CN218848611U - Decentralized control system - Google Patents
Decentralized control system Download PDFInfo
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- CN218848611U CN218848611U CN202222262035.5U CN202222262035U CN218848611U CN 218848611 U CN218848611 U CN 218848611U CN 202222262035 U CN202222262035 U CN 202222262035U CN 218848611 U CN218848611 U CN 218848611U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The utility model provides a decentralization control system. The decentralized control system is used for controlling a plurality of field devices and comprises a main node module and at least one slave node module; the at least one slave node module forming a decentralized network, and each slave node module being coupled to the control terminal of a respective field device for control thereof; the master node module is configured to be communicatively connectable to at least one slave node module of the decentralized network; a remote control site is configured to be communicatively connectable to the master node module to control field devices over the decentralized network, and a field control site is connectable to the decentralized network to control field devices. The decentralized control system is high in safety redundancy, convenient to maintain, high in expandability and low in cost.
Description
Technical Field
The utility model relates to an equipment control technical field, concretely relates to decentralization control system.
Background
Fig. 1 illustrates a related art industrial control system using a Programmable Logic Controller (PLC). The programmable logic controller is a digital arithmetic operation electronic system specially designed for application in industrial environment, and bears the responsibility of linking the tasks of field device layer and information layer and the up-and-down transmission of instructions and data in industrial field. However, as shown in fig. 1, in an industrial control scenario using a PLC, each field device to be controlled is communicatively connected to the PLC located in the control chain center (or referred to as a previous layer) through a corresponding node (e.g., one of the nodes 1 to 6) coupled to the PLC at its control end, and then data of the corresponding node of each field device is collected and uploaded to a remote control terminal by the PLC, or an instruction from the remote control terminal is issued to the corresponding node of a target field device to control the field device by the node. In such industrial control scenario, the programmable logic controller as a hub in the control link occupies an important proportion, and once the programmable logic controller is damaged, the whole control system is broken down, which is not favorable for ensuring safety redundancy of the control process. Meanwhile, the strict hierarchical setting is not beneficial to the expandability and flexible arrangement of the whole control network and the field equipment, and especially, the field operator cannot conveniently check or debug the data of the field equipment after being far away from the remote control terminal.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problems in the prior art, the present invention provides a decentralized control system for controlling a plurality of field devices, wherein the decentralized control system comprises a master node module and at least one slave node module;
wherein each slave node module is coupled to a respective field device to enable control thereof;
each of the at least one slave node module and the master node module comprising a first communication module and a processing module for controlling the same, wherein the first communication module is configured to be capable of communicating with each other in accordance with control of the respective processing module such that the at least one slave node module constitutes a decentralized network and communicatively connects the master node module to at least one slave node module of the decentralized network; and
the master node module further includes a second communication module configured to be controllable by the corresponding processing module and communicatively connected to the remote control to issue control commands from the remote control to the corresponding field devices over the decentralized network.
In accordance with the decentralized control system of the present invention, preferably, each slave node module is configured to be connected directly to the master node module or to be connected to the master node module via at least one other slave node module in a relaying manner.
According to the decentralized control system of the present invention, preferably, the master node module and the at least one slave node module determine the connection order of the respective slave node modules in the decentralized network and the slave node modules directly connected to the master node module according to at least one of position, distance from each other, data flow load and communication connection quality.
According to the utility model discloses a decentralized control system, preferably, subordinate node module still includes the third communication module, the third communication module is configured to can be controlled with wireless and/or wired connection to the field control end by corresponding processing module, thereby by the field control end passes through decentralized network control field device.
According to decentralized control system, it is preferred, subordinate node module still includes human-computer interaction module, human-computer interaction module is configured to can realize field device passes through decentralized network and outside human-computer interaction.
According to the decentralized control system, preferably, processing module adopts the system-on-chip.
According to the utility model discloses a decentralized control system, it is preferred, first communication module adopts the Sub-G communication chip based on 802.14.5 wireless communication standard.
According to decentralized control system, it is preferred, second communication module adopts zigBee, wiFi, bluetooth, radio frequency identification or at least one in the NFC communication standard.
According to the decentralized control system of the present invention, preferably, the third communication module is configured to be the same as the second communication module.
According to decentralized control system, it is preferred, decentralized control system still includes the remote control end.
According to decentralized control system realized flat control network, therefore control system's safe redundancy is higher, the interconnect mode is more nimble, field device scalability promotes, maintains the convenience and promotes, cost reduction.
Drawings
Embodiments of the invention are further described with reference to the accompanying drawings, in which:
FIG. 1 illustrates a prior art industrial control system using a Programmable Logic Controller (PLC);
FIG. 2 illustrates a topological relationship of a first embodiment of a decentralized control system according to the present invention;
fig. 3 shows the structural relationship of the decentralized control system according to fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail by the following embodiments with reference to the accompanying drawings.
Fig. 2 shows a topological relation of a first embodiment of a decentralized control system according to the invention. The decentralized control system comprises a remote control end, a main node module and a plurality of slave node modules. The master node module and the slave node module may have similar structures, the master node module is composed of a processing unit (MCU), a first communication unit and a second communication unit, and the slave node module is composed of a processing unit, a first communication unit and a third communication unit. Wherein the first communication unit is configured to be able to communicate with a first communication unit of another apparatus (e.g. another slave node module); the second communication unit is configured to be able to communicate with the remote control terminal or other external control terminals. Thus, in a typical configuration scenario, the remote control of the decentralized control system is configured to communicate with the master node module, at least one of the plurality of slave node modules is capable of communicating with the master node module, and each slave node module is coupled to the control of a field device. Since each slave node module has the first communication unit, it is not necessary to connect each slave node module to the master node module to communicate therewith, but rather, each slave node module may be configured to be connected only to one or more slave node modules that are in close proximity thereto, thereby forming a decentralized network in which a plurality of slave node modules are relay-connected to one another, and thus communication of any two nodes is ensured without a central data connection point in the decentralized network. In this configuration mode, the master node module only needs to be connected to one or more slave node modules closest thereto, and data communication with any slave node module in the decentralized network can be achieved. The connection relationship of the decentralized network (i.e. which target slave node modules the slave node module is to be connected to) can be optimally configured by the processing unit of each slave node module according to the position and the mutual distance of the processing unit, the data flow load of other peripheral slave node modules and the quality of the communication quality of the connection between the slave node modules; or the connection relationship of the decentralized network may be pre-configured by the installer. As shown in fig. 2, the slave node modules (node 5, node 4 and node 3) are in sequential connection communication, wherein only node 3 is in connection communication with the master node module (node 6). For example, when a control person operating the remote control end desires to obtain first data from a first field device connected to the node 5, a first instruction issued by the remote control end (e.g., a mobile phone end connected to the node 6 shown in fig. 2) is transmitted to the master node module (node 6), the first instruction is transmitted to the slave node module node 5 through the slave node module node 3 and the node 4 in sequence, and then the node 5 obtains the first data according to the first instruction, transmits the first data to the master node module (node 6) through the slave node module node 4 and the node 3 in sequence, and transmits the first data back to the remote control end. For another example, when a controller operating the remote control end desires to control a second field device connected to the slave node module node 2 to switch from an operating state to an off state, since the slave node 2 is only communicatively connected to the slave node module node 1 and the node 1 is communicatively connected to the master node module (node 6), a second instruction of the remote control end is sequentially issued to the master node module (node 6), the slave node module node 1 and transmitted to the slave node module node 2, and the slave node module node 2 outputs a control signal to the control end of the second field device after receiving the second instruction and switches it off (optionally, reporting the operating state of the second field device to the remote control end after the switching off action is also included).
Although only the example of connecting the master node module (node 6) to nodes 1 and 2 is shown in fig. 2, and each slave node module is only connected to the other two node modules, the present invention is not intended to limit the number of other node modules connected to each master node module or slave node module, and each node module can connect a plurality of node modules nearby to form a safety redundancy of a data chain if allowed by the first communication module, and even if one of the communication connections is accidentally dropped, the first communication module is not affected to quickly switch to a communication connection with the first communication module of the other node module.
Further, still referring to fig. 2, the second communication unit of the master node module (node 6) has a wireless communication function, such as WiFi communication, configured to be able to receive a control instruction issued by an external controller (e.g., a central control system or a mobile phone terminal) and transmit it to the corresponding slave node module via the master node module, and to upload data received by the master node module (node 6) from the respective slave node modules (e.g., via a router) to the cloud storage.
The third communication unit of the slave node module has a wireless communication function and/or a wired local area network communication function, which is configured, for example, to be compatible with the common ethernet local area network communication standard or USB standard or wireless network standard (e.g., zigBee, wiFi) or near field communication (e.g., bluetooth, rfid, or NFC), so that when a field controller wishes to check or directly control a certain item of readable data of a target field device, the cumbersome connection path of a wirelessly connectable control terminal (e.g., mobile phone terminal) of a field person, a remote control terminal, a master node module, a target slave node module, and a target field device can be avoided, and the target field device connected to the target slave node module can be checked only by connecting the wirelessly connectable control terminal of the field person to the third communication unit of the target slave node module. In an illustrative example, the slave node module is integrated into a field device, and the third communication unit is an NFC unit disposed in a marked area on the housing of the field device that is visible or accessible to field personnel, so that when the control terminal supporting the NFC communication protocol is held close to the marked area by the field personnel, the slave node module can quickly transmit predetermined operation information of the field device to the control terminal for the field personnel to view or control.
Fig. 3 shows an embodiment of the structural relationship of the decentralized control system according to the invention as shown in fig. 2. The connections between the master node modules and the slave node modules are shown as being wireless connections and communicating, whereby the respective field devices can be freely placed within the wireless communication range (e.g., ranges of several meters, tens of meters, or hundreds of meters or even more) supported by the slave node modules of each other without worrying about inconveniences such as compact placement, small space, difficulty in moving, etc., caused by the control system and the field devices being connected by cables. For the large-scale production line and other fields, the flexibility of placing, configuring or upgrading field devices and the convenience of maintenance are undoubtedly increased.
In the example of the master node module shown in fig. 3, the processing unit MCU employs a system on chip (SOC chip) as a processing chip; the first communication unit adopts a Sub-G wireless communication chip based on the 802.14.5 wireless communication standard; the second communication unit adopts a wireless/Bluetooth communication module; the SOC chip of the master node module can send instructions or data to the SOC chip of the slave node module closest to the master node module through communication between the respective wireless communication chips. Through the wireless/bluetooth communication module, the SOC chip of the master node module can send data to or receive instructions from a remote control end (fig. 3 shows a mobile phone end application, which may also be a control center of a machine room, a building or a factory, etc.).
Each slave node module is arranged integrally in a respective field device, i.e. a Variable Frequency Drive (VFD). Those skilled in the art will appreciate that the variable frequency drive is merely exemplary and can be extended to any other field device having a control terminal. In the example of the slave node module, the processing unit adopts a system on chip (SOC chip) as a processing chip; the first communication unit adopts a Sub-G wireless communication chip based on the 802.14.5 wireless communication standard; the third communication unit adopts a wireless/Bluetooth communication module; the third communication unit further comprises an ethernet and/or USB communication module; the slave node module further comprises a touch screen human-computer interaction module. The SOC chip is respectively connected with and controls the wireless communication chip, the Ethernet and/or USB communication module, the wireless/Bluetooth communication module and the touch screen man-machine interaction module. The SOC chip is used for processing and identifying the received instruction or data and sending the received instruction or data to the outside through the wireless communication chip, the Ethernet and/or USB communication module, the wireless/Bluetooth communication module and the touch screen man-machine interaction module. The SOC chips of every two slave node modules realize communication through wireless data communication between the wireless communication chips connected with the SOC chips; the SOC chip of each slave node module is in wired communication with external upper computer software or mobile APP through an Ethernet and/or USB network communication module, or is in wireless communication with the upper computer software or the mobile APP through a wireless/Bluetooth communication module, or uploads data from the slave node module to a cloud storage through the wireless/Bluetooth communication module and an external router; the SOC chip of each slave node module is communicated with field control personnel through a touch screen man-machine interaction module; and the SOC chip of each slave node module realizes data communication with a corresponding variable-frequency driver by using the serial peripheral interface SPI of the SOC chip. The specific types of chips of the processing unit, the first communication unit, and the like shown in the present embodiment are only examples, and are not intended to limit the present invention. In view of the present disclosure, those skilled in the art will be able to easily know and use other chips with similar functions as alternatives to the present embodiment, without departing from the scope of the present disclosure.
In other variant embodiments, when the field devices do not need to be spaced far apart from each other, a wired communication mode may be used instead to increase stability or reduce cost.
The utility model discloses a go centralized control system and got rid of the PLC controller as the control network maincenter, the decentralized network who goes centralization has been found, the mode that each subordinate node module is connected nearby compresses the level of control network for the flattening control network, therefore control system's safe redundancy is higher, the interconnect mode is more nimble, wireless connection's decentralized network makes the connection simplification between each field device, mutual distance can not receive the cable restraint and adjust wantonly, scalability promotes. Meanwhile, field workers can be conveniently connected to the decentralized network by means of man-machine interaction or Ethernet and/or USB and wireless communication to debug the target field device, maintainability and maintainability are greatly improved, and cost is reduced. The decentralized control system can be widely applied to replacing PLC control systems in various light use scenes, such as control variable frequency drivers, soft switches, sensors, motor protectors, contactors or switch equipment used in scenes of airports, logistics, industrial 4.0 production and the like; and for example, the low-voltage product can be applied to photovoltaic power generation, energy management or battery management of an energy storage system or low-voltage products related to wind power generation, and related sensors and contactors.
Although the present invention has been described in connection with the preferred embodiments, it is not intended to limit the invention to the embodiments described herein, but rather, to include various changes and modifications without departing from the scope of the invention.
Claims (9)
1. A decentralized control system for controlling a plurality of field devices, wherein the decentralized control system comprises a master node module and at least one slave node module;
wherein each slave node module is coupled to a respective field device to enable control thereof;
each of the at least one slave node module and the master node module comprising a first communication module and a processing module for controlling the same, wherein the first communication module is configured to be capable of communicating with each other in accordance with control of the respective processing module such that the at least one slave node module constitutes a decentralized network and communicatively connects the master node module to at least one slave node module of the decentralized network; and
the master node module further includes a second communication module configured to be controllable by the corresponding processing module and communicatively connected to the remote control to issue control commands from the remote control to the corresponding field devices over the decentralized network.
2. The decentralized control system according to claim 1, wherein each slave node module is configured to be directly connected to the master node module or relay-connected to the master node module through at least one other slave node module.
3. The decentralized control system according to claim 1, wherein the slave node modules further comprise a third communication module configured to be controllable by the respective processing module for wireless and/or wired connection to a field control terminal for controlling the field devices by the field control terminal via the decentralized network.
4. The decentralized control system according to claim 3, wherein the slave node modules further comprise a human machine interaction module configured to enable human machine interaction of the field devices with an external world over the decentralized network.
5. The decentralized control system according to claim 1, wherein the processing module employs a system-on-a-chip.
6. The decentralized control system according to claim 1, wherein the first communication module employs a Sub-G wireless communication chip based on the 802.14.5 wireless communication standard.
7. The decentralized control system according to claim 1, wherein the second communication module employs at least one of ZigBee, wiFi, bluetooth, radio frequency identification or NFC communication standards.
8. The decentralized control system according to claim 4, wherein the third communication module is configured identical to the second communication module.
9. The decentralized control system according to any one of claims 1 to 8, wherein the decentralized control system further comprises the remote control terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222262035.5U CN218848611U (en) | 2022-08-26 | 2022-08-26 | Decentralized control system |
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| CN202222262035.5U CN218848611U (en) | 2022-08-26 | 2022-08-26 | Decentralized control system |
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| CN218848611U true CN218848611U (en) | 2023-04-11 |
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| CN202222262035.5U Active CN218848611U (en) | 2022-08-26 | 2022-08-26 | Decentralized control system |
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