Sensing over a shared physical channel
US11892487B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2018 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | Mar 31, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In one aspect the invention provides a sensing apparatus comprising a set of N capacitive sensors connected over a single physical channel provided by two terminals, the apparatus comprising: a sensing array having a first capacitive sensor and N−1 parallel capacitive sensors each connected in parallel with first capacitive sensor, each capacitive sensor having electrodes separated by a dielectric to provide a capacitance which is able to vary with deformation to provide sensing, the array having a set of N−1 resistances each being in series with a respective one of the N−1 parallel capacitive sensors; a solution module operable to determine the capacitance of each capacitive sensor by finding solutions for a vector function equating reactance measured at the two terminals to an analytical model for impedance and/or reactance of the circuit seen at the two terminals, wherein the analytical model comprises N capacitances, each connected in parallel with each other, and comprises N series resistances each connected in series with a respective capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.