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
Wideband antenna
Anti-infective agents and uses thereof
Robot control device
Deposition apparatus and method for manufacturing organic light emitting diode display using the same
Sensor chip, sensor cartridge, and analysis apparatus
Sub-LUN input/output profiling for SSD devices
  Randomly Featured Patents
Octagonal bulk bin
Oil filter
Liquid aeration plunger
Bagel, roll, and bun holder device
Display and method for eliminating residual image thereof
Lithium manganese oxide compound and method of preparation
Heat wave shielding lamination
Parallel-structured switched variable inductor circuit
Methods and apparatus for preparing a patient's femur for patellofemoral knee arthroplasty
Apparatus for computing the quotient of two inductances in an automotive control element position sensor