Wireless communication method of DCS (Distributed Control System) controller and related equipment

Abstract

The invention discloses a wireless communication method of a DCS controller and related equipment, and belongs to the field of industrial automation, and the method comprises the following steps: obtaining data of field measurement equipment and control equipment, and encoding the data to obtain binary data; modulating the binary data to obtain a LoRa signal, and transmitting the LoRa signal to a DCS controller through a wireless channel; and after the LoRa signal in the DCS controller is decoded, data of the field measurement type equipment and the control type equipment are obtained. According to the invention, the problem that LoRa communication cannot be effectively applied to the DCS controller in the prior art can be solved.

Description

Technical Field

[0001] The invention belongs to the field of industrial automation, and in particular relates to a wireless communication method of a DCS controller and related equipment. Background Art

[0002] As the core equipment, the Distributed Control System (DCS) controller undertakes the important task of comprehensively monitoring and controlling the industrial process. The traditional communication method of DCS controller mainly relies on wired connection. Although this method is stable and reliable, it is difficult to wire, costly, and has limited flexibility in complex and changing industrial environments. With the continuous development of wireless communication technology, especially the rise of Low-Power Wide-Area Network (LPWAN) communication technology, new solutions are provided for the wireless communication of DCS controllers.

[0003] As one of the LPWAN communication technologies, LoRa (Long Range) has gradually become a communication technology that has attracted much attention in the field of industrial Internet of Things due to its ultra-long-distance wireless transmission, long battery life, and large-capacity system. It uses spread spectrum technology and can operate in global free frequency bands such as 433, 868, and 915 MHz, providing users with simple and efficient wireless transmission solutions. In addition, with the continuous advancement of technology, a new generation of LoRa wireless RF chips has emerged. These chips operate in a wider frequency band, such as 410.125MHz to 493.125MHz. They not only have longer transmission distances, faster speeds, and lower power consumption, but are also smaller in size and have high reliability and flexibility.

[0004] However, despite the many advantages of LoRa technology in the field of industrial Internet of Things, how to effectively apply it to the wireless communication of DCS controllers is still an urgent problem to be solved. Traditional DCS controller wireless communication methods are often limited to simple point-to-point communication, which is difficult to meet the high requirements for flexibility and reliability in complex industrial environments. Summary of the invention

[0005] The object of the present invention is to provide a wireless communication method and related equipment for a DCS controller to solve the problem that the prior art cannot effectively apply LoRa communication to a DCS controller.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, a wireless communication method of a DCS controller comprises the following steps: After acquiring and encoding the data of field measurement equipment and control equipment, binary data is obtained; The binary data is modulated to obtain a LoRa signal, and transmitted to a DCS controller via a wireless channel; After decoding the LoRa signal in the DCS controller, the data of the field measurement equipment and control equipment are obtained.

[0007] In some implementations, the step of modulating the binary data to obtain a LoRa signal and transmitting the signal to the DCS controller via a wireless channel specifically includes: The binary data of each node is modulated to obtain the LoRa signal, which is sent to the gateway through the wireless channel. The gateway transmits the LoRa signal of each node to the DCS controller.

[0008] In some implementations, the step of modulating the binary data to obtain a LoRa signal and transmitting the signal to the DCS controller via a wireless channel specifically includes: The binary data of the source node is modulated to obtain a LoRa signal, and is sent to a routing link through a wireless channel. The routing link forwards the LoRa signal to a gateway, and the gateway transmits the LoRa signal to a DCS controller.

[0009] In some embodiments, the source node includes a short-distance node and a long-distance node, and the LoRa signal of the long-distance node is sent to the routing link through a wireless channel and then transmitted to the DCS controller through a gateway; The LoRa signal of the short-range node is directly sent to the gateway via a wireless signal and transmitted to the DCS controller.

[0010] In a second aspect, a wireless communication system of a DCS controller includes: The field measurement control data acquisition module is used to obtain the data of field measurement equipment and control equipment and encode them to obtain binary data; A LoRa point-to-point communication module, used to modulate the binary data to obtain a LoRa signal, and transmit it to a DCS controller through a wireless channel; The data decoding module is used to decode the LoRa signal in the DCS controller to obtain the data of the field measurement equipment and control equipment.

[0011] In some embodiments, it further comprises: The star topology network communication module is used to modulate the binary data of each node to obtain the LoRa signal, and send it to the gateway through the wireless channel. The gateway transmits the LoRa signal of each node to the DCS controller.

[0012] In some embodiments, it further comprises: The Mesh networking communication module is used to modulate the binary data of the source node to obtain a LoRa signal, and send it to the routing link through a wireless channel. The routing link forwards the LoRa signal to the gateway, and the gateway transmits the LoRa signal to the DCS controller.

[0013] In some embodiments, the Mesh networking communication module is specifically used to send the LoRa signal of the long-distance node to the routing link through the wireless channel, and then transmit it to the DCS controller through the gateway; the LoRa signal of the short-distance node is directly sent to the gateway via the wireless signal, and transmitted to the DCS controller, and the source node includes the short-distance node and the long-distance node.

[0014] In a third aspect, an electronic device includes a memory, a processor, and a computer program stored in the memory and executable in the processor, wherein the processor implements the steps of the wireless communication method of a DCS controller when executing the computer program.

[0015] In a fourth aspect, a computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the wireless communication method of a DCS controller are implemented.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention modulates the binary data to obtain a LoRa signal, and transmits it to the DCS controller through a wireless channel. By adopting the LoRa wireless communication technology, the DCS controller can achieve ultra-long-distance data transmission and significantly expand the communication range; the DCS controller communication system of the present invention can extend the battery life and reduce the maintenance cost while ensuring the stability of data transmission, which is particularly important for industrial equipment that requires long-term stable operation and is not easy to replace batteries; the present invention adopts LoRa signals for transmission, has strong anti-interference ability and data error correction mechanism, and can maintain the reliability and stability of data transmission in complex and changeable industrial environments. In addition, the present invention adopts LoRa wireless communication, which can avoid the cumbersome wiring work between measurement and control equipment and the DCS controller, reduce the difficulty and cost of deployment, and support the access of a large number of devices, so that the DCS controller can easily cope with the situation of a large number of devices in the industrial field, which helps to improve the automation level and intelligence level of the industrial process.

[0017] Furthermore, the present invention modulates the binary data of each node to obtain a LoRa signal, and sends it to the gateway through a wireless channel, and the gateway transmits the LoRa signal of each node to the DCS controller; it can also modulate the binary data of the source node to obtain a LoRa signal, and send it to a routing link through a wireless channel, and the routing link forwards the LoRa signal to the gateway, and the gateway transmits the LoRa signal to the DCS controller. Therefore, the present invention can support multiple communication modes such as LoRa point-to-point communication, star topology network communication, and Mesh networking communication, improve the flexibility and adaptability of the system, and is suitable for industrial sites of different scales and complexities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the point-to-point LoRa network structure provided for this embodiment; Figure 2 A schematic diagram of a star network topology structure provided for this embodiment; Figure 3 A schematic diagram of the Mesh network topology provided in this embodiment; Figure 4 A flow chart of a wireless communication method for a DCS controller provided in this embodiment; Figure 5 A structural diagram of a wireless communication system of a DCS controller provided in this embodiment. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, and the described content is intended to explain the present invention rather than to limit it.

[0020] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, systems, products or apparatus.

[0021] like Figure 4 As shown, this embodiment provides a wireless communication method for a DCS controller, comprising the following steps: S1, obtain the data of field measurement equipment and control equipment and encode them to obtain binary data; S2, modulating the binary data to obtain a LoRa signal, and transmitting the signal to a DCS controller via a wireless channel; This step realizes the wireless transmission of point-to-point LoRa network structure, such as Figure 1 As shown, the host node is the core part of the entire network. It is responsible for receiving, processing and forwarding data. The host node is connected to the DCS controller through the serial port to achieve communication with the central control system. The slave nodes are device nodes distributed on site. They are responsible for data collection and device control. The slave nodes are connected to the measurement and control devices on site through the serial port to achieve direct monitoring and control of the on-site equipment. The measurement and control equipment is a key component of the site. They are responsible for data collection and transmission. After collecting the data on site, they are sent to the host node through the slave node and then to the DCS controller. Specifically, the measurement and control equipment is responsible for collecting various data on site, such as temperature, humidity, pressure, etc. The collected data is transmitted over long distances through the slave node using LoRa technology and sent to the host node. After receiving the data, the host node processes and analyzes it, and then sends the results to the DCS controller. The DCS controller sends control instructions to the measurement and control equipment on site through the host node and the slave node to achieve remote control of the equipment.

[0022] S2 also specifically includes: modulating the binary data of each node to obtain a LoRa signal, and sending it to the gateway through a wireless channel. The gateway transmits the LoRa signal of each node to the DCS controller, thus realizing wireless transmission of the star topology network. Figure 2 As shown in the figure, the center of the star structure is the gateway, which is connected to the DCS control through the serial port; the other connections are nodes, which are connected to the on-site measurement equipment and control equipment through the serial port, and the gateway communicates with each node. The most common application of LoRa is also to use this network. For different applications, the configuration and use of the LoRa gateway of the star network are different. Due to the use of node chips, the gateway can only receive a fixed frequency, spread factor, bandwidth parameter combination. For multi-channel and downlink control, a variety of different gateway forms and network application forms have been derived.

[0023] S2 also specifically includes: modulating the binary data of the source node to obtain a LoRa signal, and sending it to the routing link through a wireless channel, the routing link forwards the LoRa signal to the gateway, and the gateway transmits the LoRa signal to the DCS controller to achieve Mesh network transmission. The source node includes a short-distance node and a long-distance node. The LoRa signal of the long-distance node is sent to the routing link through a wireless channel, and then transmitted to the DCS controller through the gateway; the LoRa signal of the short-distance node is directly sent to the gateway through a wireless signal and transmitted to the DCS controller.

[0024] like Figure 3As shown in the figure, Mesh network is a "wireless mesh network" and a "multi-hop" network. With its multi-hop interconnection and mesh topology characteristics, wireless Mesh network has evolved into a multi-node, long-distance application scenario suitable for industrial scenarios. Common LoRaMesh applications include data transmission of industrial field sensor equipment and smart meters. Figure 3 The figure shows a common Mesh networking method. The center of the Mesh networking structure is the gateway, which is connected to the DCS control through the serial port. The other connections are routing and nodes. The nodes are connected to the on-site measurement equipment and control equipment through the serial port. Close nodes can communicate directly with the gateway, and long-distance nodes can communicate with the gateway through routing links.

[0025] S3, after decoding the LoRa signal in the DCS controller, obtain the data of the field measurement equipment and control equipment.

[0026] The wireless communication method of the DCS controller provided in this embodiment can save the transformation cycle, does not require large-scale construction, and eliminates the trouble of wiring maintenance. It can quickly complete the transformation and meet the communication stability requirements. The wireless communication terminal only needs to access the signal and supply power to start using, which reduces the difficulty of installation. Based on the LoRa wireless communication protocol, data transmission is reliable and fully digital wireless encrypted transmission; through the DCS controller wireless communication method, it can quickly access on-site measurement equipment and control equipment and connect them into a wireless communication network system, realize two-way data transmission and information exchange, and realize flexible and reliable networking methods, thereby expanding the sensor network.

[0027] like Figure 5 As shown, this embodiment configures the DCS controller to support the LoRa wireless communication protocol; in combination with the wireless communication topology supported by the LoRa wireless communication protocol, the DCS controller, the field measurement equipment and the control equipment configured with the LoRa wireless communication protocol are connected to realize the wireless communication system of the DCS controller, which includes: The field measurement control data acquisition module is used to obtain the data of field measurement equipment and control equipment and encode them to obtain binary data; A LoRa point-to-point communication module, used to modulate the binary data to obtain a LoRa signal, and transmit it to a DCS controller through a wireless channel; The data decoding module is used to decode the LoRa signal in the DCS controller to obtain the data of the field measurement equipment and control equipment.

[0028] Also includes: The star topology network communication module is used to modulate the binary data of each node to obtain the LoRa signal, and send it to the gateway through the wireless channel. The gateway transmits the LoRa signal of each node to the DCS controller.

[0029] Mesh networking communication module, used to modulate the binary data of the source node to obtain a LoRa signal, and send it to the routing link through a wireless channel. The routing link forwards the LoRa signal to the gateway, and the gateway transmits the LoRa signal to the DCS controller; The Mesh networking communication module is specifically used to send the LoRa signal of the long-distance node to the routing link through the wireless channel, and then transmit it to the DCS controller through the gateway; the LoRa signal of the short-distance node is directly sent to the gateway through the wireless signal, and transmitted to the DCS controller, and the source node includes the short-distance node and the long-distance node.

[0030] The division of modules in the embodiments of the present invention is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present invention may be integrated into one processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0031] This embodiment also provides a computer device, which includes a processor and a memory, the memory is used to store a computer program (in this embodiment, the computer program includes a computing component and an iterative component, which can perform model calculation and model update), the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function; the processor described in the embodiment of the present invention can be used for the operation of a wireless communication method of a DCS controller.

[0032] This embodiment also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device for storing programs and data. It can be understood that the computer-readable storage medium here can include both built-in storage media in the computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of a wireless communication method of a DCS controller in the above embodiment.

[0033] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0034] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0035] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1A function specified in one or more boxes.

[0036] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A wireless communication method for a DCS controller, characterized in that: The following steps are involved: After acquiring and encoding the data of field measurement equipment and control equipment, binary data is obtained; The binary data is modulated to obtain a LoRa signal, and transmitted to a DCS controller via a wireless channel; After decoding the LoRa signal in the DCS controller, the data of the field measurement equipment and control equipment are obtained.

2. A wireless communication method for a DCS controller according to claim 1, characterized in that: The step of modulating the binary data to obtain a LoRa signal and transmitting the signal to the DCS controller via a wireless channel specifically includes: The binary data of each node is modulated to obtain the LoRa signal, which is sent to the gateway through the wireless channel. The gateway transmits the LoRa signal of each node to the DCS controller.

3. A wireless communication method for a DCS controller according to claim 1, characterized in that: The step of modulating the binary data to obtain a LoRa signal and transmitting the signal to the DCS controller via a wireless channel specifically includes: The binary data of the source node is modulated to obtain a LoRa signal, and is sent to a routing link through a wireless channel. The routing link forwards the LoRa signal to a gateway, and the gateway transmits the LoRa signal to a DCS controller.

4. A wireless communication method for a DCS controller according to claim 3, characterized in that: The source nodes include short-distance nodes and long-distance nodes, and the LoRa signals of the long-distance nodes are sent to the routing link through the wireless channel and then transmitted to the DCS controller through the gateway; The LoRa signal of the short-range node is directly sent to the gateway via a wireless signal and transmitted to the DCS controller.

5. A wireless communication system for a DCS controller, characterized in that: include: The field measurement control data acquisition module is used to obtain the data of field measurement equipment and control equipment and encode them to obtain binary data; A LoRa point-to-point communication module, used to modulate the binary data to obtain a LoRa signal, and transmit it to a DCS controller through a wireless channel; The data decoding module is used to decode the LoRa signal in the DCS controller to obtain the data of the field measurement equipment and control equipment.

6. A wireless communication system for a DCS controller according to claim 5, characterized in that: Also includes: The star topology network communication module is used to modulate the binary data of each node to obtain the LoRa signal, and send it to the gateway through the wireless channel. The gateway transmits the LoRa signal of each node to the DCS controller.

7. A wireless communication system for a DCS controller according to claim 5, characterized in that: Also includes: The Mesh networking communication module is used to modulate the binary data of the source node to obtain a LoRa signal, and send it to the routing link through a wireless channel. The routing link forwards the LoRa signal to the gateway, and the gateway transmits the LoRa signal to the DCS controller.

8. A wireless communication system for a DCS controller according to claim 7, characterized in that: The Mesh networking communication module is specifically used to send the LoRa signal of the long-distance node to the routing link through the wireless channel, and then transmit it to the DCS controller through the gateway; the LoRa signal of the short-distance node is directly sent to the gateway through the wireless signal, and transmitted to the DCS controller, and the source node includes the short-distance node and the long-distance node.

9. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable in the processor, wherein the processor implements the steps of the wireless communication method of a DCS controller as claimed in any one of claims 1 to 4 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the wireless communication method of a DCS controller according to any one of claims 1 to 4 are implemented.

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