Air flow surveying apparatus and method

Details Air flow surveying apparatus and method Air flow surveying apparatus and method

1994-06-21

1995-10-17

Chilcot, Jr., Richard E.

Measuring and testing

Fluid flow direction

Using a fluid actuated alignment device

7317004, G01N 1500

Patent

active

054579899

ABSTRACT:
A method for measuring a direction of a laminar air flow uses a particle stream tracing an air flow and having a grain size substantially uniform along the particle stream. The direction of the particle stream is detected by a first and a second rectangular laser beams crossing each other in the vicinity of the particle stream at right angles and rotatable around an axis passing through the cross point of the laser beams. The second laser beam is further rotatable around the axis thereof. When the particle stream crosses the laser beams along the longer sides of the rectangular radiant area of the laser beam, the amount of a scattered light generated from the laser beam is large. Hence, the direction of the particle stream is detected by the rotational angle of the second laser beam. The direction of an air flow can be measured with a good accuracy because the measurement does not disturb the original air flow.

REFERENCES:
patent: 3182499 (1965-05-01), Moses
patent: 3446558 (1969-05-01), Seaton
patent: 3448613 (1969-06-01), Kastner et al.
patent: 3537306 (1970-11-01), Bedinger
patent: 3825346 (1974-07-01), Rizzo

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