TY - PAT
T1 - OPTICAL FIBRE BEND SENSOR
AU - Greenaway, Alan, Howard
AU - Burnett, James, Gordon
AU - Harvey, Andrew, Robert
AU - Blanchard, Paul, Michael
AU - Lloyd, Peter, Arthur
AU - McBride, Roy
AU - Russell, Philip, St. John
PY - 1998/12/30
Y1 - 1998/12/30
N2 - An optical fibre bend sensor (10) measures the degree and orientation of bending present in a sensor length (30) portion of a fibre assembly (26). Within a multicored fibre (30, 32, 34), cores (62, 66) are grouped in non-coplanar pairs. An arrangement of optical elements (28, 36, 38) define within each core pair (62, 66) two optical paths (122, 124) which differ along the sensor length (30): one core (62) of a pair (62, 66) is included in the first path (122), and the other core (66) in the second path (124). A general bending of the sensor region (30) will lengthen one core (62, 66) with respect to the other. Interrogation of this length differential by means of interferometry generates interferograms form which the degree of bending in the plane of the core pair is extracted. Bend orientation can be deduced from data extracted from multiple core pairs.
AB - An optical fibre bend sensor (10) measures the degree and orientation of bending present in a sensor length (30) portion of a fibre assembly (26). Within a multicored fibre (30, 32, 34), cores (62, 66) are grouped in non-coplanar pairs. An arrangement of optical elements (28, 36, 38) define within each core pair (62, 66) two optical paths (122, 124) which differ along the sensor length (30): one core (62) of a pair (62, 66) is included in the first path (122), and the other core (66) in the second path (124). A general bending of the sensor region (30) will lengthen one core (62, 66) with respect to the other. Interrogation of this length differential by means of interferometry generates interferograms form which the degree of bending in the plane of the core pair is extracted. Bend orientation can be deduced from data extracted from multiple core pairs.
UR - https://worldwide.espacenet.com/patent/search/family/010814625/publication/WO9859219A2?q=pn%3DEP0990124A1
M3 - Patent
M1 - WO9859219
ER -