27results about How to "Realize dynamic compensation" patented technology

This application relates to the field of scanner image acquisition technology, and in particular to a method and apparatus for dynamic compensation of exposure time of a reverse-side CIS sensor. The method is applied to a duplex automatic document feeder scanning system, which is equipped with independent CIS sensors for the front and back sides to achieve synchronous scanning of the front and back sides. The method includes: upon receiving a duplex scanning task instruction initiated by a user, obtaining the current relative luminous intensity of the reverse-side CIS sensor LED based on the current cumulative illumination time of the LED and a pre-stored attenuation curve model of the reverse-side CIS sensor LED; obtaining the compensated exposure time based on the current relative luminous intensity and pre-stored initial parameters of the reverse-side CIS sensor; and controlling the reverse-side CIS sensor LED to illuminate according to the compensated exposure time, thereby achieving exposure compensation and image quality maintenance of the reverse-side image during duplex scanning.

The invention discloses a coherent optical frequency signal regeneration amplification system based on optical fiber transmission. The coherent optical frequency signal regeneration amplification system comprises a local narrow linewidth laser which outputs narrow linewidth laser; the first optical fiber coupler couples the narrow linewidth laser to the first acoustic optical modulator and the second acoustic optical modulator respectively; the output of the first acousto-optic modulator and superior transmission light are jointly coupled into a photoelectric detector by a second optical fiber coupler to generate a beat frequency signal; the signal processing module samples the beat frequency signal after conditioning the beat frequency signal, performs phase discrimination on the sampled signal and the digital reference signal to generate an error signal, and generates a first feedback signal and a second feedback signal according to the error signal to be respectively used by the local narrow linewidth laser and the first acousto-optic modulator; performing real-time cycle slip detection on the error signal and repairing a phase abnormal point to generate a third feedback signal to be used by a second acousto-optic modulator; and the second acousto-optic modulator outputs amplified regenerated laser. According to the invention, high-precision optical frequency signal transmission can be realized in a complex and changeable optical fiber environment with large noise.

This utility model relates to the technical field of tension adjustment devices, specifically a tension adjustment device for the production of flame-retardant needle-punched fabric. Its purpose is to solve the problem that existing tension rollers require height adjustment when guiding needle-punched fabrics of different specifications. However, the adjustment of the tension roller is cumbersome and time-consuming, achieved by raising and lowering screws on a bracket. Therefore, this new device improves the efficiency and effectiveness of the tension adjustment, thus enhancing its practicality. The device includes a tension roller, a rotating shaft, and fixed plates. The rotating shaft is fixedly mounted to the tension roller, and both sides of the rotating shaft are rotatably connected to corresponding fixed plates. The tension roller is guided and pressed by the flame-retardant needle-punched fabric. A pre-tightening mechanism is provided at the bottom of the two sets of fixed plates. The pre-tightening mechanism also includes a sliding block, a lifting plate, a limiting plate, and a spring. A groove is provided at the top of the lifting plate, and a working cavity is provided at the bottom of the groove.

The invention relates to the technical field of data transmission, and discloses a wireless self-calibration high-precision mine pressure sensor device and an accurate data transmission method thereof, and the method comprises the steps: carrying out the periodic or triggering correction of the zero point and sensitivity of a pressure sensitive part through an embedded self-calibration unit, so as to maintain the long-time measurement accuracy; in a data transmission link, a specific channel coding and error correction mechanism is used for packaging pressure data, and the pressure data is sent to a receiving end in an anti-interference modulation mode. According to the invention, negative effects of underground high-humidity and strong-vibration environments on sensor attributes and wireless signal transmission are overcome, and accurate acquisition and reliable return of mine pressure data are realized.

The method comprises obtaining text information to be sent, mapping the text information through word embedding to obtain a vector sequence of discrete words in the text information, encoding the vector sequence to obtain semantic representation information of the text information, performing nonlinear mapping conversion on the semantic representation information to obtain symbol vector information of the text information, performing adaptive denoising based on a signal-to-noise ratio on the symbol vector information to obtain a corrected signal, and sending the corrected signal. The technical scheme provided in the embodiments of the present disclosure realizes explicit modeling and dynamic compensation of channel noise through adaptive denoising based on a signal-to-noise ratio, and also discards high delay, high complexity and bandwidth waste caused by repeated retransmission in a poor channel through an end-to-end strong robustness design.

The invention relates to the technical field of pipeline safety monitoring, and discloses a thermal stress self-adaptive compensation method for an external heating pipeline of a BOPP film production line, which comprises the steps of high-temperature-resistant sensor arrangement and data acquisition, temperature-strain-vibration decoupling and basic parameter calculation in a high-temperature environment, and a BOPP production line exclusive multi-load coupling stress calculation model. The invention relates to an integrated technical path of multi-section hinge type corrugated pipe compensator parameter optimization, self-adaptive compensation adjustment and double-closed-loop iteration optimization, and high-temperature-resistant multi-dimensional sensing monitoring-parameter linkage type stress calculation-high-frequency response corrugated pipe compensation optimization-stress-thin film thickness double-closed-loop iteration. The thermal stress self-adaptive compensation of the external heating pipeline of the BOPP film production line under the working conditions of high temperature of 200-250 DEG C and high-frequency load is realized.

The application discloses an energy-saving gasoline generator set for heat separation discharge, and relates to the technical field of generators, which comprises a base, a shielding box, a gasoline generator set device, a dustproof and dehumidifying structure, a backflow air duct and a heat dissipation mechanism, wherein the heat dissipation mechanism comprises an air inlet duct, a first air duct and a second air duct which are arranged in the inner side wall of the shielding box; the first air duct comprises a plurality of air outlets which are uniformly arranged at the bottom of the side wall of the shielding box and are used for precooling the bottom through the cold air sinking principle; the second air duct is provided with a plurality of air outlets which are used for targeted and accurate cooling of different heat generation areas of the gasoline generator set device; a capsule for actively compensating the suction of cold air power and a self-adaptive component for targeted and rapid cooling according to the position of the part in different heat generation states are fixed in each chamber; and the energy-saving gasoline generator set can realize the technical effects of improving heat dissipation uniformity, optimizing heat dissipation resource distribution, ensuring sufficient heat dissipation power, improving flexibility and improving heat dissipation efficiency.

The invention provides an offshore wind power operation and maintenance method and system based on a digital twinning technology, and relates to the technical field of offshore wind power operation and maintenance methods, and the method comprises the steps: calculating the maximum theoretical power of a fan according to the Betz limit definition; converting a dynamic ratio of wind energy efficiency conversion into a difference equation by adopting forward Euler discretization, and constructing a state space model by adopting Kalman filtering to update the wind energy conversion efficiency of each sampling point; and constructing a dynamic threshold value of the wind energy conversion efficiency by adopting an exponential weighted movement method. The air density is dynamically corrected through a temperature compensation method, so that theoretical power calculation better fits the real atmospheric environment where the fan is located; kalman filtering is adopted to solve the discretized state space model, and prediction and actual observation values of the mechanism model can be optimally fused; a dynamic threshold value is generated by adopting an exponential weighted moving method, and the threshold value can be adaptively adjusted along with the long-term trend and short-term fluctuation of the wind energy conversion efficiency.

This invention discloses an intelligent walking and positioning system and control method for hanging baskets in bridge construction. This invention relates to the field of bridge construction technology, constructing a multi-module collaborative system to achieve coupled driving of walking and anchoring, safety interlocking of the rear anchor, and dynamic positioning under all working conditions. Through digital twin predictive control, it solves the pain points of traditional hanging basket operations. The advantages of this invention are: through the collaborative design of the walking and anchoring driving module and the decoupled and re-anchored rear anchor module, combined with the safety interlocking logic of the central control module, it optimizes the inherent defects of traditional hanging baskets, such as mutual exclusion between walking and anchoring, lack of active safety redundancy during walking, poor synchronization of multiple jacking mechanisms leading to deviation and jamming, and cumbersome rear anchor disassembly and assembly procedures. It adopts a step-by-step driving architecture with coupled walking and anchoring, combined with a two-level linkage decoupled and re-anchored rear anchor structure, to achieve dynamic anchoring and locking throughout the entire walking process of the hanging basket. Simultaneously, the central control module achieves synchronous control of multiple trusses and safety interlocking throughout the entire operation process.

The yarn tensioner for the warp knitting machine comprises a base and further comprises a stand column, a sensor base, a pressure sensor, a tension platform, a controller, a displacement adjusting mechanism and a yarn guide ball, the stand column is perpendicularly and fixedly connected to the side wall of the base, the sensor base is fixed to the lower portion of the stand column, the pressure sensor is integrated in the sensor base, and the tension platform is connected with the controller. The tension platform is assembled on the sensor base in a sliding mode through a linear guide rail and makes contact with the pressure sensor to form a pressure feedback interface, the tension platform is used for bearing yarn, the displacement adjusting mechanism is movably arranged on the base through a sliding rail, and the yarn guide ball is rotationally assembled at the tail end of the displacement adjusting mechanism. The displacement adjusting mechanism can drive the yarn guide ball to apply controllable radial pressure to the yarn so as to adjust the tension of the yarn, and the controller is arranged on the base, electrically connected with the pressure sensor and used for controlling the displacement adjusting mechanism to drive the yarn guide ball to adjust the position.

The application discloses a guar gum composition for oil field exploitation and a preparation method thereof, and relates to the technical field of guar gum. The method comprises the following steps: alkalizing, cation etherizing and copolymerizing AM-AMPS with natural guar gum to obtain an organic modified guar gum; introducing active groups through a silane coupling agent KH-560; and finally, carrying out in-situ sol-gel reaction with SiO2-TiO2 composite precursors to form an organic-inorganic interpenetrating network structure. The guar gum composition has good structural stability and viscosity retention capacity at high temperatures, and is suitable for fracturing construction of deep high-temperature oil and gas reservoirs.

The invention discloses an SAA-DoA high-precision direction finding method based on LSTM time sequence prediction, and the method comprises the following steps: sequentially switching a plurality of antenna units through a sequential sampling mode of a switch antenna array, and obtaining the signal sampling data of a target direction; performing phase processing on the signal sampling data, and extracting an instantaneous frequency time sequence representing carrier frequency drift; inputting the instantaneous frequency time sequence into a pre-trained long short-term memory network model, learning a dynamic change rule of carrier frequency drift through the model, and predicting an instantaneous frequency value of an unsampled time slot; based on the predicted instantaneous frequency value, reconstructing a complete parallel sampling data matrix through phase integral operation; based on the reconstructed parallel sampling data matrix, an array signal processing algorithm is adopted to calculate the arrival angle of the signal; according to the method, the precision of DoA estimation under the SAA architecture and the robustness in a real wireless environment are remarkably improved.

The invention relates to the technical field of SMT, and discloses an SMT quality control method and system, and the method comprises the steps: calculating a PCB rotation deviation angle and a PCB translation deviation, and superposing the PCB rotation deviation angle and the PCB translation deviation for a target mounting point coordinate, and obtaining a component position deviation value; when the position deviation value of the component exceeds an allowable deviation threshold value, calculating an additional displacement value generated by the rotation action, and deducting the additional displacement value from the position deviation value of the component to obtain a comprehensive compensation displacement value; and a rotation instruction is sent to a rotating head servo motor according to the component position deviation amount, a stepping pulse signal is sent to a gantry stepping motor according to the comprehensive compensation displacement amount, and a rotating head and a gantry execute compensation actions in parallel to complete component alignment. The problem that in the prior art, fixed coordinate mapping cannot adapt to PCB position changes is solved, the double-gantry cooperation efficiency is improved, and the overall production period is shortened.

The utility model discloses an on-line non-stop convenient terminal feeding mechanism, which comprises a feeding assembly, a terminal crimping machine is arranged on one side of the feeding assembly, a wire clamp assembly is arranged on the opposite side of the terminal crimping machine, the feeding assembly comprises a winding module, a guide module and a moving module, the guide module is connected with the moving module, and the wire clamp assembly is connected with the winding module. The winding module is installed on the bottom face of the workbench and comprises a terminal disc, a material belt paper winder and a terminal disc supporting arm, the terminal disc is used for collecting wound terminal material belts and is rotationally connected with one end of the terminal disc supporting arm, and the material belt paper winder is used for driving the terminal disc to rotate and enabling the terminal material belts to be wound out to the guiding module; the moving module comprises a rodless cylinder, a reset tension spring and a first guide rail, the rodless cylinder is used for driving the guide module to perform synchronous displacement adjustment along with the terminal crimping machine, the reset tension spring is used for providing tension to assist the guide module in resetting, and the first guide rail is slidably connected with the guide module.

The present application relates to the technical field of endoscopes, in particular to a micro endoscope and an ultrasonic detection probe for pipeline welds in narrow spaces, comprising a wiring module and a probe module. The micro endoscope integrates the ultrasonic detection probe, realizes dual-mode detection of "optics + ultrasound", and can complete surface and internal detection in a single insertion. The wiring module and the braided curved probe pipe are tightly connected through a connecting mechanism, which is convenient to disassemble and assemble. The setting of the capsule fastener satisfies the assembly connection of the connecting cover body and the probe mounting seat, and also satisfies the limiting function of the lead wire. Through the combination of the limiting support assembly and the elastic compensation assembly, the excessive twisting of the lead wire of the ultrasonic detection probe and the braided curved probe pipe is avoided when turning, the minimum bending radius is increased, dynamic compensation is realized when bending, the minimum bending radius is limited, and the efficiency and accuracy of detection are improved.

The utility model discloses a four-head riveting machine for an automobile seat framework, and relates to the technical field of automobile part manufacturing equipment. The device comprises a machining table, the machining table is obliquely arranged, a mounting plate is arranged on the machining table, a machining unit is arranged on the mounting plate, the machining unit comprises a clamping mechanism, the clamping mechanism is correspondingly provided with a riveting mechanism, a sliding plate is further arranged between the machining table and the mounting plate, and the sliding plate is connected with the mounting plate. The air cylinder pulls the sliding plate to enable the workpiece to be smoothly separated from the clamping mechanism. The utility model has the beneficial effects that the inclined machining table design is adopted, so that the operation height of an operator better accords with ergonomics, and the fatigue of long-time operation is effectively relieved; the automatic demolding mechanism of the sliding plate is driven by the air cylinder, automatic separation of the workpiece and the clamping system after riveting is completed is achieved, manual knocking demolding is not needed, the risk of surface scratching caused by manual knocking demolding is also avoided, and the demolding efficiency is improved.

The application discloses a kind of heat deformation compensation systems for segmented aluminum-coated shutter of coating machine, it is related to advanced non-ferrous metal material technical field, can solve the heat deformation compensation system of segmented aluminum-coated shutter of coating machine at present stage, because of lacking the precise analysis and compensation lag evaluation of local thermal load and thermal deformation coupling, leading to the technical problems of insufficient compensation accuracy, film thickness instability, comprising: data acquisition module is used to obtain multidimensional detection data;Thermal deformation correlation analysis module is used to determine the effective thermal deformation sensitivity of segmented shutter according to multidimensional detection data;Compensation delay evaluation module is used to determine the delay index of heat deformation compensation system according to the execution response time and decision lag time of heat deformation compensation system;Compensation decision and execution module is used to determine compensation decision and execution according to effective thermal deformation sensitivity and delay index.The application is used for the heat deformation compensation of segmented aluminum-coated shutter of coating machine.

The application discloses a kind of full-automatic carrying robot of potted flower flowerpot, including walking and moving mechanism, flowerpot clamping mechanism, sensing and positioning system, navigation system and flowerpot placing system;Walking and moving mechanism is used to drive robot to move and adapt to topography fluctuation;Flowerpot clamping mechanism includes mechanical arm and clamping device, for performing the grabbing, lifting and releasing operation to flowerpot;Sensing and positioning system includes camera and laser radar, for identifying and positioning target flowerpot;Flowerpot placing system is electrically connected with walking and moving mechanism, flowerpot clamping mechanism and sensing and positioning system respectively, for controlling walking and moving mechanism and flowerpot clamping mechanism according to the information of sensing and positioning system, complete the autonomous grabbing and placing of flowerpot;Navigation system combines boundary line identification to carry out path planning and decision-making, realize the autonomous navigation of robot.The application realizes the full autonomous identification, grabbing, transport and placing of potted flower flowerpot by multi-sensor fusion and visual navigation technology.

The application is suitable for the field of LED display screens, and discloses a dynamic compensation method, device and equipment for power supply voltage of an LED display screen and a storage medium. The dynamic compensation method for power supply voltage of the LED display screen comprises the following steps: obtaining a predicted load current of at least one target module of the LED display screen; calculating a predicted line loss voltage drop corresponding to the target module according to the predicted load current; generating a compensation voltage instruction for the output of the power supply according to the predicted line loss voltage drop; and outputting the compensation voltage instruction to adjust the output voltage of the power supply based on the compensation voltage instruction. The application reduces the occurrence of display abnormal phenomena such as uneven brightness, color deviation or black screen caused by voltage drop.

This invention relates to the field of mold price prediction technology, and in particular to a mold price prediction method based on multi-dimensional data fusion. A hybrid neural network model combining Transformer and LSTM is constructed. The global attention mechanism of the Transformer module is used to deeply mine the complex relationships between high-dimensional static features, while the LSTM module captures the temporal evolution patterns of historical prices. The two types of features are effectively fused, significantly improving the accuracy and stability of mold price prediction. Through a pre-processing layer and attention heads that process features of specific categories, the model is guided to perform structured modeling based on feature categories in the early stages of learning. This effectively distinguishes and focuses on the dependencies within different categories of features, such as static attributes, process attributes, and temporal costs, reducing noise interference between irrelevant features and improving the interpretability, efficiency, and generalization ability of the model's feature association learning.

This application relates to the field of CNC machine tool technology, specifically to a method, system, device, and medium for positioning compensation of a universal milling head spindle in a mechanical double-swivel CNC machine tool. The method includes: acquiring a first transmission coefficient between the A-axis and the spindle, and a second transmission coefficient between the C-axis and the spindle; setting the A-axis and C-axis to a zero-degree position, and determining the initial target angle for positioning the universal milling head spindle based on the machining task objective; executing machining motions using the mechanical double-swivel CNC machine tool based on the machining task objective, and during the process, reading the current angle values ​​of the A-axis and C-axis relative to the zero-degree position in real time; calculating the real-time system positioning angle of the spindle; and executing spindle positioning commands in real time during the machining motion to control the spindle to rotate to the real-time system positioning angle. This application calculates and compensates for the influence of the A-axis and C-axis on the spindle angle in real time, enabling precise positioning of the spindle under various swivel angle postures.

The invention relates to a semiconductor carrying equipment motion control method and device and computer equipment. The method comprises the steps that the real-time driving state of the carrying equipment is obtained; if the real-time driving state represents the linear driving state, the accumulated driving mileage of the first wheel and the accumulated driving mileage of the second wheel of the carrying equipment are obtained respectively; the first wheel and the second wheel are arranged on different sides of the carrying equipment; respectively determining the current driving speeds of the first wheel and the second wheel according to the accumulated driving mileages of the first wheel and the second wheel; acquiring a vehicle body target speed of the carrying equipment; determining a to-be-adjusted wheel in the first wheel and the second wheel according to the speed difference; determining a target control speed of the to-be-adjusted wheel according to the mileage difference; and controlling the movement of the to-be-adjusted wheel according to the target control speed. By adopting the method, tire eccentric wear of the carrying system can be avoided.

This invention relates to the field of medical upper limb assistive exoskeletons, and discloses a single-arm active assistive exoskeleton system for cardiopulmonary resuscitation (CPR), comprising: a wearable exoskeleton structure including a back exoskeleton and an upper limb exoskeleton; the back exoskeleton is connected to the upper limb exoskeleton, the upper limb exoskeleton including a shoulder exoskeleton structure, an arm exoskeleton structure, a wrist exoskeleton structure, and a palm exoskeleton structure connected in sequence; a motor drive mechanism including joint motors disposed at the shoulder and elbow for providing active assistance for the upper limb compression action; a sensing unit disposed at the joints of the back exoskeleton, the upper limb exoskeleton, and the palm exoskeleton structure for acquiring real-time motion state information of the rescuer's upper limb and compression state information of the palm; and a control module connected to the motor drive mechanism and the sensing unit for adjusting the motor output in real-time according to the motion state information and compression state information to assist the rescuer in maintaining standard CPR compression operations.

The application discloses a kind of mechanical arm-end effector collaborative anti-interference control method and system, it is related to robot technology field, it solves the problem that robot tracking ability is weak in prior art, ignore the mechanical arm end because of the overall precision of system is low due to the deformation caused by yielding, with the beneficial effect of improving overall trajectory tracking performance, specific scheme is as follows: a kind of mechanical arm-end effector collaborative anti-interference control method, including for mechanical arm, the joint angle of current time mechanical arm is obtained to obtain the translation jacobian matrix of mechanical arm and the position of mechanical arm end flange, for electro-hydraulic auxiliary actuator, real-time acquisition its hydraulic and electrical servo state data;Disturbance observer and controller containing electro-hydraulic auxiliary actuator model are constructed, disturbance observer obtains the equivalent external disturbance force characteristic vector currently acting on the end of mechanical arm, controller generates the voltage control instruction finally injected into electro-hydraulic auxiliary actuator;Disturbance observer solves out physical yielding deformation.

The application discloses a multi-station self-adaptive material taking manipulator of an injection molding machine, comprising a six-axis driving system and a material taking system. The material taking system comprises a flexible strip and a plurality of suction cups. The flexible strip is composed of a flexible outer wall and a magneto-rheological fluid, and can freely bend when not powered. After being powered, the magneto-rheological fluid solidifies to lock the shape. Each suction cup is integrated with a spherical hinge structure, a magneto-rheological damper, a linear servo motor and a pressure sensor to form an active compliant unit. The flexible strip realizes quick switching between flexible fitting and rigid support through the magneto-rheological fluid. The active compliant unit independently regulates and controls the posture of the suction cup to accurately adapt to the local characteristics of the curved surface. In combination with target function optimization and real-time pressure feedback, the application ensures uniform distribution of the grabbing force, avoids damage to the workpiece, and improves the grabbing stability of the complex curved surface product and the multi-station operation efficiency.

The utility model relates to an anti-deformation waterproof door frame and an energy storage container. Wherein the door frame comprises a door frame body and a sealing contact plate; a door opening is formed in the sealing contact plate, and the door opening can be sealed by covering the sealing contact plate with the door body; the sealing contact plate is fixedly limited in the door frame body, and a process seam is reserved between the peripheral side of the sealing contact plate and the door frame body, so that the sealing contact plate can generate relative displacement within the range of the process seam to compensate the deformation of the door frame body; a water retaining structure is arranged at the position, corresponding to each process seam, of the door frame body, and the water retaining structures are used for blocking water flowing to the process seams and / or guiding the water to the outer side of the door frame body. According to the scheme, the door frame body serves as a component for bearing external force, the sealing contact plate serves as a component in sealing contact with the door body, and the door frame body and the sealing contact plate are separated through the process seam, so that deformation of the door frame body cannot be transmitted to the sealing contact plate, the deformation resistance of the sealing face of the door frame is improved, and the deformation resistance sealing effect of the door frame is ensured.

The invention relates to the field of rubber belt conveying, and discloses a layering trolley for automatic deviation correction of a belt storage bin. The device comprises a frame, a floating frame slidably mounted on a sliding shaft on the inner wall of the frame, a supporting assembly and a stabilizing assembly. The floating frame lifts the belt body through the supporting rollers and generates translational displacement along with deviation of the belt body. The supporting assembly extrudes the resistance sleeve through the eccentric cam-shaped extrusion sleeve when the damping rod swings, so that the damping force is linearly increased along with the increase of the offset, and deviation energy of the belt body is absorbed. The stabilizing assembly moves relative to a piston rod fixed relative to the frame through a piston sleeve fixed to the bottom of the floating frame, and hydraulic oil in a main piston cavity is extruded. The sliding block drives the plugging head to mechanically plug the offset side oil way, hydraulic oil is guided to flow to the opposite side in a one-way mode through the connecting cavity, the auxiliary wheels on the opposite side are driven to extend outwards and press the side wall of the rail, and the reverse torque counteracts the overturning torque generated by gravity center offset. Automatic deviation correction and toppling resistance are achieved through mechanical linkage and hydraulic feedback.