Capacitively coupled position encoder
US7123027B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2005 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | Jun 22, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
One embodiment of the present invention includes a sensor with a face having several tracks spaced apart from one another. One of these tracks has a first electrode and a second electrode separated by an electrically nonconductive gap. Also included is a detection device extending across the tracks to receive signals by capacitive coupling. Sensor circuitry electrically coupled to the tracks and the detection device is structured to generate a first number of bits from a sequential signal pattern applied to the tracks in accordance with an established sequence. The circuitry is also structured to generate a second number of bits as a function of a first signal and a second signal. The first bits and second bits represent a position of the detection device along the tracks with the first bits being more numerically significant than the second bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.