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35results about How to "Reduce peak power requirements" patented technology
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System and method for detection and discrimination of targets in the presence of interference
InactiveUS7474258B1Reduce and eliminates time delay-Doppler shift ambiguity trade-offReduce or eliminates the time delay-Doppler shift ambiguity trade-offRadio wave reradiation/reflectionAlgorithmAmbiguity
Systems and method of detection and discrimination of targets in the presence of interference are disclosed. A system transmits a signal and then receives signals including interference and reflections of transmitted signals. The system processes the received signals and transmitted signals to generate a 2D representation of the STAP cube with one of the dimensions collapsed. The system then reduces the interference contributions and identifies angle and Doppler component of potential targets. The system then computes slices, which are one dimensional representation of cross-ambiguity functions of the received and transmitted signals. It reduces the interference contributions in the slices and determines range components of the targets.
Owner:SIGNAL LABS
System and method for detection and discrimination of targets in the presence of interference
InactiveUS20090027257A1Reduce or eliminates the time delay-Doppler shift ambiguity trade-offReduce peak power requirementsRadio wave reradiation/reflectionAlgorithmAmbiguity
Owner:SIGNAL LABS
Method and apparatus for reducing transmitter peak power requirements using dual matrices
ActiveUS7020215B2Reduce peak power requirementsAmplifiers wit coupling networksSecret communicationAudio power amplifierRadio frequency signal
An apparatus and method thereof for processing base band signals to reduce peak power requirements for a multi-channel transmitter is disclosed. The apparatus includes a first Fourier Transform Matrix (FTM) coupled to one or more input signals for providing a plurality of output signals; a processing unit for limiting a peak value for each of the output signals, and a second FTM for decomposing the peak limited output signals to provide one or more output base band signals, each of the output base band signals corresponding to one of the input signals. A multi-channel transmitter further converts the output base band signals to a radio frequency signals; a first analog FTM provides a plurality of amplifier input signals; a power amplifier having a plurality of amplifiers provides a plurality of amplified output signals; and a second analog FTM coupled to the amplified output signals provides transmit signals corresponding one to one with the output base band signals.
Owner:GOOGLE TECH HLDG LLC
Method and apparatus for reducing transmitter peak power requirements
ActiveUS7012970B2Reduce peak power requirementsAmplifiers wit coupling networksSecret communicationAudio power amplifierPhase shifted
A peak to average reduction apparatus and method thereof for reducing peak power requirements of a multi-channel transmitter is discussed. The apparatus includes: a Fourier Transform Matrix (FTM) coupled to one or more input signals for providing a plurality of output signals each comprising a combination of phase shifted versions of the one or more input signals; and a processing unit coupled to the output signals for limiting a peak value for each of the output signals to provide a plurality of peak limited output signals, wherein the peak limited output signals are suitable for generating a plurality of signals for driving the multi-channel transmitter. A transmitter further includes a power amplifier having a plurality of amplifiers coupled to these signals, each amplifier coupled to a one of the signals that correspond to one of the peak limited output signals to provide an amplified output signal, wherein the plurality of amplifiers provide a plurality of amplified output signals; and a radio frequency FTM coupled to the amplified output signals to provide one or more transmit signals corresponding one to one with the input signals.
Owner:GOOGLE TECH HLDG LLC
Print head pulsing techniques for multicolor printers
ActiveUS20060290769A1Reduce coincidenceReduce peak power requirementsRecording apparatusPrintingEngineeringHeat sensitive
In one aspect of the invention there is disclosed a multicolor thermal imaging system wherein different heating elements on a thermal print head can print on different color-forming layers of a multicolor thermal imaging member in a single pass. The line-printing time is divided into portions, each of which is divided into a plurality of subintervals. All of the pulses within the portions have the same energy. In one embodiment, every pulse has the same amplitude and duration. Different colors are selected for printing during the different portions by varying the fraction of subintervals that contain pulses. This technique allows multiple colors to be printed using a thermal print head with a single strobe signal line. Pulsing patterns may be chosen to reduce the coincidence of pulses provided to multiple print head elements, thereby reducing the peak power requirements of the print head.
Owner:ZINK IMAGING
Biological radar human body target identification method based on zero crossing point technology
InactiveCN103308899AStrong penetrating powerReduce peak power requirementsWave based measurement systemsTime domainHuman body
The invention discloses a biological radar human body target identification method based on a zero crossing point technology. The method comprises following four steps of a zero crossing point extracting step, a time domain accumulating step, a signal to noise ratio estimating step and a threshold value judging step. The condition that human body breathing zero crossing point characteristic quantification is detected by a UWB (ultra-wide bandwidth) biological radar is realized in the zero crossing point extraction step; zero crossing point extraction results are accumulated at time in time domain accumulation step, so that misjudgment caused by accident factors is lowered; the signal to noise ratio estimation is used for quantitative indexes of human body target identification; and set threshold values of the quantitative indexes are judged, and automatic identification on a human body target is finally realized in the threshold value judging step.
Owner:FOURTH MILITARY MEDICAL UNIVERSITY
Miniature hydraulic drive system used for ankle joint artificial limb
InactiveCN107288941AReduce peak power requirementsReduce power consumptionServomotor componentsAccumulator installationsHydraulic pumpCheck valve
The invention discloses a miniature hydraulic drive system used for an ankle joint artificial limb. The miniature hydraulic drive system comprises an electromotor, a hydraulic pump, a first check valve, a second check valve, a first energy accumulator, a second energy accumulator, a first normally-opened switching valve, a second normally-opened switching valve, a first normally-closed switching valve, a second normally-closed switching valve and a double-ejection-rod hydraulic cylinder. In the miniature hydraulic drive system, by means of unceasing work of the motor and energy storage of the energy accumulators, the requirement for the peak power of the motor can be reduced; and the power consumption is lowered during long-term walking so that the cruising ability can be improved. In the miniature hydraulic drive system, the direct-current motor and the hydraulic pump unceasingly work in the whole movement process, the energy utilization efficiency of the system is improved, frequent start, stop and reversing of the motor are avoided, and therefore the usability of the motor is improved, and the service life of the motor is prolonged.
Owner:BEIHANG UNIV
Synthetic aperture radar system based on alternating pulse group receiving and transmitting
ActiveCN103728620AReduce peak powerReduce peak power requirementsRadio wave reradiation/reflectionSynthetic aperture sonarInverse synthetic aperture radar
The invention discloses a synthetic aperture radar system based on alternating pulse group receiving and transmitting. The synthetic aperture radar system is composed of a radar comprehensive electronic unit and a data processing unit. The radar comprehensive electronic unit generates and radiates alternating pulse group radar signals and receives echo signals dispersed by surface features; the data processing unit, in real time, collects the echo signals processed by a receiver to complete the conversion from the alternating pulse group echo waves to single pulse echo signals; lastly, by means of an imaging algorithm, the radar image of a mapped region can be obtained. The synthetic aperture radar system based on alternating pulse group receiving and transmitting reduces the peak power of a transmitter, meanwhile guarantees the maximum action distance of the radar and solves the problem of saturation of near field echo signals under the condition of wide swath.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI
Capacitor charging method and apparatus with constant power input characteristic
ActiveCN105322637AReduce peak power requirementsReduce distractionsBatteries circuit arrangementsAc network load balancingConstant powerBusbar
The invention belongs to the technical field of power supplies, and in particular relates to a capacitor charging method and apparatus with constant power input and constant current output characteristics. A continuous working mode characteristic is mainly adopted, and returned redundant energy is stored in a temporary energy storage link, so as to charge a load and charge the energy storage link at the same time; in addition, a mode of switching an excitation source in the front half cycle of resonance current is adopted to establish an access for outputting energy to a resonance loop in the energy storage link so as to realize that the temporary energy storage link can perform an auxiliary power supplying function together with a power grid in the charging period for the load; and through real-time regulation and control on the switching time, the constant of the power supply power is realized. The temporary energy storage link is a voltage source, and a DC-link direct current busbar is a voltage source also; for avoiding short circuit between the two voltage sources of different voltages, the two voltage sources are serially connected with bidirectional switches respectively and then the voltage sources are connected with the resonant loop so as to realize the reliable switch of the resonant current between the voltage sources.
Owner:SOUTHWEST JIAOTONG UNIV
Print head pulsing techniques for multicolor printers
ActiveUS7830405B2Reduce coincidenceReduce peak power requirementsRecording apparatusPrintingComputer printingSingle pass
Owner:ZINK IMAGING
Electro-hydraulic hybrid drive vehicle power system
InactiveCN108422858AAchieving zero emissionsReduce pollutionElectrodynamic brake systemsGas pressure propulsion mountingHydraulic motorElectric machine
The invention discloses an electro-hydraulic hybrid drive vehicle power system comprising an electronic control unit, motors, a battery pack, a first hydraulic energy accumulator, a variable hydraulicmotor, a clutch, a plurality of sets of wheels and a drive axle. The battery pack is connected with the two motors, the output ends of the two motors are connected with two wheel in one set respectively, the first hydraulic energy accumulator is connected with an oil transportation inlet of the variable hydraulic motor, and the first hydraulic energy accumulator is used for storing recycled braking energy and auxiliary driving and braking; the variable hydraulic motor is connected with the drive axle through the clutch to drive the two wheels in another set, the electronic control unit is respectively connected with the motor, the first hydraulic energy accumulator, the variable hydraulic motor and the clutch, the electronic control unit controls the running working condition of the motorand the displacement of the variable hydraulic motor, the on-off of the first hydraulic energy accumulator and the engagement or separation of the clutch, and the battery pack supplies power to the motor and the electronic control unit. The electro-hydraulic hybrid drive vehicle power system has the advantages of infinitely variable speed and four-wheel driving, energy saving and enhancement of endurance.
Owner:NANJING UNIV OF SCI & TECH
Cabin door transient actuating device based on valve control variable displacement motor and driving method
InactiveCN105485071AReduce peak power requirementsReduce the burden onServomotor componentsServomotorsControl variableHydraulic pressure
The invention relates to a cabin door transient actuating device based on a valve control variable displacement motor and a driving method. One embodiment of the device comprises a servo valve, the variable displacement motor and a load-sensitive mechanism. A first oil inlet of the variable displacement motor is connected with a first oil outlet of the servo valve, and a first oil return port of the variable displacement motor is connected with a second oil outlet of the servo valve. An output shaft of the variable displacement motor is connected with a cabin door load and used for outputting torque for driving the cabin door load. The load-sensitive mechanism is used for adjusting the dip angle of a swash plate of the variable displacement motor based on the hydraulic pressure difference between the first oil inlet and the first oil return port of the variable displacement motor. By the adoption of the scheme, the displacement of the variable displacement motor is adjusted by sensing the load, the throttling effect on the servo valve is weakened under the working condition that the load is not uniform or the load is small, and then the energy utilization rate of a system is increased.
Owner:BEIHANG UNIV
Drive-driven-combined prosthesis knee and ankle joint hydraulic loop with energy recycling function
ActiveCN110368153AReduce peak power requirementsExtend battery lifeArtificial legsHydraulic circuitHydraulic pump
The invention discloses a drive-driven-combined prosthesis knee and ankle joint hydraulic loop with an energy recycling function and aims to solve the problems that a drive hydraulic prosthesis systemis high in energy consumption, short in endurance time and the like. The hydraulic loop comprises a motor, a coupler, a hydraulic pump, a first energy storage device, a second energy storage device,an adjustable throttling valve, a knee joint hydraulic cylinder, an ankle joint hydraulic cylinder, a first three-position four-way proportional valve, a second three-position four-way proportional valve, a third three-position four-way proportional valve, a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor, a fifth pressure sensor, a sixth pressuresensor, a first pipeline and a second pipeline . The hydraulic loop has the advantages that the energy storage devices are controlled through the three-position four-way proportional valves to absorband release energy generated during human body walking, system energy consumption can be effectively lowered by further using the drive-driven-combined drive mode, the performance of lower-limb prosthesis is increased evidently, and structure simpleness and lightweight are achieved conveniently at the same time.
Owner:JILIN UNIV
A capacitor charging method and device with constant power input characteristics
ActiveCN105322637BReduce peak power requirementsReduce distractionsBatteries circuit arrangementsAc network load balancingConstant powerBusbar
Owner:SOUTHWEST JIAOTONG UNIV
Print head pulsing techniques for multicolor printers
InactiveUS7791626B2Reduce coincidenceReduce peak power requirementsRecording apparatusOther printing apparatusEngineeringPulse pattern
In one aspect of the invention there is disclosed a multicolor thermal imaging system wherein different heating elements on a thermal print head can print on different color-forming layers of a multicolor thermal imaging member in a single pass. The line-printing time is divided into segments, each of which is divided into a plurality of subintervals. All of the pulses within the segments have the same energy. In one embodiment, every pulse has the same amplitude and duration. Different colors are selected for printing during the different segments by varying the fraction of subintervals that contain pulses. This technique allows multiple colors to be printed using a thermal print head with a single strobe signal line. Pulsing patterns may be chosen to reduce the coincidence of pulses provided to multiple print head elements, thereby reducing the peak power requirements of the print head.
Owner:ZINK IMAGING
Peak shifting controlling method and device for multi-channel current
InactiveCN104617848AReduce peak power requirementsEasy to integrateElectronic commutation motor controlVector control systemsMiniaturizationPeak value
The invention discloses a peak shifting controlling method for multi-channel current. The method comprises the steps of respectively determining the maximum value of the three-phase current of each motor in a plurality of motors at the same time; respectively judging whether all maximum values are greater than rated current, and carrying out the following operations according to judgment results; if the maximum values are not greater than the rated current, calculating the corresponding duty ratios of the corresponding motors according to a standard space vector algorithm, so as to control the three-phase current of the motors; if the maximum values are greater than the rated current, judging whether the maximum values are greater than the rated current, judging whether the maximum values are maximum values of all motors of which numerical values are maximum, and carrying out the further operation according to the judgment results. According to the peak shifting controlling method and a peak shifting controlling device for multi-channel current provided by the invention, the demand on the peak value power of a servo power supply can be reduced greatly, and the integration and miniaturization degrees of a servo system are higher, therefore the peak shifting controlling method and the peak shifting controlling device are used for the output control of a multi-channel control driver of an electromechanical servo system.
Owner:BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1
Single-ended dual-wavelength high-precision distributed optical fiber temperature sensor
InactiveCN102012281AAvoid nonlinear effectsIncrease widthThermometers using physical/chemical changesOptical elementsImage resolutionPetrochemical
The invention discloses a single-ended dual-wavelength high-precision distributed optical fiber temperature sensor, and belongs to the technical field of optical fiber sensing. In the single-ended dual-wavelength high-precision distributed optical fiber temperature sensor, two light sources with different wavelengths are connected to a pulse driver to ensure that the required precision of spatial resolution is achieved while the required pulse light energy is provided by utilizing the pulse widths of the two light sources. Therefore, the problem that the spatial resolution cannot meet the required precision in the prior art is solved, and the single-ended dual-wavelength high-precision distributed optical fiber temperature sensor is suitable for places with high precision requirement, such as petrochemical pipelines, electric high-voltage switches and the like.
Owner:SHANGHAI BOOM FIBER SENSING TECH
Excavator movable arm series connection type hybrid power system based on double fly wheels
ActiveCN111733908AReduce peak power requirementsReduced installed power requirementsMechanical machines/dredgersGear wheelHydraulic pump
The invention discloses an excavator movable arm series connection type hybrid power system based on double fly wheels. A prime motor is connected with a first hydraulic pump. A port P of the first hydraulic pump is connected with a port P of a first hydraulic motor through a first one-way valve. The first hydraulic pump is connected with a second hydraulic pump sequentially through a one-way clutch, a first speed changer, a first clutch, the first fly wheel, a second clutch and a second speed changer. A port S and a port P of the second hydraulic pump are connected with an oil tank and a portP of a main reversing valve correspondingly. A port A and a port B of the main reversing valve are connected with a rod cavity and a rodless cavity of a movable arm hydraulic cylinder correspondingly. A port T of the main reversing valve is connected with a port P of the second hydraulic motor. A port T of the first hydraulic motor and a port T of the second hydraulic motor are connected with theoil tank. The second hydraulic motor is connected with a second gear sequentially through a third clutch, the second fly wheel, a fourth clutch and a third speed changer. The first gear sleeves a shaft between the one-way clutch and the first speed changer and is engaged with the second gear. The system can conduct energy recycling and reutilizing.
Owner:XUZHOU COLLEGE OF INDAL TECH
Hatch door transient actuation device and driving method based on valve-controlled variable motor
InactiveCN105485071BReduce peak power requirementsReduce the burden onServomotor componentsServomotorsControl variableUtilization rate
The invention relates to a cabin door transient actuating device based on a valve control variable displacement motor and a driving method. One embodiment of the device comprises a servo valve, the variable displacement motor and a load-sensitive mechanism. A first oil inlet of the variable displacement motor is connected with a first oil outlet of the servo valve, and a first oil return port of the variable displacement motor is connected with a second oil outlet of the servo valve. An output shaft of the variable displacement motor is connected with a cabin door load and used for outputting torque for driving the cabin door load. The load-sensitive mechanism is used for adjusting the dip angle of a swash plate of the variable displacement motor based on the hydraulic pressure difference between the first oil inlet and the first oil return port of the variable displacement motor. By the adoption of the scheme, the displacement of the variable displacement motor is adjusted by sensing the load, the throttling effect on the servo valve is weakened under the working condition that the load is not uniform or the load is small, and then the energy utilization rate of a system is increased.
Owner:BEIHANG UNIV
Starting surge current suppression circuit suitable for super-large energy storage capacitor
PendingCN113629681AReduce peak power requirementsReduce inrush currentEmergency protective arrangements for limiting excess voltage/currentCapacitanceHemt circuits
The invention provides a starting surge current suppression circuit suitable for a super-large energy storage capacitor. The circuit comprises an MCU control circuit, a surge suppression circuit and a laser driving circuit which are connected in sequence, wherein the surge suppression circuit is prominently innovated, is internally provided with a plurality of independently arranged current limiting channels controlled by the MCU control circuit, and is used for charging the super-large energy storage capacitor; and the MCU control circuit is the core of the whole circuit and is used for collecting the voltage information fed back by the voltage feedback circuit and controlling the surge suppression circuit to act according to the voltage information so as to reduce the surge suppression current. When the super-large energy storage capacitor is started, the peak power requirement for the power supply devices is greatly reduced through the circuit, the power supply current is stable when the capacitor is charged, and instantaneous interference on other module circuits is avoided; and in addition, the average power consumption of the capacitor can be reduced under the condition that the high-frequency driving is met.
Owner:洛阳顶扬光电技术有限公司
Phased-array antenna subarray power supply circuit and electric appliance with power supply circuit
InactiveCN111769538AReduce volumeReduce weightDc circuit to reduce harmonics/ripplesLow voltageHemt circuits
The invention discloses a phased-array antenna subarray power supply circuit and an electric appliance with the power supply circuit. The circuit comprises an input connector, a protection circuit, aninput filter circuit, an input energy storage circuit, a DC converter array circuit, an output energy storage circuit and an output filter circuit. The DC converter array circuit converts a high-voltage electric signal passing through the input energy storage circuit into a low-voltage electric signal; according to the low-voltage electric signal, the output energy storage circuit meets the requirement of the phased-array antenna for instantaneous power in an array plane pulse working state, and the output filter circuit improves the quality of an output signal of the low-voltage electric signal passing through the output energy storage circuit. By means of the mode, after the high-voltage electric signals are converted into the low-voltage electric signals, assemblies on the array face of the phased-array antenna can effectively work, and the size and the weight of the phased-array antenna can be reduced.
Owner:BEIJING INST OF RADIO MEASUREMENT
Equipment for supplying hybrid power by utilizing solar energy based on multi-phase alternating method
InactiveCN107872093AReduce loadSave on electricity billsBatteries circuit arrangementsElectric powerElectricityEngineering
The invention discloses equipment for supplying the hybrid power by utilizing the solar energy based on a multi-phase alternating method. The equipment comprises a solar power generation part, a storage battery part, a power supply circuit and a power supply control part. The solar power generation part is used for generating power by utilizing the solar energy. The storage battery part is used for storing and providing the current. The power supply circuit is electrically connected with the solar power generation part and the storage battery part and comprises a load end used for consuming the electric power, and a power supply end used for generating power for daily use. The power supply control part is used for controlling a power supply and a loop and providing the current from the solar power generation part to the storage battery part / the load end / the power supply end, or from the power supply end to the storage battery part / the load end. The power supply circuit part is designedto charge / discharge the storage battery part through the multi-phase alternating method, so that the voltage is reduced or increased. According to the invention, based on the application of the multi-phase alternating method, the demand of the maximum power is reduced in the charging / discharging process of the storage battery part.
Owner:HYOSUNG POWERTEC
Airborne radar system and method for determining supercapacitor for airborne radar
ActiveCN110474414AReduce peak power requirementsReduce weightBatteries circuit arrangementsElectric powerCapacitanceRadar systems
The present application relates to a method for determining a supercapacitor for an airborne radar, the method comprising: determining the capacity of the supercapacitor; determining the pulse operation mode of the airborne radar, and determining the charging-discharging time of the supercapacitor according to the pulse operation mode of the airborne radar; and determining the parameters of the supercapacitor according to the capacity and the charging-discharging time of the supercapacitor. Compared with a method in the prior art where a generator directly supplies power to the airborne radar,the method of the application uses the supercapacitor as an energy storage device of an aircraft, and achieve a pulse-style high-power-density output by quickly charging the supercapacitor and discharging the supercapacitor with a high current, which not only complies with the use mode of the airborne air-search radar, but also can reduce the peak power requirement of an airborne generator, thereby reducing the generator weight index by about 50%. Thus, an airborne system is balanced between the weight size and the energy / power acquisition and maximizes performance.
Owner:SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
A series hybrid power system of excavator boom based on double flywheel
ActiveCN111733908BReduce peak power requirementsReduced installed power requirementsMechanical machines/dredgersGear wheelHydraulic pump
A dual-flywheel-based excavator boom series hybrid power system, the prime mover is connected to a first hydraulic pump, and the P port of the first hydraulic pump is connected to the P port of the first hydraulic motor through a first check valve; the first The hydraulic pump is sequentially connected to the second hydraulic pump through the one-way clutch, the first transmission, the first clutch, the first flywheel, the second clutch, and the second transmission; the S port and P port of the second hydraulic pump are respectively connected to the oil tank and the main reversing The P port of the valve is connected, the A port and B port of the main reversing valve are respectively connected with the rod chamber and the rodless chamber of the boom hydraulic cylinder, and the T port of the main reversing valve is connected with the P port of the second hydraulic motor. The T ports of the first hydraulic motor and the second hydraulic motor are connected to the oil tank; the second hydraulic motor is connected to the second gear through the third clutch, the second flywheel, the fourth clutch, and the third transmission in sequence; the first gear is set in the one-way clutch It is on the shaft between the first transmission and meshes with the second gear. The system can recover and reuse energy.
Owner:XUZHOU COLLEGE OF INDAL TECH
Vehicle-mounted inspection system and its power supply system, control method and power supply controller
ActiveCN106230088BConducive to lightweight designCompact designBatteries circuit arrangementsMaterial analysis using wave/particle radiationElectricityPower controller
The invention discloses a vehicle-mounted inspection system, a power supply system, a control method and a power supply controller thereof, and relates to the field of power supply control. The power supply system includes a low-power generator; a battery pack, which is used to supply power to the vehicle-mounted inspection system; a charger, which is electrically connected to the low-power generator and the battery pack; and a power controller, which is electrically connected to the battery pack and the small-power generator . The invention replaces a high-power generator with a low-power generator and a battery pack, thereby reducing the peak power requirement of the vehicle-mounted inspection system on the generator and improving power supply efficiency. In addition, the use of low-power generators and lithium battery packs instead of high-power generators is conducive to the lightweight design of the vehicle-mounted inspection system, while reducing noise and vibration, which is conducive to improving user experience and performance indicators.
Owner:TSINGHUA UNIV +1
Series hybrid power system for excavator boom
ActiveCN111733907AReduce peak power requirementsAvoid wastingHybrid vehiclesMechanical machines/dredgersHydraulic pumpFlywheel
The invention discloses a series hybrid power system for an excavator boom. An output shaft of a prime motor is connected with a transmission shaft of a hydraulic pump, a port S and a port P of the hydraulic pump are respectively connected with an oil tank and a port A of a first one-way valve, a port B of the first one-way valve is respectively connected with the port P of a hydraulic motor and the port B of a second one-way valve, and a port T of the hydraulic motor and the port A of the second one-way valve both are connected with the oil tank; the hydraulic pump is connected with a transmission shaft at one end of a flywheel through a one-way clutch, a first transmission and a first clutch, and the transmission shaft at the other end of the flywheel is connected with the transmission shaft of the hydraulic pump / motor through a second clutch and a second transmission; the port S and the port P of the hydraulic pump / motor are respectively connected with the oil tank and the port P ofa main reversing valve, the port A and the port B of the main reversing valve are respectively connected with a rod cavity and a rodless cavity of a boom hydraulic cylinder, and the port A and the port B of a third one-way valve are respectively connected with the oil tank and the rod cavity of the boom hydraulic cylinder. The system provided by the invention can recycle energy of the boom, and also can perform efficient reuse of the energy.
Owner:XUZHOU COLLEGE OF INDAL TECH
A single-degree-of-freedom active ankle prosthesis based on a closed hydraulic drive system
The invention discloses a single-degree-of-freedom active ankle prosthesis based on a closed hydraulic drive system, including a carbon fiber foot plate, a micro hydraulic pump, a hydraulic integrated block, a first accumulator, a second accumulator, and a first pressure sensor , the second pressure sensor, the third pressure sensor, the first normally closed switch valve, the second normally closed switch valve, the first normally open switch valve, the second normally open switch valve, the double rod hydraulic cylinder, the first one-way valve , the second one-way valve, the third one-way valve, the fourth one-way valve, the connecting hinge, and the ankle connecting frame; compared with the passive ankle joint prosthesis, the present invention enables the wearer to obtain a biological similarity to the human body by actively providing the driving force. The characteristic walking gait improves the wearing comfort of the amputee; in the passive mode, the shock absorption of the hydraulic cylinder can be used to provide damping; in the present invention, the continuous rotation of the motor driven by the hydraulic pump and the energy storage of the accumulator can reduce the impact on The peak power requirements of hydraulic pumps and motors, and reduce power consumption during long-term walking to improve endurance.
Owner:BEIHANG UNIV
A Synthetic Aperture Radar System Based on Transmitting and Transmitting Alternate Pulse Groups
ActiveCN103728620BReduce peak powerReduce peak power requirementsRadio wave reradiation/reflectionTransceiverSynthetic aperture radar
The invention discloses a synthetic aperture radar system based on alternating pulse group receiving and transmitting. The synthetic aperture radar system is composed of a radar comprehensive electronic unit and a data processing unit. The radar comprehensive electronic unit generates and radiates alternating pulse group radar signals and receives echo signals dispersed by surface features; the data processing unit, in real time, collects the echo signals processed by a receiver to complete the conversion from the alternating pulse group echo waves to single pulse echo signals; lastly, by means of an imaging algorithm, the radar image of a mapped region can be obtained. The synthetic aperture radar system based on alternating pulse group receiving and transmitting reduces the peak power of a transmitter, meanwhile guarantees the maximum action distance of the radar and solves the problem of saturation of near field echo signals under the condition of wide swath.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI
A hydraulic circuit for active control of prosthetic knee-ankle joint motion
ActiveCN109764011BReduce peak power requirementsReduce power consumptionServomotor componentsServomotorsHydraulic cylinderFour-way valve
The invention discloses a hydraulic circuit capable of actively controlling movement of artificial limb knee and ankle joints, and belongs to the technical field of artificial limbs and orthoses. Thehydraulic circuit specifically comprises an electromotor, a hydraulic pump, a third one-way valve, a fourth one-way valve, a first one-way valve, a second one-way valve, a third energy accumulator, afourth energy accumulator, a first energy accumulator, a second energy accumulator, a second three-position four-way valve, a first three-position four-way valve, a first normally-closed switch valve,a first damper valve, a second damper valve, a second normally-closed switch valve, a bypass damper valve, a single-output-rod hydraulic cylinder, a double-output-rod hydraulic cylinder, a knee jointoil inlet pipeline, a knee joint oil outlet pipeline, an ankle joint oil inlet pipeline, an ankle joint oil outlet pipeline, a first pipeline, a second pipeline, a third pipeline and a fourth pipeline. The hydraulic circuit capable of actively controlling the movement of the artificial limb knee and ankle joints has the characteristics that the power density is large, the output energy is large,the energy can be effectively stored by using the energy accumulators, the buffering capacity can be flexibly controlled by using the damper valves, and the performance of the artificial limbs can beimproved markedly.
Owner:BEIHANG UNIV
An active-passive combined prosthetic knee-ankle joint hydraulic circuit with energy recovery function
ActiveCN110368153BReduce peak power requirementsExtend battery lifeArtificial legsHigh energyKnee Joint
The invention discloses an active-passive combined prosthetic knee-ankle hydraulic circuit with energy recovery function, which aims to solve the problems of high energy consumption and short battery life of an active hydraulic prosthetic system. The hydraulic circuit includes a motor, a coupling and a hydraulic pump. , the first accumulator, the second accumulator, the adjustable flow valve, the knee joint hydraulic cylinder, the ankle joint hydraulic cylinder, the first three-position four-way proportional valve, the second three-position four-way proportional valve, the third three-position Four-way proportional valve, first pressure sensor, second pressure sensor, third pressure sensor, fourth pressure sensor, fifth pressure sensor, sixth pressure sensor, first pipeline and second pipeline, the present invention uses three positions The four-way proportional valve controls the accumulator to absorb and release the energy in the process of human walking. Combined with the active and passive hybrid drive mode, the energy consumption of the system is effectively reduced, and the performance of the lower limb prosthesis is significantly improved. At the same time, the structure is simple and easy to achieve lightweight.
Owner:JILIN UNIV
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