247results about How to "Short design cycle" patented technology

The invention provides an anti-unmanned aerial vehicle detection system and a control method thereof. The system comprises a camera provided with an optical lens, a displayer, an automatic tracking servo mechanism controlling the camera to move, a radar device, a main controller, an interference unit, and an image identification decoder storing unmanned aerial vehicle image information. By the adoption of a photoelectric surveillance radar device combining the radar device with an optical tracking system, radar detection, optical image identification and electromagnetic interference are integrated, and the system and method play an important role in improving organic integration of unmanned aerial vehicle monitoring, the optical system and the radar device.

The invention discloses a method for designing a water-spraying boost pump hydraulic model for an efficient and large-power-density ship. The method comprises the following steps that type selection design of water-spraying boost pump hydraulic parameters is conducted, two-dimensional axial face projective geometry is determined, three-dimensional geometrical shapes of an impeller and guide blades are obtained according to a parameterized ternary reversal design method, a three-dimensional geometrical shape of a shrinkage nozzle is obtained through circumferential rotation, the three-dimensional geometrical shapes of the impeller, the guide blades and the shrinkage nozzle are combined to obtain the water-spraying boost pump hydraulic model. The method has the outstanding advantages that the design period is short, the design quality is high, and the water-spraying boost pump hydraulic model which has the advantages of being high in efficiency, compact and large in power density can be rapidly and reliably designed. The geometrical shapes of the impeller and the blades are obtained according to the parameterized ternary reversal design method, so that on the condition that the water-spraying boost pump hydraulic model is kept compact, the efficiency is improved, cavitation is restrained, and the power density is increased in the researching and developing process of a high-speed ship water-spraying boost pump.

The invention provides a UART (universal asynchronous receiver / transmitter)-based master-slave multi-processor communication system and method. The system is characterized by comprising a master processor, n slave processors and a communication bus, wherein n is a positive integer equal or greater than 1, a TX port, a RX port and an IO port of the master processor are respectively connected to the communication bus through circuits, the TX port, the RX port and the IO port of each of the slave processors are respectively connected to the communication bus through the circuits. The RX port and the TX port of the master processor and the RX port and the TX port of the slave processor are connected to the same communication bus, so that the wiring between the devices and the mutual interference of the signals are reduced. Furthermore, the extra appliance is unnecessary to add in the system, the cost is low, the design period is short, and the system can be extensively applied to the communication among multiple devices in short distance.

The invention discloses an intelligent pipeline arrangement optimization method and system based on a differential evolution algorithm. The method includes the steps of conducting mathematical modeling on a pipeline to be arranged and arrangement space so as to determine an arrangement object, the constraint condition and the evaluation criteria, coding the arrangement object through polar coordinates and posture vectors, conducting optimization solution on a pipeline arrangement optimization mathematical model according to the differential evolution algorithm, and conducting constraint condition verification and arrangement adjustment on the arrangement optimization scheme obtained through the solution so as to obtain a final arrangement scheme. By means of the intelligent pipeline arrangement optimization method and system based on the differential evolution algorithm, the design cycle can be greatly shortened, optimization performance can be enhanced, the purpose of arranging pipelines on a large scale within limited time can be achieved, and the method and the system have the advantages of being short in arrangement design time, high in optimization accuracy, capable of quantitatively evaluating the arrangement scheme and the like.

The present invention discloses a tunable substrate integrated waveguide circular resonant cavity filter. A symmetric circular SIW resonant cavity structure is used as a basic unit, and the middle dielectric substrate of the circular SIW resonant cavity structure is provided with an air slot in the diameter direction of the middle dielectric substrate. The air slot is internally provided with a metal column capable of moving along the diameter direction of the middle dielectric substrate, and a turning unit is formed by the air slot and the metal column. The main mold resonance frequency of the circular SIW resonant cavity structure is adjusted through adjusting the circle center distance between the metal column and the middle dielectric substrate. The filter provided by the invention has the advantages of simple structure and easy processing, a frequency band is in a Ku band, the tuning range of the filter reaches 18%, the main mold frequency can be adjusted continuously, and the estimated tuning can be carried out.

The invention discloses a design method of a hot-rolling strip steel rolled cooling line. The design method comprises the following steps of: determining the header arrangement mode of the cooling line; calculating the upper header flow rate; calculating the lower header flow rate; calculating the side-spraying header flow rate; calculating the hot flow density; calculating the cooling capability of a single upper header and a single lower header; calculating the total water quantity; checking the flow rate; drawing a cooling line equipment arrangement diagram; simulating the cooling process; and generating the design information report. In the design, the method of combining the rolling procedure and the equipment structure is adopted, so the whole design process is very clear. The design method can adopt the computer program for calculation, so the design period is short. The design method adopts the calculation method of combining the theoretical model and the field actual data, so the equipment parameter calculation is accurate. The design method has the advantages that the calculation result practicability is fully considered, and the complete one-package service can be provided from the cooling line design and the process calculation to bidding document making and the like.

The invention relates to a configurable floating point vector multiplication IP core based on an FPGA. The IP core comprises an operation controller, a multiplication array module and an addition array module. The operation controller is used for receiving the instruction signal, obtaining an input clock and outputting an RAM control signal and a state word to realize operation scheduling and instruction interaction; The multiplication array module is used for realizing multiplication of floating point vector elements, and the addition array module is used for realizing accumulation after multiplication of each element in the vector; The operation parallelism and the operation precision of the IP core are configurable, the flexibility and the universality are high, and the utilization rateof FPGA hardware resources is effectively improved; An operation controller is integrated, so that the problem of long design period of an FPGA-based calculation acceleration system is solved; The advantages of parallel operation and hardware reconfiguration of the FPGA are fully exerted, and parallel computing acceleration of the FPGA can be effectively realized; Especially under the condition that the current popular neural network calculation is not high in precision requirement but huge in calculation density, the arithmetic unit is reasonably configured according to the requirement, andthe resource utilization rate and the operation efficiency can be effectively improved.

The invention relates to the field of control over a reconfigurable modularized flexible mechanical arm, in particular to a trajectory tracking control method based on parameter optimization and usedfor the reconfigurable modularized flexible mechanical arm. The method includes the steps that a single-joint intelligent agent flexible mechanical arm system model is established, linear combinationof a joint motor rotating angle and a flexible mode variable is used as output of a flexible mechanical arm system by utilizing the thought of redefining the output, and through input-output linearization, the single-joint flexible mechanical arm system is decomposed into an input-output subsystem and a zero-dynamic subsystem. The input-output subsystem can track an expected reference trajectory within limited time by adopting self-adaptive dynamic terminal sliding-mode control, multi-objective optimization design is carried out on design parameters lambda<0i> and lambda<1i> by adopting an NSGA-II algorithm, the zero-dynamic subsystem of the flexible mechanical arm system is asymptotically stable near a balance point, and therefore the tracking requirement of the whole flexible mechanicalarm system on the expected trajectory is met; the trajectory tracking control method has better robustness for nonlinear uncertainty of the system.

The invention discloses an antenna structure and a designing method thereof, wherein the antenna structure comprises a line array radiating unit and an electric feeding network. The electric feeding network has an axis symmetric structure. The electric feeding network comprises an equal-power and unequal-power substrate integrated waveguide power divider and a substrate integrated waveguide phase shifter. The radiating unit is connected with the end of the axis symmetry substrate integrated waveguide feeding network. The antenna of the invention realizes a middle-and-long-distance integrated antenna based on the substrate integrated waveguide structure. The antenna can simultaneously satisfy requirements for testing the middle distance and the long distance of a radar, and switching between a plurality of transmitting antennae by means of a switch is not required. Furthermore the antenna structure has advantages of compact structure, low cost, small dimension, etc.

The invention provides a type selection design method of a main controllable pitch propeller used for a ship, belonging to ship design and manufacture field. According to the existing parameters of a hull, a host machine and a gearbox, the diameter H of a hub is selected; furthermore, the blade diameter D, the blade area ratio EAR, the pitch ratio P / D, the efficiency Eta, and the blade number z of the controllable pitch propeller are determined according to the maps of fixed pitch propeller series; the mass and the movement inertia of the controllable pitch propeller blade are determined according to experimental formula; strength checking and bearing capability checking to the hub are carried out, and the application performance requirement of the controllable pitch propeller is well met. The invention obtains the type selection design proposal, with the advantages of good safety and reliability, small design fund investment, simplified program, short design period, good system performance, convenient data processing, convenient management with computers, exact and reliable data, smaller error compared with post-design, little changes on the parameters determined by the type selection design in the process of the post-technology design of the controllable pitch propeller, convenient adjustment, thus simplifying the post-design flow, shortening the period and improving the efficiency.

The invention provides a temperature control method and a device for a polymerase chain reaction biochip. The temperature control device for the polymerase chain reaction biochip comprises a power module, a temperature collecting module, a signal amplifying module, a data collecting card module, a chip heating module and a chip cooling module. The temperature collecting module converts a resistance signal of a platinum temperature sensor on the biochip into a voltage signal through the stimulating of a power supply. The signal is inserted into a Lab VIEW signal colleting card after amplification and noise filtering. The collecting card possesses an A / D conversion function and a signal conditioning function, and then the digital voltage signal enters a LABVIEW temperature control program. An analog control signal is output through the data collecting card, the temperature of the chip is enabled to meet a reaction requirement by starting a chip heating or cooling module. A temperature control curve is displayed on a PC (personal computer) display screen in real time in a reaction process. The device provided is capable of achieving loosed-loop automatic temperature control, good in heating and cooling processes, good in stability and high in human-machine interactivity. The temperature control method and the device for a polymerase chain reaction biochip are a novel detection analysis method and novel detection analysis equipment.

A system and method for performance modeling of integrated circuits is provided. A method for performing timing analysis on an integrated circuit is provided, the integrated circuit having a timing path. The method includes computing a number of non-common timing path elements in the timing path, assigning a timing de-rate factor to the timing path based on the number of non-common timing path elements, and computing a timing analysis on the integrated circuit using the assigned timing de-rate factor.

The invention relates to the technical field of communication and in particular discloses a compact type ultra wide band polarizer. The compact type ultra wide band polarizer comprises a circular waveguide port, a transition chamfer square waveguide and an ultra wide band phase shifter, wherein the circular waveguide port is connected with the ultra wide band phase shifter by virtue of the transition chamfer square waveguide, the circular waveguide port is arranged at the two ends, one end is an input circular waveguide port, and the other end is an output circular waveguide port; the transition chamfer square waveguide is a square waveguide with four ridges chamfers; and the ultra wide band phase shifter is a square waveguide the side wall of which is provided with a horizontal ridge and a vertical ridge, and the horizontal ridge is symmetrically distributed on the two opposite side walls of the square waveguide along the axial direction of the square waveguide. In the invention, a simple and compact structure is adopted, linear circular polarization on two direction field vectors are smartly realized, technical indexes of amplitude and phase for a circular polarizer to be orthogonal with two field components are met, and the compact type ultra wide band polarizer disclosed by the invention has the advantages of compact structure, small volume, light weight, low cost, easiness in processing, easiness in tuning, high efficiency, high power capacity and the like.

The invention discloses a real-time database backup system and a real-time database backup method based on an FPGA (field programmable gate array) and relates to the FPGA and a database backup disaster recovery technology. Database operating data flows are positioned into two or multiple 1G RJ45 interfaces through the high-speed copying function of an FPGA board and are transmitted to different data servers, and databases in two or multiple data servers are simultaneously and consistently operated to realize database real-time backup.

The invention provides a realization method of a high-speed low density parity code (LDPC) decoder. The method comprises the following steps that checking node information and variable node information are updated in a decoding process, numbers and filling formats of the checking node information and the variable node information which can be processed simultaneously are selected according to a row weight and a column weight satisfied according to a coding check matrix; the obtained checking node information and the variable node information are circularly shifted and rearranged, and rearranged data are processed by using a single instruction multiple data (SIMD)instruction, finally the updated checking node information and the variable node information are obtained. The realization method of the high-speed low density parity code (LDPC) decoder disclosed by the invention is short in design cycle, low in cost, easy to modify and extend, and further solves the problem of small throughput for realizing LDPC decoding and speeds up the decoding speed.

The invention discloses an impedance simulation method for a chip capacitor in a power-supply distribution network. The problem that the capacitor impedance is unknown and accordingly the usage is influenced is mainly solved. The impedance simulation method comprises the steps of 1 manufacturing a capacitor clamp and a calibration part; 2 using a general standard part and an electrical characteristic file of the general standard part to calibrate a vector network analyzer, measuring the electrical characteristics of the manufactured standard part and saving the electrical characteristic file; 3 using the manufactured standard part and the electrical characteristic file to calibrate a vector network analyzer and measuring a scattering parameter of the capacitor; 4 converting a reverse transmission coefficient obtained through measurement into a total impedance parameter and removing installation inductive impedance to obtain the capacitor impedance; 5 adopting a vector fitting method to performing fitting on the capacitor impedance so as to obtain a high-order expression; 6 calculating the high-order expression to obtain impedance and obtaining the impedance of the capacitor with no tag parameters. The impedance simulation method achieves accurate capacitor impedance simulation, is simple and quick and can be used for obtaining an impedance parameter of the capacitor.

The invention discloses an optimization design method for a shape of an inner cavity of a turbine disc with a radial plate based on a hyperelliptic curve, and is used for solving the technical problem of long design cycle of the conventional optimization design method for a multi-arc-section curve shape. The invention adopts the following technical scheme: the method comprises the step of carrying out finite element modeling, analyzing and sensitivity solving on the cross section of the turbine disc with the radial plate by hyperelliptic curve boundary conditions and carrying out optimization iteration according to the obtained sensitivity information until a final design result is obtained by convergence. According to the method, the profile of the initial shape of the inner cavity of the turbine disc is effectively subjected to optimization design, the design cycle is short, and better horizontal stress distribution is obtained; the maximal stress after the optimization is 769.47 MPa and is reduced by 47.32% than the stress of 1460.75 MPa before the optimization; the maximal stress after the optimization by the method provided by a literature is 842.7 MPa and is reduced by 7.6% than the stress of 912 MPa before the optimization; and the method provided by the invention is low in stress concentration level of an optimization result and is remarkably superior to the background technology.

The invention relates to a polar coordinate numerical control woodworking basket milling machine which comprises a mechanical mechanism and a numerical control mechanism. The mechanical mechanism comprises a first screw rod, a second screw rod, a tool holder, a circular worktable, a first servo motor, a second servo motor, a third servo motor, a cylinderical tool and a spindle motor, wherein the first servo motor is arranged in the X-axis direction and drives the tool holder to horizontally move in the X-axis direction by driving the first screw rod; the second servo motor is arranged in the Z-axis direction and drives the tool holder to vertically move in the Z-axis direction by driving the second screw rod; the third servo motor drives the worktable to rotate by taking the center thereof as a rotary shaft; the cylinderical tool and the spindle motor used for driving the cylinderical tool to rotate are installed on the tool holder; the horizontal plane of the worktable forms a polar coordinate, a pole is the rotary shaft of the worktable, a polar axis is irradiates rays along the direction of the X axis by taking the rotary shaft of the worktable as a starting point, a polar angle is a rotation angle of the worktable, and a polar radius is a distance from the rotary shaft of the worktable to the center of the cylinderical tool. By adopting a numerical control technology, the invention can carry out three-dimensional stereo machining with high machining efficiency.

The invention discloses a composite material connecting structure. Specifically, the invention provides a reinforce sheet prepared by designing the fiber track according to the principle stress borne by the composite material connecting structure and a preparation method of the reinforce sheet. Compared with the common fabric reinforce sheet in the prior art, the reinforce sheet has the advantages of simple and convenient design, excellent reinforcing effect, no need of cutting, applicability for mass production and the like. By using the reinforce sheet to reinforce the opening part of the composite material connecting structure, the forming process is simple and flexible, the reinforcing efficiency is greatly improved, and the extremely board application prospect is provided.

The invention discloses an ESD (electrostatic discharge) protection circuit optimization method of an RFIC (radio frequency integrated circuit) based on network S-parameter extraction, and mainly solves the problems of poor accuracy and universality of the existing equivalent method and model construction method. The method mainly comprises the following steps: determining the parameters of an ESD protection device and a matching network of a port to be protected of the kernel RFIC; constructing a matching network with the ESD protection, and extracting S parameter through mixed-mode simulation; embedding the matching network into the kernel RFIC for optimized adjustment; returning and correcting the element parameters in the matching network to achieve further optimized design; and carrying out ESD testing to obtain the key parameter of the protection level. The method can accurately extract the device characteristics without constructing the complex numerical model, has higher accuracy and universality, and is suitable for the applicability evaluation and design optimization of the ESD protection device in a high-frequency circuit.

The invention discloses a device and a method for the implementation of AVS video decoding by using SOPC, belonging to the field of video decoding. The device comprises an Nios II microprocessor module and other modules. The Nios II microprocessor module is connected with a DMA controller module and other modules; a SDRAM controller module is connected with the DMA controller module and other modules as well as SDRAM; a video output controller module is connected with the SDRAM controller module and a video output module; the DMA controller module is connected with an AVS co-processing module. The Nios II microprocessor module executes software decoding control, the AVS co-processing module executes AVS hardware decoding, other modules executes auxiliary decoding, and all the modules are hung on a bus and packaged in FPGA for data interaction. The device is reasonable in software / hardware division, capable of varying software decoding procedures by modularized design and of supporting the design with other standards by hanging other co-processor cores, and has high expandability, universality and flexibility.

The invention provides a low-power extremely-high-brightness LED backlight source used for a liquid crystal projection display system. The low-power extremely-high-brightness LED backlight source comprises the following configuration methods: (1) a high-efficiency LED array and condensing-reflection bowl array arrangement manner is adopted; (b) the LED may be an LED light emitting unit consisting of one to three LEDs or LED chips with different colors of red, green and blue and at least having one green LED or LED chip; (c) a high-efficiency LED chip is adopted; (d) an aluminum-based, copper-based or thermally conductive ceramic substrate backlight circuit board is adopted; (e) the single LED chip has a rated power of 0.5 W or above, and the low-power operation manner can fully improve the LED luminous efficiency; and (f) an optical brightness enhancement membrane between a liquid crystal display screen and the LED light emitting unit is tightly attached to the liquid crystal display screen. The low-power extremely-high-brightness LED backlight source has the advantages of short design period, low manufacture cost of a key optical element (namely reflector), long service life, and high convenience in installation and maintenance, and can be used for manufacturing the backlight source of various kinds of liquid crystal projection heads-up display system.

The invention discloses a determining method of designed shrinkage of a hollow turbine blade investment casting mold, and relates to hollow turbine blade investment casting molds. The method is particularly applicable to designing of a mold cavity of a hollow turbine blade investment profile mold. A deformation model of hollow blades is obtained through a finite element method, by cutting out a series of two-dimension cross sections on a blade deformation model and a design model, and making a section line discretized into points, distances among the corresponding points are obtained to builda two-dimension displacement site; bending and torsion deformation and shrinkage deformation included in the displacement site are separated. The inner cross section and the outer cross section of theblades are subjected to line connection processing, afterwards blade stopping structures and non-stopping structures are recognized, then the wall thickness of the hollow blades is calculated, and bycalculating shrinkage of different structures, the distribution of the nonlinear shrinkage is built. Finally a shrinkage model is subjected to least square fit of cubic polynomial, and the determination of the designed shrinkage of the investment casting mold is achieved. The finished product rates of the turbine blades are greatly increased, the cycle for mold testing is shortened, and the frequency for mold testing is reduced. The determining method has the advantages of being short in design cycle, high in precision and high in efficiency.

The invention discloses an SAR ADC-based calibration method and an SAR ADC system. The method comprises the following steps: sampling the same input signal twice, and superposing disturbance signals opposite in direction on the same input signals sampled twice to obtain two quantitative results; and subtracting the two quantitative results in a numeric field, and adjusting weight value of each bitcapacitor in a capacitor array through a least mean square (LMS) algorithm to drive error to approach 0. The method is not only fast in calibration speed and high in precision, but also can realize on-chip integration.

Provided is a high-pressure industrial heat supply method for a thermal power plant. Optimization design is conducted on a large high pressure-intermediate pressure combined cylinder turbine generator set, and unconventional high-pressure industrial heat supply extraction steam is provided for heat consumers. The method specifically includes the following steps that a high pressure flow extractor 1 is shrunk to reach a high output flow area and an intermediate flow area, so that the pressure of the extractor 1 is about 10% higher than industrial heat supply extraction steam pressure when industrial heat supply steam is not extracted under a rated condition; consideration is given to reasonable feed-water temperature and a minimal pressure difference between the front and back of an intermediate regulating valve when heat supply extraction steam is rated; an industrial heat supply extraction steam opening is added to an extraction steam pipe of the extractor 1, namely, regenerative extraction steam and industrial extraction steam of the set are located in the same extraction opening, and meanwhile, a fast closing adjusting valve and a check valve are arranged on an industrial heat supply extraction steam pipeline; when loads of the heat consumers change, high output pressure is adjusted by changing the opening degree of the intermediate regulating valve, and therefore the pressure of the upstream separated extractor 1 is influenced and kept stable; the heat supply amount of the set is small, the extraction steam pressure is in a naturally pressure rising state, the intermediate regulating valve does not act, and the heat supply extraction steam pressure is kept stable through pressure reduction by a regulating valve on the heat supply extraction steam pipeline.

The embodiment discloses an automatic focimeter control device and an automatic focimeter system. An FPGA (Field programmable gate array) used as a carrier is embedded in an SOPC (system on programmable chip); a soft-core NIOSII (national institute of open schooling II) is integrated in the SOPC and used for processing the image information collected by a CMOS (complementary metal oxide semiconductor) camera; the device has the functions of binarization, low-pass filtering, edge detection and the like for the image; and the device can be used for measuring the spherical diopter, cylinder diopter, cylinder lens shaft position angle and the like of the glasses lens fast and accurately; an MCU (micro control unit) is used as a coprocessor, thus the cost of the control device can be saved; the embedded SOPC can solve the SOC (system on chip) scheme, the design cycle is short, and the cost is low; and by combining the embedded soft-core NIOSII technology, the technical effects of fast processing the image data and saving the cost can be realized.

The invention discloses an array damping-ball shock absorption device. The array damping-ball shock absorption device comprises a vertically arranged shock absorption main body and a shock absorption shaft matched with the shock absorption main body, wherein the shock absorption main body comprises an outer sleeve with both a top cover and an outer sleeve base, and the shock absorption shaft and the outer sleeve are coaxially arranged; an upper space and a lower space of the outer sleeve, separated by a lug boss arranged at one end of the shock absorption shaft, are filled with damping balls respectively; and coaxial connecting pieces are arranged on the outer wall of the upper end of the outer sleeve. According to the shock absorption device, by virtue of the extruding plastic deformation and mutual rubbing effects between the balls, the energy dissipation effect of the shock absorption device is improved, and accordingly, the shock absorption performance of the shock absorption device can be improved.

The invention discloses a product detailed design model automatic generation method based on SysML drive, which comprises the following implementation steps of: 1) inputting a system level design model of a product; 2) respectively establishing a SysML meta-model and an Express meta-model according to the system level design module; 3) establishing a mapping relation between the SysML meta-model and the Express meta-model to get a mapping model; 4) generating an executable drive engine according to the SysML meta-model, the Express meta-model and the mapping model, and then, executing the executable drive engine to obtain model exchange data based on the Express model; and 5) generating boundary representation of the product design model according to the model exchange data based on the Express model, and generating a product model data exchange standard file of the product according to the boundary representation of the product design model. The method provided by the invention is quick in development, short in design cycle, standard in design process, high in model reusability and convenient in consistency detection.

The invention provides an RPMC-comprising (replay protection monotonic counter-comprising) enhanced flash chip and a packaging method thereof. The RPMC-comprising enhanced flash chip comprises a flash, an RPMC, and a memory chip, wherein the flash and the RPMC are packaged together and the memory chip is connected with the RPMC. Both the flash and the RPMC comprise respectively independent controllers. Same IO (input and output) pins in the flash and the RPMC are interconnected and are connected to a same external shared pin of the chip. Both the flash and the RPMC further comprise internal IO pins. The RPMC and the memory chip further comprise signal transmission IO pins. By the RPMC-comprising enhanced flash chip, the problems of high complexity, long cycle, high cost and large chip area in chip design are solved.