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
Video-recording reservation management apparatus, method, program, and system
Method and system for evaluating/analyzing patent portfolio using patent priority approach
Method, apparatus, and manufacture for adaptation of video encoder tuning parameters
Jacket liner
Method and system for remapping processing elements in a pipeline of a graphics processing unit
Receiving security risk feedback from linked contacts due to a user's system actions and behaviors
Method for counting and segmenting viral particles in an image
  Randomly Featured Patents
Light-emitting device using group III nitride group compound semiconductor
Cell search method and apparatus in a WCDMA system
Enzyme insolubilization
Electrically controlled pressure-holding valve
Capacitor having tantalum oxynitride film and method for making same
Cabinet fastener
Method and system for authenticating and utilizing secure resources in a computer system
Positioning joint for folding ladders
Image covering laminate film and image projection sheet