Highway grade crossing gate system including a gate mechanism to rotate a gate arm with human machine interface and voltage reduction circuit

Abstract

A highway grade crossing gate system comprises a gate arm configured to rotate 90 degrees from a horizontal position to a vertical position and vice versa and a highway grade crossing gate mechanism coupled to the gate arm for controlling rotation of the gate arm without mechanical user adjustments but rather use user angle and time inputs/outputs. The highway grade crossing gate mechanism includes a DC motor to drive the gate arm up and down and a voltage reduction circuit to receive an input voltage from a battery and reduce the input voltage. The highway grade crossing gate mechanism further includes a human machine interface (HMI) to receive a plurality of programmable set points as operational variables for operation of the gate arm without manually adjustable cams on a main shaft that move contacts to open or close at some preset angular rotation. The highway grade crossing gate mechanism further includes a control printed circuit board (PCB) coupled to the HMI, the voltage reduction circuit, the brake, and the DC motor. The control PCB to receive an output based on an angular position of the gate arm as a position indication to have the control PCB provide an output for the operation of the gate arm.