Shear stress measurement apparatus
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United States of America Patent
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Aug 10, 2010
Grant Date -
May 28, 2009
app pub date -
Nov 26, 2008
filing date -
Nov 27, 2007
priority date (Note) -
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Abstract
A shear stress sensor for measuring the shear force of a fluid flowing along a wall. A floating member, flush with the wall, senses a shear force of the flowing fluid. The floating member is mounted by support means to a base element that is placed in the wall, so that the floating member is flush with the wall and a shear force, sensed by the floating member, is translated via the support means to a micro-resonator. The force acting on the micro-resonator changes the shape and the refractive index of the micro-resonator, thereby changing the resonant frequency of the micro-resonator and causing a shift in the spectrum of wavelengths of light that is introduced to the micro-resonator. This shift in the spectrum of wavelengths is representative of the shear force of the flowing fluid.
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