Characterisation of an optical strain gauge for pantograph applications

Abstract EN

An optical strain gauge is developed and characterized for an active pantograph for high-speed electrical trains applications.

Indeed, the pantograph is subjected to a continuous impact forces when it makes contact with the 25 kV overhead ac line.

To detect load behaviour experienced, by the electrical pick-up on the pantograph, tests were carried out.

The results show that the strain gauge responded linearly to static load over the range 0 to 80 Newton.

Also, a high repeatability was achieved and acceptable amount of hysteresis was experienced.

The influence of the electromagnetic field on the optical strain gauge was sufficiently weak to be neglected.

Beside that the optical strain gauge has proved a high resistance to time varying forces.