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Automobile video frequency discrimination speed-testing method
InactiveCN101105893AImprove accuracyReduce reflective effectRoad vehicles traffic controlCharacter and pattern recognitionLight reflectionComputer science
The invention discloses a vehicle video identification and speed measuring method. The concrete steps are as follows: (a). obtain a vehicle picture; (b). search the partial threshold value of vehicle license plate on the vehicle picture to obtain the license picture; (c). redress the inclination of the license picture; (d). search the frame of the license plate on the redressed picture and calculate the height of characters; (e). standardize characters on the license plate to obtain a number of partial blocks; (f). carry out the binary system for the partial blocks of each character to obtain two-digit pictures; (g). identify characters on the two-digit pictures to obtain characters on the license plate; (h). track the moving route of the license plate through results of step b and d; (i). calculate the moving distance of the vehicle body; and (j). calculate the running speed. The invention has the advantages of high precision of identifying vehicle licenses and low impact on light reflection of license plate, easy realization, and high practical value.
Owner:SHENYANG JIANGLONG SOFTWARE DEV TECH
Method for checking reality of ocean color remote sensing product
InactiveCN103020478AHave diversityReasonableSpecial data processing applicationsData setData authenticity
The invention discloses a method for checking the reality of an ocean color remote sensing product. The method comprises the following steps: (1) reconstructing a long time sequence remote sensing data set; (2) computing and integrating based on the time-space variation characteristics of the remote sensing data set; (3) carrying out quality control and screening on a practical measurement data set for checking the remote sensing product; (4) checking generation of data sets by practical measurement-remote sensing data based on a time-space matching rule; (5) carrying out risk level division on the eligible matched data sets; and (6) computing indexes for checking the data reality of the remote sensing product. According to the method, the representativeness and the reasonability between the remote sensing product data and the checking practical measurement data can be checked, the matched data sets are screened and generated, and an evaluation method for different risk levels is obtained, so that the evaluation results are diversified and reasonable, the uncertain risk in the checking process is lowered, and the checking credibility is improved.
Owner:HANGZHOU NORMAL UNIVERSITY
Navigation speed and navigation direction cooperative control formation navigation control method based on leader-follower method
ActiveCN107168329ATroubleshoot navigation control issuesEasy to operatePosition/course control in two dimensionsPotential fieldOperability
The invention discloses a navigation speed and navigation direction cooperative control formation navigation control method based on a leader-follower method. Compared with a routine formation navigation control method, the navigation speed and navigation direction control method has advantages of realizing definite control task assignment and definite physical meaning, overcoming a problem of incapability of settling controlling of formation keeping according to an artificial potential field method, realizing high engineering operability and high applicability, and realizing no requirement for artificial intervention. The navigation speed and navigation direction cooperative control formation navigation control method can be widely used for settling a ship formation navigation control method in an unmanned environment and is particularly suitable for satisfying a requirement in ship formation navigation of occasions such as a water target field and a high-danger water area. Particularly, through adding acceleration and navigation direction control restraining in a formation forming process, the method is suitable for formation forming and formation keeping controlling in formation controlling. Furthermore the method is particularly suitable for satisfying the navigation requirement of the ship formation in occasions such as the water target field and high-danger water area.
Owner:NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH
Voice search method, step top box, storage medium, server and system
InactiveCN107222757AImprove search accuracyImproved keyword recognition rate and video search accuracySpeech recognitionSelective content distributionSearch wordsSpeech sound
The embodiment of the invention discloses a voice search method, a set top box, a storage medium, a server and a system. The method is applied to searching video resources, and comprises the steps of converting received voice information into text information; resolving a keyword from the text information according to a preset resolving rule; determining a search word corresponding to the keyword according to the keyword and a preset corresponding rule; and submitting the search word to a search server, thus allowing the search server to search a preset video resource library according to the search word and a preset search rule. In the technical scheme of the method provided by the embodiment of the invention, the keyword is resolved from the voice information has been converted into the text information according to the preset resolving rule, the search word corresponding to the keyword is determined according to the preset corresponding rule and submitted to the search server to search the video resources, so that improvement on a voice recognition rate and search accuracy can be achieved, operation is simple, practicability is strong, and user experience on voice search is enhanced.
Owner:SHENZHEN SKYWORTH DIGITAL TECH CO LTD
Arranging method of sensor for detecting fatigue stress of steel box girder bridge
The invention discloses an arranging method for a sensor for detecting fatigue stress of a steel box girder bridge based on a fatigue damage degree index, comprising the following steps: calculating fatigue stress of at a steel box girder candidate measure point area through the finite element model technology; constructing the fatigue damage degree index based on an S-N curve and a Miner linear damage accumulation theory provided by design specifications; and determining an arranging position of the sensor for detecting fatigue stress of the steel box girder bridge according to size of the fatigue damage degree index. The method provided by the invention effectively ensures analysis precision for fatigue stress of the steel box girder bridge by using the finite element model analysis technology, constructs the fatigue damage degree index of the steel box girder bridge on that basis, and provides reasonable evidence for selecting the arranging position of the sensor, so that subjectivity, empirical property and blindness for arranging the traditional steel box girder fatigue stress sensors are effectively overcome, and the method will be certainly applied and popularized widely.
Owner:SOUTHEAST UNIV
Automobile tire blew-out safety and stability control system
InactiveCN108715163AImplement Stability ControlAdvanced technologyVehicle condition input parametersSteering wheelControl system
The invention discloses an automobile tire blew-out safety and stability control system for manned and unmanned vehicles, is based on vehicle braking, driving, steering and suspension systems, and belongs to the field of automobile tire blew-out safety. The system establishes the tire blew-out determination of tire pressure detection, a state tire pressure and a steering mechanics state mode, andadopts an automobile tire blew-out safety and stability control mode, a model, an algorithm, a control structure and a flow; based on tire blew-out state points, through conversion of tire blew-out control entering and exit and normal and tire blew-out control modes, vehicle braking, driving, steering, steering wheel rotation force and suspension balance control are coordinately conducted, the real or non-real tire blew-out process overlapped tire blew-out control is achieved; under the conditions of rapid changes of the tire blew-out process state and the movement state of blew-out tires andvehicles, technical barriers such as severe instability of the tires and the tire blew-out, the difficulty in controlling the extreme state of the tire blew-out and the like are broken through, and the system solves the major problem which long plagues the automobile tire blew out safety.
Owner:吕杉 +1
Autoignition coal gangue flow slope extinguishment and steadiness comprehensive treatment technology
InactiveCN103410140AChange structural propertiesBlock flowFire rescueExcavationsSurface layerEcological environment
The invention discloses an autoignition coal gangue flow slope extinguishment and steadiness comprehensive treatment technology, and belongs to the field of treatment of mineral product waste and ecological environment recovery. The autoignition coal gangue flow slope extinguishment and steadiness comprehensive treatment technology comprises the steps that shallow-hole curtain filling is adopted, and after dedicated grouting pipes (4) which are preset are regularly planted into a slope body of a coal gangue flow slope and grouting is carried out, and steel wire ropes (9) are used for carrying out net-shaped connection on ground surface nodes (5) of the grouting pipes (4). The effect of steel rib piling and the effect of grid connecting piling can be achieved, the effect of solidification grouting or the effect of curtain grouting can be achieved, flow of air and water in the slope body of the coal gangue flow slope can be effectively stopped, the chimney effect is eliminated, when evaporation of water is received, cooling extinguishment is preferentially carried out, a curtain is solidified to block the air and prevent fire, and can achieve the effect of preventing a forward landslide, the foundation is laid for later-stage surface layer ejection grouting blocking and soil dressing vegetation recovery, and the autoignition coal gangue flow slope extinguishment and steadiness comprehensive treatment technology is good in enablement and easy to operate, can ensure that ecological environment comprehensive treatment of the coal gangue flow slope can be achieved fundamentally and rapidly, and is beneficial to human and the society.
Owner:赵平
Ship autonomous navigation control system and control method
ActiveCN105511464AAchieving autonomous track tracking control requiresAutonomous track-following control needs to be addressedPosition/course control in two dimensionsControl systemOperability
The invention provides a ship autonomous navigation control system and method. Aiming at function loss of an autopilot and the use limitations of a track autopilot, the system and method avoid a continuous expected navigation track. The method can meet the demands of the autonomous navigation tracking control of a chip through employing a series of key discrete points of the expected navigation track. The method does not need manual intervention, can be widely used for solving a problem of autonomous navigation control of the ship in an unattended environment, and is especially suitable for the autonomous navigation of the ship in the occasions of a water surface target field and high-danger water regions. The method irons out the defects of the functions of a navigation autopilot, approaches the tracking control performance of the track autopilot, but does not need to enable a continuous expected navigation track to serve as tracking input. Compared with a conventional method of navigation tracking control, the method is high in engineering operability and implementation performance, and can be widely used for meeting the demands of autonomous navigation control of the ship.
Owner:NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH
Tunnel traffic congestion quick evacuation method and control system
ActiveCN106408956AAvoid congestionShorten the timeControlling traffic signalsArrangements for variable traffic instructionsSocial benefitsMicrowave
The invention discloses a tunnel traffic congestion quick evacuation method and a tunnel traffic congestion quick evacuation control system. According to the tunnel traffic congestion quick evacuation method and the tunnel traffic congestion quick evacuation control system, when a traffic accident occurs in a tunnel, the normal passage of vehicles is disabled, all upstream vehicles arriving at the accident point begin to queue up; a plurality of roads which are just slightly affected by the accident are selected as emergency lanes; N control points are set in the in the queuing length of the queued vehicles, so that the vehicles in the whole road can be segmented into N parts; the queued vehicles pass the accident point intermittently according to the marks of the control points. The control system is composed of a remote control center, a traffic detection unit and a traffic evacuation and guidance unit; the traffic evacuation and guidance unit includes a microwave vehicle detector and a video surveillance camera which are connected with the remote control center; and when the traffic detection unit detects a traffic accident, the traffic evacuation and guidance unit is started. With the tunnel traffic congestion quick evacuation method and the tunnel traffic congestion quick evacuation control system adopted, the problem of the congestion of the traffic of the tunnel can be solved, and a lot of time can be saved for the vehicles. The tunnel traffic congestion quick evacuation method and the tunnel traffic congestion quick evacuation control system have high implementation possibility and higher economic and social benefits.
Owner:CHANGAN UNIV
Bionic cleaning water-based paint and preparation method thereof
InactiveCN105733385AAchieve sustained releaseThe effect of long-term lubrication and cleaningAntifouling/underwater paintsPaints with biocidesRough surfaceWater based
The invention discloses cleaning water-based paint with a bionic self-lubricating effect, and a preparation method thereof. By utilizing the characteristic that the surface is self-lubricated through a common nepenthes imitating effect, and adopting a mode of loading silicone oil on aerogel, a silicone oil lubricating fluid with the lubricating effect is sealed into a water-based resin paint base material; by combining adsorption of an aerogel porous structure and transfer behaviors, on a water-based resin surface, of silicone oil, the controlled release effect, on the surface of the water-based paint base material, of the silicone oil lubricating oil is achieved, and long-time self-lubricating cleaning effect is achieved. According to the preparation method, a super-hydrophobic rough surface is not needed to be constructed; the prepared paint has self-cleaning effect, good stability, environmental protection and no pollution; the preparation method is simple, is innovative, is high in implementation, and is more beneficial to industrial application.
Owner:宁夏金石通新材料有限公司
Vehicle damage resistance evaluation method based on digital twinning
ActiveCN110348103AImprove fidelityGuaranteed real-timeGeometric CADDesign optimisation/simulationInteraction systemsVirtual vehicle
The invention discloses a vehicle damage resistance evaluation method based on digital twinning. The vehicle damage resistance evaluation method includes the steps: firstly, digitalized twinning is carried out on a physical vehicle; a digital twinning model with high simulation is established; and the model comprises four systems, namely, a virtual vehicle firmware system, a dynamic real-time interaction system, an external information interaction system and a vehicle state monitoring system. On the basis, a damage subsystem of the vehicle is constructed through external services, and simulation attack is conducted on the digital vehicle, and the damage effect is evaluated through a vehicle state monitoring system and various methods, so that damage resistance evaluation data of the vehicle are obtained, and damage resistance evaluation is conducted on the vehicle.
Owner:BEIHANG UNIV
Method for predicting remaining useful life of steel box girder bridge top plate-longitudinal rib welding detail
InactiveCN102621220AStrong implementationOvercome subjectivityAnalysing solids using sonic/ultrasonic/infrasonic wavesStrength propertiesNon destructiveFatigue damage
The invention discloses a method for predicting the remaining useful life of a steel box girder bridge top plate-longitudinal rib welding detail subjected to fatigue cracking in an operating state. The method comprises the following steps of: detecting the fatigue crack of the steel box girder bridge top plate-longitudinal rib welding detail by an ultrasonic non-destructive detection technology, determining the position of the welding detail subjected to fatigue cracking, and measuring the extension depth of the fatigue crack in a top plate; and arranging a strain sensor on the top plate at the welding detail subjected to fatigue cracking to acquire a fatigue load effect spectrum under the action of an actual operating vehicle, establishing a fatigue fracture limit state equation of the welding detail according to a linear elastic fracture mechanics theory, and calculating the remaining useful life of the top plate-longitudinal rib welding detail. By the method, the respective advantages of the non-destructive detection technology and a health monitoring technology can be fully exerted to meet the fatigue evaluation requirement of the steel box girder bridge top plate-longitudinal rib welding detail in the operating state, and the defects of subjectivity and blindness of the traditional fatigue damage evaluation method for a steel box girder bridge are effectively overcome.
Owner:SOUTHEAST UNIV
Application of candida utilis to loquat wine making and making method for loquat wine
InactiveCN102649926ASolve the problem of weak acid reduction abilitySoft tasteAlcoholic beverage preparationMicroorganism based processesFood flavorBiology
The invention discloses application of candida utilis to loquat wine making and also discloses a making method for the loquat wine. The method comprises the conventional steps of pretreating raw materials, performing enzymolysis and fermenting and further comprises the step of inoculating the candida utilis in the fermenting step, wherein in the fermenting step, the inoculation quantity of the candida utilis is 105 to 106 cfu / ml. The invention has the benefits that the candida utilis solves the problem of weak acid-reducing ability of the wine-making yeast and consumes malic acid with stimulating mouthfeel; the candida utilis increases the content of lactic acid and the like in the loquat wine and has soft mouthfeel; and the candida utilis increases the content and the type of ester in the loquat wine, improves the flavor and accelerating the ageing progress of the loquat wine. The method provided by the invention is high in technology implantation performance and simple and convenient in industrialized operation, shortens the ageing period of the loquat wine and improves mouthfeel, color and fragrance.
Owner:FUJIAN AGRI & FORESTRY UNIV
Method, device and system for storing abnormal memory data of systems and terminal equipment
ActiveCN107463459AAchieve preservationAvoid failureFault responseDouble data rateSynchronous dynamic random-access memory
The invention discloses a method, device and system for storing abnormal memory data of systems and terminal equipment. The method comprises the following steps of: detecting whether a counting value of a watchdog timer exceeds a preset value or not; if the counting value exceeds the preset value, controlling, by utilizing a micro processing unit MCU in a system CPU, a double data rate synchronous dynamic random access memory DDR to store memory data in the DDR by adoption of a self-refreshing manner; when the DDR completes internal data storage, controlling an application processor in the system CPU to enter a system program operation state; and after the application processor enters the system program operation state, storing memory data in the DDR into a preset storage medium. According to the method, the storage of internal data can be realized through internal program operation in the system when the system is abnormal, an instruction sent to the system by external equipment is not needed, and problems can be found according to the internal data when the system is abnormal, so that the implementation is relatively strong and the problem solution efficiency is improved.
Owner:HISENSE VISUAL TECH CO LTD
Reliability monitoring system of power transmission line applied to smart grid
ActiveCN109188148AImprove reliabilityReduce workloadElectrical testingForeign matterMonitoring system
The invention provides a reliability monitoring system of a power transmission line applied to a smart grid. The system comprises: a collection module arranged onsite and used for collecting image information of the monitored power transmission line and transmitting a collected power transmission line image to a monitoring center in real time; and the monitoring center used for receiving the powertransmission line image sent by the collection module, performing analysis processing on the image information to extract a contour of the power transmission line in the power transmission line imageand all foreign matter contours near the power transmission line, comparing the contour of the power transmission line and all foreign matter contours with a pre-stored power transmission line contour template and an electrical component contour template to judge whether a foreign matter exists around the power transmission line, and sending early warning information when discovering the foreignmatter. The reliability monitoring system provided by the invention analyzes the reliability of the power transmission line according to the image information of the power transmission line, so that the intelligence level is high, the operation is simple, no manual participation is required, the implementation property is high, no influence is generated by external factors such as weather, the workload of the operation and maintenance personnel is reduced, and the accuracy is high.
Owner:国网安徽省电力有限公司铜陵市义安区供电公司
Excess sludge reduction bioreactor with variable aeration and worm attachment oblique plate
ActiveCN101786717AImprove work performanceImplement reduction processingSustainable biological treatmentBiological water/sewage treatmentOxygen utilization rateSludge
The invention discloses an excess sludge reduction bioreactor with variable aeration and a worm attachment oblique plate, which relates to a bioreactor for excess sludge reduction. The bioreactor solves the problems that that the conventional excess sludge reduction device has low oxygen utilization rate, poor aeration adjustment, easy worm drop, low growth density of worm colony, difficult discharge of inert substances and the like. An automatic gas flow adjustor which is well arranged can automatically adjust the air flow entering a plurality of variable micropore aeration pipes according to the dissolved oxygen concentration of sludge mixed solution in a container, thereby realizing variable aeration for the sludge mixed solution in the container; the dissolved oxygen concentration of the sludge mixed solution can be kept at the maximum dissolved oxygen concentration of the worm sludge reduction through the variable aeration; and a plurality of variable aperture vent holes are uniformly distributed on the variable micropore aeration pipes, and the variable range of the diameters of the vent holes is 0.2 to 0.8 millimeter. The excess sludge reduction bioreactor integrates the worm attachment oblique plate and the variable aeration so as to greatly improve the sludge reduction effect, and the sludge reduction reaches over 90 percent.
Owner:HARBIN INST OF TECH
Production method for jade type macadam polymerization plate
ActiveCN102029640AGuaranteed composite strengthGuaranteed compactnessCeramic shaping apparatusSurface layerChipseal
The invention relates to the field of a construction material, namely artificial synthetic stone, in particular to a production method of a jade type macadam polymerization plate. The conversion and utilization of the jade type macadam are improved, and the steps are as follows: 1. surface layer processing steps: a. preparing a surface layer material; b. configuring a surface layer; c. filling a gap, and forming a jade type macadam surface layer; 2. substrate preparation steps: d. preparing materials; e. distributing materials, and forming substrate bed of materials; or directly distributing materials with a mixture for filling the gap, and forming the substrate bed of materials; or selecting and placing a glass plate or an aluminum-made perforated plate on the surface layer of the jade type macadam directly; 3. composite molding step; and 4.finished product processing. The invention has the advantages that the technical process is reasonable, a way of changing wastes into valuables for the jade type macadam is provided, the appreciation performance of the jade type macadam and the recreational performance of the mineral grain is utilized effectively and is beneficial to the technology upgrading of synthetic engineered stone into a recreational type product, and compared with the prior composite board, the jade type macadam polymerization plate has a wider practicability; and the polymerization plate has good wear resistance and better artistry, and the current price on market is low.
Owner:STATE GRID CORP OF CHINA +1
Angle hoop tie reinforcement system of traditional stone masonry house and construction technology
Owner:ZHENGZHOU UNIV
Method for reconstituting sea surface temperature remote sensing dataset in same latitude
InactiveCN103400022AReduce initial value estimation errorImprove reconstruction accuracyImage analysisSpecial data processing applicationsSensing dataMissing data
The invention discloses a method for reconstituting a sea surface temperature remote sensing dataset in the same latitude. The method comprises the following steps that first, the spatial position of the dataset is matched with grids in size; second, a same latitude dataset is extracted and processed; third, the DINEOF method for reconstituting the same latitude SST sensing data is implemented. The method for reconstituting the sea surface temperature remote sensing dataset in the same latitude can achieve the reconstitution of the missing data of sea temperature sensing products, based on the fact that the variation of temperature distribution on a latitude line is smaller than longitude variation, initial value estimation errors of the missing data are lowered, and a practical operation method for improving the reconstitution precision is achieved.
Owner:HANGZHOU NORMAL UNIVERSITY
Broadband cholesteric liquid crystal device based on chiral ion monomers and manufacturing process thereof
ActiveCN104090444ASimple processReduce the possibilityNon-linear opticsLiquid-crystal displayPolymer network
The invention discloses a broadband cholesteric liquid crystal device based on chiral ion monomers and a manufacturing process of the broadband cholesteric liquid crystal device. The broadband cholesteric liquid crystal device is composed of two transparent substrate layers and a single-layer liquid crystal layer clamped between the two transparent substrate layers, wherein the liquid crystal layer is made from cholesteric liquid crystals with a stable polymer network. According to the broadband cholesteric liquid crystal device based on the chiral ion monomers and the manufacturing process of the broadband cholesteric liquid crystal device, the process is simple, the probability that display defects occur is reduced, practicability is high, a refection area of the broadband cholesteric liquid crystal device is wide, and the reflection effect is stable.
Owner:HEFEI UNIV OF TECH
Power supply reliability evaluation method and system
The invention discloses a power supply reliability evaluation method and system. The influences of a power distribution network grid structure on reliability indexes are classified into three categories, namely, links, connections, and mutual influences. Existing reliability evaluation algorithms cannot perform quantitative analysis on the influences on the reliability indexes from the three aspects. The evaluation method of the present invention includes steps of matrix construction, model establishment and index calculation. The matrix construction aims to generate a topology matrix of a power distribution network grid structure; according to the model establishment, a calculation model of the reliability indexes is built through using the topology matrix; and according to an index calculation unit, the calculation model of the reliability indexes is adopted to calculate the reliability indexes, and the influences of the links, connections, and mutual influences on the reliability indexes are expressed in a quantified manner. With the method and system of the invention adopted, the quantitative indexes of power distribution network user reliability analysis and system reliabilityanalysis are realized, and the influences of the links, connections, and mutual influences on the reliability indexes are reflected.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER COMPANY ECONOMIC TECHN INST +4
Freight trajectory data-based vehicle spontaneous formation mode mining method
PendingCN111340415AStrong implementationStrong application valueDatabase updatingGeographical information databasesTruckTransport engineering
The invention discloses a freight trajectory data-based vehicle spontaneous formation mode mining method, and the method comprises the steps: completing the freight spontaneous formation mode search based on a data mining method according to the daily massive freight trajectory data; providing a full-process processing framework innovatively; setting seven databases, using an improved running distance estimation method, a map matching method, a P-OPTICS algorithm and the like to complete tasks of estimating the freight travel of each truck on that day, truck travel positioning point map matching and coordinate repairing, hotspot line and excavation time period planning, truck formation set excavation at each moment, truck spontaneous formation mode excavation and evaluation under a specified line and a specified time period and the like. Therefore, key information such as the running distance is extracted from massive freight trajectory data, and meanwhile, a freight car spontaneous formation mode mining task in a specified road section or time period is completed, so that business reference is provided for freight car formation driving work under an automatic driving background in the future while formation mode characteristics are analyzed.
Owner:BEIHANG UNIV
Mechanical arm posture robustness control method based on interference estimator
ActiveCN107505841AMeet the transientSatisfy Steady State PerformanceAdaptive controlInterference resistanceDynamic models
The invention discloses a mechanical arm posture robustness control method based on an interference estimator. The mechanical arm robustness control method comprises steps of establishing a mechanical arm dynamic model and performing feedback linearity on the mechanic arm dynamic model to simplify the dynamic model into a disturbed double integration model, setting a double-component posture robustness controller in order to realize mechanical arm posture robustness tracking control, and converting a compensated control signal to a voltage signal to input into an actuator so as to complete posture robustness control of the mechanical arm under a disturbed condition. The double-component posture controller comprises two parts. One part is used for configuring an input of a nominal system in order to guarantee that a closed loop system can track reference signals and the other part is used for configuring an interference estimator for performing real-time estimation on model uncertainty and external disturbance and then performing compensation on a control signal. The mechanical arm robustness control method based on the interference estimator can effectively remove or inhibit uncertainty or an interference signal in a kinematic model in order to realize high accuracy tracking on a mechanical arm posture expectation reference signal, and is strong in interference resistance, clear in controlling parameters, less in calculation and strong in implementation.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Y-shaped titanium diffused lithium niobate phase modulator and optical fiber current transformer
PendingCN106950413APlay a splitting rolePlay the role of bundleVoltage/current isolationBeam splittingInstrument transformer
The invention relates to a Y-shaped titanium diffused lithium niobate phase modulator and an optical fiber current transformer. The Y-shaped titanium diffused lithium niobate phase modulator comprises lithium niobate crystals, a Y-shaped optical waveguide element, a first bar-shaped optical waveguide element, a second bar-shaped optical waveguide element and an electrode element. The Y-shaped optical waveguide element, the first bar-shaped optical waveguide element and the second bar-shaped optical waveguide element are arranged on the lithium niobate crystals by using the titanium diffusion technology. The first bar-shaped optical waveguide element is connected with one beam splitting end of the Y-shaped optical waveguide element. The second bar-shaped optical waveguide element is connected with another beam splitting end of the Y-shaped optical waveguide element. The electrode element comprises a first ground electrode and a first modulation electrode which are arranged on the first bar-shaped optical waveguide element and a second ground electrode and a second modulation electrode which are arranged on the second bar-shaped optical waveguide element. The degree of integration can be enhanced, the cost can be saved and the process difficulty can be reduced so that the standard of double requirements can be met in the actual application of the FOCT product, and popularization and application of the optical fiber current transformer are facilitated.
Owner:马鞍山万兆科技有限公司
Instrument eccentricity correction method in horizontal well acoustic cement bond logging
The invention relates to a method for correcting eccentricity influences of an acoustic cement bond logging instrument during horizontal well cementing quality evaluation in an oilfield development process. The method includes: utilizing acoustic amplitude differences of eight sectors caused by eccentricity in sector cement bond logging for computing eccentric distance in a bushing; utilizing relation of the eccentric distance and a 3ft acoustic amplitude for correcting the 3ft acoustic amplitude in an eccentric state to an amplitude in an instrument intermediate state; and recomputing a cement bond index for evaluating cementing quality. The method is capable of improving accuracy of horizontal well cementing quality evaluation, provides accurate technical data for perforation and fracturing, and meets requirements of horizontal well development.
Owner:PETROCHINA CO LTD +1
Sensing participation system and task distribution method of sensing participation system
ActiveCN103514048AStrong implementationGuaranteed energy savingResource allocationTask completionDistribution method
The invention provides a sensing participation system and a task distribution method of the sensing participation system, and discloses an online sensing task distribution system and method. Once a task arrives, the sensing participation system immediately distributes the new task to a member device with the shortest total distributed-task completion time at present for completion to enable the difference of the maximum value and the minimum value of the total work time of member devices to be smallest. The deployable performance and the implementation performance are higher. The sensing participation system and the task distribution method of the sensing participation system are suitable for deploying and running of large-scale sensing participation systems.
Owner:SHANGHAI JIAO TONG UNIV
UV (ultraviolet) solidified bonding magnet and preparation method thereof
ActiveCN102969116AStrong magnetismImprove mechanical propertiesPermanent magnetsInorganic material magnetismStearic acidFerrite (magnet)
The invention belongs to the technical field of permanent magnetic materials, and particularly relates to a UV (ultraviolet) solidified bonding magnet. The UV solidified bonding magnet comprises the following raw materials according to a mass ratio: 90-98.5 percent and one of bonding NdFeB magnetic powder, Sr ferrite magnetic powder or Ba ferrite magnetic powder; 1-8 percent of UV solidified resin mixture; 0.1-1 percent of coupling agent; and 0.05-0.4 percent of stearate lubricant. The invention further provides a preparation method of the UV solidified bonding magnet. According to the preparation method, the problems of lowering magnet property due to a high temperature, oxidization, heat demagnetization and the like in a traditional solidification method are solved, and the preparation method has the advantages of fast solidification speed, little pollution, energy-saving and the like.
Owner:HENGDIAN GRP DMEGC MAGNETICS CO LTD
Real-time strain measurement apparatus for stamping and forming and test method thereof
The invention, which belongs to the dynamic strain measurement technology field, relates to a real-time strain measurement apparatus for stamping and forming and a test method thereof. The real-time strain measurement apparatus comprises a static strain indicator, leads, foil gauges and a die. The foil gauges are fixed on test points and are connected with the static strain indicator through leads; besides, the die comprises a punch die and a female die; and a groove that is used for placing the foil gauges is arranged at positions of the female die, wherein the positions are corresponded to the test points. When real-time strain measurement on stamping and forming is carried out, different deformation portions of a workpiece and portions having different strain characteristics are utilized as test points of a sheet metal; the foil gauges are pasted; the foil gauges of the apparatus and the connecting leads are placed in the groove; the connecting leads are led out by the groove; and on the basis of utilization of a step-by-step stamping method, a real-time stress strain value is measured and obtained. According to the invention, the structure of the apparatus is simple and reasonable; it only needs to improve a die, so costs are low; and the apparatus has strong practicability; besides, the test method is simple and rapid; and during the part stamping stroke, it is convenient to measure a strain value.
Owner:YANGZHOU UNIV
User individual business realizing system and method
InactiveCN1851737ASimple processDistribute quicklySpecial data processing applicationsPersonalizationUser - individual
Owner:HUAWEI TECH CO LTD
Vehicle multi-target tracking method based on radar vision fusion under severe environment roadside view angle
PendingCN112505684AImprove scene adaptabilityImprove anti-interference abilityRadio wave reradiation/reflectionMulti target trackingNetwork architecture
The invention discloses a vehicle multi-target tracking method based on radar visual fusion under a severe environment roadside visual angle, which integrates radar and a visual sensor, designs a calibration cost function combining a target distance and a radar scattering area, realizes radar visual data level fusion processing, improves the dimension and reliability of perception information, andimproves the reliability of the perception information. By introducing a data enhancement and anti-interference encoder decoder structure, a target detection network architecture with high anti-interference capability is designed, and the identification capability of a target tracking system in a severe environment is improved; and finally, different tracking strategies are given to the space targets in different states by calculating the similarity between the target position and the target distance, thereby realizing the dynamic accurate tracking process of the static recognition target. Bymeans of fusion enhancement processing of the data and the model, the scheme has high reliability and accuracy, and the position and speed information of the vehicle target can be continuously and accurately acquired in scenes such as backlight and nighttime.
Owner:SOUTHEAST UNIV
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