89 results about "Wind lidar" patented technology

The invention relates to a space coupling wind measurement laser radar real-time processing method. The method comprises the following steps of performing quality inspection and data preprocessing on acquired power spectrum data; carrying out radial speed extraction on the power spectrums of the plurality of beam directions and the plurality of range gates; constructing a space coupling constraint based on the space continuity of the atmospheric wind field and the geometric law of vector projection; solving a global objective function containing a data fitting item and a spatial constraint item through a joint optimization algorithm to obtain optimal wind field estimation; and outputting the three-dimensional wind field and performing quality evaluation. According to the method, the coupling relationship between different spatial position measurement values is established by using spatial redundant information obtained by multi-beam scanning of the wind measurement laser radar, the wind field inversion precision is improved through a global optimization method, the abnormal value suppression capability is enhanced, and the spatial continuity of an inversion result is ensured.

The invention relates to the technical field of airborne wind power measurement, and discloses an airborne wind measurement laser radar method and system. The method comprises the following steps: generating a scanning time sequence identifier and a path correction mark structure through scanning beat synchronization and stray light shielding processing; executing time-frequency demodulation and quality gating based on the back scattering signal to generate an observation wind speed initial value sequence; performing time alignment and motion compensation in combination with inertial navigation data, and generating a wind speed vector grid fragment through spatial interpolation and scanning geometric mapping; and finally, generating a configuration updating instruction structure through coordinate alignment and grid splicing. According to the invention, the precision and the anti-interference capability of wind field measurement in an airborne environment are effectively improved, and the data reliability and the system stability under a complex meteorological condition are remarkably enhanced through multi-source data fusion and a self-adaptive compensation mechanism.

The invention discloses a cabin type laser radar wind field detection method and system based on multi-beam expansion. The cabin type laser radar wind field detection method and system are low in cost, high in sampling density, small in fitting error and high in measurement precision. The method comprises the following steps: transmitting a plurality of groups of uniformly distributed radial detection wave beams through a cabin type wind measurement laser radar, and carrying out omnibearing scanning on a target wind field; collecting radial wind speed observation data of each group of beams, performing nonlinear fitting processing on the observation data based on a cosine fitting model, and determining a mapping relation between fitting parameters and azimuth angles; the real wind speed and wind direction of the target wind field are calculated through the fitting model; the system comprises a transmitting module (1), a receiving module (2), a fitting calculation module (3) and an output module (4). The method is applied to the technical field of wind measurement laser radars.

The invention relates to the technical field of wind energy resource assessment, and discloses a wind resource assessment method based on a millimeter wave wind finding radar. The method comprises the steps of collecting wind field data of a target area through a millimeter wave wind measurement radar and performing preprocessing to generate a standardized data set; inputting the data into a prediction model to obtain a wind energy distribution characteristic graph; generating a parameter set by adopting threshold segmentation based on the feature map, and dynamically constructing an evaluation function for simulation evaluation; synchronously collecting actual wind energy data, and calculating a deviation matrix between the actual wind energy data and a predicted value to quantify an evaluation error; performing parameter correction on the prediction model by using the error to obtain an optimized model; and finally, regenerating a feature map by adopting the optimization model and completing resource evaluation. According to the method, through online model correction and dynamic evaluation function construction, closed-loop optimization and data driving in the evaluation process are realized, and the accuracy of an evaluation result and the adaptability to a specific site are improved.

The invention discloses an aircraft wake flow identification method, system and device based on a wind lidar and a storage medium, and belongs to the technical field of radar detection. The method comprises the following steps: acquiring low-resolution laser radar detection data; calculating the central position of an aircraft trailing vortex pair according to the low-resolution laser radar detection data, and dividing the low-resolution laser radar detection data based on the central position of the aircraft trailing vortex pair to obtain an input region; and inputting the input region into a pre-trained aircraft wake flow super-resolution model to obtain a high-resolution reconstructed aircraft wake flow field. According to the invention, the problems of fuzzy wake flow structure, large vortex core position deviation and underestimation of vortex circulation caused by insufficient range resolution of a wind measurement laser radar in the prior art are solved, and the detection precision and parameter identification capability of the laser radar on aircraft wake flow are effectively improved.

The invention provides a three-dimensional scanning wind measurement laser radar system for an offshore rocket platform, which comprises a three-dimensional scanning laser radar, a shipborne attitude compensation module, a data processing module and a protective cover, and is characterized in that the three-dimensional scanning laser radar is used for emitting laser pulses and receiving original detection signals which are scattered by aerosol and penetrate through the protective cover; correcting the direction of the scanning head according to the attitude compensation signal, and outputting scanning track correction data; the shipborne attitude compensation module monitors the attitude change of the platform and generates a compensation signal to counteract the shaking influence; after the data processing module preprocesses the original signal, atmosphere three-dimensional wind field data is calculated in combination with scanning track correction data; the protective cover isolates tail flame heat radiation, strong light and seawater erosion and is used for guaranteeing detection stability; based on an offshore rocket platform scene, platform shaking is offset through shipborne attitude compensation, tail flame and seawater interference is isolated through a protective cover, the atmospheric three-dimensional wind field is calculated in combination with data processing, and the high-precision wind measurement requirement in the marine environment can be effectively met.

The invention provides a dynamic yaw error compensation method and system based on a cabin type wind lidar. The method comprises the following steps: firstly, acquiring three-dimensional wind field data at a preset distance in front of a wind turbine, simultaneously acquiring operation state parameters of the wind turbine, then extracting unstable transverse component and longitudinal velocity gradient distribution in an incoming wind flow direction, and then calculating a real-time yaw error amount caused by dynamic change of a wind field; and converting the real-time yaw error amount into a feed-forward compensation control signal by combining the dynamic response characteristic of the yaw system of the wind turbine, finally inputting the feed-forward compensation control signal into a main controller of the wind turbine, and adjusting an angle set value of the yaw system so as to complete yaw error compensation of the laser radar. According to the technical scheme, the alignment precision, the wind energy capturing efficiency and the operation stability of the wind generating set under the complex changing wind condition are improved, and high-precision and high-reliability compensation of the dynamic yaw error is achieved.

The invention relates to the technical field of laser radar meteorological detection, and discloses a single wind measurement laser radar three-dimensional wind field inversion method based on deep learning, and the method comprises the following steps: S1, obtaining original power spectrum data obtained by scanning and detecting an atmospheric wind field through a single Doppler wind measurement laser radar; s2, preprocessing the original power spectrum data, and extracting observation characteristic parameters at least comprising a radial wind speed, a signal-to-noise ratio and a spectrum width; s3, the observation characteristic parameters are input into a pre-trained deep learning wind field inversion model, and the deep learning wind field inversion model takes the observation characteristic parameters as input and outputs three-dimensional wind vectors of three-dimensional space grid points with the position where the laser radar is located as an original point. The three-dimensional wind vector is directly inverted from the radial observation data of the single laser radar through the deep learning model, cooperation of multiple devices is not needed, and the system cost and deployment complexity are remarkably reduced.

The present disclosure can be applied to the technical field of LIDAR. Provided are a method and apparatus for correcting a wind speed error of a multi-sea-state variable-integration wind LIDAR. The method for correcting a wind speed error of a multi-sea-state variable-integration wind LIDAR comprises: acquiring attitude data of a wind LIDAR and a signal-to-noise ratio of an echo signal; minimizing a relative error value between simulation information of a degree-of-freedom coordinate value and measurement information of the degree-of-freedom coordinate value to obtain correction information of the degree-of-freedom coordinate value; on the basis of the signal-to-noise ratio and a buoy amplitude, determining a target pulse accumulation count from a pulse accumulation count lookup table; on the basis of the target pulse accumulation count, accumulating an initial pulse power spectrum to obtain a target pulse power spectrum; on the basis of a center frequency corresponding to the maximum power density in the target pulse power spectrum and the correction information of the degree-of-freedom coordinate value, obtaining a corrected radial wind speed; and performing inversion on the basis of the corrected radial wind speed to obtain a target wind speed vector.

The application provides a wind field measurement method and system based on a wave glider laser wind radar, comprising: measuring a wind field radial velocity based on a laser wind radar carried on a wave glider platform, measuring attitude data by an IMU, and measuring speed data by a GPS; obtaining an installation external parameter of an optical axis of the laser wind radar relative to a ship body of the wave glider platform through installation calibration; fusing and solving the attitude data measured by the IMU and the speed data measured by the GPS to obtain attitude angles and motion parameters of the wave glider platform; performing attitude compensation on the wind field radial velocity according to the attitude angles and the installation external parameter to obtain a real measurement direction, and performing motion compensation on the wind field radial velocity in the real measurement direction according to the motion parameters; performing vector inversion and height mapping on the wind field radial velocity after the motion compensation to obtain a wind profile. The application realizes high-precision measurement of an air wind field above a sea surface to a height of 2 km.

This application discloses a method, apparatus, equipment, and medium for fusing atmospheric boundary layer wind speed data based on a hybrid-system wind-measuring lidar, relating to the field of computer technology. The method includes: simultaneously acquiring coherent wind measurement data and direct sounding wind data currently measured by the hybrid-system wind-measuring lidar during atmospheric boundary layer wind field observation; performing spatiotemporal registration and preprocessing on the coherent wind measurement data and direct sounding wind data; fusing atmospheric boundary layer wind speed data based on the preprocessed wind measurement data and a current preset fusion model to obtain the current fused target wind speed data; the preset fusion model is a model constructed based on a heterogeneous dual-branch deep neural network; and determining the target atmospheric boundary layer wind profile based on the hybrid-system wind-measuring lidar and the target wind speed data. This application can achieve high-precision wind profile fusion, improving the accuracy, precision, and environmental robustness of atmospheric boundary layer wind speed data fusion.

The application discloses a small three-dimensional wind measurement laser radar system with compact structure and good heat dissipation effect. The application comprises a swing rotating mechanism and a radar swing shell assembly installed on the swing rotating mechanism, wherein the radar swing shell assembly comprises a radar installation shell, a top cover, a bottom cover, a sealed front cover and a sealed rear cover are installed on the radar installation shell in sequence from top to bottom and from front to back, a ventilation cavity is formed between the top cover and the top of the radar installation shell, a plurality of air inlet holes are arranged at both ends of the top cover, a heat dissipation cooling cavity is arranged at the middle part of the radar installation shell, a plurality of cooling fans are arranged at the top of the heat dissipation cooling cavity and located in the middle part of the ventilation cavity, the bottom cover is provided with an air outlet hole in communication with the ventilation cavity, the inside of the radar installation shell is divided into a left cavity and a right cavity by the heat dissipation cooling cavity, and the radar heat dissipation components installed in the left cavity and the right cavity are attached to the two outer walls of the heat dissipation cooling cavity. The application is applied to the technical field of laser radars.

The invention provides an experimental simulation system of an equivalent wind shear wind field. According to the system, pulse light signals emitted by a wind measurement laser radar are simulated through different delay optical fibers to reach atmospheric stratification at different positions, then delayed pulse light is emitted to different positions of the side face of a rotating disc rotating at a constant speed, and echo signals obtain Doppler frequency shifts of different sizes due to different radial speeds; based on this, the change of wind speed in wind shear is simulated. A required equivalent wind shear wind field can be customized by adjusting the length of the delay optical fiber, the diameter of the turntable and the incident position of light on the side surface of the turntable. The system is simple in structure and low in cost, and can provide an equivalent wind shear wind field with accurate and controllable wind speed and abundant changes.

The invention discloses a high-wind-speed coherent laser wind-finding radar device, which comprises a seed laser, a plurality of cascaded acousto-optic frequency shift modules, a laser amplifier, a first optical switch, a laser transmitting and receiving detection module, a wind field inversion module and a wind speed identification and control unit, and is characterized in that the plurality of cascaded acousto-optic frequency shift modules realize frequency shift and beam splitting of the seed laser; the first optical switch selects the seed laser output by one acousto-optic frequency shift module as heterodyne detection seed laser; the wind field inversion module performs wind field inversion on the heterodyne beat frequency signal output by the balance detector to obtain a wind speed measurement result; the wind speed identification and control unit controls the frequency shift amount of the emitting seed laser and the frequency shift amount of the heterodyne detection seed laser, so that the difference value between the Doppler frequency shift amount caused by the wind speed and the frequency shift amount of the heterodyne detection seed laser is within the bandwidth range of the balance detector, and effective detection of the wind speed is achieved. According to the invention, the wind speed measurement range of the coherent wind lidar can be effectively improved, and the reduction of the wind speed measurement precision is not caused.

A coherent wind lidar echo signal spectrum simulation data generation method is provided, comprising: obtaining the bottom noise of the echo signal; removing the bottom noise from the echo signal spectrum data and counting the variance of the random noise; performing normalization processing on the random noise and performing Gaussian fitting to obtain the amplitude, Doppler shift and bandwidth of the echo signal; recording the Doppler shift difference between adjacent range gates to obtain the power spectrum peak energy of a single spectrum data and the correction amount of the distance; respectively counting the statistical parameters of the random variable, the power spectrum peak energy, the correction amount of the distance and the bandwidth; generating a group of wind speed profile graphs by using random walk and normal distribution characteristics of random variables, generating bandwidths under different range gates that satisfy the Lorentz distribution, power spectrum peak energies of a single simulated spectrum that satisfy the chi-square distribution, and distance correction amounts that satisfy the normal distribution; and generating a single simulated spectrum by a radar equation and repeatedly generating complete spectrum simulation data.

The application provides a wind measurement laser radar system and method based on quantum interference, a laser provides pulsed laser and continuous laser; the pulsed laser is emitted to a target airspace and a backscattering signal is received; the continuous laser is divided into first and second interference local oscillation lights; the second interference local oscillation light is adjusted to obtain quantum interference local oscillation light with intensity in a set proportion to the intensity of the backscattering signal; the backscattering signal is switched to a classical or quantum interference detection channel; classical interference detection data are obtained in the classical interference detection channel, and first wind speed information data are calculated according to the classical interference detection data; first and second single-photon detection data are obtained in the quantum interference detection channel, and second wind speed information data are calculated according to the first and second single-photon detection data; the first and second wind speed information data are spliced and spline interpolated to supplement the missing wind speed information data caused by the response time of the optical switch, and the wind speed information of the target airspace is obtained.

1. Name of the design product: wind measurement laser radar. 2. Use of the design product: the design product is an integrated coherent Doppler wind measurement laser radar, which is used for high-precision detection of atmospheric boundary layer wind field. 3. Design points of the design product: the overall shape of the product. 4. Picture or photo best indicating the design points of the design: perspective view 1.

The application discloses an aerosol correction method and system suitable for a hyperspectral resolution laser radar, and relates to the technical field of laser radar detection. Specifically, the method comprises the following steps: a first auxiliary detection channel and a second auxiliary detection channel specially added and containing iodine molecular absorption cells are used to filter out aerosol Mie scattering components in specific frequency laser echoes; pure first atmospheric temperature data is obtained based on data inversion of the auxiliary detection channels; atmospheric aerosol backscattering ratios are calculated in combination with reference channel data; the backscattering ratios are used to correct wind speed and temperature inversion models of the laser radar, and then corrected atmospheric wind speed and temperature data are obtained. The application aims to expand the minimum detection height of a hyperspectral resolution Rayleigh temperature and wind measurement laser radar by accurately quantifying and eliminating aerosol interference, and to realize high-precision synchronous measurement of wind speed and temperature in low-altitude and aerosol-rich areas.

The invention provides an airborne wind lidar dynamic adaptive attitude-position cooperative compensation system and method capable of dynamically adapting to a flight state and accurately coupling attitude and position interference. The system comprises a GNSS (Global Navigation Satellite System) positioning module (1), an MEMS-IMU (Micro-electromechanical System-Inertial Measurement Unit) attitude sensing module (2), a dual-stage coordinate conversion module (3), a dynamic speed resolving module (4), a self-adaptive cooperative compensation module (5) and a laser radar wind measurement module (6), the method comprises the following steps of S1, multi-source data synchronous acquisition, S2, ECEF coordinate system conversion, S3, ENU coordinate system conversion, S4, dynamic speed calculation, S5, dynamic weight adaptive compensation, and S6, data output and feedback storage. The method is applied to the technical field of wind measurement laser radars.

The present application relates to a kind of wind lidar real-time processing methods of space coupling, comprising the following steps: quality inspection is carried out to the power spectrum data obtained and data pre-processing is carried out;Radial velocity extraction is carried out to the power spectrum of multiple beam directions, multiple distance gates;Based on the spatial continuity of atmospheric wind field and the geometric law of vector projection, construct spatial coupling constraint;By joint optimization algorithm, the global objective function containing data fitting term and space constraint term is solved, and the optimal wind field estimation is obtained;Output three-dimensional wind field and carry out quality assessment.This method uses the spatial redundant information obtained by wind lidar multi-beam scanning to establish the coupling relationship between the measurement values at different spatial positions, and improves the wind field inversion accuracy, enhances the abnormal value suppression ability and ensures the spatial continuity of the inversion result by using the global optimization method.

The invention relates to the technical field of laser radars, in particular to an omnidirectional slant visibility prediction method and device based on a laser radar. The method comprises the following steps: determining a laser emission path according to a measurement area, and respectively acquiring scattered echo signal data, slant visibility data and wind data under the same range gate on the laser emission path through a micro-pulse laser radar and a coherent Doppler wind measurement laser radar; storing and processing the acquired data; and inputting the processed data into a vector autoregression exogenous variable prediction model to obtain a predicted slope visibility value at a future moment. Meanwhile, the invention discloses a device for executing the method, and the method and the device for predicting the omnidirectional slant visibility based on the laser radar are adopted, so that the slant visibility on a laser emitting path can be predicted, and technical support is provided for follow-up.

The invention aims to provide a wind measurement laser radar data immersion visualization system and method based on a VR technology. The system comprises a multi-source data access module (1), a wind field vector fusion processing module (2), a VR scene construction module (3), an immersive interaction module (4), a data synchronization and storage module (5) and an alarm linkage module (6). The method comprises the following steps that S1, the multi-source data access module synchronously collects three paths of data and transmits the data to the wind field vector fusion processing module, S2, the wind field vector fusion processing module carries out preprocessing, reconstruction and time-space registration on the data and outputs three-dimensional scene data, S3, the VR scene construction module renders a three-dimensional virtual scene, and S4, the VR scene construction module carries out VR scene reconstruction. S4, the immersive interaction module receives a gesture or voice instruction of a user; and S5, the data synchronization and storage module caches and persistently stores whole-process data in real time. The method is applied to the crossing field of laser radar data processing and virtual reality technology.

This invention discloses a coherent wind-measuring lidar and its wind measurement method, relating to the field of lidar. The lidar includes a light source, a beam splitter, a modulator, an optical amplifier, a circulator, an optical transceiver module, and a signal detection and processing module. The light source is coupled to the beam splitter; the optical amplifier and modulator are both coupled to the beam splitter; the modulator is coupled to the signal detection and processing module; the optical amplifier is coupled to the circulator; and both the optical transceiver module and the signal detection and processing module are coupled to the circulator. The output beam of the light source is split into a probe beam and a local oscillator beam by the beam splitter. The probe beam is amplified by the optical amplifier and output to the target. The echo beam returned from the target is incident on the signal detection and processing module, and the local oscillator beam is modulated into pulsed light and then incident on the signal detection and processing module. The signal detection and processing module performs mixing, conversion, and signal processing on the received signals to obtain the target information. This invention can reduce the manufacturing cost of lidar and improve the accuracy of wind measurement.

The invention discloses an aerosol correction method and system suitable for a high-spectral-resolution laser radar, and relates to the technical field of laser radar detection. The method specifically comprises the following steps: filtering aerosol mie scattering components in specific-frequency laser echoes by using a first auxiliary detection channel and a second auxiliary detection channel which are specially added and comprise iodine molecule absorption cells; obtaining pure first atmospheric temperature data based on data inversion of the auxiliary detection channel; calculating the back scattering ratio of the atmospheric aerosol in combination with the reference channel data; and correcting a wind speed and temperature inversion model of the laser radar by using the backscattering ratio so as to obtain corrected atmospheric wind speed and temperature data. The invention aims to realize high-precision wind speed and temperature synchronous measurement of low altitude and aerosol-enriched areas by accurately quantifying and eliminating aerosol interference and expanding the lowest detection height of the high-spectral-resolution Rayleigh temperature and wind measurement laser radar.

1. Name of the product in this design: Portable ground-based wind-measuring lidar (Molas B1000). 2. Application of this design: Suitable for high-precision wind field measurement in lightweight, flexible deployment scenarios. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key features: the front view.

1. Name of the product in this design: Coherent Doppler wind-measuring lidar. 2. Application of this design: This design is for use as a lidar for measuring wind speed. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The application relates to the technical field of signal processing, and discloses an intelligent anti-interference signal processing method and system for a portable laser wind measurement radar, the method comprising the following steps: constructing a physical-inspired feature network, outputting a feature vector and mapping the feature vector to a low-dimensional physical parameter vector, constructing a composite loss function according to the low-dimensional physical parameter vector; constructing a raindrop particle size distribution according to the low-dimensional physical parameter vector, calculating the backscattering cross section and the terminal falling velocity of each particle, obtaining a Doppler frequency shift according to the terminal falling velocity, and obtaining the spectrum of an interference signal according to the backscattering cross section and the Doppler frequency shift; obtaining a pure wind field signal according to the spectrum of the interference signal and a mixed spectrum, and obtaining a horizontal wind vector according to the pure wind field signal. The application realizes high-precision wind speed inversion.

The application discloses a miniaturized spaceborne wind measuring interferometer device based on DASH and belongs to the technical field of optical mechanical structures. In order to solve the problems of complex structure and large volume of the existing spaceborne wind measuring interferometer, the device comprises an electronic box, a front light collecting lens group, a mounting bottom plate, a rear projection lens group, a CCD camera, a collimating lens group, a support frame one, a cubic prism, an interference unit, a support frame two, a krypton lamp, a prism support and a camera support. The front light collecting lens group comprises a lens one, a folding mirror one, a folding mirror two and a lens two which are sequentially arranged along an optical axis. The rear projection lens group comprises a lens three, a folding mirror three and a lens four which are sequentially arranged along the optical axis. The collimating lens group comprises a lens five and a folding mirror four which are sequentially arranged along the optical axis. In the device, the folded light path is folded through the folding mirror group for multiple times. The device occupies a small volume, the internal space utilization rate of the spaceborne wind measuring interferometer load is improved, the weight of the instrument is smaller, the carrying cost is reduced, and the instrument is more stable and reliable during work.

The present application relates to the technical field of laser wind measurement radar, and discloses a laser wind measurement radar blind area optimization and compensation method and system.The method comprises the following steps: obtaining echo signal distribution data, determining a blind area spatial range based on a signal-to-noise ratio discrimination criterion, extracting a non-blind area boundary layer wind field gradient feature, physically reconstructing a blind area wind field in combination with an atmospheric turbulence continuity constraint condition, generating a fusion wind field result, and adjusting radar parameters and correcting the discrimination criterion according to the fusion result.The present application solves the technical problem of the existence of a measurement blind area of a laser wind measurement radar, and improves the near-surface wind field measurement precision and integrity.

1. The name of the design product: mine wind measurement laser radar. 2. The use of the design product: used in close-range wind measurement scene such as coal mine. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.