A transducer for detecting a shaft dynamic behavior. The transducer comprises an arcuate sensor member supported between an inner member and an outer member. At least one strain gage is attached to a surface of the arcuate sensor member to detect a surface strain caused by a shaft dynamic behavior. The inner member, outer member and arcuate sensor member are substantially coplanar. The inner member comprises a means for attaching the transducer to a mounting surface. The inner member may also comprise a self-aligning feature to optimize a sensor sensitivity.
1. A sensor comprising;
an arcuate outer member;
an arcuate inner member;
an arcuate sensor member for sensing a strain;
the arcuate sensor member connected between the arcuate outer member and the arcuate inner member;
at least one strain gage disposed on a surface of the arcuate sensor member;
the arcuate outer member and the arcuate inner member are coplanar; and
the arcuate inner member comprising a bore offset from a sensor center, the sensor thereby eccentrically rotatable about the sensor center.
2. The sensor as in claim 1 wherein the arcuate sensor member and the arcuate outer member and the arcuate inner member are coplanar.
3. The sensor as in claim 1 wherein the arcuate inner member describes a bore.
4. The sensor as in claim 1 wherein the arcuate outer member and the arcuate inner member are concentric.
5. The sensor as in claim 1 further comprising an arcuate connecting member between the arcuate sensor ring and the arcuate outer ring.
6. The sensor as in claim 1 further comprising a bearing disposed in the offset bore for engaging a fastener.