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Development of a New Negative Obstacle Sensor for Augmented Electric Wheelchair.
Clément Favey1, René Farcy2, Julien Donnez2
1Chaire Handicap & Technologie Polytech Paris-Saclay, Université Paris-Saclay, CEDEX, 91405 Orsay, France.
Sensors (Basel, Switzerland)
|October 13, 2021
Summary
This study introduces a new optoelectronic sensor system to enhance electric wheelchair safety for individuals with motor and cognitive/visual impairments. The system detects dangerous height differences, preventing falls and enabling independent mobility.
Area of Science:
- Robotics and Assistive Technology
- Optoelectronics and Sensor Technology
- Human-Computer Interaction
Background:
- Individuals with combined motor, cognitive, and/or visual impairments face significant challenges with independent mobility.
- Conventional electric wheelchairs pose safety risks for these individuals due to potential collisions and falls.
- Existing technological solutions do not adequately address the need for safe autonomous travel for this population.
Purpose of the Study:
- To develop and present an optoelectronic sensor system for enhancing the safety of electric wheelchair navigation.
- To specifically address the detection of dangerous height differences (negative obstacles) to prevent falls.
- To create a robust and adaptable system compatible with various electric wheelchair models.
Main Methods:
- Development of a novel optical triangulation-based sensor using multiple laser beams to detect height differences.
- Engineering the sensor for robustness in adverse weather conditions (sunlight, rain) and high measurement rates.
- Designing an adapted algorithm to process sensor data and manage wheelchair movement, considering compromises between laser orientation and speed.
Main Results:
- Successful creation of a dedicated sensor capable of detecting dangerous height differences.
- Demonstrated robustness of the sensor in direct sunlight and rain.
- Achieved a measurement rate suitable for the dynamic requirements of electric wheelchair displacement.
Conclusions:
- The developed optoelectronic sensor system offers a promising solution for improving electric wheelchair safety.
- This technology has the potential to significantly enhance the independent mobility and quality of life for individuals with complex disabilities.
- Further research and development are needed to optimize the system's performance and integration, particularly concerning laser beam orientation and maximum wheelchair speed.
