CN107959729A - Crop growth environment monitoring system and method based on wireless sensor network - Google Patents
Crop growth environment monitoring system and method based on wireless sensor network Download PDFInfo
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- CN107959729A CN107959729A CN201711466742.3A CN201711466742A CN107959729A CN 107959729 A CN107959729 A CN 107959729A CN 201711466742 A CN201711466742 A CN 201711466742A CN 107959729 A CN107959729 A CN 107959729A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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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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Abstract
The present invention provides the crop growth environment based on wireless sensor network to monitor system and method, wherein system includes environment monitoring device, base station and monitoring center, wherein environment monitoring device includes multiple sensor nodes positioned at tested point, the sensor node is used for the environmental information for gathering tested point, and environmental information is sent to base station；Base station and monitoring center's wireless connection, for receiving and handling the environmental information of sensor node transmission, and the environmental information after processing are sent to monitoring center.The present invention realizes the wireless monitor of crop growth environment.
Description
Technical field
The present invention relates to agricultural monitoring field, and in particular to the crop growth environment monitoring based on wireless sensor network
System and method.
Background technology
Main problem existing for current crop growth environment monitoring system：One be a lack of it is a kind of covering it is careful enough
Monitoring system；Second, the intelligence of monitoring system and networking degree are inadequate.In the system of crop growth environment monitoring at present
Sensor is all to be connected in a manner of wired with control and monitor console, and the quantity of sensor and placement position are all changeless, to be obtained
Into crop growth environment, any local environmental parameter is impossible.And crop growth environment monitoring system needs
There is professional regularly to be monitored to data in master control platform, so not only increase human cost, and reliability does not have yet
It is secure.
The content of the invention
In view of the above-mentioned problems, the present invention provides crop growth environment monitoring system and side based on wireless sensor network
Method.
The purpose of the present invention is realized using following technical scheme：
Provide the crop growth environment monitoring system based on wireless sensor network, including environment monitoring device, base
Stand and monitoring center, wherein environment monitoring device include multiple sensor nodes positioned at tested point, the sensor node is used
In the environmental information of collection tested point, and environmental information is sent to base station；Base station and monitoring center's wireless connection, for receiving
The environmental information sent with processing sensor node, and the environmental information after processing is sent to monitoring center.
Preferably, the monitoring center is connected with information transceiver.
Preferably, the monitoring center includes data memory module, data analysis module, control module, and wherein data are deposited
Module is stored up to be used to store into built-in database from the environmental information that base station receives；The data analysis module is used for
By environmental information compared with its default corresponding threshold value；The control module is used to exceed corresponding thresholding in environmental information
Information transceiver is controlled to send alarming short message to user terminal during value.
Present invention also offers the crop growth environment monitoring method based on wireless sensor network, this method is included such as
Lower step：
(1) determine that crop growth environment monitors region, multiple tested points be set in crop growth environment monitoring region,
Sensor node is laid in each tested point；
(2) multiple sensor nodes are used to sensing and gathering the environment of tested point by topology evolution mechanism construction into one
The wireless sensor network of information；
(3) sensor node senses and gathers the environmental information of tested point, and by the form of multi-hop transmission by tested point
Environmental information be eventually sent to base station；
(4) base station receives and handles the environmental information for the tested point that each sensor node is sent, and by the environment after processing
Information is sent to monitoring center；
(5) monitoring center continually scans for the environmental information for entering database in nearest one section of refresh time, make its with it is advance
All kinds of parameter threshold levels of setting are compared, if it exceeds threshold value is then determined as exception, when environmental information exceedes to answering the door
During limit value, monitoring center controls connected information transceiver to send alarming short message to user terminal.
Alternatively, the environmental information includes temperature, humidity and light intensity.
Beneficial effects of the present invention are：It can be used for completing the real-time comprehensive monitoring to crop growth environment, it is adopted
Monitoring method can make timely counter-measure to the change of the growing environment of crop.
Brief description of the drawings
Using attached drawing, the invention will be further described, but the embodiment in attached drawing does not form any limit to the present invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is the structure diagram of the crop growth environment monitoring system of one embodiment of the invention；
Fig. 2 is the structure diagram of the monitoring center of one embodiment of the invention；
Fig. 3 is the flow chart of the crop growth environment monitoring method of one embodiment of the invention.
Reference numeral：
Environment monitoring device 1, base station 2, monitoring center 3, information transceiver 4, data memory module 10, data analysis module
20th, control module 30.
Embodiment
The invention will be further described with the following Examples.
Referring to Fig. 1, the crop growth environment monitoring system provided in this embodiment based on wireless sensor network, including
Environment monitoring device 1, base station 2 and monitoring center 3, wherein environment monitoring device 1 include multiple sensor sections positioned at tested point
Point, the sensor node is used for the environmental information for gathering tested point, and environmental information is sent to base station 2；Base station 2 and monitoring
3 wireless connection of center, sends for receiving and handling the environmental information of sensor node transmission, and by the environmental information after processing
To monitoring center 3.
Alternatively, the monitoring center 3 is connected with information transceiver 4.
In one embodiment, as shown in Fig. 2, monitoring center 3 includes data memory module, data analysis module, control
Module, wherein data memory module are used to store into built-in database from the environmental information that base station 2 receives；Described
Data analysis module is used for environmental information compared with its default corresponding threshold value；The control module is used in environment
Information controls information transceiver 4 to send alarming short message to default user terminal when exceeding corresponding threshold value.
Referring to Fig. 3, present invention also offers the crop growth environment monitoring method based on wireless sensor network, including
Following steps：
S01 determines that crop growth environment monitors region, and multiple tested points are set in crop growth environment monitoring region,
Sensor node is laid in each tested point；
The more a sensor nodes of S02 are used to sensing and gathering the environment of tested point by topology evolution mechanism construction into one
The wireless sensor network of information；
S03 sensor nodes sense and gather the environmental information of tested point, and by the form of multi-hop transmission by tested point
Environmental information be eventually sent to base station；
S04 base stations receive and handle the environmental information for the tested point that each sensor node is sent, and by the environment after processing
Information is sent to monitoring center；
S05 monitoring center continually scans for the environmental information for entering database in nearest one section of refresh time, make its with it is advance
All kinds of parameter threshold levels of setting are compared, if it exceeds threshold value is then determined as exception, when environmental information exceedes to answering the door
During limit value, monitoring center controls connected information transceiver to send alarming short message to user terminal.
Alternatively, the environmental information includes temperature, humidity and light intensity.
The monitoring greenhouse fine crops growing environment system that the above embodiment of the present invention provides can be used for completing to farming
The real-time comprehensive monitoring of thing growing environment, its used monitoring method can make in time the change of the growing environment of crop
Counter-measure.
In one embodiment, topology evolution mechanism specifically includes：
S001 initial times, base station 2 together constitute with initial topology with the sensor node near it；
S002 often crosses a time step, and a sensor node is added into present topology；
The sensor node that S003 is newly added adjusts the communication radius of itself according to current remaining, and determines currently to open up
The sensor node in the range of its communication radius flutterred, is included into neighbor node collection；
The sensor node that S004 is newly added calculates neighbor node and concentrates each sensor node to be chosen the general of connection
Rate；
S005 is concentrated from neighbor node according to the descending order of the probability calculated and is selected m0A sensor node into
Row connection, wherein m0<M, wherein m are that neighbor node concentrates the sensor node number included；
S006 continues to execute step S002 to S005, until N1A sensor node adds topology, wherein N0+N1=N, its
Middle N0The sensor node number included for initial topology, N are the sensor node number being deployed in the monitoring region of setting.
In correlation technique, Connected degree distribution function has power rate form in scales-free network, since the degree of its node does not have
Characteristic length, thus based on the sensor network topological of complex network scaleless property structure, can have network higher random
Survivability, and connecting link is less between node, reduces communication and wastes.Although this method improves network in terms of random survivability
Performance, but since it spends the uneven of distribution, cause some key node energy expenditures huge, make its premature death so as to cause
The failure of network.The present embodiment is further improved on the basis of this method, it is proposed that a kind of new topology evolution mechanism
To build wireless sensor network topology.
In one embodiment, the probability that sensor node is chosen to connect is calculated according to following equation：
In formula, ΛzRepresent the neighbor node collection of sensor node z newly added, ∏ (x) represents that neighbor node concentrates xth
A sensor node is chosen the probability of connection, DxFor the node degree of x-th of sensor node, WxFor described x-th sensing
The current remaining of device node, B (x, z) be between x-th of sensor node and the sensor node z that newly adds away from
From B (x, sink) is x-th of sensor node to the distance of base station 2, DyRepresent that neighbor node concentrates y-th of sensor
Node, DyFor the node degree of y-th of sensor node, WyFor the current remaining of y-th of sensor node, B
(y, z) is the distance between y-th of sensor node and the sensor node z newly added, and B (y, sink) is the y
A sensor node is to the distance of base station 2, a1、a2For default weight coefficient.
The topological structure of wireless sensor network is wireless sensor network basis for the survival, and limited sensor node
Energy would generally cause sensor node depleted of energy to fail and cause topological segmentation, and based on this, the present embodiment is wireless in structure
During the topological structure of sensor network, the calculation formula that new sensor node is chosen the probability of connection is defined；
From the probability calculation formula, sensor node be chosen probability and the current remaining of connection, node degree,
Euclidean distance between node pair and the distance dependent with base station 2, when the current remaining of sensor node is larger, node degree is larger, section
When in small distance between point and base station 2 closer to the distance, the probability bigger of connection is chosen, is conducive to promote the sensing newly added
Device node connects that consumed energy is less and the sensor node of more dump energy first so that the topology of generation being capable of balanced net
Network energy consumption, so as to reduce the energy consumption of crop growth environment monitoring, improves the reliability of crop growth environment monitoring.
In one embodiment, base station 2 together constitutes with initial topology with the sensor node near it, is specially：Will be away from
It is less than B from base station 2TSensor node directly built with base station 2 topology even side, wherein BTFor the distance threshold of setting.
In another embodiment, base station 2 together constitutes with initial topology with the sensor node near it, is specially：
(1) base station 2 determines the value of utility of each node nearby, wherein nearby node is to be less than B apart from base station 2TSensor
Node；
Wherein, if RpRepresent the value of utility of node p nearby, RpCalculation formula be：
In formula, WpFor the current remaining of neighbouring node p, B (p, sink) is distances of the neighbouring node p to base station 2,
WelecFor radio frequency transmission coefficient, εampFor the amplification coefficient of the transtation mission circuit of sensor node, Bp-maxFor neighbouring node p and its phase
Distance away from farthest neighbor node；
(2) value of utility threshold value R is setT, will meet Rp>RTNear node and base station together constitute with initial topology.
The present embodiment is defined the building mode of wireless sensor network initial topology, due to sensor node
Dump energy and distance apart from base station 2 will influence whether the life cycle of sensor node, and the present embodiment is according to value of utility
To choose the sensor node of structure initial topology, only by current remaining, the sensor section met the requirements with 2 distance of base station
Point participates in the structure of initial topology, so as to ensure the stability of initial topology, improves the survivability energy of initial topology, and have
Beneficial to the energy consumption of balanced wireless sensor network so that the wireless sensor network topology of generation can more reliably carry out ring
The collection of border information.
In one embodiment, the communication radius of sensor node can be in L1<L2<…<LNBetween continuously switch.
In one embodiment, the sensor node newly added adjusts the communication of itself according to current remaining
Radius, specifically includes：
(1) sensor node newly added obtains the current remaining of each sensor node in present topology；
(2) communication radius valuation is calculated according to current remaining, if LiRepresent the communication of sensor node i newly added
Radius valuation, LiCalculation formula be：
In formula, WiCurrent remaining for the sensor node i newly added, WjFor j-th of sensing in present topology
The current remaining of device node, niRepresent the number for the sensor node that present topology has；
(3) if Ln<Li<Ln+1, wherein L1≤Ln<Ln+1≤LN, then the sensor node newly added adjusts the communication of its own
Radius is Ln+1。
The present embodiment proposes the communication radius regulation mechanism of the sensor node newly added, the sensor node newly added
The communication radius of itself is adjusted by the mechanism, the sensor node that can prevent from newly adding loses because of consuming excessively for energy
Effect, is beneficial to the reliability of enhancing topology, and is conducive to promote wireless sensor network to energy saving direction to change, so that beneficial
In the cost for saving environment information acquisition, the safety and reliability that crop growth environment monitors is improved.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of scope is protected, although being explained with reference to preferred embodiment to the present invention, those of ordinary skill in the art should
Work as understanding, can be to technical scheme technical scheme is modified or replaced equivalently, without departing from the reality of technical solution of the present invention
Matter and scope.
Claims (7)
1. the crop growth environment monitoring system based on wireless sensor network, it is characterized in that, including environment monitoring device, base
Stand and monitoring center, wherein environment monitoring device include multiple sensor nodes positioned at tested point, the sensor node is used
In the environmental information of collection tested point, and environmental information is sent to base station；Base station and monitoring center's wireless connection, for receiving
The environmental information sent with processing sensor node, and the environmental information after processing is sent to monitoring center.
2. the crop growth environment monitoring system according to claim 1 based on wireless sensor network, it is characterized in that,
The monitoring center is connected with information transceiver.
3. the crop growth environment monitoring system according to claim 2 based on wireless sensor network, it is characterized in that,
The monitoring center include data memory module, data analysis module, control module, wherein data memory module be used for will be from base
The environmental information that station receives is stored into built-in database；The data analysis module is used for environmental information is pre- with it
If correspondence threshold value be compared；The control module is used to control information transmit-receive when environmental information exceedes corresponding threshold value
Device sends alarming short message to user terminal.
4. system is monitored according to crop growth environment of the claim 1-3 any one of them based on wireless sensor network,
It is characterized in that multiple sensor nodes positioned at tested point are used to sense into one by topology evolution mechanism construction and collection is treated
The wireless sensor network of the environmental information of measuring point.
5. the crop growth environment monitoring method based on wireless sensor network, it is characterized in that, include the following steps：
(1) determine that crop growth environment monitors region, multiple tested points are set in crop growth environment monitoring region, every
A tested point lays sensor node；
(2) multiple sensor nodes are used to sensing and gathering the environmental information of tested point by topology evolution mechanism construction into one
Wireless sensor network；
(3) sensor node senses and gathers the environmental information of tested point, and by the form of multi-hop transmission by the ring of tested point
Border information is eventually sent to base station；
(4) base station receives and handles the environmental information for the tested point that each sensor node is sent, and by the environmental information after processing
Send to monitoring center；
(5) monitoring center continually scans for the environmental information for entering database in nearest one section of refresh time, makes it with presetting
All kinds of parameter threshold levels be compared, if it exceeds threshold value is then determined as exception, when environmental information exceedes corresponding threshold value
When, monitoring center controls connected information transceiver to send alarming short message to user terminal.
6. the crop growth environment monitoring method according to claim 5 based on wireless sensor network, it is characterized in that,
The environmental information includes temperature, humidity and light intensity.
7. the crop growth environment monitoring method based on wireless sensor network according to claim 5 or 6, its feature
It is that topology evolution mechanism specifically includes：
S001 initial times, base station together constitute with initial topology with the sensor node near it；
S002 often crosses a time step, and a sensor node is added into present topology；
The sensor node that S003 is newly added adjusts the communication radius of itself according to current remaining, and determines present topology
Sensor node in the range of its communication radius, is included into neighbor node collection；
The sensor node that S004 is newly added calculates the probability that neighbor node concentrates each sensor node to be chosen connection；
S005 is concentrated from neighbor node according to the descending order of the probability calculated and is selected m0A sensor node is connected
Connect, wherein m0<M, wherein m are that neighbor node concentrates the sensor node number included；
S006 continues to execute step S002 to S005, until N1A sensor node adds topology, wherein N0+N1=N, wherein N0For
The sensor node number that initial topology includes, N are the sensor node number being deployed in the monitoring region of setting.
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