Optical system for sensing fractures in a structural component

Details Optical system for sensing fractures in a structural component Optical system for sensing fractures in a structural component

1987-08-28

1989-02-28

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340555, H01J 516, H01J 4014

Patent

active

048088145

ABSTRACT:
A system for sensing fractures in a structural component that has a plurality of light conductor fibers attached to or incorporated in the structural component, such as an aircraft body or wings made of fiber reinforced material. The light conductor fibers function as fracture sensors. For this purpose the light supply to each individual fracture sensing light conductor and the interrogation whether a light signal has passed through the light conductors is controlled by a computer. The absence of a light signal at a particular conductor signifies a fracture and this fact may be indicated on a display in the cockpit of an aircraft.

REFERENCES:
patent: 4450434 (1984-05-01), Nielson et al.
patent: 4537469 (1985-08-01), Kirchner
patent: 4603252 (1986-07-01), Malek et al.
patent: 4654520 (1987-03-01), Griffiths
Flight International, Mar. 3, 1984, pp. 575-577.

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