Ultrasonic distance detection for visually impaired pedestrians

Details Ultrasonic distance detection for visually impaired pedestrians Ultrasonic distance detection for visually impaired pedestrians

A - Human Necessities

61

F

A61F 9/08 (2006.01) G01S 15/08 (2006.01) G01S 15/93 (2006.01) G01S 7/53 (2006.01)

Patent

CA 2267435

Ultrasound is used to determine, by echo ranging, the distance of objects in front of a user for allowing a visually impaired pedestrian to walk safely. A double circuit allows two simultaneous measurements. Distances measured are converted into human paces or steps. Then each ear of the human receives measurement information. The user can calibrate the apparatus for his or her own stride.

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