176results about How to "Achieve precise control" patented technology

The invention provides a method and device for predicting social network links based on cooperative fusion principles. The method comprises the steps: acquiring a set A of nearest neighbor sets T(a), T(b) of a node pair (a, b) in a social network; acquiring a likelihood function P1 (Ai) and a trusting function Be1 (Ai) of a node Ai in the set A; cooperatively fusing the likelihood function P1 (Ai) and the trusting function Be1 (Ai) and acquiring connectivity p (a, b) and reliability d (a, b) of the node pair (a, b); acquiring missing edge judging rules of a hidden link in the social network and excavating a hidden relation of the social network. The above method is applicable to the computing requirement of the large-scale social network; while the order of magnitudes of the computing complexity is not changed, accuracy of predicting results can be improved greatly; the predicting link scale can be adjusted according to error tolerance, thus precise control for predicting large-scale social network links is realized.

The invention relates to an LED (Light Emitting Diode) streetlight with a communication function and an intelligent control system thereof. The intelligent control system comprises a total network control center, an area network control center and an LED streetlight, wherein the total network control center is connected with the area network control center through a third network, receives a signal fed back by the area network control center and can transmit a control signal to the area network control center. The area network control center is in charge of collecting the state of the LED streetlight and work environment information in an area and transmitting communication or control information to the LED streetlight through a first network. The LED streetlight comprises a power supply module, an LED light, a signal transceiving module and a power supply control module. Because the intelligent control system of the LED streetlight comprises the LED streetlight with the signal transceiving module and the area network control center with the intelligent control function, the intelligent control to the LED streetlight can be realized, and the dependence degree of the entire system on people is reduced.

The invention discloses a method and a device for controlling an engine of a load-based crawler crane. According to the method, a working curve of the engine in a working mode which is selected by a working mode selection unit and a maximum rotating speed corresponding to the working curve are determined, and a demanded power of a pump is limited to be smaller than an output power of the engine at the current rotating speed while the current rotating speed of the engine in the selected working mode can be limited to be smaller than the maximum rotating speed of the engine in the selected working mode. According to the method and the device, different engine working modes are selected, different pre-calibrated engine characteristic curves are selected to be matched with a hydraulic system, and the maximum rotating speeds in different working modes are limited, so that the contradiction between the speed of a mechanism and the fuel economy of the engine when the crane is light-load and high-speed is mainly solved, and the engine can also be accurately controlled.

The invention discloses a water purifier sales and maintenance management system based on the Internet of things, and belongs to the technical field of the Internet of water purifiers. The system comprises water purifiers based on the Internet of things, water purifier clients, a water purifier distributor management terminal and a water purifier management platform. The water purifier managementplatform comprises multiple subsystems such as an equipment management subsystem, a customer management subsystem, a distributor management subsystem, so that state monitoring for the water purifier equipment can be realized, diversified services are provided for users, establishment, query and maintenance management functions are provided for all levels of distributors, integrated management foroperation, sales and after-sales services of the water purifiers is met, the operation efficiency is improved, and the user experience and the timeliness and safety of management for the water purifiers are enhanced.

The invention relates to a quad-rotor unmanned aerial vehicle reinforcement learning nonlinear attitude control method, and aims to solve a problem of quad-rotor unmanned aerial vehicle attitude control of a quad-rotor unmanned aerial vehicle dynamical model with an unmodeled part; and a reinforcement learning controller based on an execution-evaluation neural network is designed for estimating the unmodeled part of the model. And meanwhile, a nonlinear robust controller based on multivariable super-twisting is designed, so that stable attitude control of the quadrotor unmanned aerial vehicleis realized.

A preparing method of a metal-carbide-containing multi-layer multi-component composite material is disclosed. The method includes: designing a component formula of each layer of the composite material by adopting refractory metal carbides and carbon powder as raw materials; uniformly mixing the corresponding refractory metal carbide and the carbon powder according to the formula of each layer; pressing different mixtures containing the metal carbides and the carbon into a multi-layer multi-component precursor according to a designed layering sequence of the composite material; and performing direct deoxygenation, in-situ carbonization and synchronous sintering by adopting an electrochemical deoxygenation technology with controlled oxygen flow to obtain the composite material. According to the preparing method, the electrochemical method is adopted for the first time to directly prepare the metal-carbide-containing multi-layer multi-component composite material, thus avoiding dependence on high-temperature high-purity metal initial materials. The preparing method has characteristics of controllable processes, high efficiency, simple operation, short process, easily expended production, low requirements for the raw materials, simple preparation process, low cost and low preparing process temperature, thus facilitating industrial production.

The invention belongs to the technical field of high-voltage insulator experiments and particularly relates to a temperature and humidity combined control system for an artificial pollution test room. The system comprises a humidifier, a heater and a ventilation fan and further comprises a temperature and humidity sensor, an industrial personal computer and a data acquisition card. The humidifier, the heater, the ventilation fan and the temperature and humidity sensor are connected with the data acquisition card respectively, and the data acquisition card is connected with the industrial personal computer. Temperature and humidity control target values of a spray room are set through program software of the industrial personal computer, the data acquisition card acquires temperature and humidity value information in an existing state in the spray room through the temperature and humidity sensor, the temperature and humidity value information is input in the industrial personal computer to be compared with the set temperature and humidity control target values and judged, a corresponding working condition mode is determined, the heater, the humidifier and the ventilation fan are controlled respectively, and the temperature and humidity combined accurate control is achieved. An accurate test environment is provided for study on characteristics of leakage currents of the surfaces of insulators, such as leakage current maximum values, pulse peak values, the pulse discharge capacity and leakage current high-frequency components.

The invention relates to a pipe leaching method and a pipe leaching device for solid powder. The solution to be leached flows through the pipe leaching device arranged in a tank container and the leaching process is completed by adopting the pipe leaching method. The pipe leaching method comprises that: the solution to be leached is conveyed into a pipeline of the pipe leaching device by using an ultrasonic generating device to complete an irreversible leaching process of the solid powders in the process that the solution to be leached irreversibly flows through the pipeline with an ultrasonic energy field. The irreversible leaching process comprises that when the solid powder with given size goes through the same leaching time, most of the grains have the same flowing through path; the residual grains tend to be equal in aspects of grain mass, grain diameters and grain target components, and the solid powders added in a leaching reaction region later are difficult to be mixed with the solid powders added in the leaching reaction region firstly. The solid powders are mineral powders and (or) animal and plants powders, wherein the mineral powders are oxide mineral powders and (or) sulfide mineral powders; and the animal and plants powders at least comprise Chinese medicinal powders.

The invention discloses an extractor hood and a control method for an opening and closing panel assembly. The extractor hood comprises the opening and closing panel assembly which comprises a drivingmotor, an opening and closing panel and a control device. The opening and closing panel is connected with the driving motor; and the control device is electrically connected with the driving motor. The control device is used for controlling the rotating direction and the work time of the driving motor so as to control the opening and closing panel to rotate and make the opening and closing panel kept at a minimum angle, a maximum angle or at least one angle between the minimum angle and the maximum angle; the work time of the driving motor is relevant to the angle of the opening and closing panel; and the rotating direction of the driving motor is relevant to the rotating direction of the opening and closing panel. According to the extractor hood, the control device is sued for controllingthe rotating direction and the work time of the driving motor so as to control the opening and closing angle of the opening and closing panel, it can be avoided that a limiting switch arranged in theopening and closing panel assembly is used, and therefore accurate control over the opening and closing angle of the opening and closing panel and multiple opening and closing angles of the opening and closing panel can be achieved. Meanwhile, the hardware cost of the extractor hood can also be reduced.

The invention relates to a steering gear control system and method based on fuzzy neural PID control and an absolute encoder. The system comprises a fuzzy neural PID control unit, the absolute encoder, a serial communication unit and a host computer. The host computer and the fuzzy neural PID control unit are connected through the serial communication module. The output end of the absolute encoderis connected with the input end of the fuzzy neural PID control unit. The absolute encoder is used to acquire the steering angle information of a steering gear. The serial communication module is used to receive the control information of the host computer, transmit the control information to the fuzzy neural PID control unit, and send the position information of the absolute encoder to the hostcomputer. The fuzzy neural PID control unit receives the control information of the host computer, drives the absolute encoder to rotate, calculates steering gear control parameters to generate a PWMsignal, and outputs the PWM signal to the steering gear. The steering gear control system and method based on fuzzy neural PID control and the absolute encoder have high control precision, and solve the problem that the existing steering gear control technology has poor adaptability and robustness and is not flexible to the joint motion of a robot.

The invention provides a vacuum assisted resin infusion fabric compacting characteristic and permeability performance integrated testing device. The invention for the first time provides a fabric compacting characteristic and permeability performance integrated testing idea in vacuum assisted resin infusion, the device is capable of performing integrated experiment test of fabric compacting characteristic and permeability performance, and is capable of accurately researching the influence factors such as compacting strength, compacting time and cycle loading, fabric layers and fabric braiding methods on the compacting characteristic under a dry state and a moisture state of the fabric, and is capable of testing permeability of the fabric in plane and thickness direction. The device can realize the test for the fabric performance under same condition of the vacuum assisted resin infusion, employs a self-designed negative pressure controller, a pressure tester and an eddy current displacement sensor can realize automatic control of various influence factors, and can obviously increase the experiment efficiency of the fabric compacting characteristic and permeability performance test and can optimize the test cost.

The invention provides an integrated synchronous phosphorus removal denitrification deep bed filter and a treatment system and a treatment method of the deep bed filter. The integrated synchronous phosphorus removal denitrification deep bed filter comprises a filter main body, wherein the lower part of the filter main body is provided with a porous supporting layer, a flap filter material layer is arranged above the porous supporting layer, a suspended filler layer is arranged above the flap filter material layer, an overhead layer is arranged above the suspended filler layer, and the filter main body is provided with a water inlet, an air inlet pipeline and a chemical phosphorus removal dosing inlet in the porous supporting layer; the flap filter material layer comprises multiple downward-inclined flaps for hanging a fibrous filler, and the flaps are arranged in a crossed mode in sequence from two sides of the filter main body; the filter main body is provided with a carbon source supplementation inlet below the porous supporting layer; and the bottom of the filter main body is provided with a backwash water outlet. According to the technical scheme of the invention, chemical phosphorus removal and denitrification are integrated, the synchronous denitrification and phosphorus removal efficiency is high, the floor area is small, and water resources are saved.

The invention relates to a line-driven continuous flexible mechanical arm and a flexible robot comprising the line-driven continuous flexible mechanical arm. The line-driven continuous flexible mechanical arm comprises a space flexible arm and multiple driving control modules arranged on the top of the space flexible arm. The space flexible arm comprises multiple flexible arm foldable frameworks which are sequentially connected in series and coaxially arranged. Each flexible arm foldable framework comprises an upper platform, multiple bendable folding plates, flexible springs and a lower platform, wherein the folding plates and the flexible springs are located between the upper platforms and the lower platforms, the multiple folding plates of each flexible arm foldable framework are sequentially arranged at intervals and form cavities, and the flexible springs are located in the cavities. Cables which can be wound and unwound are arranged between the space flexible arm and the driving control modules, the top ends of the cables are wound and fixed to the driving control modules, and the bottom ends of the cables are fixed to the lower platform of the flexible arm foldable framework located at the bottommost end. Compared with the prior art, the line-driven continuous flexible mechanical arm has the advantages that the length and different bending forms of the flexible mechanical arm and the position of the flexible mechanical arm in the space are achieved, and the accurate control over the tail end of the flexible mechanical arm is achieved.

The invention discloses a structured control method for an automobile active suspension system and a control device. The structured control method for the automobile active suspension system comprisesthe following steps of establishing 1 / 4 automobile active suspension system model; establishing a control target of an active suspension structured controller; designing a structured controller of the 1 / 4 automobile active suspension system; and adjusting parameters of the structured controller to realize automobile stability and comfort control. According to the structured control method for theautomobile active suspension system, the operation stability, the driving stability and the taking comfort of an automobile can be effectively improved and the design of the controller can be simplified to be easy to implement. The invention further provides a structured control device for the the automobile active suspension system.

The invention discloses a reverse weed positioning method and a reverse weed positioning device, which are used for positioning field weeds for a crop. The reverse weed positioning method comprises the steps of: crop positioning, a field crop is analyzed and recognized according to feature values of an extended HU invariant moment of the crop and shape features of the crop through analyzing image information of the crop, and a crop region is marked, wherein the shape features comprises vertical and horizontal axis ratio, rectangular degree, area concave-convex ratio, perimeter concave-convex ratio, spherical property, circularity, eccentricity ratio and shape parameter features; weeds positioning, wherein all green plants outside the crop region are regarded as weeds, and the region outside the crop region is marked as a weed region; and result output, wherein the crop region and / or weed region are / is output and displayed. The reverse weed positioning device comprises an image acquisition module, an image processing module, a data processing module, a positioning and marking module, and an output and display module. The reverse weed positioning method and the reverse weed positioning device can automatically acquire field weed information quickly and accurately, and achieve precise positioning of the weeds.

Disclosed are a processing method and device, control device and operating method, and control method and system, the processing method comprising: acquiring a picture containing a household appliance; calculating, according to the picture of the household appliance, a movement parameter required for a control device to move to a preset target position relative to the household appliance to be controlled; and when a user controls the household appliance to be controlled, transmitting the movement parameter to the control device to allow the control device to move to the preset target position to control the household appliance to be controlled. Also disclosed are a processing method and device, control device and operating method, and control method and system.

The invention discloses a robot with the precise control function. The robot comprises a control part, a driving part, a moving part and an encoder; the control part comprises a resolving unit, a wavetable and a calculation adjusting unit; the resolving unit is used for resolving according to the motion parameters and the resolution of the encoder to obtain a set of wave table data and a theoretical micro-step value between two lines of the encoder, and the wave table data represents the theoretical time value between every two lines of the encoder; the wave table is used for storing the wavetable data; the calculation adjusting unit is used for calculating according to the wave table data between the current two lines of the encoder which is taken out from the wave table, the theoretical micro-step numerical value between the two lines of the encoder and the actual motion time between the current two lines which is detected by the encoder to obtain an actual period value corresponding to each micro step between the last two lines of the encoder, and the actual period value is used as an updated period value of the driving part. The robot does not need to be stopped, and then perform calculation and adjustment, so that the purpose of accurate control can be achieved, and the error is extremely small.

The invention discloses a filling mining critical-fullness-rate design method. The method includes: A, obtaining a theoretical design value of a solid-filling coal-mining fullness rate according to afilling mining objective and a control object; B, establishing an overlying stratum structure model and an elastic-foundation beam model; C, calculating a load of a n-th stratum on a first stratum according to a composite-beam principle; D, adopting a stiffness discriminating condition of stratum separation occurrence and a force differential principle of a beam to construct a deflection differential equation of the n-th stratum; E, simplifying fractured n-1 strata to a total elastic-foundation coefficient k, and establishing a relationship of the k and a filling-body elastic-foundation coefficient k<g> and a relationship of the k<g> and the fullness rate phi; F, solving a deflection curve equation expression by boundary conditions of a clamped-clamped beam; G, obtaining a relationship ofthe elastic-foundation coefficient k and stratum allowable-stress [sigma<t>] according to a first strength theory; and H, obtaining a critical fullness rate of fracturing occurrence of the n-th stratum by the elastic-foundation coefficient k.

The invention provides a pressure pulse testing machine, and aims to solve the problem of inaccurate control of measuring parameters and waveforms due to pressure difference existing among each pressurizing point in the conventional pressure pulse technology although air pressure serving as a constantly-existing natural product can be used for effectively detecting a pressure sensor. Technical key points of the invention are that an air storing cabinet comprises a primary pressure cavity and a secondary pressure cavity; the primary pressure cavity is connected with an air pump; the upper part of the secondary pressure cavity is provided with an elastic connector, an air inlet servo valve and a standard pressure cavity in sequence; the side wall of the standard pressure cavity is provided with an exhaust electromagnetic valve group and an adjusting electromagnetic valve; pressurizing holes are uniformly distributed in the upper surface of the standard pressure cavity; a pressure sensor of a standard sensor with a waveform feedback measuring function is arranged in at least one of the pressurizing holes. The pressure pulse testing machine has the positive effects that fatigue test can be performed on a tested object under the condition that the tested object is not damaged. The pressure pulse testing machine further has the characteristics of high control degree, low cost, stability, reliability, high practicability and the like.

The invention discloses an irrigation system for plants and a method thereof. The irrigation system comprises: a humidity sensor, a host, a first solenoid valve, a water pump, a timer, and a pipeline.The humidity sensor is fixed in the soil of an area where plants are located; a plant irrigation data table is stored in the host; the plant irrigation data table includes humidity data and pH valuedata of each species of plants for each month; a data output end of the humidity sensor and the timer are both connected to an input end of the host; the host is used for determining current irrigation volume of plants according to the detection data of the humidity sensor and humidity data of the plant irrigation data table; an output end of the host is connected with an input end of the solenoidvalve, an output end of which is connected with a control end of the water pump, a water outlet of which is connected with the pipeline; the pipeline is laid in the area where plants are located; andthe hose is used for adjusting on-off time of the solenoid valve according to the irrigation volume so as to further adjust the opening time of the water pump. By the system or the method of the invention, automatic irrigation can be achieved to improve irrigation efficiency.

The invention relates to an energy-saving fuel system for a thermal power plant. The energy-saving fuel system comprises fuel tanks, fuel supply pumps, a fuel gun and a fuel supply mains and a fuel return mains of the fuel gun. A fuel channel pressurizing device is connected between outlets of the fuel tanks and the fuel supply mains, a first adjusting valve is arranged on a pipeline between fuel outlet ends of the fuel supply pumps and a fuel outlet end of the oil channel pressurizing device, the fuel return mains is provided with a second adjusting valve, and the fuel channel pressurizing device comprises a fuel energy storage tank and a fuel pressure pump. The fuel system for the thermal power plant keeps fuel pressure stable on the premise of no spinning reserve of the fuel supply pump, energy resources are saved, and the problem that fuel temperature rises to exceed flammability point is avoided.

This invention discloses a precision measurement control valve. It is mainly consisted by a main body seat and main body cover, blade wheel, gear, fixed salver underdriving gear set, cam, control cylinder body, spring, handle and other components. Through underdriving gear set, flow velocity and speed reducing ratio of underdriving gear set is matched to realize precision measurement. When underdriving gear set rotates to setting position, valve closed signal is transferred by cam driven by underdriving gear set, then interval channel is closed through valve part to realize precision measurement control.

The invention relates to a prestress thick plate hollow floor construction method. The method comprises the steps: according to hollow floor design parameters, deepening the geometric dimension and arrangement parameters of a built-in hollow square box; determining arrangement parameters of an anti-floating tie bar; mounting a formwork; locating a hidden beam, a column cap, a multi-ribbed beam, ahigh-injection alloy square box and a reserved embedded facility and performing scribing; installing the hidden beam, column cap ribs, a plate bottom reinforcing steel bar, prestressed ribs and the reserved embedded facility; connecting the plate bottom reinforcing steel bar with the bottom template; laying a hollow square box bottom positioning device; laying a hollow square box; laying an anti-floating steel bar layer, and placing an upper positioning device; connecting the upper positioning device with the plate bottom reinforcing steel bar; placing a plate top reinforcing steel bar cushionblock, laying plate top reinforcing steel bars on the plate top reinforcing steel bar cushion block and performing binding, and tying the plate top reinforcing steel bars and the plate bottom reinforcing steel bars through tie bars; pouring concrete, and performing vibrating and maintaining; performing prestress tensioning, grouting and anchor sealing; and dismantling the formwork. The construction quality of the prestress hollow floor can be improved, and the field construction difficulty is reduced.

The invention relates to the technical field of spin-coating film preparation, and discloses a spin-coating film preparation device for an optical element by employing a gel method. A first motor is connected with the lower end of a box body in a penetrating manner, and a second motor is connected with the lower end of the box body at the left side of the first motor in a penetrating manner; an output shaft of the second motor extends into the box body and is fixedly connected with a spin-coating table; a feeding hole is formed in each of side walls of the left end and the right end of the boxbody; a first spring is fixedly connected to the outer side of the left side wall of the box body; a limiting block is fixedly connected to the left side of the first spring; and a limiting rod is fixedly connected to the right side of the limiting block. Through cooperative arrangement of motors, a rotating column, sleeves, conducting plates and electromagnets, the effect of keeping constant liquid dropping amount is achieved, and the problem that a large number of spots are generated on the surface of the optical element is solved; and meanwhile, through cooperative arrangement of a threaded rod, a threaded sleeve, the springs and conductive sliding blocks, the problem that a layer of mist film is generated on the surface of the optical element at present is solved.

The invention belongs to the field of magnetic suspension modeling floating bearing modeling, and provides a magnetic suspension bearing modeling method and system under a multi-parameter uncertainty condition. The magnetic suspension bearing modeling method under a multi-parameter uncertainty condition comprises the steps of obtaining the rotor amplitude and air gap parameters of a magnetic suspension bearing, and calculating the amplitude air gap ratio of the magnetic suspension bearing; comparing the calculated amplitude air gap ratio with a set amplitude air gap threshold value, and if the former is greater than or equal to the latter, constructing a magnetic suspension bearing model under the condition of a high-order truncation error boundary and other uncertainty parameter boundaries; if the former is smaller than the latter, constructing a magnetic suspension bearing model under the condition of a magnetic bearing force uncertainty error boundary and other uncertainty parameter boundaries; and simulating the constructed corresponding magnetic suspension bearing model by adopting a matching control strategy so as to accurately control the magnetic suspension bearing and evaluate the dynamic response of the magnetic suspension bearing.

The invention discloses a dual-core four-wheel drive UWB positioning mowing robot capable of being wirelessly controlled and a control method of the dual-core four-wheel drive UWB positioning mowing robot. The mowing robot uses the UWB wireless positioning system; pre-embedded boundary line can be avoided, manpower saving is achieved, a self-precise position can be avoided, a DSP + FPGA dual-coreprocessor cooperative work design is adopted. The operation speed and the control precision are greatly improved; a WIFI wireless transmission module is adopted, the mowing robot can be accessed to the Internet; even if a user is traveling outside, the work of the mowing robot at home can be monitored and controlled anytime and anywhere; the mowing robot is more practical and convenient, based ona servo system of the latest embedded technology, an intelligent mowing task program is adopted, a mowing area grid map is established, global coverage path planning is carried out, a mowed area and an unmowed area are marked, the mowing efficiency can be greatly improved, and the phenomenon of missing mowing of grassland is reduced.

The invention provides a positioning device for implementing needle biopsy of breast tumor. The invention aims to solve the problems that an existing device cannot assist in fixing a soft breast during positioning, and tumor tissue is prone to displacement during puncture. The positioning device comprises a circular supporting disc, wherein the outer side of the supporting disc is rotationally connected with a plurality of double-layer extrusion devices, the upper end of the supporting disc is provided with a supporting rod, the supporting rod is slidably connected with a moving seat, a structural hole is formed in the axis of the bottom of the supporting disc, an avoiding groove is formed in the side wall of the supporting rod, and a suction cup device is arranged in the structural hole and the avoiding groove; a puncture needle guiding device is arranged on the side edge of the supporting disc, and a rotating sleeve is rotationally connected to the upper end of the supporting rod and fixedly connected to a main support body; and a double-layer extrusion device comprises an outer-layer plate rotationally connected to the side edge of the supporting disc, the outer-layer plate is in an arc shape, an inner-layer plate is hinged to the lower end of the outer-layer plate, a tension spring is arranged between the outer-layer plate and the inner-layer plate, a sliding rail is arranged at the upper end of the inner-layer plate, clamping teeth are arranged in the sliding rail, an extrusion rod is rotationally connected to the outer-layer plate, and the lower end of the extrusion rod can be clamped with the clamping teeth.

The invention discloses a high-precision multifunctional variable-temperature magnetoelectric test system, which comprises a shielding box, two Helmholtz coils, an excitation power supply, a temperature control instrument and an electrical test instrument, wherein the shielding box is arranged between the two Helmholtz coils, the two Helmholtz coils are connected with the excitation power supply through leads, and a heating table is arranged in the shielding box; the heating table is provided with an insulating sample table for bearing an electrical sample to be tested, the electrical test instrument is connected with the electrical sample to be tested through a test wire, material magnetoelectric performance test under variable magnetic field angle and intensity conditions is carried outby adjusting the electrical sample to be tested, and temperature control is carried out by connecting the temperature control instrument with the heating table. A material magnetoelectric property test under a variable temperature condition is carried out, and different atmosphere environments are introduced into the shielding box to carry out a variable atmosphere material magnetoelectric property test. The system is simple in structure, can carry out various types of magnetoelectric performance tests, effectively reduces the test cost, can achieve the precise control of a test variable, andimproves the test precision.