Patents by Inventor Andrew R Harvey

Andrew R Harvey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6621956
    Abstract: 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 from 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.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: September 16, 2003
    Assignee: Qinetiq Limited
    Inventors: Alan H Greenaway, James G Burnett, Andrew R Harvey, Paul M Blanchard, Peter A Lloyd, Roy McBride, Philip St John Russell
  • Publication number: 20020097960
    Abstract: An optical fiber bend sensor (10) measures the degree and orientation of bending present in a sensor length (30) portion of a fiber assembly (26). Within a multicored fiber (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 from 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.
    Type: Application
    Filed: January 24, 2002
    Publication date: July 25, 2002
    Applicant: The Secretary of State for Defence
    Inventors: Alan H. Greenaway, James G. Burnett, Andrew R. Harvey, Paul M. Blanchard, Peter A. Lloyd, Roy McBride, Philip St John Russell
  • Patent number: 6389187
    Abstract: An optical fiber bend sensor (10) measures the degree and orientation of bending present in a sensor length (30) portion of a fiber assembly (26). Within a multicored fiber (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 from 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.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: May 14, 2002
    Assignee: Qinetiq Limited
    Inventors: Alan H Greenaway, James G Burnett, Andrew R Harvey, Peter A Lloyd, Roy McBride, Philip St John Russell, Paul M Blanchard