Method to determine a pressure noise metric for fall detection systems
US10330494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2014 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Apr 18, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D3/036
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wearable fall-detection device has a variety of sensors, including a pressure sensor, that provide signals for sampling environmental conditions acting on the device. An average of pressure data samples is used to determine a resultant that may indicate an amount of noise in a pressure data signal, and statistical analysis of the noise and the pressure signal average may be used to determine a confidence estimate value that indicates a level of confidence in the amount of noise that a pressure signal is subject to, or includes. The confidence estimate and known fall data, such as change in pressure between a person standing and lying, can create a threshold function that may adapt according to sampled data thus providing a customizable (either statically or dynamically) threshold function for comparing sensor data against rather than comparing data with just a linear threshold function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.