논문 상세보기
pp.1-8
Ultrasonic nondestructive testing is a versatile and successful technique that can be applied to a wide variety of material analysis applications. The state-of-art technology of sensors, microprocessors, and methods for signal analysis has been promising new possibilities for the application of ultrasonic techniques to non-destructive and non-hazardous testings. Ultrasonic material analysis is based on a simple principle of physics. That is, the motion of a wave is affected by the medium through which it travels. Thus, changes in one or more of four measurable parameters associated with the passage of a elastic wave through a material - time of flight, attenuation, scattering, and frequency content - would be correlated with changes in physical properties such as hardness, elastic modulus, density, homogeneity or particle size and structure. Ultrasonic techniques can be applied to various biosystems such as food, agricultural products and biological materials, owing to their nondestructive nature. In this paper, the principle of ultrasonic technique was briefly described and its applications to biosystems were reviewed.
