A kind of city parking information service system based on wireless sensor networkTechnical field
The present invention relates to the technical field of static intelligent traffic administration system, specifically a kind of city parking information service system based on wireless sensor network.
Background technology
Parking information service system is as one of important component part of intelligent transportation system, belong to advanced traffic information system (Advnaeed Trvaeler Inofmration System, ATIS) category should be made up of subsystems such as collecting vehicle information, network information transfer, distributed information processing enter and information issues.But many-side such as the technology of being subjected to and fund influences, existing parking information service system only can obtain from the management host in parking lot information, simply handle after, by variable information plate issue, its system forms shown in Figure 1.The remarkable shortcoming of this system is to carry out real-time statistics to the parking stall behaviour in service such as the distribution of berth duty of inside, parking lot, and then can't provide services such as inner guiding in parking lot and parking stall reservation, promptly allow to add up total berth number, the residue berth number uploaded and also have the poor problem of real-time, its reason is to lack cheap effective monitoring means on collecting vehicle information.
Based on the managing system of car parking of sensing net, to compare with traditional management system based on RS-485bus, it is having multiple advantage aspect laying and safeguarding.It will be further appreciated that most of managing system of car parking now only in the control of place, gateway, lack the management in space, parking lot and the guiding of vehicle.Administrative mechanism is raised the efficiency although up-to-date management system has adopted the RFID no-stop charging system, and they still do not reach the driver for the requirement of fast and safely stopping.The driver can not stopped and be entered the parking lot, seeks the empty wagons position but need to spend the plenty of time.Managing system of car parking based on the sensing net then can utilize the perception of sensor node to monitor and manage each parking stall, and special guide service is provided.The Berkeley University is developing parking management and the inner guidance system based on wireless sensor network recently.The parking management system based on wireless sensor network that municipal administration traffic office in San Francisco uses StreetlineNetworks company to provide is supervised Macau Fisherman's Wharf (Fishman ' s Wharf) and near 200 parking stalls of En Bakadiou (Embarcadero).
For transmission network, the Network Transmission of parking information service system part mainly comprises the collection of parking space information and the communication between the long-distance user.Aspect the parking space information collection, prior art mainly adopts modes such as fieldbus or wireless networking.Owing to lay light current circuit in a big way in the parking lot or between local parking stall, often need to slot, set up measures such as keel, the complicacy of circuit and cost problem are more outstanding in large parking lot.Therefore, adopting the wireless networking parking space information to collect is a kind of comparatively desirable mode, but originally still there are many problems in scheme in aspects such as Radio Link, energy consumption, network sizes.As existing Zigbee agreement, though obtaining certain success aspect the wireless industrial control, since exist the network size extendability poor, can't support large scale network, lifetime of system lack problems such as (common batteries power supplies), so be difficult to be effectively applied in the parking information service system.Dust Network company 2006 has carried out the parking occupancy management system application experiment based on the wireless sensor network of independent development in San Francisco, preliminary identification the validity of wireless sensor network in parking stall management, but owing to do not carry out deep cooperation, so this system also not formally running as yet at present with operator.Because the parking lot is distributed in each zone, city widely, have only the parking space information in the comprehensive entire city scope, could improve the utilization factor of parking stall effectively, and serve masses.The mobile network is because its cellphone subscriber basis and good charging mode widely, be highly suitable for parking information service system, but existing parking management system only with it as a simple channel, therefore, the characteristics that need abundant combining with wireless sensor network and mobile network, the gordian technique of aspects such as breakthrough radio network gateway, information interaction pattern.
Aspect information processing and issue, existing system is aggregated into background process with all information unifications, causes the turnover of extra information, brings bigger time delay, as update cycle time on the variable information plate be 5min, cause information credibility to descend.Simultaneously, present mode only has in the information issue: three kinds of modes such as information board, web webpage and voice message phone are difficult to form interactive between system and the driver.In addition, building the variable information plate, need to set up portal frame or vertical rod, excavated pavement cabling or the like investment huge.
Just because of the intrinsic defective of these systems itself, the popularization since 2004 begin to set up based on the parking information service experimental system of variable information plate of ground such as Beijing, Shanghai, Guangzhou is very slow.Shanghai only in Huangpu, two districts, Xuhui set up 36 places, 64 parking guidances issue boards, covers 39 garage parkings of opening to the outside world 5900 surplus a parking stall.On the contrary, along with mobile phone popularizing and promoting in China, there is the road that mobile radio communication is just arranged, all has a mobile phone on any motor vehicle at least, utilize the two-dimensional bar technology need on mobile phone, not increase any hardware device, as long as being arranged, the mobile phone of display screen can subscribe and pay Parking Fee, combine with sensor network and not only can gather parking space information in real time, realize that the parking stall subscribes, can also realize the inner stopping guide in parking lot, thoroughly solve the parking difficult problem of " car can not find the seat, the people can not find car ".
Summary of the invention
The purpose of this invention is to provide a kind of city parking information service system based on wireless sensor network, to overcome the drawback of traditional cities parking information service system, realization is issued from parking lot information gathering to parking space information, is inquired about, subscribes, induces etc. in the omnibearing intelligent parking target of one, satisfies growing city intelligent parking demand.
For achieving the above object, the present invention has adopted following technical scheme: the invention discloses a kind of city parking information service system based on wireless sensor network, it is characterized in that comprising:
Inner management unit, parking lot is based on wireless sensor network, to realize the monitoring and the management of parking stall state;
Communication module to realize inner management unit, parking lot and extraneous communicating by letter, receives the parking lot relevant information that wireless sensor network is gathered, and sends the information that is obtained;
Service platform is distributed to the user with the information that communication module sent, and information inquiry, parking stall are subscribed, the reimbursement of expense service for the user provides.
Wherein, described wireless sensor network comprises
Vehicle monitoring node in parking stall is installed on each parking stall, takies situation with unloading lot detection;
Via node is used for the forwarding of data relaying;
The Sink node is with the collected information of managing wireless sensing device network;
Each node communicates by wireless channel, forms sensing network in the mode of self-organization.
Technically, city parking information service system based on wireless sensor network is a complication system that relates to people, car, road, parking lot quaternity, and it comprises parking lot Internal Management System, gateway transmission system, information service platform and delivery system etc.
1) parking lot Internal Management System
The parking lot Internal Management System mainly is to realize the parking stall status monitoring, and whether the differentiation parking stall took with down time is added up; The inner stopping guide in parking lot, guided vehicle is parked in the system assignment parking stall; Collecting vehicle information obtains human pilot and vehicle identification number information by the HD video means; The inner automatic management in parking lot comprises the fast query of charge and data, statistics and analysis.
2) gateway transmission system
Gateway transmission system (comprising TD, GPRS and WLAN) is as an important component part in the system of intelligent body parking lot, main being responsible for receives the parking lot relevant information that wireless sensor network is gathered, and institute's acquired information is sent to the mobile communications network correlation function by the mobile communications network interface.
3) information service platform and information issuing system
As the interface between mobile communications network and the user, can directly satisfy user's actual need based on the service application platform of mobile communications network, improve user's experience and satisfaction for the user provide the practical relevant information service in parking lot.The parking space information that China Mobile will utilize this application platform that wireless sensor network is collected sends to the user and (can show real-time parking space information by the LED display board, also can send to the user) by portable terminal, be the value-added service that the user provides information to issue, this application platform can also provide multiple relevant value-added services such as information inquiry, parking stall reservation, fare payment simultaneously.
In addition, the public understands the parking information in the whole metropolitan area scope for convenience, the parking lot information in a certain subrange can be gathered in the metropolitan area scope and issue in the metropolitan area scope.Specifically, with business circles is that center, a parking information coverage is formed in zone or 5~10 parking lots, consider that this regional center does not need personnel on duty convenient with the equipment power taking, regional center can be placed on mobile transmitting base station machine room, and realize that in regional center signal lands, all parking lot information and facility information in the monitored area can be aggregated into the parking information mobile service platform by the moving fiber backbone network.The district management center has stronger data processing function, the release news processing of reliability of integration, the data that comprise parking lot management information.Employing information issue screen mode provides particular location and room condition information about reaching the parking lot to entering the vehicle of inducing the zone.Provide passerby's mobile phones enquiring parking space information, and accept the booking service of mobile phone parking stall.
Good effect of the present invention is: native system has been realized interconnecting of wireless sensor network and mobile communications network, fixed telephone network, radio and television, internet and government administration section private network, can alleviate difficult, the more difficult social concern of stopping of driving.In addition, but system field such as expanded application megastore electronic shopping guide and scenic spot electronic guide also.
Description of drawings
Fig. 1 is traditional parking information service system block diagram;
Fig. 2 is the structural representation that the present invention is based on the city parking information service system of wireless sensor network.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
A kind of city parking information service system based on wireless sensor network as shown in Figure 2 comprises:
Inner management unit, parking lot is based on wireless sensor network, to realize the monitoring and the management of parking stall state;
Communication module to realize inner management unit, parking lot and extraneous communicating by letter, receives the parking lot relevant information that wireless sensor network is gathered, and sends the information that is obtained;
Service platform is distributed to the user with the information that communication module sent, and information inquiry, parking stall are subscribed, the reimbursement of expense service for the user provides.
Native system will be laid a sensing net in the parking lot, and 3 kinds of sensor nodes are installed, and be respectively parking stall vehicle monitoring node, via node and Sink node.Vehicle monitoring node in parking stall will be installed on each ground, parking stall and survey the situation of taking, and via node should be born the data forwarding relay task, and the LED display that also will control crossing place is helped the driver and sought the empty wagons position.The information that the whole network of Sink node control is collected also passes to data management station and the mobile communications network management system that is contained in monitoring room, parking lot.The Sink node can integrate with the TD/GPRS/WLAN communication module of mobile communications network forms the gateway transmission system.In addition, all nodes all are to communicate by wireless channel, form sensing network in the mode of self-organization.Then, management station will calculate guidance information according to the topological structure in parking lot and the situation that takies on parking stall, pass to suitable via node.
1) wagon detector
The present invention will provide a kind of vehicle detecting sensor that utilizes to survey parking position information of park, and the information that will handle by Wireless transmission mode sends to signal receiving device, signal receiving device is sent to the computer control managing center with information, can realize the parking position duty is carried out the statistical counting function, be a kind of newer parking stall Detection Techniques.Mainly form on the hardware by sensor, amplification filtering circuit, voltage comparator circuit, processor and peripheral circuit and radio circuit and power circuit.
2) repeater
Information data transmission node as wagon detector, detecting device about 10 uses a via node in use, when laying, reality can rationally lay according to condition of construction, the condition that needs to consider is the distance of detector subsystem and receiver subsystem, detector subsystem has unshielded existence, between have clear etc. to influence the factor of wireless transmission effect, also need to consider the high transmit power and the face of land transmission range of detector subsystem simultaneously, factors such as repeater subsystem individual node wireless coverage.According to these preconditions, determine the quantity and the laying mode of the repeater subsystem of needs in conjunction with customer demand.The repeater subsystem is laid between receiver and the detector subsystem, for being fixed on the ceiling of parking lot or on the load-bearing pillar in the parking garage.
3) gateway
Gateway is made up of three parts: the SINK aggregation node of wagon detector and central processing module and mobile communication network transport module such as TD module, GPRS module or WLAN module.
4) the area information processing enter is high-performance distributed cluster computer, and this computing machine is mainly added up the parking position free time of administration and made to generate and induces strategy, and the real-time update of display screen is induced in control.Its position will preferentially be placed on the owner place, and demo system will be determined as the case may be.
5) service platform
Service platform will utilize the existing data management service platform of China Mobile, and and existing Geographic Information System, network device management, far management system and related data is shared to government department by the internet network, issue to masses etc.
Communication between the node of vehicle detecting sensor described in the present invention, via node, aggregation node and the existing public network facility all can adopt the existing communication method to realize, main innovate point of the present invention is to propose the architecture of city parking information service system, utilize wireless sensor network, information to rely on cell phone network on issuing in information acquisition, realize the mutual fusion of wireless sensor network and mobile communications network, and parking lot transceiver mode based on mobile phone payment proposed, greatly reduce the parking lot management complexity, improved efficient.As long as adopt parking information service system structure of the present invention, no matter adopt which kind of communication protocol, all fall within protection scope of the present invention.