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
Compounds with (1 E, 6E)-1,7-bis-(3,4-dimethoxyphenyl)-4,4-disubstituted-hepta-1,6-diene-3,5-d- ione structural scaffold, their biological activity, and uses thereof
Rose plant named `Esm R068`
Near-field transducers for focusing light
Apparatus with a local timing circuit that generates a multi-phase timing signal for a digital signal processing circuit
SIC semiconductor device and method for manufacturing the same
Reflective mask blank and method of manufacturing a reflective mask
Image forming apparatus and control method therefor
  Randomly Featured Patents
High voltage sensor device
Production of electrophoretically-homogenous protein-colloidal gold complexes
High level expression of human cyclooxygenase-2
Apparatus and method for displaying a plurality of generated video images and externally supplied image data
Automatic spoken language identification based on phoneme sequence patterns
Electrical switching device
Beginning-of-tape sensor with automatic threshold adjustment
Thermal transfer printer
Semi-flash A/D converter using switched capacitor comparators
Contact and omnidirectional reflective mirror for flip chipped light emitting devices