In these circumstances, we regard the reflected ultrasonic
pressure and the flight distance as the key to identifying the
materials of measured objects. However, the reflection ratio of
solid materials such as a metal, a plastic, a wood, and so on, is
nearly 100 percent in the air. In order to detect the differences
in reflected ultrasonic pressure between measured objects, we
use the power amount P of the reflected ultrasonic wave as
expressed by equation (5). The power is integrated with the
irradiation time of the ultrasonic driven by a burst wave.
In these circumstances, we regard the reflected ultrasonic
pressure and the flight distance as the key to identifying the
materials of measured objects. However, the reflection ratio of
solid materials such as a metal, a plastic, a wood, and so on, is
nearly 100 percent in the air. In order to detect the differences
in reflected ultrasonic pressure between measured objects, we
use the power amount P of the reflected ultrasonic wave as
expressed by equation (5). The power is integrated with the
irradiation time of the ultrasonic driven by a burst wave.
การแปล กรุณารอสักครู่..