Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 02, 2019 - November 04, 2019
The purpose of this study is to evaluate the surface condition of road material, such as dry, wet, icy and snowy, by using the ultrasonic system on the moving vehicle. As a first step, we use ultrasonic transducer with a central frequency of 40 kHz, and five kinds of road material were used as the specimen for examination and verification of the possibility of evaluation by the ultrasonic with moving. The ultrasonic wave which propagated to the specimen in the air reflects at the material surface by the difference of an acoustic impedance and surface condition, and it is received the ultrasonic transducer. The ultrasonic system is moved at a walking speed for measurement. As a result, five kinds of road material was distinguished by using mean value and standard deviation of maximum amplitude.
