CN106506078A - A kind of visible light communication car light intercommunication method with License Plate - Google Patents
A kind of visible light communication car light intercommunication method with License Plate Download PDFInfo
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- CN106506078A CN106506078A CN201610953337.3A CN201610953337A CN106506078A CN 106506078 A CN106506078 A CN 106506078A CN 201610953337 A CN201610953337 A CN 201610953337A CN 106506078 A CN106506078 A CN 106506078A
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- 238000004891 communication Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000003384 imaging method Methods 0.000 claims abstract description 20
- 108091008695 photoreceptors Proteins 0.000 claims description 34
- 210000001624 hip Anatomy 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 230000000977 initiatory effect Effects 0.000 claims description 5
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000003993 interaction Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 10
- 238000003491 array Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
- G06V20/62—Text, e.g. of license plates, overlay texts or captions on TV images
Abstract
The invention discloses a kind of visible light communication car light intercommunication method with License Plate.A kind of visible light communication car light talkback unit is set, including preposition transceiver, rearmounted transceiver and user interface；When two cars carry out intercommunication, the transceiver of this car is communicated with the transceiver of opponent vehicle；The visible light communication signal of talkback unit is sent as a data frame；When device communicates, the position for determining intercommunication car plate is searched for by device, and thus positions the position of its visible light communication car light.The inventive method, using visible light communication technology and image acquisition, technology of identification, achieve identification and the positioning of car plate, and combine License Plate, the position of quick positioning vehicle car light, using the combination of imaging technique and non-imaged technology, so as to improve stability and the accuracy of visible light communication so that carry out the speech talkback between vehicle with visible light communication technology under complicated traffic environment and be possibly realized.
Description
Technical field
The invention belongs to technical field of photo communication, particularly a kind of visible light communication car light intercommunication side with License Plate
Method.
Background technology
The driver of operating motor vehicles on road, may require that sometimes and other vehicles that goes together, is travelled with front and back in the same direction
Or the vehicle of Facing Movement carries out some exchanges, for example：Tractor needs to keep speed consistent as far as possible with the vehicle of towing, while
Brake, parking；The special vehicles such as police car, ambulance need to point out front vehicles slow down, avoid, keeping to the side to stop in the task of execution
Car etc.；For colleague vehicle, we can be considered as vehicle-mounted intercommunication mode and exchange, special vehicle then by loudspeaker, warning lamp,
Siren etc. is reminded；
Lamp signal is driver carries out a kind of simple method for exchanging in driving with other vehicles, using car light bright, go out, flash
Etc. mode, other driver's steerings, vehicle trouble, Emergency avoidance, adjustment long-and-short distant light etc. is pointed out, but the above mode can be taken
The quantity of information of band is little, not intuitively；Additionally, nowadays with the popularization of motor vehicles, increasing people has private car, but
It is not that everyone both knows about the lamp signal for how distinguishing these flickers；
Visible light communication can be described as a kind of high speed lamp signal, and the method is communicated using the high speed amplitude modulated beams of visible light wave range
A kind of method, can carry out data, voice etc. communication；High speed lamp signal is realized using visible light communication technology, then can be fine
Above-mentioned these problems of solution；But the vehicle due to travelling on road is more, light is mixed and disorderly, if it is desired to realizing on road
Visible light communication carries out intercommunication between designated vehicle, how to select, and is a problem to be solved again；
Car plate is the unique identity of motor vehicles, the specification of existing automotive number plate be all fixed, compact car
Car plate 440mm × 140mm, the front car plate size of large car are equivalently-sized with small-sized car plate, and rear board is 440mm × 220mm；Car plate
It is required that visibility point is installed before and after vehicle；Through observing, the headlamp of motor vehicles and rearmounted brake lamp are generally in front and back's car
120 degree of board or so, apart from about 1 meter of the sector region in car plate edge；And, return to see a car light for lighting by photographic head collection
Be a circular hot spot, the hot spot the numerical value through AD conversion, a saltus step is had relative to outer peripheral areas；
According to above-mentioned Railway Project and several technical methods, the present invention proposes a kind of visible ray with License Plate and leads to
Letter car light intercommunication method.
Content of the invention
It is an object of the invention to provide a kind of visible light communication car light intercommunication method with License Plate.
Concretely comprise the following steps：
(1) a kind of visible light communication car light talkback unit is set, including：Preposition transceiver, rearmounted transceiver and user interface；Before
Transceiver is put, including：Image acquisition device, image processor, photoreceptor array, decision device, preposition car light, pre-driver；
Rearmounted transceiver, including：Image acquisition device, image processor, photoreceptor array, decision device, rearmounted car light, rearmounted drive
Dynamic；User interface, including：Voice collector, speech processor, keyboard, speech player, transceiver controller, display, touch
Screen.
User interface respectively with preposition transceiver, rearmounted transmitting-receiving mechatronics；In preposition transceiver, pre-driver and front
Put car light electrical connection, image acquisition device electrically connect with image processor, photoreceptor array respectively, photoreceptor array with
Decision device is electrically connected；In rearmounted transceiver, rearmounted driving and rearmounted car light electrically connect, image acquisition device respectively with image procossing
Device, photoreceptor array electrical connection, photoreceptor array and decision device electrical connection；In user interface, transceiver controller
Electrically connect with speech processor, keyboard, speech player, display, touch screen respectively, speech processor is electric with voice collector
Connection.
Image acquisition device, obtains obtaining image information for gathering real-time imaging, and exports to image processor；Preposition receipts
The machine of sending out is identical with the image acquisition device purposes of rearmounted transceiver.
Image processor, for the image information exported according to image acquisition device, identifies the position of the car plate in image,
The position of light in license plate number and image；Preposition transceiver is identical with the image processor purposes of rearmounted transceiver.
Photoreceptor array, each photelectric receiver in array are all corresponding with image acquisition device pixel,
For sensing the visible light communication signal that the pixel positonlight sends, and be converted to analog electrical signal output；Preposition transmitting-receiving
Machine is identical with the photoreceptor array purposes of rearmounted transceiver.
Decision device, for the instruction according to transceiver controller, selects corresponding photelectric receiver in photoreceptor array
Analog electrical signal output, and be converted into corresponding digital signal and export；Preposition transceiver and the decision device of rearmounted transceiver
Purposes is identical.
Preposition car light, for sending visible light signal, headlamp of the preposition car light using automobile.
Pre-driver, for driving preposition car light to send visible light signal.
Rearmounted car light, for sending visible light communication signal, clearance lamps, brake lamp of the rearmounted car light using automobile rear.
Rearmounted driving, for driving rearmounted car light to send visible light signal；Pre-driver and rearmounted driving are all to drive electricity
Road.
Preposition car light and rearmounted car light are all visible light communication car lights.
Voice collector, for obtaining phonetic control command, the speech talkback of user, and it is defeated to be converted to analog electrical signal
Go out.
Analog electrical signal, for processing the output of voice collector, is converted into digital signal and is exported by speech processor.
Keyboard, for being input into intercommunication license plate number and control instruction by key mode to device.
Touch screen, for by clicking mode on the touchscreen, selecting license plate number, the control instruction shown on display,
And car plate is selected in the real-time imaging of the image acquisition device for showing over the display with visible light communication on the vehicle of the car plate
The position of car light.
Speech player, the voice of information of voice prompt and intercommunication for playing device.
Display, needs the graph text information for showing for display device intercommunication；Graph text information, including：License plate number, man-machine friendship
Mutual information, the real-time imaging of image acquisition device.
Transceiver controller, for realizing：1st, the output of speech processor is processed, identifies the intercommunication of speech form
Information, license board information, command information；2nd, the signal output of keyboard, and the signal according to output is obtained, the instruction letter of output is determined
Breath, license board information；3rd, the license plate number of reception image processor output, the positional information of light in the position of car plate and image,
And determine the vehicle license plate number for needing to set up connection, and the position letter of the visible light communication car light of the position of the car plate and the car
Breath；4th, according to the light position information of visible light communication car light, the photelectric receiver that decision device selects corresponding pixel points is controlled, and
Receive the digital signal output of decision device；5th, the digital signal output of decision device is converted into corresponding data, instruction or language
Message number；6th, control display shows corresponding graph text information；7th, control voice player plays information of voice prompt and intercommunication
Voice；8th, car plate data base is preserved；9th, the signal output of touch screen, and the signal according to output is received, is converted into corresponding
Command information, license board information；10th, according to the car plate and car in the real-time imaging shown on the display that touch screen is clicked
Lamp, indicates that image processor preferentially recognizes that this chooses the license plate number of car plate, and the vehicle is used for the visible light communication car of communication
Lamp；11st, the Frame of visible light communication, according to speech talkback information, control information, is generated, and according to Frame and intercommunication car
Position, send signal to pre-driver or rearmounted driving, then drive visible light communication car light to send by drive circuit can
See optical signal.
When in front and back's two cars carry out intercommunication, front truck is carried out with the preposition transceiver of rear car using the rearmounted transceiver of this car
Communication；Rear car is communicated with the rearmounted transceiver of front truck using the preposition transceiver of this car；When to carrying out intercommunication to two cars,
Two cars are communicated with the rearmounted transceiver of front truck using the preposition transceiver of this car.
The signal of communication of visible light communication car light talkback unit is sent as a data frame, and Frame includes：Synchronous code,
Target license plate, source car plate, data type, data length, data, check information, totally 7 fields.
Synchronous code, for keeping the data transmit-receive clock synchronization of two talkback units of intercommunication both sides, and represents one
The beginning of Frame.
Target license plate, needs the opponent vehicle license plate number for carrying out intercommunication for representing.
Source car plate, for representing the one's own side's vehicle license plate number for carrying out intercommunication；For police car, ambulance, the field can be
The license plate number information of vehicle itself, or special numeral combination.
Data type, for representing that the type of notebook data frame, the type of Frame include：Intercommunication request, radio voice, right
Say that request-reply, intercommunication request-reply confirm；Intercommunication request data frame is sent by intercommunication originating end, is responded to intercommunication for representing
End sends the request that intercommunication is set up；Intercommunication request-reply Frame is sent by intercommunication responder, for representing to intercommunication originating end
Send the request-reply that intercommunication is set up；Intercommunication request-reply confirms that Frame is sent by intercommunication originating end, and it is right to receive for expression
Request-reply Frame is said, confirms to set up connection；Radio voice Frame, for carrying the voice messaging that will send intercommunication.
Data length, for representing the length of data field in a Frame.
Data, for placing the voice messaging of intercommunication.
Check information, whether wrong for inspection data frame, for the mistake occurred in transmitting procedure is corrected.
Car plate data base, the address list for having license plate number, the blacklist for having license plate number.
Intercommunication both sides select the mode of the vehicle license plate number for setting up connection to have 4 kinds：1st, phonetic entry；2nd, input through keyboard；3、
Touch-screen menus are input into；4th, screen image input is touched.
License plate number is given an oral account in phonetic entry, user, the voice messaging for obtaining license plate number by voice collector, then by speech processes
After device process, output identifies license plate number to transceiver controller by transceiver controller.
Input through keyboard, user are input into license plate number by the button of keyboard to device.
Touch-screen menus are input into, and user is corresponding to the phase of touch screen according to the picture and text information shown on display
The license plate number for selecting intercommunication car plate is clicked on to position.
Touch screen image input, user according on display show the real-time imaging got by image acquisition device in,
In car plate, car light that the relative position for corresponding to touch screen clicks the vehicle that sees in image, then by transceiver controller control figure
As processor captures the car plate in image, and identify the position of license plate number and car light.
(2) the visible light communication car light talkback unit for arranging two sets of steps (1) is labeled as I terminals and II terminals, I terminals
Be separately mounted on two motor vehicles for needing intercommunication with II terminals, i.e., on vehicle of the I terminals installed in license plate number for cp1, II ends
On vehicle of the end installed in license plate number for cp2；The control process of intercommunication is as follows：
Firstly, it is necessary to be between the vehicle of the vehicle of cp1 and the license plate number of II terminals for cp2 in the license plate number for being mounted with I terminals
Connection is set up, intercommunication is initiated by I terminals, is concretely comprised the following steps：
T1, license plate number cp2 of the vehicle connected by using button, voice, touch screen, input needs foundation.
T2, device identify license plate number cp2, and cp2 is packed into Frame.
T3, the preposition car light using I terminals, rearmounted car light, the number that will be asked to set up connection using visible light communication signal
Send according to frame.
T4, the preposition transceiver for passing through I terminals, rearmounted transceiver, search the position of the car plate for obtaining license plate number cp2.
T5, the position according to the car plate of license plate number cp2, position the position of the visible light communication car light of II terminals.
T6, navigate to the position of visible light communication car light of II terminals after, determine the visible of the photelectric receiver that should read
Optic communication signal, waits the intercommunication request-reply Frame from II terminals, and carries out time-out count, enters following sub-step.
T6.1 receive the intercommunication request-reply Frame from II terminals when before time-out count is completed, it is determined that logical
After letter both sides' information of vehicles is errorless, lock opponent vehicle, send intercommunication request-reply to II terminals and confirm Frame, and start right
Say；Before completing in time-out count, the intercommunication request data frame from II terminals is received, then intercommunication request is sent to II terminals should
The Frame that answers, waits the intercommunication request-reply sent from II terminals to confirm Frame.
If not receiving the intercommunication request-reply Frame of II terminals, intercommunication request data after T6.2 time-out counts are complete yet
Frame, intercommunication request-reply confirm Frame, then return to step T3, and carry out connection failure counting；If connection failure is counted
Reach setting value and still do not set up connection, just stop connection, and user's connection failure is informed by voice, display.
(3) in the II terminals of intercommunication, except initiating to talk with as I terminals, it is also in searching for recipient
Formula, searches for reception mode, and step is：
R1, image information is obtained by image acquisition device collection real-time imaging, then identified by image processor all in image
Car plate and the license plate number of each car plate；Search car plate data base, for blacklist in license plate number, just directly shielding；If
It is the license plate number in unknown license plate number and address list, then enters next step.
R2, the position according to the car plate for searching license plate number, position the position of its visible light communication car light.
R3, by visible light communication car light position, determine the visible light signal that the photelectric receiver that should read is received；By
This search is that the visible light communication car light of which car plate has initiation intercommunication request.
R4, it is license plate number or police car, ambulance in address list when initiate intercommunication request, then sends out to the car
Go out the Frame of intercommunication request-reply, and wait the intercommunication request-reply sent from the car to confirm Frame, it is right that preparation starts
Say.
R5, it is unknown license plate number that car plate data base does not have when initiate intercommunication request, then is inquired by voice, display
Whether user agrees to set up connection；If agreed to, to the Frame that the car sends intercommunication request-reply, and wait from the car
The intercommunication request-reply of transmission confirms Frame, prepares to start intercommunication；Conversely, then abandoning Frame, ignore intercommunication.
(4) in intercommunication both sides, Frame will be verified, for the Frame that talkback unit is received, carry out as
Lower checking：
C1, confirm that by target license plate field whether one's own side be the destinations traffic vehicle that should be received：If it is, just subsequently being grasped
Make；Otherwise with regard to lost data frames.
C2, the source vehicle that comes for confirming to send Frame by source car plate field, and according to if the car plate in address list, just
Intercommunication request-reply Frame is directly returned；If the car plate in blacklist, Frame is just abandoned；If unknown car
Board, just first passes through voice broadcast, display and shows, then selects to be confirmed whether to receive by the user of target vehicle, if agreeing to connect
Receiving, Frame is abandoned if disagreeing and receiving；If it is police car, rescue to carry out source vehicle
Car, is just directly received Frame, and is shown by voice broadcast, display.
(5) after searching for and determining the position of a car plate, the position of its visible light communication car light, the process of positioning are positioned
As follows：
D1, the position for determining a car plate, and the car plate in the image that image acquisition device is obtained, the picture that the long side of car plate takes
Vegetarian refreshments number x, pixel number y that car plate broadside takes.
D2, construction rectangular coordinate system：Two diagonal intersection points with rectangle car plate as rectangular coordinate system origin, to pass through
Origin and parallel to long side straight line be transverse axis, right side be transverse axis positive direction；Be the longitudinal axis perpendicular to long side, top be the longitudinal axis just
Direction, a pixel are coordinate system long measure.
D3, one isosceles trapezoid of construction：The extended line of two waists of isosceles trapezoid through origin, two waists respectively with right angle
The positive axis of coordinate system transverse axis is spent in -60 degree and+60, with the extended line of the right edge of car plate as upper bottom, with the right side of car plate
2 times of side car plate length y is height；In the isosceles trapezoid region, the car light on the right side of the car plate of the car is searched in scanning from left to right.
The pixel that D4, a brightness value on the right side of searching from left to right occur saltus step is just predicted as light place
Position, controls arbiter by transceiver controller and selects the corresponding photelectric receiver in photoreceptor array of the pixel
Output；Parsing Frame is attempted, if it is possible to parse Frame according to the output of decision device by transceiver controller again, just right
Frame is verified：If the source car plate field in Frame is consistent with the car plate, it is determined that the light be the car plate can
See that optic communication car light sends, and receive the visible light communication signal；If Frame cannot be parsed, previous step is will be returned to,
Continue to search for the light in region.
D5, when determine right side light after, search again for the car light on the left of car plate, equally first construct an isosceles trapezoid：
The extended line of two waists of isosceles trapezoid through origin, two waists respectively with the negative semiaxis of rectangular coordinate system transverse axis in -60 degree and+
60 degree, with the left side extended line of car plate as upper bottom, with apart from 2 times of car plate length y of car plate left side as height；In the isosceles trapezoid
In region, the car light on the left of the car plate of the car is searched in scanning from right to left.
The pixel that D6, a brightness value on the left of searching from right to left occur saltus step is just predicted as light place
Position, controls arbiter by transceiver controller and selects the corresponding photelectric receiver in photoreceptor array of the pixel
Output；Parsing Frame is attempted, if it is possible to parse Frame according to the output of decision device by transceiver controller again, just right
Frame is verified, if the source car plate field in Frame is consistent with the car plate, it is determined that the light be the car plate can
See that optic communication car light sends, and receive the visible light communication signal；If Frame cannot be parsed, previous step is will be returned to,
Continue to search for the light in region.
D7, the two positions are locked after position all determines in image acquisition device, then when bilateral light；And in the next one
At the image acquisition moment of image acquisition device, search for the two positions and its adjacent pixel, brightness value whether with upper one
The collection moment is close to, and to determine light position, and parses Frame, logarithm by transceiver controller according to the output of decision device
Verified according to frame, if the source car plate field in Frame is consistent with the car plate, it is determined that the light is the visible of the car plate
Optic communication car light sends, and receives the visible light communication signal；If due to blocking or other reasonses, causing this step cannot
Execute, then jump to the 1st step, reposition car light.
The visible light communication car light intercommunication method with License Plate of the present invention, is adopted using visible light communication technology and image
Collection, technology of identification, it is achieved that the identification of car plate and positioning, and License Plate is combined, the position of quick positioning vehicle car light adopts
Imaging technique and the combination of non-imaged technology, so that improve stability and the accuracy of visible light communication so that in complicated friendship
The speech talkback between vehicle is carried out with visible light communication technology under logical environment to be possibly realized.
Description of the drawings
Fig. 1 is the structure chart of the visible light communication car light talkback unit used in the embodiment of the present invention.
Labelling in figure：1- user interfaces；The preposition transceivers of 2-；The rearmounted transceivers of 3-；10- transceiver controllers；11- voices are adopted
Storage；12- speech processors；13- keyboards；14- speech players；15- display；16- touch screens；20- image acquisition devices；
21- image processors；22- photoreceptor arrays；23- decision devices；The preposition car lights of 24-；25- pre-drivers；At 30- images
Reason device；31- image acquisition devices；32- decision devices；33- photoreceptor arrays；The rearmounted drivings of 34-；The rearmounted car lights of 35-.
Specific embodiment
Embodiment：
(1) a kind of visible light communication car light talkback unit is set, including：Preposition transceiver 2, rearmounted transceiver 3, user interface 1；
Preposition transceiver 2, including：Image acquisition device 20, image processor 21, photoreceptor array 22, decision device 23, preposition car light
24th, pre-driver 25；Rearmounted transceiver 3, including：Image acquisition device 31, image processor 30, photoreceptor array 33, sentence
Certainly device 32, rearmounted car light 35, rearmounted driving 34；User interface 1, including：Voice collector 11, speech processor 12, keyboard 13,
Speech player 14, transceiver controller 10, display 15, touch screen 16.
User interface 1 is electrically connected with preposition transceiver 2, rearmounted transceiver 3 respectively；In preposition transceiver 2, pre-driver
25 and preposition car light 24 electrically connect, image acquisition device 20 is electrically connected with image processor 21, photoreceptor array 22 respectively, light
Electric receiver array 22 and decision device 23 are electrically connected；In rearmounted transceiver 3, rearmounted driving 34 and rearmounted car light 35 are electrically connected,
Image acquisition device 31 is electrically connected with image processor 30, photoreceptor array 33 respectively, photoreceptor array 33 and judgement
Device 32 is electrically connected；In user interface 1, transceiver controller 10 respectively with speech processor 12, keyboard 13, speech player 14,
Display 15, touch screen 16 are electrically connected, and speech processor 12 is electrically connected with voice collector 11.
Image acquisition device, obtains obtaining image information for gathering real-time imaging, and exports to image processor 21；Preposition
Transceiver 2 is identical with the image acquisition device purposes of rearmounted transceiver 3.
Image processor, for the image information exported according to image acquisition device 20, identifies the position of the car plate in image
Put, the position of light in license plate number and image；Preposition transceiver 2 is identical with the image processor purposes of rearmounted transceiver 3.
Photoreceptor array, each photelectric receiver in array are all corresponding with image acquisition device pixel,
For sensing the visible light communication signal that the pixel positonlight sends, and be converted to analog electrical signal output；Preposition transmitting-receiving
Machine 2 is identical with the photoreceptor array purposes of rearmounted transceiver 3.
Decision device, for the instruction according to transceiver controller, selects corresponding photelectric receiver in photoreceptor array
Analog electrical signal output, and be converted into corresponding digital signal and export；Preposition transceiver 2 and the judgement of rearmounted transceiver 3
Device purposes is identical.
Preposition car light 24, for sending visible light signal, headlamp of the preposition car light 24 using automobile.
Pre-driver 25, for driving preposition car light 24 to send visible light signal.
Rearmounted car light 35, for sending visible light communication signal, clearance lamps, brake of the rearmounted car light using automobile rear
Lamp.
Rearmounted driving 34, for driving rearmounted car light 35 to send visible light signal；Pre-driver 25 and rearmounted driving 34 are all
It is drive circuit.
Preposition car light 24 and rearmounted car light 35 are all visible light communication car lights.
Voice collector 11, for obtaining phonetic control command, the speech talkback of user, and it is defeated to be converted to analog electrical signal
Go out.
Analog electrical signal, for processing the output of voice collector 11, is converted into digital signal simultaneously by speech processor 12
Output.
Keyboard 13, for being input into intercommunication license plate number and control instruction by key mode to device.
Touch screen 16, for by clicking mode on touch screen 16, selecting license plate number, the control shown on display 15
Instruction, and in the real-time imaging of the image acquisition device for showing on a display 15, select car plate visible with the vehicle of the car plate
The position of optic communication car light.
Speech player 14, the voice of information of voice prompt and intercommunication for playing device.
Display 15, needs the graph text information for showing for display device intercommunication；Graph text information, including：License plate number, man-machine
Interactive information, the real-time imaging of image acquisition device 11.
Transceiver controller 10, for realizing：1st, the output of speech processor 12 is processed, identifies speech form
Intercommunication information, license board information, command information；2nd, the signal output of keyboard 13, and the signal according to output is obtained, output is determined
Command information, license board information；3rd, the license plate number of image processor output is received, and in the position of car plate and image the position of light
Information, and determine the vehicle license plate number for needing to set up connection, and the visible light communication car light of the position of the car plate and the car
Positional information；4th, according to the light position information of visible light communication car light, control decision device and select the photoelectricity of corresponding pixel points to connect
Device is received, and receives the digital signal output of decision device；5th, the digital signal output of decision device is converted into corresponding data, instruction
Or voice signal；6th, control display shows corresponding graph text information；7th, voice message letter played by control voice player 14
Breath and the voice of intercommunication；8th, car plate data base is preserved；9th, the signal output of touch screen 16, and signal according to output are received,
It is converted into corresponding command information, license board information；10th, according to the real-time imaging shown on the display 15 that touch screen 16 is clicked
In car plate and car light, indicate that image processor 30 preferentially recognizes that this chooses the license plate number of car plate, and the vehicle be used for communicating
Visible light communication car light；11st, the Frame of visible light communication, according to speech talkback information, control information, is generated, and according to number
According to frame and the position of intercommunication vehicle, signal is sent to pre-driver 25 or rearmounted driving 34, then can by drive circuit driving
See that optic communication car light sends visible light signal.
The signal of communication of visible light communication car light talkback unit is sent as a data frame, and Frame includes：Synchronous code,
Target license plate, source car plate, data type, data length, data, check information, totally 7 fields.
Synchronous code, for keeping the data transmit-receive clock synchronization of two talkback units of intercommunication both sides, and represents one
The beginning of Frame.
Target license plate, needs the opponent vehicle license plate number for carrying out intercommunication for representing.
Source car plate, for representing the one's own side's vehicle license plate number for carrying out intercommunication；For police car, ambulance, the field can be
The license plate number information of vehicle itself, or special numeral combination.
Data type, for representing that the type of notebook data frame, the type of Frame include：Intercommunication request, radio voice, right
Say that request-reply, intercommunication request-reply confirm；Intercommunication request data frame is sent by intercommunication originating end, is responded to intercommunication for representing
End sends the request that intercommunication is set up；Intercommunication request-reply Frame is sent by intercommunication responder, for representing to intercommunication originating end
Send the request-reply that intercommunication is set up；Intercommunication request-reply confirms that Frame is sent by intercommunication originating end, and it is right to receive for expression
Request-reply Frame is said, confirms to set up connection；Radio voice Frame, for carrying the voice messaging that will send intercommunication.
Data length, for representing the length of data field in a Frame.
Data, for placing the voice messaging of intercommunication.
Check information, whether wrong for inspection data frame, for the mistake occurred in transmitting procedure is corrected.
Intercommunication both sides select the mode of the vehicle license plate number for setting up connection to have 4 kinds：1st, phonetic entry；2nd, input through keyboard；3、
Touch-screen menus are input into；4th, screen image input is touched.
License plate number is given an oral account in phonetic entry, user, the voice messaging for obtaining license plate number by voice collector, then by speech processes
After device process, output identifies license plate number to transceiver controller by transceiver controller.
Input through keyboard, user are input into license plate number by the button of keyboard to device.
Touch-screen menus are input into, and user is corresponding to touch screen 16 according to the picture and text information shown on display 15
Relative position click select intercommunication car plate license plate number.
Screen image input is touched, user is according to the real-time imaging got by image acquisition device shown on display 15
In, in car plate, car light that the relative position for corresponding to touch screen 16 clicks the vehicle that sees in image, then by transceiver controller 10
Control image processor captures the car plate in image, and identifies the position of license plate number and car light.
(2) B vehicle of the license plate number for capital BBBBBB, because failure independently cannot be travelled, it is capital to need by license plate number
The C vehicles of CCCCCC are dragged away, and two cars need intercommunication during towing, and keep in touch, and two sets of steps (1) are arranged
Visible light communication car light talkback unit is separately mounted on above-mentioned two motor vehicles, license plate number for capital CCCCCC C vehicles front
Side, using the rearmounted transceiver of its vehicle-mounted visible light communication car light talkback unit, is the B vehicles of capital BBBBBB with license plate number
Preposition transceiver is communicated, and realizes intercommunication, and the control process of intercommunication is as follows：
Firstly, it is necessary to connection is set up between C vehicles of the B vehicles and license plate number that license plate number is capital BBBBBB for capital CCCCCC,
Intercommunication is initiated by B vehicles, is concretely comprised the following steps：
T1, by using keyboard button, input need set up connection C vehicles license plate number：Capital CCCCCC.
T2, device identify license plate number：Capital CCCCCC, and capital CCCCCC is packed into Frame.
T3, the preposition car light for utilizing B vehicles, will ask the Frame for setting up connection to send using visible light communication signal.
T4, the preposition transceiver for passing through B vehicles, search and obtain license plate number：The position of the car plate of capital CCCCCC.
T5, according to license plate number：The position of the car plate of capital CCCCCC, positions the position of the visible light communication car light of C vehicles.
T6, navigate to the position of visible light communication car light of capital CCCCCC after, determine the photelectric receiver that should be read can
See optic communication signal, wait the intercommunication request-reply Frame from C vehicles, and carry out time-out count, enter following sub-step.
T6.1 works as before time-out count is completed, and receives the intercommunication request-reply Frame from capital CCCCCC, it is determined that
After communicating pair information of vehicles is errorless, opponent vehicle is locked, intercommunication request-reply is sent to capital CCCCCC and confirm Frame, and opened
Beginning intercommunication；Before completing in time-out count, as capital CCCCCC also initiates intercommunication to B vehicles, and receive from capital CCCCCC's
Intercommunication request data frame, then send the Frame of intercommunication request-reply to capital CCCCCC, waits from the right of capital CCCCCC transmissions
Say that request-reply confirms Frame.
If T6.2 is before time-out count is completed, intercommunication request-reply Frame, the intercommunication of capital CCCCCC are not received all the time
Request data frame, intercommunication request-reply confirm Frame, then return to step T3, and carry out connection failure counting；If connection
Fail count reaches setting value and does not still set up connection, just stops connection, and informs user's connection failure by voice, display.
(3) in the opposing party of intercommunication, vehicle of the license plate number for capital CCCCCC, except being capital BBBBBB such as license plate number
Vehicle equally initiate to talk with, be also in search for reception mode, search wait capital BBBBBB send intercommunication request, step
For：
R1, image information is obtained by the image acquisition device collection real-time imaging that installs on the C vehicles of capital CCCCCC, then by image
Reason device identifies the license plate number of all car plates and each car plate in image；Car plate data base is searched, for sending signal
It is the license plate number on blacklist, just directly shields；If the license plate number in unknown license plate number and address list, then enter
Next step.
R2, the position according to the car plate for searching license plate number, position the position of its visible light communication car light.
R3, by visible light communication car light position, determine the visible light signal that the photelectric receiver that should read is received；By
This search is that the visible light communication car light of which car plate has initiation intercommunication request.
R4, when receiving unwritten unknown license plate number in address list：Intercommunication request initiated by the vehicle of capital BBBBBB, then lead to
Cross voice, display to ask the user whether to agree to set up connection；If agreed to, to the data that the car sends intercommunication request-reply
Frame, and the intercommunication request-reply for waiting the vehicle from capital BBBBBB to send confirms Frame, prepares to start intercommunication.
(4) in intercommunication both sides, Frame will be verified, for the Frame that talkback unit is received, carry out as
Lower checking：
C1, confirm that by target license plate field whether one's own side be the destinations traffic vehicle that should be received：If it is, just subsequently being grasped
Make；Otherwise with regard to lost data frames.
C2, the source vehicle that comes for confirming to send Frame by source car plate field, and according to if the car plate in address list, just
Intercommunication request-reply Frame is directly returned；If the car plate in blacklist, Frame is just abandoned；If unknown car
Board, just first passes through voice broadcast, display and shows, then selects to be confirmed whether to receive by the user of target vehicle, if agreeing to connect
Receiving, Frame is abandoned if disagreeing and receiving；If it is police car, rescue to carry out source vehicle
Car, is just directly received Frame, and is shown by voice broadcast, display.
(5) after searching for and determining the position of a car plate, the position of its visible light communication car light, the process of positioning are positioned
As follows：
D1, the position for determining a car plate, and the car plate in the image that image acquisition device is obtained, the picture that the long side of car plate takes
Vegetarian refreshments number x, pixel number y that car plate broadside takes.
D2, construction rectangular coordinate system：Two diagonal intersection points with rectangle car plate as rectangular coordinate system origin, to pass through
Origin and parallel to long side straight line be transverse axis, right side be transverse axis positive direction；Be the longitudinal axis perpendicular to long side, top be the longitudinal axis just
Direction, a pixel are coordinate system long measure.
D3, one isosceles trapezoid of construction：The extended line of two waists of isosceles trapezoid through origin, two waists respectively with right angle
The positive axis of coordinate system transverse axis is spent in -60 degree and+60, with the extended line of the right edge of car plate as upper bottom, with the right side of car plate
2 times of side car plate length y is height；In the isosceles trapezoid region, the car light on the right side of the car plate of the car is searched in scanning from left to right.
D4, when the pixel that first brightness value for searching right side from left to right occurs saltus step be exactly the position that light is located
Put, arbiter is controlled by transceiver controller and selects the defeated of the corresponding photelectric receiver in photoreceptor array of the pixel
Go out；Parsing Frame is attempted, if it is possible to parse Frame, with regard to logarithm according to the output of decision device by transceiver controller again
Verified according to frame：If the source car plate field in Frame is consistent with the car plate, it is determined that the light is the visible of the car plate
Optic communication car light sends, and receives the visible light communication signal；If Frame cannot be parsed, previous step is will be returned to, after
Light in continuous Search Area.
D5, when determine right side light after, search again for the car light on the left of car plate, equally first construct an isosceles trapezoid：
The extended line of two waists of isosceles trapezoid through origin, two waists respectively with the negative semiaxis of rectangular coordinate system transverse axis in -60 degree and+
60 degree, with the left side extended line of car plate as upper bottom, with apart from 2 times of car plate length y of car plate left side as height；In the isosceles trapezoid
In region, the car light on the left of the car plate of the car is searched in scanning from right to left.
D6, when the pixel that first brightness value for searching left side from right to left occurs saltus step be exactly the position that light is located
Put, arbiter is controlled by transceiver controller and selects the defeated of the corresponding photelectric receiver in photoreceptor array of the pixel
Go out；Parsing Frame is attempted, if it is possible to parse Frame, with regard to logarithm according to the output of decision device by transceiver controller again
Verified according to frame, if the source car plate field in Frame is consistent with the car plate, it is determined that the light is the visible of the car plate
Optic communication car light sends, and receives the visible light communication signal；If Frame cannot be parsed, previous step is will be returned to, after
Light in continuous Search Area.
D7, the two positions are locked after position all determines in image acquisition device, then when bilateral light；And in the next one
At the image acquisition moment of image acquisition device, search for the two positions and its adjacent pixel, brightness value whether with upper one
The collection moment is close to, and to determine light position, and parses Frame, logarithm by transceiver controller according to the output of decision device
Verified according to frame, if the source car plate field in Frame is consistent with the car plate, it is determined that the light is the visible of the car plate
Optic communication car light sends, and receives the visible light communication signal；If due to blocking or other reasonses, causing this step cannot
Execute, then jump to D1, reposition car light.
Claims (1)
1. a kind of visible light communication car light intercommunication method with License Plate, it is characterised in that concretely comprise the following steps：
(1) a kind of visible light communication car light talkback unit is set, including：Preposition transceiver, rearmounted transceiver and user interface；Before
Transceiver is put, including：Image acquisition device, image processor, photoreceptor array, decision device, preposition car light, pre-driver；
Rearmounted transceiver, including：Image acquisition device, image processor, photoreceptor array, decision device, rearmounted car light, rearmounted drive
Dynamic；User interface, including：Voice collector, speech processor, keyboard, speech player, transceiver controller, display, touch
Screen；
User interface respectively with preposition transceiver, rearmounted transmitting-receiving mechatronics；In preposition transceiver, pre-driver and preposition car
Lamp is electrically connected, and image acquisition device electrically connected with image processor, photoreceptor array respectively, photoreceptor array and judgement
Device is electrically connected；In rearmounted transceiver, rearmounted driving and rearmounted car light electrically connect, image acquisition device respectively with image processor,
Photoreceptor array is electrically connected, and photoreceptor array and decision device are electrically connected；In user interface, transceiver controller is distinguished
Electrically connect with speech processor, keyboard, speech player, display, touch screen, speech processor is electrically connected with voice collector
Connect；
Image acquisition device, obtains obtaining image information for gathering real-time imaging, and exports to image processor；Preposition transceiver
Identical with the image acquisition device purposes of rearmounted transceiver；
Image processor, for the image information exported according to image acquisition device, identifies the position of the car plate in image, car plate
Number and image in light position；Preposition transceiver is identical with the image processor purposes of rearmounted transceiver；
Photoreceptor array, each photelectric receiver in array are all corresponding with image acquisition device pixel, are used for
Sense the visible light communication signal that the pixel positonlight sends, and be converted to analog electrical signal output；Preposition transceiver and
The photoreceptor array purposes of rearmounted transceiver is identical；
Decision device, for the instruction according to transceiver controller, selects the mould of corresponding photelectric receiver in photoreceptor array
Intend electric signal output, and be converted into corresponding digital signal and export；The decision device purposes of preposition transceiver and rearmounted transceiver
Identical；
Preposition car light, for sending visible light signal, headlamp of the preposition car light using automobile；
Pre-driver, for driving preposition car light to send visible light signal；
Rearmounted car light, for sending visible light communication signal, clearance lamps, brake lamp of the rearmounted car light using automobile rear；
Rearmounted driving, for driving rearmounted car light to send visible light signal；Pre-driver and rearmounted driving are all drive circuits；
Preposition car light and rearmounted car light are all visible light communication car lights；
Voice collector, for obtaining phonetic control command, the speech talkback of user, and is converted to analog electrical signal output；
Analog electrical signal, for processing the output of voice collector, is converted into digital signal and is exported by speech processor；
Keyboard, for being input into intercommunication license plate number and control instruction by key mode to device；
Touch screen, for by clicking mode on the touchscreen, selecting license plate number, the control instruction shown on display, and
Visible light communication car light on the vehicle of car plate and the car plate is selected in the real-time imaging of the image acquisition device for showing over the display
Position；
Speech player, the voice of information of voice prompt and intercommunication for playing device；
Display, needs the graph text information for showing for display device intercommunication；Graph text information, including：License plate number, man-machine interaction letter
Breath, the real-time imaging of image acquisition device；
Transceiver controller, for realizing：1st, the output of speech processor is processed, identifies the intercommunication letter of speech form
Breath, license board information, command information；2nd, the signal output of keyboard, and the signal according to output is obtained, the instruction letter of output is determined
Breath, license board information；3rd, the license plate number of reception image processor output, the positional information of light in the position of car plate and image,
And determine the vehicle license plate number for needing to set up connection, and the position letter of the visible light communication car light of the position of the car plate and the car
Breath；4th, according to the light position information of visible light communication car light, the photelectric receiver that decision device selects corresponding pixel points is controlled, and
Receive the digital signal output of decision device；5th, the digital signal output of decision device is converted into corresponding data, instruction or language
Message number；6th, control display shows corresponding graph text information；7th, control voice player plays information of voice prompt and intercommunication
Voice；8th, car plate data base is preserved；9th, the signal output of touch screen, and the signal according to output is received, is converted into corresponding
Command information, license board information；10th, according to the car plate and car in the real-time imaging shown on the display that touch screen is clicked
Lamp, indicates that image processor preferentially recognizes that this chooses the license plate number of car plate, and the vehicle is used for the visible light communication car of communication
Lamp；11st, the Frame of visible light communication, according to speech talkback information, control information, is generated, and according to Frame and intercommunication car
Position, send signal to pre-driver or rearmounted driving, then drive visible light communication car light to send by drive circuit can
See optical signal；
When in front and back's two cars carry out intercommunication, front truck is led to the preposition transceiver of rear car using the rearmounted transceiver of this car
Letter；Rear car is communicated with the rearmounted transceiver of front truck using the preposition transceiver of this car；When to carrying out intercommunication to two cars, two
Car is communicated with the rearmounted transceiver of front truck using the preposition transceiver of this car；
The signal of communication of visible light communication car light talkback unit is sent as a data frame, and Frame includes：Synchronous code, target
Car plate, source car plate, data type, data length, data, check information, totally 7 fields；
Synchronous code, for keeping the data transmit-receive clock synchronization of two talkback units of intercommunication both sides, and represents data
The beginning of frame；
Target license plate, needs the opponent vehicle license plate number for carrying out intercommunication for representing；
Source car plate, for representing the one's own side's vehicle license plate number for carrying out intercommunication；For police car, ambulance, the field can be vehicle
The license plate number information of itself, or special numeral combination；
Data type, for representing that the type of notebook data frame, the type of Frame include：Intercommunication request, radio voice, intercommunication are asked
Response, intercommunication request-reply is asked to confirm；Intercommunication request data frame is sent by intercommunication originating end, is sent out to intercommunication responder for representing
The request for sending intercommunication to set up；Intercommunication request-reply Frame is sent by intercommunication responder, is sent to intercommunication originating end for representing
The request-reply that intercommunication is set up；Intercommunication request-reply confirms that Frame is sent by intercommunication originating end, for representing that receiving intercommunication asks
Reply data frame is sought, confirms to set up connection；Radio voice Frame, for carrying the voice messaging that will send intercommunication；
Data length, for representing the length of data field in a Frame；
Data, for placing the voice messaging of intercommunication；
Check information, whether wrong for inspection data frame, for the mistake occurred in transmitting procedure is corrected；
Car plate data base, the address list for having license plate number, the blacklist for having license plate number；
Intercommunication both sides select the mode of the vehicle license plate number for setting up connection to have 4 kinds：1st, phonetic entry；2nd, input through keyboard；3rd, touch
Screen menu input；4th, screen image input is touched；
License plate number is given an oral account in phonetic entry, user, the voice messaging for obtaining license plate number by voice collector, then by speech processor
After reason, output identifies license plate number to transceiver controller by transceiver controller；
Input through keyboard, user are input into license plate number by the button of keyboard to device；
Touch-screen menus are input into, and picture and text information of the user according to display on display, in the relative position for corresponding to touch screen
Put and click on the license plate number for selecting intercommunication car plate；
Touch screen image input, user according on display show the real-time imaging got by image acquisition device in, right
Car plate, the car light of the vehicle that sees in image should be clicked to the relative position of touch screen, then image is controlled by transceiver controller
Reason device captures the car plate in image, and identifies the position of license plate number and car light；
(2) the visible light communication car light talkback unit for arranging two sets of steps (1) is labeled as I terminals and II terminals, I terminals and II
Terminal is separately mounted on two motor vehicles for needing intercommunication, i.e., on vehicle of the I terminals installed in license plate number for cp1, II terminals are pacified
It is mounted on the vehicle that license plate number is cp2；The control process of intercommunication is as follows：
Firstly, it is necessary to be between the vehicle of the vehicle of cp1 and the license plate number of II terminals for cp2 in the license plate number for being mounted with I terminals
Connection is set up, intercommunication is initiated by I terminals, is concretely comprised the following steps：
T1, license plate number cp2 of the vehicle connected by using button, voice, touch screen, input needs foundation；
T2, device identify license plate number cp2, and cp2 is packed into Frame；
T3, the preposition car light using I terminals, rearmounted car light, the Frame that will be asked to set up connection using visible light communication signal
Send；
T4, the preposition transceiver for passing through I terminals, rearmounted transceiver, search the position of the car plate for obtaining license plate number cp2；
T5, the position according to the car plate of license plate number cp2, position the position of the visible light communication car light of II terminals；
T6, navigate to the position of visible light communication car light of II terminals after, determine that the visible ray of the photelectric receiver that should be read leads to
Letter signal, waits the intercommunication request-reply Frame from II terminals, and carries out time-out count, enters following sub-step；
T6.1 receive the intercommunication request-reply Frame from II terminals when before time-out count is completed, it is determined that communication is double
After square information of vehicles is errorless, opponent vehicle is locked, intercommunication request-reply is sent to II terminals and confirm Frame, and start intercommunication；
Before completing in time-out count, the intercommunication request data frame from II terminals is received, then intercommunication request-reply is sent to II terminals
Frame, wait from II terminals send intercommunication request-reply confirm Frame；
If not receiving the intercommunication request-reply Frame of II terminals, intercommunication request data frame, right after T6.2 time-out counts are complete yet
Say that request-reply confirms Frame, then return to step T3, and carry out connection failure counting；If connection failure is counted to reach and is set
Definite value does not still set up connection, just stops connection, and informs user's connection failure by voice, display；
(3) in the II terminals of intercommunication, except initiating to talk with as I terminals, it is also in searching for reception mode, searches
Rope receives mode, and step is：
R1, image information is obtained by image acquisition device collection real-time imaging, then identified by image processor all in image
Car plate and the license plate number of each car plate；Search car plate data base, for blacklist in license plate number, just directly shielding；If
It is the license plate number in unknown license plate number and address list, then enters next step；
R2, the position according to the car plate for searching license plate number, position the position of its visible light communication car light；
R3, by visible light communication car light position, determine the visible light signal that the photelectric receiver that should read is received；Thus search
Rope is that the visible light communication car light of which car plate has initiation intercommunication request；
R4, when initiate intercommunication request be license plate number or police car, ambulance in address list, then it is right to send to the car
The Frame of request-reply is said, and waits the intercommunication request-reply sent from the car to confirm Frame, prepare to start intercommunication；
R5, it is unknown license plate number that car plate data base does not have when initiate intercommunication request, then user is inquired by voice, display
Whether connection is set up in agreement；If agreed to, to the Frame that the car sends intercommunication request-reply, and wait from the car transmission
Intercommunication request-reply confirm Frame, prepare start intercommunication；Conversely, then abandoning Frame, ignore intercommunication；
(4) in intercommunication both sides, Frame will be verified, for the Frame that talkback unit is received, is tested as follows
Card：
C1, confirm that by target license plate field whether one's own side be the destinations traffic vehicle that should be received：If it is, just subsequently being grasped
Make；Otherwise with regard to lost data frames；
C2, the source vehicle that comes for confirming to send Frame by source car plate field, and according to if the car plate in address list, just direct
Return intercommunication request-reply Frame；If the car plate in blacklist, Frame is just abandoned；If unknown car plate, just
First pass through voice broadcast, display to show, then select to be confirmed whether to receive by the user of target vehicle, send out if agreeing to receive
Intercommunication request-reply Frame is sent, and Frame is abandoned if disagreeing and receiving；If it is police car, ambulance to carry out source vehicle, just
Frame is directly received, and is shown by voice broadcast, display；
(5) after searching for and determining the position of a car plate, the position of its visible light communication car light is positioned, the process of positioning is such as
Under：
D1, the position for determining a car plate, and the car plate in the image that image acquisition device is obtained, the picture that the long side of car plate takes
Vegetarian refreshments number x, pixel number y that car plate broadside takes；
D2, construction rectangular coordinate system：Two diagonal intersection points with rectangle car plate as rectangular coordinate system origin, with pass through origin
And parallel to long side straight line be transverse axis, right side be transverse axis positive direction；It is the longitudinal axis perpendicular to long side, top is that the longitudinal axis is square
To a pixel is coordinate system long measure；
D3, one isosceles trapezoid of construction：The extended line of two waists of isosceles trapezoid through origin, two waists respectively with rectangular coordinate
Be the positive axis of transverse axis in -60 degree and+60 degree, with the extended line of the right edge of car plate as upper bottom, with apart from 2 times of car plate right edge
Car plate length y is height；In the isosceles trapezoid region, the car light on the right side of the car plate of the car is searched in scanning from left to right；
The pixel that D4, a brightness value on the right side of searching from left to right occur saltus step is just predicted as the position that light is located
Put, arbiter is controlled by transceiver controller and selects the defeated of the corresponding photelectric receiver in photoreceptor array of the pixel
Go out；Parsing Frame is attempted, if it is possible to parse Frame, with regard to logarithm according to the output of decision device by transceiver controller again
Verified according to frame：If the source car plate field in Frame is consistent with the car plate, it is determined that the light is the visible of the car plate
Optic communication car light sends, and receives the visible light communication signal；If Frame cannot be parsed, previous step is will be returned to, after
Light in continuous Search Area；
D5, when determine right side light after, search again for the car light on the left of car plate, equally first construct an isosceles trapezoid：Isosceles
Through origin, two waists are respectively with the negative semiaxis of rectangular coordinate system transverse axis in -60 degree and+60 for the extended line of two trapezoidal waists
Degree, with the left side extended line of car plate as upper bottom, with apart from 2 times of car plate length y of car plate left side as height；In the isosceles trapezoid area
In domain, the car light on the left of the car plate of the car is searched in scanning from right to left；
The pixel that D6, a brightness value on the left of searching from right to left occur saltus step is just predicted as the position that light is located
Put, arbiter is controlled by transceiver controller and selects the defeated of the corresponding photelectric receiver in photoreceptor array of the pixel
Go out；Parsing Frame is attempted, if it is possible to parse Frame, with regard to logarithm according to the output of decision device by transceiver controller again
Verified according to frame, if the source car plate field in Frame is consistent with the car plate, it is determined that the light is the visible of the car plate
Optic communication car light sends, and receives the visible light communication signal；If Frame cannot be parsed, previous step is will be returned to, after
Light in continuous Search Area；
D7, the two positions are locked after position all determines in image acquisition device, then when bilateral light；And in next image
At the image acquisition moment of harvester, the two positions and its adjacent pixel is searched for, whether brightness value is gathered with upper one
Moment is close to, and to determine light position, and parses Frame by transceiver controller according to the output of decision device, to Frame
Verified, if the source car plate field in Frame is consistent with the car plate, it is determined that the light is that the visible ray of the car plate leads to
Letter car light sends, and receives the visible light communication signal；If due to blocking or other reasonses, causing this step hold
OK, then the 1st step is jumped to, car light is repositioned.
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| CN109347556A (en) * | 2018-10-30 | 2019-02-15 | 广西科技大学 | A kind of underwater communications system based on visible light |
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| CN105978990A (en) * | 2016-06-20 | 2016-09-28 | 云传电扬科技（北京）有限责任公司 | Real-time communication system and communication method between vehicles based on visible light communication |
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| CN108528326A (en) * | 2018-04-04 | 2018-09-14 | 佛山市艾温特智能科技有限公司 | A kind of vehicle-mounted method that interconnects |
| CN108616306A (en) * | 2018-04-04 | 2018-10-02 | 佛山市艾温特智能科技有限公司 | The vehicle-mounted method that interconnects of one kind, computer readable storage medium and car-mounted terminal |
| CN108528326B (en) * | 2018-04-04 | 2020-06-23 | 王小红 | Vehicle-mounted interconnection method |
| CN108616306B (en) * | 2018-04-04 | 2020-06-26 | 深圳市晟丰达科技有限公司 | Vehicle-mounted interconnection method, computer readable storage medium and vehicle-mounted terminal |
| CN108566247A (en) * | 2018-04-27 | 2018-09-21 | 佛山市艾温特智能科技有限公司 | A kind of vehicle-mounted exchange method to interconnect, readable storage medium storing program for executing and car-mounted terminal |
| CN109347556A (en) * | 2018-10-30 | 2019-02-15 | 广西科技大学 | A kind of underwater communications system based on visible light |
| CN110113729A (en) * | 2019-04-30 | 2019-08-09 | 上海掌门科技有限公司 | The communication means and mobile unit of mobile unit |
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Application publication date: 20170315 Assignee: GUILIN JINYIXING TECHNOLOGY DEVELOPMENT Co.,Ltd. Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2023980044509 Denomination of invention: A visible light communication vehicle light intercom method with license plate positioning Granted publication date: 20190412 License type: Common License Record date: 20231030 |