Diamond Profiled Curb Ramp Tactile Guidance
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Solution Overview
Problem
Existing transition points between roadways and sidewalks or cycle paths are not adequately tactilely detectable for visually impaired individuals using a direction-seeking cane, as current profiling designs are either difficult to detect or not suitable for easy navigation.
Innovation Solution
The transition point features diamond-shaped profiling elements arranged in rows parallel to the roadway with gaps between consecutive rows, a multi-part curb design with central and lateral shaped body parts, and a warning panel with a groove profile and nub-like profiling zones, providing improved tactile detectability and guidance for visually impaired individuals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If traditional groove profiles or nub-like elevations are used for tactile detection, then the curb driveway provides some tactile feedback, but visually impaired individuals cannot easily and quickly detect the profiling using a white cane
Solution Approach 1:
The patent applies curvature by using diamond-shaped profiling elements with rounded edges instead of straight grooves or nubs. The curved diamond shape creates distinct tactile sensations when encountered by a white cane, making detection faster and easier while maintaining a compact form factor that doesn't increase detection time
Solution Approach 2:
The patent implements local quality by creating directional profiling zones with different tactile characteristics - grooved areas for directional guidance and nub-like areas for tactile detection. This localized variation in surface quality allows visually impaired individuals to quickly distinguish different zones and navigate effectively without increasing overall detection time
2Ease of operation
If the attention field width is reduced to match the curb width, then the tactile guidance is more focused, but the coverage area for guiding visually impaired individuals is reduced
Solution Approach 1:
The patent divides the attention field into multiple profiling zones including directional grooved zones and tactile nub zones. This segmentation allows the system to provide focused tactile guidance in specific areas while maintaining adequate overall coverage, as each zone serves a specific functional purpose in guiding visually impaired individuals safely to the curb
3Difficulty of detecting and measuring
If diamond-shaped profiling elements are arranged in rows with gaps, then tactile detectability is improved, but the complexity of the curb structure increases
Solution Approach 1:
The patent uses diamond-shaped profiling elements that replicate the tactile detection function of traditional curbs while improving detectability. The diamond pattern serves as a simplified copy of complex tactile patterns, providing adequate tactile feedback through repetition of the basic diamond shape in rows with gaps, thus improving detection without proportionally increasing structural complexity
Data Source
AI summary
Paved pedestrian walkway section as an accessible transition point between a roadway (5) and a pedestrian or cycle path (6) with a curb ramp (1) integrated into a kerb (formed body 2, 3, 4) sloping from the level of the pedestrian or cycle path (6) to the level of the roadway (5) for wheelchair and rollator users and a profiled attention field (7) for visually impaired persons with a tactile, multi-part formed body (2, 3, 4) preceding the attention field (7) in the direction of the roadway (5), forming the curb ramp (1), wherein at least the sloping surface section of the curb ramp (1) has a profile (R) suitable for visually impaired persons, which is formed by diamond-shaped profile elements (PR).