Centrifuge having control unit that stops rotation of a rotor when a displacement-conversion value satisifies a displacement determination criterion

A centrifuge comprising:

• a rotor;
• a driving source that rotates the rotor;
• a rotating shaft that links the rotor with the driving source;
• an acceleration sensor that outputs a value indicating acceleration in at least two different directions which are orthogonal to an axial direction of the rotating shaft;
• and
• a control unit that obtains a displacement-conversion value corresponding to a value, the value being obtained by dividing a value which is proportional to acceleration based on a value indicating acceleration and outputted by the acceleration sensor, by a value which is proportional to a square of an angular velocity of the rotor, and that stops rotation of the rotor when the displacement-conversion value satisfies a displacement determination criterion which is predetermined and indicates that displacement is large, wherein
• a range that corresponds to an angular velocity at which displacement of the rotating shaft of the rotor increases due to resonance is defined to be a resonance range,
• the control unit obtains the displacement-conversion value when an angular velocity of the rotor is in a predetermined range of an angular velocity, the predetermined range being below the resonance range, so as to confirm whether the displacement-conversion value satisfies the displacement determination criterion, and
• a case of the displacement-conversion value, the displacement-conversion value being smaller than a maximum displacement conversion value in the resonance range in allowable maximum imbalance, is included in a range satisfying the displacement determination criterion.