CN109774502B - Intelligent wireless charging device for electric automobile - Google Patents

Intelligent wireless charging device for electric automobile Download PDF

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CN109774502B
CN109774502B CN201811527738.8A CN201811527738A CN109774502B CN 109774502 B CN109774502 B CN 109774502B CN 201811527738 A CN201811527738 A CN 201811527738A CN 109774502 B CN109774502 B CN 109774502B
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license plate
charging
image
charge
wireless charging
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CN109774502A (en
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蒋笑
邢普润
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Huizhou Huazhi New Energy Technology Co ltd
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Huizhou Huazhi New Energy Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

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Abstract

The invention provides an intelligent wireless charging device for an electric automobile, which comprises: the charging pile body is connected with the wireless charging emission plate through a cable, a plurality of charging coils are arranged in the wireless charging emission plate in a layered mode and convert electric energy into electromagnetic waves to be transmitted to the wireless charging receiving plate at the bottom of the electric automobile; an image collector is arranged on the charging pile body and used for collecting license plate images of the electric automobile; the data processor is connected with the image collector, and is used for identifying and processing the license plate image of the electric automobile, acquiring the license plate information of the electric automobile and sending the acquired license plate information to the expense calculation system; the charging controller controls an external power supply to supply power to a charging coil in the wireless charging transmitting plate through a cable, calculates the charging amount and sends charging amount information to the charge calculation system; and the charge calculation system inquires the charge balance of the license plate information according to the received license plate information. The invention realizes the full-automatic and intelligent wireless charging process and is convenient and fast to use.

Description

Intelligent wireless charging device for electric automobile
Technical Field
The invention relates to the technical field of intelligent interaction, in particular to an intelligent wireless charging device for an electric automobile.
Background
With the shortage of energy and the aggravation of environmental pollution in modern society, electric vehicles have been widely paid attention to as new energy vehicles once they are launched. The electric automobile is a vehicle which takes a vehicle-mounted power supply as power, utilizes a motor to drive wheels to run and meets various requirements of road traffic and safety regulations. However, most of the existing electric vehicles are limited by battery capacity, the driving distance is short, meanwhile, the battery charging time of the electric vehicle is long, and the corresponding charging station resources are poor, which becomes the biggest bottleneck restricting the application and popularization of the electric vehicle.
Wireless charging is the transfer of electrical energy mediated by a coupled electromagnetic field. Compared with contact charging, wireless charging has the advantages of convenience in use, no spark, no electric shock hazard, no mechanical abrasion, adaptability to various severe environments and weathers, convenience in realizing unmanned automatic charging, movable charging and the like, and becomes the mainstream mode of charging of future electric vehicles.
At present, the wireless electric pile that fills that comes into service in the market needs the user to stop the car to appointed position when using, gets off by the user and operates on filling electric pile's control panel, opens wireless charging and accomplishes a large amount of operations such as the charge procedure after charging, and the convenient degree of use remains to be improved.
Disclosure of Invention
In view of the above problems, the present invention is directed to an intelligent wireless charging device for an electric vehicle.
The purpose of the invention is realized by adopting the following technical scheme:
an electric automobile intelligence wireless charging device includes: the charging pile comprises a charging pile body, a cable and a wireless charging transmitting plate;
the charging pile body is connected with the wireless charging transmitting plate through the cable,
the wireless charging transmitting plate is internally provided with a plurality of charging coils in a layered manner and used for converting electric energy into electromagnetic waves and transmitting the electromagnetic waves to the wireless charging receiving plate at the bottom of the electric automobile;
fill and be provided with charge controller, data processor, expense computing system and image collector on the electric pile body, wherein:
the image collector is used for collecting the license plate image of the electric automobile;
the data processor is connected with the image collector and used for identifying and processing the license plate image of the electric automobile, acquiring license plate information of the electric automobile and sending the acquired license plate information to the expense calculation system;
the charging controller is used for controlling an external power supply to supply power to a charging coil in the wireless charging transmitting panel through a cable, calculating a charging amount and sending charging amount information to the charge calculation system;
the charge calculation system is used for inquiring the charge balance of the license plate information from the background server according to the received license plate information; and calculating corresponding charging cost according to the charging amount information and sending the charging cost to the background server, so that the background server deducts the corresponding charging cost from the cost balance of the license plate information.
In one embodiment, the fare calculation system comprises: the system comprises a charge calculation module and a charge management module;
and the charge calculation module is used for calculating corresponding charging charge according to the charging amount information and sending the charging charge to the background server, so that the background server deducts the corresponding charging charge from the charge balance of the license plate information.
The charge management module is used for inquiring the charge balance of the license plate information from the background server according to the received license plate information, and when the charge balance is larger than zero, a pass instruction is sent to the charge manager, so that the charge controller receives the pass instruction and then controls the external power supply to supply power to the charging coil in the wireless charging emission plate through the cable.
The invention has the beneficial effects that: according to the invention, the image collector and the data processor are arranged on the charging pile body to identify the license plate information of the electric automobile, the charge calculation system inquires account balance according to the license plate information, when the account is not in shortage, an external power supply is controlled to be connected with the charging coil to charge the electric automobile, corresponding charge is automatically deducted from the account corresponding to the license plate information after wireless charging is completed, a full-automatic and intelligent wireless charging process is realized, the use is very convenient, and the operation amount required by the wireless charging of an automobile owner can be effectively reduced.
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The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a block diagram of the frame of the present invention;
FIG. 2 is a block diagram of the framework of the fee calculation system of the present invention;
FIG. 3 is a block diagram of a data processor according to the present invention.
Reference numerals:
charging pile body 1, cable 2, wireless charging transmitting plate 3, charging controller 4, data processor 5, fee calculating system 6, image collector 7, fee calculating module 61, fee managing module 62, preprocessing unit 51, license plate positioning unit 52, character dividing unit 53, binarization unit 54, feature extracting unit 55, character recognizing unit 56
Detailed Description
The invention is further described in connection with the following application scenarios.
Referring to fig. 1, it shows an intelligent wireless charging device for an electric vehicle, comprising: the charging pile comprises a charging pile body 1, a cable 2 and a wireless charging transmitting plate 3;
the charging pile body 1 is connected with the wireless charging transmitting plate 3 through the cable 2,
the wireless charging transmitting plate 3 is internally provided with a plurality of charging coils in a layered manner, and the charging coils are used for converting electric energy into electromagnetic waves and transmitting the electromagnetic waves to a wireless charging receiving plate at the bottom of the electric automobile;
the charging pile body 1 is provided with a charging controller 4, a data processor 5, a charge calculation system 6 and an image collector 7,
the image collector 7 is used for collecting a license plate image of the electric automobile;
the data processor 5 is connected with the image collector 7 and is used for identifying and processing the license plate image of the electric automobile, acquiring license plate information of the electric automobile and sending the acquired license plate information to the fee calculation system 6;
the charging controller 4 is used for controlling an external power supply to supply power to a charging coil in the wireless charging transmitting plate 3 through the cable 2, calculating a charging amount and transmitting charging amount information to the charge calculating system 6;
the charge calculation system 6 is used for inquiring the charge balance of the license plate information from the background server according to the received license plate information; and calculating corresponding charging cost according to the charging amount information and sending the charging cost to the background server, so that the background server deducts the corresponding charging cost from the cost balance of the license plate information.
In one embodiment, referring to FIG. 2, the fee calculation system 6 includes: a fee calculation module 61 and a fee management module 62;
and the charge calculation module 61 is configured to calculate a corresponding charging charge according to the charging amount information and send the charging charge to the background server, so that the background server deducts the corresponding charging charge from the charge balance of the license plate information.
The charge management module 62 is configured to query a charge balance of the license plate information from the background server according to the received license plate information, and when the charge balance is greater than zero, send a pass instruction to the charging manager, so that the charging controller 4 receives the pass instruction and then controls the external power supply to supply power to the charging coil in the wireless charging transmitting plate 3 through the cable 2.
In one scene, a user can recharge the balance of the formulated license plate information in a mobile phone APP or mobile payment mode;
according to the embodiment of the invention, the image collector 7 and the data processor 5 are arranged on the charging pile body 1 to identify the license plate information of the electric vehicle, the charge calculation system 6 inquires account balance according to the license plate information, when the account is not owed, an external power supply is controlled to be switched on to charge the electric vehicle, and after the wireless charging is finished, the corresponding charge is automatically deducted from the account corresponding to the license plate information, so that the full-automatic and intelligent wireless charging process is realized, the use is very convenient, and the operation amount required by the vehicle owner for the wireless charging can be effectively reduced.
In one embodiment, the bottom of the charging pile body 1 is provided with a movable wheel.
In an embodiment, still be equipped with infrared distance measuring device on filling electric pile body 1 for the monitoring is measured the vehicle and is filled the distance between electric pile body 1, and reports through the broadcaster on it.
According to the embodiment of the invention, the movable wheels are arranged on the charging pile body 1, so that the position of the charging device can be flexibly set, and the installation convenience is improved; in addition, fill and be equipped with infrared range unit on the electric pile body 1, can detect the distance between electric automobile and the charging device and make the alarm, improve the security performance when electric automobile carries out wireless charging.
In one embodiment, the image collector 7 is a high-definition camera.
In one embodiment, referring to fig. 3, the data processor 5 comprises:
the preprocessing unit 51 is used for performing enhancement denoising processing on the acquired license plate image of the electric vehicle to acquire a preprocessed license plate image;
the license plate positioning unit 52 is used for detecting the feature points of the preprocessed license plate image, determining a license plate region and segmenting license plate sub-images;
the character segmentation unit 53 is used for carrying out license plate scale estimation and character segmentation processing on the license plate sub-images to obtain character images;
a binarization unit 54 that performs binarization processing on the character image to obtain a binarized character image;
a feature extraction unit 55 that performs feature extraction processing on the binarized character image to obtain feature parameters of the binarized character image;
the character recognition unit 56 compares the acquired feature parameters with pre-stored character feature parameters to acquire a character recognition result and a license plate recognition result.
In the above embodiment of the present invention, the data processor 5 first performs an enhanced denoising preprocessing on the acquired license plate image of the electric vehicle, removes noise interference in the acquired license plate image, and enhances edge characteristics in the image; then, positioning a license plate area of the electric automobile in the license plate image, and segmenting a license plate sub-image; further segmenting the segmented license plate sub-image, segmenting characters in the license plate from the license plate sub-image, and acquiring a character image; the character images are respectively subjected to binarization processing, and a foundation is laid for character recognition; performing feature extraction on the binary character image to obtain character feature parameters, then comparing the obtained character feature parameters with pre-stored character feature parameters, identifying character results, and combining the character results to obtain a license plate identification result; the data processor 5 adopts a unit-divided structure, so that the data processing efficiency can be improved, and the license plate recognition performance of the charging device is improved.
In an embodiment, the preprocessing unit 51 performs enhancement and denoising processing on the acquired license plate image of the electric vehicle to acquire a preprocessed license plate image, and specifically includes:
(1) initializing the iteration number j to 0, and obtaining the license plate image of the electric automobile by the iteration step length delta b, receiving the license plate image of the electric automobile and carrying out gray processing on the license plate imageLicense plate gray level image as R0
(2) Enhancing the license plate gray level image, wherein the adopted self-defined image enhancement function is as follows:
Figure GDA0002226982930000041
in the formula, Rj+1And RjRespectively representing the license plate gray level images in j +1 iteration enhancement processing and j iteration enhancement processing, and E representing the number of sub-windows, wherein the window size is r multiplied by r, the image size is M multiplied by N, and then E is (M-r +1) multiplied by (N-r +1), gjA tangential spread function representing a second order partial derivative model at the present time, wherein,
Figure GDA0002226982930000042
H(R(i)j) Represents the normalized histogram in the ith window for j iterations, K (i)maxAnd K (i)minRespectively represent the maximum gray value and the minimum gray value in the ith window, Δ b represents the iteration step size, 0<Δb≤1，ωpRepresenting the tangential smoothing adjustment factor, ωqRepresenting an enhancement scale factor; deltaxAnd deltayRepresenting the forward and backward difference values, delta, of the partial derivatives, respectivelyxx、δxy、δyyRespectively, a finite difference approximation of the second partial derivative, e denotes an adjustment factor,
Figure GDA0002226982930000043
representing an image gradient vector, v representing a set edge adjustment factor, and τ representing a set gray scale influence factor;
(3) updating the iteration number j to j +1, and outputting R if the iteration number is larger than the set maximum iteration numberjAs a preprocessed license plate image; otherwise, returning to the step (2) for further processing;
preferably, r is 3 and Δ b is 0.5;
according to the embodiment of the invention, the license plate image is subjected to enhancement and denoising processing by adopting the method, and in each iteration period, the license plate image is subjected to push-type enhancement and denoising processing by setting the processing window, so that noise in the license plate image can be smoothed, meanwhile, the edge part in the image can be well protected, the denoising and enhancing effects are obvious, the influence of environmental noise caused by the wireless charging device can be effectively reduced, and a foundation is laid for the wireless charging device to accurately identify the license plate information of the electric vehicle.
In one embodiment, the binarization unit 54 performs binarization processing on the character image to obtain a binarized character image, and specifically includes:
carrying out gray level adjustment processing on the character image, wherein the adopted gray level adjustment function is as follows:
Figure GDA0002226982930000051
in the formula, S (x, y) represents the gray value of the character image pixel point (x, y), HdIndicating the set image pixel mean adjustment parameter,
Figure GDA0002226982930000052
indicating the set image pixel variance adjustment parameter,
Figure GDA0002226982930000053
represents the average value of the gray levels of all the pixel points in the original image,
Figure GDA0002226982930000054
expressing the gray variance of all pixel points in the character image, and expressing the gray value of the pixel point (x, y) of the character image after gray adjustment by S' (x, y);
carrying out binarization processing on the image after the gray level adjustment processing to obtain a binarization character image, wherein the adopted user-defined binarization function is as follows:
Figure GDA0002226982930000055
in the formula, b (x, y) represents the gray value of the pixel point (x, y) of the binary character image after the binary processing, and S′(x, y) representation of the gray-scaled characterThe gray value of the image pixel point (x, y), phi (x, y), represents the adaptive judgment threshold, wherein,
Figure GDA0002226982930000056
mu represents a set standard differential state factor, k represents a set adjustment threshold adjustment factor, h (a, b) represents the gray scale value of the pixel (a, b) in the r × r neighborhood centered on the pixel (x, y), and m (x, y) represents the gray scale average of the pixel in the r × r neighborhood centered on the pixel (x, y).
According to the embodiment of the invention, the character image is subjected to binarization processing by adopting the method, firstly, the gray level of the character image is adjusted, so that the brightness difference in the character image can be effectively adjusted, and the gray level distribution of the character image is basically consistent; and then, the adjusted character image is subjected to binarization processing, the brightness information in the image is further removed, only the character information is reserved as useful information, the method can adapt to different background and brightness conditions, has high accuracy and strong robustness, and provides guarantee for accurate identification of the subsequent character.
In one embodiment, the feature extraction unit 55 performs a feature extraction process on the binarized character image to obtain feature parameters of the binarized character image, and specifically includes:
(1) calculating gradient characteristics of pixel points in the binary character image, wherein the adopted self-defined gradient characteristic function is as follows:
Figure GDA0002226982930000061
in the formula, b' (x, y) represents the gray value of the pixel point (x, y) of the binary character image, and theta (x, y) represents the gradient characteristic of the pixel point (x, y);
(2) dividing the binary character image into cells with the size of 8 multiplied by 8 pixels, and calculating gradient feature histograms of all pixel points in each cell according to the gradient features of the pixel points in the obtained binary character image;
(3) combining two adjacent 2 x 2 unit cells into a subblock, cascading gradient feature histograms corresponding to all the unit cells in the subblock and normalizing the gradient feature histograms according to an L2 norm rule to obtain a normalized gradient feature histogram of the subblock;
(4) and cascading the normalized gradient feature histograms of all the subblocks in the binary character image to form the feature parameters of the binary character image.
According to the embodiment of the invention, the binary character image is subjected to feature extraction processing by adopting the above method, the gradient feature of each pixel point in the binary character image is extracted by adopting a user-defined gray scale feature function, then the binary character image is divided into different cells, a histogram is constructed according to the gradient feature of the pixel points in the cells, the histograms of adjacent cells are normalized to establish a new histogram, then the normalized histograms of all subblocks are cascaded to be used as the feature parameter of the binary character image, the dimension of the feature parameter is higher, the feature of the character can be accurately described, and the recognition effect is good.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be analyzed by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (5)

1. The utility model provides an electric automobile intelligence wireless charging device which characterized in that includes: the charging pile comprises a charging pile body, a cable and a wireless charging transmitting plate;
the charging pile body is connected with the wireless charging transmitting plate through the cable,
the wireless charging transmitting plate is internally provided with a plurality of charging coils in a layered manner and used for converting electric energy into electromagnetic waves and transmitting the electromagnetic waves to the wireless charging receiving plate at the bottom of the electric automobile;
fill and be provided with charge controller, data processor, expense computing system and image collector on the electric pile body, wherein:
the image collector is used for collecting the license plate image of the electric automobile;
the data processor is connected with the image collector and used for identifying and processing the license plate image of the electric automobile, acquiring license plate information of the electric automobile and sending the acquired license plate information to the expense calculation system;
the charging controller is used for controlling an external power supply to supply power to a charging coil in the wireless charging transmitting panel through a cable, calculating a charging amount and sending charging amount information to the charge calculation system;
the charge calculation system is used for inquiring the charge balance of the license plate information from the background server according to the received license plate information; calculating corresponding charging cost according to the charging amount information and sending the charging cost to the background server, so that the background server deducts the corresponding charging cost from the cost balance of the license plate information;
wherein the data processor comprises:
the preprocessing unit is used for carrying out enhancement denoising processing on the acquired license plate image of the electric automobile and acquiring a preprocessed license plate image;
the license plate positioning unit is used for detecting the feature points of the preprocessed license plate image, determining a license plate region and segmenting a license plate sub-image;
the character segmentation unit is used for carrying out license plate scale estimation and character segmentation processing on the license plate sub-images to obtain character images;
a binarization unit for performing binarization processing on the character image to obtain a binarized character image;
the characteristic extraction unit is used for carrying out characteristic extraction processing on the binary character image to obtain characteristic parameters of the binary character image;
the character recognition unit is used for comparing the acquired characteristic parameters with pre-stored character characteristic parameters to acquire character recognition results and license plate recognition results;
the preprocessing unit is used for performing enhancement and denoising processing on the acquired license plate image of the electric vehicle to acquire the preprocessed license plate image, and specifically comprises:
(1) initializing the iteration number j to 0, iterating the step length delta b, receiving the license plate image of the electric automobile, graying the license plate image to obtain a license plate gray image as R0
(2) Enhancing the license plate gray level image, wherein the adopted self-defined image enhancement function is as follows:
Figure FDA0002226982920000021
in the formula, Rj+1And RjRespectively representing the license plate gray level images in j +1 iteration enhancement processing and j iteration enhancement processing, and E representing the number of sub-windows, wherein the window size is r multiplied by r, the image size is M multiplied by N, and then E is (M-r +1) multiplied by (N-r +1), gjA tangential spread function representing a second order partial derivative model at the present time, wherein,
Figure FDA0002226982920000022
H(R(i)j) Represents the normalized histogram in the ith window for j iterations, K (i)maxAnd K (i)minRespectively represent the maximum gray value and the minimum gray value in the ith window, Δ b represents the iteration step size, 0<Δb≤1，ωpRepresenting the tangential smoothing adjustment factor, ωqRepresenting an enhancement scale factor; deltaxAnd deltayRepresenting the forward and backward difference values, delta, of the partial derivatives, respectivelyxx、δxy、δyyRespectively, a finite difference approximation of the second partial derivative, e denotes an adjustment factor,
Figure FDA0002226982920000023
representing an image gradient vector, v representing a set edge adjustment factor, and τ representing a set gray scale influence factor;
(3) updating the iteration number j to j +1, and outputting R if the iteration number is larger than the set maximum iteration numberjAs a preprocessed license plate image; otherwise, returning to the step (2) for further processing.
2. The intelligent wireless charging device for electric vehicles according to claim 1, wherein the fee calculation system comprises: the system comprises a charge calculation module and a charge management module;
the charge calculation module is used for calculating corresponding charging charge according to the charging amount information and sending the charging charge to the background server, so that the background server deducts the corresponding charging charge from the charge balance of the license plate information;
the charge management module is used for inquiring the charge balance of the license plate information from the background server according to the received license plate information, and when the charge balance is larger than zero, a pass instruction is sent to the charge manager, so that the charge controller receives the pass instruction and then controls the external power supply to supply power to the charging coil in the wireless charging emission plate through the cable.
3. The intelligent wireless charging device for the electric automobile according to claim 1, wherein moving wheels are arranged at the bottom of the charging pile body.
4. The intelligent wireless charging device for the electric automobile according to claim 1, wherein the charging pile body is further provided with an infrared distance measuring device for monitoring and measuring the distance between the vehicle and the charging pile body and broadcasting through a broadcasting device on the charging pile body.
5. The intelligent wireless charging device for the electric automobile according to claim 1, wherein the image collector is a high-definition camera.
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