42results about How to "Accurate speed" patented technology

The invention relates to the technical field of unmanned aerial vehicles, in particular to a mooring unmanned aerial vehicle safety management system which comprises a multi-source data acquisition module, a data fusion and analysis module, an intelligent risk assessment module, a control instruction generation module and an execution mechanism module. The multi-source data acquisition module acquires flight and mooring cable data of the unmanned aerial vehicle by using various sensors, and transmits the flight and mooring cable data to the data fusion and analysis module through a time division multiple access protocol with low packet loss rate and low delay; the intelligent risk assessment module judges a risk level by combining a risk assessment model based on a support vector machine and a Bayesian network algorithm according to the information, and generates prompt information if the risk level exceeds a preset range; the control instruction generation module generates instructions according to a risk prompt and a preset strategy, ranks the instructions and sends the instructions to the execution mechanism module; a flight control system in the execution mechanism module cooperates with a mooring cable electric take-up and pay-off device and the like, real-time adjustment and control over the flight attitude of the unmanned aerial vehicle and the cable state are achieved, and it is ensured that tasks are safely and stably executed in the complex environment.

The present application relates to a parameter optimization method for a reconfigurable intelligent surface-assisted MIMO communication system, including: taking the weighted rate and WSR maximization of all users as the optimization target, maximizing the weighted rate and WSR of all users by jointly optimizing the transmit precoding matrix F at the base station and the reflection phase shift matrix θ at the RIS; decoupling the optimization target into two sub-targets, and achieving the optimization target of maximizing the weighted rate and WSR of all users by alternately optimizing the transmit precoding matrix F at the base station and the reflection phase shift matrix θ at the RIS. The present application can be applied to the case of multiple cells and when hardware loss is considered, a weighted rate and WSR maximization model is constructed in this way, so that the weighted rate and the weighted rate of users in the maximized system are obtained very accurately.

The invention relates to the technical field of motor position control, in particular to a direct-current servo motor position control method and system based on operation analysis, and the method comprises the steps: obtaining a target direct-current servo motor, obtaining a target model according to the target direct-current servo motor, obtaining a moving position parameter, and obtaining a plurality of parameter adjustment intervals, obtaining a plurality of parameter combinations based on a plurality of parameter adjustment intervals, obtaining an optimal operation state of a target direct current servo motor, obtaining a moving target site, obtaining a current site of the target direct current servo motor, constructing a moving path based on the current site and the moving target site, obtaining curve characteristics of the moving path, dividing the moving path, and obtaining the target direct current servo motor. The method comprises the steps of obtaining multiple sections of divided paths, simulating the divided paths, confirming energy-optimal parameter combinations, summarizing the energy-optimal parameter combinations, obtaining an energy-optimal parameter combination set, and completing direct current servo motor position control based on operation analysis on the basis of the energy-optimal parameter combination set. According to the invention, efficient energy consumption management and accurate position control can be realized.

The present invention belongs to the technical field of video action quality assessment, and specifically discloses a sit-up action quality automatic assessment method based on posture key points. The method first integrates the global attention mechanism GAM and the multi-scale attention mechanism EMA into the YOLOv8-Pose network, so that the action posture estimation and key point detection capabilities are greatly improved, and the detection capability of human body posture and the positioning capability of skeleton key points are effectively improved, so that the action quality prediction score of the scoring network is more accurate. The scoring network uses the idea based on skeleton key points to extract the six skeleton key points that best represent the sit-up action in the sit-up video image, and finally uses the weighted scoring method to score the action quality according to the different characteristics of the key angles of the action points in each action stage of the sit-up, which is conducive to improving the accuracy of the automatic scoring of the quality of the sit-up action completion.

This utility model relates to the field of lifting equipment technology, specifically disclosing a lifting device with a chain transmission mechanism. The inner walls of the frame are vertically provided with guide rail grooves. Upper and lower rotating shafts are rotatably installed between the top and bottom walls of the frame, with upper and lower sprockets fixedly fitted near their respective ends. The lifting platform includes a lifting frame, guide wheels rotatably installed on the top and bottom of the two side walls of the lifting frame and rolling along the guide rail grooves, adjusting pulleys slidably engaged with the top and bottom ends of the two side walls of the lifting frame in a horizontal direction, and tensioning screws for adjusting the horizontal position of the adjusting pulleys. The outer end of the adjusting pulleys is provided with rollers that roll vertically along the inner wall of the guide rail groove. Chains are connected between the top and bottom ends of the two side walls of the lifting frame, with the top and bottom of the chains passing over the upper and lower sprockets respectively. A power component for driving the upper rotating shaft is provided at the top of the frame. This design effectively solves the problems of unstable movement and inconvenient leveling of the lifting platform in lifting equipment.

The utility model discloses a welding gun rotating type automatic welding device. A base, a balance cross arm, a rear parallel block, a balance fixed arm and a front parallel block in the automatic welding device form a cantilever support capable of rotating at will. The cantilever support enables the rotary pressing head to reach any position of the workbench and guarantees that the rotary pressing head is perpendicular to the workbench all the time. The welding gun is fixed to the rotating shaft through the cross-shaped sliding table, the angle steel and the shaft locking block, the servo motor drives the planetary reducer to control the welding gun to rotate automatically through the rotating shaft, accurate speed and position control over the welding gun can be achieved at the same time, and automatic welding of a circular welding seam can be achieved through the automatic welding device.

The invention belongs to the technical field of printing equipment, and particularly relates to ink-jet printing equipment which is characterized in that the ink-jet printing equipment comprises a stretching mechanism, a plurality of vertical frames are fixedly arranged at the bottom of the stretching mechanism, and the stretching mechanism is used for tensioning and stretching a printing stock for ink-jet printing; and the driving mechanisms are arranged on the two sides of the stretching mechanism, and the driving mechanisms are used for providing power for the action of the stretching mechanism and conveying, pressing and positioning the printing stock. The weights of structures such as side rod blocks are vertically downward, so that the surfaces of the deflection cylinders extrude a printing stock to be tensioned, the tension of a plurality of tension springs acts on a surrounding cylinder to drive the structures such as two groups of middle rods, the deflection cylinders, an inner surrounding disc and an outer surrounding disc to rotate by taking the axial direction of the middle rods as the center, the printing stock is tensioned on the surfaces of the four deflection cylinders, and the printing stock is tensioned on the surfaces of the four deflection cylinders. And the printing stock is tensioned through triple tension generated by multiple structures, so that the advantage of clear printing is achieved.

The invention discloses an integrated motor structure with a bidirectional power recovery function, which belongs to the field of permanent magnet synchronous motors and comprises a casing suite, and a motor casing integrated electric control junction box assembly is mounted on the casing suite. A motor through type output shaft is arranged at the position of a central shaft of the machine shell suite, and a plurality of sets of stator assemblies and rotor assemblies are arranged in the machine shell suite. The stator assembly is fixedly connected with the inner wall of the machine shell suite, a radial gap is formed between the stator assembly and the circumference of the motor through type output shaft, the rotor assemblies are fixedly arranged on the motor through type output shaft, and the wet brakes are arranged between the different rotor assemblies. The motor is compact in structure, small in size, light in weight, capable of providing larger torque output, capable of reducing loss energy, capable of improving efficiency and capable of achieving accurate speed and torque control. The device is fast in dynamic response, does not generate electromagnetic noise and vibration in the operation process, is relatively simple in structure, and is relatively long in service life and relatively high in reliability.

The invention provides a minimally invasive surgical robot capable of precisely puncturing at any angle, and relates to the field of intelligent surgical robotics.A first driving device is used for driving a piston to move up and down for injection and suction, and a Z driving device is used for driving a base plate connected with a needle cylinder to move, puncture and withdraw a needle; the X driving device drives the horizontal middle base plate to move in the X direction, and the Y driving device drives the horizontal small base plate to move in the Y direction. The device has the advantages that precise positioning of the needle cylinder is achieved, injection and suction are ingeniously achieved, and minimally invasive surgery diagnosis and treatment are achieved.

The present invention provides a system for controlling the torque of a retarder through an electric pump and a solenoid valve, and relates to the technical field of vehicle retarding mechanical devices. The system for controlling the torque of a retarder through an electric pump and a solenoid valve comprises a retarding mechanical device, a discharge valve, an electric oil pump and a current limiting device; the retarding mechanical device has a high-pressure chamber and a low-pressure chamber; the discharge valve is connected to the retarding mechanical device; the electric oil pump is connected to the discharge valve; the electric oil pump is connected to the retarding mechanical device; the current limiting device is arranged at the output port of the low-pressure chamber, and the opening of the current limiting device is adjustable, and the opening size of the current limiting device controls the torque size of the retarding mechanical device. The system for controlling the torque of a retarder through an electric pump and a solenoid valve not only alleviates the technical problem of the relatively slow torque regulation reaction speed of the retarding mechanical device existing in the prior art, but also achieves the technical effect of rapid torque regulation reaction and precise control, and enables the positive displacement pump principle to be applied to the retarding mechanical device.

The present invention relates to the technical field of metal powder processing, and specifically to a production control method for cemented carbide additives. The method first collects laser power and powder feeding speed during the cemented carbide additive processing; determines process difference parameters based on the matching difference and characteristic consistency of laser power and powder feeding speed; compares the process difference parameters of each processing layer with other processing layers, and screens out the comparison layer of each processing layer; combines the matching difference and process difference parameters of laser power and powder feeding speed between the processing layer and the corresponding comparison layer, determines the process control influence coefficient of each processing layer, corrects the feedback error of laser power and powder feeding speed collected by the PID controller, and controls the laser power in the cemented carbide additive processing and the powder feeding speed when adding metal powder according to the corrected feedback error. The present invention improves the accuracy of production process control for cemented carbide additives.

The invention provides a speed measurement method and system, and the system comprises a pulse encoder which is used for outputting a quadrature coded pulse; a unit timer for generating a unit timing event based on a unit timing period; the pulse counter is connected to the pulse encoder and the unit timer, and is used for carrying out pulse counting on the basis of the orthogonal encoding pulse and responding to the unit timing event to obtain a pulse counting sequence; the capture timer is connected to the pulse encoder and the unit timer and is used for acquiring a first capture timing sequence based on the orthogonal coded pulse and acquiring a second capture timing sequence in response to the unit timing event; and a speed calculator connected to the pulse counter and the capture timer and used for obtaining an average speed based on the unit timing period, the pulse counting sequence, the first capture timing sequence and the second capture timing sequence. The method is suitable for full-speed-section speed measurement, and the speed measurement precision is improved.

The invention discloses an electric control system and method for a belt elevator of a gantry crane, and belongs to the technical field of control over the belt elevator of the gantry crane. The electric control system of the belt elevator of the gantry crane comprises the belt elevator, an operation input unit, a PLC (Programmable Logic Controller) control unit, a safety monitoring unit, an execution indication unit and a variable frequency driving unit. The invention provides an electric control system and method for a belt elevator of a gantry crane, which are high in integration level, intelligent and reliable, can cooperate with the gantry crane to work, can realize full-automatic, continuous and efficient conveying of materials from the gantry crane to a storage yard, fundamentally replaces vehicle transfer, and improves the working efficiency. The system has complete safety protection and intelligent fault diagnosis functions, and aims to improve the operation efficiency, reduce the operation cost and realize green and environment-friendly wharf operation.

The invention provides a satellite navigation segmented integral Doppler velocity measurement method and system under carrier rotation by adopting a method based on carrier phase differential velocity measurement, and on the basis of a carrier smooth pseudo-range, Doppler measurement values at measurement moments are estimated in advance by adopting a segmented integral Doppler method. Advanced estimation is carried out on the Doppler measurement value of each satellite, the advanced estimation method is unique in logic, and the method eliminates delay brought by an average differential velocity measurement method while ensuring good positioning precision, improves the velocity measurement real-time performance, solves the problem that the accurate receiver position and velocity at the measurement moment cannot be obtained, and improves the measurement accuracy of the receiver. And the requirement of accurate speed measurement under carrier rotation is met.

The invention discloses a vehicle speed detection device and method for a hazardous chemical substance transportation vehicle, and relates to the field of traffic transportation, and the method comprises the following steps: obtaining a driving speed: connecting a speed measurement device to a CAN bus of the hazardous chemical substance transportation vehicle; transmitting the acquired driving speed data to the 4G terminal; data uploading: the 4G terminal uploads the driving speed data to a background monitoring system, and the background monitoring system judges the received driving speed data according to a preset vehicle speed threshold value; data analysis: when the driving speed data exceeds a preset vehicle speed threshold value, a prompt device sends prompt information that you are overspeed to a driver so as to remind the driver to decelerate; meanwhile, the 4G terminal sends an instruction to the sensing layer device. The device is more accurate in vehicle speed detection, is not influenced by pulse signals or GPS signals, is more effective and direct in background supervision, is simple, is convenient to install, and is low in cost.

The utility model relates to the technical field of black fungus bag production, and discloses a fungus bag opening sealing machine which comprises a connecting frame and a bearing frame, the top of the bearing frame is fixedly connected with a fungus bag clamping groove, an opening sealing speed regulating motor is fixedly connected in the connecting frame, the driving end of the opening sealing speed regulating motor is fixedly connected with a first opening sealing shaft rod, and the driving end of the first opening sealing shaft rod is fixedly connected with a second opening sealing shaft rod. The top of the first nest opening shaft rod is fixedly connected with a nest opening shaft rod stroke fixing plate, the inner portion of the nest opening shaft rod stroke fixing plate is fixedly connected with an inserting rod shaft rod, the top of the bearing frame is fixedly connected with an inverted floating material stroke module, and the outer portion of the inverted floating material stroke module is fixedly connected with an inverted floating material stroke sliding table. According to the utility model, flexible clamping and quantitative rotating tightening are realized by the six-claw opening folding claws, the opening folding forming precision of fungus bags is ensured, opening folding-rod insertion-flattening is realized, and the effects of full-flow intelligent upgrading, higher speed, higher accuracy and lower failure rate of fungus bag bagging operation are realized by three-station parallel line production.

The utility model discloses a liquid mixing device, relates to the technical field of medicine processing devices, and solves the problems that the mixing effect is poor, the activity of added components is damaged due to mechanical stirring and the like. Comprising a mixing pipeline, the mixing pipeline conveys at least two kinds of liquid, the mixing pipeline is connected with a mixer, the mixer comprises an outer pipe and a central shaft, the central shaft is arranged in the outer pipe, and the outer pipe is connected with the mixing pipeline to form communication; a plurality of stirring and mixing blocks are fixedly arranged on the central shaft in the axial direction of the central shaft, the stirring and mixing blocks protrude outwards in the radial direction of the central shaft, a preset distance is formed between every two adjacent stirring and mixing blocks, and a preset included angle is formed in the mounting direction of every two adjacent stirring and mixing blocks. By means of the uniform mixer, especially the stirring and mixing blocks which are arranged in a staggered mode, a strong turbulent flow effect can be generated when liquid flows through the uniform mixer, the liquid can be promoted to form complex vortexes and folds, collision and diffusion among liquid molecules are greatly improved, and therefore the mixing efficiency is improved.

The invention relates to the field of motors, in particular to a wide-speed-regulation-range motor applied to a stirring system. The invention discloses a wide-speed-regulation-range motor applied to a stirring system. The wide-speed-regulation-range motor comprises a motor shell with a protection frame, the front end cover is fixedly connected to the front side of the motor shell, and the front end cover is communicated with the internal space of the motor shell; the rear end cover is fixedly connected to the rear part of the motor shell; and the motor control box is arranged on the outer side of the motor shell. The permanent magnet direct-driven motor is used as a power source in the stirring system, a permanent magnet material is used as a rotor excitation source, the speed regulation range is wide, the rotating speed can be adjusted according to the actual working condition, the closed-loop control system is adopted, the rotating speed can be accurately controlled, more accurate rotating speed and torque control is achieved, and the stirring efficiency is improved. The performance requirements of different torque densities, rotating speeds and the like are met, and work is efficiently completed.

This application provides a charging device, a charging cloud platform, and a charging system. The charging device includes a temperature controller and a temperature sensor. The temperature sensor detects the temperature of the charging device, and the temperature controller adjusts the temperature of the charging device. The charging device is used to: transmit temperature control data during the output of DC power, including the temperature from the temperature sensor and the corresponding rotational speed of the temperature controller; receive an empirical temperature control curve, which is a curve showing the relationship between the temperature of the charging device and the rotational speed of the temperature controller. The empirical temperature control curve is fitted based on temperature control data from at least two charging devices, including the charging device itself and other charging devices besides the charging device; and control the rotational speed of the temperature controller based on the empirical temperature control curve and the temperature from the temperature sensor. The solution provided in this application can reduce the R&D investment in temperature control characteristics, thereby reducing economic and labor costs.

The utility model provides a kind of multi-unit moving coil motor, including at least two parallelly arranged substrates and the rotating shaft passing through the end surface of substrate, first coil winding and second coil winding are evenly arranged in the two end surfaces of substrate, first permanent magnet group and second permanent magnet group are arranged in the two end surfaces of substrate, first permanent magnet group and second permanent magnet group are all suspended outside first coil winding and second coil winding, fixed plate is arranged in the side of first permanent magnet group and second permanent magnet group away from substrate, first permanent magnet group and second permanent magnet group are all fixed on the fixed plate.The permanent magnet group of the application can form coverage to the deflection range of first coil winding and second coil winding, secondly, the magnet is arranged on both sides of coil in the application, compared with the magnet on one side, it has better magnetic field intensity.Finally, the application is arranged by parallelly arranging multiple substrates, compared with single substrate, it can provide stronger torsion to rotating shaft.

The present invention relates to the field of seismic exploration, and discloses a method for improving seismic velocity and imaging update based on well-seismic matching deviation correction, the method comprising: making synthetic seismic according to acquired logging data; calculating well-seismic matching deviation according to synthetic seismic and wellside seismic traces acquired at logging location; updating seismic velocity at logging location according to matching deviation; performing differential extrapolation of seismic velocity according to calculated seismic attributes to generate seismic velocity body; performing seismic offset imaging using seismic velocity body to obtain updated seismic imaging; calculating correlation coefficient between seismic traces of updated seismic imaging and synthetic seismic; judging whether coefficient is greater than a set threshold value, if coefficient is greater than the set threshold value, completing updating of velocity and imaging; if coefficient is not greater than the set threshold value, performing the above steps again until coefficient is greater than the set threshold value. The present invention has high computational efficiency, and can efficiently complete updating of seismic velocity and imaging even when seismic work area is large.

The present invention discloses a device for measuring the relative motion speed of the contact point position of a planetary roller screw, comprising: a motor, a motor seat, a rigid coupling, a speed sensor, a speed sensor seat, a bearing and a support, a movable slide, a screw to be measured, a guide rail and a grating ruler; wherein the motor is arranged on the motor seat; the speed sensor is arranged on the speed sensor seat; the output shaft of the motor is connected to one end of the rigid coupling, and the other end of the rigid coupling is connected to the speed sensor; the speed sensor is connected to one end of the screw to be measured; the other end of the screw to be measured passes through the bearing and the support and the movable slide in sequence; the movable slide is connected to the guide rail through a slider; the grating ruler is arranged on the guide rail. The present invention can directly measure the relative speed, and improves the accuracy of measuring the relative speed.

The utility model provides an improved moving coil type deflection motor, including base plate and pivot, first coil winding and second coil winding are all provided with in the both ends of base plate, first coil winding and second coil winding are symmetrical distribution to pivot, first permanent magnet group and second permanent magnet group are provided with respectively in the both ends of base plate, the polarity of the permanent magnet group all wraps two permanent magnet adjacent the permanent magnet, when first coil winding and second coil winding repeatedly deflect with pivot as the axis, first permanent magnet group and second permanent magnet group can form the coverage to the deflection range of first coil winding and second coil winding respectively. The application is through setting up magnet in coil winding both sides, makes the coil always to be under the even high intensity magnetic field coverage in whole movement range, has no magnetic field gradient interference, dynamic response is faster and more stable, to realize more accurate displacement and speed control, be more suitable for being applied to the precision instrument that needs high accuracy positioning.

The embodiment of the invention provides a vehicle control method and system, a vehicle and a storage medium, and the method comprises the steps: carrying out the non-inductive control of a motor, and determining the rotating speed of the motor; determining a reference rotational speed based on the wheel speed; and under the condition that the difference value between the motor rotating speed and the reference rotating speed is within a preset interval, motor output control is conducted on the vehicle based on the motor rotating speed. According to the embodiment of the invention, the initial rotating speed determined by the non-inductive control is coupled with the reference rotating speed determined based on the wheel speed, and the output of the non-inductive control is corrected, so that the control accuracy is ensured, and the safety of the vehicle is ensured.

The present invention discloses a method for detecting and analyzing new bone tissue of non-section specimens, and belongs to the field of bone tissue engineering technology. The method uses a high-resolution in vivo two-photon laser scanning microscopy system to perform fluorescence scanning detection on type I collagen and fluorescently labeled mineralized structures in the specimen's new bone tissue to obtain a bone matrix image; a three-dimensional scanning method including three mutually perpendicular axes, namely, an x-axis, a y-axis, and a z-axis, is adopted, and the high-resolution in vivo two-photon laser scanning microscopy system is used to perform a full-layer scan of the new bone tissue sample, and the new bone tissue is quantitatively analyzed through the fluorescent image obtained by scanning. The method of the present invention solves the problems of waste of bone tissue specimens, incomplete display of new bone tissue, uncertain labeling positioning, and inaccurate quantification caused by the use of hard tissue sections for new bone detection. The method is simple to operate, and the quantitative data is reliable, and it can fully reflect the situation of new bone.

The application discloses a handheld underwater detection device with adjustable direction propulsion and belongs to the technical field of underwater operation equipment. The existing handheld underwater detection device completely relies on manpower movement, and problems such as no power assistance, power and detection being unable to be coordinated exist. The application comprises a main body structure, a quick-release battery assembly, a sensing unit, an interactive display module and an underwater propulsion module. The main body structure comprises a main shell and a handheld ring connected with the main shell. The quick-release battery assembly is installed on the main body structure, provides power for the device and realizes quick release of the battery. The sensing unit comprises a detection imaging assembly and a multi-source fusion positioning navigation module. The interactive display module comprises a display screen and control buttons arranged on the top surface of the main body structure. The underwater propulsion module comprises an underwater steering engine fixed below the main body structure and an underwater propeller connected with the output end of the underwater steering engine, and the underwater steering engine is used for driving the underwater propeller to realize adjustable pitch angle. The application realizes adjustable direction autonomous propulsion of the handheld underwater detection device, integrates detection, navigation and power assistance into one, and is convenient for operation.

The invention discloses a data processing method for a remote controller control rod of an underwater robot, which comprises the following steps: accurately positioning the position of the underwater robot, performing path navigation according to the environment, sending a remote control signal to the underwater robot, and controlling the advancing path of the underwater robot; according to a potentiometer voltage stabilization module, monitoring voltage output of the potentiometer in real time, comparing voltage real-time data according to a potentiometer threshold parameter, and designing a counter to adjust voltage according to a state; underwater data needing to be collected are collected through the data collection module, data collected by multiple sensors of the underwater robot are processed, the underwater robot is put in a preset putting place of the underwater robot by arranging the putting device, the underwater robot is controlled to return according to a specified path, and the underwater robot is recycled through the recycling device. Through the state transition method of the potentiometer, the interference of the abnormal jump of the voltage of the potentiometer on the control instruction is reduced, and the operation precision and safety of the remote controller are ensured.

The application discloses a kind of adjustable orientation multi-channel plasma discharge device, it is related to multi-channel plasma discharge equipment technical field, including substrate frame, the substrate frame is equipped with discharge channel, the discharge channel is equipped with discharge device, the discharge channel one side is equipped with gas supply device, the gas supply device transports the gas to be ionized to the discharge device, the discharge device is used to ionize the gas provided by the gas supply device into plasma, the discharge channel is rotationally connected with plasma guide plate at the end away from the gas supply device, the plasma guide plate is used to guide the plasma that flows out from the discharge channel.The application can adjust the delivery angle of the plasma that flows out from discharge channel, so as to meet the diversified angle requirement of plasma.