阅读说明：本技术 一种自动化智能停车管理系统及方法 (Automatic intelligent parking management system and method ) 是由 兰昀正 于 2021-09-15 设计创作，主要内容包括：本发明属于停车场管理技术领域,公开了一种自动化智能停车管理系统及方法,方法包括：S1、停车管理系统服务端基于场内停车位的占用状态信息生成对用户的停车位推荐信息,S2、停车管理系统导航端通过获取停车管理系统移动端的场内位置并结合停车场内电子地图,生成对车辆的室内导航路线,将车辆引导至用户选择的停车位附近区域；S3、服务端通过分析车辆图像得到车宽信息并结合停车位信息,确定关于车辆的停车提醒区域,当车辆进入停车提醒区域时,向用户发送提醒消息；S4、用户完成停车后,服务端通过分析停车管理系统信息采集端收集的停车位上的信息对车辆停车状态进行监测,本发明实现自动为用户推荐合适的停车位,并给用户提供停车提醒的功能。(The invention belongs to the technical field of parking lot management, and discloses an automatic intelligent parking management system and method, wherein the method comprises the following steps: s1, the parking management system server generates parking place recommendation information for the user based on the occupation state information of the parking places in the parking lot, and S2 the parking management system navigation end generates an indoor navigation route for the vehicle by acquiring the in-lot position of the parking management system mobile end and combining with an electronic map in the parking lot, and guides the vehicle to the area near the parking place selected by the user; s3, the server side obtains the vehicle width information by analyzing the vehicle image and determines the parking reminding area of the vehicle by combining with the parking space information, and when the vehicle enters the parking reminding area, a reminding message is sent to the user; and S4, after the user finishes parking, the server side monitors the parking state of the vehicle by analyzing the information on the parking spaces collected by the information collection end of the parking management system.)

1. An automatic intelligent parking management method is characterized by comprising the following steps:

s1, obtaining position information of a mobile terminal of the parking management system, judging whether a user vehicle enters a parking lot area or not according to the position information, collecting and uploading occupation state information of each parking space in the parking lot when the user vehicle enters the parking lot area, generating parking space recommendation information by a service terminal of the parking management system based on the occupation state information of the parking spaces, and sending the parking space recommendation information to the mobile terminal;

s2, browsing the parking place recommendation information and selecting a final parking place on a mobile end of the parking management system by a user, and generating indoor navigation information for the user vehicle by the navigation end of the parking management system through acquiring the position in the parking lot of the mobile end in real time and combining an electronic map in the parking lot to guide the user vehicle to the parking place area selected by the user;

s3, the parking management system server sends an instruction to the parking management system information acquisition end to enable the parking management system information acquisition end to collect and upload image information about a user vehicle, the server obtains information about the length and width of the user vehicle by analyzing the image information and determines a parking reminding area about the user vehicle by combining with parking space information selected by a user, the server also correspondingly generates a simulation image of the user vehicle on an electronic map in the parking lot based on the position of the user vehicle, and when the central position of the simulation image of the user vehicle enters the parking reminding area, a reminding message is sent to a mobile end of the parking management system;

and S4, after the user finishes parking, the information collection end of the parking management system continues to collect information of the parking space, including image information and sensor information, the service end of the parking management system monitors the parking state of the user vehicle by analyzing the information of the parking space, and when the service end monitors that the user vehicle is abnormal, the service end sends an alarm message to the mobile end of the parking management system.

2. The automated intelligent parking management method according to claim 1, wherein the parking space recommendation information is generated by the parking management system service end based on the occupancy state information of the parking space in S1, comprising the following steps:

s11, generating a candidate set of recommended parking spaces according to the information of all unoccupied parking spaces, wherein the candidate set comprises unique serial number information of the parking spaces and outlet information corresponding to the parking spaces, and traversing different parking spaces in the candidate set in sequence;

s12, in the candidate set, setting the recommended priority of the independent parking spaces and the non-independent parking spaces with the vacant parking spaces at the left and right sides as high level, setting the recommended priority of the non-independent parking spaces with the vacant parking spaces at the left and right sides as middle level, and setting the recommended priority of the non-independent parking spaces with the vacant parking spaces at the left and right sides as low level;

and S13, generating parking space recommendation information according to the candidate set of recommended parking spaces processed in the previous step and the order from high to low of the recommendation priority of the parking spaces.

3. The method according to claim 2, wherein the exit information corresponding to the parking space in S11 specifically includes location information of a parking lot exit closest to the location of the parking space and related information of an area reachable by the user through the parking lot exit.

4. The method as claimed in claim 1, wherein the step S3, the service end of the parking management system obtains the length and width information of the user vehicle by analyzing the image information of the user vehicle, and the process comprises using image recognition technology to obtain the identification result of the brand and model of the user vehicle for the image information of the user vehicle, and finding the length and width information of the vehicle from the vehicle database according to the brand and model of the user vehicle.

5. The automated intelligent parking management method of claim 1, wherein the step of determining the parking reminding area of the user vehicle in the parking lot based on the user vehicle information and the user-selected parking space information in combination in S3 comprises the steps of:

s31, acquiring an electronic map in a site and establishing a coordinate system, wherein the center of a parking space selected by a user is used as an origin, an X axis is generated along the direction of a parking road near the parking space, specifically, the driving direction of a vehicle is used as the positive direction of the X axis, a Y axis is generated along the direction vertical to the X axis, and specifically, the side where the road is located is used as the positive direction of the Y axis;

s32, calculating the minimum turning radius r of the user when the user parks the vehicle₁，Wherein l represents the length of the parking space, h represents the vehicle width of the vehicle, and p represents the distance between the boundary of the parking space close to the side of the road and the boundary of the road close to the parking space;

s33, calculating the maximum turning radius r of the user when the user parks the vehicle₂，Wherein l represents the length of the parking space, h represents the vehicle width of the vehicle, p represents the distance between the boundary of one side of the parking space close to the road and the boundary of one side of the road close to the parking space, and k represents the distance between the side edge of one side of the vehicle close to the parking space and the boundary of one side of the road close to the parking space when the vehicle is positioned on the boundary of one side of the road far away from the parking space;

s34, calculating the minimum turning radius r of the vehicle₁When parking, the vehicle is at the central point coordinate point q on the parking road₁，q₁＝(r₁,r₁) Calculating the maximum turning radius r of the vehicle₂When parking, the vehicle is at the central point coordinate point q on the parking road₂，q₂＝(r₂,r₂) With q₁And q is₂The connecting line between the parking reminding areas is used as a diagonal line to construct a rectangle, and the area defined by the rectangle is the parking reminding area.

6. An automated intelligent parking management system for implementing the method according to any one of claims 1 to 5, characterized in that it comprises the following modules:

the system comprises a first module, a second module and a third module, wherein the first module is used for realizing the functions of an information acquisition end of a parking management system, and comprises the steps of collecting and uploading the occupation state information of each parking space in a parking lot, collecting and uploading image information related to a user vehicle, and collecting and uploading the image information and sensor information related to the parking space;

the second module is used for realizing the functions of the parking management system server, judging whether the vehicle enters a parking lot area or not according to the position information of the parking management system mobile terminal, generating parking space recommendation information based on the occupation state information of the parking space, analyzing the image information of the vehicle to obtain the vehicle length and the vehicle width information so as to determine a parking reminding area related to the vehicle, sending a reminding message to the mobile terminal when the vehicle enters the parking reminding area, and monitoring the parking state of the vehicle;

the third module is used for realizing the function of the parking management system navigation end, and comprises the steps of acquiring the in-field position of the mobile end of the parking management system in real time and combining an electronic map in the parking field to generate indoor navigation information for the user vehicle, so that the user vehicle is guided to the parking space area selected by the user;

and the fourth module is used for realizing the functions of the mobile terminal of the parking management system, and comprises the functions of sending self position information, providing an interactive interface between a user and the parking management system, displaying parking space recommendation information and indoor navigation information of the user by the system, displaying a reminding message that the vehicle reaches a parking reminding area to the user, and displaying an alarm message when the vehicle is abnormal on the parking space.

7. A storage medium having stored therein instructions executable by the system of claim 6, wherein the instructions when executed by a processor comprised by the system of claim 6 are adapted to implement an automated intelligent parking management method of any of claims 1-5.

Technical Field

The invention belongs to the technical field of parking lot management, and particularly relates to an automatic intelligent parking management system and method.

Background

With the continuous acceleration of the urbanization process and the rapid increase of the motor vehicle holding amount, higher requirements are generated on the management level of the parking lot, the parking management system realizes the comprehensive management of the vehicles and the parking spaces in the parking lot by collecting the information of the access records, the positions in the parking lot and the like of different vehicles, however, under the traditional parking management system, a user still needs to search for a proper parking space in the parking lot, especially in large parking lots, this takes a certain amount of time, leaving the user unchanged for parking, and furthermore, for users with less sophisticated driving techniques, it is difficult to accurately park a vehicle in a parking space in a parking lot with limited space, however, in the conventional parking management system, guidance information is rarely provided for the user to park, and thus, research and construction of the intelligent parking management system and the management method are imperative.

Disclosure of Invention

Aiming at the technical problems, the invention provides an automatic intelligent parking management system and method, aiming at automatically recommending a proper parking space for a user by the system, avoiding the process of searching the parking space for the user, providing parking reminding information for the user when the user parks the vehicle and helping the user to quickly finish parking.

In order to achieve the above object, an automated intelligent parking management method is provided as follows, which is implemented by the following steps:

the method comprises the steps that firstly, position information of a mobile terminal of a parking management system is obtained, whether a user vehicle enters a parking lot area or not is judged according to the position information, when the user vehicle enters the parking lot area, an information acquisition terminal of the parking management system collects and uploads occupation state information of each parking space in the parking lot, and a service terminal of the parking management system generates parking space recommendation information based on the occupation state information of the parking spaces and sends the parking space recommendation information to the mobile terminal;

secondly, browsing the parking place recommendation information and selecting a final parking place on a mobile end of the parking management system by a user, and generating indoor navigation information for the user vehicle by a navigation end of the parking management system through acquiring the position in the parking lot of the mobile end in real time and combining an electronic map in the parking lot to guide the user vehicle to the parking place area selected by the user;

step three, the service end of the parking management system sends an instruction to the information acquisition end of the parking management system, so that the information acquisition end of the parking management system collects and uploads image information about a user vehicle, the service end obtains information about the length and width of the user vehicle by analyzing the image information and determines a parking reminding area about the user vehicle by combining with parking space information selected by a user, the service end also correspondingly generates a simulation image of the user vehicle on an electronic map in the parking lot based on the position of the user vehicle, and when the central position of the simulation image of the user vehicle enters the parking reminding area, a reminding message is sent to the mobile end of the parking management system;

and fourthly, after the user finishes parking, the information collection end of the parking management system continues to collect information of the parking space, wherein the information comprises image information and sensor information, the service end of the parking management system monitors the parking state of the user vehicle by analyzing the information of the parking space, and when the service end monitors that the user vehicle is abnormal, the service end sends an alarm message to the mobile end of the parking management system.

As a preferred technical solution of the present invention, in step three, based on the user vehicle information and in combination with the parking space information selected by the user, a parking reminding area of the user vehicle in the parking lot is determined, which further includes the following steps:

the method comprises the steps of firstly, acquiring an electronic map in a field and establishing a coordinate system, wherein the center of a parking space selected by a user is used as an original point, an X axis is generated along the direction of a parking road near the parking space, specifically, the driving direction of a vehicle is used as the positive direction of the X axis, a Y axis is generated along the direction vertical to the X axis, and specifically, the side where the road is located is used as the positive direction of the Y axis;

secondly, calculating the minimum turning radius of the user during parking, wherein the minimum turning radius represents the length of a parking space, represents the vehicle width of a vehicle, and represents the distance between the boundary of the parking space close to one side of the road and the boundary of the road close to one side of the parking space;

calculating the maximum turning radius of the user during parking, wherein the maximum turning radius represents the length of the parking space, the vehicle width of the vehicle, the distance between the boundary of one side, close to the road, of the parking space and the boundary of one side, close to the parking space, of the road, and the distance between the side edge, close to the parking space, of the vehicle and the boundary of one side, close to the parking space, of the road when the vehicle is located on the boundary of one side, far away from the parking space, of the road;

and fourthly, calculating the coordinate point of the central point of the vehicle on the parking road when the vehicle parks at the minimum turning radius, calculating the coordinate point of the central point of the vehicle on the parking road when the vehicle parks at the maximum turning radius, and constructing a rectangle by taking a connecting line between the central point and the coordinate point as a diagonal line, wherein the area limited by the rectangle is a parking reminding area.

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

the invention realizes that when a user vehicle enters the parking lot, the parking management system automatically recommends a proper parking space for the user, navigates the vehicle to the vicinity of the parking space selected by the user finally, sends a parking reminding message to the user in the process of parking the vehicle by the user, and the parking management system continues to monitor the parking state of the vehicle after the user finishes parking.

Drawings

FIG. 1 is a flow chart of the steps of an automated intelligent parking management method of the present invention;

fig. 2 is a flowchart illustrating steps of generating parking space recommendation information based on occupancy state information of a parking space according to the present invention;

FIG. 3 is a flowchart illustrating the steps of determining a parking alert area for a user's vehicle within a parking lot according to the present invention;

fig. 4 is a structural diagram of an automated intelligent parking management system according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms unless otherwise specified. These terms are only used to distinguish one element from another. For example, a first xx script may be referred to as a second xx script, and similarly, a second xx script may be referred to as a first xx script, without departing from the scope of the present application.

Referring to fig. 1, the present invention provides an automated intelligent parking management method, which is specifically implemented by performing the following steps:

the method comprises the steps that firstly, position information of a mobile terminal of the parking management system is obtained, whether a user vehicle enters a parking lot area or not is judged according to the position information, when the user vehicle enters the parking lot area, an information collection terminal of the parking management system collects and uploads occupation state information of each parking space in the parking lot, and a service terminal of the parking management system generates parking space recommendation information based on the occupation state information of the parking spaces and sends the parking space recommendation information to the mobile terminal.

And secondly, browsing the parking place recommendation information and selecting a final parking place on the mobile end of the parking management system by the user, and generating indoor navigation information for the user vehicle by the navigation end of the parking management system through acquiring the position in the parking lot of the mobile end in real time and combining an electronic map in the parking lot to guide the user vehicle to the parking place area selected by the user.

And step three, the service end of the parking management system sends an instruction to the information acquisition end of the parking management system, so that the information acquisition end of the parking management system collects and uploads image information about the user vehicle, the service end obtains information about the length and width of the user vehicle by analyzing the image information and determines a parking reminding area about the user vehicle by combining with parking space information selected by the user, the service end also correspondingly generates a simulation image of the user vehicle on an electronic map in the parking lot based on the position of the user vehicle, and when the central position of the simulation image of the user vehicle enters the parking reminding area, a reminding message is sent to the mobile end of the parking management system.

And fourthly, after the user finishes parking, the information collection end of the parking management system continues to collect information of the parking space, wherein the information comprises image information and sensor information, the service end of the parking management system monitors the parking state of the user vehicle by analyzing the information of the parking space, and when the service end monitors that the user vehicle is abnormal, the service end sends an alarm message to the mobile end of the parking management system.

Further, in step one, when considering that the user in the real life parks in the parking lot, first select to need to look for suitable parking stall in the parking lot, the user is in the in-process of selecting the parking stall, not only can consider the parking degree of difficulty in parking stall under the normal conditions, but also can consider whether can conveniently arrive the region that oneself wanted to go through the parking lot export that is close apart from the parking stall, finally synthesize the two results and select a suitable parking stall, and when parkking in the parking lot in the limited space, the parking degree of difficulty often is occupied with the parking stall in both sides of idle parking stall and is related.

Specifically, referring to fig. 2, in the first step, the parking space recommendation information is generated by the parking management system server based on the occupancy state information of the parking space, and the method further includes the following steps:

firstly, generating a candidate set of recommended parking spaces according to information of all unoccupied parking spaces, wherein the candidate set comprises unique number information of the parking spaces and outlet information corresponding to the parking spaces, and traversing different parking spaces in the candidate set in sequence.

And secondly, in the candidate set, setting the recommended priority of the independent parking spaces and the non-independent parking spaces with the vacant parking spaces at the left and right sides as high-level, setting the recommended priority of the non-independent parking spaces with the vacant parking spaces at the left and right sides as middle-level, and setting the recommended priority of the non-independent parking spaces with the vacant parking spaces at the left and right sides as low-level.

And thirdly, generating parking space recommendation information according to the candidate set of recommended parking spaces processed in the last step and the recommended priority of the parking spaces from high to low.

The exit information corresponding to the parking space in the first step specifically includes location information of a parking lot exit closest to the parking space location and related information of an area that can be reached by a user through the parking lot exit, such as a building name and a road name that can be reached through the parking lot exit, and the parking space recommendation information generated in the third step may include all parking spaces in the candidate set, and may also select some parking spaces in the candidate set with higher priority according to system requirements, which is not specifically limited in this embodiment.

Further, in the second step, the mobile terminal of the parking management system may display the parking space recommendation information automatically generated by the parking management system server to the user by generating a simulated image of the parking space or by text description, and simultaneously provide an operation interface for the user to interact with the parking management system, the user selects the last parking space on the interface, after the user selects the parking space, the navigation terminal of the parking management system acquires the position information of the mobile terminal in the parking lot in real time, and generates indoor navigation route information of the user vehicle by combining an electronic map in the parking lot, and sends the indoor navigation route information to the mobile terminal for displaying, so as to guide the user vehicle to an area near the parking space selected by the user, specifically, the real-time positioning of the mobile terminal may be realized by means of an indoor bluetooth positioning technology, the mobile terminal continuously transmits Beacon information, and the navigation terminal collects the Beacon information, and obtaining the real-time position coordinate of the mobile terminal through a positioning algorithm based on the known coordinate.

Furthermore, in the third step, considering that for a user with a less mature driving technology, it is difficult to accurately and quickly park a vehicle into a parking space on a parking road with a limited space, the user generally needs to find a proper position through multiple attempts to start the vehicle parking operation, and if a prompt that the vehicle parking operation can be performed is sent to the user when the vehicle of the user enters a designated area, the difficulty of parking of the user is reduced, and the parking time of the user is shortened.

Specifically, in the third step, the service end of the parking management system obtains the length and width information of the user vehicle by analyzing the image information of the user vehicle, and the process includes using an image recognition technology to the image information of the user vehicle to obtain a recognition result about the brand and the model of the user vehicle, and searching the prestored length and width information of the corresponding vehicle from the vehicle database according to the brand and the model of the user vehicle. Because vehicles of different brands and models are different in appearance such as vehicle types, vehicle body colors, vehicle logos and the like, the brands and the models of the vehicles can be recognized from images of the vehicles through an image recognition technology, the images of the vehicles can be obtained through a camera or a video device installed in a parking lot, and the image recognition technology is developed more mature and is not repeated in the embodiment.

Specifically, referring to fig. 3, in step three, based on the user vehicle information and in combination with the parking space information selected by the user, a parking reminding area of the user vehicle in the parking lot is determined, which further includes the following steps:

the method comprises the steps of firstly, obtaining an electronic map in a field and establishing a coordinate system, wherein the center of a parking space selected by a user is used as an original point, an X axis is generated along the direction of a parking road near the parking space, specifically, the driving direction of a vehicle is used as the positive direction of the X axis, a Y axis is generated along the direction vertical to the X axis, and specifically, the side where the road is located is used as the positive direction of the Y axis.

And secondly, calculating the minimum turning radius of the user when parking, wherein the minimum turning radius represents the length of the parking space, the vehicle width of the vehicle and the distance between the boundary of the parking space close to the road and the boundary of the road close to the parking space.

And thirdly, calculating the maximum turning radius of the user during parking, wherein the maximum turning radius represents the length of the parking space, the vehicle width of the vehicle, the distance between the boundary of one side, close to the road, of the parking space and the boundary of one side, close to the parking space, of the road, and the distance between the side edge, close to the parking space, of the vehicle and the boundary of one side, close to the parking space, of the road when the vehicle is positioned on the boundary of one side, far away from the parking space, of the road.

And fourthly, calculating the coordinate point of the central point of the vehicle on the parking road when the vehicle parks at the minimum turning radius, calculating the coordinate point of the central point of the vehicle on the parking road when the vehicle parks at the maximum turning radius, and constructing a rectangle by taking a connecting line between the central point and the coordinate point as a diagonal line, wherein the area limited by the rectangle is a parking reminding area.

Wherein when the minimum turning radius and the maximum turning radius of the user during parking are calculated, the process that the vehicle of the user moves from the parking road to the parking space is regarded as that the vehicle performs one-fourth circular motion, the position of the center of the vehicle when the vehicle starts to perform warehousing operation on the parking road, and the central positions of the parking spaces are respectively used as two end points of the arc lines corresponding to the quarter circle, and the circle center is positioned on the positive X half shaft, the corresponding coordinate position is the position of the vehicle center when the vehicle is closest to the parking space on the parking road and can carry out warehousing operation, the corresponding coordinate position is the position of the center of the vehicle when the vehicle is farthest away from the parking space on the parking road and can perform warehousing operation, therefore, in the range of a rectangular area with the connecting line between the two sides as the diagonal line, the user can complete the parking operation more easily and quickly.

Further, in the fourth step, after the user vehicle has been accurately parked in the parking space, the parking management system information collection end continues to continuously collect the information on the user parking space, and uploads the collected information to the parking management system server for analysis, and when the server analyzes that the user vehicle is abnormal, the server sends an alarm message to the user through the parking management system mobile end, where the information on the user parking space includes image information and sensor information on the parking space. The parking space monitoring system comprises a parking space monitoring system, a server and a vehicle monitoring system, wherein the parking space monitoring system is used for monitoring the vehicle image, the vehicle monitoring system is used for monitoring the vehicle image, the server is used for monitoring the vehicle image, the vehicle monitoring system is used for monitoring the vehicle image, and the vehicle monitoring system is used for monitoring the vehicle image.

In summary, according to the automated intelligent parking management system and method of the present invention, first, a service end of the parking management system generates parking space recommendation information for a user based on occupancy state information of parking spaces in a parking lot, and then a navigation end of the parking management system generates an indoor navigation route guiding a vehicle to a vicinity of a parking space selected by the user by acquiring a location in the parking lot of a mobile end of the parking management system and combining with an electronic map in the parking lot; secondly, the server obtains the vehicle width information by analyzing the vehicle image and determines a parking reminding area related to the vehicle by combining with the parking space information, and when the vehicle enters the parking reminding area, a reminding message is sent to the user; and finally, when the user finishes parking, the server side monitors the parking state of the vehicle by analyzing the images and the sensor information on the parking spaces collected by the information acquisition end of the parking management system.

Referring to fig. 4, the present invention further provides an automated intelligent parking management system, which is used to implement the above-described automated intelligent parking management method, and specifically includes the following modules:

the system comprises a first module, a second module and a third module, wherein the first module is used for realizing the functions of an information acquisition end of a parking management system, and comprises the steps of collecting and uploading the occupation state information of each parking space in a parking lot, collecting and uploading image information related to a user vehicle, and collecting and uploading the image information and sensor information related to the parking space;

the second module is used for realizing the function of a parking management system server, judging whether a vehicle enters a parking lot area or not according to the position information of a parking management system mobile terminal, generating parking space recommendation information based on the occupation state information of the parking space, analyzing the image information of the vehicle to obtain the vehicle length and the vehicle width information so as to determine a parking reminding area related to the vehicle, sending a reminding message to the mobile terminal when the vehicle enters the parking reminding area, and monitoring the parking state of the vehicle;

the third module is used for realizing the function of the parking management system navigation end, and comprises the steps of acquiring the in-field position of the mobile end of the parking management system in real time and combining an electronic map in the parking field to generate indoor navigation information for the user vehicle, so that the user vehicle is guided to the parking space area selected by the user;

and the fourth module is used for realizing the functions of the mobile terminal of the parking management system, and comprises the functions of sending self position information, providing an interactive interface between a user and the parking management system, displaying parking space recommendation information and indoor navigation information of the user by the system, displaying a reminding message that the vehicle reaches a parking reminding area to the user, and displaying an alarm message when the vehicle is abnormal on the parking space.

The system includes a storage medium storing instructions executable by the system for implementing an automated intelligent parking management method when executed by a processor included in the system.

It should be understood that, although the steps in the flowcharts of the embodiments of the present invention are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in various embodiments may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.