US 12,436,166 B2
Flow angle sensor with image sensor
Aswin Kumar Vallamkondu, Banglore (IN); Kent Allan Ramthun, Shakopee, MN (US); Naveen Kumar Devarakonda, Bangalore (IN); Jeremy S. Burns, Farmington, MN (US); Alexander N. Reid, St. Louis Park, MN (US); Karthik Jegatheeswaran, Bangalore (IN); and Venkata Sai Sudheer Kumar Vennelakanti, Bengaluru (IN)
Assigned to Rosemount Aerospace Inc., Burnsville, MN (US)
Filed by Rosemount Aerospace Inc., Burnsville, MN (US)
Filed on Nov. 2, 2022, as Appl. No. 17/979,335.
Claims priority of application No. 202141055481 (IN), filed on Nov. 30, 2021.
Prior Publication US 2023/0168270 A1, Jun. 1, 2023
Int. Cl. G01P 13/02 (2006.01); B64D 47/00 (2006.01); G01P 1/02 (2006.01)
CPC G01P 13/025 (2013.01) [B64D 47/00 (2013.01); G01P 1/02 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A flow angle sensor comprising:
a housing;
a faceplate positioned on the housing;
a vane assembly adjacent to the faceplate, the vane assembly including a vane connected to a vane shaft;
a disk connected to and rotatable with the vane shaft, wherein the disk has a marker utilized for angle indication;
a light source within the housing and positioned to illuminate the disk such that light reflects from the disk;
a lens positioned to receive light reflected from the disk;
an image sensor positioned to receive light from the lens to sense a location of the marker on the disk; and
an image processing system connected to the image sensor, wherein the image processing system provides an angle of attack output based on the location of the marker sensed by the image sensor,
wherein a focal length of the lens is a distance between the lens and the image sensor, a working distance is a distance between the disk and the lens, and the focal length divided by the working distance is equal to a diagonal length of the image sensor divided by the field of view.