212results about How to "Avoid out of sync" patented technology

The invention discloses a vehicle gear-shifting quality evaluation testing method, which comprises the steps of: 1) at a vehicle gear-shifting quality evaluation testing preparation stage: establishing a vehicle database by adopting an SQL (structured query language) server; establishing a vehicle gear-shifting quality evaluation module by adopting MATLAB / Simulink and determining the core algorithm of the vehicle gear-shifting quality evaluation module; and selecting the type of a vehicle to be tested and a testing system to be used; 2) at a vehicle gear-shifting quality testing stage: conducting gear-shifting rule testing, Tip in testing, Tip out testing, Fast Off testing, brake control logic testing, operability testing, start testing, acceleration testing and driving during a traffic jam; and 3) at a vehicle gear-shifting quality evaluation stage: calling data of the vehicle database as data input of the vehicle gear-shifting quality evaluation model and obtaining an evaluation result through data processing and the like; and outputting the evaluation result a graphical user and result display interface. The invention additionally provides a vehicle gear-shifting quality evaluation testing system.

The invention provides a robot vibration suppression method based on an acceleration sensor. The robot vibration suppression method comprises the steps that robot track pre-operation is executed, specifically, the three-shaft acceleration sensor is mounted at the tail end of a robot, and vibration signals in three directions in the mounting position during pre-operation of the robot are collected; vibration parameters of the industrial robot are extracted according to the collected vibration signals; an input forming device is designed according to the obtained vibration parameters; and the input forming device acts on the operation track of the industrial robot so as to correct the operation track of the industrial robot through the input forming device. Through the method of applying input shaping to the industrial robot, the problems that input shaping parameters are difficult to obtain, and shafts move asynchronously due to the input shaping time lag are solved, vibration of the industrial robot can be suppressed, and track precision and positioning precision are improved.

The invention discloses an upwind starting control method of an external fan of a variable-frequency air conditioner, a circuit and an air conditioner thereof. The upwind starting control method detects the initial rotation speed of the external fan, judges whether the rotating direction of the external fan is in a static, positive or negative rotation direction, and adopts the corresponding normal starting mode, forward speed regulation mode and brake mode according to different rotation directions of the external fan to start and control. The upwind starting control method enhances the reliability of upwind starting, avoids loss of synchronism, overvoltage and other faults when upwind starting frequently occurs. The upwind starting control method has the advantages of being simple in circuit, low in manufacturing cost, and high in practicability and universality.

The invention relates to the technical field of rail transportation, and discloses a video information processing method, which comprises the three stages of media designing, media edition and publishing, and media playing. In the media designing stage, the edition and designing of media and materials are realized. In the media edition and publishing stage, a play list, play formats and a play plan are set, each player is mapped with corresponding play formats and configuration information is transmitted to the players after the setting is finished. In the media playing stage, the synthesis superposing playing output of media information is realized, and simultaneously, in a media playing process, data updating and player status reporting with a server are periodically performed. By the method, the video information processing cost of a rail transportation passenger information system can be decreased, the complete synchronization of video pictures and sounds can be ensured and continuous and smooth passenger information pictures with high quality can be provided for passengers.

The invention belongs to the technical field of asphalt and concrete mixing, and particularly relates to a continuous double-horizontal-shaft forced mixer for asphalt and concrete. The continuous double-horizontal-shaft forced mixer for the asphalt and the concrete comprises a mixing tank provided with a feeding port and a discharging port, two mixing shafts which are arranged in the mixing tank in a parallel mode, a driving device which drives the mixing shafts to rotate synchronously and reversely, a plurality of groups of mixing units and a material scraping unit. Each mixing unit comprises mixing arms and blades, wherein the mixing arms are mounted on the mixing shafts in an opposite mode, the blades are mounted on the mixing arms and comprise a feeding blade and a returning blade, and the feeding blade and the returning blade are the same in structure and size and opposite in mounting direction. The material scraping unit comprises a group of mixing arms which are arranged in an opposite mode, and material scraping blades which are connected on the mixing arms, wherein an acute included angle is formed between each material scraping blade and a side plate of the mixing tank. According to the bituminous mixture mixer, namely the continuous double-horizontal-shaft forced mixer for the asphalt and the concrete, the methods of continuous grading feeding, continuous mixing and continuous discharging are used, and the output of the bituminous mixture mixer can reach 100-1,000 tons per hour.

The invention discloses a method and a device for controlling a transmitting power. The method comprises the following steps of reducing a gain factor of a data channel when a total transmitting power exceeds a maximum threshold value of the transmitting power; and after a power ratio of the data channel and a first control channel is less than the threshold value of the power ratio, and if the data channels are in a discrete transmission (DTX) state, setting a second control channel into the DTX state. According to the method and the device for controlling the transmitting power provided by the invention, the problem of data channel demodulation performance reduction caused by introducing noises when a receiving terminal demodulates the data of the data channel as the data channel and the control channel are asynchronous can be solved, and demodulation performance of the data channel during a power control process is improved.

The invention discloses a method for recording an audio and video synchronization timestamp. The method comprises steps: video data and audio data are collected; the length a of the audio data, the frame rate b of the video data and a preset audio sampling rate h are obtained; a new timestamp T is calculated according to the length a of the audio data, the frame rate b of the video data and the preset audio sampling rate h, and T=a / [b / (a / h)]; coding and decoding of the video data and audio data are carried out according to the new timestamp, and the video data and the audio data in synchronization time are obtained. The invention also discloses a device for recording an audio and video synchronization timestamp. A new timestamp is calculated again according to the audio length, the audio sampling rate and the video frame rate, coding and decoding of the audio and video data are carried out according to the new timestamp, thus the audio data and the video data after coding and decoding are synchronous in time, and out of sync of frames and sound during playing caused by record interference is avoided effectively.

The embodiments of the present invention provide a live streaming data transmission method, a live streaming data transmission device, an electronic device, a server and a storage medium. The method includes the following steps that: message information to be sent is obtained; the message information is added to preset data; a first time identifier is added to the preset data; the preset data added with the first time identifier are sent to a server; and the server forwards the preset data added with the first time identifier to a viewing end, and the viewing end can play the message information when playing video information and audio information according to the first time identifier in the preset data. According to the method provided by the embodiments of the present invention adopted,the IM technology in the prior art is not needed to be adopted to transmit the message information, and therefore, hardware devices can be decreased, and at the same time, the out-of-synchronizationphenomenon of the message information, video information and audio information can be avoided.

The invention relates to a switching method of a position-sensor-free direct torque motor control system, wherein a non-disturbance switching section is added in the switching process of the open loop control starting state and the closed loop control operation state, in the non-disturbance switching section, the switching frequency operation is maintained in the switching time period, each parameter estimation quantity required by the motor closed loop control operation is obtained, the preparation is made for the motor from the open loop control starting state to the closed loop control operation state, in addition, each parameter estimation quantity is used as corresponding control parameters of the motor closed loop control operation during the switching, the non-disturbance switching of the motor from the open loop control starting state to the closed loop control operation state is realized, and the switching moment control stability is effectively ensured.

The invention relates to a design method for high efficiency super computing system based on task data flow drive; the method uses reconfigurable internet to interconnect n processing units, memory array and input / output interfaces, each functional parts are reconfigurable and programmable according to task data flow, to realize coordination operation of the whole system, the task data flow is stored in instruction pool of the memory array in instruction mode, the processing unit may take out the instruction to be executed via the reconfigurable internet to store in a cache, then type analysisstatistics is executed, the processing unit executes the computation of structure reconstruction according to the result of the type analysis statistics; the invention provides a design method for high efficiency super computing system based on task data flow drive, the method may realize self-adaptive computation through the processing unit may configure programming, programmable internet, and other programmable software and hardware, so as to realize optimum performance of a computing system.

The invention provides an audio and video composite device and a method and a device for synchronizing audio and video thereof. An audio buffer zone and a video buffer zone are respectively prepared for an audio channel and a video channel; audio data and video data acquired are respectively sent to corresponding buffer zones; and whether the audio data and the video data are synchronous is judged by setting a synchronization identifier so as to ensure to acquire synchronous audio data and video data and avoid a phenomenon that the audio data and the video data are not synchronous because the time required for initiating the audio and video channels are different. The synchronous audio data and video data are acquired, and the synchronization of sound and images is ensured, and the acquired synchronous audio and video data are transmitted.

The invention relates to a multiple-leg-choice movable sofa machine stretching apparatus. The apparatus comprises a left part, a right part, a switch part, an extension spring, a self-locking spring and a backrest return spring, and the left part and the right part are respectively provided with same leg structures, an S slide spacing connecting piece, an S slide connector 1, a slide connector 2, a slide connector 3, a slide connector 4, a slide connector 5, an S leg drive connecting piece, an S front supporting piece, an S rear supporting piece, an S auxiliary mounting piece, an S mounting side plate, an S seat frame mounting plate, a backrest push piece, an S back spacing piece, a fixed connecting piece, an S back connecting piece, an S back connector, an S stay rope drive connecting piece, an S stay rope fixed connecting piece, an S square tube connecting piece and a flange fixing piece. The quantity of the selectable leg structures is two, and the two leg structures respectively adopt 8 parts and 6 parts, and can respectively cooperate with other parts to form the complete apparatus. The composition, connecting points, spacing and connecting rod drive of the parts are designed, and bearings are used for rotating connection; and the apparatus can comfortably, safely and stably run, and the legs are selectable.

The invention discloses a method and device for keeping audio and video synchronization by using the speed conversion algorithm. The method includes the steps of judging the relation between audio time stamps and system time stamps, collecting audio data again, increasing or decreasing the audio data, and quickening or slowing down audio play. Therefore, synchronization of audio and video play can be achieved. The method and device are easy to implement and strong in practicality, effectively solve the problem of asynchronization in the audio and video play process, do not need to discard non-synchronous audio and video data, effectively improve the continuity and integrity of videos, and meet user needs.

The invention relates to a video playing method, device and equipment and a storage medium, and the method comprises the steps: obtaining a to-be-played resource in response to a video playing instruction, and storing the to-be-played resource in a first cache queue; determining a currently read image frame as a target image frame from the first cache queue; storing the target image frame into a second cache queue, and decoding the target image frame; when the decoding of the target image frame fails, inserting each image frame in the second cache queue into the head of the first cache queue;obtaining corresponding target audio data; repeating the operations of image frame caching and image frame decoding until the target image frame is decoded successfully; and displaying the successfully decoded image and playing the target audio data. According to the invention, the phenomenon of picture and sound asynchronization caused by decoding failure in the video playing process is avoided,and the picture display speed is accelerated.

The invention relates to a method for starting a permanent magnetic synchronous motor without a position sensor. A method for conducting closed-loop control on a stator flux linkage is used for achieving open-loop control starting of the permanent magnetic synchronous motor. The steps of conducting closed-loop control on the stator flux linkage is that the output voltage Us of a stator is calculated and obtained at last based on an estimated stator flux linkage increment delta psi, detected resistance Rs and a stator current is. When open-loop control starting of the permanent magnetic synchronous motor is conducted, the largest output torque is not affected by loads, and the phenomenon of step falling out of the motor is effectively avoided.

The invention provides a vehicle autonomous navigation method based on image matching / inertial navigation / odometer. An unmanned aerial vehicle equipped with a ground shooting camera is arranged on a ground vehicle needing to be positioned; a vehicle-mounted inertial navigation / odometer integrated navigation system is started, and whether the unmanned aerial vehicle has a take-off condition or notis judged by a driver under a motion condition of the vehicle; if the UAV has the take-off condition, the UAV takes off autonomously and tracks the vehicle autonomously, photographs the ground and realizes positioning of the ground vehicle by matching the photographed real-time image with a reference image made in advance; a positioning result is obtained and then sent to the vehicle navigation computer for data fusion; and after a vehicle positioning result is obtained, the unmanned aerial vehicle autonomously lands and returns to the vehicle. The invention provides a new navigation scheme, an unmanned aerial vehicle is used for carrying an aerial camera, template matching is carried out on a real-time aerial image and a reference image library, so that geographic coordinates of a vehiclein the real-time aerial image are determined, and an integrated navigation error of an inertial navigation / odometer is corrected according to a matching positioning result.

The invention provides a magnetic path horizontal rotary type hoisting permanent magnet. The magnetic path horizontal rotary type hoisting permanent magnet is mainly composed of three parts, namely a mechanical rotation part, a magnetic system body and a control device, and is characterized in that a lifting ring of the mechanical rotation part is arranged on a lifting rod with a hook; when the lifting rod with the hook slides in a lifting rod slide rail, left and right lifting bars and large bevel gears are driven to rotate, then small bevel gears are driven to horizontally rotate, and finally, a plurality of rotary magnetic shafts in the magnetic system body are driven to rotate by a roller chain so as to change a magnetic path; and each lifting or descending of the lifting rod with the hook is used for controlling the unhooking or the hooking of the hook, so that the rotary angles of the magnetic shafts in the magnetic system body are controlled to control the circulation of two states, namely iron suction and iron releasing, of the hoisting permanent magnet; and a ratchet wheel is not used so that the problems of an old type hoisting permanent magnet that the iron suction is not synchronous, the machining is difficult and the like are completely overcome.

The invention discloses a frame synchronization method of image data and a camera. The method of the present invention comprises: acquiring a color image data stream and a depth image data stream transmitted by different signal channels; wherein a color image frame in the color image data stream and a depth image frame in the depth image data stream comprise synchronous frames which are synchronously output after exposure of a color camera and a depth camera; wherein the transmission delays of the different signal channels are different, and the data volume structures of the color image frameand the depth image frame carry timestamps and exposure time; obtaining the SOF time of the color image frame and the SOF time of the depth image frame respectively according to the timestamp and theexposure time; and acquiring a synchronous frame image from the color image data stream and the depth image data stream according to the SOF time. According to the invention, image data asynchronization caused by transmission delay can be avoided, and it is ensured that an upper layer obtains a synchronous color image and a depth image.

The invention relates to the field of instant food, in particular to an instant two-layer food forming method. The instant two-layer food forming method comprises the following steps: 1) pressing a wrapper and cutting the wrapper into a plurality of slender flour tapes; 2) conveying uncooked or cooked stuffing to the position of the flour tapes; 3) feeding the stuffing to one side of the flour tapes, wherein an angle formed between the stuffing conveying path and the plane of the flour tapes is 45-135 degrees when the stuffing is fed to the flour tapes; 4) firstly pushing the other side of the flour tapes into forming holes of an outer forming template and an inner forming template, wherein the middle portions of the flour tapes wrap the stuffing at the moment to realize preliminary forming; 5) sealing the portions, which wrap the stuffing, of the flour tapes and simultaneously performing pattern printing forming to the flour tapes with sealed portions; 6) placing the formed instant two-layer food on a conveying belt for conveying. By improving the included angle between the stuffing and the flour tapes when the stuffing is filled into the flour tapes, the situation that the stuffing cannot be put in the flour tapes is avoided, the contact surface between the stuffing and the flour tapes is larger, the integrity of the stuffing is better, the stress surface of the flour tapes is larger and the flour tapes are prevented from being damaged.

The invention relates to a data synchronization method between base stations, a data synchronization device therebetween, and a data synchronization system therebetween, wherein the data synchronization method between the base station comprises that: a plurality of base stations receive transmitting time tables and transmitting channel labels of data; the base stations checks the correctness of the data, and stores the data and the transmitting time tables and the transmitting channel labels of the data, according to the checking result; the base stations transmit the data to the user apparatus according to the transmitting time tables and the transmitting channel labels. The data synchronization device between the base stations comprises a first module, a second module and a third module connected in turn. The data synchronization system between the base stations comprises a content server and a device for realizing the data synchronization between the base stations. The invention has the function of error correction and retransmission, thereby effectively solving the problem of data asynchronous of relative base stations, advancing the receiving performance of the users.

The invention discloses a separately-excited synchronous motor magnetic flux orientation method, which comprises the following steps of: performing 3 / 2 coordinate transformation on three phases of armature windings produced in the armature winding of a stator to obtain an alpha-axis electromotive force and a beta-axis electromotive force to acquire an initial rotor position angle; computing the tangent of a difference between a supposed actual rotor position angle and the initial rotor position angle; integrating the computed tangent, taking absolute values of a path of integrated signals, multiplying the absolute values by a certain coefficient, judging the variation trend of the other path of integrated signals, and performing pulse conversion processing on the two paths of processed integrated signals; performing proportional integral control operation on the computed tangent; correcting the signals subjected to the pulse conversion processing by using the signals subjected to the control operation to obtain initial rotor position correction signals; integrating pulse signals in the rotating process of a rotor; and adding the initial rotor position correction signals and the pulse integrated signals to obtain an actual rotor position angle to perform magnetic flux orientation vector control on the motor. The method has the advantage of realizing the low cost and low failurerate of magnetic flux orientation.

The invention discloses an automatic grain sampler. The automatic grain sampler comprises a longitudinal traveling cart which is arranged on longitudinal traveling tracks, two transverse traveling trolleys which are arranged on transverse traveling tracks of the longitudinal traveling cart, and fiche chain transmission lifting mechanisms which are arranged on the transverse traveling trolleys. The automatic grain sampler is characterized in that: a longitudinal traveling cart reducing motor drives a driving shaft of the cart by a chain wheel, and traveling wheels of the cart which are positioned at both ends of the driving shaft and a driven shaft of the cart are arranged on the longitudinal traveling tracks; the two transverse traveling trolleys have the same structure, a driving sprocket of a transverse traveling reducing motor shaft of one trolley is connected with a driven sprocket of a transverse traveling reducing motor shaft of the other trolley through a trolley chain, and moving rollers of the trolleys are arranged on the transverse traveling tracks; and driving sprockets of fiche lifting reducing motor shafts of the fiche chain transmission lifting mechanisms are connected with driven sprockets of sprocket adjustment shafts of the trolleys through fiche chains, and the fiche chains are fixedly connected with fiches. The automatic grain sampler has the advantages of simple structure, high manufacturing and assembly processability, low cost, high performance-price ratio and the like, and can be operated stably.

The invention discloses a method for synchronously displaying signals in batch on a spliced wall. A FPGA (Field Programmable Gate Array) logic processing unit on the spliced wall is equipped with two levels of registers, namely a temporary register and an effective control register, wherein the effective control register is used for storing the configuration parameter of the current batch of signals, and the temporary register is used for storing the configuration parameter of the next batch of signals. Before signal switching, the data of the signals to be displayed is prestored in the temporary register, and after the prestoring operation, the data in the temporary register is latched to the effective control register through a synchronous control register so that the FPGA logic processing unit of the spliced wall perform the processing and display operations according to the data in the effective control register. By adoption of the prestoring mode, the time that the effective control register obtains data is greatly saved, the phenomenon of asynchronous image display in different signal windows is avoided, and the user experience is improved.

The invention discloses a method and a network system for synchronously recovering a multimedia broadcast multicast service (MBMS), which are used for solving the problem that correct synchronous recovery cannot be performed after packets are lost in the prior art. The method comprises the following steps that: a lower-layer network element of which a service packet is lost sends a request message for acquiring the information of the lost service packet to adjacent lower-layer network elements; the adjacent lower-layer network elements feed back the information of the lost service packet to the lower-layer network element of which the service packet is lost; and further, the lower-layer network element of which the service packet is lost performs synchronous recovery according to the acquired information of the lost service packet. By the method, the lower-layer network element of which the packet is lost continuously is synchronously recovered by synchronous information acquired from one or a plurality of adjacent lower-layer network elements in a group of network elements for realizing MBMS synchronous transmission to prevent the lower-layer network element from desynchronizing for a long time, so the robustness and efficiency of MBMS service synchronization are improved greatly.

The invention provides a spline groove type flow rate adjusting damping cylinder for an intelligent knee joint. The spline groove type flow rate adjusting damping cylinder comprises a cylinder part, apiston assembly, a spring assembly and a flow rate adjusting assembly, wherein the cylinder part is provided with a cylinder body, a steel coat and a cylinder cover; the cylinder body is provided with two parallel hydraulic oil passages; the steel coat is fixedly arranged in the cylinder body by a sealing ring, and the cylinder cover is fixedly arranged at the upper end of the cylinder body through threads; the piston assembly is arranged in the cylinder body, and is provided with a piston rod and a piston, and the piston is sheathed on the piston rod through threads; the spring assembly is provided with a spring push block, an extending-assisting spring and a spring casing, the spring push block is fixedly connected with the lower end of the piston rod, the extending-assisting spring isarranged under the spring push block, and the spring casing is connected with the bottom end of the cylinder body and is used for accommodating the extending-assisting spring; the flow rate adjustingassembly is provided with an adjusting seat, an axial adjusting valve body, a stopper and a stepping motor, the adjusting seat is fixedly connected with the cylinder body, the upper part of the adjusting seat is provided with a cylindrical groove opening, the axial adjusting valve body is arranged on the adjusting seat through the cylindrical groove opening, the stopper is arranged on the adjusting seat and is used for fixing the axial adjusting valve body, the stepping motor is fixedly arranged at the bottom part of the adjusting seat, and the stepping motor is connected with the axial adjusting valve body.

The embodiment of the invention discloses a data processing method, device and system. The method comprises the following steps that: a controller receives a synchronous request message, wherein the synchronous request message is a message for a switch to request for synchronization of a first flow table entry on the controller onto the switch, and the first flow table entry is a flow table entry transmitted by the controller to the switch before the reception of the synchronous request message; the controller acquires the first flow table entry according to the synchronous request message; and the controller transmits the first flow table entry to the switch. Through adoption of the method and the system, flow table entry synchronization between the controller and the switch can be realized; the phenomenon of asynchronization of flow table entries between the controller and the switch due to the loss of the flow table entries in the switch is avoided; an automatic error correction function in a data transmission process is added; and the security of network equipment information interaction is enhanced.

The invention discloses a system and a method for uniformly saving media information. The system includes a management unit, an information module, a saving module and a conversion module. The management unit is connected with each of the modules for controlling the operation flow; the information module is used for receiving and sending information; the saving module is used for saving a message and an attachment thereof in a preset format; the conversion module is used for mutually converting the information and the message. The information includes at least emails, audio files, fax files, short messages or one of multimedia short messages. By saving all the mails and information of the user uniformly in a memory in the same format, problems such as a synchronization and complex system structure caused by saving the information separately are avoided; the user feels flexible during visiting the information or mails; the media information in various types inside the mailbox are visited and managed with any communications tool.

The invention relates to a positioning system and positioning method of a global navigation satellite system (GNSS) monitoring station. A GNSS reference station is connected with the GNSS monitoring station by a communication link. The positioning method comprises the steps of receiving a first satellite carrier signal of each satellite in a plurality of satellites; determining first ephemeris data and first observation data according to the first satellite carrier signal, determining a first satellite position of each satellite according to the first ephemeris data, and determining a first carrier phase observation value corresponding to the first satellite position according to the first observation data; receiving ephemeris time of each satellite and a differential correction parametercorresponding to the ephemeris in real time by the communication link; and determining a position coordinate of the GNSS monitoring station according to the positions of all first satellites, all first carrier phase observation values and all co-observation satellite correction values. According to the positioning system and the positioning method of the GNSS monitoring station, provided by the invention, the problem that monitoring satellites of the GNSS monitoring station and the GNSS reference station are not synchronous can be solved, and the positioning accuracy of the GNSS monitoring station is improved.

The invention relates to a user terminal incoming call processing method. The method comprises the following steps: after an application management thread receives an incoming call message, the application management thread starts a call application and draws an incoming call window; at the initial phase of incoming call window drawing, the application management thread sends a playing request to a ring tone playing preparing thread; after the ring tone playing preparing thread receives the playing request, the ring tone playing preparing thread prepares resources needed by ring tone playing; and after the ring tone playing preparing thread is ready, the ring tone playing preparing thread notifies a ring tone playing thread to call multimedia software and to play a ring tone. The invention further relates to a user terminal incoming call processing device. According to the application of the technical scheme provided by the invention, the method of starting an idle thread is employed to play the ring tone of the incoming call, the phenomenon that ring tone playing and incoming call interface drawing are not synchronous is avoided, wherein the phenomenon is brought by that ring tone playing and incoming call interface drawing are performed in the same thread, and the experience of a user is improved.

The invention relates to an evaluation method for detecting and evaluating the power system stablizer (PSS) inhibition power grid low-frequency oscillation effect for PSS commissioning effect after a power grid is detected to have low-frequency oscillation. The evaluation method comprises: firstly, calculating the phase difference of the active power of a generator and a PSS output signal; then setting a PSS phase compensation effective range, and judging a dead zone; and finally, evaluating the PSS inhibition power grid low-frequency oscillation effect. The invention has the beneficial effects of evaluating the PSS inhibition power grid low-frequency oscillation effect on line, adjusting the PSS parameters in time, effectively inhibiting the power grid oscillation after regional grids are interconnected and ensuring safe and stable operation of the power grid.