CN112261151A - Decentralized distributed control system and deployment method thereof - Google Patents
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- G05B19/00—Programme-control systems
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- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
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Abstract
The system comprises a cloud platform, a wireless network base station in communication connection with the cloud platform, a first protocol conversion unit arranged at the edge of the network coverage range of the wireless network base station and in communication connection with the wireless network base station, a first wireless direct digital control unit arranged outside the network coverage range of the wireless network base station and in communication connection with the first protocol conversion unit, and a second wireless direct digital control unit arranged inside the network coverage range of the wireless network base station and in communication link with the wireless network base station. The method has the advantages of solving the problems that the wired monitoring system is high in cost and difficult to expand in the later stage and the main node is difficult to maintain under the condition of failure, and realizing the technical effects of constructing the monitoring system at low cost, facilitating later-stage expansion and quickly maintaining under the condition of failure.
Description
Technical Field
The application relates to the technical field of building automation control, in particular to a decentralized distributed control system and a deployment method thereof.
Background
In building automation deployment, building equipment monitoring is an important link. The building equipment monitoring mainly monitors the following equipment: refrigerating unit, air conditioning unit, fresh air unit, air supply and exhaust unit, heat pump unit, boiler, fan coil, elevator, illumination, hot water, sewage, energy consumption management. In addition, the areas monitored by the construction equipment mainly comprise a centralized underground machine room, a centralized aboveground machine room, a public area of each floor and an owner area.
In the related art, all solutions for monitoring the construction equipment are wired solutions, including RS 485-based Modbus communication, Ethernet-based BACnet (Ethernet), and the like.
For centralized underground machine rooms and centralized aboveground machine rooms, networking is generally performed in one or more hybrid modes, as shown in fig. 1, communication lines are pulled to the machine rooms, and then all devices are accessed through a switch (Ethernet) or RS485 bus connection, so that all the devices are ensured to be accessed to a building device monitoring system, and therefore all the devices are controlled.
As for the common area of each floor and the owner area, the networking mode is relatively complex, as shown in fig. 2, a floor switch (BACnet) or an RS 485-to-ethernet terminal is generally arranged on each floor, and then all devices of the whole floor are accessed one by one. When the number of the devices is large, a multi-layer network needs to be deployed, and all the devices can be ensured to be accessed to the building device monitoring system, so that all the devices can be controlled.
For the wired solution, relevant standards and implementation specifications are formed in construction, so that a communication system can reliably operate under normal conditions, however, the early construction cost and the later maintenance cost of the wired solution are high. For example, when part of the communication lines are damaged accidentally, or when building equipment needs to be added or adjusted due to modification, the construction is subject to high cost, complicated process and long construction period.
In addition, the building equipment monitoring system in the related art usually adopts a star network or a tree network, and all the equipment is finally connected to one or more computers to realize terminal control. However, when a central node of a star network or a root node of a tree network fails, all sub-devices below the node are in an unavailable state, most maintenance personnel are not very professional technicians, and the failure is solved with low efficiency and long time.
At present, no effective solution is provided for the problems that a wired monitoring system in the related technology is high in cost, difficult to expand in the later period and difficult to maintain under the condition that a main node fails.
Disclosure of Invention
The embodiment of the application provides a decentralized distributed control system and a deployment method thereof, and aims to at least solve the problems that a wired monitoring system in the related art is high in cost, difficult to expand in the later stage and difficult to maintain under the condition that a main node fails.
In a first aspect, an embodiment of the present application provides a decentralized distributed control system, which is applied to building automation control, and includes:
a cloud platform;
the wireless network base station is in communication connection with the cloud platform;
the first protocol conversion unit is arranged at the edge of the network coverage range of the wireless network base station and is in communication connection with the wireless network base station;
the first wireless direct digital control unit is arranged outside the network coverage range of the wireless network base station and is in communication connection with the first protocol conversion unit;
and the second wireless direct digital control unit is arranged in the network coverage range of the wireless network base station and is in communication connection with the wireless network base station.
In some of these embodiments, further comprising:
and the second protocol conversion unit is respectively in communication connection with the cloud platform, the first protocol conversion unit and the first wireless direct digital control unit, and is used for enabling the first wireless direct digital control unit to be in communication connection with the wireless network base station through the second protocol conversion unit under the condition that the first protocol conversion unit is in a fault.
In some embodiments, the number of the second protocol conversion units is several, several of the second protocol conversion units are respectively connected with the first protocol conversion unit in a communication manner, and several of the second protocol conversion units are connected in a communication manner;
the communication links between the second protocol conversion units and the first protocol conversion unit are in an awakening state, and the communication links between the second protocol conversion units are in a sleeping state;
and under the condition that the first protocol conversion unit is in fault, one second protocol conversion unit is in communication connection with the wireless network base station, communication links between the rest of second protocol conversion units and the second protocol conversion unit are switched to an awakening state by a sleep state, communication links between the rest of second protocol conversion units and the first protocol conversion unit are switched to a sleep state by an awakening state, and communication links between the rest of second protocol conversion units are still in the sleep state.
In some embodiments, the number of the first protocol conversion units is several, the number of the second protocol conversion units is several, and the number of the first wireless direct digital control units is several;
each first protocol conversion unit is in communication connection with at least one second protocol conversion unit, and each second protocol conversion unit is only in communication connection with one first protocol conversion unit; each first protocol conversion unit is in communication connection with at least one first wireless direct digital control unit, and each first wireless direct digital control unit is in communication connection with only one first wireless direct digital control unit.
In some embodiments, the number of the first wireless direct digital control units is several, and several of the first wireless direct digital control units are respectively connected with the first protocol conversion unit in a communication manner.
In some embodiments, the number of the first protocol conversion units is several, the number of the first rdcs is several, each of the first protocol conversion units is communicatively connected to at least one of the first rdcs, and each of the first rdcs is communicatively connected to only one of the first protocol conversion units.
In some of these embodiments, the first protocol conversion unit comprises:
the first protocol conversion unit is in communication connection with the wireless network base station through the first wireless communication module;
the first master control module is in communication connection with the first wireless communication module;
the first protocol conversion unit is in communication connection with the first wireless direct digital control unit through the second wireless communication module.
In some of these embodiments, the first wireless direct digital control unit comprises:
the first wireless direct digital control unit is in communication connection with the first protocol conversion unit through the third wireless communication module;
the second main control module is in communication connection with the third wireless communication module;
the first input interfaces are in communication connection with the second master control module;
the first output interfaces are in communication connection with the second master control module;
the first input interfaces correspond to the first output interfaces one to one.
In some of these embodiments, the second wireless direct digital control unit comprises:
the second wireless direct digital control unit is in communication connection with the wireless network base station through the fourth wireless communication module;
the third main control module is in communication connection with the fourth wireless communication module;
the second input interfaces are in communication connection with the third master control module;
the second output interfaces are in communication connection with the third master control module;
the second input interfaces correspond to the second output interfaces one to one.
In some of these embodiments, the transmission rate of the second wireless direct digital control unit is less than 1 Mbps; and/or
The transmission rate of the second wireless direct digital control unit is more than or equal to 1Mbps and less than 10 Mbps; and/or
And the transmission rate of the second wireless direct digital control unit is more than or equal to 10Mbps and less than 100 Mbps.
In a second aspect, an embodiment of the present application provides a method for deploying a decentralized distributed control system, which is applied to building automation control, and includes the following steps:
acquiring a network coverage range of a wireless network base station;
judging whether the building is in the network coverage area;
under the condition that the building is outside the network coverage area, arranging at least one first protocol conversion unit at the edge of the network coverage area, and arranging at least one first wireless direct digital control unit at the building, wherein the first protocol conversion unit is respectively in communication connection with the wireless network base station and the first wireless direct digital control unit;
and under the condition that the building is within the network coverage range, at least one second wireless direct digital control unit is arranged in the building, and the at least one second wireless direct digital control unit is in communication connection with the wireless network base station.
In some of these embodiments, in the case where the building is outside the network coverage, at least one first protocol conversion unit is located at the edge of the network coverage, and after the building is provided with at least one first wireless direct digital control unit, the method further comprises:
at least one second protocol conversion unit is arranged in the preset distance range of the first protocol conversion unit, and the second protocol conversion unit is respectively in communication connection with the first protocol conversion unit, the wireless network base station and the first wireless direct digital control unit;
and under the condition that the first protocol conversion unit is in fault, the second protocol conversion unit is switched with the first protocol conversion unit, and the first wireless direct digital control unit is in communication connection with the wireless network base station through the second protocol conversion unit.
Compared with the related art, the decentralized distributed control system and the deployment method provided by the embodiment of the application, through the cloud platform, wireless network base station with cloud platform communication connection, set up at the edge of wireless network base station's network coverage, and with wireless network base station communication connection's first protocol conversion unit, equipment is outside wireless network base station's network coverage, and with the first wireless direct digital control unit of protocol conversion unit communication connection, set up in the inside with wireless network base station's network coverage, and with the wireless network base station second wireless direct digital control unit of communication chain machine, the problem that wired monitoring system is with high costs, the later stage is difficult to expand and be difficult to maintain under the condition that the host node breaks down has been solved, the low-cost monitored control system that has been built, be convenient for later stage extension and the technological effect of carrying out the maintenance fast under the condition that breaks down have been realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of a Modbus networking according to the related art;
fig. 2 is a schematic diagram of BACnet networking according to the related art;
FIG. 3 is a block diagram of a distributed control system according to an embodiment of the present application;
FIG. 4 is a block diagram of the structure of a distributed control system according to an embodiment of the present application;
fig. 5 is a block diagram (iii) of the structure of a distributed control system according to an embodiment of the present application;
fig. 6 is a block diagram of a first protocol conversion unit according to an embodiment of the present application;
FIG. 7 is a block diagram of a first wireless direct digital control unit according to an embodiment of the present application;
FIG. 8 is a block diagram of a second wireless direct digital control unit according to an embodiment of the present application;
FIG. 9 is a flow chart of a method of deployment of a distributed control system according to an embodiment of the present application (one);
FIG. 10 is a flow chart of a method of deployment of a distributed control system according to an embodiment of the present application (two);
FIG. 11 is a schematic diagram of a specific implementation of a distributed control system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
Fig. 3 is a block diagram (one) of the structure of a distributed control system according to an embodiment of the present application. As shown in fig. 3, the distributed control system 300 includes:
the cloud platform 320 is in communication connection with the control terminal 310 and is used for acquiring a control signal transmitted by the control terminal 310 and transmitting a feedback signal to the control terminal 310;
the wireless network base station 330 is in communication connection with the cloud platform 320 and is used for receiving and sending wireless network signals;
the first protocol conversion unit 340 is disposed at an edge of a network coverage of the wireless network base station 330, and is in communication connection with the wireless network base station 330, and configured to improve the network coverage of the wireless network base station 330;
a first wireless direct digital control unit 350, disposed outside the network coverage of the wireless network base station 330, and communicatively connected to the first protocol conversion unit 340, for controlling devices outside the network coverage of the wireless network base station 330;
and a second wireless direct digital control unit 360, which is disposed inside the network coverage of the wireless network base station 330 and is in communication connection with the wireless network base station 330, for controlling devices located inside the network coverage of the wireless network base station 330.
In some embodiments, the control terminal 310 is a computer, a smart phone, a notebook computer, a tablet computer, or the like.
In some embodiments, the wireless network base station 330 may be a 4G wireless network base station, a 5G wireless network base station, and the wireless network base station 330 provides services related to installation, maintenance, and the like for a communication network operator.
In some embodiments, first protocol conversion unit 340 may be disposed inside the edge of the network coverage of wireless network base station 330, or disposed at the edge of the network coverage of wireless network base station 330.
Specifically, the network coverage of the wireless network base station 330 is taken as a circular range with a radius of n kilometers, where n is a positive number greater than 1. The distance between the first protocol conversion unit 340 and the wireless network base station 330 is [ n-0.5, n ], that is, the installation position of the first protocol conversion unit 340 is a circular ring range with an outer diameter of n kilometers and an inner diameter of n-0.5 kilometers.
Generally, if the wireless network base station 330 is a 4G wireless network base station, and the network coverage area is a circular area with a radius of 1 to 3 kilometers, the installation position of the first protocol conversion unit 340 is a circular area with an outer diameter of 1 to 3 kilometers and an inner diameter of 0.5 to 2.5 kilometers.
In some embodiments, the first protocol conversion unit 340 is a gateway, including but not limited to a 4G to LoRa gateway and a 5G to LoRa gateway.
In some embodiments, the first wireless direct digital control unit 350 is a direct digital controller using LoRa protocol, and the data transmission range is 2-8 km.
In some embodiments, the second wireless direct digital control unit 360 is a direct digital controller using a mobile communication protocol, such as a direct digital controller using a 2G communication protocol, a direct digital controller using a 3G communication protocol, a direct digital controller using a 4G communication protocol, a direct digital controller using a 5G communication protocol, and a direct digital controller using an internet of things communication protocol.
In particular, direct digital controllers supporting different communication protocols may be selected according to the data transmission and control requirements of different devices. If a device requiring high-speed data transmission is needed, the second wireless direct digital control unit 360 is a direct digital controller using a 4G communication protocol; if only a low-speed data transmission device is needed, the second wireless direct digital control unit 360 is a direct digital controller using a 2G communication protocol or a direct digital controller using a 4G cat.1 communication protocol; being a low power device, the second wireless direct digital control unit 360 is a direct digital controller using an internet of things communication protocol, such as a direct digital controller using an NBIoT communication protocol.
Accordingly, the transmission rate of the second wireless direct digital control unit 360 is less than 1Mbps, i.e., it uses the 2G communication protocol; the transmission rate of the second wireless direct digital control unit 360 is greater than or equal to 1Mbps and less than 10Mbps, i.e., it uses the 3G communication protocol; the transmission rate of the second wireless direct digital control unit 360 is greater than or equal to 10Mbps and less than 100Mbps, i.e., it uses the 4G communication protocol.
By the aid of the system, all equipment of the building equipment monitoring system is connected to the cloud platform in a wireless communication mode, cables (such as optical fibers) do not need to be arranged inside a building, and in the early construction process of the building, early construction amount is reduced, construction difficulty is reduced, and building cost is reduced; in the later maintenance process, under the condition that a certain device breaks down, only the device needs to be replaced, and the normal work of other devices is not influenced in the maintenance process; due to the adoption of distributed control, a central node or a root node does not exist, so that the problem that all equipment under the node cannot be used due to node failure does not occur; when the network has problems, the network operator only needs to send maintenance personnel for maintenance, so that the maintenance workload of the maintenance personnel is reduced, the maintenance difficulty of the maintenance personnel is reduced, the team scale of the maintenance personnel is reduced, and the related labor cost is reduced; in addition, different second wireless direct digital control units are selected according to different devices with different use requirements, the problem that the big horse pulls the trolley is solved, the work energy consumption of related working devices is reduced, and the running cost of a distributed control system is reduced.
Fig. 4 is a block diagram (ii) of the structure of the distributed control system according to the embodiment of the present application. As shown in fig. 4, the distributed control system 300 further includes:
the second protocol conversion unit 370 is disposed at the edge of the network coverage of the wireless network base station 330, is located inside the coverage of the first protocol conversion unit 340, and is in communication connection with the wireless network base station 330, the first protocol conversion unit 340, and the first wireless direct digital control unit 350, and is used for switching with the first protocol conversion unit 340 when the first protocol conversion unit 340 fails, so as to ensure that the first wireless direct digital control unit 350 connected with the first protocol conversion unit 340 performs normal data transmission and reception with the wireless network base station 330 in the maintenance process of the maintenance personnel.
Specifically, the second protocol conversion unit 370 and the first protocol conversion unit 340 form a protocol conversion unit cluster, that is, the first protocol conversion unit 340 is a master protocol conversion unit, the second protocol conversion unit 370 is a slave protocol conversion unit, and the first protocol conversion unit 340 and the second protocol conversion unit 350 can be switched with each other. The first protocol conversion unit 340 and the second protocol conversion unit 350 can perform data intercommunication, that is, when the first protocol conversion unit 340 performs data transmission, the related work information, work log, and the like are transmitted to the second protocol conversion unit 350 for storage, so that when the second protocol conversion unit 350 and the first protocol conversion unit 340 are switched, the second protocol conversion unit 350 does not need to be reconfigured, and the technical effect of seamless switching is achieved.
In some embodiments, the second protocol conversion unit 370 is disposed in an overlapping range of the network coverage of the first protocol conversion unit 340 and the network coverage of the wireless network base station 330.
Specifically, the network coverage of the wireless network base station 330 is taken as a circular range with a radius of n kilometers, and the network coverage of the first protocol conversion unit 340 is taken as a circular range with a radius of m kilometers, where n is a positive number greater than 1, and m is a positive number greater than 1. The distance between the first protocol conversion unit 340 and the wireless network base station 330 is [ n-0.5, n ], that is, the installation position of the first protocol conversion unit 340 is a circular ring range with an outer diameter of n kilometers and an inner diameter of n-0.5 kilometers; the installation position of the second protocol conversion unit 370 is an overlapping range of a circular range having an outer diameter of n kilometers and an inner diameter of n-0.5 kilometers and a circular range having a radius of m kilometers with the installation position of the first protocol conversion unit 340 as a center.
In some embodiments, the number of the second protocol conversion units 370 is several, that is, each first protocol conversion unit 340 and several second protocol conversion units 370 form a protocol conversion unit cluster, and each first protocol conversion unit 340 is not only communicatively connected with several second protocol conversion units 370, but also communicatively connected between several second protocol conversion units 370.
Specifically, under the condition that the first protocol conversion unit 340 works normally, the plurality of second protocol conversion units 370 are respectively in communication connection with the first protocol conversion unit 340, and communication links between the plurality of second protocol conversion units 370 are in a sleep state; when the first protocol conversion unit 340 is in a fault, a second protocol conversion unit 370 is switched with the first protocol conversion unit 340, communication links between the remaining second protocol conversion units 370 and the second protocol conversion unit 370 are in an awake state, communication links between the remaining second protocol conversion units 370 are still in a sleep state, and communication links between the remaining second protocol conversion units 370 and the first protocol conversion unit 340 are switched from the awake state to the sleep state. That is, in the case that one second protocol conversion unit 370 is in operation, the communication links between the remaining second protocol conversion units 370 and the second protocol conversion unit 370 are switched from the sleep state to the awake state, the communication links between the remaining second protocol conversion units 370 and the first protocol conversion unit 340 are switched from the awake state to the sleep state, and the communication links between the remaining second protocol conversion units 370 still maintain the sleep state.
Through the system, under the condition that the first protocol conversion unit fails, the first wireless direct digital control unit connected with the first protocol conversion unit can still carry out normal communication, the time for waiting for maintenance due to the failure is reduced, and the cloud platform is ensured to monitor the first wireless direct digital control unit outside the network coverage range of the wireless network base station in real time.
Fig. 5 is a block diagram (iii) of the structure of the distributed control system according to the embodiment of the present application. As shown in fig. 5, the distributed control system 300 includes a plurality of first wireless direct digital control units 350, and the plurality of first wireless direct digital control units 350 are respectively connected to the first protocol conversion unit 340 in a communication manner.
In this embodiment, one first protocol conversion unit 340 may be connected to a plurality of first wireless direct digital control units 350, so as to reduce the configuration cost and facilitate the later maintenance while ensuring smooth communication.
In some embodiments, the number of the first protocol conversion units 340 is several, and each of the first protocol conversion units 340 is in communication connection with a plurality of first wireless direct digital control units 350, so as to expand a coverage area and reduce configuration cost under the condition of ensuring smooth communication.
In some embodiments, at least one second protocol conversion unit 370 is disposed inside the network coverage area of each first protocol conversion unit 340, that is, each first protocol conversion unit 340 is connected to at least one second protocol conversion unit 370, and each second protocol conversion unit 370 is only in communication connection with one first protocol conversion unit 340, so as to form a plurality of protocol conversion unit clusters, and ensure that the distributed control system 300 is in a normal working state all the time.
Fig. 6 is a block diagram of a first protocol conversion unit according to an embodiment of the present application. As shown in fig. 6, the first protocol conversion unit 340 includes:
a first wireless communication module 341, communicatively connected to the wireless network base station 330, for enabling the first protocol conversion unit 340 to perform data transmission and reception with the wireless network base station 330;
a first main control module 342, communicatively connected to the first wireless communication module 341, for transmitting data to the first wireless communication module 341 and receiving data transmitted by the first wireless communication module 341;
the second wireless communication module 343 is communicatively connected to the first master control module 342, and is configured to transmit data to the first master control module 342 and receive data transmitted by the first master control module 342.
In some embodiments, the first wireless communication module 341 is a 4G communication module or a 5G communication module.
In some embodiments, the first master module 342 is a master circuit board, which includes at least a processor, a memory, a power source, and various electrical components (including but not limited to a voltage regulator, a voltage converter, and a voltage protector).
In some embodiments, the second wireless communication module 343 is a LoRa communication module, such as a LoRa communication module SX1301 large gateway digital baseband solution.
In some embodiments, the first wireless communication module 341 is detachably mounted on the first main control module 342, so that the first wireless communication module 341 can be replaced according to the communication protocol of the wireless network base station 330 without separately forming a mold, thereby reducing the production cost.
In some embodiments, the second wireless communication module 343 is detachably installed in the first main control module 342, so that the second wireless communication module 343 can be replaced according to the private network protocol without separately forming a mold, thereby reducing the production cost.
In addition, the structure of the second protocol conversion unit 370 is substantially the same as that of the first protocol conversion unit 340, and is not described herein again.
Fig. 7 is a block diagram of a first wireless direct digital control unit according to an embodiment of the present application. As shown in fig. 7, the first wireless direct digital control unit 350 includes:
a third wireless communication module 351, communicatively connected to the first protocol conversion unit 340, for enabling the first wireless direct digital control unit 350 and the first protocol conversion unit 340 to perform data transmission and reception;
the second master control module 352, communicatively connected to the third wireless communication module 351, is configured to transmit data to the third wireless communication module 351 and receive data transmitted by the third wireless communication module 351;
a plurality of first input interfaces 353, communicatively connected to the second master control module 352, for transmitting data to the second master control module 352;
the plurality of first output interfaces 354 are communicatively connected to the second master control module 352, and are configured to receive data transmitted by the second master control module 352, and the first output interfaces 354 correspond to the first input interfaces 353 one to one.
In some embodiments, the third wireless communication module 351 is a LoRa communication module, such as a LoRa communication module.
In some embodiments, the second master module 352 is a master circuit board, which includes at least a processor, a memory, a power supply, and various electrical components (including but not limited to a voltage regulator, a voltage converter, and a voltage protector).
In some of these embodiments, the first input interface 353 includes an analog signal input interface, a digital signal input interface.
In some of these embodiments, the first output interface 354 includes an analog signal output interface, a digital signal output interface.
In some embodiments, the third wireless communication module 351 is detachably installed in the second main control module 352, so that the third wireless communication module 351 can be replaced according to the private network protocol without separately forming a mold, thereby reducing the production cost.
Fig. 8 is a block diagram of a second wireless direct digital control unit according to an embodiment of the present application. As shown in fig. 7, the second wireless direct digital control unit 360 includes:
a fourth wireless communication module 361, communicatively connected to the wireless network base station 330, for enabling the second wireless direct digital control unit 350 to perform data transmission and reception with the wireless network base station 330;
a third main control module 362 communicatively connected to the fourth wireless communication module 361, and configured to transmit data to the fourth wireless communication module 361 and receive data transmitted by the fourth wireless communication module 361;
a plurality of second input interfaces 363, communicatively connected to the third main control module 362, for transmitting data to the third main control module 362;
a plurality of second output interfaces 364, communicatively connected to the third main control module 362, for receiving the data transmitted by the third main control module 362, wherein the second output interfaces 364 correspond to the second input interfaces 363 one to one.
In some embodiments, the fourth wireless communication module 361 is an NBIoT communication module, a 2G communication module, a 3G communication module, a 4G communication module, or a 5G communication module.
In some embodiments, the third main control module 362 is a main control circuit board, which includes at least a processor, a memory, a power supply, and various electrical components (including but not limited to a voltage regulator, a voltage converter, and a voltage protector).
In some embodiments, the second input interface 363 comprises an analog signal input interface, a digital signal input interface.
In some of these embodiments, the second output interface 364 includes an analog signal output interface, a digital signal output interface.
In some embodiments, the fourth wireless communication module 361 is detachably installed in the third main control module 362, so that the fourth wireless communication module 361 can be replaced according to the private network protocol without separately forming a mold, thereby reducing the production cost.
Fig. 9 is a flowchart (one) of a deployment method of a distributed control system according to an embodiment of the present application. As shown in fig. 9, the deployment method of the distributed control system includes:
step S902, acquiring a network coverage range of a wireless network base station;
step S904, judging whether the building is in a network coverage area;
step S906, under the condition that the building is outside the network coverage area, arranging at least one first protocol conversion unit at the edge of the network coverage area, and arranging at least one first wireless direct digital control unit at the building, wherein the first protocol conversion unit is respectively in communication connection with the wireless network base station and the first wireless direct digital control unit;
step S908, if the building is within the network coverage area, at least one second wireless direct digital control unit is installed in the building, and the at least one second wireless direct digital control unit is in communication connection with the wireless network base station.
Through the steps, whether the first protocol conversion unit and the first wireless direct digital control unit are arranged and where the first protocol conversion unit is arranged can be determined according to the network coverage range of the wireless network base station and the position of the building, so that the configuration of the building equipment monitoring system can be rapidly carried out, and the construction cost can be reduced.
Fig. 10 is a flowchart (ii) of a deployment method of a distributed control system according to an embodiment of the present application. As shown in fig. 10, in the case that the building is outside the network coverage, after at least one first protocol conversion unit is disposed at the edge of the network coverage and at least one first wireless direct digital control unit is disposed at the building, and the first protocol conversion unit is respectively communicatively connected to the wireless network base station and the first wireless direct digital control unit, the deployment method further includes:
step S1002, at least one second protocol conversion unit is arranged in a preset distance range of the first protocol conversion unit, and the second protocol conversion unit is respectively in communication connection with the first protocol conversion unit, the wireless network base station and the first wireless direct digital control unit;
step S1004, under the condition that the first protocol conversion unit is in failure, the second protocol conversion unit switches with the first protocol conversion unit, and the first wireless direct digital control unit is in communication connection with the wireless network base station through the second protocol conversion unit.
Through the steps, the first wireless direct digital control unit connected with the first protocol conversion unit can still carry out normal communication under the condition that the first protocol conversion unit fails, the time for waiting for maintenance due to the failure is shortened, and the cloud platform is ensured to monitor the first wireless direct digital control unit outside the network coverage range of the wireless network base station in real time.
FIG. 11 is a schematic diagram of a specific implementation of a distributed control system according to an embodiment of the present application. As shown in fig. 11, the distributed control system includes a connection platform (cloud platform 320), a carrier network (wireless network base station 330), a 4G to LoRa gateway (first protocol conversion unit 340), a DDC (direct Digital control) controller (first wireless direct Digital control unit 350) using LoRa communication protocol, a DDC controller (second wireless direct Digital control unit 360) using 4G cat.1 communication protocol or 2G communication protocol, and a DDC controller (second wireless direct Digital control unit 360) using NBIoT communication protocol.
The 4G-to-LoRa gateway can support simultaneous control of more than 100 sub-nodes, and a SemTech SX1301 Lora large-scale gateway digital baseband chip is used, so that 8 channels can be divided to work simultaneously, and the number of nodes in the network is effectively increased. In addition, with the LoRa scheme that only supports a single channel in the related art, network collision is effectively reduced, and gateway performance is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A decentralized distributed control system for building automation control, comprising:
a cloud platform;
the wireless network base station is in communication connection with the cloud platform;
the first protocol conversion unit is arranged at the edge of the network coverage range of the wireless network base station and is in communication connection with the wireless network base station;
the first wireless direct digital control unit is arranged outside the network coverage range of the wireless network base station and is in communication connection with the first protocol conversion unit;
and the second wireless direct digital control unit is arranged in the network coverage range of the wireless network base station and is in communication connection with the wireless network base station.
2. The decentralized distributed control system according to claim 1, further comprising:
and the second protocol conversion unit is respectively in communication connection with the cloud platform, the first protocol conversion unit and the first wireless direct digital control unit, and is used for enabling the first wireless direct digital control unit to be in communication connection with the wireless network base station through the second protocol conversion unit under the condition that the first protocol conversion unit is in a fault.
3. The decentralized distributed control system according to claim 1, wherein said first rdcs are a plurality of said first rdcs, and a plurality of said first rdcs are respectively communicatively connected to said first protocol conversion unit.
4. The decentralized distributed control system according to claim 1, wherein said first protocol conversion units are a plurality of said first rdcs, each of said first protocol conversion units is communicatively connected to at least one of said first rdcs, and each of said first rdcs is communicatively connected to only one of said first protocol conversion units.
5. The decentralized distributed control system according to claim 1, wherein said first protocol conversion unit comprises:
the first protocol conversion unit is in communication connection with the wireless network base station through the first wireless communication module;
the first master control module is in communication connection with the first wireless communication module;
the first protocol conversion unit is in communication connection with the first wireless direct digital control unit through the second wireless communication module.
6. The decentralized distributed control system according to claim 1, wherein said first wireless direct digital control unit comprises:
the first wireless direct digital control unit is in communication connection with the first protocol conversion unit through the third wireless communication module;
the second main control module is in communication connection with the third wireless communication module;
the first input interfaces are in communication connection with the second master control module;
the first output interfaces are in communication connection with the second master control module;
the first input interfaces correspond to the first output interfaces one to one.
7. The decentralized distributed control system according to claim 1, wherein said second wireless direct digital control unit comprises:
the second wireless direct digital control unit is in communication connection with the wireless network base station through the fourth wireless communication module;
the third main control module is in communication connection with the fourth wireless communication module;
the second input interfaces are in communication connection with the third master control module;
the second output interfaces are in communication connection with the third master control module;
the second input interfaces correspond to the second output interfaces one to one.
8. The decentralized distributed control system according to claim 1, wherein the transmission rate of said second wireless direct digital control unit is less than 1 Mbps; and/or
The transmission rate of the second wireless direct digital control unit is more than or equal to 1Mbps and less than 10 Mbps; and/or
And the transmission rate of the second wireless direct digital control unit is more than or equal to 10Mbps and less than 100 Mbps.
9. A decentralized distributed control system deployment method is applied to building automation control and is characterized by comprising the following steps:
acquiring a network coverage range of a wireless network base station;
judging whether the building is in the network coverage area;
under the condition that the building is outside the network coverage area, arranging at least one first protocol conversion unit at the edge of the network coverage area, and arranging at least one first wireless direct digital control unit at the building, wherein the first protocol conversion unit is respectively in communication connection with the wireless network base station and the first wireless direct digital control unit;
and under the condition that the building is within the network coverage range, at least one second wireless direct digital control unit is arranged in the building, and the at least one second wireless direct digital control unit is in communication connection with the wireless network base station.
10. The method of claim 9, wherein in the case where the building is outside the network coverage area, at least one first protocol conversion unit is located at an edge of the network coverage area, and after the building is provided with at least one first wireless direct digital control unit, the method further comprises:
at least one second protocol conversion unit is arranged in the preset distance range of the first protocol conversion unit, and the second protocol conversion unit is respectively in communication connection with the first protocol conversion unit, the wireless network base station and the first wireless direct digital control unit;
and under the condition that the first protocol conversion unit is in fault, the second protocol conversion unit is switched with the first protocol conversion unit, and the first wireless direct digital control unit is in communication connection with the wireless network base station through the second protocol conversion unit.
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