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
Imidazo[1,2-B]pyridazine and pyrazolo[1 .5-A]pyrimidine derivatives and their use as protein kinase inhibitors
Implant free extremely thin semiconductor devices
Container pack
Method for programming non-volatile memory device and apparatuses performing the method
Test method for inspection device, particularly for label seating inspection device
Method of forming micropattern, method of forming damascene metallization, and semiconductor device and semiconductor memory device fabricated using the same
Key management policies for cryptographic keys
  Randomly Featured Patents
Boron-containing small molecules
Welder's trainer
Cordless security system and method
Vacuum nozzle with a push-off device
Process for the manufacture of adipic acid
Electromagnetic and/or electrohydraulic forming of a metal plate
Method and apparatus for sealing and cutting plastic films
Ballot box
Identifying multi-component carrier cells
Surface magnetometer with modulated flux gate section