CN107134153A - Magnitude of traffic flow acquisition system based on wireless sensor network - Google Patents
Magnitude of traffic flow acquisition system based on wireless sensor network Download PDFInfo
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- CN107134153A CN107134153A CN201710340606.3A CN201710340606A CN107134153A CN 107134153 A CN107134153 A CN 107134153A CN 201710340606 A CN201710340606 A CN 201710340606A CN 107134153 A CN107134153 A CN 107134153A
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- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count
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Abstract
The invention provides the magnitude of traffic flow acquisition system based on wireless sensor network, including traffic flow data acquisition module, background server and host computer based on wireless sensor network；The traffic flow data acquisition module is used to gather traffic flow data by wireless sensor network, and traffic flow data is sent into background server by internet；The background server is used to receive the traffic flow data, and sends request traffic flow data to host computer；The host computer is used to receive user instruction, sends traffic flow data request, receives traffic flow data and is shown.The present invention gathers traffic flow data by the traffic flow data acquisition module based on wireless sensor network, and be managed collectively by backstage, user can obtain information of vehicle flowrate on road in real time, compared with traditional magnitude of traffic flow acquisition system, it is convenient with safeguarding in construction, the real-time monitoring of special bus traffic conditions can be achieved.
Description
Technical field
The present invention relates to technical field of transportation, and in particular to the magnitude of traffic flow acquisition system based on wireless sensor network.
Background technology
Wireless sensor network is a kind of network gathered towards traffic flow data, and network is by much carrying the magnitude of traffic flow
Self-organizing network is mutually built between the sensor of data acquisition and the node composition of wireless transmitter, node, by certainly
The traffic flow data of collection is transferred to background system by the mode of organizing communication.
The construction of magnitude of traffic flow acquisition system in correlation technique is cumbersome with safeguarding, and can not accomplish to traffic flow
Amount collection in real time.
The content of the invention
In view of the above-mentioned problems, the present invention provides the magnitude of traffic flow acquisition system based on wireless sensor network.
The purpose of the present invention is realized using following technical scheme：
There is provided the magnitude of traffic flow acquisition system based on wireless sensor network, including the friendship based on wireless sensor network
Through-current capacity data acquisition module, background server and host computer；The traffic flow data acquisition module is used for by wireless
Sensor network gathers traffic flow data, and traffic flow data is sent into background server by internet；After described
Platform server is used to receive the traffic flow data, and sends request traffic flow data to host computer；The host computer is used
In receiving user instruction, traffic flow data request is sent, traffic flow data is received and is shown.
Beneficial effects of the present invention are：Gathered and handed over by the traffic flow data acquisition module based on wireless sensor network
Through-current capacity data, and be managed collectively by backstage, user can obtain information of vehicle flowrate on road in real time, be adopted with traditional magnitude of traffic flow
Collecting system is compared, convenient with safeguarding in construction, and the real-time monitoring of special bus traffic conditions can be achieved.
Brief description of the drawings
Using accompanying drawing, the invention will be further described, but the embodiment in accompanying drawing does not constitute any limit to the present invention
System, for one of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to the following drawings
Other accompanying drawings.
The block diagram representation of Fig. 1 present invention；
Fig. 2 is the block diagram representation of host computer of the present invention.
Reference：
Traffic flow data acquisition module 1, background server 2, host computer 3, memory module 4, display module 5.
Embodiment
The invention will be further described with the following Examples.
The magnitude of traffic flow acquisition system based on wireless sensor network provided referring to Fig. 1, Fig. 2, the present embodiment, including base
In the traffic flow data acquisition module 1, background server 2 and host computer 3 of wireless sensor network；The magnitude of traffic flow number
It is used for according to acquisition module 1 by wireless sensor network collection traffic flow data, and by internet by traffic flow data
It is sent to background server 2；The background server 2 is used to receive the traffic flow data, and sends the request magnitude of traffic flow
Data are to host computer 3；The host computer 3 is used to receive user instruction, sends traffic flow data request, receives magnitude of traffic flow number
According to and shown.
Preferably, the traffic flow data acquisition module 1 includes sensor node, leader cluster node and aggregation node, institute
Stating sensor node is used to gather traffic flow data；The leader cluster node is used for the magnitude of traffic flow that collecting sensor node is gathered
Data, and to being sent after traffic flow data progress traffic flow data fusion treatment to aggregation node.
Preferably, the background server 2 is communicated to connect with the aggregation node.
Preferably, the host computer 3 includes memory module 4 and display module 5, and wherein memory module 4 is used to store and received
Traffic flow data, display module 5 be used for traffic flow data is shown.
The above embodiment of the present invention gathers traffic by the traffic flow data acquisition module 1 based on wireless sensor network
Data on flows, and be managed collectively by backstage, user can obtain information of vehicle flowrate on road in real time, be gathered with traditional magnitude of traffic flow
System is compared, convenient with safeguarding in construction, and the real-time monitoring of special bus traffic conditions can be achieved.
Preferably, the leader cluster node is selected according to customized sub-clustering mechanism from sensor node, is specially：
(1) aggregation node sends sub-clustering order to each sensor node, and each sensor node is adjusted by adjusting transmitting power consumption
Whole communication distance is the communication distance threshold value of setting, and exchanges to the neighbor node in the range of communication distance the dump energy of itself
And received signal strength, each sensor node is received after the information that neighbor node is exchanged in the range of communication distance, if under meeting
Row election contest condition, then send the message of " election contest cluster head " to aggregation node, otherwise abandon the competition of cluster head：
In formula,Represent sensor node CiDump energy,Represent sensor node CiIn the range of communication distance
Neighbor node CjDump energy, ξ be sensor node CiThe quantity of neighbor node in the range of communication distance,To pass
Sensor node CiReceived signal strength,For sensor node CiNeighbor node C in the range of communication distancejReception letter
Number intensity, R1For the dump energy threshold value of setting, R2For the received signal strength threshold value of setting, R3For the neighbor node threshold of setting
Value；
(2) aggregation node is received after " election contest cluster head " message that all sensor nodes put up are sent, and is being set
Be chosen so that in the range of fixed cluster head quantity threshold the minimum cluster head number of network energy consumption as optimal cluster head number
K；
(3) according to optimal cluster head number K from during oriented aggregation node sends the sensor node of " election contest cluster head " message
Cluster head is selected, and to sensor node broadcasts " appointment cluster head " message of selection, the sensor node for receiving this message is elected to
For cluster head；
(4) start clustering operation, to the other sensors node in wireless sensor network, calculate the sensor node with
The distance between each leader cluster node, selects leader cluster node corresponding apart from minimum value, and the sensor node is added into this selects
Leader cluster node where cluster in.
This preferred embodiment selects leader cluster node by customized sub-clustering mechanism from sensor node, relative to existing
Traffic flow data is directly gathered to the mode of aggregation node by each sensor node in technology, saved based on wireless senser
The transmission energy consumption of the traffic flow data acquisition module 1 of network, can effectively extend the traffic flow based on wireless sensor network
Measure the working life of data acquisition module 1；By setting election contest condition, in the competition of cluster head, unnecessary sensor is screened out
Node, can reduce the time of cluster head competition, so that the relative efficiency for improving traffic flow data collection so that user can be real-time
Obtain information of vehicle flowrate on road.
Further, described customized sub-clustering mechanism, in addition to：Aggregation node is completed in the clustering operation of each round
The load balance degree E (μ) of cluster is calculated afterwards, if E (μ) is less than the load balance degree threshold value of setting, in the cluster head number of setting
The cluster head number for enabling to network energy consumption minimum is reselected in mesh threshold range, original optimal cluster head number is replaced
K, then the operation of (3) and (4) is carried out in sub-clustering mechanism, the wherein load balance degree E (μ) of cluster calculation formula is：
In formula, E (μ) represents the load balance degree of the cluster of μ wheel clustering operation formation, Nhead(μ) represents μ wheel sub-clusterings
Operate the cluster head number of generation, Pi(μ) is that μ takes turns the membership that i-th of cluster of clustering operation formation is included, and P (μ) is μ
The be averaged membership included, P for taking turns the cluster of clustering operation formationmax(μ) is the capacity maximum that μ takes turns clustering operation formation
The membership that cluster is included, Pmin(μ) is that μ takes turns the membership that the cluster for the capacity minimum that clustering operation is formed is included.
This preferred embodiment carries out accommodation to optimal cluster head number K in the manner described above, enables to by making by oneself
The load balance degree that the sub-clustering mechanism of justice carries out the cluster that sub-clustering is obtained is maximized, so as to improve the existence of wireless sensor network
Time, it is ensured that effective progress of traffic flow data collection, is that user can obtain road vehicle information in real time and establish good base
Plinth.
Preferably, if the number that the sensor node of " election contest cluster head " message is sent to aggregation node is ξ ', described root
According to optimal cluster head number K from oriented aggregation node send the sensor node of " election contest cluster head " message in select cluster head, specifically
For：
(1) if ξ '≤K, using oriented aggregation node send the sensor node of " election contest cluster head " message and be all used as cluster
Head；
(2) if ξ ' ＞ K, the sensor node C that " election contest cluster head " message is sent to aggregation node is calculated using following equationi′
Coverage ability, " election contest cluster head " is sent to the oriented aggregation node of institute according to the order of coverage ability from big to small and disappeared
The sensor node of breath is ranked up, and K sensor node is used as cluster head before selection：
In formula,Represent to send the sensor node C of " election contest cluster head " message to aggregation nodei′Coverage energy
Power,Expression meets B (Ci′,Cj′) ＜ RBThe sensor node C of conditioni′The number of neighbor node in the range of communication distance
Amount, Cj′Represent sensor node Ci′Jth ' individual neighbor node in the range of communication distance,Represent sensor node Ci′
The neighbor node quantity having in the range of communication distance, B (Ci′,Cj′) represent sensor node Ci′With its neighbor node Cj′It is graceful
Hatton's distance, RBFor the distance threshold of setting.
In the cluster head selection mode that this preferred embodiment is provided, the cluster head number of selection is controlled in optimal cluster head number K
In the range of, so that lower the need for a certain degree of traffic flow data collection is met minimize leader cluster node number, save
The energy expenditure of traffic flow data collection, reduces the cost of magnitude of traffic flow acquisition system；
In addition, carrying out the screening of sensor node using aforesaid way, enable to the cluster head selected that there is more preferable traffic
Traffic data collection ability, so that energy expenditure unnecessary in reducing in terms of the traffic flow data collection, and improve friendship
The accuracy of data acquisition of through-flow quantity collection system.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than to present invention guarantor
The limitation of scope is protected, although being explained with reference to preferred embodiment to the present invention, one of ordinary skill in the art should
Work as understanding, technical scheme can be modified or equivalent substitution, without departing from the reality of technical solution of the present invention
Matter and scope.
Claims (6)
1. the magnitude of traffic flow acquisition system based on wireless sensor network, it is characterized in that, including based on wireless sensor network
Traffic flow data acquisition module, background server and host computer；The traffic flow data acquisition module is used to pass through nothing
Line sensor network gathers traffic flow data, and traffic flow data is sent into background server by internet；It is described
Background server is used to receive the traffic flow data, and sends request traffic flow data to host computer；The host computer
For receiving user instruction, traffic flow data request is sent, traffic flow data is received and is shown.
2. the magnitude of traffic flow acquisition system according to claim 1 based on wireless sensor network, it is characterized in that, it is described to hand over
Through-current capacity data acquisition module includes sensor node, leader cluster node and aggregation node, and the sensor node, which is used to gather, to be handed over
Through-current capacity data；The leader cluster node is used for the traffic flow data that collecting sensor node is gathered, and to the magnitude of traffic flow number
According to carry out traffic flow data fusion treatment after send to aggregation node.
3. the magnitude of traffic flow acquisition system according to claim 2 based on wireless sensor network, it is characterized in that, it is described after
Platform server is communicated to connect with the aggregation node.
4. the magnitude of traffic flow acquisition system according to claim 1 based on wireless sensor network, it is characterized in that, it is described on
Position machine includes memory module and display module, and wherein memory module is used to store the traffic flow data received, and display module is used
Shown in traffic flow data.
5. the magnitude of traffic flow acquisition system according to claim 2 based on wireless sensor network, it is characterized in that, the cluster
Head node is selected according to customized sub-clustering mechanism from sensor node, is specially：
(1) aggregation node sends sub-clustering order to each sensor node, and each sensor node is logical by adjusting transmitting power consumption adjustment
Communication distance is the communication distance threshold value of setting, and exchanges the dump energy of itself to the neighbor node in the range of communication distance and connect
Signal intensity is received, each sensor node is received after the information that neighbor node is exchanged in the range of communication distance, if meeting following competing
Condition is selected, then the message of " election contest cluster head " is sent to aggregation node, the competition of cluster head is otherwise abandoned：
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In formula,Represent sensor node CiDump energy,Represent sensor node CiNeighbour in the range of communication distance
Occupy node CjDump energy, ξ be sensor node CiThe quantity of neighbor node in the range of communication distance,For sensing
Device node CiReceived signal strength,For sensor node CiNeighbor node C in the range of communication distancejReception signal
Intensity, R1For the dump energy threshold value of setting, R2For the received signal strength threshold value of setting, R3For the neighbor node threshold value of setting；
(2) aggregation node is received after " election contest cluster head " message that all sensor nodes put up are sent, in setting
Be chosen so that in the range of cluster head quantity threshold the minimum cluster head number of network energy consumption as optimal cluster head number K；
(3) according to optimal cluster head number K from oriented aggregation node send the sensor node of " election contest cluster head " message in select
Cluster head, and to sensor node broadcasts " appointment cluster head " message of selection, the sensor node for receiving this message is elected as cluster
Head；
(4) start clustering operation, to the other sensors node in wireless sensor network, calculate the sensor node and each cluster
The distance between head node, selects leader cluster node corresponding apart from minimum value, and the sensor node is added into the cluster selected
In cluster where head node.
6. the magnitude of traffic flow acquisition system according to claim 5 based on wireless sensor network, it is characterized in that, if to remittance
The number that poly- node sends the sensor node of " election contest cluster head " message is ξ ', it is described according to optimal cluster head number K from all
Sent to aggregation node in the sensor node of " election contest cluster head " message and select cluster head, be specially：
(1) if ξ '≤K, using oriented aggregation node send the sensor node of " election contest cluster head " message and be all used as cluster head；
(2) if ξ ' ＞ K, the sensor node C that " election contest cluster head " message is sent to aggregation node is calculated using following equationi′Section
Point covering power, according to the order of coverage ability from big to small to institute's oriented aggregation node transmission " election contest cluster head " message
Sensor node is ranked up, and K sensor node is used as cluster head before selection：
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In formula,Represent to send the sensor node C of " election contest cluster head " message to aggregation nodei′Coverage ability,
Expression meets B (Ci′,Cj′) ＜ RBThe sensor node C of conditioni′The quantity of neighbor node in the range of communication distance, Cj′Table
Show sensor node Ci′Jth ' individual neighbor node in the range of communication distance,Represent sensor node Ci′In communication distance
In the range of the neighbor node quantity that has, B (Ci′,Cj′) represent sensor node Ci′With its neighbor node Cj′Manhatton distance,
RBFor the distance threshold of setting.
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