Linearity correction system for electro-optical gage

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364472, 72 37, B21B 3700, G06F 1546

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active

041212916

ABSTRACT:
Computerized electro-optical system gages dimension of a moving hot bar. Back-lighted electronic camera head generates high-speed bar shadow pulses which represent the bar dimensions. Bar pulses are processed by way of camera electronics and a digital computer. CRT and printing terminals, interacting with the computer, indicate and/or record a field-of-view correction map and a cold-size bar diameter measurement.
Camera head electronics includes camera AGC, a digital type one-axis bidirectional linear sweep, bar pulse edge-detection with an autocorrelator to remove noise and enhance the bar pulse, and a digital accumulator of digital bar size signals and digital bar position-in-field-of-view signals. The digital computer assimilates bar size and bar position signals along with bar temperature, aim size, and other data signals. The computer is programmed to: (a) compensate bar size signals for field-of-view errors and other optical and electronic nonlinearities, bar temperature and other sources of error; (b) calibrate the gage off-line; and (c) communicate with the CRT and printing terminals and an exterior control system.

REFERENCES:
patent: 3676652 (1972-07-01), Millis, Jr. et al.
patent: 3686437 (1972-08-01), Leonard
patent: 3713313 (1973-01-01), Spradlin
patent: 3854822 (1974-12-01), Altman et al.
patent: 3874798 (1975-04-01), Antonsson et al.
A Microprocessor -- Based Gauge Controller for Metals Rolling Applications; D. M. Hershberger, J. G. Underwood; IEEE Transactions on Industrial Electronics and Control Instrumentation, vol. IECI-22, No. 3, Aug. 1975, pp. 333-337.

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