887 results about "Clock synchronisation" patented technology

The invention discloses an electronic lead seal automatic detection method applied to logistics tracking, and relates to the technical field of Internet of Things safety monitoring. The problems of packaging data loss, tampering risk increase and real-time monitoring failure caused by wireless communication signal interference, transmission delay and state updating lag of an existing electronic lead seal are solved. The method comprises the following steps: fusing multi-physical field sensing data through a space-time correlation sampling algorithm, and constructing an anti-interference characteristic matrix; evaluating communication quality based on the dynamic probability network model, and triggering a multi-path fragmentation concurrent transmission strategy to avoid signal attenuation; a hybrid reasoning model is deployed at an edge end to screen key event data, and the transmission efficiency is optimized in combination with differential coding and an IEEE 1588 clock synchronization mechanism; the cloud end adopts a space-time diagram fusion analysis model to carry out cross-modal abnormal association scoring, corrects misjudgment and updates an edge model; according to the invention, the communication reliability, the real-time transmission efficiency and the anomaly detection precision of the lead sealing state data in a complex environment are obviously improved.

The invention provides an HPLC (High Performance Liquid Chromatography) station area cooperative communication method based on clock synchronization, which comprises the following steps: step 1, multi-dimensional data acquisition and broadcasting: each concentrator periodically acquires clock precision, stability and reliability data, and sends a beacon frame containing a timestamp and a health degree score through a power line carrier broadcasting channel; step 2, dynamically calculating the index distinction degree by using an entropy weight method, adaptively allocating weights, and electing an optimal main CCO in real time; step 3, dual-mode PID cooperative control: the main CCO adopts a dual-mode switching strategy of a dynamic PID algorithm and a chaotic fractional order PID algorithm; 4, monitoring a synchronization state in real time by constructing a clock check network, and optimizing a fault isolation strategy in combination with weighted scoring to realize that the state switching time of the master node and the slave node is less than or equal to 50ms; cooperative communication is realized on the basis of completing synchronization of the concentrators CCO in the whole network. Redundant message transmission is reduced through a dynamic parameter resynchronization mechanism, and the utilization rate of network resources is optimized.

The invention discloses a cloud mobile phone end-to-end performance tracking method and related equipment, and relates to the technical field of cloud computing, and the method comprises the steps: obtaining client touch event data and network event data, and generating a global unique identifier based on a preset Hash algorithm; obtaining server resource event data; performing timestamp calibration on the client touch event data and the server resource event data based on a hardware-level clock synchronization and software compensation algorithm to generate a synchronous timestamp; based on the synchronization timestamp, aligning the event sequences of the client and the server through a dynamic time warping algorithm to generate an aligned event sequence; performing causal probability calculation on the aligned event sequence based on a Bayesian network model, and determining a causal relationship weight between resource events; and performing root cause matching according to the causal relationship weight and a preset abnormal mode library, generating a root cause list with priority ranking, and triggering execution of a self-healing strategy.

The present invention discloses a method, device, equipment, medium and product for clock synchronization between clusters. The method is applied to a slave clock synchronization system in each cluster, and the slave clock synchronization system includes: a clock synchronization module and a calculation module; the clock synchronization module obtains the timestamp of the high-precision time synchronization protocol PTP message between the master clock server and the master clock server, and sends the timestamp to the calculation module; wherein the PTP message includes at least: a synchronization message, a follow-up message, a delay request message and a delay response message; the calculation module determines the corresponding master-slave clock deviation and transmission delay according to the received timestamp, and sends the clock synchronization signal determined according to the master-slave clock deviation, transmission delay and the local slave clock to the clock synchronization module; the clock synchronization module generates the corresponding slave clock second pulse according to the clock synchronization signal sent by the calculation module to complete the slave clock correction. This scheme can realize accurate clock synchronization between computing clusters in a multi-computing cluster system.

The invention discloses an electronic lead seal data management method based on a block chain, relates to the technical field of internet data services, and aims to solve the problems of node data asynchronization, state updating failure and potential safety hazards of an intelligent contract in the prior art. The data consistency is ensured through a distributed clock synchronization algorithm and a version number verification mechanism; the reliability and fault tolerance of state updating are improved by adopting an improved Byzantine fault-tolerant algorithm and an asynchronous two-stage transaction submission mechanism; data integrity and traceability are guaranteed through a state machine detection mechanism and transaction log records; the security and maintainability of the smart contract are improved based on an automatic code auditing algorithm and a proxy contract mode of a graph neural network; real-time data monitoring and exception repair are realized by using an under-chain auditing mechanism and a cross-chain data consistency verification protocol; according to the invention, the data consistency, the system safety and the reliability of electronic lead seal data management are obviously improved.

The invention discloses a power line carrier communication protocol data link layer simulation method, which comprises the following steps of: constructing a physical layer interface simulation module, simulating power line carrier or wireless air interface transmission through TCP socket communication, and creating a high-priority task process to process time slot-level time sequence synchronization for triggering a physical layer transceiving action at a specified time slot; configuring a time sequence synchronization control mechanism, obtaining a timestamp carried by a beacon frame sent by a concentrator, calling a clock synchronization function to align a site local clock with the timestamp when receiving the head of the beacon frame, adding delay compensation before sending data, and delaying and starting a physical layer receiving action to offset IP network transmission delay when receiving the data; a data frame processing flow is realized, a header callback function is controlled through a registration frame to respond to a physical layer state change, TCP message data is cached by using an annular queue, and a physical layer interface simulation module analyzes a message, distributes a memory and processes a load at a specified time slot after time sequence synchronization.

The invention relates to the field of power equipment data processing, in particular to a multi-target dynamic optimization unit load intelligent distribution method, which adapts a micro-service cluster through a containerization protocol, adopts an OPC UA protocol and an MQTT protocol to respectively collect thermal power and new energy data at different frequencies, dynamically analyzes an IEC 61850 power grid instruction, converts and stores the IEC 61850 power grid instruction into a Kafka message queue, and sends the IEC 61850 power grid instruction to a network server. The problem of communication protocol heterogeneity is solved. Based on an IEEE 1588 protocol, sub-millisecond clock synchronization of edge nodes is realized, a cubic spline interpolation algorithm is adopted to align multi-frequency data, an interpolation window is dynamically adjusted in combination with a genetic algorithm, and a spatial-temporal characteristic matrix is generated and stored in a Redis database. And performing multi-objective optimization solution through an NSGA-II algorithm, and dynamically adjusting the weight of an objective function to adapt to the frequency modulation requirement of the power grid. A closed-loop feedback mechanism corrects model parameters through Kalman filtering, actual data are written back to a feature matrix, the robustness of the system is improved in combination with a hierarchical fault-tolerant strategy, the problem of space-time mismatch of data is effectively solved, and the economical efficiency and safety of load distribution are improved.

The present technology pertains to systems and methods for one-way authentication of quantum channels. A transmitter generates an entangled quantum state comprising a first state and a second state, modulates the second state according to a clock-synchronized pattern, and transmits it through a quantum channel to a receiver. The first state is retained and measured at the transmitter to extract quantum-state information. Authentication is performed based on this information, without requiring feedback from the receiver. The quantum-state information may be derived using quadrature measurements, Gaussian tomography, or other statistical analyses to detect whether the second state underwent irreversible interactions such as eavesdropping or decoherence. The system enables secure unidirectional quantum authentication, reduces protocol complexity, and supports real-time anomaly detection. It is compatible with continuous-variable quantum states, quantum key distribution (QKD), and scalable communication architectures.

The invention discloses a directional broadcast multi-band interference suppression method based on dynamic beam forming, and relates to the technical field of computer processing, and the method comprises the steps: S01, synchronously capturing electromagnetic signals of at least two working bands through a heterogeneous band receiving array synchronized by a hardware-level clock; s02, analyzing space parameters of a target signal and an interference source in the electromagnetic signal in real time; s03, constructing a layered adaptive codebook based on the interference dynamic parameters; s04, fusing the target signal parameter and the interference dynamic parameter by adopting a block matrix acceleration algorithm and an orthogonal decomposition technology, and calculating a beam forming weight; s05, executing operation through the multi-band coprocessor; and S06, establishing an interference source azimuth drift prediction model, and setting a trigger threshold as the coverage tolerance angle theta. According to the method, the anti-interference real-time performance is improved by utilizing layered adaptive wave beams, frequency band isolation, super-resolution multi-path identification and block decomposition.

The invention discloses an acupoint recognition system based on a multi-modal digital twinning technology, which comprises a multi-modal data acquisition module, a multi-modal data transmission module, a multi-modal data processing module, a digital twinning construction module, an acupoint state and positioning prediction network, a result presentation module and a multi-modal data acquisition module integrated high-performance sensor group, a high-precision clock synchronization system is connected, and acupoint and human body data are acquired in all directions by utilizing a space calibration frame; the data transmission module integrates multiple transmission modes and supports flexible switching and cooperation; the data processing module runs in a special customized RISC-V architecture processor and performs preprocessing, conversion, feature extraction, fusion and dimension reduction on the data; the digital twinning construction module constructs an acupoint physiological and pathological state digital twinning model according to the processed data; the acupuncture point state and positioning prediction network module operates an algorithm in the NPU processor, and accurately predicts the state and position of the acupuncture point according to the human body data; and the result display module displays related information on a human-computer interaction interface.

The invention discloses a mold injection molding full-process automation system based on layered cooperative control, which comprises a central control layer, a module scheduling layer and an equipment execution layer, and clock synchronization among the layers is realized through an industrial Ethernet. The central control layer comprises a dynamic scheduling server and a digital twinborn verification module, the module scheduling layer comprises a mold intelligent scheduling module, an injection molding process control module and a product quality closed loop module, and the equipment execution layer comprises a manipulator cooperation unit and a sprue material processing unit. By constructing a three-layer cooperative control architecture of a central control layer, a module scheduling layer and an equipment execution layer and combining a modular hardware carrier and a cross-layer data closed loop, common industrial problems such as cooperative level splitting, mold control marginalization and abnormal response delay are systematically solved; and finally, the comprehensive benefits that the die changing efficiency is remarkably improved, the product reject ratio is greatly reduced, and the energy consumption is obviously reduced are achieved.

The invention discloses a time slot synchronization method of a TDMA (Time Division Multiple Access) wireless communication network. The time slot synchronization method comprises the following steps: S1, nodes maintain time slot synchronization among the nodes by using the following synchronization modes: UTC (Universal Time Coordinated) direct synchronization, UTC indirect synchronization, base station direct synchronization, base station indirect synchronization and mobile node semaphore synchronization; s2, the base station plays related information required by time slot synchronization by using a time slot synchronization broadcast message; s3, any node uses a node information broadcast message to play related information required by time slot synchronization, and the related information comprises node attributes, timing unreliability values and synchronization state information required by a synchronization reference selection process; s4, the base station provides time service, so that the mobile node can determine the deviation between the local time and the base station time; and S5, providing precise time synchronization service by the base station, and maintaining time slot synchronization within an error range given by the system. According to the invention, wireless relay networking communication of mass Internet of Things nodes is realized, and the performance index of clock synchronization between the nodes is improved.

In one embodiment, a method includes synchronizing, by a camera device, a clock of the camera device to a shared clock time and applying, by the camera device, one or more shared camera parameters to a camera of the camera device. The method further includes determining, by the camera device, a position of the camera device relative to at least one of one or more peer camera devices capturing video of a scene in an environment of the camera device; capturing, by the camera of the camera device, a video of the scene in the environment of the camera device; and transmitting, by the camera device, the captured video of the scene to at least one of the one or more peer camera devices to form a composite video of the scene.

The invention discloses a current and voltage signal synchronous correction and output method and system, and relates to the technical field of power system analysis and control. Compared with a previous current and voltage signal correction method, the method solves the problems that traditional multi-channel signal acquisition depends on conventional clock control, and synchronization precision is insufficient; a conventional sampling circuit is weak in anti-interference capability. The problem that an existing scheme lacks efficient error prediction and dynamic optimization capability is solved. Through a multi-channel FPGA clock synchronization and double-differential sampling technology, complete acquisition of high-frequency transient characteristics of voltage and current signals is ensured; a dynamic calibration algorithm and multi-stage composite filtering are combined, so that common-mode interference and non-linear errors are effectively suppressed; and finally, through optical fiber isolation output and intelligent feedback control, signal full-link synchronous correction is realized, the electric energy metering error can be reduced, the fault positioning precision is improved, the characteristics of high precision, strong anti-interference and low energy consumption are realized, and a reliable data reference is provided for intelligent power grid and new energy grid connection.

The invention provides a method and a system for constructing a common financial business system based on artificial intelligence, and relates to the field of financial system construction. Comprising the following steps: converting financial rule data into analog modulation signal feature vectors containing value intensity, risk association degree and aging attenuation rate through a three-dimensional feature conversion module, and executing market behavior capture, rule space positioning and strategy generation operations in combination with a multi-stage state machine; the supervision text is converted into a continuous control signal injection feature generation logic through a dynamic constraint feedback loop, and a closed-loop adjustment mechanism of value gain calibration, risk attenuation compensation and aging synchronous correction is formed; a physical signal cross validation module is adopted to perform dual coupling verification of main channel waveform characteristics and auxiliary channel time sequence characteristics on the strategy; the time sequence deviation of characteristic conversion, state transition and constraint feedback is synchronously coordinated through a reference clock, and it is ensured that the time sequence deviation of the operation rhythm of all modules of the system is lower than a preset tolerance.

The invention discloses a multi-channel transceiving integrated system based on an RFSOC (Radio Frequency System On Chip) and a radio frequency SIP (Session Initiation Protocol). The multi-channel transceiving integrated system comprises an RFSOC system, a multi-channel clock synchronization module, a radio frequency SIP system and a power supply network, the RFSOC system comprises a control sampling module, a storage module and an optical fiber module, the control sampling module comprises a plurality of RFSOC chips, a CPLD (Complex Programmable Logic Device) chip and a main control chip, and the RFSOC chips are used for processing intermediate frequency signals and realizing data interaction with the optical fiber module; the CPLD chip is used for enabling a power supply network; the main control chip is used for performing control coordination among the plurality of RFSOC chips; the storage module is used for realizing program solidification of the RFSOC system; the optical fiber module is used for realizing high-speed transmission of broadband receiving data; the multi-channel clock synchronization module is used for providing a clock reference of the whole system; the radio frequency SIP system comprises a radio frequency SIP module, a Balun network and a local oscillator power division amplification module. The radio frequency SIP module realizes receiving, transmitting and processing of multi-channel radio frequency signals. According to the invention, a multi-channel transmit-receive integrated system with high integration, large bandwidth and miniaturization can be realized.

The invention belongs to the technical field of clock synchronization, and discloses a synchronous clock precision optimization method and device and electronic equipment, and the method comprises the steps: obtaining a first crystal oscillator frequency and environment parameters of a clock source; inputting the environmental parameters into a preset deviation prediction model to obtain a first deviation value output by the deviation prediction model; and performing compensation calibration on the first crystal oscillator frequency according to the first deviation value, and tracking time according to a compensation calibration result. By monitoring and compensating the influence of environmental parameters on the frequency of the crystal oscillator in real time, the precision and stability of the clock are remarkably improved. The dynamic compensation mechanism can adapt to environmental changes, the influence of external factors on clock precision is reduced, meanwhile, the dependence on expensive hardware is reduced, and the development and maintenance cost of the whole system is reduced. In addition, the method is realized through software design, can be easily integrated into an existing clock synchronization system, is simple in maintenance and updating process, and does not need complex hardware replacement or adjustment.

The invention relates to the technical field of voice recognition, in particular to an implementation method and device of a multi-channel voiceprint recognition system, and the implementation method comprises the steps of multi-channel data acquisition and synchronization, signal preprocessing and enhancement, feature extraction and fusion, model training, real-time deployment and adaptive optimization. Compared with the problems that a traditional multichannel voiceprint recognition system depends on a fixed beam forming algorithm and an independent clock synchronization module, the synchronization error is large, manual parameter adjustment is needed for noise suppression, and generalization is poor, hardware-level clock synchronization is achieved through a PTP protocol, and the accuracy of noise suppression is improved. The method combines an end-to-end neural network to automatically learn noise distribution and a sound source space position, dynamically generates a beam forming weight, can improve the voice quality in a complex noise scene without manual intervention, remarkably reduces the interference of a synchronization error on sound source positioning, and enables the precision and stability of far-field voice enhancement to reach a new level.

The invention discloses a control method and device of an audio processing system and a storage medium, and relates to the technical field of audio data processing, and the method comprises the steps: obtaining environment information and device state data collected by a sensor, and inputting the environment information and the device state data into a clock compensation module; the method comprises the following steps: generating a corresponding compensation parameter according to a preset sampling rate, performing a compensation action on an audio clock based on the compensation parameter, determining a source sampling rate corresponding to at least one audio source according to the compensated audio clock, finally detecting the source sampling rate through a sampling rate conversion module, and when the source sampling rate is different from a preset sampling rate, outputting the audio source. And adjusting the source sampling rate based on the preset sampling rate. According to the application, the audio clock is compensated, and the compensated sampling rate is uniformly converted through the sampling rate conversion module, so that clock synchronization among multi-source audio input and sampling rate unification of the multi-source audio input are realized, and the processing efficiency of the audio data is improved.

The invention relates to the technical field of data processing, and discloses a mine production-oriented multi-source data acquisition and edge calculation fusion device, which comprises a clock synchronization access module, a data governance control module, a flow pipeline backpressure module, an AI reasoning optimization module, a rule closed-loop control module, a message safety uplink module and a center training iteration module, according to the method, the problem of difficulty in data fusion of multi-source equipment is solved, and the consistency of heterogeneous data in time and semantic dimensions is ensured; the stability of an edge computing system under a complex working condition is improved, and data loss and processing delay are avoided; collaborative decision-making of the AI model and the rule engine is realized, and the risk of false report and missing report is reduced; the security and reliability of the data transmission process are ensured, and local autonomy when the network is abnormal is supported; a model automatic iteration mechanism is established, and the ability of the system to adapt to different working conditions is improved.

The invention discloses a video time synchronization processing method and system based on a high-precision network timing protocol. According to the method, time frequency traceability is provided for an internal taming clock module and a clock synchronization module of a processing host through second pulse signals; the internal taming clock module selects to execute a clock taming operation or switch to a self-travel time mode according to whether the external time reference exists or not; according to the time synchronization detection result of the video synchronization processing module, if it is judged that the time synchronization difference between different cameras exceeds a preset range, hardware trigger signals are sent to the cameras through an external trigger generation module, so that camera parameters are adjusted, and key frames are generated; and the video synchronous processing module identifies key frames generated by the multiple cameras by adopting an image definition evaluation method, and completes time axis alignment of the video streams of the multiple cameras based on the key frames. According to the invention, the problem of low synchronization precision or accumulative error and network jitter in the prior art is solved; the time delay after the software is aligned is high, and the camera and the processing host lack feedback linkage.

The invention provides a method and system for realizing synchronous playing of Bluetooth headset devices, and the method comprises the steps: building a synchronous node group comprising a plurality of Bluetooth headset devices, and determining at least two auxiliary nodes; constructing a multi-source clock synchronization network between the main control equipment and each earphone, broadcasting a reference timestamp and activating a direct connection channel between the earphones to form distributed clock correction; acquiring transmission delay and processing capability parameters of each earphone, and allocating a unique time synchronization identifier according to the transmission delay and the processing capability parameters; the main control equipment sends a data packet containing the audio data and a preset playing timestamp; and after each earphone receives the audio data, calculating a playing moment according to the timestamp and the identifier, and synchronously playing the audio data at the moment. Through the scheme of the invention, high-precision audio synchronous playing between Bluetooth headset devices can be realized, the problem of audio asynchronization caused by transmission delay difference is effectively eliminated, and the single-point failure risk under the master-slave topology is reduced.

The embodiment of the invention provides a clock synchronization method and device, a computer readable medium and electronic equipment. The clock synchronization method comprises the following steps: acquiring network state information of target equipment, wherein the target equipment is equipment needing to be subjected to clock synchronization with a clock synchronization server; if the network transmission quality between a clock synchronization server and target equipment is determined to be greater than or equal to a set threshold value according to the network state information, entering a clock adjustment stage, and correcting clock information of the target equipment in the clock adjustment stage; and if the clock skew between the target device and the clock synchronization server is adjusted to a set range, entering a clock holding stage, and determining whether to switch to the clock adjustment stage according to the network state information in the clock holding stage. According to the technical scheme of the embodiment of the invention, clock synchronization processing can be performed based on the network state information of the equipment, and the clock synchronization precision can be improved.

The invention discloses an on-chip optical interconnection and switching chip and an application system thereof. Wherein the on-chip optical interconnection and exchange chip is integrated by a power divider, a bidirectional optical transceiver unit and an optical switch unit; the application system of the on-chip optical interconnection and switching chip comprises a multi-wavelength light source used for generating multi-wavelength optical carrier signals, a transceiving unit control and clock module used for bidirectional transceiving unit feedback / amplifier control and clock synchronization, and an optical switching control module used for switching an optical switching unit switching link. The chips and the modules are used for realizing optical interconnection and optical switching of the special electrical computing chip ASIC. According to the invention, bidirectional optical interconnection and exchange of special computing electric chips such as a CPU, a GPU, a DPU and the like can be realized by utilizing an on-chip optical interconnection and exchange technology, the interconnection rate is high, the exchange switching time is short, computing power cluster networking oriented to artificial intelligence application can be supported, and the application prospect is good.

The invention relates to a clock synchronization system and method based on dual-mode communication, the system is a tree network and comprises a network main node CCO, a proxy node PCO and a child node STA device, the dual-mode communication is high-speed carrier and high-speed wireless, a time synchronization sub-layer is added in a data link layer, and the time synchronization sub-layer is used for synchronizing the data link layer. The frame structure of the time synchronization sub-layer comprises a time synchronization level for representing a clock synchronization priority; time synchronization operation of the system is carried out in a high-speed carrier channel and a high-speed wireless channel at the same time, transmitted time synchronization signals comprise time synchronization priority signals containing time synchronization levels, and synchronization of PCO and STA clocks and CCO clocks in the same low-voltage transformer area dual-mode communication network is achieved based on the time synchronization priority signals. Compared with the prior art, the method has the advantages of improving the clock synchronization efficiency, precision and robustness and the like.

The invention discloses an unmanned aerial vehicle data link communication system for beyond-visual-range cluster measurement and control, and relates to the field of communication transmission. The system comprises a dynamic topology construction module which constructs a dynamic network topology according to unmanned aerial vehicle node parameters and selects an optimal communication path; the spectrum resource management module is used for optimizing spectrum allocation of multiple frequency bands and dynamically allocating spectrum resources; the relay node selection module is used for selecting an optimal relay node and optimizing the energy consumption and the signal quality of the relay node; the clock synchronization module is used for performing high-precision clock synchronization through clock skew modeling and correcting frequency drift; the channel distribution module is used for dynamically distributing communication channels; and the fault detection module monitors the fault state of the communication link of the unmanned aerial vehicle in real time through a fault monitoring model, and performs anomaly detection. Through dynamic topology construction, intelligent relay node selection and multi-dimensional utility function optimization, the flexibility, stability and resource allocation efficiency of a communication network are effectively improved, and efficient and reliable communication of an unmanned aerial vehicle cluster is ensured.

The invention discloses a cloud mobile phone user information feedback processing method and related equipment, and relates to the technical field of cloud mobile phones, and the method comprises the steps: collecting multi-mode feedback data of a user, and carrying out the time sequence alignment based on a clock synchronization protocol; performing text sentiment analysis, video anomaly detection and interface layout defect identification on the multi-modal data by using a deep learning model, and fusing spatial and temporal features through a multi-source association algorithm to generate a problem feature set; matching a preset rule according to the problem feature set to generate a dynamic improvement strategy; cloud server resource configuration and interactive interface rendering logic are adjusted in real time based on a strategy, and model parameters are continuously optimized in combination with a closed-loop verification mechanism and federal learning. Through multi-modal data fusion and software and hardware collaborative optimization, accurate positioning of user feedback and adaptive improvement of service are realized, and the resource utilization efficiency and the user experience of the cloud mobile phone are effectively improved.

The invention belongs to the field of satellite time service, and relates to a clock synchronous positioning device and method with a safety protection function, and the device comprises a multi-frequency receiver which is used for receiving a first satellite signal and a second satellite signal of different frequency bands; the signal processor is used for performing clock synchronization and determining a first key parameter and a second key parameter; the safety protection processor is used for obtaining a first deception recognition result and a second deception recognition result, and sending a signal source switching instruction when a deception signal is recognized in the first deception recognition result and / or the second deception recognition result; the isolation controller is used for controlling to cut off the connection between the multi-frequency receiver and the abnormal Beidou signal source when receiving the signal source switching instruction, and switching to a standby signal source; and the RTK positioning module is used for generating differential correction data according to the received satellite signal and sending the differential correction data to the target moving station. According to the scheme provided by the invention, the safety and the stability of the clock synchronous positioning process are ensured.

The invention discloses an EtherCAT master station distributed clock synchronization method based on an ARM and an FPGA, and relates to the technical field of industrial control, the method comprises the following steps: S1, using an FPGA chip integrated with the ARM and programmable logic resources to construct an EtherCAT master station distributed clock module, the ARM and the programmable logic resources interacting through an internal AXI interconnection bus; s2, the programmable logic resource obtains an enable signal sent by the ARM end, and if the enable signal is 1, the master station performs topology scanning, delay calculation, clock compensation and dynamic drift compensation operations on the slave station to obtain a delay compensation value and a local clock compensation value of the slave station; s3, after compensation is completed, the state machine of the master station automatically jumps to a synchronous signal generation module, SYNC parameters are obtained from the ARM end, and SYNC signal starting time of the slave station is calculated according to the SYNC parameters; s4, respectively converting the delay compensation value, the local clock compensation value and the starting time of the slave station into message information, sending the message information to the slave station, adding 1 to the address of the slave station, and returning to the step S1 until the distributed clock configuration of all the slave stations is completed; the EtherCAT master station distributed clock synchronization method solves the problem that a synchronization (SYNC) signal generated after a distributed clock algorithm is started is unstable, and shows potential and value in the field of higher-frequency slave station synchronization.

The invention relates to the technical field of clock synchronization, in particular to a clock synchronization method of a master station system based on EtherCAT, which comprises the following steps: when a master station periodically sends time synchronization frames to all slave stations, collecting slave station feedback time data, respectively calculating a clock offset value between master time and slave time, and simultaneously, calculating a clock offset value between the master time and the slave time; constructing a master-slave offset time feature matrix according to the collected multi-periodic data, extracting initial static offset, an offset fluctuation trend and offset collaboration features among multiple slave stations from the constructed master-slave offset time feature matrix, and determining an initial estimation set according to the extracted features; constructing a master-slave offset prediction set based on the initial estimation set, and performing master-slave clock offset adaptive compensation correction based on the determined master-slave offset prediction set; according to the method, the initial offset estimation set is constructed, the offset trend estimation function is introduced, secondary fitting of the offset sequence of each slave station node is achieved, and it is ensured that the prediction precision is remarkably improved through an error comparison mechanism.