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
Memristive junction with intrinsic rectifier
Virtual links in a routed ethernet mesh network
Information processing apparatus, including updating of program and program information, and method of updating program of the information processing apparatus
Vehicle window opening and closing control device
Press nut
Synthesized interoperable communications
Radio link monitoring (RLM) and reference signal received power (RSRP) measurement for heterogeneous networks
  Randomly Featured Patents
Active pixel CMOS sensor with multiple storage capacitors
Eccentricity gauge for a conductor including two inductors having opposed fields
Efficient content addressable memory array for classless inter-domain routing
Anchoring device for use in rock crevices and the like during rock climbing activities
System and method for generating ACPI machine language tables
Liquid crystal display device with resin black matrix having polarizing function
Device for controlling the function of an electric starting motor for a windshield wiper of a rear window of an automotive vehicle and for supplying an electric motor particularly to activate
Method for controlling airflow on a backside of a semiconductor wafer during spin processing
Method for machining grooves by a laser and honeycomb structure forming die and method for producing the same die
Table lamp