| 摘要 |
<p>A method of analysing the condition of a surface such as that of a rail, includes: causing a vehicle to travel along the rail (3), the vehicle having a first wheel and a second wheel which are in contact with the rail; detecting through the first wheel (1) sound signals propagating along the rail from the second wheel (2) as a consequence of the second wheel travelling along the rail; and analysing the characteristic features of these sound signals to determine the condition of the rail. This method avoids the use of an ultrasonic sound generator, and can be fitted to standard freight and/or passenger trains to provide a constantly updated picture of the condition of the rails in a railway system. <IMAGE></p> |
