Resources Contact Us Home
Ultrasonic path guidance for visually impaired

Image Number 10 for United States Patent #6671226.

An ultrasonic path guidance system and method for the visually impaired uses an array of ultrasound transmitters that are directional and aimed at distinct locations forward of the user. The transmitters are positioned on the torso of the individual user and one or more receivers detect echoes from obstacles upon which the transmitted ultrasound sound impinges. Audible tone is generated each time an echo is received. The tone's frequency is dependent on which transmitter transmitted the original ultrasound pulse that resulted in the detected echo. This gives an easy to understand indication of the location of detected obstacles. The elapsed time from emission of an ultrasound pulse to reception of its echo is used to arrive at the distance to the obstacle.

  Recently Added Patents
Real-time virtual endoscopy
Method and apparatus for policy-based network access control with arbitrary network access control frameworks
Electronic component mounting machine and operating instruction method for the same
Toy vehicle housing
Security access protection for user data stored in a cloud computing facility
RPM Controlled Wind Power Generation System
Substituted di-arylhydantoin and di-arylthiohydantoin compounds and methods of use thereof
  Randomly Featured Patents
Process for fabricating films of uniform properties on semiconductor devices
Collective automatic gain control
Planetary steering system for a skid-steered vehicle
Method of splicing an optical fiber with holes in the cladding
Location service-providing system and deferred location request service-providing method using previously computed location in location service-providing system
Methods and systems for reducing heat flux in memory systems
Communication transceiver having a three-line balun with power amplifier bias
Radiographic silver halide photographic material having a good developing speed, an excellent image tone and low residual color after processing
Thermoplastic elastomer compositions rheology-modified using peroxides and free radical coagents
Free-cutting steel