Digital landscape signboard embedded with braille alphabets

Abstract

The utility model relates to the technical field of signboards, and discloses a digital landscape signboard embedded with braille alphabets. The technical problem that in the prior art, effective support for braille information transmission is lacked, and the requirement of visually impaired people for obtaining information through tactile perception cannot be met is solved. The device comprises a vertical rod, a plurality of signboards facing different directions are arranged above the vertical rod, a braille digital signboard is arranged in the middle of the vertical rod, and the braille digital signboard comprises a data input module, a main control module and a driving module. The data input module comprises a USB flash disk inserted into the signboard and a plurality of keys arranged on the surface of the signboard; the main control module comprises an STM32 main control chip; the driving module comprises a visual driving circuit, an auditory driving circuit and a tactile driving circuit. According to the utility model, a more comprehensive, convenient and accurate information acquisition mode is provided for visually impaired people, and the barrier-free process of public facilities is powerfully promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of signboards, in particular to a digital landscape signboard embedded with Braille. Background Art

[0002] With the progress of social civilization and the continuous improvement of barrier-free facilities, the design and functional requirements of landscape signs are becoming increasingly refined. Traditional landscape signs mainly rely on text and graphic information transmission, but for the visually impaired, it is difficult for them to obtain information when visiting public places because they cannot read directly. In recent years, although Braille signs have appeared, most of them are still limited to static information display, inconvenient to update and single function, and cannot meet the needs of visually impaired people for real-time and dynamic information acquisition. At the same time, the rapid development of digital technology has brought new possibilities for solving this problem.

[0003] Chinese patent document 202010281359 in the prior art discloses a digital product identification plate and a product identification device, wherein the digital product identification plate includes a plastic injection-molded identification plate body and a product connecting belt, wherein the product connecting belt is connected to the identification plate body, and product information is laser ablated on the side of the identification plate body, and the digital product identification plate is connected to the corresponding product through the product connecting belt.

[0004] However, in the implementation of the above scheme, there are at least the following technical problems: in the existing technology, digital signboards focus on the visual and auditory experience of ordinary audiences. In terms of barrier-free facility design, the special needs of the visually impaired are not taken into consideration enough. There is a lack of effective support for the transmission of Braille information, which cannot meet the needs of the visually impaired to obtain information through tactile perception. There is a lack of products that combine digital information with Braille. Therefore, it is urgent to propose a digital landscape signboard embedded with Braille. Summary of the invention

[0005] In view of the above technical problems, the present disclosure provides a digital landscape sign embedded with Braille, which solves the technical problems that the existing technology does not take into account the special needs of the visually impaired group in the design of barrier-free facilities, lacks effective support for Braille information transmission, cannot meet the needs of visually impaired people to obtain information through tactile perception, and lacks products that combine digital information with Braille. The sign can dynamically combine digital information with Braille dot matrix to achieve real-time update and touch perception of information, effectively filling the gap in barrier-free information transmission for the visually impaired in the market, and further promoting the barrier-free process of public facilities. By integrating advanced electromagnetic drive technology, Braille dot matrix display technology and voice broadcast function, it aims to provide more convenient and efficient information acquisition services for the visually impaired, and enhance their travel experience and social participation.

[0006] According to one aspect of the present disclosure, there is provided a digital landscape sign embedded with braille, comprising a pole, a plurality of signboards facing different directions are arranged above the pole, a braille digital signboard is arranged in the middle of the pole, the braille digital signboard comprises a data input module, a main control module, and a drive module connected in sequence along a signal flow direction; the data input module comprises a U disk that can be inserted into the signboard and a plurality of buttons arranged on the surface of the signboard; the main control module comprises an STM32 main control chip; the drive module comprises a visual drive circuit, an auditory drive circuit, and a tactile drive circuit; the visual drive circuit comprises a screen that can receive a control signal output by the main control chip; the auditory drive circuit comprises a speaker; the tactile drive circuit comprises a braille point display module, the braille point display module comprises a plurality of independently moving braille contacts, and the braille contacts are connected to the contact drive circuit.

[0007] The screen includes an LCD screen with an RGB interface, and the LCD screen is connected to the main control chip via an FPC flexible circuit board.

[0008] The visual driving circuit also includes a data cache chip, and the control signal output end of the main control chip is connected to the screen via the data cache chip.

[0009] The auditory drive circuit also includes a speech synthesis chip, the control signal input end of the speech synthesis chip is connected to the main control chip via a communication bus, the audio signal output end of the speech synthesis chip is connected to a digital-to-analog conversion chip, and the output end of the digital-to-analog conversion chip is connected to a speaker via a power amplifier chip;

[0010] The Braille display module includes 120 Braille contacts driven by electromagnetic coils.

[0011] The contact driving circuit comprises a latch chip, the current output end of the latch chip is connected to an amplifier, the amplifier comprises a Darlington tube array chip, the Darlington tube array chip is internally integrated with 8 groups of Darlington tubes, and the Darlington tube internally comprises two NPN triodes cascaded.

[0012] The beneficial effects of the utility model are:

[0013] The integration of traditional signboards and digital Braille technology not only meets the information needs of general tourists, but also considers the needs of the visually impaired. It transmits information through the triple channels of vision, hearing and touch, achieving barrier-free information exchange.

[0014] The USB flash drive that can be inserted into the sign can be used to quickly and easily update and customize the displayed content. The multiple buttons on the surface of the sign make it easy for the visually impaired to operate and select the required information.

[0015] The STM32 main control chip is used as the core processor to ensure effective management and precise control of each functional module, thereby achieving coordinated work of the visual, auditory, and tactile drive circuits.

[0016] The LCD screen in the visual drive circuit provides rich colors and smooth picture display; the auditory drive circuit converts text into speech with the help of a speech synthesis chip, and combines the digital-to-analog conversion chip and the power amplifier chip to ensure that the voice broadcast is clear and loud; the Braille display module of the tactile drive circuit uses an electromagnetic coil to drive 120 independently moving Braille contacts, allowing the visually impaired to perceive real-time changing Braille information through touch.

[0017] The contact drive circuit uses a latch chip to ensure stable transmission of the control signal, and amplifies the signal through a Darlington array chip. The cascade design of two NPN transistors integrated in each Darlington greatly improves the driving capability and ensures the accuracy and stability of the Braille contact action. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a digital landscape sign embedded with Braille;

[0019] Figure 2 This is a front view of a digital landscape sign with embedded Braille;

[0020] Figure 3 The logic diagram of a digital landscape sign embedded with Braille;

[0021] Figure 4 This is the schematic diagram of the RGBLCD connection socket circuit;

[0022] Figure 5 This is the circuit schematic diagram of the data cache chip;

[0023] Figure 6 This is the circuit schematic diagram of the speech synthesis chip;

[0024] Figure 7 This is the schematic diagram of the digital-to-analog conversion and audio power amplifier circuit;

[0025] Figure 8 This is the schematic diagram of the contact drive circuit;

[0026] Fig. 9 This is the schematic diagram of the button and USB interface circuit;

[0027] The names of the components in the figure are: 1. Pole; 2. Signboard; 3. Braille digital signboard; 4. Button; 5. Screen; 6. Braille contacts. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example 1

[0029] This example discloses a digital landscape sign with embedded Braille, see Figures 1 to 9 , including a pole 1, a plurality of signboards 2 facing different directions are arranged above the pole 1, a Braille digital signboard 3 is arranged in the middle of the pole 1, and the Braille digital signboard includes a data input module, a main control module, and a drive module connected in sequence along the signal flow direction; the data input module includes a U disk that can be inserted into the signboard and a plurality of buttons 4 arranged on the surface of the signboard; the main control module includes an STM32 main control chip; the drive module includes a visual drive circuit, an auditory drive circuit, and a tactile drive circuit; the visual drive circuit includes a screen 5 that can receive the control signal output by the main control chip; the auditory drive circuit includes a speaker; the tactile drive circuit includes a Braille dot display module, and the Braille dot display module includes a plurality of independently moving Braille contacts 6, and the Braille contacts 6 are connected to the contact drive circuit. Button and USB interface circuit as shown Fig. 9 shown.

[0030] The screen 5 includes an LCD screen with an RGB interface, and the LCD screen is connected to the main control chip via an FPC flexible circuit board. The circuit diagram of the connection socket is as follows Figure 4 shown.

[0031] The visual drive circuit also includes a data cache chip. The control signal output end of the main control chip is connected to the screen through the data cache chip. The circuit diagram of the data cache chip is shown in FIG. Figure 5 shown.

[0032] The auditory drive circuit also includes a speech synthesis chip, the control signal input end of the speech synthesis chip is connected to the main control chip via a communication bus, the audio signal output end of the speech synthesis chip is connected to the digital-to-analog conversion chip, and the output end of the digital-to-analog conversion chip is connected to the speaker via the power amplifier chip; the circuit diagram of the speech synthesis chip is as shown in Figure 6 As shown. The digital-to-analog conversion and audio power amplifier circuit is as follows Figure 7 shown.

[0033] The Braille display module includes 120 Braille contacts 6 driven by electromagnetic coils.

[0034] The contact driving circuit includes a latch chip, the current output end of the latch chip is connected to an amplifier, the amplifier includes a Darlington transistor array chip, the Darlington transistor array chip is internally integrated with 8 groups of Darlington transistors, and the Darlington transistors internally include two NPN transistors in cascade. Figure 8 shown.

[0035] During the working process, a USB flash drive is used as the input storage medium to automatically obtain the text content in the USB flash drive, convert ordinary text into Braille, and present the text content in a visual, auditory, and tactile way: display text and Braille shapes on the screen to facilitate the guidance of sighted people; read the content on the screen through voice for the visually impaired group to listen and read; dynamically display the converted Braille content on the Braille display module, so that the visually impaired group can use their fingertips to read. Thereby improving reading efficiency and interactive experience. The screen display module consists of a screen and a data cache chip. The screen is used to display text and corresponding Braille shapes, and the data cache chip temporarily stores the data sent to the screen by the main control. The visually impaired group cannot obtain text information through the screen, but the sighted people can assist the visually impaired group to understand the meaning of the text based on the text and Braille shapes on the screen. Use Winbond's W9825G6KHSDRAM cache chip and ALIENTEK's 7-inch RGBLCD screen as visual output devices. Select the CSK4002 speech synthesis chip of Lingsi to convert the input text into digital signal output. Design digital-to-analog conversion and power amplifier circuits to drive the speaker to broadcast voice. The electromagnetically driven braille display module has 120 independently movable braille contacts, which need to be independently controlled to display braille content. The ULN2803A chip is used as the amplifier chip of the drive signal to improve the load capacity, and the 74HC573D latch chip is used to expand the IO pins, reduce the consumption of hardware resources, and effectively complete the braille point drive control. The STM32F429BIT6 chip of STMicroelectronics (ST) is selected as the main control chip of the system, which is responsible for completing the processing of text data in the U disk and braille conversion, monitoring the key operations of the visually impaired group to realize the corresponding key functions, and controlling the normal operation of the audio-visual touch drive circuit.

[0036] The driving design of the Braille dot display module adopts the electromagnetic principle, and the electromagnetic force generated when the coil is energized drives the rise and fall of the Braille contacts. When the coil is energized, the iron core inside the solenoid will be magnetized to form a strong magnetic field, which acts on the armature needle, causing it to move upward. The rise of the armature needle will cause the Braille contacts to rise accordingly, thereby realizing the protrusion of the Braille dots, making it easier for the blind to perceive information through touch. In the power-off state, the previously compressed return spring loses the effect of the electromagnetic force and returns to its original state, releasing the elastic force to push the armature needle back down. At the same time, under the action of the Braille contacts' own gravity, they also drop synchronously and return to their original position, making the Braille dots hidden and returning to a flat state.

[0037] Although some preferred embodiments of the utility model have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the utility model.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of this application and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A digital landscape sign with embedded Braille, characterized in that: It comprises a vertical pole, a plurality of signboards facing different directions are arranged above the vertical pole, a Braille digital signboard is arranged in the middle of the vertical pole, the Braille digital signboard comprises a data input module, a main control module, and a drive module which are sequentially connected along the signal flow direction; the data input module comprises a U disk which can be inserted into the signboard and a plurality of buttons arranged on the surface of the signboard; the main control module comprises an STM32 main control chip; the drive module comprises a visual drive circuit, an auditory drive circuit, and a tactile drive circuit; the visual drive circuit comprises a screen which can receive the control signal output by the main control chip; the auditory drive circuit comprises a loudspeaker; the tactile drive circuit comprises a Braille dot display module, the Braille dot display module comprises a plurality of independently moving Braille contacts, and the Braille contacts are connected to the contact drive circuit.

2. The digital landscape sign with embedded Braille as claimed in claim 1, characterized in that: The screen comprises an LCD screen with an RGB interface, and the LCD screen is connected to a main control chip via an FPC flexible circuit board.

3. The digital landscape sign with embedded Braille as claimed in claim 1, characterized in that: The visual driving circuit also includes a data cache chip, and the control signal output end of the main control chip is connected to the screen via the data cache chip.

4. The digital landscape sign with embedded Braille as claimed in claim 1, characterized in that: The auditory drive circuit also includes a speech synthesis chip, a control signal input end of the speech synthesis chip is connected to a main control chip via a communication bus, an audio signal output end of the speech synthesis chip is connected to a digital-to-analog conversion chip, and an output end of the digital-to-analog conversion chip is connected to a speaker via an amplifier chip.

5. The digital landscape sign with embedded Braille as claimed in claim 1, characterized in that: The Braille display module includes 120 Braille contacts driven by electromagnetic coils.

6. The digital landscape sign with embedded Braille as claimed in claim 1, characterized in that: The contact driving circuit comprises a latch chip, the current output end of the latch chip is connected to an amplifier, the amplifier comprises a Darlington tube array chip, the Darlington tube array chip is internally integrated with 8 groups of Darlington tubes, and the Darlington tube internally comprises two NPN triodes cascaded.

Images