Electro-optical scanner for generating digital flaw data

Details Electro-optical scanner for generating digital flaw data Electro-optical scanner for generating digital flaw data

1977-07-22

1979-04-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

144312, G01N 2132

Patent

active

041490894

ABSTRACT:
An electro-optical scanner system for generating digital flaw data for a lumber inspection and optimization system is disclosed. The electro-optical scanner system includes an optical scanner generating analog scan data having frequency components indicative of the surface characteristics of the material being scanned. A dual quantizer separates the high frequency components of the scan data indicative of cracks, checks or splits from the low frequency components and converts both the high and low frequency components to a digital format. A digital filter removes extraneous noise from the digital high frequency scan data and a scanner interface encodes the digital high frequency and digital low frequency data in a predetermined multi-bit data byte format which simplifies data manipulation for subsequent flaw analysis by a computer.

REFERENCES:
patent: 3836261 (1974-09-01), Clarke
patent: 3897156 (1975-07-01), Chasson
patent: 3980891 (1976-09-01), Slaker

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