FIBER OPTIC LIGHT SENSOR SYSTEM

摘要

A fiber optic light sensor system employs a fiber optic cable having a core and an annular jacket, the annular jacket covers the core along a jacketed section (20) of the cable to prevent extraneous light from coupling into the cable. One or more sensing sections (16) along the length of the cable where the core is not covered by the jacket are used to receive light from areas of interest such as electrical enclosures (18). A photo detector (26) is coupled to one end of the cable and detects a light signal that enters the cable at the sensing section (16). Signal processing instrumentation (24) connected to the photo detector (26) then processes the light signal. Optionally, a Built-In-Test feature employs a light source (58) to send test signals throughout the system.