Blind person traffic signal prompting equipment based on low-power-consumption RSSI Bluetooth

Abstract

The utility model belongs to the technical field of Bluetooth equipment, and discloses blind person traffic signal prompting equipment based on low-power RSSI Bluetooth, which is used for being matched with a Bluetooth terminal arranged on an intersection signal lamp to carry out signal receiving and transmitting and intersection passing prompting, and comprises a shell and a circuit board arranged in the shell, the circuit board is connected with a Bluetooth module, a loudspeaker module and a battery through pin welding; the front surface of the housing is provided with a horn mouth corresponding to the internal horn module, and the horn mouth is filled with waterproof sound transmission cotton. According to the utility model, the prompting device worn on the body of the visually impaired person can be identified at the intersection provided with the corresponding Bluetooth terminal, and after the visually impaired person wearing the prompting device is captured within a certain range through the low-power-consumption Bluetooth technology, information is pushed to guide pedestrians to cross the street. Compared with existing camera recognition auxiliary equipment, the camera recognition auxiliary equipment is low in cost, and compared with existing GPS auxiliary equipment, the camera recognition auxiliary equipment is high in accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of Bluetooth terminal equipment technology, specifically relating to a traffic signal prompting device for the blind based on low-power RSSI Bluetooth. Background Technology

[0002] Visually impaired people rely primarily on traditional methods when crossing intersections: first, auditory assistance, such as traffic light buzzers or voice announcements, but environmental noise can easily mask the warnings and fail to convey the remaining time; second, tactile assistance, relying on tactile paving for the visually impaired, but this carries the risk of being blocked by obstacles; and third, reliance on assistance from others, which presents high communication costs and privacy concerns. These methods prevent blind people from accurately judging their distance from traffic light poles (such as whether they are in a safe waiting area), making it difficult to obtain real-time traffic light switching times, and their reliability is significantly reduced at night or in rainy or snowy weather.

[0003] While existing assistive devices offer some help, they have significant drawbacks. Common devices that use GPS positioning to provide movement guidance for visually impaired individuals are prone to errors exceeding 10 meters due to obstructions at intersections. Camera-based solutions also fail in low light or inclement weather. Traditional Bluetooth beacons only broadcast in one direction and cannot dynamically sense the user's location; voice prompts are susceptible to traffic noise and cannot adjust their content based on distance. These technologies fail to meet the core needs of blind individuals for real-time traffic light status, accurate location, and environmental adaptability. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a traffic signal prompting device for the blind based on low-power RSSI Bluetooth, which is designed to work with Bluetooth terminals placed at intersections to provide assisted crossing prompts for multiple visually impaired individuals within a certain range.

[0005] The technical solution adopted in this utility model is as follows:

[0006] In the first aspect, this utility model provides a traffic signal prompting device for the blind based on low-power RSSI Bluetooth, which is used to cooperate with a Bluetooth terminal set on a traffic light at an intersection to transmit and receive signals and provide intersection passage prompts. It includes a housing and a circuit board set inside the housing. A Bluetooth module, a speaker module and a battery are soldered to the circuit board via pins.

[0007] The front of the housing is provided with a horn opening corresponding to the internal horn module, and the horn opening is filled with waterproof and sound-permeable cotton.

[0008] In conjunction with the first aspect, the present invention provides a first embodiment of the first aspect, wherein an annular groove is provided at the inner port of the horn mouth, and a waterproof membrane sleeve is connected in the annular groove by adhesive, and the waterproof and sound-permeable cotton is disposed on the outer side of the waterproof membrane sleeve.

[0009] In conjunction with the first aspect, this utility model provides a second embodiment of the first aspect, wherein the front of the housing is further provided with a through hole for the button provided inside to pass through, and the circuit board is connected to a switch detection module corresponding to the button by pin soldering.

[0010] In conjunction with the first aspect or several embodiments of the first aspect, this utility model provides a third embodiment of the first aspect, wherein the housing includes a top cover and a bottom cover that are interlocked with each other, the circuit board is disposed in a groove in the bottom cover, and the bottom cover has an annular waterproof strip extending outward from the groove and being pressed by the top cover to form a sealing structure.

[0011] In conjunction with the third embodiment of the first aspect, this utility model provides a fourth embodiment of the first aspect, wherein the inner end face of the top cover is provided with a clearance groove that forms a clearance space for the corresponding circuit board.

[0012] In conjunction with the fourth embodiment of the first aspect, this utility model provides a fifth embodiment of the first aspect, wherein the top cover has a recessed groove in the clearance groove, and a microstrip antenna for connecting a Bluetooth module is attached to the recessed groove.

[0013] In conjunction with the fourth embodiment of the first aspect, this utility model provides a sixth embodiment of the first aspect, wherein the Bluetooth module is an integrated structure with a microstrip antenna.

[0014] In conjunction with the fourth embodiment of the first aspect, this utility model provides a seventh embodiment of the first aspect, wherein the bottom shell is provided with a clearance for avoiding the connection port for connecting external lines on the circuit board, and the connection port is of TYPE-C specification.

[0015] In conjunction with the fourth embodiment of the first aspect, this utility model provides an eighth embodiment of the first aspect, wherein a vibrator is electrically connected to the circuit board, and the vibrator is attached and fixed to the top cover or bottom shell.

[0016] In conjunction with the fourth embodiment of the first aspect, this utility model provides a ninth embodiment of the first aspect, wherein the top cover and the bottom shell are provided with corresponding hanging rope holes.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) The prompting device worn by visually impaired people in this utility model can be identified at intersections with corresponding Bluetooth terminals. After capturing visually impaired people wearing the prompting device within a certain range through low-power Bluetooth technology, information is pushed to guide pedestrians to cross the street. Compared with existing camera recognition auxiliary devices, it has a lower cost and higher accuracy compared with existing GPS auxiliary devices.

[0019] (2) The prompting device of this utility model integrates a speaker module and a vibrator, which can provide multimodal feedback according to the distance between the user and the traffic light and the status of the traffic light, thereby avoiding information overload and reducing environmental noise interference.

[0020] (3) The housing of the device of this utility model can be made of a thicker material to improve its protective performance. At the same time, it can open a horn mouth for the horn module and block the horn mouth by filling it with waterproof and sound-permeable cotton and waterproof membrane sleeve, so as to prevent external impurities and moisture from entering while ensuring effective sound transmission. Attached Figure Description

[0021] Figure 1 This is an isometric view of the prompting device in an embodiment of this utility model;

[0022] Figure 2 This is a front view of the prompting device in an embodiment of this utility model;

[0023] Figure 3 This is a first isometric view of the device in the disassembled state in this embodiment of the present invention;

[0024] Figure 4 This is a second isometric view of the device in the disassembled state in this embodiment of the present invention;

[0025] Figure 5 This is a diagram showing the association of functional modules within the device in this embodiment of the utility model;

[0026] Figure 6 This is a schematic diagram illustrating the relationship between the prompting device and the signal light docking device in this embodiment of the utility model.

[0027] In the diagram: 1-Top cover, 2-Bottom shell, 3-Hanging hole, 4-Button, 5-Speaker mouth, 6-Waterproof and sound-permeable cotton, 7-Connection port, 8-Speaker module, 9-Vibrator, 10-Bluetooth module, 11-Battery, 12-Circuit board, 13-Waterproof adhesive strip, 14-Waterproof membrane cover, 15-Groove groove. Detailed Implementation

[0028] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] Example 1:

[0036] This embodiment discloses a traffic signal prompting device for the blind based on low-power RSSI Bluetooth. The purpose is to guide and assist visually impaired people when crossing intersections with traffic lights. The device can provide prompts based on the real-time status of the traffic lights and can provide directional guidance by determining the relative position. It can also cover the entire street and community to achieve precise road-level guidance and prompts.

[0037] The prompting device is a terminal device worn by visually impaired individuals. It works in conjunction with Bluetooth terminals placed at intersections or other locations on the road. These terminals send signals within a certain range, detect and connect to several prompting devices within the coverage area, and then send signals to the prompting devices for guidance.

[0038] Specifically, the device includes a housing and a circuit board 12 disposed inside the housing. The circuit board 12 is provided with several functional modules, including a battery 11, a Bluetooth module 10, and a speaker module 8. The circuit board 12 has a connection port 7 for connecting to external lines. The connection port 7 can charge the battery 11 and also interact with the processing module and storage module on the circuit board 12. The connection port 7 can be disposed on the housing as a female connector or on the surface of the housing as an external metal contact.

[0039] The processing module on circuit board 12 is a microcontroller, and the storage module contains corresponding data, enabling it to decode and recognize Bluetooth signals. This device employs two mechanisms: First, the device itself stores a large amount of voice information. In this case, the device only needs to process and play the corresponding voice information based on the signal light status and location information sent by the Bluetooth terminal. This means that most of the prompt data is stored locally, and status confirmation is only required based on the signal from the Bluetooth terminal. Second, the device acts solely as a decoding and processing unit, while all voice prompts are provided by the Bluetooth terminal.

[0040] Furthermore, refer to Figures 1-6 This embodiment provides a specific implementation plan for the prompting device and the intersection prompting system composed of the prompting device and a Bluetooth terminal.

[0041] The device housing consists of a top cover 1 and a bottom shell 2 fastened together by a snap-fit ​​structure. The bottom shell 2 has a 3mm deep groove to accommodate the circuit board 12. A 2mm wide annular waterproof strip 13 (made of EPDM rubber) extends outward from the groove on the bottom shell 2. When the top cover 1 is fastened, the strip is squeezed to form an IP67-level sealing structure. The Bluetooth module 10 soldered onto the circuit board 12 uses an LE5010 chip with an integrated microstrip antenna (the antenna area accounts for 30% of the module's surface area) and is directly connected to the circuit board 12 via solder pads.

[0042] In another embodiment, a 1mm deep clearance groove 15 is machined on the inner side of the top cover 1. A microstrip antenna with dimensions of 15×8mm is attached to the groove using conductive adhesive. The antenna is soldered to the feed point of the Bluetooth module 10 on the circuit board 12 via a 0.1mm diameter enameled wire. A 0.3mm diameter vent hole is formed at the bottom of the clearance groove 15, and the hole is filled with expanded polytetrafluoroethylene film to prevent liquid intrusion.

[0043] Furthermore, the top cover 1 has an 8mm diameter flared opening 5 on the front, and an annular groove with a depth of 0.5mm is machined at the inner end. A waterproof membrane sleeve 14 (made of PU, 0.05mm thick) is coated with UV-cured adhesive and fixed inside the groove. Waterproof and sound-permeable cotton 6 (density 20kg / m³) is also included. 3 A 3mm thick membrane is filled on the outside of the diaphragm sleeve and precisely bonded to the edge of the horn opening 5 through a die-cutting process. The sound transmission loss test value is ≤1.5dB.

[0044] Furthermore, a 4mm diameter through-hole is opened on the front of the top cover 1, through which the internal button 4 extends to the outside of the housing. The switch detection module soldered on the circuit board 12 adopts a voltage divider circuit design. One end of the button 4 is connected to a 3.3V power supply. The microcontroller's I / O port detects the voltage change at the voltage divider point, and combined with a 50ms software debouncing algorithm, the button 4's status is recognized. This button 4 is a customizable button that can be programmed to achieve various functional requirements by utilizing the pressing time and frequency. For example, a long press turns the device on or off, which can be indicated by the speaker. A single short press immediately repeats the current information via voice broadcast, such as the current indicator light status, thus ensuring repeated confirmation if the voice broadcast is not heard clearly. Alternatively, a single short press can also play the current device battery information. Multiple short presses can achieve functions such as volume control, but the default is generally the maximum playback volume.

[0045] The bottom shell 2 has a clearance opening corresponding to the TYPE-C interface of the circuit board 12, and a flexible silicone dust plug is placed on the outside of the interface. The charging management chip on the circuit board 12 adopts a linear charging scheme, supports 5V / 1A input, and the battery 11 is a 300mAh lithium polymer battery 11, with a tested battery life of up to 48 hours (Bluetooth scanning interval of 1 second).

[0046] In this embodiment, the circuit board 12 is also equipped with a vibrator 9. The vibrator 9 uses an eccentric motor vibration mode, with a voltage of 3V and an amplitude of 0.5mm. The vibrator 9 is fixed to the inside of the top cover 1 with double-sided adhesive, and its drive circuit is connected to the PWM pin of the microcontroller. The vibration intensity is divided into three levels: level 0 (stop), level 1 (1Hz low frequency), and level 3 (3Hz high frequency), which are controlled by PWM signals with different duty cycles. Different vibration intensities and frequencies represent different information. For example, low-frequency vibration indicates that the current light is red, while high-frequency vibration indicates that the current light is green. The remaining light time can also be indicated by the frequency change.

[0047] Furthermore, the top cover 1 and the bottom shell 2 are symmetrically equipped with lanyard holes 3, with metal bushings embedded in the holes to prevent wear. The lanyard is made of 5mm wide nylon braided strap, and load-bearing tests show that it can withstand a 5kg pulling force without breaking, meeting daily carrying needs.

[0048] The above embodiments achieve device function integration through modular design. The waterproof structure (adhesive strip + membrane sleeve + sound-permeable cotton), antenna optimization (integrated / external), multimodal feedback (voice + vibration) and other technical points are all realized through specific structural design. Third-party testing and verification have shown that the device meets performance indicators such as IP67 protection level, -40dBm receiving sensitivity and 100,000 button lifespan.

[0049] This utility model is not limited to the optional embodiments described above, and anyone can derive other various forms of products under the guidance of this utility model. The specific embodiments described above should not be construed as limiting the scope of protection of this utility model. The scope of protection of this utility model shall be determined by the claims, and the description can be used to interpret the claims.

Claims

1. A traffic signal prompting device for the blind based on low-power RSSI Bluetooth, used in conjunction with a Bluetooth terminal installed on a traffic light at an intersection for signal transmission and reception and intersection passage prompts, characterized in that: The shell and the circuit board (12) arranged in the shell, the Bluetooth module (10), the loudspeaker module (8) and the battery (11) are connected by pin soldering on the circuit board (12); The front of the shell is provided with a loudspeaker port (5) corresponding to the internal loudspeaker module (8), and the loudspeaker port (5) is filled with waterproof sound-absorbing cotton (6).

2. The low-power consumption RSSI Bluetooth-based traffic signal prompting device for the blind according to claim 1, characterized in that: An annular groove is arranged at the port of the inside of the loudspeaker port (5), and a waterproof film sleeve (14) is connected in the annular groove by adhesive, and the waterproof sound-absorbing cotton (6) is arranged outside the waterproof film sleeve (14).

3. The low-power RSSI Bluetooth-based traffic signal prompting device for the blind according to claim 1, characterized in that: The front of the shell is also provided with a through hole for the button (4) arranged inside to pass through, and the circuit board (12) is connected with a switch detection module corresponding to the button (4) by pin soldering.

4. The low-power RSSI Bluetooth-based traffic signal prompting device for the blind according to any one of claims 1-3, characterized in that: The shell includes a top cover (1) and a bottom shell (2) that are buckled to each other, the circuit board (12) is arranged in the groove of the bottom shell (2), and the bottom shell (2) is provided with a waterproof rubber strip (13) outside the groove, which is annular and is pressed and combined with the top cover (1) to form a sealing structure.

5. The low-power RSSI Bluetooth-based traffic signal prompting device for the blind according to claim 4, characterized in that: The inside end surface of the top cover (1) is provided with an avoidance groove (15) corresponding to the circuit board (12) to form an avoidance space.

6. The low-power consumption RSSI Bluetooth-based traffic signal prompting device for the blind according to claim 5, characterized in that: The top cover (1) is provided with a sunken groove in the avoidance groove (15), and a microstrip antenna connected with the Bluetooth module (10) is attached in the sunken groove.

7. The low-power consumption RSSI Bluetooth-based traffic signal prompting device for the blind according to claim 5, characterized in that: The Bluetooth module (10) is an integrated structure with a microstrip antenna.

8. The low-power RSSI Bluetooth-based traffic signal prompting device for the blind according to claim 5, characterized in that: The bottom shell (2) is provided with an avoidance port for avoiding the wiring port (7) connected with the external circuit arranged on the circuit board (12), and the wiring port (7) is of TYPE-C specification.

9. The low-power consumption RSSI Bluetooth-based traffic signal prompting device for the blind according to claim 5, characterized in that: The circuit board (12) is conductively connected with a vibrator (9), and the vibrator (9) is fixedly attached with the top cover (1) or the bottom shell (2).

10. The low-power RSSI Bluetooth-based traffic signal prompting device for the blind according to claim 5, characterized in that: The top cover (1) and the bottom shell (2) are both provided with corresponding rope holes (3).

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