Sensor assembly for detecting position of spring-loaded target surface and method of detecting position through multiple structures

摘要

Sensor body 32 extends through first structure 16, and second structure 18 (Fig. 1) disposed radially outwardly of first structure 16. Structures 16 and 18 may be casings of an aircraft turbine engine. First end 34 of sensor body 32 is disposed proximate first environment 14; second end 36 is located radially outwardly of second structure 18. Sealing assembly 50 couples sensor body 32 to second structure 18, and accommodates movement of sensor body 32. Position sensor 100 is coupled to sensor body 32, and determines a position of target 13. Target 13 may be coupled to an adjustable stator vane; its position may be an angular displacement. In an embodiment, target 13 comprises contoured (maybe inclined) surface 104. Rotation angle may be determined from a distance between sensor face 102 and contoured surface 104. Biasing member 106 biases target 13 into constant contact with sensor body 32, advantageously accommodating thermal changes of sensor position.