113 results about "Spherical array" patented technology

The invention relates to an SERS (Surface Enhanced Raman Scattering) substrate with a self-assembled spherical array, wherein a compact nanoparticle array is arranged on a substrate which is subjected to cleaning and hydrophilic modification treatment to serve as a supporting layer of the SERS substrate, and then, an active noble metal thin film is evaporated on the supporting layer. The invention further provides a preparation method of the SERS substrate. The preparation method of the SERS substrate provided by the invention can fully use particles and interstitial structures formed on the flat and smooth substrate in the noble metal evaporating process, so that the preparation method is simple and feasible, has low equipment demand, saves cost, can provide very good Raman activity so as to provide a high probability of popularization and actual application of the SERS substrate.

The present invention relates to the self-assembly of a spherical-morphology block copolymer into V-shaped grooves of a substrate. Although spherical morphology block copolymers typically form a body-centered cubic system (bcc) sphere array in bulk, the V-shaped grooves promote the formation of a face-centered cubic system (fcc) sphere array that is well ordered. In one embodiment, the (111) planes of the fcc sphere array are parallel to the angled side walls of the V-shaped groove. The (100) plane of the fcc sphere array is parallel to the top surface of the substrate, and may show a square symmetry among adjacent spheres. This square symmetry is unlike the hexagonal symmetry seen in monolayers of spherical domains and is a useful geometry for lithography applications, especially those used in semiconductor applications.

A technique for suppressing interference with unknown phase shifts received by an array of sensor elements partitions the array into a plurality of subarrays. Each subarray is processed independently to suppress the interference. Next, the resulting data from each subarray are summed together. This summed data, which effectively represents data provided by the full array with interference suppressed, may be utilized to detect and/or localize a target of interest. Each subarray is processed independently of all other subarrays. No cross-subarray processing is required. This technique is applicable to linear arrays, multi-line arrays, planar arrays, cylindrical arrays, conformal arrays, and spherical arrays. Applicable sensors include acoustic sensors (e.g., sonar, ultrasonic), electromagnetic sensors (e.g. radar), and optical sensors (e.g., infrared, ultraviolet, visible light).

The invention provides a method using accelerators to produce radio-isotopes in high quantities. The method comprises: supplying a “core” of low-enrichment fissile material arranged in a spherical array of LEU combined with water moderator. The array is surrounded by substrates which serve as multipliers and moderators as well as neutron shielding substrates. A flux of neutrons enters the low-enrichment fissile material and causes fissions therein for a time sufficient to generate desired quantities of isotopes from the fissile material. The radio-isotopes are extracted from said fissile material by chemical processing or other means.

The invention discloses an acoustic parameter near field measuring method of an underwater sound sensor. The acoustic parameter near field measuring method of the underwater sound sensor includes: serving a spherical near field measuring array which is composed of multiple small-size sensors as a receiver, measuring emission acoustic parameters of a large-size be-measured acoustic sensor which is placed at the position of a sphere center in the direction where the large-size be-measured acoustic sensor is perpendicular to a spherical array equatorial face; calculating weighting coefficients; carrying out processing weighting data to receipt signals of the spherical near field measuring array through a plural weighting coefficient, and the obtained results are equal to data which are obtained by the be-measured sensor in a distant field plane wave sound field. The acoustic parameter near field measuring method of the underwater sound sensor has the advantages of having good flexibility, being economical, efficient and practical and is suitable for confirming parameters of acoustic sensors in a specific direction. According to the acoustic parameter near field measuring method of the underwater sound sensor, measuring requirements are avoided, and acoustic parameter measurement of a large-size underwater sound sensor can be achieved in a water pool with the limited size.

The invention provides a satellite tracking device and method for a gateway station, the gateway station and a storage medium, and the device comprises: an antenna control module which is used for generating a control instruction, wherein the control instruction comprises antenna array surface dynamic configuration information; and phased array communication antenna equipment which comprises a plurality of antenna sub-arrays, and is used for combining the plurality of antenna sub-arrays into at least one phased array logic sub-array according to the control instruction, controlling the phased array logic sub-array to generate a single beam or multiple beams, and tracking at least one satellite. According to the device, the method, the gateway station and the storage medium disclosed by the invention, multi-beam access can be realized on a single phased-array antenna, so that the single antenna can communicate with multiple satellites at the same time, the occupied area of a communication antenna of the gateway station is greatly reduced, more beams can be formed on an effective area, the efficiency of a spherical array is greatly improved, and reliable tracking of the satellite can be realized.

The invention discloses a half-space beam-covered circularly polarized luneberg lens antenna for large-scale multi-beam directional communication and half-space range beam scanning. The basic structure of the antenna consists of a spherical array formed by a plurality of circularly polarized microstrip feed source antennas, a layered dielectric lens processed by the 3D printing technology and a spherical organic glass fixing support. The lens antenna uses small circularly polarized microstrip antennas as feed source antennas which from a feed source array in a hemispherical non-uniform form, the feed source array is embedded in the fixing support made of organic glass, which reduces the aperture occlusion problem during large-area beam scanning, realizes beam scanning in a half-space range, and solves a series of design and processing problems encountered in the process of designing a luneberg lens antenna in the application of half-space beam coverage, contributes to application of the luneberg lens antenna to the usage scenarios and corresponding market requirements of large-scale multi-beam directional communication and half-space range beam scanning.

The invention discloses a multi-spherical array multiband sound source rapid orientation method, and belongs to the technical field of sound source orientation and detection. A frequency space domainmodel of a multi-spherical array sound field is established based on discrete Fourier transform; a spherical harmonic domain model of the multi-spherical array sound field is constructed based on spherical Fourier transform; the spherical harmonic coefficient corresponding to the maximum modal intensity of each spherical harmonic order is selected so as to obtain the spherical harmonic coefficientafter fusion of the multi-spherical array; the frequency-dependent component of the spherical harmonic coefficient is removed and the spherical Fourier transform component only including the angle-dependent component is obtained; the cross spectrum of the spherical Fourier transform component is constructed, the spherical Fourier transform component or the cross spectrum thereof are blocked and the estimation value of the propagator is obtained through combination of the linear regression method; an orthogonalized noise subspace is constructed based on the estimation value of the propagator,and the spatial spectrum of the direction of arrival is obtained by using mutual orthogonalization of the signal and the noise; and the incident sound source direction is scanned, and the sound sourcedirection corresponding to the maximum peak in the spatial spectrum is the direction-of-arrival angle of the sound source.

The invention discloses a self-assembled modified nano gold spherical array bio-sensitive film and a preparation method thereof. A nano gold particle spherical structure of which the surface is modified with a binary mixed self-assembled film is arranged on a self-assembled unimolecule layer modified gold electrode in an array form to fix biological macromolecules so as to form a bio-sensitive film. The bio-sensitive film is prepared by the following steps of: A) mixing two thiol solvents with different carbon chain lengths of which a functional group is carboxyl at one end according to an equal proportion so as to prepare thiol mixed solution; B) soaking a working electrode in the mixed solution of the step A; C) adding the same amount of or excessive thiol mixed solution into nano gold sol solution according to a molar ratio, and adding a surfactant to prepare mixed self-assembled film saturation modified nano gold sol; D) soaking the working electrode of the step B in the nano gold sol of the step C; and E) dripping solution of biological macromolecules on the surface of the working electrode of the step D, and standing to form the bio-sensitive film.

The invention discloses a positioning method of a non-conformal surface transformation noise source based on spherical-harmonic function expansion. The positioning method comprises the following steps: constructing a transfer matrix from a spherical surface to a cylindrical surface by utilizing the spherical-harmonic function expansion and reconstructing spherical array measurement data to a cylindrical structure to accurately and effectively position the noise source in the cylindrical structure or the cylindrical noise source. Compared with the prior art, the positioning method disclosed bythe invention has the following advantages: 1) sound field information in all directions of a three-dimensional space can be measured at a time through the whole directivity and the three-dimensionalsymmetry of longitude and latitude angles of a spherical array; 2) the transfer matrix from the spherical surface to the cylindrical surface is constructed, the spherical array measurement data can bereconstructed to the cylindrical surface through a sound holographic algorithm, and the positioning problem of the cylindrical noise source or the noise source in the cylindrical structure is solved.

The invention discloses an indoor noise source localization method based on spherical surface near-field acoustic holography reconstructing reactive sound intensity. The method comprises the followingsteps: (1) calculating a three-dimensional spatial sound field data radiated by a mechanical sound source inside a regular small room; (2) using a spherical microphone array with Q array elements toacquire a sound pressure signal radiated from the target sound source to the three-dimensional space; (3) subjecting the Q pieces of microphone data of the spherical array and the first microphone data to cross spectrum analysis separately to obtain the frequency-domain complex sound pressure of the entire spherical array; (4) using a spherical near-field acoustic holographic algorithm to reconstruct the sound pressure and the mass point vibration velocity of the sound source surface; and (5) using the complex sound pressure and the mass point vibration velocity to reconstruct the surface complex sound intensity near the sound source to extract the reactive sound intensity; and determining the location of the indoor noise source by the reactive sound intensity distribution. Compared with the prior art, the method utilizes a fact that the reactive sound intensity is powerful in the near-field region of the sound source to eliminate the influence of indoor reverberation environment and effectively locate the indoor noise source.

The invention discloses an optical fiber surface enhanced raman probe based on surface plasmon effect and a manufacturing method thereof. A layer of periodic metal structure is adhered to a grinded optical fiber end surface. The manufacturing method comprises the following steps: spin-coating a PS microsphere array on a base plate, partially etching and a coating a metal film on the top of the PSmicrosphere to form a hemispherical metal structure, spin-coating polymer on the surface of the hemispherical metal surface and curing, and removing substrate; curing the obtained film with the optical fiber end surface with glue, completely removing the PS microsphere after curing, performing RIE etching to regulate the geometric dimension of the metal structure for enabling resonant wavelength of the metal structure to be consistent with excited laser wavelength, and only leaving a metal hemispherical array on the top of the optical fiber. A to-be-measured sample is adsorbed on the surface of the metal hemispherical array, a light source couples and enters from one end of the optical fiber, and the metal structure is irradiated from the inner part of the optical fiber, so that a measurable raman signal is generated by laser under action of the metal structure, and the laser is output and analyzed by a spectrograph after being collected by the optical fiber. The optical fiber surfaceenhanced raman probe is simple in structure and is suitable for processing production.

This invention discloses a technology of re-implanting balls for spherical array package chips characteriaing that said technology takes a spherical array package chip as a PCB for assembling and applies a surface sticking technology to process it, which increases success rate and quality of modification of ball-iimplantation effectively.

The invention discloses a sensor fixing device for measuring unsteady force by utilizing shock waves to load and fix a particle swarm. The sensor fixing device comprises a base and a cage-shaped bracket; the base is formed by joining a base upper cover plate and a base lower cover plate into a whole through a base liner plate; the cage-shaped bracket comprises a top cover, a bottom cover, four connecting rods and a sensor threaded connection ring; and after the equidistantly distributed four connecting rods run through the fixed base upper cover plate, the top cover is fixedly and integrally connected with the bottom cover which is arranged below the base upper cover plate, one end of a pressure sensor passes through a central hole of the fixed base upper cover plate to lead to the bottom cover, then the pressure sensor is locked on the lower end surface of the base upper cover plate through the sensor threaded connection ring, oil is filled in a space formed between one end of the pressure sensor and an inner hole of the bottom cover, and the pressure sensor is connected with a high-speed data collecting system. Due to the adoption of the sensor fixing device, unsteady force suffered by different spherical array models from the action of the shock waves can be conveniently measured, and the fixation of the pressure sensor can be realized in an experiment by utilizing shock waves to load and fix the particle swarm.

A laser cavity is provided by a reflecting spherical substrate with an array of emitters having a mode size. Each emitter has an axis aligned with a radius of the spherical substrate. A single mode waveguide is aligned with the array at an optical coupling distance less than the radius of the spherical substrate. A reflector substantially coincident with an end of the waveguide combines with the reflecting spherical substrate as a cavity.

The invention relates to a non-conformal measurement near field acoustic holography sound field rebuilding method, and relates to the technical field of acoustics. The method includes the steps that spherical wave function q(x,y) in a common wave superposition method (see the formula in the description) is replaced by a compound ray wave function with principal value directivity, by means of the method, when the holographic plane and a sound source shape are under the non-conformal condition, namely a planar array, a spherical array, a cylindrical surface array and other regular shape arrays are adopted in a holographic measurement plane, and a sound source is in an any shape, a system matrix is still in the good state of main diagonal domination, magnitude equivalence and approximate symmetry, numerical value inversion can be directly conducted on the system matrix efficiently and accurately, approximate solutions of ill-posedness problems can be obtained without using a regularization method or using the regularization method less, some variables of virtual equivalent sources are analyzed and prolongated to a complex space from a traditional real space, appropriate virtual damp is added, and therefore unique solution is obtained in the full wave number field.

The invention discloses a frequency sweeping ultrasonic focusing type sediment grain size distribution on-line measurer which comprises a pair of focusing type ultrasonic transducers, (one for transmission and the other one for receiving), a detection box body, a cable rope, a control main unit and corresponding circuits. The focusing type ultrasonic transducers adopt a spherical array focusing mode; a frequency sweeping signal generated by a signal generator is converted into an ultrasonic beam with high directionality, and then is received by the focusing type ultrasonic receiving probes with the consistent central frequency. The relevant circuits comprise a signal generation module and a signal processing module; and the core of the signal generation module is a DDS-based frequency sweeping signal generation circuit. The frequency sweeping ultrasonic focusing type sediment grain size distribution on-line measurer is simple and flexible; and according to the requirements for testing different frequencies for grain sizes of different places, the measurement range and the practicability of the measurer are improved, and the measurement precision is improved.

The invention provides a piezoelectric ceramic intelligent structure and a method for embedding the piezoelectric ceramic intelligent structure into a metal matrix. The piezoelectric ceramic intelligent structure provided by the invention comprises a piezoelectric ceramic spherical shell, wherein the middle of the piezoelectric ceramic spherical shell is provided with a spherical metal inner coreserving as an internal electrode, the outer surface of the piezoelectric ceramic spherical shell is provided with a metal coating serving as an external electrode, the outer surface of the piezoelectric ceramic spherical shell is subjected to electrode segmentation to form pressure sensor arrays arranged at equal intervals, and the piezoelectric ceramic spherical shell is internally provided witha lead channel used for leading out the internal electrode. According to the piezoelectric ceramic spherical array structure with the spherical metal inner core, piezoelectric ceramic has a high piezoelectric constant and Young modulus compared with piezoelectric fibers, and the reaction speed is high. The structure is uniform in spatial directivity, can focus and sense signals by 360 degrees, andcan be used as a signal receiver and a signal generator at the same time.

The invention relates to a high-heat-dispersion reverse solder spherical array encapsulation method which comprises the following steps of: implanting a chip into a substrate by using a binding material; pasting a spring radiator on the chip; electrically connecting the chip and the substrate by a metal lead; plastically encapsulating the spring radiator, the chip, the metal lead, the binding material and the substrate with a plastic encapsulating material to form a plastic encapsulated body; and fixing the periphery of the spring radiator by the plastic encapsulating material, wherein one end of the spring radiator is connected with the chip, and the other end is exposed out of the surface of the encapsulated body so that the heat of the chip is dispersed out of the encapsulated body. The invention solves the problems of heat dispersion in encapsulation without an exposed metal carrier plates and greatly improves the electrothermal performance and the reliability of the product.

The invention provides a spherical phased-array antenna coordinate far and near field comparison and correction method, which is small in hardware resource consumption, simple and easy to implement. According to the technical scheme, the method is characterized in that a vertical cylindrical surface of a sphere center of a spherical array antenna is divided into three horizontal sections at equal intervals, far and near field calibration antennas are arranged according to each section, on each horizontal plane, near-field calibration antennas which surround the spherical array antenna to form six near-field calibration coverage area measurement field points and three far-field calibration coverage area far-field calibration antennas are arranged at equal intervals by taking the sphere center on the tangent plane as an original point, through a far-field test and a near-field test, a far-field and near-field comparison method is given to correct array element coordinates, an array element and near-field calibration antenna coordinate correction algorithm, a far and near-field channel phase comparison algorithm and a judgment strategy are utilized to carry out correction and verification comparison on an array element and near-field calibration antenna coordinate test result, and through far and near-field array element channel calibration comparison, spherical array antenna coordinate correction is completed.

Disclosed are a substrate with a microstructure and a method for producing the same. In this method microparticles of a random allocation by means of a natural self-assembly mechanism are used to coat on a master mold. Firstly, hollow micro glass particles within a specific size range are mixed with a UV-curable adhesive to become a mixed solution. Afterwards, the master mold is dip-coated in the mixed solution and the microparticles coated on the master mold are self-assembled. To fix the microparticles on the master mold to form a sphere array microstructure with a three dimensional random allocation, a UV light source is used to radiate the master mold for curing. Afterwards, an inverse mold with the corresponding microstructure is fabricated by electroforming or polydimethylsiloxane (PDMS) casting the master mold. Thus, the inverse mold can be applied to the fabrication of a substrate with the corresponding microstructure.