| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for determining operating conditions for acquiring desired operation-related values even if characteristics of a vibration generator are not obtained by experiments previously. SOLUTION: A vibration controller 22 controls the driving current of the vibration generator 1 so as to apply desired vibration to a specimen under a set exciting current. An operation-related value acquisition means 50 obtains power consumed by an exciting coil and a driving coil when control stabilizes. An exciting current changing means 52 changes the exciting current only by a minute value, when the control stabilizes. The acquisition means 50 obtains a power consumption value with respect to each exciting current value changing minutely. A displacement point detecting means 54 observes a series of power consumption values obtained by the acquisition means 50 and detects its displacement point. A point where power consumption values decreasing gradually changes to increase after that, is found out as a displacement point. An exciting current corresponding to this displacement point is set as an operating condition. Then, the number of revolutions of a blower is decided by feedback control. COPYRIGHT: (C)2011,JPO&INPIT
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