27results about How to "Improve output accuracy" patented technology

The invention discloses a broadband spectrum compression detection method based on digital twinning and signal noise, and relates to the technical field of mobile communication, and the method comprises the following steps: S1, inputting historical spectrum data, geographic position information and electromagnetic environment parameters into a digital twinning model based on an improved FEDform model, and obtaining a digital twinning model; outputting predicted power spectral density and signal support set probability distribution; s2, generating an optimized observation matrix and a digital compression measurement vector; s3, outputting a whitening measurement value; s4, innovative components are extracted; s5, outputting reconstructed broadband spectrum data; s6, outputting a binary support set matrix containing frequency point occupancy state information; and S7, outputting the updated digital twin model. According to the invention, the limitations of dependence on high-speed sampling hardware, poor anti-noise capability and early warning delay in a traditional broadband spectrum detection method are overcome, and an efficient and accurate solution is provided.

The utility model provides a modified star-shaped cinder valve. The modified star-shaped cinder valve comprises a shell, an impeller, a driving motor, a baffle assembly and a plugging assembly. The impeller is arranged in an inner cavity of the shell and comprises a rotating shaft and a plurality of blades, the driving motor is in transmission connection with the impeller, the baffle assembly comprises two baffles fixedly connected in a feeding port of the shell, an inlet is formed between the two baffles, and the plugging assembly comprises a sealing plate connected between the outer ends of every two adjacent blades. The two partition plates are connected to the outer side of each sealing plate, a material receiving groove is formed between the two partition plates, and the material receiving grooves sequentially pass through the position below the inlet along with rotation of the impeller; the baffle assembly can reduce entering of materials, the blocking assembly can reduce the conveying amount of the materials, and therefore the requirement for the small conveying amount of the materials is met, and the motor frequency does not need to be reduced.

The invention provides a three-redundancy LVDT (Linear Variable Differential Transformer) consistency adjusting device, and belongs to the technical field of airborne servo sensors. The connecting plate is used for fixing the LVDT rotor; the three springs are respectively arranged on the three LVDT rotors in a sleeving manner; a housing; a pressing plate; the three adjusting ejector rods are used for adjusting the positions of the three LVDT stators; and the three scribing turntables are fixed to the three adjusting ejector rods respectively and used for determining the adjusting distances of the three adjusting ejector rods, angle scales are engraved on the outer sides of the side plates, indicating lines are arranged on the scribing turntables, and the indicating lines are matched with the angle scales to read the rotating angles of the adjusting ejector rods. According to the adjusting device, linear displacement is converted into angular displacement, angle scribed lines and screw pitch conversion, accurate quantitative adjustment of the consistency of the three-redundancy LVDT is achieved, and the output precision of the three-redundancy LVDT is improved.

The invention belongs to the technical field of avionics testing and signal simulation, and discloses an LVDT analog simulation circuit and a signal simulation method thereof, and the LVDT analog simulation circuit comprises a main control module, a communication interface module, an excitation signal processing module and a sensor signal simulation output module. The main control module receives an external displacement setting instruction through the communication interface; the excitation signal processing module comprises a DAC unit and an excitation conditioning unit and is used for generating amplitude control voltage and conditioning an external LVDT excitation signal; the sensor signal simulation output module serves as a core and comprises a difference value control unit, a sum value control unit, a summation unit and a differencing unit, a conditioned excitation signal and amplitude control voltage are synthesized through an analog multiplier and an operational amplifier circuit, and finally three-phase differential signals (a high end, a low end and a center tap) simulating a real LVDT sensor are output. A mechanical LVDT is replaced by a full-electronic mode, high-precision, programmable and flexible simulation of displacement signals is achieved, the device is particularly suitable for occasions needing high-reliability LVDT interface testing and verification such as an aviation flight control system, and the device has the advantages of being low in cost, high in flexibility and easy to integrate automatic testing.

This invention discloses a power system planning method, apparatus, terminal equipment, and storage medium that considers the wake effect of wind turbines. Belonging to the field of power systems, the method includes: predicting forecast meteorological data and forecast load data for the target planning period based on historical meteorological data, historical load data, and preset maximum and minimum temperature thresholds; determining the wake influence area of ​​the wind turbines and the predicted wind speed at each wind turbine based on wind turbine coordinates, forecast meteorological data, and wind turbine parameters; correcting the predicted wind speed at each wind turbine based on a wind turbine wake obstruction logic matrix constructed from the wake influence area and wind turbine parameters, wind turbine parameters, and ground roughness; and planning the power system to be planned based on the wind farm output and forecast load data for the target planning period calculated using the corrected wind speed, forecast meteorological data, and wind turbine parameters. By implementing this invention, the problem of deviations in power system planning due to wind turbine wake effects is solved.

The high-precision reversing valve comprises a valve body assembly and a valve element assembly, the valve body assembly comprises a valve element pipeline part, a feeding pipeline part, a first pressure pump pipeline part and a second pressure pump pipeline part, and a large-flow channel, a small-flow channel and a feeding channel are formed in the valve element assembly; and in the small discharging state, the small flow channel is communicated with the second pressure pump pipeline piece and the discharging port, and the feeding channel is communicated with the first pressure pump pipeline piece and the feeding pipeline piece. When small-flow discharging is carried out, the actual discharging amount completely comes from paint in the second pressure pump pipeline piece, accurate control over the discharging amount is facilitated, meanwhile, no matter large-flow discharging or small-flow discharging is carried out, paint in the other pressure pump pipeline piece and the valve element pipeline piece can flow back into the feeding pipeline piece synchronously, and therefore the working efficiency is improved. And the coating fully flows, so that the coating is prevented from being solidified, and the discharging precision is improved.

The utility model discloses a pouring ladle mobile platform for furnace dumping, relates to brown corundum production field, and solves the problem of the existing technology that the pull rope is easy to break due to long -term use in high temperature environment, causes raw materials to scatter when the furnace body dumps and has the hidden danger of safety. The rear end of both sides of the upper end of mobile platform is fixedly connected with the support column, the upper end of two support columns is rotatably connected with L type rotary arm, the hydraulic rod is arranged between two first rotary joints and two second rotary joints respectively, the rear end common fixed connection of two L type rotary arms has the tow plate, the furnace body is provided at the front end of tow plate, and the tow plate is fixedly connected with the dumping lifting plate on both sides of the furnace body. The hydraulic rod and L type rotary arm structure of rigid connection replace the traditional steel wire rope traction mode, and effectively solve the hidden danger of safety that the steel wire rope is easy to break in high temperature environment.

The invention discloses a high dropout linear regulator. According to the high-voltage-difference linear voltage regulator, the second end of a power tube is connected with the first end of a zero point compensation module, and a zero point generated by the zero point compensation module compensates a pole of the output end of the high-voltage-difference linear voltage regulator. The offset voltage calibration module samples the current of the power tube and generates a calibration current according to the sampled current so as to calibrate the feedback voltage. The output voltage feedback module generates feedback voltage according to the output voltage of the power tube to the inverted input end of the error amplification module, reference voltage is connected to the in-phase input end of the error amplification module, and the error amplification module adjusts the control end voltage of the power tube according to the reference voltage and the feedback voltage so as to adjust the output voltage of the power tube. According to the technical scheme, the application range of the load capacitor is widened, the application flexibility of the high-voltage-difference linear voltage regulator is improved, and the precision of the output voltage of the high-voltage-difference linear voltage regulator is improved.

The invention discloses a doubly-fed flywheel energy storage-based network following-construction fusion control method, which comprises the following steps of: 1, acquiring electrical parameters of a stator and a rotor of a doubly-fed fan, performing coordinate transformation to obtain dq-axis components, and calculating real-time output power of the stator; 2, a virtual internal potential phase is generated through virtual synchronous control, a phase-locked loop obtains a power grid phase, modulation voltage reference values are output respectively, and a final modulation voltage reference value is obtained through weighted sum so as to realize dynamic fusion control of network following and network construction characteristics, and in the network following control, a modulation voltage is obtained through a rotating speed-active and reactive outer loop and a current inner loop, and the current inner loop is added to the rotating speed-active and reactive outer loop; in the network construction control, instantaneous power is calculated through electrical parameters, a reference phase and voltage are obtained through virtual synchronous control, and modulation voltage is output through a single voltage loop. According to the method, the characteristics of the network following current source and the network construction voltage source are fused, advantage complementation is achieved, the method has fast power adjustment and power grid supporting performance, the method is adaptive to a wide-short-circuit-ratio power grid scene, and therefore the weak power grid stability and the new energy consumption capacity can be effectively improved.

This invention proposes a hardware implementation method, apparatus, electronic device, and computer-readable storage medium for the Sigmoid function, relating to the field of data processing technology. The method constructs a function mapping table for the Sigmoid function, containing discrete non-negative floating-point values ​​within the unsaturated interval, based on the symmetry and saturation of the Sigmoid function, thereby substantially reducing the scope of the lookup table. On this basis, the absolute value of the floating-point values ​​belonging to the unsaturated interval is taken to obtain the value to be processed. This value is then converted to the target fixed-point format, and integer operations are used for table lookup, interpolation, and symmetry restoration to obtain the output value of the Sigmoid function based on the target floating-point value, improving computational efficiency. While ensuring the function output capability across the entire range, the size and storage overhead of the function mapping table are effectively reduced, while linear interpolation under the fixed-point format improves output accuracy.

The application relates to the technical field of reluctance rotary transformers, in particular to a reluctance rotary transformer and a rotor profile design method thereof, which comprises a stator and a rotor, eight stator teeth with the same parameters are arranged on the inner wall of the stator; a stator tooth winding is further arranged on the stator, the profile vector radius of the rotor is r(ptheta), r(ptheta)=r1+lambda-l(ptheta), wherein r1 is the base circle radius of the salient pole rotor, lambda is the distance from the inner surface of the stator tooth pole shoe to the base circle of the rotor, l(ptheta) is the air gap length between the inner surface of the stator tooth pole shoe and the rotor; wherein p is the pole pair number of the rotor, theta is the mechanical rotation angle of the rotor, A is the inner surface area of the stator tooth pole shoe, mu0 is the air permeability, I m is the coil excitation current, N is the excitation winding number, phi m is the average magnetic flux, and delta is the amplitude modulation coefficient. In the case that the shape of the stator is determined, the rotor profile is designed through air gap change, so that the harmonic content of the output signal of the reluctance rotary transformer can be well reduced.

A variable-period time-division demodulation and control method for hemispherical resonant gyroscopes belongs to the field of inertial technology. This invention solves the problem of long filtering transients in traditional time-division schemes. The invention divides the time based on the complete resonant period of the gyroscope's vibration signal, keeping the time-division period the same as the gyroscope's resonant period. The zero-crossing position of the gyroscope's vibration signal is determined by a control chip, serving as the start and end point of a complete resonant period. After each complete resonant period, the multiplexer switches to the driving mode, applying a driving force to the gyroscope, and then switches back to the detection mode. There is a brief idle time between modes, and this cycle repeats. The detected signals within each detection period, after splicing, are closer to a continuous signal, making the demodulation filtering process more like a continuous filtering process, significantly shortening the filtering transient time in the demodulation process. This method can be applied to the field of inertial technology.

This invention discloses a low-dropout regulator and its tuning method, electronic device, and readable storage medium. The method includes: testing the low-dropout regulator and obtaining a first bandgap reference voltage and a first LDO output voltage; obtaining a tuning value and a reference tuning code based on the first bandgap reference voltage and a target bandgap reference voltage; obtaining an offset voltage and obtaining a second LDO output voltage based on the offset voltage, the first bandgap reference voltage, and the tuning value; obtaining a voltage divider tuning code based on the offset voltage, the target LDO output voltage, and the second LDO output voltage; and tuning the low-dropout regulator based on the reference tuning code and the voltage divider tuning code. This invention can obtain all tuning codes in one wafer test, and the second wafer test can be used for wafer screening, saving chip development time. The tuning method proposed in this invention considers the offset voltage of the chip in actual manufacturing and the influence of the bandgap reference circuit after tuning, improving the accuracy of the tuning algorithm and thus improving the output accuracy.

This invention relates to the field of integrated circuits, specifically to a time residual processing circuit, a correlation multiple sampling method, an SS-ADC circuit, and a chip. The time residual processing circuit extracts the residual signal from the quantization result based on the output of the comparator in the SS-ADC and completes the quantization of the time residual. The time residual processing circuit consists of a D flip-flop, an NOR gate, two resistors of the same value, four NMOS transistors, two capacitors of different values, and a comparator. A charging and discharging channel formed by the two capacitors is used to perform a rate-multiplication of the pulse width of the residual signal. The proposed correlation multiple sampling method and its circuit adjust the ramp signal type and the number of repeated samplings based on the light intensity of the input signal during the pixel signal quantization stage, and quantize the time residual of the process to correct the comparator output. This invention solves the problems of insufficient accuracy and high power consumption of the SS-ADC used in existing CIS circuits.

The application relates to a power system carbon index joint evaluation method and device based on an edge perception graph neural network, and belongs to the field of power systems, aiming to solve the problems of low evaluation efficiency, weak coordination between node and line carbon indexes, low integrated output degree and poor consistency of multi-index parallel output of existing carbon index evaluation. A running condition sample set is constructed, five types of carbon index labels are generated through power flow calculation and carbon emission flow analysis; the power system is abstracted into a graph structure, node and edge features are extracted to construct a training data set; an edge perception graph neural network is constructed to fuse the node and edge features; carbon indexes are output through double-channel decoding; the model is trained using a joint loss function to realize rapid carbon index evaluation. The application realizes integrated joint evaluation of node and line carbon indexes, improves evaluation efficiency and output consistency, solves the problems of poor adaptability and slow response of traditional evaluation, and can support high-frequency near-real-time calls.

This invention discloses a point cloud data correction method and related lidar, apparatus, program, and equipment. The method includes: determining the corrected field-of-view position information based on a pre-constructed temperature-distortion model, temperature data from the lidar receiving lens, and the field-of-view position information corresponding to the original measured point cloud data; and reconstructing three-dimensional point cloud data based on the corrected field-of-view position information and the point cloud data. This method enables real-time dynamic correction of the angle value of each laser ranging point during the online operation of the lidar. It eliminates nonlinear angle measurement errors introduced by temperature changes, especially the amplification of light rays at the edge of the field of view due to thermal expansion and contraction at large field-of-view angles, from the data source. It effectively suppresses the bending, twisting, or drifting of straight objects in the point cloud image at the edge of the field of view, thereby improving the point cloud output accuracy and coordinate reliability of the wide-angle blind-spot lidar under all temperature conditions.

The application provides an integrated quantum bit output link and relates to the technical field of input / output device links. The application aims to solve the problem that the space is limited during quantum bit transmission, and efficient heat treatment is difficult to achieve. The integrated quantum bit output link comprises three circulators, a load, a Josephson parametric amplifier and a connector. The load is arranged on the three circulators and is used for absorbing reverse transmission signals. The Josephson parametric amplifier is internally provided with the connector, and the Josephson parametric amplifier is connected with the three circulators through the connector. The integrated quantum bit output link can maintain good performance in a super low temperature environment, achieves the effects of high integration, high heat conduction and magnetic shielding, is easy to assemble and mass-produced, and effectively reduces the volume of the integrated quantum bit output link.

The application relates to the field of intelligent decision-making, and discloses a face living body detection method, device and equipment in a motion state scene and a medium. The method comprises the following steps: collecting a face image in a motion state scene, performing face detection on the face image to obtain a detected face, performing format standardization on the detected face to obtain a standardized face; performing texture coding on the standardized face to obtain coded texture of the standardized face, extracting texture information, calculating pixel change information, and constructing three-dimensional structure information of the standardized face; respectively performing feature extraction on the texture information, the pixel change information and the three-dimensional structure information to obtain texture features, pixel change features and three-dimensional structure features; performing feature fusion on the texture features, the pixel change features and the three-dimensional structure features to obtain fused features; and calculating a living body detection score of the standardized face to determine a face living body detection result of the face image. The application can improve the comprehensiveness of face living body detection in a motion state scene.

The utility model belongs to the technical field of motors, and particularly relates to an end cover of a synchronous motor and the synchronous motor, the synchronous motor comprises a casing, a coil assembly and a transmission assembly arranged in the casing, the transmission assembly is provided with a rotatable output shaft, the end cover is provided with a bearing hole, a bearing is arranged in the bearing hole, and the coil assembly is arranged in the casing. Compared with the prior art, the end cover and the synchronous motor provided by the utility model have the advantages that the ball bearing is arranged in the bearing hole of the end cover, the ball bearing can replace the original sliding friction between the output shaft and the shaft hole, the abrasion of the output shaft can be prevented through the bearing, the service life of the output shaft is prolonged, and the service life of the synchronous motor is prolonged. And the output shaft can rotate more smoothly, so that the output precision of the output shaft is improved and the service life of the output shaft is prolonged.

The application relates to a multi-modal information processing method and device, computer equipment, a readable storage medium and a program product, and relates to the technical field of artificial intelligence. The method comprises the following steps: acquiring multi-modal information and prompt information; the multi-modal information comprises text content and visual content, and the total context length of the multi-modal information exceeds a preset context length threshold; a multi-modal information processing model is called; the multi-modal information processing model is obtained by pre-training based on the strategy of preferentially retaining text content samples contained in multi-modal training samples, and then optimizing the sampling quantity of time sequence data in visual content samples contained in the multi-modal training samples, and then optimizing the block quantity of image data in the visual content samples; the multi-modal information and the prompt information are input into the multi-modal information processing model, so that the multi-modal information processing model performs context analysis on the multi-modal information based on the prompt information. The method can improve the accuracy of the multi-modal information processing result.

The application provides a high-voltage power supply module and a control method thereof, relates to the technical field of high-voltage power supplies, and the front-stage coarse adjustment unit converts the input DC voltage into an adjustable intermediate DC voltage; the rear-stage fine adjustment unit inversely converts the intermediate DC voltage into a high-frequency AC signal; the high-voltage generation unit boosts and rectifies the high-frequency AC signal into a high-voltage DC output; the feedback sampling unit collects the voltage and / or current signals of the high-voltage DC output in real time to generate a feedback signal; the central processing unit receives a target output setting value and the feedback signal; calculates the real-time deviation of the target output setting value and the feedback signal; according to the comparison result of the real-time deviation and a preset deviation threshold value, the front-stage coarse adjustment unit or the rear-stage fine adjustment unit is selectively adjusted to realize closed-loop stable control of the high-voltage DC output. The application can realize wide-range and high-stability high-voltage output, has fast protection capability and good adaptability, and is especially suitable for high-end detection fields such as nuclear physics experiments.

The utility model discloses a kind of negative voltage regulation control systems, comprising: negative power supply circuit is used to generate negative voltage;Negative voltage regulation circuit is connected with negative power supply circuit, for the negative voltage generated by negative power supply circuit is adjusted;The input end of negative voltage detection circuit is connected with the negative voltage output end of negative power supply circuit, the output end of negative voltage detection circuit is connected with system control module, and negative voltage detection circuit is used to detect the negative voltage output by negative power supply circuit;Auxiliary regulation circuit is connected with negative power supply circuit, for assisting negative voltage regulation circuit to adjust the negative voltage generated by negative power supply circuit;System control module is connected in negative voltage regulation circuit and auxiliary regulation circuit, and receives the negative voltage output by negative power supply circuit detected by negative voltage detection circuit, for comparing the negative voltage output by negative power supply circuit with demand negative voltage.The utility model can realize the dynamic regulation of negative voltage, improve the output accuracy of negative voltage, reduce the output deviation of negative voltage.

The application discloses a kind of self-adapting weighted redundancy sensor signal voting methods, including initial signal acquisition and static reference weight distribution, according to trend deviation, each channel consistency monitoring and hard fault isolation, soft fault evaluation and dynamic penalty factor generation are carried out, then determine the final dynamic weight coefficient of each channel in current period, finally, according to final dynamic weight coefficient, effective channel measurement value is adaptively weighted and summed, after limiting amplitude smoothing link processing, the multi-sensor voting output result of current time is generated.The scheme can solve the high-reliability data fusion and smoothing fault-tolerant control problem of mixed configuration of different measurement accuracy, dynamic characteristics and safety level of redundancy sensor under complex working condition, realize the high-precision fusion of mixed architecture sensor, enhance the fault-tolerant capability to sensor soft fault, and ensure the smoothness of fault switching and the strong generalization ability of system architecture.

The utility model relates to the technical field of cam indexers, in particular to a globoidal cam indexer, which is characterized in that a first indexing rod is meshed with a globoidal guide groove of a first globoidal cam in a gapless manner through a first needle bearing, a first arc-shaped track, a second arc-shaped track and a second needle bearing which are respectively meshed in a rolling manner, so that the output precision is improved; comprising a case I, an input shaft and a globoidal cam I, the device further comprises first arc-shaped rails, second arc-shaped rails, a plurality of first indexing rods, a plurality of first needle bearings and a plurality of second needle bearings, the first arc-shaped rails and the second arc-shaped rails are arranged on the two sides of the multiple arc-surface guide grooves and arranged in a staggered mode, and the first indexing rods are circumferentially and evenly installed on the outer wall of the first output shaft. The outer ends of the first indexing rods concentrically rotate the first needle bearing and the second needle bearing in the axial direction, and when the outer ends of the first indexing rods are located in the cambered surface guide groove of the first cambered surface cam, the first needle bearing is engaged with the first arc-shaped rail in a rolling mode, and the second needle bearing is engaged with the second arc-shaped rail in a rolling mode.

The application provides a power supply control system and method, and a power supply, and relates to the technical field of power electronics. The system comprises: a sampling feedback module for obtaining an operating parameter feedback signal of a main circuit of the power supply; a digital control module for generating an analog reference signal according to a target output parameter and the output parameter feedback signal; an analog control module comprising an output parameter outer loop, an inductance current middle loop and a peak current inner loop, for generating a wave generation control signal according to the analog reference signal and the operating parameter feedback signal; and a drive signal generation module for generating a drive signal for controlling a power switch tube in the main circuit of the power supply according to the wave generation control signal. The application can take into account the control flexibility, output precision, low output ripple, dynamic response performance and current limiting protection reliability of the power supply.

This utility model discloses a drive mechanism reducer, including a reduction gearbox, a DC brushless motor, a harmonic reducer, a gear transmission assembly, a lead screw and nut pair, and a control and detection system. High-precision transmission is achieved through multi-stage reduction via the harmonic reducer and gear pair, and the rotational-linear motion conversion of the lead screw and nut pair. A spring buffer mechanism between the push rod and the load eliminates gaps, ensuring smooth movement. Built-in distance switches, limit switches, and a customized circuit board enable position detection, alarm, and automatic start / stop functions. This reducer features high precision, accurate control, and stable structure, making it suitable for automated production lines, precision testing, and other equipment requiring precise control.