Pattern tracer using digital logic

Details Pattern tracer using digital logic Pattern tracer using digital logic

1981-10-02

1983-08-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

318577, G05B 100

Patent

active

043968325

ABSTRACT:
An optical pattern tracer is disclosed, of the circular scanning type. The interception of the pattern by the scan produces electrical outputs which are reduced to numerical values representative of their time of occurrence with reference to the scanning circle. The numbers derived and the nature of the signal generated are then processed to indicate the direction of the pattern, presence or absence of command marks and combined with other reference inputs, such as kerf and direction of tracing used to control a drive mechanism to move the tracer around the pattern.

REFERENCES:
patent: 3883735 (1975-05-01), Murphy et al.

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