Work

Multi-Point Laser Detection Device for Ground Hazards in Blind Mobility

Year: 2026

Type: article

Abstract: This article examines hazardous ground irregularities that remain undetectable by the white cane used by visually impaired individuals. Additionally, the development of a multi-beam laser ranging system is described. Integrated into the cane handle, this system is designed to provide comprehensive ground awareness and sufficient anticipation at a walking speed of 1 m/s. The system employs a near-infrared multi-beam laser sensor with a holographic grating generating four diamond-shaped beams, in conjunction with a high-resolution CMOS sensor. Through optical triangulation and real-time processing, the device estimates the height of obstacles or drop-offs relative to the walking surface. Vibrotactile feedback informs the user of detected hazards, with distinct vibration patterns differentiating between elevation changes and drop-offs. Preliminary trials with blind participants in controlled environments demonstrate that the system is feasible, responsive, energy-efficient, and fully compatible with conventional white cane use.

Source: Sensors

DOI: 10.3390/s26082396

Authors: Issa Berthe, Lucas Bogaert, Liam Jordan, Julien Donnez, Clément Favey, René Farcy

Institutions: Centre National de la Recherche Scientifique, Université Paris-Saclay, Laboratoire Aimé Cotton

Language: English

Topic: Assistive Technology in Communication and Mobility

Subfield: Occupational Therapy

Field: Health Professions

Domain: Health Sciences

Open Access status: gold

Estimated APC paid: $3,137

Funder: Université Paris-Saclay