Method and apparatus for measuring the size distribution of part

Details Method and apparatus for measuring the size distribution of part Method and apparatus for measuring the size distribution of part

1990-08-06

1991-06-25

Fields, Carolyn E.

Radiant energy

Fluent material containment, support or transfer means

With irradiating source or radiating fluent material

250253, 250255, 2504721, G01T 704

Patent

active

050269941

ABSTRACT:
Particle detection devices for measuring the size distribution data of the parallel plate and screen diffusion types are disclosed in order to determine the distribution of ultrafine and attached particles in both analog and digital form. A gradual changing of the dimensions of the detector chambers is discslosed for varying the airstream velocity and for spreading out the plating out of the particles so that the distribution of different size particles can be determined. Recent improvements in health risk evaluation data indicate it is important to have detailed size distribution data for ultrafine particles in order to fully evaluate the health risks.

REFERENCES:
patent: 4607165 (1986-08-01), Burghoffer et al.
patent: 4704527 (1987-11-01), Peodi
patent: 4704528 (1987-11-01), Peodi
patent: 4847503 (1989-07-01), Tetley et al.
patent: 4963730 (1990-10-01), Tetley et al.

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