Device for digitally determining and safeguarding a thermal imag

Details Device for digitally determining and safeguarding a thermal imag Device for digitally determining and safeguarding a thermal imag

1986-08-21

1988-01-05

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 92, 361103, 207 66, H02H 504

Patent

active

047179848

ABSTRACT:
A device is provided for digitally determining and safeguarding a thermal image including a processor connected to at least one sensor able to form a digital image of the thermal state of an apparatus, a random access memory containing the thermal image formed by the processor and a safeguard for storing, should there be a voltage cut, the instantaneous thermal image. The safeguard includes a programmable digital counter fed by a capacity curing power-cuts and equipped with a clock which modifies its counting state for the duration of the absence of voltage. The processor reads the state of the counter after restoration of the voltage.

REFERENCES:
patent: 4216421 (1980-08-01), Dupont
patent: 4288865 (1981-09-01), Graham
patent: 4291355 (1981-09-01), Dinger
patent: 4413325 (1983-11-01), Elfner et al.
patent: 4573132 (1986-02-01), Boothman et al.
patent: 4617473 (1986-10-01), Bingham

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