46 results about "Wind profiler" patented technology

The invention discloses a method for acquiring a three-dimensional wind field by using a wind profiler radar. The method is characterized by comprising the following steps of: firstly, acquiring radar-based data by using the wind profiler radar; secondly, feeding the acquired data into a computer for preprocessing; thirdly, picking a spectrum center of each library by the preprocessed data near wave beam and the distance library and calculating parameters; and fourthly, generating a three-dimensional same field by adopting a defined amount synthesizing method according to the calculated parameters. The invention solves the problems that a power spectrum center cannot be picked correctly in the wind profiler radar wind field and also solves the problem of how to effectively synthesize the wind field. The invention greatly reduces the interference of the inversed wind field information by the outside, effectively improves the data acquisition rate and accuracy of the wind profiler radar, further plays the performance of the wind profiler radar and can be widely applied to wind profiler radar data processing software systems in a convection layer and a boundary layer.

The invention relates to a turbulent current target detection method of a wind profiler radar. The method comprises the following steps of inputting a power spectrum of the wind profiler radar; performing pretreatment on the input power spectrum; determining noise level by a segmental averaging method; performing preliminary detection on the power spectrum, wherein the preliminary detection comprises amplitude detection, spectrum width detection and envelope detection; performing classification detection on the power spectrum, wherein the classification detection comprises exploratory excision of a spectral line, classification judgment according to the excision result and spectral peak separation according to categories; performing speed correction on a turbulent current target power spectrum; performing continuous modification on the turbulent current target power spectrum; and performing spectral moment calculation and outputting a result. According to the method disclosed by the invention, the target detection quality of the wind profiler radar can be improved.

The invention relates to a method for removing noises of a wind profile radar based on Hilbert-Huang transform. Based on a noise removing processor of the wind profile radar, the processor comprises an improved empirical mode decomposition module, a Hilbert transform module and a follow-up signal processing module. The method comprises the following steps that: 1) the noise removing processor of the wind profile radar receives an echo signal and utilizes the improved empirical mode decomposition module to obtain a series of natural mode function components of the echo signal; 2) the Hilbert transform is performed on each natural mode function component through the Hilbert transform module so as to obtain an energy spectrum value of the original signal; and 3) the follow-up signal processing module transforms the energy spectrum value of the original signal to obtain wind profile radar data after removing the noises. The invention has the following beneficial effects: the method has good adaptability, can obviously remove non-stationary interference, such as noises, and can especially and effectively remove the aliasing influence and the boundary effect of the adjacent frequencies.

The invention discloses a method for determining the noise power of a wind profile radar. The method comprises the steps of introducing a test factor which is calculated according to a measured power spectrum and used for reflecting signal components according to noise statistical characteristics, when all the signals are noise, determining the specific value of the test factor by use of a window function used in generating the power spectrum and the average times of the power spectrum, starting an iteration process and obtaining a preset power density threshold value by use of a golden section method according to the maximum and the minimum of the measured power spectrum of each range gate, during each iterative computation, reducing the spectral line of which the amplitude is higher than the preset power density threshold value to the preset power density threshold value, thereby obtaining a new power spectrum, and determining the signal components of the new power spectrum by use of the test factor, and if meteorologic signal components still exist, continuing iteration until no meteorologic signal component exists, and remaining the left power spectrum as the noise power spectrum for noise power calculation. The method for determining the noise power of the wind profile radar is applicable to the noise power estimation of radar signals.

A neural network process for improving wind retrievals from wind profiler measurements is described. In this invention, a neural network is trained to retrieve (missing or incomplete) upper level winds from ground based wind profiler measurements. Radiosonde measurements in conjunction with wind profiler ground measurements for specific geographical locations are used as training sets for the neural network. The idea is to retrieve timely and spatially continuous upper level wind information from (fragmented or incomplete) wind profiler measurements.

A platform for a handheld wind profiler includes a housing containing a three-axis magnetic compass module generating a compass signal, including the orientation of the housing relative to magnetic north at a time. A two-axis inclinometer module generates a inclinometer signal including the orientation of the housing relative to a horizontal plane at the time. A GPS module generating a GPS signal indicating a time and position solution including a terrain position of the housing based upon the time. A processor receives a first velocimeter signal at the time from at least one laser Doppler velocimeter. The velocimeter signal includes a first radial velocity of a first wind-borne aerosol and a first orientation of the at least one laser Doppler velocimeter relative to the housing. The processor resolves the first velocimeter signal to determine an orientation of the at least one laser Doppler velocimeter relative to the terrain position.

The invention relates to a wind-tunnel wind profiler and a control method thereof. The wind-tunnel wind profiler comprises a data acquisition portion, a wireless data transmission portion and a control processing device. The data acquisition portion comprises a plurality of hot-film probes and a data acquisition card. The wireless data transmission portion comprises a wireless transmitting deviceand a wireless receiving device. The hot-film probes are connected to the data acquisition card. Wind speed signals acquired by the hot-film probes are converted into voltage signals after being calibrated, and then the voltage signals are transmitted to an Analogue-to-Digital (A/D) converter in the data acquisition card, so that the data acquisition card completes the acquisition of the wind speed signals output by the hot-film probes and transmits the wind speed data acquired to the wireless transmitting device; next, the wireless transmitting device transmits the wind speed data received to the wireless receiving device in a wireless way; and the control processing device is connected to the wireless receiving device. The wind-tunnel wind profiler has the characteristics of being simple in structure, feasible in performance, low in cost, convenient for carrying and installation, simple in field wire connection, and flexible and reliable in use.

An airborne wind profiler for an aloft aircraft includes a system bus for receiving a GPS signal including a time and position solution and an attitude signal representing heading, roll, pitch, and yaw of the aircraft. An optical module includes at least one laser Doppler velocimer including an mount allowing the at least one laser Doppler velocimeter to articulate in at least two axes, thereby to orient the laser Doppler velocimeter below a horizon to generate at least one first velocimeter signal. The velocimeter signal includes at least one first radial velocity of a first wind-borne aerosol and a first orientation of the at least one laser Doppler velocimeter relative to the aircraft. A processor module receives the first velocimer signal at the time from at least one laser Doppler velocimeter.

The invention relates to the field of atmospheric turbulence energy detection, and particularly relates to an energy detection system and an energy detection method for the atmosphere turbulence of awind profile radar. The system comprises a digital intermediate-frequency receiver used for acquiring an atmospheric turbulence radar echo signal, carrying out digital processing on the radar echo signal to obtain time-domain data, and sending the time-domain data to a first storage module; the first storage module used for storing the time-domain data sent by the digital intermediate-frequency receiver; and a signal processing module used for carrying out signal processing on the time-domain data in the first storage module, generating atmospheric turbulence echo power spectrum data and sending the atmospheric turbulence echo power spectrum data to a second storage module. According to the invention, based on the system and the method, the energy and the friction speed of the atmosphericturbulence can be observed, detected and processed, and data can be obtained in real time. Meanwhile, obtained data are accurate and high in precision. The atmospheric turbulence can be truly restored. Therefore, the system and the method can be applied to the fields of scientific research, atmospheric observation, agricultural application and the like.

The invention relates to the technical field of wind profiler radar waveform design, signal processing, waveform generation method and frequency synthesizer circuit. The invention first provides a wind profiler radar phase encoding method and circuit based on Frank codes. The method comprises the steps that the number M of encoding sub-pulses is calculated; a time domain accumulation number Nc is calculated; an encoding cycle number N is selected; the time domain accumulation number Nc and the encoding cycle number N are adjusted to form an encoding matrix FN'*M; and the encoding matrix FN'*M is used to carry out phase encoding of transmitted pulses of an encoding cycle. A wind profiler radar is used for detecting wind direction, wind speed, echo intensity and other meteorological information of an atmospheric wind field. In the prior art, two-phase complementary codes, Walsh function codes or other phase encoding technologies are used to realize width pulse energy and narrow pulse resolution at the same time. The encoding method and circuit, which are provided by the invention, use ordinary pulse or pulse burst waveform, have the advantages of low distance sidelobe and flexible selection of the number of the sub-pulses, can be used to prevent point frequency radio interference, and are suitable for a variety of wind profiler radars.

The invention discloses a method for suppressing interference on wind profile radar. The method includes steps of firstly, selecting the optimal fractional order alpha<opt>; secondly, carrying out fractional Fourier transformation on coherent accumulative time-domain data under the condition of the optimal fractional order alpha<opt> to obtain corresponding fractional-domain signal forms; thirdly, determining clutter interference detection thresholds on the basis of statistic characteristics of all order moments of received signals in fractional-domains; fourthly, carrying out inverse fractional-domain Fourier transformation on suppressed data to obtain clutter-removed time-domain wind profile radar data so as to completely suppress and process clutter. The method has the advantages that the influence of wireless electric signals on the wind profile radar can be reduced after the received signals of the wind profile radar are processed by the aid of the method, the signal-to-noise ratios can be obviously improved, and the method is high in practicality.

The present invention relates to a method and apparatus for pointing the beams (63–67) of a wind profiler comprising a stationary antenna matrix (61) with several individual antenna elements (62). According to the method an input signal is fed to the antenna matrix (61), and the phase of the input signal is adjusted for the individual antenna elements (62) in order to point the beam (63–67) of the profiler. In accordance with the invention separate feeder lines for each beam are used for feeding the signals to the antenna elements (62), and the phase differences between the individual antenna elements (62) are controlled with hybrid coupler elements (3, 4).

The invention discloses an atmosphere waveguide monitoring method employing a wind profile radar and an RASS, and the method can effectively monitor a surface and a lifting waveguide through employing the wind profile radar and the RASS, and gives the type of an atmosphere waveguide and the feature value of the atmosphere waveguide. In an actual application process, the method can continuously monitor the surface and the lifting waveguide without air sounding equipment, does not cause the loss of a device, and reduces the measurement cost. Compared with a conventional air sounding method, the method is simple in operation, and is high in measurement speed.

The invention provides a wind profiler radar based on an interference algorithm. The radar comprises a transmitting antenna and multiple groups of receiving antennas. The transmitting antenna is independently arranged, and each group of the receiving antennas is arranged in a triangle. Echo signals received by each group of antennas are orthogonally sampled to obtain I and Q orthogonal signals. Instep (1), two horizontal components of an atmospheric turbulent moving speed are obtained by using an interference algorithm. In step (2), a Doppler effect is obtained by using Fourier transform processing, and the vertical velocity and direction of atmospheric turbulence are obtained. According to the invention, the processing is carried out by using phase information of the signals, a beam doesnot need to be scanned, the time period of wind field acquisition is obviously shortened and is only 20% of the time period of an existing wind profile radar, since the beam does not need to be scanned, a beam control system of an existing wind profile and a larger number of phase shifters are not needed, the manufacturing cost of the antennas is reduced, and the installation requirements of theantenna are reduced.

The invention relates to a method for quickly positioning data in a visualization interface of ocean spatio-temporal data. The method comprises the following steps: pre-processing data of a wind profiler and storing the processed data in a database; reading data from the database, and storing the data structurally and locally; visualizing spatio-temporal data with a cartographic tool; establishinga local index cache set, storing a spatial dimension index field in the standard data set in a "re-classification" manner according to possible indexes to be inquired, and establishing a mapping relationship between the indexes and data to be retrieved; and receiving a query request from the visualization interface, and transforming the query request into a query index of a preset format.

The invention provides a method used for verifying wind speed and wind direction detection data accuracy of a boundary layer wind profiler radar. The method comprises the step that S1, from a wind speed and wind direction measuring device carrying a tethered balloon, wind speed and wind direction data of a certain height in a long time above detection area of the wind speed and wind direction measuring device are acquired; S2, the boundary layer wind profiler radar is arranged in the detection area, and real-time wind profiler data at the same height as the wind speed and wind direction measuring device are acquired from the boundary layer wind profiler radar; and S3, mean square error between wind profiler data at different heights and data of a wind speed and wind direction meter is calculated, so as to verify the wind speed and wind direction detection data accuracy of the wind profiler radar at a certain height. According to the invention, a tethered balloon system can be quickly arranged; the launch height covers the detection height of a conventional boundary layer wind profiler; the operation of height lift is flexible; wind speed and wind direction data in a fixed range can be accurately measured for a long time, and the accuracy is high; a lot of modification is prevented; the verifying cost is reduced; and the accuracy of data verifying is improved.

The invention relates to a wire winding profiler which is used for assisting to wind a wire of a lamp tube on a post head of a circuit board. The wire winding profiler comprises a profiling bracket, two profiling doors and two profiling rockers. The profiling bracket is an integral structure piece consisting of a top plate and two lateral plates, the top plate extends forwards and the front end of the top plate is provided with two door frames extending forwards, a groove is formed between the two door frames, and a positioning pin roll and an antipositioning pin roll are connected between the two lateral plates. The two profiling doors are respectively rotatably arranged at two sides of the front end of the top plate of the profiling bracket and are sealed in the front of the two door frames. The two profiling rockers are rotatably arranged on the positioning pin roll between the two lateral plates of the profiling bracket. The wire winding profiler can realize mechanical operation for winding the wire of the lamp on the post head of a circuit board by matching with a wire winding rod, ensures the winding quality, greatly improves the production efficiency, and lowers the production cost.