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
Transmitter and receiver for streaming media including packet padding
Mobile terminal and method for displaying information
Quaternary chalcogenide wafers
Assembly for providing an aligned stack of two or more modules and a lithography system or a microscopy system comprising such an assembly
Semiconductor device and manufacturing method
For a given cell in a spreadsheet, evaluating an unlimited number of conditional formatting rules and applying multiple corresponding formats to the cell
Case for electronic device
  Randomly Featured Patents
Wafer Pattern imaging apparatus
Method and apparatus for sensing a ground fault in a motor control system
Method for producing a standard pattern for pattern matching
Forming contacts on semiconductor substrates radiation detectors and imaging devices
Agrochemical composition
Dispensing cartridges having collapsible packages for use in caulking guns
Easily repairable, low cost, high speed electromechanical assembly of integrated circuit die
Magnetoresistance effect element with nano-junction between free and pinned layers
Systems and methods for interfacing video games and user communications
Play media shooting machine with improved stop control