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
Providing policy-based operating system services in an operating system on a computing system
Per-request control of DNS behavior
Buck converter having reduced ripple under a light load
System and method for updating firmware
System for implementing dynamic pseudorandom keyboard remapping
Bamboo scrimber and manufacturing method thereof
Managing breakpoints in a multi-threaded environment
  Randomly Featured Patents
Configurations and methods for making capacitor connections
Stacked microelectronic devices and methods for manufacturing microelectronic devices
Pallet with adjustable article mounting hardware and article attachment method
Method and apparatus for high frequency data transmission and testability in a low voltage, differential swing design
Crystalline silicon-based memristive device with multiple mobile dopant species
Method for treating products with air, a product treatment device and the products thus treated
Method and system for modeling financial markets and assets using fractal activity time
Picture encoding and/or decoding apparatus and method for providing scalability of a video object whose position changes with time and a recording medium having the same recorded thereon
Flat heater including conductive non-woven cellulose material
Method for preparing N-acetylneuraminic acid by N-acetylneuraminic acid lysase at a pH of 10-12