Electronic comparator for process control

Details Electronic comparator for process control Electronic comparator for process control

1976-09-27

1978-06-27

Waring, Alvin H.

Communications: electrical

Systems

Call station

356159, G01B 1106

Patent

active

040978494

ABSTRACT:
An optical micrometer scans an article passing through its zone of measurement to provide a series of pulses representing the dimension of an article. Each new measurement is compared against a previous measurement, or an average of a predetermined number of previous measurements, and the difference is then compared to a previously established deviation limit. If this difference does not exceed the deviation limit, then the new measurement is transferred to the output of the circuit for utilization by the system, but if this difference exceeds the deviation limit, then the previous measurement signal will be transferred to the output. An alarm is provided whenever a predetermined number of new measurement signals outside the deviation limit occur within a certain number of measurement intervals.

REFERENCES:
patent: 3039687 (1962-06-01), Chope
patent: 3562708 (1971-02-01), Verbarg et al.

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