CN103914992A - Intelligent parking detection system based on wireless sensor network - Google Patents
Intelligent parking detection system based on wireless sensor network Download PDFInfo
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Abstract
The invention discloses an intelligent parking detection system based on the wireless sensor network. The system comprises a plurality of detection nodes, an aggregation node, a server and a plurality of intelligent mobile terminals, wherein the detection nodes are distributed below parking positions and used for detecting the changes of magnetic fields of the parking positions to judge whether a vehicle is parked or not. The judgment result of the detection nodes is sent out in a wireless mode and is received by the aggregation node. The aggregation node analyzes content and sources of a data package, and uploads the content and the sources of the data package to the server through a USB serial port. The server displays, processes and counts the data, and provides a port for remote access. The intelligent mobile terminals have access to the server through the Internet, obtain the parking data and achieve the function for making an appointment of parking positions with the server.
Description
Technical field
The present invention relates to wireless sensor technology, relate in particular to a kind of intelligent parking detection system based on wireless sensor network.
Background technology
Along with the quickening of China's expanding economy and urbanization process, how the vehicle increasing year by year in city, carry out systematization, informationalized management to vehicle, becomes a problem demanding prompt solution.Wherein, managing system of car parking is an important component part of vehicle management system.Along with parking lot quantity is more and more, scale is increasing, and labor management more and more difficulty is satisfied the demand.Therefore, industry has developed some managing system of car parking and has solved the problem that parking position is managed, as detection methods such as contactless card, ultrasound wave, eddy current, image, earth magnetism.
But all there is certain defect in above detection system, for example, although contactless card is installed and is easy to use, but can only detect the number of Parking, can not detect the situation that takies on concrete parking stall, when larger in parking lot, be still difficult to parking stall to manage and guide sailing vehicle into.
Ultrasonic wave detecting system cost is higher, and in testing process, scattering phenomenon easily occurs, and is easily closed on parking stall and disturbs and cause error detection.
Eddy detection system need to magnetic test coil at ground paving, larger for the construction volume of existing parking lot repacking.
Image detecting system need to be learnt and pattern-recognition parking situation, and the versatility of detection method is poor.And image detection need to be arranged a large amount of cameras, so cost is also higher.
Existing geomagnetism detecting system mainly adopts wired power supply and two kinds of modes of powered battery, wherein the mode of wired power supply need to be laid power cable, construction volume is larger, and adopt battery powered mode, because node does not have dormancy awakening function, lasting detection causes power consumption larger, often need to change battery, safeguards comparatively complicated.And the size and Orientation in magnetic field all may change after vehicle parking, magnetic field sensor also changes along with the variation of temperature, the impact that existing detection method does not avoid these factors to bring well.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of intelligent parking detection system based on wireless sensor network is provided.
The object of the invention is to be achieved through the following technical solutions: the present invention relates to a kind of intelligent parking detection system based on wireless sensor network, comprise multiple detection node, an aggregation node, a server and multiple mobile intelligent terminal.Detection node is deployed in below each parking stall, for detection of the variation in magnetic field, parking stall, has judged whether vehicle parking.The result of detection node judgement is sent by wireless, is received by aggregation node.Aggregation node is analyzed content and the source of packet, and uploads onto the server by USB serial ports.Server shows, processes and add up data, and remote access interface is provided.Mobile intelligent terminal, by Internet access services device, obtains parking data and realizes to the function on server reservation parking stall.
Further, described detection node is made up of magnetic field sensor, temperature sensor, microprocessor, storer, LED light, serial ports, level switch module, power supply, radio-frequency module and antenna.Wherein, magnetic field sensor, temperature sensor, storer, LED light, level switch module and RF radio-frequency module are connected with microprocessor, and microprocessor is by Power supply, and serial ports is connected with level switch module, and antenna is connected with RF radio-frequency module.Magnetic field sensor adopts mistor, three axial magnetic field intensitys of measurement space rectangular coordinate system; Temperature sensor adopts thermal resistance, the temperature of survey sensor position; Microprocessor adopts ATmega128L chip, for measurement data the processing of receiving sensor; Storer is for storing the code of detection node operation; LED light is for showing in real time parking stall seizure condition; Serial ports and level switch module are for the code of uploading detection node; Power acquisition high-capacity lithium battery is detection node power supply; Detection node data after treatment send with the form of radiowave by radio-frequency module and antenna.
The course of work of microprocessor is as follows: when detection node initialization, first record initial temperature and magnetic field intensity.Enter afterwards circulation dormancy awakening state.Detection node is waken up at every turn, all detected temperatures and magnetic field intensitys again, and by magnetic field intensity according to temperature correction, impact magnetic field sensor reading being produced to eliminate temperature variation.Afterwards, detection node compares the magnetic field intensity after calibration and initial magnetic field intensity, obtains the maximum of change of magnetic field strength in single shaft direction.If the maximum of change of magnetic field strength exceedes threshold value, judgement has vehicle to sail parking stall into, output seizure condition, otherwise think do not have vehicle to sail parking stall into, output idle condition.
Detection node in monitored area is set up network by less radio-frequency.The result of detection node judgement sends to aggregation node by the mode of less radio-frequency.The packet producing from the close-by examples to those far off transmits between detection node in the mode of multi-hop, and is finally that aggregation node receives.
Further, described aggregation node is made up of microprocessor, storer, LED light, serial ports, level switch module, radio-frequency module and antenna.Wherein, storer, LED light, level switch module and RF radio-frequency module are connected with microprocessor, and microprocessor is by Power supply, and serial ports is connected with level switch module, and antenna is connected with RF radio-frequency module.Storer is for storing the code of aggregation node operation, LED light is used to indicate the packet of receiving that detection node is sent, microprocessor adopts ATmega128L chip, for measurement data the processing of receiving sensor, serial ports and level switch module, for uploading the code of aggregation node, transmit data for aggregation node to server simultaneously.Radio-frequency module and antenna are used for receiving the packet that detection node is sent, and send synch command to detection node.
The course of work of microprocessor is as follows: receives the packet that detection node is sent, packet analyzed, judge source and the content of packet, and during analysis result is uploaded onto the server.
In addition, aggregation node timed sending synch command bag, all detection node of controlling in wireless network are waken up simultaneously and sleep, to ensure that all detection node are waken up simultaneously, detect simultaneously, transmission, forwarding data bag, make wireless network under the condition of low-power consumption, continue running.
Further, the server course of work is as follows:
(1) carry out serial ports read operation: server is monitored the serial ports of aggregation node by a thread, to obtain the Monitoring Data in radio sensor network monitoring region.
(2) resolution data bag: in the time that serial ports receives data, the packet that watcher thread reception aggregation node is sent by serial ports is also analyzed, if data layout conforms to, packet content is resolved, obtain the information such as node number, dead ship condition of detection node.And send message to main thread.
(3) show in real time: in the time that main thread receives the message that watcher thread sends, according to the information such as node number, dead ship condition of detection node, call Graphics Control, upgrade the dead ship condition of the corresponding parking stall of display interface.
(4) write into Databasce: main thread connection data storehouse, by the node number of detection node, dead ship condition, receive that the information such as the moment of data are written in database.
(5) historical statistics: after information write into Databasce, user can select the statistical function of server, specify some time periods and the time interval, server can be by this time period, every this time interval, the variation tendency of parking lot free parking space quantity shows with the form of statistical graph.
(6) mobile intelligent terminal inquiry and reservation: server allows mobile intelligent terminal remote access, checks dead ship condition the go forward side by side reservation of driving position and management.When mobile intelligent terminal sends when reserve requests, server can judge current whether available free parking stall, if available free parking stall is returned to the successful information of reservation, and a parking stall is labeled as to reservation.Otherwise return to the information that reservation is failed.If user sails vehicle into parking stall at the appointed time, this parking stall is changed into and being taken by preengaging mark, if user does not sail vehicle into parking stall at the appointed time, regain the parking stall of being preengage, be again labeled as the free time.
Further, described mobile intelligent terminal can be realized: the long-range look facility that real-time parking information is shown; The remote reserved function on reservation parking stall.
In the time that user passes through mobile intelligent terminal connection server, server can return to the occupied information on all parking stalls, and the form with picture shows on mobile intelligent terminal, facilitates user to check that parking stall takies the seizure condition on number and each parking stall.
In the time of user click reservation function, whether successfully server can be carried out and preengage and return client reservation message.If preengage successfully, the while is in the position, parking stall of mobile intelligent terminal explicit reservation.
The beneficial effect that the present invention has is: building of the intelligent parking detection system based on wireless sensor network, can provide real-time parking condition for parking lot management person, and sail parking lot into thereby can control vehicle, and guided vehicle sails correct parking stall into.In addition, this system provides the historical record of parking condition, and the person that facilitates parking lot management understands the utilization factor of parking position, the data such as parking peak period.In addition, system provides long-range real time inspection and reservation function, and user can understand parking lot service condition by mobile intelligent terminal easily, and realizes reservation.
In native system, have cost lower, easy for installation, measure the advantages such as accurate.Compared with existing system, native system node volume is very little, disposes with maintenance all very convenient.Sensor node, by being equipped with special outer cover packaging, does not discharge objectionable impurities, and convenient recovery is very little to environmental impact.Detection node employing circulation wakes the mode of operation with dormancy up, and wakeup time is shorter, and under dormant state, power consumption is very low, and therefore power consumption is significantly less than homogeneous system.Data communication between node, based on 802.15.4 agreement, adopts mesh network, and adopts the mode of dynamic routing, and a node breaks down, and does not affect the data packet transmission of node around, has ensured the reliable and efficient of data communication.Upper computer software adopts server process data, is convenient to amendment, maintenance and remote access.In addition, upper computer software adopts database storage data, is convenient to analysis and the processing of data.In a word, by setting up intelligent parking detection system, can obtain the parking data on each parking stall, be vehicle management informationization, and even the essential step of whole urban informationization.
Brief description of the drawings
Fig. 1 is one-piece construction block diagram of the present invention;
Fig. 2 is the structural drawing of detection node;
Fig. 3 is the structural drawing of aggregation node;
Fig. 4 is the structural drawing of server software;
Fig. 5 is the structural drawing of mobile intelligent terminal.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, detection system comprises multiple detection node, an aggregation node, a server and multiple mobile intelligent terminal.Detection node is deployed in below each parking stall, for detection of the variation in magnetic field, parking stall, has judged whether vehicle parking.The result of detection node judgement is sent by wireless, is received by aggregation node.Aggregation node is analyzed content and the source of packet, and uploads onto the server by USB serial ports.Server shows, processes and add up data, and remote access interface is provided.Mobile intelligent terminal, by Internet access services device, obtains parking data and realizes to the function on server reservation parking stall.
As shown in Figure 2, detection node is made up of magnetic field sensor, temperature sensor, microprocessor, storer, LED light, serial ports, level switch module, power supply, radio-frequency module and antenna.Wherein, magnetic field sensor, temperature sensor, storer, LED light, level switch module and RF radio-frequency module are connected with microprocessor, and microprocessor is by Power supply, and serial ports is connected with level switch module, and antenna is connected with RF radio-frequency module.Magnetic field sensor adopts mistor, three axial magnetic field intensitys of measurement space rectangular coordinate system; Temperature sensor adopts thermal resistance, the temperature of survey sensor position; Microprocessor adopts ATmega128L chip, for measurement data the processing of receiving sensor; Storer is for storing the code of detection node operation; LED light is for showing in real time parking stall seizure condition; Serial ports and level switch module are for the code of uploading detection node; Power acquisition high-capacity lithium battery is detection node power supply; Detection node data after treatment send with the form of radiowave by radio-frequency module and antenna.
The course of work of microprocessor is as follows: when detection node initialization, first record initial temperature and magnetic field intensity.Enter afterwards circulation dormancy awakening state.Detection node is waken up at every turn, all detected temperatures and magnetic field intensitys again, and by magnetic field intensity according to temperature correction, impact magnetic field sensor reading being produced to eliminate temperature variation.Afterwards, detection node compares the magnetic field intensity after calibration and initial magnetic field intensity, obtains the maximum of change of magnetic field strength in single shaft direction.If the maximum of change of magnetic field strength exceedes threshold value, judgement has vehicle to sail parking stall into, output seizure condition, otherwise think do not have vehicle to sail parking stall into, output idle condition.
Detection node in monitored area is set up network by less radio-frequency.The result of detection node judgement sends to aggregation node by the mode of less radio-frequency.Because range for wireless communication is limited, the packet of generation not directly arrives aggregation node, but from the close-by examples to those far off transmits between detection node in the mode of multi-hop, and is finally that aggregation node receives.Between detection node, form mesh network, without set membership, system is dynamically sought footpath according to the state of each detection node, generates as required route, and all detection node can be served as router.
As shown in Figure 3, aggregation node is made up of microprocessor, storer, LED light, serial ports, level switch module, radio-frequency module and antenna.Wherein, storer, LED light, level switch module and RF radio-frequency module are connected with microprocessor, and microprocessor is by Power supply, and serial ports is connected with level switch module, and antenna is connected with RF radio-frequency module.Storer is for storing the code of aggregation node operation, LED light is used to indicate the packet of receiving that detection node is sent, microprocessor adopts ATmega128L chip, for measurement data the processing of receiving sensor, serial ports and level switch module, for uploading the code of aggregation node, transmit data for aggregation node to server simultaneously.Radio-frequency module and antenna are used for receiving the packet that detection node is sent, and send synch command to detection node.
The course of work of microprocessor is as follows: receives the packet that detection node is sent, packet analyzed, judge source and the content of packet, and during analysis result is uploaded onto the server.
In addition, aggregation node timed sending synch command bag, all detection node of controlling in wireless network are waken up simultaneously and sleep, to ensure that all detection node are waken up simultaneously, detect simultaneously, transmission, forwarding data bag, make wireless network under the condition of low-power consumption, continue running.
As shown in Figure 4, the server course of work is as follows:
1, carry out serial ports read operation: server is monitored the serial ports of aggregation node by a thread, to obtain the Monitoring Data in radio sensor network monitoring region.
2, resolution data bag: in the time that serial ports receives data, the packet that watcher thread reception aggregation node is sent by serial ports is also analyzed, if data layout conforms to, packet content is resolved, obtain the information such as node number, dead ship condition of detection node.And send message to main thread.
3, show in real time: in the time that main thread receives the message that watcher thread sends, according to the information such as node number, dead ship condition of detection node, call Graphics Control, upgrade the dead ship condition of the corresponding parking stall of display interface.
4, write into Databasce: main thread connection data storehouse, by the node number of monitoring node, dead ship condition, receive that the information such as the moment of data are written in database.
5, historical statistics: after information write into Databasce, user can select the statistical function of server, specifies some time periods and the time interval, and server can be by this time period, every this time interval, the variation tendency of parking lot free parking space quantity shows with the form of statistical graph.
6, mobile intelligent terminal inquiry and reservation: server allows mobile intelligent terminal remote access, checks dead ship condition the go forward side by side reservation of driving position and management.When mobile intelligent terminal sends when reserve requests, server can judge current whether available free parking stall, if available free parking stall is returned to the successful information of reservation, and a parking stall is labeled as to reservation.Otherwise return to the information that reservation is failed.If user sails vehicle into parking stall at the appointed time, this parking stall is changed into and being taken by preengaging mark, if user does not sail vehicle into parking stall at the appointed time, regain the parking stall of being preengage, be again labeled as the free time.
As shown in Figure 5, the built-in interactive operation system of intelligent movable equipment, includes but not limited to: smart mobile phone, iPad panel computer etc.Mobile intelligent terminal can be realized: the long-range look facility that real-time parking information is shown; The remote reserved function on reservation parking stall.
In the time that user passes through mobile intelligent terminal connection server, server can return to the occupied information on all parking stalls, and the form with picture shows in client, facilitates user to check that parking stall takies the seizure condition on number and each parking stall.
In the time of user click reservation function, whether successfully server can be carried out and preengage and return client reservation message.If preengage successfully, the while is in the position, parking stall of client explicit reservation.
Claims (5)
1. the intelligent parking detection system based on wireless sensor network, is characterized in that: this system comprises multiple detection node, an aggregation node, a server and multiple mobile intelligent terminal; Detection node is deployed in below each parking stall, for detection of the variation in magnetic field, parking stall, has judged whether vehicle parking; The result of detection node judgement is sent by wireless, is received by aggregation node; Aggregation node is analyzed content and the source of packet, and uploads onto the server by USB serial ports; Server shows, processes and add up data, and remote access interface is provided; Mobile intelligent terminal, by Internet access services device, obtains parking data and realizes to the function on server reservation parking stall.
2. a kind of intelligent parking detection system based on wireless sensor network according to claim 1, it is characterized in that, described detection node is made up of magnetic field sensor, temperature sensor, microprocessor, storer, LED light, serial ports, level switch module, power supply, radio-frequency module and antenna; Wherein, magnetic field sensor, temperature sensor, storer, LED light, level switch module and RF radio-frequency module are connected with microprocessor, and microprocessor is by Power supply, and serial ports is connected with level switch module, and antenna is connected with RF radio-frequency module; Three axial magnetic field intensitys of magnetic field sensor measurement space rectangular coordinate system; The temperature of temperature sensor measurement sensor position; The measurement data of microprocessor receiving sensor is also processed; The code of memory stores detection node operation; LED light shows parking stall seizure condition in real time; Serial ports and level switch module uploading detection station code; Power supply is detection node power supply; Detection node data after treatment send with the form of radiowave by radio-frequency module and antenna.
3. a kind of intelligent parking detection system based on wireless sensor network according to claim 1, is characterized in that, described aggregation node is made up of microprocessor, storer, LED light, serial ports, level switch module, radio-frequency module and antenna; Wherein, storer, LED light, level switch module and RF radio-frequency module are connected with microprocessor, and microprocessor is by Power supply, and serial ports is connected with level switch module, and antenna is connected with RF radio-frequency module; The code of memory stores aggregation node operation, the packet that detection node is sent is received in LED light instruction, microprocessor receives the packet that detection node is sent, packet is analyzed, judge source and the content of packet, and during analysis result is uploaded onto the server, serial ports and level switch module are uploaded aggregation node code, transmit data for aggregation node to server simultaneously; Radio-frequency module and antenna are used for receiving the packet that detection node is sent, and send synch command to detection node.
4. a kind of intelligent parking detection system based on wireless sensor network according to claim 1, is characterized in that: the described server course of work is as follows:
(1) carry out serial ports read operation: server is monitored the serial ports of aggregation node by a thread, to obtain the Monitoring Data in radio sensor network monitoring region;
(2) resolution data bag: in the time that serial ports receives data, the packet that watcher thread reception aggregation node is sent by serial ports is also analyzed, if data layout conforms to, packet content is resolved, obtain the information such as node number, dead ship condition of detection node, and send message to main thread;
(3) show in real time: in the time that main thread receives the message that watcher thread sends, according to the information such as node number, dead ship condition of detection node, call Graphics Control, upgrade the dead ship condition of the corresponding parking stall of display interface;
(4) write into Databasce: main thread connection data storehouse, by the node number of monitoring node, dead ship condition, receive that the information such as the moment of data are written in database;
(5) historical statistics: after information write into Databasce, user can select the statistical function of server, specify some time periods and the time interval, server can be by this time period, every this time interval, the variation tendency of parking lot free parking space quantity shows with the form of statistical graph;
(6) mobile intelligent terminal inquiry and reservation: server allows mobile intelligent terminal remote access, checks dead ship condition the go forward side by side reservation of driving position and management; In the time that mobile intelligent terminal sends reserve requests, server can judge current whether available free parking stall, if available free parking stall, returns to the successful information of reservation, and a parking stall is labeled as to reservation, otherwise return to the information that reservation is failed, if user sails vehicle into parking stall at the appointed time, this parking stall is changed into and being taken by preengaging mark, if user does not sail vehicle into parking stall at the appointed time, regain the parking stall of being preengage, be again labeled as the free time.
5. a kind of intelligent parking detection system based on wireless sensor network according to claim 1, is characterized in that: described mobile intelligent terminal can be realized: the long-range look facility that real-time parking information is shown; The remote reserved function on reservation parking stall;
In the time that user passes through mobile intelligent terminal connection server, server can return to the occupied information on all parking stalls, and the form with picture shows on mobile intelligent terminal, facilitates user to check that parking stall takies the seizure condition on number and each parking stall;
In the time of user click reservation function, whether successfully server can be carried out and preengage and return client reservation message; If preengage successfully, the while is in the position, parking stall of mobile intelligent terminal explicit reservation.
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