Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Electronic device including predicted frequency error estimation of a voltage controlled oscillator and related methods
Compositions for inhibiting NADPH oxidase activity
Point-of-sale server and method
Cable exit trough with insert
Jacket liner
Mask and method for forming the mask
Ink composition, ink for inkjet recording and ink set using the ink
  Randomly Featured Patents
Footwear for infants and toddlers
Reference signal for a control channel in wireless communication network
Brush seal
Chemical compounds
Semiconductor device including a resilient bonding resin
Fender protective structure
Method for background suppression in an image data processing system
Tire
Electronic component furniture construction and methods and apparatus therefor
Blister pack