Summary of the invention
Therefore, the invention is intended to solve the problems of the technologies described above, and a kind of guidance method of realizing the electric vehicle charging electrical changing station automobile vehicle guiding system that the electric automobile self-navigation is travelled based on RFID technology and visual identity technology is provided.Native system adopts the navigate mode of image identification and the locator meams of RFID sign, improved the efficiency of positioning precision and vehicle guidance, realized electric automobile in charge position or changed the quick and precisely stop on current potential, for the stable operation of electric vehicle charging electrical changing station provides guarantee.
For achieving the above object, the present invention adopts following technical proposals:
A kind of guidance method of electric vehicle charging electrical changing station automobile vehicle guiding system, described guidance system comprises Surveillance center, one or more car-mounted terminal and one or more land marking; Described Surveillance center comprises monitoring server, and described monitoring server is connected with wireless communication module I, path planning module, electric map module and car plate reading module respectively; Described car-mounted terminal comprises the center-control processing unit, and described center-control processing unit is connected with RFID module, image capture module, video encoding module, vehicle data collection module, vehicle control module, display module, GPS module, wireless communication module II, power module, memory module respectively; Described land marking comprises image identification line and RFID sign; Described Surveillance center and car-mounted terminal communicate by wireless communication module I and wireless communication module II;
It is characterized in that, the guidance method of described guidance system comprises the following steps:
1) information of vehicles reads, processes;
After electric automobile enters and fills electrical changing station, the car plate reading module reads the license board information of the vehicle that enters the station, and is sent to monitoring server, and monitoring server is processed license board information, and license board information is stored in order to file statistics;
2) path planning, cartographic information passback;
Undertaken after path planning that by path planning module the routing information after planning and the correlation map information exchange in electric map module are crossed to wireless communication module I by monitoring server and be sent to the wireless communication module II in car-mounted terminal, by wireless communication module II, reception information is sent to the center-control processing unit;
3) vision guided navigation;
Gather after image guided identification information after being sent to the video encoding module compressed encoding and be uploaded to the center-control processing unit by image capture module, control the operation of vehicle after being processed by the center-control processing unit by vehicle control module, export display module to image format and shown simultaneously; The GPS locating information of GPS module collection vehicle, vehicle data collection module collection vehicle battery information, keep away after barrier information and be sent to the center-control processing unit processes and send to Surveillance center by wireless communication module II and shown by display module simultaneously, provide electric power by power module for car-mounted terminal, memory module is preserved image data and result and related command;
4) electricity is charged, changed in the RFID location;
After arriving the RFID point of impact point, the car-mounted terminal prompting is charged or changes electric impact point position and arrive, and electric automobile starts charging or changes electricity.
The image-pickup method of described image capture module is based on the visual identity technology, adopt the Hough converter technique to extract the guide line image information collected, according to carry binary map data behind limit simulate thereon one relatively preferably straight line as the tag line of vehicle operating, and control and correct the traffic direction of vehicle according to the tag line slope information after extracting by the center-control processing unit.
Below at first in conjunction with the principle of work of concrete structure of the present invention and annexation explanation guidance system:
A kind of electric vehicle charging electrical changing station automobile vehicle guiding system, it comprises Surveillance center, one or more car-mounted terminal and one or more land marking; Described Surveillance center comprises monitoring server, and described monitoring server is connected with wireless communication module I, path planning module, electric map module and car plate reading module respectively; Described car-mounted terminal comprises the center-control processing unit, and described center-control processing unit is connected with RFID module, image capture module, video encoding module, vehicle data collection module, vehicle control module, display module, GPS module, wireless communication module II, power module, memory module respectively; Described land marking comprises image identification line and RFID sign.Described Surveillance center and car-mounted terminal communicate by wireless communication module I and wireless communication module II, and wireless communication module I and wireless communication module II are GPRS or 3G mobile communication module.
In above-mentioned car-mounted terminal, the RFID module provides the RFID navigation information for system, image capture module provides image-guidance information, video encoding module provides image processing function, the vehicle data collection module provides the vehicle operating parameters data, vehicle control module provides vehicle to control function, display module provides Presentation Function, the GPS module provides the GPS locating information, wireless communication module II provide wireless communication function, power module provides power supply, and memory module provides data storage function, and the center-control processing unit is connected between each functional unit.
In above-mentioned Surveillance center, wireless communication module I provide wireless communication function, path planning module provides driving path planning, and electric map module provides electronic map information and car plate reading module to read vehicle license plate information, and monitoring server is connected between each functional unit.
The center-control processing unit of above-mentioned car-mounted terminal, adopt ARM9 as flush bonding processor.It is connected with RFID module, GPS module respectively by the RS232 interface.Above-mentioned image capture module is connected with video encoding module, and the image of collection, after video compression coding, exports the center-control processing unit to and carries out the image processing.Above-mentioned vehicle data collection module adopts the CAN bus to be connected with the center-control processing unit, and the vehicle data collection module also is connected with the battery monitoring device of vehicle, automatically controlled supervising device by the CAN bus.Above-mentioned vehicle control module adopts the CAN bus to be connected with the center-control processing unit, and vehicle control module also is connected with the master control supervising device of vehicle by the CAN bus.
Above-mentioned display module comprises at least one in LCD display, touch-screen, pilot lamp and comprises in case of necessity button, for showing the output data of center-control processing unit, and the operational order input function is provided, and this display module communicates and is connected with the center-control processing unit by IO interface, VGA interface or RS232 mode.
In above-mentioned electric vehicle charging electrical changing station automobile vehicle guiding system, the RFID module gathers the RFID information on roadmarking, and is sent to the center-control processing unit and controls advancing/turn to/falling back/stop of vehicle by vehicle control module after treatment.
In above-mentioned electric vehicle charging electrical changing station automobile vehicle guiding system, image capture module adopts the CCD Digital Video, gather the image mark information on roadmarking, and be sent to after the video encoding module coding and be uploaded to the center-control processing unit after treatment according to the angle of advancing of the differential seat angle data adjustment electric automobile of vehicle and guide line.
In above-mentioned electric vehicle charging electrical changing station automobile vehicle guiding system, the vehicle data collection module connects battery monitoring device and automatically controlled supervising device by the CAN bus, and the operational factor of collection rechargeable battery and the overall operation data of vehicle also are sent to the center-control processing unit.
In above-mentioned electric vehicle charging electrical changing station automobile vehicle guiding system, vehicle control module connects the master control supervising device by the CAN bus, be sent to the center-control processing unit after reading vehicle operating parameters, and control the operation of vehicle according to the instruction of center-control processing unit.
In above-mentioned electric vehicle charging electrical changing station automobile vehicle guiding system, display module is used for the image information, information, the input operation order that the center-control processing unit sends and the path indication information that received Surveillance center sends by wireless communication module II that show that image capture module collects.
In above-mentioned electric vehicle charging electrical changing station automobile vehicle guiding system, the GPS module is for receiving the GPS locating information and being sent to the center-control processing unit.
Above-mentioned image identification line is to be laid on two black and whites on road, parallel continuously guided band in station.
Above-mentioned RFID is designated and is laid on the wireless radio frequency identification mark on road in station, coordinates the image identification line, in the corner of road and the parking spot place emphasis of charge position, lays.
In above-mentioned electric vehicle charging electrical changing station automobile vehicle guiding system, wireless communication module II is for sending by the Information Monitoring after the center-control processing unit processes, driving information and vehicle operating parameters to Surveillance center, and command information, cartographic information, the path indication information of the transmission of reception Surveillance center.
The image-pickup method of the image capture module that car-mounted terminal adopts is based on the visual identity technology, adopt the Hough converter technique to extract the guide line image information collected, according to carry binary map data behind limit simulate thereon one relatively preferably straight line as the tag line of vehicle operating, control and correct the traffic direction of vehicle according to the tag line slope information after extracting by the center-control processing unit, this algorithm is subject to the interference of noise spot less, recognition speed is fast, and the cost of the method is lower, the installation method flexible and convenient, be suitable for being widely used on the road of electrical changing station, to guide electric automobile correctly drive to the charge position of appointment or change current potential.Wherein the recognizer of Hough conversion comes from " the Distinctive Image Features from Scale-Invariant Keypoints " that David G.Lowe delivered on " International Journal of Computer Vision " in 2004.
The RFID module that car-mounted terminal adopts is based on the RFID technology, read the RFID sign in tag line by the RFID reader, wherein comprise charging item information, curve sign information and start-stop acceleration and deceleration flag information, be sent to the operation of controlling vehicle after the center-control processing unit processes according to identification information.The method reliability is high, can be operated in the external environment condition between temperature-40 ℃~85 ℃, and waterproof, protecting against shock, high anti-interference, easy for installation simple, can realize that high-speed data reads, and check point is not subject to destruction yet, be one of innovative point of the present invention.
According to above-mentioned guidance system, the guidance method of the guidance system of electric vehicle charging electrical changing station vehicle comprises the following steps:
(1), information of vehicles reads, processes.
After electric automobile enters and fills electrical changing station, the car plate reading module reads the license board information of the vehicle that enters the station, and is sent to monitoring server, and monitoring server is processed license board information, and license board information is stored in order to file statistics.
(2), path planning, cartographic information passback.
Undertaken after path planning that by path planning module the routing information after planning and the correlation map information exchange in electric map module are crossed to wireless communication module I by monitoring server and be sent to the wireless communication module II in car-mounted terminal, by wireless communication module II, reception information is sent to the center-control processing unit.
(3), vision guided navigation
Gather after image guided identification information after being sent to the video encoding module compressed encoding and be uploaded to the center-control processing unit by image capture module, control the operation of vehicle after being processed by the center-control processing unit by vehicle control module, export display module to image format and shown simultaneously; The GPS locating information of GPS module collection vehicle, vehicle data collection module collection vehicle battery information, keep away after barrier information and be sent to the center-control processing unit processes and send to Surveillance center by wireless communication module II and shown by display module simultaneously, provide electric power by power module for car-mounted terminal, memory module is preserved image data and result and related command.
(4), electricity is charged, changed in the RFID location
After arriving the RFID point of impact point, the car-mounted terminal prompting is charged or changes electric impact point position and arrive, and electric automobile starts charging or changes electricity.
The invention has the beneficial effects as follows:
1, adopt the navigate mode of image identification, guide path setting and change simple and conveniently, cost is low, and easy care has improved the anti-interference of system to image information, has advantages of that signal intensity is high, anti-interference good, conforming property is strong;
2, adopt the locator meams of RFID sign, realized electric automobile in charge position or changed accurate location and the stop on current potential.
3, the mode that adopts RFID navigation and image recognition navigation to combine, improved the efficiency of vehicle guidance, realized electric automobile in charge position or changed the quick and precisely stop on current potential, for the stable operation of electric vehicle charging electrical changing station provides guarantee.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
In Fig. 1, a kind of electric vehicle charging electrical changing station automobile vehicle guiding system, it comprises Surveillance center 1, one or more car-mounted terminal 2 and one or more land marking 3; Described Surveillance center 1 comprises monitoring server 101, and described monitoring server 101 is connected with wireless communication module I 102, path planning module 103, electric map module 104 and car plate reading module 105 respectively; Described car-mounted terminal 2 comprises center-control processing unit 201, and described center-control processing unit is connected with RFID module 207, image capture module 206, video encoding module 211, vehicle data collection module 203, vehicle control module 205, display module 204, GPS module 210, wireless communication module II 202, power module 208, memory module 209 respectively; Described land marking 3 comprises image identification line 301 and RFID sign 302.Described Surveillance center 1 and car-mounted terminal 2 communicate by wireless communication module I102 and wireless communication module II 202, and wireless communication module I 102 and wireless communication module II 202 are GPRS or 3G mobile communication module.
In above-mentioned electric vehicle charging electrical changing station automobile vehicle guiding system, RFID module 207 adopts the RS232 interface to be connected with center-control processing unit 201, image acquisition 206 is connected with video encoding module 211, video encoding module 2211 is connected by the RJ45 interface with center-control processing unit 201, vehicle data collection module 203 adopts the CAN bus to be connected with center-control processing unit 201, vehicle control module 205 adopts the CAN bus to be connected with center-control processing unit 201, display module 204 adopts the IO bus to be connected with center-control processing unit 201, GPS module 210 adopts the RS232 interface to be connected with center-control processing unit 201, wireless communication module II202 adopts serial ports or USB interface to be connected with center-control processing unit 201.
RFID module 207 comprises the RFID reader, by the RFID reader that is arranged on the electric automobile front portion, gathers the electronic labeling information on roadmarking, and is sent to center-control processing unit 201 and controls after treatment advancing/turn to/falling back/stop of vehicle.
Image capture module 206 adopts ccd video camera, collect after the original identification image on roadmarking and be sent to 211 pairs of images of video encoding module and carry out image-path and process, be sent to center-control processing unit 201 after treatment according to the angle of advancing of the differential seat angle data adjustment electric automobile of vehicle and guide line.
Vehicle data collection module 203 connects battery monitoring device by the CAN bus, gathers the service data of rechargeable battery and is sent to center-control processing unit 201.
Vehicle control module 205 connects the master control supervising device by the CAN bus, is sent to center-control processing unit 201 after reading vehicle operating parameters, and controls the operation of vehicle according to the instruction of center-control processing unit 201.
Display module 204 is for the image information that shows image capture module 206 and collect, information, the input operation order that center-control processing unit 201 sends and the path indication information that received Surveillance center sends by wireless communication module II202.
GPS module 210 is for receiving the GPS locating information and being sent to center-control processing unit 201.
Wireless communication module II 202 is for send Information Monitoring, driving information and the vehicle operating parameters after being processed by center-control processing unit 201 to Surveillance center, and reception is by dependent instruction information, the path indication information of wireless communication module I 102 transmissions of Surveillance center.
Image capture module 206 is ccd video camera, be arranged on the positive front of vehicle, be sent to video encoding module 211 after reading ground image identification line by it, the tag line image is encoded after processing and is sent to center-control processing unit 201, adopt edge extracting method to extract the tag line image, adopt the Hough converter technique to extract tag line image point set, according to carry binary map data behind limit simulate thereon one relatively preferably straight line as the tag line of vehicle operating, control and correct the traffic direction of vehicle according to the tag line slope information after extracting by center-control processing unit 201, this algorithm is subject to the interference of noise spot less, recognition speed is fast, and the cost of the method is lower, the installation method flexible and convenient, be suitable for being widely used on the road of electrical changing station, to guide electric automobile correctly to drive to the current potential that changes of appointment.
RFID module 302 is based on the RFID technology, read the RFID sign by the RFID reader, wherein comprise battery charger item directional information, travel route flag information and acceleration, slow down, turn to, stop sign information, being sent to center-control processing unit 201 processes, and contrast with electronic map information, adjust the operation of vehicle according to exist information and the offset information in path; After vehicle sails charge position into or changes current potential, by RFID information and the image identification line information indicating driver who reads ground, stop accurately coordinate.The method high reliability, can be operated in the external environment condition between temperature-40 ℃~85 ℃, and waterproof, protecting against shock, high anti-interference are easy for installation simple, can realize that high-speed data reads, and check point is not subject to destruction yet, is one of innovative point of the present invention.
Image identification line 301 is for being laid on two black and whites on road, parallel continuously guided band in station.
RFID sign 302 is radio electronic label, coordinate image identification line 301 to be laid, turning, parking area and other key position crucial in travel route are installed, wherein recording electric automobile during traveling to the control parameter of this position, comprising travelling speed, direction, turn to, travel route information, the target information that can arrive etc.
Contrast Fig. 2,3 schematic diagram, the workflow of electric vehicle charging electrical changing station automobile vehicle guiding system is as follows:
Be sent to monitoring server 101 read the license board information of the vehicle that enters the station by car plate reading module 105 after, 101 pairs of license board information of monitoring server are processed, and license board information are stored in order to file statistics;
Undertaken after path planning that by path planning module 103 the correlation map information exchange in routing information and electric map module 104 is crossed to wireless communication module I 102 by monitoring server 101 and be sent to the wireless communication module II 202 in car-mounted terminal 2, by wireless communication module II 202, reception information is sent to center-control processing unit 201;
Gather RFID positioning mark information by RFID module 207, be uploaded to center-control processing unit 201 after after the image guided identification information of image capture module 206 collection, being sent to video encoding module 211 codings, control the operation of vehicle after being processed by center-control processing unit 201 by vehicle control module 205, export display module 204 to image format is shown simultaneously, the GPS locating information of GPS module 210 collection vehicle, being sent to center-control processing unit 201 after vehicle data collection module 203 collection vehicle battery informations processes and sends to Surveillance center by wireless communication module II 209 and shown by display module 204 simultaneously, provide electric power by power module 208 for car-mounted terminal, memory module 209 is preserved image data and result and related command.
After arriving the RFID point of impact point, the car-mounted terminal prompting arrives charging or changes electric impact point position, and electric automobile starts charging or changes electricity.
Although above the present invention is had been described in detail, the present invention is not limited to this, and those skilled in the art of the present technique can carry out the modification on various forms according to principle of work of the present invention.Therefore, all modifications of doing according to the principle of the invention, all should be understood to fall into protection scope of the present invention.