US 12,145,721 B2
Anisotropic magneto-resistive sensor flap measuring systems
Kyle Thomas Cravener, Arlington, TX (US); Patrick Smith, Fort Worth, TX (US); Troy Cyril Schank, Keller, TX (US); Brady Garrett Atkins, Euless, TX (US); and Kynn Jerald Schulte, Arlington, TX (US)
Assigned to Textron Innovations Inc., Providence, RI (US)
Filed by Bell Textron Inc., Fort Worth, TX (US)
Filed on Dec. 17, 2021, as Appl. No. 17/555,024.
Prior Publication US 2023/0192276 A1, Jun. 22, 2023
Int. Cl. B64C 27/00 (2006.01); B64C 27/35 (2006.01); G01D 5/14 (2006.01)
CPC B64C 27/008 (2013.01) [B64C 27/35 (2013.01); G01D 5/145 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotor-hub flap-measurement system comprising:
a rotor hub operable to flap relative to a main-rotor axis;
a flap-linkage arm, a first end of the flap-linkage arm rotatably coupled to the rotor hub, the flap-linkage arm responsive to flapping of the rotor hub; and
a magneto-resistive sensor system rotatably coupled to a second end of the flap-linkage arm and responsive to movement of the flap-linkage arm;
wherein the magneto-resistive sensor system comprises:
a first magneto-resistive sensor;
a second magneto-resistive sensor; and
a magnet having a first side and a second side, wherein the magnet is positioned between the first magneto-resistive sensor and the second magneto-resistive sensor such that the first side of the magnet is directly adjacent the first magneto-resistive sensor and the second side of the magnet is directly adjacent the second magneto-resistive sensor.