94results about How to "Improve output accuracy" patented technology

The invention discloses a control method and system for improving output precision of a switching power supply, and relates to the technical field of data processing. The method comprises the following steps: acquiring output voltage sampling values and output current sampling values of the switching power supply at a plurality of sampling time points; determining the current ripple amplitude of the switching power supply based on each output voltage sampling value and each output current sampling value; when the ripple amplitude exceeds an amplitude threshold, switching a control mode of the switching power supply to a preset adjustment mode, and determining a first adjustment step length according to the ripple amplitude; receiving a load parameter of the switching power supply, and determining a second adjustment step length according to the load parameter and the first adjustment step length; and in the preset adjustment mode, adjusting the switching power supply according to the second adjustment step length until the ripple amplitude of the switching power supply is within a standard amplitude range. By implementing the technical scheme provided by the invention, the effect of improving the output precision of the switching power supply is achieved.

The invention relates to a risk assessment method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: in response to a received risk assessment instruction, determining a to-be-assessed organization and a target business type corresponding to the risk assessment instruction, and obtaining to-be-assessed data of the to-be-assessed organization; inputting the to-be-evaluated data into a target evaluation model matched with the target business type, and outputting a predicted risk score through the target evaluation model, the target evaluation model being obtained by training according to a corresponding relationship between training sample data and a corresponding risk score label, the training sample data is obtained after screening by using a preset data screening strategy; and when the predicted risk score is less than a preset threshold value, determining that the to-be-assessed organization passes verification. By adopting the method, the accuracy and the reliability can be improved.

The invention discloses a key structure positioning and structured report output method and device for a CT image, and belongs to the technical field of data processing.The key structure positioning and structured report output method for the CT image comprises the steps that the 3D CT image is acquired; inputting the CT image into a trained visual encoder to obtain a high-order visual feature vector; based on the constructed vector database, matching similar images of the high-order visual feature vectors to obtain matched similar images and original structured report texts; inputting the high-order visual feature vector, the matched similar image and the original structured report text into a trained large language model decoder to obtain a preliminary structured report; and inputting the preliminary structured report into the trained key structure positioning model to obtain a structured report with position coordinates. According to the method, the output precision and the positioning precision of the model on the structured text can be effectively improved, and index measurement of a subsequent key structure is facilitated.

The invention relates to an aging correction method for a nitrogen-oxygen sensor, which comprises the following steps of: measuring and calculating an aging correction coefficient, archiving the aging correction coefficient into an aging correction module, and extracting data in real time by using the aging correction module, so that the output value of the nitrogen-oxygen sensor is corrected, and after a probe is aged, the output value of the nitrogen-oxygen sensor is corrected. A relatively accurate numerical value can still be output, namely, aging of a probe is offset by using a correction part, an aging correction coefficient can be obtained by looking up a table in combination with accumulated working time, accumulated driving mileage and daily driving working conditions after the nitrogen-oxygen sensor is loaded and parameters such as NOx and O2 concentrations measured for a long time, and the value is multiplied by an output coefficient, so that the aging correction coefficient is obtained. And the output precision can be improved.

The invention relates to a resonant gyroscope force feedback and full-angle combined control system and method. The system comprises a harmonic oscillator, a detection electrode, a buffer amplifier, an ADC, a demodulation filtering module, a gyroscope control module, a DAC and an excitation electrode. The problem that the advantages of a force feedback mode and a full-angle mode of the resonant gyroscope cannot be perfectly combined can be solved.

The invention relates to an inter-satellite optimization relative navigation method based on phase compensation and micron-order measurement, which comprises the following steps: respectively carrying out orbit numerical recursion according to states xck-1 and xdk-1 of a primary satellite and an auxiliary satellite involved in a space relative state xrk-1 at a k-1 moment, carrying out conversion to obtain a relative state prediction # imgabs0 # at a k moment, constructing a relative kinetic model, and calculating a Jacobian matrix of a relative state equation; constructing a linear Jacobian matrix of the measurement model to correct filtering error covariance, and after real measurement at the moment k is obtained, calculating a fitting residual error and a gain matrix, and calculating state update and a state covariance matrix update value; after the state is updated, the relative position and relative speed information of the primary satellite and the secondary satellite are obtained, further calculation compensation still needs to be carried out due to deviation of the antenna phase center, and finally corrected space relative navigation information is obtained. According to the invention, through on-line estimation and compensation of the phase center, the output precision of the space precision measurement load is obviously improved.

The invention discloses a data processing method and device, a nonvolatile storage medium and electronic equipment. The method comprises the following steps: acquiring work order data of a public service hotline; inputting the work order data into a target large language model to obtain hot event information corresponding to the work order data output by the target large language model, the target large language model is a large language model obtained by performing low-rank adaptation fine tuning on the pre-trained large language model according to historical work order data of the target business field, hot event information corresponding to the historical work order data and professional knowledge of the target business field; and sending the hot event information corresponding to the work order data to the target object. According to the method and the device, the technical problem of relatively high training and maintenance cost of the large language model caused by relatively high requirement on the number of parameters participating in training in a related large language model training method is solved.

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 invention relates to an integrated high-temperature-resistant lead-bismuth-resistant pressure sensor and a working method thereof, and belongs to the field of sensors, the integrated high-temperature-resistant lead-bismuth-resistant pressure sensor comprises a sensor main body and a cable output device, and the sensor main body and the cable output device are connected through a metal cable; the upper end of the cable shell is connected with the metal cable, the lower end of the cable shell is sequentially welded with the shell, the diaphragm and the threaded column with the hole to form an integrated shell structure, the graphene column is arranged in the integrated shell structure, and the upper end of the graphene column is connected with a core wire of the metal cable; the insulating tube is located in the integrated shell structure and wraps the graphene column, the lower end of the graphene column is connected with the piezoelectric ceramic and the metal gasket, the piezoelectric ceramic is completely located in the insulating tube, the metal gasket is partially located in the insulating tube, and the bottom of the metal gasket is embedded above the diaphragm; insulating rings are arranged at the contact position of the graphene column and the cable shell and the contact position of the graphene column and the shell. According to the invention, short circuit or open circuit is not easy to occur, sealing performance and performance are good, and normal operation can be continuously carried out in a high-temperature lead-bismuth environment.

The utility model relates to the technical field of gear set speed reducers, in particular to a planetary gear set speed reducer. The planetary gear train comprises a first planetary gear set and a second planetary gear set, and the first planetary gear set comprises a first inner gear ring, a first sun gear, a first planet carrier and a plurality of first planet gears; the first inner gear ring is fixedly installed on a support, and a main shaft is rotationally arranged on the support. The first sun gear is installed on the main shaft, and the first planet carrier is installed on the main shaft. The second planetary gear set comprises a second inner gear ring, a second sun gear, a second planet carrier and a plurality of second planet gears; the second inner gear ring is rotationally mounted on the bracket; the second sun gear is fixedly installed on the main shaft, and the second planet carrier is rotationally installed on the main shaft and fixedly connected with the first planet carrier. The speed reducer has the characteristics of compact structure and large reduction ratio.

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 present application discloses a constant current control circuit, method, device, equipment, medium and power supply, which utilize a first transistor to control a MOS tube, thereby realizing constant current control, and can realize high-speed dynamic response output based on the fast switching characteristic of the transistor, and utilize a second transistor paired with the first transistor and a current adjustment unit to eliminate the error introduced by the first transistor, thereby maintaining a high output accuracy while improving the high-speed dynamic response output.

The invention belongs to the technical field of parallel mechanisms, and provides a six-degree-of-freedom complete decoupling series-parallel mechanism containing a closed loop unit, which comprises a 2R parallel mechanism and a 3T1R parallel mechanism, the 2R parallel mechanism comprises a first movable platform, a first fixed platform and a first mechanism branch chain arranged between the first movable platform and the first fixed platform, the 3T1R parallel mechanism comprises a second movable platform, a second fixed platform and a second mechanism branch chain arranged between the second movable platform and the second fixed platform, and the first fixed platform is connected with the second movable platform through the second mechanism branch chain. On the basis of the spiral theory, the whole parallel mechanism is split into a plurality of sub parallel mechanisms to be designed according to the motion characteristics of the degree of freedom by adopting a method for constructing closed-loop units by decoupling sub mechanisms, the closed-loop units are contained in branches, and independent output of force and torque in the X, Y and Z directions of the movable platform is achieved; the invention further provides a construction method of the six-degree-of-freedom complete coupling parallel mechanism, and the design method and process of the complete coupling parallel mechanism are simplified.

The application provides a positioning method based on a positioning model, wherein the positioning model coordinates the work of parts of a distance prediction branch through the calculation results of a height prediction branch and a phase information prediction branch as attention signals. Compared with designing a general filter group, the filter group corresponding to the related sub-network can quickly converge for the signal under specific conditions. Compared with sub-network selection based on a gate signal (the prediction results of height or phase), the method based on probability weighting can reduce the dependence on the gate threshold. Based on the above design, the output accuracy of the trained positioning model is improved, and the problems in the prior art are solved.

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 application relates to a dual-output bandgap reference circuit suitable for a differential reference source of an analog-to-digital converter and belonging to the technical field of analog integrated circuits. The dual-output bandgap reference circuit comprises a starting circuit, a reference voltage generating circuit and a reference current generating circuit. The starting circuit adopts an inverter structure, is turned on and injects an initial starting current when a power supply is powered on, so that the core bandgap reference circuit is separated from a lockout and normally works; and the starting circuit is automatically turned off after the reference voltage is stabilized. The principle of the reference voltage generating circuit is that a positive temperature coefficient output current and a negative temperature coefficient output current are linearly superposed to generate a reference current irrelevant to temperature, and a reference voltage is generated through a resistor. The reference current generating circuit couples the reference voltage to both ends of a transistor through an operational amplifier, generates an intermediate current with the same temperature characteristic as the reference voltage, and then outputs the reference current through a current mirror in proportion, so that the reference current is obtained. The application effectively improves the output precision and stability of the reference voltage and the reference current.

The embodiment of the invention discloses a pressure sensor. The pressure sensor comprises a strain area; the supporting area is arranged on the periphery of the strain area; a substrate layer located in the strain region and the support region; the dielectric layer is located in the strain area and the supporting area and comprises a first surface close to the substrate layer and a second surface opposite to the first surface; the first metal layer is located in the supporting region and is arranged on the second surface of the dielectric layer; the variable-voltage resistance area is located in the strain area and arranged on the substrate layer, and the variable-voltage resistance area is configured to change the resistance value according to the pressure borne by the strain area; the capacitor region is located in the supporting region and arranged on the substrate layer or the dielectric layer, and the capacitor region is capacitively coupled with the first metal layer through the dielectric layer; wherein the varistor region is closer to the strain region than the capacitor region. By arranging the capacitance area surrounding the varistor, a filtering and noise reduction access of a circuit is formed, high-frequency noise of an external environment is filtered out, electromagnetic interference of equipment is reduced, and stability and output precision of the sensor are enhanced.

The present invention discloses an ADC sampling data output method, device and chip, the method comprising: after the ADC module completes periodic sampling, the sampling data obtained by sampling in the period is sent to a register; wherein the register is set in the ADC module; before the ADC module performs the next period of sampling, the register is controlled to select a universal input and output port, thereby obtaining a target universal input and output port, and the sampling data obtained by the periodic sampling is output to the target universal input and output port through the register; wherein the universal input and output ports are several. The present invention solves the technical problems of low accuracy and low efficiency of sampling data output in the prior art.

The invention discloses a split type circuit module structure of a two-wire system anti-explosion water quality monitor. The split type circuit module structure comprises a 4-20mA output control circuit module integrating a two-wire system 4-20mA output circuit and a power supply circuit, and an external acquisition circuit module used for performing analog acquisition through an MCU and outputting PWM signals for controlling the 4-20mA output circuit through the MCU, the 4-20mA output control circuit module comprises a first connector used for being connected with an external acquisition circuit module, and the external acquisition circuit module comprises a second connector used for being connected with the 4-20mA output control circuit module. And the 4-20mA output control circuit module is connected with the external acquisition circuit module by connecting the first connector and the second connector. Production and assembly are easy, the working efficiency is improved, maintenance is easy, and cost is saved.

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.

A shock wave simulation generating device disclosed by the present invention comprises a shell, a power assembly, an impact assembly and a closed cavity are arranged in the shell, the power assembly is connected with the impact assembly, the power assembly can drive the impact assembly to reciprocate, the impact assembly is connected with the closed cavity, and the closed cavity is connected with the power assembly. And the impact assembly enables the volume of the closed cavity to be increased or decreased in the reciprocating motion process, so that positive pressure or negative pressure is generated in the closed cavity to simulate the impact wave process generated by explosion. The shock wave simulation device can simulate the whole process of shock wave generation through one-button operation, has the advantages of high output precision and small human influence factor, and overcomes the defects of low precision and large misoperation due to the fact that an existing shock wave simulation device adopts manual compression of a closed cavity.

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 utility model provides a steel rail grinding machine which comprises a sliding adjusting support, a grinding head, a controller, a grinding motor, an n-shaped rotating support and a lifting adjusting mechanism, the bottom of the n-shaped rotating support is arranged on two rotating bases of the sliding adjusting support in a hinged mode, and a tilt angle sensor is fixedly arranged on the n-shaped rotating support. The lifting adjusting mechanism comprises a square frame, a first lead screw, a hand wheel, a lifting servo motor, a lifting control handle and a serial port screen, the two sides of the square frame are slidably arranged on the corresponding vertical rods in a sleeving mode, the bottom of the first lead screw is fixedly connected with the top of the square frame, and the hand wheel and the lifting servo motor are both arranged on the upper transverse plate; the grinding motor is arranged on the square frame, and the grinding head is arranged on a power output shaft of the grinding motor. The grinding machine has the function of accurately adjusting the lifting of the grinding head and also has the function of monitoring the angle in real time, so that the accurate positioning of the grinding head is favorably improved, and the grinding quality of the grinding head on a steel rail is improved.

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 invention relates to a frequency compensation type quartz accelerometer excitation drive circuit, which comprises a voltage conversion module, an excitation drive module and a frequency compensation module, and is characterized in that the voltage conversion module is connected with the excitation drive module and the frequency compensation module, and the front stage of the excitation drive module is connected with the frequency compensation module; the excitation driving module front stage is connected with the excitation driving module rear stage; the voltage conversion module is used for converting external power supply voltage into low voltage and supplying power to the excitation driving module and the frequency compensation module; the excitation driving module is connected with the quartz resonant beam to jointly form a closed loop and realize self-excitation oscillation; and the frequency compensation module is used for improving the output temperature characteristic of the quartz vibrating beam accelerometer. The driving device is high in driving capacity, high in output precision and good in stability, can directly reduce the influence of temperature on the quartz vibrating beam accelerometer, has the advantages of being simple in structure, small in number of components and easy to miniaturize, can be applied to vibrating accelerometers of similar vibrating beam structural forms, and has universality.

The present invention provides a wearable MEMS inertial sensor calibration method and device, belonging to the field of MEMS sensor technology. The present invention establishes a local search space containing different calibration value sets, and can determine the calibration value set with the highest accuracy in the previous motion state based on the difference between the heading angle of the magnetometer and the heading angle corresponding to different calibration value sets in a static state, and calibrate the next motion state with this calibration value with the highest accuracy. The present invention dynamically determines the calibration values ​​of the gyroscope and the accelerometer during the motion process, and performs real-time calibration before each motion state, thereby improving the output accuracy of the wearable MEMS inertial sensor during the motion process.