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44results about How to "Rich application" patented technology
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Light emission display arrangements
InactiveCN1501329AA wide range of operationsAvoid the phenomenon of breaking through and evading feesTicket-issuing apparatusDetection of traffic movementPersonalizationEngineering
Owner:冯鲁民
Photographing control method and terminal
InactiveCN106341593ARealize automatic controlRich applicationTelevision system detailsColor television detailsAutomatic controlComputer graphics (images)
The embodiment of the invention provides a photographing control method comprising the steps that the length of a selfie stick is detected through a photoelectric displacement sensor or laser distance sensor arranged in the stick body of the selfie stick; the target distance between a photographing object and a terminal is determined according to the length of the selfie stick; and the terminal is controlled to adjust imaging parameters according to the target distance. Besides, the embodiment of the invention also provides the terminal. According to the photographing control method and the terminal, automatic control of the imaging parameters of the terminal can be realized according to the length of the selfie stick.
Owner:SHENZHEN GIONEE COMM EQUIP
Method for improving user experience in virtual application environment and virtual application system
InactiveCN104038535AImprove experienceReduce echo delayProgram loading/initiatingTransmissionVirtualizationClient-side
The invention discloses a method for improving user experience in a virtual application environment and a virtual system. The method is applied to a virtual application system including a client and a server side. The method comprises the following steps: sending an operation instruction produced by transferring the local resource of the client to the server side by the client through a virtual channel between the client and the server side; transferring a virtual resource control manager of the server side through the virtualized application program of the server side according to the operation instruction; transforming the operation instruction into a local resource request instruction of the client through the virtual resource control manager, and sending the operational instruction to the client through the virtual channel; transferring the local resource through the local resource control manager of the client according to the local resource request instruction of the client, and then returning the transferring result to the server side. According to the technical scheme, the method brings a user the convenience of using in the virtual environment, and the operation experience close to the local application program can be obtained under the virtual application environment.
Owner:BEIJING CHNFUTURE INFORMATION TECH
Intelligent household television, intelligent household television system and intelligent household television system control method
InactiveCN103648004AIncrease added valuePowerfulNon-electrical signal transmission systemsData switching by path configurationTelevision systemRemote control
The invention relates to an intelligent household television, an intelligent household television system and an intelligent household television system control method. The intelligent household television comprises an intelligent television body, and an RF wireless communication module mounted in the intelligent television body, a remote control terminal, controlled household electrical appliance controllers and a wireless sensor module, wherein the RF wireless communication module and a processor of the intelligent television body are in dual-phase connection, the remote control terminal and an uplink communication signal end of the RF wireless communication module are in dual-phase connection, an downlink communication signal end of the RF wireless communication module is in dual-phase connection with the controlled household electrical appliance controllers and the wireless sensor module, and the controlled household electrical appliance controllers of the intelligent household television can be one type or multiple types of illumination, curtain, air-conditioning, light modulation and fan controllers. An intelligent household system and an intelligent television are combined, an Android operation system and a hardware platform of the intelligent television are utilized, and all intelligent household functions of a traditional intelligent household system can be realized.
Owner:CHANGZHOU DESHI NEW TECH DEV
Helical gear time-varying mesh stiffness calculating method based on finite element analysis
ActiveCN107763173APerfect mechanical propertiesRich applicationGeometric CADPortable liftingElement modelElement analysis
The invention discloses a helical gear time-varying mesh stiffness calculating method based on finite element analysis, and belongs to the field of gear transmission system dynamics optimization design. How to calculate the helical gear time-varying mesh stiffness in a high precision and high efficiency mode in the prior art is the problem needing to be solved. According to the helical gear time-varying mesh stiffness calculating method, elastic deformation is analyzed by building a finite element model, gear single-tooth mesh stiffness is calculated through an ISO method, and accordingly, helical gear mesh stiffness is obtained; the helical angle value range and the gear width value range are not limited, the high-precision helical gear time-varying mesh stiffness can be calculated, and the reference is provided for gear dynamics theory and application perfecting, gear vibration reduced, noise reduction, gear modification and other aspects.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Method for achieving transformer substation video monitoring system on basis of ONVIF protocol
The invention discloses a method for achieving a transformer substation video monitoring system on basis of an ONVIF protocol. The method relates to an IP camera, a network switch, a video processing unit, a storage server, an administration client and a monitoring client, wherein the pan-tilt control signal input end, the OSD configuration signal input end and the equipment configuration control signal input end of the IP camera are connected with the pan-tilt control signal output end, the OSD configuration signal output end and the equipment configuration control signal output end of the video processing unit respectively. The ONVIF protocol is extended in the transformer substation video monitor station end system. OSD configuration provides the function that the clients can control and configure screen information of the IP camera, and according to the function, various types of OSD configuration parameters such as characters, data and time can be displayed on a screen. A shielding and detecting function can analyze whether a picture is shielded, and an ONVIF analysis module expression language can be used for describing configuration information of a shielding engine module, judging whether a detected area is shielded and determining whether a video shielding phenomenon occurs.
Owner:INFORMATION & TELECOMM COMPANY SICHUAN ELECTRIC POWER
Parameter control method of fill-in light, terminal and selfie stick
InactiveCN106303277ARich applicationImprove experienceTelevision system detailsColor television detailsLaser rangingAutomatic control
Embodiments of the invention provide a parameter control method of a fill-in light. The method comprises the following steps of detecting the length of the selfie stick through a photoelectric displacement sensor or a laser distance measuring sensor arranged in a stick body of the selfie stick; determining an object distance between a shooting object and the terminal according to the length of the selfie stick; and controlling the fill-in light to adjust light filling parameters according to the object distance. In addition, the embodiments of the invention also provide a terminal and a selfie stick which apply the parameter control method. According to the parameter control method of the fill-in light, automatic control of the light filling parameters can be realized according to the length of the selfie stick.
Owner:SHENZHEN GIONEE COMM EQUIP
Method for interacting dispatch intelligent command DICP system and patrol robot system
ActiveCN109510314AAchieve interactionRich applicationCircuit arrangementsInformation technology support systemRobotic systemsPrimary station
The invention discloses a method for interacting a dispatch intelligent command DICP system and a patrol robot system. The dispatch intelligent command DICP system comprises a DICP main station terminal and a DICP transformer substation terminal. The patrol robot system is deployed on a transformer substation side. A ticket taking unit is provided. The transformer substation side is provided witha network access unit. The method specifically includes: step S1, when the DICP main station imitating a ticket, the ticket taking unit acquiring ticket imitating information and transmitting the information to the DICP transformer substation terminal at the same time; step S2, the DICP transformer substation terminal further transmitting the ticket imitating information to a robot monitoring background through the network access unit; step S3, the robot monitoring background searching for ticket imitating interval ledger according to the ticket imitating information, corresponding to robot point location information, and assigning a task to a robot; step S4, the robot executing the task. The technical scheme can realize interaction of a dispatch intelligent command DICP system and a patrol robot system, and improve completion efficiency of power dispatching service.
Owner:广州邦讯信息系统有限公司
Metamaterial with dielectric substrate with nonuniform thickness
ActiveCN102637959ARich applicationSimple process designAntennasLensDielectric substrateProcess design
The invention provides a metamaterial with a dielectric substrate with nonuniform thickness, which comprises a multilayer dielectric substrate and multiple artificial microstructures, wherein the multiple artificial microstructures are arranged on the dielectric substrate; and the metamaterial is characterized in that the thickness of the dielectric substrate is distributed nonuniformly. The metamaterial disclosed by the invention has the advantages that through designing the thickness of the dielectric substrate into a nonuniformly-distributed mode, the metamaterial has more abundant function applications; and as a concrete implementation mode of the metamaterial disclosed by the invention, the convergence, divergence and deflection effects of the metamaterial on electromagnetic waves can be achieved through the nonuniform distribution of the thickness, so that the metamaterial is simpler in process design and lower in production cost.
Owner:KUANG CHI INST OF ADVANCED TECH
North direction interface data dynamic comparison supplement system
InactiveCN101247262ARich applicationData switching networksSpecial data processing applicationsData synchronizationData simulation
The present invention relates to a structure improvement of dynamic comparison supplement system for north interface data. North interface data dynamic comparison supplement system of mobile communication network tube includes: data acquisition comparison, deletion analyzing module, data keywords matching module, data interface agreement expansion module, simulating original alarm format module and data re-fill management module; data keywords matching module connects with data acquisition comparison, deletion analyze module, data interface agreement expansion module and simulate original alarm format module respectively, the data re-fill module connects with data interface agreement expansion module and digital simulation generating original alarm format module respectively. The present invention perfect practical application of network structure model such as TMN, ETOM, NGOSS etc, data synchronous function between modules, corresponding remark measures against data missing.
Owner:中国移动通信集团湖北分公司
Solar cooling system
The invention relates to a solar cooling system in the technical field of solar utilization. According to the solar cooling system, high-pressure gas generated in a solar thermal collector enters a jet pump from a power fluid inlet of the jet pump, so that low-pressure gas in a thermal absorber is sucked into the jet pump. Gas pressure in the heat absorber is lowered so that liquid in the heat absorber can be evaporated, heat can be absorbed and cooling can be carried out. The solar cooling system can utilize low-focus-degree or non-focus low-grade solar energy to carry out cooling, and therefore the application of the solar energy is enriched.
Owner:ZEROQ SCI & TECH
Method and apparatus for triggering concealed program by communication terminal
InactiveCN101494692ARich applicationSubstation equipmentWireless communicationEngineeringProcedure device
The embodiment of the invention relates to a communication terminal triggering concealed procedure method in field of communications technology, including: determining that the communications terminal satisfies the concealed procedure triggering conditions; sending the triggering conditions; triggering the concealed procedure based on the triggering conditions. The embodiment of the invention also relates to a communication terminal triggering concealed procedure device. The embodiment of the invention achieves that the communication terminal can detect and trigger concealed procedure, brings surprises for communication terminal users, and enriches application of the communication terminal.
Owner:HUAWEI DEVICE (SHENZHEN) CO LTD
Preparation method of lignocellulose three-component bi-crosslinking gel, the gel and application
ActiveCN113136053AHigh strengthSolve the problem that the solid content is difficult to increaseSolventHemicellulose
The invention discloses a preparation method of lignocellulose three-component bi-crosslinking gel, the gel and application; the preparation method comprises the following steps: preparing a nanocellulose dispersion liquid by using a cellulose raw material, and respectively dissolving hemicellulose and lignin in corresponding solvents to respectively obtain a hemicellulose solution and a lignin solution; uniformly mixing the raw materials to obtain lignocellulose dispersion liquid containing three components, namely nanocellulose, hemicellulose and lignin; then feeding the three-component lignocellulose dispersion liquid to a double-steam-bath closed environment with double functions of physical crosslinking and chemical crosslinking for reaction so as to produce the lignocellulose three-component double-crosslinking gel. The method has the beneficial effects that the solid content of the gel can be effectively improved to prepare the high-strength gel, the operation is simple, industrialization is easy to realize; the obtained gel has good mechanical properties and biocompatibility and can be widely applied to the fields of catalytic adsorption, biological medicines, sensors and the like.
Owner:NANJING FORESTRY UNIV
Drinking water system with automatic water adding function and safety control method thereof
The invention relates to a drinking water system with an automatic water adding function and a safety control method thereof. A water inlet pipeline and a drainage pipe are connected to one side of an unboiled water barrel, a heating pipeline and a condensation pipe are connected between the unboiled water barrel and a hot water barrel, and a plurality of sections of first water level switches and second water level switches for detecting the water level are arranged inside the unboiled water barrel and the hot water barrel, so that the heating pipeline is controlled to add boiled water into the hot water barrel automatically. When the second water level switches fail efficacy, the condensation pipe leads overflowing boiled water into the unboiled water barrel, for the reason that the first water level switches are provided with multiple security mechanisms such as a dry burning-resistant mechanism and a full water level emergency outage mechanism, when the first water level switches also fail efficacy, water in the unboiled water barrel can be led out by the drainage pipe due to overflowing, and accordingly the safety drinking water system with a non-pressure non-vapor service environment can be created. According to the invention, boiled water can be automatically added, the multiple security mechanisms such as the dry burning-resistant mechanism and the full water level emergency outage mechanism are achieved, and therefore the explosive danger of the drinking water system is avoided.
Owner:MAXTEC PLASTICS INC
Method for preparing medium substrate with heterogeneous dielectric constant and meta material
The invention provides a method for preparing a medium substrate with heterogeneous dielectric constants and a meta material; the method allows random and flexible design of the dielectric constants of the medium substrate as a whole, and thus provides the meta material with more abundant functional applications. Through the flexible design of the dielectric constants, impedance matching of the artificial microstructure in the meta material is realized, and the method also has the advantages of reducing microwave dielectric loss of the medium substrate.
Owner:KUANG CHI INST OF ADVANCED TECH +1
Anti-dazzling structure, anti-dazzling rearview mirror and vehicle
ActiveCN106427792AReduce light intensityTo achieve the purpose of anti-glareOptical viewingOptoelectronicsField of view
The invention provides an anti-dazzling structure, an anti-dazzling rearview mirror and a vehicle. The anti-dazzling structure comprises a first light-transmitting substrate, a second substrate for reflecting light transmitted from the first substrate, multiple micro capsules and a control mechanism capable of controlling the motion direction of the multiple micro capsules, wherein the second substrate and the first substrate are arranged oppositely and form a cavity, and the multiple micro capsules are arranged in the cavity, can move in the cavity and have a first state and a second state. In the first state, the micro capsules move in the direction in which an edge zone of the first substrate and an edge zone of the second substrate are located under the control of the control mechanism and are gathered in the edge zone of the first substrate and the edge zone of the second substrate. In the second state, at least partial micro capsules move to a middle zone of the first substrate and a middle zone of the second substrate under the control of the control mechanism. The anti-dazzling structure can provide multiple functional applications, has wide display purpose and does not affect a running view field.
Owner:BOE TECH GRP CO LTD +1
A GPU server and an expansion system thereof
InactiveCN108984452AAvoid redundancyFlexible collocationElectric digital data processingCollocationOn board
The invention discloses an expansion system, comprising: a first board card provided with an expansion chip; and a second board provided with a control module. So, in practice, the scheme according tothe invention is adopted as follows: a control module is independently designed on the second board, the second board card and the first board card are detachably connected, and according to different application scenarios, the second board card with the control module can be flexibly selected to be added to the expansion system, so that resources are reasonably utilized, redundancy of the control module is avoided, cost is reduced, flexible collocation and assembly mode are adopted, and the form and application of the product are enriched. The invention also discloses a GPU server, which hasthe beneficial effects.
Owner:ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
Intelligent wearing device, and operation method and apparatus of intelligent wearing device
InactiveCN106020357AControl vibrationRich applicationCryptography processingPayment architectureEmbedded systemFunction application
Owner:BOE TECH GRP CO LTD +1
Power quality wireless monitoring system and monitoring method thereof
ActiveCN103138399BImprove stabilityRich applicationTransmission systemsCircuit arrangementsThird generationNetworked system
Owner:国网浙江绍兴市上虞区供电有限公司 +1
Ancestral fermentation type cereal fish bait, method for preparing same and application of ancestral fermentation type cereal fish bait
ActiveCN105766841ARich applicationPromote digestion and absorptionOther angling devicesNutrientAnimal breeding
The invention relates to the field of fishing equipment for fishes and animal breeding feed, in particular to cereal fish bait.The cereal fish bait comprises, by weight,300-700 parts of soybean meal, 150-250 parts of barley flour, 200-400 parts of bran, 300-700 parts of rock candy, 80-120 parts of honey, 300-700 parts of fermented glutinous rice, 300-700 parts of hops and 1-5 parts of yeast powder.The invention further provides a method for preparing the cereal fish bait.The cereal fish bait and the method have the advantages that nutrient substances in the fish bait and aroma of the fish bait can be effectively stimulated by the aid of the method in fermentation procedures, accordingly, problems of poor fish luring capacity and palatability of existing cereal fish bait can be solved, and the cereal fish bait further can be used as a fish feed additive.
Owner:BEIJING YULETANG FISHING TACKLE CO LTD
Silver-loaded graphene/copper self-lubricating material and preparation method thereof
InactiveCN113512662AHigh hardnessLow conductivityMaterial nanotechnologyCarbon compoundsPhysical chemistryDodecyl sulfate
The invention provides a silver-loaded graphene / copper self-lubricating material and a preparation method thereof. The method comprises the following steps: dispersing graphene nanosheets and sodium dodecyl sulfate in dimethylformamide, wherein the ratio of the graphene nanosheets to the sodium dodecyl sulfate to the dimethylformamide is (0.05-0.15) g: (0.05-0.15) g: (30-50) ml, and obtaining a dispersion liquid; uniformly dispersing an AgNO3 solution and the dispersion liquid to obtain a precursor solution, carrying out hydrothermal treatment on the precursor solution at 60-90 DEG C, then separating precipitates in the obtained mixed system, and then washing and drying the precipitates to obtain silver-loaded graphene; and uniformly mixing the silver-loaded graphene with copper powder, then carrying out sintering treatment in a vacuum hot-pressing sintering furnace at 700-800 DEG C, and then cooling the mixture along with the furnace to obtain the silver-loaded graphene / copper self-lubricating material.
Owner:SHAANXI UNIV OF SCI & TECH
Watch band, watch, and method and device for controlling air transaction based on NFC (near field communication)
InactiveCN106723717ARealize over-the-air rechargeRich applicationPayment architectureBraceletsElectricityElectromagnetic shielding
The invention relates to the technical field of wearable equipment, and discloses a watch band, a watch, and a method and a device for controlling air transaction based on NFC (near field communication), which aim at improving the cruising ability of a watch with an intelligent card function. The watch band comprises an insulation watch band body, a circuit board and an NFC antenna, wherein the circuit board and the NFC antenna are positioned in the watch band; a controller is arranged on the circuit board and is used for supporting a non-contact type intelligent card protocol; the NFC antenna is electrically connected with the controller. By adopting the scheme, the watch band has the advantages that the circuit board and the NFC antenna are arranged in the insulation watch band body, the electromagnetic shielding to the NFC antenna by the insulation watch band body is avoided, the arrangement of active amplifying circuits is not needed, the watch band can work without power supply, and the cruising ability of the watch can be improved.
Owner:MEIZU TECH CO LTD
Power quality wireless monitoring system and monitoring method thereof
ActiveCN103138399AImprove stabilityRich applicationTransmission systemsCircuit arrangementsPower qualityElectric energy
The invention discloses a power quality wireless monitoring system and a monitoring method of the power quality wireless monitoring system. The power quality wireless monitoring system comprises a data network system, an intelligent heterogeneous system and a power quality system. The intelligent heterogeneous system is in signal connection with the data network system and the power quality system. The intelligent heterogeneous system comprises an implement layer, a decision layer and an intelligent bank. The decision layer is in signal connection with the implement layer and the intelligent bank and in signal connection with the data network system and the power system. The implement layer is in signal connection with the data network system and the power quality system. The power quality wireless monitoring system and the monitoring method of the power quality wireless monitoring system solve the problems of data damage, data exception, system crash and the like of a wireless 3G system due to the factors that signals are not stable, a 3G router is broken down, a system functional module is crashed, operation of a database is abnormal, and hardwares of the system are damaged and the like. Stability based on a 3G power quality wireless monitoring system is greatly improved, and functional application based on the 3G power quality wireless monitoring system is enriched.
Owner:国网浙江绍兴市上虞区供电有限公司 +1
Multifunctional terminal of emergency communication system
InactiveCN106304006ARealize remote communicationDifficulties in realizing effective command and dispatchTransmission systemsClosed circuit television systemsSupply managementCommunications system
The invention relates to a multifunctional terminal of an emergency communication system, which comprises a power supply management module, a TD-LTF transmission module / off-network transmission module, a voice module, a video module, a heart rate / temperature collection module, a GPS collection module, and a display control module, whereinthe TD-LTF transmission module / off-network transmission module can guarantee that the terminal device communicates with the outside both in the environment of network and no network, and thus guarantees contact with rescuers and communication continuity; the voice module guarantees the communication real-timeness; the video module is used for uploading the accident scene condition to amonitor center, so that the monitor center conveniently transmits the order and commands the rescue; the heart rate / temperature collection module is used for collecting the heart rate and temperature of the rescuers and uploading to the monitor center, and the monitor center analyzes the vital sign information and rescues the rescuers in time; the GPS collection module guarantees the contact with the rescuers and the definition of the rescue geographical position; the display control module is used for performing displaying and operation control on other modules.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Control method of universal controller
InactiveCN105938345AGood flexibilityRich applicationProgramme controlTransmission systemsRemote computerThird party
The invention belongs to the technical field of a controller, and specifically relates to a control method of a universal controller. A third-party device is connected with the universal controller through an interface unit, state information of the third-party device itself and acquired data are transmitted to a control unit through the interface unit, the information and the data are transmitted to a radio frequency communication unit after being processed by the control unit, the radio frequency communication unit packages the state information of the third-party device and the acquired data into a communication data packet for sending to a gateway through a WSN network, and then the gateway transmits the information and the data to a remote computer or a remote mobile phone terminal through a wireless network. A command can also be given at the remote computer or the remote mobile phone terminal, the command reaches the gateway through the wireless network, the gateway transmits the command to the control unit through the WSN network from the radio frequency communication unit, after the control unit analyzes the command, and parameters in the command are transmitted to the third-party device through the interface unit for controlling the third-party device. The universal controller has the advantages of good flexibility, rich application, convenient control, convenient installation and the like.
Owner:西安元智系统技术有限责任公司
System-on-chip and intelligent wearable device
PendingCN111813737ANot restricted by layoutSave spaceEnergy efficient computingArchitecture with single central processing unitLow power dissipationEmbedded system
The invention discloses a system-on-chip and an intelligent wearable device. The system-on-chip comprises a power source management chip, an RAM, a main control subsystem, an auxiliary control subsystem and a plurality of function subsystems; the main control subsystem, the auxiliary control subsystem and the function subsystems each comprise an MCU; the main control subsystem, the auxiliary control subsystem and the function subsystems are connected with the RAM through a bus; the power source management chip is used for supplying power to the RAM, the main control subsystem, the auxiliary control subsystem and the plurality of functional subsystems. According to the system-on-chip and the intelligent wearable device of the invention, the power source management chip, the RAM, the main control subsystem, the auxiliary control subsystem and the plurality of functional subsystems are integrated into one system-on-chip; compared with the prior art that multiple chips are used for achieving the same function, the system-on-chip can reduce power consumption and cost and effectively reduce space needed by PCB layout, and therefore, providing a solution which is rich in function application, low in power consumption, not limited by PCB layout and low in cost for the intelligent wearable device.
Owner:SPREADTRUM COMM (SHANGHAI) CO LTD
Camera control method and terminal
InactiveCN106341593BRealize automatic controlRich applicationTelevision system detailsColor television detailsAutomatic controlEngineering
Owner:SHENZHEN GIONEE COMM EQUIP
Portable multifunctional signal measuring instrument for digital broadcasting television
ActiveCN103841414ASatisfy conveniencePowerful data analysis and processing capabilitiesTelevision systemsTransmission monitoringOperational systemMeasuring instrument
The invention discloses a portable multifunctional signal measuring instrument for a digital broadcasting television. Various broadcasting television system measurement methods are integrated, the data analysis processing capacity is strong, the functional application is rich, and the requirement for convenience of outdoor work can be satisfied through low cost. The portable multifunctional signal measuring instrument for the digital broadcasting television comprises a smallest system module, a DVB signal input and demodulation module, a system power module, a man-machine interaction module, a CA card communication module and a network communication module, wherein the smallest system module is used for operating an Android operation system and comprises a CPU, an internal storage chip, an NAND FLASH and a hardware encryption IC, and the internal storage chip, the NAND FLASH and the hardware encryption IC are respectively connected with the CPU. The DVB signal input and demodulation module, the system power module, the man-machine interaction module, the CA card communication module and the network communication module are connected with the smallest system module, and the internal storage chip is a DDR3 chip or a DDR5 chip.
Owner:ZHUHAI GOTECH INTELLIGENT TECH
Method for testing shift performance of automatic transmission mechanism of manual transmission vehicle
InactiveCN108051228AHigh detection reliabilityRich applicationVehicle testingVertical motionManual transmission
The invention relates to a method for testing the shift performance of the automatic transmission mechanism of a manual transmission vehicle. The method comprises the following steps of obtaining theshift performance level of the automatic transmission mechanism of the manual transmission vehicle by comprehensively analyzing and evaluating the horizontal shifting information of a shift lever andthe vertical motion information of the shift lever during the shifting. The method is simple and applicable, has high detection reliability and can be universally used.
Owner:宁波贝尔达汽车控制系统有限公司
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