According to the method, a parallel neural network architecture fusing residual connection, U-shaped coding and decoding and an attention mechanism is constructed, and a forward correction training and dynamic pseudo-label optimization strategy based on hidden state consistency is combined, so that the core technical problems of many interference signals and weak effective micro-seismic signals in the underground monitoring environment of the fractured well are effectively solved.

The invention discloses a compensation type connector for a mud continuous wave pulse generator, and belongs to the technical field of oil drilling equipment, in the installation process, a coaxial connector is jacked into a connector seat through an opening in the lower end of the connector seat, the coaxial connector enters a bayonet of a sliding rod, and at the moment, the coaxial connector is pushed into the connector seat through the opening in the lower end of the connector seat; the radial compensation cylinder is passively arranged outside the coaxial connector in a sleeving mode and gradually moves upwards into the clamping opening along with deepening of the coaxial connector, finally, the radial compensation cylinder is completely and tightly arranged on the peripheral side of the coaxial connector in a sleeving mode after being extruded and deformed by the clamping opening, and comprehensive radial compensation can be provided for the coaxial connector; therefore, the coaxial connector is not easy to form a gap or deviate with the connector seat and the sliding rod in the installation and use processes, and the stability and reliability of the mud continuous wave pulse generator during and after installation are ensured.

The utility model discloses a rotary valve flow self-control type continuous wave mud pulse generator which comprises a pulser pup joint, a turbine generator, a driving pup joint and an exploring tube pup joint. The pulser short section comprises an outer pipe shell, a motor shell, a motor, a motor speed reducer, a ball screw, a rotary encoder, a torque sensor and a rotary valve assembly composed of a stator and a rotor. The driving short-circuit energy-saving device realizes the adjustment of a gap of the rotary valve assembly and the generation of a pulse signal through the operation control of a motor; the exploring tube short section is used for measuring well drilling track parameters in an energy-saving manner and storing data, and sending an operation instruction to the driving short section according to a set program; the turbine generator provides a direct-current power supply for the system. The distance between the rotor and the stator of the rotary valve can be automatically adjusted according to time-varying factors such as pumping pressure, hole depth and flushing fluid density, so that the problem of pulse output waveform distortion caused by complex working conditions under long-time working is reduced, and the identifiability and demodulation performance of waveforms are improved.

The application discloses a kind of based on collaborative index optimization's general sense fusion mixed waveform design method, establishes MIMO-ISAC base station equipped with N t Transmitting antenna and N r Receiving antenna, construct shared signal and performance index model, realize the target while base station serves multiple communication users is perceived;Under the condition of satisfying transmitting power level maximum constraint and waveform constant modulus constraint, the problem model of collaborative optimization parameter estimation performance and communication service quality is established;For the nonlinear characteristics of problem model, the geometric characteristics of non-convex constraint are excavated, the constant modulus constraint is associated with Riemann manifold in nature, so that the constrained non-convex optimization problem is converted into an unconstrained convex optimization problem on manifold;SM-RMTR optimization algorithm is proposed to solve, and the integrated sensing and communication system target parameter estimation performance optimization waveform is obtained based on the solving result.In the case of constant waveform modulus, the application can realize more efficient and more accurate target detection and parameter estimation.

The invention relates to a hollow conductor (200) forming a continuous wave winding (210) of a stator (120). The stator (120) and a rotor (110) form an electric machine (100). The wave winding (210) is formed by distributing the conductor (200) between axial ends (301, 302) of the winding (210) by winding around the stator periphery with a certain winding pattern. A first axial end (301) is flooded with a cooling fluid in a first cooling cavity (510) and a second axial end (302) is flooded with a cooling fluid in a second cooling cavity (520). The first axial end (301) comprises a first set of holes (310) and the second axial end (302) comprises a second set of holes (320), thereby allowing the cooling fluid to flow from the first cooling cavity (510) via the first set of holes (310) through respective sections of the hollow conductor (210) to the second cooling cavity (520).

The invention discloses a continuous wave winding stator flat cable slot-entering auxiliary device and a flat cable slot-entering method, the auxiliary device comprises a base and a flat cable cylinder, the lower end of the flat cable cylinder sleeves the base, and the upper end of the base is provided with an annular tongue-and-groove for assembling a stator core; a plurality of winding assembly through holes are uniformly formed in the middle of the winding displacement cylinder in the circumferential direction, the winding assembly through holes are in one-to-one correspondence with stator grooves of the stator core, and the outer diameter of the winding displacement cylinder is equal to the inner diameter of a hollow part of the stator core to be wound; a plurality of top plates corresponding to the winding assembly through holes are arranged in the winding displacement cylinder, the side end of each top plate is clamped in the corresponding winding assembly through hole, and each top plate can be driven by a pushing mechanism to synchronously and horizontally move outwards, so that each stator winding clamped in the corresponding winding assembly through hole is pushed out of the corresponding winding assembly through hole, and then the corresponding winding assembly through hole is formed in the winding displacement cylinder. And clamping into each stator slot of the stator iron core. When in use, the flat cable is assembled on the flat cable cylinder, then the stator core is assembled on the base, and the flat cable is pushed into the core groove through the top plate.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a first network entity may encode first information using keying modulation. The first network entity may encode the second information using frequency modulated continuous waveform (FMCW) modulation. A first network entity may transmit a communication including a first layer indicating first information and a second layer indicating second information. Numerous other aspects are described.

To provide continuous waveform driving in multi-color electrophoretic displays.SOLUTION: The invention provides continuous waveforms for driving a four-particle electrophoretic medium including four different types of particles, such as a set of scattering particles and three sets of particles of subtractive color mixing. 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. In one embodiment, the waveform includes at least 32 unique voltage levels during 500 ms. In one embodiment, the at least four types of particles include two particles of a first polarity and two particles of a second polarity.SELECTED DRAWING: Figure 1A

Provided is a high-voltage power supply (100) wherein: a double-wave rectification circuit unit (3) includes a capacitor (36) that is connected to one end of a first series circuit unit (4), and a charging circuit (37) that charges the capacitor (36) with an electric charge; a first half-wave rectification CW circuit unit (10) rectifies and boosts an AC voltage that is generated in a secondary winding (21b); a second half-wave rectification CW circuit unit (20) rectifies and boosts the AC voltage that is generated in the secondary winding (21b) in the opposite phase from that of the first half-wave rectification CW circuit unit (10); an output voltage from the first half-wave rectification CW circuit unit (10) and an output voltage from the second half-wave rectification CW circuit unit (20) are added to a first DC voltage VDC1 in the first series circuit unit (4) to generate a second DC voltage VDC2; and a control unit (8) instructs a timing at which the charging circuit (37) charges the capacitor (36) with the electric charge.

An electronic treatment device (200) includes a plurality of electrodes that contact a part of a user's body, and a control device (205) that performs treatment of the part by applying a pulse train wave composed of a plurality of continuous waves of pulses to the plurality of electrodes. The control device (205) outputs a first pulse train wave including a plurality of pulses having a first amplitude, and after outputting the first pulse train wave, repeatedly outputs a second pulse train wave including a plurality of positive pulses having a second amplitude and a third pulse train wave including a plurality of negative pulses having a third amplitude. The first amplitude is greater than the second amplitude and the third amplitude.

The application discloses a kind of distributed motor waveform winding winding methods, comprising the following steps: configuration winding machine: winding machine includes turntable, positioning disc, three winding columns, three line pressing mechanisms and rotary drive unit;Enameled wire pre-fixing: the starting end of enameled wire is fixed on one of winding column, and enameled wire is wound in clockwise direction or counterclockwise direction on three winding columns a circle, and the pre-fixing of enameled wire is completed;Pre-winding forming: start rotary drive unit, drive turntable to rotate along the horizontal center of circle at constant speed in clockwise direction or counterclockwise direction, so that enameled wire is wound in equilateral triangle trajectory and along up-down direction on three winding columns, when winding to preset number of turns, pre-winding forming is completed;Wave forming: after pre-winding, form regular continuous wave shape;Wire forming: another wire taking cup is provided, the starting end of enameled wire is loosened from winding column, and the formed distributed motor waveform winding can be taken out from three winding columns.

The invention discloses a high-voltage and high-power ultrasonic driving chip, which relates to the technical field of integrated circuits and comprises a high-voltage and high-power ultrasonic driving circuit consisting of a logic input circuit, a low-voltage side level conversion circuit, a high-voltage side level conversion circuit, a high-voltage side level conversion circuit and a high-voltage side level conversion circuit. And a multi-stage high-voltage output stage and a continuous wave output stage. According to the high-voltage high-power ultrasonic driving chip, a single chip is adopted to integrate multi-level output, CW output and a driving stage, peripheral circuits are reduced, high integration is achieved, and single-channel five-stage output and dual-channel 17-stage differential output are supported; the system supports the highest 100MSPS update rate, adapts to high-speed ultrasonic imaging, realizes high-speed response, is internally provided with a configurable latch / straight-through mode, supports external clock synchronization and can be flexibly controlled, and power consumption optimization is realized by internally arranging level conversion and power consumption management, supporting a standby mode and reducing static power consumption.

This utility model discloses a wave-shaped drill bit, including a shank and a drill bit insert mounted on the shank. The drill bit insert includes two cutting edges and two chip grooves. The cutting edges and chip grooves are symmetrical about the rotation axis of the shank. The cutting edges have a continuous wave pattern, and the chip grooves have a wave pattern along the radial section of the tool. The end of the chip grooves is connected to the cutting edges. The wave-shaped chip grooves of this utility model significantly reduce the actual contact area between the chips and the tool, thereby reducing friction and improving the chip removal capacity of the drill bit. At the same time, the cutting edge of this utility model is longer than that of conventional drill bit cutting edges. The amount of material removed in the same volume is distributed over a longer edge length, which reduces the cutting load per unit edge length and avoids local overheating or stress concentration, which could lead to edge chipping or rapid wear.

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 relates to a seismic sound signal front-end detection method based on an FPGA (Field Programmable Gate Array). The method comprises the following steps: receiving parameter configuration of an upper computer through a serial peripheral interface; obtaining seismic sound continuous waveform data collected by a sensor in real time; effective seismic sound signal data are screened and intercepted through a signal detection method of a short-time window average energy ratio to a long-time window average energy ratio; performing pre-enhancement, framing windowing, Fourier transform and Mel filter bank conversion processing on the seismic sound signal data to obtain Mel filter bank characteristics of the seismic sound signal; inputting the Fbank feature sequence into a convolutional neural network model composed of four one-dimensional convolutional layers for seismic sound signal identification and classification; and returning a signal category prediction result through the SPI interface. According to the method, FPGA hardware acceleration and algorithm design optimization are matched, low-delay and high-robustness seismic sound signal front-end detection processing is achieved, and a better solution is provided for related application scenes.