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
Modular microscope construction
Azole derivatives, methods for producing the same, intermediate thereof, agro-horticultural agents
System for seeking for an optimal configuration of a bi-, tri- or multi-ventricular cardiac resynchronization implanted device
Ranging method and apparatus in passive optical network
Intrinsic absorber layer for photovoltaic cells
Lipoprotein analysis by differential charged-particle mobility
Reconstruction of deforming surfaces by canceling ambient occlusion and refining 3-D shape
  Randomly Featured Patents
Wafer lens and method for the production thereof
Volumetric filling system apparatus
Suppressing dark current in charge-coupled devices
Magnetic ink character reading apparatus
Surface-coated metallic pigment, water base paint containing the same, and coated product to which water base paint has been applied
Collector apparatus for gaseous reaction products
Logarithmic amplifier
Peach tree (A3-10)
Remote controller for vehicle security system
Organophilic clay compositions