16 results about "Slave clock" patented technology

The present techniques relate to voltage droop detection and there is disclosed circuitry for detecting a voltage droop event, the circuitry configured to: receive a clock signal from a clock distribution network; obtain, from a storage, a first predetermined value, a second predetermined value and a predetermined threshold count; obtain one or more measurement values associated with a system voltage; when a first measurement value of the one or more measurement values reaches the first predetermined value, initiate a count of clock cycles until a subsequent measurement value of the one or more measurement values reaches the second predetermined value, the second predetermined value being different from the first predetermined value; and when the count of clock cycles is lower than the predetermined threshold count, cause a control entity to take mitigation action.

The application discloses a kind of multi-modal wearable sensor data fusion-oriented timing synchronization method, system, terminal and storage medium, the method includes: obtaining absolute timestamp as global clock source;Global clock source is as the master clock of precision time protocol, a plurality of wearable sensors are configured as slave clock, through precision time protocol, multiple rounds of message interaction are performed between master clock and slave clock, and the timestamp corresponding to each round of interaction is obtained;According to the corresponding timestamp, the current path delay and the current clock offset are calculated, and according to the preset path delay threshold and clock offset threshold, the current path delay and the current clock offset are iteratively judged, whether the local clock is corrected according to the current clock offset is determined according to the iterative judgment result, until slave clock and global clock source achieve timing synchronization;After achieving time synchronization, the periodic data sampling tasks of a plurality of wearable sensors are phase-aligned.The application significantly improves timing synchronization accuracy.

This application relates to the field of clock correction technology, and provides a clock correction method, apparatus, electronic device, and storage medium. The method receives a first synchronization message sent by a master clock node in the current scheduling cycle. If the first synchronization message indicates that a slave clock node is the time synchronization target, the method records the synchronization message reception time of the first synchronization message. It then sends a delay request message to the master clock node and records the delayed message transmission time of the delay request message. The method receives a response message returned by the master clock node in response to the delay request message, the response message carrying the delayed message reception time of the master clock node. Finally, it receives a second synchronization message sent by the master clock node in the next scheduling cycle, and parses the synchronization message transmission time of the master clock node sending the first synchronization message from the second synchronization message. Based on the four acquired times, it calculates the clock deviation between the slave clock node and the master clock node, and performs time correction on the slave clock node according to the clock deviation.

The application discloses a global clock control and management method and system applied to a fusion device. The method detects comprehensive state information of a logic system in real time, triggers and manages events according to the detection result, ensures the safety of triggered events of a controlled system, can quickly respond and implement safety protection for a measurement and control system which does not need to be put into work. The method can also realize global clock running state monitoring, has functions of event and clock configuration, substation account management, alarm linkage, running log, specified equipment debugging and the like, and supports clock adding and later expansion and the like, and has certain advantages in cost, maintenance and safety convenience.

Various arrangements for performing timing synchronization in a variable link propagation delay environment, such as a non-terrestrial cellular network system, are presented. A master clock system and slave clock system can exchange timing messages. Wireless communication can be used for communication between the slave clock system and the master clock system. A correction factor, which can be based at least in part of ephemeris data, can be calculated. This correction factor can then be used in determining an offset between the master and slave clock systems.

The application discloses a clock calibration method, device, equipment and storage medium. First, a current master-slave time deviation and a slave master time deviation are calculated according to measurement data. The master-slave time deviation contains a forward network delay when a master clock transmits a message to a slave clock. The slave master time deviation contains a reverse network delay when the slave clock transmits a message to the master clock. Then, a first clock calibration quantity is determined according to the master-slave time deviation, the slave master time deviation and a preset asymmetric compensation quantity. The asymmetric compensation quantity is used to compensate for the asymmetric bidirectional network delay between two network nodes where the master and slave clocks are located in the PTP network, so that the accuracy of the first clock calibration quantity is improved. Finally, the slave clock is calibrated according to the determined first clock calibration quantity, the master-slave clock synchronization task is realized, and the time synchronization precision of the PTP network is improved.

The application discloses a cross-domain time synchronization method and a cross-domain time synchronization system. The method is executed by a control plane and comprises the following steps: a cooperative controller acquires a synchronization path query request and determines a time synchronization path between a slave clock and an ancestor clock according to the synchronization path query request; the time synchronization path is issued to a target domain controller; the target domain controller comprises a source TSN domain controller, a target TSN domain controller and a non-TSN forwarding domain controller; the target domain controller performs time synchronization control according to the time synchronization path; the non-TSN forwarding domain controller forwards a time synchronization data stream by using a flow control strategy; the source TSN domain controller and the target TSN domain controller respectively collect timestamp information in respective domains and report the timestamp information to the cooperative controller; the cooperative controller acquires a time error compensation value of the slave clock according to the timestamp information and corrects the slave clock by using the time error compensation value.

The application discloses a high-precision multi-channel data synchronous transmission method of a Bluetooth wireless oscilloscope, and belongs to the technical field of electronic measuring instruments. The method comprises the following steps: S1: based on a precise time protocol, performing master-slave clock synchronization between an acquisition device and a plurality of acquisition channels, and establishing a unified global reference clock; S2: for each signal acquisition channel, detecting an inherent delay, and calculating a dynamic time compensation value of the channel based on the inherent delay and an environmental temperature parameter; S3: according to the global reference clock and the dynamic time compensation values of the channels, controlling all channels to start synchronous sampling, and performing compression and packaging processing on multi-channel data obtained through sampling; and S4: transmitting the data subjected to the packaging processing to a master control terminal through a Bluetooth wireless link, and periodically checking and maintaining the synchronous sampling time sequence of the channels in the transmission process.

This invention discloses a multi-agent cooperative adversarial simulation method based on wide area network (WAN) synchronization. Addressing the problems of low clock synchronization accuracy, proneness to timing errors, high bandwidth consumption, and insufficient fault tolerance in WAN scenarios, existing technologies construct a three-tiered architecture: global simulation control, regional collaborative decision-making, and local simulation inference. It employs a layered master-slave clock synchronization combined with delay compensation to achieve unified clock references across all nodes, establishes a clock-state dual-loop hybrid synchronization control mechanism, and completes cooperative adversarial inference through a distributed architecture that decouples decision-making and inference. Simultaneously, it sets up fault-tolerant synchronization and conflict resolution mechanisms. This invention can achieve high-precision synchronization, high-continuity operation, and high-reliability inference for large-scale cross-regional multi-agent adversarial simulations in complex WAN environments, adapting to the needs of distributed simulation applications in multiple fields.

The application provides a radar clock synchronization method, an electronic device, an electronic equipment and a readable storage medium, and relates to the technical field of laser radars. After an actual master-slave clock deviation of a laser radar relative to a master clock source at a current local time is obtained, the actual master-slave clock deviation is subjected to exponential smoothing filtering processing to obtain a target smoothed master-slave clock deviation, an adaptive PID controller is called based on actual PID parameters of the current local time, a target time synchronization control amount corresponding to the target smoothed master-slave clock deviation is calculated, and then the clock period count value of the local system clock signal of the laser radar is counted and adjusted according to the target time synchronization control amount to adjust the clock frequency of the laser radar, so that the laser radar can be synchronized with the master clock source, thereby effectively improving the radar time synchronization accuracy, meeting the real-time requirements of the radar, and improving the clock synchronization accuracy and the clock synchronization stability.

The application relates to the technical field of medical artificial intelligence, and particularly discloses a heart mechanical efficiency evaluation method based on a strain-blood flow coupling model, which comprises the following steps: synchronously collecting electrocardio, heart sound and photoelectric volume pulse wave signals, adopting master-slave clock synchronization and R wave triggering alignment to realize multi-modal signal timing calibration; extracting myocardial strain rate, stroke volume and systolic energy consumption coefficient based on the calibrated signals, and constructing a strain-blood flow coupling efficiency index; dynamically calibrating the coupling efficiency index through a double-parameter self-calibration mechanism of heart rate drift and heart rate change rate; and finally combining multi-scale feature extraction and a gradient boosting decision tree model to output a heart mechanical efficiency grade and an ischemia risk probability; the application solves the problems of missing dynamic load evaluation, isolated multi-modal parameters and insufficient individual difference adaptability in the prior art, and realizes early myocardial ischemia detection sensitivity and wearable device-level real-time monitoring capability.

The present technology relates to sag detection, and discloses a circuit for detecting a voltage sag event, the circuit configured to: receive a clock signal from a clock distribution network; monitor a measurement associated with a voltage provided to the circuit by a power delivery network; in response to the measurement reaching a first threshold, provide a first sag detection signal to the clock distribution network; cause a control entity to take a first mitigation action in response to the first sag detection signal; in response to the measurement reaching a second threshold different from the first threshold, provide a second sag detection signal to the clock distribution network; and cause the control entity to take a second mitigation action in response to the second sag detection signal.

This invention discloses an algorithm for improving time synchronization accuracy in a master-slave network topology. The algorithm comprises the following steps: S1, establishing a master-slave network topology; S2, exchanging messages to obtain four timestamps and calculating the master-slave clock offset and average link delay, sending an Optimize_Req message to the master clock; S3, selecting the optimal master-slave clock offset from multiple offsets and calculating the asymmetric link delay ratio for each synchronization; S4, if the current link delay is approximately symmetrical, the master-slave clock offset is used to update the slave clock; S5, if the current link delay is asymmetric, the clock offset estimate is obtained using the maximum likelihood estimation algorithm, and an Optimize_Resp message is sent to the slave clock to update it. This invention improves the PTP time synchronization protocol by using the above algorithm, adding two message transmissions. The master clock receives the synchronization results from multiple slave clocks, further performs filtering and optimization, and then sends the updated results to the slave clocks, allowing the slave clocks to adjust themselves.

Disclosed in the present invention is a time synchronization method for network nodes. The method specifically comprises: determining a master node and slave nodes in a network; periodically detecting a frequency offset rate Rf of each slave clock relative to a master clock and a transmission delay Ndelay between the master node and each slave node, and correcting a current timestamp of the slave clock on the basis of a current timestamp of the master clock, thereby realizing synchronization between the slave clock and the master clock. By providing a master clock having high clock precision in a network, the time of a slave clock is periodically calibrated on the basis of the master clock, so that while the clocks of nodes in the network are kept basically synchronized, the cost required to keep the clocks in the network basically synchronized is also relatively low.

The application provides a time synchronization method of a tree type FC network, comprising the following steps: establishing a tree type FC network; each boundary clock device realizes time synchronization with a master clock source through a time synchronization strategy; each slave clock device connected to the same boundary clock device realizes time synchronization with the connected boundary clock device through the time synchronization strategy. Through the delay measurement of FC over PON and the time synchronization primitive exchange mode, all FC storage nodes can keep nanosecond-level time synchronization, and through the carry chain fine time synchronization, the synchronization accuracy of the FC storage nodes can be improved to picosecond level, so that the data write sequence consistency in the distributed storage can be ensured, and the data conflict caused by the time inconsistency can be avoided.