CN107071729A - A kind of wireless grain information monitoring sensor node localization system - Google Patents
A kind of wireless grain information monitoring sensor node localization system Download PDFInfo
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- CN107071729A CN107071729A CN201710219503.1A CN201710219503A CN107071729A CN 107071729 A CN107071729 A CN 107071729A CN 201710219503 A CN201710219503 A CN 201710219503A CN 107071729 A CN107071729 A CN 107071729A
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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
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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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
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
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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 invention discloses a kind of wireless grain information monitoring sensor node localization system, including grain information monitoring main frame, grain information monitoring extension set, auxiliary positioning is route and sensor node, wherein grain information monitoring main frame is arranged in control room, grain information monitoring extension set route with auxiliary positioning and is respectively arranged at positions different inside each silo, the mode of sensor node rectangular array distribution is plugged among the grain inside each silo, two-way wireless communication between grain information monitoring main frame and grain information monitoring extension set, grain information monitoring extension set is route and sensor node two-way wireless communication with auxiliary positioning respectively.Present invention saves the installation procedure of equipment, the expenditure of purchase cable for measuring temperature is saved, cost of equipment maintenance is reduced, and position more safe and reliable.
Description
Technical field
The invention belongs to sensor node localization systems technology field, and in particular to a kind of wireless grain information monitoring sensor section
Point positioning system.
Background technology
State Grain Reserve Administration work is the basis of national strategy deposit, and state-owned grain depot carries appointing for safe grain storage
Business, the information such as monitoring grain feelings information such as cereal temperature and humidity, there is vital effect to safe grain storage in time.China is
One large agricultural country, grain reserves have very big demand in each area of China.State-owned grain depot is national each
Ground is also provided with warehouse, although the grain moisture content of storage is smaller, the grain being packed together can also be breathed
Effect release heat and moisture, if processing can cause going mouldy and damaging by worms for grain not in time.By monitoring the humiture of grain,
It is the basis of safe grain storage in the scope for keeping it in a safety.
The grain bin humiture monitoring of early stage is cumbersome and time consuming by being accomplished manually, and accuracy and real-time all compare
It is poor.Recently as the development of electronic technology, digital automatization temperature measuring equipment instead of the artificial thermometric of early stage.At this stage
Grain depot thermometric is mainly wirelessly connected to the extension set of each grain depot by night shift room, passes through installed in the extension set of grain depot wired
Mode connect temperature sensor.In order to perceive particular locations in grain depot temperature, it is necessary to by temperature sensor and grain depot position
Put and be mapped, using it is more be to use DS18B20 1-wire digital temperature sensors, measurement temperature precision is higher, and
It can be powered using two-wire system parasite power power supply mode, greatly save the cost of cable；Simultaneously can be in DS18B20
Write-in represents the sequence number of position in the eeprom registers for the bound alarming value that portion is provided.It is suitable according to certain position before installing
Sequence reads the position for storing sensor internal while temperature to different DS18B20 sensor internals eeprom write-in sequence numbers
Confidence breath is read out, it is possible to which temperature and grain depot positional information are mapped.
But the scheme used at this stage is to use cable to connect between sensor and extension set, because grain depot area is larger,
Longer cable for measuring temperature is needed, cable cost is not only greatly increased, and is not easy to install, operation is also not easy to very much.Simultaneously
Because be monobus mode in order to which anticorrosion needs to be encapsulated into numerous sensors in thick protective case, the length of cable and interior
The number of portion's sensor is required for customization, extends construction period.If more importantly having one inside a cable for measuring temperature line
, it is necessary to which whole cable for measuring temperature is replaced if individual sensor degradation, maintenance cost is considerably increased, while needing specialized maintenance
Personnel are changed, and operation and maintenance cost are of a relatively high.
The content of the invention
The present invention to overcome the deficiencies in the prior art to provide a kind of wireless grain information monitoring sensor node localization system,
Wherein sensor node is by lithium battery power supply, two-way wireless communication between the sensor node and grain information monitoring extension set, every group
Sensor node is all independent, directly can be equally spaced sensor node in silo by rectangular array, it is not necessary to
Professional's installation and debugging, also should not be according to silo size custom-made cable for measuring temperature, and each sensor node
It is identical, backup sensors node can be directly changed after being damaged if sensor node, shifts to an earlier date without the need for artificial
To each sensor node writing position information, sensor node can carry out RSSI positioning, generation sensor node distribution automatically
Figure, greatlys save the installation procedure of equipment, saves the expenditure of purchase cable for measuring temperature, reduces cost of equipment maintenance, and positioning
It is more safe and reliable.
The present invention adopts the following technical scheme that a kind of wireless grain information monitoring sensor node is determined to solve above-mentioned technical problem
Position system, it is characterised in that including grain information monitoring main frame, grain information monitoring extension set, auxiliary positioning route and sensor node, wherein
Grain information monitoring main frame is arranged in control room, and grain information monitoring extension set and auxiliary positioning route are respectively arranged inside each silo not
Same position, the mode of sensor node rectangular array distribution is plugged among the grain inside each silo, grain information monitoring
Two-way wireless communication between main frame and grain information monitoring extension set, grain information monitoring extension set is route and sensor node with auxiliary positioning respectively
Two-way wireless communication；
Described grain information monitoring extension set include single-chip microcomputer, solar recharging module, power module, residual capacity measurement module,
Zigbee wireless communication modules, high-power wireless transceiver module and humidity sensor, wherein single-chip microcomputer respectively by circuit with too
Positive energy charging module, power module, residual capacity measurement module, Zigbee wireless communication modules, high-power wireless transceiver module
With humidity sensor connection, the solar recharging module is used to be charged for the power module of grain information monitoring extension set, power supply mould
Block is used to store the electric energy of solar recharging module generation and provides electric energy, residual capacity measurement mould for whole grain information monitoring extension set
Block is used to detect in grain information monitoring extension set the dump energy of power module and when power module dump energy is less than given threshold
Alarm signal is sent to single-chip microcomputer, Zigbee wireless communication modules are used for and the sensor node inside silo and auxiliary positioning road
By two-way wireless communication, while measuring the RSSI value with specific ID respective sensor node, high-power wireless transceiver module is used
In with grain information monitoring main frame two-way wireless communication, receive the control command from grain information monitoring main frame and on grain information monitoring main frame
Warm and humid degrees of data and sensor node localization information are passed, humidity sensor is used to measure the inside and outside relative humidity of silo
Value；
Described auxiliary positioning route include single-chip microcomputer, solar recharging module, power module, residual capacity measurement module and
Zigbee wireless communication modules, wherein single-chip microcomputer are examined by circuit and solar recharging module, power module, dump energy respectively
Module and the connection of Zigbee wireless communication modules are surveyed, the solar recharging module is used to enter for the power module that auxiliary positioning is route
Row charging, power module is used for the electric energy for storing the generation of solar recharging module and provides electric energy for whole auxiliary positioning route,
Residual capacity measurement module be used for detect auxiliary positioning route in power module dump energy and in power module dump energy
Alarm signal is sent to single-chip microcomputer during less than given threshold, Zigbee wireless communication modules are used to aid in grain information monitoring extension set and biography
Sensor node carries out two-way wireless communication, while measuring the RSSI value with specific ID respective sensor node；
Described sensor node include single-chip microcomputer, Zigbee wireless communication modules, power module, residual capacity measurement module,
DS18B20 sensors and indicating lamp module, wherein single-chip microcomputer pass through circuit and Zigbee wireless communication modules, power supply mould respectively
Block, residual capacity measurement module, DS18B20 sensors and indicating lamp module connection, the power module are used to be whole sensor
Node provide electric energy, residual capacity measurement module be used for detection sensor node in power module dump energy, Zigbee without
Line communication module is used to constitute wireless sensor network progress bidirectional data transfers, i.e., according to grain information monitoring extension set, auxiliary positioning
The sensor node of route and known location determines two sensor nodes as beaconing nodes 1 and beaconing nodes 2, the beacon
Node carries out two-way wireless communication with the sensor node of oneself surrounding neighbours respectively and finds the unknown biography of RSSI value maximum 1-2
Sensor node ID as beaconing nodes nearest-neighbors node, if can during the unknown nearest-neighbors node of beaconing nodes only one of which
Its position is directly determined, when beaconing nodes there are two nearest-neighbors nodes, passes through two of beaconing nodes 2 and beaconing nodes 1
Nearest-neighbors node communicated measure respectively with the RSSI value between them, it is true according to the relative size between two RSSI values
Determine their position, similarly beaconing nodes 1 are communicated with two nearest-neighbors nodes of beaconing nodes 2 measure respectively respectively
RSSI value between them, and determine according to the relative size of their RSSI value two unknown nearest-neighbors of beaconing nodes 2
The corresponding particular location of node ID, DS18B20 sensors are used for the cereal temperature information for determining ad-hoc location different height.
The operation method of wireless grain information monitoring sensor node localization system of the present invention, it is characterised in that in rectangle
The side being distributed inside grain information monitoring extension set and auxiliary positioning route, silo according to rectangular array is respectively mounted on two angles of silo
Formula arranges 1-25 sensor nodes, and the specific position fixing process of each sensor node is：
（1）Understand after the completion of sensor node arrangement and carry out networking automatically according to Networking protocol, and elect cluster head node, when need
When wanting sensor node localization nearest-neighbors section is searched for by sensor node broadcasts of the grain information monitoring extension set into whole silo
Dot command, sensor node adjusts the transmission power of Zigbee wireless communication modules after receiving search nearest-neighbors node orders
To minimum, reduce the radius of communication, then send 50 specific data around successively under the cooperation commander of cluster head node, its
The ID of transmitting terminal sensor node is included in middle packet, the sensor node of signal, grain information monitoring extension set and auxiliary is around received
Help the RSSI value of lower 50 times of route record of positioning then deposit neighboring node list of averaging in, finally saved in numerous neighbours
The RSSI value most strong and close several nodes of numerical value are found in point list as the nearest-neighbors node of oneself, a sensor section
The number of the nearest-neighbors node of point is 1-4；
（2）Pass through step（1）Each sensor node is obtained for the ID of the nearest-neighbors node of oneself, then grain information monitoring extension set
An obtained nearest-neighbors node is the sensor node of No. 1 position, and similarly auxiliary positioning route determines the biography of No. 5 positions
Sensor node, by No. 1 and the corresponding sensor node ID write into Databasce in No. 5 positions；
（3）Sensor node at selection 1 and No. 5 positions is beaconing nodes, and they have 2 nearest-neighbors nodes, No. 1 respectively
Nearest-neighbors node be No. 2 and No. 6, survey their RSSI values between No. 5 beaconing nodes with No. 1 and No. 6 nodes respectively, survey
Amount process is also to seek the average value of 50 times, the larger sensor node for No. 2 positions of RSSI value, and less RSSI value is No. 6
The sensor node of position, similarly determines the sensor node of No. 4 and No. 10 positions respectively, then also will determine position respectively
Sensor node ID position number deposit system database corresponding with them；
（4）Repeat the above steps（3）Sensor node is beaconing nodes at selection 2 and No. 4 positions, determines No. 3 and No. 9 positions
The sensor node at place, the sensor node of No. 3 positions is the nearest-neighbors node of No. 2 and No. 4 positions, and No. 3 remaining one
Nearest-neighbors node is the sensor node of No. 8 positions, and will determine the sensor node ID and their correspondences of position respectively
Position number deposit system database；
（5）The sensor node position of two nearest rows can will be route apart from grain information monitoring extension set and auxiliary positioning by above-mentioned steps
Determination is put, then No. 6 and No. 10 position sensor nodes of selection are beaconing nodes repeat step（3）Determine No. 11 and No. 15 positions
The sensor node at place, and the sensor node ID position number corresponding with them for determining position is stored in system data respectively
Storehouse；
（6）Repeat the above steps（3）、（4）、（5）Until all sensor node positional informations are all determined, then it is whole to sense
The position fixing process of device network terminates.
The present invention has the advantages that compared with prior art：
1st, using the wireless grain information monitoring sensor node localization system of the present invention, it is only necessary to pacify in the specific angle of rectangle silo
Fill grain information monitoring extension set and auxiliary positioning route, it is not necessary to which professional carries out complicated equipment wiring, installed and debugging efforts,
Other locating modules are added also without sensor node；
2nd, grain information monitoring system at this stage needs to write the position letter where sensor in warehouse by professional when mounted
Breath, once more exchange device is accomplished by re-writing sensor position information, wireless grain information monitoring sensor node of the invention can
With the positional information of the automatic update system inner sensor node after each sensor node shift in position；
3rd, placement sensor node need not be moved heavy cable for measuring temperature in grain plane in tow after each grain storage, only be needed
Single sensor node is arranged in silo in the way of same intervals rectangular array is distributed, more at this stage using wired
Connection is more convenient, can move directly to sensor node outside grain depot before grain outbound, it is to avoid wired thermometric
Cable winds the other operations of influence in grain depot；
4th, cable for measuring temperature is needed according to sensor section some in the customized cable for measuring temperature of grain depot size, and a cable at this stage
It is accomplished by changing whole cable for measuring temperature, not only time-consuming but also uneconomical, of the invention wireless grain information monitoring once there is one to damage in point
Sensor node localization system only needs to take standby sensor node to change the sensor node damaged, both need not be special
Industry human users are also without rewiring, and cost is lower, more efficient.
Brief description of the drawings
Fig. 1 is the silo device distribution schematic diagram of wireless grain information monitoring sensor node localization system of the invention；
Fig. 2 is the general module connection figure of wireless grain information monitoring sensor node localization system of the invention；
Fig. 3 is the module connection figure of grain information monitoring extension set in the present invention；
Fig. 4 is the module connection figure of auxiliary positioning route in the present invention；
Fig. 5 is the module connection figure of sensor node in the present invention.
In figure：1st, grain information monitoring extension set, 2, auxiliary positioning route, 3, sensor node.
Embodiment
The particular content of the present invention is described in detail with reference to accompanying drawing.A kind of wireless grain information monitoring sensor node localization system,
Including grain information monitoring main frame, grain information monitoring extension set 1, auxiliary positioning route 2 and sensor node 3, wherein grain information monitoring main frame is set
It is placed in control room, grain information monitoring extension set 1 route 2 with auxiliary positioning and is respectively arranged at positions different inside each silo, passes
The mode of the rectangular array of sensor node 3 distribution is plugged among the grain inside each silo, grain information monitoring main frame and grain feelings
Two-way wireless communication between observing and controlling extension set 1, grain information monitoring extension set 1 route 2 and the two-way nothing of sensor node 3 with auxiliary positioning respectively
Line communicates；
Described grain information monitoring extension set include single-chip microcomputer, solar recharging module, power module, residual capacity measurement module,
Zigbee wireless communication modules, high-power wireless transceiver module and humidity sensor, wherein single-chip microcomputer respectively by circuit with too
Positive energy charging module, power module, residual capacity measurement module, Zigbee wireless communication modules, high-power wireless transceiver module
With humidity sensor connection, the solar recharging module is used to be charged for the power module of grain information monitoring extension set, power supply mould
Block is used to store the electric energy of solar recharging module generation and provides electric energy, residual capacity measurement mould for whole grain information monitoring extension set
Block is used to detect in grain information monitoring extension set the dump energy of power module and when power module dump energy is less than given threshold
Alarm signal is sent to single-chip microcomputer, Zigbee wireless communication modules are used for and the sensor node inside silo and auxiliary positioning road
By two-way wireless communication, while measuring the RSSI value with specific ID respective sensor node, high-power wireless transceiver module is used
In with grain information monitoring main frame two-way wireless communication, receive the control command from grain information monitoring main frame and on grain information monitoring main frame
Warm and humid degrees of data and sensor node localization information are passed, humidity sensor is used to measure the inside and outside relative humidity of silo
Value；
Described auxiliary positioning route include single-chip microcomputer, solar recharging module, power module, residual capacity measurement module and
Zigbee wireless communication modules, wherein single-chip microcomputer are examined by circuit and solar recharging module, power module, dump energy respectively
Module and the connection of Zigbee wireless communication modules are surveyed, the solar recharging module is used to enter for the power module that auxiliary positioning is route
Row charging, power module is used for the electric energy for storing the generation of solar recharging module and provides electric energy for whole auxiliary positioning route,
Residual capacity measurement module be used for detect auxiliary positioning route in power module dump energy and in power module dump energy
Alarm signal is sent to single-chip microcomputer during less than given threshold, Zigbee wireless communication modules are used to aid in grain information monitoring extension set and biography
Sensor node carries out two-way wireless communication, while measuring the RSSI value with specific ID respective sensor node；
Described sensor node include single-chip microcomputer, Zigbee wireless communication modules, power module, residual capacity measurement module,
DS18B20 sensors and indicating lamp module, wherein single-chip microcomputer pass through circuit and Zigbee wireless communication modules, power supply mould respectively
Block, residual capacity measurement module, DS18B20 sensors and indicating lamp module connection, the power module are used to be whole sensor
Node provide electric energy, residual capacity measurement module be used for detection sensor node in power module dump energy, Zigbee without
Line communication module is used to constitute wireless sensor network progress bidirectional data transfers, i.e., according to grain information monitoring extension set, auxiliary positioning
The sensor node of route and known location determines two sensor nodes as beaconing nodes 1 and beaconing nodes 2, the beacon
Node carries out two-way wireless communication with the sensor node of oneself surrounding neighbours respectively and finds the unknown biography of RSSI value maximum 1-2
Sensor node ID as beaconing nodes nearest-neighbors node, if can during the unknown nearest-neighbors node of beaconing nodes only one of which
Its position is directly determined, when beaconing nodes there are two nearest-neighbors nodes, passes through two of beaconing nodes 2 and beaconing nodes 1
Nearest-neighbors node communicated measure respectively with the RSSI value between them, it is true according to the relative size between two RSSI values
Determine their position, similarly beaconing nodes 1 are communicated with two nearest-neighbors nodes of beaconing nodes 2 measure respectively respectively
RSSI value between them, and determine according to the relative size of their RSSI value two unknown nearest-neighbors of beaconing nodes 2
The corresponding particular location of node ID, DS18B20 sensors are used for the cereal temperature information for determining ad-hoc location different height.
Grain information monitoring extension set is arranged on an angle of rectangle silo, is filled by solar recharging module for power module
Electricity, reduces the possibility being struck by lightning because of mains-supplied, at the same it is easy for installation, by high-capacity lithium battery energy storage.Pass through big work(
Rate radio receiving transmitting module and grain information monitoring main frame carry out wireless two-way communication, while by the various parameters information and sensor of equipment
Node data measured returns to the grain information monitoring main frame in control room.Grain information monitoring extension set can under the cooperation that auxiliary positioning is route
Positioned with the sensor node to whole silo and Data Collection, eliminating prior art needs to pass to each when mounted
Sensor node writes corresponding positional information, and avoids the cable for measuring temperature heavy in tow in placement sensor node back and forth
It is mobile.
Auxiliary positioning route is arranged on apart from the position of grain information monitoring extension set certain distance, for being carried out to sensor node
Auxiliary positioning, while receiving the data message of sensor node.
Sensor node, each sensor node possesses after unique No. ID, grain storage, and grain top-most-surface plane is carried out
It is smooth, then by sensor node according to same intervals（Generally 3-5m）It is arranged in inside rectangle silo, wherein sensor section
The cable for measuring temperature straightened portion of point is injected inside grain heap, is stayed at the top of sensor node outside grain heap.Arrange sensor
The particular location of store interior where system initialization can be automatically positioned sensor node after node, by sensor ID and storehouse
Storehouse interior location sequence number is mapped deposit database；When needing gathered data, sensor node is by temperature data and oneself
ID be sent to the main frame of control room, main frame is by the positional information inside contrasting data storehouse by the temperature data of sensor node
Revert to particular locations inside 3-D graphic.
The present invention carrying out practically process be：Grain information monitoring extension set and auxiliary are respectively mounted on two angles of rectangle silo
1-25 sensor nodes are arranged in the way of rectangular array is distributed inside positioning route, silo, each sensor node
Specifically position fixing process is：
（1）Understand after the completion of sensor node arrangement and carry out networking automatically according to Networking protocol, and elect cluster head node, when need
When wanting sensor node localization nearest-neighbors section is searched for by sensor node broadcasts of the grain information monitoring extension set into whole silo
Dot command, sensor node adjusts the transmission power of Zigbee wireless communication modules after receiving search nearest-neighbors node orders
To minimum, reduce the radius of communication, then send 50 specific data around successively under the cooperation commander of cluster head node, its
The ID of transmitting terminal sensor node is included in middle packet, the sensor node of signal, grain information monitoring extension set and auxiliary is around received
Help the RSSI value of lower 50 times of route record of positioning then deposit neighboring node list of averaging in, finally saved in numerous neighbours
The RSSI value most strong and close several nodes of numerical value are found in point list as the nearest-neighbors node of oneself, a sensor section
The number of the nearest-neighbors node of point is 1-4；
（2）Pass through step（1）Each sensor node is obtained for the ID of the nearest-neighbors node of oneself, then grain information monitoring extension set
An obtained nearest-neighbors node is the sensor node of No. 1 position, and similarly auxiliary positioning route determines the biography of No. 5 positions
Sensor node, by No. 1 and the corresponding sensor node ID write into Databasce in No. 5 positions；
（3）Sensor node at selection 1 and No. 5 positions is beaconing nodes, and they have 2 nearest-neighbors nodes, No. 1 respectively
Nearest-neighbors node be No. 2 and No. 6, survey their RSSI values between No. 5 beaconing nodes with No. 1 and No. 6 nodes respectively, survey
Amount process is also to seek the average value of 50 times, the larger sensor node for No. 2 positions of RSSI value, and less RSSI value is No. 6
The sensor node of position, similarly determines the sensor node of No. 4 and No. 10 positions respectively, then also will determine position respectively
Sensor node ID position number deposit system database corresponding with them；
（4）Repeat the above steps（3）Sensor node is beaconing nodes at selection 2 and No. 4 positions, determines No. 3 and No. 9 positions
The sensor node at place, the sensor node of No. 3 positions is the nearest-neighbors node of No. 2 and No. 4 positions, and No. 3 remaining one
Nearest-neighbors node is the sensor node of No. 8 positions, and will determine the sensor node ID and their correspondences of position respectively
Position number deposit system database；
（5）The sensor node position of two nearest rows can will be route apart from grain information monitoring extension set and auxiliary positioning by above-mentioned steps
Determination is put, then No. 6 and No. 10 position sensor nodes of selection are beaconing nodes repeat step（3）Determine No. 11 and No. 15 positions
The sensor node at place, and the sensor node ID position number corresponding with them for determining position is stored in system data respectively
Storehouse；
（6）Repeat the above steps（3）、（4）、（5）Until all sensor node positional informations are all determined, then it is whole to sense
The position fixing process of device network terminates.
All the sensors node is all to lean on lithium battery power supply in the present invention, although being all low power dissipation design, energy is also
It is limited, above-mentioned position fixing process sensor node is chosen for beaconing nodes in turn, and to avoid same sensor node multiple
It is chosen for beaconing nodes and power consumption is excessive, node is dead because of depleted of energy too early, the operating time of enhancing whole system.
When some sensor node battery electric quantity less than threshold value can by grain information monitoring extension set into control room grain information monitoring
Main frame sends request charge command, or the computer monitoring picture of control room can be to work people during the damage of some sensor node
Member's report needs the positional information for the sensor node changed, and when staff needs to change sensor node, chooses by more
The indicator lamp that the sensor node input changed is changed on order, the then sensor node for the node peripheral region being replaced can all dodge
Sparkle, the sensor being replaced can also light the indicator lamp of oneself if it can normally receive order, facilitate work to seek
Look for replacing.After secondary node, which is arranged in, is replaced node location, surrounding nearest-neighbors node is surveyed by interactive communication therewith
Measure RSSI value, when the nearest-neighbors node of surrounding measure RSSI value it is close when, be considered as sensor node and change successfully, automatically more
New database can be replaced the id information of sensor node at position, and the instruction of the sensor node flashed around automatic distinguishing
Lamp.
Have been shown and described above the general principle of the present invention, principal character and advantage, do not depart from spirit of the invention and
On the premise of scope, the present invention also has various changes and modifications, and these changes and improvements both fall within claimed invention
Scope.
Claims (2)
1. a kind of wireless grain information monitoring sensor node localization system, it is characterised in that including grain information monitoring main frame, grain information monitoring
Extension set, auxiliary positioning route and sensor node, wherein grain information monitoring main frame is arranged in control room, grain information monitoring extension set and auxiliary
Positioning route is helped to be respectively arranged at positions different inside each silo, the mode grafting of sensor node rectangular array distribution
Among grain inside each silo, two-way wireless communication between grain information monitoring main frame and grain information monitoring extension set, grain information monitoring
Extension set is route and sensor node two-way wireless communication with auxiliary positioning respectively；
Described grain information monitoring extension set include single-chip microcomputer, solar recharging module, power module, residual capacity measurement module,
Zigbee wireless communication modules, high-power wireless transceiver module and humidity sensor, wherein single-chip microcomputer respectively by circuit with too
Positive energy charging module, power module, residual capacity measurement module, Zigbee wireless communication modules, high-power wireless transceiver module
With humidity sensor connection, the solar recharging module is used to be charged for the power module of grain information monitoring extension set, power supply mould
Block is used to store the electric energy of solar recharging module generation and provides electric energy, residual capacity measurement mould for whole grain information monitoring extension set
Block is used to detect in grain information monitoring extension set the dump energy of power module and when power module dump energy is less than given threshold
Alarm signal is sent to single-chip microcomputer, Zigbee wireless communication modules are used for and the sensor node inside silo and auxiliary positioning road
By two-way wireless communication, while measuring the RSSI value with specific ID respective sensor node, high-power wireless transceiver module is used
In with grain information monitoring main frame two-way wireless communication, receive the control command from grain information monitoring main frame and on grain information monitoring main frame
Warm and humid degrees of data and sensor node localization information are passed, humidity sensor is used to measure the inside and outside relative humidity of silo
Value；
Described auxiliary positioning route include single-chip microcomputer, solar recharging module, power module, residual capacity measurement module and
Zigbee wireless communication modules, wherein single-chip microcomputer are examined by circuit and solar recharging module, power module, dump energy respectively
Module and the connection of Zigbee wireless communication modules are surveyed, the solar recharging module is used to enter for the power module that auxiliary positioning is route
Row charging, power module is used for the electric energy for storing the generation of solar recharging module and provides electric energy for whole auxiliary positioning route,
Residual capacity measurement module be used for detect auxiliary positioning route in power module dump energy and in power module dump energy
Alarm signal is sent to single-chip microcomputer during less than given threshold, Zigbee wireless communication modules are used to aid in grain information monitoring extension set and biography
Sensor node carries out two-way wireless communication, while measuring the RSSI value with specific ID respective sensor node；
Described sensor node include single-chip microcomputer, Zigbee wireless communication modules, power module, residual capacity measurement module,
DS18B20 sensors and indicating lamp module, wherein single-chip microcomputer pass through circuit and Zigbee wireless communication modules, power supply mould respectively
Block, residual capacity measurement module, DS18B20 sensors and indicating lamp module connection, the power module are used to be whole sensor
Node provide electric energy, residual capacity measurement module be used for detection sensor node in power module dump energy, Zigbee without
Line communication module is used to constitute wireless sensor network progress bidirectional data transfers, i.e., according to grain information monitoring extension set, auxiliary positioning
The sensor node of route and known location determines two sensor nodes as beaconing nodes 1 and beaconing nodes 2, the beacon
Node carries out two-way wireless communication with the sensor node of oneself surrounding neighbours respectively and finds the unknown biography of RSSI value maximum 1-2
Sensor node ID as beaconing nodes nearest-neighbors node, if can during the unknown nearest-neighbors node of beaconing nodes only one of which
Its position is directly determined, when beaconing nodes there are two nearest-neighbors nodes, passes through two of beaconing nodes 2 and beaconing nodes 1
Nearest-neighbors node communicated measure respectively with the RSSI value between them, it is true according to the relative size between two RSSI values
Determine their position, similarly beaconing nodes 1 are communicated with two nearest-neighbors nodes of beaconing nodes 2 measure respectively respectively
RSSI value between them, and determine according to the relative size of their RSSI value two unknown nearest-neighbors of beaconing nodes 2
The corresponding particular location of node ID, DS18B20 sensors are used for the cereal temperature information for determining ad-hoc location different height.
2. a kind of operation method of the wireless grain information monitoring sensor node localization system described in claim 1, it is characterised in that
It is respectively mounted on two angles of rectangle silo inside grain information monitoring extension set and auxiliary positioning route, silo according to rectangular array point
The mode of cloth arranges 1-25 sensor nodes, and the specific position fixing process of each sensor node is：
（1）Understand after the completion of sensor node arrangement and carry out networking automatically according to Networking protocol, and elect cluster head node, when need
When wanting sensor node localization nearest-neighbors section is searched for by sensor node broadcasts of the grain information monitoring extension set into whole silo
Dot command, sensor node adjusts the transmission power of Zigbee wireless communication modules after receiving search nearest-neighbors node orders
To minimum, reduce the radius of communication, then send 50 specific data around successively under the cooperation commander of cluster head node, its
The ID of transmitting terminal sensor node is included in middle packet, the sensor node of signal, grain information monitoring extension set and auxiliary is around received
Help the RSSI value of lower 50 times of route record of positioning then deposit neighboring node list of averaging in, finally saved in numerous neighbours
The RSSI value most strong and close several nodes of numerical value are found in point list as the nearest-neighbors node of oneself, a sensor section
The number of the nearest-neighbors node of point is 1-4；
（2）Pass through step（1）Each sensor node is obtained for the ID of the nearest-neighbors node of oneself, then grain information monitoring extension set
An obtained nearest-neighbors node is the sensor node of No. 1 position, and similarly auxiliary positioning route determines the biography of No. 5 positions
Sensor node, by No. 1 and the corresponding sensor node ID write into Databasce in No. 5 positions；
（3）Sensor node at selection 1 and No. 5 positions is beaconing nodes, and they have 2 nearest-neighbors nodes, No. 1 respectively
Nearest-neighbors node be No. 2 and No. 6, survey their RSSI values between No. 5 beaconing nodes with No. 1 and No. 6 nodes respectively, survey
Amount process is also to seek the average value of 50 times, the larger sensor node for No. 2 positions of RSSI value, and less RSSI value is No. 6
The sensor node of position, similarly determines the sensor node of No. 4 and No. 10 positions respectively, then also will determine position respectively
Sensor node ID position number deposit system database corresponding with them；
（4）Repeat the above steps（3）Sensor node is beaconing nodes at selection 2 and No. 4 positions, determines No. 3 and No. 9 positions
The sensor node at place, the sensor node of No. 3 positions is the nearest-neighbors node of No. 2 and No. 4 positions, and No. 3 remaining one
Nearest-neighbors node is the sensor node of No. 8 positions, and will determine the sensor node ID and their correspondences of position respectively
Position number deposit system database；
（5）The sensor node position of two nearest rows can will be route apart from grain information monitoring extension set and auxiliary positioning by above-mentioned steps
Determination is put, then No. 6 and No. 10 position sensor nodes of selection are beaconing nodes repeat step（3）Determine No. 11 and No. 15 positions
The sensor node at place, and the sensor node ID position number corresponding with them for determining position is stored in system data respectively
Storehouse；
（6）Repeat the above steps（3）、（4）、（5）Until all sensor node positional informations are all determined, then it is whole to sense
The position fixing process of device network terminates.
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