Fall detector and method of determining a fall in a social alarm system
US9378636B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2013 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Jun 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/043
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A fall detector unit is worn by a patient and performs a wakeup when an acceleration signal exceeds a predetermined threshold. A barometer provides a series of pressure readings over a pressure examination period to provide a first pressure difference value. The pressure signals are further monitored over a compensation period after the examination period to obtain a second pressure difference value representing background environmental changes. The first pressure difference value is compensated by the second pressure difference value to obtain a total pressure difference value and thus derive a total height difference value. The fall detector unit determines a fall event using the total height difference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.