47 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 utility model relates to the technical field of battery thermal management systems, in particular to a battery thermal management system of a double-unit electric wide-body vehicle. Comprising a master thermal management unit and a slave thermal management unit which are identical, a host controller of the master thermal management unit is in communication connection with the whole machine, a slave controller of the slave thermal management unit is in communication with the whole machine through the host controller, a master / slave definition module of the slave controller is communicated with a grounding signal, and the master / slave definition module of the host controller is suspended; the master heat management unit and the slave heat management unit are communicated with the waterway assembly, and the other end of the waterway assembly is communicated with a waterway channel in the power battery pack. The problem of automatic networking of heat management units of the same model is solved, the working states of the master and slave machines are distinguished by setting grounding signals through the slave machines, the installation is convenient, and a background control system is simplified.

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.

The invention relates to the technical field of industrial robot polishing and grinding machining, in particular to a double-robot collaborative polishing and grinding machining system and method, and solves the technical problems that according to an existing method, double-face collaborative control is difficult to achieve, and machining of any face can directly affect machining deformation of the other face. The device comprises a base, a rotary table, a driving mechanism and a master / slave six-degree-of-freedom industrial robot, the driving mechanism is used for driving the rotary table to rotate around a Z axis, the rotary table is fixedly connected with a clamp used for clamping a blade to be polished and ground, the master / slave six-degree-of-freedom industrial robot is connected with a master / slave polishing and grinding assembly, and the master / slave polishing and grinding assembly is connected with a master / slave flap wheel used for double-sided collaborative polishing and grinding of the blade. According to the double-robot collaborative polishing and grinding machining method, online programming track planning of the robots is achieved through the polar coordinate system, the track planning difficulty is lowered, the motion tracks of the robots are simplified, the motion precision and the feedback speed of the robots are effectively improved, and the control precision of double-robot collaborative polishing and grinding machining is improved.

A method for determining a master-slave node is provided. The method includes: determining a first target node, a second target node, a third target node and a fourth target node from the plurality of storage nodes, where the first target node includes first check data including a first first character and a first last character; generating heartbeat signals and master-disable signals for the target nodes; determining the first target node as a master node when the first first character and the first last character are the same and the first first character and the first last character are the same as a preset value, it is determined that the second target node, the third target node and the fourth target node are not master nodes, the first target node is not a slave node, the first master-disable signal is invalid, and the first heartbeat signal is in a normal state.

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.

The invention belongs to the technical field of avionics, and provides a full-aircraft comprehensive alarm method and system in a main-standby mode, and the method comprises the steps: collecting the current state parameters of all systems on an aircraft in real time, and generating current alarm information; according to the current alarm information, judging whether the current alarm information is a new alarm or continuously generating an alarm through alarm processing logic, and sending the current alarm information which is judged to be the new alarm or continuously generating the alarm to a local alarm information base to update the local alarm information base; packaging all alarm information generating alarms in the updated information base, and sending the packaged alarm information to a first alarm device through a main / backup bus; and sorting the alarm information in the updated information base according to a preset logic sequence, packaging according to a sorting result, and sending the packaged alarm information to the second alarm device through the main / backup bus. According to the method, real-time alarm processing can be carried out on the airplane and is fed back to each alarm device, and meanwhile, the safety redundancy of the airplane is improved by adopting the main bus and the standby bus.

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.

A stackable switch unit and a method for using a stackable switch unit, comprising: the stackable switch unit has a plurality of signal ports, and the plurality of signal ports include a master / slave control port; and during a power-on startup program of the stackable switch unit, automatically determine whether the stackable switch unit is a master switch unit or a slave switch unit according to the signal level of the master / slave control port and / or the content of the data obtained from the master / slave control port.

The invention discloses a multi-factor-based collaborative strategy making and efficiency pre-evaluation method and system. The method comprises the following steps: analyzing a collaborative tracking task demand and a node working state; screening an effective node combination based on a detection capability matching criterion, and optimizing node selection through a constraint condition; a tracking strategy is formulated by combining target motion parameters, and master / slave node roles are distributed; constructing an efficiency estimation model by using multiple factors, and dynamically correcting an evaluation result through actual feedback data to form a closed-loop optimization mechanism; the system comprises a data receiving module, a task analysis module, a node selection module, a strategy making and issuing module and an efficiency estimation and evaluation module, and full-process automation from task analysis to dynamic adjustment is achieved. Through multi-factor weighted evaluation and feedback correction, the robustness of a collaborative strategy is improved, the resource utilization rate and the tracking precision are optimized, and the method is suitable for a multi-node collaborative detection task in a complex scene.

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.

The utility model relates to the technical field of power amplifier equipment switching, and discloses a power amplifier main and standby equipment switching circuit which comprises a first change-over switch module and a second change-over switch module. According to the application, the first change-over switch module and the second change-over switch module receive the same control signal to realize the switching between the main and standby devices, and the types of electronic components are single, so that the problems of production efficiency, finished product management and comprehensive cost caused by the optimization of the power amplifier main and standby device switching circuit structure are finally solved.

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 present invention discloses a system for judging the primary / backup status of a dual system that meets the safety level of SIL4, which relates to the technical field of dual-machine hot standby systems; it includes a first single-mode channel and a second single-mode channel that are both connected to the backplane and have the same structure; the first single-mode channel includes a first CPU, a second CPU, a first FPGA module, a second FPGA module, and a backplane interface. The first FPGA module and the second FPGA module are both connected to the backplane interface, and a master / slave status output circuit and a master / slave status acquisition circuit are provided between the first FPGA module and the backplane interface and between the second FPGA module and the backplane interface respectively; the first single-mode channel and the second single-mode channel are respectively connected to the backplane through their respective backplane interfaces, and the first single-mode channel and the second single-mode channel respectively output two groups of SPI signals through the SPI communication interface circuit between them and the backplane interface; the beneficial effect of the present invention is that it can effectively judge the primary / backup status of the dual system and ensure data exchange between the dual systems.

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.

According to the safety and stability control system and method for expandable inclusion of the new energy, the system comprises the new energy execution station, the new energy master / slave station and the strategy master station which are in multi-level connection according to the sequence from low to high, and the new energy master / slave station can be expanded into multiple levels. During energy control, the new energy execution station summarizes new energy switchable information step by step through the multi-level new energy master / slave stations and uploads the information to the strategy master station, and the strategy master station generates a generator tripping instruction according to summarized data and performs generator tripping amount distribution step by step in the new energy master / slave stations by using the instruction. And finally, a control instruction is generated and issued to the new energy execution station for execution. The system guarantees the control precision through the expandability of the new energy master / slave station. Besides, after the new energy master / slave station of each level receives the uploaded data of the lower-level station or the issuing instruction of the upper-level station, data summarization or generator tripping amount distribution can be carried out according to the regional attributes, so that the accurate control of the new energy resources is further improved.

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.

The invention provides an optical line terminal and a main / standby switching method thereof. The invention provides a main / standby switching method for an optical line terminal. The method comprises the following steps: establishing a remote procedure call communication channel through a direct-connection link of an opposite-end optical line terminal of a direct-connection optical fiber backup group; receiving a first active / standby switching notification message through the remote procedure call communication channel; receiving a first data message with double layers of VLAN tags through the direct link, wherein the outer layer VLAN tag is a reserved VLAN tag; stripping off the reserved VLAN label of the first data message and caching the reserved VLAN label; switching a local passive optical network PON port connected with the optical splitter from a protection state to a working state based on the main / standby switching notification message or the first data message; and sending the cached first data message through the local PON port in the working state.

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.