Transducer for measuring a shaft dynamic behavior

Abstract

A transducer comprising an outer member, an inner member, an arcuate sensor member for sensing a strain, the arcuate sensor member disposed between the outer member and the inner member, at least one strain gage disposed on a surface of the arcuate sensor member, the arcuate sensor member connected to the outer member by a first connecting member at a first location and connected to the inner member by a second connecting member at a second location, the first connecting member and the second connecting member disposed on substantially opposing sides of the arcuate sensor member along an axis A-A, the fist connecting member having a predetermined spring rate and arcuate form compatible with the dynamic forces borne by the arcuate sensor member to minimize stresses in the first connecting member, and the outer member and the inner member are coplanar.

1 . A transducer comprising; 
 an outer member;    an inner member;    an arcuate sensor member for sensing a strain;    the arcuate sensor member disposed between the outer member and the inner member;    at least one strain gage disposed on a surface of the arcuate sensor member;    the arcuate sensor member connected to the outer member by a first connecting member at a first location and connected to the inner member by a second connecting member at a second location;    the first connecting member and the second connecting member disposed on substantially opposing sides of the arcuate sensor member along an axis A-A;    the fist connecting member having a predetermined spring rate and arcuate form compatible with the dynamic forces borne by the arcuate sensor member to minimize stresses in the first connecting member; and    the outer member and the inner member are coplanar.    
   
   
       2 . The transducer as in  claim 1 , wherein the arcuate sensor member and the outer member and the inner member are substantially coplanar.  
   
   
       3 . The transducer as in  claim 1 , wherein the outer ring comprises an aperture for accessing the arcuate sensor member.