209 results about "Planar array" patented technology

The invention discloses a super-large plane array type space computing power center, and belongs to the field of space technologies and space infrastructures. The space computing power center is deployed in a morning and evening orbit and comprises a plurality of computing power satellites which are physically docked in orbit through a docking mechanism. Each computing power satellite comprises a satellite platform, and a computing power load, a condensation type energy system and a space pump drive fluid loop system which are arranged on the satellite platform, and a docking mechanism for inter-satellite in-orbit physical docking is also assembled on the satellite platform. A plurality of computing power satellites form a planar array type rigid whole body through the docking mechanism, and energy scheduling among the light condensation type energy systems is realized based on the docking mechanism. According to the space computing power center, through multi-satellite physical docking and energy collaborative scheduling, the energy utilization efficiency and the power supply reliability of the system are improved.

Omni-directional, horizontally polarized antennas are provided. According to one aspect, an omni-directional, horizontally polarized antenna includes a first reflector and a second reflector separated from the first reflector. Disposed between the first and second reflectors are a planar array of radially directed horizontally polarized antenna elements and a planar feed network configured to feed the antenna elements of the planar array. A coaxial feed structure configured to communicate electrical signals to or from the feed network is provided.

In many embodiments of the invention, a space-based data center includes orbital server modules configured to be deployed in space, each module including a communication subsystem for module-to-module communications to form a data center, tiles arranged in a planar array, where each tile has a layered structure including solar cells forming a layer across a first surface, thermal radiator panels forming a layer across a second surface, electronic components distributed laterally in a layer between the layer of solar cells and the layer of thermal radiator panels, where each electronic component receives power locally from solar cells and rejects heat to the thermal radiator panel beneath it, where a first subset of tiles are compute tiles in which the electronic components include one or more computing processors and memory, and where a second subset of tiles are support tiles in which the electronics components include network switches and energy storage.

The invention relates to a two-dimensional slicing method and device for a three-dimensional model, and the method comprises the steps: carrying out the coordinate system conversion and bounding box calculation of the three-dimensional model constructed by a triangle, and obtaining a target bounding box; according to the size of the target bounding box, the direction with the small cutting number is determined as the cutting direction, and orthogonal cutting is conducted on the target bounding box; performing intersection judgment on all triangular patches in the three-dimensional model according to the target bounding box and the cutting direction; cutting and comparing triangles in the intersecting triangle set with planes in the cutting plane array to obtain a plurality of sequence points, and connecting all the sequence points to obtain a two-dimensional slicing result; the optimal cutting direction is determined through coordinate system conversion and bounding box calculation, orthogonal cutting and triangular patch intersection judgment are combined, the slicing efficiency of the large-scale three-dimensional model is remarkably improved, manual intervention is reduced, the real-time processing requirement is met, and the method has the advantages that the optimal cutting direction is automatically determined, and the processing efficiency of the large-scale model is improved.

Methods, systems, and devices for wireless communications are described. In some systems, a device may select antenna elements from a planar array to transmit or receive an orbital angular momentum (OAM) beam. The device may determine a first area (e.g., a first ring area) based on an angular direction over which the device can communicate an OAM beam with a second device and may determine a second area (e.g., a second ring area) on the planar array based on projecting the first area on the planar array. The device may select a set of antenna elements from the planar array that are located within the second area. The device may determine a complex-valued weight for each antenna element of the selected set of antenna elements and may transmit or receive an OAM beam to or from the second device via the set of antenna elements according to the angular direction.

The invention discloses a radioactive waste liquid surface pollution multipoint array detection system and method, and relates to the technical field of nuclear radiation detection. The radioactive waste liquid surface pollution multipoint array detection system comprises a main body fixing frame, a mobile control device, a detector and an upper computer, a plurality of mounting holes arranged in a planar array are formed in the main body fixing frame; the movement control device controls the main body fixing frame to move; the plurality of detectors are mounted in the mounting holes of the main body fixing frame; the upper computer is used for regulating and controlling parameters of the CMOS sensor and storing, displaying, analyzing and processing frame images. The radioactive waste liquid storage tank liquid level pollution monitoring method is applied to a radioactive waste liquid surface pollution multipoint array detection system and is used for monitoring alpha and beta pollution areas of a radioactive waste liquid storage tank liquid level. The whole liquid level area of the radioactive waste liquid storage tank is covered at a time through the detachable detector group arranged in the plane array, and a pollution distribution panorama can be obtained through single-time measurement.

The invention discloses a maneuvering target long-time coherent accumulation method, system and device and a medium, and relates to the technical field of radar signal processing, and the method comprises the steps: enabling a plane array to achieve the complete airspace coverage in the azimuth angle range dimension through the introduction of FDA; according to the planar array, three-dimensional information of a target is utilized, so that the target can obtain information with higher dimensionality than that of coherent FDA. Then, an azimuth angle-pitch angle-distance three-dimensional matching filter is designed, and rapid waveform matching is realized. The method aims at the influence of a maneuvering target phase-coherent accumulation process. And finally, compensating range migration and Doppler frequency migration in a high-altitude maneuvering target detection process by adopting a second-order Keysone transform-LVD algorithm to realize coherent accumulation of the target. The invention not only provides a novel radar array combining PA and FDA, but also is applied to the field of target detection, especially for complex detection conditions such as high-altitude maneuvering targets.

The invention discloses an RIS-assisted hybrid beam forming millimeter wave communication system and method, and the system comprises a base station which is provided with Nt uniform planar array antennas; the base station adopts a hybrid beam forming structure, and Nt transmitting antennas share NRF radio frequency links; the RIS is provided with M uniform planar array reflection elements and can adjust a reflection coefficient according to real-time channel state information; the user terminal communicates with the base station through the RIS; according to the method, beam forming and RIS reflection coefficient configuration are mixed by adopting a joint optimization method based on a codebook, so that the calculation burden in the channel estimation and beam forming processes is reduced. According to the invention, the RIS is introduced into the hybrid beam forming millimeter wave communication system, so that the problem of communication interruption caused by shielding is relieved. The invention further provides a joint optimization method based on the codebook, and the joint optimization method is used for hybrid beam forming and RIS reflection coefficient configuration so as to reduce the calculation burden in the channel estimation and beam forming process.

The invention relates to the technical field of satellite communication, in particular to a high-gain phased array receiving antenna system for low-orbit satellite communication, which comprises a radiation feed integration module, a beam phase mapping module, a digital beam forming module, a signal amplification module, a protection packaging module and a performance verification module. Stacking strip line feed networks and performing electromagnetic coupling to obtain an initial radiation channel; receiving and analyzing a beam control instruction through an embedded circuit, extracting a target beam pointing angle and mapping the target beam pointing angle into a phase offset; generating a digital phase control word according to the phase offset, and applying the digital phase control word to the radio frequency signal to complete phase calibration; a transistor with a low-noise amplification structure is used for enhancing the calibrated signal energy; the wave-transparent front cover covers the radiator, and the electromagnetic shielding rear cover wraps the internal components to form an assembly in a sealing manner; and verifying the gain and beam switching rate of the assembly in the typical frequency band of the low-orbit satellite. According to the invention, the low-orbit satellite communication signal receiving efficiency can be improved.

In many embodiments of the invention, a space-based data center includes orbital server modules configured to be deployed in space, each module including a communication subsystem for module-to-module communications to form a data center, tiles arranged in a planar array, where each tile has a layered structure including solar cells forming a layer across a first surface, thermal radiator panels forming a layer across a second surface, electronic components distributed laterally in a layer between the layer of solar cells and the layer of thermal radiator panels, where each electronic component receives power locally from solar cells and rejects heat to the thermal radiator panel beneath it, where a first subset of tiles are compute tiles in which the electronic components include one or more computing processors and memory, and where a second subset of tiles are support tiles in which the electronics components include network switches and energy storage.

The utility model relates to a high-frequency transmitting transducer capable of measuring internal temperature in real time. The high-frequency transmitting transducer comprises a ceramic shell platinum resistor and a longitudinal oscillator, the ceramic shell platinum resistor is arranged at the central position of the high-frequency transmitting transducer planar array, the whole longitudinal vibrator is trumpet-shaped, and the center of a gap space between trumpets is also the central position of the high-frequency transmitting transducer; the number of the ceramic shell platinum resistors is one, specifically, the ceramic shell platinum resistors are arranged behind the front cover plate at one end of the longitudinal vibrator in the center position and in the gap between the piezoelectric ceramics, epoxy resin or 2401 instant adhesive is used for fixing every two ceramic shell platinum resistors, and the other end of the piezoelectric ceramics is further provided with a rear cover plate. According to the high-frequency transmitting transducer, the ceramic shell platinum resistor is placed in the gap between the longitudinal vibrators without changing the original structure of the transducer, and the internal temperature of the transducer is tested in real time by leading the internal core wire of the watertight cable of the transducer to the dry end.

The application provides a uniform plane array FDA-MIMO three-dimensional target positioning method and system based on complete decoupling atomic norm minimization. The method converts the problem into a semi-positive programming solution by constructing a low-dimensional observation matrix and using complete decoupling atomic norm, and realizes joint estimation of distance, pitch angle and azimuth angle through Vandermonde decomposition. Compared with high complexity algorithms (VANM, etc.), the application significantly reduces the calculation amount by decomposing the Toeplitz matrix, and improves the single snapshot precision by using the multi-slice constraint mechanism. Compared with low complexity algorithms (3D-DANM), the application introduces an auxiliary variable matrix to restore the distance-angle coupling structure, avoids the performance loss caused by excessive relaxation, and significantly improves the estimation accuracy and multi-target resolution capability while ensuring the calculation efficiency.

A rapid-deployment satellite communications (satcom) terminal apparatus includes a base capable of rotation relative to a platform (e.g., a mobile platform or trailer to which the apparatus may be mounted or from which it may be detached), and a passive planar array panel comprising an array of antenna elements or apertures, the passive planar array panel pivotably and slidably attached to the base. The passive planar array panel includes a feed arm and feed antenna, the arm articulable relative to the panel and the antenna articulable relative to the arm. The feed antenna transmits and / or receives EM energy focused by the antenna elements in a beam direction adjustable by an array controller to a desired azimuth and elevation via electromechanical adjustment of, respectively, the rotational orientation of the base and the slant angle of the passive planar array panel relative to the platform.

The present invention discloses a multi-channel coherent accumulation method of an FDA-MIMO radar based on range-frequency offset compensation, which belongs to the technical field of radar moving target detection. The present invention comprises: obtaining the echo signal of the target by using a two-dimensional planar array FDA-MIMO radar; performing multi-channel matched filtering on the echo signal, and performing FFT transformation in slow time to realize pulse accumulation; then performing covariance matrix calculation to obtain the noise subspace and signal subspace; then performing azimuth and elevation angle search of the target, and obtaining the range-frequency offset coupling compensation vector based on eigendecomposition; multi-channel beamforming, coherently synthesizing the multi-channel signal energy and using a constant false alarm rate to detect the target. The present invention can significantly improve the output signal-to-noise ratio and reduce the computational complexity of coherent accumulation. Moreover, when there is an error in the target distance estimation or the Doppler effect is generated by the frequency offset, the present invention can obtain a higher coherent accumulation gain than the MUSIC algorithm.

The application provides a FDA-MIMO radar gridless target parameter estimation method based on a single base plane array, relates to the technical field of array signal processing, constructs a single base plane array FDA-MIMO radar system, and the transmitting end and the receiving end of the radar system are composed of a uniform plane array; a receiving signal model is established based on the radar system, the model is vectorized, a selection matrix is introduced to construct an angle-distance decoupling receiving signal model; the covariance matrix of the receiving signal model is calculated; a low-rank matrix reconstruction optimization problem suitable for the model is established according to the covariance matching criterion; the optimization problem is solved by the idea of alternating projection by using the properties of the covariance matrix; the information of the angle theta and the distance r is estimated by the multiple signal classification method according to the covariance matrix; the problems that the FDA-MIMO radar angle-distance decoupling model in the prior art is only suitable for a linear array, and the target parameter estimation method has low estimation accuracy and high calculation complexity can be solved.

This invention discloses a mercury cadmium telluride infrared detector and its fabrication method. The method innovatively employs negative photoresist and a lift-off process to grow a metal mask and define contact hole patterns. This metal mask layer serves as both an ion implantation mask and a contact hole etching mask, solving the problems of implantation region positioning deviation and size mismatch in traditional processes. It enables ultra-small cell spacing, improves the detector's photoelectric performance and array uniformity, and is suitable for the large-scale fabrication of high-density infrared detector planar arrays.

The sensing system includes a focal plane array, a detector dual input circuit, a detector selector circuit, and a selection module. The focal plane array includes a plurality of detectors. The detector dual input circuit combines outputs from the detectors received on a first input channel without using outputs received on a second input channel. The detector selector circuit establishes a first signal path between the detectors and the first input channel and a second signal path between the detectors and the second input channel. The detector selector circuit includes a mask that maps the detectors to a first detector group or a second detector group. Based on the mask assignment, the selection module connects one or more of the detectors to the first signal path to establish the first detector group and connects one or more of the detectors to the second signal path to establish the second detector group.

The invention relates to the technical field of shock absorption supporting of aircrafts, and discloses a low-frequency shock absorption supporting structure and an aircraft, and the supporting structure is a metamaterial which is formed by arranging a plurality of cell element structures with the same structure in a planar array mode to form one or more layers of coupled and stacked metamaterials; the cell structure is a cylindrical structure enclosed by four wall plates, and a cavity is formed in the cell structure; each wall plate comprises a first plate section and second plate sections located on the upper side and the lower side of the first plate section. The first plate section is rectangular, and the second plate section is isosceles trapezoid; the first plate section is provided with two first edges which are opposite up and down; the second plate section is provided with a second edge parallel to the first edge, and the second edge is shorter than the first edge; the first plate sections of the adjacent cell structures are attached to each other, and the openings of the upper and lower cell structures are aligned during stacking. Through relative compression deformation motion between the top substrate and the cell element structure, vibration energy is absorbed, and the influence of vibration on precise instruments in the aircraft is reduced.

The application discloses a two-dimensional sparse array single-shot DOA estimation method based on a deep unfolding convolutional network, and belongs to the technical field of cross array signal processing and deep learning. First, a two-dimensional uniform planar array is constructed, and sparse observation data are constructed. Then, an isomorphic tensor mapping mode of separating real parts and imaginary parts is adopted to decompose the sparse observation signals and splice them along the channel dimension, so that a three-dimensional input tensor containing real part channels and imaginary part channels is constructed to maintain the two-dimensional spatial topological structure of the array. Then, the overall structure of the deep unfolding network is unfolded, and a sliding window rule with a predetermined size is used to rearrange the two-dimensional array data into a block Hankel matrix. Finally, network training is performed to realize DOA estimation. The application maintains the two-dimensional spatial structure, improves the reconstruction accuracy, reduces the computational complexity, improves the robustness under a low signal-to-noise ratio condition, realizes high-precision DOA estimation under a single-shot condition, and has good engineering application value.

A three-dimensional millimeter wave time-varying channel estimation method and device belong to the field of wireless communication, comprising: establishing a millimeter wave communication system containing array motion; establishing a three-dimensional time-varying channel model considering Doppler effect, analyzing the synthesized signal in the three-dimensional time-varying channel caused by array motion, each column of the synthesized direction matrix being consistent with the array manifold of the planar array, indicating that the linear array in motion can form a virtual planar array; realizing sparse representation of the three-dimensional time-varying channel through linear array motion; recovering the three-dimensional time-varying channel based on the iterative meshless weighted algorithm of array motion; comprising AoAs estimation and path gain estimation. The application overcomes the negative influence of Doppler frequency shift in the time-varying channel on channel estimation, constructs virtual array elements, realizes channel estimation on the three-dimensional millimeter wave time-varying channel through linear array motion, improves channel estimation accuracy, and greatly reduces pilot overhead and algorithm complexity.

The invention discloses a histogram data processing method and related equipment thereof, and relates to the field of laser radars, and the method comprises the steps: obtaining a current histogram which is obtained after an area array laser radar module with a plurality of pixel points detects a target object; converting the current histogram to a target domain, wherein the target domain comprises a frequency domain; part of target spectrum values of the current histogram in the target domain are reserved, a compression result is obtained, and the part of target spectrum values reflect corresponding peaks and peak height information of the current histogram. According to the invention, consumption of excessive coding resources and storage space can be avoided.

A chip 10 comprising a microfluidic space 12 accommodating a plurality of micro-entities in a substantially planar array and a dispense region 16 configured to provide a flow of carrier fluid non-parallel to an exit orifice 14, wherein the microfluidic space has the height of a single layer of micro-entities and contains a carrier fluid in which the micro-entities are manipulated using a force. The exit orifice 14 may be double or five times the height of the microfluidic space and may comprise a single gap, a series of gaps, a sieve or a semi-permeable membrane. The carrier fluid may be provided at less than 70, or 60-70 degrees to the orifice. The chip may comprise carrier fluid inlets 26, optionally symmetrically positioned either side of an outlet 24. A cavity in the dispense region may have a depth of 100-200 µm. The micro-entities may be a cell, part of a cell, a bead, an organelle, an organism, a liposome, a biosynthetic structure or a vesicle, and may be localised in a sequestration pen. One or more micro-entities may be encapsulated in at least a subset of the microdroplets 18. The force may be electrowetting, EWOD or oEWOD.

The present application relates to a kind of improved precision angle measurement method of face array camera interior orientation element calibration method, steps are as follows: according to the arrangement of precision angle measurement method, record the angle of each measuring line and camera image coordinate axis, the coordinates of each measuring point and corresponding two-dimensional turntable angle of measurement equipment;Measuring point coordinates normalization calculation, constructs distortion model;All interior orientation parameters and measurement data are uniformly constructed distortion correction residual model;With distortion residual minimum as objective function, solve interior orientation element using nonlinear optimization algorithm.The present application method is applied to face array camera, without limiting the angle of parallel light rotation respectively and the accurate parallelism of camera image coordinate axis in experimental measurement, reduce the cost and difficulty of calibration, and construct the interior orientation element unified solution framework covering camera principal point, camera principal distance, distortion parameter, improve the precision of interior orientation element.

The invention discloses a beetle elytra-imitated interlocking structure, a metamaterial plate comprising the beetle elytra-imitated interlocking structure and a composite armor system, and belongs to the field of multifunctional advanced protective materials. The interlocking structure comprises a plurality of functional elements arranged in a planar array, the adjacent functional elements are mechanically connected through geometric interlocking interfaces, the contact surfaces of the geometric interlocking interfaces are in a non-chemical bonding state and can generate relative dislocation under an impact load, and the geometric interlocking interfaces are in a non-chemical bonding state. Each functional element is integrally prepared from a polymer-based composite material dispersed with an electromagnetic loss filler, the interior of each functional element is of a three-dimensional porous micro-lattice structure with a negative Poisson's ratio effect, and the porosity and / or cell size of each three-dimensional porous micro-lattice structure are / is changed in a gradient manner in the thickness direction of the corresponding functional element. The metamaterial plate and the composite armor system using the interlocking structure can effectively inhibit structural layering under an impact load, can actively improve anti-penetration capability, and also have an excellent broadband electromagnetic wave absorption function.

A focal plane array system includes a plurality of pixels configured to output a first signal light beam and to receive a second signal light beam reflected from a target object. Each of the plurality of pixels includes a transmitter, a receiver, and an interference light beam controller that includes a splitter disposed on an emission path of the first signal light beam to split a portion of the first signal light beam into an interference light beam, a receiving coupler disposed on a receiving path of the second signal light beam reflected from the target object, and a waveguide configured to transport the interference light beam split from the splitter to the receiving coupler. The receiving coupler is configured to transport the second signal light beam reflected from the target object to the receiver and to combine the interference light beam with the second signal light beam.

The invention belongs to the technical field of wireless communication and perception integration and physical layer secure transmission, and relates to an MPC-enabled RIS unmanned aerial vehicle communication system and a secure communication resource allocation method, and the system comprises a base station, an RIS unmanned aerial vehicle platform, a legal communication user and an eavesdropper. The base station is a dual-function base station provided with a uniform linear array antenna, and the RIS unmanned aerial vehicle platform is provided with a reflection unit plane array; direct line-of-sight links do not exist between the base station and the communication user and between the eavesdroppers, the base station points a wave beam to the RIS unmanned aerial vehicle platform, and the wave beam points to the communication user and the eavesdroppers after being subjected to phase modulation by the RIS unmanned aerial vehicle platform; the beam pointing to the eavesdropper is reflected and returned to the base station through phase modulation of the RIS unmanned aerial vehicle platform for sensing the position of the eavesdropper; according to the method, the three-dimensional track is dynamically adjusted through the RIS carried by the unmanned aerial vehicle, when the base station-user direct connection link is blocked, the communication link is reconstructed in real time, the network coverage range is expanded, the channel gain is improved, and the communication reliability of legal users in a complex environment is guaranteed.

The present invention belongs to the technical field of electroacoustics in electronics, and relates to an audio system formed by a speaker-enclosure planar array, and a preparation method for the audio system. Different from the prior art, the present invention uses a plurality of small / -micro-aperture speakers to form a special planar array audio device, such that by using the plurality of small- / micro-aperture speakers, audio signals with frequencies of 20-120 Hz or even higher, which are typically cut off in small-aperture speaker systems, are caused, by means of synchronous superposition operation, to output powerful, clear and pure bass sound waves. Moreover, an algorithm for a linear digital filter is used to perform frequency division and surround sound processing on digital audio signals of the speakers without generating a phase shift. Therefore, a series of functional defects in conventional large-aperture subwoofers are overcome, thereby enabling the planar-array audio system to achieve a surround sound effect in a three-dimensional or two-dimensional space.

The invention discloses a three-dimensional force tactile representation method and system based on planar Halbach array magnetic moment vector regulation and control. A planar array electromagnet is excited to generate a three-dimensional controllable electromagnetic field, excitation current of the planar array electromagnet is adjusted, and electromagnetic acting force borne by a fingertip magnet module is regulated and controlled; using a finite element simulation method to calculate and obtain electromagnetic force simulation discrete data when the fingertip magnet module is located at discrete grid points of the real operation space; analyzing data to design a control strategy, namely determining excitation current of each coil of the planar Halbach array electromagnet according to the relative position and expected stress of a fingertip magnet module in an operation space so as to realize force feedback in a three-dimensional space; according to the three-dimensional force tactile representation method, a planar Halbach array magnetic moment vector regulation and control method is innovatively proposed to regulate the electromagnetic field of each position in a real operation space, and three-dimensional force tactile feedback capable of precisely regulating and controlling the magnitude and direction of feedback force in a large range is realized in combination with a fingertip magnet module.

The application provides a test analysis method for determining the distribution of automobile wind noise contribution, which comprises the following steps: arranging wind noise source sampling points around the outer surface of the whole vehicle body, arranging in-vehicle noise receiving points at the in-vehicle noise receiving positions of interest, designing and selecting at least two point arrangement schemes, selecting the point arrangement scheme with the optimal accurate test analysis result, making an isolation and absorption distribution cloud map according to the test data, performing a wind tunnel test through a planar microphone array wind noise source positioning, obtaining a planar array positioning result, calculating the wind noise contribution distribution and making a cloud map, and thus evaluating the distribution of the contribution of automobile wind noise to the in-vehicle receiving points along the vehicle body, so that a more real and accurate contribution distribution can be obtained, and a more accurate basis for the low wind noise design scheme of the automobile can be provided.