Oscillatory failure monitor

Details Oscillatory failure monitor Oscillatory failure monitor

1983-02-28

1986-01-21

Heyman, John S.

Excavating

371 68, 377 16, G06F 1130

Patent

active

045661014

ABSTRACT:
An oscillatory-failure monitor (101) compares a parameter of a plurality of signals (A, B) within a tolerance (TOL) to determine agreement or disparity among the signals. Each discrete miscompare occurrence (i.e., singular disparity following full agreement) is counted by incrementing (27; 54) a counter (OSCCT; CNTR). The counter is decremented (32; 62) whenever the signals compare for a predetermined time interval (29; 47). An oscillatory-failure is declared when the counter increments to a threshold (28, 21; 57, 58, 60). Both digital (FIG. 1) and dedicated hardware (FIG. 4) embodiments are disclosed.

REFERENCES:
patent: 4053751 (1977-10-01), Ault
patent: 4234953 (1980-11-01), Kline
patent: 4263583 (1981-04-01), Wyckoff
patent: 4363123 (1982-12-01), Grover
patent: 4475086 (1984-10-01), Allen

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