16 results about "Critical range" patented technology

The invention relates to the technical field of roller coating hyperbolic aluminum plate machining control, in particular to an edge auxiliary traction system and method for longitudinal large-curvature forming of a roller coating hyperbolic aluminum plate. The edge auxiliary traction system comprises a clamping pre-deformation unit, when a main stretcher is started, a traction clamping jaw pulls down at a basic speed, and a dynamic proportional relation between the edge stretching speed and the central stretching speed is established; during stretching, when the displacement increment reaches a threshold value, the traction force is proportionally distributed according to the distance from the center line, the pull-down force is updated in real time, when the strain deviation exceeds the limit, a deviation area is positioned through a multi-modal array, the traction speed and the pull-down force of the area are increased, and the local curvature radius reaches a critical range, a reinforced traction mode is started; speed and plastic flow phase locking and grain orientation regulation and control are achieved, traction force is maintained till stress is released in the pressure maintaining stage, the longitudinal large-curvature forming precision of the roller-coated hyperbolic aluminum plate is improved, wrinkles and cracks are reduced, and the method is suitable for machining of the high-precision hyperbolic aluminum plate.

The invention relates to the technical field of power equipment connection, and discloses a cable connector for an internal gateway of a power cabinet, which comprises an active protection mechanism, and is characterized in that the real-time temperature of the joint of the cable connector and a cable is monitored through a temperature sensing assembly arranged in the active protection mechanism; when the temperature of the joint of the cable connector and the cable exceeds a critical temperature range, the overheating protection mechanism and the active protection mechanism drive the cable to fall off from the signal connection end of the cable connector, thereby preventing internal components of the cable connector and the active protection mechanism from being damaged due to overheating. When the temperature of the joint of the cable and the cable connector is between the optimum working range and the critical range, a temperature sensing assembly in the overheat protection mechanism monitors the phenomenon, a control system arranged in the power cabinet drives a cooling device to input stable working current, local heat dissipation is carried out on the joint of the cable connector and the cable, and the cable connector is prevented from being damaged. And the overall service life of the cable connector and the cable is further prolonged.

The invention discloses a thermal deformation control method for hot gas bulging forming of ultrahigh-strength steel. According to the method, the temperatures of a fillet area and a central area of a mold are controlled to be lower than the temperature of a non-deformation supporting area in the axial material supplementing and radial forming stage; bulging is conducted through a dynamic air pressure curve, the strain rate is inversely calculated in real time based on the wall thickness measured through laser, and the strain rate is stabilized within the critical range through closed-loop feedback; meanwhile, the temperature of the pipe blank is monitored in real time through a thermal infrared imager and compared with a target value, and the deviation is controlled within + / -5 DEG C by adjusting a mold temperature control unit; according to the method, the dynamic air pressure curve is introduced and is cooperatively controlled with the strain rate in real time, so that the deformation rate of the material in the whole bulging process is always stabilized in the optimal critical plasticity interval, the deformation capacity of the ultrahigh-strength steel at the high temperature can be fully exerted, the uniformity of wall thickness distribution of a component can be greatly improved, and the deformation rate of the ultrahigh-strength steel at the high temperature can be improved. And local excessive thinning or fracture caused by out-of-control strain rate is avoided.

The invention discloses an unmanned vehicle navigation positioning method and system based on particle swarm optimization, and relates to the technical field of intelligent traffic, and the method comprises the following steps: S001, building an inertia weight regulation table, and recording and recognizing the critical range of inertia weight change through the historical moving trajectory of an unmanned vehicle and environment change to form a basic parameter set; and S002, constructing a speed change buffer chain under the guidance of the inertia weight regulation and control table, performing hierarchical and segmented processing on the particle swarm real-time speed adjustment amount, and constraining the speed change amplitude and rhythm to obtain a limited speed adjustment sequence for suppressing group synchronous oscillation. According to the invention, by introducing an inertia weight regulation table, a speed change buffer chain, a time sequence regulation cable and a position balance belt, dynamic balance regulation and closed-loop control of particle swarm navigation positioning are realized. According to the method, speed synchronous oscillation is effectively inhibited, the pose output is smoothed, and continuous connection of steering and power control is kept, so that the navigation and positioning stability and control precision of the unmanned vehicle are improved.

This invention relates to the field of power electronic converter control technology and discloses a method and apparatus for judging the transient stability of a hybrid system with a grid-connected converter. The method includes constructing an equivalent model of the hybrid system comprising a grid-connected converter and a network-connected converter, wherein a virtual impedance is connected in series in the branch of the network-connected converter; constructing a Lyapunov energy function based on the equivalent model, wherein the independent variables include the power angle and phase-locked loop frequency of the grid-connected converter, and the power angle, frequency, and voltage amplitude of the network-connected converter; determining the stability domain boundary of the hybrid system using the Lassel invariant set principle when the derivative of the energy function with respect to time is less than or equal to 0; calculating the critical range of the virtual impedance based on the changing trend of the stability domain boundary, and determining the target value of the virtual impedance to maintain the transient stability of the hybrid system. The above method achieves quantitative judgment and parameter tuning of the transient stability of the hybrid system.

The application provides a method for coping with non-cooperative targets by a UAV formation based on a reachable set, comprising: obtaining flight state information and control information of target UAVs and non-cooperative target UAVs, and detecting whether potential conflicts exist between the target UAVs and the non-cooperative target UAVs; when potential conflicts exist, determining a dangerous set according to the flight state information of the target UAVs and the non-cooperative target UAVs, and constructing a system dynamic data group; constructing a Hamilton-Jacobi partial differential equation with the system dynamic data group and a pre-defined cost value function; taking an implicit surface function corresponding to the dangerous set as a termination condition, solving the Hamilton-Jacobi partial differential equation, and obtaining an optimal control strategy; determining a boundary reachable set according to the optimal control strategy; and when the target UAVs reach a critical range of the boundary reachable set, waking up a safety controller to adjust the control strategy of the target UAVs. By implementing the method, the calculation is reduced, potential collisions are avoided, and flight safety is ensured.

1. The name of the design product: range hood control graphical user interface for electronic device. 2. The use of the design product: an electronic device. 3. The design points of the design product: the graphical user interface content displayed on the screen. 4. The picture or photo that best indicates the design points: design 1 front view. 5. Design 1 is designated as the basic design. 6. The use of the graphical user interface: to reflect the ambient air quality, and the user can realize the function of range hood air purification by clicking, touching icons (keys), etc. 7. The change state of the graphical user interface: design 1 front view is the main interface; click weak gear to enter design 1 interface change state diagram weak gear working interface; design 2 front view is the main interface; click the explosive stir-fry gear icon to enter design 2 interface change state diagram explosive stir-fry gear working interface; design 3 front view is the main interface; click the power icon to enter design 3 interface change state diagram 1 strong gear working interface; the interface displays the environmental PM2.5 content, and after a preset time, enter design 3 interface change state diagram 2 detection result (qualified range) display interface; design 4 front view is the main interface; click the power icon to enter design 4 interface change state diagram 1 strong gear working interface; the interface displays the environmental PM2.5 content, and after a preset time, enter design 4 interface change state diagram 2 detection result (exceeding the standard) display interface; design 5 front view is the main interface; click the power icon to enter design 5 interface change state diagram 1 strong gear working interface; the interface displays the environmental PM2.5 content, and after a preset time, enter design 5 interface change state diagram 2 detection result (critical range) display interface; design 6 front view is the main interface; if the shutdown time exceeds the preset time, click the power icon to enter design 6 interface change state diagram intelligent ventilation working interface.

Systems and methods are provided for identification and discrimination of subpopulations within a mixture of particles. The systems and methods implement continuous calibration of the classification of particles within the mixture to provide consistency in operation and to reduce inter- and intra-batch processing variation. The systems and methods produce advantageously sorted particle products.

The invention relates to the technical field of water electrolysis hydrogen production, in particular to water electrolysis hydrogen production equipment and method using ultrapure water. The equipment is provided with a detection element for collecting cathode pressure, anode pressure and gas production parameters; the configuration controller controls output of the direct-current power supply and action of the release valve according to acquired data; the controller judges the hydrogen and oxygen interchanneling risk based on the collected data, and determines that the hydrogen and oxygen interchanneling risk possibly exists when the cathode and anode pressure difference is within a preset critical range; and executing an opening pulse action under the condition, acquiring and contrasting transient responses of the cathode pressure and the anode pressure in the opening pulse action process so as to obtain a detection result about whether hydrogen and oxygen interplay occurs or not, and updating a judgment result about the hydrogen and oxygen interplay risk. The stability of the quality of produced gas can be kept in the electrolysis process, and the safety of hydrogen and oxygen separation is ensured.

The present application discloses an image processing method and system based on artificial intelligence, which relates to the field of artificial intelligence technology. The image processing method based on artificial intelligence includes the following steps: S1: acquiring data to be processed according to an initial acquisition frequency; S2: preprocessing the data to be processed to obtain preprocessed data; S3: acquiring a target mining data set according to an acquisition code, analyzing the preprocessed data through the target mining data set to obtain a current difference value, and analyzing the current difference value. If the current difference value falls within a normal range, S1 is executed; if the current difference value falls within a critical range, the initial acquisition frequency is adjusted to obtain a new acquisition frequency, data to be processed is acquired according to the new acquisition frequency, and S2 is executed; if the current difference value falls within an abnormal range, an alarm message is sent. The present application can correct the data to be processed, thereby improving data quality, and can provide timely warnings of disaster hazards.

Systems and methods are provided for identification and discrimination of subpopulations within a mixture of particles. The systems and methods implement continuous calibration of the classification of particles within the mixture to provide consistency in operation and to reduce inter- and intra-batch processing variation. The systems and methods produce advantageously sorted particle products.

The present application provides an elevator state detection method, apparatus, device, and storage medium. The method includes: performing a frequency domain transformation on a recently acquired acceleration sequence to obtain a target spectrum, and converting the target spectrum into a power spectrum; then, when the power value corresponding to the power spectrum jumps from a first power zone to a second power zone, starting to record real-time acceleration values, and stopping recording until the real-time acceleration values ​​fall within a preset critical range, thereby obtaining a target acceleration sequence; comparing the target acceleration sequence with a set state template sequence to determine the vertical motion state of the elevator; finally, performing a difference calculation on the elements in the recently acquired air pressure sequence and a reference air pressure value to obtain an air pressure difference sequence; inputting the air pressure difference sequence into a trained neural network model to obtain a prediction result; and determining the elevator floor position based on the prediction result. This solution effectively improves the accuracy of elevator state detection and provides a reliable state data reference.

The application relates to the technical field of power equipment connection, and discloses a cable connector for an internal gateway of a power cabinet, which comprises a positive protection mechanism; the temperature component arranged in the positive protection mechanism is used for monitoring the real-time temperature at the cable connector and cable connection position; when the temperature at the cable connector and cable connection position exceeds the critical temperature range, the overheating protection mechanism and the positive protection mechanism drive the cable to fall off from the signal connection end of the cable connector, so that overheating damage of the internal components of the cable connector and the cable is avoided; when the temperature at the cable connector and cable connection position is between the optimal working range and the critical range, the temperature component in the overheating protection mechanism monitors the phenomenon, and drives the cooling device to input stable working current through the control system arranged in the power cabinet, so that the cable connector and cable connection position is locally cooled, and the overall service life of the cable connector and the cable is further improved.

The invention discloses a method for evaluating ecological environment evolution situation and value along an extra-high voltage line, and the method comprises the steps: collecting calibration parameters related to vegetation coverage, soil physicochemical, hydrological dynamic, geologic structure and biological diversity through an extra-high voltage ecological evolution monitoring and analysis platform; a disturbance critical interval of each parameter is determined through an extra-high voltage ecological disturbance threshold model, a coupling response relationship between geology and other ecological parameters is analyzed through a geologic ecological response model along a line, and evolution trends under different time dimensions are quantified by using an ecological evolution trend weighted analysis algorithm. The method solves the problems that an existing method is single in evaluation dimension and insufficient in systematicness, and the method has the advantages that the evaluation index system including spatial differentiation and time evolution characteristics is constructed, and finally, multi-model output results are integrated, so that the comprehensive evaluation of the ecological, economic and social values of the ecological environment along the extra-high voltage line is realized. And the comprehensiveness and the accuracy of the evaluation result are improved.

The invention relates to the technical field of optical lens design, and discloses a Fermat spiral golden angle offset lens arrangement method and system.The method comprises the steps that lens parameters are obtained, a curved surface polar coordinate system is established, a Fermat spiral model is adopted to generate an initial dot matrix, uniformity is evaluated through Voronoi space subdivision, and a final lens array is obtained. Self-adaptive offset optimization is carried out in a golden angle critical range, a central vision protection area is applied to constrain and restore the uniformity of an inner ring, a pre-distortion compensation mechanism is adopted when curved surface projection mapping is executed, optical parameters of the microstructure are configured according to the radial position, and finally a digital processing file is generated. According to the invention, high-uniformity isotropic arrangement of the microstructures can be realized on the curved surface of the lens, and the technical problems that the existing periodic arrangement generates structured artifacts and the existing non-periodic arrangement lacks adaptive optimization capability are solved.

The invention relates to the technical field of geomagnetic detection, in particular to a magnetic field detection device used in a polar region environment, which comprises a first probe, a second probe and a data processing circuit board, a plurality of first magnetic field sensors which are orthogonally arranged are arranged in the first probe; a plurality of orthogonally arranged second magnetic field sensors are arranged in the second probe; according to the device, probe measurement values and environment temperature are monitored in real time through the data processing circuit board, when the first probe measurement value is in a measuring range critical interval and temperature change indicates that a temperature drift error exceeds a limit, second probe data are preferentially adopted for output and calibration, and a setting / resetting circuit is dynamically triggered to eliminate sensor magnetic history; measurement temperature excursion in a polar region ultra-low temperature environment is effectively inhibited, full-scale high-precision magnetic field detection is also realized, and the reliable requirement of unattended long-term stable monitoring in a polar region severe environment is met.