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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
Document Type
Other - Patent
Authors
Youngquist, Robert C. (NASA Kennedy Space Center Cocoa Beach, FL, United States)
Date Acquired
August 21, 2013
Publication Date
November 25, 2003
Subject Category
Mechanical Engineering
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-Case-KSC-12183|US-Patent-6,651,481
Patent Application
US-Patent-Appl-SN-983045
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