11 results about "Synchronous frame" patented technology

The invention provides an energy storage equipment phase synchronization control method and an energy storage system, relates to the technical field of energy storage equipment, and aims to solve the problem of phase tracking lag of slave machines caused by communication link delay when multiple machines are connected in parallel. The energy storage device phase synchronization control method comprises the steps that a first synchronization frame is received from a first energy storage device, and the first synchronization frame comprises a first voltage phase; a second synchronization frame is received from the first energy storage device, the second synchronization frame comprises a first time difference, and the first time difference is the difference value between the sending completion time and the sending start time of the first synchronization frame; calculating a second time difference based on a first reception time of the first synchronization frame and a second reception time of the second synchronization frame; and performing phase synchronization based on the first voltage phase, the first time difference and the second time difference. According to the phase synchronization control method, the communication processing total delay of the whole link is actively calculated, then the real-time phase of the host at the current moment is dynamically predicted, and finally accurate synchronization without lag errors is achieved.

The invention discloses a time synchronization method and device and electronic equipment, relates to the technical field of data processing, and is used for realizing time synchronization of data acquired by different sensors. The method comprises the following steps: firstly, acquiring frame data acquired by N sensors respectively to form a cache data set; the method comprises the steps of determining a second timestamp according to a first timestamp corresponding to each piece of frame data, obtaining a synchronization timestamp interval based on the second timestamp and a preset synchronization timestamp threshold value, and then determining a synchronization frame data set based on the synchronization timestamp interval and a cache data set. Through the method, time synchronization can be carried out on the data processed by different sensors, it is ensured that the timestamp difference between the synchronization frame data is within a small threshold range, time synchronization does not need to be carried out on the frame data of all the sensors at the same time, and the method can be suitable for a large-scale distributed sensor architecture.

The high-precision and high-speed synchronous shearing device comprises a base, a shearing table, a synchronous frame, a guide frame, a meter counting mechanism, a driving mechanism, a synchronous sliding rail, a shearing mechanism, a reset mechanism and a controller, the synchronous frame is arranged on one side of the synchronous sliding rail in parallel, two belt wheels are arranged on the synchronous frame, and a synchronous belt is wound between the two belt wheels; the shearing mechanism comprises a sliding block, the sliding block is arranged on the synchronous sliding rail in a sliding mode, a shearing support and a clamping support are arranged on the sliding block, a shearing assembly is arranged on the shearing support, the clamping support is located on the side, close to the synchronous frame, of the sliding block, and a clamping assembly used for clamping the synchronous belt is arranged on the clamping support. According to the high-precision high-speed synchronous shearing device, the synchronous belt moving synchronously is arranged on one side of the sliding rail, the synchronous belt is clamped through the clamping assembly, synchronous movement of the shearing assembly and the to-be-sheared piece is achieved, and damage to the to-be-sheared piece is avoided.

The invention discloses a low-voltage carrier multi-configuration network time synchronization collaboration method, which is characterized in that network nodes are divided into a plurality of logic communication groups, and a periodic synchronization reference frame and a time slot distribution mechanism are adopted, so that intra-group high-precision synchronization and cross-group seamless forwarding are realized; by adopting the method, the synchronization precision is remarkably improved, and the reference node periodically broadcasts the synchronization frame and compensates the transmission delay, so that the clock skew of each node is reduced to be below millisecond level; flexible configuration and rapid reconstruction capability are realized, dynamic increase and decrease of nodes and real-time update of configuration are supported, manual intervention is not needed, and configuration switching time delay is less than 20 milliseconds; communication is high in reliability, time slot isolation reduces inter-group conflicts, and a cross-group forwarding mechanism ensures that the data transmission success rate is high; the compatibility is strong, the deployment is easy, only a synchronization frame and time slot mapping need to be added in an existing PLC link layer protocol, and primary equipment of a power grid does not need to be changed; the operation and maintenance cost is reduced, and the operation efficiency and stability of the power distribution network communication system are improved.

The invention discloses an inverter phase synchronization method based on a CAN bus and zero-crossing phase locking. According to the method, the existing CAN bus communication link of the parallel operation system is multiplexed, and the phase synchronization of the master and slave machines is realized by combining the zero-crossing phase locking technology. And the host triggers and sends a synchronization frame containing an equipment identifier, a zero-crossing time stamp and a power frequency period at the zero-crossing time of the inverter output voltage, the slave receives the synchronization frame, eliminates transmission deviation through hardware delay compensation, and dynamically adjusts the step length according to the phase error until the phase error in a plurality of continuous power frequency periods is at a preset threshold value, so that phase locking is completed and stability is maintained. And meanwhile, a dual-host redundancy design can be adopted, and synchronous interruption caused by a single-host fault is avoided through initial phase calibration, secondary calibration in operation and an automatic fault switching mechanism. An independent IO port does not need to be additionally configured, the synchronization precision is high, and operation is stable.

The utility model relates to a kind of block forming machine demolding synchronous devices, including synchronous gear, synchronous frame and two parallelly arranged synchronous shafts, both ends of each the synchronous shaft are equipped with synchronous gear, and the same side end of two synchronous shafts is connected by synchronous frame, the synchronous frame includes adjusting frame, connecting rod, demolding ejector rod and two parallelly arranged racks, the tooth surface of two racks is oppositely arranged, and two racks are respectively engaged with the synchronous gear on corresponding synchronous shaft, the connecting rod is connected in the lower end of two racks, the demolding ejector rod is connected in the upper end of two racks, the position of the rack on connecting rod and demolding ejector rod is adjustable, and the both ends of adjusting frame are equipped with adjusting bolt in pairs, and the adjusting bolt of the both ends of adjusting frame is respectively abutted on the outside of two racks. The block forming machine demolding synchronous device of the utility model can ensure the engagement of rack and gear by adjusting.

In a 802.11be multi-AP collaboration, collaborated BSSs obtaining shared resource from a collaborator AP. Co-channel interferences arise from misalignment of PHY preambles between the various collaborated and collaborator BSSs. This misalignment results from the independency of each BSSs during the shared TXOP. To overcome this deficient situation, a synchronization frame is sent by the collaborator AP at a predefined sync time over the shared frequency bands, even if the collaborator AP does not belong to the BSSs operating on these bands. The predefined sync time may derive from the UL Length field specified in the initial trigger frame. Consequently, all the stations are ready to receive the synchronization frame and therefore to start again their MU or P2P transmission a SIFS after the synchronization frame. PHY preambles in adjacent channels are therefore fully aligned.

The present invention relates to a timestamp-free synchronization clock parameter tracking method based on extended Kalman filter, and belongs to the technical field of wireless sensor networks. With a first order Gauss Markov model and a clock model as a state equation, evolution processes of clock skew and instantaneous clock offset is described. Then an observation equation constituted by observation models of timestamp-free synchronization and instantaneous clock offset is established, and clock skew and instantaneous clock offset are jointly tracked by a tracking method based on extended Kalman filter to realize synchronization between a node to be synchronized and a reference clock node. The method can track two time-varying parameters simultaneously by following a network data flow without needing a dedicated synchronization frame to exchange synchronization information, which reduces energy consumption and improves synchronization precision.

A timing synchronization function (TSF) synchronization method includes: generating a first TSF information frame, where the first TSF information frame includes first TSF synchronization data, and the first TSF synchronization data includes TSF information of a first access point (AP) of a multi-access point (multi-AP, MAP) system, and generating a second TSF information frame, where the first TSF information frame includes first TSF synchronization data, and the first TSF synchronization data includes TSF information of the first access point (AP) of the multi-AP, MAP system. And transmitting the first TSF synchronization frame to a second AP of the MAP system.

The invention relates to the technical field of remote desktop operation and maintenance and video auditing, in particular to a non-operation frame skipping method, system and device for operation and maintenance auditing video and a medium. The method comprises the steps that an operation and maintenance auditing file is analyzed, synchronization commands in the file are recognized, and a non-operation frame sequence mapping table is generated based on the continuous synchronization commands, the mapping table records the number of each synchronization command and subsequent continuous synchronization commands; when the operation and maintenance audit file is played back, analysis is carried out according to the non-operation frame sequence mapping table, when a synchronization command is encountered, the number of continuous synchronization commands corresponding to the synchronization command is inquired, if the number is larger than zero, the subsequent corresponding number of synchronization commands are skipped, a key synchronization frame where a next non-continuous synchronization command is located is directly located, and the operation and maintenance audit file is played back. And continuing playback rendering from the key synchronization frame, thereby realizing skipping of a non-operation frame. The computing resources and the GPU rendering load of the browser client in the playback process are reduced, and the playback fluency is improved.

A synchronous framing data acquisition and processing system based on a TTE bus comprises a data integration device, a network switch and a plurality of data acquisition devices. According to the transmission data volume of the TTE bus single virtual link, the communication period Ti of the data acquisition equipment is configured; virtual link planning is carried out according to the full frame number L of the telemetry data, and TT frame data is split into a plurality of small frame data; and transmitting the TT frame data split into a plurality of small frame data to the data comprehensive equipment through the network switch according to the communication period Ti, thereby completing the transmission of all the TT frame data in the cluster period T. According to the invention, super-large-scale, high-capacity, high-real-time and high-reliability telemetry data comprehensive framing based on the TTE bus can be realized.