45 results about "Full wave" patented technology

The application provides an optical communication device and system, each wavelength range corresponds to a dummy light filling unit, when receiving signal light not working in full wave state (i.e. only part of the wavelength is on wave), since the input port of each dummy light filling unit only corresponds to receiving signal light of a specific wavelength range, only the dummy light filling unit of the on wave wavelength position can receive signal light, and then the remaining dummy light filling units not receiving signal light can send dummy light, thereby realizing automatic filling of dummy light. This dummy light filling method does not need to detect the on wave / off wave wavelength, and can quickly fill the energy of the wavelength position not on wave after part of the wavelength is on wave / off wave, thereby maintaining the stable operation of the wide spectrum transmission system.

In an embodiment of the invention, a full-wave rectifier circuit includes an EC resonance circuit including an inductor and a first capacitor in parallel, a first end of which is connected to a power supply voltage VDD; a first transistor and a second transistor, the drains of which are connected to a second end of the EC resonance circuit; a third transistor, the source of which is connected to a source of the first transistor and a first current source, the gate of which is connected to a gate of the second transistor and through a first resistor to a bias signal VBN and through a second capacitor to an input signal VINN, and the drain of which is connected to VDD; and a fourth transistor, the source of which is connected to a source of the second transistor and a second current source, the gate of which is connected to a gate of the first transistor and through a second resistor to the bias signal VBN and through a third capacitor to the input signal VINP, and the drain of which is connected to VDD.

The application discloses an antenna pair with high isolation and low cross polarization level, which comprises a first radiation patch and a second radiation patch arranged as two half-circle ring structures, and the first radiation patch and the second radiation patch are connected through a first branch and a second branch; the first radiation patch and the second radiation patch work in a full-wave mode; the first branch and the second branch are arranged to overlap the resonant frequencies under differential and common mode excitation of two feed ports, and good matching is ensured, so that the isolation of the first radiation patch and the second radiation patch in the band is effectively improved; through the above arrangement, the mode Q value under differential and common mode excitation is close to the same, and the first radiation patch and the second radiation patch can further have high isolation in a wider frequency range. In addition, by introducing a first short pin group and a second short pin group, the polarization current in the x-axis direction can be effectively weakened, and the cross polarization level is reduced.

The application discloses a reconfigurable metasurface-based antenna design method and device, equipment and a storage medium. The method comprises the following steps: constructing a mathematical model according to the relationship between antenna structure parameters and gain; solving the mathematical model to obtain initial antenna structure parameters when the system gain is maximum; and performing parameter scanning in the preset range of the initial antenna structure parameters through full-wave simulation to obtain optimized antenna structure parameters. According to the reconfigurable metasurface-based antenna design method provided in the application, the structure of the reconfigurable metasurface antenna can be quickly optimized, the time required for optimization is reduced, good performance is achieved, and the optimization effect is guaranteed.

This invention discloses a rapid calculation method for the broadband electromagnetic performance of microstrip lines and microstrip-like two-port structures. It relates to the fields of electromagnetic calculation and electromagnetic compatibility-aided design technology, and includes: acquiring and preprocessing the layout data of the microstrip port conductor to be tested, generating a binary layout image; inputting the binary layout image into a pre-trained convolutional neural network, outputting a real-valued encoded prediction vector of the complex mode eigenvalues ​​of the dominant mode at a preset sampling frequency; denormalizing and decoding the prediction vector to obtain complex mode eigenvalue samples; identifying the complex mode eigenvalue samples based on a second-order analytical model and analytically extending them to obtain the broadband modal impedance of the target frequency band; obtaining the port impedance matrix according to the reconstruction relationship, and converting and outputting broadband scattering parameters and electromagnetic performance results. This invention can significantly reduce the computational overhead of full-wave frequency sweep and improve the simulation efficiency of microstrip lines and the iteration speed of EMC design.

The application relates to the field of electromagnetic field transmission and waveguide technology, and discloses a rectangular waveguide based on an electromagnetic Weyl metamaterial and a design method. 2d The structure parameters of the saddle-shaped metal unit with point group symmetry are adjusted to match the Weyl point frequency with a target screening frequency, the saddle-shaped metal units are periodically arranged in a three-dimensional direction to form a rectangular waveguide nesting structure, and the self-driven frequency selection function is realized; the CST full-wave simulation software is used to model the Weyl metamaterial waveguide, a limited period is set along the transmission direction of the Weyl metamaterial waveguide, and an x-y-z full-direction open boundary condition is adopted to simulate the electromagnetic transmission characteristics of the actual waveguide, and the electromagnetic field response of the waveguide basic mode is calculated, so that the self-driven frequency selection function is verified; based on the simulation verification result, the transmission mode of the Weyl metamaterial waveguide is analyzed, it is verified that the Weyl metamaterial waveguide is bounded by the Weyl frequency, and the frequency selection characteristic that the low-frequency signal is spontaneously suppressed and the high-frequency signal is conducted.

This invention relates to a deep learning-based method for evaluating the fracturing effect of tight reservoirs, belonging to the technical field of tight reservoir fracturing effect evaluation. This deep learning-based method acquires full-wavelength data before and after fracturing using dipole acoustic logging. Preprocessing techniques such as bandpass filtering and normalization are used to "align" noise and scale differences caused by different well sections / instruments. WGAN-GP is used to generate adversarial examples for data augmentation to alleviate insufficient samples and class imbalance. Based on this, a residual network incorporating SE attention and models such as DenseNet are constructed, and mechanisms such as FocalLoss, weighted loss, regularization, and cosine annealing are employed to improve training stability and anti-overfitting ability, thereby achieving high-precision identification of fracture height and adaptation across well sections and instruments.

This invention provides a beamformer-based feed design method. By utilizing a pattern synthesis method based on Fourier transform, the excitation amplitude and phase of each array element are obtained through inverse synthesis. The obtained excitation amplitude and phase of each array element are then assigned to that element. Full-wave simulation of the array is performed in electromagnetic simulation software to obtain the array's radiation pattern, which is compared with the desired feed radiation pattern. If deviations exist, the excitation amplitude and phase can be adjusted until the overlap with the desired feed radiation pattern reaches the target. This invention achieves nearly 90% efficiency after illuminating the reflector, far exceeding the efficiency of conventional feeds illuminating reflectors. Furthermore, different excitation coefficients can be flexibly constructed for different frequencies, achieving high-precision approximation of the ideal delta function across a wide frequency range. Higher gain can be obtained with the same aperture, or the aperture size of the reflector antenna can be reduced with the same gain requirements. This significantly improves system performance and reliability.

This invention belongs to the field of electromagnetic field numerical calculation technology, specifically proposing a modular analysis method for the interfaced response of a platform antenna. By constructing a unified interface mode space, the platform's external domain response and antenna radiation behavior are mapped to finite-dimensional mode coefficients, respectively. The platform response operator can be formed with only one full-wave solution. The antenna is connected in the form of a surrogate operator, and the interaction relationship between the two is established through an interface coupling operator. This method can quickly predict the comprehensive performance after different antenna installations without repeatedly solving the platform model, and is suitable for the engineering needs of antenna loading analysis in complex equipment.

The control circuit prevents malfunctions caused by noise generated when a switch element corresponding to a predetermined phase is turned off, which is superimposed on the output voltage of the other phases input to the control circuit. [Solution] The control circuit takes the three-phase power output of a three-phase AC generator as input and controls the corresponding switch element of the three-phase full-wave rectifier circuit for each phase of the three-phase power output to charge the battery. The malfunction prevention circuit 60, after detecting the zero-crossing of the rising edge of the power output voltage of its own phase in the filter control circuit 62, disables the AND circuits 64U, 64V, and 64W for filtering its own phase and the other two phases for a predetermined time, thereby preventing the transmission of control signals to the output side. This prevents malfunctions caused by output noise generated when a switch element of one phase is switched from on to off being transmitted to the inputs of the other two phases.

This invention discloses an adaptive anti-interference demodulation circuit, receiver, and demodulation method, belonging to the field of wireless communication technology. The invention uses a full-wave rectifier module to rectify intermediate frequency or baseband signals, and then transmits the output signal via a splitter. A noise detection module extracts the noise intensity of the rectified signal and outputs a quantized signal. A linkage control module synchronously controls an adaptive DC bias module and an adaptive hysteresis comparator module based on this noise signal, dynamically lowering the decision reference voltage to offset the DC rise caused by noise rectification, while simultaneously adaptively widening the hysteresis window to suppress interference jitter. This invention achieves synchronous and adaptive adjustment of DC bias and hysteresis width without manual calibration, can be implemented entirely in hardware, and features low power consumption, high robustness, and strong environmental adaptability, making it suitable for various wireless communication receiving scenarios requiring low power consumption and anti-interference performance.

This invention discloses a method for inverting the velocity of the cemented medium behind the casing based on ultrasonic Lamb waves, relating to the field of geophysical logging. This invention utilizes a back-casing scanning imaging logging instrument to perform ultrasonic Lamb wave logging and ultrasonic pulse reflection logging at various depth points, acquiring waveform records at each depth point. The casing thickness and acoustic impedance of the cemented medium behind the casing at specified azimuths are inverted and calculated. Based on the ultrasonic Lamb wave logging waveform records, Fourier transforms are performed on the near-curved and far-curved Lamb wave full-wave waveforms at each specified azimuth of each depth point, calculating the phase difference between near and far-curved Lamb waves and performing group delay processing. Combining this with the operating frequency band of the back-casing scanning imaging logging instrument, the frequency values ​​corresponding to the minimum values ​​of the group delay at each azimuth of each depth point are obtained. After obtaining the frequency set, the wave velocity and medium type of the cemented medium behind the casing are determined based on the frequency values, the number of minimum frequencies, and the acoustic impedance values ​​at each azimuth of the frequency set.

The application provides a high-speed railway ride comfort sensitive wavelength identification method, device and equipment, comprising the following steps: a dynamic model of a train-track-bridge space coupling random vibration system is established; the dynamic response of the train-track-bridge space coupling random vibration system under random excitation of track irregularity is solved, and the vibration response power spectrum of the train body is obtained; the random track irregularity spectrum is divided into multiple wavelength components according to the upper and lower cutoff wavelengths of different wavelengths; based on the vibration response power spectrum of the train body, the comfort index corresponding to each wavelength component is calculated, and the sensitive wavelength of the full wave band is identified, so that the ride comfort and the sensitive wavelength are identified. The application effectively overcomes the defects of low calculation efficiency and insufficient identification capacity of the prior art, and provides a high-speed railway ride comfort sensitive wavelength identification solution with high efficiency, accuracy, clear mechanism and strong engineering practicability.

The present application relates to the electromagnetic protection field, and relates to a kind of human body electromagnetic protection efficiency evaluation method and system based on full-wave electromagnetic simulation.It establishes the high-precision three-dimensional human body model containing multiple internal organs of human body, gives the relevant electromagnetic parameters of human body and organ tissue, establishes the protective clothing model to be measured outside human body model and gives the electromagnetic parameters of its material, establishes the radiation source model to simulate the radiation situation received in daily life and sets the boundary condition of radiation to simulate the test situation of microwave darkroom, can obtain the electromagnetic field and specific absorption rate of human body surface and internal organ, and the size and distribution situation can be directly observed that the protection effect of electromagnetic protective clothing to human body and the shielding efficiency of protective clothing is calculated.The present application overcomes the defects of high cost, long cycle and difficult to obtain comprehensive data of traditional experimental method, realizes the rapid, accurate and intuitive quantitative evaluation and optimization design of the shielding efficiency of electromagnetic protective clothing.

The application provides a full-wave rectification powered LED lamp system, comprising an LED, an Internet of Things controller and an LED controller; a first input end of the LED controller is connected with a power supply, a second input end of the LED controller is connected with a dimming control end of the Internet of Things controller; a first output end of the LED controller is connected with the LED and the Internet of Things controller; when a voltage value of the first output end of the LED controller is less than a turn-on voltage of the LED and greater than a working voltage of the Internet of Things controller, the LED is in an extinguished state and the Internet of Things controller is in a working state; a line led out by the first output end of the LED controller simultaneously supplies power to the LED and the Internet of Things controller, and an additional power supply device is not needed to supply power to the Internet of Things controller alone; and the Internet of Things controller is kept in a continuous working state while the LED is extinguished, so that the Internet of Things controller can still continuously monitor dimming control information.

The application relates to the field of electronic circuits, and discloses a full-wave rectifier circuit which comprises a first operational amplifier, a second operational amplifier, an inductor coil, a resistor and a detection device, wherein the same polarity supply terminals of the first operational amplifier and the second operational amplifier are connected in parallel, one end of the inductor coil is connected to the output end of the first operational amplifier, the other end of the inductor coil is connected to the output end of the second operational amplifier, the power supply supplies power to the first operational amplifier and the second operational amplifier through the resistor, the detection port of the detection device is connected in parallel with the first resistor, and a full-wave rectification signal is output by the detection device. The full-wave rectifier circuit has simple circuit, does not need to use a diode for rectification, can accurately control the threshold value of the rectifier circuit, effectively detects the direct-current leakage current, effectively detects the high-frequency high-order harmonic leakage current which has potential harm, and has low cost.

The application belongs to the field of optics, and discloses a double-Gaussian double-optical-path structure, which comprises an incident light path, a transmission light path and a reflection light path, characterized in that the transmission light path comprises a first single lens, a first double-cemented lens, a second double-cemented lens and a second single lens arranged in sequence; the reflection light path comprises a mirror, a third single lens, a third double-cemented lens, a fourth double-cemented lens and a fourth single lens arranged in sequence; the root mean square point column diagram radius value of the transmission light path is less than 8 microns in the full field of view and the full wave band, and the imaging distortion is less than 2%; the root mean square point column diagram radius value of the reflection light path is less than 8 microns in the full field of view and the full wave band, and the imaging distortion is less than 2%.

The application discloses a high-speed differential cable construction method and device, computer equipment and a storage medium. The method comprises the following steps: obtaining a plurality of high-speed differential cable models with different structures; performing full-wave electromagnetic simulation on the high-speed differential cable models under the same simulation condition to obtain transmission parameters corresponding to each high-speed differential cable model; determining resonance frequency points of each high-speed differential cable model in a target frequency band based on the transmission parameters; analyzing the resonance frequency points in combination with structure parameters of the high-speed differential cable models to establish a corresponding relationship between the structure parameters and the resonance frequency; determining at least one target structure parameter according to the corresponding relationship, and constructing a target high-speed differential cable model based on the at least one target structure parameter. The design efficiency, resonance avoidance capability and signal transmission reliability of the high-speed differential cable can be significantly improved.

This invention discloses a rapid beamforming method for large antenna arrays based on partitioned calibration and proximity coupling, belonging to the field of antenna design and electromagnetic simulation technology. It aims to obtain the actual realized gain pattern of large mutually coupled arrays at low cost and high speed. This invention models the array in differentiated regions: precise simulation of local coupling is performed on edge elements, while data reuse is achieved for central region elements using a pre-calibrated equivalent model. After acquiring the electric field data of each element, a global optimization algorithm based on the mutually coupled environment is used to directly solve for the element excitation distribution that optimizes beam pointing performance, and the actual realized gain pattern conforming to the actual port matching state is quickly synthesized. Simulation results show that, while maintaining accuracy similar to full-wave simulation, this invention only requires simulating a small number of key elements to efficiently synthesize the radiation pattern of a large-scale array, significantly improving design efficiency.

The application provides a cement sheath quality evaluation method and device, and relates to the technical field of oil and gas field exploration and development. The method comprises the following steps: obtaining a full-wave waveform set corresponding to different shear coupling stiffnesses of a first sliding interface according to a previously established casing well sliding interface borehole sound field theoretical calculation model; measuring the first sliding interface to obtain a target full-wave waveform, and performing waveform matching on the target full-wave waveform in the full-wave waveform set to obtain a target shear coupling stiffness corresponding to the target full-wave waveform; and determining a cement sheath quality evaluation result corresponding to the target shear coupling stiffness according to a preset corresponding relationship. The device executes the above method. The cement sheath quality evaluation method and device provided in the application can objectively and accurately evaluate the cement sheath quality.

This application provides a frequency domain quality control method and apparatus for arrayed acoustic full-wavelength signals, relating to the field of geophysical logging technology. The method includes: performing time-frequency conversion on received acoustic full-wavelength data to obtain the frequency domain signal of the acoustic full-wavelength data; performing a preset function fitting operation on the frequency domain signal of the acoustic full-wavelength data to determine the target peak position, and determining the effective bandwidth and peak frequency of the frequency domain signal of the acoustic full-wavelength data; determining the low-frequency and high-frequency signals of the frequency domain signal of the acoustic full-wavelength data based on the effective bandwidth and peak frequency, determining the low-frequency energy of the low-frequency signal and the high-frequency energy of the high-frequency signal, and identifying anomalous signals in the low-frequency and high-frequency signals; and generating a data quality assessment result for the current depth segment based on the number of all anomalous signals in the current depth segment. This application has the advantages of high processing accuracy and convenient implementation, and can provide a more reliable technical guarantee for the accuracy of subsequent logging data processing and interpretation.

This utility model discloses a transformer structure and its water-cooled rectifier power supply, including a transformer assembly. A synchronous rectifier module is disposed on the left or right side of the transformer assembly, and the transformer assembly has at least two secondary sides. The synchronous rectifier module is electrically connected to the two secondary sides of the transformer assembly, respectively. Several absorption modules are stacked on the synchronous rectifier module via copper pillars, and the absorption modules are electrically connected to the synchronous rectifier module. A drive module is also disposed on the synchronous rectifier module, and the drive module is electrically connected to the synchronous rectifier module. This utility model optimizes the structure of the synchronous rectifier module, achieving full-wave rectification function with a single novel synchronous rectifier module, saving production costs and improving material utilization. Simultaneously, the installation position of the synchronous rectifier module has been changed; by placing the synchronous rectifier module on the left or right arm of the magnetic core, the influence of eddy currents is avoided.

The application discloses a PIN diode modeling and simulation method based on LP-CDI-FDTD, belongs to the field of computational electromagnetics, microwave technology and circuit simulation, and comprises the following steps: firstly, an equivalent lumped parameter model of a semiconductor device is established, and a voltage-current relationship thereof is obtained; then, the relationship is converted into an equivalent current density, and is embedded into a Maxwell curl equation according to the relationship between an electric field and a voltage, so as to construct an electromagnetic-circuit coupling equation set; further, a leapfrog compliant divergence unconditional stable time domain finite difference method is adopted to discretize the coupling equation set, and a discrete updating equation is obtained; finally, iterative calculation is carried out according to the equation, and electromagnetic fields and device states are synchronously updated. The method realizes the inherent strong coupling between full-wave electromagnetic fields and semiconductor physical processes, and breaks through the time step restriction caused by a CFL condition in traditional methods by using the unconditional stability of the algorithm, so that the calculation efficiency can be significantly improved when simulating a device containing a fine structure.

The application relates to the technical field of measuring electric variables, and provides a digital phase-sensitive rectification method, a system and a computing device.The system comprises: an analog-to-digital conversion module which converts an alternating current signal into a discrete signal; a plurality of phase rectification modules which respectively perform full-wave rectification on the discrete signal for one period with different reference phases as starting points and obtain rectification values through accumulation of rectified waveform data; an amplitude analysis module which obtains an amplitude linear representation value based on the rectification values of a response signal; a phase offset analysis module which obtains a phase offset based on the rectification values with one reference phase as a basic phase; and a measured signal analysis module which obtains a measured linear representation value of a measured signal based on the amplitude linear representation value and the phase offset.The application can filter out correlation interference.

The application discloses a kind of based on micro-step dielectric constant gradually changes plane fresnel lens and its design method, belong to millimeter wave antenna and additive manufacturing technical field.The method is based on phase correction theory and the nonlinear coupling mechanism of height-filling rate, by strategically reducing the height of traditional multi-medium plane fresnel lens outer edge ring band, so as to significantly improve the medium filling rate of this area;The method maintains its original excellent electromagnetic performance, and converts the low filling rate ring band originally mechanically weak into a high filling rate stable ring band, significantly improving the overall mechanical reliability of the lens.The application solves the problem of mechanical structure weakness caused by low filling rate of outer edge ring band in the same full-wave region during the design process of traditional multi-medium plane fresnel lens.

The application relates to the technical field of vehicle-mounted power distribution, in particular to an integrated hybrid power supply system and a vehicle, wherein the method comprises the following steps: a first power supply and a second power supply, the voltage ranges of the first power supply and the second power supply are different; a first voltage conversion circuit, a second voltage conversion circuit and a rectifier circuit, the first voltage conversion circuit is connected with the first power supply, the second voltage conversion circuit and the rectifier circuit respectively, the second voltage conversion circuit is connected with the second power supply; if the voltage range of the first power supply is greater than that of the second power supply, the rectifier circuit is at least one of a half-bridge rectifier circuit and a full-bridge rectifier circuit, and the voltage conversion circuit is a step-down circuit; if the voltage range of the first power supply is smaller than that of the second power supply, the rectifier circuit is a full-wave rectifier circuit, and the voltage conversion circuit is a step-up circuit. Therefore, the problems of incompatibility of chassis system and power supply demand of other controllers, large system modification amount and high cost in the related art are solved.

The application discloses a kind of ocean sound field parallel simulation methods based on DR-SETD, belong to the technical field of simulation calculation.This application includes: three-dimensional fluid-structure interaction model is simplified to axisymmetric model to reduce the scale of calculation;Adopt high-order spectral element method based on orthogonal polynomial to carry out spatial dispersion, and numerical singularity is handled for axisymmetric property;The weak form of time-domain wave equation of fluid domain and solid domain is respectively constructed, and is solved by interface coupling condition;Efficient parallelization of solving process is realized using explicit time integration format and shared memory parallel computing architecture.This application realizes the high-precision, high-efficiency full-wave simulation of fluid-structure interaction sound field containing complex terrain.

The application discloses a design method of a polarization maintaining abnormal transmission element and the polarization maintaining abnormal transmission element. The application directly obtains a transmission light field component, transmittance and phase information by performing single full-wave electromagnetic simulation on an element to be optimized under a preset polarization condition; further, a transmission matrix is constructed based on the transmission light field component, and a deviation degree is calculated from the transmission matrix, a target diffraction order efficiency is calculated from the transmittance, a fitness function of an optimization process is constructed in combination of the deviation degree, the target diffraction order efficiency and the phase information; further, the structure parameters of the element to be optimized are described by vectorization, and a particle swarm optimization algorithm is introduced to cooperatively optimize the parameter vector to be optimized, so that a global optimal or approximate global optimal structure solution can be efficiently searched in a larger parameter space, and the complexity of manual parameter adjustment and repeated simulation is reduced; finally, the polarization maintaining abnormal transmission element is constructed by using the optimal structure parameters, and the polarization maintaining performance and transmission efficiency of the optical element are considered.

The present application relates to a kind of underground fracture identification method, device, electronic equipment and computer storage medium, belong to acoustic wave detection technical field, wherein, the underground fracture identification method includes: extracting three borehole mode waves in full wave train waveform in acoustic logging, and the time difference and energy amplitude of each borehole mode wave are calculated;Determine the time difference envelope area of each borehole mode wave at time difference mutation place based on the time difference of each borehole mode wave, calculate the average energy amplitude and cooperative attenuation index of the borehole mode wave based on the energy amplitude of the borehole mode wave;Based on the time difference envelope area, average energy amplitude and cooperative attenuation index of each borehole mode wave, the three-dimensional parameter atlas of underground fracture to be identified is constructed, the three-dimensional parameter atlas is analyzed, and the comprehensive indication curve of underground fracture to be identified is determined.The present application can accurately identify underground fracture.

The application provides a gain compensation method, device, optical amplifier and storage medium, and belongs to the technical field of optical communication. The method is applied to an optical amplifier. In the method, after the power of input signal light changes, the power of pump light of the optical amplifier is adjusted based on power change information of the input signal light, the input signal light is amplified by using the pump light with the adjusted power, and the input signal light is gain compensated. In this way, the input signal light can be gain compensated only by detecting the power change information of the input signal light, the optical amplifier does not need to be in a full wave state for a long time, and therefore, the failure rate of the optical amplifier can be reduced.