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71results about How to "Realize simultaneous control" patented technology

System-on-chip driver of high-subdivision multi-path stepping motor

The invention relates to a system-on-chip drive of a high-subdivision multi-path stepping motor, belonging to the field of motor control and solving the problems that the traditional stepping motor has the defects of low-frequency oscillation and poor high-frequency output and can not meet the requirement that a plurality of stepping motors work simultaneously and coordinately. The output end of a dial-up switch is connected with the input end of an FPGA main control circuit, the FPGA (Field Programmable Gata Array) main control circuit is provided with n paths of motor output ports, each path of motor output port is connected with the input end of an optical coupler isolation circuit, the output end of the optical coupler isolation circuit is connected with the input end of a drive circuit, the output end of the drive circuit is connected with the input end of a three-phase inversion bridge, three output ends of the three-phase inversion bridge are respectively a three-phase drive current output end of the motor, three current mutual inductors are respectively used for acquiring output currents of three output ends of the three-phase inversion bridge, a phase current signal of the stepping motor, acquired from each current mutual inductor, is output to an overcurrent protection circuit, and the output end of the overcurrent protection circuit is connected with the overcurrent control input end of the drive circuit.
Owner:HARBIN INST OF TECH

Two-dimensional cursor movement control system and method based on motor imagery and coded modulation visual evoked potential

The invention discloses a two-dimensional cursor movement control system and method based on motor imagery and coded modulation visual evoked potential. The system comprises an electrode cap, an electroencephalography acquisition instrument, a system control unit, a data processing module, a cursor control module and a visual stimulator, wherein the visual stimulator is provided for a user in an interface display way. The method comprises the following steps that: the user simultaneously executes a motor imagery task and a visual attention task according to a work interface instruction; the electrode cap collects an electroencephalography signal; the electroencephalography acquisition instrument carries out amplification, filtering and analog-digital conversion on the electroencephalography signal; the system control unit separates the electroencephalography data generated by the motor imagery and the visual attention, and then, the electroencephalography data is stored; the data processing module carries out preprocessing, feature extraction and classification identification on two classes of electroencephalography data in sequence; and the cursor control module controls a cursor to carry out continuous two-dimensional movement according to classification identification. The system has the advantages of being high in control accuracy, good in robustness and the like, the continuous movement of a two-dimensional cursor can be realized, and the system can be used for the movement control of a computer mouse.
Owner:NANCHANG UNIV

Intelligent household system and data processing and background control service method thereof

InactiveCN105093943ASave access bandwidthRealize instant operationComputer controlTotal factory controlTime controlCloud server
The invention provides an intelligent household system and a data processing and background control service method thereof. The intelligent household system comprises a router, a real time control and configuration end device, at least one controlled intelligent device, a gateway apparatus, a cloud server and a local data processing center apparatus. The local data processing center apparatus detects devices which access the local network, and sets log data for the devices respectively, and analyzes various log data of the real time control and configuration end device, and controls the controlled intelligent device; and the log data of the real time control and configuration end devices of the same type are shared mutually, and the backup data in the cloud server are updated in real time. The intelligent household system and the data processing and background control service method thereof can save the access bandwidth of the server, and can store the data, related with families, stored in the cloud server in the local data processing center apparatus; and the local data processing center apparatus provides user data service and data support without requirement for accessing the cloud server, thus saving the access bandwidth of the cloud server.
Owner:深圳市艾瑟网络技术有限公司

Photovoltaic inverter control method under condition of asymmetrical voltage sag

The invention discloses a photovoltaic inverter control method under the condition of asymmetrical voltage sag and belongs to the technical field of photovoltaic power generation control. The method comprises steps of building a photovoltaic array model according to a photovoltaic cell teaching model and engineering practical cell parameters, extracting positive and negative sequence components of network voltage, calculating a reference value of output current on the basis of a flexible active and reactive control (FARC) strategy and analyzing an inverter output?power fluctuation?rate and an output current?harmonic total distortion rate on the basis of the FARC strategy, and using a proportional?resonant (PR) controller in a static coordinate system to design a grid-connected current control structure. PSCAD/EMTDC software is used for building a corresponding simulation?model. Grid-connected control and good dynamic performances can be realized whether under the symmetrical voltage condition or the asymmetrical voltage condition. The method has the advantages that grid-connected current control on the photovoltaic inverter under the condition of asymmetrical voltage sag can be effectively realized, the output?power fluctuation?rate and the output current?total harmonic distortion rate are smaller than those when other control strategies are adopted, and an asymmetrical fault ride-through capability of a photovoltaic plant can be improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Active and passive integrated vibration isolation device and vibration isolation platform

ActiveCN105129112AVibration amplificationOvercoming the small amplitude of micro-vibrationSpacecraft guiding apparatusVibration accelerationControl system
The invention discloses an active and passive integrated vibration isolation device and a vibration isolation platform. The vibration isolation device comprises an elastic plane net structure, an active electromagnetic dynamic vibration absorber, and a piezoelectric stack actuator. The elastic plane net structure is formed by weaving steel wires in a tensioning and crossed manner. The active electromagnetic dynamic vibration absorber is arranged on the intersection of a central region of the elastic plane net structure. The piezoelectric stack actuator is arranged on the edge position of the elastic plane net structure. The vibration isolation platform comprises the vibration isolation device, a bearing cylinder, an intermediate support, and a control system. A satellite attitude control device assembly is arranged on the intermediate support. The intermediate support is installed on the vibration isolation device. The vibration isolation device is installed on the inner side of the bearing cylinder. The control system is used to control the active electromagnetic dynamic vibration absorber according to vibration acceleration information of the intermediate support, and control the piezoelectric stack actuator according to the vibration acceleration information of the bearing cylinder. The vibration isolation device and the vibration isolation platform are effective for low-frequency line spectrum, and have good control effect on broadband random excitation.
Owner:SHANGHAI JIAO TONG UNIV

Control method and system of permanent magnet synchronous motor

The present invention discloses a control method and a system of a permanent magnet synchronous motor. The method comprises the steps of conducting the closed-loop control and outputting a q-axis given current according to a received given torque and a feedback torque, and calculating to obtain a d-axis optimal current according to the q-axis given current; correcting the q-axis given current and the d-axis optimal current, and conducting the closed-loop control to obtain a q-axis given flux linkage, a d-axis given flux linkage, a q-axis given current and a d-axis given current based on the corrected q-axis given current, the corrected d-axis optimal current and a corresponding feedback current; according to the given flux linkages, the given currents and a corresponding feedback flux linkage, calculating a q-axis output voltage and a d-axis output voltage; according to the q-axis output voltage and the d-axis output voltage, calculating to obtain a corresponding switch pulse by using the SVPWM control method, and sending the switch pulse to a corresponding inverter. According to the technical scheme of the invention, the current control and direct torque control are combined together, so that the torque and the current are controlled at the same time. Therefore, all disadvantages during the conventional direct torque control method can be solved.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST

Bias voltage control method based on double parallel Mach-Zehnder modulator

The invention discloses a bias control method based on a double-parallel Mach-Zehnder modulator, and relates to the field of microwave photonics, optical fiber sensing or optical communication. According to the invention, low-frequency disturbance voltage with a fixed frequency is applied to three bias voltage control ends of the DPMZM; a modulator output signal is fed back to a bias control module by selecting a certain proportion, and after the signal is processed by hardware circuits such as photoelectric conversion, filtering, amplification, sampling and the like, the bias point voltage ofa branch corresponding to the DPMZM is calculated by a bias point control algorithm in the MCU. The bias point voltage and different-frequency disturbance signals of which the three fundamental wavesand the second harmonic waves are not overlapped are superposed and input to a DPMZM bias voltage control port. The three control ports use disturbance voltages with different frequencies, so that feedback information of the control ports is separated in a frequency domain, independent closed-loop control of the three control ports is realized, voltages of three bias points of the DPMZM are adjusted at the same time, and stable control of the DPMZM on any bias point is realized.
Owner:BEIJING UNIV OF TECH

GZG-HT photovoltaic automatic tracking system

The invention provides a GZG-HT photovoltaic automatic tracking system. The system comprises a controller, one set of sensors and multiple sets of driving devices, and the controller is provided with the sensors and controls motion of the driving devices simultaneously; the system further comprises transmission devices arranged above the corresponding driving devices and multiple independent photovoltaic tracking subsystems. According to the GZG-HT photovoltaic automatic tracking system, photovoltaic modules automatically rotate and track sunlight in the latitudinal direction and are manually adjusted according to season changes in the longitudinal direction, the single controller is connected to the peripheral photovoltaic tracking subsystems simultaneously in a controlling mode, and linkage control is achieved. Meanwhile, an agriculture and light complementary photovoltaic power generation mode achieving photovoltaic power generation on the upper portion and agricultural planting on the lower portion is established, power generation units achieve bidirectional tracking in the latitudinal direction and the longitudinal direction, and large-scale cultivation of crops under frames is achieved. Compared with a traditional fixing mode, by means of the photovoltaic power generation mode, the light energy transforming rate and crop yield can be greatly increased, multiple purposes of one field are achieved, the income of farmers is increased, the benefits of enterprises are increased, the tax income of the government is increased, and the benefit of environment is increased.
Owner:陕西航泰电气股份有限公司

Multi-stage single-dual-control flow regulation switch valve

The invention discloses a multi-stage single-dual-control flow regulation switch valve. The multi-stage single-dual-control flow regulation switch valve comprises a valve body and a shunting valve core, wherein the valve body is provided with a water inlet and at least two water outlets, and the shunting valve core is arranged in the valve body. The multi-stage single-dual-control flow regulation switch valve is characterized by further comprising a pressing assembly, flow regulation assemblies and multi-stage switching structures, wherein the pressing assembly is arranged in the valve body, is connected with the shunting valve core, and is used for driving the shunting valve core to switch the water inlet to communicate with any effluent water; the flow regulation assemblies are arranged in the valve body; the multi-stage switching structures are used for connection and cooperation between the pressing assembly and the flow regulation assemblies; each of the multi-stage switching structures comprises a regulation member and a linkage part which are matched with the flow regulation assemblies, and besides, height difference is formed between the regulation members; the linkage parts are shaped in the pressing assembly. The multi-stage single-dual-control flow regulation switch valve provided by the invention is simple in structure and easy to realize, and not only realizes the functions of a conventional pressing switch, but also can have flow regulation functions, and besides, the flow regulation functions can be in discretionary combination and use.
Owner:FUJIAN XIHE SANITARY WARE TECH

Internet of things wall switch

The invention discloses an internet of things wall switch, and aims at controlling the working states of electric appliances. The internet of things wall switch comprises a micro processing chip, a radio frequency module, an infrared module and a program module, wherein the radio frequency module is provided with a radio frequency transmission sub-module and a radio frequency reception sub-module,and is electrically connected with the micro processing chip; the infrared module is provided with an infrared transmission sub-module and an infrared reception sub-module, and is electrically connected with the micro processing chip; and the program module is executed by the micro processing chip through the following steps of enabling a user to transmit an infrared signal carrying control information, enabling the micro processing chip to receive the infrared signal transmitted by the user through the infrared module, enabling the micro processing chip to extract the control information from the infrared signal, and enabling the micro processing chip to control the states of one or more electric appliances through a radio frequency communication module according to the control information. The internet of things wall switch is compatible with an infrared control manner and a radio frequency control manner, and is capable of realizing the synchronous control for a plurality of electric appliances through one remote control.
Owner:荣高平

Pull-type display structure suitable for flexible scroll screen and electronic equipment

PendingCN114125107AEasy to operateRealize staying at any positionTelephone set constructionsElectric machineryEngineering
The invention provides a flexible scroll screen pulling type display structure and electronic equipment, the flexible scroll screen pulling type display structure comprises a flexible screen, a shell assembly, an under-screen supporting assembly and a transmission assembly, the shell assembly comprises a fixed shell and a movable shell which are in sliding connection, the movable shell moves relative to the fixed shell, and the under-screen supporting assembly is installed in the shell assembly; the transmission assembly is arranged in the fixed shell and comprises an upper rack and a lower rack which move in opposite directions, a stainless steel band of which one end is fixed on the upper rack and the other end winds the transmission assembly and is fixed on the lower rack, and a stepping motor for controlling the upper rack and the lower rack to move; and the flexible screen covers the stainless steel bands of the shell assembly, the under-screen supporting assembly and the transmission assembly. According to the scheme, the purpose of opening and closing the flexible screen display equipment is achieved through the linkage relation between the transmission assembly and the flexible screen, switching of the large screen and the small screen of a user is achieved, operation is easy and convenient, the requirement of the user for the large-size screen is met, meanwhile, carrying is convenient, and the user experience degree is improved.
Owner:成都拓米电子装备制造有限公司

A Rotary Valve for Large Oxygen Concentrator

The invention discloses a rotary valve for a large oxygenerator. The rotary valve comprises a stationary sheet, a movable sheet, springs and a transmission sheet which are assembled on a motor shaft. A silencing hood covers the outer side; a proximity switch is fixedly arranged on the side face of the silencing hood; an iron sheet is correspondingly arranged on the movable sheet; an air inlet hole, an air inlet control hole A, an air inlet control hole B, an exhaust control hole A, an exhaust control hole B and two balancing control holes are formed in the stationary sheet, wherein openings at one ends communicate with the upper surface of the stationary sheet; an air inlet channel, an exhaust channel and a balancing channel which are connected one another are arranged on the movable sheet; the balancing channel communicates with an air inlet groove; the air inlet hole communicates in the air inlet groove; the air inlet channel, the exhaust channel and the balancing channel are arranged when the movable sheet rotates to different positions, so that when the air inlet control hole A / the air inlet control hole B is connected to the air inlet channel, only the exhaust control hole B / the exhaust control hole A is connected to the exhaust channel, and when the air inlet control hole A and the air inlet control hole B are connected to the air inlet channel at the same time, only one of the balancing control holes is connected to the balancing channel.
Owner:山东美迪宇能医疗科技有限公司

Programmable-control four-channel valve device and using method thereof

The invention provides a programmable-control four-channel valve device and a using method thereof, and relates to the field of automatic control valves for controlling fluid valves. By adoption of the programmable-control four-channel valve device and the using method thereof, the problems that internal leakage and external leakage happen to an existing pneumatic valve and an existing electric valve, the utilization rate of an execution element is low, and an electromagnetic valve can only achieve control over opening and closing and cannot be used for adjusting the opening degree are solved. The programmable-control four-channel valve device is composed of a stepping motor, an elastic coupling, a motor support, a mounting base, a base, a cam mechanism, a first driven mechanism, a second driven mechanism, two hose fixing frames, eight hose connectors, a first channel hose, a second channel hose, a third channel hose, a fourth channel hose and a PLC. The using method of the programmable-control four-channel valve device comprises the first step of control over the on-off state of a first channel and a second channel, the second step of control over the on-off state of a third channel and a fourth channel, the third step of control over the opening degree of the first channel or the second channel, and the fourth step of control over the opening degree of the fourth channel or the third channel.
Owner:HARBIN INST OF TECH +1

Walking-assisting lifting mechanism for old people going upstairs

ActiveCN112674997AImplement the boost functionImproved stability when going upstairsWalking aidsOlder peopleEngineering
The invention discloses a walking-assisting lifting mechanism for old people going upstairs. The mechanism comprises a control box, wherein a first transmission rod and a second transmission rod are arranged in the control box, front columnar frames are symmetrically arranged on the two sides of the control box, front auxiliary supporting legs are arranged on the front faces of the bottoms of the front columnar frames, first lead screws are arranged in the front columnar frames and are connected with the first transmission rod, first lead screw nuts are arranged on the first lead screws, front supporting feet are arranged at the bottoms of the front columnar frames and connected with the first lead screw nuts, rear columnar frames are arranged on the back faces of the front columnar frames, rear auxiliary supporting feet are arranged at the bottoms of the rear columnar frames, second lead screws are arranged in the rear columnar frames, a third transmission rod is connected with the second transmission rod. the second lead screws are connected with the third transmission rod, second lead screw nuts are arranged on the second lead screws, and rear supporting legs are arranged at the bottom of the rear columnar frames and connected with the second lead screw nuts. Through the arrangement of the overall structure, the mechanism has the advantages of being good in stability, high in safety, simpler in structure, lower in price and convenient in use and popularization.
Owner:ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Rolling device and rolling method of compound copper and aluminum busbar

The invention provides a rolling device and a rolling method of a compound copper and aluminum busbar. The rolling device comprises a main motor connected with a reducer, wherein the reducer is connected with a driving system, a coupler is connected with two plain rolls on a main frame, and the main frame is fixed on a base; the main frame is fixedly provided with an upper bearing block and a lower bearing block, the upper bearing block is provided with an upper plain roll, and the lower bearing block is provided with a lower plain roll and an adjusted blending plate; the adjusted blending plate is provided with a U-shaped slot in which a vertical roll is vertically installed, a closed rolling space is formed by the upper plain roll, the lower plain roll and two vertical rolls and the adjusted blending plate is fixedly connected with a guide device. According to the rolling device provided by the invention, the synchronous control and mutual cooperation on the plain rolls and the vertical rolls can be realized to adjust and roll products of different specifications; the four sides of a supplied material are limited by the closed hole pattern processing, therefore the adhesive strength of a product can be improved; furthermore, according to the processing method, the processing times can be reduced and the processing efficiency can be improved.
Owner:YANTAI FISEND BIMETAL
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