Capacitive shift-force sensor
US10775247B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Sep 16, 2019 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Sep 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N19/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The capacitive shift-force sensor is made in the form of a deformable casing defined by two parallel rigid plates spaced from each other and interconnected by two deformable members. The sensor is provided with two capacitors, wherein one capacitor plate of each capacitor is rigidly connected to one rigid plate and the other capacitor plate is rigidly connected to the other rigid plate. In an unloaded state of the sensor, capacitor gaps of both capacitors are equal and the capacitors have the same capacitive characteristics. However, when one of the rigid plates is maintained immobile and the other one is shifter under the effect of an applied shift force, the capacitor gaps of the capacitors, and hence, the capacitive characteristics of the capacitors, change differently, and with the use of a differential amplifier this difference is measured and recalculated into the value of the applied shift force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.