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134results about How to "Eliminate hysteresis" patented technology
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Calculation of state of charge offset using a closed integral method
InactiveUS7233128B2Eliminate hysteresisCircuit monitoring/indicationEmergency protective circuit arrangementsHysteresisBattery state of charge
Owner:FORD GLOBAL TECH LLC
Calculation of state of charge offset using a closed integral method
InactiveUS20060022643A1Eliminate hysteresisCircuit monitoring/indicationEmergency protective circuit arrangementsBattery state of chargeHysteresis
A state of charge control system and method uses a region of voltage linearity and a long-term average voltage to estimate an average battery state of charge for storage batteries and to eliminate errors due to hysteresis, drift and sensor noncompliance. An average state of charge Sn is calculated using a current integral method and an average state of charge Sv based on an average observed voltage Vn for a time period exceeding a predefined minimum time but before a predefined maximum time has elapsed is also calculated. If the absolute value of the difference between the Sv and Sn are not are within an acceptable error band, then an offset value is calculated to correct the Sn by subtracting the Sv from the Sn, and thus, to maintain a more accurate Sn. Additionally, a closed current integral method is used to reduce errors due to hysteresis.
Owner:FORD GLOBAL TECH LLC
Device and method for rehabilitation training
ActiveCN107537136AEnsure safetyImprove dynamic performanceWalking aidsMovement coordination devicesEngineeringPelvis
The invention discloses a device and a method for rehabilitation training. The device comprises a pelvis mechanism unit, a stand column support mechanism unit, a treadmill unit, and a control unit. The stand column support mechanism unit is fixed on the treadmill unit. The pelvis mechanism unit is connected with the stand column support mechanism unit and can move axially along the stand column support mechanism unit. The pelvis mechanism unit comprises a first four-rod mechanism formed by a base, a first connecting rod, a second connecting rod, and a connecting box, and a second four-rod mechanism formed by a third connecting rod, a fourth connecting rod, a first supporting arm, and a second supporting arm. The first four-rod mechanism and the second four-rod mechanism are movably connected. A method for connecting a pelvis of a patient through the pelvis mechanism provides a weight reduction function. The pelvis structure has multiple degrees of freedom, and can swing with natural swing of a pelvis when a patient walks. Weight reduction supports on a pelvis position prevent pendulum effect caused by an overhanging weight reduction method, so that a body can naturally swing when walking.
Owner:SHANGHAI ELECTRICGROUP CORP
Dual mechanical port magnetic conductance harmonic type electromagnetic gear composite permanent magnet motor
InactiveCN103378711AEliminate contact frictionImprove transmission efficiencyDynamo-electric brakes/clutchesDynamo-electric gearsPermanent magnet rotorLow speed
Provided is a dual mechanical port magnetic conductance harmonic type electromagnetic gear composite permanent magnet motor which can be widely applied to industrial transmission fields such as wind power generation, electric automobiles, ship driving and server driving. The electromagnetic gear composite permanent magnet motor is characterized is that main transmission components of the electromagnetic gear composite permanent magnet motor consists of a stator formed of a stator iron core (9) and a stator winding (8) having 2ps poles, a permanent rotor formed of a rotor iron core (17) equipped with 2pr rotor permanent magnets (18) and an output shaft (16), and a salient pole magnetic conductance wave rotor (6) having Zb salient poles, wherein a numerical difference between the number of pole-pairs ps and pr is relatively small; and the stator, the permanent magnet rotor and the salient pole magnetic conductance wave rotor (6) are coaxially disposed, are mutually coupled through a radial air-gap magnetic field, and are mutually coupled in a salient pole straight axis area of the high-speed rotating salient pole magnetic conductance wave rotor (6) by using a principle of heteropolarity magnetic field attraction with a small pole difference so as to drive the permanent magnet rotor with a small pole difference to rotate at a low speed. Therefore, power speed changed and torque conversion controlled drive with no mechanical contact and no friction is realized.
Owner:余虹锦
Novel free layer design for TMR/CPP device
InactiveUS20090121710A1Free layerReduce componentsManufacture of electrical instrumentsSemiconductor/solid-state device manufacturingHysteresisNon magnetic
A TMR sensor and a CPP GMR sensor all include a free layer that is of the form CoFexBy / non-magnetic layer / NiFez or of the form CoFe / CoFeB / non-magnetic layer / NiFe, where, in one embodiment, the thickness of the non-magnetic layer is less than approximately 15 angstroms and the atom percentage x, z of Fe can vary between 0 and 70% for x and 0 and 100% for z and the atom percentage, y, of B can vary between 0 and 30%. This arrangement can produce a 5-10% improvement in dR / R and can allow the coupling field between the CoFeB and the NiFe to be strong enough that an in-stack biasing of the CoFeB layer occurs and the hysteresis behavior and stability of the sensor is improved.
Owner:HEADWAY TECH INC
Piezoelectric ceramic driving power supply and driving method
InactiveCN102420541AEliminate hysteresisImprove Linear Control AccuracyPiezoelectric/electrostriction/magnetostriction machinesDc-dc conversionHysteresisElectricity
The invention discloses a piezoelectric ceramic driving power supply and a driving method. The piezoelectric ceramic driving power supply comprises a pulse width modulation (PWM) driving module, an output stage circuit and a feedback closed loop circuit, wherein the feedback closed loop circuit comprises a voltage feedback closed loop circuit and a current feedback closed loop circuit. The displacement of piezoelectric ceramics and the quantity of electric charges on the piezoelectric ceramics are in linear relation, namely the displacement of the piezoelectric ceramics and current flowing through the piezoelectric ceramics are in the linear relation; however, the displacement of the piezoelectric ceramics and voltage on the piezoelectric ceramics are in nonlinear relation. In the piezoelectric ceramic driving power supply and the driving method in the embodiment of the invention, the current feedback closed loop circuit is arranged, and the voltage feedback closed loop circuit and the current feedback closed loop circuit control a voltage signal output by the piezoelectric ceramic driving power supply according to a voltage signal and a current signal on the piezoelectric ceramics, thereby avoiding hysteresis and improving linear control accuracy.
Owner:SUZHOU UNIV
Magnetoresistive sensor arrangement for current measurement
ActiveUS20110121828A1Eliminate offsetEliminate hysteresisNanomagnetismElectrical measurementsElectrical conductorElectrical current
A sensor unit for the measurement of a current in a conductor (1) comprising at least one magnetoresistive sensor (5, 6) located at a radial distance from the outer surface of the conductor (1) is disclosed, wherein the conductor (1) has a circular cross-section, and wherein it comprises at least one auxiliary coil (7) for the generation of a bias magnetic field (Hbias) to the magnetoresistive sensor (5, 6) strong enough for inducing magnetic saturation in the magnetoresistive sensor (5, 6) continuously during the whole current measurement process. Further the use of such a sensor and a method for measuring the current in the conductor using such a sensor unit are disclosed.
Owner:ABB (SCHWEIZ) AG
Display driving method, display panel and display device
ActiveCN104505024AEliminate hysteresisThe characteristic curve returns to normalStatic indicating devicesHysteresisElectricity
The invention provides a display driving method, a display panel and a display device, solving a problem that the abnormality of displaying a picture of an OLED (Organic Light-Emitting Diode) display is caused by the hysteresis effect of a driving transistor when an OLED display panel is powered off and is electrified again. The method comprises the steps: within the present duration after the electrification of the display panel, controlling the on-off of a transistor for lighting up an organic LED driven by a pixel compensation circuit in the pixel compensation circuit, controlling the switch-on of the driving transistor in the pixel compensation circuit and enabling electricity current to run between the source electrode and the drain electrode of the driving transistor; within the present duration after the electrification of the display panel, controlling the pixel compensation circuit to drive the organic LED to emit light according to received data signals, wherein the preset duration is not smaller than the time duration of displaying a picture frame by the display panel.
Owner:WUHAN TIANMA MICRO ELECTRONICS CO LTD +1
Method for automatically capturing microball in optical tweezer system
ActiveCN106485204APrevent double captureReduce workloadMicroscopic object acquisitionMicrosphereClosed loop
The invention relates to a method for automatically capturing a microball in an optical tweezer system. The method comprises the steps of setting an initial image background; presetting a path, and controlling a micron displacement table to perform a search according to the path; processing each frame of image, and when the microball exists in a view field, outputting the position, the diameter and an ID feature of the microball; after the feature of the microball in the view field is obtained, interrupting the search path to generate a capture path, and performing PI closed-loop control on particles according to a planned path until the particles are successfully captured, otherwise, returning to the search path again for performing the search; judging whether the particles are successfully captured or not; and when other excess particles occur near the captured particles, generating an avoidance path. According to the method, the microball capture efficiency can be greatly improved.
Owner:TIANJIN UNIV
Minimally invasive surgical wire driving and four-freedom surgical tool
ActiveCN101637402BRealize long-distance transmissionEliminate hysteresisSuture equipmentsInternal osteosythesisDrive wheelEngineering
The invention discloses a minimally invasive surgical wire driving and four-freedom surgical tool which comprises a tool connecting rod, wherein one end of the tool connecting rod is connected with the tail end of the tool, and the tail end of the tool comprises a main tool body; the rear end of the main tool body is connected with a main body driving wheel; the front end of the tool connecting rod is provided with a rear shaft pin; both sides of the rear shaft pin are respectively provided with two rear driving wheels which are connected with the main tool body of the tail end of the tool through the main body driving wheel in the middle of the two rear driving wheels; the middle part of the main tool body is provided with two middle driving shafts with middle driving wheels; the front end of the main tool body is provided with a front shaft pin which is connected with a tool pliers body through two pliers body driving wheels arranged on the tool pliers body; each pliers body drivingwheel is fixedly connected with one end of a front wire rope and divides the front wire rope into two parts, and one part is turned for one time, while the other part is turned for two time through the middle wheels. The tool realizes long-distance driving by adopting the wire rope, thereby eliminating return differences and guaranteeing reliable driving.
Owner:SHANDONG WEIGAO SURGICAL ROBOT CO LTD
Minitype airborne high-precision low cost single-degree-of-freedom photo-electricity stabiliser
InactiveCN101226392AAvoid volumeLower performance requirementsNavigation by speed/acceleration measurementsControl using feedbackReduction driveWireless image transmission
The invention relates to a small airborne high precision low cost single freedom photoelectric stabilizer which is composed of a control computer, a carrier inertia measurer, a CCD camera, a small direct current deceleration servo motor, a wireless image and data transmission system and a ground control station. The control computer according to the speed and position information provided by the carrier inertia measurer and navigation system can calculate the speed command of the camera optical axis and controls the direct-current deceleration servo motor to operate relatively, to half-strapdown stabilization of the optical axis, the camera uses spring preload to control, which can eliminate the gear backlash of decelerator, the wireless image transmission system can transmit the detected image to the ground control station, and ground control user can use the wireless image and data transmission system and the control computer to control the CCD camera accoriding to the image information. The invention has simple structure, small volume, low weight, low cost and high precision, which is suitable for the research of small unmanned aerial vehicle photoelectric system.
Owner:BEIHANG UNIV
Flexible low-voltage organic field effect transistor and manufacturing method thereof
InactiveCN105336860AGood electrical propertiesImprove mobilitySolid-state devicesSemiconductor/solid-state device manufacturingOrganic field-effect transistorLow voltage
The invention discloses a flexible low-voltage organic field effect transistor and a manufacturing method thereof. Three layers of polymers are added between a gate and a semiconductor layer interface to serve as an insulated layer; the overall device comprises a source and drain electrode, a semiconductor, a high-insulation polymer, a high-dielectric constant material polymer, a high-insulation polymer, a gate, and a flexible transparent plastic substrate sequentially from top to bottom; and the dielectric layer with the structure has excellent insulation and good stability. Through measuring electrical properties and a semiconductor particle growth shape, whether the device is a flexible low-voltage organic field effect transistor can be judged. The organic field effect transistor has the advantages of realizing high mobility and large switch ratio under low voltage, maintaining good performance when bias voltage is applied and in a high temperature condition, and having good stability features in different bending modes.
Owner:NANJING UNIV OF POSTS & TELECOMM
Developing device and image forming apparatus
ActiveUS20080226350A1Efficient collectionImprove chargeabilityElectrographic process apparatusLatent imageDevice form
To provide a developing device capable of preventing the hysteresis phenomenon. The developer of the developing device contains a toner and a carrier. The toner and the carrier are charged to a polarity different from each other by frictional contact thereof. The developing device has a first conveyance member and a second conveyance member which faces an electrostatic latent image bearing body via the second region. An electric field forming device forms a first electric field between the first conveyance member and the second conveyance member to move the toner in the developer retained by the first conveyance member to the second conveyance member, and forms a second electric field between the second conveyance member and the electrostatic latent image bearing body to move the toner retained by the second conveyance member to an electrostatic latent image of the electrostatic latent image bearing body. The first electric field is an oscillating electric field having both a function to supply the toner to the second conveyance member and a function to collect the toner from the second conveyance member while a time average field strength is biased to a side where the toner is supplied from the first conveyance member to the second conveyance member, and a time ratio for carrying out the function to collect the toner from the second conveyance member to the first conveyance member is 60 to 80%.
Owner:KONICA MINOLTA BUSINESS TECH INC
Dynamic illumination control for laser projection display
InactiveUS20110134344A1Improve image contrastMinimize stray lightTelevision system detailsCharacter and pattern recognitionImage contrastLightness
A method for improving image contrast for a display apparatus obtains a frame of image data having one or more code values for each pixel in the frame of image data, analyzes the frame of image data to identify a distribution of dark regions therein. The method further adjusts at least one of the one or more code values for the frame of image data according to the distribution of dark regions in the frame of image data and attenuates a brightness level available for the image frame according to the distribution of dark regions in the frame of image data.
Owner:EASTMAN KODAK CO
Small-range magnetic conductance harmonic type magnetic gear pair of radial magnetic field
InactiveCN102611280AEliminate contact frictionIn line with the characteristics of low-carbon environmental protection economyDynamo-electric brakes/clutchesDynamo-electric gearsLow speedEngineering
The invention provides a small-range magnetic conductance harmonic type magnetic gear pair of a radial magnetic field. The magnetic gear pair can be widely applied to such industrial transmission fields as wind power generation, electric automobiles, ship drive and the like. The magnetic gear pair is characterized in that the magnetic gear pair comprises a permanently magnetic stator consisting of a stator core 6 and 2ps stator permanent magnets 7, a permanently magnetic rotor provided with 2pr rotor permanent magnets 8 and a salient pole type permeance wave rotor 5 with Zb salient pole waves; the numbers of pole pairs ps and pr are small in difference, and the pole pairs ps and pr are relatively prime; the permanently magnetic stator, the permanently magnetic rotor and the salient pole type permeance wave rotor 5 are coaxially mounted, and coupled with each other by a radial air-gap field; the permanently magnetic stator, and the permanently magnetic rotor and the salient pole type permeance wave rotor 5 are coupled in a salient pole direct-axis area of the salient pole type permeance wave rotor 5 which is rotated at the high speed based on the principle of attracting of a small-range heteropolarity magnetic field, so that the small-range magnetic gear pair is driven to rotate at the low speed, and the power transmission under the variable speed and torque can be achieved without mechanical touch and friction.
Owner:余虹锦
Travel trailer synchronous following braking control method considering delay characteristic of electromagnetic braking system
ActiveCN107953872AEliminate hysteresisScientific and reasonable theoretical basisBraking action transmissionAutomatic initiationsBrake torqueMotor home
The invention discloses a travel trailer synchronous following braking control method considering a delay characteristic of an electromagnetic braking system. Firstly whether a main car brake signal lamp is powered on or not is detected, if not, an electromagnetic brake is maintained to be switched off, if yes, a pre-braking torque signal is output to conduct pre-braking on a motor home; a main car braking deceleration is further detected, a following deceleration of the motor home is previewed and estimated according to the main car braking deceleration, a corresponding control signal is output to the electromagnetic brake, and thus braking operation of the motor home is achieved; and when the motor home is subjected to braking, the situation of switched on / off of the main car braking signal is synchronously monitored, and a following braking torque in the next moment is detected and previewed continuously, till the main car braking signal is cleared. The travel trailer synchronousfollowing braking control method can preview the main car braking deceleration in advance, and maximally overcomes the delay influence of the braking system so that the deceleration of the motor homecan be maintained to be consistent with that of a main car in real time, and accordingly more stable braking is achieved.
Owner:JIANGSU UNIV
Piezoelectric ceramic actuator control method based on particle swarm algorithm
ActiveCN108696176AEliminate hysteresisHigh positioning accuracyPiezoelectric/electrostriction/magnetostriction machinesHysteresisOptimal control
Provided by the invention is a piezoelectric ceramic actuator control method based on a particle swarm algorithm. The method comprises: S1, mathematic modeling is carried out on a piezoelectric ceramic actuator by using an electromechanical coupling nonlinear total parameter dynamical model to obtain a dynamical model of the piezoelectric ceramic actuator; S2, on the basis of a pseudo-spectral method, the dynamical model of the piezoelectric ceramic actuator is processed discretely and an optimal control problem is transformed into a nonlinear planning problem; S3, a fitness function of the particle swarm algorithm is obtained based on the nonlinear planning problem; and S4, the fitness function is solved by using the particle swarm algorithm to obtain a global optimal solution. Therefore,the hysteresis characteristic of the piezoelectric ceramic actuator is eliminated and the positioning accuracy of the piezoelectric ceramic actuator is improved.
Owner:GUANGDONG UNIV OF TECH
Driving circuit of magnetic field sensor based on amorphous filler metal and application method of driving circuit
ActiveCN104459571AEliminate hysteresisImprove signal-to-noise ratioMagnitude/direction of magnetic fieldsField-effect transistorConductor Coil
The invention discloses a driving circuit of a magnetic field sensor based on amorphous filler metal and an application method of the driving circuit. The driving circuit comprises a magnetic core motivation portion, a magnetic core replacement portion, a signal sampling and amplifying portion and a power source portion. A symmetric difference sampling circuit structure is adopted, and the charge injection effect brought by an analogue switch or a field effect transistor is eliminated. A current is exerted in metal receiving coils to replace magnetic cores, and therefore the magnetic-lag of the magnetic cores is removed; the even number of series-connection magnetic cores and a metal receiving coil structure in a symmetric winding manner are adopted, and therefore the inductive coupling effect between the magnetic cores and the receiving coils is eliminated, and the capacitive coupling effect of motivation current on the metal receiving coils is reduced, so that the signal-to-noise ratio and the linearity of output signals of the sensor are improved; each magnetic core is segmented into a plurality of isometric small segments, and the magnetic field detection range and the magnetic field sensitivity of the sensor can be conveniently controlled.
Owner:HEBERSON TECH (SHENZHEN) CO LTD
Method for promoting accuracy of preset position of dome camera
InactiveCN102566602AHigh precisionEliminate hysteresisTelevision system detailsColor television detailsProgrammable read-only memoryMechanical engineering
The invention relates to a method for promoting the accuracy of a preset position of a dome camera, which comprises the following steps: when a user stores a preset position, a microprocessor MCU (Microprogrammed Control Unit) simultaneously stores a movement direction of the dome camera at the time into an EEPROM (Electrically Erasable Programmable Read-Only Memory); and when the user calls the preset position, the microprocessor MCU calls the preset movement direction of the dome camera from the EEPROM, compares the preset movement direction of the dome camera with a currently actual movement direction of the dome camera, does not carry out correction if the preset movement direction of the dome camera is the same with the currently actual movement direction of the dome camera, and carries out compensation and correction if the preset movement direction of the dome camera is opposite to the currently actual movement direction of the dome camera. The return difference generated when the dome camera moves inversely is eliminated and the accuracy of the preset position of the dome camera is improved, so that the dome camera works more accurately.
Owner:TIANJIN TIANDY DIGITAL TECH
Hysteresis compensated force sensing device and method
InactiveUS20180245994A1Eliminate biasEliminate hysteresisForce measurement by measuring magnetic property varationWork measurementEngineeringHysteresis
A sensor device is for measuring forces applied to an object to be sensed. The sensor device, includes a magnetic field generating element, a magnetic field sensing element, a driving unit being adapted to drive the magnetic field generating element with a first and second driving signal having a first and second frequency, and an evaluation unit. The sensor device is able of compensating a hysteresis of the object to be sensed.
Owner:TORQUE & MORE TAM
Closed-loop-controlled encapsulating piezoelectric ceramic actuator and resistance strain gauge fixing method
ActiveCN103595292AEliminate hysteresisEliminate creepPiezoelectric/electrostriction/magnetostriction machinesClosed loopActuator
The invention discloses a closed-loop-controlled encapsulating piezoelectric ceramic actuator and a resistance strain gauge fixing method. Resistance strain gauges are arranged on the planes of the two opposite sides of piezoelectric ceramic so that nonlinear characteristics such as lag and creepage of the piezoelectric ceramic in the process of displacement output can be effectively eliminated. Consequently, the normal displacement output of the piezoelectric ceramic is guaranteed, and output accuracy is improved. Meanwhile, the displacement output amount can be fed back through the resistance strain gauges, so that closed loop control is achieved, and the actuator is simple and compact in overall structure and small in size. Due to the fact that the piezoelectric ceramic is arranged inside a stainless steel sleeve, the stainless steel sleeve is capable of effectively protecting the piezoelectric ceramic against external vibration, impact, inertia force and the like so as to improve reliability, stability and installability of the piezoelectric ceramic and ensure the service life of the piezoelectric ceramic.
Owner:苏州迈客荣自动化技术有限公司
Distributed output feedback asymptotic consistency control method for multi-agent hysteresis system
ActiveCN113359445AAvoiding the "Differential Explosion" ProblemGuaranteed stabilityTotal factory controlAdaptive controlNonlinear filterControl signal
The invention discloses a distributed output feedback asymptotic consistency control method for a multi-agent hysteresis system. The method comprises the following steps: tracking a consistency error of a reference signal track and an actual track in real time; inputting the consistency error of the reference signal track and the actual track into a dynamic surface controller containing a nonlinear filter; using the actual control signal output by the dynamic surface controller as the input of the hysteresis model, and controlling the multi-agent system according to the output of the hysteresis model; performing online real-time estimation on an unknown state of the multi-agent system by using a state observer with dynamic high gain; and inputting the state estimation value of the multi-agent system into the dynamic surface controller, and updating the parameter estimation value on line by combining the adaptive rate estimated by the internal parameters of the controller, thereby realizing distributed output feedback asymptotically consistent control of the multi-agent system. The method of the invention can effectively eliminate the hysteresis effect of the execution mechanism and realize good tracking control performance, and has great application prospects.
Owner:SHANGHAI UNIV OF ENG SCI
Driving circuit and driving method for improving scanning accuracy of YIG (yttrium iron garnet) filter
ActiveCN103647525AEliminate hysteresisShorten the timeContinuous tuning detailsHysteresisEngineering
The invention provides a driving circuit and a driving method for improving scanning accuracy of a YIG (yttrium iron garnet) filter. According to the method, a nonlinear tuning curve of a whole scanning frequency band is simulated in a segmentation fitting mode, the whole scanning frequency band is divided into a plurality of small bands, a tuning curve is linear in each small band, and the gradient and the intercept of the tuning curve can be dynamically compensated and corrected in real time according to scanning widths and scanning speeds, so that the scanning accuracy of the YIG filter is improved. By the aid of the scheme, the tuning curve of the YIG tuned filter at different frequencies, different scanning widths and different scanning speeds can be obtained, the scanning process includes calling and real-time dynamic compensation and correction of corresponding DAC (digital-to-analog converter) values under synchronization of count pulse, various software algorithms for eliminating the hysteresis effect of the YIG filter are omitted, so that time is effectively shortened, and the scanning accuracy is improved.
Owner:CHINA ELECTRONIS TECH INSTR CO LTD
Test device and method for improving transient response through mixed turbocharged waste heat
PendingCN106979066AIncrease intake chargeImprove transient insufficiencyInternal combustion piston enginesExhaust apparatusImpellerAutomotive engineering
Owner:FUZHOU UNIVERSITY
Small-range magnetic-conductive harmonic magnetic gear pair of axial planar magnetic field
InactiveCN102857069ATo achieve technical and economic effectEliminate contact frictionDynamo-electric gearsElectric machinesPermanent magnet rotorTorque transmission
The invention relates to a small-range magnetic-conductive harmonic magnetic gear pair of an axial planar magnetic field, which can be widely applied to the industrial transmission fields of wind power generation, electric vehicles, ship driving and the like and is characterized in that the magnetic-conductive harmonic magnetic gear pair comprises a permanent-magnet stator plate with 2ps stator permanent magnets 2, a permanent-magnet rotor plate with 2pr rotor permanent magnets 6 and a magnetic-conductive wave rotor plate 3 of which the number of projecting-pole is Zb; the numbers of pole pairs ps and pr are positive integer pairs which are mutually relatively prime to form the low polar differential with a fixed difference; the permanent-magnet stator plate, the permanent-magnet rotor plate and the projecting-pole magnetic-conductive wave rotor plate 3 are sequentially coaxially distributed in the axial direction and are coupled with one another through an axial planar gas gap magnetic field, and mutually coupled in the projecting-pole straight shaft area of the projecting-pole magnetic-conductive wave rotor plate rotating at a high speed according to the principle that small-range heteropolar magnetic fields are mutually attracted, so as to drive the small-range magnetic gear pair to rotate at a low speed, so that the power variable-speed and variable-torque transmission is free of mechanical touch and friction.
Owner:余虹锦
Semi joint point judgment method and system of hydraulic automatic transmission clutch
ActiveCN107504171AEliminates solenoid hysteresisReduce filling timeClutchesGearing controlVariatorPressure response
The invention provides a semi joint point judgment method of a hydraulic automatic transmission clutch. The method includes the steps that when a gear shifting requirement is detected, oil is inflated into a clutch with large pressure P1, and the actual clutch pressure and the turbine rotating speed change rate values at all moments are recorded; when the actual clutch pressure slowly rises along with time, the clutch pressure is reduced to P2, and oil inflation is continuously carried out; when the actual oil pressure reaches the preset scale value of P2, the P2 is gradually increased with delta P, and when the turbine rotating speed change rate becomes a negative value, the clutch pressure at the time is recorded and is semi joint point pressure. The invention further provides a semi joint point judgment system of the hydraulic automatic transmission clutch. By means of the semi joint point judgment method of the hydraulic automatic transmission clutch, quick and accurate pressure response in the clutch oil inflation process can be achieved, and impact caused by clutch pressure overshooting can be avoided.
Owner:CHINA FIRST AUTOMOBILE
Pixel structure, driving method thereof and display device
InactiveCN108806601AEliminate hysteresisQuick responseStatic indicating devicesSolid-state devicesCapacitanceHysteresis
The invention provides a pixel structure, a driving method thereof and a display device. The pixel structure comprises an LED (light emitting diode), a drive transistor, a memory capacitor, a data receiving unit, a first switch unit, a second switch unit, a first compensation unit and a second compensation; or the pixel structure comprises an LED, a drive transistor, a memory capacitor, a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor and a fifth switching transistor. According to the scheme, the hysteresis effect of the drive transistor can be eliminated, the response speed is increased, uneven brightness caused by threshold voltage shift of the drive transistor can be avoided, and IR pressure drop of a power line canbe compensated, so that display brightness evenness and stability of the display device are improved greatly.
Owner:KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
Electronic-control anti-backlash gear pair
ActiveCN104295708AEliminate backlashEliminate hysteresisPortable liftingGearing elementsElectricityGear wheel
The invention discloses an electronic-control anti-backlash gear pair. The electronic-control anti-backlash gear pair comprises a first gear, a second gear and a third gear. The second gear and the third gear are coaxial and parallel and are meshed with the first gear, and the freedom degree of relative rotation in the circumferential direction exists between the second gear and the third gear. The electronic-control anti-backlash gear pair further comprises an electronic-control anti-backlash system composed of an electronic driving block and a control unit, wherein the electronic driving block is used for driving the second gear and the third gear to relatively rotate to eliminate meshed backlash between the second gear and the first gear and between the third gear and the first gear during electronic deformation. According to the electronic-control anti-backlash gear pair, when the backlash needs to be adjusted, electronic deformation materials are electrified to be deformed, a double gear formed by the second gear and the third gear relatively rotates to eliminate the backlash between the second gear and the first gear meshed with the second gear and between the third gear and the first gear meshed with the third gear, the gear backlash and the return difference can be accordingly eliminated or reduced in real time, cost is low, the structure is simple, accessory equipment such as a motor is not needed, the occupied space is small, driving energy is reduced, the transmission error during direction changing is reduced, and operation and control are simpler and more convenient; as the original mode that the backlash is eliminated through mechanical force of a power source is not adopted, controllability and accuracy are high, and the electronic-control anti-backlash gear pair is suitable for occasions with the requirements for the high accuracy.
Owner:CHONGQING UNIV
Intelligent dewatering wells for reservoir landslide and intelligent dewatering prevention method for reservoir landslide
ActiveCN108166477AReduce distortionEliminate hysteresisClimate change adaptationCoastlines protectionHysteresisLandslide
The invention discloses intelligent dewatering wells for reservoir landslide and an intelligent dewatering prevention method for reservoir landslide. Each intelligent dewatering well is composed of adewatering well and an intelligent control system, and the intelligent dewatering wells and arc-shaped drainage ditches are uniformly distributed in a landslide mass influenced by underground water level fluctuation; the intelligent dewatering wells go deep into the positions below the sliding surface of the landslide mass, the landslide mass underground water level and the reservoir water level are declined synchronously by intelligently controlling a submerged pump to pump water, the landslide mass underground water level is quickly declined while the reservoir water level falls, the landslide mass underground water level is declined to the position below the sliding surface or equal to the lowest reservoir water level, the underground water hysteresis effect is eliminated, and the innerdynamic water pressure effect of the landslide mass is reduced. According to the intelligent dewatering wells for reservoir landslide and the intelligent dewatering prevention method for reservoir landslide, implementation is easy and convenient, the efficiency is high, the cost is low, underground water in the landslide mass can be efficiently and automatically pumped, the water head differencebetween the landslide mass underground water level and the reservoir water level is intelligently controlled, the adverse impact of reservoir water level falling on landslide is reduced, and accordingly, the stability of the reservoir landslide mass is improved effectively.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
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