In all the parts of a driving train, bearings are the easiest to be damaged. In spite
of their small sizes, they are very important. If the bearings are damaged, an accident
of trains can happen. As special vehicles, trains’accidents always lead to very large
loss of money and lives. In our country, the monitoring devices and ways are far away
from advanced countries. It is a very important task of departments of railways to
develop a easy kind of monitoring...