阅读说明：本技术 一种用于文化旅游的夜间视觉营造系统 (Night vision construction system for cultural tourism ) 是由 刘海涛 于 2021-07-09 设计创作，主要内容包括：本发明提供一种用于文化旅游的夜间视觉营造系统,包括展馆,展馆分设有多个展厅,每个展厅内均设置有视觉营造子模块,每个视觉营造子模块均包括信息采集模块、控制模块和视觉模块；信息采集模块包括用于采集旅游人员参观行为的第一采集模块；控制模块用于接收第一采集模块的采集信息,并根据采集信息控制视觉模块对工艺品进行展示,视觉模块对工艺品的展示包括对工艺品产品的展示及工艺品的制作流程展示,通过对工艺品的制作工艺的流程及对应每个制作步骤的工艺品的模型进行展示,可以给旅游者营造一个身临其境的视觉环境,可以使旅游者更深层次的了解工艺品的文化底蕴,提高文化旅游的魅力,可以促进文化旅游的发展。(The invention provides a night vision construction system for cultural tourism, which comprises an exhibition hall, wherein the exhibition hall is divided into a plurality of exhibition halls, each exhibition hall is internally provided with a vision construction submodule, and each vision construction submodule comprises an information acquisition module, a control module and a vision module; the information acquisition module comprises a first acquisition module for acquiring the visiting behavior of tourists; control module is used for receiving the information collection of first collection module, and demonstrate to the handicraft according to information collection control vision module, the demonstration of vision module to the handicraft includes the show to the handicraft product and the preparation flow show of handicraft, show through the flow to the preparation technology of handicraft and the model of the handicraft that corresponds every preparation step, can build a visual environment on the spot for the tourist, can make the cultural bottom of the deeper understanding handicraft of tourist, improve the appeal of cultural tourism, can promote the development of cultural tourism.)

1. A night vision construction system for cultural tourism is characterized by comprising an exhibition hall, wherein the exhibition hall is divided into a plurality of exhibition halls, each exhibition hall is internally provided with a vision construction submodule, and each vision construction submodule comprises an information acquisition module, a control module and a vision module; the information acquisition module comprises a first acquisition module for acquiring the visiting behaviors of tourists; the control module is used for receiving the acquisition information of the first acquisition module and controlling the visual module to display the artware according to the acquisition information, and the display of the artware by the visual module comprises the display of artware products and the production process display of the artware.

2. The night vision system for cultural tourism as claimed in claim 1, wherein the information collecting module further comprises a second collecting module for detecting the operation of the vision module; the system comprises a plurality of vision building submodules, and is characterized by further comprising a monitoring module, wherein the monitoring module is used for receiving information collected by a second collecting module in the plurality of vision building submodules, analyzing the collected information to obtain the working condition of each vision module, and judging whether the vision module works normally according to the working condition of each vision module.

3. The night vision system as claimed in claim 2, wherein the first capturing module comprises at least one first camera and a first video capturing card, and the first video capturing card is used for converting the analog signal captured by the first camera into a digital signal and transmitting the digital signal to the control module.

4. The night vision building system for cultural tourism according to claim 2, wherein the vision module comprises a display screen arranged in an exhibition hall, and at least one exhibition stand, each of which is provided with a light source for irradiating the exhibits on the exhibition stand.

5. The night vision system for cultural tourism as claimed in claim 4, wherein the second capture module further comprises a second camera for capturing image information of the display screen and the exhibition booth, and a second video capture card for converting analog signals captured by the second camera into digital signals and transmitting the digital signals to the monitoring module.

6. The night vision system for cultural tourism as claimed in claim 5, wherein the image information obtained by the second camera includes content information of a display screen playing video, lighting time point and off time point information of a light source on each of the exhibition stands, and work information of each of the exhibition stands.

7. The night vision building system for cultural tourism according to claim 6, further comprising an alarm module, wherein the alarm module is used for receiving the monitoring information of the monitoring module and sending an alarm signal to the alarm module when the visual module fails.

Technical Field

The invention relates to the technical field of vision construction, in particular to a night vision construction system for cultural tourism.

Background

The cultural tourism is a behavior process for realizing the purposes of perceiving, understanding and observing the specific cultural contents of human beings through tourism. The travel is intended to appreciate the tradition culture of foreign countries, to trace the trails of cultural celebrities or to participate in various cultural activities held locally.

The Chinese cultural tourism can be divided into the following four levels, namely historical culture layers represented by cultural relics, historical records, ancient sites, ancient buildings and the like; modern culture layer represented by modern culture, art and technical achievements; folk culture layers represented by resident daily life customs, festival celebrations, sacrifice, weddings and funerals, sports activities, clothes and the like; moral and ethical culture layer using interpersonal communication as representation. The current cultural tourism is mainly visited on the spot, and for some handicrafts, tourists cannot realize the cultural bottom in the handicrafts only by visiting the handicrafts, so that the charm of the cultural tourism cannot be played.

Disclosure of Invention

In view of the above, the present application provides a night vision construction system for cultural tourism to solve the technical problems set forth in the background art.

The invention provides a night vision construction system for cultural tourism, which comprises an exhibition hall, wherein the exhibition hall is divided into a plurality of exhibition halls, each exhibition hall is internally provided with a vision construction submodule, and each vision construction submodule comprises an information acquisition module, a control module and a vision module; the information acquisition module comprises a first acquisition module for acquiring the visiting behaviors of tourists; the control module is used for receiving the acquisition information of the first acquisition module and controlling the visual module to display the artware according to the acquisition information, and the display of the artware by the visual module comprises the display of artware products and the production process display of the artware.

Further, the information acquisition module also comprises a second acquisition module for detecting the work of the vision module; the system comprises a plurality of vision building submodules, and is characterized by further comprising a monitoring module, wherein the monitoring module is used for receiving information collected by a second collecting module in the plurality of vision building submodules, analyzing the collected information to obtain the working condition of each vision module, and judging whether the vision module works normally according to the working condition of each vision module.

Furthermore, the first acquisition module comprises at least one first camera and a first video acquisition card, and the first video acquisition card is used for converting the analog signals shot by the first camera into digital signals and transmitting the digital signals to the control module.

Furthermore, the control module comprises a visual processing module and an execution module, the visual processing module is used for receiving information transmitted by the first video acquisition card, the first camera is arranged at an entrance of the exhibition hall, the information acquired by the first camera comprises visiting behavior information of tourists, and the visiting behavior information of the tourists comprises position information of the tourists;

the method for determining the position information of the tourist by the processing module comprises the following steps: a. the vision processing module acquires the image data of the positions of the tourists, which is transmitted by the first video acquisition card, and noise filtering is performed on the image in a mask plate mode. b. The method comprises the steps of extracting contour information of each person on an image and position information of each exhibition room in the exhibition hall, determining distance information of the person from the exhibition hall, determining action tracks of tourists according to the contour information of the person in the image information collected before and after the video, and when the action tracks of the tourists are close to the exhibition hall and the distance between the position of the tourists and the exhibition hall is smaller than a preset threshold value and the distance is kept to be greater than or equal to 5 seconds, controlling a vision module in the exhibition hall to work by an execution module to be displayed.

Specifically, the predetermined threshold is determined according to the size of the corridor in the exhibition hall, the width of the corridor is L1, and when the distance L2 between the tourist and the exhibition hall is less than or equal to 1/4L 1, the distance between the tourist and the exhibition hall is less than the predetermined threshold.

Further, the vision module is including setting up display screen, at least one stand in the exhibition room, every the stand all is provided with and is used for shining the light source of show article on the stand.

Furthermore, the display screen is used for displaying the production process video of the handicraft; each exhibition hall is internally provided with a plurality of exhibition stands, models of artware in different production stages are respectively placed on each exhibition stand in sequence, and the control device is used for controlling the corresponding light sources on the exhibition stands to be lightened according to the playing progress of the production process video; because the content played by the display screen is the handicraft making process and comprises all making steps of the handicraft, when each step of video playing is carried out, the light source on the exhibition stand provided with the handicraft model of the corresponding step is lightened, and the light sources on other exhibition stands are extinguished; namely, when the video begins to be played, the corresponding light source of the exhibition stand is lightened, and after the video is played, the light source of the corresponding exhibition stand is extinguished, so that tourists can watch the video through the artware on the exhibition stand.

Furthermore, the second acquisition module still includes second camera and second video capture card, the second camera is used for acquireing the display screen with the image information of stand work, the second video capture card is used for with analog signal conversion that the second camera was shot is digital signal and transmits for monitor module.

Further, the image information acquired by the second camera includes content information of a display screen playing video, each of the content information includes lighting time points and closing time point information of the light source on the exhibition stand, and work information of each of the exhibition stands.

The visual module is used for monitoring the visual information of the monitoring module, and sending an alarm signal to the alarm module when the visual module fails.

Further, the method for judging the working fault of the vision module by the monitoring module comprises the following steps: 1. dividing the content played by the display screen into a plurality of sections according to the process steps, wherein each section of video comprises a manufacturing step of the handicraft; 2. sequentially marking the video segments of each production step; 3. extracting a playing picture at the beginning and a playing picture at the end of each video segment as a comparison picture of the video segment; 4. sequentially marking the exhibition stands corresponding to each video segment according to the marking sequence of the marked video segments; 5. the second camera is used for acquiring a playing picture of a display screen in the exhibition hall and lighting pictures of the light sources of all the exhibition stands, and extracting the occurrence time point information of the contrast pictures in the pictures and the lighting time point information and the closing time point information of the light sources on all the exhibition stands by acquiring the pictures of the playing picture in the display screen so as to determine the playing time information of all the video segments and the lighting time information of the light sources on all the exhibition stands; 6. judging according to the relationship between the lighting time point and the closing time point of the light source of the exhibition stand and the playing time of each video segment, and judging that the visual module works in fault when the actual advanced lighting time T3 of the light source of the exhibition stand meets the actual advanced closing time T4 meets (-T3-T2) 'T2) (-T3-T2)' T2) > is not less than 60%.

Further, the lighting time of the light source of the exhibition stand is determined by the method of: the method comprises the following steps that 10-20 seconds before playing of a video segment corresponding to the first video production step, the light source of the corresponding exhibition stand starts to be turned on, 5-10 seconds before the video segment is played, the light source of the corresponding exhibition stand is turned off, and the turn-on time of the light source of the exhibition stand corresponding to the subsequent video segment is determined by the following formula: the duration of the video segment is T1, the duration of the previous video segment is T2, and the duration of the next video segment is T3, then T1 is (T2/T1) & + 10, T2 is (T1/T3) & + 5, & is a time correction coefficient, the value range is 0.1-10, wherein T1 is the time when the light source of the video segment corresponding to the exhibition stand of the video segment is turned on in advance before the video segment starts playing; t1 is the time when the light source of the exhibition stand corresponding to the video segment is turned off in advance after the video segment is played; through this kind of limited mode, can extinguish the stand that corresponds before one section preceding video broadcast is accomplished, remind the visitor to carry out the explanation of next stage, and light the stand that next step video corresponds in advance, thereby can make spectator know the handicraft place position that next step corresponds, thereby can make spectator can be better find corresponding handicraft according to the guide of light source, play better vision construction effect, make spectator can be better understand the preparation flow to this handicraft, and make the tourist can more deep understanding handicraft through the explanation of handicraft and preparation flow, improve the glamour of tourism culture.

Furthermore, the second acquisition module comprises an optical sensor arranged on each exhibition stand, the optical sensor is used for detecting the light emitting condition of the light source, the light emitting starting time point and the light emitting closing time point of each exhibition stand light source can be detected through the optical sensor, the light emitting time of the light source is confirmed again, and the accuracy is ensured; in addition, the light sensor can also acquire the light-emitting brightness of the light source and monitor the light-emitting brightness of the light source; the monitoring module receives information transmitted by the optical sensor, judges that the light source fails when the brightness of the light source does not meet the requirement, and sends data to the alarm device, and the alarm device sends out an alarm signal in time.

Specifically, wherein the information that the second collection module conveys to alarm module includes the positional information of each exhibition room, the time information of the video section of display screen broadcast in every exhibition room, the positional information of the stand in every exhibition room, every the illumination intensity information of the light source on the stand on light-on time information, closing time information and the light source on every stand, alarm module includes the display screen, includes the server, is connected with mobile terminal through the server, and mobile terminal is the handheld device of each maintenance person, and the display screen is used for showing the operating condition information of visual module in each exhibition room, shows on the display screen when visual module in the exhibition room breaks down, shows that the content includes the positional information of exhibition room, trouble information to send alarm information to mobile terminal through the server, in time remind maintenance person to maintain.

According to the night vision construction system for the cultural tourism, which is provided by the invention, the process of the manufacturing process of the handicraft and the handicraft corresponding to each manufacturing step are displayed, so that an on-the-spot visual environment can be constructed for tourists, the tourists can know the cultural background of the handicraft more deeply, more knowledge can be obtained in the process of the cultural tourism, the charm of the cultural tourism is improved, and the development of the cultural tourism can be promoted.

In addition, light source through controlling on every stand lights in advance and extinguishes in advance, can make the tourist know the position of the handicraft model that the next preparation step of handicraft corresponds through the guide of light to can make spectator can be better find corresponding handicraft according to the guide of light source, play better vision and build the effect, make spectator can be better know the preparation flow of this handicraft.

In addition, through setting up information acquisition module and can carrying out real-time information acquisition to the operating condition of vision module to in time with information acquisition module conveying to monitoring module, thereby can be real-timely monitor the working condition of the vision module in every exhibition room, can produce the very first time when the vision module breaks down and send alarm module to, send alarm information, make maintenance personal can get rid of the trouble very first time, guarantee the reliability of this vision construction system work.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings.

Fig. 1 is a schematic block diagram of a night vision construction system for cultural tourism according to the present invention.

Fig. 2 is a schematic structural diagram of a vision construction subsystem in the night vision construction system for cultural tourism provided by the invention.

Fig. 3 is a schematic structural diagram of an information acquisition module in the night vision construction system for cultural tourism according to the present invention.

Fig. 4 is a schematic structural diagram of a visual module in the night vision construction system for cultural tourism according to the present invention.

Fig. 5 is a flow chart of a visual construction method of the night visual construction system for cultural tourism provided by the invention.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The invention provides a night vision construction system for cultural tourism, which refers to the figures 1-4 and comprises an exhibition hall, wherein the exhibition hall is divided into a plurality of exhibition halls, each exhibition hall is internally provided with a vision construction submodule, and each vision construction submodule comprises an information acquisition module, a control module and a vision module; the information acquisition module comprises a first acquisition module for acquiring the visiting behaviors of tourists; the control module is used for receiving the acquisition information of the first acquisition module and controlling the visual module to display the artware according to the acquisition information, and the display of the artware by the visual module comprises the display of artware products and the production process display of the artware.

Further, the information acquisition module also comprises a second acquisition module for detecting the work of the vision module; the system comprises a plurality of vision building submodules, and is characterized by further comprising a monitoring module, wherein the monitoring module is used for receiving information collected by a second collecting module in the plurality of vision building submodules, analyzing the collected information to obtain the working condition of each vision module, and judging whether the vision module works normally according to the working condition of each vision module.

Furthermore, the first acquisition module comprises at least one first camera and a first video acquisition card, and the first video acquisition card is used for converting the analog signals shot by the first camera into digital signals and transmitting the digital signals to the control module.

Furthermore, the control module comprises a visual processing module and an execution module, the visual processing module is used for receiving information transmitted by the first video acquisition card, the first camera is arranged at an entrance of the exhibition hall, the information acquired by the first camera comprises visiting behavior information of tourists, and the visiting behavior information of the tourists comprises position information of the tourists;

the method for determining the position information of the tourist by the processing module comprises the following steps: a. the vision processing module acquires the image data of the position of the tourist group personnel transmitted by the first video acquisition card, and noise filtering is carried out on the image by adopting a mask mode. b. And c, determining the action track of tourists according to the contour information of the personnel in the collected graphic information, wherein when the action track of the tourists is close to the exhibition hall and the distance between the position of the tourists and the exhibition hall is less than a preset threshold value, the execution module controls the visual module in the exhibition hall to work and display.

Further, the vision module is including setting up display screen, at least one stand in the exhibition room, every the stand all is provided with and is used for shining the light source of show article on the stand.

Furthermore, the display screen is used for displaying the production process video of the handicraft; each exhibition hall is internally provided with a plurality of exhibition stands, models of artware in different production stages are respectively placed on each exhibition stand in sequence, and the control device is used for controlling the corresponding light sources on the exhibition stands to be lightened according to the playing progress of the production process video; because the content played by the display screen is the handicraft making process and comprises all making steps of the handicraft, when each step of video playing is carried out, the light source on the exhibition stand provided with the handicraft model of the corresponding step is lightened, and the light sources on other exhibition stands are extinguished; namely, when the video begins to be played, the corresponding light source of the exhibition stand is lightened, and after the video is played, the light source of the corresponding exhibition stand is extinguished, so that tourists can watch the video through the artware on the exhibition stand.

Furthermore, the second acquisition module still includes second camera and second video capture card, the second camera is used for acquireing the display screen with the image information of stand work, the second video capture card is used for with analog signal conversion that the second camera was shot is digital signal and transmits for monitor module.

Further, the image information acquired by the second camera includes content information of a display screen playing video, each of the content information includes lighting time points and closing time point information of the light source on the exhibition stand, and work information of each of the exhibition stands.

The visual module is used for monitoring the visual information of the monitoring module, and sending an alarm signal to the alarm module when the visual module fails.

Further, the method for judging the working fault of the vision module by the monitoring module comprises the following steps: 1. dividing the content played by the display screen into a plurality of sections according to the process steps, wherein each section of video comprises a manufacturing step of the handicraft; 2. sequentially marking the video segments of each production step; 3. extracting a playing picture at the beginning and a playing picture at the end of each video segment as a comparison picture of the video segment; 4. sequentially marking the exhibition stands corresponding to each video segment according to the marking sequence of the marked video segments; 5. the second camera is used for acquiring a playing picture of a display screen in the exhibition hall and lighting pictures of the light sources of all the exhibition stands, and extracting the occurrence time point information of the contrast pictures in the pictures and the lighting time point information and the closing time point information of the light sources on all the exhibition stands by acquiring the pictures of the playing picture in the display screen so as to determine the playing time information of all the video segments and the lighting time information of the light sources on all the exhibition stands; 6. judging according to the relationship between the lighting time point and the closing time point of the light source of the exhibition stand and the playing time of each video segment, and judging that the visual module works in fault when the actual advanced lighting time T3 of the light source of the exhibition stand meets the actual advanced closing time T4 meets (-T3-T2) 'T2) (-T3-T2)' T2) > is not less than 60%.

Further, the lighting time of the light source of the exhibition stand is determined by the method of: the method comprises the following steps that 10-20 seconds before playing of a video segment corresponding to the first video production step, the light source of the corresponding exhibition stand starts to be turned on, 5-10 seconds before the video segment is played, the light source of the corresponding exhibition stand is turned off, and the turn-on time of the light source of the exhibition stand corresponding to the subsequent video segment is determined by the following formula: the duration of the video segment is T1, the duration of the previous video segment is T2, and the duration of the next video segment is T3, then T1 is (T2/T1) & + 10, T2 is (T1/T3) & + 5, & is a time correction coefficient, the value range is 0.1-10, wherein T1 is the time when the light source of the video segment corresponding to the exhibition stand of the video segment is turned on in advance before the video segment starts playing; t1 is the time when the light source of the exhibition stand corresponding to the video segment is turned off in advance after the video segment is played; through this kind of limited mode, can extinguish the stand that corresponds before one section preceding video broadcast is accomplished, remind the visitor to carry out the explanation of next stage, and light the stand that next step video corresponds in advance, thereby can make spectator know the handicraft place position that next step corresponds, thereby can make spectator can be better find corresponding handicraft according to the guide of light source, play better vision construction effect, make spectator can be better understand the preparation flow to this handicraft, and make the tourist can more deep understanding handicraft through the explanation of handicraft and preparation flow, improve the glamour of tourism culture.

Furthermore, the second acquisition module comprises an optical sensor arranged on each exhibition stand, the optical sensor is used for detecting the light emitting condition of the light source, the light emitting starting time point and the light emitting closing time point of each exhibition stand light source can be detected through the optical sensor, the light emitting time of the light source is confirmed again, and the accuracy is ensured; in addition, the light sensor can also acquire the light-emitting brightness of the light source and monitor the light-emitting brightness of the light source; the monitoring module receives information transmitted by the optical sensor, judges that the light source fails when the brightness of the light source does not meet the requirement, and sends data to the alarm device, and the alarm device sends out an alarm signal in time.

Specifically, wherein the information that the second collection module conveys to alarm module includes the positional information of each exhibition room, the time information of the video section of display screen broadcast in every exhibition room, the positional information of the stand in every exhibition room, every the illumination intensity information of the light source on the stand on light-on time information, closing time information and the light source on every stand, alarm module includes the display screen, includes the server, is connected with mobile terminal through the server, and mobile terminal is the handheld device of each maintenance person, and the display screen is used for showing the operating condition information of visual module in each exhibition room, shows on the display screen when visual module in the exhibition room breaks down, shows that the content includes the positional information of exhibition room, trouble information to send alarm information to mobile terminal through the server, in time remind maintenance person to maintain.

Example two

The invention provides a visual building method of the night visual building system for cultural tourism, which comprises the following steps with reference to fig. 5:

the method comprises the following steps that firstly, an exhibition hall is divided into a plurality of exhibition halls, and an information acquisition module, a control module and a vision module are arranged in each exhibition hall;

step two, detecting the position information of the tourist through an information acquisition module, and judging whether to open a visual module in the corresponding exhibition hall according to the position information of the tourist;

and step three, when the distance between the tourist and the exhibition hall is smaller than a preset value, controlling a visual module in the exhibition hall to work, and displaying the manufacturing process of the artware and the artware.

Furthermore, the vision module is including setting up display screen and a plurality of stand in the exhibition room, and every stand all is provided with the light source, "the vision module carries out work in the step three, demonstrates the preparation flow of handicraft and handicraft" include, broadcast the video of the preparation flow of handicraft through the display screen to set up the model of the different preparation steps of handicraft on each stand.

Further, the step of playing the video of the process flow of the handicraft through the display screen and setting the models of different process steps of the handicraft on each exhibition stand further comprises the following steps: dividing the played handicraft making flow video into different video segments according to the making steps of the handicraft; each video segment is correspondingly provided with a model of the handicraft in the step, the handicraft is sequentially arranged on different exhibition stands according to the playing sequence of the video segments, the exhibition stand work provided with the corresponding handicraft model is controlled when the video segments in the corresponding step are played, other exhibition stands stop working, the exhibition stand work comprises lighting the light source of the corresponding exhibition stand, and the exhibition stand stop working comprises turning off the light source of the corresponding exhibition stand.

Further, the method comprises the following steps of; the step two, the step of detecting the position information of the tourist by the acquisition module comprises the steps of acquiring image data of the position of the tourist by the acquisition module and filtering noise of the image by adopting a mask plate mode; extracting the contour information of each person on the image, determining the distance information of the person from the exhibition hall according to the contour information of the person and the position information of the exhibition hall in the exhibition hall, and comparing the contour information of the person in the image information acquired before and after the video, thereby determining the action track of the tourist.

Further, the method comprises the following steps of; in the second step, "judging whether to open the visual module in the corresponding exhibition hall according to the position information of the tourist" includes: when the action track of the tourist is close to the exhibition hall and the distance between the position of the tourist and the exhibition hall is less than a preset threshold value and the distance is kept to be more than or equal to 5 seconds, the tourist is judged to have the watching requirement, and then the control module controls the visual module in the exhibition hall to work; when the action track of the tourist, the distance between the tourist and the exhibition hall and any value for keeping the distance do not meet the requirements, the tourist is judged not to have the watching requirement, and then the control module controls the vision module in the exhibition hall not to work or stop working.

Further, the method comprises the following steps of; the exhibition hall comprises a control module, an information acquisition module and a vision module, wherein the control module is used for controlling the vision module to stop working when the information acquisition module acquires that no tourist is in the exhibition hall and no tourist with watching demands exists.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.