Research on Optimization of Remote Wave Generation Mechanism

Abstract

Aiming to establish a remote generation method of wave in a human body for an inspection of a focus, a fundamental mechanism of remote-vibration generation is investigated. Introducing a model that consists of a mass-damper-spring system subjected to periodic force and a bar in which wave propagates from the mass-spring system to a flexible body, which corresponds to a human body, output power of wave generation is analyzed and discussed in detail. As a result, it was found that when the damping ratio of the input is same as the output one, the output power becomes the maximum when the input and the output impedances match to that of the bar. Moreover, when the input damping is different from the output one, the output power becomes the maximum under the condition the length of the bar is sum of integer multiple of the half wavelength and quarter of the wavelength.