CN102347970B - Mesh wireless sensor network-based intelligent parking detection device - Google Patents
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Abstract
The invention discloses a Mesh wireless sensor network-based intelligent parking detection device. The intelligent parking detection device comprises a vehicle detection sensor, a wireless forwarder, a wireless gateway and a background server, wherein the vehicle detection sensor is directly connected with the wireless gateway through a short range wireless communication network or is connected with the wireless gateway through a wireless communication network via the wireless forwarder; and the wireless gateway is connected with the background server through a communication network.
Description
Technical field
The invention belongs to a kind of parking checkout gear, specifically a kind of intelligent parking checkout gear based on Mesh radio sensing network.
Background technology
Existing parking checkout gear often adopts single detection means, and stop, especially road parking there is very complicated applied environment, be faced with multiple interference, thus cause vehicle detection accuracy rate not enough.On the other hand, Most current vehicle detection wireless network adopts the star framework of single-hop (Single Hop), and network service lacks redundant path, communication reliability is lower, cost is higher.
Summary of the invention
The object of the invention is to work out a kind of intelligent parking checkout gear based on Mesh radio sensing network.
The present invention is to solve existing parking checkout gear accuracy of detection is low, accuracy rate is not high and the problem of wireless communication poor stability.
For realizing object of the present invention, the present invention adopts following technical scheme:
It comprises vehicle detecting sensor, wireless repeater, radio network gateway and background server, vehicle detecting sensor is directly connected with radio network gateway by short-distance wireless communication network, or be connected with radio network gateway through wireless repeater by cordless communication network, radio network gateway is connected with background server by communication network.
The function of described vehicle detecting sensor is: wireless senser is connected with radio network gateway by short-distance wireless communication network (the IPv6 wireless Mesh netword as based on 6LowPAN), uploading detection data, and accept instruction that backstage forwarded by radio network gateway, carry out firmware renewal etc.
The function of described wireless repeater is: as the extension of radio network gateway, beyond radio network gateway communication range or signal of communication more weak position the switching of vehicle detecting sensor and radio network gateway is provided, thus expand network coverage, improve the stability of network service, reduce network construction cost.
The function of described radio network gateway is: be directly connected with vehicle detecting sensor with vehicle detecting sensor or forward through wireless repeater by short-distance wireless Mesh network communication (the IPv6 wireless Mesh netword as based on 6LowPAN), collection vehicle Detection Information also uploads to background server; Or accept backstage instruction, configuration control vehicle detecting sensor; Or the transducer firmware receiving backstage transmission upgrades instruction and software, upgrades the firmware of vehicle detecting sensor.
The function of described background server is: comprise the service of parking stall measure sensor management, database service, map geographic information service.Wherein, the service of parking stall measure sensor management parks information, monitoring also configuration management parking stall measure transducer, remote update transducer firmware software for the parking stall receiving the transmission of parking space information transducer.Database service is for the parking stall data of preserving parking stall measure transducer and producing and the state information of parking sensor.Map geographic information service provides the parking space state information displaying based on cartographic information, thus for administrative staff provide intuitively administration interface, provide parking guidance service for person for driving a car.
Described vehicle detecting sensor comprises sensor chip, microcontroller, wireless transmission RF chip, battery; Be connected by universal serial bus between microcontroller with wireless transmission RF chip, described universal serial bus comprises UART, I2C, SPI; Be connected by universal serial bus between MCU with sensor chip, described universal serial bus comprises UART, I2C, SPI, or by the signal of the direct pick-up transducers chip of ADC of MCU.
The function of sensor chip: the events of parking such as detection vehicle arrives, leave;
The function of microcontroller: control, the operation of management of sensor chip line correlation of going forward side by side calculates; Control and manage RF chip to carry out radio communication.
The function of wireless transmission RF chip: for being passed by Wireless Mesh communication network transmission vehicle detecting information, vehicle detection
Sensor monitoring and control information, firmware software renewal etc.Battery: supply power.
Described sensor chip selects following at least one: three axle earth induction chips, reflection infrared sensor, acoustic sensor;
Three axle earth induction chips are connected with microcontroller by universal serial bus, and described universal serial bus comprises UART, I2C, SPI; Reflection infrared sensor is connected to the ADC of microcontroller; Acoustic sensor is connected to the ADC of microcontroller;
The function of three axle geomagnetism detecting chips detects magnetic field of the earth, when large scale of construction metal objects such as having vehicle enters/leave adjacent area, judges that vehicle arrives according to correspondingly changes of magnetic field, park, leaves and dependent event.
Control according to system cost, difference that accuracy of detection requires, these three kinds of transducers can selectively Magnetic Sensor, reflection infrared sensor be connected to MCU on or selection earth magnetism+infrared, combination of two that earth magnetism+sound is quick or the quick mode of earth magnetism+infrared+sound separately.
When wireless senser and radio network gateway close together or signal quality higher time, vehicle detecting sensor is directly connected with radio network gateway by short-distance wireless communication network; When wireless senser and radio network gateway is distant or signal quality is lower time, by wireless repeater relaying, communicate with radio network gateway.
Short-distance wireless communication network has Mesh MANET function, and a wireless senser is connected with more than one wireless repeater, radio network gateway, forms redundant path, reaches and have stronger antijamming capability under complex environment.
The main communication module that radio network gateway comprises short-distance wireless communication module, is connected with backbone network, main communication module comprises at least one in WiFi, GPRS, CDMA, Ethernet module, and radio network gateway power supply selects civil power or solar cell.
Wireless repeater should comprise short-distance wireless communication module, is transmitted to radio network gateway for receiving sensor uploading data, or receive radio network gateway instruction and under pass to transducer; The power supply that transponder connects comprises civil power, solar cell.
The structure of three axle geomagnetism detecting chips comprises: three AMR(Anisotropic Magneto-Resistive) sensing unit and ASIC integrated signal processing module.Three AMR unit detect the earth magnetic field signal of x, y, z three each other in vertical direction respectively, and integrated signal processing module is gathered by inner ADC and processed the detection signal of AMR.After the process of integrated signal processing module, the earth magnetic field signal detected sends outside microcontroller (process) device MCU with digitized form to by I2C bus, thus improve the integrated level of system, eliminate the demand to outside A/D converter, strengthen the stability of signal.
Axle geomagnetism detecting chip is 3 axle earth induction transducers of U.S. new MMC314 × MS chip of (MEMSIC) company, the HMC 5883L chip of Honeywell or other similar performances.
Reflection infrared sensor comprises infrared emission unit and receiving unit, detected by receiving element after the infrared light that transducer sends is reflected by the object, then go out distance between transducer and object according to the property calculation of signal returned or according to signal characteristic determine sensor front with or without object, described reflection infrared sensor comprises Sharp GP2Y0A02YK0F.
Acoustic sensor comprises piezoelectric acoustic sensor, condenser type acoustic sensor, for the feature of noise detecting vehicle motor, clutch, brake and other functional part produce, thus arrive according to vehicle, noise pedigree feature when leaving makes correct judgement.
Advantage of the present invention is:
The present invention is Optimal performance in vehicle detection means and network service two, thus improves the performances such as entire system stability, accuracy.In vehicle detection means, comprehensively have employed the multiple detection meanss such as earth magnetism, infrared, sound is quick, greatly can improve the accuracy rate of vehicle detection.Meanwhile, network communication adopts if 6LowPAN etc. is based on many redundancy structures of Mesh, provides many backup paths of the transfer of data existed in network interferences situation, improves the stability of system data communication transfer.
Accompanying drawing explanation
Fig. 1 is the structural relation figure of each device of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described further.
As shown in the figure, the present invention includes vehicle detecting sensor, wireless repeater, radio network gateway and background server, it is characterized in that vehicle detecting sensor is directly connected with radio network gateway by short-distance wireless communication network, or be connected with radio network gateway through wireless repeater by cordless communication network, radio network gateway is connected with background server by communication network;
The function of described vehicle detecting sensor is: wireless senser is connected with radio network gateway by short-distance wireless communication network (the IPv6 wireless Mesh netword as based on 6LowPAN), uploading detection data, and accept instruction that backstage forwarded by radio network gateway, carry out firmware renewal etc.
The function of described wireless repeater is: as the extension of radio network gateway, beyond radio network gateway communication range or signal of communication more weak position the switching of vehicle detecting sensor and radio network gateway is provided, thus expand network coverage, improve the stability of network service, reduce network construction cost.
The function of described radio network gateway is: be directly connected with vehicle detecting sensor with vehicle detecting sensor or forward through wireless repeater by short-distance wireless Mesh network communication (the IPv6 Wireless Mesh as based on 6LowPAN), collection vehicle Detection Information also uploads to background server; Or accept backstage instruction, configuration control vehicle detecting sensor; Or the transducer firmware receiving backstage transmission upgrades instruction and software, upgrades the firmware of vehicle detecting sensor.One or more radio network gateway can be configured according to system area coverage, capacity requirement in network.
The function of described background server is: comprise the service of parking stall measure sensor management, database service, map geographic information service.Wherein, the service of parking stall measure sensor management parks information, monitoring also configuration management parking stall measure transducer, remote update transducer firmware software for the parking stall receiving the transmission of parking space information transducer.Database service is for the parking stall data of preserving parking stall measure transducer and producing and the state information of parking sensor.Map geographic information service provides the parking space state information displaying based on cartographic information, thus for administrative staff provide intuitively administration interface, provide parking guidance service for person for driving a car.
Vehicle detecting sensor, wireless repeater and radio network gateway adopt Mesh wireless sense network to connect networking each other.
Described communication network comprises cell phone network, WiFi or Ethernet, and radio network gateway is connected with background server by these communication networks;
Described vehicle detecting sensor comprises sensor chip, microcontroller, wireless transmission RF chip, battery;
Be connected by universal serial bus between microcontroller with wireless transmission RF chip, described universal serial bus comprise UART, I2C,
SPI。
Be connected by universal serial bus between MCU with sensor chip, described universal serial bus comprises UART, I2C, SPI, or logical
Cross the signal of the direct pick-up transducers chip of ADC of MCU.
The function of sensor chip: the events of parking such as detection vehicle arrives, leave;
The function of microcontroller: control, the operation of management of sensor chip line correlation of going forward side by side calculates; Control and manage RF chip to carry out radio communication.
The function of wireless transmission RF chip: for passing through Wireless Mesh communication network transmission vehicle detecting information, vehicle detection sensing
Device monitoring and control information, firmware software renewal etc.
Battery: supply power.
Described sensor chip selects following at least one: three axle earth induction chips, reflection infrared sensor, acoustic sensor;
Three axle earth induction chips are connected with microcontroller by universal serial bus, and described universal serial bus comprises UART, I2C, SPI; Reflection infrared sensor is connected to the ADC of microcontroller; Acoustic sensor is connected to the ADC of microcontroller;
The function of three axle geomagnetism detecting chips detects magnetic field of the earth, when large scale of construction metal objects such as having vehicle enters/leave adjacent area, judges that vehicle arrives according to correspondingly changes of magnetic field, park, leaves and dependent event.
Control according to system cost, difference that accuracy of detection requires, these three kinds of transducers can selectively Magnetic Sensor, reflection infrared sensor be connected to MCU on or selection earth magnetism+infrared, combination of two that earth magnetism+sound is quick or the quick mode of earth magnetism+infrared+sound separately.
When wireless senser and radio network gateway close together or signal quality higher time, vehicle detecting sensor is directly connected with radio network gateway by short-distance wireless communication network; When wireless senser and radio network gateway is distant or signal quality is lower time, by wireless repeater relaying, communicate with radio network gateway.
Short-distance wireless communication network has Mesh MANET function, and a wireless senser is connected with more than one wireless repeater, radio network gateway, forms redundant path, reaches and have stronger antijamming capability under complex environment.
The main communication module that radio network gateway comprises short-distance wireless communication module, is connected with backbone network, main communication module comprises at least one in WiFi, GPRS, CDMA, Ethernet module, and radio network gateway power supply selects civil power or solar cell.
Wireless repeater should comprise short-distance wireless communication module, is transmitted to radio network gateway for receiving sensor uploading data, or receive radio network gateway instruction and under pass to transducer; The power supply that transponder connects comprises civil power, solar cell.
The structure of three axle geomagnetism detecting chips comprises: three AMR(Anisotropic Magneto-Resistive) sensing unit and ASIC integrated signal processing module.Three AMR unit detect the earth magnetic field signal of x, y, z three each other in vertical direction respectively, and integrated signal processing module is gathered by inner ADC and processed the detection signal of AMR.After the process of integrated signal processing module, the earth magnetic field signal detected sends outside microcontroller (process) device MCU with digitized form to by I2C bus, thus improve the integrated level of system, eliminate the demand to outside A/D converter, strengthen the stability of signal.
Above-mentioned three axle geomagnetism detecting chip core unit are three AMR(Anisotropic Magnetoresistive) induction module, the axial vertical direction each other of its magnetic field detection.In conventional magnetic induction technology, the detection range of AMR is best suited for earth induction application.Earth magnetic field can be approximately and be uniformly distributed in undisturbed situation, but when there being large scale of construction metal object to enter surveyed area, earth magnetic field will produce distortion on object direct of travel and direct of travel vertical plane.By detecting the disturbing signal feature in earth magnetic field, can monitor vehicle arrival, leave event, and judge type of vehicle.
Be different from two conventional axle geomagnetism detecting chips, three axle geomagnetism detecting chips can detect earth magnetic field object direct of travel, with
And the distortion that direct of travel vertical plane produces, thus can detect more accurately, judge the events such as vehicle arrives, leave.In practice, in order to shortcut calculation, three geomagnetism detectings axially can be set to advance with vehicle to advance with vehicle in parallel direction, horizontal plane vertical direction, with three axis such as horizontal plane direction.
Three axle geomagnetism detecting chips are 3 axle earth induction transducers of U.S. new MMC314 × MS chip of (MEMSIC) company, the HMC 5883L chip of Honeywell or other similar performances.
Reflection infrared sensor comprises infrared emission unit and receiving unit, detected by receiving element after the infrared light that transducer sends is reflected by the object, then go out distance between transducer and object according to the property calculation of signal returned or according to signal characteristic determine sensor front with or without object, described reflection infrared sensor comprises Sharp GP2Y0A02YK0F.
Acoustic sensor comprises piezoelectric acoustic sensor, condenser type acoustic sensor, for the feature of noise detecting vehicle motor, clutch, brake and other functional part produce, thus arrive according to vehicle, noise pedigree feature when leaving makes correct judgement.
MCU selects MSP430F2618, MSP430F5418, MSP430F5418 of 16 of Texas Instruments super low-power consumptions or other similar super low-power consumption MCU, RF selects the low-power consumption radio-frequency (RF) transceiver such as CC1101, CC1100E or CC2520 of Texas Instruments, works in the common frequency band lower than 1 GHz or 2.4GHz such as 433MHz, 470MHz, 868MHz, 915MHz.
Battery is two joints or four joint No. 5 high capacity cells or solar energy charging batteries.
Based on the MANET of Mesh framework, form many redundant paths, thus under complex environment, there is stronger antijamming capability; In MANET process, vehicle detecting sensor detects the wireless connections with contiguous transponder, radio network gateway, and automatically choose several transponders of interference free performance optimum, radio network gateway is father node; Transponder, in MANET process, follows same principle, is connected with the transponder of some stability optimums, radio network gateway.
Claims (9)
1. the intelligent parking checkout gear based on Mesh radio sensing network, comprise vehicle detecting sensor, wireless repeater, radio network gateway and background server, it is characterized in that vehicle detecting sensor is directly connected with radio network gateway by short-distance wireless communication network, or be connected with radio network gateway through wireless repeater by cordless communication network, radio network gateway is connected with background server by communication network;
The function of described vehicle detecting sensor is: wireless senser is connected with radio network gateway by short-distance wireless communication network, uploading detection data, and accepts instruction that backstage forwarded by radio network gateway, carries out firmware renewal;
The function of described wireless repeater is: as the extension of radio network gateway, beyond radio network gateway communication range or signal of communication more weak position the switching of vehicle detecting sensor and radio network gateway is provided, thus expand network coverage, improve the stability of network service, reduce network construction cost;
The function of described radio network gateway is: be directly connected with vehicle detecting sensor with vehicle detecting sensor or forward through wireless repeater by the communication of short-distance wireless Mesh network, collection vehicle Detection Information also uploads to background server; Or accept backstage instruction, configuration control vehicle detecting sensor; Or the transducer firmware receiving backstage transmission upgrades instruction and software, upgrades the firmware of vehicle detecting sensor;
The function of described background server is: comprise the service of parking stall measure sensor management, database service, map geographic information service; Wherein, the service of parking stall measure sensor management parks information, monitoring also configuration management parking stall measure transducer, remote update transducer firmware software for the parking stall receiving the transmission of parking space information transducer; Database service is for the parking stall data of preserving parking stall measure transducer and producing and the state information of parking sensor; Map geographic information service provides the parking space state information displaying based on cartographic information, thus for administrative staff provide intuitively administration interface, provide parking guidance service for person for driving a car;
Described vehicle detecting sensor comprises sensor chip, microcontroller, wireless transmission RF chip, battery; Be connected by universal serial bus between microcontroller with wireless transmission RF chip; Be connected by universal serial bus between MCU with sensor chip; Described universal serial bus comprises UART, I2C, SPI;
The function of sensor chip: detect vehicle and arrive, leave the event of parking;
The function of microcontroller: control, the operation of management of sensor chip line correlation of going forward side by side calculates; Control and manage RF chip to carry out radio communication;
The function of wireless transmission RF chip: for passing through Wireless Mesh communication network transmission vehicle detecting information, vehicle detection sensing
Device monitoring upgrades with control information, firmware software;
Battery: supply power;
Described sensor chip selects following at least one: three axle earth induction chips, reflection infrared sensor, acoustic sensor.
2. the intelligent parking checkout gear based on Mesh radio sensing network according to claim 1, is characterized in that vehicle detecting sensor, wireless repeater and radio network gateway adopt Mesh wireless sense network to connect networking each other.
3. the intelligent parking checkout gear based on Mesh radio sensing network according to claim 1, is characterized in that described communication network comprises cell phone network, WiFi or Ethernet, and radio network gateway is connected with background server by these communication networks.
4. the intelligent parking checkout gear based on Mesh radio sensing network according to claim 1, is characterized in that three axle earth induction chips are connected with microcontroller by universal serial bus; Reflection infrared sensor is connected to the ADC of microcontroller; Acoustic sensor is connected to the ADC of microcontroller;
The function of three axle geomagnetism detecting chips detects magnetic field of the earth, when there being the large scale of construction metal object of vehicle to enter/leave adjacent area, judging that vehicle arrives according to correspondingly changes of magnetic field, park, leaving and dependent event.
5. the intelligent parking checkout gear based on Mesh radio sensing network according to claim 1, it is characterized in that the structure of three axle geomagnetism detecting chips comprises three AMR induction modules, integrated signal processing module and I2C bus, three AMR induction modules detect the earth magnetic field signal of x, y, z three each other in vertical direction respectively, and integrated signal processing module is gathered by inner ADC and processed the detection signal of AMR; After the process of integrated signal processing module, the earth magnetic field signal detected sends external microcontroller MCU with digitized form to by I2C bus, thus improve the integrated level of system, eliminate the demand to outside A/D converter, strengthen the stability of signal;
Reflection infrared sensor comprises infrared emission unit and receiving element, detected by receiving element after the infrared light that transducer sends is reflected by the object, then go out distance between transducer and object according to the property calculation of signal returned or according to signal characteristic determine sensor front with or without object;
Acoustic sensor comprises piezoelectric acoustic sensor, condenser type acoustic sensor, for the feature of noise detecting vehicle motor, clutch, brake and other functional part produce, thus arrive according to vehicle, noise pedigree feature when leaving makes correct judgement.
6. the intelligent parking checkout gear based on Mesh radio sensing network according to claim 1, is characterized in that three axle geomagnetism detecting chips are MMC314 × MS chip of new company of U.S., the HMC 5883L chip of Honeywell or other three axle earth induction transducers; Microcontroller selects MSP430F2618, MSP430F5418, MSP430F5418 of the super low-power consumption of Texas Instruments or other similar super low-power consumption MCU, RF selects CC1101, CC1100E or CC2520 low-power consumption radio-frequency (RF) transceiver of Texas Instruments, works in 433MHz, 470MHz, 868MHz, 915MHz common frequency band lower than 1 GHz or 2.4GHz; Battery is two joints or four joint No. 5 high capacity cells or solar energy charging batteries.
7. the intelligent parking checkout gear based on Mesh radio sensing network according to claim 1, it is characterized in that when wireless senser and radio network gateway close together or signal quality higher time, vehicle detecting sensor is directly connected with radio network gateway by short-distance wireless communication network; When wireless senser and radio network gateway is distant or signal quality is lower time, to be connected with radio network gateway by wireless repeater relaying and to communicate.
8. the intelligent parking checkout gear based on Mesh radio sensing network according to claim 1, it is characterized in that described short-distance wireless communication network has Mesh MANET function, a wireless senser is connected with more than one wireless repeater, radio network gateway, form redundant path, reach and have stronger antijamming capability under complex environment;
In MANET process, vehicle detecting sensor detects the wireless connections with contiguous transponder, radio network gateway, and automatically choose several transponders of interference free performance optimum, radio network gateway is father node; Transponder, in MANET process, follows same principle, is connected with the transponder of some stability optimums, radio network gateway.
9. the intelligent parking checkout gear based on Mesh radio sensing network according to claim 1, it is characterized in that the main communication module that radio network gateway comprises short-distance wireless communication module, is connected with backbone network, main communication module comprises at least one in WiFi, GPRS, CDMA module, and radio network gateway power supply selects civil power or solar cell; Wireless repeater comprises short-distance wireless communication module, is transmitted to radio network gateway for receiving sensor uploading data, or receive radio network gateway instruction and under pass to transducer; The power supply that transponder connects comprises civil power, solar cell.
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| CN103258443A (en) * | 2013-04-18 | 2013-08-21 | 中山市路讯智能交通科技有限公司 | Wireless stall state sensor and stall state sensing method |
| CN103258441A (en) * | 2013-04-18 | 2013-08-21 | 中山市路讯智能交通科技有限公司 | Parking space state sensing system and parking space state sensing and indicating device |
| CN103441911B (en) * | 2013-08-28 | 2016-06-15 | 大唐移动通信设备有限公司 | Based on the intelligent parking management method of snmp protocol, intelligent parking system and gateway |
| CN104240473A (en) * | 2014-08-19 | 2014-12-24 | 上海宏力达信息技术有限公司 | Wireless communication module with novel transmission way |
| ES2550376B2 (en) * | 2015-06-18 | 2017-03-16 | Seat, S.A. | Procedure for detecting the position of a parked vehicle |
| CN105957397A (en) * | 2016-06-24 | 2016-09-21 | 齐鲁工业大学 | Intelligent parking integrated system based on Internet of things |
| CN106304241B (en) * | 2016-09-09 | 2021-07-06 | 北京三快在线科技有限公司 | Data transmission method, repeater and gateway |
| CN106340203B (en) * | 2016-09-26 | 2019-02-19 | 湖北双可智能工程有限公司 | A kind of parking stall real-time detecting system and detection method |
| CN106548658A (en) * | 2016-11-22 | 2017-03-29 | 广西大学 | A kind of wireless anti-interference parking stall measure system of earth magnetism sensing |
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| CN106875740A (en) * | 2017-04-26 | 2017-06-20 | 武汉拓宝科技股份有限公司 | Joint earth's magnetic field and the method for detecting parking stalls and system of radio signal quality |
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