Vibration Sensors Like the balance weights on your car tires that hold down vibrations, rail systems also have to have a method of preventing vibration, especially on the High-Speed rail line where the vibration can tear the train or track apart.  To counter this, the wheels on the trucks of trains are constantly inspected and changed whenever an unbalance is found.  In High-Speed railroading constant visual inspection is difficult, thus on-board vibration sensors are used. Index of ... Innovative vibration sensors provide curve detection and derailment protection for trains