| 摘要 |
PROBLEM TO BE SOLVED: To obtain highly accurate measurements conveniently simply through measurement during operation by measuring the time being elapsed until a plurality of rotor blades are detected through rotor blade tip detectors after starting measurement of an arbitrary time and then storing, operating and controlling a measured time data. SOLUTION: The vibration measuring apparatus comprises rotor blade tip detectors S1, S2,..., Sn arranged on the rotational periphery of rotor blades B1, B2,..., Bn, output amplifiers A1, A2,..., An, counters C1, C2,..., Cn, memory means M1, M2,..., Mn, and an operation control section CTR. The counter begins measurement of time at an arbitrary moment of time and stores the time elapsed before an output signal is received from the rotor blade tip detectors sequentially in the memory means. Timing of a series of detection signals from rotor blade tip detectors is processed totally and statistically. Vibration of the rotor blade is calculated from the measurement of rotor blade passing time under a situation of a rotary machine where the rotor blade is not displaced from a regular position and the actual measurement of each rotor blade passing time at the measuring time.
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