375 results about "Planar array" patented technology

The invention discloses a dam leakage detection method based on combination of a circuit and an electromagnetic field. The method comprises the following steps: step 1, placing an emission electrode at a certain depth in a water area on one side of an upstream face of a dam; 2, a loop electrode is placed at the position 3 meters away from one side of the downstream face of the dam; step 3, connecting the emission electrode and the loop electrode by using a power supply to form a planar array; 4, detecting a voltage signal of the electromagnetic wave by the collecting electrode; step 5, placing a horizontally polarized loop antenna on one side for transmitting, and symmetrically placing a vertically polarized loop antenna and a line antenna on the other side for receiving; and 6, detecting the vertical position of the leakage path by using a common depth method. According to the detection method disclosed by the invention, the detection efficiency and precision can be improved, weak leakage can be accurately positioned, the operation is simple, operation by using a ship in water is not needed, and a dam structure does not need to be damaged by drilling.

The invention relates to a packaging defect detection method and system, and the method comprises the steps: S1, obtaining the size information of packaging bags and the interval information of adjacent packaging bags through an area-array camera and a photoelectric sensor in combination with a multi-scale template matching method; s2, delay time of a conveying belt is calculated, and it is ensured that the distance between adjacent packaging bags is larger than a set value; s3, triggering a line scanning camera to shoot an image of the packaging bag, and collecting the vibration frequency; s31, performing motion compensation correction on the image by adopting an improved optical flow method; s32, inputting the corrected image into a forward propagation network based on an improved OfficientViT model, wherein the model comprises a multi-scale linear attention module and an SPP-ELan module; s33, the images are classified, if the classification result is that the bags are not packaged, the unpackaged bags are grabbed through a grabbing robot, and if it is determined that the bags are not packaged based on a classification confidence coefficient threshold value, the unpackaged bags are removed; and S34, inputting the defect image into an improved ACGAN network for data enhancement, wherein the network comprises a CMFNet denoising module based on a U-Net architecture. The method and the system can monitor and identify the packaging defects on the production line in real time, improve the accuracy and the efficiency of inspection, and reduce the labor cost.

The invention relates to a broadband planar array antenna light-operated beam forming method based on multi-task sparse learning, and the method comprises the steps: deducing an array factor expression of a broadband array as priori knowledge through employing a rectangular planar array antenna; constructing a multi-frequency-point beam joint optimization model of the planar array antenna based on the neural network; based on the priori knowledge, calculating a total loss function of the model by using expected broadband array pattern data and a group inhaul cable regularization method, and training a multi-frequency-spot beam joint optimization model; and based on the trained model, obtaining the optimal array layout and the amplitude and delay distribution of each array element, and calculating to obtain a low-sidelobe directional diagram in which the deflection angle is irrelevant to the frequency. According to the invention, the deflection angle of the array radiation beam is kept constant in a broadband range, and the problem of'beam squint 'of a traditional phased array is solved; and meanwhile, the beam sidelobe level of each frequency point is effectively suppressed, and the grating lobe problem of the uniform array on the broadband is avoided.

A light emitting device includes a planar array of individually addressable first light sources configured to emit visible light into a plurality of angular bins toward an environment, one or more second light sources configured to emit ultraviolet light, an imager positioned to receive light reflected from the environment, a processor configured to analyze one or more images captured from the imager and identify a shadow region in the environment, wherein one or more light sources of the plurality of individually addressable first light sources is directed to increase a light flux output in one or more angular bins of the plurality of angular bins corresponding to the shadow region. The one or more second light sources and may be individually addressable and positioned in a planar array on a substrate.

The invention belongs to the technical field of array antenna synthesis, and particularly relates to a thin cloth rectangular planar array antenna synthesis method, a program, equipment and a storage medium. According to the method, a thin cloth rectangular planar array antenna comprehensive method is converted into an optimization problem of an array element position in a quadrant, an improved sparrow algorithm is adopted, Kent mapping population initialization is introduced, and diversity of an initialized population is enhanced; the idea of a sine and cosine algorithm is fused in a position updating strategy of a discoverer, and a nonlinear sine learning factor is introduced to enhance all search capabilities; and finally, a crisscross strategy is introduced into a sparrow algorithm, and the optimization precision is improved by improving a search mode of a supervisor.

The present invention relates to multi-stake underwater transducers and arrays for the generation and reception of sound waves in water. The invention provides the design and fabrication of compact piston-type underwater transducers of low-to-mid operating frequency made of piezoelectric single crystals without the need of any pre-stress mechanism. The invention uses a multi-stake pipe-like motor section made of piezoelectric single crystals of high transverse mode piezoelectric coefficients and low acoustic impedance, and small-diameter and light head mass(es). The present invention also discloses various means of increasing the bandwidth of the multi-stake underwater transducers as well as derivative transducers and arrays made of them, including compact 2D and 3D omni-directional transducers, planar, conforming and shaped arrays of various designs, high-density arrays and low-drop-down-ratio parametric arrays of either single or dual frequency bands.

The resolution-customizable micro spectrometer based on the transverse dispersion metasurface comprises a dispersion metasurface array structure and a focal plane pixel array, and the dispersion metasurface array structure comprises a plurality of dispersion metasurface sub-arrays which are distributed in an array mode and used for preliminary spectrum decoupling and directional convergence. The dispersion metasurface subarray comprises a plurality of dispersion metasurface units and all-dielectric substrates thereof, the dispersion metasurface units are nano-columns with four-fold symmetry, the nano-columns are periodically arranged, and the phase of transmission light is dynamically regulated and controlled according to the frequency omega of incident light. The focal position (x ', y') of the transmission light on the focal plane is in a linear mapping relation along with the change of the omega; the focal plane pixel array comprises a multi-element plane array composed of a plurality of pixels, and the multi-element plane array is in pixel-level registration with the dispersion metasurface sub-array. According to the invention, pixel-level precise condensation is realized, crosstalk is effectively inhibited, the detection precision is improved, and real snapshot spectral imaging is realized.

The invention provides a video-level polarization spectrum imaging system and method. The system comprises an imaging unit, a polarization spectrum coupling unit, a data processing unit and an output unit, the imaging unit is used for imaging a target object on an imaging plane; the polarization spectrum coupling unit comprises a multi-channel spectrum modulation diaphragm and a micro-polarization focal plane array; the multi-channel spectrum modulation diaphragm is used for dividing incident light into a plurality of different spectrum channels; the micro-polarization focal plane array is used for converting the spectrum modulation light into polarized light of a plurality of different angles; the data processing unit is used for fusing the spectral information, the polarization information and the pixel information into multi-dimensional polarization spectral data; and the output unit is used for transmitting the polarization spectrum data to a computer. The system obtains spectrum information through a spectrum modulation diaphragm so as to distinguish the material composition and the chemical property of a target object; according to the system, polarization imaging is carried out through the micro-polarization focal plane array, and the detectability and the recognition rate of a target object can be improved.

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.

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 invention discloses an array amplitude-phase error calibration method based on joint sparse estimation. The method comprises the following steps: setting a correction sound source to be positioned in an unknown far-field direction relative to a sensor linear array; the method comprises the following steps: dividing an observation area of a sensor linear array to obtain a plurality of grid points, correcting an array sampling signal based on the grid points and offset, constructing an array response signal model, and performing joint sparse direction-of-arrival estimation of the grid points and the offset to obtain a corrected sound source signal direction-of-arrival; the joint sparse estimation method for solving and correcting the direction of arrival of the sound source signal is popularized to a planar array and a multi-frequency cross array through iterative correction; and on the basis of the estimated corrected sound source direction of arrival, array amplitude-phase error calibration is completed by adopting a spatial filtering method. According to the method, the problem of beam pattern attenuation caused by existing array amplitude phase error calibration is solved, the error correction precision and correction efficiency are improved, and the application range of the error calibration method in multiple array types is widened.

Systems and methods are described for optical processing. According to some aspects an optical processing apparatus may include a pixelated photodiode array (PDA), each pixel in the PDA includes a radiation detector. The apparatus also includes a read out integrated circuit (ROIC) that includes a logic circuit and a plurality of switch elements. The plurality of switch elements being switchable between an armed state for arming its corresponding radiation detector and transmitting a signal received from the corresponding detector to the ROIC, and a disarmed state for disarming its corresponding detector and blocking transmittal of the signal, wherein in the armed state, the PDA is configured to detect an incoming optical signal and in the disarmed state, the PDA is configured to disregard the incoming optical signal. Moreover, the logic circuit controls a switch state of a selectable switch element associated with a radiation detector.

The invention discloses an intelligent belt crack and tear detection system based on machine vision and laser coupling, and relates to the technical field of belt conveying. The intelligent belt crack and tear detection system based on machine vision and laser coupling comprises a visual detection module, an image processing flow module, a laser-assisted detection module and a data processing and control module, and the visual detection module comprises double-view-angle linear array cameras (a camera 1 and a camera 2), an area array monitoring camera and an intelligent light source system; the image processing flow module comprises multi-modal feature fusion, dynamic threshold segmentation, morphological filtering and deep learning classification; the laser-assisted detection module comprises a laser array sensor; the data processing and control module comprises an edge computing unit, an upper computer system, an integrated expert system, early warning and linkage control, system automation and intelligentization, operation and maintenance cost reduction, unmanned detection, full-process automatic operation, manual inspection frequency reduction and manpower cost saving by more than 50%.

A beamforming cellular antenna includes a plurality of patch elements and a plurality of dipole elements. The plurality of patch elements and dipole elements are arranged on a planar array of said antenna into a plurality of rows and columns of elements. Each column of elements forms a sub-array connected to a plurality of signal input ports. Each column sub-array includes a plurality of both patch elements, and a plurality of dipole elements.

A multiport valve has a stemshell rotatable within a valve body with two columns of ports arranged in a planar array. An extra port extends external to the array and inlet ports communicate with selected outlet ports. The stemshell has lateral channels and longitudinal channels which cooperate with the ports at selected angular positions to provide desired inlet / outlet flows while preventing intermixing within the valve.

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.

The invention belongs to the technical field of signal processing, and particularly relates to an under-snapshot 2D-MUSIC direction finding method based on spatial translation invariance. According to the method, the space translation invariant characteristic of a uniform linear array or a uniform planar array is utilized, a calculation method of a forward and backward space-time cross-correlation function is provided, a pseudo covariance matrix is constructed by using the space-time cross-correlation function based on the Hermitian-block Toeplitz characteristic of a signal ideal covariance matrix, then a MUSIC spatial spectrum is constructed, and the wave direction is extracted. Compared with a traditional 2D-MUSIC algorithm, the method still can maintain the high-precision angle estimation capability under the condition that the number of snapshots is limited, and does not greatly improve the calculation amount. Compared with a spatial smoothing MUSIC algorithm, the method does not need to divide sub-arrays, fully utilizes the full array aperture, and avoids the loss of resolution.

The invention discloses a focal plane polarization detector based on collaborative design of a metasurface and a pixel mesa, and the detector comprises a metasurface structure which selects a pixel-level full-Stokes polarization sensitive metasurface structure, comprises a plurality of metasurface structure units which are distributed in an array, and is used for the preliminary polarization decoupling and directional convergence; the focal plane pixel element array is in pixel-level registration with the metasurface structure and comprises a multi-element plane array composed of a plurality of pixel elements, and each pixel element is provided with a table board; and the side length of each table surface is in a range of 2-3 times of the full width at half maximum of a light spot converged by the metasurface structure unit, so that the energy utilization efficiency of each pixel on a light field is considered, optical signal crosstalk of a non-convergence center area and even adjacent pixels is inhibited, and the polarization extinction ratio is further improved on the basis of polarization decoupling of the metasurface structure. According to the invention, preliminary polarization decoupling is realized, crosstalk between adjacent pixels is suppressed by combining the collaborative design of a secondary pixel table, and the polarization extinction performance of a single metasurface is broken through.

The invention discloses a dual-frequency dual-polarization duplex phased array for multi-standard communication, aims to solve the technical bottleneck of the existing millimeter wave phased array in frequency band compatibility, polarization diversity and duplex operation, and comprises a millimeter wave broadband dual-polarization end-on-fire antenna and a dual-frequency dual-polarization duplex phased array architecture. According to the phased array established by the invention, four sets of independent beam forming systems are integrated on a single printed circuit board and correspond to a first frequency band vertical polarization channel, a first frequency band horizontal polarization channel, a second frequency band vertical polarization channel and a second frequency band horizontal polarization channel respectively, and concurrent transmission and independent beam control of dual-frequency-band and dual-polarization signals are supported. The phased array realizes two-dimensional expandability based on a brick-shaped framework, can be used for constructing a planar array, and is suitable for a large-scale deployment scene. The compact size and low-cost scheme provides a high-integration, high-flexibility and high-reliability communication solution for B5G / 6G multi-standard scenes such as intelligent transportation, industrial Internet of Things and smart home.

The invention provides a distributed millimeter wave radar network-oriented DOA estimation method, a medium and equipment, and belongs to the technical field of radar signal processing. According to the method, after a large-aperture MIMO radar system is formed based on a plurality of small millimeter wave radars, a two-dimensional single-snapshot sparse array signal model is constructed by using a steering vector of a two-dimensional MIMO equivalent virtual plane array, and data interpolation and extrapolation processing are performed on aperture missing existing in a sparse array by constructing a block Hankel matrix and applying a matrix completion technology. On the basis, a fast two-dimensional angle estimation algorithm based on phase coherence factor weighting is adopted, and efficient joint estimation of the azimuth angle and the pitch angle of the target is achieved. The method can be flexibly applied to different types of distributed millimeter wave radar networks, effectively overcomes the interference effect of DOA estimation sidelobes and grating lobes in the prior art, and improves the signal-to-noise ratio level of array response.

The invention discloses a three-dimensional millimeter wave time-varying channel estimation method and device, and belongs to the field of wireless communication, and the method comprises the steps: building a millimeter wave communication system containing array motion; a three-dimensional time-varying channel model considering the Doppler effect is established, composite signals, caused by array motion, in a three-dimensional time-varying channel are analyzed, each column of a direction matrix after synthesis is consistent with the array manifold of a planar array, and it is indicated that a moving linear array can form a virtual planar array; sparse representation of a three-dimensional time-varying channel is realized through linear array motion; a three-dimensional time-varying channel is recovered based on an iterative meshless weighting algorithm of array motion; comprising AoAs estimation and path gain estimation. According to the method, the negative influence of Doppler frequency shift in the time-varying channel on channel estimation is overcome, the virtual array element is constructed, channel estimation of the three-dimensional millimeter wave time-varying channel is realized through linear array motion, the channel estimation precision is improved, and the pilot frequency overhead and the algorithm complexity are greatly reduced.

The invention provides a multi-target fast direction estimation method based on blind sparseness. The method comprises the following steps: receiving a multi-source noise-containing signal through a planar array antenna; converting the multi-source noise-containing signal into a direction angle multi-source noise-containing signal model based on the relationship among the direction angle, the pitch angle and the azimuth angle; performing equal grid division on the direction angle, and based on a division result, screening out high-probability direction angle grid points from all grid points obtained by division; generating a sub-dictionary according to the steering vector of each high-probability direction angle grid point; based on an orthogonal matching pursuit fast algorithm, obtaining an estimation signal according to the sub-dictionary, the multi-source noise-containing signal and a preset threshold value; obtaining a target signal according to the estimation signal and a preset threshold value, and obtaining direction angle information corresponding to the target signal; and converting the direction angle information corresponding to the target signal into a pitch angle and an azimuth angle to obtain a direction estimation result of the multi-source noisy signal, so that the direction estimation of the multi-source noisy signal is efficiently completed under the condition that the number of targets is unknown.

To provide a micro-optical security device having zones of color.SOLUTION: A micro-optical security device (100) with zone-by-zone color transitions includes: a planar array of light collecting elements (140); and a pictorial icon layer (120) with a plurality of retaining structures (710) defining isolated volumes at a first depth within the pictorial icon layer. The security device further includes a first zone (350) of pictorial icons, the first zone of pictorial icons having a first predetermined subset of the plurality of retaining structures comprising a hardened colored material of a first color. The micro-optical security device also includes a second zone (360) of pictorial icons comprising a second predetermined subset of the plurality of retaining structures, the isolated volumes of the retaining structures of the second predetermined subset of the plurality of retaining structures comprising a hardened colored material of a second color, the second color contrasting with the first color.SELECTED DRAWING: Figure 1

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 discloses a wireless channel prediction method based on a Mama architecture, and relates to the technical field of wireless communication, and the method comprises the steps: configuring a uniform planar array at a base station end of a wireless communication system, and modeling a channel model of the wireless communication system through the uniform planar array; obtaining a data representation of the wireless communication system based on the channel model; acquiring a historical CSI sequence based on a channel model and data representation of the wireless communication system; and constructing a channel prediction model formed by sequentially connecting an embedded module, a Mamba-based channel prediction core module and an output layer, training the channel prediction model, inputting the historical CSI sequence as input data into the trained channel prediction model, and predicting a wireless channel state to be detected to obtain a channel prediction result. According to the method, the prediction precision is high, the reasoning time required by channel prediction is remarkably shortened, the instant channel information requirement in dynamic scenes such as high-speed movement can be better met, and excellent expandability is achieved.

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.

A planar-array ultrasonic transducer, an ultrasound imaging method, and an electronic device. The planar-array ultrasonic transducer comprises a plurality of array elements, wherein the distances between adjacent array elements are consistent; the plurality of array elements are divided into a plurality of sub-array regions, and each sub-array region has M rows and N columns of array elements; the array elements at the same row and column position in the sub-array regions can be connected to the same channel line, and the array elements at different row and column positions in the sub-array regions are connected to different channel lines; the channel line is used for inputting an excitation signal of the planar-array ultrasonic transducer and / or transmitting an ultrasonic echo signal; and at the same moment, for any row and column position, at most only one array element at the row and column position in a sub-array region is connected to the channel line. The ultrasonic transducer reduces the number of channels of the ultrasonic transducer, and can realize sub-aperture transmission or reception at any position on an ultrasonic transducer planar array, thereby improving the flexibility of imaging.

The invention relates to the technical field of ultrasonic treatment, and discloses an ultrasonic phased array acupuncture system for simulating acupuncture manipulation, comprising: a signal control module comprising M signal channels, the signal control module generating different ultrasonic pulse signals in different signal channels in response to selection of acupuncture manipulation modes and sound field parameters; the ultrasonic phased array module comprises M planar array elements located on the same plane, the ultrasonic phased array module is used for receiving the ultrasonic pulse signals of the signal control module, and the ultrasonic pulse signals of the M signal channels control the M planar array elements respectively; the planar array elements comprise N focusing array elements and P angular momentum array elements; angular momentum array elements are distributed in a circular ring array; m = N + P; and the N focusing array elements and / or the P angular momentum array elements emit different ultrasonic pulses under the control of different ultrasonic pulse signals. Two sound fields are adopted, the acupuncture points of the human body are subjected to ultrasonic stimulation accurately and effectively, and the treatment effect of acupuncture and moxibustion is improved.

The utility model discloses a multi-frequency multi-port non-electrically tunable shaped antenna, comprising a reflecting plate and radiation units, the longitudinal direction of the reflecting plate is sequentially provided with a middle-broadband radio frequency unit installation area and a high-frequency radio frequency unit installation area, and the radiation units comprise a plurality of first radiation units and a plurality of second radiation units. The plurality of first radiation units are arranged in the medium-broadband radio frequency unit installation area side by side, the plurality of second radiation units are arranged in the high-frequency radio frequency unit installation area side by side, each second radiation unit comprises a plurality of second radiation subunits, and the plurality of second radiation subunits of each second radiation unit are arranged in an area array. And each second radiation unit is also in coupled connection with a filtering characteristic feed network board and a corresponding radio frequency connector, wherein the filtering characteristic feed network board is arranged on the other side, deviating from the second radiation unit, of the reflecting plate. According to the invention, it is preferentially ensured that the antenna is specifically suitable for venues, the antenna efficiency is high, and the antenna has higher performance and higher commercial value.