Disclosure of Invention
In order to overcome the defect of the prior art in the aspect of data synchronization of the double-screen display equipment, the invention provides a method and a device for double-screen independent operation and data synchronization. The method can realize the data synchronization of two independent display devices, simultaneously maintain the independent display functions, and ensure that one device can still normally operate when the other device fails. In addition, the invention supports integration with the cloud platform, so that the equipment can not only realize unified management and analysis of data, but also improve the operation efficiency by optimizing resource allocation, and obviously reduce response and repair time when the equipment fails. By the method, the reliability and the efficiency of the double-screen control system can be improved, and the dependence on operators can be reduced, so that the overall working efficiency is improved, and the maintenance cost is reduced.
In order to achieve the above object, the present invention provides the following technical solutions:
A method for synchronizing double-screen independent operation and data comprises the following steps:
s1, setting two display devices with independent display, processing and storage functions, wherein each device can independently run and respectively execute different operation tasks;
S2, generating operation data on the first equipment, generating a unique identifier UUID for each operation, and storing the operation data and the UUID in a first equipment database;
s3, transmitting the operation data and the UUID to second equipment, analyzing the received operation data and UUID by the second equipment, and storing the operation data and the UUID in a second equipment database;
s4, verifying the data consistency of the first equipment and the second equipment through UUID, and synchronizing operation data;
s5, when the first equipment or the second equipment fails, the other equipment can still independently operate.
Preferably, the operation data and UUID in step S2 are serialized by a standardized data format, where the standardized data format includes at least one of JSON or Protocol Buffers.
Preferably, the operation data and the UUID are transmitted through a network transmission protocol, wherein the network transmission protocol comprises TCP/IP and HTTP.
Preferably, the first device and the second device both install and run a Linux operating system, and the Linux operating system supports multi-user, multi-task and multi-thread parallel processing.
Preferably, the first device and the second device are both operated with an application program comprising a UI layer and a back end, the application program adopts a front-back end separation design, the back end is used for data processing and information transmission, the UI layer is used for display and user interaction, and the UI layer and the back end are used for data communication through an API.
Preferably, the operation data in step S2 includes addition, deletion or modification of data, and further includes display data synchronization of the UI layer.
Preferably, step S4 further comprises, when it is verified that the data between the first device and the second device are inconsistent, automatically starting a data recovery mechanism by the system, and synchronizing the data of the second device to the first device or synchronizing the data of the first device to the second device.
Preferably, the fault in step S5 is determined by detecting a state of a network connection between the first device and the second device, and when a network connection interruption is detected, the fault is determined, and the first device and the second device maintain and monitor the state of the network connection by periodically transmitting a heartbeat signal.
Preferably, when the network connection is interrupted, the first device and the second device can store the operation data locally and automatically synchronize the data by UUID after the network is restored.
Preferably, the system further comprises a control circuit, wherein the first equipment and the second equipment are connected with the control circuit through a network, and the control circuit receives operation instructions sent by the first equipment and the second equipment and returns processing results in real time for updating display contents.
Compared with the prior art, the invention has the beneficial effects that:
The invention provides a method for double-screen independent operation and data synchronization, which aims to solve the problem that double-screen equipment affects system operation during synchronous delay and faults. The technical scheme of the invention relates to two display devices with independent display, processing and storage functions, namely a first device and a second device. Each device can independently run, execute different operation tasks, and are independent of each other. Even if one of the devices fails, the other device can continue to operate, thereby ensuring the stability and fault tolerance of the system. By means of the double-screen independent operation design, the system reliability is remarkably improved, and the risk of overall system shutdown caused by single equipment failure is avoided.
In operation, the present invention achieves data synchronization by generating a unique identifier UUID. Specifically, a UUID is generated on the first device for each operation and the operation data is stored with the UUID in a database of the first device. These operation data and UUID are then transmitted to the second device via the network protocol. After the second device receives the data, it parses it and stores the data in a local database. By the mechanism, data consistency between two devices can be ensured, and data repetition or collision is avoided. Meanwhile, the system performs consistency check on the data through the UUID, and the accuracy and the integrity of the data in the transmission process are ensured.
The invention also adopts a high-efficiency data transmission mechanism, and the operation data and UUID are serialized through a standardized data format, for example, a JSON or Protocol Buffers format is adopted, and then are transmitted to the second equipment through network protocols such as TCP/IP, HTTP and the like. The data transmission mode can ensure that data among different devices can be synchronized rapidly and accurately, improves transmission efficiency and ensures consistency and stability of the data.
In order to ensure continuous connection of devices, the device of the present invention maintains the state of network connection by periodically transmitting heartbeat signals. The heartbeat signal not only can monitor the connection between the devices, but also can discover and process network faults in time, thereby ensuring the real-time performance and stability of the system. Meanwhile, when the network is interrupted or the data of the devices are inconsistent, the system can automatically start a data recovery mechanism, so that the data of the two devices are ensured to be consistent after the data recovery. The mechanism improves the fault tolerance of the system under the condition of unstable network, and reduces the data loss and synchronization interruption caused by network faults.
The technical scheme of the invention remarkably improves the stability, fault tolerance and reliability of data synchronization of the system through the design of efficient data transmission, UUID consistency verification, double-screen independent operation, network fault tolerance mechanism and the like, and is particularly suitable for application scenes needing high real-time performance and data consistency.
Detailed Description
The method and the device for double-screen independent operation and data synchronization provided by the invention are further described in detail below with reference to the accompanying drawings and the specific embodiments. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention. The advantages and features of the present invention will become more apparent in conjunction with the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
Example 1
The embodiment 1 of the invention provides a method for independently running and synchronizing data of double screens, which is shown in fig. 1, and ensures that an efficient data synchronization and fault tolerance mechanism is realized under the condition that the double-screen equipment respectively executes different tasks, and is suitable for a scene requiring high reliability and real-time data processing. The method specifically comprises the following steps:
S1, equipment configuration and independent operation
Two display devices with independent display, processing and storage functions are arranged, namely a first device and a second device. Each device is capable of independent operation, performing different operational tasks. For example, a first device may be used to display real-time data and a second device may be used to display system status and control options. Each device can process the respective tasks simultaneously through independent processing and display modules, and the tasks are independent of each other.
S2, operation data generation and UUID allocation
When a user performs an operation on a first device, the system generates a unique identifier (UUID) for the operation, ensuring the uniqueness of the data for each operation. The operation data is stored in a database of the first device together with the UUID. This mechanism ensures the uniqueness and traceability of each operation data as it is transferred and synchronized between devices.
S3, data transmission and analysis
The operation data and UUID are transmitted from the first device to the second device via a network protocol such as TCP/IP or HTTP. After the second device receives the data, the operation data and the UUID are analyzed, and the analyzed data are stored in a database of the second device. By means of the mechanism, the second device can acquire the operation data of the first device in real time, so that the data synchronization between the two devices is kept.
S4, data consistency verification
After the data transmission is completed, the system performs consistency check on the data between the first device and the second device through the UUID. By comparing UUIDs of the two devices, the system can confirm whether the data of the two devices are consistent, so that the synchronization accuracy of the operation data is ensured. This step ensures that no data loss or retransmission occurs when data synchronization is performed between a plurality of devices.
S5, independent operation in fault
During the operation of the system, if one of the first device or the second device fails, the other device can still keep running independently and continue to process its task. Even if the device is interrupted, the system ensures that the data cannot be lost through a fault-tolerant mechanism. After the fault equipment is recovered to be connected, the system can recover data synchronously through the UUID, and data consistency is ensured.
Example 2
As a further improvement to the foregoing embodiments, the present embodiments relate to a dual-screen independent operation and data synchronization device that meets the demands for high reliability and data consistency in the life, instrumentation and industrial fields. The device for independently operating and synchronizing the data of the double screens consists of a hardware layer and a control system layer.
As shown in fig. 2, the figure shows a dual-screen device, a main control board and a system architecture connected through an ethernet, and shows how the dual-screen device operates independently and synchronizes with data.
The hardware layer comprises a first device, a second device, a control circuit, a sensor, a connecting line and an interface. Wherein:
(1) The first device and the second device comprise two independently operated touch screen display devices, and can respectively and independently display and process data without interference.
(2) The control circuit and its sensor are connected by Ethernet or other communication mode to provide necessary data input and feedback for data transmission and equipment control, and the hardware layer supports the access of various sensors and control circuits.
(3) Connection lines and interfaces, interfaces including ethernet, USB, COM, RTC, SDCard, etc., for data communication between devices and access to external data.
The control system provides basic operation logic and control flow for the whole equipment, and comprises an operating system, a database, a data synchronization flow, a UI layer, a back-end logic control application, a message bus system and a data communication protocol. Wherein:
(1) The operating system adopts Linux or other multi-user and multi-task operating systems, and supports efficient management of devices and multi-thread application development.
(2) The database adopts an embedded database such as SQLite3 to carry out persistent storage on the data and support complex data operation and quick access.
(3) The data synchronization flow includes a real-time update mechanism of data, such as adding, deleting, modifying, etc., and uses a UUID, etc. mechanism to ensure real-time consistency of data between the first device and the second device.
(4) The UI layer can timely feed back to the display interface when receiving data update or system notification, and is separated from the back-end logic control application by adopting a design mode of separating front ends from back ends, and the UI layer performs data communication with the back-end logic application through an API.
(5) The back-end logic control application is communicated with the UI layer, is responsible for calling a database, is responsible for establishing a message bus, is responsible for communicating with another device, is responsible for controlling a bottom layer circuit and a sensor thereof, is responsible for business logic control and the like.
(6) The message bus employing a high-performance data transmission protocol, e.g. using google protocol buffer
The data are serialized, and data synchronization and communication between devices are performed through a 0MQ message bus.
(7) Data communication protocol, defining data format (such as JSON) and communication protocol, optimizing data transmission efficiency and time delay.
Initialization flow of the device:
the device power-on initialization flow is as shown in the attached figure 3:
The first device and the second device use a unified power supply, the first device and the second device are required to be powered on simultaneously, and when the power supply is connected, the device firstly loads boot loader, loads Linux kernel, runs system service, runs a back-end program and runs a front-end UI program.
The back-end logic control application program initialization flow:
Reading a loading configuration file, initializing a log handle, initializing a global variable and a cache, judging first equipment and second equipment, establishing message bus channels of the first equipment and the second equipment, initializing a data transmission module of the first equipment and the second equipment, opening a database, acquiring configuration and initialization information thereof, initializing a front-end communication module, an initialization and control circuit and a sensor module, starting a front-end process to operate, waiting for the front-end loading database to display, and dispatching a cyclic event.
UI process initialization flow:
The method comprises the steps of initializing a log module, initializing a global variable, initializing an IPC interface communicated with a back end, requesting an API to obtain information when the back end is powered off last time, requesting the API to obtain information required by display, initializing the interface, requesting the API to obtain database information, waiting for a UI touch event or a back end event, and rendering the UI.
The initialization process is shown in the attached figure 4.
Example 3
As a further improvement to the foregoing embodiments, the method of the present invention will be described in detail with reference to the two-screen data synchronization flow chart of FIG. 5. The embodiment provides a method for synchronizing double-screen independent operation and data, which considers how data are synchronized and exception handling under different scenes.
Detailed description is shown in fig. 5, which is an interaction flow under normal operation of the dual-screen display device of the system, and how the device implements data synchronization will be discussed below:
And S101, after the equipment is uniformly electrified, initializing front and back ends, establishing connection between the first equipment and the second equipment by using a message bus through a back end program, and sending a heartbeat every second for maintaining the connection state of the first equipment and the second equipment.
And S102, under the condition that the first device and the second device are in bus connection, the first device performs adding, deleting and modifying operations on the database, and each operation generates a random number UUID and stores the random number UUID in the local database. Feedback to the UI display if needed.
S103, while storing the local database, packaging the operation content and the random number UUID into a JSON format and transmitting the operation content and the random number UUID to the second device through the message bus 0MQ by using a serialization google protocol buffer protocol.
And S104, after the second equipment receives the data, the second equipment deserializes google protocol buffer protocol content to obtain JSON data, operates the second equipment database to store, stores the random number UUID, and returns the storage result to the first equipment when the random numbers of the first equipment and the second equipment are consistent. Feedback to the UI display if needed.
S105, if the database is operated on the second device, the database is sent to the first device for storage in the mode, and if necessary, the database is fed back to the UI for display. The basis for judging whether the databases are consistent in the process is whether the random numbers UUIDs are consistent.
S106, for the request which does not affect the database and only affects the UI interface display, the request can be directly sent to the opposite device in a notification mode, and the UI is notified to change the display, and the generation of a random number UUID is not needed.
The above is a data synchronization scheme under normal conditions, and the abnormal condition analysis of the device of fig. 6 will be combined.
And S201, after the equipment is uniformly powered on, initializing front and back ends, establishing connection between the first equipment and the second equipment by using a message bus through a back end program, and sending a heartbeat every second for maintaining the connection state of the first equipment and the second equipment.
S202, after the equipment is successfully connected, comparing whether the random number UUIDs on the rear end of the double-screen display screen are consistent, and if not, starting a second equipment backup flow.
S203, the second device actively grabs the first device database and restarts the second device program to load a new database, so that the data of the first device and the data of the second device are consistent.
And S203, in the use of the equipment in operation, when the first equipment is disconnected from the second equipment (the ping heart fails), the second equipment is supposed to be abnormally powered down or the Ethernet network cable is disconnected.
At this time, the first device modifies the database and stores the random number locally, when the second device is powered on to restore the connection, the second device can find the inconsistency compared with the random numbers of the two devices, the first device has data update, the second device has no data modification, the second device can automatically grab the first device database in a file mode, and the front-end and back-end service programs are restarted to reload the new database.
As shown in detail in fig. 7, when the first device and the second device are disconnected, the second device modifies the database, and the first device and the second device resume connection. The random numbers of the two devices are not consistent, the second device has data update, the first device does not have data update, the first device grabs the second device database in a file mode, and the front-end service program and the back-end service program are restarted to reload a new database.
As shown in FIG. 8, if the two devices are disconnected, the first device and the second device work normally, if the two devices modify the databases and the random numbers are inconsistent, after the network is restored, the database of which is not the latest is judged, at the moment, the second device shall grasp the second device database in a file mode by taking the first device database as a standard, and the front-end and back-end service program is restarted to reload the new database.
For data of the UI display interface, the data will be synchronized to the opposite device in a buffered manner.
As shown in fig. 9, if two devices are in normal communication, the display on the UI is sent to the opposite device by way of notification, and no data modification is performed.
Example 4
The embodiment describes how to apply the double-screen independent operation and data synchronization method of the invention in the constant temperature steam box control system. The system comprises one or more steam chambers, a control circuit, and two display controllers (a first device and a second device) for monitoring and controlling the temperature, water level and pressure of the steam chambers in real time so as to realize stable constant-temperature heating.
The constant temperature steam box control system comprises the following key parts:
The steam chamber is provided with a heater, a temperature sensor, a water level sensor and a pressure sensor for monitoring and adjusting the temperature, the liquid level and the pressure of the steam chamber.
And the control circuit is connected with the first equipment and the second equipment through the Ethernet, and is responsible for collecting sensor data and sending the sensor data to the display. Meanwhile, the control circuit controls the heating process of the heater through the relay, so that the heater can be ensured to operate efficiently.
And the display controller is used for displaying real-time data fed back by the sensor, wherein the first equipment and the second equipment are respectively used for different tasks, the first equipment can be used for setting control operations such as heating temperature and the like, and the second equipment is used for displaying real-time data fed back by the sensor.
The method comprises the following steps:
Two display devices with independent display, processing and storage functions are arranged, namely a first device and a second device. Each device runs independently, performs different operational tasks, and is independent of each other. The first device is used for setting target temperature and heating parameters of the steam chamber, and the second device is used for displaying real-time temperature, water level and pressure data.
When a user sets a heating target temperature (e.g., 100 degrees celsius) on a first device, the system generates operational data and generates a unique identifier (UUID) for the data. The operation data and UUID are stored in a database of the first device.
The operation data and UUID of the first equipment are transmitted to the control circuit through the Ethernet, the control circuit executes the operation instruction, and the heater relay is opened for heating. Meanwhile, the control circuit collects data of the temperature sensor, the water level sensor and the pressure sensor. The control circuit then transmits the sensor feedback data to the first device and the second device via the ethernet.
The sensor data and UUID received by the second device are parsed and stored in a database of the second device. Although the two devices use the same data synchronization mechanism, the display content is different, namely, the first device displays the temperature set by the user and the operation control interface, and the second device displays sensor data such as the temperature, the water level and the pressure of the steam chamber, which are fed back in real time. The method meets the design requirement that the double-screen equipment runs independently and displays different tasks.
And the system verifies the data consistency of the first equipment and the second equipment through the UUID, and ensures that the understanding and storage of the operation data and the sensor feedback of the two equipment are consistent. When two devices detect inconsistency, the system can automatically start a data recovery mechanism, and data are synchronized through UUID verification, so that accuracy of the data is ensured.
When the first equipment or the second equipment fails, the other equipment can still continue to independently operate, and continuous operation of the system is ensured. For example, if the first device is out of order, the second device may still display the current vapor chamber status (e.g., temperature, water level, pressure) while the control circuit continues to perform the set heating tasks, avoiding system downtime.
By the double-screen independent operation and data synchronization method, the constant temperature steam box control system realizes data synchronization between display devices, and simultaneously ensures that the devices can independently operate, and system shutdown caused by failure of a single device is avoided. The design improves the fault tolerance and stability of the system, is suitable for complex industrial control environments, and is particularly suitable for a constant temperature control scene with high requirements on real-time data monitoring and operation synchronization.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.