17 results about "Mode matching" patented technology

This application relates to the field of charging pile testing, and in particular to a method and system for detecting abnormal states of charging piles based on harmonic fingerprints. The method includes: acquiring a broadband harmonic raw dataset from the output end of the charging pile during charging; based on the broadband harmonic raw dataset, extracting and structurally encapsulating full-band harmonic components categorized into three major component types within the charging pile to generate a component-level harmonic feature fingerprint set; based on the component-level harmonic feature fingerprint set, performing fault harmonic mode matching and component category determination for the current abnormal charging pile to generate a fault component category information set; based on the fault component category information set, constructing fault component location confirmation and production responsibility traceability logic, generating and outputting a fault diagnosis and traceability report set. This application, in the process of detecting abnormal states in charging piles, can locate the root cause of the fault, guide efficient maintenance, and drive the optimization of component design and procurement quality.

A wireless communication method includes: transmitting, by a first device, first information to a second device. The first information is used for determining a first reception mode matching a first transmission mode; and the first transmission mode is used for non-orthogonal transmission of a first signal on a target transmission resource, and the first reception mode is used for receiving the first signal on the target transmission resource.

The present application relates to the technical field of power communication monitoring, in particular to a kind of electric power cable monitoring device and monitoring method, comprising: collecting original optical signal containing external disturbance characteristic change in multiple predetermined positions of electric power cable, signal is demodulated and separated, obtain two kinds of characteristic vectors reflecting vibration mode and temperature change. After the alignment of the two types of vectors is associated in space-time, a multidimensional monitoring tensor is generated, a hidden Markov model describing the evolution of the physical state of the cable is constructed, the state transition probability is calculated through the model, and the abnormal state sequence matching the preset fault mode is identified. According to the abnormal sequence, the time axis evolution process of the monitoring tensor is traced back. The present application can effectively separate the vibration and temperature disturbance characteristics, avoid the mutual interference of different disturbance signals, make the abnormal state identification more consistent with the actual operation law of the cable, accurately determine the occurrence position and type of the initial disturbance, and improve the reliability and positioning accuracy of the cable abnormal monitoring.

The utility model belongs to the microwave device technical field discloses a kind of microwave multilayer board intervertical interconnection circuit structure, including cavity, microwave multilayer board and radio frequency glass insulator;Microwave multilayer board is fixed in the two sides of cavity, glass insulator is set on the extension structure parallel to microwave multilayer board in cavity geometric center, and microwave multilayer board forms air coaxial structure, for being connected with microstrip circuit by bonding mode and realizing the matching transmission of microwave signal, the vertical interconnection of microwave multilayer board radio frequency circuit is completed.The utility model forms air coaxial structure between radio frequency glass insulator and microwave multilayer board to realize circuit matching, more simple than prior art using circuit mode matching.And gold wire bonding mode can realize automation assembly and improve assembly efficiency.

This invention discloses a method for optical interconnection of silicon photonic chips based on meniscus-guided additive manufacturing, belonging to the field of silicon photonic chips. The method includes: in a controlled gas environment, using a printing material system containing polymers and organic solvents, stretching a liquid bridge between the optical interfaces of two silicon photonic chips using microneedles, and guiding the movement of the meniscus to form a polymer filament connecting the two ends. Subsequently, the solvent evaporates and solidifies, ultimately forming a free-space polymer optical waveguide spanning the chips. This method does not rely on high-energy lasers or adhesive application and washing processes, and is simple, low-cost, and highly efficient. The fabricated waveguides can achieve controllable spans from hundreds of nanometers to hundreds of micrometers in diameter and tens of micrometers to millimeters in length. The end faces can be optimized into controllable transition structures, effectively improving mode matching and coupling efficiency. It features low insertion loss, high alignment tolerance, and good mechanical stability, making it suitable for high-density silicon photonic packaging and heterogeneous integration.

The application discloses a four-port vertical grating coupler based on aperiodic structure, which comprises, from bottom to top, a silicon substrate, 5 pairs of silicon / silicon dioxide alternating Bragg mirror layers, a silicon dioxide lower cladding layer, a silicon flat plate layer and a single-layer grating layer. The single-layer grating layer has a four-axis symmetric two-dimensional geometric pattern, which is composed of discrete silicon dielectric blocks and filling holes arranged alternately. The duty cycle difference of the central region of the single-layer grating layer presents a specific cross distribution, and the duty cycle difference of the main axis and the diagonal direction of the peripheral region presents a specific positive-negative alternating aperiodic oscillation in the radial direction. The device prevents light leakage through the bottom Bragg mirror, realizes mode matching with a vertical Gaussian light beam in combination with the top aperiodic grating structure, and significantly improves the coupling efficiency of four-port orthogonal routing and reduces the reflectivity.

The application provides a signal quality enhancement processing method and system based on adaptive modulation identification, receives a wireless communication signal, collects multi-dimensional signal characteristics of the wireless communication signal, calls an adaptive modulation identification model to analyze and generate a modulation mode set. A signal quality enhancement strategy library is constructed based on the modulation mode set, and each strategy corresponds to a specific modulation mode. A strategy matching the current modulation mode is selected from the strategy library to enhance the signal, and an enhanced signal is obtained. The enhanced signal is subjected to modulation mode identification again, the identification result is compared with the initial set, and the strategy parameters in the strategy library are adjusted according to the comparison result, so that the dynamic optimization of the enhancement strategy is realized. The application can adaptively enhance the signal quality according to the signal modulation mode, effectively reduce the communication error rate, and improve the performance of the wireless communication system.

Aspects of the present disclosure relate to a quantum information processing (QIP) system that includes an ion trap inside a vacuum enclosure with a vacuum window. The QIP system includes an imaging objective, located at a first position, configured to focus light emitted through the vacuum window from a trapped ion into a single mode (SM) fiber at a second position. The QIP system includes a first camera, a second camera, a pick-off mirror, and an imaging lens, used in combination to align the imaging objective and the SM fiber in order to minimize (1) an objective tilt angle between an optical axis of the imaging objective and a normal axis to the vacuum window and (2) a fiber tilt angle between an axis of the SM fiber and the optical axis of the imaging objective.

This invention discloses a laser-induced acoustic underwater communication method and apparatus based on discrete linear frequency modulated pulse intervals, belonging to the field of cross-medium communication technology. The invention first maps the binary data to be transmitted into a pulse time interval pattern, where logic "0" and "1" correspond to pulse sequences with pulse intervals that decrease or increase linearly with time, respectively, and inserts a silence protection interval. A laser is controlled to emit pulses towards the water surface at non-uniform intervals, utilizing the photoacoustic effect to excite a train of acoustic pulses with discrete linear frequency modulated characteristics in the water. After acquiring the acoustic signal, the receiving end uses a local reference signal matching the transmitting end's pattern to perform dual-channel cross-correlation demodulation, achieving data decision-making and self-synchronization based on the amplitude and position of the correlation peaks. This invention combines the cross-medium advantages of laser-induced acoustics with the high processing gain characteristics of linear frequency modulated signals, solving the problem of poor multipath resistance in traditional pulse position modulation and significantly improving communication reliability in complex underwater acoustic channels.

A kind of multipass cell-based laser pulse post-compression device, it is constituted in the direction of laser pulse advance in turn, mode matching module, nonlinear spectral broadening module, dispersion compensation module.This application can multiply compress the pulse width of high-power, high-energy, high-repetition industrial pulse laser, and the designed multipass cell oscillation mode will significantly improve the heat dissipation of mirror surface, expand the average power range of pulse laser that the device can adapt, and then multiply improve its peak power.

The application discloses a kind of based on ambient air's multi-cavity nonlinear laser compression system and its debugging method, with solid as nonlinear medium, the technical problems of MPC high peak incident power limit and the overall equipment structure complexity of MPC inert gas as nonlinear medium are solved, wherein based on ambient air's multi-cavity nonlinear laser compression system includes front end seed source, half-wave plate, polarizing beam splitter, mode matching lens group, multi-cavity, collimating lens group and GTI mirror group;Mode matching lens group is Galileo telescope system, so that the laser spot size imported into multi-cavity is adapted with the spot size corresponding to the intrinsic mode of multi-cavity;Multi-cavity is based on ambient air as nonlinear medium, it includes first concave mirror, second concave mirror, first mirror and second mirror;Collimating lens group includes second convex lens and third convex lens, and the laser emitted by third convex lens enters GTI mirror group for dispersion compensation to the laser emitted by collimating lens group.

This invention discloses a multimodal adaptive fitting method and apparatus for Rayleigh surface wave dispersion curves, relating to the field of surface wave exploration technology. The invention first performs multimodal dispersion forward modeling based on subsurface medium model parameters to obtain theoretical velocity values ​​for multiple candidate modes corresponding to each frequency point. Based on the difference between observed and theoretical velocity values, a frequency-mode residual cost matrix is ​​constructed. Simultaneously, a global mode sequence is formed by the selected candidate mode numbers at each frequency point. A total cost function is constructed based on the residual cost matrix and a continuity penalty coefficient. A dynamic programming algorithm is used to globally optimize and solve the total cost function, obtaining the optimal mode sequence across the entire frequency band and determining the target theoretical mode branch corresponding to each frequency point. The optimal residual is then extracted to construct the fitness value. The entire process effectively suppresses unreasonable mode jumps and improves the continuity and stability of dispersion curve fitting. It is applicable to mode matching and fitness calculation in Rayleigh surface wave dispersion curve inversion.

This invention relates to the field of audio system power management and interface management technology, and particularly to a power and interface management method for a multifunctional audio system. The method includes: acquiring operating status control information; performing interface connection status detection, operating parameter acquisition, and operating status information generation to obtain first operating status information; comparing the power input interface and the built-in battery interface, and combining main link activation status processing and module hierarchical enabling processing to generate main power supply path information and first interface mode information; performing continuous monitoring, mode matching, and mode switching to generate second operating status information; and performing anomaly detection, anomaly handling, and operating status write-back to generate third operating status information. This invention maintains a continuous association between main power supply path information and interface mode information, ensures seamless connection between continuous monitoring, mode switching, and anomaly handling, and improves the consistency of state management and the stability of interface management during the operation of a multifunctional audio system.

A picosecond pulse nonlinear compression device based on a multi-pass cell achieves the advantages of high energy, compactness, and low cost, realizing femtosecond-level pulsed lasers at kilohertz repetition rates. A picosecond pulsed fiber laser generates stable mode-locked picosecond pulses with repetition rates of tens of megahertz. These pulses are injected into a solid-state regenerative amplifier via a fiber coupler, selectively amplifying the output signal to generate millijoule-level picosecond pulses with kilohertz repetition rates. The pulses then enter a mode matching module, which matches the mode of the incident laser with the eigenmode of the MPC cavity. Afterward, the pulses are injected into a spectral broadening module, which is filled with a nonlinear medium liquid to broaden the incident laser spectrum. Finally, the pulses are injected through convex mirrors into a chirp compensation module, which includes multiple pairs of parallel chirped mirrors to compensate for dispersion in the broadened pulsed laser spectrum.

This invention discloses an integrated sensing method and apparatus based on OAM mode-driven sensing, comprising: generating an OFDM communication signal conforming to communication standards without customized sensing adjustments; determining the OAM mode topology charge number according to detection requirements; feeding the OFDM signal into a uniform circular array, and applying a calculated array element feed phase offset to make the radiated signal carry a specific OAM spiral phase wavefront; receiving the echo signal and retaining the phase characteristics; calculating the target azimuth angle using OAM mode matching or spectral analysis techniques and extracting subcarrier phase change data; and combining the above information to calculate the target radial velocity, micro-Doppler, and range information. Key steps include array calibration, signal conversion and allocation, phase offset calculation and application, echo reception preprocessing, and mode matching analysis, achieving synergy between communication and sensing functions without requiring additional spectrum or dedicated sensors, thus improving sensing accuracy and system adaptability.