Ultrasonic distance detection for visually impaired pedestrians
US6469956B1 · kind B1 · utility
19Cited by
19References
18Claims
0Family size
Inventor
Key dates
| Filing date | Mar 27, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Mar 27, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/909
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.