Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1996-04-04
1997-11-11
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
367 96, 367910, G01S 1588
Patent
active
056871368
ABSTRACT:
A user-driven, active guidance system for guiding visually impaired users through obstacle filled routes of travel. The system includes an obstacle detection system, having an array of ultrasonic sensors, which detects the distance to and location of obstacles and a controller for receiving obstacle data and determining an optimal path around the obstacle so as to return the user back to the original path of travel without losing orientation or direction. The system provides active guidance by exerting physical force upon the user to intuitively direct the user around the obstacle. The system is driven by the user's motion and comprises a cane, as well as the my of ultrasonic sensors and controller supported on a pair of guide wheels.
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Lobo Ian J.
The Regents of the University of Michigan
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