141results about How to "Realize synchronous transmission" patented technology

The invention relates to the audio-video synchronization technology and discloses a method for synchronously pushing audios and videos in a video conference to realize true synchronous audio-video sharing. The method includes that sharing source equipment accesses a video conference terminal by means of a network, the video conference terminal initiates a sharing command to the sharing source equipment and an MCU (microprogrammed control unit), the sharing source equipment collects own audio-video data and pushes the data to the video conference terminal, and the video conference terminal sends audio-video data flow to the MCU which forwards the data flow to client terminals of participants; when the sharing source equipment collects the audios and videos, a time shaft is established and a time stamp is established for each collected data flow packet to guarantee time synchronization during playing; when the MCU forwards media stream data, a synchronous tracking thread is established to automatically track and synchronously update the media stream data; when the client terminals receive media stream for decoding playing, and synchronous playing is performed according to time shaft information. The method for synchronously pushing audios and videos in the video conference is suitable for synchronous sharing of audios and videos in a video conference system.

The invention provides a noncontact electric energy and signal synchronous transmission system and a control method thereof, wherein the noncontact electric energy and signal synchronous transmission system and the control method belong to synchronous transmission systems and control methods thereof. The noncontact electric energy and signal synchronous transmission system comprises a DC voltage link, a high-frequency inversion link, a primary side energy conversion link, a secondary side energy conversion link, a primary side signal modulation link, a secondary side signal demodulating link and a load. The high-frequency inversion link is parallelly connected with the primary side energy conversion link and the primary side signal modulation link, thereby respectively forming a fundamental wave extraction channel and a third harmonic extraction channel. Through switching on and off a switching device in the primary side signal modulation link, the signal is loaded in a third harmonic channel circuit. A signal current is coupled with the primary side energy conversion link through a unity-coupled transformer. After an energy current and the signal current are simultaneously transmitted to the secondary side by a same loose coupling magnetic path mechanism, the energy current is separated from the signal current through the secondary side energy conversion link and the secondary side signal demodulating link, thereby realizing simultaneous transmission of the electric energy and the signal. The noncontact electric energy and signal synchronous transmission system and the control method thereof further have advantages of stable output power, high signal transmission rate, small size and high efficiency.

The invention discloses a method for the non-contact type synchronous transmission of energy and signal. The method is characterized by comprising the following steps: establishing an AC electric energy transmission system of non-contact type; mounting a signal modulator in a primary loop; providing a digital signal for the signal modulator; extracting signal characteristics from a secondary loop and restoring the digital signal when the secondary loop receives electric energy; and finally realizing the non-contact type synchronous transmission of the energy and the signal. The non-contact type device for synchronously transmitting energy and signal, which is used for realizing the method, is provided with a DC power supply, an inverter and an exciting coil in the primary loop and characterized in that the signal modulator in the inverter is connected with a digital signal input unit and provided with a signal extracting and restoring circuit; and the output end of the signal extracting and restoring circuit outputs the restored digital signal. The invention has the advantages of easiness, practicability and low cost, restores the energy as a digital signal and has higher system reliability.

The invention relates to a digital medical image system, in particular to an electronic endoscope image system and an electronic endoscope image processing method. The electronic endoscope image system comprises a front end endoscope, an image processing board and a video monitor. The image processing board integrates a video acquisition and coding circuit, a DSP and a video decoding and drive amplifying circuit. The output of a CCD image sensor of the front end endoscope is connected with the video acquisition and coding circuit through signals, the output of the video acquisition and coding circuit is connected with the DSP, the output of the DSP is connected with the video decoding and drive amplifying circuit, and the video decoding and drive amplifying circuit is connected with the video monitor through a video output interface. The electronic endoscope image processing method includes the steps that image information acquired by the CCD image sensor is preprocessed with a wavelet transform and threshold shrinkage method, images are denoised and enhanced to obtain enhanced images, and then the images are decoded and displayed through the video monitor.

The invention provides a master-slave distributed system which comprises a master system consisting of PC104 modules, and slave systems consisting of a plurality of 51 single-chip microcomputers. A dual-port RAM is taken as a buffer area for data interaction between the master system consisting of the PC104 modules and the slave systems consisting of a plurality of 51 single-chip microcomputers. The system further comprises a programmable logic device. The system has the advantages of high transmission speed, good real-time characteristic, high reliability and simple circuit. Parallel communication between the PC104 and a plurality of 51 single-chip microcomputer systems can be achieved without address access conflict by combining the application of the programmable logic device. The invention also provides a parallel communication method which is applied to the master-slave distributed system.

The invention discloses a 2FSK-based wireless energy and signal synchronous transmission system and method. The system is formed by a primary circuit and a secondary circuit. An energy emission circuit and an energy receiving circuit are both double resonance circuits. The primary circuit is provided with a 2FSK modulation circuit. The secondary circuit is provided with a 2FSK demodulation circuit. The 2FSK demodulation circuit includes two signal pickup loops. The two signal pickup loops are inductively coupled to the energy emission circuit. The resonant frequencies of the two signal pickup loops correspond to the two frequencies of high frequency inversion signals output by an inversion circuit respectively. Signals output from the two signal pickup loops demodulate digital signals emitted by the primary circuit through a voltage comparator. The substantial effects are that wireless energy transmission and information synchronous transmission are achieved, demodulated digital signals can be directly output without an MCU, the circuit structure is simpler, and the cost is lower.

The invention relates to a wireless parallel transmission method for an energy and signal shared channel and belongs to the field of radio energy transmission. The wireless parallel transmission method is used for solving the problem that the implementation of synchronous transmission of wireless energy and information needs two channels. According to the wireless parallel transmission method for the energy and signal shared channel, provided by the invention, a system primary side circuit and a system secondary side circuit adopt a pair of coils as a shared channel and achieve the parallel synchronous transmission of the information and the energy by adopting the same frequency; the system primary side circuit achieves the forward transmission of the information in a variable frequency manner, and the system secondary side circuit achieves the reverse transmission of the information in a controllable rectifying manner. The method is applied to wireless radio energy transmission.

The invention relates to a MIDI file structure and a generating apparatus for Gongche notation. The MIDI file structure also comprises image signal parts of the Gongche notation and the image signal parts of the Gongche notation comprise notation image signal information of musical works, with a file comprising a plurality of notation image signal data areas. The image signal parts of the Gongchenotation are the extension on the basis of the MIDI signal part, with one being the extension after a MIDI file header information part and the other being the extension after a MIDI track part. A user can easily receive audio signals transmitted by MIDI multi-track signals while reading the Gongche notation. The file structure and the generating apparatus realize the synchronized storage and transmission of audio signals and the image signals, because the MIDI signals and image signals can be synthesized or resolved from the MIDI file for a specific Gongche notation by the generating apparatus.

The invention relates to agricultural machinery, in particular to a corn peeling and threshing all-in-one machine. The machine comprises a rack, a peeling device and a threshing device, the peeling device and the threshing device are arranged in an inclined mode, the angles of inclination of the peeling device and the threshing device are opposite, the directions of feed inlets of the peeling device and the threshing device are opposite, the peeling device and the threshing device conduct transmission through a middle shaft, and belt wheels are located at the sides of the feed inlets of the peeling device and the threshing device. Accordingly, the problem that a discharge hole of the threshing device and a belt wheel transmission mechanism are located at the same side of the machine, and production safety accidents are likely to be caused is solved.

The invention provides a surface plasma transmission device, a manufacturing method and an application, and relates to the field of electronic parts and components. The surface plasma transmission device comprises a substrate, a nanometer waveguide and electrodes, wherein the nanometer waveguide and the electrodes are arranged on the substrate, the nanometer waveguide is connected with at least two electrodes, and the endpoints of the nanometer waveguide are exposed out of the electrodes. The manufacturing method of the surface plasma transmission device comprises the steps that a mark is manufactured on one side of the substrate through electron beam lithography; then, a silver nanowire is formed on the side with the mark of the substrate in a sedimentation mode; the silver nanowire is positioned according to the mark, the electrodes are etched on the substrate through electron beam lithography, wherein the silver nanowire is connected with at least two electrodes, and the two endpoints of the silver nanowire are exposed out of the electrodes. The surface plasma transmission device is small in size and capable of transmitting plasma and electrons at the same time, so that the transmission speed and transmission quantity of an existing information transmission device are increased remarkably, and the surface plasma transmission device can be applied to nanometer parts and components. The manufacturing method of the surface plasma transmission device is novel and ingenious.

The present invention provides a multi-media file transmission method and device. The multi-media file transmission method comprises: building multimedia files according to a received building instruction; and timely sending the built multimedia files to a target terminal according to a preset transmission mode. According to the invention, the transmission time of multimedia files is saved, the transmission efficiency of the multimedia files is enhanced, the user operation is simplified and the user experience is improved.

The invention provides an audio/video transmission method and device. The method comprises following steps of determining the minimum length of video fields in MAC (Media Access Control) frames according to the total length of the MAC frames and a preset video transmission efficiency threshold value; determining the minimum length of audio fields in the MAC frames according to the total length of the MAC frames and a preset audio sampling efficiency threshold value; determining the maximum length of information fields in the MAC frames according to the length of the custom fields in the MAC frames, the minimum length of the video fields and the minimum length of the audio fields; filling to-be-transmitted audio/video data to the custom fields of the MAC frames according to the minimum length of the video fields, the minimum length of the audio fields, the maximum length of the information fields and actual transmission demands; and sending the data to a receiving end. Through application of the embodiment of the method and the device, synchronous audio transmission can be realized by using existing twisted pair on the basis of transmitting high-definition videos by using the twisted pair.

The invention provides a robot control method based on 5G. The method is applied to a robot control system, the control system comprises a main control unit and an execution unit, the main control unit and the execution unit are provided with a 5G communication module respectively, and the main control unit and the execution unit are in 5G communication wireless connection through the 5G communication modules; the control method comprises the steps that S101, the main control unit receives information, and judges whether a preset instruction is generated or not according to the received information; if yes, S102 is executed, and if not, S101 is executed; S102, the preset instruction is sent to the 5G communication module of the execution unit corresponding to the preset instruction through the 5G communication module of the main control unit; and S103, the 5G communication module of the execution unit receives the preset instruction, and the execution unit finishes corresponding work according to the preset instruction. According to the method, the robot control system is divided into the main control unit and the execution unit, the execution unit and the main control unit are in 5G communication wireless connection, so that the movement range of a robot can be enlarged, the line is simplified, and the maintenance difficulty is reduced.

The invention discloses a spatial data synchronization method, a terminal and a computer readable storage medium, belongs to spatial data synchronous transmission, and aims to solve the technical problem of how to provide a spatial data synchronization method which is high in performance and capable of realizing synchronization in case of network disconnection. The synchronization method comprisesthe following steps: performing primary format conversion on spatial data in a source database based on a data format supported by an intermediate cache; caching the spatial data subjected to the primary format conversion in an intermediate cache in real time; and if the network state is good, sending the spatial data subjected to secondary format conversion to the target database in real time based on the data format supported by the target database, and if the network is blocked or the efficiency is poor, temporarily storing the spatial data subjected to primary format conversion in messagemiddleware. The terminal comprises a processor and a memory. The processor is configured to call a program instruction to execute the synchronization method. A computer program is stored in the storage medium, and the processor executes the method when program instructions are executed by the processor.

The invention belongs to the technical field of drilling engineering, and particularly relates to a magnetic coupling energy-carrying reverse communication method for underground measurement while drilling, which is characterized by comprising the following steps of: 1, driving a drill bit to rotate by a generator short section; 2, expoloring measurement signals of a geological parameter sensor and sending the signals to the main control circuit short section through a wireless magnetic coupling communication and energy carrying device; The engineering parameter sensor transmits a measurementsignal to the wireless receiving short section through the wireless magnetic coupling communication device; And step 3, enabling the wireless receiving short section to carry out signal amplification,filter and perform demodulation processing and upload the processed signals to a ground system. Electromagnetic induction principle is utilized;, Wireless non-contact communication is achieved in a wireless magnetic coupling communication mode, the wireless magnetic communication process is superposed, synchronous transmission of electric energy and information of a common coupling mechanism is achieved, the problems that a communication carrier is prone to structural damage, poor in reliability, short in service life and the like due to underground high temperature, strong corrosion and sealing requirements are solved, and the data transmission reliability is improved.

The invention discloses a counteraction type mechanical part anti-splashing welding device and a using method thereof, and the counteraction type mechanical part anti-splashing welding device comprises a main body mechanism, a double-rack synchronous type centering advancing mechanism, a gantry bearing type welding mechanism, a semi-surrounding type blocking protection mechanism, a convection leveling anti-splashing gettering mechanism, a self-adaptive attaching clamping mechanism and a welding point positioning mechanism, the double-rack synchronous centering advancing mechanism is arranged on the bottom wall of the main body mechanism, the gantry bearing type welding mechanisms are arranged on the two sides of the main body mechanism, and the semi-surrounding type blocking protection mechanism is arranged on the upper wall of the main body mechanism. The invention belongs to the field of welding of spare and accessory parts, and particularly relates to an anti-splashing welding device for reaction type mechanical spare and accessory parts and a using method of the anti-splashing welding device. According to the anti-splashing welding device for the reaction type mechanical parts, one-time positioning and three-point fixing, clamping and welding can be conducted on two welding workpieces, and smoke and welding slag generated during welding can be subjected to reverse action collection treatment.

The invention discloses a vision-based precision approach path indicator flight check method, which belongs to the technical field of aviation flight check. A camera carried by a plane input an acquired video sequence into a computer in real time, and salient region detection is sequentially carried out on images of current frames. Midpoints of rectangular regions in the images of the current frames are sequentially found out as coordinates of stable light spots of each PAPI (precision approach path indicator) lamp at corresponding moments. The stable light spot at the later moment and the stable light spot at the previous moment are matched for the same PAPI lamp. The moment when each light spot turns from white to red is found out, and when a similar distance delta d is greater than a threshold value T2, the light spot is believed to turn from white to red. A curve of the change of delta d with time t is drawn, and color change moments tn of the four lamps are sequentially recorded.Plane positioning data at each change moment are acquired, and after the altitude of the plane and the horizontal distance between the plane and the lamps are obtained, elevations of the four PAPI lamps are calculated. The method increases the precision of flight check, the efficiency of flight check and the integrity of check.