Resources Contact Us Home
Ultrasonic distance detection for visually impaired pedestrians

Image Number 4 for United States Patent #6469956.

Ultrasound is used to determine, by echo ranging, the distance of objects in front of a user for allowing a visually impaired pedestrian to walk safely. A double circuit allows two simultaneous measurements. Distances measured are converted into human paces or steps. Then each ear of the human receives measurement information. The user can calibrate the apparatus for his or her own stride.

  Recently Added Patents
Method for superconducting connection between MgB2 superconducting wires via a MgB2 matrix made from a boron powder compressed element infiltrated with Mg
Polymers derived from benzobis(silolothiophene) and their use as organic semiconductors
Steplessly adjustable cymbal locating device
Cell reselection and handover with multimedia broadcast/multicast service
Method and device for managing a turning setpoint applied to at least one turning actuator for the rear wheels of an automobile
Prevention and reduction of blood loss
Signal processing device, signal processing method and program
  Randomly Featured Patents
Preparation of solutions of azo methine basic dyestuffs
Obstetric analgesia system
Ventilated infant's mattress
Parallel operation controller for power converters
Time balance based prepaid subscriber database and reporting
Two-stroke internal combustion engine
Towing hitch
Composition for anchoring a material in or to concrete or masonry
Display device
Gain control amplifier