Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-03-02
1994-08-16
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25022721, 7386259, G01L 110
Patent
active
053389298
ABSTRACT:
In a method for monitoring strain variations of a strain responsive element of a micromachined sensor device while subjected to outside parameter conditions, at least two oscillation resonance modes of said element are activated and interrogated optically. Thereby correspondingly at least two resonance frequencies are obtained. From parameter/frequency characteristics of said device correspondingly at least two parameter values are derived.
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Search Report dated Jun. 15, 1993 attached.
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Holmes, Ian. Letter from Elsevier Sequoia S. A. verifying the date of distribution of vol. A31 of Sensors and Actuators dated Mar. 10, 1993.
Douma Bindert S.
Eigenraam Peter
Lee John R.
Nelms David C.
Reynolds Fred S.
Shell Oil Company
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