Provided is an ultrasonic motor capable of efficiently producing a torsional resonant vibration by actively using the bending vibration of a piezoelectric element.

A vertical 1st order vibration is driven in a longitudinal direction L and a 2nd order bending vibration is detected by the detection electrodes (31-34) and a voltage proportional to a Coriolis force (rotational angular velocity) is outputted.

When torsional rigidity of the spring material is set low, the characteristic frequency of the twisted vibration can be reduced.

Each piezoelectric element elongates/contracts reversely in the plane direction when an AC signal is applied between these electrodes, and the piezoelectric diaphragm generates bending vibration as a whole.

Because of the deformation, the vibration of the storage disk (14) is attenuated.

The invention may be used in measuring distance, displacement, deformation, vibration, height and inclination.

Provided is an ultrasonic motor capable of efficiently producing a torsional resonant vibration by actively using the bending vibration of a piezoelectric element.

When the train with the wheel according to the invention is running, the deformation of the damping plate generating by the wheel vibration is mainly the shearing deformation.

The system includes composite riser structures incorporating strain and vibration sensors to measure changes in the stiffness strain on a first orientation and on a second orientation.

A vertical 1st order vibration is driven in a longitudinal direction L and a 2nd order bending vibration is detected by the detection electrodes (31-34) and a voltage proportional to a Coriolis force (rotational angular velocity) is outputted.

Second: The vibration continues to increase to produce a progressive deformation of the body ...

Each strain inducing section (12a) is provided with a strain sensor (20) for detecting strain of the strain inducing section (12a).

Indeed, infrared radiation excites specific vibration modes (deformation, elongation) of chemical bonds.

When torsional rigidity of the spring material is set low, the characteristic frequency of the twisted vibration can be reduced.

The cutting effort is directed along the axis of the reamer, there is no deformation or vibration.