CN113543058A - Dust monitoring and processing system based on Wi-Fi Mesh - Google Patents
Dust monitoring and processing system based on Wi-Fi Mesh Download PDFInfo
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- CN113543058A CN113543058A CN202110576973.XA CN202110576973A CN113543058A CN 113543058 A CN113543058 A CN 113543058A CN 202110576973 A CN202110576973 A CN 202110576973A CN 113543058 A CN113543058 A CN 113543058A
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- 239000000428 dust Substances 0.000 title claims abstract description 84
- 238000012545 processing Methods 0.000 title claims abstract description 53
- 238000012544 monitoring process Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 description 7
- 230000006855 networking Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 206010033799 Paralysis Diseases 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/20—Arrangements in telecontrol or telemetry systems using a distributed architecture
- H04Q2209/25—Arrangements in telecontrol or telemetry systems using a distributed architecture using a mesh network, e.g. a public urban network such as public lighting, bus stops or traffic lights
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
Abstract
The invention discloses a dust monitoring and processing system based on Wi-Fi Mesh, which comprises a plurality of dust monitoring and processing devices, wherein each dust monitoring and processing device is defined as a node, one of the nodes is selected as a root node, part of the nodes are selected as father nodes, and the rest of the nodes are leaf nodes to form a network; when a certain node does not work or fails, if the node is a root node, electing a new root node; if the node is a father node, the child node of the node is disconnected with the node, and a new father node is searched to form connection, so that a new network is formed. The invention can prevent the whole system from being broken down due to the failure of a certain node and has strong working stability.
Description
Technical Field
The invention belongs to the technical field of dust monitoring, and particularly relates to a dust monitoring and processing system based on Wi-Fi Mesh.
Background
In recent years, the development of intelligent sensors and wireless communication technology promotes the integration of online dust monitoring and processing. The distribution network mode of the wireless sensor network comprises WLAN, Bluetooth and the like. Among other things, conventional Wi-Fi networks have the disadvantage of limited coverage area due to the requirement that each station must be within range to directly connect with an AP. Furthermore, conventional Wi-Fi networks are prone to overload, as the maximum number of stations allowed in the network is limited by the capacity of the AP. Bluetooth technology has limited transmission distance and is slow. In order to complete a high-performance wireless dust detection processing device, the problems that a wireless sensor network is limited in coverage area, low in transmission speed and easy to overload are solved.
Disclosure of Invention
Aiming at the problems, the invention provides a dust monitoring and processing system based on Wi-Fi Mesh, which can prevent the whole system from being paralyzed due to the fault of a certain node and has strong working stability.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
a Wi-Fi Mesh-based dust monitoring processing system, comprising: the dust monitoring and processing devices are defined as one node, one node is selected as a root node, part of nodes are used as father nodes, and the rest of nodes are leaf nodes to form a network;
when a certain node does not work or fails, if the node is a root node, electing a new root node; if the node is a father node, the child node of the node is disconnected with the node, and a new father node is searched to form connection, so that a new network is formed.
Optionally, each monitoring processing device includes: control unit, dust monitoring unit, touch display and processing unit:
the control unit comprises a control chip and a Wi-Fi wireless transceiver chip which are connected;
the dust monitoring unit is connected with the control chip and sends the monitored dust concentration to the control chip;
the touch display is connected with the control chip and used for displaying a real-time value of the dust concentration, setting a threshold value of the dust concentration and sending the threshold value to the control chip;
and the processing unit is connected with the control chip and performs corresponding processing work based on the sending signal of the control chip.
Optionally, the processing unit comprises an air source and a duct which are connected, and when the dust monitoring unit monitors that the dust concentration in the air exceeds a threshold value, the control chip controls the air source to discharge the dust through the duct.
Optionally, the air source is an exhaust fan.
Optionally, the control chip is an STM32F103ZET6 chip; the dust monitoring unit is a dust sensor, and a GP2Y1010AU0F dust sensor is selected; the touch display is a 4.3 inch capacitive touch screen.
Optionally, the method for determining the root node includes the following steps:
and determining a root node in a designated mode during the configuration of the dust monitoring and processing system.
Optionally, the method for determining the root node includes the following steps:
and dynamically selecting and determining the root node according to the signal strength between each node and the router.
Optionally, the dynamically selecting to determine the root node according to the signal strength between each node and the router specifically includes the following steps:
each idle node sends its own MAC address and router RSSI value through a Wi-Fi beacon frame, wherein the MAC address represents the only node in the network, and the router RSSI value represents the signal strength relative to the router;
each node simultaneously scans beacon frames from other idle nodes, and if the node detects a beacon frame with router RSSI (received signal strength indicator) with a value larger than that of the node, the node starts to transmit the content of the beacon frame, namely voting; selecting the beacon frame with the strongest router RSSI value through the minimum iteration times; and after the preset iteration times are reached, each node independently checks the ticket obtaining percentage, and if the ticket obtaining percentage of the node is greater than a preset threshold value, the node is a root node.
Optionally, the method for forming the network includes the following steps:
when a node is selected as a root node, the node and the router form uplink connection;
after the root node is connected to the router, idle nodes in the range of the root node are connected with the root node, so that a second layer of the network is formed, and the nodes of the second layer are father nodes;
and connecting the rest idle nodes with the corresponding father nodes within the range to form a new layer, wherein after the connection, the idle nodes become intermediate father nodes or leaf nodes, and the number of the allowed maximum layers of the network is determined by the user until no idle nodes exist in the network or the maximum allowed layer of the network is reached.
Alternatively, when the maximum number of layers allowed by the network is set, the nodes on the maximum layer automatically become leaf nodes.
Compared with the prior art, the invention has the beneficial effects that:
the dust monitoring and processing system comprises a plurality of dust monitoring and processing devices, wherein each dust monitoring and processing device is defined as a node, and when a certain node does not work any more or fails, if the node is a root node, new root node election can be carried out; if the node is an intermediate father node, the child nodes of the node are disconnected with the node, and a new father node is searched to form connection, namely a new network is formed, so that the whole system can not be paralyzed due to the fault of a certain node, and the working stability is greatly enhanced.
In addition, the invention can realize quick response, can detect and process dust in real time, is simple to operate and only needs to be electrified by a user.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic perspective view of a dust monitoring and processing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of Wi-Fi Mesh networking in the present invention;
in the figure:
1. the device comprises a guide pipe, 2 an air source, 3 a lead, 4 a control unit, 5 a touch display and 6 a dust monitoring unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
As shown in fig. 1-2, the present invention provides a dust monitoring and processing system based on Wi-Fi Mesh, comprising: the dust monitoring and processing devices are defined as one node, one node is selected as a root node, part of nodes are used as father nodes, and the rest of nodes are leaf nodes to form a network;
when a certain node does not work or fails, if the node is a root node, electing a new root node; if the node is a father node, the child node of the node is disconnected with the node, and a new father node is searched to form connection to form a new network, so that networking by adopting a Wi-Fi Mesh network is realized.
Therefore, the method and the device use a Wi-Fi Mesh for networking, which is different from the traditional Wi-Fi and Bluetooth networking modes, and a user can observe the dust concentration, modify the dust alarm threshold concentration and perform dust removal operation through a cloud platform.
As shown in fig. 1, in a specific implementation manner of the embodiment of the present invention, each monitoring processing device includes: the device comprises a control unit 4, a dust monitoring unit 6, a touch display 5 and a processing unit;
the control unit 4 comprises a control chip and a Wi-Fi wireless transceiver chip which are connected; in a specific implementation process, the control chip can be an STM32F103ZET6 chip;
the dust monitoring unit 6 is connected with the control chip and sends the monitored dust concentration to the control chip; in a specific implementation process, the dust monitoring unit 6 is a dust sensor, and a GP2Y1010AU0F dust sensor is selected; the dust sensor adopts a light scattering method to measure the flash frequency and duration of particle reflection in the air flow;
the touch display 5 is connected with the control chip through a wire 3, provides a human-computer interaction interface, is used for displaying a real-time value of dust concentration, sets a threshold value of the dust concentration and sends the threshold value to the control chip; in a specific implementation process, the touch display 5 is a 4.3-inch capacitive touch screen.
The processing unit is connected with the control chip and performs corresponding processing work based on a sending signal of the control chip; in the actual use process, the processing unit comprises an air source 2 and a guide pipe 1 which are connected, and when the dust monitoring unit 6 monitors that the dust concentration in the air exceeds a threshold value, the control chip controls the air source 2 to discharge the dust through the guide pipe 1. The air source 2 can be an exhaust fan with 30CM by 30CM, and other devices which can be matched with the guide pipe 1 to realize dust exhaust can be selected. The catheter 1 can be a plastic catheter 1, so that the price is low and the flexibility is good;
based on the design, the dust concentration can be measured, and the measurement error is less than 5%; and displaying the measured dust concentration on a display screen; when the dust concentration exceeds a set threshold value, dust treatment is carried out, and the threshold value concentration can be adjusted; when a node is disconnected, the network can be quickly re-established, and the robustness is good.
In a specific embodiment of the present invention, the method for determining the root node includes the following steps:
and determining a root node in a designated mode during the configuration of the dust monitoring and processing system.
In another specific embodiment of the present invention, the method for determining the root node includes the following steps:
the method comprises the following steps of dynamically selecting and determining a root node according to the signal strength between each node and a router, namely an automatic mode, wherein the selection of the root node depends on the signal strength relative to the router in the automatic mode:
each idle node sends its own MAC address and router RSSI value through a Wi-Fi beacon frame, wherein the MAC address represents the only node in the network, and the router RSSI value represents the signal strength relative to the router;
each node simultaneously scans beacon frames from other idle nodes, and if the node detects a beacon frame with router RSSI (received signal strength indicator) with a value larger than that of the node, the node starts to transmit the content of the beacon frame (which is equivalent to voting for the node); selecting the beacon frame with the strongest router RSSI value through the minimum iteration times; after the preset iteration times are reached (the preset iteration times can be set, 10 times are defaulted, other times can be selected, and the actual requirement can be seen), each node independently checks the ticket obtaining percentage (the ticket obtaining number/the total ticket number), and if the ticket obtaining percentage of the node is larger than the preset threshold value (the default number is 90%, other values can also be selected according to the actual requirement), the node is the root node. Upon selection, the root node will connect with the router and begin allowing downstream connections to be formed.
In a specific embodiment of the present invention, the method for forming the network includes the following steps:
when a node is selected as a root node, the node and the router form uplink connection;
after the root node is connected to the router, idle nodes in the range of the root node are connected with the root node, so that a second layer of the network is formed, and the nodes of the second layer are father nodes;
and connecting the rest idle nodes with the corresponding father nodes within the range to form a new layer, wherein after the connection, the idle nodes become intermediate father nodes or leaf nodes, and the number of the allowed maximum layers of the network is determined by the user until no idle nodes exist in the network or the maximum allowed layer of the network is reached.
When the maximum number of layers allowed by the network is set, the nodes on the maximum layer automatically become leaf nodes;
the network formation process of the present invention is described in detail below with reference to a specific implementation.
As shown in fig. 2, when node a is selected as the root node, it is called a communication terminal, and the communication terminal forms an upstream connection with the router. After the root node is connected to the router, free nodes within the range of the root node will begin to connect with the root node, thereby forming a second layer of the network. After connection, the second tier node will become the parent node (assuming maximum allowed tier >2) and will therefore form the next tier. As shown in fig. 2, the dust monitoring processing devices B and C are located within the range of the root node. Therefore, the dust monitoring processing devices B and C form an upstream connection with the communication device and become a parent node. And step three, forming a residual layer. The remaining free nodes will be in range to connect with the parent node, forming a new layer in the network. After connection, the free node will become an intermediate parent or leaf node, depending on the maximum number of layers allowed in the network set by the user. Until there are no more idle nodes in the network or the maximum allowed level of the network is reached. As shown in FIG. 2, the dust monitoring and processing devices E/F/G are respectively connected with the dust monitoring and processing devices B/C/D and become father nodes. In order to prevent the network from exceeding the maximum number of layers allowed, the nodes on the maximum layer will automatically become leaf nodes once connected, which prevents any other free nodes from connecting with leaf nodes, thereby preventing the formation of new layer patterns and realizing the limitation of tree depth. However, if the idle node has no other potential parent, it will remain idle indefinitely. As shown in fig. 2, the maximum allowable layer of the network is set to four layers. Therefore, when the dust monitoring processing device H is connected, it will become a leaf node to prevent any downstream connection from forming.
In conclusion, the invention uses a high-performance networking mode (Wi-Fi Mesh), is a multi-hop broadband wireless network structure with self-organization and self-healing characteristics, and realizes the integration of the dust online detection and treatment device. Each dust detection and processing node of the invention uses the high-capacity and high-speed distributed network, so that each node in the network can send and receive signals, and the detection and processing coverage area of the device is greatly increased. When a certain node in the invention does not work or fails any more, if the node is a root node, new root node election is carried out; if the node is an intermediate father node, the child node of the node is disconnected with the node, and a new father node is searched to form connection, namely the device forms a new network, the whole device cannot be broken down due to the failure of a certain node, and the working stability of the invention is greatly enhanced. In addition, the invention has quick response and can detect and process dust in real time; the operation is simple, and the user only needs to carry out power-on operation.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A Wi-Fi Mesh-based dust monitoring and processing system, comprising: the dust monitoring and processing devices are defined as one node, one node is selected as a root node, part of nodes are used as father nodes, and the rest of nodes are leaf nodes to form a network;
when a certain node does not work or fails, if the node is a root node, electing a new root node; if the node is a father node, the child node of the node is disconnected with the node, and a new father node is searched to form connection, so that a new network is formed.
2. The Wi-Fi Mesh-based dust monitoring and processing system of claim 1, wherein: each monitoring and processing device comprises: control unit, dust monitoring unit, touch display and processing unit:
the control unit comprises a control chip and a Wi-Fi wireless transceiver chip which are connected;
the dust monitoring unit is connected with the control chip and sends the monitored dust concentration to the control chip; the touch display is connected with the control chip and used for displaying a real-time value of the dust concentration, setting a threshold value of the dust concentration and sending the threshold value to the control chip;
and the processing unit is connected with the control chip and performs corresponding processing work based on the sending signal of the control chip.
3. The Wi-Fi Mesh-based dust monitoring and processing system of claim 2, wherein: the processing unit comprises an air source and a guide pipe which are connected, and when the dust monitoring unit monitors that the dust concentration in the air exceeds a threshold value, the control chip controls the air source to discharge the dust through the guide pipe.
4. The Wi-Fi Mesh-based dust monitoring and processing system of claim 3, wherein: the air source is an exhaust fan.
5. The Wi-Fi Mesh-based dust monitoring and processing system of claim 2, wherein: the control chip is an STM32F103ZET6 chip; the dust monitoring unit is a dust sensor, and a GP2Y1010AU0F dust sensor is selected; the touch display is a 4.3 inch capacitive touch screen.
6. The Wi-Fi Mesh-based dust monitoring and processing system of claim 1, wherein: the method for determining the root node comprises the following steps:
and determining a root node in a designated mode during the configuration of the dust monitoring and processing system.
7. The Wi-Fi Mesh-based dust monitoring and processing system of claim 1, wherein: the method for determining the root node comprises the following steps:
and dynamically selecting and determining the root node according to the signal strength between each node and the router.
8. The Wi-Fi Mesh-based dust monitoring and processing system according to claim 7, wherein the dynamically selecting and determining a root node according to the signal strength between each node and the router specifically comprises:
each idle node sends its own MAC address and router RSSI value through a Wi-Fi beacon frame, wherein the MAC address represents the only node in the network, and the router RSSI value represents the signal strength relative to the router;
each node simultaneously scans beacon frames from other idle nodes, and if the node detects a beacon frame with router RSSI (received signal strength indicator) with a value larger than that of the node, the node starts to transmit the content of the beacon frame, namely voting; selecting the beacon frame with the strongest router RSSI value through the minimum iteration times; and after the preset iteration times are reached, each node independently checks the ticket obtaining percentage, and if the ticket obtaining percentage of the node is greater than a preset threshold value, the node is a root node.
9. The Wi-Fi Mesh-based dust monitoring and processing system of claim 1, wherein the network is formed by a method comprising:
when a node is selected as a root node, the node and the router form uplink connection;
after the root node is connected to the router, idle nodes in the range of the root node are connected with the root node, so that a second layer of the network is formed, and the nodes of the second layer are father nodes;
and connecting the rest idle nodes with the corresponding father nodes within the range to form a new layer, wherein after the connection, the idle nodes become intermediate father nodes or leaf nodes, and the number of the allowed maximum layers of the network is determined by the user until no idle nodes exist in the network or the maximum allowed layer of the network is reached.
10. The Wi-Fi Mesh-based dust monitoring and processing system of claim 9, wherein when the maximum number of layers allowed in the network is set, the nodes on the maximum layer automatically become leaf nodes.
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| CN111866897A (en) * | 2020-07-30 | 2020-10-30 | 宁波奥克斯电气股份有限公司 | Networking method of intelligent home system and intelligent home system |
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- 2021-05-26 CN CN202110576973.XA patent/CN113543058A/en active Pending
Patent Citations (5)
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| CN104569311A (en) * | 2014-12-31 | 2015-04-29 | 北京工业大学 | Novel hierarchical heterogeneous cross-network air quality real-time monitoring model |
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