Abstract
In this paper, it is a target to measure a mechanical characteristic of a living body and to detect the foreign object such as a tumor in a body. First, a living body is modeled as a concentrated mass model. This model consists of masses, springs, and dampers. Then, a frequency response is measured when a surface of a living body is excited by a vibrator. We propose the identification method of a mechanical characteristic by comparing the measured frequency response with the calculated frequency response by using the concentrated mass model. In addition, we propose an identification method of a mechanical characteristic, and a distance from a surface to a boundary plane when a living body has two different physical properties. We performed the vibration experiments that a silicon was excited by a vibrator and an acceleration was measured on the opposite side to the excited surface. Then, we confirmed the validities of these identification methods.
