Algorithm for detecting activation of a push button
US9322724B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2011 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | May 11, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to an algorithm for detecting activation of a tactile pressure sensor having a mechanic structure that includes the steps of: (a) measuring periodically an input quantity (V0; f0) of the sensor, when it is not pressed, the period being set according to sensor dynamic requirements; (b) computing a current idle quantity (Vidle; fidle) depending on the input quantity (V0; f0) measured at step a); (c) computing an activation threshold (ΔVP; ΔfP) based on a quantity characterization of the sensor mechanic structure and depending on the idle quantity (Vidle; fidle) defined at step b); (d) comparing the sensor input quantity (V0; f0) with the last defined idle quantity (Vidle; fidle) increased by the activation threshold (ΔVP; ΔfP) computed in step c) in order to determine whether the sensor is pressed or not.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.