Early warning method and device for preventing wheelchair from tipping over
US9549861B2 · kind B2 · utility
1Cited by
0References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2013 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Aug 30, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61G2203/72
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An early warning method and a device for preventing a wheelchair from tipping over are described. The early warning method includes projecting a laser light pattern, scanning the laser light pattern, making a comparison to determine whether the ground is a barrier terrain, and issuing an early warning to the user in situations of risk. The laser light pattern is projected onto the ground and compared with a standard pattern. The early warning is generated and is one selected from a group consisting of a beep, a warning message and a vibration to alert the wheelchair user to the danger of the barrier terrain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.