阅读说明：本技术 一种楼宇外墙体可见光信息传达的装置和方法 (Device and method for transmitting visible light information of building outer wall ) 是由 董辰 杨鸿柳 吴限 于 2021-07-07 设计创作，主要内容包括：本发明提供一种楼宇外墙体可见光信息传达的装置和方法。该方法包括信息发射装置及信息接收装置。所述信息发射装置由多个LED灯组成,所述LED灯发出光波的波长和强度均可以改变,所述信息发射装置可以将设定的信息进行编码。所述信息发射装置发出的信息经墙体反射被所述信息接收装置接收。所述信息接收装置可以捕获信息发射装置传来的信息,所述信息接收装置可以对可见光信息进行解码,并将解码所得的信息可视化。(The invention provides a device and a method for transmitting visible light information of an outer wall of a building. The method comprises an information transmitting device and an information receiving device. The information transmitting device is composed of a plurality of LED lamps, the wavelength and the intensity of light waves emitted by the LED lamps can be changed, and the information transmitting device can encode set information. The information sent by the information transmitting device is reflected by the wall body and received by the information receiving device. The information receiving device can capture the information transmitted by the information transmitting device, and the information receiving device can decode the visible light information and visualize the decoded information.)

1. An apparatus and a method for visible light information communication of building outer wall bodies comprise:

the light source emitting device and the camera shoot videos with visible light information, extract the visible light information from the videos, process the visible light information, display target information by using electronic equipment, and are used in combination with other functions.

2. The light source emitting device of claim 1, consisting of a plurality of LED lamps.

3. The LED lamp of claim 2, wherein the lamp is controlled by an electrical signal, the lamp being fluorescent or non-fluorescent in nature, all changes in information being controlled by changes in the electrical signal.

4. The visible-light information of claim 1, wherein the intensity of the light wave, the wavelength of the light wave, and the order of change of the intensity and wavelength of the light wave are different for different information. The change generated by visible light can only be sensed by a machine, and cannot be sensed by human eyes.

5. The video with visible light information of claim 1, wherein the video length is long enough to contain all information of visible light variations.

6. The method of claim 1, wherein all information of visible light is derived by detecting each frame of video.

7. All information in visible light according to claim 6, characterized by containing target information, and other repetitive or redundant information.

8. The processing of visible light information according to claim 1, wherein duplicate or redundant information is removed from all information of the visible light and the corresponding code of the visible light is decoded.

9. The method as claimed in claim 1, wherein the electronic device is a mobile phone, a tablet computer, a notebook computer, or the like having a display screen. The target information may be text, pictures, video, multimedia files, Uniform Resource Locator (URL), and the like.

10. Use of the device according to claim 1 in combination with other functions, possibly in combination with a handset positioning function, enabling navigation of the user to a destination. It is not limited to being combined with the positioning function and can be used in combination with any other combinable function.

The technical field is as follows:

the invention relates to the technical field of optical communication, in particular to a device and a method for transmitting information by utilizing visible light.

Background art:

night scene lighting is already very common in cities, attractions. At present, a large number of buildings use night scene appearance illumination. The lighting mode improves the aesthetic degree of buildings and scenic spots. Meanwhile, the purpose of the lighting is to enable the coming and going people to see the building body and the scenic spot, improve the popularity of the corresponding building and beautify the building and the nearby landscape. At present, the lighting devices only have a decoration function, but the lighting devices are only slightly improved to decorate the building body and transmit information, wherein the transmitted information can comprise any specified information such as building introduction and the like.

Visible light communication has been developed greatly and is currently in practical use both on land and underwater. Conventional visible light illumination requires a means for transmitting information: LED, a means for receiving information: PD. Wherein the speed of the LED can reach Gbps level. But typically the communication distance is limited. And the PD is a special device and is difficult to popularize on the portable device of the common user.

The invention content is as follows:

in order to solve the above problems, the present invention provides a system for transmitting visible light information of an external wall of a building.

The system is a one-way visible light communication system which takes a building, a landscape wall lighting LED as a transmitting end and an electronic equipment camera such as a mobile phone as a receiving end.

The system has the main function of transmitting arbitrarily specified information such as building information, scenic spot information and the like.

The implementation logic of the system is as follows in sequence: the method comprises the steps of enabling a light source emitting device to emit light to a building body, starting a camera preview stage, identifying flashing of building illumination, shooting a flashing video, identifying fixed fields contained in the flashing through an algorithm, obtaining content information corresponding to the fields, displaying the content information through a display device, and matching with an expansion function. The detailed block diagram is shown in fig. 1.

The light source emitting device consists of two or more LED lamps, light emitted by the LED lamps can be reflected through a building body, and the schematic diagram is shown in figure 2.

The LED lamp is controlled by voltage.

The LED lamp may be fluorescent or non-fluorescent.

The LED lamp is characterized by the intensity of light and the wavelength of the light. The particular combination of intensity and wavelength of light represents the particular encoded information.

The camera previews a program for identifying visible light information for opening the device.

The camera is a camera on an electronic product such as a mobile phone, a tablet computer and a notebook computer.

The identifying flashes of building lighting identifies intensities, wavelengths, and corresponding combined sequences of reflected light.

The flickering video is a continuous and sufficiently long video containing all information of the intensity, wavelength, and corresponding order of combination of the reflected light.

The recognition algorithm is a program that converts visible light into coded information.

The fixed fields contained in the flashes correspond one-to-one to the wavelength, intensity and their particular order of combination of light.

The content information may be obtained by decoding the obtained encoded information of the fixed field.

The content information may be URL links, pictures, videos, texts, etc.

The display device can be an electronic product with a display screen, such as a mobile phone, a tablet computer, a notebook computer and the like.

The expansion function can be a positioning function, and the user can be navigated to a destination by matching the expansion function and the positioning function.

The invention has the advantages that:

the function of the light on the surface of the building is expanded, the traditional light only has the functions of illumination and decoration, and the information transmission function is added on the basis of the functions.

When the system provided by the scheme is used for visible light identification, the system does not need to be directly aligned with a light source for shooting. The required information is taken from the reflected light of the light wave emitted by the light source. Because a light wave passes through the wall body and has a plurality of reflected lights, the requirement on the shooting angle can be greatly reduced by using the system provided by the scheme.

Description of the drawings:

the invention has the following drawings:

FIG. 1 is a block diagram of the implementation of the present invention

Fig. 2 is a schematic view of a building wall being polished

FIG. 3 schematic representation of a usage scenario of the present invention

FIG. 4 is a schematic diagram of an electronic device displaying visible light information

Detailed Description

The invention is further illustrated by the following examples and figures:

example 1: the tourist is 300 meters away from the west Ann wild goose tower, and the landscape lighting of the wild goose tower comprises light information emitted by the LED. The tourist uses the mobile phone to take a picture and preview the picture and aims at the wide goose tower, and the schematic diagram is shown in figure 3. After shooting, the tourist can see the introduction of the wild goose tower through the mobile phone, and the schematic diagram is shown in fig. 4. The introduction page includes navigation to the wide goose tower depending on the geographic location. The specific implementation process of the whole process is as follows:

the method comprises the steps of enabling a light source emitting device to emit light to a building body, starting a camera preview stage, identifying flashing of building illumination, shooting a flashing video, identifying fixed fields contained in the flashing through an algorithm, obtaining content information corresponding to the fields, displaying the content information through a display device, and matching with an expansion function.

The light source emitting device emits light onto the building body, wherein the intensity wavelength of the light is cyclically changed according to a certain rule according to the setting of the contained information. The light emitted by the light source may be fluorescent or non-fluorescent depending on a combination of environmental considerations and the like.

The user sees that there is a tower in the remote place and wants to know the relevant information of the tower.

The user takes out the mobile phone, aims the camera at a distant tower, starts the preview stage of the camera, and converts the main functions of the camera into the collection of visible light information.

And after the start of the preview stage is finished, the camera enters a continuous video shooting function to completely shoot the continuous change process of the visible light. A feature of this process is that the length of the video is long enough to contain all the information of the visible light that contains the information. If the video length is too short, information omission may occur.

And the related program analyzes the shot video, extracts the visible light information contained in the video, and obtains the information code by de-noising and de-duplicating the information.

And decoding the codes to obtain corresponding content information.

The information can be presented in various alternative forms, such as characters, pictures, videos, media files and the like, and also can be a URL (uniform resource locator) for linking other resources.

The mobile phone can select a proper presentation mode according to the presentation mode of the information.

The user can combine the extended function to carry out the next operation. For example, in combination with a location function whereby the user may navigate to a destination.

Example 2: in the classroom, the light on the platform in the classroom is photographed and previewed, so that a classroom course schedule is obtained.

In order to ensure the effect of class, a special light source is generally arranged on the platform of the classroom for adjusting the light on the platform.

Classroom schedules and other related information may be included in the light sources.

Information is stored in the intensity, wavelength, and combination of the light.

The lights on the lectern change constantly, but because these changes are extremely rapid and subtle, these changes are not visible to the human eye due to the persistence of vision effect. The change in light is visible to the machine.

A person who wants to obtain a schedule for a classroom course can turn on the phone and enter the preview phase.

And after the preview stage is started, the camera enters a continuous video shooting function. The whole photographing process is the same as step 4 in embodiment 1.

Since the light received by the system is reflected by a building such as a wall, the effect of photographing at various angles with respect to the platform is the same. This is more flexible than a direct-shot light source solution.

And acquiring relevant visible light information from the video, decoding the visible light information and other operations to acquire a corresponding course schedule, and displaying the course schedule in a proper mode.

The system of the present invention is not limited to the above two embodiments, and those skilled in the art can obtain other embodiments according to the technical solution of the present invention, and the system also belongs to the technical innovation scope of the present invention.