Patent ID: 9732624
Date: 2017-08-15
CPC Classifications: F01D,F05D

Claim:
1. A turbine, comprising: an outer duct; a turbine casing formed to define a turbine interior, the turbine casing being disposed within the outer duct to define an annulus; a vane element pivotably coupled to the turbine casing via a spindle to extend spanwise into the turbine interior, the spindle comprises a threaded screw pivotable with the vane element to be linearly moved relative to the waveguide; and a sensor element supportively coupled to the outer duct and configured to sense a characteristic of the spindle within the annulus from which a pivot angle of the vane element is derivable, the sensor element comprises a microwave sensor including a waveguide and the characteristic comprises a linear distance between complementary ends of the waveguide and the threaded screw.