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Method and Apparatus for Characterizing Pressure Sensors using Modulated Light Beam PressureEmbodiments 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.
Document ID
20040015216
Acquisition Source
Kennedy Space Center
Document Type
Other - Patent
Authors
Robert C Youngquist
(Kennedy Space Center Merritt Island, Florida, United States)
Date Acquired
August 21, 2013
Publication Date
November 25, 2003
Subject Category
Mechanical Engineering
Report/Patent Number
NASA-Case-KSC-12183
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-6,651,481
Patent Application
US-Patent-Appl-SN-983045
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