阅读说明：本技术 一种车辆超速的提醒系统及控制方法 (Vehicle overspeed reminding system and control method ) 是由 秦明杰 于 2021-08-17 设计创作，主要内容包括：本发明专利公开了一种车辆超速的提醒系统及控制方法,涉及交通设备领域,包括安装架、闪光灯、测距传感器,所述闪光灯和所述测距传感器均设置于安装架上并与中央处理模块连接,中央处理模块中有中央处理器还包括处理模块和信息接受模块,分别与闪光灯和测距传感器连接,所述闪光灯、测距传感器通过连接框架与安装架连接。一种控制方法,通过测距传感器测得的速度与超速罚款的限速值进行比较,如果大于限速值,则闪光灯连续闪烁,提醒驾驶员减速,该技术可以一定程度上避免交通事故的发生。(The invention discloses a vehicle overspeed reminding system and a control method, which relate to the field of traffic equipment and comprise an installation frame, a flash lamp and a distance measuring sensor, wherein the flash lamp and the distance measuring sensor are arranged on the installation frame and connected with a central processing module, the central processing module is internally provided with a central processing unit, the central processing unit also comprises a processing module and an information receiving module which are respectively connected with the flash lamp and the distance measuring sensor, and the flash lamp and the distance measuring sensor are connected with the installation frame through a connecting frame. A control method compares the speed measured by a distance measuring sensor with the speed limit value of an overspeed fine, if the speed is greater than the speed limit value, a flash lamp continuously flickers to remind a driver of decelerating.)

1. The utility model provides a warning system that vehicle is overspeed, includes the mounting bracket, the mounting bracket install in on the road of passing, its characterized in that is applied to the road of passing, includes: the distance measuring device comprises a flash lamp, a distance measuring sensor and a central processing module, wherein the flash lamp and the distance measuring sensor are arranged on a mounting frame, and the flash lamp and the distance measuring sensor are connected with the central processing module.

2. The system as claimed in claim 1, wherein the central processing module includes a processing module, and a command output module and an information receiving module connected to the processing module, the information receiving module is connected to the distance measuring sensor, and the command output module is connected to the flashlight.

3. The system for reminding the speeding of the vehicle according to claim 2, wherein the distance measuring sensor is a laser distance measuring sensor, an ultrasonic distance measuring sensor or a radar sensor.

4. The system for reminding the speeding of the vehicle according to claim 3, further comprising a connecting frame, wherein the flashlight and the distance measuring sensor are arranged in the connecting frame; the distance measuring sensor and the flash lamp are detachably connected with the connecting frame and the mounting frame.

5. The utility model provides a warning system that vehicle is overspeed, includes the mounting bracket, the mounting bracket install in on the road of passing, its characterized in that is applied to the road of passing, includes: the distance measuring device comprises a flashlight, a distance measuring sensor and a central processing module, wherein the flashlight and the distance measuring sensor are arranged on a mounting frame, the flashlight and the distance measuring sensor are in one-to-one correspondence with a plurality of passing lanes respectively, and the flashlight and the distance measuring sensor are connected with the central processing module.

6. The system as claimed in claim 5, wherein the central processing module comprises a processing module, and a command output module and an information receiving module connected with the processing module, the information receiving module is connected with the distance measuring sensor, and the command output module is connected with the flashlight.

7. The system for reminding the speeding of the vehicle according to claim 6, wherein the distance measuring sensor is a laser distance measuring sensor, an ultrasonic distance measuring sensor or a radar sensor.

8. The system as claimed in claim 7, wherein the distance measuring sensor has an optical device housing, and the divergence angle of the distance measuring sensor is controlled by the optical device housing and controlled within a width range capable of detecting only the corresponding lane.

9. The system of claim 8, further comprising a connecting frame, wherein the flashlight and the distance measuring sensor are disposed in the connecting frame; and the distance measuring sensor, the flash lamp and the connecting frame are detachably connected, and the connecting frame and the mounting frame are detachably connected.

10. A method for controlling a vehicle overspeed reminding system according to any one of claims 1 to 4/5 to 9, comprising the steps of:

s1: the central processing module is internally preset with threshold values S0 and S0 for judging the overspeed value of the vehicle on the road, such as 100 percent or 110 percent of the speed limit value of the road;

s2: measuring a speed in the monitored lane by a ranging sensor S1;

s3: the central processing module acquires the measured speed S1, compares S0 with S1, judges that the vehicle does not overspeed if S1 is not greater than S0 and continuously flashes the flashlights corresponding to the monitored lane if S1 is greater than S0, and judges that the vehicle runs at overspeed;

s4: and repeating the steps S2-S3, and if the vehicle speed S1 is not greater than S0, turning off the flash lamp.

Technical Field

The invention relates to the technical field of traffic equipment, in particular to a vehicle overspeed reminding system and a control method.

Background

With the continuous development of economy in China and even global economy, the consumption level is continuously improved, more and more vehicles run on roads, particularly urban roads, which is convenient for people to go out and has many traffic problems.

For example, the occurrence of traffic accidents, in which the proportion of vehicles caused by speeding also takes a very high proportion, is difficult to avoid, causing a great loss in the safety of human life and property.

Most of the existing overspeed violation management can only be inquired on the internet afterwards, and the field overspeed management is a blank, so the formed consequence is that overspeed driving can only be reminded by deducting license points, fines and the like, but overspeed behavior cannot be controlled in real time, the brought effect is not good, and overspeed behavior and various traffic accidents caused by the overspeed behavior cannot be controlled to a greater extent and better.

The existing distance measuring sensor has the function of measuring the speed so as to realize the task of measuring the speed by using the distance measuring sensor.

In summary, we propose a vehicle overspeed reminding system and a control method to solve the above problems.

Disclosure of Invention

The invention aims to provide a vehicle overspeed reminding system and a control method, which can remind drivers of overspeed illegal behaviors in real time.

The embodiment of the invention is realized by the following steps:

in a first aspect, an embodiment of the present application provides a warning system that vehicle is overspeed, including the mounting bracket, the mounting bracket install in passing road is applied to passing road, includes:

the distance measuring device comprises a flash lamp, a distance measuring sensor and a central processing module, wherein the flash lamp and the distance measuring sensor are arranged on a mounting frame, and the flash lamp and the distance measuring sensor are connected with the central processing module.

The central processing module comprises a processing module, and an instruction output module and an information receiving module which are connected with the processing module, wherein the information receiving module is connected with the ranging sensor, and the instruction output module is connected with the flash lamp.

Furthermore, the distance measuring sensor is a laser distance measuring sensor, and can also be an ultrasonic distance measuring sensor or a radar sensor; preferably, the distance measuring sensor is a laser distance measuring sensor.

In some embodiments of the invention, the system further comprises a connecting frame, the flashlight and the ranging sensor being disposed in the connecting frame; furthermore, the distance measuring sensor, the flashlight and the connecting frame are detachably connected, and the connecting frame and the mounting frame are detachably connected.

In a second aspect, an embodiment of the present application further provides another reminding system for speeding of a vehicle, including a mounting bracket, the mounting bracket is installed on a passing road, and is applied to the passing road, including:

the distance measuring device comprises a flashlight, a distance measuring sensor and a central processing module, wherein the flashlight and the distance measuring sensor are arranged on a mounting frame, the flashlight and the distance measuring sensor are in one-to-one correspondence with a plurality of passing lanes respectively, and the flashlight and the distance measuring sensor are connected with the central processing module.

The central processing module comprises a processing module, and an instruction output module and an information receiving module which are connected with the processing module, wherein the information receiving module is connected with the ranging sensor, and the instruction output module is connected with the flash lamp.

Furthermore, the distance measuring sensor is a laser distance measuring sensor, and can also be an ultrasonic distance measuring sensor or a radar sensor; preferably, the distance measuring sensor is a laser distance measuring sensor.

The distance measuring sensor is provided with an optical device, and the divergence angle of the distance measuring sensor is controlled through the optical device and is controlled within the width range capable of only detecting the corresponding lane.

The system also comprises a connecting frame, wherein the flash lamp and the ranging sensor are both arranged in the connecting frame; and the distance measuring sensor, the flash lamp and the connecting frame are detachably connected, and the connecting frame and the mounting frame are detachably connected.

In a third aspect, an embodiment of the present application provides a control method based on the above vehicle overspeed reminding system, including the following steps:

s1: the central processing module is internally preset with threshold values S0 and S0 which are used for judging the overspeed value of the vehicle on the road, such as the 100 percent or 110 percent speed limit value of the road speed limit value or 110 percent of the road speed limit value;

s2: measuring the speed of the vehicle in the monitored lane by a ranging sensor;

s3: the central processing module acquires the measured speed S1, compares S0 with S1, judges that the vehicle does not overspeed if S1 is not greater than S0 and continuously flashes the flashlights corresponding to the monitored lane if S1 is greater than S0, and judges that the vehicle runs at overspeed;

s4: and repeating the steps S2-S3, and if the vehicle speed S1 is not greater than S0, turning off the flash lamp.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

for the first aspect, the application provides a system for reminding vehicle overspeed, which is applied to a passing road and comprises: mounting bracket, flash light, range sensor, central processing module, the flash light with range sensor all sets up on the mounting bracket, the flash light with range sensor all is connected with central processing module.

According to the first aspect, the lanes are provided with the group of the flash lamps and the distance measuring sensors, when vehicles in the lanes run at an overspeed, the vehicles can be tested through the flash lamps and the distance measuring sensors, proper reminding is given when the vehicles run at an overspeed, and the safety of driving and traffic is improved.

For the second aspect, the present application provides a vehicle overspeed reminding system, which is applied to a passing road, and includes: mounting bracket, flash light, range sensor, central processing module, the flash light with range sensor all sets up on the mounting bracket, wherein the multiunit the flash light with range sensor respectively with current many lane one-to-one, the flash light with range sensor all is connected with central processing module.

According to the second aspect, each lane is provided with the combination of the flash lamp and the distance measuring sensor corresponding to the lane, when a vehicle in the lanes runs at an overspeed, the vehicle can be tested through the flash lamp and the distance measuring sensor, proper reminding is given when the vehicle runs at an overspeed, the vehicles in each lane can be distinguished, the driver in each lane is obviously reminded, and the driving and traffic safety is improved.

For a third aspect, the present application provides a control method of a vehicle overspeed reminding system, comprising the steps of:

s1: the central processing module is internally preset with threshold values S0 and S0 for judging the overspeed value of the vehicle on the road, such as 100 percent or 110 percent of the speed limit value of the road;

s2: measuring a speed in the monitored lane by a ranging sensor S1;

s3: the central processing module acquires the measured speed S1, compares S0 with S1, judges that the vehicle does not overspeed if S1 is not greater than S0 and continuously flashes the flashlights corresponding to the monitored lane if S1 is greater than S0, and judges that the vehicle runs at overspeed;

s4: and repeating the steps S2-S3, and if the vehicle speed S1 is not greater than S0, turning off the flash lamp.

For the third aspect, through the steps of S1, S2, S3 and S4, whether the speed of the incoming vehicle exceeds the speed limit value of the lane can be determined, and if the speed exceeds the speed limit value of the lane, the driver can be reminded by a flash lamp to immediately know whether the vehicle is over-speed or not, and the vehicle can be decelerated in time when the overspeed phenomenon occurs, so that the traffic violation is avoided, and the dangerous behaviors that traffic accidents may occur due to the fact that the speed is not decelerated in time are also avoided. The central processing module has the purposes of signal receiving, signal processing and instruction sending, can receive data information measured by the laser range finder, can control the flash lamp to be turned on and off, and can effectively guarantee the normal operation of the whole system.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a block diagram of a vehicle overspeed warning system with a set of flashing lights and range sensors for all lanes according to an embodiment of the present invention;

FIG. 2 is a block diagram of a vehicle overspeed reminding system according to an embodiment of the present invention, in which a set of flashing lamps and distance measuring sensors are installed on each lane;

FIG. 3 is a schematic diagram of a vehicle overspeed warning system according to an embodiment of the present invention;

fig. 4 is a flowchart of a control method of a vehicle overspeed reminding system according to an embodiment of the present invention.

Icon: 1. a mounting frame; 2. a central processing module; 3. a ranging sensor; 4. a flash lamp; 5 connecting the frame.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" represents at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

Referring to fig. 1, fig. 3 and fig. 4, fig. 1 is a structural diagram of a vehicle overspeed reminding system in which a set of flashing lamps and distance measuring sensors are arranged in all lanes according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a vehicle overspeed warning system according to an embodiment of the present invention; fig. 4 is a flowchart of a control method of a vehicle overspeed reminding system according to an embodiment of the present invention.

The embodiment provides a warning system that vehicle is overspeed, is applied to the road of passing, includes:

mounting bracket 1, flash light 4, range sensor 3, central processing module 2, flash light 4 with range sensor 3 all sets up on mounting bracket 1, flash light 4 with range sensor 3 all is connected with central processing module 2, has central processing unit in central processing module 2.

In some embodiments of the present invention, the flash 4 and the distance measuring sensor 3 are one or more, and are used for monitoring vehicles on each lane of a plurality of roads, and preferably, the distance measuring sensor 3 is one, and is disposed right above the center portion of the width of the plurality of roads.

In some embodiments of the present invention, the central processing module 2 comprises a processing module, and an instruction output module and an information receiving module connected with the processing module, the information receiving module is connected with the ranging sensor 3, and the instruction output module is connected with the flashlight 4.

In the above embodiment, the information receiving module is responsible for receiving the data of the distance measuring sensor 3 and transmitting the data to the processing module, the processing module analyzes and compares the data to obtain a conclusion, and the control instruction output module controls the flash lamp 4 to operate according to the conclusion. The information receiving module and the flash lamp 4 are transmitted through light transmission or Lora wireless communication.

More preferably, the distance measuring sensor 3 is a laser distance measuring sensor 3, and may also be an ultrasonic distance measuring sensor 3 or a radar sensor; preferably, if a radar sensor, the radar sensor is a 24GHz radar sensor.

In some embodiments of the invention, the system further comprises a connecting frame 5, the flashlight 4 and the range sensor 3 being both disposed in the connecting frame 5; and the distance measuring sensor 3, the flash lamp 4 and the connecting frame 5, the connecting frame 5 and the mounting rack 1 are detachably connected so as to ensure that the single device can be easily replaced when replaced.

In the above embodiment, the flashlight 4 and the distance measuring sensor 3 are connected into a whole through the connecting frame 5, so as to ensure better overall stability.

Preferably, the distance measuring sensor 3 and the flashlight 4 are arranged at the upper end of the mounting frame 1, and the distance measuring sensor 3 is arranged at the lower end of the flashlight 4, so that the distance measuring sensor 3 is protected to the maximum extent, and meanwhile, a space with the maximum degree is reserved for the height limit of a vehicle.

In some embodiments of the present invention, the indication mounting frame 1 includes a grounding plate, the grounding plate is provided with a grounding screw hole, and a grounding bolt is arranged through the grounding screw hole.

In the above embodiment, the ground plate is provided with the L-shaped connecting rod, the connecting frame 5 and the traffic signal lamp are both arranged on the connecting rod, the number of the ground screw holes in the ground plate is multiple, and the multiple ground screw holes are uniformly distributed around the circumferential direction of the connecting rod, so that the connection stability of the ground plate and the ground is improved.

In some embodiments of the present invention, a threshold S0 is preset in the cpu, the threshold S0 is a value for determining the overspeed of the vehicle on the road, such as 100% or 110% of the speed limit of the road, and the distance measuring sensor 3 is used for measuring the speed of the vehicle; the central processing module 2 acquires the speed S1 of the vehicle measured by the distance measuring sensor 3, compares S0 with S1 at the same time, judges that the vehicle does not overspeed if S1 is not larger than S0, and continuously flashes the flash lamp 4 if S1 is larger than S0, judges that the vehicle runs at overspeed so as to achieve the function of reminding the driver of deceleration. During the continuation of the detection, if no vehicle on the monitored lane is determined to be speeding, the flash 4 is turned off.

In the above embodiment, the threshold S0 may also be a speed value at which the vehicle in the detected lane is traveling to a decision violation and will be awarded an overspeed fine.

Example 2

Referring to fig. 2, fig. 3 and fig. 4, fig. 2 is a structural diagram of a vehicle overspeed reminding system in which a group of flash lamps 4 and a distance measuring sensor 3 are arranged in each lane according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a vehicle overspeed warning system according to an embodiment of the present invention; fig. 4 is a flowchart of a control method of a vehicle overspeed reminding system according to an embodiment of the present invention.

The embodiment provides a warning system that vehicle is overspeed, is applied to the road of passing, includes:

mounting bracket 1, flash light 4, range sensor 3, central processing module 2, flash light 4 with range sensor 3 all sets up on mounting bracket 1, wherein the multiunit the flash light 4 with range sensor 3 respectively with current many lane one-to-ones, flash light 4 with range sensor 3 all is connected with central processing module 2, has central processing unit in the central processing module 2.

In some embodiments of the invention, the flashing lights 4 and the range sensors 3 are used to monitor vehicles on corresponding lanes on a plurality of roads, preferably positioned directly above the widthwise central portion of each road.

The central processing module 2 comprises a processing module, and an instruction output module and an information receiving module which are connected with the processing module, wherein the information receiving module is connected with the ranging sensor 3, and the instruction output module is connected with the flash lamp 4.

In the above embodiment, the information receiving module is responsible for receiving the data of the distance measuring sensor 3 and transmitting the data to the processing module, the processing module analyzes and compares the data to obtain a conclusion, and the control instruction output module controls the flash lamp 4 to operate according to the conclusion. The information receiving module and the flash lamp 4 are transmitted through light transmission or Lora wireless communication.

More preferably, the distance measuring sensor 3 is a laser distance measuring sensor 3, and may also be an ultrasonic distance measuring sensor 3 or a radar sensor, and preferably, the radar sensor is a 24GHZ radar sensor.

The distance measuring sensor 3 is provided with an optical device, the divergence angle of the distance measuring sensor 3 is controlled through the optical device, the divergence angle is controlled within the width range of only detecting the corresponding lane, and the emission angle of the distance measuring sensor 3 can also be controlled through an optical system.

The system further comprises a connecting frame 5, and the flash lamp 4 and the ranging sensor 3 are both arranged in the connecting frame 5; and the distance measuring sensor 3, the flash lamp 4 and the connecting frame 5 are detachably connected with each other, so that the single equipment is more easily replaced when replaced.

In the above embodiment, the flashlight 4 and the distance measuring sensor 3 are connected into a whole through the connecting frame 5, so as to ensure better overall stability.

Preferably, the distance measuring sensor 3 and the flashlight 4 are arranged at the upper end of the mounting frame 1, and the distance measuring sensor 3 is arranged at the lower end of the flashlight 4, so that the distance measuring sensor 3 is protected to the maximum extent, and meanwhile, a space with the maximum degree is reserved for the height limit of a vehicle.

In some embodiments of the present invention, the indication mounting frame 1 includes a grounding plate, the grounding plate is provided with a grounding screw hole, and a grounding bolt is arranged through the grounding screw hole.

In the above embodiment, the ground plate is provided with the L-shaped connecting rod, the connecting frame 5 and the traffic signal lamp are both arranged on the connecting rod, the number of the ground screw holes in the ground plate is multiple, and the multiple ground screw holes are uniformly distributed around the circumferential direction of the connecting rod, so that the connection stability of the ground plate and the ground is improved.

In some embodiments of the present invention, the threshold S0, S0 is preset in the cpu, and is used for determining the overspeed value of the vehicle, such as 100% or 110% of the speed limit value of the road, for the road, and the distance measuring sensor 3 is used for measuring the speed of the vehicle; the central processing module 2 acquires the speed S1 of the vehicle measured by the distance measuring sensor 3, compares S0 with S1 at the same time, judges that the vehicle does not overspeed if S1 is not larger than S0, continuously flashes the flash lamp 4 if S1 is larger than S0, judges that the vehicle runs at overspeed to achieve the function of reminding a driver of decelerating, and turns off the flash lamp 4 if no vehicle on the monitored lane is judged to overspeed in the process of continuous detection.

In the above embodiment, the threshold S0 may also be a speed value at which the vehicle in the detected lane is traveling to a decision violation and will be awarded a speeding fine.

Example 3

Referring to fig. 1 to 4, fig. 1 is a structural diagram of a vehicle overspeed reminding system in which a set of flashing lights 4 and a distance measuring sensor 3 are arranged on all lanes according to an embodiment of the present invention; fig. 2 is a structural diagram of a vehicle overspeed reminding system in which a group of flashing lamps 4 and a distance measuring sensor 3 are arranged on each lane according to an embodiment of the invention; FIG. 3 is a schematic diagram of a vehicle overspeed warning system according to an embodiment of the present invention; fig. 4 is a flowchart of a control method of a vehicle overspeed reminding system according to an embodiment of the present invention.

A control method of a vehicle overspeed reminding system comprises the following steps:

s1: the central processing module 2 is internally preset with threshold values S0 and S0 for judging the overspeed value of the vehicle on the road, such as 100 percent or 110 percent of the speed limit value of the road;

s2: measuring the speed in the monitored lane by the ranging sensor 3S 1;

s3: the central processing module obtains the measured speed S1, compares S0 with S1, if S1 is not greater than S0, the vehicle is judged not to be over-speed, if S1 is greater than S0, the central processing module continuously flickers the flashlight corresponding to the monitored lane, and the vehicle is judged to be over-speed.

In the above embodiment, the threshold S0 may also be a speed value at which the vehicle in the detected lane is traveling to a decision violation and will be awarded a speeding fine.

Through the steps of S1, S2, S3 and S4, the real-time judgment of whether the vehicle is overspeed can be achieved, and a driver can immediately know whether the vehicle is overspeed. The central processing module 2 has the purposes of signal receiving, signal processing and instruction sending, and can not only receive data information measured by the ranging sensor 3, but also control the on and off of the flash lamp 4.

It should be noted that the model of the central processing module 2 is the spread 920 processor, and the flash lamp 4 is a white lamp, which will not cause too much interference to the driver's view.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.