抄録
In order to investigate the mechanism of rhythmic motions of a root, we attempted to measure biomechanical properties of the root by non-contact via an ultrasonic wave. An experimental system is composed of a newly developed transducer positioner, a CCD camera positioner, a turn table, the pulser/receiver, and so on. In this system, we used the spot focused immersion ultrasonic transducer, and by applying image processing data of a root, it can keep the focal length of the transducer and the ultrasonic beam angle in vertical direction to the surface of a root. In addition, it can measure changes with the lapse of time at any point of a root by the full automation. By using this system, we observed differences of dynamic characteristics of a root in various points in the vertical direction.
