Electric automobile fills electrical changing station vehicle guidance end device
Technical field
The present invention relates to a kind of vehicle guidance end device, be specifically related to a kind of electric automobile and fill electrical changing station vehicle guidance end device based on RFID technology and visual identity technology.
Background technology
As a kind of emerging energy delivery vehicle that can replace the traditional power automobile; The development of electric automobile more and more receives the attention of government and enterprise; Human and material resources and financial resources in that drop in this field are also increasing, lead automobile industry to move towards new developing direction.
In the practical application of electric automobile; For convenient the use mainly takes to change the mode that electricity is the master; Electric automobile enters into to fill need drive to voluntarily to change on the current potential behind the electrical changing station and carries out more changing jobs of electrokinetic cell by mechanical arm, how to realize vehicle self-navigation in filling electrical changing station, vehicle is rested in exactly change and become problem anxious to be solved on the electric position.In the art; Application number is that 201010528873.1 patent of invention discloses the predetermined and navigational system of a kind of charging electric vehicle; Its realized vehicle from road to the GPS navigation that fills electrical changing station; Change the accurately guiding of parking spot on the current potential but lack the guiding of filling travel route in the electrical changing station and vehicle filling, can't guarantee driving safety, efficient and the order of vehicle in the station, can't the accurate arrival of staff vehicles fill and change electric position.Application number is that 200710156863.8 patent of invention has been announced a kind of automatic guidance system and method thereof based on RFID tag and vision; It adopts industrial control computer to be used for Flame Image Process and path planning; Its device structure is complicated; Equipment volume is excessive, is inappropriate for being applied to electric automobile and filling in the guidance system of electrical changing station, can't satisfy the requirement of the industry to guidance system.
In practical application; Electrical changing station control center also need monitor and unified management electric vehicle in standing in real time; Only depend on the staff to supervise or camera head monitor can't be accomplished in time, comprehensively management, and need the manpower and the material resources of labor, not only increased operation cost; Also can reduce work efficiency, not meet the development plan of whole industry.
At present, mainly there are following problem in traditional electric automobile guidance system and end device thereof:
1) adopts the mode of electronic direction board not only to increase production cost, also can't for going of each vehicle indication be provided individually, can't make vehicle correctly drive to filling of appointment and change current potential.
2) the accurate parking problem of automobile on the parking stall of can't realizing charging requires vehicle when generally changing electricity and the angle of changing between the electromechanical hand is no more than 15 °, and the stand of vehicle is had strict demand.
3) stand in the employed camera head monitor method real-time status that can't at length add up each vehicle, the real-time positioning monitoring problem of vehicle in can't realizing standing.
Summary of the invention
Therefore, the invention is intended to solve the problems of the technologies described above, realize that based on RFID technology and visual identity technology the electric automobile that the electric automobile self-navigation is gone fills electrical changing station vehicle guidance end device and provide a kind of.Native system adopts the navigate mode of image identification and the locator meams of RFID sign; Improved the efficient of bearing accuracy and vehicle guidance; Realized electric automobile in charge position or change the stop quick and precisely on the current potential, the stable operation of filling electrical changing station for electric automobile provides guarantee.
For realizing above-mentioned purpose, the present invention adopts following technical proposals:
A kind of electric automobile fills electrical changing station vehicle guidance end device and comprises central controlled processing unit, and said central controlled processing unit is connected with RFID module, image capture module, video encoding module, vehicle data acquisition module, vehicle control module, display module, GPS module, wireless communication module, power module, memory module respectively; The image capture module of said end device is based on the visual identity technology; Adopt the Hough converter technique to extract the guide line image information that is collected; And according to carry binary map data behind the limit simulate above that one relatively preferably straight line as the tag line of vehicle operating, and by central controlled processing unit according to the tag line slope information control after extracting with correct the traffic direction of vehicle.
Said central controlled processing unit adopts ARM9 as flush bonding processor, and it is connected with RFID module, GPS module respectively through the RS232 interface.
Said image capture module is connected with video encoding module, and the image of collection exports central controlled processing unit to and carries out Flame Image Process through behind the video compression coding.
Said vehicle data acquisition module adopts the CAN bus to be connected with central controlled processing unit, and the vehicle data acquisition module also is connected with the battery monitoring device of vehicle, automatically controlled supervising device through the CAN bus.
Said vehicle control module adopts the CAN bus to be connected with central controlled processing unit, and vehicle control module is connected with the master control supervising device of vehicle through the CAN bus.
Said wireless communication module adopts serial ports or USB interface to be connected with central controlled processing unit, and said wireless communication module is GPRS or 3G mobile communication module.
The principle of work that at first combines concrete structure of the present invention and annexation explanation guidance system below:
A kind of electric automobile fills electrical changing station vehicle guidance end device and comprises central controlled processing unit, and said central controlled processing unit is connected with RFID module, image capture module, video encoding module, vehicle data acquisition module, vehicle control module, display module, GPS module, wireless communication module, power module, memory module respectively; Said land marking comprises image identification line and RFID sign.
In the above-mentioned car-mounted terminal, the RFID module of RFID navigation information is provided, the image capture module of image-guidance information is provided; The video encoding module of image processing function is provided, the vehicle data acquisition module of vehicle operating parameters data is provided, the vehicle control module of vehicle control function is provided; The display module of Presentation Function is provided; The GPS module of GPS locating information is provided, the wireless communication module of wireless communication function is provided, the power module of power supply is provided; The memory module of data storage function is provided, and central controlled processing unit is connected between each functional unit.
Above-mentioned central controlled processing unit adopts ARM9 as flush bonding processor.It is connected with RFID module, GPS module respectively through the RS232 interface.Above-mentioned image capture module is connected with video encoding module, and the image of collection exports central controlled processing unit to and carries out Flame Image Process through behind the video compression coding.Above-mentioned vehicle data acquisition module adopts the CAN bus to be connected with central controlled processing unit, and the vehicle data acquisition module also is connected with the battery monitoring device of vehicle, automatically controlled supervising device through the CAN bus.Above-mentioned vehicle control module adopts the CAN bus to be connected with central controlled processing unit, is connected with the master control supervising device of vehicle through the CAN bus.
Above-mentioned display module comprises at least a and button in LCD display, touch-screen, the pilot lamp; Be used to show the output data of central controlled processing unit; And the operational order input function is provided, and this display module communicates with central controlled processing unit through IO interface, VGA interface or RS232 mode and is connected.
Above-mentioned electric automobile fills the electrical changing station automobile vehicle guiding system, and the RFID module is gathered the RFID information on the roadmarking, and is sent to central controlled processing unit advancing/turning to/falling back/stop through vehicle control module control vehicle after treatment.
Above-mentioned electric automobile fills the electrical changing station automobile vehicle guiding system; Image capture module adopts the CCD DV; Gather the image mark information on the roadmarking, and be uploaded to central controlled processing unit is adjusted electric automobile after treatment according to the differential seat angle data of vehicle and guide line the angle of advancing after being sent to the video encoding module coding.
Above-mentioned electric automobile fills the electrical changing station automobile vehicle guiding system, and the vehicle data acquisition module connects battery monitoring device and automatically controlled supervising device through the CAN bus, and the operational factor of collection rechargeable battery and the overall operation data of vehicle also are sent to central controlled processing unit.
Above-mentioned electric automobile fills the electrical changing station automobile vehicle guiding system, and vehicle control module connects the master control supervising device through the CAN bus, is sent to central controlled processing unit after reading vehicle operating parameters, and according to the operation of the instruction control vehicle of central controlled processing unit.
Above-mentioned electric automobile fills the electrical changing station automobile vehicle guiding system, and display module is used for image information, information, the input operation order that central controlled processing unit sends and the path indication information that is sent by the received Surveillance center of wireless communication module that the display image acquisition module collects.
Above-mentioned electric automobile fills the electrical changing station automobile vehicle guiding system, and the GPS module is used to receive the GPS locating information and is sent to central controlled processing unit.
Wireless communication module is used for sending by Information Monitoring, driving information and vehicle operating parameters after the central controlled processing unit processing to Surveillance center, and receives command information, cartographic information, the path indication information that Surveillance center sends.
The image capture module that car-mounted terminal adopted is based on the visual identity technology; Adopt the Hough converter technique to extract the guide line image information that is collected; According to carry binary map data behind the limit simulate above that one relatively preferably straight line as the tag line of vehicle operating; According to the control of the tag line slope information after extracting with correct the traffic direction of vehicle, this algorithm receives that the interference of noise spot is less, recognition speed is fast, and the cost of this method is lower, the installation method flexible and convenient by central controlled processing unit; Be suitable for being widely used on the road of electrical changing station, correctly drive to the charge position of appointment or change current potential to guide electric automobile.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 adopted is based on the RFID technology; Read the RFID sign in the tag line through the RFID reader; Wherein comprise charging item information, curve sign information and start-stop acceleration and deceleration flag information, be sent to central controlled processing unit and handle the operation of back according to identification information control vehicle.This method high reliability can be operated in the external environment condition between the 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.
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 signal intensity height, anti-interference is good, conforming property is strong advantage;
2, adopt the locator meams of RFID sign, realized that electric automobile is in charge position or change accurate location and the stop on the current potential.
3, the mode that adopts RFID navigation and image recognition navigation to combine has improved the efficient of vehicle guidance, has realized electric automobile in charge position or change the stop quick and precisely on the current potential, and the stable operation of filling electrical changing station for electric automobile provides guarantee.
Description of drawings
Fig. 1 fills the structured flowchart of electrical changing station vehicle guidance end device for electric automobile of the present invention;
Fig. 2 fills the data flow synoptic diagram of electrical changing station vehicle guidance end device for electric automobile of the present invention;
Among Fig. 1: 2. car-mounted terminal: 201. central controlled processing units, 202. wireless communication modules, 203. vehicle data acquisition modules; 204. display module, 205. vehicle control module, 206. image capture modules; 207.RFID module, 208. power modules, 209. memory modules; 210.GPS module, 211. video encoding module;
Embodiment
Below in conjunction with accompanying drawing the present invention is further specified.
Among Fig. 1; A kind of electric automobile fills electrical changing station vehicle guidance car-mounted terminal 2 and comprises central controlled processing unit 201, and said central controlled processing unit 201 is connected with RFID module 207, image capture module 206, video encoding module 211, vehicle data acquisition module 203, vehicle control module 205, display module 204, GPS module 210, wireless communication module 202, power module 208, memory module 209 respectively; Said car-mounted terminal 2 carries out communicating by letter with Surveillance center through wireless communication module 202, and said wireless communication module 202 is GPRS or 3G mobile communication module.
Fill in the electrical changing station vehicle guidance end device at above-mentioned electric automobile; RFID module 207 adopts the RS232 interface to be connected with central controlled processing unit 201; IMAQ 206 is connected with video encoding module 211; Video encoding module 2211 is connected through the RJ45 interface with central controlled processing unit 201; Vehicle data acquisition module 203 adopts the CAN bus to be connected with central controlled processing unit 201, and vehicle control module 205 adopts the CAN bus to be connected with central controlled processing unit 201, and display module 204 adopts the IO bus to be connected with central controlled processing unit 201; GPS module 210 adopts the RS232 interface to be connected with central controlled processing unit 201, and wireless communication module 202 adopts serial ports or USB interface to be connected with central controlled processing unit 201.
RFID module 207 comprises the RFID reader, gathers the electronic labeling information on the roadmarking through being installed in the anterior RFID reader of electric automobile, and is sent to central controlled processing unit 201 and controls advancing/turn to/falling back/stop of vehicle after treatment.
Image capture module 206 adopts ccd video camera; Collect and be sent to 211 pairs of images of video encoding module behind the original identification image on the roadmarking and carry out image-path and handle, be sent to central controlled processing unit 201 is adjusted electric automobile after treatment according to the differential seat angle data of vehicle and guide line the angle of advancing.
Vehicle data acquisition module 203 connects battery monitoring device through the CAN bus, gathers the service data of rechargeable battery and is sent to central controlled processing unit 201.
Vehicle control module 205 connects the master control supervising device through the CAN bus, is sent to central controlled processing unit 201 after reading vehicle operating parameters, and according to the operation of the instruction control vehicle of central controlled processing unit 201.
Display module 204 is used for image information, information, the input operation order that central controlled processing unit 201 sends and the path indication information that is sent by wireless communication module 202 received Surveillance center that display image acquisition module 206 collects.
GPS module 210 is used to receive the GPS locating information and is sent to central controlled processing unit 201.
Wireless communication module 202 is used for sending by Information Monitoring, driving information and vehicle operating parameters after central controlled processing unit 201 processing to Surveillance center, and receives dependent instruction information, the path indication information that is sent by Surveillance center.
Image capture module 206 is a ccd video camera; Be installed in the positive front of vehicle; Be sent to video encoding module 211 after reading ground image identification line through it; The tag line image is carried out being sent to central controlled processing unit 201 after the encoding process; 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 the limit simulate above that one relatively preferably straight line as the tag line of vehicle operating, by central controlled processing unit 201 according to the tag line slope information control after extracting with correct the traffic direction of vehicle; This algorithm receives that the interference of noise spot is less, recognition speed is fast; And the cost of this method is lower, the installation method flexible and convenient, is suitable for being widely used on the road of electrical changing station, correctly drives to the current potential that changes of appointment to guide electric automobile.
RFID module 207 is based on the RFID technology; Read the RFID sign in the tag line through the RFID reader; Wherein comprise battery charger item directional information, travel route flag information and acceleration, slow down, turn to, stop sign information; Be sent to central controlled processing unit 201 and handle, and contrast, according to the operation that has information and offset information adjustment vehicle in path with electronic map information; After vehicle sails charge position into or changes current potential, stop coordinate accurately through RFID information and the image identification line information indicating driver who reads ground.This method high reliability can be operated in the external environment condition between the 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.
The image identification line is to be laid on two black and whites on the road, parallel continuously guided band in the station.RFID is designated radio electronic label; Cooperate the image identification line to lay; Turning, parking area and other key position crucial in travel route are installed; Wherein writing down electric automobile during traveling to this control of position parameter, comprising travelling speed, direction, turn to, travel route information, the target information that can arrive etc.
The workflow that the synoptic diagram of map 2, electric automobile fill electrical changing station vehicle guidance end device is following:
Gather RFID guiding identification information, after being sent to video encoding module 211 codings behind the image capture module 206 images acquired guiding identification information, be uploaded to central controlled processing unit 201 by RFID module 207; Handle the operation of back by central controlled processing unit 201 through vehicle control module 205 control vehicles; Simultaneously exporting display module 204 to image format shows; Be sent to behind the GPS locating information of GPS module 210 collection vehicle, the vehicle data acquisition module 203 collection vehicle battery informations that central controlled processing unit 201 is handled after wireless communication module 209 sends to Surveillance center shows through display module 204 simultaneously; For car-mounted terminal provides electric power, memory module 209 is preserved image data and result and related command by power module 208.After arriving the RFID point of impact point, the car-mounted terminal prompting arrives charging or changes electric impact point position, and electric automobile begins charging or changes.
Although preceding text specify the present invention, the present invention is not limited to this, and those skilled in the art of the present technique can carry out the modification on the various forms according to principle of work of the present invention.Therefore, all modifications of doing according to the principle of the invention all are to be understood that to falling into protection scope of the present invention.