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67results about How to "Expand the range of selection" patented technology
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Fracturing transmission and high-pressure discharging system
InactiveCN104727797AExpand the range of selectionSave layout spaceFluid removalTransfer caseEngineering
The invention relates to a fracturing transmission and high-pressure discharging system. The fracturing transmission and high-pressure discharging system comprises a chassis and is characterized in that a high-power engine, a transfer case, a plurality of variable displacement plunger pumps and a double-acting fracturing pump are arranged on the chassis, the output end of the high-power engine is connected with the input end of the transfer case, the output end of the transfer case comprises a plurality of power take-off ports, and each power take-off port is connected with one variable displacement plunger pump; the variable displacement plunger pumps drive the double-acting fracturing pump through a hydraulic system. The fracturing transmission and high-pressure discharging system further comprises a system radiator and a heat dissipation plunger pump used for driving the system radiator, and the heat dissipation plunger pump is connected with one power take-off port of the transfer case. The power take-off ports of the transfer case and the variable displacement plunger pumps are arranged annularly. The fracturing transmission and high-pressure discharging system has the advantages that hydraulic driving replaces mechanical transmission, and working vibration is reduced; the layout space of a whole vehicle is saved, and meanwhile, operating efficiency and the stability of the whole vehicle are improved.
Owner:YANTAI JEREH PETROLEUM EQUIP & TECH CO LTD
Servo drive device and servo control system
ActiveCN103176450AExpand the range of selectionIncrease selection flexibilityTotal factory controlProgramme total factory controlControl theoryRotary encoder
The invention discloses a servo drive device and a servo control system. The servo drive device includes a power module, a processing module and a coding interface module. The output ends of the power module are respectively connected with each power input end of the processing module and the coding interface module to provide power supply for the processing module and the coding interface module. The coding interface module comprises at least a first position feedback interface unit, a second position feedback interface unit and a power supply interface unit. The output ends of the first position feedback interface unit and the second position feedback interface unit are connected with the processing module, and correspondingly used for acquiring code data of an incremental encoder and an absolute-type encoder and delivering the code data to the processing module after corresponding processing of the code data. The input end of the power supple interface unit is connected with the output end of the power module, and provides working voltage for an external encoder connected with the first position feedback interface unit or the second position feedback interface unit selectively according to configuration parameters. The servo drive device and the servo control system can be compatible with multiple types of encoders including photoelectric rotary encoders with the same or different working voltages.
Owner:BEIJING A&E TECH
A/B shaft used for ultrasound scanning and examination of complex shape/contour
InactiveCN102507749AMeet the test requirementsImprove detection accuracyMaterial analysis using sonic/ultrasonic/infrasonic wavesLinear motionEngineering
The invention relates to an ultrasound A / B shaft detection device used for a complex structure, which can realize five-axle linkage of an ultrasound detection device and is used for ultrasound detection of various complex surfaces. The conventional three-axle linear motion can not satisfy the requirement that a central axis of a sensor is vertical to the surface of a to-be-detected material when the detection is carried out. Through the A / B shaft device, the rotation at any angle can be realized, as a result, the requirement is satisfied and the accuracy and the reliability of the detection are improved. The A / B shaft provided by the invention is particularly suitable for detecting the complex surfaces, such as inclined surfaces, canal surfaces and grooves.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Passive type dynamic leveling control system of hydraulic machine and control method thereof
ActiveCN106696341AImprove reliabilityMeet the precision requirementsPressesHydraulic cylinderControl system
The invention relates to a passive type dynamic levelling control system of a hydraulic machine. The system comprises a controller, a constant-pressure oil source P1, a high-pressure oil source P2, an oil tank, a first displacement sensor, a second displacement sensor, a third displacement sensor, a fourth displacement sensor, a first dynamic levelling hydraulic sub-system S1, a second dynamic levelling hydraulic sub-system S2, a third dynamic levelling hydraulic sub-system S3, and a fourth dynamic levelling hydraulic sub-system S4, wherein each of the first, the second, the third and the fourth dynamic levelling hydraulic sub-systems is composed of a first check valve, a first, a second and a third electromagnetic ball valves, and a first, a second and a third levelling overflow valves; the oil inlets of the first, the second and the third electromagnetic ball valves are communicated with each other and connected with a rodless cavity of a first levelling hydraulic cylinder; the oil outlets of the first, the second and the third electromagnetic ball valves are respectively connected with the oil inlets of the first, the second and the third levelling overflow valves; and the oil outlets of the first, the second and the third leveling overflow valves are communicated with each other and connected back to the oil tank. The passive type dynamic levelling control system provided by the invention has the advantages that the antijamming capability is high and the stability is high.
Owner:FUZHOU UNIV
Solar photovoltaic tracking system angle position feedback module
ActiveCN102289232AHigh concentricityGuaranteed concentricityControl using feedbackCouplingEngineering
The invention discloses an angular position feedback module of a sun photovoltaic tracking system. The angular position feedback module is composed of a shell (1), a rotary encoder (2), a coded disc installation rack (3), a module base (4), a connecting rod (5), a limiting switch (6), a sliding block, a central shaft combination (8) and a flexible coupling (9). The shell (1) covers the module base (4), the rotary encoder (2), the coded disc installation rack (3), the limiting switch (6), the sliding block (7), the upper half part of the central shaft combination (8) and the flexible coupling (9) are sealed in a seal cavity consisting of the shell (1) and the module base (4). By integrating two functions of angular size feedback and extreme position alarming, the angular position feedback module provided by the invention has high integral protection level in comparison with the way of using independent components; meanwhile, the protection design for a sensor is added, a limiting angleis convenient for adjusting, the transport and installation are convenient; therefore, the angular position feedback is more stable and reliable.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Hydraulic control system and hydraulic control method
ActiveCN101922485AExpand the range of selectionImprove fretting performanceTelemotorsGearing controlHydraulic motorControl system
Owner:ZOOMLION HEAVY IND CO LTD
Servo system and reading device of position of output shaft
ActiveCN106289332AReduce the number of serial portsLow costConverting sensor output electrically/magneticallyMicrocomputerMicrocontroller
The present invention provides a reading device of the position of an output shaft and a servo system. The servo system comprises at least one output shaft, and each output shaft is provided with an absolute encoder; the reading device comprises: at least one cylinder number obtaining module consisting of at least one input end, wherein the inputting ends of the cylinder number obtaining modules is in one-to-one correspondence with the output shafts; each input end of the cylinder number obtaining module is connected with the output end of the absolute encoder on the corresponding output shafts; the servo system also comprises a single-chip microcomputer, after the single-chip microcomputer receives a reading instruction emitted by the master control device, the single-chip microcomputer controls the cylinder number obtaining module to obtain the cylinder number of the rotation of the output shaft required by the reading instruction and sends the obtained cylinder number to the master control device through a serial port. The servo system and the reading device of the position of the output shaft employ the reading device to read the absolute position of a plurality of output shafts so as to reduce the number serial ports of the master device, reduce the cost and enlarge the model selection range of the master control device in the servo system application.
Owner:BOE TECH GRP CO LTD
Antenna adjustment method and device and computer storage medium
ActiveCN110911804AReduce antenna efficiencyLow costSimultaneous aerial operationsAntenna supports/mountingsInterference (communication)Computer engineering
The embodiment of the invention discloses an antenna adjustment method and device and a computer storage medium, the method is applied to a mobile terminal at least comprising a first antenna and a second antenna, and network parameters of the mobile terminal in a communication process are acquired in real time; wherein the network parameters at least comprise a working frequency band of a first antenna and a working frequency band of a second antenna; a working scene of the mobile terminal is determined according to the network parameters; if the determined working scene is that the mobile terminal works in a frequency band concurrent mode, the antenna efficiency of the first antenna at a harmonic interference frequency point is reduced, wherein the harmonic interference frequency point is obtained according to the interference of the first antenna to the second antenna, and a frequency band concurrent mode exists between the working frequency band of the first antenna and the workingfrequency band of the second antenna; therefore, the problem of signal interference caused by a frequency band concurrent mode can be effectively solved, and meanwhile, the antenna performance is also improved.
Owner:ZTE CORP
Fracturing truck and drive conveying system thereof
InactiveCN103775302AReduce the number of commutationsExpand the range of selectionServomotorsFluid removalModel selectionTruck
The invention discloses a fracturing truck and a drive conveying system thereof. The drive conveying system of the fracturing truck comprises one or more engines, a plurality of oil pumps, a control valve set, a first conveying mechanism and a second conveying mechanism. The first conveying mechanism and the second conveying mechanism respectively comprise an oil cylinder and a pressure cylinder. A plug body is arranged at the extending end of a piston rod of each oil cylinder, and each plug body is movably arranged in the corresponding pressure cylinder. When the number of the engine is one, the engine is used for driving multiple oil pumps, and when the number of the engines is multiple, each engine is used for driving at least one oil pump. The control valve set is used for controlling the oil inlet and oil returning state of the oil cylinder in the first conveying mechanism and the oil cylinder in the second conveying mechanism. According to the fracturing trunk and the drive conveying system thereof, the output pressure and flow coverage range can be effectively increased, the model selection difficulty and the cost of related parts can be effectively lowered, meanwhile, the safety redundancy rate of the drive conveying system of the fracturing truck can be effectively improved, and the service life of a conveying mechanism can be prolonged.
Owner:SANY PETROLEUM INTELLIGENT EQUIP CO LTD
Preparation device and technology for producing high-quality liquid carbon dioxide
ActiveCN108821288AReduce dehydration energy consumptionReduce the temperatureCarbon compoundsProcess equipmentProcess engineering
The invention discloses a preparation device for producing high-quality liquid carbon dioxide. The preparation device comprises a drying system, a heavy component removing system, an impurity removingsystem and a light component removing system; a rotating wheel dehumidifying machine comprises a dehumidifying region and a regeneration region; a smoke cooler, a heater and the regeneration region are communicated through a regenerated gas pipeline; the dehumidifying region is communicated with a compressor through a raw gas pipeline; the compressor is communicated with the heater through the raw gas pipeline; the heavy component removing system comprises a heavy component removing tower, a heavy component removing circulating pump and a CO2 washing pump; a preparation technology comprises the following steps: (1) drying and dehydrating; (2) washing and removing a heavy component; (3) carrying out low-temperature deep impurity removal; (4) carrying out liquefaction and rectification. Thepreparation device and the preparation technology, disclosed by the invention, have the advantages of simple technology, low operation energy consumption and convenience for operation; under the condition that a few of sets of equipment need to be increased based on previous process equipment, and the liquid carbon dioxide with the content more than 99.995 percent can be stably produced; the generation of solid wastes is reduced and the investment cost is reduced.
Owner:杭州快凯高效节能新技术有限公司
Discharge circuit and discharge control method
ActiveCN106877467AAvoid heat buildupReliable dischargeBatteries circuit arrangementsSecondary cells charging/dischargingEngineeringDischarge rate
The invention relates to a discharge circuit and a discharge control method. The discharge control method comprises the following steps: judging whether discharge conditions are met, if yes, when each discharge period is started, acquiring the initial discharge voltage of the current discharge period, and judging whether the initial discharge voltage of the current discharge period is greater than preset voltage, if yes, generating a pulse signal of the current discharge period according to the initial discharge voltage of the current discharge period, wherein the generated pulse signal enables the discharge energy of a discharge resistor in effective pulse discharge time and the average power of the discharge resistor in the discharge periods to meet the derating requirement of the discharge resistor; outputting the pulse signal to a switch tube so as to control the on and off of the switch tube, and realizing the discharge function of the current discharge period. By implementing the technical scheme of the invention, the discharge time can be effectively shortened while reliable discharge of the discharge circuit of a direct-current charge module is guaranteed, and meanwhile the selection range of the discharge resistor is enlarged, so that the cost of the device is reduced.
Owner:XIAN TGOOD INTELLIGENT CHARGING TECH CO LTD
Sintering mixing granulation process and system
The invention relates to a sintering mixing granulation process, and belongs to the technical field of sintering. The process comprises the following steps: quantitatively obtaining return mine for sintering granulation, an iron raw material, a flux, fuel and steel mill waste; conveying the obtained iron raw material, flux, fuel and steel mill waste into a mixing machine, introducing a proper amount of water into the mixing machine, and uniformly stirring and mixing to obtain a premixed raw material; conveying the return mine and the obtained premixed raw material into a granulator, and adding a proper amount of water and steam into the granulator for mixing and granulating to obtain granules for sintering; and conveying the obtained granules into a sintering machine to be sintered to obtain a sintered material. The return mine is directly added into the granulator, so that the volume and the weight of the raw materials in the mixing machine are reduced, the mixing effect of the mixing machine is improved, the type selection range of the mixing machine is widened, meanwhile, the return mine is prevented from entering the mixing machine to damage the mixing machine, and the service life of a liner plate of the mixing machine is prolonged.
Owner:BEIJING SHOUGANG INT ENG TECH
Forklift positioning method, forklift and computer readable storage medium
PendingCN111638530AScan information richExpand the range of selectionImage enhancementImage analysisModel selectionRadar
The invention discloses a forklift positioning method, a forklift and a computer readable storage medium. The method comprises steps that left laser radar data and right laser radar data are acquiredrespectively; Scan Match processing is carried out on the left laser radar data and the right laser radar data to obtain state estimation between frames, and error estimation and variance of the stateestimation are obtained at the same time; state estimation of a wheel disc encoder odometer is obtained through the wheel disc encoder odometer; time synchronization of the obtained laser radar dataand the odometer data of a wheel disc encoder are carried out; and Kalman filtering on the data subjected to time synchronization is carried out to obtain optimal state estimation. The method is advantaged in that the pose and the state of a forklift can be estimated more accurately, navigation precision is improved, the obstacle avoidance function is realized, meanwhile, a model selection range of the two-dimensional laser radar can be increased, and cost is reduced.
Owner:广州蓝胖子移动科技有限公司
Deamination treatment system
PendingCN113880168AExpand the range of selectionReduce consumptionSpecific water treatment objectivesWater contaminantsReboilerProcess engineering
The invention relates to the field of wastewater treatment, and especially relates to a deamination treatment system. The system comprises a deamination tower, a tower kettle reboiler arranged at the downstream of the deamination tower, a steam compressor arranged at the downstream of the deamination tower, ammonia gas condensing equipment arranged at the downstream of the deamination tower, an ammonia gas absorption tower arranged at the downstream of the deamination tower, and an ammonia water intermediate tank arranged at the downstream of the ammonia gas absorption tower, wherein the deamination treatment system can be switched among a conventional process mode, a tower kettle flash evaporation mode and a tower top compression mode. When a tower kettle flash evaporation mode is used, the type selection range of the steam compressor can be expanded, the method has obvious advantages for projects with large treatment capacity, and the steam consumption is reduced by 63% compared with that of a conventional process mode; when a tower top compression mode is used, the energy utilization rate is the highest, and the steam consumption is reduced by 80% compared with that of a conventional process mode; and for the conventional process mode, the stability of the whole system can be ensured by embedding the system into the two energy-saving processes.
Owner:昆山三一环保科技有限公司
Method and system for solving communication interface data compatibility in replacement of old parts of instrument
PendingCN111274185AExpand the range of selectionRealize communicationElectric digital data processingModel selectionSoftware engineering
The invention relates to the field of instrument measurement and control, and discloses a method for solving data compatibility of a communication interface in replacement of an old component of an instrument, which comprises the following steps: S1) confirming bus interface types of a scientific instrument and a new component to be installed, and respectively connecting the scientific instrumentand the new component to be installed with a data adapter; s2) obtaining a communication protocol; s3) modifying data format adaptation software in the data analysis and forwarding software; s4) powering on the scientific instrument, the to-be-installed new part and the data adapter module and performing integration test; and S5) judging whether the communication between the scientific instrumentand the to-be-installed new component is normal or not. The invention provides a method for solving the data compatibility problem of the communication interface in replacement of old parts of the scientific instrument, the disadvantage caused by dependence on traditional hardware improvement is avoided, the data compatibility problem is solved by adding the data adapter between the scientific instrument and the parts, the universality is very high, and the model selection range of instrument accessories is enlarged.
Owner:INST OF GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
Intelligent integrated building terminal system
InactiveCN109709903AExpand the range of selectionEasy constructionProgramme total factory controlHuman–machine interfaceInformation resource
The invention provides an intelligent integrated building terminal system. The system includes a data acquisition module, a communication module, a human-machine interface module and an execution adjustment module, wherein the data acquisition module is used for collecting the environment inside a building and an operating state of a system actuator in real time, the communication module is used for transmitting data collected by the data acquisition module to management software of the terminal system and analyzing and processing the collected data, the human-machine interface module is usedfor collecting the data information, optimizing visualization of the data information and providing a control port and a related parameter input port for a user, and the execution adjustment module isused for receiving data analysis instructions of the terminal system and controlling and adjusting the system actuator. The system is advantaged in that data acquisition localization, network control, function integration and cost saving of each device can be realized, and information resource sharing and standardization are further improved.
Owner:易微电(天津)科技发展有限公司
Hoisting device for building blast furnaces
The invention discloses a hoisting device for building blast furnaces. The technical schemes of the invention comprise that: the hoisting device is provided with an annular hanging beam and a horizontal hanging beam; the annular hanging beam is arranged horizontally and the annular hanging beam is supported by platforms which are fixed to a shell of a blast furnace and contact with the circumference of the annular hanging beam; the horizontal hanging beam has an elongated strip shape and is arranged horizontally below the annular hanging beam, and a centre portion of the horizontal hanging beam has an articulated connection with a centre portion of the annular hanging beam through a center hinge axle; two end portions of the horizontal hanging beam are arranged on an annular track of the annular hanging beam through circling pulleys; and a trolley is arranged on a track of the horizontal hanging beam through a pulley of the horizontal hanging beam. The hoisting device can realize that materials are swung safely at different height levels. Compared with the prior arts, the hoisting device of the invention has the advantages that: manual workload is reduced greatly; a building construction period is shortened by nearly 50%; labor efficiency is improved; material damages are avoided during construction processes; economic benefit is improved; and type selecting scopes of furnace bottom materials and hearth materials are extended.
Owner:WUHU XINXING DUCTILE IRON PIPES
Control method for diesel locomotive cooling system
InactiveCN104595004AExpand the range of selectionCoolant flow controlMachines/enginesModel selectionDiesel locomotive
The invention relates to a control method for a diesel locomotive cooling system. The diesel water outlet temperature W in a cooling water loop and the diesel air inlet temperature A in a pressurized air loop are detected, and when the diesel water outlet temperature W=TWL or the air inlet temperature A=TAL, a fan is started; when the diesel water outlet temperature meets the formula TWL<=W<TWH, or the air inlet temperature A meets the formula TAL<=A<TAH, the fan rotating speed R meets the formula RL<=R<RH, and the fan rotating speed R is adjusted linearly relative to the water outlet temperature or the air inlet temperature; when the diesel water outlet temperature W>=TWH, or the air inlet temperature A>=TAH, the fan rotating speed R=RH. Under the condition that the diesel without an intercooler is adopted in a locomotive, the cooling system needs to cool high-temperature water of the diesel and cool pressurized air of the diesel, the control problem of cooling the high-temperature water of the diesel and the pressurized air of the diesel at the same time is solved well, and therefore the model selection range of the locomotive diesel is enlarged.
Owner:CRRC DALIAN CO LTD
Middle-high voltage series-connection electronic switch
ActiveCN102710244AReduce lossReduce power consumptionElectronic switchingCapacitanceElectronic switch
A middle-high voltage series-connection electronic switch comprises a main electronic power switch module, a basic dynamic voltage-sharing resistance-capacitance branch formed by a non-polarized capacitor (C1) and a resistor (R1) in series connection, an H bridge diode rectifying module, an attached dynamic voltage-sharing resistance-capacitance branch, a discharging resistor and a surge absorption module, wherein the input end of the H bridge diode rectifying module is connected with the basic dynamic voltage-sharing resistance-capacitance branch, the output end of the H bridge diode rectifying module is connected with the attached dynamic voltage-sharing resistance-capacitance branch, two ends of the attached dynamic voltage-sharing resistance-capacitance branch are further connected with a surge absorption module metal oxide varistor (MOV) in parallel, the attached dynamic voltage-sharing resistance-capacitance branch is formed by a capacitor (C2) and a current-limiting resistor (R2) in series connection mode, and two ends of the capacitor (C2) are further connected with the discharging resistor (Rp) in parallel. The middle-high voltage series-connection electronic switch enables a system to meet general dynamic voltage-sharing requirements and meet requirement for short-time voltage shock absorption under the condition of not adding resistance-capacitance branch power consumption, and is long in service life and high in self-adaption degree.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
Microbial bacteria fermentation bed pig raising method
InactiveCN114731983ASpray all overReduce sprayingBio-organic fraction processingAnimal housingBiotechnologyLactic acid bacterium
The invention relates to the technical field of microbial fermentation bed breeding, in particular to a microbial fermentation bed pig breeding method. The bottom of the fermentation bed body directly adopts a dug soil pit bottom as the bottom, and a hardened waterproof interlayer is arranged on the periphery of the bed body; the depth of a bed body of the fermentation bed is 500-800mm, the interior of the bed body is divided into three layers, the thickness of the bottom layer is 100-170mm, corn straws, sorghum straws and the like are rubbed and then directly laid, and no microbial inoculum is added; the thickness of the middle layer is 180-230 mm, and after rice husk and corn straw powder are laid, a lactic acid bacteria agent is sprayed according to the mass ratio of 9: 1; the thickness of the surface layer is 120-170mm, after rice husks are laid, an EM microbial agent is sprayed on the surfaces of the rice husks according to the mass ratio of 7: 1-7: 3, and then clear water is sprayed to enable the temperature of the surface layer to be kept at 38-42 DEG C. The purpose is to improve feed utilization rate and reduce pollution.
Owner:古交市幸汇美景玖旗农业科技发展有限公司
Servo drive device and servo control system
ActiveCN103176450BExpand the range of selectionIncrease selection flexibilityTotal factory controlProgramme total factory controlComputer moduleControl theory
Owner:BEIJING A&E TECH
A preparation device for producing high-quality liquid carbon dioxide and its preparation process
ActiveCN108821288BReduce dehydration energy consumptionReduce the temperatureCarbon compoundsProcess equipmentProcess engineering
The invention discloses a preparation device for producing high-quality liquid carbon dioxide. The preparation device comprises a drying system, a heavy component removing system, an impurity removingsystem and a light component removing system; a rotating wheel dehumidifying machine comprises a dehumidifying region and a regeneration region; a smoke cooler, a heater and the regeneration region are communicated through a regenerated gas pipeline; the dehumidifying region is communicated with a compressor through a raw gas pipeline; the compressor is communicated with the heater through the raw gas pipeline; the heavy component removing system comprises a heavy component removing tower, a heavy component removing circulating pump and a CO2 washing pump; a preparation technology comprises the following steps: (1) drying and dehydrating; (2) washing and removing a heavy component; (3) carrying out low-temperature deep impurity removal; (4) carrying out liquefaction and rectification. Thepreparation device and the preparation technology, disclosed by the invention, have the advantages of simple technology, low operation energy consumption and convenience for operation; under the condition that a few of sets of equipment need to be increased based on previous process equipment, and the liquid carbon dioxide with the content more than 99.995 percent can be stably produced; the generation of solid wastes is reduced and the investment cost is reduced.
Owner:杭州快凯高效节能新技术有限公司
Accuracy compensation method of coaxial macro-micro composite linear motion platform device
InactiveCN103170845BGuaranteed continuityNo lagMeasurement/indication equipmentsOther manufacturing equipments/toolsElectricityLinear motion
Owner:SANYING MOTIONCONTORL TIANJIN INSTR CO LTD
Motor phase current sampling method and device
ActiveCN111308170AExpand the range of selectionHarmonic reductionMeasurement using digital techniquesPhysicsDC-BUS
The invention discloses a motor phase current sampling method and device. The method comprises the steps of determining a target boundary region, wherein the target boundary region is a boundary region in an invalid region where phase current cannot be reconstructed; obtaining a target response curve of the DC bus current in the target boundary area and a target sampling point of the DC bus current, the target response curve being a pre-predicted response curve of the DC bus current when a motor sends a control signal; and determining whether to perform translation processing on the target sampling point according to the target response curve and the target sampling point. According to the invention, the technical problems of high cost and poor control effect of single-resistor current sampling in the prior art are solved.
Owner:ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT
Control method and device for task running
ActiveCN108121432AReduced Power RequirementsExpand the range of selectionPower supply for data processingEnergy efficient computingCurrent electricModel selection
The invention discloses a control method and device for task running. The method comprises the steps that when a task obtains a CPU use permission, a current current value of a system is acquired; a running current threshold of the task is acquired; the running current threshold is the difference between a maximum instantaneous current value permitted by the system and a power consumption currentvalue of the task; if the current current value is not higher than the running current threshold of the task, the task is run; and if the current current value is higher than the running current threshold of the task, the task is suspended. Through the technical scheme, on the premise of not changing a task scheduling algorithm of the system, task running or suspension can be controlled, the current peak value of the system is reduced, the requirement of equipment on power of a power source is lowered, the model selection range of the power source can be expanded, equipment cost is lowered, and the control method and device are quite suitable for embedded equipment and other products with a strict requirement on power sources. In this way, voltage ripples are reduced, and the stability ofoutput voltage of the power source is improved.
Owner:THUNDERSOFT +1
Feeding device of cooling water filter
InactiveCN110605553AAdjustable installation positionExpand the range of selectionMetal working apparatusEngineeringHydraulic cylinder
The invention provides a feeding device of a cooling water filter. The feeding device comprises an assembling table and a feeding frame, the feeding frame is arranged on the rear side of the assembling table, supports are arranged on the left side and the right side of the feeding frame, the lower end of the supports is fixed with a base, an anchoring hole is formed in the upper end face of the base, a through hole is formed in the upper end face of the support, a threaded rod is arranged in the through hole, a carrier plate is fixed at the lower end of the threaded rod, the lower end surfaceof the carrier plate is provided with a hydraulic cylinder, the lower end of the hydraulic cylinder is fixedly with a connecting plate, the connecting plate is fixedly connected with the feeding frame, the threaded rod is provided with a first nut and a second nut, the first nut is arranged on the upper side of the supports, and the second nut is arranged on the lower side of the supports. Compared with the related technology, the feeding device has the beneficial effects that the purpose of adjusting the mounting position of the hydraulic cylinder is achieved, the selection range of the hydraulic cylinder is enlarged, and the universality is improved.
Owner:苏州宝达冷热设备有限公司
Control method of isolated power supply based on non-isolated power supply chip
InactiveCN105915062AExpand the range of selectionDc-dc conversionElectric variable regulationCapacitanceCoupling inductor
The invention provides a control method of an isolated power supply based on a non-isolated power supply chip, comprising: connecting with a power supply VI, loading a voltage to the main coil LPRI of a coupling conductor, and storing energy until a power switch Q1 is turned off; from the secondary coil LSEC of the coupling conductor, transmitting the voltage to an output capacitor C and a load resistor R through an output diode CR1; processing an output voltage VO, comparing the voltage with the reference voltage Vref in an error amplifier, and then the error amplifier outputting a corresponding input voltage VE to a non-isolated power supply control chip; and the non-isolated power supply control chip performing corresponding adjustment on a duty ratio through the output voltage VE of the error amplifier, thereby controlling energy storage in the main coil LPRI of the coupling conductor, completing output voltage VO control, and substantially enlarging the chip type selecting range of isolated power supply design.
Owner:FUJIAN STAR NET WISDOM TECH CO LTD
Combined contra-rotating paddle electric propulsion system
PendingCN111661293AImprove propulsion efficiencyStand-alone power is smallPropulsion power plantsSteering by propulsive elementsElectric machineryDieseling
The invention relates to a combined contra-rotating propeller electric propulsion system. The combined contra-rotating propeller electric propulsion system comprises a first motor, a shafting system,a first screw propeller and a rim type propeller. Propulsion efficiency is improved, the power of a large diesel engine which is high in price and limited in model selection range is delegated to a plurality of small-power generator sets through the mode of the electric propulsion system, so that a model selection range is expanded, and the initial installation cost of a power system is reduced. Arudder and propeller integrated type is adopted, the maneuverability of a ship is improved. The system is particularly suitable for medium and large ships.
Owner:珠海市汉图达科技有限公司
Hybrid drive system and vehicle
PendingCN109986949ASmall volume limitSimple structureGas pressure propulsion mountingPlural diverse prime-mover propulsion mountingElectric machineEngineering
The invention relates to a hybrid drive system and a vehicle. The system comprises an engine, a first motor, a transmission and an output part; a power shaft of the first motor is coaxially connectedwith an output shaft of the engine; the transmission is located between the engine and the first motor and comprises a double clutch, a first gear set and a second gear set, an output shaft of the engine is connected with an input end of the double clutch, a first output shaft of the double clutch is connected to the first gear set, and a second output shaft of the double clutch is connected to the second gear set; the output part is used for outputting power transmitted by the first gear set or the second gear set so as to drive the vehicle.
Owner:BYD CO LTD
Construction method of PCB packaging model
PendingCN114364135ASimple designMeet the requirements of creepage distancePrinted circuit assemblingElectrical connection printed elementsSchematic mapsHemt circuits
The invention discloses a construction method of a PCB (Printed Circuit Board) packaging model. The method comprises the steps of designing and drawing a PCB packaging model corresponding to a high-voltage component according to a packaging schematic diagram recommended in high-voltage component data and a PCB through hole bonding pad manufacturing standard; according to the electrical gap and the creepage distance which need to be met by the high-voltage component in the actual circuit, determining the minimum value of the distance between the edges of the adjacent bonding pads in the actual PCB packaging, and judging whether the distance between the edges of the adjacent bonding pads in the drawn PCB packaging model reaches the minimum value or not; and if the result is not reached, carrying out pad design optimization on the drawn PCB packaging model, and optimizing the shape of a pad into an oval shape. According to the method provided by the invention, when the pin spacing of the high-voltage device meets the requirement of the creepage distance and the packaging bonding pad for PCB packaging does not meet the safety condition, the design of the bonding pad can be optimized according to the method provided by the invention, so that the PCB packaging model obtained after optimization can meet the requirement of the creepage distance, the through-flow can be increased, and the cost can be saved.
Owner:清能德创电气技术(北京)有限公司
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