A forehead tactile dot array blind guiding information processing method and system
Patent Information
- Application Number
- CN202610971524.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-01
- Publication Date
- 2026-08-18
AI Technical Summary
传统手杖主要解决近距离地面障碍探测问题，难以同时承担方向引导与复杂场景预判；语音播报类方案虽然能够提供更多信息，但会占用视障人士感知环境声的重要听觉资源，在嘈杂环境中易漏听，在安静环境中又可能干扰对周边风险的判断
本发明采用额头中央点阵与周向方向双区域触觉结构，不占用听觉通道，保留用户对环境声源的感知能力；通过方向与路况分层编码，在有限触点数量下实现方向引导与环境语义的同步表达，信息承载能力强；额头区域皮肤触觉敏感且无遮挡，输出稳定、可持续，适合动态行走场景；通过调整触觉强度、频率、持续时间和重复节奏，可扩展表达距离、紧急程度或置信度，适应复杂环境；点阵图样具有可学习性与可标准化，便于形成统一的导盲触觉语义字典，降低用户学习成本，提升导航的安全性与连续性。
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Figure CN122582003A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of barrier-free navigation and tactile human-computer interaction technology, and particularly relates to a method and system for processing forehead tactile dot matrix guide information. Background Technology
[0002] Currently, assistive technologies for visually impaired individuals mainly include guide canes, guide dogs, and voice-guided electronic aids. Traditional canes primarily address short-range obstacle detection, but struggle to simultaneously provide directional guidance and anticipate complex scenarios. While voice-guided solutions offer more information, they consume crucial auditory resources for visually impaired individuals, making them prone to being missed in noisy environments and potentially interfering with risk assessment in quiet settings. Existing tactile solutions largely focus on the hands, wrists, or torso, and their encoding methods are mostly limited to low-dimensional expressions such as single-point directional cues and frequency change indicators, failing to provide a unified expression of multiple semantic categories, including direction, road conditions, obstacle types, and action commands. Therefore, there is an urgent need for a fundamental encoding method built upon the high-recognition tactile region of the forehead to construct a learnable and scalable tactile language for guides. Summary of the Invention
[0003] To address the aforementioned technical problems, this invention provides a method for processing forehead tactile dot matrix guide information, comprising: Get navigation tips; Based on the navigation prompts, the direction parameters and road condition / action parameters are obtained by parsing. Based on the preset tactile coding rules, a directional tactile code is generated according to the direction parameters, and a dot matrix tactile code is generated according to the road condition / action parameters; According to the preset encoding logic, the directional tactile code and the dot matrix tactile code are combined into a tactile driving sequence; According to the tactile driving sequence, the forehead tactile feedback module is driven to output directional prompts and dot matrix prompts.
[0004] Optionally, the step of parsing to obtain the direction parameters and road condition / action parameters includes: The direction parameters are obtained based on the direction-related prompts in the navigation prompts, and the road condition / action parameters are obtained based on the road condition / action-related prompts in the navigation prompts.
[0005] Optionally, the directional haptic code is represented by activating at least one directional haptic unit among a plurality of directional haptic units arranged circumferentially on the forehead that corresponds to the directional parameter.
[0006] Optionally, the dot matrix tactile code is represented by a pattern formed by the combination of activated and inactive tactile points in a two-dimensional dot matrix array in the center of the forehead, and the pattern corresponds to the road condition / motion parameters.
[0007] Optionally, the preset encoding logic adopts a direction and road condition layered encoding logic, including outputting the direction tactile code and the dot matrix tactile code synchronously in time or outputting them sequentially in a fixed time order.
[0008] Optionally, the haptic drive sequence includes the activation position, activation duration, activation intensity, and activation frequency of the haptic actuator.
[0009] The present invention also provides a forehead tactile dot matrix guide information processing system, comprising: The environmental information acquisition module is used to receive navigation prompts. The semantic parsing module is used to parse the navigation prompt information into direction parameters and road condition / action parameters; The encoding mapping module is used to generate directional tactile codes according to the direction parameters based on the preset tactile encoding rules, and to generate dot matrix tactile codes according to the road condition / action parameters. The drive control module is used to combine the directional haptic code and the dot matrix haptic code into a haptic drive sequence; A forehead-oriented haptic component is used to output directional cues according to the haptic drive sequence; A forehead dot matrix haptic component is used to output dot matrix cues according to the haptic drive sequence.
[0010] Optionally, the forehead-oriented tactile component is a ring-shaped tactile unit array or a circumferentially distributed tactile unit array.
[0011] Optionally, the tactile actuator of the forehead dot matrix tactile component includes a controllable protrusion structure, a micro-vibration actuator, a pneumatic / hydraulic micro-pressure actuator, a shape memory alloy drive actuator, and an electroactive polymer drive actuator.
[0012] Compared with the prior art, the present invention has the following advantages and technical effects: This invention employs a dual-region tactile structure with a central forehead dot matrix and circumferential directions, which does not occupy the auditory channel and preserves the user's ability to perceive environmental sound sources. Through hierarchical encoding of direction and road conditions, it achieves synchronous expression of directional guidance and environmental semantics with a limited number of touch points, resulting in strong information carrying capacity. The forehead area has sensitive and unobstructed tactile sensation, providing stable and continuous output, suitable for dynamic walking scenarios. By adjusting the tactile intensity, frequency, duration, and repetition rhythm, the expression of distance, urgency, or confidence can be expanded to adapt to complex environments. The dot matrix pattern is learnable and standardizable, facilitating the formation of a unified tactile semantic dictionary for the visually impaired, reducing user learning costs, and improving the safety and continuity of navigation. Attached Figure Description
[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the forehead tactile dot matrix guide information processing flow according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the navigation information and road condition dot matrix tactile encoding and layout according to an embodiment of the present invention. Detailed Implementation
[0014] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0015] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.
[0016] Example 1 like Figure 1 As shown, this embodiment provides a method for processing forehead tactile dot matrix guide information, including: Get navigation tips; Based on the navigation prompts, the direction parameters and road condition / action parameters are obtained by parsing. Based on the preset tactile coding rules, a directional tactile code is generated according to the direction parameters, and a dot matrix tactile code is generated according to the road condition / action parameters; According to the preset encoding logic, the directional tactile code and the dot matrix tactile code are combined into a tactile driving sequence; According to the tactile driving sequence, the forehead tactile feedback module is driven to output directional prompts and dot matrix prompts.
[0017] Furthermore, the steps for parsing and obtaining direction parameters and road condition / action parameters include: The direction parameters are obtained based on the direction-related prompts in the navigation prompts, and the road condition / action parameters are obtained based on the road condition / action-related prompts in the navigation prompts.
[0018] Specifically, the navigation prompts include obstacle distance information. This distance information is encoded through changes in the frequency, pulse interval, or intensity of tactile output. The closer the distance, the higher the frequency, the shorter the interval, or the greater the intensity.
[0019] Furthermore, the directional haptic code is represented by activating at least one directional haptic unit among a plurality of directional haptic units arranged circumferentially on the forehead that corresponds to the directional parameter.
[0020] The directional tactile unit is divided into at least four directional areas along the circumference: front, back, left, and right, or a ring-shaped area can be further constructed; the directional tactile code uses single-point indication or ball-bearing ring-shaped area movement indication to express direction.
[0021] Furthermore, the dot matrix haptic code is represented by a pattern formed by the combination of activated and inactive haptic points in a two-dimensional dot matrix array in the center of the forehead, and the pattern corresponds to the road condition / motion parameters.
[0022] Furthermore, the preset encoding logic adopts a direction and road condition layered encoding logic, including outputting the direction tactile code and the dot matrix tactile code synchronously in time or outputting them sequentially in a fixed time order.
[0023] Furthermore, the haptic drive sequence includes the activation location, activation duration, activation intensity, and activation frequency of the haptic actuator.
[0024] Furthermore, the tactile dot matrix component is a two-dimensional dot matrix array. The dot matrix tactile code forms a pattern by combining the activation / deactivation of multiple tactile points within the dot matrix to represent road conditions / action parameters.
[0025] The dot matrix tactile area is located in the center of the forehead and adopts a two-dimensional dot matrix array structure; the two-dimensional dot matrix array is 2 2+1 array, 3×3 array, or other array structures that can represent multiple patterns.
[0026] The road conditions / motion parameters include at least one or more of the following: going up stairs, going down stairs, flat road, going up steps, going down steps, uphill, downhill, head height obstacle, chest height obstacle, road surface depression, intersection, left turn, right turn, and stop; and each corresponds to a different dot matrix tactile code pattern.
[0027] Dot matrix haptic codes represent road conditions / action parameters through the activation, inactivation, and combination patterns of multiple haptic points within the dot matrix, forming learnable and reusable haptic semantic units.
[0028] Furthermore, a tactile calibration step is performed before outputting the tactile drive sequence. The tactile calibration step includes acquiring the user's forehead sensitivity parameters and adaptively adjusting the intensity threshold and minimum discernible pulse width of the tactile actuator based on the sensitivity parameters.
[0029] In this embodiment, the directional tactile code and the dot matrix tactile code adopt a redundancy check strategy, which includes at least one of repeated output, mirror output or check pulse output, in order to reduce the misjudgment rate during walking.
[0030] This embodiment also provides a forehead tactile dot matrix guide information processing system for the visually impaired, including: The environmental information acquisition module is used to receive navigation prompts. The semantic parsing module is used to parse the navigation prompt information into direction parameters and road condition / action parameters; The encoding mapping module is used to generate directional tactile codes according to the direction parameters based on the preset tactile encoding rules, and to generate dot matrix tactile codes according to the road condition / action parameters. The drive control module is used to combine the directional haptic code and the dot matrix haptic code into a haptic drive sequence; A forehead-oriented haptic component is used to output directional cues according to the haptic drive sequence; A forehead dot matrix haptic component is used to output dot matrix cues according to the haptic drive sequence.
[0031] Furthermore, the forehead-oriented tactile component is a ring-shaped tactile unit array or a circumferentially distributed tactile unit array.
[0032] Furthermore, the tactile actuators of the forehead dot matrix haptic component include controllable protrusion structures, micro-vibration actuators, pneumatic / hydraulic micro-pressure actuators, shape memory alloy driven actuators, and electroactive polymer driven actuators.
[0033] The following explanation, in conjunction with the accompanying drawings, further illustrates the following: Figure 1 This is a schematic diagram of the guidance process for forehead tactile dot matrix encoding information. When only directional cues are present, directional tactile codes can be output separately; when road condition / action cues are present, dot matrix tactile codes can be output separately; when both are present simultaneously, a synchronous overlay method or a fixed timing method of "direction first, road condition second" can be used. For emergency cues, the activation frequency can be increased, the number of repetitions increased, or the tactile intensity enhanced; for changes in distance, the pulse interval can be shortened or the rhythm accelerated.
[0034] The system implementing the method described in the claims includes an environmental information acquisition module, a semantic parsing module, an encoding mapping module, a drive control module, a forehead-oriented tactile component, and a forehead dot matrix tactile component. The specific communication interface, power supply method, actuator materials, and structural implementation of this system can be replaced according to the actual product, but this does not affect the core protection scope of this invention regarding tactile language and encoding methods.
[0035] Figure 2 A schematic diagram illustrating the tactile encoding and layout of navigation information and road conditions. The encoding method is as follows: (1) Information Acquisition and Parsing: The external navigation terminal outputs navigation prompts, which include at least directional prompts (such as going straight, turning left, turning right, stopping, etc.) and road condition / action prompts (such as going down stairs, going uphill, head obstacles, etc.). The system parses the prompts to obtain directional parameters and road condition / action parameters.
[0036] (2) Direction encoding: Mapping direction parameters to directional tactile codes. For example, the rotation of a ball can guide the direction by pressing on the skin.
[0037] (3) Dot matrix encoding: Mapping road condition / motion parameters to dot matrix tactile codes. A dot matrix tactile code is represented by a specific pattern formed by activating several tactile points in a two-dimensional dot matrix; the pattern can be designed according to categories, for example: Types of elevation changes: going up stairs, going down stairs, going up steps, going down steps; Slope changes: uphill, downhill; Disability categories: Head height impairment, chest height impairment; Special road surfaces: potholes, narrow / curved roads (expandable); Interactive commands: intersection, turn left, turn right, stop.
[0038] (4) Sequence synthesis and output: The directional tactile code and the dot matrix tactile code are synthesized into a tactile driving sequence. The output can be synchronous (direction + dot matrix prompts at the same time) or fixed timing output (e.g., direction first, then road conditions, with a fixed interval of milliseconds).
[0039] (5) Emergency / Distance Extension: When there is emergency obstacle avoidance or distance information, the emergency level is expressed by increasing the frequency of the dot matrix output, enhancing the intensity, or increasing the number of repetitions; the degree of proximity of the obstacle is expressed by the change of frequency / interval with distance.
[0040] (6) Personalized calibration: When using the system for the first time or periodically, the system guides the user to select the "most comfortable and discernible" intensity and rhythm, and writes the parameters for subsequent adaptive output.
[0041] like Figure 2 As shown, the dot matrix tactile area can use 2 2+1 or 3×3 arrays. Different road conditions / action parameters are represented by different patterns. For example, height changes can be represented by longitudinal change patterns, slope changes by diagonal continuous patterns, obstacle categories by upper or middle contact point clustering patterns, and stop commands by overall high-alert patterns. The patterns should prioritize distinguishability, consistency, and low learning cost.
[0042] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A method for processing forehead tactile dot matrix guide information, characterized in that, include: Get navigation tips; Based on the navigation prompts, the direction parameters and road condition / action parameters are obtained by parsing. A directional tactile code is generated based on the directional parameters, and a dot matrix tactile code is generated based on the road condition / motion parameters; According to the preset encoding logic, the directional tactile code and the dot matrix tactile code are combined into a tactile driving sequence; According to the tactile driving sequence, the forehead tactile feedback module is driven to output directional prompts and dot matrix prompts.
2. The method according to claim 1, characterized in that, The steps for obtaining the direction parameters and road condition / action parameters through analysis include: The direction parameters are obtained based on the direction-related prompts in the navigation prompts, and the road condition / action parameters are obtained based on the road condition / action-related prompts in the navigation prompts.
3. The method according to claim 1, characterized in that, The directional tactile code is represented by activating at least one directional tactile unit among a plurality of directional tactile units arranged circumferentially on the forehead that corresponds to the directional parameter.
4. The method according to claim 1, characterized in that, The dot matrix tactile code is represented by a pattern formed by the combination of activated and inactive tactile points in a two-dimensional dot matrix array in the center of the forehead, and the pattern corresponds to the road condition / motion parameters.
5. The method according to claim 1, characterized in that, The preset encoding logic adopts a direction and road condition layered encoding logic, which includes outputting the direction tactile code and the dot matrix tactile code synchronously in time or outputting them sequentially in a fixed time order.
6. The method according to claim 1, characterized in that, The tactile actuation sequence includes the activation position, activation duration, activation intensity, and activation frequency of the tactile actuator.
7. A forehead tactile dot matrix guide information processing system for the visually impaired, characterized in that, include: The environmental information acquisition module is used to receive navigation prompts. The semantic parsing module is used to parse the navigation prompt information into direction parameters and road condition / action parameters; The encoding mapping module is used to generate directional tactile codes based on the direction parameters and to generate dot matrix tactile codes based on the road condition / motion parameters. The drive control module is used to combine the directional haptic code and the dot matrix haptic code into a haptic drive sequence; A forehead-oriented haptic component is used to output directional cues according to the haptic drive sequence; A forehead dot matrix haptic component is used to output dot matrix cues according to the haptic drive sequence.
8. The system according to claim 7, characterized in that, The forehead-oriented tactile component is a ring-shaped tactile unit array or a circumferentially distributed tactile unit array.
9. The system according to claim 7, characterized in that, The tactile actuators of the forehead dot matrix tactile component include a controllable protrusion structure, a micro-vibration actuator, a pneumatic / hydraulic micro-pressure actuator, a shape memory alloy drive actuator, and an electroactive polymer drive actuator.