22results about How to "Guaranteed output stability" patented technology

The invention, which relates to the technical field of social emotion analysis, discloses a university social negative emotion characterization analysis system comprising a data acquisition and preprocessing module, a feature extraction and anomaly detection module, an intelligent perception and negative emotion characterization module, and an anomaly risk assessment and response module. Emotional feature information is acquired in real time based on a multi-dimensional data source, and the acquired emotional feature information is cleaned and preprocessed. According to the method, by calculating the data consistency offset coefficient and the strong correlation coefficient, the multi-collinearity problem among multi-dimensional data features is solved, and instability of the model regression coefficient is avoided. And the system identifies abnormal correlation in real time and combines risk threshold classification processing to ensure robust model output. An analysis set is established by continuously collecting data, long-term emotion trend analysis is supported, personalized responses such as reminding, intervention or emergency measures are provided according to risk levels, and accurate management and timely adjustment of student emotional states are achieved.

The invention relates to a control method and device of a load simulation device for a cabinet soft start test, and relates to the field of soft start tests.The control method comprises the steps that gear selection is conducted on the load simulation device according to a gear simulation scheme, and the current selected load power is recorded; temperature values of components in the load simulation device are collected in real time; calculating temperature drift information according to the component temperature value and the reference operation temperature range; load deviation information is matched according to the temperature drift information, the current selected load power is corrected to obtain operation load power, and the operation load power is output to a control panel; a temperature control adjustment scheme is matched according to the positive and negative relation of the temperature drift information, and the temperature value of the component is adjusted according to the temperature control adjustment scheme; and when the operation load power displayed by the control panel is consistent with the current selected load power, the temperature control regulation of the load simulation device is stopped, and a test waiting state is entered. The load simulation device has the effect of eliminating temperature influence to guarantee the output stability of the load simulation device.

This invention provides an assisted assessment method for scoliosis based on uncertainty gating and graph reasoning. Standing back RGB images are acquired via a mobile terminal in an uncontrolled environment. High-resolution feature maps are extracted, and multiple key points on the body surface are detected. Simultaneously, a heatmap, peak confidence score, and distribution variance based on the second-order central moment in pixel space are output, explicitly measuring localization uncertainty. An adaptive gating value is generated based on the joint measurement of peak confidence score and distribution variance. Local features of each key point are dynamically weighted and fused with global reference features element-wise: when the localization reliability is below a learnable threshold, the gating value approaches zero, and the weight of the global reference features is automatically increased to achieve noise isolation. Then, graph neural network message passing is executed according to a predefined anatomical adjacency matrix to structurally correct isolated abnormal nodes. Finally, the corrected features are aggregated, and scoliosis screening information is output. This invention overcomes the problem of poor robustness caused by occlusion and illumination disturbances in uncontrolled environments, achieving highly reliable non-invasive self-examination on a mobile device.

The invention belongs to the technical field of power supply control, and particularly relates to a power control device and method for aircraft ground power supply equipment. The equipment comprises a direct-current power supply subsystem, an alternating-current power supply subsystem, a power control system and at least one liquid crystal screen operation unit, the direct current power supply subsystem comprises a first working power supply, a direct current side power unit and two paths of direct current output plugs which are electrically connected in sequence; the alternating current power supply subsystem comprises a second working power supply, an alternating current side power unit and two paths of alternating current output plugs which are electrically connected in sequence; the power control system is in communication connection with the direct-current power supply subsystem and the alternating-current power supply subsystem, and the liquid crystal screen operation unit is electrically connected with the power control system. According to the technical scheme, the problem of airplane power supply failure caused by low network casting rate, single power supply system type and large instantaneous current disturbance of a conventional ground power supply is solved, and the method is more environment-friendly.

The present invention relates to the field of vehicle control technology, and discloses an intelligent automobile cold start control method, comprising the following steps: step S101, when the temperature of a fuel cell stack is less than a first temperature threshold, entering step S102; step S102, generating a characteristic matrix; step S103, inputting the characteristic matrix into a first control model, and outputting an opening adjustment value of an electromagnetic hydrogen exhaust valve and a speed adjustment value of an air compressor; step S104, when the output voltage of the fuel cell stack is greater than or equal to a voltage threshold, entering step S105; step S105, generating a characteristic sequence; step S106, inputting the characteristic sequence into a second control model, and outputting an output power adjustment value of a power battery; step S107, when the temperature of the fuel cell stack is greater than or equal to a second temperature threshold, the vehicle cold start ends; the present invention can dynamically adjust the vehicle through the first control model and the second control model, thereby ensuring the output stability and efficiency of the entire fuel stack and improving the vehicle cold start speed.

The unmanned aerial vehicle optimal path adaptive planning method based on particle swarm optimization relates to the field of unmanned aerial vehicle path planning, and comprises the following steps: constructing a spatial constraint model of an unmanned aerial vehicle flight task; initializing a particle swarm based on the spatial constraint model; combining path smoothness, path threat probability and voyage efficiency to establish a multi-objective fitness function, and calculating the fitness value of each particle based on the particle swarm; performing hierarchical particle swarm optimization iteration, in each iteration, adaptively adjusting the control parameters based on the current particle swarm distribution characteristics, and updating the path node position of the particles; when the convergence condition is met, outputting the global optimal path as the final flight trajectory of the unmanned aerial vehicle, and controlling the unmanned aerial vehicle to execute. The unmanned aerial vehicle optimal path adaptive planning method based on particle swarm optimization solves the problems that the unmanned aerial vehicle route path optimization target is single and difficult to coordinate, and the route planning path effect is poor.

The invention discloses a unipolar and bipolar pulse generating device for electric field ablation and a control method, and relates to the technical field of electric field ablation. The unipolar and bipolar pulse generating device comprises a high-voltage charging module, a half-bridge series pulse generating module and a driving control module; the high-voltage charging module provides high-voltage electric energy for the half-bridge series pulse generation module; the driving control module is connected with the half-bridge series pulse generation module and is used for controlling the on-off of a switch of the half-bridge series pulse generation module; one end of the load matching and protection module is connected with the half-bridge series pulse generation module, and the other end is connected with a load to realize pulse matching transmission and safety protection. The technical scheme that unipolar and bipolar can be freely switched is adopted, dual optimization of the ablation effect and operation safety is achieved, ablation pretreatment is conducted in a bipolar mode, and an ablation blind area caused by the single unipolar electric field direction is eliminated through alternate positive and negative pulses.

This invention discloses a GM pulse tube refrigerator and a flow-splitting method for the pulse tube refrigerator, comprising a helium compressor, a primary accumulator, a secondary accumulator, a secondary pulse tube, and a primary pulse tube. The helium compressor is connected to the primary accumulator. The key feature is that a flow-splitting structure is provided at the connection end between the primary and secondary accumulators, with a primary gas channel and a secondary gas channel on the flow-splitting structure. The primary accumulator is connected to the primary pulse tube through the primary gas channel. In this invention, by setting a gas flow-splitting structure in the cold end of the GM pulse tube refrigerator, and by setting primary and secondary gas channels, and by changing the effective area ratio of the primary and secondary gas channels, the amount of helium entering the primary and secondary pulse tubes is configured, ensuring sufficient primary cooling and secondary pre-cooling. This rationally distributes the gas volume to achieve the expected primary and secondary cooling performance, ensuring ideal flow rates at deep cryogenic temperatures and guaranteeing stable cooling output.

The application discloses a kind of double-stator permanent magnet motor multi-objective optimization design method and motor considering multiple working conditions performance, according to multiple operating modes of double-stator permanent magnet motor and corresponding torque, efficiency demand, determine the design parameters of inner and outer stator and rotor and multi-working condition optimization target;Establish initialization finite element simulation model, collect data by uniform sampling to design parameters and optimization target, carry out correlation analysis and according to the result, eliminate the parameters with low correlation;The conflict relationship between optimization targets is analyzed using the aggregation tree algorithm, representative targets are extracted, and the target dimension reduction is completed;The reduced data is used to train a proxy model, and the proxy model is applied to a multi-objective optimization algorithm to optimize the motor performance.Finally, the motor design scheme is simulated and evaluated.The application solves the problem of excessive design parameters and optimization targets caused by multiple working conditions and complex motor structure of double-stator permanent magnet motor, and improves the optimization efficiency while improving the comprehensive performance.

A stator core, a birotor motor and a clothes dryer, the stator core comprises a plurality of outer stator wire slots and a plurality of inner stator wire slots, the outer stator wire slots and the inner stator wire slots are formed by separating a plurality of tooth parts uniformly distributed on yoke parts, and the extension directions of the tooth parts on the two yoke parts are opposite. The plurality of inner stator wire slots are used for accommodating stator windings to form an inner magnetic field, the plurality of outer stator wire slots are used for accommodating stator windings to form an outer magnetic field, and at least one yoke part is provided with a magnetic resistance structure used for inhibiting mutual interference between the inner magnetic field and the outer magnetic field. According to the utility model, on the premise of ensuring the output stability and efficiency of the double-rotor motor, the distance between the outer stator wire duct and the inner stator wire duct can be reduced, so that the outer diameter of the stator core is reduced, the size of the stator is reduced, and the size of the double-rotor motor is smaller; therefore, the double-rotor motor is suitable for a clothes dryer and other scenes with high volume requirements, and the equipment compactness is improved.

The invention provides a pre-charging sample hold circuit and a control method thereof, the pre-charging sample hold circuit comprises a sampling module, and the sampling module comprises a sampling capacitor, an input end, an output end, a sampling unit and a holding unit. One end of the sampling unit is connected with the input end, the other end is connected with the sampling capacitor, and the sampling unit is used for transmitting input signals to the sampling capacitor; one end of the holding unit is connected with the sampling capacitor, and the other end is connected with the output end, and is used for outputting sampling signals of the sampling capacitor through the output end. In the sampling mode, the sampling unit is conducted to enable the input end to be electrically connected with the sampling capacitor, and the maintaining unit disconnects the output end from being electrically connected with the sampling capacitor. In the correction mode, the sampling unit and the holding unit are conducted.

The application discloses a super capacitor energy storage power energy optimization system based on a Boost converter, relates to the technical field of power supply or power distribution circuit devices and electric energy storage systems, and comprises a pre-charging circuit, a super capacitor energy storage device, a Boost circuit, an LLC full-bridge inverter circuit, a rectification filtering and buffering circuit, a detection unit and a controller. The Boost circuit is connected between the super capacitor energy storage device and the LLC full-bridge inverter circuit and is used for boosting voltage when the output voltage of the super capacitor energy storage device is lower than a preset threshold value. The data acquisition unit acquires data to regulate and control the boosting work of the Boost circuit and the driving logic of the LLC full-bridge inverter circuit. The application adds the Boost circuit between the super capacitor energy storage device and the full-bridge inverter circuit, and solves the problems of low energy utilization rate and unstable output of the existing super capacitor energy storage high-voltage power supply.

The invention discloses a vehicle-mounted special-shaped structure self-adaptive loudspeaker system, which relates to the technical field of electroacoustic transducers and vehicle-mounted audio systems and comprises a special-shaped vibrating diaphragm module, a magnetic circuit driving module and a boundary coupling module. The special-shaped vibrating diaphragm module is in a non-axisymmetric shape, and a non-uniform stiffness gradient is constructed through local physical thickening or carbon fiber reinforcement, so that the stiffness of the vertex is greater than that of the center to suppress segmentation vibration; the magnetic circuit driving module utilizes asymmetric magnetic gaps with gradually-changed widths to be matched with variable-density coils to balance stress distribution of long and short shafts so as to correct driving distortion; the boundary coupling module integrates a shape memory alloy framework and a flexible sealing body, and self-adaptive radial expansion locking of a mounting interface is achieved. Through the design, the problems of vibration mode disorder and complex space sealing adaptation of the special-shaped loudspeaker are solved, sound short circuit is effectively eradicated, resonance is isolated, and the tone quality reduction degree and transient response performance of a non-standard installation position in a cabin are improved.

The invention discloses a power taking device for improving the online rate of a power distribution automation terminal and a using method, the power taking device comprises two half box bodies which can be opened and closed, the middle positions of the sides, close to each other, of the half box bodies are each provided with a half wire groove, and when the half box bodies are closed to form a complete box body, the half wire grooves form a complete wire groove; a lead is concentrically and coaxially embedded in the lead groove; a CT power taking module, a solar power generation module, a control module and a battery module are arranged in the complete box body, the CT power taking module and the solar power generation module are connected in parallel, the control module is electrically connected with the battery module, and the battery module comprises a main battery and a standby battery which are connected with the control module in parallel. And meanwhile, the output power is ensured through the standby batteries connected in parallel, and insufficient output power caused by damage of the batteries of the power distribution automation terminal is avoided.

The invention relates to a moisture-friction dual-mode power generation device and application thereof.The power generation material of the moisture-friction dual-mode power generation device has the special design of a layered structure and layered pores, the controllability of components and structural performance of the power generation material is high, the universality is high, the large-scale production potential is large, and the excellent electrical performance and application potential of a dual-mode power generation system are effectively guaranteed. According to the dual-mode power generation system provided by the invention, complementary power collection of moisture and triboelectricity is realized, and research and development of green and sustainable power supplies are promoted.

This application relates to the field of smart meter technology, specifically to a smart meter designed to address the technical problem of reducing power consumption in smart meters, thereby ensuring product compliance and improving the product's green energy efficiency. To this end, the smart meter of this application includes a rectifier module, a DC power supply module, and a communication module. The rectifier module provides a first DC voltage to the DC power supply module. The DC power supply module includes a DC-DC converter; the fifth terminal of the DC-DC converter is connected to the first DC voltage, and the sixth terminal of the DC-DC converter is connected to the communication module, used to convert the first DC voltage into a third DC voltage to power the communication module. Through this configuration, the smart meter of this application has lower heat loss and higher conversion efficiency, thereby effectively reducing the power consumption of the smart meter.

The application discloses a kind of main control board for picosecond laser treatment system, including STM32 single-chip microcomputer and RS232 serial communication touch screen control circuit module, RS232 serial communication laser output control and state monitoring circuit module, opto-coupler isolated IO input circuit module, opto-coupler isolated IO output circuit module, analog voltage input circuit module, TFT card and USB data storage module, DAC circuit module, galvanometer control circuit module and network communication circuit module, the STM32 mainboard is driven by above-mentioned each functional circuit module to the peripheral equipment of corresponding electric control system.The application also discloses 755nm picosecond laser treatment electric control system.The application has big data function and network communication function, has AI auxiliary operation, internet of things system, teaching video function.Greatly improve the treatment effect, safety, reliability, effectiveness of product, reduce product cost, use difficulty, failure rate, maintenance rate and maintenance cost.

This invention provides a laser printing device that ensures the output stability of a UV laser and includes: an excitation light generating unit; a laser generating unit for generating UV laser; a laser scanning unit for two-dimensional scanning of the UV laser; a distance measuring light emitting unit for emitting distance measuring light; a merging mechanism for merging the distance measuring light with the UV laser in a laser optical path; a distance measuring light receiving unit for receiving the distance measuring light separated from the laser optical path by the merging mechanism; a distance measuring unit for measuring the distance to the surface of a workpiece based on the light receiving position of the distance measuring light; a sealing part that hermetically seals the merging mechanism and is provided with a first transmission window and a second transmission window; the distance measuring light merged into the laser optical path by the merging mechanism; the distance measuring light separated from the laser optical path by the merging mechanism is transmitted through the first transmission window; and the UV laser and the distance measuring light merged by the merging mechanism are transmitted through the second transmission window before irradiating the printing object.

The utility model provides a novel efficient vacuum pump unit which comprises a solvent removal kettle, a condenser, a pressure container, a controller, a first vacuum pump, a second vacuum pump and water circulation vacuum pumps, the controller drives a plurality of water circulation vacuum pumps to start and operate at the same time, and controls the first vacuum pump and the second vacuum pump to stop operating. Driving a plurality of water circulation vacuum pumps to stop running in sequence within a preset starting time period, driving a first vacuum pump to run after all the water circulation vacuum pumps stop running, and driving a second vacuum pump to run after the first vacuum pump runs for a first time period, therefore, in the initial stage of organic solvent removal, the multiple water circulation vacuum pumps operate at the same time to ensure high-flow quick discharge, the multiple water circulation vacuum pumps are stopped in sequence within the preset starting time period to cooperate with reduction of output flow in the process of organic solvent gradual removal, then the flow is reduced after the organic solvent is reduced, and the removal efficiency of the organic solvent is improved. The first vacuum pump and the second vacuum pump are controlled to operate after the first time period so as to drive the first vacuum pump and the second vacuum pump to start and operate, so that the high negative pressure performance of the vacuum pump unit is ensured, an organic solvent is completely removed, and the purposes of high efficiency and energy conservation are achieved; sequential output at the front end and the rear end of the pressure container is achieved, and the working stability of a unit is guaranteed.

The utility model relates to the field of multilayer flow guide structure for air cooling laser device, concretely relates to a multilayer flow guide structure for air cooling laser device, including the shell body, the inner wall fixedly connected with mounting bracket of shell body, the upper surface of mounting bracket is installed with circuit board, the inner wall fixedly connected with laser generator of mounting bracket, the inner wall of shell body is provided with closed blowing assembly, multilayer flow guide assembly, multilayer flow guide assembly is used for connecting to place mounting bracket, multilayer flow guide assembly includes base. Through the forward and reverse operation of fan in closed blowing assembly, the airflow path switching of working state and standby state is realized, the stable closed air duct that forms the arc surface of the adhesion base is formed when working, guarantees the efficient heat dissipation of high power operation, the reverse airflow can satisfy the low power consumption heat dissipation demand to avoid heat accumulation when standby, can also remove internal dust, solved the problem that the existing direct current type flow guide structure cannot adapt to different heat dissipation demand.

The utility model relates to a novel multi-pipeline damping duckbilled silica gel valve and a discharging assembly. The technical problem that an existing silica gel valve can generate drip leakage is solved. Comprising a valve body, the valve body is provided with a disc-shaped valve body disc, a plurality of through holes are distributed in the valve body disc, a plurality of duckbilled valve bodies in one-to-one correspondence with the through holes are arranged on one side of the valve body disc, and the valve body disc and the duckbilled valve bodies are connected into an integrated structure and are made of silica gel materials; a valve body inlet communicated with the through hole is formed in the upper end of the valve cylinder part, and a flat duckbilled part with a valve body outlet is arranged at the end, away from the through hole, of the valve cylinder part. The valve has the advantages that the duckbilled valve body can be conveniently communicated with the discharging connector through the valve barrel part and the through hole, the mounting efficiency is improved, and the liquid output efficiency can be improved. And the damping valve clack can play a role in buffering impact on liquid in the duckbilled valve body, the service life is prolonged, the drip-proof effect can be achieved, and the use experience of a user is improved.

The invention discloses a power failure rapid protection method for a single-phase PWM rectifier. The single-phase PWM rectifier comprises a full-bridge circuit formed by connecting four switching tubes. In the positive half cycle of the alternating current signal, the S2 tube is the main control tube of the bridgeless PFC circuit, and in the negative half cycle of the alternating current signal, the S4 tube is the main control tube of the bridgeless PFC circuit; and in five power frequency periods after power failure, the switch tube is controlled to discharge the inductance current at the alternating current side. When the power supply is just turned off, the current at the inductor is not zero, in order not to cause oscillation, the inductor current continues to flow along the original direction, sudden change of the current direction is avoided until the consumption is zero, and overlarge oscillation caused by backflow is avoided. Oscillation of the alternating current side after power failure can be effectively suppressed, stability of output voltage of the direct current side can be achieved, and output stability of the rectifier is guaranteed.