CN106060150A - Vehicle information wireless collection method based on Internet of Vehicles - Google Patents
Vehicle information wireless collection method based on Internet of Vehicles Download PDFInfo
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- CN106060150A CN106060150A CN201610475457.7A CN201610475457A CN106060150A CN 106060150 A CN106060150 A CN 106060150A CN 201610475457 A CN201610475457 A CN 201610475457A CN 106060150 A CN106060150 A CN 106060150A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
The invention provides a vehicle information wireless collection method based on an Internet of Vehicles. The method comprises the steps of establishing a vehicle internal wireless sensor network between a terminal sensor node and a WSN coordinator through IEEE 802.15.4 wireless communication; the WSN coordinator receives data information sent by the terminal sensor node through a wireless network and transmits the data information to a monitoring master platform through a serial port, thereby finishing collecting and transmitting internal signals of a motor vehicle. According to the vehicle information wireless collection method based on the Internet of Vehicles, the reliability and timeliness in the wireless transmission process of the data are improved; the power consumption of the node is reduced; the life cycle of the network is prolonged; and reliable wireless data transmission is realized under a complicated electromagnetic environment in the vehicle.
Description
Technical field
The present invention relates to information sensing and collection, particularly to a kind of information of vehicles wireless collection side based on car networking
Method.
Background technology
The consumption demand of China's motor vehicles is vigorous in recent years, and motor vehicles process is constantly accelerated, domestic motor vehicles annual production and
Recoverable amount maintains sustained and rapid growth.User is more and more higher to the requirement of performances of motor vehicles, and the thing followed is the relevant inspection of motor vehicles
Survey technology the most perfect.At present, having two kinds of methods for performances of motor vehicles detection, one is to detect for vehicle traditional performance
Detecting line with the standard automotive of safety test, it needs the bigger test space and more test equipment.Another kind is to use
Testing in road vehicle, directly the portable car-mounted test equipment of real time status in reflection vehicle travel process, its framework uses
Controller carries sensor composition Embedded SoC.In vehicle testing, each test module needs to pacify according to respective function
It is loaded on the different parts of vehicle, data and confession electrical wiring very inconvenient.The portability of on-road emission test is embodied in equipment volume,
Rather than in the connected mode between sensor and equipment.For wireless sensor technology application in on-road emission test, at present
The wireless sensor network major part that each manufacturer is built uses the radio-frequency module of high power consumption, is formed without unified exploitation
Design standard, adds development difficulty and later maintenance cost.
Summary of the invention
For solving the problem existing for above-mentioned prior art, the present invention propose a kind of information of vehicles based on car networking without
Line acquisition method, including:
IEEE 802.15.4 radio communication is utilized to build vehicle interior between end sensor node and WSN coordinator
Wireless sensor network, described WSN coordinator receives, by wireless network, the data message that described end sensor node sends,
Again by Serial Port Transmission to monitoring in total platform, complete collection and the transmission of interior of motor vehicles signal.
Preferably, described WSN coordinator, end sensor node, monitor total platform composition information of vehicles wireless collection system
System, end sensor node reads vehicle local humiture, tire pressure, acceleration and environment monitoring sensor data in real time, to machine
State in motor-car driving process monitors in real time and manages；The various status information of interior of motor vehicles of sensor acquisition, logical
Cross after wireless network sensor is transferred to router, then by coordinator, various information is carried out data compilation, optimal value is defeated
Entering and carry out preserving and carrying out Web Publishing in the data base monitor total platform, client is according to interface IP address recalls information, same
Time monitor total platform and carry out instruction to coordinator and send, coordinator is received and this order is sent out by wireless senser after order again
Delivering to end objectives equipment, terminal acquisition can respond operational order execution action；
Described end sensor node, by the environmental information gathered and vehicle electric subsignal composition Frame, passes through IEEE
802.15.4 wireless sensor network, is forwarded to monitor total platform via router and coordinator with the form of radio wave；WSN
Coordinator sends wake-up signal to the node in network the most successively, and node could will gather after being only waken up
To field data be sent to coordinator, when coordinator collects the information of the transmission of a period of time all end sensors node
After, through the data processing operation of Internet, extracting redundancy and error message, unification uploads to data monitoring and always puts down
Platform；
The data of described information of vehicles wireless acquisition system are transmitted to monitoring total platform and in data base by WSN coordinator
The communication process of storage uses the mode of serial communication；And IEEE 802.15.4 data sensor collection and transmit to WSN coordinate
During device, data are arranged, including different pieces of information being processed, integrate, classify and encapsulating, then according to difference
Information type, be analyzed data message calculating, draw and optimum arrange result, optimal value is transferred to by serial communication
Monitor total platform.
The present invention compared to existing technology, has the advantage that
The present invention proposes a kind of information of vehicles wireless acquisition method based on car networking, strengthens data and had been wirelessly transferred
Reliability in journey and real-time, reduce node power consumption and extend network lifecycle, is finally reached in vehicle interior complexity
Under electromagnetic environment, it is achieved wireless data transmission reliably.
Accompanying drawing explanation
Fig. 1 is the flow chart of information of vehicles wireless acquisition method based on car networking according to embodiments of the present invention.
Detailed description of the invention
Hereafter provide retouching in detail one or more embodiment of the present invention together with the accompanying drawing of the diagram principle of the invention
State.Describe the present invention in conjunction with such embodiment, but the invention is not restricted to any embodiment.The scope of the present invention is only by right
Claim limits, and the present invention contains many replacements, amendment and equivalent.Illustrate in the following description many details with
Thorough understanding of the present invention is just provided.These details are provided for exemplary purposes, and without in these details
Some or all details can also realize the present invention according to claims.
An aspect of of the present present invention provides a kind of information of vehicles wireless acquisition method based on car networking.Fig. 1 is according to this
The information of vehicles wireless acquisition method flow chart based on car networking of inventive embodiments.
The present invention uses IEEE 802.15.4 wireless communication technology to realize building and network number of wireless sensor network
According to transmission, interior of motor vehicles build wireless sensor network, complete collection and the transmission of interior of motor vehicles signal.Vehicle is believed
Breath wireless acquisition system includes monitoring total platform, WSN coordinator and substantial amounts of end sensor node.IEEE 802.15.4WSN
Coordinator is responsible for setting up wireless network and collecting data, needs the data gathered to be divided into vehicle-mounted in the wireless acquisition system of the present invention
With environmental monitoring two parts, end sensor node is responsible for detecting data and gathering, is then passed through wireless radio frequency modules
Transmitting, coordinator receives, by wireless network, the data message that end sensor node sends, then is arrived by Serial Port Transmission
Monitoring in total platform, the responsibility monitoring total platform is to check data and store.The wireless acquisition system design of the present invention
Data collecting system on the one hand enhance reliability and the high efficiency of data information transfer in system, on the other hand greatly reduce
Sensor node installation, the workload of maintenance.
It is many that information of vehicles wireless acquisition system reads vehicle local humiture, tire pressure, acceleration and environmental monitoring etc. in real time
Kind sensing data, and the topology of personal management and wireless sensor network can be carried out, in order to take correlation means to incite somebody to action in time
The event of burst is reported to the police and processes, and more efficiently, accurately to the state during motor-driven vehicle going monitors in real time
With management.
Information of vehicles wireless acquisition system is total by real time data acquisition module, data communication, Treatment Analysis module and monitoring
Platform, mobile client form.Under the conditions of low cost of, equipment few at the transmission quantity of data etc., this data collecting system is passed through
The various kinds of sensors being placed on vehicle body gathers the various status information of interior of motor vehicles, is transferred to by wireless network sensor
After router, then by coordinator, various information is carried out data compilation, optimal value is input to monitor the data base of total platform
In carry out preserving and carrying out Web Publishing, client can monitor total platform to coordinator according to interface IP address recalls information simultaneously
Carrying out instruction to send, this order is sent to end objectives equipment by wireless senser after receiving order by coordinator again, eventually
End collecting device can respond operational order execution action.
Each node carries multiple sensors, and the environmental information gathered and vehicle electric subsignal are formed Frame, with
The form of radio wave is forwarded to monitor total platform, IEEE 802.15.4 technical data transmission lattice via router and coordinator
Formula is simple, volume of transmitted data is few, capacity of resisting disturbance is strong, is particularly well-suited to the exploitation of the wireless acquisition system of the present invention, scene
Sensor device with the Form Characteristic automatic network-building of wireless sensor node, and can save substantial amounts of installation work.Therefore
Data collecting system is divided into lower module by the present invention.
Data acquisition module includes Temperature Humidity Sensor, tyre pressure sensor, light sensor, acceleration transducer, it is achieved
Vehicle-mounted and environment each sensor data information collection, and the analogue signal collected is converted into the accessible numeral of Centroid
Signal, waits command sending data information, followed by IEEE 802.15.4 wireless sensor network, the data received is sent out
Deliver to higher level's module.
WSN coordinator needs successively the node in network to be sent wake-up signal after receiving the request, and node only has quilt
The field data collected could be sent to coordinator after waking up up, when coordinator collects a period of time all end sensors
After the information of the transmission of node, through the data processing operation of Internet, extracting redundancy and error message, unification is uploaded
To the total platform of data monitoring.
Data communication module is made up of two large divisions, and Part I is that the data of end sensor node collection are through router
Redirecting and be transferred to WSN coordinator, Part II is that data are transmitted to monitoring total platform by WSN coordinator, and deposits in data base
Storage.Therefore data communication module needs to use two kinds of communication modes differed: what two parts were respectively adopted is based on IEEE
802.15.4 the cordless communication network of technology, and use the mode of serial communication to upload.At data acquisition phase, bottom IEEE
802.15.4 data acquisition node quantity is the most, needs to collect a large amount of sensor information, and sensor information similarity is higher, superfluous
Remaining information is more, so needing to arrange data.Science and engineering at the data that data compilation module is responsible in network transmission process
Make, need different pieces of information to be processed, integrate, classify and encapsulates, then according to different information types, data message is entered
Row analytical calculation, draws optimum arrangement result, is transferred to monitor on total platform by serial communication by optimal value.Whole module sets
The thought of meter is desirable to be communicatively coupled with monitoring total platform by the wireless sensor network of bottom, it is achieved motor vehicles is believed
The wireless monitor of breath wireless acquisition system and management.
Monitor total platform and read vehicle-mounted internal state information and test environment monitoring information in real time, and data are processed
With storage, send alarm signal when a certain sensing data exceedes threshold value to the total platform of monitoring, monitor total platform according to node
The unique address information rapid alignment sensor node location of configuration.Additionally, monitor total platform state also to different sensors
Information and control function have selectable function；Data show in real time and inquire about；Data show, data preserve and parameter sets
Put.
The compound mode of sing on web Service+Android client realizes mobile terminal scheme, and monitoring total platform will
Test data and analysis result encapsulation are published in WebService, and Android client is called WebService information and solves
Analyse into desired data, grasp test information and analysis result in real time.
WSN coordinator is that the data transmit-receive center of whole wireless network, router and end sensor node all pass through
It and monitor and between total platform, carry out data exchange.After WSN coordinator powers on, first carry out hardware and Protocol Stack operation system
Initialize, then perform network and set up operation, during setting up network, include scan channel, select channel, node address to divide
Join operation, the most just can start coordinator and set up a new IEEE 802.15.4 wireless network.
After router and end sensor node add network smoothly, end sensor node first to send a request
Order, coordinator monitors, after receiving request command, the data channel distributed, it is ensured that returns after channel idle and allows order, terminal
Sensor node could start to send data message after receiving permission order, thus avoids information collision and channel blocking.
After spatial data being detected, it is judged that the availability of data message, after rejecting redundancy and error message, by node
Various information encapsulation, compression by Serial Port Transmission give monitor total platform carry out showing and storing, coordinator subsequently enters sleep
State.
Router as in wireless network data redirect node, be responsible for receive end sensor node data information, whole
WSN coordinator is forwarded the data to after reason data message.Router work process can be divided into route search to initialize, receive route
Command frame, receiving acknowledgement command frame, work includes that data receiver, data compression, packet loss detection, selection optimal path are in case major structure
Become data jamming, complete to play while data forward the effect of Optimization of Energy Saving.The wireless acquisition system Zhong Dang road of the present invention
Also carried sensor by device, while it completes routing function, also can carry out the data acquisition function of end sensor node.
The effect of end sensor node is the various sensor informations in collecting test environment, finally sends through router
To WSN coordinator, therefore the work after its power-up initializing is the position that scanning channel determines whether there is network and coordinator,
Being attached with WSN coordinator immediately after discovery confirming, after success, it just can be vehicle-mounted according to the instruction acquisition of coordinator transmission
With the Various types of data of environmental monitoring, being then uploaded in coordinator by data message, free time, it was just in sleep state etc.
Treat wake command.After completing to add network, node enters sleep standby mode, upon receipt of the wake command of coordinator
After, detection immediately receives data, and first data frame head and command header to receiving judge, performs corresponding behaviour according to command header
Making, the measured value after gathering stores with the space of 3 bytes, and is sent to monitor total platform after encapsulating data.
Coordinator is connected with the total platform of monitoring by serial ports, monitors total platform and is returned by serial ports transmission control order and reception
Sensing data, in order to improve data managing capacity, need to perform unified data communication lattice inter-node communication in systems
Core coordinator is all the IEEE using the mode of Frame to send out when data are transmitted with the data of the communication monitoring total platform
802.15.4 the form of protocol frame is as follows, and each frame length is 32 bytes, including frame ordering head, address, data, check bit sum frame
Tail forms.
Command header: performed order.
Address :+2 network address of 8 physical address of object module.
Data: include order indications and return data.
Verification: be used for judging that data are the most correct.
Tire pressure monitoring module includes transmitting chip and receives chip, and each binary data bit is modulated into by transmitting chip
Through the signal that 433MHZ electromagnetic wave sends, receive chip and accept, with fixing baud rate, the radiofrequency signal that transmitting chip is launched,
And be demodulated then exporting a binary data bit.Use the mode of down trigger, when there being data transmission, through receiving core
When sheet is converted into low and high level binary data bit arrival monitoring total platform, triggers the total platform of monitoring immediately and carry out this secondary data
Receive.The centre that every secondary data sends has no effect on collection and the process monitoring total other data of platform.
In order to realize the target of real-time, the realization of car-mounted terminal have employed two and gather MCU.It is respectively labeled as
MCU1 and MCU2, MCU1 are responsible for gathering the sensing data of strict requirement of real-time.MCU2, then be responsible for other non-critical real-time
Property require data, as being wirelessly transferred, the most all data are sent by wireless protocols.Lead between MCU1 and MCU2
Crossing serial ports to be connected, all the sensors data that period is collected by MCU1 timing are disposably sent to MCU2, and then MCU2 is responsible for
Send it to coordinator.
Sensor data acquisition module, a serial ports transmitting-receiving of exclusive MCU1 is right.Communicating of MCU1 with MCU2 takies respectively
The transmitting terminal of the serial ports of MCU1, the receiving terminal of the serial ports of MCU2.
The complete operation of MCU1 is: active cycle gathers environmental sensory data, and the passive tire pressure monitoring that receives gathers data, so
Rear unification sends the data to MCU2.First setting up data pool, sensor data acquisition program, as mastery routine, keeps circulation to adopt
Collection, then according to frame format order, writes data pool successively.Every No. 10 sensor real-time data acquisitions are complete, start and once send out
Send program, send jointly to MCU2.
For asynchronous tire pressure data, take extra individually data field.The tire pressure delta data received with interrupt mode
First put into tire pressure data field, and tire pressure Data Labels position is set.Then, before every secondary data is sent to MCU2, mastery routine is first
Check whether tire pressure Data Labels position is set.If set, tire pressure data during explanation, are had completely to receive.The most just by tire pressure number
It is copied to routine data district, then remove tire pressure Data Labels position according to district's data.Finally sensing data and tire pressure will be configured
The data field of data is sent to MCU2.If tire pressure Data Labels position does not has set, do not process, the letter of data field correspondent section
Breath is the data value of last tyre pressure sensor.
MCU2 first carries out the initialization of wireless protocols module, sends configuration order, is programmed parameter, the joining of network parameter
Put and connect with network.Initialize wireless protocols module and after receiving the sensing data that MCU1 transmission comes, proceed by nothing
Wire protocol transmission；The asynchronous mode of interruption is still used to receive the data of MCU1.When after the asynchronous data receiving MCU1, data are set
Receive flag bit.Main program cycle checks whether to receive the sensing data that MCU1 sends, if it is, just by sensing data
It is copied to data field, then sends.
In conjunction with wireless acquisition system network topology structure and the design requirement of the present invention, use a kind of distributed data whole
Adjustment method, respectively according to the data compilation algorithm that himself functional realiey is different on router, coordinator.Use at router
Dynamic clustering routing algorithm；Coordinator uses spatially adaptive weighted data to arrange algorithm；
The present invention dynamically distributes a bunch head using node dump energy as the primary parameter choosing bunch head.By all joints
The dump energy Es of point is converted to a time quantum Δ t as the following formula,
In formula, EsFor the dump energy of node, E0For initial quantity of electricity, τ is maximum latency, NSFor networking number of times, Emin
For becoming the minimum amount of power value of bunch head.
When choosing bunch head, all nodes all wait a unified time delay that sets, and arrive time delay at first be a bunch head, around saves
Point then cancels time delay.
Whether arrange data, depend on coordinator and bunch head distance da, the computing formula of da is as follows:
In formula, EeFor Node compression 1 bit institute consumed energy, n is networking number, and ε represents that signal amplifier is to unit plane
The electricity that long-pending transmitting 1 Bit data is consumed.When coordinator and leader cluster node distance are more than da, carry out data at coordinator whole
Reason.
For coordinator, for the unequal measured value of big accuracy of measurement, weighted value W is used to weigh the difference of different pieces of information
Precision, is multiplied by its optimal weights value respectively by the different pieces of information recorded according to precision, and be then averaged value by the data obtained
Process, finally give the optimum result that arranges:
The measured value X of sensor1、X2、…、XnObtain after recursive estimation computingDistinguish multiply-add weight factor W againiAfter
Summation, obtains optimum arrangement result With weighter factor WiMeet:
Utilizing the relation that output data are separate, it is the most mean square that the n-th sensor kth time measured value calculates temporal-spatial fusion
Error
S is number of sensors, finally gives total mean square error and is:
Wherein σi 2N () is the mean square error that end sensor node tentatively obtains.
In sum, the present invention proposes a kind of information of vehicles wireless acquisition method based on car networking, strengthens data and exists
Reliability during being wirelessly transferred and real-time, reduce node power consumption and extend network lifecycle, being finally reached at vehicle
Under internal complicated electromagnetic environment, it is achieved wireless data transmission reliably.
Obviously, it should be appreciated by those skilled in the art, each module of the above-mentioned present invention or each step can be with general
Calculating system realize, they can concentrate in single calculating system, or be distributed in multiple calculating system and formed
Network on, alternatively, they can realize with the executable program code of calculating system, it is thus possible to by they store
Performed by calculating system within the storage system.So, the present invention is not restricted to the combination of any specific hardware and software.
It should be appreciated that the above-mentioned detailed description of the invention of the present invention is used only for exemplary illustration or explains the present invention's
Principle, and be not construed as limiting the invention.Therefore, that is done in the case of without departing from the spirit and scope of the present invention is any
Amendment, equivalent, improvement etc., should be included within the scope of the present invention.Additionally, claims purport of the present invention
Whole within containing the equivalents falling into scope and border or this scope and border change and repair
Change example.
Claims (2)
1. an information of vehicles wireless acquisition method based on car networking, it is characterised in that including:
IEEE 802.15.4 radio communication is utilized to build vehicle interior between end sensor node and WSN coordinator wireless
Sensor network, described WSN coordinator receives, by wireless network, the data message that described end sensor node sends, then leads to
Cross Serial Port Transmission to monitoring in total platform, complete collection and the transmission of interior of motor vehicles signal.
Method the most according to claim 1, it is characterised in that described WSN coordinator, end sensor node, monitoring are always
Platform composition information of vehicles wireless acquisition system, end sensor node reads vehicle local humiture, tire pressure, acceleration in real time
With environment monitoring sensor data, the state during motor-driven vehicle going is monitored in real time and manages；Sensor acquisition
The various status information of interior of motor vehicles, after being transferred to router by wireless network sensor, then by coordinator by all kinds of letters
Breath carries out data compilation, is input to optimal value to monitor in the data base of total platform and carries out preserving and carrying out Web Publishing, client
End, according to interface IP address recalls information, monitors total platform simultaneously and carries out instruction transmission to coordinator, after coordinator receives order
By wireless senser, this order being sent to end objectives equipment again, terminal acquisition can respond operational order and perform dynamic
Make；
Described end sensor node, by the environmental information gathered and vehicle electric subsignal composition Frame, passes through IEEE
802.15.4 wireless sensor network, is forwarded to monitor total platform via router and coordinator with the form of radio wave；WSN
Coordinator sends wake-up signal to the node in network the most successively, and node could will gather after being only waken up
To field data be sent to coordinator, when coordinator collects the information of the transmission of a period of time all end sensors node
After, through the data processing operation of Internet, extracting redundancy and error message, unification uploads to data monitoring and always puts down
Platform；
The data of described information of vehicles wireless acquisition system are transmitted to monitoring total platform and storing in data base by WSN coordinator
Communication process use serial communication mode；And in IEEE 802.15.4 data sensor collection and transmit to WSN coordinator
During, data are arranged, including different pieces of information being processed, integrate, classify and encapsulating, then according to different letters
Breath type, is analyzed data message calculating, and draws optimum arrangement result, by serial communication, optimal value is transferred to monitoring
Total platform.
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| CN201610475457.7A CN106060150B (en) | 2016-06-24 | 2016-06-24 | Information of vehicles wireless acquisition method based on car networking |
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| CN110213022A (en) * | 2019-06-27 | 2019-09-06 | 深圳市久驰精密科技有限公司 | A kind of communication means and device |
| CN110567523A (en) * | 2019-09-09 | 2019-12-13 | 福建工程学院 | Regional temperature and humidity detection method and device based on Internet of vehicles system |
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| CN106060150B (en) | 2019-09-13 |
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