34 results about "Master/slave" patented technology

The invention relates to a multi-terminal offline media synchronous playing method and system in a local area network. The multi-terminal offline media synchronous playing method in the local area network comprises the following steps: performing master-slave election on all terminals, and confirming a master device and a plurality of slave devices; performing clock synchronization on the master device and all the slave devices; packaging the synchronized playing progress of the master device to form a master device broadcast data packet, and sending the master device broadcast data packet to all slave devices; after the slave device analyzes the time delay and play delay, time delay and play delay are calculated respectively, and network time delay and progress errors are obtained; whether the absolute value progress error of the current slave device exceeds an error threshold value or not is judged; if not, the master device continues to broadcast the data packet; and if yes, pre-estimated target frame correction is carried out on the slave device, and playing progress synchronization of the slave device is completed. According to the multi-terminal off-line media synchronous playing method in the local area network, the dependence of the server is effectively reduced, and the playing progress synchronization precision is remarkably improved.

The application discloses a distributed storage index method and system based on multiple hash, and the method is as follows: based on a key-value storage engine, a Master / Slave architecture is adopted to build a distributed storage index system; the Master / Slave architecture comprises one Master node and multiple Slave nodes; according to an access request of a key-value pair, the Master node calls multiple linear hash functions to calculate the key of the key-value pair, and obtains the Slave nodes corresponding to all hash values; the Master node sends corresponding operation requests to the corresponding Slave nodes, including an increase operation, a deletion operation, a modification operation and a search operation; when the Master node detects that the real-time load rate of a certain Slave node exceeds a load critical point triggering node splitting, a node splitting operation is performed. The method utilizes the automatic expansion feature of linear hash, improves the scalability and resource utilization rate; based on multiple hash functions, multiple data backups are realized, data loss is avoided, and the reliability is improved; access and storage are realized by using nodes with low load rates, and load balancing is realized.

The present invention relates to the technical field of software update, and in particular to a software update method for master-slave devices of a low-voltage stacked energy storage system. The specific process is as follows: S1, inserting a segment of data X at the beginning of a firmware file of a master device or each slave device; S2, a superordinate computer being connected to the master device and inputting an update command "update"; S3, the master device storing firmware data in a specific area of an external FLASH chip; S4, the firmware storage area in the external FLASH chip of the master device comprising the data X and the firmware data; S5, determining whether there is an identifier of the master / slave device in the content of the first x bytes; S6, completing the update; S7, receiving all the content from the superordinate computer; S8, when the master device wakes up all the slave devices and completes power-on, all the slave devices completing the update; S9, when the master device detects that the identifier is not the identifier of the master device or the identifier of the slave device, exiting the update. Compared with the prior art, the present invention can avoid the cumbersome operation of repeatedly connecting communication harnesses, and also avoid device crash caused by the input update command not corresponding to the sent firmware.

This application provides a fault detection and handling method for RapidIO switching networks, belonging to the field of embedded computer technology. Specifically, it includes several RapidIO service nodes, a dual-redundant RapidIO system management node, and a RapidIO switch. The RapidIO system management node connects to the RapidIO switch and the RapidIO service nodes through an independent RapidIO system management bus interface. The two RapidIO system management nodes employ a master / slave switching strategy to determine the master node. Master and slave determination is performed upon power-up, and master / slave checks are periodically performed during operation. After determining the RapidIO system management master node, it performs the detection and handling of RapidIO switching network faults. This application's solution effectively prevents the spread and deterioration of RapidIO switching network faults.

The invention provides a method, device and equipment for intelligently detecting gateway memory leak and a medium, and the method comprises the steps: deploying a lightweight AI prediction model at a main gateway, and carrying out the online learning of a memory leak mode and real-time reasoning; the slave gateway collects memory data, preprocesses the memory data, generates a memory change trend vector by adopting a dynamic sliding window, and transmits the memory change trend vector to the master gateway; the main gateway analyzes the memory change trend vector transmitted by the slave device in real time through an AI prediction model, identifies a potential leakage mode of the memory change trend vector, and performs graded early warning on an identification result; constructing a lightweight graph neural network to analyze a memory dependency relationship, evaluating a repair measure influence range, and dynamically selecting an optimal repair strategy for equipment needing to be repaired according to a historical repair effect in combination with a reinforcement learning model; and regularly carrying out data statistics and generating a whole-network visual predictive report. According to the invention, memory leak detection, classified statistics and intelligent alarm of the master / slave gateway can be realized, and the network stability is improved.

In a field bus system, the sub-users (3) each have a sub-connection (33) and a functional connection (34) connected to the sub-connection (33), wherein in each sub-user status information is acquired which indicates whether the functional connection is active or inactive. A telegram output by a master user in the field bus system has at least one data report, wherein the status information of the sub-users (3) addressed in the data report is acquired together with the telegram. Furthermore, a counter field of the data report is changed by the sub-connections (33) of the sub-users (3) which have processed the useful data field in a manner predefined for the data transmission operation performed in each case. The data report is assigned an expected value of the counter field which arises when the useful data field has been processed by the sub-users (3) addressed in accordance with the data transmission operation predetermined in the command field. The master user (2) then determines the expected value of the counter field of the data report on the basis of the status information acquired with the telegram and compares it with the value of the counter field in the data report processed by the sub-users (3) addressed in order to determine a processing error in the data report processed by the sub-users (3) addressed in the event of a deviation.

The invention discloses a highway video cloud monitoring system based on cloud side-end collaboration, which relates to the technical field of highway monitoring, adopts a hierarchical collaboration architecture consisting of a front-end acquisition layer, an edge computing layer and a cloud management layer to form a closed-loop logic link, and consists of an edge node cluster containing a master / slave node structure. Performing preprocessing, intelligent analysis and data screening on the data stream, identifying four types of traffic events and generating event metadata, and supporting cross-node data sharing and continuous event complete data chain construction; the cloud management layer comprises a calculation node, a storage node and a scheduling node, cross-node data association is achieved through data fusion, a traffic behavior model is constructed through deep modeling, decision support information is output, and edge node resource allocation, task distribution and storage strategy management and control are achieved. The data transmission pressure and the storage cost are greatly reduced, the monitoring real-time performance and the data processing accuracy are improved, and the reliability and the expansibility of the system are enhanced.

The invention discloses a half-duplex two-way communication control method and device based on application layer scheduling and a medium, and relates to the technical field of communication, and the method is suitable for a master-slave device system connected through an RS485 and other half-duplex serial communication interfaces, and is especially suitable for a hydrological element measurement probe automatic putting system. According to the invention, by defining a master / slave information role, establishing a priority message queue, setting a master information period sending mechanism and adopting a'following 'sending strategy, a slave end instruction is immediately sent only after receiving a master end effective frame, so that channel conflicts are avoided, and meanwhile, a heartbeat mechanism and an instruction confirmation retransmission mechanism are introduced, so that the transmission efficiency is improved. And the communication stability and integrity are ensured. According to the invention, the hardware structure does not need to be changed, and the reliability and real-time performance of two-way communication of the half-duplex system can be remarkably improved only through software control.

A building management system (BMS) includes building equipment operable to affect a physical state or condition of a building and a gateway device configured to couple to the building equipment via a wireless master slave / token passing (MS / TP) bus or a wired MS / TP bus. The gateway device is configured to communicate building data to a cloud-based platform including a hub configured to receive the building data, a plurality of cloud applications, wherein the plurality of cloud applications are configured to receive the building data from the hub and process the building data to provide a building data output. The cloud-based platform is configured to communicate the building data output to and receive a command based on the building data output from at least one of a control application, an analytic application, or a monitoring application. The gateway device is further configured to operate according to the command.

A local control unit operable as a master or slave device comprises: a memory, the memory indicating whether a converter subunit is enabled or disabled; and an enable; a wake-up output; a communication link input interface and a communication link output interface, the communication link input interface and the communication link output interface configured to receive and send master / slave information; and a further communication link input interface and a further communication link output interface, the further communication link input interface and the further communication link output interface configured to enable current balancing and phase staggering with other enabled converter subunits; in response to a respective local output current being above a first threshold value, sending a wake-up request to a next converter subunit; and in response to the local control unit being a slave subunit; the respective local output current being below a second threshold value, and receiving master / slave information indicating that the next enabled subunit is a master subunit, disabling itself.

The invention relates to the technical field of explosive control, and particularly discloses a relay type isolation RS-485 cascade networking concentrator for an exploder, which comprises a lithium battery power supply management module, a master node isolation RS-485 module, a multi-path slave node isolation RS-485 module and a pure hardware automatic transmit-receive direction control module. A single-branch fault does not influence the whole; the device is simple in structure, convenient to use, capable of being powered by a lithium battery and USB-C, convenient to deploy, capable of being directly connected between any master port and any slave port in series, capable of achieving random expansion of communication distance, supporting star-shaped / tree-shaped multi-stage relay networking and meeting the large-scale, safe and long-distance synchronous detonation requirements of thousands to tens of thousands of electronic detonators. The hidden danger of false triggering caused by software deadlock, time sequence drift or electromagnetic interference in a traditional scheme is avoided. And in a civil explosive electronic detonator initiation scene, the risk of error explosion caused by direction control errors is greatly reduced.

This invention provides a thermal management chip, system, and management method for a host with a built-in interface, including: a controllable current source sequence, temperature sensing device category control, an ADC module, a register group, interface, and control logic module, an NVM non-volatile memory, a clock generation module, and a local temperature sensing transistor. The thermal management chip also includes an Aip port, an Ain port, a PWM port, a TACH port, a master / slave mode selection port, an SDA port, an SCL port, and a status indicator port. This invention collects local temperature, remote temperature, and fan speed information from the thermal management chip, and flexibly controls the fan speed using a lookup table to reduce system energy consumption and extend fan life.

The invention relates to the technical field of FPGA (Field Programmable Gate Array) communication, and particularly discloses a design method based on multi-stage FPGA communication of a test machine, which comprises the following steps of: setting board card areas, and respectively setting a back board and a mother board in each board card area; each board card area is provided with a preset number of digital board cards and power supply board cards matched with the digital board cards; all board card areas are divided into two continuous areas, and the two continuous areas are respectively defined as a main area and a slave area; the general input / output interface on the host / slave is connected to the intermediate adapter plate through the backboard, then is connected to the mother board through the intermediate adapter plate, then is connected to the interface board card of the calibration board card through a cable, and finally reaches the main field programmable gate array of the calibration board card.

The invention belongs to the technical field of spaceflight embedded systems, and particularly relates to a master-slave internal bus communication design method for a spaceflight embedded system. The method comprises the following steps: designing an internal bus communication protocol frame structure and realizing communication between a master device and a slave device according to the frame structure; the designed internal bus communication protocol frame structure comprises a master / slave identifier, a frame type and a frame identifier, and the master / slave identifier is used for distinguishing whether a node for sending data in internal bus communication is a master node or a slave node; the frame type is used for distinguishing data and no data in an effective data area and is divided into a data frame and a remote frame; the frame identification is used for subdividing a data frame and a remote frame and determining the purpose of the frame, and the data frame comprises a conventional parameter-free instruction frame, a conventional parameter-carrying instruction frame, a telemetry request frame and a data transmission frame.

The embodiment of the present application relates to a kind of master-slave machine network based on the processing method of power line transceiving data signal, the method comprises: constructing master-slave machine network;When host sends high / low level data signal to slave, by host control its output level state presents opposite low / high level state and thus activate slave to complete corresponding high / low level data signal receiving processing locally;When slave sends high / low level data signal to host, on the premise that the output level state of host is high level state, by slave according to the high / low level feature of data signal, corresponding setting is completed locally by slave, and by host, according to the sampling voltage of current sampling resistance R S In host, data signal receiving processing is carried out.The difficulty and cost of implementation of master / slave machine can be reduced by the present application.

The application discloses a kind of flexible interconnection power distribution system fault-based multi-factor comprehensive evaluation master / slave station optimization switching method, comprising: 1, master station is converted to V / F control after power failure to support load, and the load power is calculated;2, by calculating the short-circuit ratio of slave station, determine that the system is in strong network or weak network environment;3, in strong network environment, screening is carried out according to power stability limit curve and controller parameter;4, in weak network environment, compare the power limit of each station by power transmission deviation threshold;5, select the site with the minimum line loss in the whole network as the new master station, switch to the constant DC voltage control, and the remaining sites maintain PQ control, so as to realize the optimization switching under fault state.The application takes stability as the premise, optimizes the master station by differentiated power grid environment evaluation, can reduce loss, improve operation efficiency, solve the parameter mismatch and power limitation problem in strong and weak network switching, and enhance the system fault self-healing reconstruction and steady-state operation ability.

Aspects of the disclosure are directed to a dynamic master slave flip flop circuit. In accordance with one aspect, the disclosure includes a master latch section configured to receive an input signal asserted at a HIGH state of the input signal; a clock circuit coupled to the master latch section, the clock circuit configured to execute a positive clock transition of a clock signal; and a slave latch section coupled to the master latch section and the clock circuit, the slave latch section configured to transition a state (Q) signal from a LOW state to a HIGH state of the state (Q) signal subsequent to the positive clock transition.

The invention relates to the technical field of networking control, and discloses a Bluetooth sound box networking control method and device and smart home equipment, a plurality of Bluetooth sound boxes are arranged in the smart home equipment, one of the Bluetooth sound boxes is configured as a host, and the remaining Bluetooth sound boxes are configured as slaves, the method comprises the following steps: after the slaves receive broadcast networking signals, sending the broadcast networking signals to the host; judging whether a first identifier corresponding to the bound host is stored on the slave side or not; if the first identifier is stored, comparing whether the first identifier is consistent with a second identifier carried by the broadcast networking signal; if yes, establishing a connection relationship with the target host so as to complete networking pairing with the target host; and if not, neglecting the broadcast networking signal. Visibly, the connection accuracy between the host and the slave in the Bluetooth sound box can be improved, the situation that audio playing is disordered due to wrong connection of the host and the slave is avoided, and the use experience of a user is improved.

A building management system (BMS) includes building equipment operable to affect a physical state or condition of a building and a gateway device configured to couple to the building equipment via a wireless master slave / token passing (MS / TP) bus or a wired MS / TP bus. The gateway device is configured to communicate building data to a cloud-based platform including a hub configured to receive the building data, a plurality of cloud applications, wherein the plurality of cloud applications are configured to receive the building data from the hub and process the building data to provide a building data output. The cloud-based platform is configured to communicate the building data output to and receive a command based on the building data output from at least one of a control application, an analytic application, or a monitoring application. The gateway device is further configured to operate according to the command.

The application provides a database high-availability implementation method and device, a database architecture, equipment and products. The method is applied to a database architecture, the database architecture comprises a master node cluster and a slave node cluster, the master node cluster comprises a master node, a backup master node, a first master proxy node and a first backup proxy node, the slave node cluster comprises a plurality of slave nodes, a second master proxy node and a second backup proxy node, and the method comprises the following steps: acquiring state information of each node in the database architecture; performing abnormality analysis on the state information to obtain an abnormality analysis result; and based on the abnormality analysis result, performing node switching on the database architecture, wherein the processing procedure of the node switching comprises at least one of master / backup switching of the master node, master / slave switching of the master node, switching within the slave node cluster, master / backup switching of the proxy node and node-free switching. The application can implement a database high-availability method with high accuracy and high fault tolerance.

The invention relates to the technical field of computers, in particular to a command scheduling method of a memory controller. In any SoC-based on-chip communication system, there is a plurality of master devices communicating with different devices through interconnects for routing traffic between the master / slave devices. The following situations may occur: a bandwidth-sensitive master device encounters data hunger, and a delay-sensitive master device cannot meet a low-delay requirement. Considering from the perspective of port starvation prevention, the method comprises the steps that an aging timer Timer is arranged for each direction of each port, a qos value is brought in through an AXI bus interface by a main device, and urgent signals on an AXI bus are passed, so that overall scheduling adjustment of cover commands is conducted in an omnibearing mode from three different angles, priorities of different command types are flexibly allocated, and the overall scheduling efficiency is improved. And the commands with different priorities can be efficiently and finely scheduled.

Aspects of the disclosure are directed to a dynamic master slave flip flop circuit. In accordance with one aspect, the disclosure includes a master latch section configured to receive an input signal asserted at a HIGH state of the input signal; a clock circuit coupled to the master latch section, the clock circuit configured to execute a positive clock transition of a clock signal; and a slave latch section coupled to the master latch section and the clock circuit, the slave latch section configured to transition a state (Q) signal from a LOW state to a HIGH state of the state (Q) signal subsequent to the positive clock transition.

This invention discloses a centralized OLT board switching management device and method based on CPLD. The device includes: a first board and a second board, the first board and the second board being communicatively connected; a first CPLD module and a second CPLD module, the first CPLD module being communicatively connected to the first board, the second CPLD module being communicatively connected to the second board, and the first CPLD module being communicatively connected to the second CPLD module; the first CPLD module and the second CPLD module also read external master / slave button status changes and board slot numbers, and control the power-on time of the first board and the second board; a first software system and a second software system, the first software system being communicatively connected to the first board and the first CPLD module respectively, the second software system being communicatively connected to the second board and the second CPLD module respectively, and the first software system being communicatively connected to the second software system. This invention uses CPLD control to determine the master / slave status of the two master controllers, control and determine the master / slave relationship between the two master controllers, and perform control management between the two master controllers.

A master / slave system according to the present disclosure comprises: a determination unit that determines whether a manipulation interface of a master robot manipulated by a user has deviated from a prescribed work area during the operation of the master robot and a slave robot; and a synchronization switching unit that, if the manipulation interface has deviated from the prescribed work area, performs a switch so as to release synchronization between the slave robot and the master robot.

The invention discloses a master / slave switching method and a master / slave switching system for redundant CPUs (central processing units) of a PLC (programmable logic controller), which are characterized in that whether the CPUs are subjected to master-slave switching or not is determined by weight calculation according to communication states of the master and slave CPUs and equipment. The communication states of the devices comprise the communication state of the CPU and the expansion rack, the communication state of the CPU and the upper computer, the communication state of the CPU and other participating logic control systems, the communication state of the CPU and the screen and other factors. The weight calculation comprises the steps of distributing different weight ratios for each communication state so as to ensure that the key communication has a higher priority, respectively calculating the weight value of each communication state through the weight calculation, and finally summing to obtain a switching weight value. And when the switching weight value calculation result is greater than 0, CPU master-slave switching is carried out, otherwise, the original state is kept. The invention aims to solve the problems of singleness and limitation of the existing CPU master-slave switching method, and improves the accuracy and real-time performance of switching decision through a communication state weight calculation mode.

The embodiment of the invention discloses a data query system, which is characterized in that a database server serving as a master node stores a master copy, at least one other database server serving as a slave node stores corresponding slave copies respectively, and when a load balancer receives a data query request, the data query request is sent to the slave node. The data query request is preferentially routed to the master node, then the master node selects a target slave node from the slave nodes, the data query request is routed to the target slave node, and the target slave node returns a slave copy stored in the target slave node. According to the system, the master / slave nodes storing the master / slave copies can cope with the concurrent query requests of the copies corresponding to the same partition, and the master node can directly route the data query requests to any slave node, so that the query efficiency of the distributed database system can be effectively improved.

The application discloses a kind of based on application layer scheduling's half duplex two-way communication control method, equipment and medium, it is related to communication technical field, the method is suitable for the master-slave device system connected with RS485 etc. Half duplex serial communication interface, especially suitable for hydrological element measuring probe automatic release system, the application defines master / slave information role in application layer, establishes priority message queue, sets up master information period sending mechanism, and adopts "follow" sending strategy, so that slave end instruction is sent immediately after receiving master end effective frame, to avoid channel conflict, simultaneously introduce heartbeat mechanism and instruction confirmation retransmission mechanism, guarantee the stability and integrity of communication.The application does not need to change hardware structure, and only by software control can significantly improve the reliability and real-time performance of half duplex system two-way communication.

This invention provides a simulation method for PSI5 circuit boards, belonging to the field of automotive electronics testing technology. Using an FPGA as the core control unit, it directly generates and parses the PSI5 protocol timing through hardware logic. First, it completes the initial configuration of the circuit board system, then flexibly selects the master / slave dual communication mode and completes the corresponding parameter configuration. Based on a DAC / ADC chip and a differential amplifier constant current circuit, it realizes hardware-level PSI5 protocol signal generation, combined with hardware closed-loop monitoring to complete real-time monitoring of synchronization pulse capture in slave mode and current readback in master mode. Simultaneously, a fault injection module enables controllable triggering of multiple types of faults and supports synchronous simulation of multi-channel independent logic resources. Combined with a dual-mode communication module, it completes remote parameter adjustment and data interaction. This invention achieves nanosecond-level synchronization accuracy, full parameter software adjustability, and full fault injection coverage, improving the real-time performance, reliability, and test coverage of PSI5 circuit board simulation.

This invention discloses a method for master / slave switching in TWS earphones while maintaining the continuity of the master earphone's local Bluetooth clock. The master and slave earphones first establish a classic Bluetooth connection. Either earphone initiates a master / slave switching command, and the other earphone accepts and responds. Either earphone specifies the time for the next communication. At the specified time, the slave earphone sends any data packet to the master earphone, which receives and replies with an arbitrary data packet response. Upon receiving the data packet, both earphones maintain their current communication timing. The slave earphone calculates the master earphone's local Bluetooth clock and immediately changes it to its own, switching its role to master and slave. The master earphone switches its role to slave and slave. This invention avoids the Bluetooth link between the master earphone and the smart device from being disrupted by changes in the master earphone's local Bluetooth clock after a master / slave switch, thus preventing connection loss.