Method and apparatus for characterizing pressure sensors using modulated light beam pressure
US6651481B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Dec 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L27/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Embodiments of apparatuses and methods are provided that use light sources instead of sound sources for characterizing and calibrating sensors for measuring small pressures to mitigate many of the problems with using sound sources. In one embodiment an apparatus has a light source for directing a beam of light on a sensing surface of a pressure sensor for exerting a force on the sensing surface. The pressure sensor generates an electrical signal indicative of the force exerted on the sensing surface. A modulator modulates the beam of light. A signal processor is electrically coupled to the pressure sensor for receiving the electrical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.