System and method for energy efficient measurement of sensor signal
US9946410B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2014 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Jan 12, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/96073
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for improving robustness of a capacitive sensor system has the following steps: a) operating the capacitive sensor system, wherein received sensor signals are filtered by a band-pass filter having a band-pass having a first center frequency; b) polling sensor data at a first rate using the sensor system; c) determining whether a polled sensor value is meeting a predetermined threshold; d) if the predetermined threshold is met: d1) polling sensor data at a second rate being higher than the first rate using the sensor system; d2) verifying that sensor data polled at the second rate are consistent; d3) if the sensor data polled at the second rate are inconsistent, then repeating at least step d2) wherein said band-pass filter is controlled to have a second center frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.