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High-speed axisymmetric aircraft composite control method
InactiveCN103913991AAvoid Control Coupling ProblemsReduce consumptionSimulator controlControl orientedRudder
The invention discloses a high-speed axisymmetric aircraft composite control method. The high-speed axisymmetric aircraft composite control method is used for solving the technical problem of poor stability in an existing interceptor missile direct force and aerodynamic force composite control method. According to the technical scheme, a varying centroid and pneumatic rudder composite control are adopted, based on defining a varying centroid control mode, an instruct allocation strategy under a composite control scheme is formulated; a dynamical model for control is established through force analysis of a high-speed aircraft; an overall scheme of a varying centroid mechanism is further determined; then ballistic characteristic points are taken to finish design of a control system. According to the high-speed axisymmetric aircraft composite control method, the varying centroid mechanism is introduced, so that the technical problem of poor stability of a background technology control method is effectively avoided, larger control torque is obtained while energy consumption is reduced as much as possible, and reentry flight of the high-speed aircraft for a long time in a large airspace is facilitated; a composite mode with the pneumatic rudder is adopted, so that work pattern of a sliding block executing mechanism is simplified, and system stability is improved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Double-foot driving piezoelectric linear motor and electric excitation mode
InactiveCN103427704AImprove efficiencyIncrease thrustPiezoelectric/electrostriction/magnetostriction machinesElectricitySignal on
The invention discloses a double-foot driving piezoelectric linear motor and an electric excitation mode. The motor is composed of two stator sets, a rotor / linear guide rail, a pre-pressing guide rail, a pre-pressing spring and a base. The two stator sets are distributed symmetrically along axes, and the ends of the two stator sets are fixedly connected with the pre-pressing guide rail. Under the action of elastic restoring force generated by elastic deformation of the pre-pressing spring, the two stator sets keep in contact with the rotor / linear guide rail, so that an outage self-locking function is provided for the piezoelectric linear motor. Each of the two stator sets is composed of piezoelectric actuation units, flexible connectors and a driving foot, wherein two ends of the piezoelectric actuation units are connected with the driving feet and the base through the flexible connectors. The piezoelectric actuation units serve as modular structures, so that the whole motor structure is simple, the motor assembly efficiency is improved, and batch production is facilitated. According to the double-foot driving piezoelectric linear motor and the electric excitation mode, the rotor / linear guide rail can be driven by the two stator sets alternately to perform rectilinear motion by imposing specific excitation voltage signals on laminated piezoelectric ceramic sets in the piezoelectric actuation units.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Estimation method for high-canopy-density forest stand volume based on photographic image pair of unmanned aerial vehicle
InactiveCN105241423AImprove work efficiencyImprove working precisionPicture interpretationAviationEstimation methods
The invention discloses an estimation method for a high-canopy-density forest stand volume based on a photographic image pair of an unmanned aerial vehicle. According to the invention, a small lithium-battery unmanned aerial vehicle is used as a flight control platform and carries an ordinary non-metric fixed-focus digital camera, so a photogrammetric measurement system is composed. According to different textural feature information of tree crowns, aerial photographs are automatically judged, read, analyzed and interpreted by combined usage of a computer vision technology and an image recognition technology; therefore, stand description factors like average tree height h, average diameter D, tree density N, canopy degree K1, mingling degree K2, age class A and locality class S are obtained, and the forest stand volume M is calculated via a model.
Owner:翼航东升东莞航空实业集团有限公司
Symmetrical double-feet driving offresonance piezoelectric linear motor
InactiveCN105071686AEnsure consistencyImprove contact statusPiezoelectric/electrostriction/magnetostriction machinesEngineeringLinear motor
The invention discloses a symmetrical double-feet driving offresonance piezoelectric linear motor, comprising a stator, a casing of the stator, a mover guide rail, guiding adjusting mechanisms, a precompression apparatus and a base. The stator is fixedly connected in the casing to form an integrity; the front end of the casing is provided with the mover guide rail, the rear end is in connection with the precompression apparatus, and left and right ends are respectively in connection with the guiding adjusting mechanisms; the precompression apparatus is internally provided with a precompression spring; under the restoring force effect generated by the deformation of the precompression spring, the front end of the casing keeps contact with the mover guide rail; the mover guide rail, the precompression apparatus, and the guiding adjusting mechanisms are all arranged on the base; the stator is composed of a stator supporting board, and two symmetrical driving feet, lamination electroceramics, cushion blocks, long hinges, and pre-tightening screws. The symmetrical motor has a structure simple, is convenient to install, and effectively guarantees the bidirectional actuation performance consistency of a piezoelectric motor; certain electric signals are respectively applied to four sets of lamination electroceramics to realize the bidirectional rectilinear motion of the piezoelectric motor.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Threshold adaptation energy detection method
InactiveCN102324992AImprove the level of intelligenceImprove adaptabilityTransmission monitoringData transmissionSignal-to-noise ratio (imaging)
The invention discloses a threshold adaptation energy detection method. In the energy detection method, a parameter computing scheme for an offline energy judgment threshold decision function and an online energy judgment threshold judgment scheme are sequentially realized. In the threshold adaptation energy detection method provided by the invention, the energy judgment threshold decision function is offline established, a value of an energy judgment threshold is dynamically regulated according to different signal to noise ratios, and online judgment is performed, so the intellectualization level of a cognitive radio user is improved, false alarm probability Pf(xi) is decreased to maximize the average data transmission rate of a secondary user (SU), energy overhead required in a running process is decreased, and an average value of false dismissal probability Pm(xi) is limited within a preset probability threshold range to avoid excessive interference in a primary user (PU).
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
Method and system for opening door by scanning code, smart cabinet and terminal
ActiveCN108734884AReduce inputImprove experienceApparatus for meter-controlled dispensingIndividual entry/exit registersBarcodeComputer terminal
The invention provides a method and system for opening a door by scanning a code, a smart cabinet and a terminal. The method for opening the door by scanning the code is used for the smart cabinet andcomprises the steps of S102, detecting the type of the two-dimensional code or the barcode scanned by a scanner and a cabinet number corresponding to the code; S104, judging whether or not the two-dimensional code or the barcode belongs to item storage codes in type, and if yes, executing S106; S106, sending out a door opening signal to open the cabinet door corresponding to the cabinet number, and executing S108; S108, judging whether or not the cabinet door is opened, if yes, executing S110, and if not, executing S112; S110, uploading item storage information to a server so that the servercan push the item storage information to the user terminal; S112, uploading fault information to the server, redistributing the cabinet door, and executing S108. By means of the method for opening thedoor by scanning the code, the scanner is applied to multiple links, and the hardware utilization efficiency and the user experience are improved.
Owner:PEKING UNIV FOUNDER GRP CO LTD +1
Image acquisition system
InactiveCN103297665AReduce power consumptionReduce volumeTelevision system detailsCharacter and pattern recognitionComputer hardwareBarcode
The invention discloses an image acquisition system which adopts a micro electro mechanical system (MEMS) technology, and provides an alternate image acquisition method and a working mode for preassigning a lens shifting position. By means of the method, the quality of images collected by the image acquisition system can be better, the image collecting speed is not affected, and therefore the work efficiency of an image acquisition device is higher. The image acquisition system comprises a movable lens set, a fixed lens set and an image sensor chip, wherein the movable lens set, the fixed lens set and the image sensor chip are arranged in sequence. The image sensor chip is in communication with a processor. The processor is used for collecting and processing image data from an image sensor, and for barcode decoding or character recognition. The processor drives an MEMS chip connected with the movable lens set through an MEMS chip driving circuit. The movable lens set moves in the axial direction so as to form a focusing position varying system or a focal length optical system with the fixed lens set.
Owner:庄佑华
Mobile terminal achieving short distance wireless pairing by using touch screen
InactiveCN103780762AThe working mode is simple and easy to understandEasy data transferConnection managementSubstation equipmentData transmissionTouch panel
The invention discloses a mobile terminal achieving short distance wireless pairing by using a touch screen, and relates to the field of communication. The mobile terminal comprises a touch panel, a CPU controller and a radio frequency transceiver; the signal input end of the radio frequency transceiver is connected with the touch panel; the CPU controller is connected with the driving end of the radio frequency transceiver and used for driving the radio frequency transceiver to transmit and receive radio frequency signals, and the radio frequency transceiver radiates the signals through the touch panel; the CPU controller is connected with the signal output end of the touch panel. According to the mobile terminal, when the touch panel is in an antenna transmitting state and a sensor network is used for sensing contact with other mobile devices, the radio frequency transceiver is used for receiving the radio frequency signals, connection is built by receiving an identification address, a wifi or Bluetooth mode is started up, data transmission is conducted, the working mode is simple, easy to understand and particularly suitable for users who are not familiar with digital products, and the purpose of conveniently and rapidly conducting data transmission between the mobile devices is achieved.
Owner:NINGBO SAGEREAL COMM
Mobile phone wireless charging system with Bluetooth function controlled by APP
PendingCN107069894ASimple working modeReduce setup costsCircuit authenticationMobile unit charging stationsThe InternetElectronic switch
The invention relates to a mobile phone wireless charging system with a Bluetooth function controlled by APP. The mobile phone wireless charging system comprises a wireless transmitter, a wireless receiver and a mobile phone, wherein the wireless transmitter consists of a DC filtering circuit, a transmitting control circuit, a transmitting coil assembly, a Bluetooth module circuit, an electronic switching circuit and a switch filtering circuit; the wireless receiver consists of a receiving coil assembly, a receiving control circuit and a filtering output circuit; the mobile phone comprises charging control management software which is formed by an APP charging special application program and a mobile phone internal Bluetooth functional program. When the mobile phone wireless charging system is in use, the wireless transmitter is arranged in a public place in a mobile phone public charging facility form; the wireless receiver is placed in a mobile phone back shell; the mobile phone downloads and installs the APP charging special application program from the internet; the APP charging special application program controls a mobile phone blue band and the Bluetooth in the wireless transmitter to perform data communication to control mobile phone charging; a user scans a two-dimensional code on the wireless charging transmitter by the mobile phone and then pays to control charging automatically; and the mobile phone wireless charging system is simple in structure, creative in working pattern and quite high in practicability.
Owner:驿网无际(上海)信息科技有限公司
Four-single-body direct balancing device and method of series energy storage body
ActiveCN106532802AImplement direct deliverySolve the problem of peer-to-peer direct equalizationCharge equalisation circuitElectric powerEnergy transferCoupling
The invention provides a four-single-body direct balancing device and method of a series energy storage body, relates to a series energy storage group balancing circuit, and aims at solving the problems that an existing balancing device cannot solve the problem of point-to-point direct energy transfer between any two energy storage single bodies, the energy balancing path is long and the energy balancing efficiency is low. The series energy storage body is formed by connecting four energy storage single bodies in series, wherein each two energy storage single bodies are taken as one group; the four-single-body direct balancing device comprises four coupling inductors and six two-way switches; direct energy transfer between any single bodies can be achieved through controlling the two-way switches; a Buck-Boost working mode is adopted during energy balancing within groups; and a flyback working mode is adopted during energy balancing between groups. According to the four-single-body direct balancing device and method of the series energy storage body, the implementation mode is simple, the energy transfer path in the balancing process is short, the balancing speed is relatively high and the balancing efficiency is relatively high.
Owner:HARBIN INST OF TECH
Auxiliary device and method for improving stability and safety of lithium metal battery based on external ultrasonic field
ActiveCN112086701ARealize multiple angles of incidenceIncrease the incident areaSecondary cells charging/dischargingBattery chargeLithium metal
The invention discloses an auxiliary device for improving the stability and the safety of a lithium metal battery based on an external ultrasonic field. The device comprises a battery charging box, abattery charging and discharging management system, a controller, an ultrasonic excitation signal transmitter and an ultrasonic transduction device. The battery charging box is of a closed box body structure. The battery charging box is filled with cooling liquid and is provided with a notch groove for accommodating a lithium metal battery; the battery charging and discharging management system isused for being connected with the lithium metal battery in the notch groove; the controller is connected with the ultrasonic transduction device through the ultrasonic excitation signal emitter, andthe ultrasonic transduction device is used for applying ultrasonic longitudinal waves to a plurality of outer surfaces of the lithium metal battery when the lithium metal battery is charged. The diffusion rate of the lithium ions in the electrolyte is improved by using an ultrasonic means, so that the purpose of assisting in improving the stability and safety of the lithium metal battery is achieved. Different from the current traditional improvement strategy, the device is simple in working mode, low in cost, high in practicability and obvious in improvement effect.
Owner:无锡领声科技有限公司
Secondary side parallel LCD forward converter capable of avoiding reverse charging of energy storage capacitor
ActiveCN111682777AImprove efficiencyImprove job stabilityEfficient power electronics conversionDc-dc conversionCapacitanceHemt circuits
The invention discloses a secondary side parallel LCD forward converter capable of avoiding the reverse charging of an energy storage capacitor. The forward converter comprises a forward converter main circuit and an energy transfer and transmission circuit; the forward converter main circuit comprises a high-frequency transformer T, a switching tube S, a diode D1, a diode D2, an inductor L1 and acapacitor C1, and the energy transfer and transmission circuit comprises a diode D3, a capacitor C2, an inductor L2 and a diode D4. The forward converter is simple in circuit structure and high in reliability, the diode D4 ensures that C2 cannot be reversely charged, reactive power loss of the converter is reduced, the reverse recovery problem of the D4 can be eliminated, diode loss is reduced, excitation energy can be transferred to a load side, forward excitation energy can be transmitted, energy transmission efficiency is improved, and the circuit is suitable for high-power transmission.
Owner:XIAN UNIV OF SCI & TECH
Forward converter for realizing forward and reverse energy transmission by connecting LCD in parallel at secondary side
ActiveCN111682750AIncrease profitImprove efficiencyEfficient power electronics conversionDc-dc conversionCapacitanceTelecommunications
The invention discloses a forward converter for realizing forward and reverse energy transmission by connecting an LCD in parallel at a secondary side. The forward converter comprises a forward converter main circuit and an energy transfer and transmission circuit; the forward converter main circuit comprises a high-frequency transformer T, a switching tube S, a diode D1, a diode D2, an inductor L1 and a capacitor C1; and the energy transfer and transmission circuit comprises a diode D3, a capacitor C2 and an inductor L2. The forward converter is simple in structure and high in reliability, excitation energy is transferred to a load side, forward energy can be transmitted, the energy transmission efficiency is improved, soft turn-off of a switching tube can be realized, the problem of reverse recovery of diodes D1 and D2 is eliminated, the loss of the switching tube and the diodes is further reduced, and the overall efficiency is improved.
Owner:XIAN MORDA CORE ELECTRONICS TECHNOLOGY CO LTD
A method for estimating the stock volume of high canopy density forest stands based on drone photography
InactiveCN105241423BImprove work efficiencyImprove working precisionPicture interpretationAviationEstimation methods
Owner:翼航东升东莞航空实业集团有限公司
Full-automatic cleaning machine for vacuum moisture regain turnover box
PendingCN113145595AHighlight substantive featuresSignificant progressHollow article cleaningProcess engineeringCleaning station
The invention provides a full-automatic cleaning machine for a vacuum moisture regain turnover box. The full-automatic cleaning machine comprises a three-station transferring platform, a negative-pressure purging system and a cleaning system; the three-station transferring platform comprises a receiving station, a sweeping station and a cleaning station which are arranged in sequence, and the three-station transferring platform is driven by a transverse transferring module to switch positions on the three stations; the negative-pressure purging system is arranged above the cleaning station; the cleaning system is arranged above the cleaning station; and a peripheral enclosure assembly comprises an annular track and three faces of enclosures, a water retaining lifting door is arranged between the sweeping station and the cleaning station, and the peripheral high-temperature and high-pressure water spray head set walks on the annular track through a power device and is vertically arranged. The full-automatic cleaning machine for the vacuum moisture regain turnover box has the advantages of being high in cleaning efficiency, high in cleaning degree, free of manual participation and high in automation degree.
Owner:郑州世峰节能科技有限公司
DC/DC converter circuit topological structure
InactiveCN111211683ASimple structureReduce lossApparatus without intermediate ac conversionHemt circuitsEngineering
The invention discloses a DC / DC converter circuit topological structure. On the basis of different working modes of a coupling inductor in the working process of the topological structure, the charging and discharging of a bootstrap capacitor and the leakage inductance energy recycling of a converter, the high-voltage gain of the converter is achieved, meanwhile, the loss of the converter is reduced, and the efficiency of the converter is improved. In addition, the topological structure of the invention is simple in circuit structure, adopts a small number of used components, has a single working mode, is low in device voltage stress and is suitable for a boost converter system between the output side of a fuel cell and standard direct-current bus voltage.
Owner:CSSC SYST ENG RES INST
Information recommendation method and device, medium and electronic equipment
PendingCN110147887AEasy to analyze resultsShorten the timeKnowledge based modelsData analysis systemIndex term
The invention relates to the technical field of intelligent decision, and discloses an information recommendation method and device, a medium and electronic equipment. The method comprises the steps of obtaining a first keyword table which is configured for each data analysis model in a data analysis system and stores a first keyword; obtaining descriptive statements about analysis requirements ofthe decision-making subject on the decision-making object; performing word segmentation processing on the descriptive statement to obtain a second keyword table in which a second keyword is stored; and determining matching scores of the first keywords and the second keywords corresponding to the data analysis models based on the second keywords in the second keyword table, and recommending the data analysis models according to the matching scores. According to the method, the data analysis model is matched according to the descriptive statement of the analysis requirement of the decision-making subject for the decision-making object, the time for manually selecting the model can be shortened, and the working efficiency is improved. And the matching precision can be improved, so that the analysis result of the decision-making object is optimized.
Owner:PING AN TECH (SHENZHEN) CO LTD
The real-time control system and control method for the ion source in gas
ActiveCN1996546BSimple working modeSteady state uniform densityIon beam tubesPlasma techniqueReal-time Control SystemEngineering
Owner:武汉中科光谷绿色生物技术有限公司
Auxiliary device and method for improving stability and safety of lithium metal batteries based on external ultrasonic field
ActiveCN112086701BRealize multiple angles of incidenceIncrease the incident areaSecondary cells charging/dischargingBattery chargeLithium metal
Owner:无锡领声科技有限公司
Photoelectric searching and tracking device based on avalanche diode imaging device
PendingCN114035199ASimple structureReduce weightTelevision system detailsColor television detailsPhotodetectionAvalanche diode
The invention relates to the technical field of photoelectric detection, and in relates particular to a photoelectric searching and tracking device based on an avalanche diode imaging device. The device comprises a photoelectric turret (1) and a display control processing module (2); the photoelectric turret (1) adopts an avalanche diode imaging device and is used for searching or tracking a target under the control of the display control processing module (2) and sending an acquired video image and target position information to the display control processing module (2); and the display control processing module (2) is used for controlling the photoelectric turret (1) to switch between a search mode and a tracking mode, and processing and displaying the video image and the target position information acquired by the photoelectric turret (1). The searching and tracking device is simple in structure and light in weight, image motion compensation generated in the scanning direction and the platform motion can be achieved at the same time, the working mode is simplified, and the requirement for the anti-vibration capacity of the platform is lowered.
Owner:中国人民解放军91977部队 +1
An environmental electromagnetic field energy harvesting device and its preparation method
ActiveCN112583296BRealize integrationReduce manufacturing costFriction generatorsHemt circuitsEngineering physics
The embodiment of the present invention relates to an environmental electromagnetic field energy harvesting device and its preparation method. The micro-nano power supply system includes: a receiving electrode prepared on the same substrate, a bridge rectifier circuit, and a first test electrode and a second test electrode. electrode; the first output end of the receiving electrode is electrically connected to the first AC input end of the bridge rectifier circuit through a conductive circuit; the second AC input end of the bridge rectifier circuit is vacant; the bridge rectifier circuit The first DC output end of the circuit is electrically connected to the first test electrode through a conductive circuit; the second DC output end of the bridge rectifier circuit is electrically connected to the second test electrode through a conductive circuit.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
A Symmetrical Biped Drive Non-resonant Piezoelectric Linear Motor
InactiveCN105071686BNot easy to interfereLarge output displacementPiezoelectric/electrostriction/magnetostriction machinesLinear motionElectricity
The invention discloses a non-resonant piezoelectric linear motor driven by symmetrical bipeds, which comprises a stator and its casing, a mover guide rail, a guide adjustment mechanism, a pre-pressure device and a base; the stator is fixedly connected in the casing to form a whole , the front end of the shell is provided with a mover guide rail, the rear end is connected to the pressure device, and the left and right ends are respectively connected to the guide adjustment mechanism; the pressure device is equipped with a pre-compressed spring, and the shell is under the action of the restoring force generated by the deformation of the pre-compressed spring. The mover guide rails keep in contact; the mover guide rails, pre-pressure device and guide adjustment mechanism are all installed on the base; the stator structure consists of a stator support plate and two symmetrically distributed driving feet, laminated piezoelectric ceramics, pads, and long hinges , Composed of pre-tightening screws. The symmetrical motor has a simple structure and is easy to install, effectively ensuring the consistency of bidirectional actuation performance of the piezoelectric motor. Applying certain electrical signals to the four groups of laminated piezoelectric ceramics respectively can realize the bidirectional linear motion of the piezoelectric motor.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Combined media operating system
InactiveCN102142002BQuick control operation abilitySimple working modeSpecial data processing applicationsMedia controlsOperational system
The invention relates to a combined media operating system which comprises a servo host and a combined media module, wherein the combined media module is connected with the servo host to obtain a connectable media server form stored by the servo host; network data are displayed through a first interface; the connectable media server form is played through a second interface by utilizing a media play module; a user can select a media channel from the connectable media server form to play relevant media data; and the first interface and the second interface are controlled by an interface control module to switch an interface picture on the display module of the combined media module. When the interface control module switches interfaces, and the switching operation is displayed by the display module; moreover, the media play module continuously plays the media data, and a media control unit is used for controlling the play action of the media data which are played at present.
Owner:UNIPATTERN
Nitrogen and oxygen detection sensor chip
PendingCN114527181ASimplified three-loop working modeSimple structureInternal combustion piston enginesMaterial electrochemical variablesPhysicsCapacitance
The invention discloses a nitrogen and oxygen detection sensor chip. The sensor chip is formed by laminating four layers of substrates, the four layers of substrates sequentially comprise a first layer of substrate, a second layer of substrate, a third layer of substrate and a fourth layer of substrate from bottom to top, and the four layers of substrates are all made of zirconium oxide; a snakelike heating electrode is printed on the surface of the first-layer substrate; an insulating layer covering the heating electrode is printed at the bottom of the second-layer substrate, and a capacitance electrode (+) is printed at a top test end; the third-layer substrate sequentially comprises a first diffusion barrier, a first cavity, a second diffusion barrier and a second cavity; a capacitance electrode (-) is printed at a position, corresponding to the first cavity, of the bottom of the fourth-layer substrate, and a test electrode (-) is printed at a position, corresponding to the second cavity, of the bottom of the fourth-layer substrate; a test electrode (+) is printed on the top of the fourth layer of substrate, and the top of the test electrode (+) is covered with a porous protective layer. According to the invention, the structure of the nitrogen-oxygen detection sensor chip is simplified, the test loop is optimized, and the use of noble metal Au is avoided.
Owner:有研科技集团有限公司
Wireless relay device and implementation method thereof
PendingCN113014299ALow Latency FeaturesLow anti-interferenceRadio transmissionHigh level techniquesMulti bandTransceiver
The invention provides a method for realizing a pilot frequency wireless relay. A downlink processing unit and a monitoring unit are arranged in a relay device, and the method comprises the following steps: enabling the downlink processing unit to receive a first radio frequency signal RF1 from a base station (CAP) and convert the first radio frequency signal RF1 into an intermediate frequency signal; converting the intermediate frequency signal into a second radio frequency signal RF2, and transmitting the second radio frequency signal RF2 to a user terminal (STA); enabling the monitoring unit to receive a fifth radio frequency signal RF5 from a base station (CAP) and convert the RF5 signal into an intermediate frequency signal; processing and analyzing the intermediate frequency signal to obtain a working frequency and a signal bandwidth required by the relay; and setting a second radio frequency signal RF2 according to the working frequency and the signal bandwidth indication. By adopting the wireless relay method and device provided by the invention, the working frequency band can be changed, namely the same-frequency and different-frequency relay operation is supported, the time delay characteristic is low, the anti-interference performance is realized, the working mode is simple, and a certain multi-frequency-band mesh function is realized. A transmitting channel and a receiving channel in the invention are not realized by adopting conventional LNA and PA, but a radio frequency transceiver is added, so that flexible choices are provided for the relay device to work at the same frequency or different frequencies with a base station.
Owner:NUFRONT MOBILE COMM TECH
Scanning code to open the door method, scanning code to open the door system, smart cabinet and terminal
ActiveCN108734884BReduce stepsEasy to operateApparatus for meter-controlled dispensingIndividual entry/exit registersComputer hardwareBarcode
The invention provides a method and system for opening a door by scanning a code, a smart cabinet and a terminal. The method for opening the door by scanning the code is used for the smart cabinet andcomprises the steps of S102, detecting the type of the two-dimensional code or the barcode scanned by a scanner and a cabinet number corresponding to the code; S104, judging whether or not the two-dimensional code or the barcode belongs to item storage codes in type, and if yes, executing S106; S106, sending out a door opening signal to open the cabinet door corresponding to the cabinet number, and executing S108; S108, judging whether or not the cabinet door is opened, if yes, executing S110, and if not, executing S112; S110, uploading item storage information to a server so that the servercan push the item storage information to the user terminal; S112, uploading fault information to the server, redistributing the cabinet door, and executing S108. By means of the method for opening thedoor by scanning the code, the scanner is applied to multiple links, and the hardware utilization efficiency and the user experience are improved.
Owner:PEKING UNIV FOUNDER GRP CO LTD +1
Piezoelectric Linear Motor Driven by Bipeds and Electric Excitation Method
InactiveCN103427704BImprove efficiencyIncrease thrustPiezoelectric/electrostriction/magnetostriction machinesElectric machineSignal on
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Airborne navigation nacelle
ActiveCN102501979BHigh precision outputReal-time outputAircraft componentsInstruments for comonautical navigationGyroscopeAccelerometer
The invention relates to an airborne navigation nacelle which is used for providing enemy destination parameters to a main control room and comprises an inner ring platform, an outer ring frame and a base, wherein, the inner ring platform is hinged with the outer ring frame through a rotating shaft; the outer ring frame is hinged with the base through a hinge shaft; the base is fixed at the bottom of an airplane; a visible light television imaging system and a laser rangefinder are arranged inside the inner ring platform; the inner ring platform comprises a two-degree-of-freedom gyroscope, accelerometers, an imaging device, the laser rangefinder and a double-channel rotary transforming angle transducer; in addition, the outer ring frame comprises the double-channel rotary transforming angle transducer; a micromachining gyroscope is arranged on the base in the ordinate axis direction of an unmanned plane, measures the three-axis attitude of a carrier, and offsets the correlative navigation errors. Air speedometers are arranged in the ordinate axis direction and the pitch axis direction of the unmanned plane; an altimeter is arranged at the bottom of the base so as to measure the height of the unmanned plane; and the accelerometers are arranged at the two ends of the base so as to achieve levelling when in initial alignment. The airborne navigation nacelle can integrally detect, search and track a target, and has the advantages of high system reliability and low cost.
Owner:HEBEI HANGUANG HEAVY IND
A dual-machine coordinated automatic access system for disc-type materials
The invention relates to a disc material double-machine collaboration automatic storage system. The system comprises a base; a horizontal guide rail is arranged on the base; and shelves are arranged on the base on two sides of the horizontal guide rail. The system is characterized in that the horizontal guide rail is longitudinally provided with an automatic feeder and a storage roadway machine in sequence; and the automatic feeder and the storage roadway machine both can move in the longitudinal direction of the horizontal guide rail. An electric control cabinet is arranged on the base; and the automatic feeder and the storage roadway machine are both connected with the electric control cabinet through wire or wireless signal transmission. A conveying belt is arranged on the base on one side of the horizontal guide rail; and the longitudinal center line of the conveying belt is parallel to the horizontal guide rail. The automatic storage system integrates a feeding device with a storage device, uses one electric control cabinet for collaborative control to full-automatically perform the warehousing operation of disc materials in sequence, is simple and fast in mode, nearly needs no manual operation, and can realize smooth gapless butt joint with a production line.
Owner:苏州派迅智能科技有限公司
Threshold adaptation energy detection method
InactiveCN102324992BImprove the level of intelligenceImprove adaptabilityTransmission monitoringSignal-to-noise ratio (imaging)Signal-to-quantization-noise ratio
The invention discloses a threshold adaptation energy detection method. In the energy detection method, a parameter computing scheme for an offline energy judgment threshold decision function and an online energy judgment threshold judgment scheme are sequentially realized. In the threshold adaptation energy detection method provided by the invention, the energy judgment threshold decision function is offline established, a value of an energy judgment threshold is dynamically regulated according to different signal to noise ratios, and online judgment is performed, so the intellectualization level of a cognitive radio user is improved, false alarm probability Pf(xi) is decreased to maximize the average data transmission rate of a secondary user (SU), energy overhead required in a running process is decreased, and an average value of false dismissal probability Pm(xi) is limited within a preset probability threshold range to avoid excessive interference in a primary user (PU).
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
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