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51results about How to "Meet power consumption" patented technology
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Low-power consumption hand-hold electric nasus system for testing on-site
InactiveCN101226166AReduce power consumptionMeet power consumptionMaterial analysis by electric/magnetic meansSensor arrayHand held
The invention provides a low power consumption hand-held electric nose system for on-site check, which comprises an electric nose box provided with a gas flow control system which gas chamber is at least provided with a mixture sensor array composed of low power consumption gas sensitive sensors, wherein the electric nose box is further provided with a necessary electric checking circuit, a wireless communication module and / or a USB module, a single chip and a DSP system for data processing and mode recognition, the electric checking circuit is provided with a CPLD circuit for checking QCM gas-sensitive sensor signal and a circuit for regulating electrochemical gas-sensitive sensor signal check and temperature humidity senor signal check. The invention can independently work without computer and automatically realize gas flow control, smell check, signal pretreatment and character extraction, mode recognition and display alarm or the like in an independent instrument, to meet the real-time, low power consumption and hand-held demands of on-site check.
Owner:ZHEJIANG UNIV
Determined communication scheduling method of industrial wireless network
InactiveCN101321127AResolve interferenceSolve communication problemsData switching networksWireless communicationAutomatic controlWireless control
The invention requests a certainty communication scheduling method for protecting industrial wireless network, relating to the field of industrial automatic control. Aiming at the problem that the existing industrial wireless network is unable to basically solve the beacon collision problem of multi-hop network, the invention redefines super-frame structure according to IEEE 820.15.4 standard. Competition stage, dedicated stage and dormant stage are defined in the super-frame structure. The communication scheduling between nodes is controlled according to the super-frame structure. The channel is changed once at the beginning of every super-frame by adopting the channel hopping technology, so that the channel sequence of the whole network is different and the take-off points of every cluster are different. The invention which solves the beacon collision problem of multi-hop network can be widely applied to the industrial wireless control network.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Small distribution testing control system for satellite
InactiveCN1897404ARealize autonomous online monitoringImprove reliabilityTransmission systemsCircuit arrangementsControl systemData acquisition
A minisize distribution controlling system for satellite includes: the system attempering and controlling circuit, the 1553B bus interface circuit, the simulation quantity telemetering circuit, the digital quantity telemetering circuit, and the switch dictate outputting circuit. The invention can achieve the independent online monitoring of the satellite system with higher reliability and stability, brings the design idea and achieving method of data collection and processing based on FPGA technology.
Owner:NAT SPACE SCI CENT CAS
An unattended house management system based on a narrow-band internet of things
PendingCN107230139AReduce power consumptionMeet power consumptionIndividual entry/exit registersBuying/selling/leasing transactionsSystem serviceInternet of Things
The invention discloses an unattended house management system based on a narrow-band internet of things. The system comprises an intelligent door lock with a password unlocking function, a rental system server and a mobile phone APP. The server stores rental status of a house, and stores and sends room number, the state of the intelligent door lock corresponding to the room number and a control command for the intelligent door lock, and stores the room number and passwords of the intelligent door lock corresponding to the room number to one database. The mobile phone APP obtains the room number, the state of the intelligent door lock corresponding to the room number and the passwords of the intelligent door lock, controls the state of the intelligent door lock and the passwords of the intelligent door lock, and realizes renting and not renting in the rental system server. The rental system server resets the passwords of the intelligent door lock when the mobile phone APP transmits a not-renting signal, the passwords being random passwords. The intelligent door lock adopts a narrow-band internet-of-thing communication module to communicate with the rental system server.
Owner:天网互联科技(深圳)有限公司
Contact sampling frequency switchover method and device
ActiveCN103034347AAvoid Problems That Affect Power ConsumptionMeet special requirements for touch operationInput/output processes for data processingDevice statusEngineering
The invention provides a contact sampling frequency switchover method and a contact sampling frequency switchover device. The contact sampling frequency switchover method and the contact sampling frequency switchover device are specifically applied to electronic equipment with at least two operating modes. The contact sampling frequency switchover method comprises that states of current electronic equipment is detected in a first operating mode; when the states of the current electronic equipment meet frequency switchover conditions, a contact sampling frequency switchover instruction is generated; and the electronic equipment is changed to a second operating mode according to the instruction, and a first contact sampling frequency is changed to a second contact sampling frequency. According to the embodiment of the contact sampling frequency switchover method and the contact sampling frequency switchover device, the contact sampling frequency is changed according to current states of the electronic equipment, and therefore control to the contact sampling frequency is achieved. Special requirements of touching operations can be met through changing the contact sampling frequency, and meanwhile power consumption of the equipment can be controlled. The problem that power consumption of the equipment is influenced when the special requirements of the touching operations are met due to adoption of a fixed contact sampling frequency is solved.
Owner:LENOVO (BEIJING) LTD
Air drying system and working method of biomass capable of efficiently recovering waste heat
InactiveCN105043077AMeet power consumptionHigh waste heat transfer efficiencyDrying gas arrangementsEnergy industryOrganic Rankine cycleMechanical energy
Provided is an air drying system and a working method of biomass capable of efficiently recovering waste heat, pertaining to the field of energy conservation. The system is mostly composed of an air drying subsystem for biomass and an organic-fluid Rankine cycle subsystem for waste heat recovery. The organic-fluid Rankine cycle subsystem for waste heat recovery utilizes a non-azeotropic refrigerant (12) and adopts a sensible heat regenerator (5) and a latent heat regenerator (6) to recycle latent heat and sensible heat of wet and hot air at the outlet of a drying box (4) stepwise. The latent heat and sensible heat are converted into mechanical energy by means of an expansion machine (16). The mechanical energy cannot only satisfy the requirement of low-power consumption of a compressor (8) but also can output a part of useful power outwards. Compared with a conventional independent air drying system for biomass and an independent low-temperature organic-fluid Rankine cycle system, the system can utilize low-grade hot-drying biomass and have higher efficiency of heat-work conversion by means of stepwise recovery of waste heat, which is especially suitable for an improvement on the air drying subsystem for biomass.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Wearable pneumatic skiing exoskeleton power assisting device
PendingCN108340360AReduce power consumptionMeet power consumptionProgramme-controlled manipulatorAccelerometerGyroscope
The invention discloses a wearable pneumatic skiing exoskeleton power assisting device which comprises a thigh assembly, a crus assembly and a control device, wherein the lower end of the thigh assembly is connected with the crus assembly through a rotating assembly and an air spring bumper, and a thigh fixing pad is arranged at the upper end of the thigh assembly. By means of joint action of telescopic movement of an air spring and a variable damper, shock effects in skiing to knee joints are reduced, auxiliary force is provided for the knee joints, the gravity is compensated, and muscle fatigue in exercise is avoided; by means of designing and utilizing an embedded control system based on an ARM board and a PC, human-computer interaction and real-time control on a robot are better achieved; in addition, human motion parameters obtained through a gyroscope and an accelerometer can be used for detecting intention of a user; furthermore, the air spring and textile are utilized for automatically adjusting auxiliary torsion at the knee parts. The wearable pneumatic skiing exoskeleton power assisting device disclosed by the invention can be well applied to a wearable skiing exoskeletonrobot, can reduce energy consumption in skiing, improves comfortableness and has great application value.
Owner:UNIV OF SCI & TECH OF CHINA
Display method and electronic equipment
InactiveCN110658906AAvoid wasting powerMeet power consumptionDigital data processing detailsAcquiring/recognising facial featuresComputer hardwareComputer graphics (images)
The invention provides a display method and electronic equipment, and relates to the technical field of information display. The display method comprises the steps that when the electronic equipment is in a first screen-off state, the electronic equipment does not display information, and the electronic equipment collects a first image through a camera; when the first image comprises a face image,and the face image is matched with a preset condition, the electronic equipment enters a second screen turn-off state, and when the electronic equipment is in the second screen turn-off state, the electronic equipment turns off the screen to display information; and when the first image does not include the face image, or when the first image includes the face image, but the face image is not matched with the preset condition, the electronic equipment maintains a first screen-off state. According to the display method provided by the embodiment of the invention, the user state is monitored, and the display information in the screen-off state is determined if the user has the specific expression or the user is judged to be the owner, so that the problem of high power consumption caused byalways starting the screen-off display mode is avoided.
Owner:HUAWEI TECH CO LTD
Time slot channel allocation method based on maximum matching in industrial wireless network
ActiveCN104093208ASolve the hidden end problemIncreased achievable throughputHigh level techniquesWireless communicationData trafficWireless network
The invention discloses a time slot channel allocation method based on maximum matching in an industrial wireless network. According to the method, a maximum matching algorithm is used for allocating time slot resources in the network, so that the data traffic in a unit time slot in the network is improved, and the hibernation time of nodes is guaranteed. A vertex coloring algorithm is used for allocating the channel resources in the network, and the interference problem in the network is solved. The two allocation methods are integrated to establish a dispatch table for a communication network, dispatching management for node behaviors in the network is achieved, the hibernation time of the nodes is increased, node energy is saved while the certainty and the reliability of time slots are guaranteed, and the life cycle of the network is prolonged.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Voltage control method and device, electronic equipment and readable storage medium
ActiveCN112114652AMeet power consumptionReduce power consumptionPower managementDigital data processing detailsNetwork connectionVoltage regulation
The invention discloses a voltage control method and device, is applied to electronic equipment, and belongs to the technical field of electronics. The electronic equipment comprises a power supply chip and a load chip, wherein an output end of the power supply chip is connected with a first pin of the load chip through a power supply network, the power supply network has first impedance, the first impedance is related to physical parameters of the power supply network in an initial state, and the method comprises the following steps of acquiring first impedance of the power supply network; based on the use duration of the electronic equipment, second impedance of a power supply network being obtained, and the second impedancebeing related to the aging degree of the power supply network; based on the actual working current, the first impedance and the second impedance of the power supply network, a first voltage and a second voltage of the power supply network being obtained, the firstvoltage being related to the first impedance, and the second voltage being related to the second impedance; obtaining a target voltage according to the first voltage, the second voltage and a third voltage required by the load chip; and adjusting the output voltage of the power supply chip to the target voltage.
Owner:VIVO MOBILE COMM CO LTD
Low-electric quantity starting-up method and user equipment
ActiveCN103491248AMeet power consumptionFast bootPower supply for data processingSubstation equipmentElectrical batteryRandom access memory
The invention discloses a low-electric quantity starting-up method and user equipment. The low-electric quantity starting-up method comprises the following steps: the user equipment (UE) runs a first subprogram in a boot loader so as to judge whether the UE is charged through a universal serial bus (USB); if the UE is charged through the USB and the battery level is lower than a starting-up threshold value, the UE initializes the USB; when the USB enumerates the UE successfully, the UE runs a second subprogram in the boot loader so as to initialize an off-chip random access memory in the UE; the UE runs a third subprogram in the boot loader so as to read a system mirror image from an off-chip flash memory in the UE and load the system mirror image into the off-chip random access memory; the UE runs the system mirror image so as to complete starting-up.
Owner:HUAWEI TECH CO LTD
Detection device and method for phase encoding synchronous time difference of ultrasonic flowmeter
InactiveCN103162752AHigh measurement accuracyMeet power consumptionVolume/mass flow measurementTraffic volumeVIT signals
The invention discloses a detection device and a method for phase encoding synchronous time difference of an ultrasonic flowmeter. A pair of ultrasonic transducers is used as a signal sending-receiving probe group and is respectively mounted on two sides of a pipeline with a certain distance; a measurement period of the synchronous time difference detection method comprises two processes, namely controlling the two ultrasonic transducers to be simultaneously used as a sending end to send 13-bit barker code signals of different frequencies and controlling the two ultrasonic transducers to stop sending signals and wait to receive signals, and using relevant processing methods, the time for the first ultrasonic transducer to send signals to the second ultrasonic transducer can be precisely measured and recorded, and the time for the second ultrasonic transducer to send signals to the first ultrasonic transducer can be precisely measured and recorded. According to the data, combining with geometric information, flow velocity and flow quantity can be calculated. Compared with a traditional time difference method, the detection method can meet the requirements of the time-difference method ultrasonic flowmeter on high measurement precision.
Owner:NANJING UNIV OF SCI & TECH
Layout method of LED array in visible light communication system
InactiveCN106686828AIncrease system power consumptionReduce power consumptionElectrical apparatusElectroluminescent light sourcesSingle pointLight source
The invention relates to a layout method of an LED array in a visible light communication system. The method comprises the steps of firstly giving an indoor space model and obtaining space parameters in the indoor space model; obtaining radiation characteristics of a single point light source through analyzing the radiation node of the single point light source and then giving the radiation characteristics of the LED array; and determining the size of the LED array and building a mathematic model of taking the illumination uniformity and the communication reliability into account through the radiation characteristics of the array on an indoor ceiling and finally obtaining indoor LED array layout parameters capable of taking the energy consumption, the illumination and the communication reliability into account. The layout method is simple in operability, can be expanded to any size of room and has feasibility, and an effective way can be provided for indoor light source layout of the visible light communication system.
Owner:XIAN TECHNOLOGICAL UNIV
Spraying system
The utility model discloses a spraying system which is arranged in a wet-method flue-gas desulfurization and absorption tower. The spraying system comprises a plurality of layers of spraying layers, wherein, main spraying pipes, branch spraying pipes and a nozzle are arranged in the spraying layers, at least two parallel main spraying pipes are arranged on each spraying layer and two ends of the main spraying pipe are supported on the tower wall of the absorption tower. For the absorption tower with large cross section, after at least two main spraying pipes are adopted, support beams of the branch spraying pipes can be saved so as to reduce the erosion to the support beam; by adopting the solid and tapered nozzle that is arranged near the periphery of the tower wall of the absorption tower, the wall-flow phenomenon and the spraying amount of the slurry can be reduced and the spraying effect of the slurry can be ensured to be more effective.
Owner:上海融新能源环境科技有限公司 +5
System for combined cycle mechanical drive in cryogenic liquefaction processes
InactiveCN102203531AReduce fuel requirementsReduce manufacturing costSolidificationLiquefactionHeat rejectionNatural gas
A system for producing liquefied and sub-cooled natural gas by means of a refrigeration assembly using a single phase gaseous refrigerant comprises at least two expanders; a compressor assembly; a heat exchanger assembly for heat absorption from natural gas; and a heat rejection assembly, in which the expanders are arranged in expander loops and the refrigerant to the respective expander is served in a compressed flow by means of the compressor assembly having compressors or compressor stages enabling adapted inlet and outlet pressures for the respective expander. According to the present the expanders and compressors assembly are assembled in two mechanically connected compressor and expander packages (200, 300) of which one is driven by a gas turbine (201) and the other is driven by a steam turbine (301), the steam primarily being generated by exhaust gases from the gas turbine in a waste heat recovery unit (202), and in that the expanders and compressors assemblies are distributed between the two compressor and expander packages to optimize the steam utilization and to balance the power generated by the gas turbine and the steam turbine.
Owner:海威气体系统公司
Multi-stack fuel cell control method, control device, system and vehicle
ActiveCN113173108AFix security issuesFix stability issuesBattery/fuel cell control arrangementTransportation hydrogen technologyFuel cellsControl theory
The invention belongs to the field of battery control, and provides a multi-stack fuel cell control method, a control device, a system and a vehicle. The control method comprises the following steps that in a starting time period of a multi-stack fuel cell, the currently required power is averagely distributed to each fuel cell stack; in an operation time period after the multi-stack fuel cell is started, the aging degree of the corresponding stack at the current moment is obtained according to the magnitude of the output voltage of each fuel cell stack, and then the power variable at the next moment is allocated to each fuel cell stack according to the aging degree and the variation of the required power at the next moment, so that, the aging degrees of the multiple stacks of fuel cells tend to be consistent.
Owner:CRRC QINGDAO SIFANG CO LTD
Low-power consumption hand-hold electric nasus system for testing on-site
InactiveCN101226166BReduce power consumptionMeet power consumptionMaterial analysis by electric/magnetic meansSensor arrayNose
The invention provides a low power consumption hand-held electric nose system for on-site check, which comprises an electric nose box provided with a gas flow control system which gas chamber is at least provided with a mixture sensor array composed of low power consumption gas sensitive sensors, wherein the electric nose box is further provided with a necessary electric checking circuit, a wireless communication module and / or a USB module, a single chip and a DSP system for data processing and mode recognition, the electric checking circuit is provided with a CPLD circuit for checking QCM gas-sensitive sensor signal and a circuit for regulating electrochemical gas-sensitive sensor signal check and temperature humidity senor signal check. The invention can independently work without computer and automatically realize gas flow control, smell check, signal pretreatment and character extraction, mode recognition and display alarm or the like in an independent instrument, to meet the real-time, low power consumption and hand-held demands of on-site check.
Owner:ZHEJIANG UNIV
Effort testing device for electric multi-rotor aircraft
ActiveCN105510702AEasy to fixReal-time monitoring integrationApparatus for force/torque/work measurementPower measurement by current/voltageMicrocomputerMicrocontroller
Provided is an effort testing device for an electric multi-rotor aircraft. The effort testing device comprises a bearing platform, a current and voltage sampling module, a single chip microcomputer and a computer, wherein the aircraft is installed on the bearing platform, the bearing platform is provided with a strain sensor for collecting aircraft installing tensile force value, the current and voltage sampling module is used for collecting the current and voltage values of the aircraft at any moment, the single chip microcomputer is used for receiving the collected tensile force value and the current and voltage values and uploading the collected tensile force value and the current and voltage values to the computer, and the computer receives various data sent by the single chip microcomputer. According to the effort testing device, the aircraft is fixed on the bearing platform, the single chip microcomputer is utilized to collect the tensile force value reflected by a strain beam on the bearing platform and power consumption value collected by a voltage and current sensor, and the tensile force value and the power consumption value are uploaded to the computer through a serial port to provide data for the effort analysis of the aircraft. The effort testing device can achieve the test of the relation between the tensile force and the power consumption of the multi-rotor aircraft and an unmanned aerial vehicle and provide reliable verification for the matching of related devices of the aircraft and the determination of the optimum working state of the aircraft.
Owner:NORTHWEST A & F UNIV
Novel energy-saving corrosion-resistant anode steel claw for electrolyzing aluminum and design method thereof
ActiveCN109898101ASmall pressure dropPrevent high temperature corrosionHigh-temperature corrosionElectrolyte
The invention belongs to the technical field of aluminum electrolyzing equipment, and discloses a novel energy-saving corrosion-resistant anode steel claw for electrolyzing aluminum and a design method thereof. The design method for the novel energy-saving corrosion-resistant anode steel claw for electrolyzing the aluminum comprises the following steps: performing simulation calculation on the designed maximal bearing force of Fmax, the safety coefficient of alpha, the effective cross section of the steel claw of S0 and the yield strength of the material of ReL when a half steel claw works byutilizing a computer, and acquiring the optimal proportional components of the material of the half steel claw; and calculating and analyzing the voltage drop of the half steel claw and a half aluminum claw in use by utilizing the computer, and acquiring an optimal composite claw voltage drop value. According to the novel energy-saving corrosion-resistant anode steel claw for electrolyzing the aluminum and the design method thereof, the voltage drop of an anode is reduced and the electric energy is saved by connecting the half steel claw and the half aluminum claw in parallel; the high-temperature corrosion of an anode claw caused by an electrolyte and a corrosive atmosphere can be effectively prevented by a thin graphene layer which coats the outside the overall anode claw, so that the service life of the anode claw is prolonged; the anode claw is not corroded; the conductive cross section is effectively remained; and the electric energy can also be saved greatly.
Owner:NANKAI UNIV
Multi-function transceiving circuit
ActiveCN103236869AIntegrated functions are complexUltra low power consumptionTransmissionPower-added efficiencyUltra low power
The invention discloses a multi-function transceiving circuit, and relates to the technical field of transceiver circuits. The multi-function transceiving circuit comprises an antenna-end channel selecting switching circuit, a receiving channel low-noise amplifier circuit, a driving-end channel selecting switching circuit, a transmitting channel power amplifier circuit and transceiver branch power source controlling circuit. The receiving channel low-noise amplifier circuit and the transmitting channel power amplifier circuit are current reuse circuits. The antenna-end channel selecting switching circuit and the driving-end channel selecting switching circuit are adopted switch floating circuits. The multi-function transceiving circuit is characterized by complex integrated functions, ultra-low power consumption, high power addition efficiency, high requirements on temperature stability and the like. As combined with the chip processing technique characteristics, varied novel technologies such as current reuse technology of amplifiers and float switches are employed innovatively, various specified requirements of ultra-low power of receiving braches and high power addition efficiency of transmitting branches are met, the whole circuit topology for different application backgrounds is optimized and innovated, and various indicators are achieved.
Owner:THE 13TH RES INST OF CHINA ELECTRONICS TECH GRP CORP
Motor control device of intelligent terminal and intelligent terminal
InactiveCN108270383ASimple structureReduce power consumptionAC motor controlElectric motor controlElectricityControl signal
The invention discloses a motor control device of an intelligent terminal and an intelligent terminal. The motor control device comprises a processor and a motor circuit. The processor is electricallyconnected with the motor circuit. The processor is used for controlling the motor circuit to drive a motor to vibrate. The motor control device further includes a switch circuit. The switch circuit is electrically connected with the processor. The motor circuit is electrically connected with the motor through the switch circuit. The processor is further used for generating a switch control signal. The switch control signal is used for controlling the on / off of the switch circuit. When the switch control signal is high in level, the switch circuit is in an on state, and when the switch controlsignal is low in level, the switch circuit is in an off state. According to the invention, by only adding the switch circuit and combining the switch control signal to control the on and off of the switch circuit, the intermittent driving of the motor is realized, the problem that the long vibration or the constant voltage vibration of the motor consumes a lot of electric energy is well solved, the circuit is simple, the cost is low, the power consumption is low and the size is small, and the requirements of the intelligent terminal can be well met.
Owner:SHANGHAI MORUAN COMM TECH
Power amplifier chip biasing circuit based on GaAs HBT process
ActiveCN111665898AReduce power consumptionMeet the volumeElectric variable regulationHemt circuitsComputational physics
The invention discloses a power amplifier chip biasing circuit based on a GaAs HBT process, and relates to a new generation information technology, thereby solving a problem that in the prior art, a temperature compensation means has negative effects on size, power and the like. A diode and a first resistor are used for obtaining temperature induction resistance; meanwhile, a plurality of HBT tubes are connected in series to replace traditional resistors, a bias voltage is led out from each HBT tube, and multi-order positive temperature coefficient voltage output is achieved. Furthermore, thevoltage is converted through a current mirror and a positive temperature coefficient second resistor, and a bias current for temperature drift suppression is provided for the power amplifier chip. Andthe requirements of mobile equipment on high integration level, high power output, high stability and low cost are effectively met. Therefore, strict requirements of the power amplifier chip of the mobile equipment in the aspects of size, power consumption, long-term sustainable work and the like can be met with very low complexity and relatively high reliability in the aspect of implementation,and the power amplifier chip biasing circuit has a good popularization value.
Owner:SOUTH CHINA UNIV OF TECH
High-power power supply backplane for high density assembling
ActiveCN110691487AIncrease or decrease the amount of equipmentImprove application flexibilityServersData center roomsBasic power supplyHigh density
The invention discloses a high-power power supply backplane for high density assembling. The high-power power supply backplane comprises a PCB. At least one basic power supply unit is formed on the PCB. The basic power supply unit comprises an incoming wire pad L, an incoming wire pad N, a power supply L layer, a power supply N layer and at least one power supply interface. An insulating medium isfilled between the power supply L layer and the power supply N layer. The incoming wire pad L is electrically connected with the power supply L layer.The incoming wire pad N is electrically connectedwith the power supply N layer.The power supply L layer and the power supply N layer are respectively electrically connected with the L pin and the N pin of the power supply interface. The high-powerpower supply backplane has good application flexibility and high adaptability and can realize high-density assembling of calculation plug-ins and has small occupied space, uniform heating, high powersupply safety and good maintainability.
Owner:JIANGNAN INST OF COMPUTING TECH
Double-section coaxial toothed cathode pulse plasma thruster
PendingCN114001003AReduce discharge voltageEasy dischargeMachines/enginesUsing plasmaCapacitanceEngineering
The invention discloses a double-section coaxial toothed cathode pulse plasma thruster, and belongs to the technical field of micro satellite aerospace propulsion. The product mainly comprises a first-stage cathode, a first-stage anode, an insulating coating layer, a second-stage cathode, a second-stage anode, a propellant, an insulating outer shell, an insulating base, a supply spring and a spark plug. The inner surface of the primary cathode is provided with sharp teeth, so that the primary cathode is easier to discharge compared with a common cylindrical inner surface by utilizing a point discharge principle, and the system safety is improved; and the toothed cathode is used, so that the electric field and the current between the electrodes are more uniform, the non-uniform ablation of the propellant is improved, the indentation of the end face of the solid propellant in the continuous working process is reduced, the reliability is remarkably improved, and the working life is prolonged. The secondary cathode is in the shape of an expanded spray pipe, so that charged particles and neutral gas generated by discharging between the primary electrodes are accelerated more sufficiently, and the primary electrodes and the secondary electrodes are charged by respective independent capacitors, so that the reasonability of energy distribution is improved, and the overall acceleration efficiency of the thruster is improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Power management circuit with low power consumption
PendingCN111367351AMeet power consumptionReduce power consumptionElectric variable regulationEngineeringPower management
The invention discloses a power management circuit with low power consumption. The power management circuit comprises a reference circuit, a comparator, a clock generation circuit, a power acquisitionsensor, a switching circuit and a charged module. One end of the reference circuit and one end of the power supply acquisition sensor are respectively connected with one end of the comparator. The other end of the comparator is connected with one end of the clock generation circuit, the other end of the clock generation circuit is connected with the control end of the switch circuit, one end of the power supply acquisition sensor is further connected with one end of the switch circuit, and the other end of the switch circuit is connected with the charged module. Compared with the prior art, the power consumption of the power management circuit is reduced.
Owner:INNER MONGOLIA XIANHONG SCI
Power management system
PendingCN111221400AMeet power consumptionFulfil requirementsVolume/mass flow measurementPower supply for data processingAsic technologyUltra low power
The invention discloses a power management system, and relates to the technical field of integrated circuits. The power supply management system comprises an ultra-low power consumption voltage stabilizer module for supplying power to a load module in a standby mode, a high power consumption voltage stabilizer module for supplying power to the load module in a working mode, and a controller, the switching module is used for receiving an enable signal to switch off the high-power-consumption voltage stabilizer module and switch on the ultra-low-power-consumption voltage stabilizer module when the load module enters a standby mode; and when the load module enters the working mode from the standby mode, the high-power-consumption voltage stabilizer module is switched on, and then the bilateral selection switch module of the ultra-low-power-consumption voltage stabilizer module is switched off. According to the power management system, the voltage stabilizer modules with different power consumption and different performances are selected through the bilateral selector switch module to supply power to the load module, and the power consumption and performance requirements of the load module in different modes are met.
Owner:CHENGDU ANALOG CIRCUIT TECH INC
Frequency hopping frequency testing method and device in built-in testing of frequency hopping communication equipment
ActiveCN112003653AImplement testMeet the volumeTransmitters monitoringTelecommunicationsControl theory
The invention discloses a frequency hopping frequency testing method and device in built-in testing of frequency hopping communication equipment, and relates to the technical field of communication equipment testing methods and testing equipment. The method comprises the following steps o: detecting the power of a frequency hopping signal to obtain a frequency hopping rate waveform, wherein the frequency hopping rate waveform is subjected to NOT gate reversing and then is combined with a reference clock waveform to form a frequency hopping rate counting waveform; obtaining a frequency hoppingfrequency value according to the frequency hopping frequency counting waveform, taking a rising edge of the power detection output waveform as a test starting signal of each frequency hopping frequency, starting a test delay t1, then performing a frequency test of each frequency within t2 time, counting the frequency of each frequency, and obtaining a frequency hopping frequency set after countingfor a period of time. According to the method, a frequency hopping power detection output waveform is adopted as triggering of frequency hopping frequency counting, testing of the frequency hopping frequency is achieved, and testing of a frequency hopping frequency set is achieved through statistics of the frequency hopping frequency for a period of time.
Owner:NAT UNIV OF DEFENSE TECH
Ad hoc network wireless transmission system and method based on channel quality monitoring
PendingCN114531702AReduce the level of radio frequency interferenceReduce the complexity of provisioningAntenna supports/mountingsTransmission monitoringChannel dataWireless transmission
The invention relates to the field of industrial wireless transmission systems, in particular to an ad hoc network wireless transmission system and method based on channel quality monitoring. The implementation method of the system comprises the following steps that the WIA-FA far-end wireless transmission units are opened for the first time, 360-degree signal capturing tasks can be automatically executed, channel data of the WIA-FA center wireless transmission units captured at all rotation angles are recorded, the WIA-FA far-end wireless transmission units automatically select and lock the WIA-FA center wireless transmission unit with the optimal transmission quality, and the WIA-FA far-end wireless transmission units are started for the first time. After the WIA-FA center wireless transmission unit is locked, directional antenna horizontal angle fine adjustment, directional antenna vertical angle fine adjustment and automatic power control are carried out, and finally the antenna is automatically adjusted to the optimal position. Through the method, automatic selection of opposite-end connection equipment of the wireless transmission system and automatic alignment of the antenna are realized, and the external interference radiation level of the system is reduced, so that the problems that the central base station of the industrial wireless transmission system is difficult to select, the antenna is difficult to align, and interference among wireless networks is serious are solved.
Owner:SHENYANG ZHONGKE AOWEI SCI & TECH CO LTD
Bicycle assist channel system suitable for mountain cities
Owner:CHONGQING JIAOTONG UNIVERSITY
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