127results about How to "Small lag" patented technology

A field effect transistor includes a channel layer 11, a source electrode 13, a drain electrode 14, a gate insulation layer 12 and a gate electrode 15 formed on a substrate 10. The channel layer is made of an amorphous oxide and that the gate insulation layer is made of an amorphous oxide containing Y.

The invention discloses a self-propelled automatically targeting precise pesticide spraying machine, which comprises a walking device, wherein the rear end on the top of the walking device is provided with a pesticide spraying device, and the front end on the top of the walking device is provided with an ultrasonic detector; solenoid valves on a pipeline of the pesticide spraying device are connected to an embedded control platform; the ultrasonic detector mainly comprises an ultrasonic sensor; detection signal output of the ultrasonic detector is connected to the embedded control platform; the self-propelled automatically targeting precise pesticide spraying machine also can comprise a pesticide spraying signal detection control device; the self-propelled automatically targeting precise pesticide spraying machine comprises the solenoid valves, velocity sensors, a flow sensor, a pressure sensor and an electric ball valve; and the embedded control platform integrate signals of the sensors to control the on / off of the solenoid valves. The self-propelled automatically targeting precise pesticide spraying machine can automatically detect whether fruit trees are present in front of the machine and automatically spray a pesticide in a targeted way according to shapes of the fruit trees, so that the utilization rate of the liquid medicine is improved, the harm of the chemical pesticide to the safety of an operator is reduced and the pollution of the pesticide to the environment is reduced.

The invention relates to a float type level gauge for on-site indication, which comprises a float, a graduated scale and a noctilucence wheel, and is characterized by further comprising a conducting or magnetic conducting guide rail, wherein the noctilucence wheel comprises an insulating box, a light source, two longitudinally arranged magnetic shafts or metal shafts, and two conducting wires for supplying power to the light source; for a magnetic float type level gauge, the noctilucence wheel also comprises a steel magnet; under the magnetic action, the magnetic shafts or the metal shafts, along with upward and downward movements of the float, move upwards and downwards along the guide rail so as to indicate the liquid level on-site accurately in time; or a resistance wire is enwound on the guide rail, and the resistance value of a conducting loop comprising the guide rail, the magnetic shafts or the metal shafts, the conducting wire, the light source and the like is measured to acquire a corresponding liquid level value so as to achieve the continuous long-distance transmission of liquid level data. The float type level gauge can also comprise a pulley wheel, a counterbalance, a connecting rope or a connecting belt to balance the noctilucence wheel. The float type level gauge has the significant characteristics of simple structure, clear and obvious on-site indication, flexible and accurate measurement and continuous long-distance signals.

A stent and a delivery system for implanting the stent in a body lumen is disclosed. The stent is made from a superelastic alloy such as nickel-titanium or nitinol, and includes a ternary element in order to minimize the stress hysteresis of the superelastic material. The stress hysteresis is defined by the difference between the loading plateau stress and the unloading plateau stress of the superelastic material. The resulting delivery system has a small profile and includes a sheath covering the stent that has a thin wall. A guide wire core can also be made from the small stress hysteresis superelastic material.

The invention discloses a trajectory tracking control method of an underwater inspection robot. The method comprises the following steps: (1) presetting a reference trajectory for trajectory trackingof the underwater inspection robot, obtaining an optimal path from a starting point to a target point by using a navigation path planning algorithm according to the reference trajectory, and taking the optimal path as a preset reference trajectory of trajectory tracking of the robot; (2) designing a trajectory tracking kinematic controller in combination with the reference trajectory and a kinematic model; (3) carrying out stress analysis on the underwater inspection robot, establishing a dynamic model, and designing a trajectory tracking dynamic controller; and (4) taking a control value of the kinematic controller as input of the dynamic controller to obtain a thrust and a torque required by trajectory tracking, and realizing smooth and stable trajectory tracking control of the underwater inspection robot. By designing a dynamic target function, a problem of speed jump is solved, a lag between an actual trajectory and the reference trajectory is reduced, the shortest tracking step length optimization function item is added into the target function, the path length of the actual trajectory is reduced, and then trajectory tracking energy consumption is decreased; in addition, the influence of the actual underwater environment on trajectory tracking is also considered, and finally smooth and stable trajectory tracking control is realized.

The invention relates to a clock domain crossing controller of a digital control switch power supply and a control method thereof. The controller comprises a potential-divider network, a analog to digital converter, a digital compensator, a digital pulse modulation circuit, a drive circuit and a clock logic circuit, wherein after data at the output end of a switching power supply is acquired, a voltage control signal of the switching power supply is output through carrying out sequential processing on the data by all modules, and the clock logic circuit provides a working clock of the controller. The invention adopts a system structure of synchronous clock two-edge trigger, overcomes the data delay steady state introduced by the clock single-edge trigger, and is used for optimizing the system data processing part on the basis of maintaining the advantages of the common digital control, thereby reducing the control signal hysteresis in the system, realizing a real-time data control system, cutting off the work of the forestage module after the synchronous clock pulse is ended, and saving the system power consumption.

The invention discloses a method for achieving a multi-message queue mechanism to improve performance in a single process, and belongs to the technical field of an operation system of a mobile terminal. The method is mainly characterized by comprising the following steps of: changing a manufacturing method of a single-thread single-message queue, increasing the message queue of a single thread, and dividing the priority level among a plurality of message queues; storing the received response message into different priority levels of message queues according to the emergency degree; and processing the message queues according to the order of the priority levels, so as to achieve intelligent treatment of messages. By adopting the method, the original message circulating mechanism of an Android system is optimized; delay and lag of operating the Android system by a user can be reduced; the response speed of the user is improved; and the operating performance of the system is ensured.

The invention discloses an automobile four-wheel active steering control system which comprises a driver preset steering detecting device, an actual steering detecting device and an electronic control unit, wherein the driver preset steering detecting device is used for detecting the preset steering state of the driver in real time; the actual steering detecting device is used for detecting the actual steering state of the automobile in real time; the electronic control unit is used for analyzing and comparing detected signals of the driver preset steering detecting device and the actual steering detecting device and correspondingly controlling a front wheel steering controller and a rear wheel steering controller; and the driver preset steering detecting device and the actual steering detecting device are both connected with the electronic control unit. The automobile four-wheel active steering control system has reasonable design, is easy and convenient to use and operate and can effectively improve the controllability problem of the four-wheel steering automobile during turning, thereby greatly improving the safety of the automobile during meeting, overtaking and curve running.

The invention relates to an improved fast steering mirror (FSM) inertial stability control method based on strapdown acceleration measurement. The method achieves strapdown direct disturbance measurement by using a disturbance measurement accelerometer mounted on a base and then performs feedforward compensation control by using the measured disturbance acceleration. A disturbance measuring sensor is mounted directly on a FSM base so that the model selection of the sensor is not limited. Any sensor with high precision and high bandwidth can be used without being limited by volume and installation space. The obtained base disturbance is high in accuracy and low in lag. In order to avoid system saturation caused by double saturation in a feedforward controller, feedforward nodes are selected when an acceleration loop is given and a speed controller is output. The method ingeniously subjects the quadratic differential in a controlled object to partial compensation by using an acceleration controller so as to simplify a feedforward compensation object, thereby simplifying the design of a feedforward controller, and making the entire control loop simpler and easier to implement.

To provide a gate insulating material which has high chemical resistance, is superior in coatability of a resist and an organic semiconductor coating liquid, and has small hysteresis, a gate insulating film and an FET using the same by a polysiloxane having an epoxy group-containing silane compound as a copolymerization component.A gate insulating material containing a polysiloxane having, as copolymerization components, at least a silane compound represented by the general formula (1):R1mSi(OR2)4-m  (1),wherein R1 represents hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an aryl group, a heteroaryl group or an alkenyl group and in the case where a plurality of R1s are present, R1s may be the same or different, R2 represents an alkyl group or a cycloalkyl group and in the case where a plurality of R2s are present, R2s may be the same or different, and m represents an integer of 1 to 3,and an epoxy group-containing silane compound represented by the general formula (2):R3nR4lSi(OR5)4-n-1  (2),wherein R3 represents an alkyl group or a cycloalkyl group having one or more epoxy groups in a part of a chain and in the case where a plurality of R3s are present, R3s may be the same or different, R4 represents hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an aryl group, a heteroaryl group or an alkenyl group and in the case where a plurality of R4s are present, R4s may be the same or different, R5 represents an alkyl group or a cycloalkyl group and in the case where a plurality of R5s are present, R5s may be the same or different, l represents an integer of 0 to 2, and n represents 1 or 2 (however, l+n≦3).

A single-segment drive scheme for an electronic paper display (EPD) is replaced by a multiplexed drive scheme that reduces the number of driver pins to the number of display segments per digit or alphanumeric character plus one input / output (I / O) line per digit or alphanumeric character. In accordance with the invention, a passive digit selection mechanism enables a multiplex display drive scheme when the EPD material used typically has a stable threshold combined with a small hysteresis. Typically, display operation is better the smaller the hysteresis and the more stable the threshold of the EPD material that is used.

A CPP type magnetic sensing element capable of properly performing magnetization control of a free magnetic layer and having small hysteresis and an excellent playback characteristic, as well as a manufacturing method therefor, are provided. Second antiferromagnetic layers are provided not only on both edge sections of the free magnetic layer, but also on the middle rear end. In the height-side edge of the middle front end of the aforementioned free magnetic layer, a sense current magnetic field in the direction opposite to the magnetization direction of the aforementioned free magnetic layer is cancelled by a bias magnetic field from the second antiferromagnetic layer provided on the middle rear end. Consequently, an influence of the aforementioned sense current magnetic field can be reduced, turbulence in the magnetization of the aforementioned free magnetic layer can be made smaller than ever, and a magnetic sensing element having small hysteresis can be manufactured.

For forming an annular magnetostrictive coat on an outer peripheral surface of a rotational shaft associated with a magnetostrictive torque sensor, a magnetostrictive-coat forming method comprises a step of fitting a cylindrical masking jig over the outer peripheral surface of the rotational shaft and securing the masking jig to the outer peripheral surface, a step of placing the rotational shaft in a plating tank to thereby form the magnetostrictive coat by plating on the outer peripheral surface, and a step of detaching the masking jig from the rotational shaft.

A stent and a delivery system for implanting the stent in a body lumen is disclosed. The stent is made from a superelastic alloy such as nickel-titanium or nitinol, and includes a ternary element in order to minimize the stress hysteresis of the superelastic material. The stress hysteresis is defined by the difference between the loading plateau stress and the unloading plateau stress of the superelastic material. The resulting delivery system has a small profile and includes a sheath covering the stent that has a thin wall.

The invention discloses super-hydrophobic coating material and a preparation method thereof, and discloses a super-hydrophobic coating and a preparation method thereof. The super-hydrophobic coating material is prepared from the following raw material components in parts by mass: 10-30 parts of a curing agent, 10-30 parts of epoxy resin, 80-120 parts of polytetrafluoroethylene powder, 0-10 parts of fluoropolymer, 10-30 parts of zinc oxide and 40-80 parts of a solvent, wherein the curing agent is prepared by carrying out a fluorination reaction on diethylenetriamine and heptafluorobutyric acidin a mass ratio of 1:2. The super-hydrophobic coating is prepared from the super-hydrophobic coating material. The super-hydrophobic coating material has the advantages of excellent super-hydrophobicperformance, strong weather resistance and the like, can be used for preparing the super-hydrophobic coating, and has relatively high use value and a relatively good application prospect. The preparation method of the super-hydrophobic coating has the advantages of being simple in process, convenient to operate and the like, can prepare the super-hydrophobic coating with excellent self-hydrophobicanti-icing performance on a large scale, and facilitates industrial application.

A pressure sensor includes: a casing; a sensor chip with a gauge resistor; a boss disposed on the gauge resistor; a metallic diaphragm capable of distorting in accordance with a pressure; and a load transmission member disposed between the metallic diaphragm and the boss. The casing accommodates the sensor chip, the boss and the load transmission member. The casing is covered with the metallic diaphragm. The pressure applied to the diaphragm is detected such that the load corresponding to the pressure is applied to the gauge resistor through the metallic diaphragm, the load transmission member and the boss so that the pressure is measured on the basis of a resistance change of the gauge resistor. The gauge resistor is larger than the boss.

A commutated electric drive has an electric motor having a sensor assembly which has a permanent magnet on a shaft of the electric motor and an analog Hall sensor situated stationary relative to the stator of the electric motor opposite to the permanent magnet. A controller for controlling the windings of the electric motor has a memory for storing a calibration Hall signal of the magnetic field of the permanent magnet, measured using the Hall sensor, over one revolution of the shaft. The controller has a device for comparing the calibration Hall signal with an instantaneous Hall signal of the instantaneous magnetic field of the permanent magnet, measured using the Hall sensor. Temperature effects and aging effects may be recognized and taken into account when determining the rotor position.

The invention relates to a regulating method for a turbocharger (1) with a turbine (4) which has a variable turbine geometry (VTG) provided with adjustable guide blades (5), having the following method steps: a) closing the guide blades (5) of the variable turbine geometry (VTG), as a function of the present operating point of the internal combustion engine which is turbocharged by means of the turbocharged (1), to the maximum possible closing position of the guide blades (5) for said operating point, and b) regulating the charge pressure (P2) by adjusting the position of the guide blades (5) in a closed regulating loop.

The invention discloses an FPGA-based highly-integrated high-precision control system for a micro flywheel, which mainly comprises a direct current power supply, a digital controller, an integrated three-phase bridge drive chip, a permanent magnet brushless direct current motor, a direct current detecting device and a position detecting device. The system takes an FPGA chip which has high reliability and is operated in parallel as a controller, and realizes sequential logic functions of a digital calculating unit, PID control, phase conversion logic, PWM, RS232 serial port communication, rotating speed measurement and A / D sampling trigger of a current and the like on an FPGA through a VHDL language. Compared with other special integrated digital processors, the system has the advantages of programming flexibility, high program reliability and good real-time. Hardware circuits of the invention are highly integrated, which integrates a three-phase full-bridge inverter and a drive circuit thereof in the integrated three-phase bridge drive chip so as to realize highly-integrated high-precision steady-speed control of a brushless direct current motor used for the micro flywheel.

The invention discloses a switch valve driven by a magnetostrictive actuator, which is characterized in that a giant magnetostrictive rod in the switch valve is placed in a coil framework; an enamel wire is wound on the coil framework, and an outer sleeve is sleeved outside the coil framework; a chassis is mounted at the lower end of the outer sleeve, and a spacing disc is mounted at the upper end of the outer sleeve; a knockout pin is placed in an I-shaped through hole of the spacing disc; a pre-pressurized dish spring is sleeved on an upper guide post of the knockout pin; a pressure plate is pressed into the upper end of the outer sleeve and screwed into an E-shaped threaded hole of the chassis by pre-tightening force of a bolt; a thread boss of the outer sleeve is mounted in the threadcavity of a valve base, and a stroke column of a stroke amplifier is placed in a J-shaped through hole of the pressure plate; a ball journal is placed in a countersunk round hole of the stroke magnifier, and the ball journal moves in a guide track groove of a valve core; the valve core is mounted in a central through hole of a valve casing; the stroke magnifier, the valve casing and the valve base are installed by means of bolts; and the valve body is welded on the valve casing.

The invention discloses a method for suppressing the commutation torque ripples of a brushless DC motor. The invention relates to the technical field of control technology of brushless DC motors. The method includes the following steps: after entering a break off, conducting upper bridge commutation based on the formula: (as shown in the description) to resolve cycle count of advanced commutation; conducting lower bridge commutation based on the formula (as shown in the description) to resolve cycles of advanced commutation; the PWM cycle count n1 during the ongoing period of the previous Hall signal; the PWM cycle count n2 during the ongoing period of the current Hall signal; when n1-n2 is greater than n upper or n lower, conducting no commutation, and when n1-n2 is not greater than n upper or n lower, conducting commutation: an upper bridge-non-commutation phase duty cycle staying at 1, changing an on-phase duty cycle from 0 to a duty cycle d of an off-phase duty cycle prior to the commutation, the off-phase duty cycle being changed to doff; a lower bridge-non-commutation phase duty cycle staying at d, changing the on-phase duty cycle from 0 to the duty cycle 1 of the off-phase prior to the commutation, the off-phase duty cycle being changed to doff. According to the invention, the method can be applied to a wide range of rotation speeds and load changes and has high electric output power.

An apparatus for holding a stable condition at two positions comprising a driving magnet 130 having driving magnetic poles and adapted to be movable in two directions; a driven magnet 140 having driven magnetic poles arranged to be always repulsed by the driving magnetic poles and adapted to be movable in two directions; a motion limiting means for limiting the movement of the driven magnet; and a driving means for driving the driving magnet in two directions. A direction of the repulsion force applied to the driven magnet by the driving magnet is changed, at a stage during which the driving magnet is moved to a first moving direction by the driving means, to a second acting direction of repulsion force opposite to a first acting direction of repulsion force which has been caused until said stage; and at a stage during which the driving magnet is moved to the second moving direction opposite to the first moving direction by the driving means, to the first acting direction of repulsion force opposite to the second acting direction of repulsion force which has been caused until said stage.

For forming an annular magnetostrictive coat on an outer peripheral surface of a rotational shaft associated with a magnetostrictive torque sensor, a magnetostrictive-coat forming method comprises a step of fitting a cylindrical masking jig over the outer peripheral surface of the rotational shaft and securing the masking jig to the outer peripheral surface, a step of placing the rotational shaft in a plating tank to thereby form the magnetostrictive coat by plating on the outer peripheral surface, and a step of detaching the masking jig from the rotational shaft.

The invention relates to a continuous remote transmission floater type level gauge, which comprises a floater and a magnetic connector, the continuous remote transmission floater type level gauge is characterized in that: the level gauge further comprises an electrically conductive or magnetically inductive and electrically conductive guide rail, and at least one guide rail is covered by an insulating layer and wound with resistance wires; the magnetic connector comprises an insulating case and a magnetic shaft or a metal shaft arranged horizontally; for the magnetic floater type level gauge, the magnetic connector further comprises a magnetic steel; the magnetic shaft or the metal shaft moves up and down along the guide rail with the up-and-down movement of the floater under the action of magnetic force; and a corresponding liquid level value is obtained by measuring a resistance value in a conducting loop consisting of the guide rail, the magnetic shaft or the metal shaft so as to realize continuous remote transmission of liquid level data. The continuous remote transmission floater type level gauge can further comprise a fixed slide pulley, a balance weight, a connecting rope or a balancing magnetic connector brought by connection. The continuous remote transmission floater type level gauge has remarkable characteristics of simple structure and continuous remotely transmitted signal.

An electromagnetic actuator has a movable core, a housing that holds the movable core so that the core may freely reciprocate, and an attractive part that applies a magnetic force to pull the movable core in one of the reciprocating directions. The electromagnetic actuator further has a stator that constitutes a magnetic circuit along with the movable core. At least one of the sliding faces of the housing and the movable core in contact with each other is subjected to gas soft nitriding, salt-bath soft nitriding, sulfo-nitriding, or nitriding treatment. The surface roughness of such a nitrided face is controlled to be within a prescribed range, so that the wear of the sliding faces of the movable core and the housing can be reduced.

The invention discloses a straw type agricultural waste crushing and composting integral control device which comprises a material composting chamber, a straw crushing device, a temperature oxygen control system, a humidity control system and a discharge system, wherein a feeding hole, a measuring hole and a standby hole are formed in the material composting chamber; a groove is formed in the bottom of the material compositing chamber; the upper part of the material compositing chamber is connected with the straw crushing device; the lower part of the material compositing chamber is connectedwith a micro-pore net, a porous plate and a cold-hot air mixing chamber; the straw crushing device comprises a feeding driving motor and double mixing blades; the temperature oxygen control system comprises a temperature measurer, an oxygen measurer, a temperature oxygen cascade control system, an air blower, a hot resistance wire, an air tube, a hot air chamber, a bypass cold air valve, a rotor flowmeter and a cold-hot air mixing chamber; an air tube hole is formed beside the cold-hot air mixing chamber; a percolate discharge hole is formed in the lower part of the cold-hot air mixing chamber; the humidity control system comprises a humidity measurer, a spraying device, a straight-in single-base valve and a humidity controller; the discharge system comprises a discharge groove, a discharge driving motor, rolling wheels, a discharge hole and a push-pull type baffle plate. The invention further discloses two straw type agricultural waste crushing and composting methods of fixed value continuous control and programmed control. By adopting the device, automatic material feeding and discharge, automatic crushing and composting fermentation can be implemented in the straw type agricultural waste treatment process, automatic control on humidity, temperatures and oxygen in the composting process can be achieved, the labor and materials can be saved, meanwhile, the compositing time ofagricultural wastes can be shortened, and composting conditions can be optimized.

A method for operating an internal combustion engine (110) is provided. The method includes ascertaining an actual value (T) of an operating temperature of the internal combustion engine (110). An electrically driven compressor (600) located in an intake pipe (205) of the internal combustion engine is activated if the actual value (T) of the operating temperature of the internal combustion engine is below a threshold value (T_th) thereof.

The invention provides a calibration loading device for an adjustable pretightened piezoelectric dynamometer through a hydraulic pressure. The calibration loading device belongs to the fields of a sensor and measurement control of the sensor. The calibration loading device is composed of a loading cylinder sleeve, a loading plunger, a pretightening spring, a pretightening adjusting sleeve, a loading rod and a dynamic sealing ring. The calibration loading device can perform calibrated loading on a condition that a loading force source is far from the piezoelectric dynamometer or the piezoelectric dynamometer is arranged in a sealed chamber. The pretightening adjusting sleeve can adjust a pretightening force of the loading plunger, thereby reducing retardation of the loading device in performing return stroke calibration on the piezoelectric dynamometer, furthermore ensuring a fact that the loading plunger can return to an original position after pressure discharging is finished, and improving testing precision to the piezoelectric dynamometer.

The invention discloses an alkoxy ethers temperature-sensitive polymer nanometer microsphere and a preparation method thereof. The method includes the steps of first catalyzing two monomers for copolymerization through rhodium metal to obtain a temperature-sensitive polymer; dissolving the polymer in an acidic aqueous solution, and adding a corresponding cross-linking agent to obtain the intelligent nanometer microsphere. The nanometer microsphere has good dispersibility in an aqueous solution and shows good temperature-sensitive behavior. The size of the nanometer microsphere can be reversibly regulated through external temperature stimuli. The alkoxy ethers temperature-sensitive polymer nanometer microsphere and the preparation method thereof provide a theoretical basis for the construction of the nanometer microsphere through a dynamic keys crosslinked temperature-sensitive polymer, have an important academic value in the preparation of novel intelligent nanometer materials and are instructive for the expansion of the application of the stimulus responsive temperature-sensitive polymer in the fields of materials science, drug sustained release and envelope.