A system (90) for measuring the gap (16) between a rotating blade (14) and a stationary component (12) of a turbo-machine, including an eddy current coil (30) and an eddy current tester (91). The eddy current tester may excite the coil in a pulsed eddy current testing mode. The coil is positioned in...http://www.google.de/patents/US6949922?utm_source=gb-gplus-sharePatent US6949922 - Turbine blade clearance on-line measurement system
