CN113511086B

CN113511086B - Safe wireless charging system and method for electric automobile

Info

Publication number: CN113511086B
Application number: CN202110875516.0A
Authority: CN
Inventors: 李平; 李鑫; 李顶占; 武宗品
Original assignee: Zhengzhou Xinda Jiean Information Technology Co Ltd
Current assignee: Zhengzhou Xinda Jiean Information Technology Co Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-04-08
Anticipated expiration: 2041-07-30
Also published as: CN113511086A

Abstract

The invention discloses a safe wireless charging system and method for an electric vehicle, wherein the system comprises a cloud server, a charging end and a vehicle end; the cloud server comprises a cloud digital watermark generating module, a digital certificate module, a cloud security module, a license plate storage module and a comparison module; the charging end comprises a camera module, a charging end short-distance direct communication module, a wireless charging transmitting module, a position measuring coil, a charging end processing module and a charging end safety module; the vehicle end comprises a battery module, a vehicle number plate module, a vehicle end short-distance direct communication module, a wireless charging receiving module, a vehicle end control module, a vehicle end safety module and a vehicle end storage module. The invention applies the digital watermarking technology to the vehicle number plate and combines the internet of vehicles technology to identify and authenticate the vehicle to be charged, so that the wireless charging of the electric vehicle is safe, reliable, simple and efficient.

Description

Safe wireless charging system and method for electric automobile

Technical Field

The invention belongs to the technical field of wireless charging of electric automobiles, and particularly relates to a safe wireless charging system and method for an electric automobile.

Background

With the rapid development and popularization of the electric automobile industry, the electric automobile and the related technology and the supporting facilities thereof are rapidly developed. Among them, the wireless charging technology based on the fixed parking space is one of the charging technologies with the most application value. The wireless charging mode does not increase the occupied area of the parking space, reduces manual operation, has the advantages of high safety, convenience and quickness, and has high commercial popularization value.

In reality, the charging parking space is illegally occupied by other vehicles, so that the legal vehicles cannot be charged, and the legal vehicles are simulated to be charged in the manners of fake plate and the like.

How to identify, authenticate and manage the vehicle to be charged by combining the digital watermarking technology and the internet of vehicles technology under the background of the great development of the current electric vehicle and wireless charging technology is an urgent problem to be solved.

Disclosure of Invention

The invention provides a safe wireless charging system and method for an electric automobile, aiming at the problem that the legal vehicle cannot be charged due to the fact that the legal vehicle is charged by fake license plates and other modes at present.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a safe wireless charging system for an electric automobile on the one hand, which comprises: the system comprises a cloud server, a charging end and a vehicle end; the cloud server is in communication connection with the charging end;

the cloud server comprises a cloud digital watermark generating module, a digital certificate module, a cloud security module, a license plate storage module and a comparison module;

the cloud digital watermark generating module is used for generating a digital watermark and embedding the digital watermark into a common vehicle license plate image to form a safe vehicle license plate image; the digital watermark comprises a first cloud digital abstract of a common vehicle license plate image, a vehicle identification code corresponding to the vehicle license plate when the vehicle license plate is registered in a vehicle management department, and a first cloud digital signature of the digital abstract and the vehicle identification code;

the digital certificate module is used for respectively generating and storing public key certificates for the cloud server, the charging end and the vehicle end, writing the public key certificates generated for the cloud server and the charging end into the charging end, and writing the public key certificates generated for the cloud server and the vehicle end into the vehicle end;

the cloud security module is used for providing a password service function and a secure storage function for the cloud server; a first safe storage area is arranged in the cloud safe module and is used for storing a private key corresponding to a public key in a public key certificate generated by the cloud server by the digital certificate module; the cryptographic service comprises generating a random number, performing digital signature operation, performing digital signature verification operation, performing encryption and decryption operation, generating a session key and generating a digital abstract;

the license plate storage module is used for presetting and storing the information of the vehicle license plate which allows the charging terminal to be used for wireless charging;

the comparison module is used for inquiring and comparing the vehicle number plate information acquired from the charging terminal with the vehicle number plate information preset and stored in the permitted number plate storage module, and if the corresponding vehicle number plate information does not exist in the permitted number plate storage module, generating and returning a vehicle charge prohibition message corresponding to the vehicle number plate to the charging terminal; if the corresponding vehicle number plate information exists in the license number plate storage module, generating and returning a preset message of the vehicle number plate to the charging terminal;

the charging end comprises a camera module, a charging end short-distance direct communication module, a wireless charging transmitting module, a position measuring coil, a charging end processing module and a charging end safety module;

the camera module is used for shooting the vehicle number plate at the vehicle end in real time to obtain a vehicle number plate image;

the charging end short-distance direct communication module is used for carrying out direct communication with the charging end in a short distance to acquire vehicle identification code information of the vehicle end;

the wireless charging transmitting module comprises a power supply control unit and a transmitting coil; the power supply control unit is used for controlling the power-on or power-off of the transmitting coil so as to start or stop wireless charging; the transmitting coil is arranged on the surface or underground of the area occupied by the charging parking place and used for converting electric energy into magnetic energy and transmitting the magnetic energy;

the position measuring coil is used for detecting the position of the vehicle end in the charging vehicle position relative to the transmitting coil, receiving an induction magnetic field generated by the vehicle end to be charged, exciting an induction voltage and transmitting an induction voltage signal to the charging end processing module;

the charging terminal processing module is used for collecting the vehicle number plate image collected by the camera module and the vehicle identification code information collected by the charging terminal short-distance direct communication module; the license plate number storage module is used for storing license plate number information of the vehicle, and is used for identifying and extracting the license plate number information from the license plate number image, and then sending the license plate number information to the cloud end for inquiring and comparing the license plate number information with the license plate number information stored in the license plate number storage module in advance; if the corresponding vehicle number plate information exists in the license number plate storage module, the cloud generates and returns a preset vehicle number plate message to the charging terminal, and then the charging terminal processing module continuously verifies whether the vehicle number plate is a legal safe vehicle number plate or not and whether the vehicle number plate is a fake plate or not based on the vehicle number plate image; when the conditions that the charging end receives a preset message of a vehicle number plate, the vehicle number plate is a safe vehicle number plate and is not a fake plate are met, the charging end wirelessly charges the vehicle end; the charging end processing module is also used for calculating and judging the position relationship between the charging end and the vehicle end according to the induced voltage signal and sending the position relationship to the vehicle end through the charging end short-distance direct communication module;

the charging terminal safety module is used for providing a password service function and a safety storage function for the charging terminal; a second safe storage area is arranged in the charging end safe module and is used for storing a public key certificate generated by the digital certificate module for the cloud server and the charging end and a private key corresponding to a public key in the public key certificate of the charging end;

the vehicle end is used for storing public key certificates generated by the digital certificate module for the cloud server and the vehicle end, private keys corresponding to public keys in the public key certificates of the vehicle end and vehicle identification codes; when the vehicle license plate information is satisfied and can be found in the license plate storage module, the vehicle license plate is the condition of safe vehicle license plate and not fake plate, the charging end carries out wireless charging.

Further, the charging end processing module is specifically configured to:

identifying and extracting vehicle number plate information from the vehicle number plate image, sending the vehicle number plate information to the cloud end for inquiring and comparing the vehicle number plate information preset and stored in the permitted number plate storage module, and if the corresponding vehicle number plate information does not exist in the permitted number plate storage module, generating and returning a vehicle number plate charge prohibition message to the charging end by the cloud end; if the corresponding vehicle number plate information exists in the license number plate storage module, the cloud generates and returns a message that the vehicle number plate is preset to the charging end;

then, continuing to try to identify the digital watermark contained in the vehicle number plate image of the vehicle end collected by the camera module; if the digital watermark identification fails, judging that the vehicle license plate corresponding to the vehicle license plate image is an illegal safe vehicle license plate, and then generating a vehicle license plate digital watermark identification failure message; if the digital watermark is successfully identified, the charging terminal processing module extracts the digital watermark information contained in the vehicle license plate image to obtain a first cloud digital abstract, the vehicle identification code and a first cloud digital signature;

then, checking the first cloud digital signature according to the first cloud digital abstract and the vehicle identification code; if the signature verification fails, judging that the vehicle number plate corresponding to the vehicle number plate image is an illegal safe vehicle number plate, and generating a first cloud digital signature verification failure message; if the verification is successful, determining that the vehicle number plate image is complete and not tampered and is a legal and safe vehicle number plate issued by the cloud server;

then, the charging terminal processing module extracts vehicle identification code information from the digital watermark, compares the vehicle identification code information with the vehicle identification code of the vehicle terminal acquired by the charging terminal short-distance direct communication module, and generates a message that the vehicle number plate identification verification is successful and the plate is not registered if the comparison is successful; and if the comparison of the vehicle identification codes is unsuccessful, generating a vehicle number plate as a fake plate message.

Further, the charging terminal also comprises a charging terminal positioning module;

the charging end positioning module is used for acquiring the geographical position information of the charging end.

Further, the charging terminal processing module collects the vehicle number plate information and the vehicle identification code information, collects geographical position information of the charging terminal and time information of the charging terminal when the charging terminal collects the information, which are obtained from the charging terminal positioning module, and sends the vehicle number plate information, the vehicle identification code information, the geographical position information of the charging terminal and the time information to the cloud server; and the cloud server depicts the geographical position and the historical driving track of the vehicle corresponding to the currently shot vehicle end at the time according to the information.

Furthermore, the vehicle end comprises a battery module, a vehicle number plate module, a vehicle end short-distance direct communication module, a wireless charging receiving module, a vehicle end control module, a vehicle end safety module and a vehicle end storage module; the vehicle end and the charging end are in communication connection through the vehicle end short-distance direct communication module and the charging end short-distance direct communication module;

the battery module is used for providing electric energy for the vehicle end;

the vehicle number plate module is used for storing vehicle number plates; the vehicle number plate consists of a common vehicle number plate and a safe vehicle number plate;

the vehicle-end short-distance direct communication module is used for carrying out short-distance direct communication with a vehicle end;

the wireless charging receiving module comprises a receiving control unit and a receiving coil; the receiving control unit is used for transmitting the electric energy transmitted by the receiving coil to the battery module and monitoring the battery electric quantity of the battery module; the receiving coil is used for receiving magnetic energy and converting the magnetic energy into electric energy;

the vehicle end control module is used for moving and/or adjusting the position of the vehicle end according to the position relation sent by the charging end processing module so as to align a transmitting coil of the wireless charging transmitting module with a receiving coil of the wireless charging receiving module to obtain the optimal electromagnetic induction charging efficiency;

the vehicle end safety module is used for providing a password service function and a safety storage function for the vehicle end; a third safe storage area is arranged in the vehicle-side safe module and used for storing public key certificates generated by the digital certificate module for the cloud server and the vehicle side and private keys corresponding to public keys in the public key certificates of the vehicle side; the vehicle identification code information is also stored;

the vehicle-end storage module is used for storing the installation position information of the receiving coil at the vehicle end.

Further, the camera module comprises a first camera, a second camera, a third camera, a vehicle number plate identification module, a vehicle number plate synthesis module, a light sensing module and a light supplementing module; the first camera is used for acquiring real-time video information of the vehicle end; the second camera and the third camera are used for photographing the vehicle number plate at the vehicle end; the vehicle license plate recognition module is used for recognizing the real-time video information collected by the first camera in real time, and calling the second camera and the third camera to photograph the safe vehicle license plate if the image information of the vehicle license plate is recognized; the vehicle license plate synthesizing module is used for calculating and synthesizing the vehicle license plate images shot by the second camera and the third camera respectively to obtain the required vehicle license plate images; the light sensing module is used for sensing the intensity of light when the second camera and the third camera take pictures and calling the light supplementing module to supplement light according to the requirement; the light supplementing module is used for supplementing light when the second camera and the third camera take photos.

The invention also provides a safe wireless charging method for the electric automobile, which comprises the following steps:

step 1, authenticating the identity of the vehicle end, driving away the vehicle corresponding to the vehicle end if the identity authentication is not passed, and then terminating the process; the method comprises the following steps: the charging terminal processing module collects the vehicle number plate image collected by the camera module and the vehicle identification code information collected by the charging terminal short-distance direct communication module; the charging terminal processing module identifies and extracts vehicle number plate information from the vehicle number plate image, and then sends the vehicle number plate information to the cloud terminal for inquiring and comparing the vehicle number plate information preset and stored in the license number plate storage module; if the corresponding vehicle number plate information exists in the license number plate storage module, the cloud generates and returns a preset vehicle number plate message to the charging terminal, and then the charging terminal processing module continuously verifies whether the vehicle number plate is a legal safe vehicle number plate or not and whether the vehicle number plate is a fake plate or not based on the vehicle number plate image;

and 2, when the conditions that the charging end receives a preset message of the vehicle number plate, and the vehicle number plate is a safe vehicle number plate and is not a fake plate are met, the charging end wirelessly charges the vehicle end.

Further, the step 1 comprises:

after the distance between the vehicle end and the charging end enters the camera shooting range of the camera module, the charging end shoots the vehicle number plate of the vehicle end in real time through the camera module to obtain a vehicle number plate image; the charging terminal obtains a vehicle identification code from the vehicle terminal through the charging terminal short-distance direct communication module, and the vehicle number plate information is sent to the cloud server through the charging terminal processing module;

after receiving the vehicle license plate image, the cloud server identifies and extracts vehicle license plate information from the vehicle license plate image, then inquires and compares the vehicle license plate information with the vehicle license plate information preset and stored in the license plate storage module, and if the corresponding vehicle license plate information does not exist in the license plate storage module, a vehicle license plate charging prohibition message is generated and returned to the charging terminal; if the license plate storage module has corresponding vehicle plate information, the cloud server generates and returns a preset vehicle plate information to the charging terminal, and then the charging terminal requests a digital watermark key from the cloud server; the cloud server encrypts the digital watermark key by using a private key of the cloud server and sends the encrypted digital watermark key to the charging terminal; the charging end decrypts by using the public key of the cloud server to obtain the digital watermark key;

the charging end processing module uses the digital watermark key to identify the digital watermark contained in the vehicle number plate image of the vehicle end collected by the camera module; if the digital watermark identification fails, the charging terminal judges that the vehicle number plate corresponding to the vehicle number plate image is an illegal safe vehicle number plate, and then generates a vehicle number plate digital watermark identification failure message; if the digital watermark is successfully identified, the charging terminal processing module extracts the digital watermark information contained in the vehicle license plate image to obtain a first cloud digital abstract, the vehicle identification code and a first cloud digital signature;

then, checking the first cloud digital signature according to the first cloud digital abstract and the vehicle identification code; if the signature verification fails, the charging terminal processing module judges that the vehicle number plate corresponding to the vehicle number plate image is an illegal safe vehicle number plate and generates a first cloud digital signature verification failure message; if the verification is successful, the charging terminal processing module judges that the vehicle number plate image is complete and is not tampered and is a legal and safe vehicle number plate issued by the cloud server; then, the charging terminal processing module extracts vehicle identification code information from the digital watermark and compares the vehicle identification code information with the vehicle identification code of the vehicle terminal acquired by the charging terminal short-distance direct communication module; if the comparison is successful, generating a message that the vehicle number plate identification verification is successful and the plate is not fake; if the comparison of the vehicle identification codes is not successful, generating a vehicle number plate as a fake plate message;

when the charging end receives the charging prohibition message of the vehicle number plate sent by the cloud server or the charging end generates the failure message of the identification of the digital watermark of the vehicle number plate, the failure message of the verification of the first cloud digital signature or the information that the vehicle number plate is a fake plate, the charging end informs the vehicle end control module to drive the vehicle corresponding to the vehicle end away from the charging end.

Further, the generation method of the safe vehicle license plate comprises the following steps:

step 11, planning and designing the image pattern of the common vehicle license plate in advance by a vehicle management department; the vehicle user submits the vehicle information of the vehicle end to be branded to a vehicle management department, selects the specific number of the vehicle license plate and registers; the vehicle information includes a vehicle identification code;

step 12, the cloud server generates a common vehicle license plate image according to the information; then, generating a first cloud digital abstract based on the common vehicle license plate image, and generating a first cloud digital signature based on the first cloud digital abstract and vehicle identification code information corresponding to the vehicle license plate when the vehicle license plate is registered in a vehicle management department;

step 13, the cloud server generates a first digital watermark by taking the first cloud digital abstract, the vehicle identification code and the first cloud digital signature as parameters, and embeds the first digital watermark into a common vehicle license plate image to generate the safe vehicle license plate image;

step 14, generating a safe vehicle number plate from the safe vehicle number plate image according to the printing and manufacturing specifications of the vehicle number plate by a vehicle management department; then, a safety vehicle number plate is installed at the vehicle end.

Further, in step 2, the wirelessly charging the vehicle end by the charging end includes:

the position measuring coil receives an induction magnetic field generated by a vehicle end to be charged, excites induction voltage and transmits the induction voltage signal to the charging end processing module;

the charging end processing module calculates and judges the position relation between a receiving coil of a wireless charging receiving module of the vehicle end and a transmitting coil of a wireless charging transmitting module of the charging end according to the induction voltage signal; the charging end processing module sends the position relation to the vehicle end control module through the charging end short-distance direct communication module;

the vehicle-end control module moves and/or adjusts the position of the vehicle end according to the position relation between the receiving coil and the transmitting coil sent by the charging-end processing module so as to align the transmitting coil and the receiving coil to obtain the optimal electromagnetic induction charging efficiency;

the power supply control unit of the wireless charging transmitting module controls the transmitting coil to be electrified so as to start charging; the transmitting coil converts electric energy into magnetic energy and transmits the magnetic energy;

a receiving coil of the wireless charging receiving module receives magnetic energy and converts the magnetic energy into electric energy; the receiving control unit transmits the electric energy transmitted by the receiving coil to the battery module so as to charge the battery module;

the receiving control unit monitors the battery capacity of the battery module; when the battery module is full of electric quantity, the receiving control unit sends a charging stopping message to the power supply control unit of the charging end; and the power supply control unit controls the transmitting coil to be powered off after receiving the charging stopping message.

Compared with the prior art, the invention has the following beneficial effects:

the digital watermark information is embedded into the vehicle license plate image so as to generate the safe vehicle license plate, wherein the digital watermark information comprises abstract information of the image of the common vehicle license plate, a vehicle identification code corresponding to the vehicle license plate when the vehicle license plate is registered in a vehicle management department and signature information obtained after the digital abstract and the vehicle identification code are digitally signed by a cloud server. Through the verification of the abstract information of the vehicle license plate image and the signature information of the vehicle identification code, whether the image content of the safe vehicle license plate is complete or not and whether the image content is tampered or not can be determined, and whether the image content is issued by the cloud server or not can be confirmed. The problem of harm of fake plate and the like caused by illegal altering, tampering and/or copying of the vehicle license plate image is solved from the source, because once the safe vehicle license plate image is illegally altered, tampered and/or copied, the illegal operations can be verified; furthermore, the vehicle identification code information contained in the digital watermark is compared with the vehicle identification code information which is arranged in a factory and can only be read by a vehicle user when the vehicle leaves the factory, so that whether the vehicle license plate is a fake plate vehicle or not can be determined; therefore, the illegal license plate or the fake-licensed vehicle can be identified, so that the vehicles can be driven away, and the wireless charging of the invention can be carried out by preventing the vehicles with illegal license plates or fake-licensed vehicles from imitating legal vehicles. The invention also plays a role in preventing the non-permitted vehicles from being charged through presetting the permitted vehicle number plate information.

When the verification result of the vehicle license plate identification verification or the comparison result of the vehicle identification code information is in a problem, the vehicle management department can be informed to check whether the integrity of the safe vehicle license plate is damaged, tampered and forged and/or check the fake license plate behavior of the vehicle license plate.

According to the invention, when the charging end and the cloud server communicate with each other, the communication information of the two parties is signed and verified, so that the integrity of the information and the authenticity of the identity of the sender in the communication process of the two parties are ensured.

In summary, the safe wireless charging system and method for the electric vehicle provided by the invention effectively overcome the defects of the prior art by applying the digital watermarking technology to the vehicle number plate and combining the vehicle networking technology with the identity recognition and authentication of the vehicle to be charged, so that the wireless charging of the electric vehicle is safe, reliable, simple and efficient.

Drawings

Fig. 1 is a schematic diagram of a secure wireless charging system for an electric vehicle according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a process of generating a safe vehicle number plate of a safe wireless charging system for an electric vehicle according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating a digital watermark extraction process of a secure wireless charging system for an electric vehicle according to an embodiment of the present invention;

fig. 4 is a second schematic structural diagram of a safe wireless charging system for an electric vehicle according to a second embodiment of the present invention.

Detailed Description

For ease of understanding, some of the terms appearing in the present invention are explained below:

the vehicle number plate, commonly called license plate and license plate, is a plate material respectively hung in front of and behind the vehicle, and the commonly used material is aluminum, iron sheet, plastic or paper, on which the registration number, registration area or other relevant information of the vehicle is engraved;

the Vehicle Identification Number (or called frame Number, abbreviated as VIN) is a group consisting of a plurality of letters and/or numbers, is used for a group of unique numbers on the automobile, and can identify the manufacturer, the engine, the chassis serial Number, other performance data and the like of the automobile;

the invention is further illustrated by the following examples in conjunction with the accompanying drawings:

as shown in fig. 1, in one aspect, the present invention provides a safe wireless charging system for an electric vehicle, including: the system comprises a cloud server, a charging end and a vehicle end; the cloud server is in communication connection with the charging end;

the cloud digital watermark generating module is used for generating a digital watermark and embedding the digital watermark into a common vehicle license plate image to form a safe vehicle license plate image, as shown in fig. 2; the digital watermark comprises a first cloud digital abstract of a common vehicle license plate image, a vehicle identification code corresponding to the vehicle license plate when the vehicle license plate is registered in a vehicle management department, and a first cloud digital signature of the digital abstract and the vehicle identification code; the vehicle management department refers to a public security traffic management department, and a specific responsible department takes the provisions of corresponding laws and regulations as the standard;

the digital certificate module is respectively used for generating and storing public key certificates for the cloud server and the charging terminal; the digital certificate module writes the public key certificate of the charging terminal and the public key certificate of the cloud server into the charging terminal security module in an off-line or on-line mode; the cloud server and the charging terminal respectively store private keys corresponding to public keys in corresponding public key certificates; the private key of the cloud server is stored in the digital certificate module or the safe storage area of the cloud security module; the private key of the charging terminal is stored in the safe storage area of the charging terminal safety module; further, the digital certificate module can also generate and store a public key certificate for the vehicle end; the digital certificate module writes the public key certificate of the vehicle end and the public key certificate of the cloud server into the vehicle end safety module in an off-line or on-line mode; the vehicle end stores a private key corresponding to a public key in a corresponding public key certificate; the private key of the vehicle end is stored in the safe storage area of the vehicle end safety module; the vehicle end also has the capability of carrying out safe encrypted communication with the cloud server; the digital certificate module also maintains a certificate revocation list and provides a certificate revocation list query function;

the license plate storage module is used for presetting and storing the information of the vehicle license plate which allows the charging terminal to be used for wireless charging; specifically, before wirelessly charging a vehicle end, vehicle number plate information of the vehicle end allowed to be charged is firstly input into the license number plate storage module;

the wireless charging transmitting module comprises a power supply control unit and a transmitting coil; the power supply control unit is used for controlling the power-on or power-off of the transmitting coil so as to start or stop wireless charging; the transmitting coil is arranged on the surface or underground of the area occupied by the charging parking place and used for converting electric energy into magnetic energy and transmitting the magnetic energy; the charging parking space is the position where the vehicle end is parked when the charging end is charged;

the position measuring coil is used for detecting the position of the vehicle end in the charging vehicle position relative to the transmitting coil, receiving an induction magnetic field generated by the vehicle end to be charged, exciting an induction voltage and transmitting an induction voltage signal to the charging end processing module; specifically, the position measurement coil is one or more; preferably, the position measurement coils may be distributed at the center and/or the periphery of the transmitting coil;

the charging terminal processing module is used for collecting the vehicle number plate image collected by the camera module and the vehicle identification code information collected by the charging terminal short-distance direct communication module; the license plate number storage module is used for storing license plate number information of the vehicle, and is used for identifying and extracting the license plate number information from the license plate number image, and then sending the license plate number information to the cloud end for inquiring and comparing the license plate number information with the license plate number information stored in the license plate number storage module in advance; if the corresponding vehicle number plate information exists in the license number plate storage module, the cloud generates and returns a preset vehicle number plate message to the charging terminal, and then the charging terminal processing module continuously verifies whether the vehicle number plate is a legal safe vehicle number plate or not and whether the vehicle number plate is a fake plate or not based on the vehicle number plate image; when the conditions that the charging end receives a preset message of a vehicle number plate, the vehicle number plate is a safe vehicle number plate and is not a fake plate are met, the charging end wirelessly charges the vehicle end; the charging end processing module is also used for calculating and judging the position relationship between the charging end and the vehicle end according to the induced voltage signal and sending the position relationship to the vehicle end through the charging end short-distance direct communication module; the vehicle end control module of the vehicle end moves and/or adjusts the position of the vehicle end according to the position relation so as to align the transmitting coil and the receiving coil to obtain the optimal electromagnetic induction charging efficiency; preferably, the charging end processing module can further obtain specific installation position information of a receiving coil of the wireless charging receiving module of the vehicle end on a chassis from the vehicle end storage module of the vehicle end through the charging end short-distance direct communication module, so as to calculate a relative position of the receiving coil and the transmitting coil;

Further, the charging end processing module is specifically configured to:

then, continuing to attempt to identify the digital watermark contained in the vehicle number plate image of the vehicle end collected by the camera module, as shown in fig. 3; if the digital watermark identification fails, judging that the vehicle license plate corresponding to the vehicle license plate image is an illegal safe vehicle license plate, and then generating a vehicle license plate digital watermark identification failure message; if the digital watermark is successfully identified, the charging terminal processing module extracts the digital watermark information contained in the vehicle license plate image to obtain a first cloud digital abstract, the vehicle identification code and a first cloud digital signature;

Further, as shown in fig. 4, the charging terminal further includes a charging terminal positioning module;

Further, the charging terminal processing module collects the vehicle number plate information of the vehicle terminal collected by the camera module and the vehicle identification code information of the vehicle terminal collected by the charging terminal short-distance direct communication module, and also collects the geographic position information of the charging terminal and the time information of the charging terminal when collecting the information, which are obtained from the charging terminal positioning module, and sends the vehicle number plate information, the vehicle identification code information, the geographic position information of the charging terminal and the time information to the cloud server; the cloud server can depict the geographic position, the historical driving track and the like of the vehicle represented by the currently shot vehicle end at the time according to the vehicle number plate information, the vehicle identification code information, the geographic position information of the charging end and the time information, so that the functions of vehicle positioning, vehicle tracking, vehicle management and the like can be conveniently realized.

the battery module is used for providing electric energy for the vehicle end;

the vehicle number plate module is used for storing vehicle number plates; the vehicle number plate consists of a common vehicle number plate and a safe vehicle number plate; the common vehicle number plate comprises one or more of a large-scale vehicle number plate, a small-scale vehicle number plate, an embassy vehicle number plate, a guinance vehicle number plate, a hong Kong-Macao vehicle number plate, a coach vehicle number plate, a police vehicle number plate and a temporary driving number plate; the safe vehicle license plate is a vehicle license plate generated after the digital watermark is embedded in a common vehicle license plate;

the wireless charging receiving module comprises a receiving control unit and a receiving coil; the receiving control unit is used for transmitting the electric energy transmitted by the receiving coil to the battery module so as to charge the battery module; the receiving coil is used for receiving magnetic energy and converting the magnetic energy into electric energy; the receiving coil is arranged below a chassis of the vehicle end; the receiving control unit is also used for monitoring the battery electric quantity of the battery module; when the battery module is full of electric quantity, the receiving control unit sends a charging stopping message to the power supply control unit of the charging end; the power supply control unit controls the transmitting coil to be powered off after receiving the charging stopping message;

the vehicle end control module is used for moving and/or adjusting the position of the vehicle end according to the position relation sent by the charging end processing module so as to align a transmitting coil of the wireless charging transmitting module with a receiving coil of the wireless charging receiving module to obtain the optimal electromagnetic induction charging efficiency; further, the moving and/or adjusting of the position of the vehicle end by the vehicle end control module may specifically be the moving and/or adjusting of the position of the vehicle end by the vehicle end control module controlling the vehicle end in an automatic driving manner, or may be the sending or displaying of the position relationship on a central control instrument in the vehicle by the vehicle end control module, and then the moving and/or adjusting of the position of the vehicle end by the driver controlling the vehicle end;

the vehicle end safety module is used for providing a password service function and a safety storage function for the vehicle end; a third safe storage area is arranged in the vehicle-side safe module and used for storing public key certificates generated by the digital certificate module for the cloud server and the vehicle side and private keys corresponding to public keys in the public key certificates of the vehicle side; the vehicle identification code information is also stored; specifically, the vehicle identification code is arranged in a third safety storage area of the vehicle end safety module of the vehicle end before the vehicle leaves a factory by a vehicle production party, and after the vehicle identification code is arranged in the third safety storage area of the vehicle end safety module, only a read-only function is provided, so that the vehicle user cannot change the vehicle identification code arranged in the third safety storage area of the vehicle end safety module;

Preferably, the cloud security module, the charging terminal security module and the vehicle terminal security module are all security intelligent chips, and the commercial cryptographic algorithms supported by the security intelligent chips include but are not limited to one or more of SM1, SM2, SM3, SM4 and SM9, and the supported international common cryptographic algorithms include but are not limited to one or more of 3DES, AES, RSA, SHA-1 and SHA-256; the secure intelligent chip supports storing a digital certificate; the safety intelligent chip provides a safety storage area and supports the safety storage of important information; the secure smart chip supports generation of random numbers.

Preferably, the charging end short-distance direct communication module and the vehicle end short-distance direct communication module are both C-V2X PC5 short-distance direct communication modules, and the charging end short-distance direct communication module and the vehicle end short-distance direct communication module are in communication connection within the communication range of the C-V2X PC5 short-distance direct communication interface. C in the C-V2X refers to Cellular (Cellular), the C-V2X is a vehicle wireless communication technology formed by evolution of Cellular communication technologies such as 3G/4G/5G, and the like, and comprises two communication interfaces: one is a short-distance direct communication interface (PC 5) between vehicles, people and roads, and the other is a communication interface (Uu) between a terminal and a base station, which can realize reliable communication in a long distance and a wider range. C-V2X is a communication technology based on the 3GPP Global unified Standard, including LTE-V2X and 5G-V2X, and from the technical evolution perspective, LTE-V2X supports a smooth evolution to 5G-V2X.

Preferably, the first camera adopts an ultra-high-definition camera or a full-high-definition camera, has a resolution of 1080P (1920 x 1080) or above, is mainly used for shooting videos in a driving process, and is provided for the vehicle license plate identification module to identify the vehicle license plate; the first camera can also adopt a binocular camera; the second camera and the third camera adopt ultra-high resolution lenses (such as 4500 ten thousand pixels and more) and are used for shooting pictures of the vehicle license plate and generating image information of the vehicle license plate.

On the basis of the above embodiments, another aspect of the present invention further provides a safe wireless charging method for an electric vehicle, including:

Further, the step 1 of authenticating the identity of the vehicle end refers to identifying and verifying whether the information of the vehicle number plate of the vehicle end is preset and stored in the license number plate storage module, whether the vehicle number plate of the vehicle end is a safe vehicle number plate, and whether the vehicle number plate is a fake plate, so as to ensure that the vehicle number plate of the vehicle end to be charged is a license number plate which is permitted to be charged, the vehicle number plate is real, and the vehicle number plate is not a vehicle number plate which applies license plates of other vehicles to imitate the identity of license plates of other vehicles; the step 1 specifically comprises:

after the distance between the vehicle end and the charging end enters the camera shooting range of the camera module, the charging end shoots the vehicle number plate of the vehicle end in real time through the camera module to obtain a vehicle number plate image; the charging terminal obtains a vehicle identification code from the vehicle terminal through the charging terminal short-distance direct communication module; the vehicle license plates are divided into a common vehicle license plate and a safety vehicle license plate, and the safety vehicle license plate is the vehicle license plate with digital watermarks embedded in the common vehicle license plate; the digital watermark comprises a first cloud digital abstract of a common vehicle license plate image, a vehicle identification code corresponding to the vehicle license plate when the vehicle license plate is registered in a vehicle management department, and a first cloud digital signature of the digital abstract and the vehicle identification code;

the charging end processing module extracts vehicle number plate information from the vehicle number plate image in a recognition mode, then sends the vehicle number plate information to the cloud end for the cloud end to inquire and compare with the vehicle number plate information preset and stored in the permitted number plate storage module, and if the corresponding vehicle number plate information does not exist in the permitted number plate storage module, the cloud end generates and returns a vehicle number plate charging prohibition message to the charging end; if the corresponding vehicle number plate information exists in the license number plate storage module, the cloud terminal generates and returns a preset vehicle number plate message to the charging terminal, and then the charging terminal requests a digital watermark key from the cloud terminal server; the cloud server encrypts the digital watermark key by using a private key of the cloud server and sends the encrypted digital watermark key to the charging terminal; the charging end decrypts by using the public key of the cloud server to obtain the digital watermark key;

the charging terminal processing module uses the digital watermark key to try to identify the digital watermark contained in the vehicle number plate image of the vehicle terminal collected by the camera module; if the digital watermark identification fails, the charging terminal judges that the vehicle number plate corresponding to the vehicle number plate image is an illegal safe vehicle number plate, and then generates a vehicle number plate digital watermark identification failure message; specifically, if the digital watermark information is failed to be identified, it is indicated that the image of the vehicle license plate does not contain the digital watermark information or the digital watermark information is damaged and cannot be identified; if the digital watermark is successfully identified, the charging terminal processing module extracts the digital watermark information contained in the vehicle license plate image to obtain a first cloud digital abstract, the vehicle identification code and a first cloud digital signature;

when the charging end receives the charging prohibition message of the vehicle number plate sent by the cloud server or the charging end generates the failure message of the identification of the digital watermark of the vehicle number plate, the failure message of the verification of the first cloud digital signature or the information that the vehicle number plate is a fake plate, the charging end informs a vehicle end control module of the vehicle end to drive the vehicle end away from the charging end; specifically, the driving of the vehicle end from the charging end by the vehicle end control module of the vehicle end may be that the vehicle end is controlled by the vehicle end control module to drive the vehicle end from the charging end in an automatic driving manner, or that the driving information is sent or displayed on a central control instrument in the vehicle by the vehicle end control module, and then the vehicle end is controlled by a human driver to drive the vehicle end from the charging end.

Further, after the charging terminal generates the vehicle number plate digital watermark identification failure message or the first cloud digital signature verification failure message, the charging terminal informs a vehicle management department of checking whether the integrity of the vehicle number plate at the vehicle terminal is damaged, whether the vehicle number plate is falsified, falsified and imitated or whether the vehicle number plate is a safe vehicle number plate issued by the vehicle management department; and after the charging end generates a message that the vehicle number plate is a fake plate, the charging end informs a vehicle management department to check and process the corresponding vehicle end.

Further, the charging end still will vehicle number plate image, vehicle identification code with correspond by the charging end generates vehicle number plate digital watermark discernment failure message, first high in the clouds digital signature verification failure message or vehicle number plate is fake plate message routing to the high in the clouds server, so that the high in the clouds server carries out comprehensive record, statistics and/or analysis and research and judge to the condition of corresponding vehicle end and vehicle number plate, and notifies the traffic control department to take corresponding measure, corresponding measure includes but not limited to the illegal fake.

Further, the corresponding vehicle number plate digital watermark identification failure message, the first cloud digital signature verification failure message or the vehicle number plate fake plate message generated by the charging terminal is collectively called a charging terminal return cloud terminal message; before the charging end sends the vehicle number plate image, the vehicle identification code and the corresponding charging end return cloud end message to the cloud end server, signing the vehicle number plate image, the vehicle identification code and the corresponding charging end return cloud end message to obtain a first charging end digital signature; then, the charging terminal sends the vehicle number plate image, the vehicle identification code, a corresponding charging terminal return cloud end message and the first charging terminal digital signature to the cloud end server;

after the cloud server receives the information, the cloud server checks the first charging end digital signature based on the received vehicle number plate image, the vehicle identification code and the corresponding charging end returned cloud information, if the first charging end digital signature check fails, the cloud server returns a first charging end digital signature verification failure message to the charging end, and if the first charging end digital signature check succeeds, the vehicle number plate image, the vehicle identification code and the corresponding charging end returned cloud information sent by the charging end are judged to be complete and not tampered, and the identity of the charging end is real.

Further, before the vehicle fake-license detection is carried out based on the safe vehicle number plate, the safe vehicle number plate is generated and installed at the vehicle end; before installing a safe vehicle number plate at a vehicle end, submitting vehicle information of the vehicle end to a vehicle management department and registering; the vehicle information includes, but is not limited to, a vehicle identification code; the specific generation method of the safe vehicle license plate comprises the following steps:

step 11, planning and designing the image pattern of the common vehicle license plate in advance by a vehicle management department; the vehicle user submits the vehicle information of the vehicle end to be branded to a vehicle management department, selects the specific number of the vehicle license plate and registers; the vehicle information includes a vehicle identification code; the vehicle management department refers to a public security traffic management department, and a specific responsible department takes the provisions of corresponding laws and regulations as the standard;

step 12, the cloud server generates a common vehicle license plate image according to the information; then, generating a first cloud digital abstract based on the common vehicle license plate image, and then generating a first cloud digital signature based on the first cloud digital abstract and vehicle identification code information corresponding to the vehicle license plate when the vehicle license plate is registered in a vehicle management department; the cloud server generates a digital watermark key; the digital watermark key is used as a parameter when the digital watermark is inserted and extracted;

step 13, the cloud server takes the first cloud digital abstract, the vehicle identification code and the first cloud digital signature as parameters to generate a first digital watermark, and then embeds the first digital watermark into a common vehicle license plate image by combining the digital watermark key to generate the safe vehicle license plate image;

step 14, generating a safe vehicle number plate from the safe vehicle number plate image according to the printing and manufacturing specifications of the vehicle number plate by a vehicle management department; then, a safety vehicle number plate is installed on the vehicle end.

the position measuring coil receives an induction magnetic field generated by a vehicle end to be charged, excites induction voltage and transmits the induction voltage signal to the charging end processing module; the position measuring coil is one or more; preferably, the position measurement coils may be distributed at the center and/or the periphery of the transmitting coil;

the charging end processing module calculates and judges the position relation between a receiving coil of a wireless charging receiving module of the vehicle end and a transmitting coil of a wireless charging transmitting module of the charging end according to the induction voltage signal; the charging end processing module sends the position relation to the vehicle end through the charging end short-distance direct communication module; preferably, the charging end processing module can further obtain specific installation position information of a receiving coil of the wireless charging receiving module of the vehicle end on a chassis from the vehicle end storage module of the vehicle end through the charging end short-distance direct communication module, so as to calculate a relative position of the receiving coil and the transmitting coil;

the vehicle-end control module moves and/or adjusts the position of the vehicle end according to the position relation between the receiving coil and the transmitting coil sent by the charging-end processing module so as to align the transmitting coil and the receiving coil to obtain the optimal electromagnetic induction charging efficiency; further, the moving and/or adjusting of the position of the vehicle end by the vehicle end control module may specifically be the moving and/or adjusting of the position of the vehicle end by the vehicle end control module controlling the vehicle end in an automatic driving manner, or may be the sending or displaying of the position relationship on a central control instrument in the vehicle by the vehicle end control module, and then the moving and/or adjusting of the position of the vehicle end by the human driver controlling the vehicle end;

the power supply control unit of the wireless charging transmitting module of the charging end controls the transmitting coil to be electrified so as to start charging; the transmitting coil converts electric energy into magnetic energy and transmits the magnetic energy; the transmitting coil is arranged on the surface or underground of the area occupied by the charging parking place; the charging parking space is the position where the vehicle end is parked when the charging end is charged;

a receiving coil of the wireless charging receiving module at the vehicle end receives magnetic energy and converts the magnetic energy into electric energy; the receiving coil is arranged below a chassis of the vehicle end; the receiving control unit is used for transmitting the electric energy transmitted by the receiving coil to the battery module so as to charge the battery module;

The above shows only the preferred embodiments of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a safe wireless charging system of electric automobile which characterized in that includes: the system comprises a cloud server, a charging end and a vehicle end; the cloud server is in communication connection with the charging end;

2. The safe wireless charging system for electric vehicles according to claim 1, wherein the charging terminal processing module is specifically configured to:

3. The safe wireless charging system for electric vehicles according to claim 1, wherein the charging terminal further comprises a charging terminal positioning module;

4. The system of claim 3, wherein the charging terminal processing module collects the vehicle number plate information and the vehicle identification code information, and also collects the geographic location information of the charging terminal and the time information of the charging terminal when the charging terminal collects the information, and sends the vehicle number plate information, the vehicle identification code information, the geographic location information of the charging terminal and the time information to the cloud server; and the cloud server depicts the geographical position and the historical driving track of the vehicle corresponding to the currently shot vehicle end at the time according to the information.

5. The safe wireless charging system for the electric automobile according to claim 1, wherein the automobile end comprises a battery module, an automobile number plate module, an automobile end short-distance direct communication module, a wireless charging receiving module, an automobile end control module, an automobile end safety module and an automobile end storage module; the vehicle end and the charging end are in communication connection through the vehicle end short-distance direct communication module and the charging end short-distance direct communication module;

the battery module is used for providing electric energy for the vehicle end;

6. The safe wireless charging system for the electric automobile according to claim 1, wherein the camera module comprises a first camera, a second camera, a third camera, a vehicle number plate identification module, a vehicle number plate synthesis module, a light sensing module and a light supplementing module; the first camera is used for acquiring real-time video information of the vehicle end; the second camera and the third camera are used for photographing the vehicle number plate at the vehicle end; the vehicle license plate recognition module is used for recognizing the real-time video information collected by the first camera in real time, and calling the second camera and the third camera to photograph the safe vehicle license plate if the image information of the vehicle license plate is recognized; the vehicle license plate synthesizing module is used for calculating and synthesizing the vehicle license plate images shot by the second camera and the third camera respectively to obtain the required vehicle license plate images; the light sensing module is used for sensing the intensity of light when the second camera and the third camera take pictures and calling the light supplementing module to supplement light according to the requirement; the light supplementing module is used for supplementing light when the second camera and the third camera take photos.

7. A safe wireless charging method for an electric vehicle based on the safe wireless charging system for an electric vehicle as claimed in any one of claims 1 to 6, comprising:

8. The safe wireless charging method for the electric automobile according to claim 7, wherein the step 1 comprises:

9. The safe wireless charging method for the electric automobile according to claim 7, wherein the safe vehicle number plate is generated by the method comprising the following steps:

10. The safe wireless charging method for the electric vehicle according to claim 7, wherein in the step 2, the wirelessly charging the vehicle end by the charging end comprises: