Method and apparatus for accommodating power disturbances

Details Method and apparatus for accommodating power disturbances Method and apparatus for accommodating power disturbances

1987-02-02

1988-09-13

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit automatically reconnected only after the fault is...

323299, 323300, 361 86, H02H 300

Patent

active

047713569

ABSTRACT:
An irrigation system (10) including a microcomputer (12) and a delay apparatus (16). A preferred delay apparatus (16) includes a power detection circuit (20) capable of detecting short-term disturbances in the power being supplied to the microcomputer (12). Delay apparatus (16) also preferably includes a timer circuit (22) which, when power detection circuit (20) detects a short-term disturbance, acts with a switch (24) to interrupt the AC power to the microcomputer (12) for a preselected period of time. The timer circuit (22) can produce a delay of approximately five or six seconds which is suitable for causing microcomputer (12) to restart or reboot, rather than lock-up or otherwise suffer a corruption of data were the momentary power disturbance to reach microcomputer (12).

REFERENCES:
patent: 3772568 (1973-11-01), Phillips
patent: 3921058 (1975-11-01), Tanaka et al.
patent: 3940663 (1976-02-01), Meier et al.
patent: 4644137 (1987-02-01), Asahi et al.

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