Conveyance warning member with sacrificial fiber

Details Conveyance warning member with sacrificial fiber Conveyance warning member with sacrificial fiber

1998-10-27

1999-11-23

Kim, Robert H.

Optics: measuring and testing

For optical fiber or waveguide inspection

405157, 324326, G01N 2100

Patent

active

059910135

ABSTRACT:
A warning tape (10) burial above an underground conveyance (13) includes a sacrificial fiber (12). A monitoring device, such as an AOTDR (25) monitors the sacrificial fiber (12) for damage caused by excavation. Upon detecting such damage, the monitoring indicates both the existence and location of such excavation by triggering a warning (26) to generate an alert, and by providing location information to a display device (32).

REFERENCES:
patent: 4767237 (1988-08-01), Cosman et al.
patent: 4875722 (1989-10-01), Gentile
patent: 4904050 (1990-02-01), Dunn et al.
patent: 5093568 (1992-03-01), Maycock

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