Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1985-08-16
1986-11-11
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250231R, 324 96, H01J 516
Patent
active
046224602
ABSTRACT:
A fibre optic magnetic sensor is disclosed. The sensor has a thin-walled cylindrical barrel with a mid-section which is elastically radially deformable. A single mode optical fibre is wound about the mid section of the barrel. A magnetostrictive element is located within the center of the barrel and secured to both ends of the barrel. Changes in the external magnetic field in the vicinity of the sensor cause changes in the length of the magnetostrictive element and consequently cause axial forces to be applied to the end of the barrel. The mid-portion of the barrel deforms radially, thus inducing a strain in the optical fibre from which the external magnetic field strength may be deduced.
REFERENCES:
patent: 4240066 (1980-12-01), Lenox
patent: 4379226 (1983-04-01), Sichling et al.
patent: 4384253 (1983-05-01), Forster
Failes Michael
Mouroulis Pantazis
Goldberg Edward
Her Majesty the Queen in right of Canada as represented by the
Kanars Sheldon
Madoo L. W.
Murray Jeremiah G.
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