Orthogonal shear stress measurement probe assembly for boundary

Details Orthogonal shear stress measurement probe assembly for boundary Orthogonal shear stress measurement probe assembly for boundary

1995-06-19

1997-04-22

Raevis, Robert

Measuring and testing

Wind tunnel: aerodynamic wing and propeller study

G01N 1100

Patent

active

056230966

ABSTRACT:
An orthogonal shear stress measurement probe assembly is provided for meaements away from a solid surface or a vehicle wall. The assembly includes a plurality of micron-sized floating element drag sensors mounted on a 2 mm stainless steel needle. The needle is in turn supported by a streamlined probe which provides both a support for the needle-drag sensor assembly and a conduit for electrical lead. The electrical leads connect the drag sensing elements, which contain piezo-resistive elements, to an external portion of a bridge. These resistive elements form one-half of a bridge, the remaining bridge elements, amplifiers, read-out circuits and power supply are located outside the probe.

REFERENCES:
patent: 3382712 (1968-05-01), Lurry
patent: 4896098 (1990-01-01), Haritonidis et al.
patent: 5052228 (1991-10-01), Haritonidis
patent: 5199298 (1993-04-01), Ng et al.

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