Photoelectric mensuration device and method for determining PDC

Details Photoelectric mensuration device and method for determining PDC Photoelectric mensuration device and method for determining PDC

1990-02-05

1991-06-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356376, G01N 2186

Patent

active

050216759

ABSTRACT:
A method and apparatus for determining the amount of material removed from an irregularly shaped object is disclosed and includes a light source, a photocell positioned to receive light from the light source, the photocell having a shape which accommodates the profile of the irregularly shaped object before any material is removed and a current-measuring read-out device operatively connected to the photocell to provide an indication of the current output of the photocell. The current-measuring read-out device displays a reading indicative of the amount of material removed from the irregularly shaped object when the irregularly shaped object, with the material missing therefrom, is placed in position against the photocell so the light from the light source strikes the photocell where the material is missing. A method is also disclosed for measuring the surface area of a substantially flat, irregularly shaped object.

REFERENCES:
patent: 3749500 (1973-07-01), Carlson et al.
patent: 4708482 (1987-11-01), Neiheisel
patent: 4770590 (1988-09-01), Hugues et al.

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