35results about How to "Improve the compensation effect" patented technology

The invention relates to the technical field of screen printing, in particular to a PCB screen printing ink layer thickness uniformity control method, system and device and a medium. The method comprises the following steps: firstly, collecting ink layer actual thickness data and screen tension data of a PCB screen printing area, then analyzing the relevance between the two data to obtain an ink layer uniformity analysis result, further determining proper compensation parameters through process compensation analysis, finally dynamically adjusting screen printing pressure, scraper angle and printing speed, bringing screen tension into a control system, and finally, controlling the screen printing uniformity. Compared with the prior art, the method has the advantages that the adaptability and the reliability are higher, and the product yield can be improved.

The invention discloses a fixed-wing unmanned aerial vehicle predetermined time cooperative path following formation control method, and relates to an unmanned aerial vehicle technology. A multi-unmanned aerial vehicle cooperative path following control strategy based on preset time stability, neural network adaptive control and preset performance control is provided; according to the method, the multiple fixed-wing unmanned aerial vehicles can realize preset time convergence of path following errors and preset time preset performance convergence of control signal tracking errors under the conditions of external disturbance and actuator faults, so that a high-precision and quick-response cooperative path following formation control task is completed; and meanwhile, the control precision and robustness are improved.

The invention provides a display substrate and a display device. The display substrate comprises a substrate body, a first transistor, a second transistor, a third transistor, a first shading layer and a second shading layer. According to the embodiment of the invention, the first transistor for detecting the ambient light intensity, the second transistor for detecting the backlight intensity and the third transistor for detecting the temperature are arranged, the first light shielding layer is used for shielding the lower parts of the first transistor and the third transistor, and the second light shielding layer is used for shielding the upper parts of the second transistor and the third transistor; therefore, the working environment parameters of the display panel can be effectively and accurately collected, and the compensation effect on the display effect is improved.

The invention provides a reactive automatic compensation device applied to a medium-voltage distribution line. The reactive automatic compensation device comprises a line compensation control unit and a line compensation unit, the uplink of the line compensation control unit is connected with the medium-voltage distribution line, and the downlink is connected with the line compensation unit; the line compensation control unit is used for acquiring the compensation capacitor capacity of the line compensation unit and calculating the reactive power of the line, and when the reactive power is greater than the compensation capacitor capacity, the capacitor of the line compensation unit is put into use by sending a closing command to the switch driving terminal in the line compensation unit with the least switch action times; when the reactive power of the line is less than zero, an opening command is sent to the switch driving terminal of the line compensation unit with the most switch action times, and the capacitor of the line compensation unit is cut off; and calculating the opening and closing time of each phase of switch at the current temperature through parabola interpolation. According to the invention, the reactive compensation capacity of the medium-voltage distribution line can be freely expanded without limitation, and the compensation effect is greatly improved.

A broadband voltage transformer error compensation method is proposed. First, a broadband test platform is constructed using a signal generator, power amplifier, standard voltage transformer, and high-bandwidth data acquisition system. The ratio and phase errors of the transformer at multiple frequency points are acquired through primary-side excitation and secondary-side synchronous acquisition. Based on the slope, first derivative, and second derivative characteristics of the error curve, the entire frequency band is adaptively divided into segments. Within each segment, multiple candidate models are fitted using a polynomial or exponential-linear combination model. The optimal model is selected based on the coefficient of determination, mean absolute error, and root mean square error. Ratio and phase error compensators are constructed based on the fitting functions of each segment, and error compensation is achieved using a feedforward approach. This method can significantly reduce amplitude and phase errors over a wide frequency range, improving the dynamic measurement accuracy of the voltage transformer.

The invention provides a straight pipe pressure balance expansion joint for space limitation, which comprises a working wave assembly, a first balance wave assembly, a second balance wave assembly and a pull rod assembly, one end of the working wave assembly is connected with an inlet pipe, the other end of the working wave assembly is connected with one end of the first balance wave assembly through an outlet pipe, and the other end of the second balance wave assembly is connected with the pull rod assembly. The other end of the first balance wave assembly is connected with the pull rod assembly, the second balance wave assembly is sleeved with the first balance wave assembly, one end of the second balance wave assembly is connected with the outlet pipe, the other end of the second balance wave assembly is connected with the third connecting pipe, and one end of the pull rod assembly is connected to the inlet pipe. The other end of the pull rod assembly is connected to the third connecting pipe, a through hole is formed in the outlet pipe, and the through hole enables a working medium to enter a cavity formed by the first balance wave assembly and the second balance wave assembly. According to the expansion joint, large axial displacement and transverse displacement can be compensated, and the structure is more compact.

The invention relates to the technical field of AUVs (Autonomous Underwater Vehicles), and particularly discloses a multi-degree-of-freedom motion compensation system and method for AUV retraction operation, the compensation system comprises a main body, the main body comprises an XY-direction compensation mechanism and a Z-direction compensation mechanism, the XY-direction compensation mechanism comprises a plurality of propellers, the Z-direction compensation mechanism comprises a hydraulic cylinder, a composite energy accumulator and a gas cylinder, the hydraulic cylinder comprises a first piston part, and the composite energy accumulator comprises a second piston part; an inner cavity of the hydraulic cylinder is divided into a rodless cavity and a rod cavity through a first piston piece, the composite energy accumulator comprises a cavity body, a fixed partition plate and a second piston piece are arranged in the cavity body, and the second piston piece comprises a first piston and a second piston which are connected with each other. The first piston, the fixed partition plate and the second piston divide the cavity into a connecting oil cavity, a first compensation oil cavity, a second compensation oil cavity and a compensation air cavity which are arranged in sequence, and communicating channels are arranged between the connecting oil cavity and the rod cavity and between the compensation air cavity and the air cylinder. A hydraulic control assembly capable of conducting bidirectional reciprocating conveying on hydraulic oil in the first compensation oil cavity and the second compensation oil cavity so as to change the oil amount in the first compensation oil cavity and the second compensation oil cavity is arranged between the first compensation oil cavity and the second compensation oil cavity. The compensation system is simple in overall structure, high in flexibility, good in compensation effect and capable of effectively ensuring the stability and safety of AUV retracting and releasing operation under complex sea conditions.

The present application relates to the field of image processing technology, and specifically to a method and system for enhancing the display effect of holographic photography, the method comprising: acquiring a digital holographic image; obtaining the holographic image focusing degree of each pixel point; then obtaining the holographic background pixel point and the holographic focus pixel point; obtaining the difference between the low pixel interval and the high pixel interval; calculating the holographic low pixel compensation parameter and the holographic high pixel compensation parameter of the digital holographic standard image; then obtaining the target amplitude balanced image; optimizing the iterative process of the holographic background pixel point and the holographic focus pixel point based on the target amplitude balanced image, and obtaining a pure phase hologram. The present application enhances the display effect of the holographic image.

The present invention provides a pixel driving circuit and a display panel, wherein the pixel driving circuit comprises a driving transistor, wherein the driving transistor comprises an output terminal, an input terminal, and a control terminal, wherein the driving transistor is configured to generate a driving current in a light-emitting stage to drive the light-emitting device through the output terminal electrically connected to the light-emitting device; a compensation module is configured to detect and compensate for a threshold voltage of the driving transistor in the compensation stage; and an over-detection module is configured to adjust the threshold voltage detected and compensated by the compensation module in an over-detection stage after the compensation stage, wherein the threshold voltage detected and compensated by the compensation module is adjusted in the over-detection stage through the over-detection module, so that the threshold voltage detected by the compensation module is greater than the actual threshold voltage of the driving transistor, thereby compensating for the threshold voltage information lost due to parasitic capacitance and the like during compensation, thereby improving the compensation capability of the internal compensation circuit.

The invention discloses a three-axis position-adjustable landing gear uplock pin fixing base device. The upper lock pin is rigidly connected with the upper lock pin seat, the mounting ring is rigidly connected with the upper lock pin seat pressing plate, and the tooth-shaped plate is arranged between the upper lock pin seat platform and the upper lock pin seat pressing plate; by adjusting the relative meshing position of the tooth-shaped plate and the upper lock pin seat pressing plate, the relative position of the upper lock pin seat and the mounting ring in the X direction is changed; the relative positions of the upper lock pin seat and the mounting ring in the Y direction are changed by adjusting the number of the first adjusting gaskets clamped between the upper lock pin seat and the mounting ring; the relative positions of the upper lock pin seat and the mounting ring in the Y direction are changed by adjusting the number of the second adjusting gaskets clamped between the upper lock pin seat and the mounting ring. Therefore, the locking reliability of the undercarriage is improved, and the defects that the position of a traditional undercarriage uplock pin fixing and mounting device can only be adjusted in two directions, and the position of the uplock pin of the undercarriage cannot be accurately adjusted are overcome.

The invention belongs to the technical field of motion control of unmanned vehicles, and particularly relates to a robust tracking control method for a differential unmanned vehicle under actuator damage and mass change, which comprises the following steps of: 1, establishing a kinematics model and a dynamics model for the differential unmanned vehicle, qualitatively analyzing the influence of the efficiency damage and the physical quality damage of the actuator in the kinematic model and the dynamical model; 2, designing control inputs with estimated values for the left actuator and the right actuator; step 3, designing a segmented updating law for the estimator, and estimating uncertainty introduced by efficiency damage and physical quality damage of the actuator; and 4, designing a flag bit switching mechanism based on event triggering, and switching the estimator working interval. According to the method, the differential unmanned vehicle can realize stable trajectory tracking under certain actuator efficiency damage and physical quality damage.

Provided are a signal frequency offset compensation method, network device and apparatus, the method being applied to the network device, the method comprising: acquiring a reference frequency offset value of a first RRU, the first RRU being an RRU to which a target terminal belongs currently in a plurality of RRUs; determining frequency offset index data of the target terminal, the frequency offset index data comprising a moving direction of the target terminal relative to the plurality of RRUs, or a pilot signal frequency offset value of the first RRU; determining a target frequency offset value of the first RRU according to the frequency offset index data, or determining the target frequency offset value of the first RRU according to a reference frequency offset value of the first RRU and the frequency offset index data; and according to the target frequency offset value of the first RRU, performing frequency offset compensation processing on an uplink signal of the target terminal received based on the first RRU. According to the scheme provided by the invention, the frequency offset measurement in a high-speed mobile scene can be realized without increasing the overhead of a pilot signal.

The present invention belongs to the technical field of pipeline compensators, and particularly relates to an anti-settling and anti-seismic corrugated compensator and a processing technology thereof; wherein the compensator comprises a middle pipe; a bellows, wherein two bellows are respectively arranged at the two ends of the middle pipe; an end pipe, wherein an end pipe is respectively arranged on the outside of each bellows; a ring plate, wherein a ring plate surrounding the outer wall of the end pipe is formed on each end pipe; a small tie rod, wherein a plurality of support ears evenly distributed along the circumference are arranged at a position of the middle pipe close to the ring plate, and a small tie rod is arranged between the support ears and the ring plate; a retaining frame, wherein a plurality of retaining frames abutting against the bellows are arranged on each small tie rod; the bellows compensator performs two-stage compensation through the bellows on both sides of the middle pipe, thereby improving the compensation effect of the bellows compensator.

The application relates to the technical field of artificial intelligence, and discloses a large model construction method, device, equipment and medium, the method comprising the following steps: performing block processing on a Transformer weight matrix of a target model to form a plurality of sub-matrices; performing low-rank approximation on each sub-matrix through two-dimensional Kronecker decomposition to obtain the Kronecker product of two small matrices corresponding to each sub-matrix; freezing the parameters of all the small matrices, using LoRA to obtain additional parameters corresponding to all the small matrices to obtain a two-dimensional Kronecker-LoRA compression model; taking the target model as a teacher model, and using a data set to train the two-dimensional Kronecker-LoRA compression model to obtain a large model. The method can reduce the parameter size and resource demand of an existing large model, form a suitable large model, effectively reduce performance loss, achieve a balance between high compression rate and high precision, adapt the dynamic reasoning and image processing process depth, and facilitate wide deployment on edge devices.

The present invention discloses a flexible capacitor switching current limiter, which belongs to the technical field of reactive power compensation equipment. It includes power capacitors, NTC thermistors, inductors, DC fans, and bypass diodes; there are three groups of power capacitors, and the A, B, and C phases of the three-phase power supply are respectively connected to a corresponding group of power capacitors through a group of NTC thermistors, and the other ends of the three groups of power capacitors are connected together; a group of DC fans is connected between each group of NTC thermistors and the corresponding group of power capacitors, and a group of inductors are respectively connected in series at the other end of each group of DC fans, and the other ends of the three groups of inductors are connected together, and a group of bypass diodes are respectively connected in parallel with reverse polarity at both ends of each group of DC fans; the air outlet direction of each group of DC fans points to the corresponding NTC thermistor. It has the characteristics of low cost, good inrush current suppression ability, and fast recovery time.

The invention relates to the technical field of salt spray tests, in particular to a spraying device for a salt spray test, which comprises a salt water tank, a water control float valve, a tank cover, a spray tower, a glass spray head, a filter, a conical disperser, a support rod, a floating plate and a water inlet float valve, the floating plate is connected to the lower portion of the supporting rod and located in the saline water tank, the water inlet floating valve is installed on the inner wall of the saline water tank and located above the water control floating valve, and a pressure discharge cavity is formed in the saline water tank and located under the floating plate; the height of the conical disperser is controlled by using the salt water liquid level in the salt water tank, and the conical disperser is used for collecting the settled salt water to reduce the residual amount of the salt water in the salt water tank, so that the spraying amount at the initial stage of the salt spray test is accurately compensated, and the salt water discharge amount of the salt water tank at the last stage of the test is increased, thereby ensuring the test accuracy and improving the test efficiency. And the test cost is reduced.

The invention discloses a high-precision occlusion target identification method based on data enhancement, and mainly solves the problem of low occlusion target identification precision in the prior art. The method comprises the steps of performing adversarial training on an original image data set subjected to standardization preprocessing through a multi-scale discriminator, and constructing an enhanced training data set; designing a multi-scale feature extraction layer, a bidirectional feature pyramid fusion layer and a prediction output layer to realize multi-level integration of shielding features; a composite loss function and a progressive multi-scale training strategy are adopted to collaboratively optimize the network, and the robustness of the model to a shielding target is improved in stages; and a high-precision detection result is output through three-stage filtering. The target identification accuracy under the shielding scene is obviously improved, and the method is suitable for the fields of automatic driving, security and protection monitoring and the like.

The application provides a high-precision laser position detection dynamic compensation method and system, and relates to the technical field of visual detection.The method part comprises the following steps: setting a fixed-length time window, collecting vibration interference related characteristic data of the equipment in each time window; preprocessing the collected vibration interference related characteristic data, and calculating and obtaining a vibration interference intensity index; constructing a light spot three-dimensional coordinate data set and a feature mark three-dimensional coordinate data set; constructing a conversion function, calculating a deviation index in the fixed time window; setting a vibration interference intensity threshold and a deviation threshold, and making a decision judgment on the compensation mode.The application can not only detect the position deviation size between the light spot and the target, but also further analyze whether the deviation is caused by external vibration interference or other non-vibration reasons, so that blind compensation or misjudgment is avoided, the deviation source can be distinguished, the compensation effect is improved, and misoperation is reduced.

The present application relates to three coordinate measuring machine error compensation field, especially in kind based on nonlinear interpolation algorithm three coordinate measuring machine positioning error compensation method. Including in the verification direction according to the preset rule creates multiple verification points;According to the preset scheme, the three coordinate measuring machine is moved to each verification point in turn, and the positioning error value at each verification point is measured by using laser interferometer;The obtained each positioning error value is stored in the error table file;The error space is divided into several error data units;The coordinate value of the actual measurement point is obtained, and the vertex of the error compensation data unit containing the actual measurement point is taken out from the error table file;The positioning error value of the actual measurement point is calculated by nonlinear interpolation algorithm, the calculated positioning error value is added to the coordinate value of the actual measurement point, and the compensated coordinate value of the actual measurement point is obtained, which aims at solving the problems of poor positioning error compensation effect and low error compensation efficiency of three coordinate measuring machine.

The utility model relates to the field of air slip rings, in particular to an air slip ring mechanism of friction stir welding equipment, which comprises an inner ring, an outer ring and two sealing rings, two first mounting grooves are arranged on the inner wall of the outer ring at intervals, and the sealing rings are slidably arranged in the first mounting grooves. The inner ring is sleeved with the sealing ring, the sliding direction of the sealing ring is the same as the axial direction of the outer ring, the inner ring is sleeved with the outer ring, a second installation groove is formed in the outer wall of the inner ring, the sealing ring makes contact with the second installation groove, and an air groove is further formed in the outer wall face of the inner ring. According to the utility model, through the arrangement of the sealing ring, the compensation of the position of the sealing ring can be realized through the power of the first spring under the condition of relatively large vibration, so that relatively good sealing performance can still be kept; in addition, due to the arrangement of the contact blocks, the compensation capacity for dislocation between the inner ring and the sealing ring is improved, and the sealing performance is further improved.

The invention discloses a temperature compensation control system for a laser engraving machine based on multi-source temperature data fusion, comprising: a temperature acquisition module, comprising a plurality of temperature sensors arranged at key positions of the laser engraving machine, for acquiring overall temperature field distribution data; an algorithm module, comprising: an improved Kalman filter algorithm, for eliminating temperature data noise; a multi-point weighted fusion algorithm, for performing spatial distribution fusion calculation on multi-point temperature data; a thermal deformation prediction algorithm, integrating heat conduction, natural convection and radiation heat transfer models, for predicting overall system temperature changes; an adaptive compensation algorithm, for dynamically adjusting PID parameters according to real-time error feedback; and a compensation execution module, for performing real-time position compensation on the laser engraving machine according to the compensation amount output by the algorithm module.

The utility model discloses a flexible connecting element for finned tubes of a gasifier and the gasifier, and relates to the technical field of gasifiers. When the finned tube connecting structure is installed, fins of the finned tubes are connected to the finned tube connecting structure, when the vaporizer works, the finned tubes expand with heat and contract with cold, due to the fact that the connecting plate is arranged at the position of the deformation groove, when the finned tubes act on the connecting plate, the deformation groove deforms, and then expansion with heat and contraction with cold of the finned tubes are supplemented. And due to the arrangement of the deformation groove, the deformation amplitude is increased, the compensation capability of the connecting element is improved, the common industrial phenomenon that the joint of the connecting element and the finned tube is cracked due to insufficient compensation in the prior art is solved, and the connection strength and the overall safety of equipment are completely achieved.

The invention discloses a nuclear magnetic resonance shimming coil topology optimization method and device based on depth prior, and relates to the field of nuclear magnetic resonance coil design, and the method comprises the steps: S1, determining a design domain, a design variable and a target detection region; s2, establishing an incidence relation between the magnetic field intensity of the target detection area and a design variable; s3, performing finite element grid discrete division on the design domain, determining boundary conditions and constraint conditions, and constructing a target function; and S4, inputting the random variable into a preset deep neural network model, using an objective function as a loss function, performing parameter iteration of the deep neural network model by using an optimization algorithm, and outputting an optimized shim coil configuration. The depth prior technology is introduced into shimming coil topological optimization, performance optimization of a coil structure can be effectively improved, sensitivity does not need to be analyzed, and therefore the magnetic field compensation accuracy and efficiency of a complex morphology detection area are improved; and a coil structure data set does not need to be constructed in advance for training, so that the applicability is improved.

The present invention discloses a thermal error compensation method for a five-axis CNC machine tool considering tool wear, comprising: collecting temperature data of each monitoring point, measuring the position change between the tool cutting point and the workpiece to obtain thermal error data, collecting acceleration signals, and measuring tool wear values; (2) standardizing the collected temperature data to screen out temperature sensitive features that are highly correlated with thermal errors; (3) using an SVM model to establish a nonlinear mapping relationship between temperature sensitive features and thermal errors; (4) preprocessing the acceleration signal to train a tool wear monitoring model; (5) introducing a Sigmoid correction function based on the SVM model to obtain a thermal error compensation model; (6) using a Bayesian optimization algorithm to optimize the parameters in the SVM model and the Sigmoid correction function; and using the optimized thermal error compensation model to compensate for the thermal error of the machine tool in real time. The present invention can meet the demand for high-precision thermal error compensation in a long-term processing environment.

The invention discloses an ink-jet printing stripe defect compensation method, and belongs to the technical field of digital ink-jet printing. The method comprises the following steps: S1, acquiring halftone image data to be printed; s2, determining pixel columns with stripe defects in the image; s3, for each pixel with defects, calculating an average gray value M in an n * n pixel grid taking the pixel as a center; s4, selecting a corresponding compensation mode according to the range of the average gray value M; s5, according to the selected compensation mode, dynamic point compensation is carried out on the defective pixel and the surrounding pixels of the defective pixel; s6, performing chromatic aberration compensation on the compensated image; and S7, outputting the compensated halftone image data. According to the method, the most suitable compensation mode can be adopted for defect areas in different density ranges, and the visual effect of stripe defects is effectively improved; the perception characteristic of human eyes on colors is fully considered, so that the compensated printing effect is closer to an ideal state; and multi-channel cooperative compensation is realized.

The invention provides a display substrate and a display device. The display substrate comprises a substrate body, a first transistor, a second transistor, a third transistor, a first shading layer and a second shading layer. According to the embodiment of the invention, the first transistor for detecting the ambient light intensity, the second transistor for detecting the backlight intensity and the third transistor for detecting the temperature are arranged, the first light shielding layer is used for shielding the lower parts of the first transistor and the third transistor, and the second light shielding layer is used for shielding the upper parts of the second transistor and the third transistor; therefore, the working environment parameters of the display panel can be effectively and accurately collected, and the compensation effect on the display effect is improved.

This invention discloses a three-dimensional implicit modeling method for deep mineralization prediction based on the fusion of multi-source geophysical and geochemical data, belonging to the interdisciplinary field of geological exploration and artificial intelligence. Addressing the shortcomings of existing methods, such as rasterization destroying data topology and the lack of geological process constraints in the implicit field, this invention constructs a cross-modal geological coupling graph containing causal edges of geological processes, and uses graph neural networks for relation-aware encoding; furthermore, it constructs an implicit neural field with geological semantic constraints, aligning the direction of the mineralization potential gradient with the direction of geological action mechanism transmission; and dynamically evolves and optimizes the graph structure during training, achieving adaptive adjustment of edge weights and topology pruning growth. This method realizes end-to-end generation driven by geological processes from discrete heterogeneous sampling to continuous three-dimensional implicit mineralization fields, significantly improving the geological interpretability and predictive stability of deep mineralization prediction.

The application provides a dynamic prediction method for a coal-fired power plant SCR denitration system based on a parameter identification mechanism-data hybrid model, and relates to the technical field of intelligent modeling and prediction. x The mechanism prediction value of the NO x The application establishes an SCR dynamic mechanism model, completes parameter identification based on historical operation data, obtains the mechanism prediction value of the NO x Concentration and ammonia escape amount, constructs a series model of liquid neural network and long short-term memory network to learn the mechanism model prediction deviation, weights and fuses the mechanism prediction value and the prediction deviation, forms a hybrid model with physical consistency and dynamic adaptability, and realizes high-precision and stable prediction of the SCR outlet NO x Emission and ammonia escape amount under variable load conditions.

This utility model relates to the field of wind power testing technology and discloses a connecting rod coupling for a wind power test bench, solving the problems mentioned in the background art. It includes: a connecting rod coupling for connecting a power source and the test equipment, capable of transmitting power and compensating for deviations during operation; a left transition flange weldment connected to one end of the connecting rod coupling for connecting to the power source; a right transition flange assembly weldment connected to the other end of the connecting rod coupling for connecting to the test equipment; and a tie rod middle section connecting the left and right transition flange weldments, the tie rod middle section providing tension to maintain the structural stability of the coupling. This utility model achieves high load-bearing capacity, efficient deviation compensation, and significant buffering and vibration reduction effects, effectively ensuring the stability and reliability of the wind power test bench during long-term, high-load operation.

The utility model relates to metal bellows compensator technical field, concretely relates to a metal bellows compensator with adaptive adjustment function, include, top pipe and bottom pipe, bottom pipe and top pipe are connected fixed through the bellows pipe between, the outside fixed location ring of top pipe, the outside of location ring is equipped with the location hole, the outside fixed compensation structure of bottom pipe, compensation structure includes two groups of side plate, the connecting block of setting in side plate and the screw rod of setting in connecting block, the end of screw rod sets up in location ring, prevents the screw rod from loosening because of vibration and other factors during operation, simultaneously, the side plate is L type structure and symmetrically sets up outside bottom pipe, the connecting block is clamped and sets up in the groove body of side plate, and this kind of structure design can limit the moving direction of connecting block, guarantees the stability of adjustment process, further enhances the connection reliability between top pipe and bottom pipe, significantly reduces the risk of pipeline medium leakage, improves the security of industrial pipeline system operation.