Method and apparatus for monitoring the operating condition of l

Details Method and apparatus for monitoring the operating condition of l Method and apparatus for monitoring the operating condition of l

1993-05-24

1995-11-28

Coles, Sr., Edward L.

Communications: electrical

Condition responsive indicating system

Specific condition

340635, 340458, G08B 2100

Patent

active

054712017

ABSTRACT:
An apparatus for monitoring the state of operation of lamp (2) in a public lighting network is provided comprising a sensing unit (6) associated with each lamp (2) for measuring the voltage of and luminous flux emitted by each lamp (2). Each sensing unit (6) also calculates the efficiency of lamp using an efficiency index given by the gradient of the line which, in a Cartesian diagram in which the voltage of the lamp is the x-coordinate and the flux the y-coordinate, represents the instantaneous relationship between the parameters.

REFERENCES:
patent: 5095502 (1992-03-01), Finzel
patent: 5202636 (1993-04-01), Powell

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