CN103529811B - A kind of electric automobile car-mounted terminal off-line data compressed cache system and method for work - Google Patents
A kind of electric automobile car-mounted terminal off-line data compressed cache system and method for work Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of electric automobile car-mounted terminal off-line data compressed cache system and method for work, described system comprises: some car-mounted terminals, some car-mounted terminals are communicated with car-mounted terminal data collection module by GPRS cordless communication network, described car-mounted terminal is running into GPRS cordless communication network abnormal problem, during with car-mounted terminal data collection module off-line, off-line data is stored, after electrical changing station is filled in arrival, car-mounted terminal is uploaded to the ZigBee master node filling electrical changing station after all being compressed by off-line data by self-contained ZigBee module; The present invention can when car-mounted terminal be in off-line operation state, by electric automobile GPS information and battery data compressed cache, electric automobile is transferred to center of the centralized monitor when charging station charges by data cached, ensure the complete of vehicle operating track and battery operation data, also meet data convert, carry out the needs of electrokinetic cell flash-over characteristic research.
Description
Technical field
The invention belongs to electric automobile management domain, particularly relate to a kind of electric automobile car-mounted terminal off-line data compressed cache system and method for work.
Background technology
Along with the aggravation of energy crisis and pollution problem, develop and utilize clean energy resource to become inexorable trend, putting before this, electric automobile obtains research and development widely, and the application especially in public transport, obtains significant progress.In electric vehicle development and operation stage, car-mounted terminal is as electric automobile important component part, carrying out playing an important role in issue track debugging, the collection of batteries of electric automobile service data at vehicle, is that electric automobile fills the important leverage of changing electric service network safety, economical operation.
The major function of current car-mounted terminal is collection vehicle GPS information and battery operation data, by GPRS or other wireless communication networks, data are delivered to center of the centralized monitor, the GPS information that center of the centralized monitor storage receives and battery data carry out real-time exhibition and historical data analysis.But, some faults may be there are in car-mounted terminal and center of the centralized monitor communication, as GPRS signal disturbing, underfed, network failure etc., then vehicle GPS information and battery data cannot on deliver to center of the centralized monitor, car-mounted terminal is in off-line operation state, cause electric automobile service data imperfect, vehicle operating track such as completely cannot to show at the problem.
Chinese patent 201010111130.4 discloses a kind of car-mounted terminal, comprises communication unit, man-machine interaction unit, GPS unit and processor, but under not proposing network communication unusual condition car-mounted terminal to the disposal route of data.
Chinese patent 201210222064.7 discloses a kind of electric automobile car-mounted terminal based on cloud computing and using method thereof, comprising: cloud client, communication module, human-computer interaction module, locating module, identification module, electric energy metering module, charge and discharge control module, CAN data-interface.Upload the data to Cloud Server and accept the information that Cloud Server returns, but under not proposing network communication unusual condition, car-mounted terminal, to the disposal route of data, causes service data imperfect.
Chinese patent 201010617096.8 discloses a kind of data transmission method and car-mounted terminal of car-mounted terminal.During data channel generation obstacle between car-mounted terminal and service platform, send note to service platform, adopt the mode of note to transmit data and navigate, but be not suitable for the transmission of electric automobile big data quantity, costly.
Generally speaking, the technical matters needing those skilled in the art urgently to solve at present is: when electric automobile car-mounted terminal is in off-line state, how to ensure that electric automobile service data is not lost, and off-line data is transferred to center of the centralized monitor, to ensure the completing property of service data.
Summary of the invention
Object of the present invention is exactly to solve the problem, a kind of electric automobile car-mounted terminal off-line data compressed cache system and method for work are provided, it can when car-mounted terminal be in off-line operation state, by electric automobile GPS information and battery data compressed cache, electric automobile is transferred to center of the centralized monitor when charging station charges by data cached, the complete of vehicle operating track and battery operation data can be ensured like this, also meet data convert, carry out the needs of electrokinetic cell flash-over characteristic research.
To achieve these goals, the present invention adopts following technical scheme:
A kind of electric automobile car-mounted terminal off-line data compressed cache system, comprising:
Some car-mounted terminals, some car-mounted terminals are communicated with car-mounted terminal data collection module by GPRS cordless communication network, described car-mounted terminal is running into GPRS cordless communication network extremely, during with car-mounted terminal data collection module off-line, off-line data is stored, after electrical changing station is filled in arrival, car-mounted terminal is uploaded to the ZigBee master node filling electrical changing station after all being compressed by off-line data by self-contained ZigBee module; Described off-line data comprises vehicle longitude, latitude, speed, angle and battery information;
ZigBee master node, is installed on and fills electrical changing station, and the data that the car-mounted terminal received is uploaded are sent to car-mounted terminal data collection module;
The data received are stored into real-time data base by car-mounted terminal data collection module;
Described real-time data base changes electric data, car-mounted terminal data etc. for storing filling that center of the centralized monitor receives, and supports Large Copacity quick storage.
Described ZigBee master node comprises some ZigBee routing nodes, ZigBee coordinator node and off-line data receive forwarding server, described some ZigBee routing nodes all with the two-way communication of ZigBee coordinator node, described ZigBee coordinator node and off-line data receive forwarding server two-way communication, the data that described ZigBee routing node is uploaded for gathering car-mounted terminal, data upload is received forwarding server to off-line data by described ZigBee coordinator node, described off-line data receives forwarding server and transfers data to car-mounted terminal data collection module, described ZigBee routing node is used for the reception of car-mounted terminal off-line data, described ZigBee coordinator node is used for the route relaying of ZigBee-network, described off-line data receives parsing and the forwarding that forwarding server is used for off-line data.
Described car-mounted terminal comprises master control borad, described master control borad respectively with monitor board, GPS module, GPRS module, ZigBee module, memory module, power module, display module, key-press module two-way communication, described master control borad and the two-way communication of Vehicular battery management system, obtain battery operation data.
Described monitor board is used for the monitoring and controlling of car-mounted terminal running status.
Described GPS module is used for collection vehicle current location information, comprises vehicle longitude, latitude, speed, angle.
Vehicle position information and battery information are wirelessly sent to the car-mounted terminal data collection module of center of the centralized monitor by described GPRS module.
Described ZigBee module is used for the transmission of offline cache data, by filling ZigBee-network in electrical changing station vehicle offline cache data is transferred to the car-mounted terminal data collection module of center of the centralized monitor.
Described memory module is used for the buffer memory of off-line data; Described power module supplies for the power supply of car-mounted terminal; Described display module, key-press module are used for the information interaction of user and car-mounted terminal, and user selects the car-mounted terminal information that will check by button.
The method of work of said system, mainly comprises the steps:
Step (one): in electric automobile car-mounted terminal operational process, car-mounted terminal data collection module to center of the centralized monitor sends vehicle GPS information and battery operation data, if receive the communication heartbeat of car-mounted terminal data collection module, then stop data buffer storage, proceed to step (five); Receive the communication heartbeat of car-mounted terminal data collection module if fail, think that car-mounted terminal is in off-line state, start the buffer memory carrying out vehicle GPS information and battery operation data, proceed to step (two);
Step (two): car-mounted terminal is in off-line state, car-mounted terminal, according to data compression cache policy, is stored in file after vehicle GPS information and battery operation data being compressed;
Step (three): electric automobile enters charging station and charges, the ZigBee module of car-mounted terminal communicates with the ZigBee master node filled in electrical changing station, and the packed data of buffer memory is transferred to ZigBee master node, and by data cached removing;
The data of reduction are sent to the car-mounted terminal data collection module of center of the centralized monitor by step (four): the packed data received is carried out reverse reduction according to car-mounted terminal data compression cache policy by ZigBee master node;
Step (five): the data received are stored into real-time data base by the car-mounted terminal data collection module of center of the centralized monitor.
Center of the centralized monitor in described step (), for zonal electric automobile fill change electric equipment, electric automobile run Centralized Monitoring and management.
GPS information in described step () comprises: vehicle longitude, latitude, speed, angle;
Battery operation data in described step () comprise: cell voltage, electric current, SOC, monomer ceiling voltage and position, monomer minimum voltage and position, monomer maximum temperature and position, monomer minimum temperature and position and vehicle alarm information;
Described vehicle alarm information comprises that SOC is too low, battery temperature is too high, vehicle insulation fault, battery temperature are too low, electrokinetic cell fault.
The particular content of the data compression cache policy in described step (two) is:
(1), time compress stores: adopt deviation compression mode, create at each storage file and after this in storage file, write current time every 60 minutes, form is #2013-07-1115:55:35, be called material time, after this difference (second) that adopts Current GPS information time to deduct material time represents the time of every bar GPS information.
(2), longitude, latitude compression store: adopt the mode that deviation compression and the maximum deviation time interval combine, a nearest GPS warp stored, latitude are as critical data, Current GPS information warp, latitude carry out mathematic interpolation with critical data respectively, if the difference of longitude or latitude is not 0, then GPS information is preserved, otherwise do not preserve, be called deviation compression; If Current GPS information and the critical data time interval arrive or exceed the maximum deviation time interval (600 seconds), then no matter whether Current GPS information meets the condition of deviation compression, all Current GPS information is stored.
(3), battery data stores: cell voltage, electric current, SOC information can not change substantially when vehicle does not run, therefore battery data is stored with the storage of GPS information, just accurately can reflect the operation conditions of battery, special processing need not be carried out to battery data again.
The data that described car-mounted terminal data collection module stores to real-time data base are all with markers, ensure that the continuity of data.
Beneficial effect of the present invention:
1, the present invention is by carrying out compressed cache by car-mounted terminal off-line data, adopt ZigBee-network to complete data cached transmission when electric automobile charges, ensure that the complete of vehicle operating track and battery operation data, meet the needs carrying out the research of electrokinetic cell flash-over characteristic;
2, the present invention compresses off-line data by adopting rational compression algorithm, under the prerequisite of not drop-out, has both reduced data volume to reduce storage space, additionally reduces data transmission holding time, improves that it transmits, Storage and Processing efficiency;
3, the present invention adopts the off-line data of the ZigBee wireless network transmissions buffer memory in charging station, has higher stability, does not need again to expend network traffics simultaneously, saves expense.
Accompanying drawing explanation
Fig. 1 is system framework schematic diagram of the present invention;
Fig. 2 is car-mounted terminal structural representation of the present invention;
Fig. 3 is workflow diagram of the present invention.
Wherein, 1. car-mounted terminal, 2. master control borad, 3. monitor board, 4.GPS module, 5.GPRS module, 6.ZigBee module, 7. memory module, 8. power module, 9. display module, 10. key-press module, 11. Vehicular battery management systems.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figure 1, a kind of electric automobile car-mounted terminal off-line data compressed cache system, comprising:
Some car-mounted terminals, some car-mounted terminals are communicated with car-mounted terminal data collection module by GPRS cordless communication network, described car-mounted terminal is running into GPRS cordless communication network extremely, during with car-mounted terminal data collection module off-line, off-line data is stored, after electrical changing station is filled in arrival, car-mounted terminal is uploaded to the ZigBee master node filling electrical changing station after all being compressed by off-line data by self-contained ZigBee module; Described off-line data comprises vehicle longitude, latitude, speed, angle and battery information;
ZigBee master node, is installed on and fills electrical changing station, and the data that the car-mounted terminal received is uploaded are sent to car-mounted terminal data collection module;
The data received are stored into real-time data base by car-mounted terminal data collection module;
Described real-time data base changes electric data, car-mounted terminal data etc. for storing filling that center of the centralized monitor receives, and supports Large Copacity quick storage.
Described ZigBee master node comprises some ZigBee routing nodes, ZigBee coordinator node and off-line data receive forwarding server, described some ZigBee routing nodes all with the two-way communication of ZigBee coordinator node, described ZigBee coordinator node and off-line data receive forwarding server two-way communication, the data that described ZigBee routing node is uploaded for gathering car-mounted terminal, data upload is received forwarding server to off-line data by described ZigBee coordinator node, described off-line data receives forwarding server and transfers data to car-mounted terminal data collection module, described ZigBee routing node is used for the reception of car-mounted terminal off-line data, described ZigBee coordinator node is used for the route relaying of ZigBee-network, described off-line data receives parsing and the forwarding that forwarding server is used for off-line data.
As shown in Figure 2, described car-mounted terminal comprises master control borad, described master control borad respectively with monitor board, GPS module, GPRS module, ZigBee module, memory module, power module, display module, key-press module two-way communication, described master control borad and the two-way communication of Vehicular battery management system, obtain battery operation data.
Described monitor board is used for the monitoring and controlling of car-mounted terminal running status.
Described GPS module is used for collection vehicle current location information, comprises vehicle longitude, latitude, speed, angle.
Vehicle position information and battery information are wirelessly sent to the car-mounted terminal data collection module of center of the centralized monitor by described GPRS module.
Described ZigBee module is used for the transmission of offline cache data, by filling ZigBee-network in electrical changing station vehicle offline cache data is transferred to the car-mounted terminal data collection module of center of the centralized monitor.
Described memory module is used for the buffer memory of off-line data; Described power module supplies for the power supply of car-mounted terminal; Described display module, key-press module are used for the information interaction of user and car-mounted terminal, and user selects the car-mounted terminal information that will check by button.
As shown in Figure 3, the method for work of said system, mainly comprises the steps:
Step (one): in electric automobile car-mounted terminal operational process, car-mounted terminal data collection module to center of the centralized monitor sends vehicle GPS information and battery operation data, if receive the communication heartbeat of car-mounted terminal data collection module, then stop data buffer storage, proceed to step (five); Receive the communication heartbeat of car-mounted terminal data collection module if fail, think that car-mounted terminal is in off-line state, start the buffer memory carrying out vehicle GPS information and battery operation data, proceed to step (two);
Step (two): car-mounted terminal is in off-line state, car-mounted terminal, according to data compression cache policy, is stored in file after vehicle GPS information and battery operation data being compressed;
Step (three): electric automobile enters charging station and charges, the ZigBee module of car-mounted terminal communicates with the ZigBee master node filled in electrical changing station, and the packed data of buffer memory is transferred to ZigBee master node, and by data cached removing;
The data of reduction are sent to the car-mounted terminal data collection module of center of the centralized monitor by step (four): the packed data received is carried out reverse reduction according to car-mounted terminal data compression cache policy by ZigBee master node;
Step (five): the data received are stored into real-time data base by the car-mounted terminal data collection module of center of the centralized monitor.
Center of the centralized monitor in described step (), for zonal electric automobile fill change electric equipment, electric automobile run Centralized Monitoring and management.
GPS information in described step () comprises: vehicle longitude, latitude, speed, angle;
Battery operation data in described step () comprise: cell voltage, electric current, SOC, monomer ceiling voltage and position, monomer minimum voltage and position, monomer maximum temperature and position, monomer minimum temperature and position and vehicle alarm information;
Described vehicle alarm information comprises that SOC is too low, battery temperature is too high, vehicle insulation fault, battery temperature are too low, electrokinetic cell fault.
The particular content of the data compression cache policy in described step (two) is:
(1), time compress stores: adopt deviation compression mode, create at each storage file and after this in storage file, write current time every 60 minutes, form is #2013-07-1115:55:35, be called material time, after this difference (second) that adopts Current GPS information time to deduct material time represents the time of every bar GPS information.
(2), longitude, latitude compression store: adopt the mode that deviation compression and the maximum deviation time interval combine, a nearest GPS warp stored, latitude are as critical data, Current GPS information warp, latitude carry out mathematic interpolation with critical data respectively, if the difference of longitude or latitude is not 0, then GPS information is preserved, otherwise do not preserve, be called deviation compression; If Current GPS information and the critical data time interval arrive or exceed the maximum deviation time interval (600 seconds), then no matter whether Current GPS information meets the condition of deviation compression, all Current GPS information is stored.
(3), battery data stores: cell voltage, electric current, SOC information can not change substantially when vehicle does not run, therefore battery data is stored with the storage of GPS information, just accurately can reflect the operation conditions of battery, special processing need not be carried out to battery data again.
The data that described car-mounted terminal data collection module stores to real-time data base are all with markers, ensure that the continuity of data.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (9)
1. the method for work that adopts of electric automobile car-mounted terminal off-line data compressed cache system, it is characterized in that, described system comprises:
Some car-mounted terminals, some car-mounted terminals are communicated with car-mounted terminal data collection module by GPRS cordless communication network, described car-mounted terminal is running into GPRS cordless communication network extremely, during with car-mounted terminal data collection module off-line, off-line data is stored, after electrical changing station is filled in arrival, car-mounted terminal is uploaded to the ZigBee master node filling electrical changing station after all being compressed by off-line data by self-contained ZigBee module; Described off-line data comprises vehicle longitude, latitude, speed, angle and battery information;
ZigBee master node, is installed on and fills electrical changing station, and the data that the car-mounted terminal received is uploaded are sent to car-mounted terminal data collection module;
The data received are stored into real-time data base by car-mounted terminal data collection module;
Described real-time data base changes electric data, car-mounted terminal data for storing filling that center of the centralized monitor receives, and supports Large Copacity quick storage;
Described method comprises the steps:
Step (one): in electric automobile car-mounted terminal operational process, car-mounted terminal data collection module to center of the centralized monitor sends vehicle GPS information and battery operation data, if receive the communication heartbeat of car-mounted terminal data collection module, then stop data buffer storage, proceed to step (five); Receive the communication heartbeat of car-mounted terminal data collection module if fail, think that car-mounted terminal is in off-line state, start the buffer memory carrying out vehicle GPS information and battery operation data, proceed to step (two);
Step (two): car-mounted terminal is in off-line state, car-mounted terminal, according to data compression cache policy, is stored in file after vehicle GPS information and battery operation data being compressed;
Step (three): electric automobile enters charging station and charges, the ZigBee module of car-mounted terminal communicates with the ZigBee master node filled in electrical changing station, and the packed data of buffer memory is transferred to ZigBee master node, and by data cached removing;
The data of reduction are sent to the car-mounted terminal data collection module of center of the centralized monitor by step (four): the packed data received is carried out reverse reduction according to car-mounted terminal data compression cache policy by ZigBee master node;
Step (five): the data received are stored into real-time data base by the car-mounted terminal data collection module of center of the centralized monitor.
2. the method for claim 1, is characterized in that, the center of the centralized monitor in described step (), for zonal electric automobile fill change electric equipment, electric automobile run Centralized Monitoring and management.
3. the method for claim 1, is characterized in that, the GPS information in described step () comprises: vehicle longitude, latitude, speed and angle.
4. the method for claim 1, it is characterized in that, the battery operation data in described step () comprise: cell voltage, electric current, SOC, monomer ceiling voltage and position, monomer minimum voltage and position, monomer maximum temperature and position, monomer minimum temperature and position and vehicle alarm information; Described vehicle alarm information comprises that SOC is too low, battery temperature is too high, vehicle insulation fault, battery temperature are too low and electrokinetic cell fault.
5. the method for claim 1, is characterized in that, the particular content of the data compression cache policy in described step (two) is:
(1), time compress stores: adopt deviation compression mode, create at each storage file and after this in storage file, write current time every 60 minutes, be called material time, after this difference that adopts Current GPS information time to deduct material time represents the time of every bar GPS information;
(2), the compression of longitude, latitude stores: adopt the mode that deviation compression and the maximum deviation time interval combine,
A nearest GPS warp stored, latitude are as critical data, and Current GPS information warp, latitude carry out mathematic interpolation with critical data respectively, if the difference of longitude or latitude is not 0, then GPS information is preserved, otherwise do not preserve, be called deviation compression;
If Current GPS information and the critical data time interval arrive or exceed the maximum deviation time interval, then no matter whether Current GPS information meets the condition of deviation compression, all Current GPS information is stored;
(3), battery data stores: cell voltage, electric current, SOC information data are stored with the storage of GPS information.
6. the method for claim 1, is characterized in that, the data that described car-mounted terminal data collection module stores to real-time data base are all with markers.
7. the method for claim 1, it is characterized in that, described ZigBee master node comprises some ZigBee routing nodes, ZigBee coordinator node and off-line data receive forwarding server, described some ZigBee routing nodes all with the two-way communication of ZigBee coordinator node, described ZigBee coordinator node and off-line data receive forwarding server two-way communication, the data that described ZigBee routing node is uploaded for gathering car-mounted terminal, data upload is received forwarding server to off-line data by described ZigBee coordinator node, described off-line data receives forwarding server and transfers data to car-mounted terminal data collection module, described ZigBee routing node is used for the reception of car-mounted terminal off-line data, described ZigBee coordinator node is used for the route relaying of ZigBee-network, described off-line data receives parsing and the forwarding that forwarding server is used for off-line data.
8. the method for claim 1, it is characterized in that, described car-mounted terminal comprises master control borad, described master control borad respectively with monitor board, GPS module, GPRS module, ZigBee module, memory module, power module, display module, key-press module two-way communication, described master control borad and the two-way communication of Vehicular battery management system, obtain battery operation data.
9. method as claimed in claim 8, is characterized in that,
Described monitor board is used for the monitoring and controlling of car-mounted terminal running status;
Described GPS module is used for collection vehicle current location information, comprises vehicle longitude, latitude, speed or angle;
Vehicle position information and battery information are wirelessly sent to the car-mounted terminal data collection module of center of the centralized monitor by described GPRS module;
Described ZigBee module is used for the transmission of offline cache data, by filling ZigBee-network in electrical changing station vehicle offline cache data is transferred to the car-mounted terminal data collection module of center of the centralized monitor;
Described memory module is used for the buffer memory of off-line data; Described power module supplies for the power supply of car-mounted terminal; Described display module, key-press module are used for the information interaction of user and car-mounted terminal, and user selects the car-mounted terminal information that will check by button.
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