Resources Contact Us Home
Ultrasonic distance detection for visually impaired pedestrians

Image Number 4 for United States Patent #6469956.

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.

  Recently Added Patents
Electrophoresis display having touch screen and method for driving the touch screen
Proton conducting electrolytes with cross-linked copolymer additives for use in fuel cells
Toy vehicle housing
Image correction method
Modification of an object replica
Wearable display device
Hemostatic devices and methods of making same
  Randomly Featured Patents
Shipping and display tray and package
Information recording medium and reproducing apparatus therefor
Method for producing mounting and valve bores in a wheel
Selective production of linear pentaethylenehexamine and hydroxyethyldiethylenetriamine
High speed tire for heavy duty vehicles including bead part with side packing rubber
Liquid filter
Electrical storage cell life extender
Panel type masking member
MRI compatible implantable lead
Process for purifying tetrachlorophthalic anhydride