CN110450660B

CN110450660B - Wireless charging automatic matching method and system

Info

Publication number: CN110450660B
Application number: CN201910768695.0A
Authority: CN
Inventors: 褚维戈; 王静
Original assignee: Ztev Corp
Current assignee: Ztev Corp
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2023-01-31
Anticipated expiration: 2039-08-20
Also published as: CN110450660A

Abstract

The invention discloses a wireless charging automatic matching method and a system, comprising the following steps: the vehicle-mounted equipment sends a request message for distributing the wireless charging equipment to a background system, wherein the request message carries a frequency list and/or a time sequence list of wireless signals which are supported and received by the vehicle-mounted equipment, and position information of the current vehicle-mounted equipment; the background system negotiates a designated frequency and/or a designated time sequence supported by the vehicle-mounted equipment and the ground equipment according to a request message for distributing the wireless charging equipment, which is sent by the vehicle-mounted equipment; the ground device transmitting a beacon signal using the specified frequency and/or timing; the in-vehicle device receives the beacon signal transmitted at the specified frequency and/or timing using the specified frequency and/or timing. According to the embodiment of the invention, when the vehicle approaches the wireless charging parking space, the frequency and the time sequence of the beacon signals transmitted by the vehicle-mounted equipment and the ground equipment are automatically negotiated, so that the vehicle-mounted equipment can receive the beacon signals transmitted by the ground equipment, and the guiding and positioning of the vehicle-mounted equipment are realized.

Description

Wireless charging automatic matching method and system

Technical Field

The invention relates to the field of wireless charging, in particular to a wireless charging automatic matching method and system.

Background

Wireless charging is a new charging technology that has emerged in recent years, and charging within a certain space range can be realized without the help of a charging wire. The implementation method is mainly based on Wireless Power Transfer (WPT) technology, electric energy is transmitted to an electric equipment end from a Power supply end in a non-contact mode by using principles of magnetic resonance coupling, laser, microwave and the like, wireless charging/Power supply of the electric equipment can be achieved, and the Wireless Power transmission system has the advantages of safety, reliability, flexibility, convenience, environmental friendliness, all-weather working and the like, and therefore the Wireless Power transmission system is widely concerned in recent years.

In practical application, in order to ensure that the charger works in an optimal state and the efficiency consistency of each charging is ensured, the wireless charging system must have a parking guidance function, and can ensure that the distance from the vehicle to an ideal parking point is within an allowable deviation range defined by the wireless charging system. And the number of the first and second electrodes,

when parking guidance is carried out, a beacon is transmitted through a transmitting antenna arranged on a primary charging coil to carry out vehicle positioning. It is therefore necessary that the frequencies of the transmit and receive antennas remain the same to receive the correct beacon signal. When a plurality of wireless charging parking spaces exist in a parking lot, the transmitting antenna of the ground equipment of each wireless charging parking space is required to transmit positioning beacon signals with different frequencies, a vehicle to be charged can only charge the wireless charging parking space with corresponding frequencies, if the wireless charging parking space is used by other vehicles, the wireless charging device of other parking spaces cannot be used for charging, and because the frequencies of the beacon signals transmitted by the transmitting antennas of the ground equipment of other parking spaces are not matched with the frequencies of the receiving antennas of the vehicle-mounted equipment, the corresponding beacon signals cannot be received, so that guiding and positioning cannot be carried out.

Therefore, it is necessary to provide an automatic wireless charging matching method to solve the problem that the frequency of the beacon signal transmitted by the transmitting antenna of the ground device is not matched with the frequency of the receiving antenna of the vehicle-mounted device during wireless charging, so that the corresponding beacon signal cannot be received and the guiding and positioning cannot be performed.

In order to solve the above problems, the present invention provides a guiding and positioning automatic matching device, system and method for a wireless charging system, wherein the method is used to automatically negotiate the frequency and timing sequence of a vehicle-mounted receiving antenna and a positioning beacon antenna emitted by a primary charging coil when the charging level is close to the charging level, so as to ensure that the wireless charging vehicle-mounted receiving antenna can receive a beacon signal emitted by the positioning beacon antenna emitted by the primary charging coil, thereby implementing a vehicle-mounted positioning function.

Disclosure of Invention

In view of this, embodiments of the present invention provide an automatic matching method and system for wireless charging, which can solve the problem that the frequency of a beacon signal sent by a transmitting antenna of a ground device is not matched with the frequency of a receiving antenna of a vehicle-mounted device during wireless charging, so that a corresponding beacon signal cannot be received and guidance positioning cannot be performed.

The technical scheme adopted by the invention for solving the technical problems is as follows:

according to one aspect of the embodiment of the invention, the provided wireless charging automatic matching method is applied to a wireless charging automatic matching system, and the system comprises: the system comprises vehicle-mounted equipment, ground equipment and a background system; the background system is installed in the server and is respectively connected with the vehicle-mounted equipment and the ground equipment through a wireless network; the method comprises the following steps:

the vehicle-mounted equipment sends a request message for distributing wireless charging equipment to the background system, wherein the request message carries a frequency list and/or a time list of wireless signals supported and received by the vehicle-mounted equipment, and position information of the current vehicle-mounted equipment;

the background system negotiates a designated frequency and/or a designated time sequence supported by the vehicle-mounted equipment and the ground equipment according to the request message for allocating the wireless charging equipment;

the ground equipment transmits a beacon signal using the specified frequency and/or timing;

and the vehicle-mounted equipment receives the beacon signals transmitted by the specified frequency and/or time sequence by using the specified frequency and/or time sequence.

In one possible design, the list of wireless signal frequencies includes low frequency bands that the in-vehicle device supports receiving; the position information of the vehicle-mounted equipment is acquired through at least one of the following ways: position information acquired by GPS, position information acquired by network positioning and position information selected by a user.

In one possible design, the wireless network includes at least one of: 2G, 4G, 5G, WIFI.

In a possible design, the background system negotiates a specified frequency and/or time sequence supported by both the vehicle-mounted device and the ground device according to the request message for allocating the wireless charging device; the method comprises the following steps:

receiving the distribution wireless charging device request message;

acquiring a wireless signal frequency list and/or a time list and position information which are supported and received by the vehicle-mounted equipment from the request message for allocating the wireless charging equipment;

matching the radio signal frequency list and/or the time sequence list which is supported and received by the vehicle-mounted equipment with the obtained radio signal frequency list and/or the obtained time sequence list which is supported and transmitted by the ground equipment, and negotiating a specified frequency and/or a specified time sequence which are supported by the vehicle-mounted equipment and the ground equipment for communication;

and sending a beacon request message for starting the designated frequency to the acquired ground equipment, wherein the beacon request message for starting the designated frequency to send the beacon carries the designated frequency and/or the timing sequence.

In one possible design, the ground device transmits a beacon signal using the specified frequency and/or timing; the method comprises the following steps:

the ground equipment receives the beacon request message sent by the starting designated frequency;

transmitting a beacon signal by using the appointed frequency and/or the time sequence carried in the beacon request message sent by the appointed frequency starting;

and returning a beacon response message sent by starting the designated frequency to the background system, wherein the beacon response message sent by starting the designated frequency carries a success identifier or a failure identifier.

In one possible design, before the in-vehicle device receives the beacon signal transmitted by the specified frequency and/or timing by using the specified frequency and/or timing, the method further includes:

the background system receives the beacon response message sent by the starting designated frequency;

sending a response message of the distributed wireless charging equipment to the vehicle-mounted equipment according to a success identifier carried in the beacon response message sent by the starting designated frequency, wherein the response message of the distributed wireless charging equipment carries the designated frequency and/or the timing sequence and the ground equipment information; wherein the ground equipment information at least comprises one of the following information: ground equipment position information and ground equipment model information.

In one possible design, the in-vehicle device receives a beacon signal transmitted by the specified frequency and/or timing using the specified frequency and/or timing, and includes:

the vehicle-mounted equipment receives a response message of the distributed wireless charging equipment;

and using the designated wireless frequency and/or timing setting receiving antenna carried in the distribution charging equipment response message to receive the beacon signal of the designated wireless frequency and/or timing.

In one possible design, the in-vehicle device receives a beacon signal transmitted by the specified frequency and/or timing using the specified frequency and/or timing, and further includes:

transmitting the ground equipment position information carried in the response message of the distributed wireless charging equipment to a main control module of the vehicle-mounted equipment;

and the vehicle-mounted equipment main control module guides a vehicle to navigate nearby the position of the ground equipment according to the position information of the ground equipment.

In one possible design, the method further includes:

the vehicle-mounted equipment receives the beacon signals transmitted by the ground equipment by using the specified frequency and/or time sequence;

and performing positioning processing by using the beacon signal to obtain positioning information of the vehicle-mounted equipment, wherein the positioning information comprises the current distance between the vehicle-mounted equipment and the ground equipment and the rotation angle of a vehicle coordinate system where the vehicle-mounted equipment is located relative to the ground coordinate system where the ground equipment is located.

According to an aspect of an embodiment of the present invention, there is provided a wireless charging automatic matching system, including: the system comprises vehicle-mounted equipment, ground equipment and a background system; the background system is installed in the server and is respectively connected with the vehicle-mounted equipment and the ground equipment through a wireless network; wherein:

the vehicle-mounted equipment is used for sending a request message for distributing the wireless charging equipment to the background system, wherein the request message carries a frequency list and/or a time list of wireless signals which are supported and received by the vehicle-mounted equipment, and position information of the current vehicle-mounted equipment;

the background system is used for negotiating a designated frequency and/or time sequence supported by the vehicle-mounted equipment and the ground equipment according to the request message for allocating the wireless charging equipment;

the ground equipment is used for transmitting a beacon signal by using the specified frequency and/or time sequence;

the vehicle-mounted equipment is also used for receiving the beacon signals transmitted by the specified frequency and/or the specified time sequence by using the specified frequency and/or the specified time sequence.

Compared with the related art, the embodiment of the invention provides a wireless charging automatic matching method and a wireless charging automatic matching system, which comprise the following steps: the vehicle-mounted equipment sends a request message for distributing the wireless charging equipment to a background system, wherein the request message carries a frequency list and/or a time sequence list of wireless signals which are supported and received by the vehicle-mounted equipment, and position information of the current vehicle-mounted equipment; the background system negotiates a designated frequency and/or time sequence supported by the vehicle-mounted equipment and the ground equipment according to a request message for distributing the wireless charging equipment, which is sent by the vehicle-mounted equipment; the ground device transmitting a beacon signal using the specified frequency and/or timing; the in-vehicle device receives the beacon signal transmitted at the specified frequency and/or timing using the specified frequency and/or timing. By the embodiment of the invention, when a vehicle approaches the wireless charging parking space, the frequency and the time sequence of the beacon signals transmitted by the receiving antenna of the vehicle-mounted equipment and the transmitting antenna of the ground equipment can be automatically negotiated, so that the receiving antenna of the wireless charging vehicle-mounted equipment can receive the beacon signals transmitted by the transmitting antenna of the ground equipment and used for guiding and positioning, and the guiding and positioning functions of the vehicle-mounted equipment are realized. The problem of wireless charging thereby can't guide the location because the frequency of the beacon signal that ground equipment transmitting antenna sent and the frequency of on-vehicle equipment's receiving antenna mismatch, lead to unable received corresponding beacon signal is solved.

Drawings

Fig. 1 is a schematic flowchart of an automatic wireless charging matching method according to an embodiment of the present invention;

fig. 2 is a schematic view of a rotation angle of an on-board device relative to a ground device in a wireless charging positioning calibration method according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a wireless charging automatic matching system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a ground device in a wireless charging automatic matching system according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a ground device in a wireless charging automatic matching system according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a vehicle-mounted device in a wireless charging automatic matching system according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an on-vehicle device in a wireless charging automatic matching system according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a beacon signal transmitted by a transmitting antenna in a wireless charging automatic matching system according to an embodiment of the present invention;

fig. 9 is a schematic diagram illustrating center coincidence of a ground device and a vehicle-mounted device in a wireless charging automatic matching system according to an embodiment of the present invention;

fig. 10 is a schematic flow chart illustrating a process of selecting a plurality of actual measurement points for marking RSSI in the wireless charging automatic matching method according to the embodiment of the present invention;

fig. 11 is a graph distribution diagram of a plurality of actual measurement points selected for marking RSSI in the wireless charging automatic matching method according to the embodiment of the present invention;

fig. 12 is a flowchart illustrating an automatic wireless charging matching method according to an embodiment of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In one embodiment, as shown in fig. 1, the present invention provides a wireless charging automatic matching method applied to a wireless charging automatic matching system, the system including: the system comprises vehicle-mounted equipment, ground equipment and a background system; the background system is installed in a server, such as a cloud server or a local server, and is respectively connected with the vehicle-mounted equipment and the ground equipment through a wireless network; the method comprises the following steps:

s1, the vehicle-mounted equipment sends a request message for distributing wireless charging equipment to a background system, wherein the request message carries a frequency list and/or a time sequence list of wireless signals which are supported and received by the vehicle-mounted equipment, and position information of the current vehicle-mounted equipment;

s2, the background system negotiates a designated frequency and/or a designated time sequence supported by the vehicle-mounted equipment and the ground equipment according to a request message for distributing the wireless charging equipment, which is sent by the vehicle-mounted equipment;

s3, the ground equipment transmits a beacon signal by using the specified frequency and/or time sequence;

and S4, the vehicle-mounted equipment receives the beacon signal transmitted by the specified frequency and/or the specified time sequence by using the specified frequency and/or the specified time sequence.

In this embodiment, the vehicle-mounted device sends a request message for allocating a wireless charging device to a backend system, the backend system negotiates a specified frequency and/or timing supported by both the vehicle-mounted device and the ground device according to the request message for allocating a wireless charging device sent by the vehicle-mounted device, the ground device transmits a beacon signal using the specified frequency and/or timing, and the vehicle-mounted device receives the beacon signal transmitted by the specified frequency and/or timing using the specified frequency and/or timing. When the vehicle approaches the wireless charging parking space, the frequency and the time sequence of the beacon signal transmitted by the receiving antenna of the vehicle-mounted device and the transmitting antenna of the ground device can be automatically negotiated, so that the receiving antenna of the wireless charging vehicle-mounted device can receive the beacon signal transmitted by the transmitting antenna of the ground device and used for guiding and positioning, and the guiding and positioning functions of the vehicle-mounted device are realized. The problem of wireless charging thereby can't guide the location because the frequency of the beacon signal that ground equipment transmitting antenna sent and the frequency of on-vehicle equipment's receiving antenna mismatch, lead to unable received corresponding beacon signal is solved.

Preferably, the background system is respectively connected with the vehicle-mounted equipment and the ground equipment through wireless networks such as 2G/4G/5G/WIFI.

In one embodiment, the ground device and the vehicle-mounted device are time synchronized through the NTP protocol to support beacon signal time sharing (timing) processing.

In one embodiment, in step S1, the radio signal frequency list includes low frequency bands that the vehicle-mounted device supports receiving, for example, the radio signal frequency list may include at least one of the following frequencies: 104KHz, 114KHz, 145KHz; the position information of the current vehicle-mounted equipment is obtained through at least one of the following ways: location information obtained by GPS, location information obtained by network location, location information selected by a user (e.g., a user may select a parking lot to select a corresponding location).

In one embodiment, in step S2, the background system negotiates a specified frequency and/or time sequence supported by both the vehicle-mounted device and the ground device according to a request message for allocating the wireless charging device sent by the vehicle-mounted device; the method comprises the following steps:

the background system receives a request message for distributing the wireless charging equipment, which is sent by the vehicle-mounted equipment;

acquiring a wireless signal frequency list and/or a time list and position information which are supported and received by the vehicle-mounted equipment from the request message of the wireless charging equipment;

acquiring the peripheral idle ground equipment of the position information from a database; the method comprises the following steps: the wireless signal frequency list and/or the time sequence list supported by the ground equipment can be manually configured into the background system database, or can be actively reported to the background system by the ground equipment and stored in the database; this ground equipment reports its charged state to this backstage system, and this backstage system sign this ground equipment's charged state includes: when the ground equipment is charged, reporting the charging state to the background system, and identifying that the ground equipment is charging by the background system and cannot be distributed to other vehicle-mounted equipment for wireless charging; when the ground equipment is idle or is idle after charging is finished, reporting an idle charging state to the background system, and marking that the ground equipment is idle by the background system and can be allocated to the vehicle-mounted equipment for charging;

and sending a beacon request message for starting the designated frequency to the obtained ground equipment, wherein the beacon request message for starting the designated frequency to send the beacon carries the designated frequency and/or the time sequence.

In this embodiment, the background device obtains the ground devices around the position where the vehicle-mounted device is located from the database, matches the frequency list and/or the time sequence list of the wireless signal supported and received by the vehicle-mounted device with the obtained frequency list and/or the time sequence list of the wireless signal supported and transmitted by the ground device, and negotiates a specified frequency and/or a specified time sequence supported by both the vehicle-mounted device and the ground device for communication. Therefore, when the vehicle approaches the wireless charging parking space, the frequency and the time sequence of the beacon signal transmitted by the receiving antenna of the vehicle-mounted device and the transmitting antenna of the ground device can be automatically negotiated, the beacon signal for guiding and positioning transmitted by the transmitting antenna of the ground device can be received by the receiving antenna of the wireless charging vehicle-mounted device, and the guiding and positioning functions of the vehicle-mounted device are realized.

In one embodiment, in the step S3, the ground device transmits a beacon signal using the specified frequency and/or timing; the method comprises the following steps:

the ground equipment receives the beacon request message sent by the background system and sent by the starting designated frequency;

transmitting a beacon signal by using the appointed frequency and/or the time sequence carried in the beacon request message sent by the starting appointed frequency;

and returning to start the designated frequency to send the beacon response message to the background system, wherein the start designated frequency sends the beacon response message carrying the success identifier or the failure identifier.

In this embodiment, the ground device transmits the beacon signal using the specified frequency and/or time sequence agreed by the background system, so that it is ensured that the receiving antenna of the wireless charging vehicle-mounted device can receive the beacon signal for guiding and positioning transmitted by the ground device transmitting antenna, thereby implementing the guiding and positioning function of the vehicle-mounted device.

In one embodiment, before the step S4, the vehicle-mounted device receives the beacon signal transmitted by the specified frequency and/or timing by using the specified frequency and/or timing, the method further includes:

the background system receives the beacon response message sent by the ground equipment and sent by the starting designated frequency;

and sending a response message of the distributed wireless charging equipment to the vehicle-mounted equipment according to the success identification carried in the beacon response message sent by the starting designated frequency, wherein the response message of the distributed wireless charging equipment carries the designated frequency and/or the time sequence and the ground equipment information. Wherein, the ground equipment information at least comprises one of the following information: position information of ground equipment and model information of the ground equipment.

In one embodiment, in the step S4, the receiving, by the vehicle-mounted device, the beacon signal transmitted by the specified frequency and/or timing by using the specified frequency and/or timing includes:

the vehicle-mounted equipment receives the response message of the distributed wireless charging equipment sent by the background system;

receiving a beacon signal of a specified wireless frequency and/or a specified time sequence by using the specified wireless frequency and/or time sequence setting receiving antenna carried in the distribution charging equipment response message;

and the vehicle-mounted equipment main control module guides the vehicle to navigate nearby the position of the ground equipment according to the position information of the ground equipment.

In this embodiment, the in-vehicle device receives a beacon signal of a specific wireless frequency and/or timing sequence using the specific frequency and/or timing sequence negotiated by the background system, and may communicate with a ground device of the specific frequency and/or timing sequence also negotiated by the background system. Therefore, when the vehicle approaches the wireless charging parking space, the frequency and the time sequence of the beacon signal transmitted by the receiving antenna of the vehicle-mounted device and the transmitting antenna of the ground device can be automatically negotiated, the beacon signal for guiding and positioning transmitted by the transmitting antenna of the ground device can be received by the receiving antenna of the wireless charging vehicle-mounted device, and the guiding and positioning functions of the vehicle-mounted device are realized.

In one embodiment, the method further comprises: the vehicle-mounted equipment receives the beacon signal transmitted by the ground equipment by using the specified frequency and/or the time sequence, and performs positioning processing by using the beacon signal to obtain positioning information of the vehicle-mounted equipment, wherein the positioning information comprises the current distance between the vehicle-mounted equipment and the ground equipment and the rotation angle of the vehicle coordinate system in which the vehicle-mounted equipment is located relative to the ground coordinate system in which the ground equipment is located. The rotation angle is a rotation angle α of a vehicle coordinate system of the vehicle-mounted device relative to a ground coordinate system of the ground device, and the rotation angle α is (-180 ° - +180 °), as shown in fig. 2.

Wherein, the rotation angle α of the vehicle coordinate system of the vehicle-mounted device relative to the ground coordinate system of the ground device is obtained by the following method (as shown in fig. 2):

a. the ground device 100 includes 4 transmitting antennas LF1, LF2, LF3, LF4, the vehicle-mounted device 200 includes two receiving antennas X1 and X2, the coordinates of the two receiving antennas are X1 and X2, respectively, wherein, the relative position of the coordinates X1 and X2 and a point coordinate O based on the ground coordinate system has been determined when the vehicle-mounted device is designed and installed, after determining the coordinates X1 and X2, the relative position of the coordinate O can be obtained according to the relative position above, and the rotation angle α of the vehicle coordinate system of the vehicle-mounted device relative to the ground coordinate system of the ground device and the distance between the vehicle-mounted device and the ground device can be obtained through the relative position of the coordinate O.

b. Forming 4 groups of antenna groups of three transmitting and one receiving by 4 transmitting antennas of the ground device 100 and a receiving antenna X1 of the vehicle-mounted device, wherein the groups are respectively as follows: the antenna comprises a 1 st antenna group (LF 1, LF2, LF3, X1), a 2 nd antenna group (LF 1, LF2, LF4, X1), a 3 rd antenna group (LF 1, LF3, LF4, X1) and a 4 th antenna group (LF 2, LF3, LF4, X1).

c. The vehicle-mounted device main control module 24 receives the signal strengths RSSI of the 3 beacon signals transmitted by the transmission antennas LF1, LF2, and LF 3.

d. The vehicle-mounted device main control module 24 calls a preset equal RSSI value function curve according to the obtained RSSI of the 3 beacon signals, and obtains 3 equal RSSI value function curves.

e. And obtaining a 1 st group of X1 coordinates of the receiving antenna X1 in the 1 st antenna group relative to the transmitting antennas LF1, LF2 and LF3 based on a ground coordinate system through a triangular centroid algorithm.

f. And then, through steps c, d and e similar to the above steps, 2 nd group X1 coordinates based on the ground coordinate system of the receiving antenna X1 in the 2 nd antenna group relative to the transmitting antennas LF1, LF2 and LF4, 3 rd group X1 coordinates based on the ground coordinate system of the receiving antenna X1 in the 3 rd antenna group relative to the transmitting antennas LF1, LF3 and LF4, and 4 th group X1 coordinates based on the ground coordinate system of the receiving antenna X1 in the 4 th antenna group relative to the transmitting antennas LF2, LF3 and LF4 are obtained respectively.

g. Thus, a total of 4 sets of X1 coordinates were obtained. And obtaining the actual coordinates of the X1 closest to the ground coordinate system by the obtained 4 groups of X1 coordinates according to a preset coordinate algorithm, and obtaining the actual coordinates of the X1 based on the ground coordinate system. The preset coordinate algorithm comprises a mean value algorithm.

h. And then obtaining the actual coordinate of the X2 closest to the ground coordinate system by a method similar to the steps b, c, d, e, f, g and h for obtaining the actual coordinate of the X1 closest to the ground coordinate system, and obtaining the actual coordinate of the X2 based on the ground coordinate system.

i. And obtaining a point O coordinate based on the ground coordinate system and a rotation angle alpha of the vehicle coordinate system relative to the ground coordinate system, wherein the rotation angle alpha is (-180 degrees to +180 degrees), according to the obtained X1 coordinate and X2 coordinate and the relative positions of the X1 coordinate, the X2 coordinate and the point O coordinate. The point O coordinate is the accurate positioning point of the vehicle-mounted equipment. And obtaining the rotation angle alpha of the vehicle coordinate system of the vehicle-mounted equipment relative to the ground coordinate system of the ground equipment and the distance between the vehicle-mounted equipment and the ground equipment through the relative position of the coordinate O.

Wherein, the triangle centroid algorithm is as follows:

the vehicle-mounted device main control module 24 calls a preset equal RSSI value function curve according to the obtained RSSI of the 3 beacon signals to obtain 3 equal RSSI value function curves, wherein the equal RSSI value function curves are circular or elliptical curves.

And selecting 3 nearest points from the 3 circular or elliptical curves, wherein the 3 points form a triangle, and selecting the coordinates of the center point of the triangle as the coordinates of the X1, so that the 1 st group X1 coordinates of the receiving antenna X1 in the 1 st antenna group relative to the transmitting antennas LF1, LF2 and LF3 based on the ground coordinate system can be obtained.

Optionally, the method further comprises: the vehicle-mounted equipment can reserve a ground device for charging to the background system in advance, and if the reservation is successful, the background system cannot distribute other vehicle-mounted equipment for charging within the appointed time.

The invention provides a wireless charging automatic matching method, which comprises the following steps: the vehicle-mounted equipment sends a request message for distributing the wireless charging equipment to a background system, wherein the request message carries a frequency list and/or a time sequence list of wireless signals which are supported and received by the vehicle-mounted equipment, and position information of the current vehicle-mounted equipment; the background system negotiates a designated frequency and/or a designated time sequence supported by the vehicle-mounted equipment and the ground equipment according to a request message for distributing the wireless charging equipment, which is sent by the vehicle-mounted equipment; the ground equipment transmits a beacon signal using the specified frequency and/or timing; the in-vehicle device receives the beacon signal transmitted at the specified frequency and/or timing using the specified frequency and/or timing. By the embodiment of the invention, when the vehicle approaches the wireless charging parking space, the frequency and the time sequence of the beacon signals transmitted by the receiving antenna of the vehicle-mounted device and the transmitting antenna of the ground device can be automatically negotiated, so that the receiving antenna of the wireless charging vehicle-mounted device can receive the beacon signals transmitted by the transmitting antenna of the ground device and used for guiding and positioning, and the guiding and positioning functions of the vehicle-mounted device are realized. The problem of wireless charging thereby can't guide the location because the frequency of the beacon signal that ground equipment transmitting antenna sent and the frequency of on-vehicle equipment's receiving antenna mismatch, lead to unable received corresponding beacon signal is solved.

In one embodiment, as shown in fig. 3, the present invention provides a wireless charging automatic matching system, comprising: the vehicle-mounted device 200, the ground device 100 and the background system 300; the background system 300 is installed in a server, such as a cloud server or a local server, and is connected to the vehicle-mounted device 200 and the ground device 100 through a wireless network; wherein:

the vehicle-mounted device 200 is configured to send a request message for allocating a wireless charging device to the backend system 300, where the request message carries a frequency list and/or a time list of wireless signals that the vehicle-mounted device 200 supports receiving, and location information of the current vehicle-mounted device 200;

the background system 300 is configured to negotiate a specified frequency and/or time sequence supported by both the vehicle-mounted device 200 and the ground device 100 according to the request message for allocating the wireless charging device sent by the vehicle-mounted device 200;

the ground device 100, configured to transmit a beacon signal using the specified frequency and/or timing;

the in-vehicle device 200 is further configured to receive the beacon signal transmitted at the specified frequency and/or timing using the specified frequency and/or timing.

In this embodiment, the vehicle-mounted device sends a request message for allocating a wireless charging device to a backend system, the backend system negotiates a specified frequency and/or timing supported by both the vehicle-mounted device and the ground device according to the request message for allocating a wireless charging device sent by the vehicle-mounted device, the ground device transmits a beacon signal using the specified frequency and/or timing, and the vehicle-mounted device receives the beacon signal transmitted by the specified frequency and/or timing using the specified frequency and/or timing. When a vehicle approaches a wireless charging parking space, the frequency and the time sequence of the beacon signal transmitted by the receiving antenna of the vehicle-mounted device and the transmitting antenna of the ground device can be automatically negotiated, the receiving antenna of the wireless charging vehicle-mounted device can receive the beacon signal which is transmitted by the transmitting antenna of the ground device and used for guiding and positioning, and therefore the guiding and positioning functions of the vehicle-mounted device are achieved. The problem of thereby the frequency of the beacon signal that ground equipment transmitting antenna sent and the frequency of on-vehicle equipment's receiving antenna mismatch when wireless charging, lead to unable received beacon signal that corresponds to guide the location is solved.

Optionally, the background system is connected with the vehicle-mounted device and the ground device through wireless networks such as 2G/4G/5G/WIFI and the like.

In one embodiment, the radio signal frequency list includes low frequency bands that the vehicle-mounted device supports receiving, for example, the radio signal frequency list includes at least one of the following frequencies: 104KHz, 114KHz, 145KHz; the position information of the current vehicle-mounted equipment is acquired through at least one of the following ways: location information obtained by GPS, location information obtained by network location, location information selected by a user (e.g., a user may select a parking lot to select a corresponding location).

In one embodiment, the backend system 300 is configured to negotiate a specific frequency and/or timing supported by both the vehicle-mounted device 200 and the ground device 100 according to the request message for allocating a wireless charging device sent by the vehicle-mounted device 200; the method specifically comprises the following steps:

the background system 300 receives a request message for allocating wireless charging equipment, which is sent by the vehicle-mounted equipment 200;

acquiring a frequency list and/or a time list and position information of wireless signals supported and received by the vehicle-mounted device 200 from the request message for allocating the wireless charging device;

acquiring the ground equipment 100 with idle periphery of the position information from the database; the method comprises the following steps: the wireless signal frequency list and/or the time sequence list supported by the ground equipment can be manually configured into the background system database, or can be actively reported to the background system by the ground equipment and stored in the database; this ground equipment reports its charged state to this backstage system, and this backstage system sign this ground equipment's charged state includes: when the ground equipment is charged, reporting the charging state to the background system, and identifying that the ground equipment is charging by the background system and cannot be distributed to other vehicle-mounted equipment for wireless charging; when the ground equipment is idle or is idle after charging is finished, reporting an idle charging state to the background system, wherein the background system marks that the ground equipment is idle and can be allocated to the vehicle-mounted equipment for charging;

matching the frequency list and/or the time sequence list of the wireless signal supported and received by the vehicle-mounted device 200 with the acquired frequency list and/or the acquired time sequence list of the wireless signal supported and transmitted by the ground device 100, and negotiating a specified frequency and/or a time sequence supported by the vehicle-mounted device 200 and the ground device 100 for communication;

and sending a start-designated frequency beacon sending request message to the acquired ground equipment 100, wherein the start-designated frequency beacon sending request message carries designated frequency and/or time sequence.

In one embodiment, the surface device 100 is configured to transmit a beacon signal using the specified frequency and/or timing; the method specifically comprises the following steps:

the ground device 100 receives the beacon request message sent by the background system 300 and sent by the start-up designated frequency;

transmitting a beacon signal by using the appointed frequency and/or the appointed time sequence carried in the beacon request message sent by the starting appointed frequency;

and returning a beacon response message sent at the starting designated frequency to the background system 300, wherein the beacon response message sent at the starting designated frequency carries a success identifier or a failure identifier.

In one embodiment, before the in-vehicle device 200 receives the beacon signal transmitted by the designated frequency and/or timing, the background system 300 is further configured to:

the background system 300 receives the beacon response message sent by the ground device 100 and sent by the start designated frequency;

and sending a response message of the distributed wireless charging equipment to the vehicle-mounted equipment 100 according to the success identifier carried in the beacon response message sent by the starting designated frequency, wherein the response message of the distributed wireless charging equipment carries the designated frequency and/or the timing sequence and the ground equipment information. Wherein, the ground equipment information at least comprises one of the following information: ground equipment position information and ground equipment model information.

In one embodiment, the vehicle-mounted device 200 is further configured to receive the beacon signal transmitted by the designated frequency and/or timing sequence by using the designated frequency and/or timing sequence, and specifically includes:

the vehicle-mounted device 200 receives the distributed wireless charging device response message sent by the background system 300;

Optionally, the background system 300 may also be deployed in the ground device 100, and the vehicle-mounted device 200 accesses the ground device 100 through a local network (such as WiFi, bluetooth, and the like), and calls a preset equal RSSI value function curve, thereby implementing interaction with the background system 300.

Optionally, the backend system 300 is composed of computer software and hardware, and may also be a cloud server.

In one embodiment, the in-vehicle apparatus 200 is further configured to: and receiving a beacon signal transmitted by the ground equipment by using the specified frequency and/or the time sequence, and performing positioning processing by using the beacon signal to obtain positioning information of the vehicle-mounted equipment, wherein the positioning information comprises the current distance between the vehicle-mounted equipment and the ground equipment and the rotation angle of a vehicle coordinate system in which the vehicle-mounted equipment is located relative to the ground coordinate system in which the ground equipment is located.

The invention provides a wireless charging automatic matching system, comprising: the system comprises vehicle-mounted equipment, ground equipment and a background system; the background system is installed in a server, such as a cloud server or a local server, and is respectively connected with the vehicle-mounted equipment and the ground equipment through a wireless network; wherein: the vehicle-mounted equipment is used for sending a request message for distributing the wireless charging equipment to the background system, wherein the request message carries a wireless signal frequency list and/or a time sequence list which are supported and received by the vehicle-mounted equipment and the position information of the current vehicle-mounted equipment; the background system is used for negotiating out a specified frequency and/or time sequence supported by the vehicle-mounted equipment and the ground equipment according to the request message for distributing the wireless charging equipment sent by the vehicle-mounted equipment; the ground equipment is used for transmitting a beacon signal by using the specified frequency and/or time sequence; the in-vehicle device is further configured to receive a beacon signal transmitted at the specified frequency and/or timing using the specified frequency and/or timing. By the embodiment of the invention, when the vehicle approaches the wireless charging parking space, the frequency and the time sequence of the beacon signals transmitted by the receiving antenna of the vehicle-mounted device and the transmitting antenna of the ground device can be automatically negotiated, so that the receiving antenna of the wireless charging vehicle-mounted device can receive the beacon signals transmitted by the transmitting antenna of the ground device and used for guiding and positioning, and the guiding and positioning functions of the vehicle-mounted device are realized. The problem of thereby the frequency of the beacon signal that ground equipment transmitting antenna sent and the frequency of on-vehicle equipment's receiving antenna mismatch when wireless charging, lead to unable received beacon signal that corresponds to guide the location is solved.

It should be noted that the system embodiment and the method embodiment belong to the same concept, and specific implementation processes thereof are described in detail in the method embodiment, and technical features in the method embodiment are correspondingly applicable in the system embodiment, which is not described herein again.

The present invention will be described in further detail with reference to more specific examples.

In one embodiment, please refer to fig. 3 to 11. The invention provides a wireless charging automatic matching system, which comprises: the ground device 100, the vehicle-mounted device 200 and the background system 300; the background system 300 is installed with a local server, and is respectively connected with the vehicle-mounted device 200 and the ground device 100 through a wireless network; wherein:

the in-vehicle apparatus 200 is mounted on a vehicle, and includes: a

secondary charging coil

21, 2 receiving antennas 22, a receiving antenna control module 23, an in-vehicle device main control module 24 and an in-vehicle power supply 25; wherein:

the receiving antenna 22 is installed in the receiving antenna control module 23, receives the beacon signal transmitted from the transmitting antenna 12, and transmits the received beacon signal to the receiving antenna control module 23.

The receiving antenna control module 23 is installed in the secondary charging coil 21, receives the beacon signal transmitted by the receiving antenna 22, and measures the signal strength RSSI of the beacon signal.

The vehicle-mounted power supply 25 is connected to the receiving antenna control module 23, and is configured to supply power to the receiving antenna control module 23.

The vehicle-mounted device main control module 24 is in communication connection with the receiving antenna control module 23 and the background system 300, and communicates with each other to exchange relevant information; the method comprises the following steps:

the vehicle-mounted device main control module 24 sends a request message for allocating the wireless charging device to the backend system 300, where the request message carries a frequency list and/or a time list of the wireless signals that the vehicle-mounted device 200 supports receiving, and location information of the current vehicle-mounted device 200. The radio signal frequency list includes a low frequency band that the vehicle-mounted device supports receiving, for example, the radio signal frequency list includes at least one of the following frequencies: 104KHz, 114KHz, 145KHz; the position information of the current vehicle-mounted equipment is acquired through at least one of the following ways: location information obtained by GPS, location information obtained by network location, location information selected by a user (e.g., a user may select a parking lot to select a corresponding location).

The background system 300 is configured to negotiate a specified frequency and/or time sequence supported by both the vehicle-mounted device 200 and the ground device 100 according to a request message for allocating a wireless charging device, which is sent by the vehicle-mounted device main control module 24 of the vehicle-mounted device 200; the method comprises the following steps:

the background system 300 receives a request message for allocating wireless charging devices sent by the vehicle-mounted device main control module 24;

acquiring a wireless signal frequency list and/or a time list and position information which are supported and received by the vehicle-mounted device 200 from the wireless charging device distribution request message;

acquiring the ground equipment 100 with idle periphery of the position information from the database;

This ground equipment 100 is installed on charging parking stall, includes: the system comprises a primary

side charging coil

11, 4 transmitting antennas 12, a transmitting antenna control module 13, a ground equipment main control module 14 and a ground side power supply 15; wherein:

the maximum distance that the transmitting antenna 12 can sense is 6m, the transmitting antenna is fixedly installed on the primary charging coil 11, the transmitting antenna control module 13 is connected with 4 transmitting antennas 12 through a wire harness, and the 4 transmitting antennas 12 are driven to transmit a beacon signal at the same time, that is, the 4 transmitting antennas 12 are driven by the transmitting antenna control module 13 to transmit the beacon signal.

The ground device main control module 14 is in communication connection with the transmitting antenna control module 13 and the background system 300, and communicates with each other to exchange relevant information.

The ground side power supply 15 is connected to the transmitting antenna control module 13, and is configured to provide power to the transmitting antenna control module 13.

The ground device 100 is configured to transmit a beacon signal using the specified frequency and/or timing; the method specifically comprises the following steps:

the ground device main control module 14 receives the beacon request message sent by the background system 300 and sent by the start-up designated frequency;

the transmitting antenna 12 transmits a beacon signal at the specified frequency and/or the specified timing carried in the beacon request message using the starting specified frequency; as shown in fig. 8. The method specifically comprises the following steps:

the 4 transmitting antennas 12, driven by the transmitting antenna control module 13, use the starting designated frequency to transmit the designated frequency and/or the timing sequence transmitting beacon signal carried in the beacon request message, including:

the 4 transmitting antennas 12 transmit a group of beacon signals every 50-100ms under the driving of the transmitting antenna control module 13, wherein the group of beacon signals comprises a wakeup pairing code and 4 pulse signals continuously transmitted by the 4 transmitting antennas in turn; the awakening pairing code is used for marking a group of transmitting antennas of paired ground equipment and receiving antennas of corresponding vehicle-mounted equipment; 4 pulse signals continuously transmitted by the 4 transmitting antennas in turn are used for receiving and measuring the signal strength RSSI of the beacon signals by the vehicle-mounted equipment.

The ground device main control module 14 returns a start-designated frequency beacon transmission response message to the background system 300, where the start-designated frequency beacon transmission response message carries a success identifier or a failure identifier.

The backend system 300 is further configured to:

the background system 300 receives the beacon response message sent by the ground device main control module 14 and sent by the start designated frequency;

and sending a response message of the distributed wireless charging equipment to the vehicle-mounted equipment 100 according to the success identifier carried in the beacon response message sent by the starting designated frequency, wherein the response message of the distributed wireless charging equipment carries the designated frequency and/or the timing sequence and the ground equipment information. Wherein, the ground equipment information at least comprises one of the following information: position information of ground equipment and model information of the ground equipment.

The vehicle-mounted device 200 is further configured to receive a beacon signal transmitted by the specified frequency and/or timing sequence by using the specified frequency and/or timing sequence, and specifically includes:

the vehicle-mounted device main control module 24 receives the distributed wireless charging device response message sent by the background system 300;

the receiving antenna 22 receives the beacon signal of the designated wireless frequency and/or timing using the designated wireless frequency and/or timing carried in the distributed charging apparatus response message;

transmitting the ground device location information carried in the distributed wireless charging device response message to the vehicle-mounted device main control module 24;

the on-board device main control module 24 guides the vehicle to navigate around the location of the ground device according to the ground device location information.

The in-vehicle apparatus 200 is also configured to: the receiving antenna 22 receives the beacon signal transmitted by the ground device by using the specified frequency and/or time sequence, and performs positioning processing by using the beacon signal to obtain positioning information of the vehicle-mounted device, where the positioning information includes a current distance between the vehicle-mounted device and the ground device and a rotation angle α of a vehicle coordinate system in which the vehicle-mounted device is located relative to the ground coordinate system in which the ground device is located.

The receiving antenna 22 of the vehicle-mounted device 200 receives the beacon signal transmitted by the ground device by using the specified frequency and/or time sequence, and performs positioning processing by using the beacon signal to obtain the positioning information of the vehicle-mounted device, which specifically includes:

the receiving antenna 22 receives the beacon signal transmitted by the ground device by using the designated frequency and/or timing sequence, and transmits the beacon signal to the receiving antenna control module 23;

the receiving antenna control module 23 receives the beacon signal and measures the signal strength of the beacon signal; the method comprises the following steps:

the receiving antenna control module 23 receives the beacon signal and measures the signal strength of the beacon signal, and transmits the signal strength of the beacon signal to the in-vehicle device main control module 24 of the in-vehicle device 200.

The vehicle-mounted device main control module 24 acquires identification information of corresponding ground devices from the background system 300;

the vehicle-mounted device main control module 24 acquires the current wireless charging environment temperature through a temperature detection device;

the vehicle-mounted equipment main control module 24 acquires the ground clearance of the current vehicle type through a vehicle-mounted computer;

the receiving antenna 22 receives the beacon signal transmitted by the transmitting antenna 12 and transmits the beacon signal to the receiving antenna control module 23;

the receiving antenna control module 23 receives the beacon signal and measures the signal strength RSSI of the beacon signal;

the main control module 24 of the vehicle-mounted device reports a request message for obtaining the function curve of the equal RSSI values to the background system 300; the request message carries the RSSI, the ambient temperature, the vehicle type ground clearance and the ground equipment identification information.

The background system 300 obtains a corresponding equal RSSI value function curve according to the RSSI and ground device identification information in the equal RSSI value function curve request message reported by the vehicle-mounted device main control module 24;

and returning the acquired corresponding equal RSSI value function curve to the vehicle-mounted device main control module 24 of the vehicle-mounted device 200.

The vehicle-mounted device main control module 24 obtains the positioning information of the vehicle-mounted device 200 according to the equal RSSI value function curve returned from the background system 300, where the positioning information includes the current distance between the vehicle-mounted device 200 and the ground device 100 and the rotation angle α of the vehicle coordinate system in which the vehicle-mounted device 200 is located relative to the ground coordinate system in which the ground device 100 is located.

The vehicle-mounted device 200 repeats the above process of reporting the RSSI value function curve acquisition request message to acquire the positioning information, and corrects the accurate positioning of the vehicle-mounted device 200 step by step until the rotation angle α is zero or close to zero and the distance between the vehicle-mounted device and the ground device is zero or close to zero, so as to guide the center point of the vehicle-mounted device 200 and the ground device 100 to be positioned in a superposed manner, thereby achieving an ideal alignment state.

As shown in fig. 9, the ideal alignment state is: the center points of the in-vehicle apparatus 200 and the ground apparatus 100 completely coincide. The charging slot where the ground device 100 is located is divided into an X axis and a Y axis to form a ground coordinate system, where the front-back direction (driving direction) of the vehicle is the X axis, and the left-right direction (vertical driving direction) of the vehicle is the Y axis. The above-described perfect coincidence is that the in-vehicle apparatus 200 coincides with the center point of the ground apparatus 100.

The preset equal RSSI value function curve is obtained by the ground device main control module 14 of the ground device 100 according to the signal strength of the beacon signal, and the specific process of obtaining includes:

after the ground equipment 100 is installed, taking 31 actual measurement points for calibration by taking a transmitting antenna as a reference and taking preset rotation angles of 0 degree, 45 degrees and 90 degrees; as shown in fig. 10 and 11, the abscissa X represents a distance of 0 to 6m, and the ordinate Y represents the signal strength RSSI of the beacon signal;

selecting 31 actual measurement points, respectively detecting RSSI data calibrated at the actual measurement points by using different vehicle types with the ground clearance (for example, the ground clearance of a car is generally between 110 and 130 mm, the ground clearance of an SUV is between 200 and 250 mm, and the ground clearance of a passenger car is between 250 and 350 mm) and different charging environment temperatures (for example, between-30 and-10 ℃, between 10 and 30 ℃ and between 30 and 50 ℃) at preset rotation angles of 0 degree, between 45 degrees and between 90 degrees, obtaining 3 groups of RSSI calibration data at the preset rotation angles of 0 degree, between 45 degrees and 90 degrees, synthesizing the obtained 3 groups of RSSI calibration data into 3 basic function curves, and obtaining the corresponding relation between the 31 actual measurement points and the RSSI within the maximum induction distance of 6m of the transmitting antenna as shown in the following formula:

f(x)＝ax^6+bx^5+cx^4+dx^3+ex^2+fx+g

wherein, three groups of (a, b, c, d, e, f, g) constants correspond to 3 basic function curves.

Wherein the (a, b, c, d, e, f, g) constant can be obtained by field testing of the installation floor device 100. The RSSI values of 31 actual measuring points are actually tested on the spot, and then corresponding curves are drawn by using software to obtain corresponding constants.

Based on the obtained 3 groups of calibration data, 88 life-extending function curves of 1-44 degrees and 46-89 degrees are calculated according to exponential function distribution, and the corresponding relation between each measured point and the RSSI within a preset rotation angle range (0 degrees to +90 degrees) in the XY plane is obtained; the 88 linear prolongation function curves are obtained through software simulation, namely marking is carried out on each degree and the magnetic field edge of the wireless antenna, and then the curves are obtained through software calculation.

And converting the 3 basic function curves and 88 extended function curves to obtain preset equal RSSI value function curves within the range of the rotation angle (-180 degrees to +180 degrees), thereby obtaining the corresponding relation between each measured point and the RSSI within the range of the rotation angle (-180 degrees to +180 degrees). The RSSI value function curves show that under the condition of the same RSSI value, different real measuring points correspond to different distances within the range of the rotating angle of (-180 degrees to +180 degrees), so that an elliptic curve or an irregular curve is formed. The RSSI value function curves include actual measuring point distance information, rotation angle information, vehicle type height from the ground, charging environment temperature information, and corresponding RSSI information, which reflect the environment temperature of the current vehicle (after the vehicle type is determined, the height from the ground of the vehicle type is also correspondingly determined) during charging, the distance between the current position of the vehicle (i.e. the vehicle-mounted device) and the center point of the ground device, the rotation angle α of the vehicle coordinate system where the vehicle-mounted device is located relative to the ground coordinate system where the ground device is located, and the positioning information of the RSSI value of the current vehicle at the actual measuring point. At this time, if the current RSSI information of the on-board device of the current vehicle is measured, an equal RSSI value function curve corresponding to the current RSSI information can be obtained according to the current RSSI information, and the positioning information corresponding to the RSSI information can be obtained.

After the above processing, the ground device can obtain 31 actual measurement points according to RSSI calibration data of different vehicle types within a range of a rotation angle (-180 °) according to the ground clearance (the ground clearance of a car is generally between 110 mm and 130 mm, the ground clearance of an SUV is between 200 mm and 250 mm, and the ground clearance of a passenger car is between 250 mm and 350 mm) and different charging environment temperatures (-40 ℃ -85 ℃), and according to RSSI value function curves such as synthesis of the RSSI calibration data, corresponding relations between the 31 actual measurement points and the RSSI within a range of the rotation angle (-180 °) within the maximum induction distance of 6m of the transmitting antenna are obtained.

The background system 300 stores the RSSI value function curves obtained by the ground device 100 and the identification information of the ground device corresponding to the RSSI value function curves, wherein the identification information includes SN numbers of the ground devices.

In one embodiment, as shown in FIG. 12. The invention provides a wireless charging automatic matching method, which is applied to a wireless charging automatic matching system, and the system comprises: the system comprises vehicle-mounted equipment, ground equipment and a background system; the background system is installed in a server, such as a cloud server or a local server, and is respectively connected with the vehicle-mounted equipment and the ground equipment through a wireless network; the method comprises the following steps:

s401, when wireless charging is needed, the vehicle-mounted equipment sends a request message for allocating wireless charging equipment to a background system, wherein the request message for allocating wireless charging equipment carries a frequency list and/or a time list of wireless signals supported and received by the vehicle-mounted equipment and position information of the current vehicle-mounted equipment; the radio signal frequency list includes a low frequency band that the vehicle-mounted device supports receiving, for example, the radio signal frequency list includes at least one of the following frequencies: 104KHz, 114KHz, 145KHz; the position information of the current vehicle-mounted equipment is acquired through at least one of the following ways: position information acquired by GPS, position information acquired by network positioning and position information selected by a user.

S402, the background system receives a request message for distributing wireless charging equipment, which is sent by the vehicle-mounted equipment; acquiring a wireless signal frequency list and/or a time list and position information which are supported and received by the vehicle-mounted equipment from the request message of the wireless charging equipment;

s403, acquiring the idle ground equipment around the position information from the database;

s404, matching the frequency list and/or the time sequence list of the wireless signal supported and received by the vehicle-mounted equipment with the frequency list and/or the time sequence list of the wireless signal supported and transmitted by the ground equipment, and negotiating a specified frequency and/or a time sequence supported by the vehicle-mounted equipment and the ground equipment for communication;

and S405, sending a beacon request message for starting the designated frequency to send to the acquired ground equipment, wherein the beacon request message for starting the designated frequency to send carries the designated frequency and/or the timing sequence.

S406, the ground equipment receives the beacon request message sent by the background system and sent by the starting designated frequency;

s407, using the starting designated frequency to send the designated frequency and/or the timing sequence carried in the beacon request message to transmit a beacon signal;

and S408, returning a starting designated frequency sending beacon response message to the background system, wherein the starting designated frequency sending beacon response message carries a success identifier or a failure identifier.

S409, the background system receives the beacon response message sent by the ground equipment and sent by the starting designated frequency;

and S410, sending a response message of the distributed wireless charging equipment to the vehicle-mounted equipment according to the success identification carried in the beacon response message sent by the starting designated frequency, wherein the response message of the distributed wireless charging equipment carries the designated frequency and/or the time sequence and the ground equipment information. Wherein, the ground equipment information at least comprises one of the following information: ground equipment location (e.g., -2D zone 62 parking space) information, ground equipment model information.

S411, the vehicle-mounted equipment receives the response message of the distributed wireless charging equipment sent by the background system;

s412, using the designated wireless frequency and/or timing setting receiving antenna carried in the distribution charging device response message to receive a beacon signal of the designated wireless frequency and/or timing;

s413, transmitting the ground device location information carried in the distributed wireless charging device response message to the vehicle-mounted device main control module;

and S414, the vehicle-mounted equipment main control module guides the vehicle to navigate nearby the position of the ground equipment according to the position information of the ground equipment.

And S415, the vehicle-mounted device receives the beacon signal transmitted by the ground device by using the specified frequency and/or time sequence, and performs positioning processing by using the beacon signal to obtain positioning information of the vehicle-mounted device, wherein the positioning information comprises the current distance between the vehicle-mounted device and the ground device and a rotation angle alpha of a vehicle coordinate system in which the vehicle-mounted device is located relative to the ground coordinate system in which the ground device is located, and the rotation angle alpha ranges from (-180 DEG to +180 deg).

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes several instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A wireless charging automatic matching method is applied to a wireless charging automatic matching system, and is characterized in that the system comprises: the system comprises vehicle-mounted equipment, ground equipment and a background system; the background system is installed in a server and is respectively connected with the vehicle-mounted equipment and the ground equipment through a wireless network; the method comprises the following steps:

the ground device transmitting a beacon signal using the specified frequency and/or timing;

the vehicle-mounted equipment receives a beacon signal transmitted by the specified frequency and/or time sequence by using the specified frequency and/or time sequence;

the background system negotiates a designated frequency and/or a designated time sequence supported by the vehicle-mounted equipment and the ground equipment according to the request message for allocating the wireless charging equipment; the method comprises the following steps:

receiving the distribution wireless charging device request message;

2. The method of claim 1, wherein the list of wireless signal frequencies includes low frequency bands that the in-vehicle device supports receiving; the position information of the vehicle-mounted equipment is acquired through at least one of the following ways: position information acquired by GPS, position information acquired by network positioning and position information selected by a user.

3. The method of claim 1, wherein the wireless network comprises at least one of: 2G, 4G, 5G, WIFI.

4. The method of claim 1, wherein the ground device transmits a beacon signal using the specified frequency and/or timing; the method comprises the following steps:

and returning to start the designated frequency and sending a beacon response message to the background system, wherein the start designated frequency and the beacon response message carry a success identifier or a failure identifier.

5. The method of claim 4, wherein before the in-vehicle device receives the beacon signal transmitted by the specified frequency and/or timing sequence by using the specified frequency and/or timing sequence, the method further comprises:

sending a response message of the distributed wireless charging equipment to the vehicle-mounted equipment according to a success identifier carried in the beacon response message sent by the starting designated frequency, wherein the response message of the distributed wireless charging equipment carries the designated frequency and/or the timing sequence and the ground equipment information; wherein the ground equipment information at least comprises one of the following information: position information of ground equipment and model information of the ground equipment.

6. The method of claim 5, wherein the receiving, by the vehicle-mounted device, the beacon signal transmitted at the specified frequency and/or timing using the specified frequency and/or timing comprises:

the vehicle-mounted equipment receives the response message of the distributed wireless charging equipment;

and setting a receiving antenna to receive a beacon signal with specified frequency and/or time sequence by using the specified frequency and/or time sequence carried in the response message of the distributed wireless charging equipment.

7. The method of claim 6, wherein the in-vehicle device receives the beacon signal transmitted at the specified frequency and/or timing using the specified frequency and/or timing, and further comprising:

8. The method of claim 7, further comprising:

and positioning by using the beacon signal to obtain positioning information of the vehicle-mounted equipment, wherein the positioning information comprises the current distance between the vehicle-mounted equipment and the ground equipment and the rotation angle of a vehicle coordinate system where the vehicle-mounted equipment is located relative to the ground coordinate system where the ground equipment is located.

9. A wireless charging automatic matching system applied to the wireless charging automatic matching method according to any one of claims 1 to 8, the system comprising: the system comprises vehicle-mounted equipment, ground equipment and a background system; the background system is installed in the server and is respectively connected with the vehicle-mounted equipment and the ground equipment through a wireless network; wherein:

the background system is configured to negotiate a specified frequency and/or time sequence supported by both the vehicle-mounted device and the ground device according to the request message for allocating the wireless charging device, and includes:

receiving the distribution wireless charging device request message;

matching the frequency list and/or the time sequence list of the wireless signals supported and received by the vehicle-mounted equipment with the frequency list and/or the time sequence list of the wireless signals supported and transmitted by the ground equipment, and negotiating a specified frequency and/or a time sequence supported by the vehicle-mounted equipment and the ground equipment for communication;

sending a beacon request message for starting designated frequency transmission to the acquired ground equipment, wherein the beacon request message for starting designated frequency transmission carries designated frequency and/or time sequence;