CN107302402A - A kind of wisdom power plant wireless messages monitoring system and method based on sound communication - Google Patents
A kind of wisdom power plant wireless messages monitoring system and method based on sound communication Download PDFInfo
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- CN107302402A CN107302402A CN201710483961.6A CN201710483961A CN107302402A CN 107302402 A CN107302402 A CN 107302402A CN 201710483961 A CN201710483961 A CN 201710483961A CN 107302402 A CN107302402 A CN 107302402A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/02—Non-electrical signal transmission systems, e.g. optical systems using infrasonic, sonic or ultrasonic waves
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
- H04W40/248—Connectivity information update
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses wireless sensor network and a kind of the wisdom power plant wireless messages monitoring system and method based on sound communication of internet of things field, wireless data transmission is realized using audio technology, 16kHz 22kHz sound frequency ranges are divided into 6 communication channels, using linear frequency modulation by the way of amplitude-shift keying ASK is combined, the acoustic wireless communication of 600bit/s speed within 20 meters of sighting distance is realized；Each node is sent data to server by the wireless network by aggregation node setting up wireless networks, and in the way of time division multiple acess TDMA；Each node in aggregation node periodicity inspection net, to add new node and exit failure node in time.Each node obtains local ident and TDMA sequential by aggregation node；Each node enters row clock synchronization and ranging by TPSN principles, and carries out optimum routing protocol planning according to channel status and range information；Each sensor information sends data to server by the wireless network；Server carries out data display to each node.
Description
Technical field
The present invention relates to wireless sensor network and internet of things field, specially a kind of wisdom electricity based on sound communication
Factory's wireless messages monitoring system and method.
Background technology
Internet of Things is digitized description to the material world by cognition technology, and enters using wireless network the biography of row information
Defeated and processing, has breakthrough application real in various fields such as environmental monitoring, track traffic, medical treatment and nursing, industrial productions
Example.In order to improve production and the operation safety of power plant, the parameter and ambient parameter of equipment are entered by Internet of Things monitoring platform
Row monitoring in real time, is application of the technology of Internet of things under power station environment, is also the important practice of wisdom power plant and industry 4.0.Mesh
The industrial data collection of preceding most domestic power plant is acquired and transmitted by the way of industrial bus, is disposably to apply
Work, its scalability is relatively low.Therefore the data transfer for being collected industry spot by wireless sensor network is to overall control center,
The Internet of Things information monitoring system of wisdom power plant is realized, most basic data supporting is provided to produce and dispatching.
The electromagnetic environment of power station environment is complex, the radiation of electric equipment products extraneous electromagnetic, between internal component, subsystem
Between crosstalk between each Transfer pipe, interference and destruction can be produced to electric equipment products and its data message.Pass through radio communication
Technology realizes power plant's Internet of Things information monitoring system so that industry spot is simple for structure, extension is flexible.But, radio communication skill
There is incompatibility in art, there is the interference that intercouples, this is due to power station environment：
(1) interference of the strong electromagnetic radiation of power station environment to radio communication so that the data transfer chain based on radio communication
Road reliability is poor, is easily disturbed and influences the speed and distance of radio communication；
(2) electromagnetic radiation of Wireless Telecom Equipment, further increases the complexity of power plant's electromagnetic environment, aggravates electromagnetism and does
The influence to power plant's process control equipment is disturbed, production that can be to power plant and operation security composition great threat.Therefore, it is proposed that
A kind of wisdom power plant wireless messages monitoring system and method based on sound communication come into operation, to solve the above problems.
The content of the invention
It is an object of the invention to provide a kind of wisdom power plant wireless messages monitoring system and method based on sound communication, with
The problem of solving to propose in above-mentioned background technology.
To achieve the above object, the present invention provides following technical scheme：A kind of wisdom power plant wireless communication based on sound communication
Monitoring system is ceased, the wisdom power plant wireless messages monitoring system based on sound communication is somebody's turn to do by sensor, A/D data acquisition chips, wheat
Gram wind, loudspeaker, speech chip, Micro-processor MCV, SD card, server, serial communication modular and each block supports circuit group
Into microphone, loudspeaker, speech chip, Micro-processor MCV, serial communication modular and each block supports circuit composition convergence section
Point；
The A/D data acquisition chips are used for the output voltage signal for gathering analog signal sensors；
The microphone is used to gather linear FM signal；
The loudspeaker is used to send linear FM signal；
The speech chip is used to control collection and plays acoustical signal；
The Micro-processor MCV is used for the operational process for controlling each intermodule and algorithm operation；
The SD card is used to store local sensor data, routing table, network parameter configuration and other information；
The communication that the serial communication modular is used between node and computer；
The server is used for the operation for controlling whole wireless messages monitoring system, receives each sensor letter for carrying out automatic network
Breath, and shown.
It is preferred that, the kind of sensor includes temperature sensor, humidity sensor, pressure sensor, flow sensor
And vibrating sensor.
It is preferred that, a kind of wisdom power plant wireless messages monitoring method based on sound communication is somebody's turn to do the wisdom electricity based on sound communication
Factory wireless messages monitoring method is comprised the following steps that：
S1：Lay each wireless sensor node, including child node and aggregation node；Aggregation node passes through serial ports with server
It is connected；Child node is arranged on each equipment end, is connected with sensor；On aggregation node data friendship is carried out after electricity with server
Mutually, default network configuration parameter, and the presence of notification server itself are obtained；Aggregation node uses audio communication technology, to unite
One data frame format opens aggregation node major network networking flow to network others child node broadcast networking order；
S2：Each child node is received after the networking commands in step S1, opens the major network networking flow of aggregation node, and is pressed
Network is added according to networking flow, the wireless sensor network of tree topology is set up；According to the time sequencing for adding network, converge
Poly- node distributes local ident, communication time slot, communication channel and routing table to each child node, and sends to server and each sub- section
Point；Aggregation node controls each child node Broadcast Subnet networking commands, opens subnet networking flow, now, each child node is used as son
Network father node；
S3：The networking commands of father node in each child node receiving step S2, add subnet；Each father node is each in subnet
Second son node distribution local ident, communication channel and time slot, and it is sent to aggregation node and each child node；
S4：Each node opens the synchronous flow of clock；Ranging flow is opened simultaneously and differentiation flow is blocked, between acquisition node
Distance and channel parameter；Server is the optimal routed path of each node distribution, routing table is led to by optimum routing protocol flow
Cross network and be sent to each node；
S5：Each node receiving step S4 routing table information, and the routing table information being locally stored is updated；Convergence
Node opening network maintenance process；
S6：The network that each node is built by step S2, the time slot divided according to step S3, channel, with TDMA's
The information that mode is gathered sensor is sent to aggregation node, turned by aggregation node by the routing table path in step S5
State to server, and shown in monitoring software.
It is preferred that, in the step S1, the communication band of audio communication technology be the 16kHz that can not be perceived by the human ear extremely
22kHz high-frequency sound frequency range, the audio communication technology has 6 communication channels, a width of 1kHz of band of each channel, and sound
The signal modulation form of the sound communication technology is the form that linear frequency modulation is combined with amplitude-shift keying ASK.
It is preferred that, the linear FM signal is divided into two classes, and the wideband correlation synchronous for clock is with being used for
The narrowband linear FM signal of audio communication, the expression formula of linear FM signal is：
The parameter of wideband correlation is：f0=16kHz, T=Ts=50ms,B=120000Hz/s；It is narrow
Parameter with linear FM signal is：f0={ 16,17,18,19,20,21 } kHz, T=10ms, Ts=5ms,B=
200000Hz/s, S={ s are denoted as by a length for n data binary system chipi| i=1,2 ..., n }, then node physical layer
The modulated signal launched is：
It is preferred that, in the step S2, wireless sensor network has 4 layer architectures：Application layer, Internet, media intervention
Key-course, physical layer；The application layer is used to connect sensor, SD card and serial communication modular, by sensor data transmission extremely
Internet, SD card or serial communication modular, or network layer data is sent to SD card and serial communication modular；The application layer is used
In clock synchronization, ranging and the channel parameter estimation of network；The Internet is used for control node and initiates networking commands, adds net
Network, network route management, application layer data is encapsulated after be forwarded to physical layer, or physical layer data is uploaded to application layer；Institute
Stating media intervention key-course is used for TDMA sequence control, channel control；The physical layer is used for the data for parsing Internet, and
Under the supervision that media intervene key-course, it is sent to the sound letter of channel, or accept channel in the form of modulating acoustical signal
Number, after being parsed, data frame is Resealed into, Internet is uploaded to.
It is preferred that, the flow of the wireless sensor network includes the major network networking flow of aggregation node, communication network ginseng
Number Optimizing Flow and network operation flow.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention in actual use, not by extraneous forceful electric power
The interference of magnetic environment, while also not outwardly radiated electromagnetic wave, therefore be highly suitable to be applied for power station environment etc. other to electromagnetism
The region of radiation more sensitivity.Selected channel bands are that human ear can not perceive wave band, do not result in acoustic environment pollution, simultaneously
Transmitting antenna and extra hardware device need not be relied on, common microphone, loudspeaker and processor is relied solely on, you can realized
Reliable data are wirelessly transferred.The present invention wireless communication protocol have good quickly networking performance, based on distance and regard
Away from optimal finger table planning strategy, it is ensured that the transmitting of data, system has good autgmentability.
Brief description of the drawings
Fig. 1 is present system theory diagram；
Fig. 2 is sound communication network topological diagram of the present invention；
Fig. 3 is sound communication flow through a network structure chart of the present invention；
Fig. 4 is sound communication data format structures figure of the present invention；
Fig. 5 is sound communication network aggregation node major network networking flow chart of the present invention；
Fig. 6 is the PDF and Density Distribution that sound communication network channel non line of sight of the present invention differentiates feature Rician k-factors；
Fig. 7 is the kernel functional parameter optimum results schematic diagram that sound communication network non line of sight of the present invention differentiates.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, each child node gathers the data of sensor, including temperature, humidity, pressure, flow and vibration signal
Deng, and sent each parameter to aggregation node by sound communication network, sent by aggregation node to server, and be shown in interface
On.
Wisdom power plant wireless messages monitoring system and method for the invention based on sound communication, this method comprise the following steps：
S1：Lay each wireless sensor node, including child node and aggregation node；Aggregation node passes through serial ports with server
It is connected；Child node is arranged on each equipment end, is connected with sensor；On aggregation node data friendship is carried out after electricity with server
Mutually, default network configuration parameter, and the presence of notification server itself are obtained；Aggregation node uses audio communication technology, to unite
One data frame format opens aggregation node major network networking flow to network others child node broadcast networking order；
The child node, by sensor, A/D data acquisition chips, microphone, loudspeaker, speech chip, microprocessor
MCU, SD card, serial communication modular and each block supports circuit composition；The aggregation node is by microphone, loudspeaker, voice core
Piece, Micro-processor MCV, serial communication modular and each block supports circuit composition；
The kind of sensor includes temperature, humidity, pressure, flow, vibration etc.；
The A/D data acquisition chips are used for the output voltage signal for gathering analog signal sensors；
The microphone is used to gather linear FM signal；The loudspeaker is used to send linear FM signal；
The Micro-processor MCV is used for the operational process for controlling each intermodule and algorithm operation；
The SD card is used to store local sensor data, routing table, network parameter configuration and other information；
The communication that the serial communication modular is used between node and computer；
The server is used for the operation for controlling whole wireless messages monitoring system, network is configured, reception comes from
Each sensor information of network, and shown.
The wireless sensor network based on sound communication, is the tree network structure of 2 jumps, SNA such as Fig. 2
It is shown.Wireless sensor network based on sound communication has 4 layer architectures：Application layer, Internet, media intervention key-course, physics
Layer；
The application layer be used for connect sensor, SD card and serial communication modular, by sensor data transmission to Internet,
SD card or serial communication modular, or network layer data is sent to SD card and serial communication modular；The application layer is used for network
Clock is synchronous, ranging and channel parameter estimation；
The Internet is used for control node and initiates networking commands, adds network, network route management, by application layer data
Physical layer is forwarded to after encapsulation, or physical layer data is uploaded to application layer；
The media intervention key-course is used for TDMA sequence control；
The physical layer is used for the data for parsing Internet, and under the supervision that media intervene key-course, by it with modulation
The form of acoustical signal is sent to the voice signal of channel, or accept channel, after being parsed, and Reseals into data frame, is uploaded
To Internet；
The linear FM signal is divided into two classes, and the wideband correlation synchronous for clock is with being used for audio communication
Narrowband linear FM signal；
The parameter of the wideband correlation is：f0=16kHz, T=Ts=50ms,B=120000Hz/
s；
The parameter of the narrowband linear FM signal is：f0={ 16,17,18,19,20,21 } kHz, T=10ms, Ts=
5ms,B=200000Hz/s.
It is described modulation acoustical signal form be：Wherein S={ si| i=1,2 ..., n } it is one
Length is n data binary system chip.
The wireless sensor network based on sound communication, flow are as shown in figure 3, the major network networking stream including aggregation node
Journey, communication network parameters Optimizing Flow and network operation flow.
S2：Each child node is received after the networking commands in step S1, opens the major network networking flow of aggregation node, and is pressed
Network is added according to networking flow, the wireless sensor network of tree topology is set up；According to the time sequencing for adding network, converge
Poly- node distributes local ident, communication time slot, communication channel and routing table to each child node, and sends to server and each sub- section
Point；Aggregation node controls each child node Broadcast Subnet networking commands, opens subnet networking flow, now, each child node is used as son
Network father node；
Described group of uniform data frame format is as shown in figure 4, by frame head (2 bytes), data life (4 bits), addressing
(2.5 bytes), data (7 bytes) and postamble (1 byte) are constituted；
The frame head is made up of the CRC check position of 0xFF and byte；The data life is default hop count,
Often forward once, life subtracts 1, when life is zero, abandon the data, according to actual measurement, set data life as 40；The data
For the data of sensor, there are 7 bytes；The postamble is 0xAA, marks the end of this frame data；
The aggregation node major network networking flow, as shown in figure 5, aggregation node is connected to after networking commands, to Web broadcast
Networking commands, are that it distributes local ident, time slot and channel whenever receiving a child node response, and will letter in the way of addressing
Breath returns to child node；Child node is received after networking instruction, has such as been added network, has then been abandoned the instruction；As do not added network,
Then after random back certain time, the machine sequence number is sent in the way of addressing to host node；Child node receives aggregation node
After local ident, time slot and the channel of distribution, storage, and it is set for work according to these.
The local ident is made up of 2 bytes, and high eight-bit is major network member, and low eight are subnet member.
S3：The networking commands of father node in each child node receiving step S2, add subnet；Each father node is each in subnet
Second son node distribution local ident, communication channel and time slot, and it is sent to aggregation node and each child node；
The subnet networking flow of the child node is similar to the major network networking flow of the aggregation node in step S2.Subnet
Father node (major network member) is that subnet member (secondary child node) distributes local ident, and its form is：High eight-bit is father node ID, low by eight
Position is sub- on-net location；Distributed time slot is in father node time slot；Distributed channel is father node channel；
S4：Each node opens the synchronous flow of clock；Ranging flow is opened simultaneously and differentiation flow is blocked, between acquisition node
Distance and channel parameter；Server is the optimal routed path of each node distribution, routing table is led to by optimum routing protocol flow
Cross network and be sent to each node；
The synchronous flow of the nodal clock is the TPSN principles of comparative maturity in wireless sensor network field, passes through node
Between alternate emission acoustical signal carry out ranging, by receiving the temporal information of father node, pass through distance correction clock jitter.Institute
State the linear FM signal of acoustical signal that the synchronous flow of clock used for 16kHz-22kHz.Each node according to distributed when
Gap broadcasts this acoustical signal, and each node sends the acoustical signal received to server by sound communication network.
The optimum routing protocol planning process, the first standard of its routed path selection is line-of-sight transmission, is regarded in satisfaction
It is most short away from chosen distance under conditions of transmission；If there is no line-of-sight transmission path, shortest path is selected.All calculating are in server
End is carried out.Server is received after institute's audible signal, is opened ranging and is blocked differentiation flow.
Described block differentiates that flow is：By the Lay of Acoustic channel, this fading statistical characteristics extracts characteristic value, and utilizes support
Vector machine (SVM) grader carries out binary classification, is sighting distance or non line of sight the communication Acoustic channel that judges between two nodes.Institute
This fading statistical characteristics of Lay are stated for Rician k-factors KR, its expression formula is：
Wherein σ is the variance of signal dispersion composition, kdFor the energy of line-of-sight transmission composition.By experiment, interior is obtained not
With under scene, sighting distance and the K in the case of two kinds of non line of sightRProbability density function (PDF) is with Density Distribution as shown in fig. 6, in figure
Curve is the probability density function being fitted in both cases.
The grader based on SVMs (SVM), its kernel function selects Non-linear Kernel function --- radial direction base letter
Number (RBF), by by characteristic value KRHigh latitude space is mapped to, to find the hyperplane of a linear separability, binary point is realized
Class (i.e. 0,1 classification.0 represents sighting distance, and 1 represents non line of sight).Affiliated RBF expression formula is：
Wherein γ is a positive kernel function factor, and its choosing value directly determines the performance of grader.It is optimized,
As shown in fig. 7, when taking γ=0.3, accuracy of identification is 98.8%.
S5：Each node receiving step S4 routing table information, and the routing table information being locally stored is updated；Convergence
Node opening network maintenance process；
The network operation flow exits flow including failure node and new effectively node adds flow.Each node of network
The presence of itself is periodically reported to father node, if father node does not receive the report of child node within the cycle of specifying, distribution is withdrawn
The information such as ID, time slot, route and channel.Each father node periodic broadcasting networking instruction, after new node response is received, is pressed
Subnet networking flow according to step S3 adds network, and enters that row clock is synchronous and optimal road according to the step S4 synchronous flow of clock
By agreement planning process, ID, time slot, routed path and channel in net are obtained.
S6：The network that each node is built by step S2, the time slot divided according to step S3, channel, with TDMA's
The information that mode is gathered sensor is sent to aggregation node, turned by aggregation node by the routing table path in step S5
State to server, and shown in monitoring software.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of wisdom power plant wireless messages monitoring system based on sound communication, it is characterised in that：The wisdom based on sound communication
Power plant's wireless messages monitoring system is by sensor, A/D data acquisition chips, microphone, loudspeaker, speech chip, microprocessor
MCU, SD card, server, serial communication modular and each block supports circuit composition, microphone, loudspeaker, speech chip, Wei Chu
Manage device MCU, serial communication modular and each block supports circuit composition aggregation node；
The A/D data acquisition chips are used for the output voltage signal for gathering analog signal sensors；
The microphone is used to gather linear FM signal；
The loudspeaker is used to send linear FM signal；
The speech chip is used to control collection and plays acoustical signal；
The Micro-processor MCV is used for the operational process for controlling each intermodule and algorithm operation；
The SD card is used to store local sensor data, routing table, network parameter configuration and other information；
The communication that the serial communication modular is used between node and computer；
The server is used for the operation for controlling whole wireless messages monitoring system, receives each sensor information for carrying out automatic network,
And shown.
2. a kind of wisdom power plant wireless messages monitoring system based on sound communication according to claim 1, it is characterised in that：
The kind of sensor includes temperature sensor, humidity sensor, pressure sensor, flow sensor and vibrating sensor.
3. a kind of wisdom power plant wireless messages monitoring method based on sound communication, it is characterised in that：The wisdom based on sound communication
Power plant wireless messages monitoring method is comprised the following steps that：
S1：Lay each wireless sensor node, including child node and aggregation node；Aggregation node is connected with server by serial ports
Connect；Child node is arranged on each equipment end, is connected with sensor；Data interaction is carried out with server after electricity on aggregation node, is obtained
Take default network configuration parameter, and the presence of notification server itself；Aggregation node uses audio communication technology, with uniform data
Frame format opens aggregation node major network networking flow to network others child node broadcast networking order；
S2：Each child node is received after the networking commands in step S1, opens the major network networking flow of aggregation node, and according to group
Net flow adds network, sets up the wireless sensor network of tree topology；According to the time sequencing for adding network, convergence section
Point distributes local ident, communication time slot, communication channel and routing table to each child node, and sends to server and each child node；Converge
Poly- each child node Broadcast Subnet networking commands of node control, open subnet networking flow, now, each child node is used as sub-network father
Node；
S3：The networking commands of father node in each child node receiving step S2, add subnet；Each father node is each second son in subnet
Node distribution local ident, communication channel and time slot, and it is sent to aggregation node and each child node；
S4：Each node opens the synchronous flow of clock；Ranging flow is opened simultaneously and differentiation flow is blocked, and obtains the distance between node
And channel parameter；Server is the optimal routed path of each node distribution, routing table is passed through into net by optimum routing protocol flow
Network is sent to each node；
S5：Each node receiving step S4 routing table information, and the routing table information being locally stored is updated；Aggregation node
Opening network maintenance process；
S6：The network that each node is built by step S2, the time slot divided according to step S3, channel, in the way of TDMA
The information that sensor is gathered is sent to aggregation node by the routing table path in step S5, by aggregation node report to
Server, and shown in monitoring software.
4. a kind of wisdom power plant wireless messages monitoring method based on sound communication according to claim 3, it is characterised in that：
In the step S1, the communication band of audio communication technology is the high-frequency sound frequency for the 16kHz to 22kHz that can not be perceived by the human ear
Section, the audio communication technology has 6 communication channels, a width of 1kHz of band of each channel, and the signal of audio communication technology
Modulation format is the form that linear frequency modulation is combined with amplitude-shift keying ASK.
5. a kind of wisdom power plant wireless messages monitoring method based on sound communication according to claim 4, it is characterised in that：
The linear FM signal is divided into two classes, the wideband correlation synchronous for clock and the narrowband line for audio communication
Property FM signal, the expression formula of linear FM signal is：
The parameter of wideband correlation is：f0=16kHz, T=Ts=50ms,B=120000Hz/s；Narrowband line
The parameter of property FM signal is：f0={ 16,17,18,19,20,21 } kHz, T=10ms, Ts=5ms,B=
200000Hz/s, S={ s are denoted as by a length for n data binary system chipi| i=1,2 ..., n }, then node physical layer
The modulated signal launched is：
6. a kind of wisdom power plant wireless messages monitoring method based on sound communication according to claim 3, it is characterised in that：
In the step S2, wireless sensor network has 4 layer architectures：Application layer, Internet, media intervention key-course, physical layer；Institute
Stating application layer is used to connect sensor, SD card and serial communication modular, by sensor data transmission to Internet, SD card or serial ports
Communication module, or network layer data is sent to SD card and serial communication modular；Clock that the application layer is used for network is synchronous,
Ranging and channel parameter estimation；The Internet be used for control node initiate networking commands, add network, network route management,
Physical layer is forwarded to after application layer data is encapsulated, or physical layer data is uploaded to application layer；The media intervene key-course
Sequence control, channel control for TDMA；The physical layer is used for the data for parsing Internet, and intervenes key-course in media
Supervision under, it is sent to the voice signal of channel, or accept channel in the form of modulating acoustical signal, after being parsed, weight
Data frame newly is packaged into, Internet is uploaded to.
7. a kind of wisdom power plant wireless messages monitoring method based on sound communication according to claim 6, it is characterised in that：
The flow of the wireless sensor network includes major network networking flow, communication network parameters Optimizing Flow and the network of aggregation node
Maintenance process.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN109147321A (en) * | 2018-08-23 | 2019-01-04 | 重庆文理学院 | ITS new model and its construction method and intelligent transportation system under Internet of Things |
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