阅读说明：本技术 车辆的电制动控制方法、装置及电动车辆 (Electric brake control method and device for vehicle and electric vehicle ) 是由 刘琳 章友京 武科 陈光飞 曾羽飞 蒋炜 沙文瀚 于 2021-01-25 设计创作，主要内容包括：本申请公开了一种车辆的电制动控制方法、装置及车辆,其中,方法包括：检测车辆是否进入滑行工况；若车辆进入滑行工况,则检测车辆的实际加速度或者实际减速度；根据实际加速度或者实际减速度匹配当前所处制动区间,并根据当前所处制动区间确定的目标电能制动强度,以在制动回收能量的同时,基于目标电能制动强度控制驱动电机进行电制动。由此,解决了目前电制动调节的便捷性与准确差,导致制动的安全性与能量回收率较低等问题。(The application discloses electric brake control method and device of a vehicle and the vehicle, wherein the method comprises the following steps: detecting whether the vehicle enters a sliding working condition or not; if the vehicle enters a sliding working condition, detecting the actual acceleration or the actual deceleration of the vehicle; and matching the current braking interval according to the actual acceleration or the actual deceleration, and controlling the driving motor to perform electric braking based on the target electric braking intensity according to the target electric braking intensity determined by the current braking interval when the energy is recovered through braking. Therefore, the problems that the safety and the energy recovery rate of braking are low and the like caused by poor convenience and accuracy of the conventional electric brake regulation are solved.)

1. An electric brake control method of a vehicle, characterized by comprising the steps of:

detecting whether the vehicle enters a sliding working condition or not;

if the vehicle enters the coasting working condition, detecting the actual acceleration or the actual deceleration of the vehicle; and

and matching the current braking interval according to the actual acceleration or the actual deceleration, and controlling a driving motor to perform electric braking based on the target electric braking intensity according to the target electric braking intensity determined by the current braking interval when energy is recovered through braking.

2. The method of claim 1, wherein said controlling a drive motor to electrically brake based on said target electrical braking intensity comprises:

if the current braking interval is a normal road surface braking interval, performing electric braking based on first electric energy braking intensity;

if the current braking interval is a downhill road braking interval, performing electric braking based on second electric braking intensity, wherein the second electric braking intensity is greater than the first electric braking intensity;

and if the current braking interval is an uphill road braking interval, performing electric braking based on third electric energy braking intensity, wherein the third electric energy braking intensity is smaller than the first electric energy braking intensity.

3. The method of claim 1, wherein the detecting whether the vehicle enters a coasting condition comprises:

detecting the opening degrees of an accelerator pedal and a brake pedal of a vehicle;

judging whether the opening degrees of the accelerator pedal and the brake pedal are both smaller than an opening degree threshold value;

and when the opening degrees of the accelerator pedal and the brake pedal are both smaller than an opening degree threshold value, determining that the vehicle enters a sliding working condition.

4. The method of claim 3, further comprising:

and when the opening degree of any one of the accelerator pedal and the brake pedal is larger than or equal to the opening degree threshold value, the sliding working condition is quitted.

5. An electric brake control apparatus of a vehicle, characterized by comprising:

the first detection module is used for detecting whether the vehicle enters a sliding working condition or not;

the second detection module is used for detecting the actual acceleration or the actual deceleration of the vehicle when the vehicle enters the coasting working condition; and

and the control module is used for matching the current braking interval according to the actual acceleration or the actual deceleration and controlling the driving motor to perform electric braking based on the target electric energy braking intensity according to the target electric energy braking intensity determined by the current braking interval when the energy is recovered through braking.

6. The apparatus of claim 5, wherein the control module comprises:

the first control unit is used for carrying out electric braking based on first electric energy braking intensity when the current braking interval is a normal road surface braking interval;

the second control unit is used for carrying out electric braking based on second electric braking strength when the current braking section is a downhill road braking section, wherein the second electric braking strength is greater than the first electric braking strength;

and the third control unit is used for performing electric braking based on third electric energy braking intensity when the current braking interval is an uphill road braking interval, wherein the third electric energy braking intensity is smaller than the first electric energy braking intensity.

7. The apparatus of claim 5, wherein the first detection module comprises:

the detection unit is used for detecting the opening degrees of an accelerator pedal and a brake pedal of the vehicle;

the judging unit is used for judging whether the opening degrees of the accelerator pedal and the brake pedal are both smaller than an opening degree threshold value;

and the determining unit is used for determining that the vehicle enters a sliding working condition when the opening degrees of the accelerator pedal and the brake pedal are both smaller than an opening degree threshold value.

8. The apparatus of claim 7, further comprising:

and the working condition exit module is used for exiting the sliding working condition when the opening degree of any one of the accelerator pedal and the brake pedal is larger than or equal to the opening degree threshold value.

9. An electric vehicle characterized by comprising an electric brake control apparatus of the vehicle according to any one of claims 5 to 8.

Technical Field

The application relates to the technical field of new energy automobiles, in particular to an electric braking control method and device of a vehicle and an electric vehicle.

Background

The electric brake is an effect that the electric vehicle realizes braking by using negative torque generated by the motor, can reduce the dependence on mechanical brake when the vehicle brakes, reduces mechanical loss and can realize energy recovery.

However, at present, the braking force of the electric brake is often manually adjusted by a driver, so that the adjustment convenience is poor, the adjustment accuracy is poor, the safety of the brake is reduced, more energy is converted into heat energy during the brake, and the energy recovery rate is reduced.

Content of application

The application provides an electric brake control method and device of a vehicle and an electric vehicle, and aims to solve the problems that the safety and the energy recovery rate of braking are low and the like due to poor convenience and accuracy of the conventional electric brake regulation.

An embodiment of a first aspect of the present application provides an electric brake control method for a vehicle, including the following steps: detecting whether the vehicle enters a sliding working condition or not; if the vehicle enters the coasting working condition, detecting the actual acceleration or the actual deceleration of the vehicle; and matching the current braking interval according to the actual acceleration or the actual deceleration, and controlling a driving motor to perform electric braking based on the target electric braking intensity according to the target electric braking intensity determined by the current braking interval when energy is recovered through braking.

Further, the controlling the driving motor to perform electric braking based on the target electric braking intensity includes: if the current braking interval is a normal road surface braking interval, performing electric braking based on first electric energy braking intensity; if the current braking interval is a downhill road braking interval, performing electric braking based on second electric braking intensity, wherein the second electric braking intensity is greater than the first electric braking intensity; and if the current braking interval is an uphill road braking interval, performing electric braking based on third electric energy braking intensity, wherein the third electric energy braking intensity is smaller than the first electric energy braking intensity.

Further, the detecting whether the vehicle enters the coasting condition includes: detecting the opening degrees of an accelerator pedal and a brake pedal of a vehicle; judging whether the opening degrees of the accelerator pedal and the brake pedal are both smaller than an opening degree threshold value; and when the opening degrees of the accelerator pedal and the brake pedal are both smaller than an opening degree threshold value, determining that the vehicle enters a sliding working condition.

Further, still include: and when the opening degree of any one of the accelerator pedal and the brake pedal is larger than or equal to the opening degree threshold value, the sliding working condition is quitted.

An embodiment of a second aspect of the present application provides an electric brake control apparatus for a vehicle, including: the first detection module is used for detecting whether the vehicle enters a sliding working condition or not; the second detection module is used for detecting the actual acceleration or the actual deceleration of the vehicle when the vehicle enters the coasting working condition; and the control module is used for matching the current braking interval according to the actual acceleration or the actual deceleration and controlling the driving motor to perform electric braking based on the target electric energy braking intensity according to the target electric energy braking intensity determined by the current braking interval when the energy is recovered through braking.

Further, the control module includes: the first control unit is used for carrying out electric braking based on first electric energy braking intensity when the current braking interval is a normal road surface braking interval; the second control unit is used for carrying out electric braking based on second electric braking strength when the current braking section is a downhill road braking section, wherein the second electric braking strength is greater than the first electric braking strength; and the third control unit is used for performing electric braking based on third electric energy braking intensity when the current braking interval is an uphill road braking interval, wherein the third electric energy braking intensity is smaller than the first electric energy braking intensity.

Further, the first detection module comprises: the detection unit is used for detecting the opening degrees of an accelerator pedal and a brake pedal of the vehicle; the judging unit is used for judging whether the opening degrees of the accelerator pedal and the brake pedal are both smaller than an opening degree threshold value; and the determining unit is used for determining that the vehicle enters a sliding working condition when the opening degrees of the accelerator pedal and the brake pedal are both smaller than an opening degree threshold value.

Further, still include: and the working condition exit module is used for exiting the sliding working condition when the opening degree of any one of the accelerator pedal and the brake pedal is larger than or equal to the opening degree threshold value.

An embodiment of a third aspect of the present application provides an electric vehicle including the electric brake control apparatus of the vehicle of the above-described embodiment.

The target electric energy braking strength is determined according to the actual acceleration or the actual deceleration of the vehicle, the electric braking can be carried out based on the target electric energy braking strength while the energy is recovered through braking, so that the electric energy braking strength can be automatically adjusted according to the state of the vehicle, the convenience and the accuracy of electric braking adjustment are improved, the braking safety is improved, the energy loss caused by the fact that the kinetic energy of the vehicle is converted into the heat energy when the vehicle is braked is reduced, the energy loss caused by the fact that the kinetic energy and the electric energy are repeatedly converted is avoided to a certain extent, the cruising mileage of the vehicle is increased while the energy recovery rate is improved, and the use experience of a user is improved. Therefore, the problems that the safety and the energy recovery rate of braking are low and the like caused by poor convenience and accuracy of the conventional electric brake regulation are solved.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a flowchart of an electric brake control method of a vehicle according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an executing device of an electric braking control method of a vehicle according to an embodiment of the application;

FIG. 3 is a flow chart of a method of controlling electric braking of a vehicle according to one embodiment of the present application;

fig. 4 is an example diagram of an electric brake control apparatus of a vehicle according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the range of the current electric vehicle motor reverse dragging brake actuating device, basically, the setting of the electric brake force is completed through the setting of a driver, part of vehicle types convenient to adjust can be realized through a brake energy recovery quick adjusting button, and the vehicle types inconvenient to adjust generally need multistep operation, are inconvenient to adjust in the driving process and are inconvenient for the driver to use.

To this end, embodiments of the present application propose an electric brake control method and apparatus for a vehicle and an electric vehicle, and the following describes an electric brake control method and apparatus for a vehicle and an electric vehicle according to embodiments of the present application with reference to the drawings. Aiming at the problem that the conventional electric brake is low in safety and energy recovery rate due to poor convenience and accuracy of regulation, which is mentioned in the background technology center, the application provides an electric brake control method of a vehicle, in the method, a target electric braking intensity is determined according to an actual acceleration or an actual deceleration of the vehicle, electric braking can be performed based on the target electric braking intensity while energy is recovered by braking, thereby automatically adjusting the electric braking strength according to the state of the vehicle, improving the convenience and accuracy of electric braking adjustment, improving the braking safety, and the energy loss of the vehicle kinetic energy converted into heat energy during braking is reduced, the energy loss caused by repeated conversion of the kinetic energy and the electric energy is avoided to a certain extent, the energy recovery rate is improved, the endurance mileage of the vehicle is increased, and the use experience of a user is improved. Therefore, the problems that the safety and the energy recovery rate of braking are low and the like caused by poor convenience and accuracy of the conventional electric brake regulation are solved.

Specifically, fig. 1 is a schematic flowchart of an electric brake control method of a vehicle according to an embodiment of the present application.

As shown in fig. 1, the electric brake control method of the vehicle includes the steps of:

in step S101, it is detected whether the vehicle enters a coasting condition.

The main body of the electric brake control method for a vehicle may be an electric vehicle. The electric brake control method of the vehicle of the embodiment of the present application may be executed by the electric brake control apparatus of the vehicle of the embodiment of the present application, and the electric brake control apparatus of the vehicle of the embodiment of the present application may be configured in any electric vehicle to execute the electric brake control method of the vehicle of the embodiment of the present application.

When the electric vehicle needs to be braked during running, the electric vehicle can be reversely dragged through the driving motor, and kinetic energy of the vehicle is converted into electric energy and stored in the battery while the vehicle decelerates. The method comprises the following steps of firstly, judging whether the speed of a vehicle is high or not, and if the speed of the vehicle is low, judging whether the speed of the vehicle is high or not according to the speed of the vehicle. Because the total dragging resistance of the electric vehicle is lower than that of a fuel vehicle, the electric vehicle is usually set to control a driving motor to perform reverse driving when the vehicle is in a sliding working condition, and partial kinetic energy is converted into electric energy to perform sliding energy feedback.

Therefore, the embodiment of the application firstly detects whether the vehicle normally runs to enter the sliding working condition or not so as to carry out subsequent braking control. In this embodiment, detecting whether the vehicle enters the coasting condition includes: detecting the opening degrees of an accelerator pedal and a brake pedal of a vehicle; judging whether the opening degrees of an accelerator pedal and a brake pedal are both smaller than an opening degree threshold value; and when the opening degrees of the accelerator pedal and the brake pedal are both smaller than the opening degree threshold value, determining that the vehicle enters a sliding working condition.

The opening degree threshold values of the accelerator pedal and the brake pedal can be determined according to the opening degrees of the accelerator pedal and the brake pedal of the vehicle when the accelerator pedal and the brake pedal are completely released. When the vehicle speed is detected, and the user does not step on a brake pedal or an accelerator pedal, the user is judged to have the vehicle sliding requirement, namely, the vehicle enters the sliding working condition.

In some embodiments, the coast condition is exited when the opening of either the accelerator pedal or the brake pedal is greater than or equal to an opening threshold.

In step S102, if the vehicle enters the coasting condition, the actual acceleration or the actual deceleration of the vehicle is detected.

In step S103, the currently located braking interval is matched according to the actual acceleration or the actual deceleration, and the target electric braking strength determined according to the currently located braking interval is used to control the driving motor to perform electric braking based on the target electric braking strength while recovering energy during braking.

It can be understood that the embodiment of the application can utilize the braking energy recovery capability of the electric drive system to generate negative torque, convert the kinetic energy of the vehicle into electric energy and store the electric energy in the battery; meanwhile, the electric energy braking strength can be properly adjusted, so that the energy loss caused by the fact that the kinetic energy of the vehicle is converted into heat energy during conventional braking is avoided, the energy loss caused by the repeated conversion of the kinetic energy and the electric energy is also avoided to a certain extent, the cruising mileage of the vehicle is increased to a certain extent, and the driving feeling of a user is improved.

In this embodiment, controlling the driving motor to perform electric braking based on the target electric braking intensity includes: if the current braking interval is a normal road surface braking interval, performing electric braking based on the first electric energy braking strength; if the current braking interval is a downhill road braking interval, performing electric braking based on second electric braking intensity, wherein the second electric braking intensity is greater than the first electric braking intensity; and if the current braking interval is an uphill road braking interval, performing electric braking based on third electric energy braking intensity, wherein the third electric energy braking intensity is smaller than the first electric energy braking intensity.

It can be understood that, since different drivers experience different driving experiences of the vehicle, different coasting energy feedback levels are usually set in the design of the vehicle, and the coasting energy feedback levels correspond to different electric braking strengths to meet actual driving requirements of different users. In order to improve the endurance mileage of the electric vehicle, the electric energy braking strength is adjusted at a proper time, wherein when the vehicle is in a downhill and the vehicle speed is gradually increased, the electric energy braking strength is properly increased, and the situation that a user actively steps on a brake pedal to cause hydraulic braking to intervene and lose the vehicle kinetic energy due to the increase of the vehicle speed is avoided; when the vehicle is on an uphill slope and the speed of the vehicle is accelerated and reduced, energy recovery is reduced, and extra energy loss caused by the fact that kinetic energy is converted into electric energy and then converted into kinetic energy through an electric driving system after the kinetic energy is converted into the electric energy and recovered is avoided.

In summary, the embodiment of the application can utilize the system shown in fig. 2 to adjust the electric braking force in real time, so as to improve the use experience of the user. The following will further explain the electric brake control method of a vehicle by a specific embodiment, as shown in fig. 2 and 3, including the following steps:

step 1, entering a state judgment process when a vehicle normally runs;

step 2, judging whether the vehicle enters a sliding working condition, if the vehicle speed is detected, and the user does not step on the brake or the accelerator, judging that the user has a vehicle sliding demand, namely judging that the vehicle enters the sliding working condition, and executing step 3; otherwise, executing step 1;

step 3, the vehicle performs sliding energy feedback under the sliding working condition, wherein when a user turns on the electric brake automatic regulating switch, the electric brake intensity can be automatically controlled within a certain range according to the calculation and judgment of the calculation control unit; when a user closes the electric brake automatic regulating switch, the electric energy brake strength can be realized only through the electric brake regulating switch;

step 4, when a user turns on the electric brake automatic adjusting switch, the acceleration or deceleration condition of the vehicle is continuously monitored in the vehicle sliding state, for example, the acceleration of the vehicle can be detected by a vehicle posture-acceleration sensor, and the deceleration of the vehicle can be detected by a deceleration sensor in the embodiment of the application; the acceleration and the deceleration can be used for judging the electric brake regulation, and the deceleration is taken as an example for judgment;

step 5, judging whether the deceleration is in a threshold range, and if so, executing step 6; if not, executing step 7 when the deceleration is smaller, and executing step 8 when the deceleration is larger;

step 6, when the deceleration is within the threshold value range, determining that the deceleration of the vehicle is matched with a set value, judging that the vehicle runs on a common road surface, not automatically adjusting the electric energy braking intensity, and performing electric braking according to the first electric energy braking intensity;

step 7, when the deceleration of the vehicle is detected to be small, the vehicle is judged to be on a downhill road, the electric braking strength is increased timely, electric braking is carried out according to the second electric braking strength, hydraulic braking intervention is avoided, and the cruising mileage of the vehicle is increased;

step 8, when the deceleration of the vehicle is detected to be larger, the vehicle is judged to be on an uphill road surface, the electric braking strength is timely reduced, electric braking is carried out according to the third electric braking strength, energy waste caused by repeated conversion of kinetic energy and electric energy is avoided, and the cruising mileage of the vehicle is improved;

it should be noted that the electric braking strength display and the electric braking automatic adjustment switch display can be displayed on the instrument in real time to remind the driver of the vehicle state.

According to the electric brake control method of the vehicle, the target electric brake strength is determined according to the actual acceleration or the actual deceleration of the vehicle, the electric brake can be carried out based on the target electric brake strength while energy is recovered through braking, the electric brake strength can be automatically adjusted according to the state of the vehicle, the convenience and the accuracy of electric brake adjustment are improved, the safety of braking is improved, the energy loss caused by the fact that the kinetic energy of the vehicle is converted into heat energy during braking is reduced, the energy loss caused by the fact that the kinetic energy and the electric energy are repeatedly converted is avoided to a certain extent, the endurance mileage of the vehicle is increased while the energy recovery rate is improved, and the use experience of a user is improved.

Next, an electric brake control apparatus of a vehicle proposed according to an embodiment of the present application is described with reference to the drawings.

Fig. 4 is a block schematic diagram of an electric brake control apparatus of a vehicle according to an embodiment of the present application.

As shown in fig. 4, the electric brake control device 10 of the vehicle includes: a first detection module 100, a second detection module 200, and a control module 300.

The first detection module 100 is used for detecting whether the vehicle enters a coasting working condition; the second detection module 200 is used for detecting the actual acceleration or the actual deceleration of the vehicle when the vehicle enters the coasting condition; the control module 300 is configured to match a currently located braking interval according to the actual acceleration or the actual deceleration, and control the driving motor to perform electric braking based on the target electric braking intensity according to the target electric braking intensity determined in the currently located braking interval while recovering energy through braking.

Further, the control module 300 includes: a first control unit, a second control unit and a third control unit. The first control unit is used for carrying out electric braking based on first electric energy braking intensity when the current braking interval is a normal road surface braking interval; the second control unit is used for carrying out electric braking based on second electric braking strength when the current braking section is a downhill road braking section, wherein the second electric braking strength is greater than the first electric braking strength; and the third control unit is used for performing electric braking based on a third electric braking intensity when the current braking interval is an uphill road braking interval, wherein the third electric braking intensity is smaller than the first electric braking intensity.

Further, the first detection module 100 includes: the device comprises a detection unit, a judgment unit and a determination unit. The detection unit is used for detecting the opening degrees of an accelerator pedal and a brake pedal of the vehicle; the judging unit is used for judging whether the opening degrees of the accelerator pedal and the brake pedal are both smaller than an opening degree threshold value; and the determining unit is used for determining that the vehicle enters a sliding working condition when the opening degrees of the accelerator pedal and the brake pedal are both smaller than the opening degree threshold value.

Further, the apparatus 10 of the embodiment of the present application further includes: and the working condition quitting module. The working condition exit module is used for exiting the sliding working condition when the opening degree of any one of an accelerator pedal and a brake pedal is larger than or equal to an opening degree threshold value.

It should be noted that the foregoing explanation of the embodiment of the electric brake control method for a vehicle is also applicable to the electric brake control device for a vehicle of this embodiment, and will not be repeated herein.

According to the electric brake control device of vehicle that this application embodiment provided, confirm target electric energy braking intensity according to the actual acceleration or the actual deceleration of vehicle, can carry out electric brake based on target electric energy braking intensity when braking recovery energy, thereby can be according to the state automatic adjustment electric energy braking intensity of vehicle, the convenience and the accuracy of electric brake regulation have been improved, the security of braking has been promoted, and reduce the energy loss that vehicle kinetic energy turned into heat energy when braking, also avoided the energy loss that kinetic energy and electric energy repeatedly converted and cause to a certain extent, when improving energy recovery rate, the continuation of the journey mileage of vehicle has been increased, user's use experience has been promoted.

In addition, the embodiment of the application also provides an electric vehicle, which comprises the electric brake control device of the vehicle of the embodiment. According to the vehicle of the embodiment of the application, the target electric energy braking intensity is determined according to the actual acceleration or the actual deceleration of the vehicle, the electric braking can be carried out based on the target electric energy braking intensity while the energy is recovered through braking, the electric energy braking intensity can be automatically adjusted according to the state of the vehicle, the convenience and the accuracy of electric braking adjustment are improved, the safety of braking is improved, the energy loss of the kinetic energy of the vehicle, which is converted into the heat energy when the vehicle is braked, the energy loss caused by the repeated conversion of the kinetic energy and the electric energy is avoided to a certain extent, the endurance mileage of the vehicle is increased while the energy recovery rate is improved, and the use experience of a user is improved.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.