106 results about "Radar beam" patented technology

The invention relates to a radar synthetic wind speed resolving method, device and equipment and a storage medium, and is applied to the field of radar speed measurement, the radar synthetic wind speed resolving method comprises the steps that radar sight wind speed and the rotation angle of a radar are acquired, and the rotation angle is the angle of a radar roll angle; performing radar beam azimuth calculation according to the rotation angle to obtain a radar beam vector; and performing synthetic wind speed calculation according to the radar sight wind speed and the radar beam vector, and generating scalar wind speed and wind direction. The method has the technical effect that the calculation accuracy of the synthetic wind speed is improved.

The invention discloses a wind measurement radar attitude angle depolarization estimation and correction method, which comprises the following steps: acquiring original wind field data acquired by a wind measurement radar, including a horizontal wind speed, a horizontal wind direction and a vertical wind speed; performing quality control on the original wind field data, removing invalid samples and screening effective wind speed data; constructing an error model based on the ratio of the vertical wind speed to the horizontal wind speed, and establishing a mapping relation between the ratio and the horizontal wind direction; estimating the attitude deflection angle of the radar by adopting a robust fitting method, including data density weighting and robust fitting processing, so as to improve the estimation stability and the anti-interference capability; based on the estimated attitude deflection angle, performing coordinate transformation on a radar beam direction, correcting a wind field inversion result, and outputting corrected three-dimensional wind speed data; the wind speed measurement precision is improved.

A radar-enabled wireless communication device is configured to communicate with a wireless communication network and performs radar transmissions determine whether there are any neighboring wireless communication devices that are vulnerable to interference from the radar transmissions and, if so, adapt radar transmissions in the affected radar beam directions or transmit assistance information enabling the vulnerable devices to mitigate or avoid the interference.

The invention discloses a phased array radar signal processing system with deterministic delay, and relates to the technical field of semiconductors, the system carries out equal-length wiring design on a link in a hardware level, a timestamp marking circuit is embedded in the link, a core processing module carries out multi-channel data alignment based on timestamp marks in a software level, and the data alignment is carried out based on the timestamp marks. The multi-channel data transmission delay deviation is solved through elastic buffer control, the most reasonable buffer depth and release phase parameters are determined through calculation, and therefore the buffer delay is minimized, the system achieves deterministic minimum delay through software and hardware collaborative design, data alignment and quick response are guaranteed, and the system is suitable for large-scale popularization and application. Low-delay and high-consistency transmission and processing of multi-channel signals are achieved, so that high-precision pointing control of radar beams and time consistency of multi-target tracking are achieved, and the high-synchronization and low-jitter requirements of phased array radar for high-speed signal processing are met.

The invention relates to the technical field of intelligent sensors, in particular to an unmanned aerial vehicle track intelligent tracking method based on a millimeter-wave radar, which comprises the following steps: receiving echo signals collected by the front end of the millimeter-wave radar, carrying out constant false alarm rate detection and Doppler frequency shift extraction on the echo signals, generating an unmanned aerial vehicle target space coordinate set, and carrying out target tracking on the unmanned aerial vehicle. And mapping the target space coordinate set of the unmanned aerial vehicle to a three-dimensional Euclidean space. According to the method, a non-convex optimization objective function containing beam switching time cost and precision constraint is constructed, and mathematical optimal solution of radar beam resources is realized. The generated adaptive scheduling instruction is used for adjusting the pulse repetition frequency and the beam residence time, it is ensured that radar front-end parameters dynamically evolve along with the target state, overall centroid tracking is emphasized for rigid body formation so as to save resources, independent high-frequency refreshing is emphasized for discrete targets so as to ensure the precision, and the accuracy is improved. And the continuity and robustness of trajectory tracking of the unmanned aerial vehicle in a complex electromagnetic environment are improved.

The invention provides a distributed formation SAR satellite group multi-angle scattering characteristic spectrum measurement system and method. The distributed formation SAR satellite group multi-angle scattering characteristic spectrum measurement system comprises a satellite formation subsystem, a load collaborative observation subsystem, a signal processing subsystem and a spectrum construction subsystem, the satellite formation subsystem is used for constructing an initial satellite formation and dynamically reconstructing the initial satellite formation; the load collaborative observation subsystem is used for collaborative observation of multiple satellites on the same area; the signal processing subsystem is used for realizing distributed holographic imaging processing of multi-satellite echo signals; and the map construction subsystem is used for constructing a multi-dimensional space map. According to the invention, through the concentric ring-spiral composite formation configuration and in combination with the real-time dynamic optimization algorithm, continuous full coverage of the azimuth angle and the pitch angle of the three-dimensional space of the ground target is realized, and highly coincident irradiation of multi-star radar beams on the same ground feature area is ensured; the bottleneck of scattering feature capture caused by traditional formation angle discretization is fundamentally broken through.

The invention discloses a beam synchronization method and device for a double-station radar of an unmanned aerial vehicle, and belongs to the technical field of electromagnetic scattering characteristic measurement. The method comprises the following steps: firstly, establishing an east-north-sky coordinate system by taking the position of a host as a reference point, and acquiring initial position parameters of a slave and a test area under the coordinate system; based on the movement speed of the host, the initial position of the test area and a preset geometric constraint, determining the starting point position of a host radar, and initializing the radar beam pointing of the slave; when the host reaches the starting point position, calculating the current position of the test area according to the real-time pose parameter of the host, the preset geometric constraint and the preset bistatic angle; and in each period after the host radar is started, updating the position of the test area and the radar beam direction of the slave according to the pose change of the host and the preset geometric constraint, so that the radar beams of the host and the slave are kept synchronous. According to the scheme, adaptive beam synchronization of the unmanned aerial vehicle double-station radar in a dynamic flight environment is realized.

1. Name of the product in this design: RCS size adjustment device based on Luneburg lens (2). 2. Purpose of this design: To enable the Luneburg lens to reflect radar beams by controlling the position of the reflective surface. 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 rendering 1.

The application discloses a reflectivity factor weighting comparison method and system based on radar beam volume overlap rate, comprising the following steps: S1. According to the comparison distance library information, an elliptical table model for representing the comparison distance library is established in space, the distance resolution, the elevation angle and the azimuth angle of the beam are comprehensively considered, a beam volume matching model is established to obtain the beam space sampling volume of the distance library; S2. Based on Monte Carlo simulation, a large number of random points are generated, and different beam volume overlap rates are calculated according to the regional labeling method to quantify the matching degree of the radar beam space; S3. The reflectivity factor corresponding weight of each matching region is given through the volume overlap rate, the final weighted error, the weighted standard deviation and the weighted correlation coefficient are calculated by weighting, and the radar performance difference is evaluated; the application can accurately calculate the matching degree of different radar distance libraries, quantitatively evaluate the spatial matching degree and perform weighted calculation, improve the precision of radar consistency comparison, and calibrate the radar more accurately.

The application relates to the technical field of unmanned aerial vehicle swarm detection, and discloses an unmanned aerial vehicle swarm detection method and system based on multilayer early warning, which comprises the following steps: collecting radar signal and photoelectric signal data and unmanned aerial vehicle speed, generating initial data by unified mapping according to preset state transition and observation matrix, making prediction-residual correction by combining preset noise parameters to obtain a dynamic trajectory, smoothing the trajectory, statistically analyzing the trajectory according to height granularity, adaptively clustering to form layered height intervals, identifying dense clusters according to distance radius and core points when the number of layers exceeds a threshold, extracting cluster centers and density gradients, constructing a probability inference structure according to the above and the speed, fusing prior formation, wind disturbance and delay, outputting a dynamic threat level, calling a pre-generated heat map to position a high-threat area when the threat exceeds a threshold, combining airspace safety constraints and speed to predict a future trajectory, updating a situation, adaptively configuring radar beams and coverage, and outputting real-time detection data. The method can realize reliable airspace management.

A computer-implemented radar simulation method is provided for directing a radar beam to a target. The method includes receiving target position from the target; computing target coordinates in a select frame of reference; inserting random noise error into the target coordinates as accuracy degradation to represent at least one radar performance characteristic; providing the accuracy degradation into the frame of reference; and directing the radar beam by the accuracy degradation towards the target.

The invention discloses a bridge inhaul cable force monitoring method and system based on a hybrid beam control scanning radar, and the method comprises the steps: achieving the large-range mechanical coarse adjustment of a radar beam through a servo holder, and covering a whole bridge inhaul cable; and then, a phased array or digital beam forming technology is utilized to carry out electronic fine tuning on beam pointing and adaptively optimize the beam shape, so that accurate aiming of the beam on the inhaul cable and vibration signal acquisition with an extremely high signal-to-noise ratio are realized. And finally calculating the cable force through spectrum analysis. According to the invention, high-precision, high-efficiency and automatic polling monitoring of a plurality of inhaul cables by a single radar is realized, the problems of high cost, low efficiency, limited precision and the like in the prior art are solved, and reliable technical guarantee is provided for safe operation of bridges.

A calibration method for operating a CW short-range radar system in obtaining calibrated intermediate frequency in-phase and quadrature outputs comprises measuring at least one reflective static calibration target at a plurality of at least four different target ranges and processing the received CW radar measurement signal by performing a quadrature down-conversion of the received CW radar beam intensity and phase to obtain measured intermediate frequency in-phase outputs and intermediate frequency quadrature outputs. These are used to solve a system of equations for calibration parameter values including an amplitude mismatch a phase mismatch between the quadrature signals, and individual DC offsets of the quadrature signals.

The invention discloses a frequency-sweep rada beam directional diagram measurement system, and the system comprises a high-precision holder which is provided with a frequency-sweep rada; the variable-frequency emission source is arranged on a bracket which is as high as the frequency sweeping radar; the first synchronization device is connected with the frequency-sweeping mine and used for starting the frequency-sweeping mine and sending a synchronization signal to the second synchronization device at the same time; and the second synchronization device is connected with a variable-frequency emission source, and is used for adjusting the emission frequency of the variable-frequency emission source in response to the synchronization signal and controlling the variable-frequency emission source to emit a variable-frequency signal, so that the frequency sweeping rada generates beam pattern data of a corresponding frequency after receiving the variable-frequency signal. Through the beam pattern data generated by processing the variable frequency signals corresponding to different frequencies emitted by the variable frequency emission source through the frequency-sweep rada, multiple beam patterns of the frequency-sweep rada can be rapidly and efficiently measured, and the measurement efficiency of the multiple beam patterns is improved.

This invention discloses a method for beam control of unconventional radar arrays. The method includes establishing a reference benchmark and initializing array parameters based on the unconventional radar array, determining core radar control parameters, determining radar beam control parameters, determining complex weighting coefficients for radar digital receiver multi-beam synthesis, and completing the radar array digital receiver multi-beam synthesis. This solution is applicable to unconventional phased array antennas with subarray-level random rotation and subarray-level random misalignment, and is compatible with beam control of conventional arrays. It has low computational complexity and introduces beam pointing accuracy error ≤0.01° and phase error ≤1° (Ku band and below), placing it at an industry-leading level. It is applicable to various phased array antenna architectures and has promising application prospects.

The present application belongs to the technical field of radar imaging and unmanned system integration, and particularly relates to a synthetic aperture radar imaging system and a UAV array SAR image detection method. The UAV array SAR image detection method comprises: S1, issuing an array arrangement form, trajectory design parameters and an imaging mode to a master control UAV; S2, the master control UAV calculates the position, spacing, flight path and beam direction parameters of each UAV; S3, baseband excitation parameters, synchronization signals and attitude control instructions are issued to the UAV detection array; S4, the UAV detection array synchronously transmits radar beams and receives target echoes, and the echo data is returned to a signal processing node; S5, the signal processing node performs coherent processing and SAR image signal processing, and returns the target image to the ground system. The present application realizes coherent synthesis of multiple front-end UAV received echoes and high-resolution image generation, and the image result can be used for tactical identification or geographic situation awareness display.

The utility model discloses an angle-adjustable radar wave velocity measurement device, which comprises a radar wave velocity meter, a positioning assembly and an aluminum plate, the lower end of the aluminum plate is fixedly connected with two mounting plates, a main shaft is rotatably connected between the two mounting plates, one end of the main shaft is fixedly provided with a bracket, and the main shaft is provided with a horizontal adjusting mechanism for adjusting the horizontal angle of the bracket. One end of the support is rotationally connected with a shell, a pitching adjusting motor is installed in the shell, the radar wave current meter and the positioning assembly are installed in the shell, and the aluminum plate is provided with a plurality of fixing assemblies used for being connected with a cableway. According to the utility model, the horizontal angle and the pitching angle of the radar wave flow velocity meter can be adjusted in real time according to the change of the water level, so that the radar wave beam and a lead fish monitoring point can be positioned on the same vertical line, the water flow velocities at different water depths are compared, and the monitoring precision of the water flow velocity is improved.

Measuring setup for carrying out tests on the settings of vehicle components, ➢ wherein the measuring setup includes a vehicle positioned in the measuring setup, ➢ wherein the measuring arrangement comprises a measuring device (1) having a measuring surface (11), ➢whereby the measuring surface (11) is designed to measure the intensity distribution of radar beams incident on the measuring surface (11), ➢ wherein the measuring device (1) is movable in a horizontal plane in the measuring arrangement, ➢ wherein the measuring device (1) has a bearing element, ➢ wherein a vertically extending column (3) is supported on the support element, ➢ wherein guide rails (9, 10) running parallel to the column (3) in a holding plane can be attached or are attached (5, 6) such that the longitudinal directions of the guide rails (9, 10) running parallel to the holding plane are oriented perpendicular to the longitudinal direction of the column (3) in a neutral position, ➢whereby the measuring surface (11) has guide elements in the area of ​​a side edge, by means of which the measuring surface (11) can be attached to the guide rails (9, 10) which run parallel in a holding plane, ➢ that the measuring surface (11) is movable along these guide rails (9, 10), and ➢ that the surface normal of the measuring surface (11) runs parallel to the longitudinal direction of the parallel guide rails (9, 10) when the measuring surface (11) is attached to the guide rails (9, 10) by means of the guide elements, ➢ wherein the measuring device (1) has an optical measuring unit (12) by means of which the measuring device (1) of the measuring arrangement can be positioned relative to the vehicle positioned in the measuring arrangement in such a way that the axis of symmetry of the vehicle can be measured and displayed via symmetry points of the body of the vehicle positioned in the measuring arrangement for carrying out tests, ➢ wherein by measuring and displaying the optical measuring unit (12) the measuring device (1) in the measuring arrangement can be aligned so that the longitudinal directions of the two parallel guide rails (9, 10) run parallel to the direction of the axis of symmetry of the vehicle.

In a method according to the invention for operating a radar apparatus of a vehicle, the radar apparatus initially transmits radar beams simultaneously via a plurality of transmission antenna channels (TX) in a first MIMO mode. The radar apparatus also receives radar beams simultaneously via a plurality of receiving antenna channels (RX) in each case, said radar beams having been reflected by the surroundings of the vehicle. According to the invention, when a multi-reflection scenario is detected or expected, a change is made to a second MIMO mode in which the number of simultaneously transmitting transmission antenna channels is reduced. After the multi-reflection scenario has ended, the radar apparatus is again operated in the first MIMO mode.

The present invention relates to a component (1) for a vehicle (2) comprising a visible element (3) with a decorative area (4). It is important that the decorative area (4) is designed to be at least partially transparent to radar beams and light rays. The component (1) further comprises a support element (7) designed to be at least partially transparent to radar beams and light rays, including a heating element (8) designed to be at least partially transparent to radar beams and light rays for heating the decorative area (4), a light guide device (9) designed to be at least partially transparent to radar beams and light rays for illuminating the decorative area (4), and a radar camera (11) for traffic monitoring, configured to emit a radar beam. The present invention also relates to a radiator grille (23) for a vehicle (2) comprising at least one such component (1).

A radar-enabled wireless communication device (12) is configured to communicate with a wireless communication network (10) and performs radar transmissions using a same or overlapping millimeter wave (mmW) frequency range, determine whether there are any neighboring wireless communication devices (32) that are vulnerable to interference from the radar transmissions and, if so, adapt radar transmissions in the affected radar beam directions or transmit assistance information enabling the vulnerable devices (32) to mitigate or avoid the interference. In a particular example, the wireless communication device (12) performs radar transmissions during a Downlink (DL) phase of the wireless communication network (10), such that the vulnerability determinations are with respect to DL interference at the neighboring wireless communication devices (32). Vulnerability determinations may be performed with or without support of the wireless communication network (10) and may be updated responsive to detecting changed conditions.

The application provides a middle-high orbit SAR fast time domain imaging method based on a self-defined scene coordinate system, and relates to the technical field of radar imaging. The method comprises the following steps: firstly, according to the complex imaging geometric characteristics of the middle-high orbit SAR in the large squint mode, the analytical expression of the wave number support area in the squint mode is calculated. Secondly, aiming at the characteristics of the middle-high orbit SAR imaging, such as the super wide swath and the super long synthetic aperture time, the application provides a fast time domain imaging algorithm, which can effectively process the imaging data and meet the imaging mode of the middle-high orbit SAR. Finally, according to the arrangement mode of the imaging grid, combined with the characteristics that the radar beam footprint is not fixed and the ground sidelobe direction is not consistent, the imaging algorithm can meet the complex imaging geometric conditions of the middle-high orbit SAR in different orbit segments, downward angles and squint angles, and can self-define a two-dimensional direction flexible and non-orthogonal scene coordinate system, so as to meet the imaging processing requirements of the middle-high orbit SAR in different imaging modes.

The application discloses a frequency scanning radar beam pattern measurement system, which comprises a high-precision holder, a frequency scanning radar arranged on the high-precision holder, a variable frequency transmitting source arranged on a support with the same height as the frequency scanning radar, a first synchronization device connected with the frequency scanning radar and used for starting the frequency scanning radar and simultaneously sending a synchronization signal to a second synchronization device, and the second synchronization device connected with the variable frequency transmitting source and used for adjusting the transmitting frequency of the variable frequency transmitting source and controlling the variable frequency transmitting source to transmit a variable frequency signal in response to the synchronization signal, so that the frequency scanning radar generates beam pattern data of the corresponding frequency after receiving the variable frequency signal. The beam pattern data generated by processing the variable frequency signals corresponding to different frequencies transmitted by the variable frequency transmitting source through the frequency scanning radar can quickly and efficiently measure multiple beam patterns of the frequency scanning radar, and the measurement efficiency of the multiple beam patterns is improved.

The embodiment of the application provides a kind of distributed high-precision phased array measurement radar beam scheduling method and beam scheduling system, belong to radar beam scheduling technical field.The scheduling method includes: obtaining the antenna azimuth angle pitch information of each substation and radar site information, to obtain the conversion matrix of geocentric coordinate, station heart coordinate conversion matrix and array surface coordinate conversion matrix;Obtain the scheduling request of main station TRK;The main station target RAE coordinate of the scheduling request is converted into array surface coordinate according to the array surface coordinate conversion matrix;The main station target RAE coordinate is converted into geocentric coordinate according to the geocentric coordinate conversion matrix;The geocentric coordinate is sent to each substation for observation;Obtain each the feedback observation information of the substation, and integrate each the observation information according to time sequence signal, to obtain the observation data of target.The application solves the problem of each radar receiving time sequence synchronization and target position unification under multiple stations, ensures the consistency of data between different radar stations.

The present application relates to the technical field of radar resource allocation scheduling, in particular to an airborne radar guided search decision method and system based on proximal policy optimization. A decision model including an upper policy module and a lower policy module is constructed, the upper policy module including a policy network and a value network; the decision model is used to collect radar search decision trajectories, the policy network and the value network of the upper policy module are trained using the radar trajectories, and the policy network parameters and the value network parameters are updated; the current observation state is input into the trained decision model, the azimuth coordinate of the space to be searched is obtained based on the upper policy module, the radar beam residence time and the wave position search data rate are obtained based on the lower policy module, and the decision of the radar guided search task in the cluster target space over-the-horizon distribution scene is realized. The method is more accurate in decision-making.

The application discloses a radar beam compensation method and device based on motion feedforward and a detection tracking system. The method introduces a real-time beam phase compensation mechanism based on the feedforward of turntable motion information, takes the azimuth rotation of the turntable as a known and measurable input disturbance, actively and feedforwardly compensates the radar beam in reverse, and thus ensures the stable pointing of the radar beam to the target in the inertial space in the whole process of the motion of the turntable, and finally ensures that the target track information is not lost when the radar guides the optical camera to search for the target.

The invention discloses a multi-scanning laser radar collaborative calibration method and system based on a three-dimensional space grid, relates to the field of laser radars, and is used for improving the high-precision collaborative consistency of spatial orientation of multiple radars. According to the method, a multi-radar relative coordinate system is constructed and initialized; constructing a three-dimensional calibration space in each radar detection intersection area, and dividing a space node set; planning a space moving path of the captive balloon in the space node set, and synchronizing system time; executing space node traversal and observation data acquisition according to the planned space moving path; based on the constructed multi-radar relative coordinate system and the collected observation data, constructing a global nonlinear error model and performing joint optimization; and performing system parameter compensation and correction according to the optimized calibration parameters. The method effectively solves the problems that a traditional plane calibration method cannot decouple radar installation inclination errors and pointing zero deviation, and the consistency of multi-radar beam long-distance space rendezvous is poor.

This invention relates to the field of radar-communication integration, specifically to a radar-communication integrated system with a metamaterial antenna architecture and a waveform optimization method. It utilizes a dynamic metamaterial antenna pre-encoder to fit an optimal pre-encoder for the dynamic metamaterial antenna, ultimately obtaining the optimal pre-encoder. This system optimizes radar transmission beamforming performance while satisfying communication user quality and constant power mode constraints. This invention considers dynamic metamaterial antennas, which saves costs and occupies a small area. The radar beam performance is similar to that of a phase-shifter-based hybrid antenna structure. Under reasonable communication quality constraints, the radar beam of the radar-communication integrated system with the dynamic metasurface antenna architecture approaches the performance of a radar beam without spectrum sharing.

The invention relates to the field of radar scattering signal interference analysis, and particularly discloses a maritime high building communication interference analysis method based on radar detection, which comprises the following steps: constructing an electromagnetic simulation environment model comprising a building, a radar and a communication system; configuring a plurality of simulation scenes with different radar angles and powers; simulating radar beam irradiation, tracking a scattering path, and identifying and extracting scattering fingerprints of a plurality of scattering centers; clustering the scattering centers based on a spatial proximity and electromagnetic consistency principle to form an equivalent scattering source and generate a distribution diagram of the equivalent scattering source; calculating the interference power of each equivalent scattering source at the communication node, and judging whether a scattering interference risk exists or not by combining the communication signal strength; and outputting the risk scene information. According to the method, refined modeling and efficient processing of the complex scattering effect of the building are achieved, interference source distribution can be revealed, the interference risk can be quantitatively evaluated, and technical support is provided for offshore electromagnetic compatibility design and interference investigation.

1. Name of the designed product: RCS size adjusting device (1) based on Dragon's Eye lens. 2. Use of the designed product: controlling the position of the reflecting surface to make the Dragon's Eye lens reflect radar beams. 3. Design points of the designed product: in shape. 4. Picture or photo best showing the design points: perspective view 1.