阅读说明：本技术 基于物联网电动滑板车转向灯自动控制方法及电动滑板车 (Internet of things-based electric scooter steering lamp automatic control method and electric scooter ) 是由 刘玉冰 黄振祥 于 2021-11-01 设计创作，主要内容包括：本发明涉及物联网技术领域,特别涉及一种基于物联网电动滑板车转向灯自动控制方法及电动滑板车,所述基于物联网电动滑板车转向灯自动控制方法包括以下步骤：启动传感器集群监控滑板车的工作状态,并保持至少一个传感器处于工作状态；当传感器集群全部唤醒时,创建动态侦测线程以确定电动滑板车转弯模式；根据所述电动滑板车转弯模式确定预设转弯距离,当距转弯点的距离小于所述预设转弯距离时,执行偏转角度检测；检测结果满足预设值,获取电动滑板车的动力输出参数,根据获取的所述动力输出参数控制转向灯亮灭。本发明通过传感器集群进行转弯前检测,通过云端数据预设转弯距离,检测到偏转角度达到设定值后控制转向灯闪烁以提醒行人和车辆。(The invention relates to the technical field of Internet of things, in particular to an automatic control method for a steering lamp of an electric scooter based on Internet of things and the electric scooter, wherein the automatic control method for the steering lamp of the electric scooter based on Internet of things comprises the following steps: starting a sensor cluster to monitor the working state of the scooter and keeping at least one sensor in the working state; when the sensor cluster is completely awakened, a dynamic detection thread is established to determine the turning mode of the electric scooter; determining a preset turning distance according to the turning mode of the electric scooter, and executing deflection angle detection when the distance from a turning point is less than the preset turning distance; and if the detection result meets a preset value, acquiring power output parameters of the electric scooter, and controlling the turn lights to be on or off according to the acquired power output parameters. According to the invention, the sensor cluster is used for detecting before turning, the turning distance is preset through cloud data, and the steering lamp is controlled to flicker to remind pedestrians and vehicles after the deflection angle is detected to reach a set value.)

1. The automatic control method for the steering lamp of the electric scooter based on the Internet of things is characterized by comprising the following steps of:

starting a sensor cluster to monitor the working state of the scooter and keeping at least one sensor in the working state;

when the sensor cluster is completely awakened, a dynamic detection thread is established to determine the turning mode of the electric scooter;

determining a preset turning distance according to the turning mode of the electric scooter, and executing deflection angle detection when the distance from a turning point is less than the preset turning distance;

and if the detection result meets a preset value, acquiring power output parameters of the electric scooter, and controlling the turn lights to be on or off according to the acquired power output parameters.

2. The automatic control method for the steering lamp of the electric scooter based on the internet of things according to claim 1, wherein the starting sensor cluster monitors the working state of the scooter and keeps at least one sensor in the working state, and the method comprises the following steps:

starting an acceleration sensor detection thread: when the offset between the value acquired by the acceleration sensor and the X-axis direction is more than 50% of the average offset, the difference between the values of the acceleration sensor in two milliseconds before and after the acceleration sensor is acquired,

if the difference value is larger than the set threshold value, the detection thread of the acceleration sensor is kept, and the detection thread of the gyroscope sensor is started: when the offset between the numerical value acquired by the gyroscope sensor and the X-axis direction is larger than a set threshold, acquiring the average value of the left and right direction numbers of the gyroscope sensor in the front and back five milliseconds and making a difference,

if the difference is smaller than the set threshold value, setting the gyroscope sensor to be in a dormant state,

otherwise, keeping the detection thread of the gyroscope sensor, and starting the detection thread of the gravity sensor: when the offset between the value acquired by the gravity sensor and the X-axis direction is larger than the minimum human body weight at the cloud end, the difference between the values of the gravity sensor in two milliseconds before and after the acquisition,

if the difference is smaller than the set threshold value, setting the gravity sensor to be dormant,

otherwise, keeping the gravity sensor to detect the thread.

3. The automatic control method for the steering lamp of the electric scooter based on the internet of things according to claim 1, wherein the creating of the dynamic detection thread for determining the turning mode of the electric scooter comprises the following steps:

acquiring the number of traffic lights and intersections in a target track path of a cloud map;

and setting the electric scooter into a high-frequency turning mode or a low-frequency turning mode according to the traffic lights and the ratio of the number of the intersections to the path length.

4. The Internet of things-based automatic control method for the steering lamp of the electric scooter according to claim 3, wherein the step of determining the preset turning distance according to the turning mode of the electric scooter specifically comprises the following steps:

acquiring the pedestrian flow density of a traffic light or intersection closest to the advancing direction in a target track path of the cloud map;

and determining a safe braking distance according to the people flow density, and determining a pre-turning distance by taking the safe braking distance as a reference.

5. The Internet of things-based automatic control method for the steering lamp of the electric scooter according to claim 1, wherein the deflection angle detection is executed, and the method specifically comprises the following steps:

and acquiring the deflection angle of the gyroscope sensor, and if the left turning range is within the range of 0-60 degrees or the right turning range is within the range of 90-120 degrees, determining the brightness output of the steering lamp according to the turning angle and controlling the steering lamp to pre-turn and flash.

6. The Internet of things-based automatic control method for the steering lamp of the electric scooter according to claim 1, wherein the deflection angle detection is executed, and the method specifically comprises the following steps:

and acquiring the deflection angle of the gravity sensor, and if the left gravity deflection is greater than 1/3 of the mean value or the right gravity deflection is greater than 1/2 of the mean value, determining the brightness output of the turn signal lamp according to the percentage of the gravity deflection, and controlling the turn signal lamp to pre-turn and flash.

7. The automatic control method for the steering lamp of the electric scooter based on the internet of things according to claim 1, wherein power output parameters of the electric scooter are obtained, and the steering lamp is controlled to be turned on or off according to the obtained power output parameters, and the method specifically comprises the following steps:

acquiring a power output difference value before and after turning of the electric scooter;

when the difference value is negative, keeping the pre-turning flicker of the steering lamp;

and if the difference is positive, improving the brightness and the flicker frequency of the turn light according to the percentage of the current power output to the maximum power output.

8. The automatic control method for the steering lamp of the electric scooter based on the internet of things as claimed in claim 1, wherein the automatic control method for the steering lamp of the electric scooter based on the internet of things further comprises the following steps:

the method comprises the steps of recording turning information and uploading the turning information to a cloud end for the scooter passing through the current area to be called and executed, wherein the turning information comprises turning coordinates, turning time, a turning mode and the model of the electric scooter.

9. The automatic control method for the steering lamp of the electric scooter based on the internet of things as claimed in claim 1, wherein the automatic control method for the steering lamp of the electric scooter based on the internet of things further comprises the following steps:

and (4) acquiring turning coordinates, the number of times of flashing lights and the turning time, and uploading to a display device for display.

10. The utility model provides an electric scooter, its characterized in that, electric scooter includes:

a scooter body;

a control module, configured to execute the method for automatically controlling the steering lamp of the electric scooter based on internet of things according to any one of claims 1 to 9; and

and the communication module is connected with the control module and used for acquiring cloud data required by turning operation.

Technical Field

The invention relates to the technical field of Internet of things, in particular to an automatic control method for a steering lamp of an electric scooter based on the Internet of things and the electric scooter.

Background

The turn signal lights are turned on when the vehicle turns, and generally comprise a left turn signal light and a right turn signal light, so that the aim of prompting the left and right vehicles and pedestrians to pay attention to the turning action is fulfilled, and accidents are avoided. The steering lamp is generally a xenon lamp tube and is controlled by a single chip microcomputer. The turn signal lamp usually adopts a flasher to realize the light flicker, and can be divided into a resistance wire type, a capacitance type and an electronic type according to the light emitting principle.

The electric scooter is rapidly developed in recent years, and the entertainment supplies are changed into convenient traffic work for traveling, so that the electric scooter is pursued by young groups. Electric scooter is nimble convenient, generally uses the pavement, and the pavement is gone up vehicle and is less, and pedestrian's vigilance nature is not high, causes danger easily.

In the prior art, a warning lamp arranged on an electric scooter is usually of a reflection type, cannot be controlled independently, is reflected by irradiated light to emit light, and belongs to passive reminding. This is not in accordance with the particular reality of electric scooters that are high in speed and often travel on crowded sidewalks, and needs improvement.

Disclosure of Invention

Therefore, it is necessary to provide an automatic control method for a steering lamp of an electric scooter based on the internet of things and an electric scooter, aiming at the above problems.

The embodiment of the invention is realized in such a way that the automatic control method of the steering lamp of the electric scooter based on the Internet of things comprises the following steps:

starting a sensor cluster to monitor the working state of the scooter and keeping at least one sensor in the working state;

when the sensor cluster is completely awakened, a dynamic detection thread is established to determine the turning mode of the electric scooter;

determining a preset turning distance according to the turning mode of the electric scooter, and executing deflection angle detection when the distance from a turning point is less than the preset turning distance;

and if the detection result meets a preset value, acquiring power output parameters of the electric scooter, and controlling the turn lights to be on or off according to the acquired power output parameters.

In one embodiment, the present invention provides an electric scooter comprising:

a scooter body;

the control module is used for executing the automatic control method for the steering lamp of the electric scooter based on the Internet of things in the embodiment of the invention; and

and the communication module is connected with the control module and used for acquiring cloud data required by turning operation.

According to the method provided by the embodiment of the invention, the sensor cluster is used for detecting before turning, the turning distance is preset through cloud data, and the turning lamp is controlled to flicker to remind pedestrians and vehicles after the deflection angle reaches the set value. The control of the sensor cluster not only keeps the system processing detection state at all times, but also can control the work of other sensors according to the detection of a single sensor, thereby saving computing resources; the preset turning distance is determined by using the cloud data, so that the turning distance is combined with the environment of the current scene, the turning operation is more flexible, and the influence of mechanical turning on the normal running of pedestrians or vehicles is avoided; the turn signal lamp is controlled to be on or off according to the power output parameters, so that the turn signal lamp flickers to reflect the speed of turning action, a real-time prompt effect is achieved, the danger early warning effect is improved, attention of pedestrians and vehicles is easy to be paid, and danger is reduced.

Drawings

Fig. 1 is a logic diagram of an automatic control method for a steering lamp of an electric scooter based on the internet of things according to an embodiment of the invention;

fig. 2 is a block diagram of an electric scooter according to an embodiment of the present invention;

FIG. 3 is a block diagram showing an internal configuration of a computer device according to an embodiment.

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 disclosure.

As shown in fig. 1, in an embodiment, an automatic control method for a steering lamp of an electric scooter based on the internet of things is provided, which specifically includes the following steps:

starting a sensor cluster to monitor the working state of the scooter and keeping at least one sensor in the working state;

when the sensor cluster is completely awakened, a dynamic detection thread is established to determine the turning mode of the electric scooter;

determining a preset turning distance according to the turning mode of the electric scooter, and executing deflection angle detection when the distance from a turning point is less than the preset turning distance;

and if the detection result meets a preset value, acquiring power output parameters of the electric scooter, and controlling the turn lights to be on or off according to the acquired power output parameters.

In the embodiment of the invention, the sensor cluster is composed of a plurality of sensors of different types, each sensor is connected with the control device, the control device controls the work of the whole sensor assembly through data processing operation acquired by each sensor, and the control device can be a control system of the power scooter. In the embodiment of the invention, the control device judges whether the electric scooter enters a turning preparation stage according to the linkage of the working state of the sensor, so that the prediction accuracy of the method can be improved.

In the embodiment of the invention, the turning mode is determined through the dynamic detection thread, and different preset turning distances are determined according to the turning mode, wherein the turning distance refers to the distance for the electric scooter to start to prepare for turning.

In the embodiment of the invention, after the electric scooter enters the state of preparing for turning, the electric scooter detects the angle deflection, when the angle deflection reaches the preset value, the power output parameter of the electric scooter is obtained, and the parameters such as the frequency, the brightness and the like of the turn lights are dynamically controlled according to the parameter, so that pedestrians or vehicles can be better reminded.

According to the method provided by the embodiment of the invention, the sensor cluster is used for detecting before turning, the turning distance is preset through cloud data, and the turning lamp is controlled to flicker to remind pedestrians and vehicles after the deflection angle reaches the set value. The control of the sensor cluster not only keeps the system processing detection state at all times, but also can control the work of other sensors according to the detection of a single sensor, thereby saving computing resources; the preset turning distance is determined by using the cloud data, so that the turning distance is combined with the environment of the current scene, the turning operation is more flexible, and the influence of mechanical turning on the normal running of pedestrians or vehicles is avoided; the turn signal lamp is controlled to be on or off according to the power output parameters, so that the turn signal lamp flickers to reflect the speed of turning action, a real-time prompt effect is achieved, the danger early warning effect is improved, attention of pedestrians and vehicles is easy to be paid, and danger is reduced.

In an embodiment of the present invention, the starting sensor cluster monitors the working state of the scooter, and keeps at least one sensor in the working state, including the following steps:

starting an acceleration sensor detection thread: when the offset between the value acquired by the acceleration sensor and the X-axis direction is more than 50% of the average offset, the difference between the values of the acceleration sensor in two milliseconds before and after the acceleration sensor is acquired,

if the difference value is larger than the set threshold value, the detection thread of the acceleration sensor is kept, and the detection thread of the gyroscope sensor is started: when the offset between the numerical value acquired by the gyroscope sensor and the X-axis direction is larger than a set threshold, acquiring the average value of the left and right direction numbers of the gyroscope sensor in the front and back five milliseconds and making a difference,

if the difference is smaller than the set threshold value, setting the gyroscope sensor to be in a dormant state,

otherwise, keeping the detection thread of the gyroscope sensor, and starting the detection thread of the gravity sensor: when the offset between the value acquired by the gravity sensor and the X-axis direction is larger than the minimum human body weight at the cloud end, the difference between the values of the gravity sensor in two milliseconds before and after the acquisition,

if the difference is smaller than the set threshold value, setting the gravity sensor to be dormant,

otherwise, keeping the gravity sensor to detect the thread.

In the embodiment of the invention, the X axis in the acceleration sensor refers to the forward direction of the electric scooter, the offset can be specifically represented by an offset angle, and the average offset is determined by comparing the sum of the offset in the non-turning state within a statistical period with the statistical number, and is used for measuring the normal offset during the running of the electric scooter. Acquiring the difference between the values of the acceleration sensor in two milliseconds before and after the acceleration sensor, and repeating the process; if the difference value does not meet the set value, other operations are not executed, and the current detection state is kept; if the set value is met, starting a gyroscope sensor detection thread, and detecting by using a gyroscope; similarly, when the difference value between the average value of the first five milliseconds and the average value of the last five milliseconds detected by the gyroscope reaches a set threshold value, the gravity sensor detection thread is started, otherwise, the gyroscope sensor is dormant. The detection process of the gravity sensor is similar to that of the acceleration sensor and the gyroscope sensor, and the embodiment of the invention is not repeated.

In the embodiment of the invention, the change of the acceleration is detected by the acceleration sensor, wherein the change of the acceleration can be a positive value or a negative value; by the gyro sensor, a change in direction is detected; what detected through gravity sensor is electric scooter's atress change, and the reality is because the change of the size of the effect of power between speed change user and the scooter. The invention comprehensively judges the occurrence of the turning action by the sensor cluster formed by the three components, thereby improving the pre-installation accuracy of the system; it will of course be appreciated that as a simplified solution, a single type of detection decision may be used, and this is also an alternative implementation of the invention.

In an embodiment of the present invention, the creating a dynamic detection thread to determine a turning mode of the electric scooter includes the following steps:

acquiring the number of traffic lights and intersections in a target track path of a cloud map;

and setting the electric scooter into a high-frequency turning mode or a low-frequency turning mode according to the traffic lights and the ratio of the number of the intersections to the path length.

In the embodiment of the invention, when the appearance frequency of red and green lights or intersections is high (for example, when one appears in the length of 300m on average), the electric scooter system automatically enters a high-frequency turning mode, the sensor cluster is kept on, and the electric scooter detects the environmental conditions in real time. In the embodiment of the invention, the related data of the cloud map can be acquired through a navigation program or short-distance communication with the intelligent terminal.

In an embodiment of the present invention, the determining a preset turning distance according to the turning mode of the electric scooter specifically includes the following steps:

acquiring the pedestrian flow density of a traffic light or intersection closest to the advancing direction in a target track path of the cloud map;

and determining a safe braking distance according to the people flow density, and determining a pre-turning distance by taking the safe braking distance as a reference.

In the embodiment of the invention, the people stream density can be obtained through the live-action image provided by the cloud server, the live-action image can be obtained through the live camera, and also can be obtained through the satellite image, which is provided by the server. In the embodiment of the invention, the braking safe distance is a safe distance kept when the electric scooter is close to a person or an object, and when the person or the object appears in the distance, the system executes the operation of automatic braking or speed reduction or speed increase limitation; further, before the electric scooter reaches the turning point, i.e. enters the state to be turned, the electric scooter starts to slowly speed up, changes direction, etc., and the distance between the point entering the turning state and the turning point is based on the safe braking distance, preferably an integral multiple of the safe braking distance.

In an embodiment of the present invention, the performing deflection angle detection specifically includes the following steps:

and acquiring the deflection angle of the gyroscope sensor, and if the left turning range is within the range of 0-60 degrees or the right turning range is within the range of 90-120 degrees, determining the brightness output of the steering lamp according to the turning angle and controlling the steering lamp to pre-turn and flash.

In the embodiment of the invention, the electric scooter runs to the right, the turning range to the right is often larger, and for small turning to the right, the influence is smaller because the electric scooter runs at the same side as the electric scooter, and the steering lamp can be selectively turned on according to the setting of a user; for left turn, the smaller turn of the left turn needs to attract the attention of pedestrians or vehicles when the main road for driving is changed, so the triggering angle is smaller. In the embodiment of the present invention, the brightness output of the turn signal is determined according to the converted angle, and it should be noted that the angle is a relative angle: for right turning, when 90 degrees is taken as an early warning starting angle, the brightness of the steering lamp is distributed between 90 degrees and a right turning limit, a user sets a selective turning-on prompt when the brightness is less than 90 degrees, and the brightness of the steering lamp is proportionally adjusted when the brightness is more than 90 degrees; for left turn, when the early warning starting angle is 0 degree, the brightness of the steering lamp is distributed between 0 degree and the left turning limit, the brightness is the lowest brightness when the angle is 0 degree, and the brightness is the highest brightness when the angle is the left turning limit. In addition, the above rule is also applicable to the frequency control of the turn signal lamp flicker, namely, the frequency of the turn signal lamp flicker is adjusted according to the size of the turn angle; the larger the steering angle, the higher the frequency of the flashing of the turn signal.

In an embodiment of the present invention, the performing deflection angle detection specifically includes the following steps:

and acquiring the deflection angle of the gravity sensor, and if the left gravity deflection is greater than 1/3 of the mean value or the right gravity deflection is greater than 1/2 of the mean value, determining the brightness output of the turn signal lamp according to the percentage of the gravity deflection, and controlling the turn signal lamp to pre-turn and flash.

In the embodiment of the present invention, as in the previous embodiment, the different bias of gravity is related to steering, and the influence of left steering is greater than that of right steering, so that the two have different triggering values. Either gravity deflection triggering or angular deflection triggering, either alone or in combination, may be utilized.

In one embodiment of the present invention, obtaining a power output parameter of an electric scooter, and controlling a turn signal lamp to turn on or off according to the obtained power output parameter specifically includes the following steps:

acquiring a power output difference value before and after turning of the electric scooter;

when the difference value is negative, keeping the pre-turning flicker of the steering lamp;

and if the difference is positive, improving the brightness and the flicker frequency of the turn light according to the percentage of the current power output to the maximum power output.

In the embodiment of the invention, before and after the turning action is executed, if the power output difference value of the system is negative or 0, the electric scooter is in the uniform or deceleration turning process, and the prompt of the transfer lamp at the moment is only limited to the original pre-turning prompt; otherwise, the brightness output and the frequency output of the turn signal lamp are increased proportionally according to the power increase value.

In an embodiment of the invention, the automatic control method for the steering lamp of the electric scooter based on the internet of things further comprises the following steps:

the method comprises the steps of recording turning information and uploading the turning information to a cloud end for the scooter passing through the current area to be called and executed, wherein the turning information comprises turning coordinates, turning time, a turning mode and the model of the electric scooter.

In the embodiment of the invention, for the turning of a specific intersection or a traffic light, the electric scooter can execute the turning program to record and upload, and then can automatically download the turning program to execute the turning and the control process of the steering light when passing through the position again in a similar time period. Of course, the data packet can be called by other electric scooters, and the turning data sharing based on the position is realized. The server can also construct an interpolation program of any time point all day according to different time of the uploaded data, and generate turning and steering lamp control program parameters of each time point.

In an embodiment of the invention, the automatic control method for the steering lamp of the electric scooter based on the internet of things further comprises the following steps:

and (4) acquiring turning coordinates, the number of times of flashing lights and the turning time, and uploading to a display device for display.

As shown in fig. 2, an embodiment of the present invention also provides an electric scooter, including:

a scooter body;

the control module is used for executing the automatic control method for the steering lamp of the electric scooter based on the Internet of things in the embodiment of the invention; and

and the communication module is connected with the control module and used for acquiring cloud data required by turning operation.

In the embodiment of the invention, the scooter body can be any type of scooter on the market, and the invention does not relate to the improvement of the structure of the scooter. For the control module, the specific execution method refers to the automatic control method for the steering lamp of the electric scooter based on the internet of things provided by the embodiment of the invention, and details are not repeated herein. The communication module may be a communication unit connected to the internet, or may be a short-range communication unit connected to a device such as an intelligent terminal, which is an optional specific implementation manner.

FIG. 3 is a diagram illustrating an internal structure of a computer device in one embodiment. As shown in fig. 3, the computer apparatus includes a processor, a memory, a network interface, an input device, and a display screen connected through a system bus. Wherein the memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system and also stores a computer program, and when the computer program is executed by the processor, the processor can realize the automatic control method of the steering lamp of the electric scooter based on the internet of things, which is provided by the embodiment of the invention. The internal memory can also store a computer program, and when the computer program is executed by the processor, the processor can execute the method for automatically controlling the steering lamp of the electric scooter based on the internet of things provided by the embodiment of the invention. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.

Those skilled in the art will appreciate that the configuration shown in fig. 3 is a block diagram of only a portion of the configuration associated with aspects of the present invention and is not intended to limit the computing devices to which aspects of the present invention may be applied, and that a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, a computer device is proposed, the computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:

starting a sensor cluster to monitor the working state of the scooter and keeping at least one sensor in the working state;

when the sensor cluster is completely awakened, a dynamic detection thread is established to determine the turning mode of the electric scooter;

determining a preset turning distance according to the turning mode of the electric scooter, and executing deflection angle detection when the distance from a turning point is less than the preset turning distance;

and if the detection result meets a preset value, acquiring power output parameters of the electric scooter, and controlling the turn lights to be on or off according to the acquired power output parameters.

In one embodiment, a computer readable storage medium is provided, having a computer program stored thereon, which, when executed by a processor, causes the processor to perform the steps of:

starting a sensor cluster to monitor the working state of the scooter and keeping at least one sensor in the working state;

when the sensor cluster is completely awakened, a dynamic detection thread is established to determine the turning mode of the electric scooter;

determining a preset turning distance according to the turning mode of the electric scooter, and executing deflection angle detection when the distance from a turning point is less than the preset turning distance;

and if the detection result meets a preset value, acquiring power output parameters of the electric scooter, and controlling the turn lights to be on or off according to the acquired power output parameters.

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 can include the processes of the embodiments of the methods described above when the program is executed. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. 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 embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within 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.