Intelligent blind sidewalk system

Abstract

The invention provides an intelligent blind sidewalk system. The intelligent blind sidewalk system comprises a plurality of intelligent blind sidewalk bricks, an intelligent blind sidewalk terminal and a system platform, the intelligent blind sidewalk brick comprises a brick body and an intelligent module arranged in the brick body, wherein the intelligent module comprises a wireless communication and positioning unit, a road surface state sensing unit, an information processing unit and a power supply management unit; the information processing unit is used for analyzing and processing the position information and the distance information acquired by the wireless communication and positioning unit and the road surface state information sensed by the road surface state sensing unit to generate corresponding prompt information or guide information; and the prompt information or the guide information is sent to the intelligent blind sidewalk terminal through the wireless communication and positioning unit. According to the invention, active perception and dynamic information prompt of the travel environment of the visually impaired people are realized, the use mode of passive prompt and static information of the traditional blind sidewalk is broken through, and safer, more accurate and more understandable travel guidance is provided for the visually impaired people while the basic tactile guidance function of the blind sidewalk is ensured.

Description

Technical Field

[0001] This invention relates to the field of intelligent transportation equipment technology, and in particular to an intelligent tactile paving system for the blind. Background Technology

[0002] With the accelerating aging of the population and the increasing demand from the public for accessible travel, ensuring the safe and independent travel of visually impaired individuals in urban public spaces has become a crucial issue in urban public service systems and smart city construction. Tactile paving, as an important infrastructure component of accessible travel systems, has been widely deployed in public places such as urban roads, subway stations, and entrances to commercial complexes, providing visually impaired individuals with basic directional guidance and environmental change alerts.

[0003] Existing tactile paving is typically constructed from prefabricated paving stones with specific tactile characteristics, mainly including two types: guiding tactile paving and warning tactile paving. Guiding tactile paving uses raised strips to guide visually impaired individuals, while warning tactile paving uses dotted or block-shaped raised areas to indicate the presence of intersections, steps, or potential hazards ahead. This type of tactile paving is simple in structure and has low construction costs, forming the foundation of urban accessible transportation systems for a long time. However, traditional tactile paving relies primarily on a fixed physical structure for information transmission, resulting in limited and static information that cannot dynamically respond to environmental factors such as road construction, temporary occupancy, or changes in traffic signals. When tactile paving is occupied, damaged, or when road conditions change, it is difficult to provide timely and effective warnings to visually impaired individuals, posing certain safety hazards.

[0004] Especially in actual urban environments, it is common for tactile paving to be occupied by motor vehicles, non-motor vehicles, shared equipment, temporary goods or other obstacles. The existing tactile paving facilities themselves lack the ability to perceive and respond to the occupancy status of the road surface. The relevant management mainly relies on manual inspections or post-event complaints, making it difficult to detect and deal with the problem of tactile paving being occupied in a timely manner. This seriously affects the continuity and usability of tactile paving and also weakens the safety guarantee effect of barrier-free facilities in actual use.

[0005] Furthermore, traditional tactile paving relies heavily on users' tactile perception, and its recognizability significantly decreases in rainy, snowy, or dusty conditions. In complex scenarios such as intersections, existing tactile paving often only provides vague cues, failing to clearly indicate specific directions or types of facilities ahead. To address these issues, existing technologies have attempted to introduce audible prompts, monitoring and recognition, or warning functions, but these primarily focus on single-function improvements, lacking system synergy, limiting applicability, and incurring high construction and maintenance costs, making it difficult to establish a continuous and stable barrier-free travel system.

[0006] On the other hand, with the development of technologies such as intelligent transportation, autonomous driving, and unmanned systems, the demand for high-precision, continuous positioning information in urban public spaces is constantly increasing. However, existing satellite navigation-based positioning methods are easily affected by obstruction and interference in complex urban environments, resulting in limited positioning accuracy and stability. These methods are susceptible to factors such as building obstruction and multipath effects, making it difficult to meet the precise positioning needs at the pedestrian walkway and facility levels. In contrast, tactile paving facilities are continuously laid along pedestrian paths, with fixed spatial locations and clear node sequences, naturally possessing the potential to serve as local high-precision positioning reference nodes. However, the overall intelligence level of existing tactile paving systems is low, and the potential capabilities of tactile paving nodes in location perception, status monitoring, and multi-node collaboration have not been fully explored. This makes it difficult to effectively collaborate with intelligent terminals, unmanned equipment, and urban management platforms. Therefore, there is an urgent need for a new type of intelligent tactile paving system that can break through the limitations of the traditional passive prompting mode of tactile paving, possessing location information acquisition, road surface status perception, and system collaboration capabilities, to adapt to the actual needs of barrier-free travel and refined management in complex urban environments. Summary of the Invention

[0007] One of the objectives of this invention is to provide an intelligent tactile paving system. By constructing an intelligent tactile paving system with the ability to acquire location information, perceive status, and interact with information, it enables the active perception and dynamic information prompts of the travel environment for visually impaired people. This breaks through the traditional passive prompting and static information usage mode of tactile paving, and while ensuring the basic tactile guidance function of tactile paving, it provides visually impaired people with safer, more accurate, and easier-to-understand travel guidance.

[0008] An intelligent tactile paving system provided in this embodiment of the invention includes: multiple intelligent tactile paving bricks, intelligent tactile paving terminals, and a system platform; The intelligent tactile paving terminal is communicatively connected to both the intelligent tactile paving brick and the system platform; the intelligent tactile paving brick includes: a brick body and an intelligent module installed inside the brick body. The intelligent module includes: a wireless communication and positioning unit, a road condition sensing unit, an information processing unit, and a power supply management unit. The wireless communication and positioning unit is used to realize the communication connection between the smart tactile paving bricks and the smart tactile paving terminal, and to obtain the location information and relative distance information between the smart tactile paving terminal and the corresponding smart tactile paving brick based on the characteristics of wireless signals. The road surface condition sensing unit is used to detect the road surface condition within a preset space above the smart tactile paving bricks and obtain road surface condition information. The information processing unit is used to analyze and process the collected location information, distance information, and road surface condition information, and generate corresponding prompts or guidance information according to preset guidance rules or tactile paving node attributes; the prompts or guidance information are sent to the intelligent tactile paving terminal through the wireless communication and positioning unit.

[0009] Preferably, the intelligent tactile paving terminal includes: a wireless communication module, an information processing module, and a prompt output module; wherein, the wireless communication module is used to establish a wireless communication connection with the intelligent tactile paving bricks and receive prompt or guidance information sent by them; the information processing module is used to parse the received information and generate corresponding travel guidance instructions based on the user's travel status; the prompt output module is used to output prompt or guidance information to visually impaired people through voice prompts, vibration prompts, or other perceptible means.

[0010] Preferably, the road surface condition sensing unit also determines whether there are obstructions or occupants based on the road surface condition information; when a continuous obstruction is detected above the tactile paving and the duration exceeds a preset threshold, the information processing unit generates the corresponding tactile paving occupancy status information and uploads it to the system platform through the wireless communication and positioning unit.

[0011] Preferably, the wireless communication and positioning unit can adopt a multi-antenna structure.

[0012] Preferably, the road surface condition sensing unit includes a millimeter-wave radar component, which is embedded in the middle of the upper surface of the brick.

[0013] Preferably, the brick body has a cavity structure inside for installing the smart module. The cavity structure is sealed by a back cover or a sealing structure. Both the cavity structure and the back cover are embedded with metal sheets.

[0014] Preferably, the information processing unit also performs the following operations: If no broadcast signal is received from the blind path terminal within a continuous monitoring period, it will enter a sleep / wake-up state according to the preset first cycle. When a broadcast signal from the tactile paving terminal is received during a continuous monitoring period, the system enters a sleep / wake-up state according to a preset second cycle and counts and judges the received signals. When the count reaches the preset first threshold, it is determined that the smart tactile paving terminal is moving forward along the tactile paving path, and based on this, it is predicted that the smart tactile paving terminal will soon enter the service area of ​​the next smart tactile paving brick. Send a preheating wake-up command to the next smart tactile paving brick to notify it to enter high-frequency working state in advance. In this case, the duration of a single cycle in the first cycle is greater than or equal to the duration of a single cycle in the second cycle.

[0015] Preferably, the information processing unit also performs the following operations: When a broadcast signal from the tactile paving terminal is received during a continuous monitoring period, the direction of movement of the intelligent tactile paving terminal is determined by the road surface condition information sensed by the road surface condition sensing unit. Based on the direction of movement, determine the next smart tactile paving brick.

[0016] Preferably, the information processing unit also performs the following operations: When the count exceeds the preset second threshold and the road condition information sensed by the road condition sensing unit indicates that the intelligent tactile paving terminal is stationary, a rescue request prompt instruction is sent to the intelligent tactile paving terminal and / or a rescue request is sent to the system platform.

[0017] Preferably, the information processing unit also performs the following operations: When the count exceeds the preset second threshold and the road condition information sensed by the road condition sensing unit indicates that the intelligent tactile paving terminal is stationary, communication is established with the previous and next intelligent tactile paving terminals to determine whether there are other intelligent tactile paving terminals; if there are, the intelligent tactile paving terminal is marked and tracked; if there are no other, a rescue request prompt instruction is sent to the intelligent tactile paving terminal and / or a rescue request is sent to the system platform.

[0018] The present invention has the following beneficial effects: I. By integrating wireless communication and positioning functions into the tactile paving bricks, wireless information interaction between the smart tactile paving bricks and the smart tactile paving terminal is realized. This allows for the acquisition of location information or relative distance information between the smart tactile paving terminal and the tactile paving bricks, transforming the traditional passive guidance method relying on tactile perception into an active guidance method based on location information. This improves the accuracy and reliability of guiding visually impaired individuals. By continuously deploying multiple smart tactile paving bricks along the travel path of visually impaired individuals, a tactile paving node network with a clear spatial sequence relationship is constructed. This enables segmented guidance and continuous prompts during the journey, enhancing the continuity of the tactile paving system in continuous passage, intersections, and other complex scenarios, and reducing the risk of misjudgment due to information interruption or ambiguous prompts.

[0019] Second, the system adopts a low-power communication mechanism that is triggered on demand, so that the smart tactile paving bricks are in a dormant state when there is no user interaction. They only enter the communication and ranging working state when the smart tactile paving terminal is close or there is a valid interaction need. This effectively reduces the overall energy consumption of the system, extends the continuous working time of the equipment, and improves the stability and maintainability of the system in the long-term operation process, making it suitable for large-scale laying and long-term application.

[0020] Third, since the intelligent tactile paving bricks are continuously laid along the urban sidewalks, have fixed spatial positions, and have a clear sequence relationship, this invention can not only provide barrier-free travel guidance for visually impaired people, but also serve as a high-precision positioning reference node in a local area. It can provide centimeter-level position reference information for unmanned equipment or intelligent terminals equipped with corresponding communication and ranging modules, which is conducive to effectively supplementing the existing satellite navigation and positioning methods in complex urban environments, improving the accuracy and reliability of position acquisition in a local area, and expanding the application scenarios and comprehensive value of the tactile paving system.

[0021] Fourth, without changing the basic laying method and usage habits of tactile paving, the information-based, intelligent and systematic upgrade of tactile paving facilities has been achieved. This not only helps to improve the independent travel ability and travel safety of visually impaired people in urban public spaces, but also provides new infrastructure support for smart transportation and refined urban management. It has good practical value and promotion significance.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0023] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of an intelligent tactile paving system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the intelligent tactile paving bricks in an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the positioning of the intelligent tactile paving bricks to the intelligent terminal in an embodiment of the present invention; Figure 4 This is a flowchart illustrating the low-power consumption of intelligent tactile paving bricks in an embodiment of the present invention. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] Example 1: This embodiment of the invention provides an intelligent tactile paving system for the blind, such as... Figure 1As shown, the system includes: multiple intelligent tactile paving bricks, intelligent tactile paving terminals, and a system platform. Multiple intelligent tactile paving bricks are continuously laid at predetermined intervals along urban roads, pedestrian walkways, public entrances, and other areas, forming a spatially ordered tactile paving path to provide continuous guidance and node positioning support for visually impaired individuals. The intelligent tactile paving terminals are carried by visually impaired individuals and can wirelessly communicate with the intelligent tactile paving bricks. They receive location and guidance information provided by the bricks and output corresponding path guidance information to the visually impaired individuals through voice prompts, vibration prompts, or a combination thereof. The system management platform is used for unified management of the equipment information of multiple intelligent tactile paving bricks and can interface with urban transportation systems or municipal management systems to obtain basic environmental information related to tactile paving access, assisting in the generation or dynamic adjustment of tactile paving guidance prompts. Basic environmental information includes, but is not limited to, road construction status, temporary obstacle information, traffic signal status, and municipal facility parameters and surrounding public service facility information related to tactile paving access, thereby improving the applicability and overall coordination capability of the tactile paving system in complex urban environments. The intelligent tactile paving terminal is communicatively connected to both the intelligent tactile paving brick and the system platform. The intelligent tactile paving brick includes a brick body and an intelligent module housed within it. The brick body contains a cavity structure for installing the intelligent module, which is sealed by a back cover or a sealing structure. Both the cavity structure and the back cover are embedded with metal sheets to suppress interference signals from the foundation direction and enhance effective radiation into the space above the tactile paving brick, thereby improving the overall structural stability and environmental adaptability. Figure 2As shown, the intelligent tactile paving brick includes a brick body and an intelligent module housed inside the brick body. The upper surface of the brick body has raised structures to create tactile features for the tactile paving. In addition to the conventional tactile paving protrusions, matrix antenna information points for wireless communication and positioning are located at the four corners of the brick body, integrating communication and positioning functions without affecting the tactile guidance function of the tactile paving. A millimeter-wave radar is located in the center of the brick body to detect obstacles on the tactile paving. The interior of the brick body contains a cavity for installing the intelligent module. The cavity is sealed by a back cover or sealing structure to fix and protect the intelligent module. Metal plates are embedded in the cavity and back cover to suppress interference signals from the ground direction. The intelligent module includes a wireless communication and positioning unit, a road surface condition sensing unit, an information processing unit, and a power supply management unit. The wireless communication and positioning unit enables wireless communication with the intelligent tactile paving terminal and acquires distance information related to positioning. The power supply management unit provides the necessary power for each functional unit and manages the power supply status. The road surface condition sensing unit detects targets on the tactile paving surface and within a certain height range above it. By analyzing the distance, angle, or presence of echo signals, it is determined whether there are obstructions or occupants above the tactile paving. The information processing unit is connected to the wireless communication and positioning unit and the road surface condition sensing unit to comprehensively process the collected positioning and road surface condition information. When a continuous obstruction is detected above the tactile paving for a duration exceeding a preset threshold, the information processing unit generates tactile paving occupancy information and uploads it to the system management platform via wireless communication to achieve remote monitoring and management of tactile paving occupancy.

[0027] The intelligent module includes: a wireless communication and positioning unit, a road surface condition sensing unit, an information processing unit, and a power supply management unit. The wireless communication and positioning unit establishes communication between the intelligent tactile paving bricks and the intelligent tactile paving terminal, and acquires the location and relative distance information between the intelligent tactile paving terminal and the corresponding intelligent tactile paving brick based on wireless signal characteristics. The wireless communication and positioning unit can employ a multi-antenna structure; through multi-antenna collaborative wireless channel measurement, the stability and accuracy of location information acquisition are improved. The road surface condition sensing unit detects the road surface condition within a preset spatial range above the intelligent tactile paving bricks, obtaining road surface condition information. The information processing unit analyzes and processes the collected location, distance, and road surface condition information, and generates corresponding prompts or guidance information based on preset guidance rules or tactile paving node attributes. The prompts or guidance information are then sent to the intelligent tactile paving terminal via the wireless communication and positioning unit. Furthermore, the road surface condition sensing unit determines whether there are obstructions or occupants based on the road surface condition information. When a continuous obstruction is detected above the tactile paving for a duration exceeding a preset threshold, the information processing unit generates corresponding tactile paving occupancy information and uploads it to the system platform via the wireless communication and positioning unit. For example, the road surface condition sensing unit includes a millimeter-wave radar component, which is embedded in the middle of the upper surface of the brick.

[0028] The power supply management unit is used to provide the electrical energy required for the operation of the wireless communication and positioning unit, the road condition sensing unit and the information processing unit, and to manage the power supply status. Its power source is the built-in power supply component set inside the brick body.

[0029] Multiple intelligent tactile paving stones are continuously deployed along the travel path of visually impaired individuals according to predetermined rules. Each intelligent tactile paving stone interacts with an intelligent tactile paving terminal via wireless communication, thereby providing segmented guidance and continuous prompts for visually impaired individuals during their journey. Simultaneously, the intelligent tactile paving stones can upload their operational status, pavement occupancy status, or abnormal information to the system platform for unified management and maintenance of the tactile paving system. The intelligent tactile paving terminal includes a wireless communication module, an information processing module, and a prompt output module. The wireless communication module is used to establish a wireless communication connection with the intelligent tactile paving bricks and receive prompt or guidance information sent by them. The information processing module is used to parse the received information and generate corresponding travel guidance instructions based on the user's travel status. The prompt output module is used to output prompt or guidance information to visually impaired people through voice prompts, vibration prompts, or other perceptible means.

[0030] like Figure 3As shown, when the intelligent tactile paving terminal enters the wireless communication coverage area of ​​the intelligent tactile paving bricks, it establishes wireless communication connections with four matrix antenna information points in the forward direction and four matrix antenna information points in the backward direction of the intelligent tactile paving bricks, respectively, and acquires the distance information between the intelligent tactile paving terminal and the four forward matrix antenna information points, as well as the distance information between the intelligent tactile paving terminal and the four backward matrix antenna information points. The wireless communication and positioning unit sends the acquired forward and backward distance information to the information processing unit. The information processing unit analyzes and processes the distance information corresponding to the four forward matrix antenna information points to determine a forward candidate location point in space; simultaneously, it analyzes and processes the distance information corresponding to the four backward matrix antenna information points to determine a backward candidate location point in space. The information processing unit further determines the unique location point of the intelligent tactile paving terminal in space based on the combination relationship between the forward and backward candidate location points, thereby obtaining the accurate location information of the visually impaired person and generating travel guidance information corresponding to the current tactile paving node.

[0031] The intelligent tactile paving bricks need to interact with the intelligent tactile paving terminal via wireless communication for channel detection and ranging. Frequent channel detection and precise ranging significantly increase the working time of the wireless communication and positioning unit, thereby accelerating power consumption in the power management unit. To reduce overall system energy consumption while ensuring timely positioning response, this invention further adopts a relay wake-up strategy based on travel direction prediction. In this strategy, the information processing unit also performs the following operations: If no broadcast signal is received from the blind path terminal within a continuous monitoring period, it will enter a sleep / wake-up state according to the preset first cycle. When a broadcast signal from the tactile paving terminal is received during a continuous monitoring period, the system enters a sleep / wake-up state according to a preset second cycle and counts and judges the received signals. When the count reaches the preset first threshold, it is determined that the smart tactile paving terminal is moving forward along the tactile paving path, and based on this, it is predicted that the smart tactile paving terminal will soon enter the service area of ​​the next smart tactile paving brick. Send a preheating wake-up command to the next smart tactile paving brick to notify it to enter high-frequency working state in advance. In this case, the duration of a single cycle in the first cycle is greater than or equal to the duration of a single cycle in the second cycle.

[0032] Take a specific application as an example, such as Figure 4As shown, during system operation, the smart tactile paving bricks numbered sequentially along the direction of travel for visually impaired individuals are designated as the Nth smart tactile paving brick, the (N+1)th smart tactile paving brick, etc., with short, medium, and long cycles set according to the actual spacing between the bricks. When the smart tactile paving terminal establishes a communication connection with the Nth smart tactile paving brick, the Nth smart tactile paving brick enters the working state and performs signal monitoring and communication interaction according to a preset monitoring cycle. Specifically, the Nth smart tactile paving brick first determines whether it has received a broadcast signal from the smart tactile paving terminal. If no broadcast signal is received within a continuous monitoring cycle, the Nth smart tactile paving brick enters a sleep / wake-up state with a longer cycle to reduce energy consumption in idle state; when a broadcast signal is received, the Nth smart tactile paving brick enters a sleep / wake-up state with a shorter cycle and counts and judges the received signal. When the Nth smart tactile paving brick receives a preset threshold number of broadcast signals from the smart tactile paving terminal during continuous monitoring, the information processing unit determines that the smart tactile paving terminal is moving forward along the tactile paving path and predicts that it will soon enter the service area of ​​the N+1th smart tactile paving brick. In this case, the Nth smart tactile paving brick sends a preheating wake-up command to the N+1th smart tactile paving brick via wireless communication, notifying it to enter a high-frequency operating state in advance. Upon receiving the preheating wake-up command, the N+1th smart tactile paving brick switches from a long-cycle sleep monitoring state to a short-cycle sleep wake-up state, activating its wireless communication and positioning units in advance so that it can quickly establish a connection and perform ranging and positioning interactions when the smart tactile paving terminal enters its communication coverage area. When the (N+1)th smart tactile paving brick does not receive a broadcast signal from the smart tactile paving terminal within a preset time, it returns to the long-cycle sleep listening state. When it successfully receives the terminal broadcast and completes the positioning interaction, the (N+1)th smart tactile paving brick continues to perform a relay wake-up operation to the subsequent (N+2)th smart tactile paving brick according to the same judgment logic, thus forming a relay wake-up mechanism that is passed sequentially along the direction of travel on the tactile paving path.

[0033] This invention introduces intelligent tactile paving nodes with precise ranging and location calculation capabilities into the tactile paving system. This enables the tactile paving facility to form a continuous, stable, and high-precision positioning reference network within a local area. This not only improves the positioning accuracy and path recognition ability of visually impaired individuals during movement but also allows for future collaboration with intelligent devices equipped with corresponding communication and ranging modules, effectively supplementing existing satellite navigation-based positioning methods. This enhances the accuracy and stability of location acquisition in complex urban environments. Through the perception of the working status of tactile paving nodes and the surrounding road surface conditions, as well as a collaborative control mechanism between adjacent tactile paving nodes, this invention proactively detects and reports tactile paving occupancy. Furthermore, through collaborative wake-up and service preheating between nodes, it improves the system's responsiveness during continuous user movement, enhancing the continuous service capability and overall reliability of the tactile paving system while maintaining low power consumption. The present invention further aims to enable the collaborative work between tactile paving facilities and smart terminals, urban management platforms and related barrier-free facilities, improve the information expression ability, operational stability and extended application ability of the tactile paving system in complex scenarios, thereby comprehensively improving the independent travel ability and travel safety of visually impaired people in urban public spaces, and promoting the development of barrier-free infrastructure towards intelligence, systematization and multi-scenario collaboration.

[0034] Example 2: This embodiment of the invention provides an intelligent tactile paving system, including: multiple intelligent tactile paving bricks, intelligent tactile paving terminals, and a system platform; multiple intelligent tactile paving bricks are laid along the travel paths of visually impaired people; the intelligent tactile paving bricks, as the basic units of the tactile paving system, are set in pedestrian walkways, intersections, and other areas accessible to visually impaired people; The intelligent tactile paving terminal is communicatively connected to both the intelligent tactile paving brick and the system platform; the intelligent tactile paving brick includes: a brick body and an intelligent module installed inside the brick body. The intelligent module includes: a wireless communication and positioning unit, a road condition sensing unit, an information processing unit, and a power supply management unit. The wireless communication and positioning unit is used to realize the communication connection between the smart tactile paving bricks and the smart tactile paving terminal, and to obtain the location information and relative distance information between the smart tactile paving terminal and the corresponding smart tactile paving brick based on the characteristics of wireless signals. The road surface condition sensing unit is used to detect the road surface condition within a preset space above the smart tactile paving bricks and obtain road surface condition information. The information processing unit is used to analyze and process the collected location information, distance information, and road surface condition information, and generate corresponding prompts or guidance information according to preset guidance rules or tactile paving node attributes; the prompts or guidance information are sent to the intelligent tactile paving terminal through the wireless communication and positioning unit.

[0035] The information processing unit also performs the following operations: If no broadcast signal is received from the blind path terminal within a continuous monitoring period, it will enter a sleep / wake-up state according to the preset first cycle. When a broadcast signal from the tactile paving terminal is received during a continuous monitoring period, the system enters a sleep / wake-up state according to a preset second cycle and counts and judges the received signals. When the count reaches the preset first threshold, it is determined that the smart tactile paving terminal is moving forward along the tactile paving path, and based on this, it is predicted that the smart tactile paving terminal will soon enter the service area of ​​the next smart tactile paving brick. Send a preheating wake-up command to the next smart tactile paving brick to notify it to enter high-frequency working state in advance. In this case, the duration of a single cycle in the first cycle is greater than or equal to the duration of a single cycle in the second cycle.

[0036] In addition, to improve the accuracy of wake-up target determination, the information processing unit also performs the following operations: When a broadcast signal from the tactile paving terminal is received during a continuous monitoring period, the direction of movement of the intelligent tactile paving terminal is determined by the road surface condition information sensed by the road surface condition sensing unit. Based on the direction of movement, determine the next smart tactile paving brick.

[0037] In order to monitor and analyze the safety of visually impaired individuals, the information processing unit also performs the following operations: When the count exceeds the preset second threshold and the road condition information sensed by the road condition sensing unit indicates that the intelligent tactile paving terminal is stationary, a rescue request prompt instruction is sent to the intelligent tactile paving terminal and / or a rescue request is sent to the system platform.

[0038] To avoid situations where two visually impaired individuals meet and remain in place to communicate, which might be misinterpreted as a rescue attempt, the information processing unit also performs the following operations: When the count exceeds a preset second threshold and the road condition information sensed by the road condition sensing unit indicates that the smart tactile paving terminal is stationary, communication is established with the preceding and following smart tactile paving terminals to determine if other smart tactile paving terminals exist. If so, the smart tactile paving terminal is marked and tracked; if not, a rescue request prompt is sent to the smart tactile paving terminal and / or a rescue request is sent to the system platform. The first threshold is less than or equal to the second threshold. Generally, visually impaired individuals have more developed hearing than sighted individuals and may be able to determine from a distance that another visually impaired person is ahead by the sound of their guide cane tapping, thus engaging in conversation. Therefore, it is necessary to establish a communication team between the preceding and following smart tactile paving tiles to assess the situation and further reduce the probability of misjudgment.

[0039] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An intelligent tactile paving system for the visually impaired, characterized in that, include: Multiple intelligent tactile paving bricks, intelligent tactile paving terminals, and system platforms; The intelligent tactile paving terminal is communicatively connected to both the intelligent tactile paving brick and the system platform; the intelligent tactile paving brick includes: a brick body and an intelligent module installed inside the brick body. The intelligent module includes: a wireless communication and positioning unit, a road condition sensing unit, an information processing unit, and a power supply management unit. The wireless communication and positioning unit is used to realize the communication connection between the smart tactile paving bricks and the smart tactile paving terminal, and to obtain the location information and relative distance information between the smart tactile paving terminal and the corresponding smart tactile paving brick based on the characteristics of wireless signals. The road surface condition sensing unit is used to detect the road surface condition within a preset space above the smart tactile paving bricks and obtain road surface condition information. The information processing unit is used to analyze and process the collected location information, distance information, and road surface condition information, and generate corresponding prompts or guidance information according to preset guidance rules or tactile paving node attributes; the prompts or guidance information are sent to the intelligent tactile paving terminal through the wireless communication and positioning unit.

2. The intelligent tactile paving system as described in claim 1, characterized in that, The intelligent tactile paving terminal includes: a wireless communication module, an information processing module, and a prompt output module. The wireless communication module is used to establish a wireless communication connection with the intelligent tactile paving bricks and receive prompt or guidance information sent by them. The information processing module is used to parse the received information and generate corresponding travel guidance instructions based on the user's travel status. The prompt output module is used to output prompt or guidance information to visually impaired people through voice prompts, vibration prompts, or other perceptible means.

3. The intelligent tactile paving system as described in claim 1, characterized in that, The road surface condition perception unit also determines whether there are obstructions or occupants based on the road surface condition information. When a continuous obstruction is detected above the tactile paving and the duration exceeds a preset threshold, the information processing unit generates the corresponding tactile paving occupancy status information and uploads it to the system platform through the wireless communication and positioning unit.

4. The intelligent tactile paving system as described in claim 1, characterized in that, The wireless communication and positioning unit can adopt a multi-antenna structure.

5. The intelligent tactile paving system as described in claim 1, characterized in that, The road surface condition sensing unit includes a millimeter-wave radar component, which is embedded in the middle of the upper surface of the brick.

6. The intelligent tactile paving system as described in claim 1, characterized in that, The brick body has an internal cavity structure for installing smart modules. The cavity structure is sealed by a back cover or a sealing structure. Both the cavity structure and the back cover are embedded with metal sheets.

7. The intelligent tactile paving system as described in claim 1, characterized in that, The information processing unit also performs the following operations: If no broadcast signal is received from the blind path terminal within a continuous monitoring period, it will enter a sleep / wake-up state according to the preset first cycle. When a broadcast signal from the tactile paving terminal is received during a continuous monitoring period, the system enters a sleep / wake-up state according to a preset second cycle and counts and judges the received signals. When the count reaches the preset first threshold, it is determined that the smart tactile paving terminal is moving forward along the tactile paving path, and based on this, it is predicted that the smart tactile paving terminal will soon enter the service area of ​​the next smart tactile paving brick. Send a preheating wake-up command to the next smart tactile paving brick to notify it to enter high-frequency working state in advance. In this case, the duration of a single cycle in the first cycle is greater than or equal to the duration of a single cycle in the second cycle.

8. The intelligent tactile paving system as described in claim 7, characterized in that, The information processing unit also performs the following operations: When a broadcast signal from the tactile paving terminal is received during a continuous monitoring period, the direction of movement of the intelligent tactile paving terminal is determined by the road surface condition information sensed by the road surface condition sensing unit. Based on the direction of movement, determine the next smart tactile paving brick.

9. The intelligent tactile paving system as described in claim 7, characterized in that, The information processing unit also performs the following operations: When the count exceeds the preset second threshold and the road condition information sensed by the road condition sensing unit indicates that the intelligent tactile paving terminal is stationary, a rescue request prompt instruction is sent to the intelligent tactile paving terminal and / or a rescue request is sent to the system platform.

10. The intelligent tactile paving system as described in claim 7, characterized in that, The information processing unit also performs the following operations: When the count exceeds the preset second threshold and the road condition information sensed by the road condition sensing unit indicates that the intelligent tactile paving terminal is stationary, communication is established with the previous and next intelligent tactile paving terminals to determine whether there are other intelligent tactile paving terminals; if there are, the intelligent tactile paving terminal is marked and tracked; if there are no other, a rescue request prompt instruction is sent to the intelligent tactile paving terminal and / or a rescue request is sent to the system platform.

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