69results about How to "Small time lag" patented technology

The present invention relates to a method of managing the consumption and distribution of electricity in a user facility, wherein the user facility is connected to an electricity supply grid and the user facility comprises a grid connected on site generator; the method comprising the steps of measuring waveform conditions on a portion of the electricity supply grid adjacent the user facility to obtain locally measured waveform conditions; measuring electrical power readings from the on site generator; communicating the locally measured waveform conditions and the electrical power readings to a controller in the user facility; determining, at least on the basis of the locally measured waveform conditions, whether the electricity supply grid is oversupplied or undersupplied with electricity; and, modifying the flow of the electricity within the user facility based on whether the electricity supply grid is oversupplied or undersupplied with electricity and / or the electrical power readings from the grid connected on site generator.

A camera includes an optical system, an image sensor, a white balance correction section, an original image processing section, a geometric setting section which sets a desired geometric transformation for the original picture signal, a geometry converter which generates a geometrically converted picture signal based on the geometric setting made by the geometric setting section, an edge component extractor, an edge signal generator, and an image synthesizer which synthesizes the geometrically converted picture signal and signal at the edges to generate a picture signal. The edge signal generator performs geometrical transformation of the edges of the image based on the geometric setting and is parameter-controlled based on a geometry parameter computed from a coefficient to emphasize edges for controlling the enhancement at the edges amount for the edges of the image and magnification to zoom an image calculated based on the geometric setting.

A digital camera having small time lag for recording the object after releasing a shutter by employing less movable parts, and by employing an image sensor for other purpose as well as actual forming picture image for recording the object is provided. According to one aspect of the present invention, a digital camera includes an image sensor having a plurality of two-dimensionally arranged pixels capable of selectively reading out signals from desired pixels and capable of adding signals of at least two pixels prior to getting the output from the image sensor, a first processor for processing outputs got from the individuals of the pixels of the image sensor to form a picture image of an object of the camera and a second processor for processing the added signal of the image sensor for light metering of the object. In the digital camera according to the present invention, by using an image sensor capable of selectively reading out signals from desired pixels and capable of adding signals prior to getting the output from the image sensor, signals from respective pixels are read out while processing picture image forming, and the output is got from the image sensor after signals from respective pixels within light-metering area are added while processing light metering. Accordingly, calculation for light metering can be processed quickly and a circuit for processing signals output from the image sensor can be simple. As a result, power savings as well as cost savings can be realized.

The invention discloses a boiler fly ash ignition carbon measuring device, which comprises a sample feeding component, an ignition component, a transmission component, a sample weighing component, a sample discharge component and a crucible supporting plate. Crucible holes are arranged on the crucible supporting plate; the center of the crucible supporting plate is fixed to the top end of a pull rod passing through a station platform; a synchronizing wheel is arranged on the pull rod disposed between the crucible supporting plate and the station platform; a transposition motor fixed under the station platform is connected with the synchronizing wheel via a synchronizing belt; a sample feeding station, an ignition station, a sample weighing station and a sample discharge station are sequentially arranged on the station platform; the sample feeding component, the ignition component and the sample discharge component are respectively positioned above the sample feeding station, the ignition station and the sample discharge station; and the sample weighing component is positioned below the sample weighing station. By installing an electric scale below the station platform, the carbon measuring device enables the length of a weighing rod to be shortened heavily, enables the anti-vibration capability of the weighing rod to be strengthened greatly, and then improves measurement accuracy. Additionally, the crucible supporting plate is a strip-shaped plate with two through holes capable of holding a crucible, has simple structure, small rotation inertia, and is favorable for controlling accuracy of rotation.

The invention provides an error data identification method applicable to secondary equipment of a power supply system. The method comprises the following steps: if difference between two adjacent sampling values of the secondary equipment is greater than a preset threshold, then the current data are the error data, and the error data are discarded. The theory is as follows: firstly, as primary equipment of the power supply system has large inductance and capacitance, in the case of serious fault of the power supply system, the current value or voltage value of the power supply system does not suddenly changes but changes according to an exponential function curve; secondly, a mutual inductor of the primary system and an internal mutual inductor of the secondary equipment which are used for signal transformation have a maximum range limit, so the sampling value of the second equipment has a maximum value; and thirdly, if the sampled signal has frequency, the sampled signal has the frequency characteristics. The threshold of the permissible maximum sampling value difference can be set by integrating the three steps with the specific characteristics of the secondary equipment, such as amplitude corresponding to sampling point number and sampling conversion of each cycle.

The invention discloses a traction motor on-line monitoring-based electric locomotive idling slippage identification method which comprises the steps of: taking electric parameters such as three-phase voltage of a traction motor, three-phase current of the traction motor and traction torque command as on-line monitoring parameters; then, acquiring the identification parameter related to an idling / slippage characteristic space by a multi-sampling rate expansion kalman filter method; meanwhile, using a data drive-based idling / slippage decision algorithm to obtain the judgment of idling / slippage trend by on-line data; and finally, based on the information, realizing the idling / slippage identification of a locomotive. The method has the beneficial effects that the electrical time constant of the traction motor transition process is far shorter than the mechanical time constant of the traction motor transition process, so that the time lag is greatly reduced, and the method can rapidly realize the locomotive idling / slippage identification so as to open up a space for optimizing an adhesion coefficient; and according to the method, d a speed sensor is not needed, thus saving the cost and improving the system reliability.

A transdermally absorbable preparation that even when a drug with poor solubility in a base is added in high concentration, is stable over time and can suppress crystallization of the drug, excelling in transdermal absorbability. There is provided a transdermally absorbable preparation, comprising a base and, added thereto, at least composite particles which are composed of a silicate compound and an organic acid and a drug.

An active anti-resonance vibration insulating device based on a digital controller is characterized in that the configuration is that one set of piezoelectricity acceleration sensor is provided on a vibration insulating platform. An actuator is provided between the vibration insulation platform and a base. The output end of the piezoelectricity acceleration sensor is connected with the digital controller. The output end of the digital controller is connected with the input end of the actuator which actuates under the controlling of the digital controller to apply force to the vibration insulating platform for generating a vibration insulating movement. The frequency of the movement is same with the frequency of the vibration from the base to the vibration insulating platform. The amplitude of the movement is same with the amplitude of the vibration from the base to the vibration insulating platform. The direction of the movement is opposite with that of the vibration from the base to the vibration insulating platform. The invention can simultaneously realize the anti-resonance vibration insulations of a plurality of frequencies.

{Problem}The exact method with small time-lag of detecting injection pressure for controlling pressure in an electric-motor driven injection molding machine without using a pressure detector has been asked for because the pressure detector is very expensive, necessitates troublesome works for mounting, an electric protection against noise and the works for zero-point and span adjustings and causes a complicate mechanical structure.{Solution}The present invention uses a high-gain observer which contains the discrete-time arithmetic expressions derived from a mathematical model of an injection and pressure application mechanism in an electric-motor driven injection molding machine consisting of a state equation and an output equation and outputs an estimate of injection pressure, which is one of the state variables of the above state equation, by using an injection velocity signal and a servomotor current demand signal or actual motor current signal as inputs. The high-gain observer obtains the exact injection pressure estimate with very small time-lag without using a pressure detector. Thus the estimate of injection pressure fed by the high-gain observer can be adopted as a feedback signal of actual injection pressure for controlling injection pressure.

The invention discloses a vibration elimination method for an arm frame of a concrete spreading device. The method comprises the steps: detecting a vibration direction signal and a vibration intensity signal of the tail end of the arm frame; and when the vibration intensity signal exceeds a vibration intensity threshold value, selectively controlling a hydraulic pump to communicate with a rod-end cavity or a cap-end cavity of an arm frame hydro-cylinder, adjusting a pump output pressure P1 according to the vibration direction signal, and maintaining the vibration signals within the range of a set threshold value by adjusting the pressure of the rod-end cavity or the cap-end cavity of the arm frame hydro-cylinder, and when the vibration intensity signal does not exceed the vibration intensity threshold value, control the hydraulic pump output to zero. By means of the technical scheme, the output pressure of the arm frame hydro-cylinder can be controlled according to the vibration of the arm frame. The vibration elimination method for the arm frame of the concrete spreading device takes corresponding control by detecting the vibrations of the arm frame, so that the detection is simple and convenient, the adjustment can be processed in real time, the control is direct and has low time delay, the control precision is high and the energy-saving effect is obvious.

A driving tool of the invention includes a motor, a flywheel that is rotationally driven by the motor, an operating member that drives a material to be driven, an operating member actuation mechanism that selectively transmits a rotating force of the flywheel to the operating member and drives the operating member. The flywheel includes a driving-side member that is rotationally driven by the motor, a driven-side member that transmits a rotating force to the operating member, and a clutch member that connects the driving-side member and the driven-side member when the rotation speed of the motor is a predetermined speed or higher, while releasing the connection between the driving-side member and the driven-side member when the rotation speed of the motor is lower than the predetermined speed.

Disclosed are: a nutriculture system which enables the circulation of a nutrient solution while preventing the proliferation of pathogenic bacteria, and which can promote the growth of a plant effectively and steadily while preventing the change in components of the nutrient solution; and a water treatment apparatus for sterilization and purification purposes, which is compact in size. Specifically disclosed is a nutriculture system which can circulate a culture solution, which is a liquid fertilizer, between a nutrient solution tank and a cultivation bed. The nutriculture system is characterized in that a water treatment apparatus for sterilizing and purifying only the culture solution that flows through the cultivation bed is provided between the nutrient solution tank and the cultivation bed, wherein the water treatment apparatus comprises a unit having an ozone supply function for supplying ozone to the culture solution, an ultraviolet ray irradiation function for irradiating the culture solution with ultraviolet ray, and a photocatalyst-acting function for allowing a photocatalyst to act.

A power management system includes a plurality of power storages and a server. The server includes a selector that selects at least one of the plurality of power storages, a scheduler that makes a schedule for the selected power storage, and a request processor that requests a user of the selected power storage to control at least one of external charging and external power feed in accordance with the made schedule. The server obtains desire information that indicates a desire level (priority on battery life / priority on an incentive) and carries out at least one of selection of the power storage and making of the schedule based on the obtained desire information.

The invention discloses a method, a device and a medium for ensuring final data consistency of distributed transactions, the method comprises the following steps: acquiring a business request, acquiring a service set formed by each service associated with the business request, wherein the server set at least comprises two services; obtaining a parameter of each service related to the business request to obtain a parameter subset corresponding to the service, and obtaining a parameter set corresponding to the service set based on the parameter subset corresponding to each service in the serviceset; generating an idempotent task according to the parameter set, wherein the idempotent task is used for performing idempotent operation on each parameter in the parameter set; and executing the idempotent task, and returning an execution result of the idempotent task. According to the method, the time required for achieving the final data consistency state is remarkably shortened, and the timedelay is reduced while it is ensured that the distributed transaction is executed at a high success rate.

The invention discloses a method for defining wrong data of an intelligent device in a power supply system. The current sampling point is defined as a kth point, a point next to the current sampling point is defined as a (k+1)th point, a point previous to the current sampling point is defined as a (k-1)th point, and a point two position previous to the current sampling point is defined as a (k-2)th point; the sampling values of the points are y(k), y(k+1), y(k-1) and y(k-2) respectively; a maximum threshold value of the difference of the sampling values which is allowable by the device is setaccording to the sampling value in a steady state when the device has the most serious failure; and the threshold value is taken as a precondition for defining whether the sampling value is the wrongdata or not. By the method, the wrong data possibly occurs in the sampling of the device caused by noise or interference in the system, or hardware failures such as sampling abnormality or software failures such as program running out and the like in the device can be filtered, and time lag caused by the conventional software and hardware filtering method can be obviously reduced.

The invention relates to a discrete sliding mode control method of a piezoelectric drive deformation wing. The discrete sliding mode control method comprises the following steps: (a) establishing a coupling kinetic model of piezoelectric suppression wing flutter according to a Lagrange equation; and (b) according to discrete control, sliding mode control and the coupling dynamic model, obtaining adiscrete sliding mode control law of the piezoelectric drive deformation wing, and if the input voltage is carried out according to the control law, converting the wing into a stable state from a flutter state within limited time. Numerical simulation is carried out on discrete sliding mode control. The method has the most important characteristics that a novel piezoelectric actuator is adopted,the driving strain is better, and meanwhile, the wing surface of the wing can be actively controlled, so that the weight of the wing is reduced, and the reliability of the wing is improved. In addition, a discrete sliding mode controller is designed by adopting a discrete sliding mode control method, and wing bending-torsion coupling flutter is effectively inhibited.

The invention provides a real-time positioning method and device fusing laser radar and IMU sensor information, and the method comprises the steps: taking unscented Kalman filtering as a frame, carrying out the motion prediction of an unmanned platform through the data of a high-frequency inertial measurement unit, and caching the data; after the point cloud matching module receives the laser radar data with the timestamp, using the predicted pose as prior information, performing matching based on normal distribution transformation and a known point cloud map, and obtaining global positioning information with delay; using the positioning information for updating unscented Kalman filtering at the moment of the laser radar timestamp, calibrating the prediction error of the inertial measurement unit, and using the cached high-frequency inertial measurement unit data for performing re-prediction based on the positioning information, so that the low-delay and high-frequency positioning effect is realized. According to the method, high-frequency and low-delay real-time positioning can be realized, and a better control effect is brought.

The invention provides an air volume control system. The system comprises an activated sludge oxygen consumption respiration rate meter, an industrial computer, an electric gas flow regulating valve,an air flow meter and a blower; the activated sludge oxygen consumption respiration rate meter is arranged at the tail end of an anoxic tank, and detects an OUR value of the sewage entering an aeration tank in real time; the industrial computer converts the OUR value into a required gas volume, then a required gas volume signal is transmitted to a blower control cabinet to adjust the blower and output the required gas volume; a control system adjusts the air volume of each aeration branch pipe by adjusting the opening degree of the valve and makes the sum of the air volumes of the branch pipesequal to the total gas volume value. The control system can effectively shorten the time lag of a sewage biochemical treatment system, reduce the repeated periodic oscillation of the system, and prolong the service life of the system; the influence of external interference factors is effectively reduced, and stable running of the system is ensured.

The invention discloses a multi-objective robust control method for a high-speed railway pantograph type current collector based on state estimation. The multi-objective robust control method comprises the steps of: firstly, constructing a nonlinear pantograph type current collector-catenary model, and then constructing a control-oriented pantograph-catenary system model according to the nonlinearpantograph type current collector-catenary model to obtain a state-space equation under the pantograph-catenary system; secondly, determining a pantoraph active control target, and performing equation treatment on the control target; adding process noise and measured noise into the state-space equation according to the state-space equation under the pantograph-catenary system, so as to obtain anestimation-oriented discrete state equation; and finally, utilizing a space equation of the control target to design a multi-objective controller, and combining with an estimation result to obtain theoptimal active control force. The multi-objective robust control method studies the effectiveness and robustness of the control strategy in detail by means of the nonlinear pantograph-catenary model,and the control strategy still has good control performance under different operating conditions.

A pressure guiding tube blockage diagnosing device includes a receiving portion that receives pressure data from a pressure detecting portion, a feature quantity calculating portion that partitions a time series of pressure data, received by the receiving portion, into a plurality of intervals, and calculates, for each interval, a feature quantity indicating the state of fluctuation of a pressure, a change rate calculating portion that performs, for each interval, a smoothing process on the feature quantities over a specific time interval up to that interval, and calculates, from the feature quantities that have been subjected to the smoothing process, a change rate, for each interval, indicating the change of state of blockage of a pressure guiding tube therein, and an evaluating portion that evaluates the state of blockage of the pressure guiding tube based on the change rate calculated by the change rate calculating portion.

The invention discloses a self-powered rotary shaft vibration active control system and an active control method. In the self-powered rotary shaft vibration active control system, an inner housing isfixedly connected with a rotary shaft; a first end cover can be rotatably connected to the inner housing; a second end cover can be rotatably connected to the inner housing; the outer housing is fixedly connected to the first end cover and the second end cover; a permanent magnet is fixedly connected with the outer housing; a coil rack is fixedly mounted on the inner housing; a magnet exciting coil is wound on the coil rack, and generates relative motion with a permanent magnet to generate electric energy; an accelerated speed sensor is fixedly connected to the rotary shaft to measure a vibration signal of the rotary shaft in real time; an elastic element is fixedly connected to the rotary shaft; an actuator is fixedly connected to the elastic element, so that applied acting force acts onthe rotary shaft through the elastic element; the controller is electrically connected to the magnet exciting coil and the accelerated speed sensor; by responding to the vibration signal, the controller analyzes and processes the vibration signal to form a control signal; and by responding to the control signal, the actuator applies acting force on the rotary shaft through the elastic element to actively control radial vibration of the rotary shaft.

The invention relates to a lawn mower adopting an exhaust gas turbocharging auxiliary device. The device includes a gas outlet pipe sealed and communicated with a rear intake pipe and a gas introduction pipe sealed and communicated with an exhaust pipe. There is a flow control device sealingly connected between the adjacent ends of the tubes. The flow control device is controlled by the accelerator pedal on one side. When the accelerator pedal is released, the flow control device is suitable for introducing an appropriate amount of gas from the gas outlet pipe to the gas inlet pipe; loosen the accelerator pedal When pedaling, the compressed gas in the rear intake pipe is directly introduced into the exhaust pipe through the pipeline and the flow control device, and the flow control device adjusts the amount of gas introduced according to the speed of the accelerator pedal; The speed sends a proper amount of outside air into the front intake pipe; the power of the engine is immediately weakened with the relaxation of the accelerator pedal, reducing the time lag of the turbo.

The invention relates to a gear-driven device which is a resultant-force device taking a plurality of small motors as power sources. The gear-driven device comprises a motor, driving gears and a driven gear; the motor and the driving gears are matched closely and provide power for the gear-driven device; two or more driving gears are arranged at the periphery of the driven gear and meshed with the driven gear respectively; the driving gears rotate synchronously and concertedly, so that the driven gear rotates, and the driving gears act on the driven gear jointly so as to drive the driven gear; and the driven gear is used to transfer force to the outside of the gear-driven device. The gear-driven device is a good power-driven device and can be used for the equipment needing to be provided with power.