Optical service tool apparatus

Details Optical service tool apparatus Optical service tool apparatus

1995-05-04

1996-06-18

Swarthout, Brent A.

Communications: electrical

Continuously variable indicating

Via radiant energy beam

34087002, 34087016, G08C 1700

Patent

active

055282334

ABSTRACT:
An optical service tool interface for a utility meter includes a probe (103) with a light source (115) emitting pulses of light. A first and second light receiver (113, 111) are mounted on a controller housing (102) of the meter (101). When the probe (103) is physically coupled to the meter's housing (102) the light source (115) is optically aligned with the first light receiver (113), and the second light receiver (111) is optically isolated from both the pulses of light emitted from the probe's light source (115) and any ambient light (117). A wakeup signal (215) is generated by the controller (200) dependent on the reception of pulses of light emitted by the probe (103) and received by the first light receiver (113) and optical isolation of the second receiver (111) from both the pulses of light emitted by the light source (115) and the ambient light (115). The wakeup signal (215) is used to power-on a high current consumption circuit (225) that allows the utility meter (101) to become fully functional.

REFERENCES:
patent: 4803632 (1989-02-01), Frew et al.
patent: 4868893 (1989-09-01), Hammond
patent: 4887312 (1989-12-01), Dannhaeuser
patent: 5010335 (1991-04-01), Coppola et al.
patent: 5019814 (1991-05-01), Biggs et al.
patent: 5371496 (1994-12-01), Tanamachi

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