255results about How to "Realize synchronous control" patented technology

The invention relates to a multi-scene streaming media courseware recording and direct-broadcasting method, which is characterized in that a recorded teacher camera video multimedia file is synchronized with a screen video multimedia file through a screen video key frame interpolation algorithm in recording; real-time video stream and real-time audio stream are coded to a transport stream (TS) file by synchronously encapsulating and multiplexing a video (PES) photoelectric scanning packet and an audio PES packet to be distributed to a web direct-broadcasting server, the teacher camera video and the screen video are synchronously broadcasted through the multi-video-source synchronous direct-broadcasting control. The method supports the windows/Linux cross-platform run and also supports the multi-source recording and stream direct-broadcasting technology of the teacher camera video, the teacher audio and the screen video, and the media courseware can be directly broadcasted while being recorded.

The invention relates to a system and a method for improving the read-write success rate of radio frequency identification (RFID) tags on a movement production line. The system consists of a production management application server, read-write control, data detection, error correction control and security protection; the read-write control, the data detection, the error correction control and the security protection are respectively connected with the production management application server through a wired network and/or a wireless network; four different terminals using a computer, RFID, automatic control and the like and the production management application server execute tasks respectively set and are tightly matched; the data in the RFID tags is subjected to the functions, such as precise identification, multiple writing, verification, information protection, and automatic sorting of failure lags on the movement production line; the read-write success rate of the RFID lags data on the movement production line is remarkably improved; the productive efficiency is optimized; and the intelligent management for the production line is realized, so the system and the method provided by the invention have excellent polularization and application prospects on the modern industrial production line.

The invention relates to an online vibration control tilting-pad radial sliding bearing device which comprises a state-adjustable tilting-pad radial sliding bearing, a detection unit, a control unit and an execution mechanism, wherein the radial position of each pad of the state-adjustable tilting-pad radial sliding bearing can be adjusted in real time; in the detection unit, a high-precision vibration sensor is mounted near the tilting-pad sliding bearing and connected with a main control computer; the control unit mainly comprises a main control computer and is connected with a servo motor and an automatic stop protection system (alarm); and the execution mechanism comprises a ball screw connected with the servo motor, a wedge block mounted on a screw nut and a support block in contact with the wedge block. The device provided by the invention judges the bearing state through the collected vibration signal in the operation process, performs corresponding adjustment on the radial position of the tilting pad according to the judgment result, and even executes automatic stop protection so as to realize online control on the bearing vibration to meet control requirement for vibration in the actual operation process of the bearing.

The invention discloses an ultra-wideband high-bandwidth radio frequency two-way transceiving integrated integration module, belonging to the technical field of wireless information transmission. Themodule comprises a main control unit, a power supply unit, a microwave frequency synthesis unit, a radio frequency transmission unit, a radio frequency receiving unit, a digital signal processing unitand a radio frequency transceiving control unit, wherein the main control unit is mainly used to complete bus driving, data interaction, signal processing and other functions; the power supply unit is used to provide a high-stability and low-noise power supply; the microwave frequency synthesis unit, the radio frequency transmission unit, the radio frequency receiving unit and the digital signalprocessing unit adopt a microwave frequency synthesis technology, a wideband frequency conversion technology, a signal conditioning technology, a wideband modulation and demodulation technology and adigital signal processing technology to achieve the maximum one-way 8*8 or two-way 4*4 radio frequency transceiving; and the radio frequency transceiving control unit is used to achieve radio frequency transceiving control. The radio frequency two-way transceiving integrated integration module disclosed by the invention is easy to integrate, can be expanded, and can meet the requirements of large-scale MIMO radio frequency multi-channel transceiving.

The invention provides an auto-disturbance-rejection iterative learning-based multi-motor synchronous control method, which comprises the steps of building a mathematical model of a multi-motor system and initializing a system state and a control parameter; designing a multi-motor speed tracking controller on the basis of an iterative learning method; and designing an iterative expansion state observer by combining an auto-disturbance-rejection control strategy, and effectively estimating an unknown term in the system and compensating the unknown term through repeated iteration. An improved adjacent coupling strategy is provided to design multi-motor synchronous control. The problem of the speed consistency of the multi-motor system can be effectively solved; the fast convergence performance and the tracking accuracy of the system are improved; and the robustness of the multi-motor system is strengthened.

The invention discloses a music synchronous playing method and system based on a WIFI (Wireless Fidelity) protocol. The music synchronous playing method comprises the following steps: acquiring a Beacon data packet carrying a synchronization timestamp transmitted by a wireless access point through master and slave audio equipment; extracting the synchronization timestamp from the received Beacon data packet, and synchronizing local clocks of the master and slave audio equipment into a lock of the synchronization timestamp; acquiring audio data through the master audio equipment, and adding playing timestamps to headers of each frame of audio data; and transmitting the audio data and the playing timestamps to the slave audio equipment, so that the master and slave audio equipment plays music at the playing timestamps. Through adoption of the music synchronous playing method and system, time synchronization of a multi-room system is realized, and a very good effect is achieved by means of an underlying protocol of a WIFI network through the timestamp in the Beacon data packet without increasing the network load or using a WIFI network clock synchronization protocol 802.11V.

The present invention discloses a networked multi-axis motor synchronization control device and method. The device comprises a pulse collection module, a controller module, a synchronization serial difference bus, a multi-axis module, a servo motor drive module and a man-machine interaction module. The method comprises: the pulse collection module collects pulse signals outputted by a host command motor, the pulse signals are subjected to optoelectronic isolation processing and then are sent to the controller module, the controller module performs periodic sampling count of the received pulse signals, the pulse count is sent to the multi-axis module through the synchronization serial difference bus, and the multi-axis generates PWM control signals through the current data frame and the feedback pulse signals of a slave motor. The networked multi-axis motor synchronization control device and method is simple in structure and can realize the high-precision synchronization control of the multi-motor through the network and the remote monitoring of the field data.

The invention discloses a multi-camera synchronous control device base on a GPS and a pulse generator as well as a multi-camera synchronous control method. The multi-camera synchronous control device comprises a GPS receiver, the pulse generator, a plurality of camera units, a plurality of high-speed image collectors and a plurality of image collecting and processing computers. As an external triggering source model of high-speed cameras is adopted by the multi-camera synchronous control device, based on the GPS time service, the device guarantees the time synchronization according to the synchronous pulse per second emitted by a satellite at the initiative moment of each second to realize the synchronous control on multiple cameras. The multi-camera synchronous control device is high in synchronization precision and reliability, simple and practical.

The invention discloses a method for controlling silicon single crystal growth temperature on the basis of finite element numerical simulation. The method comprises the following steps: firstly, finite element modeling is performed by referring to crystal shape, and reference shape and boundary conditions of crystals in the whole process are set; the optimal trajectories, meeting constraints, of crystal temperature and heater power are calculated in an offline optimized manner with an optimization method by adopting the highest crystal cooling speed as the target and adopting adjustable rangeof the heater power and the maximum temperature gradient in the crystals as constraint conditions, and the optimal trajectories are used as reference input of a control system; then, crystal radius iscontrolled; finally, tracking control is performed on temperature trajectory in the crystals. The problem of crystal dislocation defect caused by the fact that crystal temperature control cannot be realized with the silicon single crystal growth control method in the prior art is solved.

The invention provides an artificially assembled and disassembled automatic guided vehicle control system which comprises a battery, a control module, a motor controller, a first motor, a second motor, a signal processor and a mechanical device, wherein the control module sends a control signal to the motor controller, and the motor controller respectively controls the operation of the first motor and the second motor so as to drive the mechanical device to move; and the drive signal of the first motor and the second motor is synthesized by the signal processor to control the movement of the mechanical device. The control module is a dual-core controller which comprises an upper computer system and a movement control system arranged on an ADSP (Advanced Signal Processing) circuit and an FPGA (Field Programmable Gate Array) circuit, and the upper computer system comprises a human-computer interface, a path planning module and an online output module; the movement control system comprises an encoder module, an input and output control module, a data memory module and a servo control system, wherein the servo control module is realized by the FPGA circuit and other modules are realized by the ADSP circuit.

The invention discloses an adjacent coupling type multi-motor speed tracking and synchronous control method based on a fuzzy disturbance self-resistance and self-adaptive sliding mode, comprising steps of establishing a mathematic model of a multi-motor system, initializing a system state and a control parameter; designing a multi-motor speed tracking controller based on the fuzzy disturbance self-resistance method; and designing a multi-motor synchronization controller based on the improved adjacent coupling and the self-adaptive sliding mode. The adjacent coupling type multi-motor speed tracking and synchronization control method based on the fuzzy disturbance self-resistance and self-adaptive sliding mode can effectively solve the consistency problem of the motor system, improves the fast convergence performance of the system and enhances the robustness of the motor system.

The invention provides a multi-channel synchronization method applied to a phased-array radar. The method comprises the steps of base band data synchronization and digital local oscillator synchronization, wherein the base band data synchronization comprises the steps that a trigger signal is received by FPGA to generate a distributing trigger signal, a sampling clock signal is used for collectingthe distributing trigger signal, a synchronous trigger signal is used for completing the collecting and generating of the signal, the digital local oscillator synchronization comprises the steps thata primary module generates an NCO synchronous trigger signal, after the rising edge of a public signal is collected by a reference clock signal, a trigger signal is generated, NCO is synchronously restored by the module to complete the synchronization of the NCO, and therefore the synchronization of a digital oscillator signal is completed. The method has the advantages that the signal generatingand sampling of a high-speed digital member and the synchronous control of digital variable frequencies are achieved to ensure the synchronous operation of a multi-channel digital system of the phased-array radar, multi-channel synchronization of antenna arrays of an active electronically scanned array and digital array radar is achieved, and the demands of beam pointing, efficient spatial powersynchronization and multi-channel transceiving synchronization of a radar system are met.

The invention discloses a guaranteed performance robust decentralized control of a dual-motor servo system, and can realize system load tracking and motor synchronization under the influence of a loadinter-load coupling factor, specific to a tooth space interconnecting item-containing dual-motor servo system. The guaranteed performance robust decentralized control comprises the following steps ofperforming analysis on the tooth space-containing dual-motor servo system, and establishing a state space expression of the dual-motor servo system by adopting a tooth space dead zone model. Specificto the dual-motor servo system, when the unknown nonlinearity of the load end satisfies a Lipschitz condition, the optimal state feedback is designed by a linear secondary type tracker; by combination with a robust controller, a guaranteed performance-based robust decentralized tracking controller is configured by combination with the robust controller. When it is supposed that the unknown nonlinearity of the respective motors is consistent, the optimal integral sliding mode controller is designed so as to realize synchronization between two motors; and by combination of the guaranteed performance-based robust decentralized tracking controller and the optimal integral sliding mode controller of the motor, the actual controller of each motor is configured in order to perform motor synchronous control.

The invention provides a refrigeration and freezing device and a compartment partition assembly thereof. The compartment partition assembly comprises a partition used for partitioning a storage compartment of the refrigeration and freezing device, and provided with a first air port and a second air port in the front part and the rear part separately, a first air door and a second air door which are installed in the partition, and used for adjusting the open areas of the first air port and the second air port separately, and an air door drive mechanism configured to drive the first air door and the second air door to synchronously act, so that the open areas of the first air port and the second air port are synchronously increased or synchronously reduced. The refrigeration and freezing device comprises the storage compartment and the compartment partition assembly, wherein the compartment partition assembly is installed in the storage compartment and used for partitioning the storage compartment into a first sub-compartment and a second sub-compartment; and the refrigeration and freezing device is configured to enable cold air to enter the second sub-compartment through the second air port, complete heat exchange with a stored object in the second sub-compartment, and then flows to the first sub-compartment through the first air port, so that the refrigeration temperature of the second sub-compartment is adjusted through changing the open areas of the first air port and the second air port.

The invention belongs to the technical field of laser power monitoring and discloses a laser power monitoring system and a monitoring method. The laser power monitoring system comprises a laser emission module, a power detection module, an operation module, a central control module, a power control module, a power correction module, a data storage module and a display module. The invention can obtain laser pulses whose laser power varies with the input quantity of the analog input signal through the power control module. Compared with the prior laser pulse power control, the control interfaceis simpler, the control efficiency is higher, and the synchronous control of the laser pulse power can be realized. At that same time, a control current is obtain according to the pow correction module. Laser power curve, the relationship between control current and laser power can be obtained, so that the laser power can be obtained by detecting the control current, and the laser power can be corrected more accurately without adding additional power detection equipment.

The invention discloses a bed net and an application method thereof. The bed net comprises a gear motor, two sides of the gear motor are both provided with rhombic stretchable frames and racks, the racks comprise sawtooth parts and non-sawtooth parts, the gear motor is meshed with the sawtooth parts of the racks, the rhombic stretchable frames comprise first foldable rods and second foldable rods, the tail ends of the first foldable rods are connected with the non-sawtooth parts of the racks, the tail ends of the second foldable rods are movably connected with the cross rods of the bed net, side rods are arranged to be vertical to the cross rods of the bed net, multiple connecting nodes of the first foldable rods and the second foldable rods are connected to sliding rails on the side rods through corresponding sliding blocks, the side rods can move along sliding grooves in the cross rods, and the bed net is connected to the rhombic stretchable frames. According to the bed net, the motor is used for synchronously controlling two stretchable frames, the bed net can be automatically unfolded and withdrawn, human operation is not required, the problem that mosquitoes enter when a traditional bed net drops down is solved, the mosquitoes are effectively prevented from staying on the bed net, and person can be prevented from being bitten when falling asleep.

The present invention discloses a multifunctional electronic pointer. The multifunctional electronic pointer comprises a control handle and a front rod. The multifunctional electronic pointer is characterized in that: the control handle is mainly composed of a processing module and an operation module which are matchingly used; the processing module includes a USB interface, a signal transceiver I, a flash memory driver and a processor; the operation module includes a signal transceiver II and an operation button; the processing module and the operation module are in wireless signal transmission through the signal transceiver I and the signal transceiver II; and the system control with remote control is loaded into the flash memory driver of the processing module in advance, and when the USB interface is connected with a near-end device, the near-end device automatically loads the system control with the remote control. The structure is simple, the design is scientific, and the efficiency of the classroom is improved.

The invention discloses a synchronous control method of a remote high-resolution display system. The synchronous control method includes the following steps of transmitting images of an image part area in the display system by a service side according to image pickup requests of a client side; transmitting images of a control part area in the display system to a display interface of the client side by the service side; operating the corresponding position of the image of the control part area on the display interface by the client side by means of a mouse of the client side; and driving a mouse of the service side to complete operation according to motion events received by the service side, transmitting the images of the control part area to the client side after operation is completed, and displaying on the display interface of the client side so as to substitute the images of the control part area before operation is completed. The synchronous control method of the remote high-resolution display system can realize synchronous operation and control of operation components such as a menu and a tool bar on remote high-resolution displaying equipment.

The invention relates to a single-valve core and double-channel solenoid valve, solving the technical problem that the two channels of the existing solenoid valve can not be easily or synchronously opened and closed, the structure is relatively complex and the weight is heavier. The single-valve core and double-channel solenoid valve comprises a valve body, a valve core and a coil, wherein, the valve core is matched with the valve body for guiding, the valve core generates electromagnetic attraction under the action of the magnetic field of the coil, an axially installed cylindrical spring is arranged between the valve core and the valve body, and a first channel and a second channel which are mutually independent are arranged on the valve body, and the first channel is sealed after a first valve seat is matched with the valve core; the second channel is sealed after a second valve seat is matched with the valve core; and the sealing between the first valve seat and the valve core as well as between the second valve seat and the valve core adopts a combined type soft-hard sealing structure. The invention has the advantages of rapid response, light weight, small volume and good consistency of the action.