| 摘要 |
PROBLEM TO BE SOLVED: To measure precisely the magnitude and the direction of unbalance of a rotor. SOLUTION: A vibration signal obtained from a vibration sensor of a dynamic unbalance testing machine is subjected to A/D conversion and taken in as a digital value, while an X-direction standard function and a Y-direction standard function are generated based on a rotary standard pulse. After multiplying the vibration signal and each standard function together, averaging processing by a digital filter is executed, to thereby operate correlation coefficients. The magnitude and the direction of unbalance is operated based on an X-direction correlation coefficient and a Y-direction correlation coefficient obtained in this way.
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