284 results about "Square array" patented technology

It is the general calibration method of model-surface optical measuring system. Calibration board on which is located evenly with black rhombic square array in the white background and projector calibration grating of corresponding rhombic square array are uniquely employed in this invention. The calibration board position is corrected by laser to make the projector to project rhombic square array into the white interstice on the calibration board whose images before and after shutting up the projector is recorded by the camera used as calibration image. Then the basic data are obtained through the processing of the calibration image and accordingly the space coordinates of the projector calibration dots can be calculated. The calibration of the projector is realized on the basic datum through matching the coordinates of corresponding calibration dots of projector image. According to the relationship between the coordinate systems of projector and camera the calibration of systematic geometric parameter can be realized. The invention is of great engineering utility and can solve the accuracy problem of automatic extraction and realize the integrated calibration of camera and projector.

The invention discloses a Ku frequency band double-frequency dual-polarization micro-strip plane reflective array antenna. A plane medium substrate is provided with two kinds of frequency passive micro-strip resonance units, each kind of frequency units is arranged in equal rows and equal lines, the distance between every two rows is equal to that between every two lines, the distance is less than or equal to one half of the wavelength of the highest work frequency free space, and each second frequency unit is located at the center of every four first frequency units in a square array. The center of all the first frequency units is provided with a set of gaps, the center of all the second frequency units is provided with a set of gaps perpendicular to the gaps of the first frequency units, and polarization in the two perpendicular directions is formed. Each kind of frequency units is of loop line patch structures with at least two layers, and the size of a loop is determined according to the phase position needing compensation. According to the Ku frequency band double-frequency dual-polarization micro-strip plane reflective array antenna, the phase difference between a feed source and the space of each unit on the array surface is compensated by regulating the size of each micro-strip unit on the medium substrate, reflected waves achieve same-phase superposition in the special direction, pencil beams are formed, and the purpose of high gain is achieved.

The invention discloses a three-dimensional three-phase photonic crystal structure based on the local resonance mechanism. The structure is formed through the steps that high-density cores are uniformly coated with elastic coating layers to form scattering units, and the scattering units are periodically arranged in a square array mode and connected with one another through low-density hard connecting bodies. A preparation method is characterized by comprising the steps that a two-dimensional periodic structure composed of the connecting bodies and the coating layers is prepared through a 3D printing technique based on photocuring molding, and after the high-density cores are arranged in the coating layers, the two-dimensional periodic structure is stacked layer by layer and assembled to form the complete three-dimensional periodic structure. The structure and the preparation method thereof have the advantages that low-frequency acoustic wide band gaps are obtained while the structure size and the structure weight are decreased, and by applying the 3D printing technique based on photocuring molding, the multi-phase complex three-dimensional photonic crystal structure is easier and more flexible to prepare.

The invention discloses a receiving system of a multi-pixel superconducting detector. The system consists of a terahertz frequency range local oscillator signal source, a wideband wave beam separator, a Michelson interferometer, a superconducting SIS or HEB detector array, a multi-channel direct-current bias supply, a multi-channel reading circuit and band frequency spectrum processing unit, a low-temperature and low-noise amplifier and a normal-temperature intermediate frequency and matched high-resolution frequency spectrum processing unit, wherein the terahertz frequency range local oscillator signal source adopts a millimeter wave band solid local oscillator source and is formed in a way of frequency multiplication amplification; the wideband wave beam separator adopts a 15 to 75-micron Myler membrane which has high permeability in a terahertz frequency range; the superconducting detector adopts a superconducting SIS detector in the terahertz frequency range and adopts a superconducting HEB detector in a high frequency range; the low-temperature and low-noise amplifier adopts a low-noise amplifier integrating MMIC technology; and the high-resolution frequency spectrum processing unit adopts digital frequency spectrum technology with high resolution. The layout of the multi-pixel superconducting detector adopts a square array of which the technique is easy to realize, makes the main wave beams of the remote radiation fields of plane antennae integrated on each superconducting detector pixel not overlapped on the basis of a compact structure at the same time, and ensures that signals received by the multi-pixel superconducting detector are interfered by neighboring pixels as low as possible.

The invention relates to a method for positioning an underwater magnetic target in a high-precision and long-distance mode through a total geomagnetic field. The method includes the steps that a plane square array is formed by arraying four magnetic sensors on the water surface or under the water surface; a first sensor measurement value, a second sensor measurement value, a third sensor measurement value, a fourth sensor measurement value and the distance between each sensor and the target are collected; the orientation coordinates and target magnetic moment of the target are worked out; all time parameters are output, and target motion tracks are described. According to the method, target positioning is achieved by detecting the single scalar of the total geomagnetic field. Because the total geomagnetic field is measured, gesture and orientation correction is not needed for convenient installing and use of a magnetometer. Due to the adoption of a magnetic field difference algorithm, the influence of time variant of the total geomagnetic field and the influence of spatial environment magnetic field distribution on magnetic positioning can be excluded; by means of the positioning method, the positioning precision is high, and the measured distance is long.

The invention discloses a linear polarized incident electromagnetic wave perfect reception wireless energy flat, which is formed by repeatedly arranging and extending at least one square array unit. Four square circular polarized pasters which are arranged in a form of a Chinese character 'tian' are etched on a first conductive thin layer; metal through holes are etched on the square circular polarized pasters; the metal through holes of two adjacent square circular polarized pasters connect to an input terminal of a two-in-one microstrip line power synthesis circuit on a third conductive thin layer by passing through an interlayer; the output terminals of all two-in-one microstrip line power synthesis circuits on a third conductive thin layer constitute a power synthesis network by sequential cascading; the output terminal of the power synthesis network is connected to an input terminal of a high frequency rectification chip; and the output terminal of the high frequency rectification chip obtains DC power output. The invention can realize effective collection and utilization of linear polarized incident electromagnetic wave in any direction in the three-dimensional space, and the cost is low and the structure is simple.

The invention relates to a calibration plate and a thermal infrared camera calibration method based on the same. The calibration plate comprises a square substrate, wherein a checkerboard layer for visible light camera calibration is arranged on the substrate; the checkerboard layer is positioned on the front surface of the substrate; the checkerboard layer is an international chessboard pattern layer formed by black and white square arrays with the same size; a temperature-controllable circular heating piece for thermal infrared camera calibration is mounted on the front surface of each black square; the circular heating piece is connected with a heating circuit; the circular center of the circular heating piece is superposed with the center of the black square; the circular heating piece is positioned within the boundary of each black square. When the calibration plate is adopted for the thermal infrared camera calibration, the calibration method is simple and accurate; the calibration plate is convenient to manufacture, low in cost and convenient to popularize; the calibration plate and the thermal infrared camera calibration method based on the calibration plate can be directly applied to the field of calibration of infrared imaging instruments for weather study, aviation and surveying and mapping and the like.

The invention belongs to the technical field of mass transfer, and particularly discloses a Micro LED mass transfer device and method based on demagnetization through selective heating. The device comprises a substrate and a magnetic square array arranged on the upper surface of the substrate, wherein each magnetic square in the magnetic square array has magnetism, and the upper surface and the lower surface of each magnetic square are different magnetic poles; each magnetic square can lose magnetism under the action of external heating. When transfer operation is performed, the magnetic square array is in one-to-one correspondence with the Micro LED array with the magnetism, the magnetic square array is adopted to integrally pick up the Micro LED array, then the magnetic squares are selectively heated to allow the magnetic squares to lose the magnetism to selectively transfer the Micro LED onto a target circuit substrate with the magnetism. The Micro LED mass transfer device and method can achieve the patterning and selectivity mass transfer of the Micro LED, and is high in applicability and accurate in positioning, etc.

The invention provides a multilayer ultra-wideband wave-absorbing body based on electric loss material and magnetic material combination, and belongs to the technical field of microwave electromagnetic stealth. A wave-absorbing structure comprises six resistance film layers, a magnetic absorption layer, a metal reflection layer and a resistance film interval supporting layer. The six resistance film layers and the magnetic material form a laminated structure; the interval between the every two resistance film layers is T; and the thickness of the magnetic layer is H. The unit structures of theresistance film layers are square array structures with the sizes of L1, L1, L3, L4, L5 and L6 from top to bottom, and the unit period is P. Based on the reasonable structural design of an electric loss material and a magnetic material, the ultra-wideband wave-absorbing effect is achieved, and high-intensity absorption is achieved in certain frequency bands; due to the symmetry of the structure,the structure is insensitive to the polarization of electromagnetic waves; and the broadband large-angle absorption effect is enhanced due to the gradual change design of the multiple resistance layers.

The invention discloses a broadband high-performance manual terahertz wave-absorbing material and a design method thereof. The broadband high-performance manual terahertz wave-absorbing material comprises a plurality of material units, wherein each material unit comprises chromium and photoresist SU-8, specifically, a metal chromium film is arranged on a substrate, and is used as an anti-transmission layer; the photoresist SU-8 and square arrays of the chromium are alternatively overlapped on the metal chromium film from bottom to top to form a pyramid shape; five layers of the square arrays of the chromium are arranged, wherein the thickness of each layer of 200nm, the side lengths of each square arrays are sequentially regularly reduced from bottom to top, and are sequentially 70 micrometers, 66 micrometers, 62 micrometers, 58 micrometers and 54 micrometers from bottom to top; the thickness of each layer of photoresist SU-8 is 4 micrometers; the period of the material units is 95 micrometers. According to the broadband high-performance manual terahertz wave-absorbing material, the large broadband absorbing effect of a terahertz wave band is realized, the process limit of making a conventional metamaterial is broken through, and the design and the making of a three-dimensional manual special medium of the terahertz wave band are completed.

A square array of signal points forming a 2²ⁿ-QAM signal constellation, where n=3, 4, is modified by relocating the inner most 2²ⁿ/16 and outer 2²ⁿ/16 constellation points to specific positions, resulting a modified-square constellation with a reduced peak to average power ratio (PAPR) at the modulator output relative to that of the square constellation while resulting in a receiver sensitivity that is degraded by less than the decrease in the modulator's PAPR and hence less than the possible improvement at the transmitter in average transmitted power.

The invention provides a novel adjustable moulding bed for a ship. The novel adjustable moulding bed comprises mould plates, reinforcing plates and a plurality of supporting moulding column; the multiple supporting moulding columns are arranged in a rectangular square array mode; each mould plate is connected between every two supporting moulding columns; each reinforcing plate is connected between every two mould plates; each supporting moulding column comprises a bottom seat, an adjusting mechanism and a top seat; each adjusting mechanism is connected between each top seat and the corresponding bottom seat; each mould plate is connected between the top seats of every two supporting moulding columns; a plurality of connection grooves are formed in the long edge direction of the mould plates; and the reinforcing plates are fixedly connected into the connection grooves. According to the novel adjustable moulding bed for the ship, the height of the supporting moulding columns can be adjusted through the adjusting mechanisms, so that the height of the whole moulding bed is adjusted, and the novel adjustable moulding bed can adapt to sectioned building of various ship bodies and is high in universality; and meanwhile, the high precision of a built ship body section linetype can be ensured by arranging the mould plates and the reinforcing plates.

The invention provides a bone filling material of three-dimensional grid structure and a preparation method thereof. The material is characterized in that the material comprises a three-dimensional structure body and alveolate cavities are distributed at all the surfaces of the three-dimensional structure body. The alveolate cavities are in regular grid arrangement and the regular grid is of square array, rectangular array, triangular array, rhombic array or hexagonal array constructed by cylindrical boundaries. The bone filling material is suitable for mixed repair of bone injury.

The invention provides a modeling method for a photovoltaic power generation system model. The method includes the steps: selecting and calculating a photovoltaic power generation system calculation base, and converting a power grid load flow calculation unit value into a photovoltaic power generation system calculation unit value; calculating a transient initial value of a photovoltaic power generation system; building a photovoltaic square array model; and building a grid-connected photovoltaic inverter model. The modeling method is used for modeling a positive sequence component of the photovoltaic power generation system and can be extended into a modeling method for modeling the positive sequence component and a negative sequence component, the model is applied to transient, stable and analytical calculation of a photovoltaic access power grid, and basic model platform support is provided for planning and design of the photovoltaic access power grid and research of the interaction relationship between the photovoltaic access power grid and a power grid.

The invention provides a laser transmission welding follow-up clamping device, which is a welding and clamping device used for laser transmission welding plastic material or plastic and metal plastic. The device is characterized by comprising a support assembly, a pressure head assembly and a pressure head fixing assembly; the support assembly consists of hydraulic thimble components which are arranged in a square array and a support plate; each hydraulic thimble component schedules any one hydraulic thimble component through a PC (personal computer) terminal program; the overall support plate is controlled by a hydraulic control system to perform Z-directional movement; the pressure head assembly consists of a laser head, a pressure sensor and a compressing small roller wheel; the pressure head component performs X and Y directional movement under the driven of a servo motor; the compressing roller wheel can be adaptively adjusted at Z direction, so as to interact with a follow-up thimble under the compressing roller wheel to realize follow-up clamping for workpieces. According to the device provided by the invention, the extension height of the thimble rod required to be adjusted is satisfied, thus, the workpiece in any shapes can be adapted by the device, and the clamping problem of the curved surface type welding seam can be effectively solved.

Interpolation precision of phase difference detection pixels is raised. An image sensor (14) is provided with a color filter (30) upon which a basic sequence pattern, formed by disposing a first sequence pattern and a second sequence pattern in point symmetry, is repeatedly disposed. In the first sequence pattern, first filters are disposed on pixels in the four corners and in the center of a square array of 3×3 pixels, second filters are disposed in a horizontal line in the center of a square array, and third filters are disposed in a vertical line in the center of a square array. In the second sequence pattern, the first sequence pattern and the positions of the first filters are the same, while the positions of the second filters and the positions of the third filters have been swapped.

The invention provides a monitoring method for corrosive damage of the hole edge of an aluminum alloy porous structure based on an iterative algebraic reconstruction algorithm. The monitoring method comprises the following steps: firstly, selecting a porous aluminum alloy, and arranging piezoelectric sensors by a square array layout; secondly, adopting a sine wave exciting signal; thirdly, imaging the damage by applying a tomography scanning algorithm of ART according to the network layout of the piezoelectric sensors and selected signal characteristic quantity; fourthly, carrying out location imaging on the damage by analyzing a correlation coefficient of Lamb waves; fifthly, adopting mean filtering processing, and solving a value of a final pixel by using a mean of a template to replace a value of an original pixel. According to the monitoring method disclosed by the invention, by performing the steps, different piezoelectric sensors are acquired by layout optimization of the piezoelectric sensors and signal monitoring; characteristic parameters are extracted by signal processing, the corrosive damage degree of a porous aluminum alloy member can be quantitatively characterized, and the function of monitoring the corrosive damage of the aluminum alloy structure in real time can be realized.

The invention relates to a temperature-interference-resisting optical metasurface focusing imaging element, which comprises a silicon dioxide substrate and silicon carbide nanorods, wherein the nanorods are sorted in a square array on the substrate, and are rotated by a preset angle to modulate the phase of incident light. The temperature-interference-resisting optical metasurface focusing imagingelement is a metasurface lens composed of the sub-wavelength interval nanostructure cuboid array, is high in integration level, small in size and small in thickness and can be in the micron dimension.

The invention provides an image sensor structure for realizing physical consolidation of pixels. The image sensor structure comprises a pixel unit circuit array and filters, the filters cover all pixels in the array, and the array is formed by combining and extending multiple red, blue and green pixel unit circuits which meet the minimum BAYER pattern. Each pixel unit circuit comprises four pixels, one pixel unit circuit is only covered by the filter in one color, and the pixel unit circuits are arranged at intervals according to the minimum square array. The invention also provides a method for realizing physical consolidation of the pixels. By controlling peripheral circuits in the pixel unit circuits, signals of every four pixels are read at the same time, and physical consolidation is completed. The structure and method realize direct consolidation of photoelectrons through physical consolidation, errors caused by introduction of digital-to-analogue conversion are avoided, special data algorithms and complex peripheral circuits are not needed, and the sizes of the pixel units can be further reduced conveniently through a new framework with transistor pixels shared.

The invention discloses a two-dimensional bar code. The two-dimensional bar code is characterized in that: the two-dimensional bar code is a square array formed by square modules and comprises a data area of three encoding information areas and a functional area including a view finding pattern, a positioning pattern, a validation block and a blank area. The two-dimensional bar code can not only optimally meet the special requirements of an error correction coding algorithm on the arrangement of the matrix code encoding information in an encoding area, but also embody special character symbols with certain meaning on the appearance of symbols; moreover, the two-dimensional bar code realizes the continuous setting of a two-dimensional matrix code on the size dimension of the appearance, and has a certain degree of capacity of resisting frame fouling and a wide application scope.

The invention discloses a mine vehicle square array formation control system, which is divided into a multi-operating-mode switching module, a desired vehicle spacing calculation module, an acceleration calculation module and an early-warning module. When calculating desired longitudinal vehicle spacing, the mine vehicle square array formation control system considers the influences of controlledmember vehicle load capacity, brake action delay and square array delay, considers the influences of desired brake spacing and desired parking spacing at the current road surface level, and prevents rear-end collision accidents of controlled member vehicles caused by emergency braking in case of emergency. The mine vehicle square array formation control system provides four operating modes, whichare respectively an efficient mode and an energy-saving mode according to the operating conditions, and a slippery mode and a foggy night mode when the road surface condition is poor or the visibilityis low, and the driving safety of a vehicle team is guaranteed; and when driving on an unstructured road and an open space without a road as well as driving intermountain, an auxiliary vehicle driverperforms driving control over an auxiliary vehicle, and following vehicles follow the corresponding auxiliary vehicle in driving, thereby expanding the adaptability of the mine vehicle square array formation control system to the terrain.

A color filter array includes a basic array pattern P1 constituted by a square array pattern corresponding to 3×3 pixels. In the color filter array, basic array pattern P1 is arranged in a horizontal direction and a vertical direction repeatedly. G filters that are brightness system pixels are arranged at the four corners and the center, that is, arranged on the both diagonal lines. The G filters are in each line of horizontal, vertical, and diagonal directions of the color filter array, and the color filter array includes a square array that corresponds to 2×2 pixels that are constituted by the G filters. A ratio of the number of G pixels that help most to obtain a brightness signal of the basic array pattern P1 is greater than each ratio of the number of R pixels and the number of B pixels that correspond to the color other than G.