Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Head shield
DFPase enzymes from Aplysia californica
Vehicle battery with cell balancing current paths and method of charging the same
Device and implantation system for electrical stimulation of biological systems
Rechargeable battery including a channel member
Air driven alternators for battery powered vehicles
System and method for controlling a wireless device
  Randomly Featured Patents
Anti-theft product tag with ball clutch
Ferroelectric-photoconductor optical storage
Production of copper and sulfur from copper-iron sulfides
Amplifier circuit
Dispenser for cosmetics
Ion mobility sensor
Festoon protection method and system
Hearing aid having input AGC and output AGC
Pneumatic tool with increased power capability
Method and system for a computer-rendered three-dimensional mannequin