Temperature measurement for rail
When taking the subway，Cooperate with station staff to measure body temperature
It has become a part of our daily life.
But have you ever heard of: How about "temperature measurement" for steel rails?
We all know that all objects have the characteristics of "heat expansion and cold contraction"
Our rails are no exception.
The rise of daytime temperature may lead to the change of rail state. Due to the reason of "thermal expansion and cold contraction", the rail will expand. When the expansion reaches a certain extent, the rail will deform, which is called "rail expansion". If the "rail expansion" is not handled in time, the "rail expansion runway" phenomenon will occur, and the track will become curved and uneven.
The safety and stability of the track line with "expanding track" will be greatly reduced, and even cause a major accident of train overturning. Therefore, in order to ensure the safety of train operation, our rail also needs to measure the "temperature" regularly.