Patent ID: 7908114
Filing Date: 2011-03-15
Classification: B61L

Abstract:
1. A method for aligning a railroad signal, said method comprising: switching a controller into a calibration mode; measuring a correct tilt of the railroad signal in a proper alignment to obtain a measured correct tilt; measuring a correct direction of said railroad signal in the proper alignment to obtain a measured correct direction; switching said controller from said calibration mode to a monitoring mode; measuring a tilt of said railroad signal to obtain a measured tilt; measuring a direction of said railroad signal to obtain a measured direction; and determining if one of a measured tilt and a measured direction of the railroad signal exceed a respective tilt threshold and direction threshold stored in the memory of the controller; and detecting a presence of a mean shift over a time duration of one of said tilt and direction, which mean shift negates transient vibrations of the railroad signal during said time duration.